Display device, electronic device, and moving body

Abstract

The display device displays an image in which each frame is formed of at least two sub-frames. The display device includes: a driving unit configured to drive a plurality of pixels in a pixel array to drive at least two rows of pixels based on pixel data of each row of the supplied respective sub-frame data. The driving unit drives the plurality of pixels so that pixels of rows inconsistent with the rows in the currently supplied sub-frame data emit light under a first condition, and pixels of rows consistent with the rows in the current sub-frame data emit light under a second condition. The second condition is a condition in which the amount of light emission is greater than that in the first condition when pixels emit light according to the same pixel value.

Description

Technical Field

[0001] The present invention relates to a display device, an electronic device, and a moving body. Background Art

[0002] There is a display device that drives pixels by a multi-line driving method for driving pixels of two or more rows using pixel data of each row, in order to reduce the amount of input data and shorten the time required for frame display. In the multi-line driving method, for each sub-frame, two or more rows to which pixel data of each row are to be supplied are changed to allocate an original image and an interpolated image, thereby improving visibility. Since the human visual sense is not as sensitive as the driving cycle of the display, what a person perceives is an image obtained by integrating and averaging the original image and the interpolated image.

[0003] Patent Document 1 proposes a method of improving image quality by performing correction so that the average luminance value between two consecutive sub-frames becomes equal to the original luminance value. However, with the method described in Patent Document 1, a memory for holding the luminance of the previous frame for one frame period is required, which increases the circuit scale.

[0004] Citation List

[0005] Patent Document

[0006] Patent Document 1: JP-A-2003-532145 Summary of the Invention

[0007] Technical Problem

[0008] The present invention provides a technique that is advantageous for improving the quality of a displayed image with a simple arrangement.

[0009] Technical Means for Solving the Problem

[0010] One aspect of the present invention relates to a display device configured to display an image in which each frame is formed of at least two sub-frames, and the display device includes: a driving unit configured to drive a plurality of pixels in a pixel array to drive at least two rows of pixels based on pixel data of each row of the supplied respective sub-frame data, wherein the driving unit drives the plurality of pixels so that pixels of a row inconsistent with the row in the currently supplied sub-frame data emit light under a first condition, and pixels of a row consistent with the row in the currently supplied sub-frame data emit light under a second condition, the second condition being a condition in which the amount of light emitted when pixels emit light according to the same pixel value is greater than that under the first condition.

[0011] Advantageous Effects of the Invention

[0012] According to the present invention, a technique that is advantageous for improving the quality of a displayed image with a simple arrangement is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a diagram showing the arrangement of a display device according to a comparative example;

[0014] Figure 2 is a diagram showing the operation of a display device according to a comparative example;

[0015] Figure 3 is a diagram schematically showing image data supplied to a display device;

[0016] Figure 4 is a diagram showing the arrangement of a display device according to a first embodiment;

[0017] Figure 5 is a diagram showing the operation of a display device according to a first embodiment;

[0018] Figure 6 is a diagram exemplarily showing the amount of light in a comparative example and a first embodiment;

[0019] Figure 7A is a diagram for comparing the operations in a comparative example and a first embodiment;

[0020] Figure 7B is a diagram for comparing the operations in a comparative example and a first embodiment;

[0021] Figure 7C is a diagram for comparing the operations in a comparative example and a first embodiment;

[0022] Figure 7D is a diagram for comparing the operations in a comparative example and a first embodiment;

[0023] Figure 7E is a diagram for comparing the operations in a comparative example and a first embodiment;

[0024] Figure 8 is a diagram showing the arrangement of a display device according to a second embodiment;

[0025] Figure 9 is a diagram showing the operation of a display device according to a second embodiment;

[0026] Figure 10 is a diagram showing an application example of a display device according to an embodiment;

[0027] Figure 11A is a diagram showing an application example of a display device according to an embodiment;

[0028] Figure 11B is a diagram showing an application example of a display device according to an embodiment;

[0029] Figure 12A is a diagram showing an application example of a display device according to an embodiment;

[0030] Figure 12B is a diagram showing an application example of a display device according to an embodiment;

[0031] Figure 13A is a diagram showing an application example of a display device according to an embodiment;

[0032] Figure 13B is a diagram showing an application example of a display device according to an embodiment;

[0033] Figure 14A is a diagram showing an application example of a display device according to an embodiment; and

[0034] Figure 14B is a diagram showing an application example of a display device according to an embodiment. Detailed Description of the Invention

[0035] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the following embodiments are not intended to limit the claims of the present invention, and all combinations of aspects described according to the following embodiments are not necessarily essential for the means of solving the problems according to the present invention.

[0036] Figure 1 Shows the arrangement of a display device DD1 according to a comparative example. The display device DD1 has a function of displaying an image in which each frame is formed of at least two sub-frames. The display device DD1 may include a pixel array 10, a vertical scan control unit 11, a determination unit 12, a light emission period control unit 13, and a horizontal scan control unit 14. The display device DD1 may drive the pixel array 10 by a multi-line driving method for simultaneously driving at least two rows of pixels. For simplicity, an example of simultaneously driving two rows of pixels will be described here.

[0037] The pixel array 10 includes a plurality of pixels arranged to form multiple rows and multiple columns. In Figure 1 , pixels 101, 102, and 103 respectively arranged in the (N-1)-th row, the N-th row, and the (N+1)-th row are representatively shown. When describing a plurality of pixels without distinguishing them from each other, these pixels will be described as pixel 10 x . This also applies to other components. Each pixel 10 x may include transistors Tr1, Tr2, and Tr3, a capacitor C, and a light emitting element EL (e.g., an organic EL element).

[0038] The gate of the transistor Tr1 is connected to a vertical scan line VSL driven by the vertical scan control unit 11 x (..., VSLN-1 , VSL N , VSL N+1 ). When writing pixel signals in the capacitor C through the data DL x (DL1, DL2,...), the vertical scan line VSL x is activated. The transistor Tr2 supplies a current corresponding to the pixel signal written in the capacitor C to the light-emitting element EL. The gate of the transistor Tr3 is connected to the emission period signal line EP x (..., EP N-1 , EP N , EP N+1 ) driven by the emission period control unit 13 to control the emission period of the light-emitting element EL.

[0039] The image data ID of each frame supplied to the display device DD1 may include even sub-frame data as data of an even sub-frame and odd sub-frame data as data of an odd sub-frame. When writing pixel data of even sub-frame data, the transistors Tr1 of the pixels 101 and 102 in the N-1th row and the Nth row are driven so that the pixels 101 and 102 in the N-1th row and the Nth row are driven simultaneously. When writing pixel data of odd sub-frame data, the transistors Tr1 of the pixels 102 and 103 in the Nth row and the N+1th row are driven so that the pixels 102 and 103 in the Nth row and the N+1th row are driven simultaneously. To achieve this, the vertical scan control unit 11 includes a plurality of selection units 11 x (111, 112, and 113).

[0040] The plurality of selection units 11 x may be arranged such that one selection unit 11 x is assigned to one row. The image data ID of each frame is supplied to the determination unit 12. For each frame, the determination unit 12 may determine one of the two sub-frames forming the frame to which the currently supplied sub-frame data belongs, and output selection signals RAS and RSB indicating the determination result. The currently supplied sub-frame data may be even sub-frame data or odd sub-frame data. The selection signals RSA and RSB are complementary or exclusive signals, and the selection signal RSB may be an inverted signal of the selection signal RSA. When writing pixel data of even sub-frame data, the determination unit 12 may drive the selection signal RSB to an effective level and drive the selection signal RSA to an ineffective level. When writing pixel data of odd sub-frame data, the determination unit 12 may drive the selection signal RSA to an effective level and drive the selection signal RSB to an ineffective level. If each frame is formed of at least two sub-frames, the determination unit 12 may be configured to determine one of the at least two sub-frames forming the frame to which the current sub-frame data belongs.

[0041] Each selection unit 11 of the vertical scan control unit 11 x may be formed by a multiplexer that outputs a signal having the same logic level as the input signal specified from the first and second input signals by a selection signal. The selection unit 11 to which the selection signal RSA is input x may output a signal having the same logic level as the first input signal when the selection signal RSA is at an effective level, and may output a signal having the same logic level as the second input signal when the selection signal RSA is at an invalid level. The selection unit 11 to which the selection signal RSB is input x may output a signal having the same logic level as the first input signal when the selection signal RSB is at an effective level, and may output a signal having the same logic level as the second input signal when the selection signal RSB is at an invalid level. Each selection unit 11 x drives the corresponding row of the vertical scan lines VSL through its output x . For example, when writing pixel data of an even sub-frame, the selection unit 112 assigned to the Nth row outputs a signal having the same logic level as the row selection signal R N to the vertical scan signal line VSL N .

[0042] In order to write a pixel signal (i.e., charge or discharge) into the capacitor C for controlling the emission luminance of each pixel 10 x , the horizontal scan control unit 14 outputs the pixel signal to the data lines DL of each column x . Here, when writing pixel data of an even sub-frame, the pixel signal P N corresponding to the pixel data of the Nth row of the even sub-frame data is written into the capacitors C of the pixels 101 and 102 of the Nth and (N - 1)th rows. That is, the pixel signal P N corresponding to the pixel data of the Nth row is written into the capacitor C of the pixel 102 of the Nth row, and the pixel signal P N corresponding to the pixel data of the pixel 102 (adjacent to the pixel 101) of the Nth row is also written into the capacitor C of the pixel 101 of the (N - 1)th row. When writing pixel data of an odd sub-frame, the pixel signal P N+1 corresponding to the pixel data of the (N + 1)th row of the odd sub-frame data is written into the capacitors C of the pixels 102 and 103 of the Nth and (N + 1)th rows. That is, the pixel signal P N+1 corresponding to the pixel data of the (N + 1)th pixel 103 (adjacent to the pixel 102) is written into the capacitor C of the pixel 102 of the Nth row, and the pixel signal P N+1is also written into the capacitor C of the pixel 102 in the N+1-th row.

[0043] According to the multi-line driving as described above, during two sub-frame periods, the light emission of the pixel 102 in the N-th row is perceived by a person as light emission corresponding to P N / 2 + P N+1 / 2. Here, it is assumed that the image data ID is for a still image (repetition of a single image), and the luminance levels of the pixels in the N-1-th row, N-th row, and N+1-th row are 20, 20, and 80, respectively. In this case, the light emission of the pixel 102 in the N-th row is perceived as the integral average of 20, 20, and 80, that is, the luminance is 50. Therefore, a deviation from the original pixel data with a luminance level of 20 occurs, and image quality degradation occurs.

[0044] Referring to Figure 4 , the display device DD2 according to the first embodiment will be described below. Note that matters not mentioned as the arrangement and operation of the display device DD2 according to the first embodiment can follow the arrangement and operation of the display device DD1 according to the above comparative example. The display device DD2 according to the first embodiment can have a function of displaying an image in which each frame is formed by at least two sub-frames. The display device DD2 can include a pixel array 10, a driving unit DRV configured to drive the pixel array 10, and a determination unit 12. The driving unit DRV can include a vertical scan control unit 11, a light emission period control unit 23, and a horizontal scan control unit 14. The display device DD2 can drive the pixel array 10 by a multi-line driving method for simultaneously driving at least two rows of pixels. For simplicity, an example of simultaneously driving two rows of pixels will be described here.

[0045] Figure 3 Schematically shows the image data ID supplied to the display device DD2 (and the display device DD1). For simplicity, Figure 3 shows the (N-3)-th row, (N-2)-th row, N-1-th row, N-th row, N+1-th row, and (N+2)-th row of one frame of the image data ID. One frame of the image data ID can be formed by two sub-frame data, more specifically, even sub-frame data and odd sub-frame data. The even sub-frame data can be formed by pixel data of rows including the (N-2)-th row, N-th row, (N+2)-th row, etc., while the odd sub-frame data can be formed by pixel data of rows including the (N-3)-th row, N-1-th row, N+1-th row, etc.

[0046] For each frame, the determination unit 12 can determine, based on the image data ID or a signal accompanying the image data ID, one of at least two sub-frames (here, the even sub-frame and the odd sub-frame) that form the frame to which the supplied current sub-frame data belongs. For example, if the image data ID is supplied as an interlace signal, this determination can be made using the characteristic that the scanning start point of the vertical synchronization signal is shifted by 0.5H. Alternatively, it is possible to define the sub-frame data among the even sub-frame data and the odd sub-frame data that is transmitted first when starting to transmit the image data ID, and make the determination based on this. Alternatively, for example, if transmission is performed according to a standard such as MIPI, it can be defined that, for example, the even sub-frame data is transmitted in event mode and the odd sub-frame data is transmitted in pulse mode, and the determination can be made based on this. Alternatively, the determination information accompanying the image data can be transmitted as a sideband signal, and the determination can be made based on this. The determination can be made according to other methods. Based on the determination as described above, the determination unit 12 can generate selection signals RSA and RSB.

[0047] When writing the pixel data of the even sub-frame data, the determination unit 12 can drive the selection signal RSB to the active level and drive the selection signal RSA to the inactive level. When writing the pixel data of the odd sub-frame data, the determination unit 12 can drive the selection signal RSA to the active level and drive the selection signal RSB to the inactive level. Since the selection signal RSA is driven to the active level in the odd sub-frame and the selection signal RSB is driven to the active level in the even sub-frame, the selection signals RSA and RSB are alternately driven to the active level.

[0048] The vertical scan control unit 11 generates a row selection signal R for controlling the vertical scan (row selection) of the pixel array 10 x . The row selection signal R x can be formed by, for example, a shift register. The row selection signal R x can be driven to the active level in a predetermined time period in the order of R1, R2,..., R N-1 , R N , R N+1 , etc. In multi-line driving, when writing the pixel data of the even sub-frame data in the pixel 10 x , the vertical scan control unit 11 can generate a vertical scan signal such that the pixels 101 and 102 of the N-1th row and the Nth row are driven simultaneously. When writing the pixel data of the odd sub-frame data in the pixel 10 x , the vertical scan control unit 11 can generate a vertical scan signal such that the pixels 102 and the pixel 103 of the Nth row and the N+1th row are driven simultaneously.

[0049] When writing pixel data of an even sub-frame, the selection unit 111 of the N-1th row may output a signal having the same logic level as the row selection signal R of the Nth row to the vertical scan signal line VSL of the N-1th row according to the selection signal RSA. N-1 output a signal having the same logic level as the row selection signal R of the Nth row. N In addition, when writing pixel data of an even sub-frame, the selection unit 112 of the Nth row may output a signal having the same logic level as the row selection signal R of the Nth row to the vertical scan signal line VSL of the Nth row according to the selection signal RSB. N output a signal having the same logic level as the row selection signal R of the Nth row. N having the same logic level.

[0050] When writing pixel data of an odd sub-frame, the selection unit 112 of the Nth row may output a signal having the same logic level as the row selection signal R of the N+1th row to the vertical scan signal line VSL of the Nth row according to the selection signal RSB. N output a signal having the same logic level as the row selection signal R of the N+1th row. N+1 In addition, when writing pixel data of an odd sub-frame, the selection circuit 113 of the N+1th row may output a signal having the same logic level as the row selection signal R of the N+1th row to the vertical scan signal line VSL of the N+1th row according to the selection signal RSA. N+1 output a signal having the same logic level as the row selection signal R of the N+1th row. N+1 having the same logic level.

[0051] The driving unit DRV may be configured to drive pixels 10 of at least two rows based on pixel data of each row of each sub-frame data. x The driving unit DVR may drive a plurality of pixels 10 x such that pixels of rows inconsistent with the rows in the currently supplied sub-frame data emit light under a first condition, and pixels of rows consistent with the rows in the current sub-frame data emit light under a second condition. The second condition may be a condition where the amount of light emission is greater than the first condition when causing the pixels to emit light according to the same pixel value. In the first embodiment, under the first condition, the light emission period for causing the pixels to emit light is the first light emission period, and under the second condition, the light emission period for causing the pixels to emit light is the second light emission period that is longer than the first light emission period.

[0052] The light emission period control unit 23 may control the respective transistors Tr3 of the plurality of pixels 10 x such that the pixels 10 of rows inconsistent with the rows in the currently supplied sub-frame data x emit light according to the first light emission period. In addition, the light emission period control unit 23 may control the transistors Tr3 of the plurality of pixels 10 x such that the pixels of rows consistent with the rows in the currently supplied sub-frame data emit light according to the second light emission period.

[0053] The light emission period control unit 23 may include a period signal generation unit 25. The control signal generation unit 25 may generate a first period control signal EPA that defines a first light emission period T1 x and a second period control signal EPB that defines a second light emission period T2 longer than the first light emission period T1 x . The light emission period control unit 23 may include a plurality of selection units 23 x (231, 232, and 233). The plurality of selection units 23 x may be arranged such that one selection unit 23 x is assigned to one row. Each selection unit 23 x may select a period control signal corresponding to the current sub-frame data from the first period control signal EPB that defines the first light emission period T1 x and the second period control signal EPA that defines the second light emission period T2 longer than the first light emission period T1 x (including their multiple control signals), and output the selected period control signal. The transistors Tr3 of the pixels 10 in each row x may be controlled by the output of the corresponding selection unit among the plurality of selection units 23 x .

[0054] In the example, the first light emission period T1 is a light emission period shorter than the light emission period in the optimized comparative example, and the second light emission period T2 is a light emission period longer than the light emission period in the comparative example. The average value of the first light emission period T1 and the second light emission period T2 may be consistent with the light emission period in the comparative example. For example, assume the following situation: In order to suppress power consumption, the light emission period in the comparative example is designed to be 70% of the longest period. In this case, for example, the first light emission period T1 may be 40% of the longest period, and the second light emission period T2 may be 100% of the shortest period. Alternatively, assume the following situation: The light emission period in the comparative example is designed to be 90% of the longest period. In this case, for example, the first light emission period T1 may be 80% of the longest period, and the second light emission period T2 may be 100% of the shortest period.

[0055] The first period control signal EPA x and the second period control signal EPB x may be generated to cause the light emitting element EL of the pixel 10 x to emit light continuously, or may be generated to cause the light emitting element EL of the pixel 10 x to emit light intermittently.

[0056] Figure 5 Exemplarily shows the driving of the pixels 10 in the even sub-frames and odd sub-frames of the display device DD2 according to the first embodiment x . Figure 2Exemplarily, the driving of the pixels 10 in the even sub - frame and the odd sub - frame in the display device DD1 according to the comparative example is shown. x Tr1 / G, Tr2 / G, and Tr3 / G respectively indicate the signals supplied to the gates of the transistors Tr1, Tr2, and Tr3.

[0057] In the even sub - frame, the light - emitting period of the light - emitting element EL of each of the pixels 101 and 103 in the N - 1th row and the N + 1th row can be controlled according to the first period control signal EPA that defines the first light - emitting period T1 as a relatively short light - emitting period. x In addition, in the even sub - frame, the light - emitting period of the light - emitting element EL of the pixel 102 in the Nth row can be controlled according to the second period control signal EPB that defines the second light - emitting period T2 as a relatively long light - emitting period. x On the other hand, in the odd sub - frame, the light - emitting period of the light - emitting element EL of the pixel 102 in the Nth row can be controlled according to the first period control signal EPA that defines the first light - emitting period T1 as a relatively short light - emitting period. x In addition, in the odd sub - frame, the light - emitting period of the light - emitting element EL of each of the pixels 101 and 103 in the N - 1th row and the N + 1th row can be controlled according to the second period control signal EPB that defines the second light - emitting period T2 as a relatively long light - emitting period. x The horizontal scan control unit 14 can generate pixel signals (voltage signals) for the pixels 10 in each column to be written to the selected rows based on the image data ID, and output the pixel signals to the data lines DL of each column.

[0058] The scanning of the pixel array 10 by the vertical scan control unit 11 and the output of the pixel signals to the data lines DL by the horizontal scan control unit 14 can be controlled synchronously with each other. x In the multi - line driving, in each column, a single pixel signal can be written into two pixels 10 adjacent to each other in the vertical direction. x The pixel 10 can control the light emission of the light - emitting element EL based on the vertical scan signal from the vertical scan control unit 11, the period control signal from the light - emitting period control unit 23, and the pixel signal from the horizontal scan control unit 14. x The light - emitting brightness of the light - emitting element EL can be defined by the pixel signal (voltage signal) written in the capacitor C. x The light - emitting period of the light - emitting element EL can be controlled by the period control signals EPA

[0059] Each pixel 10 x and EPB. x x

[0060] ​​In an even sub-frame, the pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA. x The pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N-1 In an even sub-frame, the pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N In an even sub-frame, the pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA. Figure 6 In an even sub-frame, the pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N-1 In an even sub-frame, the pixel signal of the pixel 102 in the N-th row can be written into the capacitors C of the pixels 101 and 102 in the (N - 1)-th row and the N-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 101 in the (N - 1)-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. As exemplified in, the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 101 in the (N - 1)-th row that emits light in the first light emission period T1 defined by the first control signal EPA.

[0061] In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. x In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N+1 In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N+1 In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. Figure 6 In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA. N In an odd sub-frame, the pixel signal of the pixel 103 in the (N + 1)-th row can be written into the capacitors C of the pixels 102 and 103 in the N-th row and the (N + 1)-th row via the data line DL. Then, the light emission period of the light emitting element EL of the pixel 102 in the N-th row can be controlled in the first light emission period T1 defined by the first control signal EPA. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the second control signal EPB. The light emission period of the light emitting element EL of the pixel 103 in the (N + 1)-th row can be controlled in the second light emission period T2 defined by the first control signal EPA. As exemplified in, the light emission amount of the light emitting element EL of the pixel 103 in the (N + 1)-th row is greater than the light emission amount of the light emitting element EL of the pixel 102 in the N-th row that emits light in the first light emission period T1 defined by the first control signal EPA.

[0062] In Figures 7A to 7E , the multi-line driving in the comparative example and the multi-line driving in the first embodiment are compared. In this example, the first light emission period T1 is set to 0.75 times the light emission period in the comparative example, and the second light emission period T2 is set to 1.25 times the light emission period in the comparative example. The left column shows the comparative example, while the right column shows the embodiment.

[0063] Figure 7A The image data ID (original image) is shown, and there is no difference between the comparative example and the embodiment. Figure 7B The display result of the even sub-frame is shown, while Figure 7C the display result of the odd sub-frame is shown. Figure 7D showsFigure 7B and Figure 7C the integral average image of Figure 7C , i.e., the result of visibility. Figure 7E shows Figure 7A the absolute value of the difference between Figure 7D and Figure 7E The average value of the absolute value of the difference shown in Figure 7D was 21.3 in the comparative example and 15.9 in the first embodiment. Compared with the comparative example, the visual image quality was improved in the first embodiment.

[0064] If the first light emission period T1 is set to 0.5 times the light emission period in the comparative example and the second light emission period T2 is set to 1.5 times the light emission period in the comparative example, the average value of the absolute value of the difference in the first embodiment is 10.6, and a higher effect is exhibited. However, if the difference in the ratio of each of the first light emission period T1 and the second light emission period T2 in the first embodiment with respect to the light emission period in the comparative example increases, the amount of fluctuation in the light emission luminance in one frame period increases, and this is perceived as flicker. To prevent this, it is preferably controlled with an upper limit of about 1.5 times, but the present invention is not limited thereto.

[0065] In the first embodiment, the quality of the display image can be improved only by using the supplied current sub-frame data. Therefore, compared with the method using a frame memory or the like, the quality of the display image can be improved by a simple arrangement.

[0066] In the description so far, for simplicity, examples of controlling the light emission period of the pixel having the above structure have been described. In addition to this, methods such as a method of generating a signal for controlling the light emission period based on a triangular wave can be considered. In this case, a control method of changing the threshold value of pulse conversion for each row when generating a signal for controlling the light emission period, or a method of changing the inclination of the triangular wave for each row can be used to control the light emission period.

[0067] The light emitting element EL may be an organic EL element or may be other elements. The light emitting element EL can be replaced with a liquid crystal element. In this case, a method can be considered: adjusting the brightness by, for example, controlling the illumination period of the backlight for each row based on the period control signal in the first embodiment. By performing writing for discharging the charge held in the pixel capacitor when driving the liquid crystal according to the light emission period and changing the light emission period for each row according to the period control signal, a similar effect can be obtained.

[0068] The following configuration has been described above: using pixel data of one line to mainly drive pixels of two lines, and the determination unit determines even sub-frame data or odd sub-frame data. However, by extending this embodiment, the present invention can be applied to configurations that simultaneously drive more lines of pixels and configurations that use input data having two or more attributes.

[0069] Referring to Figure 8 , the display device DD3 according to the second embodiment will be described below. Note that matters not mentioned as the arrangement and operation of the display device DD3 according to the second embodiment may follow the arrangement and operation of the display device DD2 according to the first embodiment. The display device DD3 may have a function of displaying an image in which each frame is formed of at least two sub-frames. The display device DD3 may include a pixel array 80, a driving unit DRV' configured to drive the pixel array 80, and a determination unit 12. The driving unit DRV' may include a vertical scan control unit 11 and a horizontal scan control unit 84. The display device DD3 may drive the pixel array 80 by a multi-line driving method for simultaneously driving at least two lines of pixels. For simplicity, an example of simultaneously driving two lines of pixels will be described here.

[0070] The pixel array 80 includes a plurality of pixels arranged to form multiple rows and multiple columns. In Figure 8 , pixels 801, 802, and 803 respectively arranged in the (N - 1)-th row, the N-th row, and the (N + 1)-th row are representatively shown. When describing a plurality of pixels without distinguishing them from each other, these pixels will be described as pixel 80 x . This also applies to other components. Each pixel 80 x may include transistors Tr1 and Tr2, a capacitor C, and a light-emitting element EL (e.g., an organic EL element). The pixel 80 x in the display device DD3 according to the second embodiment may have a structure obtained by removing the transistor Tr3 from the pixel 10 x in the display device DD2 according to the first embodiment, but the pixel 80 x may also include the transistor Tr3. In this case, the display device DD3 may include the light-emitting period control unit 13 in the display device DD1 according to the comparative example.

[0071] The gate of the transistor Tr1 (Tr1 / G) is connected to the vertical scan line VSL driven by the vertical scan control unit 11 x (..., VSL N-1 , VSL N , VSL N+1 ). When data DLA x and DLB xWhen writing pixel signals into capacitor C by (DLA1, DLB1, DLA2, DLB2,...), vertical scan line VSL x is activated. Transistor Tr2 can supply a current corresponding to the pixel signal written into capacitor C to light-emitting element EL.

[0072] Drive unit DRV' can be configured to drive at least two rows of pixels 80 based on the pixel data of each row of each sub-frame data x . Drive unit DVR can drive a plurality of pixels 80 x , so that the pixels of the rows inconsistent with the rows in the currently supplied sub-frame data emit light under a first condition, and the pixels of the rows consistent with the rows in the current sub-frame data emit light under a second condition. The second condition can be a condition with a greater light emission intensity (brightness) than the first condition.

[0073] The horizontal scan control unit 84 forming a part of drive unit DRV' can include first data line DLA x , first data line DLA x is configured to supply pixel signals to the pixels of the rows inconsistent with the rows in the first sub-frame data of at least two sub-frame data. Horizontal scan control unit 84 can also include second data line DLB x , second data line DLB x is configured to supply pixel signals to the pixels of the rows consistent with the rows in the second sub-frame data of at least two sub-frame data. More specifically, horizontal scan control unit 84 can include first data line DLA x , first data line DLA x is configured to supply pixel signals to pixels 801 and 803 of the (N - 1)th row inconsistent with the Nth row in the odd sub-frame data among the even sub-frame data and the odd sub-frame data. Horizontal scan control unit 84 can also include second data line DLB x , second data line DLB x is configured to supply pixel signals to pixels 802 of the Nth row consistent with the Nth row in the even sub-frame data among the even sub-frame data and the odd sub-frame data. In each column, pixels 80 x connected to first data line DLA x and pixels 80 x connected to second data line DLB x can be alternately arranged.

[0074] When writing pixel data of an even sub-frame, the transistors Tr1 of the pixels 801 and 802 in the N-1th row and the Nth row can be driven so that the pixels 801 and 802 in the N-1th row and the Nth row are driven simultaneously. When writing pixel data of an odd sub-frame, the transistors Tr1 of the pixels 802 and 803 in the Nth row and the N+1th row can be driven so that the pixels 802 and 803 in the Nth row and the N+1th row are driven simultaneously. To achieve this, the vertical scan control unit 11 includes a plurality of selection units 11 x (111, 112, and 113).

[0075] When writing pixel data of an even sub-frame, the horizontal scan control unit 84 generates pixel signals to be respectively supplied to the first data line DLA x and the second data line DLB x based on the pixel data of the Nth row of the image data ID. At this time, the horizontal scan control unit 84 generates pixel signals to be respectively supplied to the first data line DLA x and the second data line DLB x to satisfy the first condition and the second condition. More specifically, when writing pixel data of an even sub-frame, the horizontal scan control unit 84 can make the value of the pixel signal to be supplied to the second data line DLB x greater than the value of the pixel signal to be supplied to the first data line DLA x . More specifically, if the pixel data of the Nth row is d, the horizontal scan control unit 84 can supply a pixel signal corresponding to d-α (α is a positive value) to the first data line DLA x and supply a pixel signal corresponding to d+β (β is a positive value) to the second data line DLB x . Here, the value of β can be equal to or different from the value of α. The pixel signal supplied to the first data line DLA x is written into the capacitor C of the pixel 801 in the N-1th row via the transistor Tr1 of the pixel 801 in the N-1th row. The pixel signal supplied to the second data line DLB x is written into the capacitor C of the pixel 802 in the Nth row via the transistor Tr1 of the pixel 802 in the Nth row. In this way, in the even sub-frame, the light emission intensity of the pixel 802 in the N-1th row driven according to the pixel data of the Nth row becomes higher than the light emission intensity of the pixel 801 in the N-1th row driven according to the pixel data of the Nth row.

[0076] When writing pixel data of an odd sub-frame, the horizontal scan control unit 84 generates pixel signals to be respectively supplied to the first data line DLA x and the second data line DLB xpixel signals. At this time, the horizontal scan control unit 84 generates pixel signals to be supplied to the first data line DLA x and the second data line DLB x respectively, to satisfy the first condition and the second condition. More specifically, when writing pixel data of an odd sub-frame, the horizontal scan control unit 84 can make the value of the pixel signal to be supplied to the first data line DLA x greater than the value of the pixel signal to be supplied to the second data line DLB x . More specifically, if the pixel data of the (N + 1)-th row is d, the horizontal scan control unit 84 can supply a pixel signal corresponding to d + β (β is a positive value) to the first data line DLA x and supply a pixel signal corresponding to d - α (α is a positive value) to the second data line DLB x . Here, the value of β can be equal to or different from the value of α. The pixel signal supplied to the first data line DLA x is written into the capacitor C of the pixel 803 in the (N + 1)-th row via the transistor Tr1 of the pixel 803 in the (N + 1)-th row. The pixel signal supplied to the second data line DLB x is written into the capacitor C of the pixel 802 in the N-th row via the transistor Tr1 of the pixel 802 in the N-th row. In this way, in the odd sub-frame, the light emission intensity of the pixel 803 in the (N + 1)-th row driven according to the pixel data of the (N + 1)-th row is higher than that of the pixel 802 in the N-th row driven according to the pixel data of the (N + 1)-th row.

[0077] The process of determining the pixel signals to be supplied to the first data line DLA x and the second data line DLB x respectively based on the pixel data of each row (and each column) of the image data ID can also be understood as a correction process for obtaining pixel signals by correcting data. This correction process can be a process of linearly or non-linearly correcting the pixel data of each row of the image data ID.

[0078] Here, when the pixel in the N-th row of the image data ID (original image) is a pixel in a low-brightness area, if pixel signals are generated by correcting to increase the pixel values of the pixels in the even area, an unnatural display image may be generated. Therefore, for the pixels in the low-brightness area, it is preferable to generate pixel signals to suppress the brightness to be equal to or lower than the brightness of the original image. For example, for data with a pixel value (brightness value) equal to or less than Figure 9 the threshold Th shown, the value without the above correction can be output to the data line. The above correction can be performed to prevent the generation of a brightness step, that is, to make the brightness change gradually.

[0079] According to the first and second embodiments, pixels of rows inconsistent with the rows in the currently supplied sub-frame data emit light under a first condition, and pixels of rows consistent with the rows in the current sub-frame data emit light under a second condition with a light emission amount greater than the first condition. In this way, the quality of the displayed image in multi-line driving can be improved. Further, in the second embodiment, any correction process can be adopted, such that a further improvement in the quality of the displayed image can be expected.

[0080] It can also be said that the display device according to each of the first and second embodiments is a display device that uses image data formed by at least two sub-frames in one frame and uses data driving based on a single data for multiple rows including a first row, wherein one frame includes a first sub-frame (for which the first row and another row among the multiple rows are driven by data based on the driving data of the first row) and a second sub-frame (for which the first row and another row among the multiple rows are driven by data based on the driving data of the other row), and at least one pixel included in the first row has a greater light emission amount in the first sub-frame than in the second sub-frame.

[0081] Figure 10 FIG. is a schematic diagram showing application examples of the above-described first display device DD2 and second display device DD3. The display device 1000 may include a touch panel 1003, a display panel 1005 formed of a display device represented by the display device DD2 or DD3, a frame 1006, a circuit board 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. Flexible printed circuits FPC1002 and 1004 are respectively connected to the touch panel 1003 and the display panel 1005. Transistors are printed on the circuit board 1007. If the display device 1000 is not a portable device, the battery 1008 is unnecessary. Even when the display device 1000 is a portable device, the battery 1008 may be disposed at other positions.

[0082] The display device according to the present embodiment can be used for a display unit of an imaging device that includes an optical unit including a plurality of lenses and an image sensor that receives light passing through the optical unit. The imaging device may include a display unit that displays information acquired by a plurality of image sensors included in the imaging unit. Alternatively, information may be acquired using the information acquired by the image sensor, and the display unit may display information different from the information acquired by the image sensor. The imaging device may be a digital camera or a digital video camera.

[0083] Figure 11AIt is a schematic diagram showing an example of a camera device according to an embodiment. The camera device 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The viewfinder 1101 may include a display unit formed by a display device represented by the display device DD2 or DD3. In this case, the display device can display not only the image to be captured, but also environmental information, shooting instructions, etc. The environmental information may include the intensity of ambient light, the direction of ambient light, the moving speed of the subject, the probability that the subject is blocked by an obstacle, etc.

[0084] Since the time suitable for capturing an image is very short, it is preferable to display information as quickly as possible. Therefore, it is preferable to use the display device according to the above embodiment. The light-emitting element may be formed of an organic light-emitting element having a high response speed.

[0085] The camera device 1100 includes an optical unit (not shown). The optical unit includes a plurality of lenses and forms an image on an image sensor housed in the housing 1104. The focus can be adjusted by adjusting the relative positions of the plurality of lenses. This operation can be performed automatically. The display device according to the embodiment may include color filters of red, green, and blue. In the color filters, red, green, and blue may be arranged in a triangular arrangement. The display device according to the embodiment can be used for the display unit of a mobile terminal. In this case, both a display function and an operation function can be provided. Examples of mobile terminals include mobile phones such as smart phones, tablet computers, and head-mounted displays.

[0086] Figure 11B It is a schematic diagram showing an example of an electronic device according to an embodiment. The electronic device 1200 includes a display unit 1201 formed by a display device represented by the display device DD2 or DD3, an operation unit 1202, and a housing 1203. The housing 1203 may include a circuit, a printed board including the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type sensing unit. The operation unit may be a biometric unit that recognizes fingerprints and unlocks, etc. An electronic device including a communication unit may also be referred to as a communication device.

[0087] Figure 12A and Figure 12B are schematic diagrams each showing an example of a display device according to an embodiment. Figure 12A Shows a display device such as a TV monitor or a PC monitor. The display device 1300 includes a frame 1301 and a display unit 1302. The display unit 1302 may be formed by a display device represented by the display device DD2 or DD3. The display device 1300 includes a base 1303 that supports the frame 1301 and the display unit 1302. The base 1303 is not limited to Figure 12AThe form shown in . The lower side of the frame 1301 can be used as a base. The frame 1301 and the display unit 1302 can be bent. The radius of curvature can be between 5000 mm (inclusive) and 6000 mm (inclusive).

[0088] Figure 12B is a schematic diagram showing another example of a display device according to an embodiment. Figure 12B The display device 1310 shown in is configured to be bendable and is a so-called foldable display device. The display device 1310 includes a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The display device represented by the display device DD2 or DD3 can be applied to each of the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 can be a seamless display device. The first display unit 1311 and the second display unit 1312 can be divided at the bending point. The first display unit 1311 and the second display unit 1312 can display different images, or an image can be displayed using the first and second display units.

[0089] Figure 13A is a schematic diagram showing an example of a lighting device according to an embodiment. The lighting device 1400 can include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusion unit 1405. The light emitting device 100 can be applied to the light source 1402. The filter can be a filter that improves the color rendering property of the light source. The light diffusion unit can effectively diffuse the light from the light source to illuminate a wide range, thereby performing illumination and the like. The filter and the light diffusion unit can be provided on the illumination light emission side. According to need, a lid can be provided at the outermost part.

[0090] The lighting device is, for example, a device for illuminating a room. The lighting device can emit white, day white, or any other color of light from blue to red. A light control circuit for controlling the light color can be provided. The lighting device can include an organic light emitting element according to the present invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts an AC voltage into a DC voltage. Note that the color temperature of white light is 4200K, while the color temperature of day white light is 5000K. The lighting device can include a color filter. In addition, the lighting device according to the present embodiment can include a heat dissipation part. The heat dissipation part releases the heat in the device to the outside of the device, and examples thereof include metals having a high specific heat, liquid silicon, and the like.

[0091] Figure 13BIt is a schematic diagram showing an automobile, which is an example of a moving body according to an embodiment. The automobile includes a taillight as an example of an illuminating unit. The automobile 1500 includes a taillight 1501 and can turn on the taillight when performing a braking operation or the like. A display panel formed by a display device represented by the display devices DD2 or DD3 can be applied to the taillight 1501. The taillight may include a protective member that protects the light-emitting element. The protective member has a certain strength and can be made of any material (as long as the material is transparent), but is preferably made of polycarbonate or the like. Furan dicarboxylic acid derivatives, acrylonitrile derivatives, etc. can be mixed with polycarbonate.

[0092] The automobile 1500 may include a main body 1503 and a window 1502 attached to the main body 1503. The window can be a transparent display (as long as it is not a window for checking the front or rear of the automobile). The light-emitting device 100 can be applied to the transparent display. In this case, components such as electrodes included in the organic light-emitting element are formed of a transparent member. The moving body according to the present embodiment can be a ship, an airplane, a drone, etc. The moving body may include a main body and an illuminating unit provided in the main body. The illuminating unit can emit light to notify the position of the main body. A display panel formed by a display device represented by the display devices DD2 or DD3 can be applied to the illuminating unit.

[0093] Reference will be made to Figure 14A and Figure 14B to describe application examples of the display device according to the above embodiment. The display device is applicable to, for example, a system that can be worn as a wearable device (such as smart glasses, HMDs, smart contact lenses, etc.).

[0094] Figure 14A Glasses 1600 (smart glasses) according to the application example are shown. An imaging device 1602 such as a CMOS sensor or a SPAD is arranged on the front surface side of the lens 1601 of the glasses 1600. Moreover, a display device to which the light-emitting device 100 is applied is arranged on the rear surface side of the lens 1601.

[0095] The glasses 160 also include a control device 1603. The control device 1603 serves as a power source for supplying power to the imaging device 1602 and the display device according to the embodiment. The control device 1603 controls the operation of the imaging device 1602 and the operation of the display device. An optical system for focusing light onto the imaging device 1602 is formed on the lens 1601.

[0096] Figure 14BFig. 1610 (smart glasses) according to another application example is shown. The glasses 1610 include a control device 1612, and a display device and a camera device corresponding to the camera device 1602 are incorporated in the control device 1612. An optical system for projecting light emitted from the camera device and the display device in the control device 1612 is formed in the control device 1612, and an image is projected onto the lens 1611. In addition to serving as a power source for supplying power to the camera device and the display device, the control device 1612 also controls the operations of the camera device and the display device. The control device may further include a gaze detection unit for detecting the gaze of the wearer. Infrared light can be used for gaze detection. The infrared light emitting unit emits infrared light toward the eyeball of the user who is looking at the display image. When the emitted infrared light is reflected by the eyeball and detected by the camera unit including a light receiving element, a captured image of the eyeball can be obtained. By providing a reduction portion in the plan view that reduces the light from the infrared light emitting unit to the display unit, image quality degradation is reduced.

[0097] The gaze of the user at the display image is detected from the captured image of the eyeball obtained by the imaging operation using infrared light. For gaze detection using the captured eyeball image, known methods can be arbitrarily applied. As an example, a gaze detection method based on the Purkinje image caused by the reflection of the emitted light on the cornea can be used.

[0098] More specifically, a gaze detection process is performed based on the pupil-corneal reflection method. By using the pupil-corneal reflection method, a gaze vector representing the direction (rotation angle) of the eyeball is calculated based on the image of the pupil and the Purkinje image included in the captured image of the eyeball, and the gaze of the user is detected.

[0099] The display device according to an embodiment of the present invention may include a camera device including a light receiving element, and control the display image on the display device based on the gaze information of the user obtained from the camera device.

[0100] More specifically, in the display device, a first field of view area gazed at by the user and a second field of view area other than the first field of view area are determined based on the gaze information. The first field of view area and the second field of view area may be determined by the control device of the display device. Alternatively, the first field of view area and the second field of view area may be determined by an external control device, and the display device may receive information corresponding to the determination. Control may be performed in the display area of the display device such that the display resolution of the first field of view area is higher than the display resolution of the second field of view area. That is, the resolution of the second field of view area may be lower than the resolution of the first field of view area.

[0101] In addition, the display area includes a first display area and a second display area different from the first display area, and an area with a high priority is determined from the first display area and the second display area of the display area based on the line-of-sight information. The first field-of-view area and the second field-of-view area can be determined by a control device of the display device. Alternatively, the first field-of-view area and the second field-of-view area can be determined by an external control device, and the display device can receive information corresponding to the determination. Control can be performed such that the resolution of the area with a high priority is set to be higher than the resolution of the area other than the area with a high priority. That is, the resolution of the area with a relatively low priority can be set low.

[0102] Note that AI can be used to determine the first field-of-view area and the area with a high priority. The AI can be a model configured to estimate the angle of the line of sight and the distance to an object as a fixation target from an image of the eyeball by using the image of the eyeball and the direction in which the eyeball of the image actually fixates as teaching data. The display device, the imaging device, or an external device can include an AI program. If the AI program is included in an external device, the information determined by the AI program will be transmitted to the display device via communication.

[0103] In the case where display control is to be performed based on visual recognition detection, the display device according to an embodiment can be preferably applied to smart glasses further including an imaging device configured to image the outside. The smart glasses can display the imaged outside information in real time.

[0104] As described above, by using the device using an organic light-emitting element according to the present embodiment, stable display can be performed with good image quality even in the case of long-time display.

[0105] The preferred embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and various changes and modifications can be made within the spirit and scope of the present invention.

[0106] This application claims the priority of Japanese Patent Application No. 2020-172134 filed on October 12, 2020, the entire content of which is incorporated herein by reference.

[0107] List of Reference Numerals

[0108] DD2, DD3: Display device

[0109] DRV, DRV': Driving unit

[0110] 10 x 、80 x : Pixel

Claims

1. A display device configured to display an image in which each frame is formed of at least two sub - frames, the display device comprising: A driving unit configured to drive a plurality of pixels in a pixel array to drive at least two rows of pixels based on pixel data of each row of the supplied respective sub - frame data, wherein the driving unit drives the plurality of pixels such that pixels in rows inconsistent with the rows in the currently supplied sub - frame data emit light under a first condition, and pixels in rows consistent with the rows in the currently supplied sub - frame data emit light under a second condition, the second condition being a condition in which the amount of light emission is greater than that under the first condition when pixels emit light according to the same pixel value.

2. The display device according to claim 1, wherein, under the first condition, the light - emitting period for causing the pixels to emit light is a first light - emitting period, and under the second condition, the light - emitting period for causing the pixels to emit light is a second light - emitting period longer than the first light - emitting period.

3. The display device according to claim 2, wherein, each of the plurality of pixels includes a transistor configured to control the light - emitting period, and the driving unit controls the transistors of the plurality of pixels such that pixels in rows inconsistent with the rows in the currently supplied sub - frame data emit light according to the first light - emitting period, and pixels in rows consistent with the rows in the currently supplied sub - frame emit light according to the second light - emitting period.

4. The display device according to claim 3, wherein, the driving unit includes a plurality of selection units arranged such that one selection unit is assigned to one row, and each selection unit selects a control signal corresponding to the currently supplied sub - frame data from a plurality of control signals including a first control signal and a second control signal, and outputs the selected control signal, wherein the first control signal is used to define the first light - emitting period, the second control signal is used to define a second light - emitting period longer than the first light - emitting period, and the transistors of the pixels in each row are controlled by the output of the corresponding selection unit among the plurality of selection units.

5. The display device according to claim 1, wherein, the second condition is a condition of higher light - emitting intensity than the first condition.

6. The display device according to claim 5, wherein, each of the plurality of pixels includes a memory and is configured to emit light according to a signal written in the memory, and the driving unit controls pixel signals to be written into the memories of the plurality of pixels based on the currently supplied sub - frame data to satisfy the first condition and the second condition.

7. The display device according to claim 6, wherein, the driving unit includes a first data line and a second data line, the first data line being configured to supply pixel signals to pixels in rows consistent with the rows in the first sub - frame data among the supplied sub - frame data, the second data line being configured to supply pixel signals to pixels in rows consistent with the rows in the second sub - frame data among the supplied sub - frame data, and The driving unit controls pixel signals to be supplied to the first data line and the second data line based on the supplied current sub-frame data so as to satisfy the first condition and the second condition.

8. The display device according to claim 1, wherein, the at least two sub-frames include an even sub-frame and an odd sub-frame.

9. The display device according to claim 1, further comprising: a determination unit configured to determine that the supplied current sub-frame data is one of the at least two sub-frames.

10. An electronic device, comprising: an imaging unit configured to image a subject; and the display device according to any one of claims 1 to 9, configured to display an image based on data from the imaging unit.

11. A moving body, comprising: an imaging unit configured to image a subject; and the display device according to any one of claims 1 to 9, configured to display an image based on data from the imaging unit.

12. A display device that uses image data formed of at least two sub-frames for one frame and drives multiple rows including a first row using data based on the same data, Among them, the one frame includes a first sub-frame and a second sub-frame, for the first sub-frame, the first row and another row among the multiple rows are driven using data based on the driving data of the first row, for the second sub-frame, the first row and another row among the multiple rows are driven using data based on the driving data of the other row, and the light emission amount of at least one pixel included in the first row in the first sub-frame is greater than the light emission amount of the at least one pixel in the second sub-frame.

13. The display device according to claim 12, wherein, the at least two sub-frames include an even sub-frame and an odd sub-frame.

14. The display device according to claim 12 or 13, further comprising: a determination unit configured to determine the first sub-frame or the second sub-frame based on the driving data.

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