JP2016109840A - Display device and method for controlling display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve display quality in each display mode even when screen display is switched between single-screen display and multi-screen display.SOLUTION: A display device comprises: a display unit 30 for displaying an image on a liquid crystal panel 321; a display control unit 13 for switching between single-screen display in which one display area is disposed on the liquid crystal panel 321 and multi-screen display in which the liquid crystal panel 321 is divided into a plurality of display areas, and making the image displayed for each display area; and a gamma correction execution unit 22 and a color irregularity correction execution unit 23 for correcting the image for each display area in correspondence to the arrangement state of display areas on the liquid crystal panel 321.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a display device and a display device control method.

Conventionally, various correction methods for improving the color reproducibility of a display device have been proposed (see, for example, Patent Documents 1 and 2).
Patent Document 1 discloses color correction using a color correction table. This color correction table reduces the color conversion amount as the lightness decreases, and the color conversion amount is almost zero when the lightness becomes smaller than a predetermined value. It is set to be. Further, the color correction by the color correction table is performed by moving the color point in the direction in which the lightness is maintained, or by moving the color point in the direction in which the lightness is increased.
In addition, in Patent Document 2, in a display device including a display panel such as a liquid crystal panel, a PDP, or an organic EL panel, in order to prevent white balance from being disturbed when the gradation is changed,
A drive signal for driving the display panel is corrected by an LUT (Look Up Table).

JP 2003-18415 A JP 2006-113151 A

Recent display devices have been improved in image quality, and display panels with high resolution have been mounted. And other display modes, such as a multi-screen display which divides | segments a display panel into a some display area, and is displayed using the merit of such a high resolution, are proposed. For this reason, in color conversion for improving the color reproducibility of the display device, it has been desired to deal with other display modes.
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to improve display quality in each display mode even when the screen display is switched between single-screen display and multi-screen display. .

In order to achieve the above object, according to the present invention, in a display device, a display unit that displays an image on a display panel, a one-screen display in which one display area is arranged on the display panel, and a plurality of displays of the display panel are displayed. A display control unit that switches between multi-screen display divided into regions and displays an image for each display region, and a correction that corrects the image for each display region in accordance with the arrangement state of the display region on the display panel And a section.
According to this configuration, even when the screen display is switched between the single screen display and the multi-screen display, the image corresponding to the arrangement state in the display area of the display panel is corrected, and the display quality in each display mode is improved. Can be achieved.

In the display device, the correction unit corrects an image based on display characteristics of the display panel.
According to this configuration, correction according to the display characteristics of the display panel can be performed to improve display quality.

The present invention further includes an image processing unit that adjusts an image for each display region and displays the adjusted image on the display unit in the display device, and the correction unit is adjusted by the image processing unit. The image is corrected in accordance with the arrangement state of the display area.
According to this configuration, it is possible to improve the display quality by performing correction corresponding to the arrangement state of the display area on the image.

The display device may further include a storage unit that stores correction data in association with the arrangement state of the display area, and the correction unit stores the correction data corresponding to the arrangement state of the display area. And correcting the image based on the acquired correction data.
According to this configuration, the image can be corrected with the correction data corresponding to the arrangement state of the display area, and the display quality can be improved.

According to the present invention, in the display device, the storage unit stores correction data in association with an arrangement state of the display area and a setting relating to a display quality of an image, and the correction unit is configured to display the multi-screen display. When displaying an image on the first display area and the second display area of the display panel, the display position of the first display area on the display panel and the image displayed on the first display area Correcting the image using correction data corresponding to a setting relating to display image quality, a display position of the second display area on the display panel, and a setting relating to the display image quality of an image to be displayed in the second display area; The image is corrected using correction data corresponding to.
According to this configuration, it is possible to improve the display quality by correcting the image with the correction data according to the arrangement state of the display area and the setting relating to the display image quality.

According to the present invention, in the display device, the storage unit associates gamma correction data used for gamma correction of an image as the correction data with the arrangement state of the display area and the setting related to the display image quality. It is characterized by storing a plurality.
According to this configuration, it is possible to perform gamma correction of an image using gamma correction data according to the arrangement state of the display area of the display panel and the setting related to display image quality, thereby improving display quality.

In the display device according to the aspect of the invention, the storage unit may include, as the correction data, color unevenness correction data used for color unevenness correction of an image, an arrangement state of the display area, and an image to be displayed on the display panel. A plurality of information is stored in association with settings relating to image quality.
According to this configuration, it is possible to correct the color unevenness of the image using the color unevenness correction data according to the arrangement state of the display area of the display panel and the setting related to the display image quality, thereby improving the display quality.

In order to achieve the above object, the present invention provides a method for controlling a display device including a display unit that displays an image on a display panel, and includes a one-screen display in which one display area is arranged on the display panel; The display panel is switched to a multi-screen display that divides the display panel into a plurality of display areas, and an image is displayed for each display area. It is characterized by correcting.
According to this configuration, even when the screen display is switched between the single screen display and the multi-screen display, the image corresponding to the arrangement state in the display area of the display panel is corrected, and the display quality in each display mode is improved. Can be achieved.

It is a functional block diagram of a projector and a peripheral device of an embodiment. It is a figure which shows the display mode of a projector. It is a figure which shows another display mode of a projector. It is a functional block diagram which shows the structure of an image process part and a display part. It is a flowchart which shows the main flow of LUT creation. It is a flowchart which shows the detail of a color characteristic measurement process. It is a flowchart which shows the detail of a gamma correction LUT creation process. 10 is a flowchart illustrating details of color unevenness correction LUT creation processing. (A) is a figure which shows the color correction characteristic of the left side display area, (B) is a figure which shows the color correction characteristic of the right side display area. (A) is a figure which shows the correction characteristic of 1 screen display mode, (B) and (C) are figures which show the correction characteristic which divided | segmented the correction characteristic of 1 screen display mode into 2 parts. (A) And (B) is a figure which shows the correction characteristic in a division | segmentation display. It is a flowchart which shows the process sequence of a projector.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a projector 1 according to an embodiment to which the present invention is applied and various peripheral devices connected to the projector 1. In FIG. 1, an image supply device 2, a surface measurement device 40, and an image adjustment device 50 are shown as peripheral devices.

First, the projector 1 will be described. The projector 1 projects a projection image P based on the image data D1 supplied from the image supply device 2 onto a screen SC as a projection surface. The projector 1 includes an I / F (interface) unit 11 and is connected to a plurality of image supply devices 2 via the I / F unit 11. The plurality of image supply devices 2 supply image data D1 of still images or moving images to the projector 1. The image supply device 2 is, for example, a DV
It is selected from an image reproducing device such as a D player, a broadcast receiving device such as a digital TV tuner, and a video output device such as a video game machine or a personal computer. Further, the image supply device 2 may be a communication device that communicates with a personal computer or the like and receives image data. Further, the image supply device 2 is not limited to a device that outputs the image data D1 in a digital format, and may be a device that outputs an analog image signal. In this case, it is preferable to provide an A / D converter that generates digital image data D1 from an analog image signal on the output side of the image supply device 2 or the input side of the projector 1.
Further, the specific specifications of the interface for connecting the image supply device 2 and the projector 1 and the number of the image supply devices 2 connectable to the projector 1 are arbitrary. That is, FIG.
4 shows a configuration in which four image supply devices 2 are connected to the projector 1, but the number of image supply devices 2 that can be connected to the projector 1 is not limited to four.

The projector 1 includes an operation display unit 12 and a display control unit 13. The operation display unit 12 includes an operation panel provided with a switch and a display panel for displaying information such as an operation mode of the projector 1. The operation display unit 12 includes an infrared light receiving unit that receives a signal corresponding to an operation of a remote controller (not shown).
Further, the operation display unit 12 may include only an operation button and may not have a display unit such as a display panel.

The display control unit 13 detects the connection of the image supply device 2 by a sensor (not shown).
The port of the F unit 11 is set to a state where data can be input and output. In addition, the display control unit 13 may set the port of the I / F unit 11 in a state in which data can be input / output according to the operation input received by the operation display unit 12.

Further, the display control unit 13 controls the image processing unit 20 described later to change the display mode of the projection image P displayed on the screen SC. The display mode of the projection image P includes a single screen display mode and a multi-screen display mode. The one-screen display mode is a mode in which the projection image P based on the image data D1 input from one image supply device 2 is displayed on the entire surface S of the screen SC as shown in FIG.
In the multi-screen display mode, as shown in FIG. 3, the projection image is displayed in each display area S1, S2, S.
3 and S4 are displayed side by side. In the multi-screen display mode, as shown in FIG. 3, the screen SC is divided into a plurality of display areas S1, S2, S3, and S4. And the projection image based on the image data D1 supplied from several image supply apparatus 2A, 2B, 2C, 2D is displayed side by side in each display area S1, S2, S3, S4.
In the multi-screen display mode, for example, one main screen and one or more sub-screens may be displayed side by side to display a TV video on the main screen and an Internet Web video on the sub-screen. In the multi-screen display mode, television images of different channels can be displayed on the main screen and the sub screen. The multi-screen display mode also includes so-called picture-in-picture (PIP) in which one or more sub-screens are displayed on one main screen.

The display control unit 13 inputs display mode selection information from the operation display unit 12. Further, the display control unit 13 further inputs the setting of the division pattern from the operation display unit 12. The user
The display mode of the projector 1 is set by operating the operation display unit 12. As described above, the display modes include the single screen display mode and the multi-screen display mode. Further, when the user selects the multi-screen display mode as the display mode, the user operates the operation display unit 12 to further input the division pattern setting. The division pattern is a pattern for dividing the display area of the liquid crystal panel 321 of the light modulation unit 32 in the multi-screen display mode. By dividing the display area of the liquid crystal panel 321 into a predetermined pattern, the projection image P projected on the screen SC is also displayed according to the division pattern of the liquid crystal panel 321. Examples of the division pattern include a four-screen division and a two-screen division shown in FIG.
Furthermore, when the multi-screen display mode is set as the display mode, the display control unit 13
The setting of an image to be displayed in each display area of the liquid crystal panel 321 is input. For example, the display control unit 13 displays identification information of each image supply device 2 connected to the projector 1 on the operation display unit 12 and an image schematically showing the display area of the liquid crystal panel 321. The image schematically showing each display area of the liquid crystal panel 321 is, for example, an image in which the display area is divided in accordance with the input division pattern setting.
The user inputs a selection of a display area for displaying an image supplied from the image supply device 2 from the operation display unit 12 while viewing the display on the operation display unit 12. The display control unit 13 creates display area setting information in which the identification information of the image supply device 2 and the identification information for identifying the display area of the liquid crystal panel 321 are associated with each other according to the input of the operation display unit 12. The display area setting information is the image data D supplied from the image supply device 2 instead of the identification information of the image supply device 2.
One identification information may be used. In addition, as identification information for identifying the display area of the liquid crystal panel 321, a coordinate value on the liquid crystal panel 321 indicating the existence range of each display area can be used.
The display control unit 13 displays the input display mode selection information and the division pattern setting information input when the display mode is the multi-screen display mode, the image correction unit 21, the gamma correction LUT selection unit 27, and the color unevenness. The result is output to the correction LUT selection unit 28. In addition, the display control unit 13 outputs the created display area setting information to the image correction unit 21 and the image composition unit 24.

The display control unit 13 is connected to a data line that connects the I / F unit 11 and the image processing unit 20, and receives image data D <b> 1 output from the I / F unit 11. The display control unit 13 inputs the image data D1, determines the resolution of the image data D1, whether it is a still image or a moving image,
The attributes of the image data D1, such as the frame rate in the case of a moving image, are determined. The display control unit 13 outputs the determined attribute including the resolution information of the image data D1 to the image correction unit 21 of the image processing unit 20 described later. The image correction unit 21 corrects the image based on the attribute input from the display control unit 13.
The display control unit 13 automatically selects a color mode according to the determined attribute of the image data D1. The color mode is a setting relating to the display image quality of the image, and is a setting for adjusting the display image quality of the projection image in accordance with the type of image, viewing environment, and the like. Examples of the color mode include a “brightness priority mode” that prioritizes image brightness, a “color priority mode” that prioritizes color reproducibility, and a “dynamic mode” that is suitable for viewing in a bright environment. In addition, the color mode is suitable for viewing in low light, the “natural mode” for reproducing images faithful to the input signal in a dark environment, and suitable for watching movies in a dark environment. There is “Theater Mode”.
The display control unit 13 causes the operation display unit 12 of the projector 1 to display the selected color mode as the recommended color mode. The display control unit 13 sets the recommended color mode to the operation display unit 1.
2 and the operation display unit 12 accepts a color mode selection input. When the recommended color mode is selected by the operation display unit 12, the display control unit 13 selects the gamma correction LUT selection unit 27 and the color unevenness correction LUT selection using the selected recommended color mode information as color mode selection information. To the unit 28. When a color mode different from the recommended color mode is selected by operating the operation display unit 12, the display control unit 13 displays the selection information of the selected color mode as the gamma correction LUT selection unit 27 and the color. Unevenness correction LUT selection unit 28
Output to.

Here, the configuration of the image processing unit 20 and the display unit 30 will be described with reference to FIG.
The image processing unit 20 performs image processing on the image data D1 input via the I / F unit 11, and generates data (one frame of data) for forming the projection image P. Image processing unit 2
0 outputs the generated data to the display unit 30 as an image signal D3. The image processing unit 20
Image correction unit 21, gamma correction execution unit 22, color unevenness correction execution unit 23, image composition unit 24, gamma correction LUT storage unit 25, color unevenness correction LUT storage unit 26, gamma correction LUT selection unit 27,
An uneven color correction LUT selection unit 28 is provided.
FIG. 4 illustrates a configuration in which the image processing unit 20 is provided with one image correction unit 21, gamma correction execution unit 22, and color unevenness correction execution unit 23. In addition to this, a plurality of processing paths for processing the image data D1 may be provided, and the image correction unit 21, the gamma correction execution unit 22, and the color unevenness correction execution unit 23 may be arranged in each processing path.

Image data D <b> 1 supplied from the image supply device 2 is input to the image correction unit 21 via the I / F unit 11. The image correction unit 21 also receives from the display control unit 13 display mode selection information, resolution information of the image data D1, division pattern setting information when the display mode is the multi-screen display mode, and a display area. Setting information is input.

The image correction unit 21 adjusts the image for each display area of the liquid crystal panel 321. Image correction unit 21
Determines which display area of the liquid crystal panel 321 the image data D1 input from the I / F unit 11 is, and performs a scaling process as image adjustment. Hereinafter, the processing of the image correction unit 21 will be specifically described.
First, the image correction unit 21 uses the display mode selection information input from the display control unit 13 to
The display mode set for the projector 1 is determined. When the display mode is the single screen display mode, the image correction unit 21 enlarges or reduces the image data D1 based on the resolution information of the image data D1 input from the display control unit 13. Then, the image correction unit 21 performs a scaling process for matching the resolution of the image data D1 with the resolution of the liquid crystal panel 321 included in the light modulation unit 32. When the display mode is the single screen display mode, the image correction unit 21 performs a process of matching the resolution of the image data D1 with the resolution of the liquid crystal panel 321.
When the display mode set for the projector 1 is the multi-screen display mode, the image correction unit 21 acquires the resolution of each display area based on the setting information of the division pattern. For example, in a memory (not shown) provided in the image correction unit 21, resolution information set in each display area of the liquid crystal panel 321 is stored for each division pattern such as two-screen division or four-screen division. When the image correction unit 21 receives the image data D1, the image correction unit 21 refers to the display region setting information and acquires information on the display region of the liquid crystal panel 321 that displays an image based on the image data D1. Next, the image correction unit 21 refers to the memory based on the acquired display area information, and acquires information about the resolution of the corresponding display area. When acquiring the resolution information of the display area, the image correction unit 21 performs a scaling process for matching the resolution of the image data D1 with the acquired resolution of the display area.

Further, the image correction unit 21 performs noise removal, frame interpolation processing, processing for converting the frame rate of the image data D1, and the like on the image data D1 based on attributes input from the display control unit 13. Further, the image correction unit 21 performs distortion correction processing for correcting trapezoidal distortion and barrel distortion, processing for adjusting image quality such as brightness, contrast, and sharpness on the image data D1 based on the attribute. The image correction unit 21 outputs the corrected image data D1 to the gamma correction execution unit 22.

The gamma correction execution unit 22 and the color unevenness correction execution unit 23 correct color misregistration and color unevenness in the projection image P to improve color reproducibility and color uniformity. That is, in the projection image P, color misregistration occurs due to the color characteristics of the liquid crystal panel 321 included in the light modulation unit 32. In addition, the projection image P
In this case, a color difference occurs between the central portion and the peripheral portion. The gamma correction execution unit 22 and the color unevenness correction execution unit 23 correct these color misregistration and color unevenness by processing using an LUT.

Image data D <b> 1 is input from the image correction unit 21 to the gamma correction execution unit 22. The gamma correction execution unit 22 applies the light modulation unit 3 to the image data D1 corrected by the image correction unit 21.
Gamma correction is performed so as to compensate for the color misregistration of the liquid crystal panel 321 included in 2.
The gamma correction execution unit 22 includes a storage element such as an SRAM that stores one or a plurality of LUTs, and is connected to the gamma correction LUT storage unit 25. The gamma correction execution unit 22 stores the gamma correction LUT input from the gamma correction LUT storage unit 25 in the storage element, and executes gamma correction based on the gamma correction LUT stored in the storage element. The gamma correction execution unit 22 outputs the corrected image data to the color unevenness correction execution unit 23.

The image data D 1 is input from the gamma correction execution unit 22 to the color unevenness correction execution unit 23.
The color unevenness correction execution unit 23 applies the image data D1 input from the gamma correction execution unit 22 to the image data D1.
Color unevenness is corrected so as to compensate for the color difference between the central portion and the peripheral portion (peripheral portion) of one frame, that is, color unevenness.
The color unevenness correction execution unit 23 includes a storage element such as an SRAM that stores one or a plurality of LUTs, and is connected to the color unevenness correction LUT storage unit 26. The color unevenness correction execution unit 23 stores the color unevenness correction LUT input from the color unevenness correction LUT storage unit 26 in the storage element, and executes color unevenness correction based on the color unevenness correction LUT stored in the storage element. The uneven color correction execution unit 23 outputs the corrected image data to the image composition unit 24.

The correction performed by the uneven color correction execution unit 23 is a process of bringing the color of the peripheral portion of the projection image P close to the color of the central portion in order to eliminate or reduce the color difference between the central portion and the peripheral portion of the projection image P. is there. Accordingly, it can be said that the color unevenness correction execution unit 23 is a process of adding the correction amount (LUT value) of the gradation value that has been subjected to the gamma correction by the gamma correction execution unit 22 in accordance with the pixel position and the gradation value. Therefore, it can be said that the color unevenness correction LUT used by the color unevenness correction execution unit 23 includes an addition amount corresponding to the coordinates of the pixel and the gradation value.

Display area setting information is input to the image composition unit 24 from the display control unit 13. In addition, the image composition unit 24 receives the image data D <b> 1 corrected by the color unevenness correction execution unit 23. The image synthesizing unit 24 includes a frame memory (not shown), and develops the image data D1 that has been subjected to color unevenness correction input from the color unevenness correction executing unit 23 in the frame memory.
In addition, when the multi-screen display mode is set, the image composition unit 24 converts each image data D1 input from the color unevenness correction execution unit 23 into a corresponding area of the frame memory according to the display area setting information. expand. When the image data for one frame is developed in the frame memory, the image composition unit 24 outputs the developed image for each frame to the modulation control unit 35 as an image signal D3.

The gamma correction LUT storage unit 25 stores a plurality of gamma correction LUTs created by a gamma correction LUT creation unit 53 described later. The gamma correction LUT includes data for correcting the color of the projection image P to be the original display color of the image data D1 based on the display characteristics of the liquid crystal panel 321 included in the light modulator 32. The gamma correction execution unit 22 generates a gamma correction LUT.
Are used to perform multi-gradation and reassignment processing of the image data input from the image correction unit 21.

The gamma correction LUT storage unit 25 stores a gamma correction LUT (hereinafter referred to as “one-screen gamma correction LUT”) used for gamma correction when displaying one screen. Gamma correction LUT
The storage unit 25 stores a plurality of one-screen gamma correction LUTs corresponding to the color mode.
The gamma correction LUT storage unit 25 stores a gamma correction LUT (hereinafter referred to as a multi-screen gamma correction LUT) used for gamma correction in multi-screen display. The single-screen gamma correction LUT and the multi-screen gamma correction LUT are created by the gamma correction LUT creation unit 53.
The multi-screen gamma correction LUT includes a division pattern and a liquid crystal panel 321 for each divided display area.
A plurality of information is prepared according to the arrangement information such as the upper position and the color mode set for the image to be displayed in each display area. For example, it is assumed that the number of divisions of the liquid crystal panel is 4, and there are two types of color modes, a theater mode and a living mode. In this case, eight LUTs are prepared as multi-screen gamma correction LUTs. The eight LUTs are (Theater mode, upper right display area), (Living mode, upper right display area), (Theater mode, lower right display area),
(Living mode, lower right display area), (Theater mode, upper left display area), (Living mode, upper left display area), (Theater mode, lower left display area), (Living mode, lower left display area). (Theater mode, upper right display area) is an LUT used for image gamma correction when an image is displayed in the theater mode in the upper right display area S2 when the liquid crystal panel 321 is divided into four as shown in FIG. It is. (Living mode, upper right display area)
This is an LUT used for image gamma correction when an image is displayed in the living area in the upper right display area S2 when the liquid crystal panel 321 is divided into four as shown in FIG. (Theater mode, lower right display area) is used for image gamma correction when an image is displayed in the theater mode in the lower right display area S4 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT to perform. (Living mode, lower right display area) is used for image gamma correction when an image is displayed in the living area in the lower right table area S4 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT to perform. (Theatre mode, upper left display area) is an LUT used for image gamma correction when an image is displayed in the upper left display area S1 when the liquid crystal panel 321 is divided into four as shown in FIG. It is. (Living mode, upper left display area) is an LUT used for image gamma correction when an image is displayed in the upper left display area S1 when the liquid crystal panel 321 is divided into four as shown in FIG. It is. (Theater mode, lower left display area) shows the liquid crystal panel 321 in FIG.
As shown in FIG. 4, the LUT is used for gamma correction of an image when an image is displayed in the theater mode in the lower left display area S3. (Living mode, lower left display area) is an LUT used for image gamma correction when an image is displayed in the lower left display area S3 when the liquid crystal panel 321 is divided into four as shown in FIG. It is.
In addition, it is assumed that the division pattern is divided into two screens, and the color mode is two types of the theater mode and the living mode. In this case, four LUTs are prepared as multi-screen gamma correction LUTs. The four LUTs are (theater mode, left display area), (living mode, left display area), (theater mode, right display area), and (living mode, right display area).
(Theater mode, left display area) is used for gamma correction of the image when displaying the image in theater mode on the left display area (first display area) when the liquid crystal panel 321 is divided into left and right. LUT to perform. (Living mode, left display area) is the liquid crystal panel 321
This is an LUT used for gamma correction of an image when an image is displayed in the living area in the left display area when the image is divided into left and right. (Theater mode, right display area) is used for gamma correction of the image when the image is displayed in the theater mode on the right display area (second display area) when the liquid crystal panel 321 is divided into left and right parts. LUT to perform. (Living mode, right display area) is an LUT used for gamma correction of an image when an image is displayed in the right display area when the liquid crystal panel 321 is divided into left and right parts.

The color unevenness correction LUT storage unit 26 stores a plurality of color unevenness correction LUTs created by the color unevenness correction LUT creation unit 54 described later. The color unevenness correction LUT includes data for correcting the gradation for each pixel position in the frame based on the display characteristics of the liquid crystal panel 321 included in the light modulation unit 32. The color unevenness correction execution unit 23 uses the color unevenness correction LUT to perform color unevenness of the image data input from the gamma correction execution unit 22, that is, between the central portion and the peripheral portion (peripheral portion) in one frame of the image data. Compensate for color differences between.

The color unevenness correction LUT storage unit 26 stores a color unevenness correction LUT (hereinafter referred to as a 1 screen color unevenness correction LUT) that is used for color unevenness correction when displaying one screen. The color unevenness correction LUT storage unit 26 stores a color unevenness correction LUT (hereinafter referred to as a multiscreen color unevenness correction LUT) used for color unevenness correction in multi-screen display. The one-screen color unevenness correction LUT and the multi-screen color unevenness correction LUT are created by the color unevenness correction LUT creation unit 54.
A plurality of multi-screen gamma correction LUTs are prepared according to the division pattern, the arrangement information such as the position of the display area on the liquid crystal panel 321 divided according to the division pattern, and the color mode set for the image displayed in each display area. Has been. For example, it is assumed that the division pattern is divided into four screens, and the color mode has two types of a theater mode and a living mode. In this case, eight LUTs are prepared as multi-screen color unevenness correction LUTs. The eight LUTs are (Theater mode, upper right display area), (Living mode, upper right display area), (Theater mode,
(Lower right display area), (living mode, lower right display area), (theater mode, upper left display area), (living mode, upper left display area), (theater mode, lower left display area), (living mode, lower left display area) ).
(Theater mode, upper right display area) is used to correct color unevenness of an image when an image is displayed in the upper right display area S2 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT. (Living mode, upper right display area) is the liquid crystal panel 32
This LUT is used to correct color unevenness of an image when an image is displayed in the display area S2 in the upper right when 1 is divided into four as shown in FIG. (Theater mode, lower right display area) is the lower right display area S when the liquid crystal panel 321 is divided into four as shown in FIG.
Reference numeral 4 denotes an LUT used to correct image color unevenness when an image is displayed in the theater mode. (Living mode, lower right display area) is used to correct image color unevenness when an image is displayed in the lower right display area S4 when the liquid crystal panel 321 is divided into four as shown in FIG. The LUT to use. (Theater mode, upper left display area) is used to correct color unevenness of an image when an image is displayed in the theater mode in the upper left display area S1 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT. (Living mode,
The upper left display area) is an LU used to correct image color unevenness when an image is displayed in the living area in the upper left display area S1 when the liquid crystal panel 321 is divided into four as shown in FIG.
T. (Theater mode, lower left display area) is used for correcting uneven color of an image when an image is displayed in the lower left display area S3 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT. (Living mode, lower left display area) is used to correct image color unevenness when an image is displayed in the lower left display area S3 when the liquid crystal panel 321 is divided into four as shown in FIG. LUT.
In addition, it is assumed that the division pattern is divided into two screens, and the color mode is two types of the theater mode and the living mode. In this case, as the multi-screen color unevenness correction LUT, four LUs
T is prepared. The four LUTs are (theater mode, left display area), (living mode, left display area), (theater mode, right display area), and (living mode, right display area).
(Theater mode, left display area) is used to correct image color unevenness when an image is displayed in the theater mode on the left display area (first display area) when the liquid crystal panel 321 is divided into left and right parts. The LUT to use. (Living mode, left display area) is the liquid crystal panel 321
Is an LUT used to correct image color unevenness when displaying an image in the living mode in the left display area when the image is divided into left and right. (Theater mode, right display area) is used to correct image color unevenness when an image is displayed in theater mode on the right display area (second display area) when the liquid crystal panel 321 is divided into left and right parts. The LUT to use. (Living mode, right display area) is an LUT used for correcting color unevenness of an image when an image is displayed in the right display area when the liquid crystal panel 321 is divided into left and right parts.

The gamma correction LUT selection unit 27 is connected to the display control unit 13 and the gamma correction LUT storage unit 25.
The display mode information, division pattern setting information, and color mode information are input from the display control unit 13 to the gamma correction LUT selection unit 27. The gamma correction LUT selection unit 27
A selection signal for selecting a gamma correction LUT in accordance with display mode selection information, division pattern setting information, and color mode selection information input from the display control unit 13 is displayed as a gamma correction LUT.
The data is output to the storage unit 25.
For example, it is assumed that the display mode input to the gamma correction LUT selection unit 27 is the multi-screen display mode and the division pattern is four-screen division. Further, it is assumed that the input color mode is that the upper right display area and the lower left display area are the theater mode, and the lower right display area and the upper left display area are the living mode. In this case, the gamma correction LUT selection unit 27 performs the gamma of (theatre mode, upper right display area), (living mode, lower right display area), (living mode, upper left display area), and (theater mode, lower left display area). A selection signal for selecting the correction LUT is output to the gamma correction LUT storage unit 25.

The gamma correction LUT storage unit 25 outputs a corresponding gamma correction LUT to the gamma correction execution unit 22 in accordance with the selection signal input from the gamma correction LUT selection unit 27. The gamma correction execution unit 22 stores the gamma correction LUT input from the gamma correction LUT storage unit 25 in the storage element, and executes gamma correction based on the gamma correction LUT stored in the storage element. That is, the gamma correction execution unit 22 corrects the image displayed in the corresponding display area using the gamma correction LUT selected by the gamma correction LUT selection unit 27 according to the arrangement state of the display area on the liquid crystal panel 321. The gamma correction LUT selection unit 27 determines the display area arrangement state on the liquid crystal panel 321 based on display mode selection information and division pattern setting information.

The color unevenness correction LUT selection unit 28 is connected to the display control unit 13 and the color unevenness correction LUT storage unit 26.
Display mode information, division pattern setting information, and color mode information are input from the display control unit 13 to the color unevenness correction LUT selection unit 28. The color unevenness correction LUT selection unit 28
According to the display mode selection information, the division pattern setting information, and the color mode selection information input from the display control unit 13, a selection signal for selecting the color unevenness correction LUT is used as the color unevenness correction LUT.
The data is output to the storage unit 26.
For example, it is assumed that the display mode input to the color unevenness correction LUT selection unit 28 is the multi-screen display mode and the division pattern is four-screen division. Further, it is assumed that the input color mode is that the upper right display area and the lower left display area are the theater mode, and the lower right display area and the upper left display area are the living mode. The color unevenness correction LUT selection unit 28 performs color unevenness correction LUTs of (theater mode, upper right display area), (living mode, lower right display area), (living mode, upper left display area), and (theater mode, lower left display area). Color correction L for the selection signal for selecting
The data is output to the UT storage unit 26.

The uneven color correction LUT storage unit 26 outputs the corresponding uneven color correction LUT to the uneven color correction execution unit 23 according to the selection signal input from the uneven color correction LUT selection unit 28. The color unevenness correction execution unit 23 stores the color unevenness correction LUT input from the color unevenness correction LUT storage unit 26 in the storage element, and executes color unevenness correction based on the color unevenness correction LUT stored in the storage element. That is, the color unevenness correction execution unit 23 uses the color unevenness correction LUT selected by the color unevenness correction LUT selection unit 28 according to the arrangement state of the display area on the liquid crystal panel 321 to display an image to be displayed in the corresponding display area. to correct. The color unevenness correction LUT selection unit 28 determines the display area arrangement state on the liquid crystal panel 321 based on display mode selection information and division pattern setting information.

The display unit 30 projects the projection image P on the screen SC based on the image signal D3 output from the image processing unit 20. The display unit 30 includes a light source 31, a light modulation unit 32, a projection optical system 33, a light source control unit 34, and a modulation control unit 35.

The light source 31 includes lamps such as a xenon lamp and an ultrahigh pressure mercury lamp, or a solid light source such as an LED and a laser light source. The light source 31 is turned on by power supplied from the light source control unit 34 and emits light L1 toward the light modulation unit 32.

The light modulation unit 32 includes three liquid crystal panels 321 corresponding to the respective colors of red (R), green (G), and blue (B). The light modulation unit 32 transmits the light L 1 emitted from the light source 31 to the liquid crystal panel 321 and guides the transmitted light to the projection optical system 33. A modulation control unit 35 is connected to the liquid crystal panel 321 of the light modulation unit 32. The modulation control unit 35 drives each pixel of the liquid crystal panel 321 and draws an image on the liquid crystal panel 321 in units of frames (screens). The light L1 is modulated by an image drawn on the liquid crystal panel 321 to become image light L2, and is projected onto the screen SC via the projection optical system 33, thereby forming a projected image P on the screen SC.

A reflector that guides the light emitted from the light source 31 to the light modulation unit 32 may be provided in the optical path between the light source 31 and the light modulation unit 32 or the light modulation unit 32. Further, a lens group (not shown) for enhancing the optical characteristics of the light emitted from the light source 31, a polarizing plate, or a dimming element that reduces the amount of light emitted from the light source 31 may be provided.
In addition, the light modulation unit 32 can be configured to use a reflective liquid crystal panel 321.
In this case, the light modulation unit 32 reflects the light L1 to the liquid crystal panel 321 and guides the reflected light to the projection optical system 33.

Next, the surface measuring device 40 and the image adjusting device 50 as peripheral devices will be described.
For example, the image adjustment apparatus 50 is connected to the projector 1 in the LUT creation process before the projector 1 is shipped. The image adjusting device 50 is connected to a surface measuring device 40 that detects the color of the projected image P on the screen SC.

The surface measuring device 40 includes an image sensor composed of a CCD, a CMOS, or the like, captures a projection image P projected by the projector 1, and in-plane two-dimensional distribution image data of X, Y, Z tristimulus values from the captured image data. Is generated. The surface measuring device 40 generates data D5 indicating color characteristics (VT characteristics) for each position in the screen of the projection image P from the generated in-plane two-dimensional distribution image data, and the generated data D5 is used as the image adjusting device 50. Output to.
The image adjustment device 50 generates a one-screen gamma correction LUT, a multi-screen gamma correction LUT, a one-screen color unevenness correction LUT, and a multi-screen color unevenness correction LUT based on the data D5 input from the surface measuring device 40. Hereinafter, when the one-screen gamma correction LUT and the multi-screen gamma correction LUT are collectively referred to as a gamma correction LUT, the one-screen color unevenness correction LUT and the multi-screen color unevenness correction LUT are collectively referred to. Is called an uneven color correction LUT.
The image adjustment apparatus 50 outputs the generated gamma correction LUT to the gamma correction LUT storage unit 25 and stores it in the gamma correction LUT storage unit 25. Further, the image adjustment apparatus 50 outputs the generated color unevenness correction LUT to the color unevenness correction LUT storage unit 26, and the color unevenness correction LUT storage unit 2.
6 is stored.

In the LUT creation process before shipment of the projector 1, a computer as the image supply device 2 is connected to the projector 1. The computer outputs the pattern image data for surface measurement to the projector 1 as image data D1. This pattern image data is an entire surface uniform image (raster image) of each RGB color, and is displayed for the number of gradations to be measured.
The computer as the image supply device 2 generates a pattern image by software, or reads out and outputs a pattern image prepared in advance. In addition, the surface measurement device 40 is controlled by a computer as the image supply device 2 to display a pattern image and the surface measurement device 4.
The shooting with 0 may be synchronized. Further, the computer as the image supply device 2 may control the luminance of the light source 31 when the projector 1 projects the pattern image.

The gamma correction target calculation unit 51 obtains a target XYZ value for creating the gamma correction LUT based on the target color space (for example, sRGB) and the color characteristics included in the data D5.

The color unevenness correction target calculation unit 52 obtains a target XYZ value for color unevenness correction based on color characteristic data included in the data D5 input from the surface measuring device 40.

The gamma correction LUT creation unit 53 generates the target XYZ obtained by the gamma correction target calculation unit 51.
A one-screen gamma correction LUT and a multi-screen gamma correction LUT are created based on the values. As a specific process performed by the gamma correction LUT creation unit 53, for example, a known method described in Patent Document 2 described above can be used.

The color unevenness correction LUT creation unit 54 calculates the target XYZ obtained by the color unevenness correction target calculation unit 52.
Based on the values, a one-screen color unevenness correction LUT and a multi-screen color unevenness correction LUT are created. As a specific process performed by the color unevenness correction LUT creation unit 54, for example, a known method described in Patent Document 2 described above can be used.

The image adjustment apparatus 50 outputs the gamma correction LUT created by the gamma correction LUT creation unit 53 to the gamma correction LUT storage unit 25 and stores it in the gamma correction LUT storage unit 25. Also,
The image adjustment apparatus 50 outputs the color unevenness correction LUT created by the color unevenness correction LUT creation unit 54 to the color unevenness correction LUT storage unit 26 and stores the color unevenness correction LUT storage unit 26. Before the projector 1 is shipped, the image adjustment device 50 creates an LUT for each projector 1, thereby creating an LUT corresponding to the individual difference of the projector 1, and color reproducibility and color uniformity of all the projectors 1. It is possible to improve the performance.

Although FIG. 1 illustrates a configuration in which the surface measurement device 40 and the image adjustment device 50 are connected as external devices of the projector 1, the projector 1 includes the surface measurement device 40 and the image adjustment device 50.
It can also be set as the structure provided with. In this case, the surface measuring device 40 only needs to be able to capture the projection image P on the screen SC. If the projector 1 includes an imaging unit (not shown) for trapezoidal distortion correction, this imaging unit can be used. Further, the CP constituting the image processing unit 20
The function of each unit of the image adjustment apparatus 50 can be realized by a processor such as U executing software. Further, the image processing unit 20 may store a pattern image output from the image supply device 2 to the projector 1. In this case, the projector 1 alone can create the gamma correction LUT and the color unevenness correction LUT, and even after the projector 1 is shipped, the projector 1 can create the LUT alone. Accordingly, it is possible to correct image data using the optimal gamma correction LUT and color unevenness correction LUT in accordance with the temporal change of the light emission characteristics of the light source provided in the projector 1 and the color characteristics of the light modulator 32. Further, even when the light source is replaced, there is an advantage that an LUT corresponding to a change in the light emission characteristics of the light source can be created.

5 to 8 are flowcharts showing a processing flow for creating the gamma correction LUT and the color unevenness correction LUT by the image adjustment apparatus 50. The LUT creation process will be described with reference to these drawings.
First, as shown in FIG. 5, a color characteristic measurement process is executed by the surface measuring device 40 (step S1). Details of the color characteristic measurement processing will be described with reference to the flowchart shown in FIG.
In the color characteristic measurement process, the raster image of each gradation is displayed on the screen SC as the projection image P by the projector 1 (step S11). The surface measuring device 40 captures a raster image projected as the projection image P, and generates in-plane two-dimensional distribution image data of X, Y, and Z tristimulus values from the captured image data. The surface measuring device 40 generates data D5 indicating the tone color characteristics (VT characteristics) of the raster image projected on the screen SC from the generated in-plane two-dimensional distribution image data, and outputs the data D5 to the image adjusting device 50. (Step S12). The surface measuring apparatus 40 repeatedly executes the processes of steps S11 and S12 for all the preset gradation values (step S13), and when the process is completed for all the gradation values, the process returns to step S2 of FIG.

Next, a division pattern is selected (step S2). In gamma correction LUT creation processing and color unevenness correction LUT creation processing in steps S5 and S6 described later, whether to create an LUT for one screen or an LUT for multiple screens is selected. When creation of a multi-screen LUT is selected, the number of screen divisions that divide the display area of the liquid crystal panel 321 is also selected. For example, the number of divisions such as 2-screen division and 4-screen division is selected. Step S2
The division pattern may be selected by the user by operating the operation unit 55. The gamma correction LUT creation unit 53 and the color unevenness correction LUT creation unit 54 may select the division pattern based on information set in advance. It may be selected automatically.

Next, a target display area is selected (step S3). The display area of the liquid crystal panel 321 to be corrected by the LUT created in the gamma correction LUT creation process and the color unevenness correction LUT creation process in steps S5 and S6 described later is selected. The display area may be selected by the user by operating the operation unit 55, or the gamma correction LUT creation unit 53 and the color unevenness correction LUT creation unit 54 may be selected based on information set in advance. It may be selected automatically.

Next, a color mode is selected (step S4). It is selected which color mode corresponds to the LUT created in the gamma correction LUT creation process in step S5 described later and the color unevenness correction LUT creation process in S6. The color mode may be selected by the user by operating the operation unit 55, or the gamma correction LUT creation unit 53 and the color unevenness correction LUT creation unit 54 may be selected based on information set in advance. It may be selected automatically.

Next, the gamma correction target calculation unit 51 and the gamma correction LUT creation unit 53 perform gamma correction L
A UT is created (step S5). The details of the procedure for creating the gamma correction LUT will be described with reference to the flowchart shown in FIG.
First, the target value (target XY) of the gamma correction of each gradation is performed by the gamma correction target calculation unit 51.
Z value) is calculated (step S21). The gamma correction target calculation unit 51 obtains a target XYZ value for creating the gamma correction LUT based on the target color space (for example, sRGB) and the color characteristics included in the data D5.

Subsequently, the gamma correction LUT creation unit 53 repeatedly executes matrix calculation based on the target XYZ values calculated by the gamma correction target calculation unit 51, and each gradation value between black (minimum gradation) and white (maximum gradation). An input RGB value for realizing is obtained (step S22). The gamma correction LUT creation unit 53 determines whether or not this calculation has been executed for all gradations (step S23), and determines that input RGB values are not obtained for all gradations (step S2).
3 / NO), the process returns to step S21. If the gamma correction LUT creation unit 53 determines that the input RGB values have been obtained for all the gradations (step S23 / YES), the gamma correction LUT
The UT creation process is terminated.

Next, an uneven color correction LUT is created (step S6). Details of the color unevenness correction LUT creation process will be described with reference to the flowchart shown in FIG.
First, the target value (target XYZ value) of each position and each gradation is calculated by the color unevenness correction target calculation unit 52 (step S31). The color unevenness correction target calculation unit 52 determines the target XYZ values for creating the color unevenness correction LUT for each pixel of the data D5 based on the target color space (for example, sRGB) and the color characteristics included in the data D5. Obtained for each gradation.

The uneven color correction LUT creation unit 54 generates the target X obtained by the uneven color correction target calculation unit 52.
A matrix operation is executed based on the YZ value, and an input RGB value that realizes the target XYZ value is searched for each pixel and each gradation (step S32). The color unevenness correction LUT creation unit 54
A difference between the searched result and the gamma correction LUT created by the gamma correction LUT creation unit 53 in the gamma correction LUT creation process is obtained, and the difference is stored as a color unevenness correction LUT (step S).
33). The color unevenness correction LUT creation unit 54 determines whether or not the processing of steps S31 to S33 has been executed for all the pixels and all the gradations of the data D5 (step S34). When it is determined that the processing in steps S31 to S33 has not been executed for all pixels and all gradations of the data D5 (step S34 / NO), the color unevenness correction LUT creation unit 54 performs step S34.
The processes of 31 to S33 are repeated. Further, when it is determined that the processing in steps S31 to S33 has been executed for all the pixels and all the gradations of the data D5 (step S34 / YES), the color unevenness correction LUT creation unit 54 creates color unevenness correction LUT. End.

FIG. 9A shows, as a solid line, an example of color correction characteristics by correction using a gamma correction LUT when the two-screen display mode is selected as the display mode and the color priority mode is selected as the color mode. The color correction characteristic shown in FIG. 9A is the color correction characteristic of the left display area (first display area) of the two-screen split display. Note that the characteristic indicated by the broken line in FIG. 9A indicates the color characteristic before correction by the gamma correction LUT. FIG. 9B shows an example of the color correction characteristic by the correction using the gamma correction LUT when the two-screen display is selected as the display mode and the brightness priority mode is selected as the color mode. The color correction characteristic shown in FIG. 9B is the color correction characteristic of the right display area (second display area) of the two-screen split display. The characteristic indicated by the broken line in FIG.
The color characteristics before correction by the gamma correction LUT are shown.

FIG. 10A shows uneven characteristics of the liquid crystal panel 321 included in the projector 1 (when no correction is performed).
An example is shown by a broken line. The horizontal axis in FIG. 10A indicates the pixel position in the horizontal direction (horizontal direction) of the liquid crystal panel 321, and the vertical axis indicates luminance. As shown by a broken line in FIG. 10A, the unevenness characteristic of the liquid crystal panel 321 tends to be high in luminance on the left side of the liquid crystal panel 321 and low in luminance on the right side. For this reason, when an image is displayed on the entire liquid crystal panel 321, the projected image projected on the screen SC has a luminance at the left end of the projected image that is higher than the luminance at the right end of the projected image and to the left of the center of the projected image. The brightness becomes maximum at the position shifted to.

In general, it is known that an image displayed by a display device has a natural brightness when the brightness of the central part is high and the brightness gradually decreases toward the periphery. ing. From this point of view, display quality can be improved by correcting the image displayed on the liquid crystal panel 321 having the uneven characteristic shown by the broken line in FIG. 10A in accordance with the correction characteristic shown by the solid line in FIG. Can do. In the example of FIG. 10A, when correcting the luminance, the liquid crystal panel 321 is used.
Since the luminance at the right end in the horizontal direction is low, correction is performed based on the luminance at the right end.
This is because when correcting the luminance, the luminance cannot be corrected higher than the luminance indicated by the unevenness characteristic. For example, when correcting the luminance as shown by a one-dot chain line in FIG. 10A using the luminance at the left end of the liquid crystal panel 321 as a reference, it is necessary to make the luminance at the right end of the liquid crystal panel 321 higher than the luminance characteristic unevenness. Cannot be realized.

FIGS. 10B and 10C show the correction characteristics when the correction characteristics in the single-screen display mode indicated by the solid line in FIG. 10A are used as they are for the correction characteristics in the two-screen display mode. FIG. 10 (B)
Indicates the correction characteristic of the left display area of the liquid crystal panel 321 obtained by dividing the correction characteristic of the single-screen display mode into two. FIG. 10C shows a liquid crystal panel 3 in which the correction characteristic of the single screen display mode is divided into two.
The correction characteristic of the right side display area of 21 is shown. When the image data D1 is corrected in accordance with the correction characteristics shown in FIG. 10B, the luminance at the left end is the lowest and the luminance at the right end is the highest in the projected image displayed on the left side of the screen SC. Further, when the image data D1 is corrected according to the correction characteristics shown in FIG. 10C, the luminance at the left end is the highest and the luminance at the right end is the lowest in the projected image displayed on the right side of the screen SC.

11A and 11B, the divided liquid crystal panel 321 in the two-screen display mode.
The correction characteristics when the correction LUT is created for each display area and the color unevenness characteristics of the liquid crystal panel 321 are corrected are indicated by solid lines. FIG. 11A shows the liquid crystal panel 3 in the two-screen display mode.
The left display area (first display area) 21 has a correction characteristic indicated by a solid line, and FIG. 11B shows the correction characteristic of the right display area (second display area) of the liquid crystal panel 321 by a solid line. . In FIGS. 11A and 11B, the color unevenness characteristic of the liquid crystal panel 321 when no correction is performed is indicated by a one-dot chain line. In FIG. 11A, the correction characteristic obtained by dividing the correction characteristic of the single-screen display mode shown in FIG. Further, in FIG. 11B, the correction characteristic obtained by dividing the correction characteristic in the single screen display mode shown in FIG.

As is apparent from a comparison between the correction characteristic indicated by the solid line in FIG. 11A and the correction characteristic indicated by the broken line, the correction characteristic of the left display area of the liquid crystal panel 321 indicated by the solid line is the same as that of the one-screen display mode indicated by the broken line. The luminance is higher than the correction characteristic obtained by dividing the correction characteristic into two. The correction characteristic of the left display area of the liquid crystal panel 321 indicated by a solid line in FIG. 11A is based on the luminance at the left end where the luminance is the lowest in the non-correction color unevenness characteristic of the liquid crystal panel 321 indicated by the alternate long and short dash line (minimum). The luminance is corrected as (luminance). For this reason, the correction characteristic of the left display area of the liquid crystal panel 321 can be higher in luminance than the correction characteristic obtained by dividing the correction characteristic of the single-screen display mode into two. Therefore,
It is possible to suppress a decrease in luminance of the image projected on the screen SC.
Further, the correction characteristic of the right display area of the liquid crystal panel 321 indicated by a solid line in FIG. 11B can also have a slightly higher luminance than the correction characteristic obtained by dividing the correction characteristic of the one-screen display mode indicated by the broken line into two. . For this reason, also in the right side display area of the liquid crystal panel 321, the brightness | luminance fall of the image projected on the screen SC can be suppressed.

Next, the processing procedure of the projector 1 will be described with reference to the flowchart shown in FIG. First, the display control unit 13 determines whether or not a display mode selection has been input (step S51). The display modes include a single screen display mode and a multi-screen display mode. When the selection of the display mode is input (step S51 / YES), the display control unit 13 determines whether or not the selected display mode is the multi-screen display mode (step S52). In the case of negative determination (step S52 / NO), the display control unit 13 determines that it is the single screen display mode,
The process proceeds to step S55 (step S55). In the case of an affirmative determination (step S
52 / YES), it is determined whether or not a division pattern setting has been input (step S53).
Examples of the division pattern include 2-screen division and 4-screen division. In the case of a negative determination (step S53 / NO), the display control unit 13 displays a division pattern setting request on the operation display unit 12, and waits for a division pattern setting input. If the determination is affirmative (step S53 / YES), the display control unit 13 determines whether there is a selection of an image to be displayed in each display area of the liquid crystal panel 321 (step S54). In the case of negative determination (step S54)
/ NO), the display control unit 13 displays the identification information of each image supply device 2 connected to the projector 1 on the operation display unit 12 and also displays an image schematically showing the display area of the liquid crystal panel 321. . The image schematically showing each display area of the liquid crystal panel 321 is, for example, an image in which the display area is divided in accordance with the input division pattern setting. The user inputs a selection of a display area for displaying an image supplied from the image supply device 2 from the operation display unit 12 while viewing the display on the operation display unit 12. The display control unit 13 creates display area setting information in which the identification information of the image supply device 2 and the identification information for identifying the display area of the liquid crystal panel 321 are associated with each other according to the input of the operation display unit 12. The display area setting information is the image supply device 2.
The identification information of the image data D1 supplied from the image supply device 2 may be used instead of the identification information. In addition, as identification information for identifying the display area of the liquid crystal panel 321, a coordinate value on the liquid crystal panel 321 indicating the existence range of each display area can be used.
The display control unit 13 selects the input display mode selection information and the division pattern setting information when the display mode is the multi-screen display mode, and selects the image correction unit 21, the gamma correction LUT selection unit 27, and the uneven color correction LUT selection. To the unit 28. Further, the display control unit 13 displays display area setting information in which the identification information of the image supply device 2 is associated with the identification information for identifying the display area of the liquid crystal panel 321 in the image correction unit 21 and the image composition unit 24. Output.

The display control unit 13 determines whether or not the image data D1 supplied from the image supply device 2 has been input via the I / F unit 11 (step S55). In the case of negative determination (step S55)
/ NO), the display control unit 13 stands by until the image data D1 is input. If the determination is affirmative (step S55 / YES), the display control unit 13 determines the attribute of the input image data D1 (step S56). The display control unit 13 determines the attributes of the image data D1, such as the resolution of the input image data D1, whether it is a still image or a moving image, and the frame rate in the case of a moving image. The display control unit 13 outputs attributes including the resolution of the input image data D1 to the image correction unit 21.

Next, the display control unit 13 selects a color mode for projecting the image data D1 based on the determined attribute. The display control unit 13 displays the selected color mode on the operation display unit 12 of the projector 1 as a recommended color mode, and accepts a selection input by the operation display unit 12 (step S57). When the display control unit 13 inputs color mode selection from the operation display unit 12 (step S57 / YES), the input color mode selection information is output to the gamma correction LUT selection unit 27 and the color unevenness correction LUT selection unit 28. . Specifically, when the operation display unit 12 receives a recommended color mode selection input from the operation display unit 12, the display control unit 13 uses the selected recommended color mode information as color mode selection information to perform gamma correction L.
The data is output to the UT selection unit 27 and the color unevenness correction LUT selection unit 28. In addition, the display control unit 13
When a color mode different from the recommended color mode is selected by the operation display unit 12,
The selection information of the selected color mode is sent to the gamma correction LUT selection unit 27 and the uneven color correction LUT.
The data is output to the selection unit 28.

When the image data D <b> 1 is input via the I / F unit 11, the image correction unit 21 first determines the display mode set for the projector 1 based on display mode selection information input from the display control unit 13. To do. When the display mode is the multi-screen display mode, the image correction unit 21
Based on the division pattern setting information input from the display control unit 13, the resolution of each display area is acquired. The image correction unit 21 refers to the display area setting information input from the display control unit 13 and acquires information on the display area of the liquid crystal panel 321 that displays an image based on the input image data D1. Next, the image correction unit 21 refers to a memory (not shown) based on the acquired information on the display area, and acquires information on the resolution of the corresponding display area. Image correction unit 2
1 acquires the resolution information of the display area, and performs a scaling process for matching the resolution of the image data D1 with the resolution of the acquired display area. Further, the image correction unit 21 performs image correction such as noise removal, frame interpolation processing, and processing for converting the frame rate of the image data D1 on the image data D1 based on the attribute input from the display control unit 13. This is performed (step S58). Further, the image correction unit 21 performs distortion correction processing for correcting trapezoidal distortion and barrel distortion, processing for adjusting image quality such as brightness, contrast, sharpness, and the like on the image data D1 based on the attribute ( Step S58). The image correction unit 21 corrects the corrected image data D1.
Is output to the gamma correction execution unit 22.

The gamma correction LUT selection unit 27 receives display mode selection information, division pattern setting information, and color mode selection information from the display control unit 13. The gamma correction LUT selection unit 27 selects a gamma correction LUT based on the input information, and outputs a selection signal of the selected gamma correction LUT to the gamma correction LUT storage unit 25. The gamma correction LUT storage unit 25 outputs a corresponding gamma correction LUT to the gamma correction execution unit 22 in accordance with the selection signal input from the gamma correction LUT selection unit 27.
The gamma correction execution unit 22 receives the gamma correction LU input from the gamma correction LUT storage unit 25.
T is stored in the storage element, and gamma correction is performed on the image data D1 input from the image correction unit 21 based on the gamma correction LUT stored in the storage element (step S59).

The color unevenness correction LUT selection unit 28 receives display mode selection information, division pattern setting information, and color mode selection information from the display control unit 13. The color unevenness correction LUT selection unit 28 selects the color unevenness correction LUT based on the input information, and outputs a selection signal of the selected color unevenness correction LUT to the color unevenness correction LUT storage unit 26. The uneven color correction LUT storage unit 26 outputs the corresponding uneven color correction LUT to the uneven color correction execution unit 23 according to the selection signal input from the uneven color correction LUT selection unit 28.
The color unevenness correction execution unit 23 receives the color unevenness correction LU input from the color unevenness correction LUT storage unit 26.
T is stored in the storage element, and the image data D1 input from the gamma correction execution unit 22 is
Color unevenness correction is executed based on the stored color unevenness correction LUT (step S60).

The image composition unit 24 develops each image data D1 input from the color unevenness correction execution unit 23 in a corresponding area of the frame memory according to the display area setting information. The image composition unit 24
When image data for one frame is developed in the frame memory, the developed image for each frame is output to the modulation control unit 35 of the display unit 30 as an image signal D3. The display unit 30
The projection image P is projected on the screen SC based on the image signal D3 output from the image processing unit 20 (step S61).

As described above in detail, according to the present embodiment, the gamma correction LUT and the color unevenness correction LUT for correcting image data according to the single screen display mode that is the display mode of the projector 1 and the multi-screen display mode are provided. Prepare for each. Then, a correction LUT corresponding to the display mode of the projector 1 is selected, and gamma correction and color unevenness correction of the image data are performed.
Therefore, it is possible to improve the display quality of the projected image in each display mode.

In this embodiment, the correction LUT for the multi-screen display mode is created separately from the correction LUT for the single-screen display mode. Thereby, the screen SC is divided into a plurality of display areas, and projection images based on the image data supplied from the plurality of image supply apparatuses 2 are arranged in the respective display areas and displayed in the multi-screen display mode. A decrease can be prevented.

The projector 1 according to the embodiment includes a display unit 30, a display control unit 13, and a gamma correction execution unit 22.
And an uneven color correction execution unit 23. The display unit 30 is a liquid crystal panel 321 that displays an image.
Is provided. The display control unit 13 switches between one-screen display in which one display area is arranged on the liquid crystal panel 321 and multi-screen display in which the liquid crystal panel 321 is divided into a plurality of display areas, and displays an image for each display area. The gamma correction execution unit 22 and the color unevenness correction execution unit 23 correct the image for each display area corresponding to the arrangement state of the display area in the liquid crystal panel 321. Therefore,
Even when the screen display is switched between the single-screen display and the multi-screen display, the image corresponding to the arrangement state in the display area of the liquid crystal panel 321 can be corrected to improve the display quality in each display mode. .

Further, the gamma correction execution unit 22 and the uneven color correction execution unit 23 correct the image based on the display characteristics of the liquid crystal panel 321. Therefore, correction according to the display characteristics of the liquid crystal panel 321 can be performed to improve display quality.

In addition, the projector 1 includes an image correction unit 21 that adjusts an image for each display area and causes the display unit 30 to display the adjusted image. The gamma correction execution unit 22 and the color unevenness correction execution unit 23 correct the image adjusted by the image correction unit 21 according to the arrangement state of the display area. Therefore, the display quality can be improved by performing correction corresponding to the arrangement state of the display area on the image.

Further, the projector 1 according to the present embodiment includes a gamma correction LUT storage unit 25 and a color unevenness correction LUT storage unit 26 that store correction data in association with the arrangement state of the display area. The gamma correction execution unit 22 acquires correction data corresponding to the arrangement state of the display area from the gamma correction LUT storage unit 25, and corrects the image based on the acquired correction data. Similarly, the uneven color correction execution unit 23 acquires correction data corresponding to the arrangement state of the display area from the uneven color correction LUT storage unit 26, and corrects the image based on the acquired correction data. Accordingly, it is possible to improve the display quality by correcting the image with the correction data corresponding to the arrangement state of the display area.

Further, the gamma correction LUT storage unit 25 stores a gamma correction LUT in which correction data corresponding to the arrangement state of the display area on the liquid crystal panel 321 and the setting (color mode) regarding the display quality of the image is registered. The color unevenness correction LUT storage unit 26 stores a color unevenness correction LUT in which correction data corresponding to the display area arrangement state on the liquid crystal panel 321 and the setting (color mode) related to the display quality of the image is registered.
The gamma correction execution unit 22 and the color unevenness correction execution unit 23 display the liquid crystal panel 32 when displaying images in the first display area and the second display area of the liquid crystal panel 321 in multi-screen display.
The image is corrected using correction data corresponding to the display position of the first display area in 1 and the setting (color mode) related to the display image quality of the image displayed in the first display area. In addition, the gamma correction execution unit 22 and the color unevenness correction execution unit 23 perform the display position of the second display area on the liquid crystal panel 321 and the setting (color mode) related to the display quality of the image displayed in the second display area. The image is corrected using the corresponding correction data. Therefore, it is possible to correct the image with the correction data according to the arrangement state of the display area and the setting (color mode) relating to the display image quality of the image, thereby improving the display quality.

In addition, the gamma correction LUT storage unit 25 corresponds to gamma correction data used for gamma correction of an image as correction data according to the arrangement state of the display area and the setting related to the image quality (color mode) displayed on the display panel. A plurality is stored. Therefore, gamma correction is performed using gamma correction data according to the arrangement state of the display area and the setting relating to the display quality of the image,
Display quality can be improved.

In addition, the color unevenness correction LUT storage unit 26 sets, as correction data, color unevenness correction data used for color unevenness correction of an image regarding the arrangement state of the display area and the image quality of the image displayed on the display panel (color mode). Are stored in association with each other. Accordingly, it is possible to perform color unevenness correction using color unevenness correction data according to the arrangement state of the display area and the setting relating to the display quality of the image, thereby improving display quality.

In addition, this invention is not restricted to the structure of the said embodiment, In the range which does not deviate from the summary, it can be implemented in a various aspect. For example, the light modulator 32 is
The configuration is not limited to using three transmissive liquid crystal panels, and for example, three reflective liquid crystal panels may be used. Further, the light modulation unit 32 may be configured by a system in which one liquid crystal panel and a color wheel are combined. When the light modulation unit 32 includes one liquid crystal panel 321, the image processing unit 20 includes a set of LUTs common to RGB colors, that is, a full display gamma correction LUT, a partial display gamma correction LUT, A color unevenness correction LUT for full display and a color unevenness correction LUT for partial display may be used. Alternatively, the LUT set may be stored for each color, and the LUT may be selected in accordance with the color displayed on the liquid crystal panel 321. When the light modulation unit 32 includes three liquid crystal panels, the image processing unit 20 may use a set of LUTs in common for the three liquid crystal panels, or select a different LUT for each liquid crystal panel. May be.
The light modulation unit 32 may be configured by a system using three digital mirror devices (DMD), a DMD system combining one digital mirror device and a color wheel, or the like. When only one liquid crystal panel or DMD is used as the light modulation unit 32, a member corresponding to a composite optical system such as a cross dichroic prism is unnecessary. In addition to the liquid crystal panel and the DMD, the light modulation unit 32 that can modulate the light emitted from the light source can be employed without any problem.

The display area setting information can also be set by the image supply device 2. As shown in FIG. 3, in the case of a configuration in which a plurality of image supply devices 2A, 2B, 2C, 2D are connected to the projector 1, display is performed by any one selected from the image supply devices 2A, 2B, 2C, 2D. Area setting information may be set. When the display area setting information is set by each of the image supply devices 2A, 2B, 2C, and 2D, the image supplied by each of the image supply devices 2A, 2B, 2C, and 2D is displayed in which display area of the liquid crystal panel 321. Each image supply apparatus 2A determines whether to display the image.
, 2B, 2C, 2D.

Moreover, each function part shown in FIG.1 and FIG.4 shows a functional structure, Comprising: A specific mounting form is not restrict | limited in particular. That is, it is not always necessary to mount hardware corresponding to each function unit individually, and it is of course possible to adopt a configuration in which the functions of a plurality of function units are realized by one processor executing a program. In addition, in the above embodiment, a part of the function realized by software may be realized by hardware, or a part of the function realized by hardware may be realized by software. In addition, other specific detailed configurations of the projector 1 can be arbitrarily changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Image supply apparatus, 13 ... Display control part, 20 ... Image processing part, 21
... image correction unit (image processing unit), 22 ... gamma correction execution unit (correction unit), 23 ... color unevenness correction execution unit (correction unit), 24 ... image composition unit, 25 ... gamma correction LUT storage unit (storage unit) , 26 ...
Correction LUT storage unit (storage unit), 27... Gamma correction LUT selection unit, 28.
Selection unit 30 ... Display unit 40 ... Surface measuring device 50 ... Image adjustment device 51 ... Gamma correction target calculation unit 52 ... Correction target calculation unit 53 ... Gamma correction LUT creation unit 54 ... Color unevenness correction LU
T creation unit, 321... Liquid crystal panel (display panel).

Claims (8)

A display unit for displaying an image on the display panel;
A display control unit that switches between one-screen display in which one display area is arranged on the display panel and multi-screen display in which the display panel is divided into a plurality of display areas, and displays an image for each display area;
A correction unit that corrects an image for each display area in accordance with the arrangement state of the display area on the display panel;
A display device comprising: The display device according to claim 1, wherein the correction unit corrects an image based on display characteristics of the display panel. An image processing unit that adjusts an image for each display area and displays the adjusted image on the display unit,
The correction unit corrects the image adjusted by the image processing unit in accordance with the arrangement state of the display area;
The display device according to claim 1 or 2. A storage unit that stores correction data in association with the arrangement state of the display area;
The correction unit acquires correction data corresponding to an arrangement state of the display area from the storage unit, and corrects an image based on the acquired correction data;
The display device according to claim 1, wherein: The storage unit stores correction data in association with an arrangement state of the display area and a setting relating to a display quality of an image,
The correction unit, in the multi-screen display, when displaying an image on the first display area and the second display area of the display panel, the display position of the first display area on the display panel, The image is corrected using correction data corresponding to the display quality setting of the image displayed in the first display area, the display position of the second display area on the display panel, and the second display area Correcting the image using correction data corresponding to a display quality setting of an image to be displayed on the screen,
The display device according to claim 4. The storage unit stores a plurality of gamma correction data used for gamma correction of an image as the correction data in association with the arrangement state of the display area and the setting related to the display image quality,
The display device according to claim 5. The storage unit stores, as the correction data, a plurality of color unevenness correction data used for color unevenness correction of an image in association with an arrangement state of the display area and a setting related to the display image quality;
The display device according to claim 5 or 6. A control method of a display device including a display unit that displays an image on a display panel,
Switching between one-screen display in which one display area is arranged on the display panel and multi-screen display in which the display panel is divided into a plurality of display areas, and displaying an image for each display area,
Corresponding to the arrangement state of the display area on the display panel, correcting the image for each display area;
A control method of a display device characterized by the above.

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