KR102458405B1 - Display device and electronic device having the same - Google Patents

Abstract

The display device includes a display panel including a plurality of pixels, an image processing unit configured to generate an image signal displayed on a display area of the display panel, and a dummy image signal for reducing a deterioration deviation between the display area and a dummy area surrounding the display area, and the pixels; and a data driver for supplying a data signal to the pixels, a scan driver and an image processor for supplying scan signals to pixels, and a timing controller for generating control signals for controlling the data driver and the scan driver.

Description

Display device and electronic device including same {DISPLAY DEVICE AND ELECTRONIC DEVICE HAVING THE SAME}

The present invention relates to a display device and an electronic device including the same.

A head mounted display (HMD) device refers to various digital devices that are worn on the head like glasses to receive multimedia contents. Various wearable computers have been developed in accordance with the trend of weight reduction and miniaturization of digital devices, and HMDs are also widely used. Recently, a technology for implementing a head mounted display device using a smartphone has been developed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device that improves variation in deterioration between regions.

It is another object of the present invention to provide an electronic device including a display device for improving variation in deterioration between regions.

However, the object of the present invention is not limited to the above purpose, and may be variously expanded without departing from the spirit and scope of the present invention.

In order to achieve one aspect of the present invention, a display device according to an embodiment of the present invention includes a display panel including a plurality of pixels, an image signal displayed on a display area of the display panel, and the display area and the display area. An image processing unit generating a dummy image signal for reducing deterioration deviation of a surrounding dummy region, a data driving unit supplying a data signal to the pixels, a scan driving unit supplying a scan signal to the pixels, the image processing unit, and the data driving unit and a timing controller configured to generate control signals for controlling the scan driver.

In example embodiments, the image processing unit includes an input unit receiving the image signal, an image generating unit generating a left eye image signal and a right eye image signal based on the image signal, and a second part of the display panel displaying the left eye image signal. A first dummy signal generator generating a first dummy image signal displayed in a first dummy area surrounding the first display area and a second dummy area surrounding a second display area of the display panel displaying the right eye image signal and a second dummy signal generator that generates a second dummy image signal displayed in .

In example embodiments, the first dummy signal generator generates the first dummy image signal by copying the left-eye image signal input to a pixel disposed at an outer portion of the first display area, and generates the first dummy image. Signals may be sequentially displayed on the first dummy area.

In example embodiments, the second dummy signal generator may generate the second dummy image signal by copying the right eye image signal input to a pixel disposed at the outer portion of the second display area, and generate the second dummy image. Signals may be sequentially displayed on the second dummy area.

In an embodiment, the first dummy signal generator generates the first dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the first dummy image signal to the first dummy area. can be displayed

In an embodiment, the second dummy signal generator generates the second dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the second dummy image signal to the second dummy area. can be displayed

In example embodiments, the first dummy signal generator includes the first dummy image having a grayscale value between a grayscale value and a black grayscale value of the left eye image signal input to a pixel disposed at the outermost portion of the first display area. A signal may be generated and the first dummy image signal may be displayed on the first dummy area.

In example embodiments, the second dummy signal generator includes the second dummy image having a grayscale value between a grayscale value and a black grayscale value of the right eye image signal input to a pixel disposed at the outermost portion of the second display area. A signal may be generated and the second dummy image signal may be displayed on the second dummy area.

According to an embodiment, the first dummy signal generator divides the first dummy region into a first region, a second region, and a third region, and divides the first dummy region into a first region, a second region, and a third region. The display speed of the first dummy image signal may be differently adjusted.

According to an embodiment, the second dummy signal generator divides the second dummy area into a first area, a second area, and a third area, and divides the second dummy area into a first area, a second area, and a third area. The display speed of the first dummy image signal may be differently adjusted.

In order to achieve another object of the present invention, an electronic device according to embodiments of the present invention may include a display device and a processor for controlling the display device. The display device includes a display panel including a plurality of pixels, an image signal displayed on a display area of the display panel, and an image generating a dummy image signal for reducing a deterioration deviation between the display area and a dummy area surrounding the display area a processing unit, a data driver supplying a data signal to the pixels, a scan driver supplying a scan signal to the pixels, and a timing controller generating control signals to control the image processing unit, the data driver, and the scan driver can

In example embodiments, the image processing unit includes an input unit receiving the image signal, an image generating unit generating a left eye image signal and a right eye image signal based on the image signal, and a second part of the display panel displaying the left eye image signal. A first dummy signal generator generating a first dummy image signal displayed in a first dummy area surrounding the first display area and a second dummy area surrounding a second display area of the display panel displaying the right eye image signal and a second dummy signal generator that generates a second dummy image signal displayed in .

In example embodiments, the first dummy signal generator generates the first dummy image signal by copying the left-eye image signal input to a pixel disposed at an outer portion of the first display area, and generates the first dummy image. Signals may be sequentially displayed on the first dummy area.

In example embodiments, the second dummy signal generator may generate the second dummy image signal by copying the right eye image signal input to a pixel disposed at the outer portion of the second display area, and generate the second dummy image. Signals may be sequentially displayed on the second dummy area.

In an embodiment, the first dummy signal generator generates the first dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the first dummy image signal to the first dummy area. can be displayed

In an embodiment, the second dummy signal generator generates the second dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the second dummy image signal to the second dummy area. can be displayed

In example embodiments, the first dummy signal generator includes the first dummy image having a grayscale value between a grayscale value and a black grayscale value of the left eye image signal input to a pixel disposed at the outermost portion of the first display area. A signal may be generated and the first dummy image signal may be displayed on the first dummy area.

In example embodiments, the second dummy signal generator includes the second dummy image having a grayscale value between a grayscale value and a black grayscale value of the right eye image signal input to a pixel disposed at the outermost portion of the second display area. A signal may be generated and the second dummy image signal may be displayed on the second dummy area.

According to an embodiment, the first dummy signal generator divides the first dummy region into a first region, a second region, and a third region, and divides the first dummy region into a first region, a second region, and a third region. The display speed of the first dummy image signal may be differently adjusted.

According to an embodiment, the second dummy signal generator divides the second dummy area into a first area, a second area, and a third area, and divides the second dummy area into a first area, a second area, and a third area. The display speed of the first dummy image signal may be differently adjusted.

An image processing apparatus and a display device including the same according to embodiments of the present invention may reduce a deterioration deviation between the display area and the dummy area by displaying a dummy image in the dummy area surrounding the display area of the display panel in the HMD mode. have. Accordingly, the display quality of the display device may be improved. However, the effects of the present invention are not limited to the above-described effects, and may be variously expanded without departing from the spirit and scope of the present invention.

1 is a block diagram illustrating a display device according to example embodiments.
FIG. 2 is a diagram illustrating a display panel included in the display device of FIG. 1 .
3 is a diagram showing photoreceptor cell density on the retina.
4 is a block diagram illustrating an image processing unit included in the display device of FIG. 1 .
FIG. 5 is a diagram illustrating a display panel when the display device of FIG. 1 operates in an HMD mode.
6A and 6B are diagrams illustrating an example of an operation of an image processing unit when the display device of FIG. 1 operates in an HMD mode.
7 is a diagram illustrating an example of an operation of the image processing unit of FIG. 4 .
8 is a diagram illustrating an electronic device according to embodiments of the present invention.
9 is a diagram illustrating an example in which the electronic device of FIG. 8 is implemented as a smartphone.
10 is a diagram illustrating an example in which the smartphone of FIG. 9 is implemented as a head mounted display device.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.

1 is a block diagram illustrating a display device according to exemplary embodiments, and FIG. 2 is a diagram illustrating a display panel included in the display device of FIG. 1 . 3 is a diagram showing photoreceptor cell density on the retina.

Referring to FIG. 1 , the display device 100 may include a display panel 110 , an image processor 120 , a data driver 130 , a scan driver 140 , and a timing controller 150 .

The display panel 110 may include a plurality of pixels. A plurality of data lines and a plurality of scan lines may be formed in the display panel 110 , and a plurality of pixels may be formed in a region where the data lines and the scan lines intersect. In an embodiment, each of the pixels may include a pixel circuit, a driving transistor, and an organic light emitting diode. In this case, when the pixel circuit transmits the data signal DATA supplied from the data line to the driving transistor in response to the scan signal SCAN supplied from the scan line, the driving transistor generates an organic light emitting diode based on the data signal DATA. may control a driving current flowing through it, and the organic light emitting diode may emit light based on the driving current.

The image processing unit 120 reduces the deterioration deviation of the image signal IS displayed on the display area DA of the display panel 110 and the dummy area NDA surrounding the display area DA and the display area DA. A dummy image signal ISD may be generated. Recently, a technology for realizing a smartphone as a head mounted display (HMD) device by combining it with a separate electronic device (eg, Samsung's Galaxy Gear VR) has been used. As shown in FIG. 2 , when a smartphone is combined with a separate electronic device and implemented as a head mounted display device, the display device 100 included in the smartphone includes a display area DA and a dummy area NDA. may include In general, the left eye image signal ISL and the right eye image signal ISR may be displayed on the display area DA, and a black image signal may be displayed on the dummy area NDA surrounding the display area DA. When a black image signal is displayed in the dummy area NDA for a long time, deterioration degrees of pixels in the display area DA and the dummy area NDA may be different. That is, the deterioration rate of pixels in the display area DA in which the left eye image signal ISL and the right eye image signal ISR are displayed is faster than that of pixels in the dummy area NDA in which the black image signal is displayed, so that the display area DA luminance may decrease. Accordingly, when the smartphone is operated in the normal mode instead of the head mounted display mode (hereinafter, the HMD mode), a difference in image quality between the display area DA and the dummy area NDA may occur. In order to solve this problem, the display device 100 of FIG. 1 displays a dummy image signal ISD that reduces the deterioration deviation between the display area DA and the dummy area NDA on the dummy area NDA. The display quality of the device 100 may be improved.

About 7 million photoreceptors are distributed in the retina of the human eye, and cone cells are capable of sensing light and color. As shown in FIG. 3 , the cone cells have a maximum density in the center of the retina and decrease in density toward the periphery, so that a user using the head mounted display device may not recognize an image displayed on the dummy area NDA. Accordingly, when the display device 100 of FIG. 1 operates in the HMD mode, the dummy image signal ISD may be displayed on the dummy area NDA.

In an exemplary embodiment, the image processing unit 120 generates a dummy image signal ISD by copying the left eye image signal ISL and the right eye image signal ISR input to a pixel disposed at the outer portion of the display area DA. and the dummy image signal ISD may be sequentially displayed on the dummy area NDA. In another embodiment, the image processing unit 120 generates a dummy image signal ISD having a grayscale value between a preset grayscale value and a black grayscale value, and displays the dummy image signal ISD on the dummy area NDA. can do. In another exemplary embodiment, the image processing unit 120 may be configured to perform a grayscale value between grayscale values and black grayscale values of the left eye image signal ISL and the right eye image signal ISR input to a pixel disposed at the outer portion of the display area DA. A dummy image signal ISD may be generated, and the dummy image signal ISD may be displayed on the dummy area NDA.

Also, the image processing unit 120 divides the dummy area NDA into a first area, a second area, and a third area, and displays the dummy image signal ISD in each of the first area, the second area, and the third area. The speed can be adjusted differently. Hereinafter, the image processing unit 120 will be described in detail with reference to FIGS. 4 to 6 .

The data driver 130 may convert the left eye image signal ISL, the right eye image signal ISR, and the dummy image signal ISD supplied from the image processing unit 120 into the data signal DATA. The scan driver 140 may supply a scan signal SCAN to the pixels through a plurality of scan lines, and the data driver 130 transmits data to the pixels through a plurality of data lines according to the scan signal SCAN. A signal DATA may be supplied.

The timing controller 150 may supply the image signal IS to the image processing unit 120 . In addition, the timing controller 150 generates control signals CTL1 , CTL2 , and CTL3 for controlling the image processor 120 , the scan driver 140 , and the data driver 130 to control the image processor 120 and the scan driver 140 . ) and the data driver 130 , respectively.

The image processing unit 120 may be connected to the timing control unit 150 as shown in FIG. 1 , or may be disposed within the timing control unit 150 . Alternatively, the image processing unit 120 may be connected to the data driver 130 or disposed within the data driver 130 .

As described above, in the display device 100 of FIG. 1 , the dummy image signal ISD is disposed in the dummy area NDA surrounding the display area DA in which the left eye image signal ISL and the right eye image signal ISR are displayed. By displaying , it is possible to reduce a deterioration deviation between the pixels of the display area DA and the pixels of the dummy area NDA. Accordingly, a difference in image quality between the display area DA and the dummy area NDA may be prevented from occurring.

4 is a block diagram illustrating an image processing unit included in the display device of FIG. 1 .

Referring to FIG. 4 , the image processing unit 120 may include an input unit 122 , an image generation unit 124 , a first dummy signal generation unit 126 , and a second dummy signal generation unit 128 . When the display device 100 operates in the HMD mode, the image processing unit 120 generates a left eye image signal ISL, a right eye image signal ISR, a first dummy image signal ISD1 and a second dummy image signal ISD2. can create

The input unit 122 may receive an image signal IS from the timing controller 150 or an external device. The input unit 122 may supply the image signal IS to the image generator 124 or the data driver 130 according to the mode selection signal SEL. The input unit 122 may supply the image signal IS to the image generator 124 when the display device 100 operates in the HMD mode. The input unit 122 may supply the image signal IS to the data driver 130 when the display device 100 operates in a normal mode (eg, a smartphone mode).

The image processor 120 may generate a left-eye image signal ISL and a right-eye image signal ISR based on the image signal IS. The left eye image signal ISL is an image displayed in front of the user's left eye when the display device 100 operates in the HMD mode. The right eye image signal ISR is an image displayed in front of the user's right eye when the display device 100 operates in the HMD mode. The left-eye image signal ISL and the right-eye image signal ISR may be generated by a preset algorithm. For example, the image generator 124 may generate a left-eye image signal ISL and a right-eye image signal ISR by selecting a partial region of the input image signal IS and adjusting the size of the selected region. . The image generator 124 may supply the left eye image signal ISL and the right eye image signal ISR to the data driver 130 , the first dummy signal generator 126 , and the second dummy signal generator 128 . . The left-eye image signal ISL may be displayed on the first display area of the display panel 110 , and the right-eye image signal ISR may be displayed on the second display area of the display panel 110 .

The first dummy signal generator 126 may generate the first dummy image signal ISD1 displayed in the first dummy area surrounding the first display area of the display panel 110 on which the left eye image signal ISL is displayed. can In an exemplary embodiment, the first dummy signal generator 126 may generate the first dummy image signal ISD1 by copying the left eye image signal ISL input to a pixel disposed at the outer portion of the first display area. have. Accordingly, the left eye image signal ISL input to the pixel disposed at the outer portion of the first display area may be sequentially displayed on the first dummy area as the first dummy image signal ISD1 . In another exemplary embodiment, the first dummy signal generator 126 may generate the first dummy image signal ISD1 having a grayscale value between a preset grayscale value and a black grayscale value. For example, the first dummy signal generator 126 may generate the first dummy image signal ISD1 having a grayscale value between a preset grayscale value of 127 and a black grayscale value (ie, a grayscale of 0). Accordingly, the first dummy image signal ISD1 having a gray value between 0 and 127 gray levels may be displayed in the first dummy area. In another exemplary embodiment, the first dummy signal generator 126 includes a first dummy signal generator 126 having a grayscale value between a grayscale value of the left eye image signal ISL input to a pixel disposed at the outermost portion of the first display area and a black grayscale value. A dummy image signal ISD1 may be generated. For example, when the grayscale value of the left eye image signal ISL input to the outermost pixel of the first display area is 50, the first dummy signal generator 126 generates a grayscale between 50 grayscale and 0 grayscale. A first dummy image signal ISD1 having a value may be generated. Accordingly, the first dummy image signal ISD1 having a grayscale value between 50 and 0 grayscale may be displayed in the first dummy area.

Also, the first dummy signal generator 126 divides the first dummy region into a first region, a second region, and a third region, and provides a first dummy image in each of the first region, the second region, and the third region. The speed at which the signal ISD1 is displayed can be adjusted differently. In this case, the sizes of the first region, the second region, and the third region of the first dummy region surrounding the first display region may be different. The first dummy signal generator 126 is configured to display the first dummy image signal ISD1 in the same direction (outward or inward of the display area) or not displayed in the first dummy area in the first area and in the second area. and a display speed of the first dummy image signal ISD1 in each of the third regions may be differently controlled.

The second dummy signal generator 128 may generate the second dummy image signal ISD2 displayed in the second dummy area surrounding the second display area of the display panel 110 on which the right eye image signal ISR is displayed. can In an exemplary embodiment, the second dummy signal generator 128 may generate the second dummy image signal ISD2 by copying the right eye image signal ISR input to the pixel disposed at the outer portion of the second display area. have. Accordingly, the right eye image signal ISR input to the pixel disposed at the outer portion of the second display area may be sequentially displayed on the first dummy area as the second dummy image signal ISD2 . In another exemplary embodiment, the second dummy signal generator 128 may generate the second dummy image signal ISD2 having a grayscale value between a preset grayscale value and a black grayscale value. For example, the second dummy signal generator 128 may generate the second dummy image signal ISD2 having a grayscale value between a preset grayscale value of 127 and a black grayscale value (that is, grayscale 0). Accordingly, the second dummy image signal ISD2 having a gray value between 0 and 127 gray levels may be displayed in the second dummy area. In another exemplary embodiment, the second dummy signal generator 128 may include a second grayscale value between the grayscale value of the left eye image signal ISL input to the pixel disposed at the outermost portion of the second display area and the black grayscale value. A dummy image signal ISD2 may be generated. For example, when the grayscale value of the left eye image signal ISL input to the outermost pixel of the second display area is 50, the second dummy signal generator 128 generates a grayscale between 50 grayscale and 0 grayscale. A second dummy image signal ISD2 having a value may be generated. Accordingly, the second dummy image signal ISD2 having a grayscale value between 50 and 0 grayscale may be displayed in the second dummy area.

Also, the second dummy signal generator 128 divides the second dummy region into a first region, a second region, and a third region, and provides a second dummy image in each of the first region, the second region, and the third region. The speed at which the signal ISD2 is displayed can be adjusted differently. In this case, the sizes of the first region, the second region, and the third region of the second dummy region surrounding the second display region may be different. The second dummy signal generator 128 is configured to display the second dummy image signal ISD2 in the same direction (outward or inward of the display area) or not displayed in the second dummy area in the first area and the second area. and a speed at which the second dummy image signal ISD2 is displayed in each of the third regions may be differently controlled.

As described above, when the display device 100 operates in the HMD mode, the image processing unit 120 generates a left eye image signal ISL and a right eye image signal ISR, and displays the left eye image signal ISL. The first dummy image signal ISD1 and the second dummy image signal ISD2 are respectively disposed in the first dummy area surrounding the first display area and the second dummy area surrounding the second display area in which the right eye image signal ISR is displayed. ), it is possible to reduce a deterioration deviation between the pixels of the first and second display areas and the pixels of the first and second dummy areas.

5 is a diagram illustrating a display panel when the display device of FIG. 1 operates in the HMD mode, and FIGS. 6A and 6B are diagrams illustrating an example of an operation of the image processing unit when the display device of FIG. 1 operates in the HMD mode to be.

Referring to FIG. 5 , when the display device 100 operates in the HMD mode, the display panel 110 includes a left eye image signal ISL, a right eye image signal ISR, a first dummy image signal ISD1, and a second dummy image signal ISD1. A dummy image signal ISD2 may be displayed. The left-eye image signal ISL generated by the image generator 124 may be displayed on the first display area DA1 , and the right-eye image signal ISR may be displayed on the second display area DA2 . In addition, the first dummy image signal ISD1 generated by the first dummy signal generator 126 is displayed in the first dummy area NDA1 , and the second dummy image generated by the second dummy signal generator 128 . The signal ISD2 may be displayed in the second dummy area NDA2 .

Referring to FIG. 6A , the first dummy image signal ISD1 may be sequentially displayed from the first dummy area NDA11 adjacent to the first display area DA1 to the outermost first dummy area NDA14. Also, the second dummy image signal ISD2 may be sequentially displayed from the second dummy area NDA21 adjacent to the second display area DA2 to the outermost second dummy area NDA24.

Referring to FIG. 6B , the first dummy image signal ISD1 may not be sequentially displayed from the outermost first dummy area NDA14 to the first dummy area NDA11 adjacent to the first display area DA1. . Also, the second dummy image signal ISD2 may not be sequentially displayed from the outermost second dummy area NDA24 to the second dummy area NDA21 adjacent to the second display area DA2 .

In an exemplary embodiment, the first dummy image signal ISD1 may be a signal obtained by copying the left eye image signal ISL input to a pixel disposed at the outer portion of the first display area DA1 . For example, the first dummy signal generator 126 copies the left-eye image signal ISL displayed in at least one pixel row and at least one pixel column disposed at the outer portion of the first display area DA1 to obtain the second dummy signal. It may be generated as one dummy image signal ISD1 and displayed on the first dummy areas NDA11, NDA12, NDA13, and NDA14, respectively. Alternatively, the first dummy signal generator 126 may not sequentially display the first dummy image signal ISD1 displayed in each of the first dummy areas NDA11 , NDA12 , NDA13 , and NDA14 .

Also, the second dummy image signal ISD2 may be a signal obtained by copying the right eye image signal ISR input to a pixel disposed at the outer portion of the second display area DA2 . For example, the second dummy signal generator 128 copies the right eye image signal ISR displayed in at least one pixel row and at least one pixel column disposed at the outer portion of the second display area DA2 to generate the second dummy signal. The second dummy image signal ISD2 may be generated and displayed on the second dummy areas NDA21, NDA22, NDA23, and NDA24, respectively. Alternatively, the second dummy image signal generator 128 may not sequentially display the second dummy image signal ISD2 displayed in each of the second dummy areas NDA21 , NDA22 , NDA23 , and NDA24 .

In another exemplary embodiment, the first dummy image signal ISD1 may have a grayscale value between a preset grayscale value and a black grayscale value. For example, the first dummy signal generator 126 may generate the first dummy image signal ISD1 having a grayscale value between a preset grayscale value of 127 and a black grayscale value (ie, grayscale 0). The first dummy signal generator 126 may generate the first dummy image signal ISD1 having different grayscale values. For example, the first dummy signal generator 126 generates the first dummy image signals ISD1 having 127 grayscale, 97 grayscale, 67 grayscale, and 0 grayscale, and the first dummy areas NDA11, NDA12, NDA13, NDA14), respectively. Alternatively, the first dummy signal generator 126 may not sequentially display the first dummy image signal ISD1 displayed in each of the first dummy areas NDA11 , NDA12 , NDA13 , and NDA14 .

Also, the second dummy image signal ISD2 may have a grayscale value between a preset grayscale value and a black grayscale value. For example, the second dummy signal generator 128 may generate the second dummy image signal ISD2 having a grayscale value between a preset grayscale value of 127 and a black grayscale value (ie, a grayscale of 0). The second dummy signal generator 128 may generate the second dummy image signal ISD2 having different grayscale values. For example, the second dummy signal generator 128 generates the second dummy image signals ISD2 having 127 grays, 97 grays, 67 grays, and 0 grays, and the second dummy areas NDA21, NDA22, NDA23, NDA24), respectively. Alternatively, the second dummy image signal generator 128 may not sequentially display the second dummy image signal ISD2 displayed in each of the second dummy areas NDA21 , NDA22 , NDA23 , and NDA24 .

In another exemplary embodiment, the first dummy image signal ISD1 may have a grayscale value between a grayscale value of the left eye image signal ISL input to a pixel disposed at the outermost portion of the first display area DA1 and a black grayscale value. can For example, when the grayscale value of the left eye image signal ISL input to the outermost pixel of the first display area DA1 is 200, the first dummy signal generator 126 may generate 200 grayscales and black grayscales. The first dummy image signal ISD1 having a grayscale value between values (ie, 0 grayscale) may be generated. The first dummy signal generator 126 may generate the first dummy image signal ISD1 having different grayscale values. For example, the first dummy signal generator 126 generates the first dummy image signals ISD1 having 200 grayscale, 130 grayscale, 60 grayscale, and 0 grayscale, and the first dummy areas NDA11, NDA12, NDA13, NDA14), respectively. Alternatively, the first dummy signal generator 126 may not sequentially display the first dummy image signal ISD1 displayed in each of the first dummy areas NDA11 , NDA12 , NDA13 , and NDA14 .

Also, the second dummy image signal ISD2 may have a grayscale value between a grayscale value of the right eye image signal ISR input to a pixel disposed at the outermost portion of the second display area DA2 and a black grayscale value. . For example, when the grayscale value of the right eye image signal ISR input to the outermost pixel of the second display area DA2 is 200, the second dummy signal generator 128 generates 200 grayscales and black grayscales. The second dummy image signal ISD2 having a grayscale value between values (ie, 0 grayscale) may be generated. The second dummy signal generator 128 may generate the second dummy image signal ISD2 having different grayscale values. For example, the second dummy signal generator 128 generates second dummy image signals ISD2 having 200 grayscale, 130 grayscale, 60 grayscale, and 0 grayscale, and the second dummy areas NDA21, NDA22, NDA23, NDA24), respectively. Alternatively, the second dummy image signal generator 128 may not sequentially display the second dummy image signal ISD2 displayed in each of the second dummy areas NDA21 , NDA22 , NDA23 , and NDA24 .

As such, the image processing unit 120 sequentially applies the first dummy image signal ISD1 and the second dummy image signal ISD2 to the first dummy area NDA1 and the second dummy area NDA2 of the display panel 110 . By displaying , or not sequentially displaying, the boundary between the first and second display areas DA1 and DA2 and the first and second dummy areas NDA1 and NDA2 may be blurred.

7 is a diagram illustrating an example of an operation of the image processing unit of FIG. 4 .

Referring to FIG. 7 , the display panel 110 may include first and second display areas DA1 and DA2 and first and second dummy areas NDA1 and NDA2. The first dummy signal generator 126 and the second dummy signal generator 128 divide the first dummy area NDA1 and the second dummy area NDA2 into a first zone Z1 , a second zone Z2 and It can be divided into a third zone (Z3). The first dummy signal generator 126 and the second dummy signal generator 128 provide a first dummy image signal ISD1 to each of the first zone Z1 , the second zone Z2 , and the third zone Z3 . and a display speed of the second dummy image signal ISD2 may be differently adjusted. In the first dummy area NDA1 and the second dummy area NDA2 , the sizes of the first zone Z1 , the second zone Z2 , and the third zone Z3 may be different. The human eye has a similar visual field range that can be recognized left and right, but a different field of view that can be recognized up and down. That is, the human eye may be recognized wider as the lower side than the upper side. Accordingly, the size of the second area Z2 of the first dummy area NDA1 and the second dummy area NDA2 may be set to be wider than the size of the third area Z3 .

The first dummy signal generator 126 applies the first dummy image signal ISD1 to the first zone Z1, the second zone Z2, and the third zone Z3 in the same direction (ie, the first display area ( The speed at which the first dummy image signal ISD1 is displayed in each of the first zone Z1, the second zone Z2, and the third zone Z3 in order to display or not display in the outward or inward direction of DA1) can be adjusted differently. For example, the first region Z1 may include n pixel rows, the second region Z2 may include m pixel rows, and the third region Z3 may include k pixel rows. . In this case, the first dummy signal generator 126 displays the first dummy image signal ISD1 outward of the first display area DA1 at a rate of n/t in the first zone Z1 during the t frame. and display the first dummy image signal ISD1 outward of the first display area DA1 at a speed of m/t in the second zone Z2 and a speed of k/t in the third zone Z3 Thus, the first dummy image signal ISD1 may be displayed outside the first display area DA1. Also, the first dummy signal generator 126 generates the first dummy image signal ISD1 from the outermost portion of the first dummy area NDA1 at a rate of n/t in the first region Z1 for the next t frame. It may not be displayed, and the first dummy image signal ISD1 may not be displayed from the outermost portion of the first dummy area NDA1 at a speed of m/t in the second zone Z2 , and may not be displayed in the third zone Z3 ), the first dummy image signal ISD1 may not be displayed from the outermost portion of the first dummy area NDA1 at a speed of k/t.

The second dummy signal generator 128 applies the second dummy image signal ISD2 to the first zone Z1, the second zone Z2, and the third zone Z3 in the same direction (ie, the second display area ( The speed at which the second dummy image signal ISD2 is displayed in each of the first zone Z1, the second zone Z2, and the third zone Z3 in order to display or not display in the outward or inward direction of DA2) can be adjusted differently. For example, the first region Z1 may include n pixel rows, the second region Z2 may include m pixel rows, and the third region Z3 may include k pixel rows. . In this case, the second dummy signal generator 128 displays the second dummy image signal ISD2 out of the second display area DA2 at a rate of n/t in the first zone Z1 for the t frame. and display the second dummy image signal ISD2 outward of the second display area DA2 at a speed of m/t in the second zone Z2 and a speed of k/t in the third zone Z3 Thus, the second dummy image signal ISD2 may be displayed outside the second display area DA2 . In addition, the second dummy signal generator 128 generates the second dummy image signal ISD2 from the outermost portion of the second dummy area NDA2 at a rate of n/t in the first zone Z1 for the next t frame. It may not be displayed, and the second dummy image signal ISD2 may not be displayed from the outermost portion of the second dummy area NDA2 at a speed of m/t in the second zone Z2 , and may not be displayed in the third zone Z3 ), the second dummy image signal ISD2 may not be displayed from the outermost portion of the second dummy area NDA2 at a speed of k/t.

8 is a diagram illustrating an electronic device according to embodiments of the present invention. 9 is a diagram illustrating an example in which the electronic device of FIG. 8 is implemented as a smartphone, and FIG. 10 is a diagram illustrating an example in which the smartphone of FIG. 9 is implemented as a head mounted display device.

Referring to FIG. 8 , the electronic device 200 may include a processor 210 , a memory device 220 , a storage device 230 , an input/output device 240 , a power supply 250 , and a display device 260 . have. Furthermore, the electronic device 200 may further include various ports capable of communicating with a video card, a sound card, a memory card, a USB device, and the like, or communicating with other systems. Meanwhile, as shown in FIG. 9 , the electronic device 200 may be implemented as a smartphone 300 , but the electronic device 200 is not limited thereto.

The processor 210 may perform certain calculations or tasks. In one embodiment, the processor 210 may be a microprocessor, a central processing unit (CPU), or the like. The processor 210 may be connected to other components through an address bus, a control bus, and a data bus. The processor 210 may also be connected to an expansion bus, such as a Peripheral Component Interconnect (PCI) bus. The memory device 220 may store data necessary for the operation of the electronic device 200 . For example, the memory device 220 may include EPROM, EEPROM, flash memory, phase change random access memory (PRAM), resistance random access memory (RRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), and the like. It may include a non-volatile memory device and/or a volatile memory device such as dynamic random access memory (DRAM), static random access memory (SRAM), mobile DRAM, and the like. The storage device 230 may include a solid state drive (SSD), a hard disk drive (HDD), a CD-ROM, and the like.

The input/output device 240 may include an input means such as a keyboard, a keypad, a touch pad, a touch screen, a mouse, and the like, and an output means such as a speaker, a printer, and the like. The display device 260 may be provided in the input/output device 240 . The power supply 250 may supply power required for the operation of the electronic device 200 . The display device 260 may be connected to other components through the buses or other communication links.

Referring to FIG. 9 , the electronic device 200 may be implemented as a smartphone 300 . In this case, the display device 260 of FIG. 8 may correspond to the display device 100 of FIG. 1 . As shown in FIG. 10 , the smartphone 300 is combined with a separate electronic device 350 (eg, Samsung's Galaxy Gear VR) to form a Head Mounted Display (HMD) device 400 . can be implemented. When the smartphone 300 operates as the head mounted display device 400 , the display device 260 of the smartphone 300 generates a left eye image signal and a right eye image signal based on an input image signal, and displays them. can be displayed on the panel. In this case, when the black image signal is displayed in the dummy area surrounding the display area in which the left eye image signal and the right eye image signal are displayed, the degree of deterioration of the pixels of the display area and the dummy area may be different. Accordingly, when the smartphone 300 operates in the normal mode, a difference may occur in display quality between the display area and the dummy area. In order to solve this problem, the smart phone 300 of FIG. 9 includes a display device 260 that displays a dummy image signal that reduces the deterioration deviation from the display area in the dummy area in the HMD mode, so that the smart phone 300 . display quality can be improved. Hereinafter, the display device 260 will be described in detail.

The display device 260 may include a display panel, an image processor, a data driver, a scan driver, and a timing controller.

The display panel may include a plurality of pixels. A plurality of data lines and a plurality of scan lines may be formed in the display panel, and a plurality of pixels may be formed in a region where the data lines and the scan lines cross each other.

The image processor may generate an image signal displayed on the display area of the display panel and a dummy image signal displayed on a dummy area surrounding the display area. The dummy image signal may reduce a deterioration deviation between the display area and the dummy area. In an embodiment, the image processing unit may generate a dummy image signal by copying a left-eye image signal and a right-eye image signal input to a pixel disposed at an outer portion of the display area, and sequentially display the dummy image signal on the dummy area. have. In another embodiment, the image processing unit may generate a dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and display the dummy image signal in the dummy area. In another exemplary embodiment, the image processing unit generates a dummy image signal having a grayscale value between a grayscale value between a grayscale value of a left-eye image signal and a right-eye image signal input to a pixel disposed at an outer portion of the display area and a black grayscale value, and the dummy image Signals can be displayed in the dummy area. Also, the image processing unit may divide the dummy area into a first zone, a second zone, and a third zone, and may differently adjust a display speed of the dummy image signal in each of the first zone, the second zone, and the third zone.

The data driver may convert the left eye image signal, the right eye image signal, and the dummy image signal supplied from the image processing unit into a data signal. The scan driver may supply a scan signal to the pixels through a plurality of scan lines, and the data driver may supply a data signal to the pixels through a plurality of data lines according to the scan signal. The timing controller may generate control signals for controlling the image processor, the scan driver, and the data driver.

The image processing unit may be connected to the timing control unit or disposed within the timing control unit. Alternatively, the image processing unit may be connected to the data driver or disposed within the data driver.

As described above, the electronic device 200 of FIG. 8 may be implemented as a smartphone 300 . When the smartphone 300 is combined with a separate device to operate as the head mounted display device 400 , the display device 260 of the smartphone 300 may operate in the HMD mode. The display device 260 generates a left-eye image signal and a right-eye image signal based on the input image signal in the HMD mode, and displays the dummy image signal displayed in the dummy area surrounding the display area in which the left-eye image signal and the right-eye image signal are displayed. can create In this case, the display device 260 displays a dummy image signal capable of reducing a deterioration difference between pixels of the display area and the dummy area on the dummy area while the smartphone 300 operates as a head mounted display device HMD. , a difference in deterioration between the display area and the dummy area may be reduced. Accordingly, even when the smartphone 300 of FIG. 9 operates in the normal mode, the display device 260 may not have a difference in image quality due to a difference in deterioration between the display area and the dummy area.

The present invention can be applied to any electronic device having a display device. For example, the present invention can be applied to a television, a computer monitor, a notebook computer, a digital camera, a mobile phone, a smart phone, a smart pad, a tablet PC, a PDA, a PMP, an MP3 player, a navigation system, a video phone, and the like.

Although the above has been described with reference to exemplary embodiments of the present invention, those of ordinary skill in the art may vary the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below. It will be understood that modifications and changes can be made to

100: display device 110: display panel
120: image processing unit 122: input unit
124: image generating unit 126: first dummy signal generating unit
128: second dummy signal generator 130: data driver
140: scan driver 150: timing controller
200: electronic device 300: smartphone
400: head mounted display device

Claims (20)

a display panel including a plurality of pixels;
an image processing unit configured to generate an image signal displayed on a display area of the display panel and a dummy image signal for reducing a deterioration deviation between the display area and a dummy area surrounding the display area;
a data driver supplying a data signal to the pixels;
a scan driver supplying a scan signal to the pixels; and
a timing controller for generating control signals for controlling the image processor, the data driver, and the scan driver;
The image processing unit
a first dummy signal generator configured to generate a first dummy image signal displayed in a first dummy area surrounding a first display area of the display panel on which a left eye image signal is displayed; and
and a second dummy signal generator configured to generate a second dummy image signal displayed in a second dummy area surrounding the second display area of the display panel where the right eye image signal is displayed. According to claim 1, wherein the image processing unit
an input unit for receiving the video signal; and
and an image generator configured to generate the left-eye image signal and the right-eye image signal based on the image signal. 3. The method of claim 2, wherein the first dummy signal generator generates the first dummy image signal by copying the left-eye image signal input to a pixel disposed at an outer portion of the first display area, and generates the first dummy image. and sequentially displaying signals on the first dummy area. The method of claim 2 , wherein the second dummy signal generator generates the second dummy image signal by copying the right eye image signal input to a pixel disposed at an outer portion of the second display area, and generates the second dummy image. and sequentially displaying signals on the second dummy area. The method of claim 2, wherein the first dummy signal generator generates the first dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the first dummy image signal to the first dummy area. A display device, characterized in that for display. The method of claim 2, wherein the second dummy signal generator generates the second dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the second dummy image signal to the second dummy area. A display device, characterized in that for display. The first dummy image of claim 2 , wherein the first dummy signal generator has a grayscale value between a grayscale value and a black grayscale value of the left eye image signal input to a pixel disposed at an outermost portion of the first display area. The display device of claim 1, wherein the signal is generated and the first dummy image signal is displayed on the first dummy area. The second dummy image of claim 2 , wherein the second dummy signal generator has a grayscale value between a grayscale value of the right eye image signal input to a pixel disposed at an outermost portion of the second display area and a black grayscale value. The display device of claim 1, wherein the signal is generated and the second dummy image signal is displayed on the second dummy area. The method of claim 2, wherein the first dummy signal generator divides the first dummy region into a first region, a second region, and a third region, and divides the first dummy region into a first region, a second region, and a third region. The display device of claim 1, wherein the speed at which the first dummy image signal is displayed is adjusted to be different. 3. The method of claim 2, wherein the second dummy signal generator divides the second dummy region into a first region, a second region, and a third region, and divides the second dummy region into a first region, a second region, and a third region. The display device according to claim 1, wherein the speed at which the right eye image signal is displayed is differently adjusted. An electronic device comprising a display device and a processor for controlling the display device, wherein the display device comprises:
a display panel including a plurality of pixels;
an image processing unit configured to generate an image signal displayed on a display area of the display panel and a dummy image signal for reducing a deterioration deviation between the display area and a dummy area surrounding the display area;
a data driver supplying a data signal to the pixels;
a scan driver supplying a scan signal to the pixels; and
a timing controller for generating control signals for controlling the image processor, the data driver, and the scan driver,
The image processing unit
a first dummy signal generator configured to generate a first dummy image signal displayed in a first dummy area surrounding a first display area of the display panel on which a left eye image signal is displayed; and
and a second dummy signal generator configured to generate a second dummy image signal displayed in a second dummy area surrounding the second display area of the display panel where the right eye image signal is displayed. 12. The method of claim 11, wherein the image processing unit
an input unit for receiving the video signal; and
The electronic device of claim 1, further comprising an image generator configured to generate the left-eye image signal and the right-eye image signal based on the image signal. The method of claim 12 , wherein the first dummy signal generator generates the first dummy image signal by copying the left-eye image signal input to a pixel disposed at an outer portion of the first display area, and generates the first dummy image. The electronic device of claim 1, wherein signals are sequentially displayed on the first dummy area. 13. The method of claim 12, wherein the second dummy signal generator generates the second dummy image signal by copying the right eye image signal input to a pixel disposed at an outer portion of the second display area, and generates the second dummy image. The electronic device of claim 1, wherein signals are sequentially displayed on the second dummy area. 13. The method of claim 12, wherein the first dummy signal generator generates the first dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the first dummy image signal to the first dummy area. An electronic device characterized in that it is displayed. 13. The method of claim 12, wherein the second dummy signal generator generates the second dummy image signal having a grayscale value between a preset grayscale value and a black grayscale value, and applies the second dummy image signal to the second dummy area. An electronic device characterized in that it is displayed. The first dummy image of claim 12 , wherein the first dummy signal generator has a grayscale value between a grayscale value of the left-eye image signal input to a pixel disposed at an outermost portion of the first display area and a black grayscale value The electronic device of claim 1, wherein the signal is generated and the first dummy image signal is displayed on the first dummy area. The second dummy image of claim 12 , wherein the second dummy signal generator has a grayscale value between a grayscale value of the right eye image signal input to a pixel disposed at an outermost portion of the second display area and a black grayscale value. The electronic device of claim 1, wherein the signal is generated and the second dummy image signal is displayed on the second dummy area. 13. The method of claim 12, wherein the first dummy signal generator divides the first dummy region into a first region, a second region, and a third region, and divides the first dummy region into a first region, a second region, and a third region. The electronic device of claim 1, wherein the display speed of the first dummy image signal is differently adjusted. 13. The method of claim 12, wherein the second dummy signal generator divides the second dummy region into a first region, a second region, and a third region, and divides the second dummy region into a first region, a second region, and a third region. The electronic device of claim 1, wherein the speed at which the right eye image signal is displayed is differently adjusted.

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