JP2006165949A - Projector system and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector system and a projector for easily switching a stack projection video of high luminance and a wide video of high resolution. <P>SOLUTION: This projector system is provided with a master projector 201 for projecting a master video that is the reference of a composite video and a slave projector 202 electrically connected to the master projector 201 for projecting a slave video to be compounded with the master video so that the composite video can be formed. The composite video includes a stack video, where the master video and the slave video are superimposed and a wide video, where the master device and the slave video are lined up, and the master projector 201 projects the master video that is the reference of one composite video selected from among the plurality of composite videos, and transmits display mode information that shows the selected composite video to a slave projector. The slave projector projects the slave video, based on the display mode information from the master projector. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector system and a projector that project light by modulating light emitted from a light source unit such as a lamp in accordance with a video signal that defines a video.

For example, a projector installed in a multipurpose hall such as a hotel having a large screen of about 200 to 300 inches can project a brighter image than usual in order to uniformly illuminate a large screen. What has brightness is desirable. Such a high-brightness projector is expensive enough to purchase a plurality of projectors having a brightness of about 1000 to 2500 lumens.
In order to achieve a bright projected image on a large screen with an inexpensive configuration, for example, a method of superimposing and projecting the same image on the same screen using a plurality of projectors having normal luminance is known. For example, Patent Document 1 discloses a projector system that stacks and projects the same image on the same screen using a plurality of projectors.

Projectors used in large venues such as multipurpose halls are mainly used for business purposes such as projecting presentation images including graphs from PCs (personal computers) at conferences, or movie images for new movie projection events, etc. It is roughly divided into viewing applications that project images. In the case of business use, it is possible to obtain a bright projected image by stacking and projecting images having an aspect ratio of 4: 3 on a PC screen with a plurality of projectors having a resolution of XGA (1024 × 768) that can be obtained at low cost. Is possible.
A case of projecting a movie image with a wide image having an aspect ratio of 16: 9 for viewing from a DVD (Digital Versatile Disk) player, for example, will be described with reference to FIG. FIG. 8 is a schematic diagram of wide image projection by a plurality of conventional projectors. The two projectors 61 and 62 are supplied with the same video signal from the DVD player 60 and project a video V10 having an aspect ratio of 4: 3 on the screen SC. The composite video V10 has the horizontal width W of the video V10 having an aspect ratio of 4: 3 as a reference “16”, the vertical direction H is provided with the black screen B in the upper and lower portions of the vertical direction H, and the ratio is reduced to “9”. As a result, a small 16: 9 WSVGA (1024 × 600) wide image is created in a 4: 3 screen configuration.

JP 2000-338941 A

  However, in order to perform stack projection with a plurality of projectors, it has been necessary to manually set the size, focus, stack state, and the like of each projector image over time. In addition, although it is possible to project a 16: 9 image with the configuration of FIG. 8, since the black screen B is required, the resolution corresponding to the area of the black screen B is reduced, resulting in a high resolution. It was difficult to obtain a wide video of WXGA (1280 × 768). Furthermore, since the projection is performed on a large screen, the low resolution is conspicuous when the pixels are enlarged. In addition, a dedicated projector capable of obtaining a high resolution with a wide image with an aspect ratio of 16: 9 is more expensive than a general projector with an aspect ratio of 4: 3, and a new dedicated expensive projector is used for viewing purposes. Purchasing was not efficient.

  In order to solve such problems, an object of the present invention is to provide a projector system and a projector that can easily switch between a high-brightness stack projection image and a high-resolution wide image.

  To achieve the above object, according to the projector system of the present invention, a projector system that forms a composite image by combining images projected by a plurality of projectors, wherein a master image serving as a reference for the composite image is obtained. A master projector for projecting and a slave projector for projecting a slave video that is electrically connected to the master projector and forms a composite video by combining with the master video are superimposed on the master video and the slave video. The master projector projects and selects the master video that serves as a reference for one composite video selected from a plurality of composite video, and the stack video and the wide video obtained by arranging the master video and the slave video. Display mode information indicating the combined video Feeding the projector, the slave projectors on the basis of the display mode information from the master projector, characterized by projecting the slave images.

According to this configuration, the composite video projected by the projector system of the present invention includes a stack video in which the master video and the slave video are superimposed, and a wide video in which the master video and the slave video are arranged. Therefore, since the stack image is a superimposition of the projection images of the master and slave projectors, the brightness of the composite image is obtained by adding the brightness of the slave image to the brightness of the master image. it can.
In addition, because the wide video is the projection image of the master and slave projectors arranged side by side, the resolution of the composite video is the resolution of the master video plus the resolution of the slave video, and high resolution can be obtained. .
Furthermore, since one composite image selected from a plurality of composite images is projected, the composite image can be switched.

Therefore, the projector system of the present invention can project a high-brightness stack image, but unlike the conventional projector system in which it is difficult to obtain a high-resolution wide image with the same system, It is possible to switch and project a luminance stack projection image and a high-resolution wide image.
Further, since the slave projector projects the slave video based on the display mode information from the master projector, a desired composite video can be obtained by selecting the composite video to be projected to the master projector.
Therefore, it is possible to provide a projector system that can easily switch between a high-brightness stack projection image and a high-resolution wide image.

  A projector according to the present invention forms a composite image by combining images projected by a plurality of projectors, and a master projector that projects a master image that serves as a reference for the composite image, and a composite image by superimposing the master image. A projector capable of operating as a master projector of a projector system including a slave projector that projects a slave image that generates a wide image as a composite image by generating a stack image of An operation receiving unit that outputs an operation signal corresponding to the instructed composite image when an operation for instructing the formation of the composite image is performed, and setting information regarding the size, projection position, and focus of the master image for each of the plurality of composite images Storage unit for storing A communication unit for transmitting and receiving information including display mode information indicating a composite image instructed, a projection lens composed of a plurality of lenses for projecting a master image, zoom and projection position of the projection lens In accordance with the operation signal from the projection lens adjustment unit including a plurality of actuators for adjusting the focus and the operation receiving unit, the setting information related to the master image of the instructed composite image is allocated from the storage unit, and in accordance with the allocated setting information A control unit that outputs an adjustment command to the projection lens adjustment unit, and the control unit sends display mode information to the slave projector when the adjustment command is output.

According to this configuration, the control unit of the projector allocates the setting information regarding the master image of the instructed composite image from the storage unit in accordance with the operation signal from the operation receiving unit, and adjusts the projection lens according to the allocated setting information. Since the adjustment command is output to the control unit and the display mode information is sent to the slave projector, the master image is projected along with the instructed composite video setting information, and the slave projector projects the instructed composite video slave image. Control to do.
Therefore, it is possible to provide a projector that functions as a master projector that projects a master video that serves as a reference for the selected composite video and controls the projection of the slave video of the slave projector.

  A projector according to the present invention forms a composite image by combining images projected by a plurality of projectors, and a master projector that projects a master image that serves as a reference for the composite image, and a composite image by superimposing the master image. A projector that can operate as a slave projector of a projector system including a slave projector that projects a slave image that generates a stacked image of or a slave image that generates a wide image as a composite image by aligning with a master image A storage unit that stores setting information regarding the size, projection position, and focus of the slave image for each of the plurality of composite images, and information including display mode information indicating the type of the composite image to be projected with the master projector Communication unit and slave video In accordance with the display mode information from the master lens, a projection lens composed of a plurality of lenses for projection, a projection lens adjustment unit including a plurality of actuators for adjusting the zoom, projection position, and focus of the projection lens. And a control unit that assigns setting information related to the slave video of the composite video that has been assigned from the storage unit and outputs an adjustment command to the projection lens adjustment unit in accordance with the assigned setting information.

According to this configuration, the control unit of the projector allocates the setting information related to the slave video of the instructed composite video from the storage unit according to the display mode information from the master projector, and adjusts the projection lens according to the allocated setting information. Since the adjustment command is output to the unit, the slave image of the instructed composite image is projected along the setting information in accordance with the display mode information from the master projector.
Accordingly, it is possible to provide a projector that functions as a slave projector that projects a slave video for constructing a selected composite video according to the control of the master projector.

  According to the projector that functions as the master projector according to the present invention, the projector further stores setting information related to the shape of the master video in the storage unit and corrects the shape of the video represented by the input video signal. It is preferable to further include a video signal processing unit that performs processing on the video signal.

According to this configuration, since the projector further includes the video signal processing unit that performs processing on the video signal to correct the shape of the video represented by the video signal, in addition to the video size, the projection position, and the focus, The shape can also be corrected. Therefore, it is possible to project a master image having a shape close to the image defined in the image signal.
Therefore, it is possible to provide a projector that functions as a master projector capable of projecting an image faithful to the image signal.

  According to the projector that functions as the slave projector according to the present invention, the projector further stores setting information related to the shape of the slave video in the storage unit and corrects the shape of the video represented by the input video signal. It is preferable to further include a video signal processing unit that performs processing on the video signal.

According to this configuration, since the projector further includes the video signal processing unit that performs processing on the video signal to correct the shape of the video represented by the video signal, in addition to the video size, the projection position, and the focus, The shape can also be corrected. Therefore, it is possible to project a slave image having a shape close to the image defined in the image signal.
Therefore, it is possible to provide a projector that functions as a slave projector capable of projecting an image faithful to the video signal.

  A projector that functions as a master projector according to the present invention is an area sensor for capturing a projected master image, and an image that analyzes the image captured by the area sensor and detects the size, shape, and focus of the master image. It is preferable to further include an analysis unit.

According to this configuration, the projector includes the area sensor and the image analysis unit that analyzes the image captured by the area sensor and detects the size, shape, and focus of the master image. The state of the video can be detected accurately.
Therefore, it is possible to adjust the projected master video so that it matches the setting information of the master video.
Therefore, it is possible to provide a projector that functions as a master projector capable of projecting an image more faithful to the image signal.

  A projector that functions as a slave projector according to the present invention is an area sensor for capturing a projected slave image, and an image that analyzes the image captured by the area sensor and detects the size, shape, and focus of the slave image It is preferable to further include an analysis unit.

According to this configuration, the projector includes the area sensor and the image analysis unit that analyzes the image captured by the area sensor and detects the size, shape, and focus of the slave image. The state of the video can be detected accurately.
Therefore, it is possible to adjust the projected slave video so as to match the setting information of the slave video.
Therefore, it is possible to provide a projector that functions as a slave projector capable of projecting an image more faithful to the image signal.

  The projector system according to the present invention is preferably composed of two projectors in which the projector functioning as the master projector is a master projector and the projector functioning as the slave projector is a slave projector.

According to this configuration, the projector system is a simple configuration because the projector system includes two projectors, a master projector and a slave projector.
In addition, each projector has substantially the same configuration as an inexpensive projector that is mass-produced, and therefore can be manufactured at a low cost.
Therefore, it is possible to provide a projector system having a simple configuration that can switch between a high-brightness stack projection image and a high-resolution wide image.

  According to the projector that functions as the master projector according to the present invention, the storage unit further stores setting information related to the size, projection position, and focus of the slave image for each of the plurality of composite images, and the operation receiving unit serves as the master projector. When the master-slave switching operation for switching between the function of the slave projector and the function as the slave projector is performed, an operation signal including master-slave switching operation information is output, and the control unit receives the operation signal from the operation receiving unit. It is preferable to stop the function and project the slave video along the display mode information of the slave video input to the communication unit.

According to this configuration, since the control unit of the projector projects the slave video along the display mode information input to the communication unit, the projector functions as a slave projector.
Therefore, it is possible to provide a projector capable of selecting a function as a master projector and a function as a slave projector.

  According to the projector system of the present invention, the master video and the slave video each have an aspect ratio of 4: 3, the stacked video has an aspect ratio of 4: 3, and the wide video has an aspect ratio of 16: 9. It is preferable.

According to this configuration, the master projector and the slave projector can be configured with an inexpensive general-purpose projector having an aspect ratio of 4: 3 as a base model.
In addition, a high-brightness stack projection image with an aspect ratio of 4: 3 required for business use and a high-resolution wide image with an aspect ratio of 16: 9 required for viewing use can be switched and projected with one projector system. it can.
Therefore, it is possible to provide a projector system that can switch between a high-brightness stack projection image and a high-resolution wide image with a simple configuration.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(Embodiment 1)
<Outline of projector system>
FIG. 1 is an installation schematic diagram of a projector system according to an embodiment of the present invention.
The projector system 200 includes a master projector 201 and a slave projector 202. In the following description, the video projected by the master projector 201 is called a master video, the video projected by the slave projector 202 is called a slave video, and the video formed by the master video and the slave video is called a composite video.

The screen SC is, for example, a 300-inch screen having an aspect ratio of 4: 3.
The projector system 200 is installed, for example, on the ceiling of a large hall of a hotel, and projects a wide video Vw having an aspect ratio of 16: 9 as a composite video in which a master video and a slave video are arranged on the screen SC with an overlap. .
The projector system 200 selects either one of a stack video as a composite video obtained by superimposing a master video having an aspect ratio of 4: 3 and a slave video having the same screen size, or a wide video Vw. Project an image.

Various types of video signals and the like are input to the master projector 201 using an external video source 203 such as a PC (personal computer) or a DVD (Digital Versatile Disk) player as an external video source 203.
Master projector 201 and slave projector 202 are electrically connected via communication cables 1 and 2.

<Outline of Master Projector>
FIG. 2 is a schematic configuration diagram of a projector system according to an embodiment of the present invention.
First, a schematic configuration of the master projector 201 will be described. The master projector 201 separates the light emitted by the lamp 3 as a light source into three primary color components of red light, blue light, and green light, and a liquid crystal light valve for each color light as a light modulation element for each color light. This is a so-called “liquid crystal three-plate projector” that modulates according to a video signal by 4R, 4G, and 4B, synthesizes again, and projects it onto the screen SC.
In FIG. 2, the screen SC is divided into a master projector 201 and a slave projector 202 for convenience of drawing, but the screen SC is integrated as shown in FIG.
The master projector 201 includes a lamp 3, an optical unit 4, an operation unit 5, a remote control 6, an Amp 7, a video converter 8, a video signal processing unit 9, a video memory 10, a video correction unit 11, an OSD memory 12, a liquid crystal panel driving unit 13, The lamp driving unit 14, the projection lens 15, the projection lens adjustment unit 16, the communication unit 17, the operation receiving unit 18, the power supply unit 19, the control unit 20, the storage unit 21, the image analysis unit 22, and the like.

The lamp 3 is a discharge lamp capable of obtaining high luminance such as a high-pressure mercury lamp, a metal halide lamp, and a halogen lamp.
The optical unit 4 includes an integrator optical system that converts white light emitted from the lamp 3 into substantially parallel light having a stable luminance distribution, and red, green, and blue colors that are the three primary colors of light. A separation optical system (not shown) that separates the light components and supplies the light components to the liquid crystal light valves 4R, 4G, and 4B for each color light, and the liquid crystal light valves 4R, 4G, and 4B convert the color signals into video signals. It is configured to include a synthesis optical system 23 that synthesizes each color light modulated accordingly. Since the integrator optical system and the separation optical system are not the gist of the present invention, detailed description thereof is omitted.
The liquid crystal light valve 4R is for red light, 4G is for green light, and 4B is for blue light. Each has the same screen size and an aspect ratio of 4: 3, for example, resolution XGA (1024 × 768) is there.
The combining optical system 23 is a cross dichroic prism that includes a dichroic film that reflects blue light and transmits green light, a dichroic film that reflects red light and transmits green light, and the like.

  The white light emitted from the lamp 3 enters the optical unit 4 and is separated into substantially parallel color light components with stable luminance distribution by the integrator optical system and the separation optical system, and each color is output by the liquid crystal light valves 4R, 4G, and 4B. After each light is modulated according to the video signal, it is synthesized by the synthesis optical system 23 and emitted as a full-color modulated light modulated according to the video signal.

The operation unit 5 is provided on the top surface of the exterior portion of the master projector 201 and includes a plurality of operation buttons. The operation buttons include a “power button” for starting and stopping the master projector 201, a high-brightness stack projection image with an aspect ratio of 4: 3 by a composite image, and a high-resolution image with an aspect ratio of 16: 9. "Display mode switching button" for switching the display mode with wide video, "Master / slave switching button" for switching the function of the master projector and slave projector, "Cross button" for selecting various functions, and the cross button A plurality of switches (all not shown) such as a “decision button” for executing the selected function are provided.
Hereinafter, the display mode will be described as indicating the display format of the composite video.
The remote controller 6 includes a plurality of buttons similar to those of the operation unit 5. When these buttons are operated, operation information of functions belonging to the respective buttons is sent to an operation receiving unit 18 described later by infrared rays.
Master projector 201 can be operated by operation unit 5 or remote control 6.

Amp 7 is a video amplifier composed of an operational amplifier and the like, amplifies the video signal input from the selected external video source 203 and sends it to the video converter 8, and also transmits the video to the slave projector 202 described later via the communication cable 1. Transmit the signal.
The communication cable 1 is, for example, a communication cable provided with a mini D-sub 15-pin terminal on both terminals. By using 15 signal lines properly, analog RGB signals, component signals, S (Separate) signals, composite signals, etc. A video signal selected from a plurality of video signals can be transmitted.

Although not shown in the figure, an input selector is provided at the front stage of Amp7. For example, a video signal of a video source selected from a plurality of video sources such as a PC or a DVD player is input to Amp7. To do. The external video source 203 is selected by operating the operation unit 5 or the remote controller 6. The default value of the external video source 203 of the master projector 201 is set to an image with an aspect ratio of 4: 3 by analog RGB signals from the PC.
Further, the communication cable 1 may be a communication cable having an S terminal connector for S signal or an RCA connector for composite signal at both terminals.

The video converter 8 performs A / D conversion processing for converting the video signal Vin from an analog signal to a digital signal, etc., to the video signal Vin so that various video signal processings described later can be performed on the input video signal Vin. And output as a digital video signal Din.
When the video signal Vin is an analog RGB signal from a PC or a component signal from a DVD player or the like, the video converter 8 performs video signal processing including A / D conversion processing as it is. When the video signal Vin is, for example, an S signal from an S (Separate) video player or a composite signal from a video player, the video signal Vin is converted into a digital component signal by a built-in decoder and output as a digital video signal Din.

  The video signal processing unit 9 writes video data into the video memory 10 in order to make the digital video signal Din input from the video converter 8 suitable for display on the liquid crystal light valves 4R, 4G, and 4B. Video signal processing such as reading under the above conditions is performed. The video signal processing includes scaling processing that matches the resolution of the liquid crystal light valves 4R, 4G, and 4B by enlarging and reducing the video represented by the video signal Din, and the number of drawing updates per second for the liquid crystal light valve 4R, Frame rate conversion adapted to 4G and 4B specifications is included. For example, when the display mode of the composite video is selected as a high-resolution wide video with an aspect ratio of 16: 9, the video signal processing unit 9 becomes a reference for the wide video from the video represented by the video signal Din described later. Processing for cutting out the master video portion and trapezoid correction processing described later are also performed. The video signal Din is subjected to such video signal processing and output as a digital video signal Dsc.

FIG. 3 is a diagram showing a screen configuration of the wide video Vw of FIG. With reference to FIG. 3, the screen configuration of a wide video will be described. The wide video Vw having an aspect ratio of 16: 9 is composed of a master video Vm projected by the master projector 201 and a slave video Vs projected by the slave projector 202.
Since the master video Vm is a video with an aspect ratio of 4: 3, the vertical ratio (3) is regarded as the vertical ratio “9” of the wide video Vw, and the video starting from the left side of the wide video Vw It has become. Since the slave video Vs is also a video with an aspect ratio of 4: 3, the vertical ratio (3) is regarded as the vertical ratio “9” of the wide video Vw, and the video starting from the right side of the wide video Vw It has become.
The master video Vm and the slave video Vs are formed side by side with an overlap of the region L. The brightness in the area L of the master video Vm is set such that, for example, the brightness gradually decreases by gradually lowering the gradation of the image data from the start side to the end side of the overlapping portion with the slave video Vs. To do. Similarly, since the luminance in the region L of the slave video Vs is also set to gradually decrease, the video represented by the wide video Vw is a video with a constant luminance.

Returning to FIG. The video correction unit 11 converts the gradation value of the video signal Dsc into a gradation value suitable for displaying on the liquid crystal light valves 4R, 4G, and 4B into the digital video signal Dsc from the video signal processing unit 9. Correction processing and color unevenness correction processing due to luminance unevenness inherent to the liquid crystal light valves 4R, 4G, and 4B are performed and output as a video signal Dout.
Further, the video correction unit 11 displays, for example, a display mode selection menu or various operations by an OSD (On-Screen Display) command for superimposing fixed character information on a video signal Dout from the control unit 20 described later. Video processing for the OSD function for superimposing the situation or the like on the video represented by the video signal Dout is performed.
The OSD memory 12 stores OSD display information such as “wide video” superimposed on the projected video in the OSD function, a standby screen display when no video signal is input, and the like. In addition, a plurality of image patterns projected as test patterns when a master image is captured by the CCD 25 described later are stored.
The video correction unit 11 allocates the corresponding OSD display information from the OSD memory 12 according to the OSD command from the control unit 20, and outputs it in addition to the video signal Dout.

The liquid crystal panel drive unit 13 supplies the liquid crystal light valves 4R, 4G, and 4B with the video signal Dout input from the video correction unit 11, the drive voltage, and the like, and displays the images on the liquid crystal light valves 4R, 4G, and 4B.
The lamp driving unit 14 is supplied with power from a power source unit 19 which will be described later, and generates an igniter circuit that forms a discharge path by generating a high voltage for lighting the lamp 3 that is a discharge lamp, and a stable after lighting. A ballast circuit (none of which is shown) for maintaining the lighting state is provided.
The projection lens 15 is composed of a plurality of concave and convex lenses and the like, and expands the modulated light from the optical unit 4 to form projection light, and projects an image on the screen SC. The projection lens 15 supports a zoom function for adjusting the magnification of the projection light, a focus function for adjusting the focus of the projection light, a lens shift function for adjusting the projection position of the projection light, and the like.

The projection lens adjustment unit 16 includes piezoelectric motors MF, MX, MY, MZ as a plurality of actuators, drive circuits (not shown) for driving the respective piezoelectric motors, and the like. Adjust the projection lens using the adjustment command. The piezoelectric motor MF performs focus adjustment, and the piezoelectric motor MZ performs zoom adjustment by moving the lenses constituting the projection lens corresponding to each piezoelectric motor. The piezoelectric motors MX and MY move the entire projection lens 15 by adjusting the lens shift in the X-axis direction and the Y-axis direction, respectively, with the vertical direction of the image projected on the screen SC as the Y axis and the horizontal direction as the X axis. To do.
The piezoelectric motors MF, MX, MY, and MZ are provided with, for example, a rotary encoder as a rotational speed detection sensor for detecting the rotational speed of each piezoelectric motor. A rotation number detection signal from the rotary encoder is sent to the control unit 20 via the projection lens adjustment unit 16. The control unit 20 assigns zoom, focus, and lens shift adjustment amounts according to the rotation detection signal from the correlation table between the rotation speed and each adjustment amount stored in the storage unit 21, and stores the setting information in the storage unit 21. Can be made. Similarly, it is possible to grasp from the rotation detection signal whether or not the adjustment according to the setting information has been performed after each adjustment based on the stored setting information.

  The communication unit 17 is a serial port, for example, and is connected to the slave projector 202 via a communication cable 2 compatible with USB (Universal Serial Bus) or RS232C (Recommended Standard 232 version C). The communication unit 17 sends display mode information, which will be described later, to the slave projector 202 via the communication cable 2 in response to a transmission command from the control unit 20.

When an operation is performed on the operation unit 5 or an operation on the remote controller 6, the operation reception unit 18 receives the operation and outputs an operation signal serving as a trigger for various operations to the control unit 20 described later.
The power supply unit 19 is stabilized by guiding the AC power from the external power supply 24 from the plug and performing transformation, rectification, and smoothing in the built-in AC / DC conversion unit (both not shown). A DC voltage is supplied to each part of the projector 201.

The control unit 20 is a CPU (Central Processing Unit), exchanges signals with each unit via the bus line Bus, and controls the operation of each unit in accordance with an operation signal from the operation receiving unit 18. .
For example, when an operation signal is input from the operation receiving unit 18 by operating the “display mode switching button” of the remote controller 6, the control unit 20 relates to, for example, a wide video master video as a composite video selected from the storage unit 21 described later. The setting information is read, and the adjustment command is output to the projection lens adjustment unit 16 and the video adjustment command is output to the video signal processing unit 9. Further, in synchronization with the adjustment command, display mode information including identification information of the wide video is sent to the slave projector 202 via the communication unit 17.
Further, the control unit 20 manages the OSD function described above. For example, an OSD command including information for assigning OSD display information corresponding to the selected display mode from the OSD memory 12 is sent to the video correction unit 11 in synchronization with the adjustment command.

The storage unit 21 is configured by a non-volatile memory capable of rewriting data, such as a flash memory, for example. The storage unit 21 includes, for example, programs such as a startup routine for starting the projector 201, various operation routines for controlling the operation of the projector 201, and a plurality of display modes when a display mode is selected. Various information including setting information regarding the size, projection position, focus, and shape of each master image is stored.
In addition, the storage unit 21 corresponds to a case where master-slave switching for switching the functions of the master projector and the slave projector is selected, and setting information regarding the size, projection position, focus, and shape of the slave video for each of the plurality of display modes. An operation control program necessary for the slave projector 202 according to the control of the master projector 201 is stored.

  The image analysis unit 22 converts a charge coupled device (CCD) 25 as an area sensor that captures the projected master video, and an analog voltage value corresponding to the brightness of the master video captured by the CCD 25 into a digital gradation value. For example, an A / D conversion circuit (not shown).

<Outline of slave projector>
Next, the configuration of the slave projector 202 will be described. Slave projector 202 has the same configuration and function as master projector 201.
The slave projector 202 performs a master-slave switching operation for switching the functions of the master projector and the slave projector to the master projector 201 to function as a slave projector. Hereinafter, this state is referred to as a slave function selection state.
Each component of the slave projector 202 in FIG. 2 is the same as that of the master projector 201. However, in order to clarify the section in the description, “S” is added to the name of each component.

The slave projector 202 includes an S lamp 103, an S optical unit 104, an S operation unit 105, an S remote control 106, an SAmp 107, an S video converter 108, an S video signal processing unit 109, an S video memory 110, an S video correction unit 111, and an SOSD memory. 112, S liquid crystal panel drive unit 113, S lamp drive unit 114, S projection lens 115, S projection lens adjustment unit 116, S communication unit 117, S operation receiving unit 118, S power supply unit 119, S control unit 120, S memory Unit 121, S image analysis unit 122, and the like. Since the configuration and function of each part are the same as the description of each part corresponding to the master projector 201, the description is omitted.
Further, although the S remote controller 106 is included in the above configuration, it is not shown in the slave function selection state because it is set not to accept all remote control operations. The S operation accepting unit 118 stops functioning. Note that the slave function selection state is canceled by an operation of the S operation unit 105 or an instruction from the master projector.

  In the slave function selection state, various operations such as activation and termination of the slave projector 202, the size of the slave video, and focus adjustment are performed on the master projector 201 side by operating the remote controller 6 or the like. For example, by operating the remote controller 6, the slave video adjustment menu is OSD-displayed on the master video, the zoom or focus menu is selected, the adjustment degree is determined, and then the “decision button” is operated. 17, an adjustment command for adjusting the slave video is output.

<Initial setting process during installation>
Next, the initial setting performed when the projector system 200 is installed with reference to FIGS. 1 and 2 will be described mainly with reference to FIG. FIG. 4 is an initial setting flowchart of the display mode performed when the projector system 200 of FIG. 1 is installed.
As shown in FIG. 1, the projector system 200 is installed in a large hall of a hotel, for example, in a state where two master projectors 201 and slave projectors 202 overlap each other and are suspended from the ceiling of the hall. This two-tiered state is a standard installation state of the projector system 200.
The master projector 201 is in the master function selection state with the factory default settings, and the slave projector 202 is set to select the slave function before being installed on the ceiling.
An operator who performs initial setting operates the master projector 201 from the floor side of the hall by using the remote controller 6.

In step S1, an initialization operation is performed by turning on the power of the master projector 201 and the slave projector 202 by operating the remote controller 6. The initialization operation includes initialization of circuits of the respective parts of the master projector 201 and the slave projector 202, and execution of a self-diagnosis program stored in the storage unit 21 and the S storage unit 121.
The master projector 201 projects a default blue solid master image on the screen SC by the initialization operation. In the upper left of the blue solid master image, “Please press the display mode switching button” is displayed by the OSD function. This display is displayed to prompt the initial setting when the past setting information by the user is not stored in the storage unit 21 of the master projector 201. Note that the size and focus of the master video are adjusted by the operator so that the OSD display can be read.

In step S <b> 2, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 has been operated based on an operation signal from the operation receiving unit 18. When there is no operation, it continues to wait for the operation. When there is an operation, the process proceeds to step S3.
In step S3, the control unit 20 uses the OSD function to superimpose the characters “stack video?” On the master video by using the operation signal from the operation receiving unit 18 by the operation of the “display mode switching button” as a trigger. Prompt for confirmation.
In step S <b> 4, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 is operated based on the operation signal from the operation receiving unit 18. When there is an operation, the process proceeds to step S15. Here, since there was no operation, the process proceeds to step S5.
In step S <b> 5, the control unit 20 determines whether or not the “OK” button of the remote controller 6 is operated based on the operation signal from the operation receiving unit 18. If the operation has not been performed for a predetermined time, for example, 30 seconds, the process returns to step S2. Here, since there is an operation, the process proceeds to step S6.

In step S6, since the selection of the stack video is confirmed in step S5, the control unit 20 controls the master video in the stack video by the video signal processing unit 9, the projection lens adjustment unit 16, the storage unit 21, the image analysis unit 22, the CCD 25, and the like. Adjust the size, projection position, focus, and shape.
FIG. 6 is a test pattern according to an embodiment. FIG. 7 is an explanatory diagram of screen position detection.
First, the control unit 20 sends an OSD command for superimposing the test pattern T shown in FIG. 6 stored in the OSD memory 12 to the video signal to the video correction unit 11. Subsequently, while the focus adjustment piezoelectric motor MF is gradually changed from the minimum value to the maximum value of the adjustment range, a projected image of black vertical stripes is captured on the white base, and the contrast value of the captured projection image is maximized. The adjustment position is detected. This focus adjustment utilizes the fact that the high frequency component of the detection signal of the CCD 25 is maximized when the focus is achieved.

  Subsequently, the control unit 20 causes the image correction unit 11 to project a white plain image. The control unit 20 captures a white plain projected image while gradually changing the zoom adjustment piezoelectric motor MZ from the maximum value to the minimum value of the adjustment range, and the luminance is increased in the horizontal scanning line direction of the captured projection image. Detect changing points. As shown in FIG. 7, the point where the luminance changes greatly becomes the end point of the screen SC. Similarly, a point where the luminance greatly changes in the vertical scanning line direction is detected. Thus, since the size and position of the screen SC have been grasped, the configuration data defining the size and projection position of the master image corresponding to the screen SC is read from the setting information of the stack image in the storage unit 21, and the piezoelectric motor for lens shift is read. A solid white master image is projected by MX, MY and a piezoelectric motor MZ for zoom adjustment.

Further, the control unit 20 captures and analyzes the projected white plain master image and compares it with configuration data as setting information in the storage unit 21. When there is a difference between the analysis result and the configuration data that is larger than a predetermined allowable value, the piezoelectric motors MX, MY, and MZ are driven again to perform readjustment, and imaging and analysis are performed again. The control unit 20 performs imaging, analysis, and adjustment by a plurality of piezoelectric motors until the difference between the analysis result and the configuration data is within an allowable value.
Further, the focus adjustment described above may be performed again at this timing. Thereby, a clearer master image can be obtained.

  Subsequently, the control unit 20 captures a white plain projected image that has been adjusted in focus and size, and compares the lengths of opposite sides of the captured trapezoidal image to detect the degree of trapezoid distortion. Furthermore, when the video signal is scaled by the video signal processing unit 9 according to the detected degree of the trapezoidal distortion, the projected image becomes an image having a trapezoidal distortion opposite to the detected trapezoidal distortion in the vertical signal direction. The video signal processing is performed as described above.

  Further, the control unit 20 outputs a video adjustment command for projecting the video represented by the input video signal Vin with the screen configuration as it is, to the video signal processing unit 9 when the stacked video is selected.

In step S7, the control unit 20 uses a parameter based on a detection signal from a rotary encoder installed in each piezoelectric motor that defines the size, projection position, and focus of the master image adjusted in step S6, and a video signal processing unit. 9, parameters used for correcting the shape of the master video are stored in the storage unit 21 as setting information of the master video in the stack video. Since the setting of the master video has been completed so far, the projection of the master video by the test pattern is stopped, and the process proceeds to step S8.
In step S8, the control unit 20 sends display mode information including the identification information of the stacked video and the setting information of the master video adjusted in step S6 to the slave projector 202 via the communication unit 17.
In step S9, the S control unit 120 of the slave projector 202 follows the display mode information from the master projector 201, and the S video signal processing unit 109, the S projection lens adjustment unit 116, the S storage unit 121, the S image analysis unit 122, and the CCD 125. Adjust the focus and size and shape of the slave video.

In the S storage unit 121 of the slave projector 202, when the projector system 200 is in a standard installation state, display modes of master video setting information of the master projector 201 and expected slave video setting information are displayed. Each video correlation table is stored.
The S control unit 120 reads out predicted configuration data that defines the size, projection position, focus, and shape of the slave video calculated from the setting information of the master video from the video correlation table of the stack video in the S storage unit 121. An adjustment command is sent to the video signal processing unit 109, the S projection lens adjustment unit 116, and the like.
The S control unit 120 projects a white plain slave image from the adjusted projection lens 15.

Further, the S control unit 120 captures and analyzes the projected white plain slave image and compares it with the expected configuration data as the setting information. When the analysis result and the predicted configuration data have a difference larger than a predetermined allowable value, the piezoelectric motors MF, MX, MY, and MZ are driven again to perform readjustment, and imaging and analysis are performed again. The S control unit 120 performs imaging, analysis, and adjustment by a plurality of piezoelectric motors until the difference between the analysis result and the predicted concept data is within an allowable value.
Further, the focus adjustment described above may be performed again at this timing. Thereby, a clearer slave image can be obtained.

The S control unit 120 sends a video adjustment command for projecting the same video as the video projected by the master video to the S video signal processing unit 109 according to the display mode information.
In response to the adjustment command from the S control unit 120, the S video signal processing unit 109 outputs a video signal Dsc representing the same video as the master video.

In step S10, the S control unit 120 sets parameters and S images based on detection signals from rotary encoders installed in each piezoelectric motor that defines the size, projection position, focus, and shape of the slave image adjusted in step S9. The parameter of the signal processing unit 109 is stored in the storage unit 21 as setting information of the slave video in the stack video.
In step S11, the control unit 20 of the master projector 201 completes the setting of the master video and the slave video through the steps so far, and thus projects the master video and the slave video by the video signal Vin from the input video source 203. Project the stack image. In the case of a stack video, both the master projector 201 and the slave projector 202 project the video represented by the input video signal Vin as it is because the same video is projected for both the master video and the slave video.

In step S12, in order to confirm whether or not the set stack video is acceptable, the control unit 20 superimposes a character “video decision?” On the stack video by the OSD function, and checks the video by operating the “decision button”. Prompt.
Until the “decision button” is pressed, the operator can correct the image by the remote controller 6. By operating the “image adjustment button” on the remote controller 6, menus such as “master image zoom”, “master image projection position”, “master image focus”, and “master image shape” are displayed on the OSD, and these are selected and determined. Thus, the master video can be corrected. The slave video can be similarly corrected. Here, since the “decision button” has been operated after the correction by the operator, the process proceeds to step S13.

In step S13, since the stack video has been confirmed, the control unit 20 updates the setting information in the storage unit 21 to the master video setting information in the stack video being projected that has been corrected by the operator, and stores it. .
In step S14, since the stack video has been confirmed, the S control unit 120 updates the setting information in the S storage unit 121 to the setting information of the slave video in the stack video being projected that has been corrected by the operator. Remember.

Subsequently, the case where there is an operation of the “display mode switching button” in step S4 will be described.
In step S15, since the “display mode switching button” has been operated, the control unit 20 causes the OSD function to superimpose the characters “wide video?” On the master video and prompts the user to confirm the display mode.
In step S <b> 16, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 has been operated based on the operation signal from the operation receiving unit 18. When there is an operation, the process returns to step S3. Here, since there was no operation, it progresses to step S17.
In step S <b> 17, the control unit 20 determines whether or not the “OK” button of the remote controller 6 is operated based on an operation signal from the operation receiving unit 18. If the operation has not been performed for a predetermined time, for example, 30 seconds, the process returns to step S2. Here, since there is an operation, the process proceeds to step S18.

In step S18, since the selection of the wide video has been confirmed in step S17, the control unit 20 performs the master video of the wide video by the video signal processing unit 9, the projection lens adjustment unit 16, the storage unit 21, the image analysis unit 22, the CCD 25, and the like. Adjust focus, size and shape.
First, the control unit 20 sends an OSD command for superimposing the test pattern shown in FIG. 6 stored in the OSD memory 12 on the video signal to the video correction unit 11. Subsequently, while the focus adjustment piezoelectric motor MF is gradually changed from the minimum value to the maximum value of the adjustment range, a projected image of black vertical stripes is captured on the white base, and the contrast value of the captured projection image is maximized. The adjustment position is detected.

  Subsequently, the control unit 20 causes the image correction unit 11 to project a white plain image. The control unit 20 captures a white plain projected image while gradually changing the zoom adjustment piezoelectric motor MZ from the maximum value to the minimum value of the adjustment range, and the luminance is increased in the horizontal scanning line direction of the captured projection image. Detect changing points. Similarly, a point where the luminance greatly changes in the vertical scanning line direction is detected. As a result, since the size and position of the screen SC have been grasped, the configuration data defining the size and projection position of the master image corresponding to the screen SC is read from the setting information of the wide image in the storage unit 21, and the piezoelectric motor for lens shift is read. A solid white master image is projected by MX, MY and a piezoelectric motor MZ for zoom adjustment.

Further, the control unit 20 captures and analyzes the projected white plain master image and compares it with the configuration data. When there is a difference between the analysis result and the configuration data that is larger than a predetermined allowable value, the piezoelectric motors MX, MY, and MZ are driven again to perform readjustment, and imaging and analysis are performed again. The control unit 20 performs imaging, analysis, and adjustment by a plurality of piezoelectric motors until the difference between the analysis result and the configuration data is within an allowable value.
Further, the focus adjustment described above may be performed again at this timing. Thereby, a clearer master image can be obtained.

Subsequently, the control unit 20 captures a white plain projected image that has been adjusted in focus and size, and compares the lengths of opposite sides of the captured trapezoidal image to detect the degree of trapezoid distortion. In accordance with the detected degree of trapezoidal distortion, the video signal processing unit 9 performs trapezoidal distortion correction.
Further, the control unit 20 outputs to the video signal processing unit 9 a video adjustment command for cutting out a portion to be a master video from the video specified by the video signal Din when the wide video is selected.

In step S19, a parameter based on a detection signal from a rotary encoder installed in each piezoelectric motor that defines the size, projection position, focus, and shape of the master image adjusted in step S18 and a parameter of the video signal processing unit 9 are used. Are stored in the storage unit 21 as setting information of the master video in the wide video.
Since the setting of the master video has been completed so far, the projection of the master video by the test pattern is stopped, and the process proceeds to step S20.

In step S20, the control unit 20 sends display mode information including identification information of the wide video and setting information of the master video adjusted in step S18 to the slave projector 202 via the communication unit 17.
In step S21, the S control unit 120 of the slave projector 202 follows the display mode information from the master projector 201, and the S video signal processing unit 109, the S projection lens adjustment unit 116, the S storage unit 121, the S image analysis unit 122, and the CCD 125. Adjust the size, projection position, focus, and shape of the slave image.

The S control unit 120 reads the expected configuration data that defines the size, projection position, focus, and shape of the slave video calculated from the master video setting information from the video correlation table of the wide video in the S storage unit 121, and S An adjustment command is sent to the video signal processing unit 109, the S projection lens adjustment unit 116, and the like.
The S control unit 120 projects a white plain slave image from the adjusted S projection lens 115.

Further, the S control unit 120 captures and analyzes the projected white plain master image, and compares it with expected configuration data as setting information. When there is a difference between the analysis result and the predicted configuration data that is larger than a predetermined allowable value, the piezoelectric motors MF, MX, MY, and MZ are again driven and adjusted, and imaging and analysis are performed again. The S control unit 120 performs imaging, analysis, and adjustment by a plurality of piezoelectric motors until the difference between the analysis result and the predicted configuration data is within an allowable value.
Further, the focus adjustment described above may be performed again at this timing. Thereby, a clearer master image can be obtained.

In step S22, the S control unit 120 uses a parameter or S image based on a detection signal from a rotary encoder installed in each piezoelectric motor that defines the size, projection position, focus, and shape of the slave image adjusted in step S21. The parameters of the signal processing unit 109 are stored in the S storage unit 121 as slave video setting information in the wide video.
In step S23, the control unit 20 of the master projector 201 completes the setting of the master video and the slave video through the steps so far, and thus projects the master video and the slave video by the video signal Vin from the video source 203 that is input. Project a wide image.

In step S24, in order to confirm whether or not the set wide image is acceptable, the control unit 20 superimposes the character “image decision?” On the stack image by the OSD function, and confirms the image by operating the “decision button”. Prompt.
Until the “decision button” is pressed, the operator can correct the image by the remote controller 6. By operating the “image adjustment button” on the remote controller 6, menus such as “master image zoom”, “master image projection position”, “master image focus”, and “master image shape” are displayed on the OSD, and by selecting them, The master video can be corrected. The slave video can be similarly corrected. Here, since the “decision button” has been operated after the correction by the operator, the process proceeds to step S25.

In step S25, since the wide image has been confirmed, the control unit 20 updates the setting information in the S storage unit 121 to the setting information of the master image in the wide image being projected that has been corrected by the operator, and stores the setting information. To do.
In step S26, since the confirmation of the wide image has been made, the S control unit 120 updates the setting information in the S storage unit 121 to the setting information of the slave image in the wide image being projected that has been corrected by the operator. Remember.

《Display mode switching processing》
Next, the display mode switching operation of the projector system 200 will be described with reference to FIG. FIG. 5 is a flowchart of the display mode switching operation of the projector system 200.

In step S31, the power of the master projector 201 and the slave projector 202 is turned on by operating the remote controller 6.
In step S32, first, when the power is turned on, initialization operations such as initialization of circuits of the master projector 201 and the slave projector 202 are performed as initialization and video settings.
The projector system 200 stores the display mode setting when the projector system 200 was last operated and terminated in the storage unit 21 and is set to reproduce the display mode setting at the last activation at the next use. Has been.
Here, it is assumed that the display mode at the previous termination is a stack video. Accordingly, the stack video is set in the initialization operation.

In step S32
In (A), the control unit 20 reads the setting information of the master video in the stack video display mode from the storage unit 21.
In (B), the control unit 20 sends an adjustment command for defining the size, projection position, and focus of the master image to the projection lens adjustment unit 16 in accordance with the setting information read in (A). Adjust. In synchronism, the video signal processing unit 9 has an adjustment command for correcting the shape of the master video and a video adjustment command for projecting the video represented by the input video signal Vin with the same screen configuration. send.
In (C), the control unit 20 sends the display mode information of the stack video to the slave projector 202.
In (D), the S control unit 120 reads the slave video setting information in the stack video display mode from the S storage unit 121.
In (E), the S control unit 120 sends an adjustment command for defining the size, projection position, and focus of the slave image to the S projection lens adjustment unit 116 along the setting information read in (D). The projection lens 115 is adjusted. In synchronism, the S video signal processing unit 109 also has an adjustment command for correcting the shape of the slave video and a video adjustment command for projecting the video represented by the input video signal Vin with the same screen configuration. Send.
The projector system 200 in which the stacked video is set projects the stacked video by the video signal Vin from the external video source 203.

In step S <b> 33, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 has been operated based on the operation signal from the operation receiving unit 18. When there is no operation, it continues to wait for the operation. When there is an operation, the process proceeds to step S34.
In step S34, when the operation signal is input from the operation receiving unit 18 by the operation of the “display mode switching button”, the control unit 20 causes the OSD to display “wide video?” For confirming the selected display mode. Send OSD command to display.

In step S <b> 35, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 has been operated based on an operation signal from the operation receiving unit 18. When there is an operation, the process proceeds to step S43. Here, since there was no operation, it progresses to step S36.
In step S <b> 36, the control unit 20 determines whether or not the “OK” button of the remote controller 6 is operated based on an operation signal from the operation receiving unit 18. If the operation has not been performed for a predetermined time, for example, 30 seconds, the process returns to step S33. Here, since there is an operation, the process proceeds to step S37.

In step S <b> 37, the control unit 20 reads master video setting information in the wide video display mode from the storage unit 21.
In step S38, the control unit 20 adjusts the projection lens 15 by sending an adjustment command for defining the size, projection position, and focus of the master image to the projection lens adjustment unit 16 in accordance with the setting information read in step S37. To do. In synchronism, the video signal processing unit 9 has an adjustment command for correcting the shape of the master video and a video adjustment command for cutting out a portion to be the master video from the video defined in the video signal Din. send.
In step S <b> 39, the control unit 20 sends wide video display mode information to the slave projector 202.

In step S <b> 40, the S control unit 120 reads the slave video setting information in the wide video display mode from the S storage unit 121.
In step S41, the S control unit 120 sends an adjustment command for defining the size, projection position, and focus of the slave image to the S projection lens adjustment unit 116 in accordance with the setting information read in step S40. 115 is adjusted.
In synchronism, the S video signal processing unit 109 also has an adjustment command for correcting the shape of the slave video and a video adjustment command for cutting out the portion that becomes the slave video from the video defined in the video signal Din. Send.
In step S <b> 42, the projector system 200 in which the wide video has been set projects a wide video using the video signal Vin from the external video source 203.

Next, the case where there is an operation of the “display mode switching button” on the remote controller 6 in step S35 will be described.
In step S43, the control unit 20 causes the display “stacked video?” To be superimposed on the projected video by the OSD function.
In step S <b> 44, the control unit 20 determines whether or not the “display mode switching button” of the remote controller 6 has been operated based on the operation signal from the operation receiving unit 18. When there is an operation, the process returns to step S34. Here, since there was no operation, it progresses to step S45.
In step S <b> 45, the control unit 20 determines whether or not the “OK” button of the remote controller 6 is operated based on an operation signal from the operation receiving unit 18. If the operation has not been performed for a predetermined time, for example, 30 seconds, the process returns to step S33. Here, there is an operation, but since the stack video has already been projected, the process returns to step S33.
If the last display mode was wide video, the initialization operation sets the wide video, and when the display is switched thereafter, the video is switched to the stack video according to the same routine described above. .
As described above, according to the present embodiment, the following effects can be obtained.

  (1) The composite image projected by the projector system 200 is a stack image in which the master image and the slave image are superimposed and a wide image in which the master image and the slave image are arranged. Therefore, since the stack video is a superimposition of the projection images of the master projector 201 and the slave projector 202, the brightness of the stack video is obtained by adding the brightness of the slave video to the brightness of the master video. Obtainable.

For example, if both the master projector 201 and the slave projector 202 have a projected luminance of 2000 lumens, the stacked video can be set to a high luminance of 4000 lumens. Incidentally, in the 300-inch screen shown in FIG. 1, the brightness in the practical range when ambient lighting is reduced is said to be 3500 lumens or more.
Further, since the wide video Vw shown in FIG. 3 is obtained by arranging the projection images of the master projector 201 and the slave projector 202, the resolution of the composite video is the resolution of the master video Vm excluding the overlapping area L. And the resolution of the slave video Vs are added, and a high resolution can be obtained.
For example, if the resolution of the master video Vm and the resolution of the slave video Vs are both XGA (1024 × 768), the wide video Vw can be set to a high resolution of WXGA (1280 × 768).
Furthermore, it is possible to easily switch the stack video or the wide video by operating the “display mode switching button” on the operation unit such as the remote controller 6.

Therefore, the projector system 200 of the present invention can switch and project a high-brightness stack projection image and a high-resolution wide image image by one system.
Moreover, since the slave projector 202 projects a slave image based on the display mode information from the master projector 201, a desired composite image can be obtained by selecting a composite image to be projected to the master projector. it can.
Therefore, it is possible to provide a projector system 200 that can easily switch between a high-brightness stack projection image and a high-resolution wide image.

(2) The control unit 20 of the master projector 201 allocates setting information related to the master video of the selected composite video from the storage unit 21 in accordance with the operation signal from the operation receiving unit 18, and the video along the allocated setting information. Since the adjustment command is output to the signal processing unit 9 and the projection lens adjustment unit 16, and the display mode information is sent to the slave projector 202, the master image is projected along the setting information of the selected composite image, and the slave projector 202 controls to project a slave image of the selected composite image.
Accordingly, it is possible to provide the master projector 201 that projects the master video that is the reference of the selected composite video and controls the projection of the slave video of the slave projector 202.

(3) The S control unit 120 of the slave projector 202 allocates setting information related to the slave video of the selected composite video from the S storage unit 120 in accordance with the display mode information from the master projector 201, and follows the allocated setting information. Since the adjustment command is output to the S video signal processing unit 109 and the S projection lens adjustment unit 116, the slave video of the selected composite video is projected along the setting information according to the display mode information from the master projector 201.
Therefore, it is possible to provide the slave projector 202 that projects the slave video for constructing the selected composite video according to the control of the master projector 201.

(4) The master projector 201 can adjust the size, projection position, and focus of the master image by the plurality of piezoelectric motors MF, MX, MY, MZ of the projection lens adjustment unit 16. Further, the shape of the master video can be corrected by the video signal processing in the video signal processing unit 9.
Therefore, it is possible to provide the master projector 201 that can project an image faithful to the image signal.

(5) The slave projector 202 can adjust the size, projection position, and focus of the slave image by the plurality of piezoelectric motors MF, MX, MY, MZ of the S projection lens adjustment unit 116. Further, the shape of the slave video can be corrected by video signal processing in the S video signal processing unit 109.
Therefore, it is possible to provide the slave projector 202 that can project an image faithful to the image signal.

(6) The master projector 201 analyzes the CCD 25 as an area sensor for capturing the projected master image, and the image captured by the CCD 25, and detects the size, projection position, focus, and shape of the master image. Since the image analysis unit 22 is provided, the state of the projected master video can be accurately detected.
Therefore, it is possible to adjust the projected master video so that it matches the setting information of the master video.
Therefore, it is possible to provide a master projector that can project an image more faithful to the image signal.

(7) The slave projector 202 analyzes the image captured by the CCD 125 and the CCD 125 as an area sensor for capturing the projected slave image, and detects the size, projection position, focus, and shape of the slave image. Since the image analyzing unit 22 is provided, the state of the projected slave video can be accurately detected.
Therefore, it is possible to adjust the projected slave video so as to match the setting information of the slave video.
Therefore, it is possible to provide a slave projector that can project an image more faithful to the image signal.

(8) The projector system 200 has a simple configuration with two projectors, a master projector 201 and a slave projector 202.
In addition, since the configuration of each projector is substantially the same as that of a general-purpose inexpensive projector that is mass-produced, it can be manufactured at low cost.
Therefore, it is possible to provide a projector system 200 having a simple configuration that can switch between a high-brightness stack projection image and a high-resolution wide image.

(9) The slave projector 202 makes the master projector 201 function as a slave projector by performing a master-slave switching operation for switching the functions of the master projector and the slave projector.
Therefore, it is possible to provide a master projector 201 that can select a function as a master projector and a function as a slave projector.
Accordingly, since the projector system 200 can be configured with two master projectors 201, the master projector and the slave projector need not be manufactured as dedicated machines. Therefore, an inexpensive projector system 200 can be provided due to the mass production effect of mass production.

(10) The master projector 201 adjusts and projects the size, projection position, focus, and shape of the master image that constitutes the stacked image. The stack video is a high-brightness video that superimposes the master video and slave video that represent the same video. For example, if you do not need much brightness, such as projection in a small conference room, use only the master video. Projection is sufficient.
Therefore, even if there is one master projector 201, it can function as a normal projector.
Therefore, it is possible to provide the master projector 201 of the projector system 200 that can project an image by one or a plurality of projectors according to the desired brightness of the projected image.

  It should be noted that the present invention can add various changes and improvements to the above-described embodiment. A modification will be described below.

(Modification 1)
This will be described with reference to FIG. In the above-described embodiment, the display mode is selected by operating the “display mode switching button” using the remote control 6 of the master projector 201. For example, the display mode matches the video aspect ratio defined by the input video signal Vin. It may be selected as follows.
In this case, an input selector (not shown) in front of Amp 7 sends a synchronization signal of the selected video signal Vin to the control unit 20, and the control unit 20 measures the frequency of the synchronization signal of the video signal Vin. The storage unit 21 further stores a correlation table between the synchronization frequency and the aspect ratio.
The control unit 20 assigns an aspect ratio corresponding to the measured frequency of the synchronization signal from the correlation table of the storage unit 21, and adjusts the master video along the display mode setting information of the same aspect ratio. Also, display mode information is sent to the slave projector 202.
According to this configuration, it is possible to provide the projector system 200 that can switch the projection display mode in accordance with the video aspect ratio defined by the input video signal Vin.

(Modification 2)
In the embodiment, the slave projector 202 performs a master-slave switching operation for switching the functions of the master projector and the slave projector to the master projector 201 to function as a slave projector. It may be configured as a dedicated machine.
According to this configuration, since it is sufficient that each projector has a necessary minimum configuration and function capable of projecting either a master image or a slave image, it can be manufactured at a low cost in the case of a small number of productions. There is sex.

(Modification 3)
In the embodiment, the projector system 200 is configured by two units, the master projector 201 and the slave projector 202, but is not limited to the configuration by two units. For example, a total of four master projectors 201 and two slave projectors 202 may be configured.
In this case, when projecting stacked images, the same image is projected onto four units, and the projected images from the four units are stacked. Thereby, for example, if the brightness of the projected image of each projector is 2000 lumens, it is possible to provide a projector system that can obtain a high-brightness stacked image with a brightness of 8000 lumens.

  When a wide image is projected, the wide image is formed by arranging the projected images from the four units so as to form a “field”. Accordingly, it is possible to provide a projector system capable of obtaining a high-resolution wide image in which the resolutions of the four units are totaled, excluding the overlapping resolutions of the overlapping portions.

(Modification 4)
In the above-described embodiments and modifications, the master projector 201 and the slave projector 202 that constitute the projector system 200 include three liquid crystal light valves for light of each color of red light, blue light, and green light as light modulation elements. Although described, the present invention is not limited to this. In the light modulation elements of the master projector 201 and the slave projector 202, for example, one pixel is composed of red, blue, and green color filters and cells corresponding to the color filters for each color tone, and the pixels for display resolution. A configuration using a single-plate liquid crystal light valve provided with Further, a configuration using a reflective liquid crystal display device or a tilt mirror device may be used. Even if it is these structures, the effect similar to the said embodiment and each modification can be acquired.

1 is a schematic diagram of installation of a projector system according to an embodiment. The schematic block diagram of a projector system. The screen block diagram of the wide image | video Vw. 6 is an initial setting flowchart of a display mode. The display mode switching operation flowchart. 1 is a test pattern of an embodiment. Explanatory drawing of a screen position detection. Schematic diagram of wide image projection by a plurality of conventional projectors.

Explanation of symbols

Communication cable 1, 2, remote control as operation unit 6, video signal processing unit 9, projection lens 15, projection lens adjustment unit 16, communication unit 17, operation receiving unit 18, control unit 20, Storage unit 21, image analysis unit 22, CCD as area sensor 25, 125, S video signal processing unit 109 as a video signal processing unit 109 S projection lens 115 as a projection lens, projection lens adjustment unit S projection lens adjustment unit 116, S communication unit 117 as a communication unit, S operation reception unit 118 as an operation reception unit, S control unit 120 as a control unit, S storage unit 121 as a storage unit S image analysis unit as an image analysis unit ... 122, projector system ... 200, master projector ... 201, slave projector ... 202, external video source ... 203 Screen ... SC, wide video ... Vw as a composite image.

Claims (10)

A projector system that forms a composite image by combining images projected by a plurality of projectors,
A master projector that projects a master image serving as a reference for the composite image;
A slave projector that electrically connects with the master projector and projects a slave image that forms the composite image by combining with the master image;
The composite video includes a stack video in which the master video and the slave video are superimposed, and a wide video in which the master video and the slave video are arranged,
The master projector projects the master video serving as a reference for one composite video selected from a plurality of the composite videos and sends display mode information indicating the selected composite video to the slave projector, A slave projector projects the slave video based on display mode information from the master projector. A composite image is formed by combining images projected by a plurality of projectors, a master projector that projects a master image serving as a reference for the composite image, and a stack image as the composite image by superimposing the master image. A projector operable to serve as a master projector of a projector system including a slave projector that generates or projects a slave image that generates a wide image as the composite image by arranging or aligning with the master image,
An operation receiving unit that outputs an operation signal corresponding to the instructed composite image when an operation instructing the formation of the composite image is performed;
A storage unit that stores setting information regarding the size, projection position, and focus of the master image for each of the plurality of composite images;
A communication unit for transmitting and receiving information including display mode information indicating the slave projector and the instructed composite video;
A projection lens composed of a plurality of lenses for projecting the master image;
A projection lens adjustment unit including a plurality of actuators for adjusting zoom, projection position, and focus of the projection lens;
In response to an operation signal from the operation receiving unit, setting information related to the instructed master video of the composite video is allocated from the storage unit, and an adjustment command is output to the projection lens adjustment unit along the allocated setting information A control unit,
When the control unit outputs the adjustment command, the control unit sends the display mode information to the slave projector. A composite image is formed by combining images projected by a plurality of projectors, a master projector that projects a master image serving as a reference for the composite image, and a stack image as the composite image by superimposing the master image. A projector capable of operating as a slave projector of a projector system including a slave projector that generates or projects a slave image that generates a wide image as the composite image by arranging or aligning with the master image,
A storage unit that stores setting information related to the size, projection position, and focus of the slave image for each of the plurality of composite images;
A communication unit for exchanging information including display mode information indicating the type of composite video to be projected with the master projector;
A projection lens composed of a plurality of lenses for projecting the slave image;
A projection lens adjustment unit including a plurality of actuators for adjusting zoom, projection position, and focus of the projection lens;
In accordance with the display mode information from the master projector, the setting information related to the slave image of the instructed composite image is allocated from the storage unit, and an adjustment command is sent to the projection lens adjustment unit along the allocated setting information And a control unit that outputs a projector. The projector according to claim 2,
The storage unit further stores setting information related to the shape of the master video,
A projector, further comprising: a video signal processing unit that performs processing for correcting the shape of a video represented by an input video signal on the video signal. The projector according to claim 3, wherein
The storage unit further stores setting information related to the shape of the slave video, and further includes a video signal processing unit that performs processing for correcting the video shape represented by the input video signal on the video signal. A projector characterized by that. The projector according to claim 2 or 4,
An area sensor for capturing the projected master image, and an image analysis unit that analyzes the image captured by the area sensor and detects the size, shape, and focus of the master image, Projector. The projector according to claim 3 or 5, wherein
An area sensor for capturing the projected slave image; and an image analysis unit that analyzes the image captured by the area sensor and detects the size, shape, and focus of the slave image. Projector.   The projector according to any one of claims 2, 4, and 6 is a master projector, and the projector according to any one of claims 3, 5, and 7 is a slave projector. The projector system according to claim 1. The projector according to any one of claims 2, 4, and 6,
The storage unit further stores setting information regarding the size, projection position, and focus of the slave image for each of the plurality of composite images,
When the master-slave switching operation for switching between the function as the master projector and the function as the slave projector is performed, the operation receiving unit outputs an operation signal including master-slave switching operation information,
The control unit stops the function of the operation receiving unit in response to an operation signal from the operation receiving unit, and projects the slave video along the display mode information of the slave video input to the communication unit. Projector. The master video and the slave video each have an aspect ratio of 4: 3,
9. The projector system according to claim 1, wherein the composite video is a stack video having an aspect ratio of 4: 3 and a wide video having an aspect ratio of 16: 9.

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