Display device

Abstract

The display device (10) includes a display panel (1) that includes first sub-pixels of first light-emitting elements; and second sub-pixels that are adjacent to the first sub-pixels and include second light-emitting elements. The display device (10) includes a circuit unit (11) that calculates a degradation amount of the first light-emitting elements based on a light-emitting state of the second light-emitting elements, and calculates a compensation value for the first light-emitting elements based on the calculated degradation amount of the first light-emitting elements.

Description

Technical Field

[0001] The present disclosure relates to a display device and a driving method thereof. Background Art

[0002] In recent years, various display devices equipped with light-emitting elements have been developed. In particular, display devices equipped with OLED (Organic Light Emitting Diode) or QLED (Quantum dot Light Emitting Diode) have attracted attention in terms of achieving low power consumption, thinness, and high image quality.

[0003] However, it is known that the brightness of these light-emitting elements changes over time. Specifically, as the usage time elapses, a decrease in brightness due to deterioration of the light-emitting elements occurs.

[0004] In Patent Document 1, a technique for compensating for the change in brightness of a light-emitting element over time is described.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-177714 Summary of the Invention

[0008] Technical Problem to be Solved by the Invention

[0009] However, the technique for compensating for the change in brightness of a light-emitting element over time described in Patent Document 1 is a technique for obtaining the deterioration amount of the light-emitting element and the compensation value of the light-emitting element based on data on the change in brightness of the light-emitting element alone that is the object of compensation.

[0010] Figure 15 It is a diagram for explaining the problems of the prior art described in Patent Document 1.

[0011] Figure 15Four pixels P1, P2, P3, and P4 are shown, which are composed of a red sub-pixel RSP including a red light-emitting element (not shown), a green sub-pixel GSP including a green light-emitting element (not shown), and a blue sub-pixel BSP including a blue light-emitting element (not shown). Red 255 gray scale (R255 gray scale) is displayed in pixel P1. In this case, the red light-emitting element included in the red sub-pixel RSP emits light with a brightness corresponding to 255 gray scale, and the green light-emitting element included in the green sub-pixel GSP and the blue light-emitting element included in the blue sub-pixel BSP do not emit light respectively. Yellow 255 gray scale (Y255 gray scale) is displayed in pixel P2. In this case, the red light-emitting element included in the red sub-pixel RSP emits light with a brightness corresponding to 255 gray scale, and the green light-emitting element included in the green sub-pixel GSP also emits light with a brightness corresponding to 255 gray scale, and the blue light-emitting element included in the blue sub-pixel BSP does not emit light. Magenta 255 gray scale (M255 gray scale) is displayed in pixel P2. In this case, the red light-emitting element included in the red sub-pixel RSP emits light with a brightness corresponding to 255 gray scale, and the blue light-emitting element included in the blue sub-pixel BSP also emits light with a brightness corresponding to 255 gray scale, and the green light-emitting element included in the green sub-pixel GSP does not emit light. White 255 gray scale (W255 gray scale) is displayed in pixel P4. In this case, the red light-emitting element included in the red sub-pixel RSP emits light with a brightness corresponding to 255 gray scale, the green light-emitting element included in the green sub-pixel GSP also emits light with a brightness corresponding to 255 gray scale, and the blue light-emitting element included in the blue sub-pixel BSP also emits light with a brightness corresponding to 255 gray scale.

[0012] The inventors of the present invention have noticed the following situation: When pixels P1, P2, P3, and P4 respectively maintain the above-displayed states for a certain long time and continue to display (also referred to as "image retention"), during the certain long time period, the degradation amounts of the red light-emitting elements included in the red sub-pixels RSP included in pixels P1, the red light-emitting elements included in the red sub-pixels RSP included in pixels P2, the red light-emitting elements included in the red sub-pixels RSP included in pixels P3, and the red light-emitting elements included in the red sub-pixels RSP included in pixels P4, which emit light with a brightness equivalent to 255 gray scale, are different from each other, rather than being the same degree.

[0013] As described above, the amount of degradation of the light-emitting element included in a specific sub-pixel depends on the light-emitting state of the light-emitting element included in the sub-pixel adjacent to the specific sub-pixel. Therefore, the technique for compensating for the change over time in the luminance of the light-emitting element described in Patent Document 1 is a technique that does not consider the light-emitting state of the light-emitting element included in the adjacent sub-pixel, and calculates the amount of degradation of the light-emitting element and the compensation value of the light-emitting element based on the data of the change over time in the luminance of the light-emitting element alone that is the object of compensation. Therefore, there is a problem that the influence of the light-emitting state of the light-emitting element included in the adjacent sub-pixel on the amount of degradation of the light-emitting element that is the object of compensation is not considered at all.

[0014] One aspect of the present disclosure has been completed in view of the above problems, and an object thereof is to provide a display device and a driving method for the display device that can compensate for the amount of degradation of a light-emitting element considering the influence brought about by the light-emitting state of the light-emitting element included in an adjacent sub-pixel.

[0015] Means for Solving the Problems

[0016] In order to solve the above problems, the display device of the present disclosure

[0017] is a display device including a first sub-pixel including a first light-emitting element and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element.

[0018] The display device includes a circuit unit that calculates the amount of degradation of the first light-emitting element based on the light-emitting state of the second light-emitting element, and calculates the compensation value including the first light-emitting element based on the calculated amount of degradation of the first light-emitting element.

[0019] In order to solve the above problems, the driving method of the display device of the present invention

[0020] is a driving method for a display device including a first sub-pixel including a first light-emitting element and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element.

[0021] calculates the amount of degradation of the first light-emitting element based on the light-emitting state of the second light-emitting element, and calculates the compensation value including the first light-emitting element based on the calculated amount of degradation of the first light-emitting element.

[0022] Advantages of the Invention

[0023] One aspect of the present disclosure can provide a display device and a driving method for the display device that can compensate for the amount of degradation of a light-emitting element considering the influence brought about by the light-emitting state of the light-emitting element included in an adjacent sub-pixel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a diagram showing a schematic configuration of a display device according to Embodiment 1.

[0025] Figure 2 (a) thereof is a diagram showing a display pattern displayed on a display panel of a display device as a comparative example, Figure 2 (b) thereof is a diagram showing the degree of deterioration of a light-emitting element caused by the display pattern shown in (a).

[0026] Figure 3 It is a diagram showing a schematic configuration of a pixel of a display panel included in the display device according to Embodiment 1.

[0027] Figure 4 (a) thereof is a diagram showing a case where a display pattern of white 255 grayscale is displayed on each pixel of the display panel included in the display device according to Embodiment 1, Figure 4 (b) thereof is a diagram showing a case where a display pattern of green 255 grayscale is displayed on each pixel of the display panel included in the display device according to Embodiment 1.

[0028] Figure 5 It is a diagram for explaining compensation for deterioration of a light-emitting element performed in the display device according to Embodiment 1.

[0029] Figure 6 It is a diagram showing a schematic configuration of a display device according to Embodiment 2.

[0030] Figure 7 (a) thereof is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a green sub-pixel of a display panel included in the display device according to Embodiment 3, (b) is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a red sub-pixel of a display panel included in the display device according to Embodiment 3, and (c) is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a blue sub-pixel of a display panel included in the display device according to Embodiment 3.

[0031] Figure 8 (a) thereof is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a green sub-pixel of a display panel included in the display device according to Embodiment 3, (b) is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a red sub-pixel of a display panel included in the display device according to Embodiment 3, and (c) is a diagram for explaining a method of calculating the amount of deterioration of a light-emitting element included in a blue sub-pixel of a display panel included in the display device according to Embodiment 3.

[0032] Figure 9 It is a diagram of a schematic configuration of a display device according to Embodiment 3.

[0033] Figure 10Figs. (a), (b), and (c) are diagrams for explaining a method of calculating the amount of degradation of the light-emitting elements included in the green sub-pixels of the display panel included in the display device according to Embodiment 4.

[0034] Figure 11 is a diagram showing a schematic configuration of the display device according to Embodiment 4.

[0035] Figure 12 Figs. (a), (b), and (c) are diagrams for explaining a method of calculating the amount of degradation of the light-emitting elements included in the green sub-pixels of the display panel included in the display device according to Embodiment 5.

[0036] Figure 13 is a diagram showing a schematic configuration of the display device according to Embodiment 5.

[0037] Figure 14 is a diagram showing an example of another display panel that can be included in the display device according to Embodiment ⑤.

[0038] Figure 15 is a diagram for explaining the problems of the prior art described in Patent Document 1. Detailed Embodiments

[0039] If based on Figures 1 to 14 the embodiments of the present invention are described as follows. Hereinafter, for convenience of explanation, components having the same function as those described in a specific embodiment may be denoted by the same reference numerals, and their description may be omitted.

[0040] [Embodiment 1]

[0041] Figure 2 Fig. (a) is a diagram showing a display pattern (remaining pattern) displayed on the display panel of the display device as a comparative example, Figure 2 Fig. (b) is a diagram showing the degree of degradation of the light-emitting elements caused by the display pattern shown in (a). In addition, Figure 2 the pixels P1-1 to P1-7, P2-1 to P2-7, and P3-1 to P3-7 of the display panel shown in Figs. (a) and Figure 2 (b) have the same structure as the pixels P1 to P4 shown in Figure 15 . In each pixel, the size of the blue sub-pixel BSP is larger than the size of the green sub-pixel GSP and the size of the red sub-pixel RSP, and the size of the green sub-pixel GSP is larger than the size of the red sub-pixel RSP.

[0042] Regarding Figure 2 each of the pixels P1-1 to P1-7, P2-1 to P2-7, and P3-1 to P3-7 of the display panel shown in Fig. (a) Figure 2After the specified display pattern shown in (a) has remained for 250 hours, as shown in Figure 2 (b), while displaying each pixel P1-1 to P1-7, P2-1 to P2-7, and P3-1 to P3-7 in green with a gray scale of 255, by measuring the display state, estimate according to Figure 2 the degree of deterioration of the green light-emitting elements included in the green sub-pixels of each pixel of the display pattern shown in (a). In addition, when observing the display state, noise correction of measurement values, differential emphasis, etc. can also be appropriately performed.

[0043] As shown in Figure 2 (a), pixel P2-3 remains for 250 hours in the display pattern of green with a gray scale of 255 (R0, G255, B0), and pixel P2-4 remains for 250 hours in the display patterns of red with a gray scale of 255, green with a gray scale of 255, and blue with a gray scale of 255 (R255, G255, B255). After that, as shown in Figure 2 (b), while displaying pixel P2-3 and pixel P2-4 in green with a gray scale of 255 (R0, G255, B0), observe the display states of these two pixels. Thus, it is possible to compare the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-3 and the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-4.

[0044] As shown in Figure 2 (b), compared with pixel P2-3, pixel P2-4 is displayed darker. This means that the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-4 after remaining for 250 hours in the display pattern of red with a gray scale of 255, green with a gray scale of 255, and blue with a gray scale of 255 (R255, G255, B255) is greater than the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-3 after remaining for 250 hours in the display pattern of green with a gray scale of 255 (R0, G255, B0).

[0045] As described above, in either pixel P2-3 or pixel P2-4, the green light-emitting elements included in the green sub-pixels are lit at a gray scale of 255 for 250 hours under the same conditions, but the degree of deterioration varies depending on the lighting state of the light-emitting elements included in the adjacent sub-pixels. In pixel P2-3, the red light-emitting elements included in the red sub-pixels and the blue light-emitting elements included in the blue sub-pixels are not lit at a gray scale of 0, while in pixel P2-4, the red light-emitting elements included in the red sub-pixels and the blue light-emitting elements included in the blue sub-pixels are lit at a gray scale of 255. Therefore, the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-4 is greater than the degree of deterioration of the green light-emitting elements included in the green sub-pixel of pixel P2-3.

[0046] Thus, as a reason for the difference in the degree of degradation, it can be considered that due to the lighting of the red light-emitting elements included in adjacent red sub-pixels and the blue light-emitting elements included in the blue sub-pixels, the green light-emitting elements included in the green sub-pixels are affected by leakage (crosstalk), heat, etc.

[0047] Therefore, the inventors of the present invention have proposed a display device and a driving method for the display device that can compensate for the degradation amount of the light-emitting elements with higher accuracy, taking into account the degree of degradation caused by the lighting state (light-emitting state) of the light-emitting elements included in adjacent sub-pixels.

[0048] Figure 1 It is a diagram showing a schematic configuration of the display device 10 according to the first embodiment.

[0049] As Figure 1 shown, the display device 10 includes a display panel 1 and a circuit unit 11. In the present embodiment, the circuit unit 11 is described by taking an example in which it includes a signal compensation processing unit 2, a display control unit 3, an arithmetic unit 4, and a history information storage unit 5, but it is not limited thereto.

[0050] The display panel 1 has a plurality of pixels in the display area, and each of the plurality of pixels has a plurality of sub-pixels. Each of the plurality of sub-pixels includes a light-emitting element, and the light-emitting element may be, for example, an OLED or a QLED.

[0051] The signal compensation processing unit 2 is a circuit that calculates a compensation value for the light-emitting element included in the corresponding sub-pixel (coordinates x, y of the sub-pixel) based on the degradation amount D(x, y, t-1)·D(x, y, t) of the light-emitting element included in the corresponding sub-pixel, performs signal compensation processing on the input image signal based on the compensation value, and outputs it as image signal data RGD, BGD, GGD. In addition, the degradation amount D(x, y, t-1)·D(x, y, t) of the light-emitting element included in the corresponding sub-pixel is sent from the history information storage unit 5 to the signal compensation processing unit 2.

[0052] In addition, the previous degradation amount D(x, y, t-1) refers to the cumulative degradation amount of the light-emitting element included in the corresponding sub-pixel (coordinates x, y of the sub-pixel) from time 0 to t-1, and the current degradation amount D(x, y, t) refers to the cumulative degradation amount of the light-emitting element included in the corresponding sub-pixel (coordinates x, y of the sub-pixel) from time 0 to t. It can be obtained by adding the degradation amount of the light-emitting element included in the corresponding sub-pixel (coordinates x, y of the sub-pixel) from time t-1 to t to the previous degradation amount D(x, y, t-1).

[0053] When the display device 10 changes from off to on, the previous degradation amount D(x, y, t - 1) is sent from the historical information memory 5 to the signal compensation processing unit 2. In the signal compensation processing unit 2, based on the previous degradation amount D(x, y, t - 1), the compensation value of the light-emitting element included in the corresponding sub-pixel (the coordinates x, y of the sub-pixel) is calculated, and the input image signal is subjected to signal compensation processing based on the compensation value.

[0054] After that, in the arithmetic unit 4, after obtaining the current degradation amount D(x, y, t), the current degradation amount D(x, y, t) is sent from the historical information memory 5 to the signal compensation processing unit 2. In the signal compensation processing unit 2, the compensation value of the light-emitting element included in the corresponding sub-pixel (the coordinates x, y of the sub-pixel) is calculated based on the current degradation amount D(x, y, t), and the input image signal is subjected to signal compensation processing based on the compensation value.

[0055] The display control unit 3 is a drive circuit that drives the light-emitting elements included in the respective sub-pixels of the display panel 1 based on the image signal data RGD, BGD, GGD that has undergone signal compensation processing to perform display. The image signal data RGD, BGD, GGD includes coordinate data indicating the position of the sub-pixel and a grayscale value. The display control unit 3 can be provided, for example, on the display panel 1 or externally connected to the display panel 1.

[0056] The arithmetic unit 4 calculates the current degradation amount D(x, y, t) of the light-emitting element included in the corresponding sub-pixel (the coordinates x, y of the sub-pixel) based on the previous degradation amount D(x, y, t - 1) of the light-emitting element included in the corresponding sub-pixel (the coordinates x, y of the sub-pixel) sent from the historical information memory 5, and the grayscale value or the lighting period of the sub-pixels adjacent to the corresponding sub-pixel (the coordinates x, y of the sub-pixel) between time t - 1 and t, that is, the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the corresponding sub-pixel (the coordinates x, y of the sub-pixel) between time t - 1 and t. In addition, the current degradation amount D(x, y, t) calculated by the arithmetic unit 4 is sent to the signal compensation processing unit 2 via the historical information memory 5. In the signal compensation processing unit 2, based on the current degradation amount D(x, y, t), the compensation value of the light-emitting element included in the corresponding sub-pixel (the coordinates x, y of the sub-pixel) is calculated, the input image signal is subjected to signal compensation processing based on the compensation value, and is output as the image signal data RGD, BGD, GGD.

[0057] In the present embodiment, the case where the arithmetic unit 4 calculates the degradation amount D(x, y, t) and the signal compensation processing unit 2 calculates the compensation value is described as an example, but it is not limited thereto. For example, both the degradation amount D(x, y, t) and the compensation value can be calculated by the arithmetic unit 4. In this case, the arithmetic unit 4 sends the compensation value to the signal compensation processing unit 2.

[0058] In addition, data representing the light emission states of the light-emitting elements included in the sub-pixels adjacent to the corresponding sub-pixels (coordinates x, y of the sub-pixels) of the display panel 1 can be obtained by counting, for example with a counter, the number of gray levels or the lighting periods of the image signal data RGD, BGD, GGD that have undergone signal compensation processing and are provided from the signal compensation processing unit 2 to the arithmetic unit 4.

[0059] The history information memory 5 is preferably constituted by a non-volatile memory. In the case of using a non-volatile memory with a limited number of write times, it is also possible to use a volatile memory for storage during the operation of the display device 10 and write to the non-volatile memory at regular intervals.

[0060] Figure 3 It is a diagram showing a schematic configuration of a pixel P of the display panel 1 included in the display device 10 according to the first embodiment.

[0061] As Figure 3 shown, each pixel P of the display panel 1 is composed of a red sub-pixel RSP, a green sub-pixel GSP, and a blue sub-pixel BSP. In addition, in the present embodiment, the case where the red sub-pixel RSP, the green sub-pixel GSP, and the blue sub-pixel BSP have the same shape and the same size is taken as an example for description, but it is not limited thereto.

[0062] Each red sub-pixel RSP includes a red light-emitting element (not shown), each green sub-pixel GSP includes a green light-emitting element (not shown), and each blue sub-pixel BSP includes a blue light-emitting element (not shown).

[0063] In the present embodiment, the case of calculating Figure 3 the current degradation amount D(x, y, t) of the light-emitting element included in the first sub-pixel SP(x, y) in and calculating the compensation value of the light-emitting element included in the first sub-pixel SP(x, y) based on the current degradation amount D(x, y, t) of the light-emitting element included in the first sub-pixel SP(x, y) is taken as an example for description, but compensation values can also be calculated in the same way for the light-emitting elements included in other sub-pixels.

[0064] As Figure 3As shown, the first sub-pixel SP(x, y) including a first light-emitting element (not shown) is surrounded by eight sub-pixels of a second sub-pixel SP(x - 1, y) adjacent to the first sub-pixel SP(x, y) and including a second light-emitting element (not shown). The eight sub-pixels further include: a third sub-pixel SP(x - 1, y + 1) adjacent to the first sub-pixel SP(x, y) and including a third light-emitting element (not shown); a fourth sub-pixel SP(x, y + 1) adjacent to the first sub-pixel SP(x, y) and including a fourth light-emitting element (not shown); a fifth sub-pixel SP(x + 1, y + 1) adjacent to the first sub-pixel SP(x, y) and including a fifth light-emitting element (not shown); a sixth sub-pixel SP(x + 1, y) adjacent to the first sub-pixel SP(x, y) and including a sixth light-emitting element (not shown); a seventh sub-pixel SP(x + 1, y - 1) adjacent to the first sub-pixel SP(x, y) and including a seventh light-emitting element (not shown); an eighth sub-pixel SP(x, y - 1) adjacent to the first sub-pixel SP(x, y) and including an eighth light-emitting element (not shown); and a ninth sub-pixel SP(x - 1, y - 1) adjacent to the first sub-pixel SP(x, y) and including a ninth light-emitting element (not shown).

[0065] The degradation amount of the light-emitting element included in the first sub-pixel SP(x, y) is calculated based on the light-emitting states of the second light-emitting element, the third light-emitting element, the fourth light-emitting element, the fifth light-emitting element, the sixth light-emitting element, the seventh light-emitting element, the eighth light-emitting element, and the ninth light-emitting element.

[0066] As Figure 3 shown, the first sub-pixel SP(x, y), the second sub-pixel SP(x - 1, y), the third sub-pixel SP(x - 1, y + 1), the fourth sub-pixel SP(x, y + 1), the fifth sub-pixel SP(x + 1, y + 1), the sixth sub-pixel SP(x + 1, y), the seventh sub-pixel SP(x + 1, y - 1), the eighth sub-pixel SP(x, y - 1), and the ninth sub-pixel SP(x - 1, y - 1) are arranged in a 3-row and 3-column matrix, and the first sub-pixel SP(x, y) is the sub-pixel arranged in the second row and the second column.

[0067] In the present embodiment, an example is described in which the degradation amount D(x, y, t) of the current time of the light-emitting element included in the first sub-pixel SP(x, y) is calculated by the following (Equation 1), but it is not limited thereto.

[0068] [Mathematical Equation 1]

[0069]

[0070] In the above (Equation 1), x and y are the coordinates of the first sub-pixel SP(x, y) including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, F{G(x, y)} is the degradation amount of the first light-emitting element without considering the influence brought by the sub-pixels adjacent to the first sub-pixel, α{i, j} is a weighting coefficient based on the positional relationship with the first sub-pixel SP(x, y), and β[F{G(x + i, y + j)}] is a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), which is determined by the gray value or lighting period of the sub-pixels adjacent to the first sub-pixel SP(x, y).

[0071] In addition, when i and j are 0, α{0, 0} and β[F{G(x, y)}] are set to 0 or 1.

[0072] The weighting coefficient α{i, j} based on the positional relationship with the first sub-pixel SP(x, y) is a coefficient determined by the positional relationship between the first sub-pixel SP(x, y) and the sub-pixels adjacent to the first sub-pixel SP(x, y). For example, when the distance between the first sub-pixel SP(x, y) and the sub-pixels adjacent to the first sub-pixel SP(x, y) is relatively close, the sub-pixels adjacent to the first sub-pixel SP(x, y) have a greater influence on the first sub-pixel SP(x, y), so α{i, j} can be set larger. On the other hand, when the distance between the first sub-pixel SP(x, y) and the sub-pixels adjacent to the first sub-pixel SP(x, y) is relatively far, the sub-pixels adjacent to the first sub-pixel SP(x, y) have a smaller influence on the first sub-pixel SP(x, y), so α{i, j} can be set smaller, for example, approximately set to 1. In addition, when the influence of the sub-pixels adjacent to the first sub-pixel SP(x, y) on the first sub-pixel SP(x, y) is negligible, α{i, j} may not be used.

[0073] In the present embodiment, as described above, the degradation promotion coefficient β[F{G(x+i, y+j)}] is taken as an example to represent the degree of influence on the first sub-pixel SP(x, y) derived from data indicating the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) of the display panel 1 obtained by, for example, counting the number of gray-scale values or the lighting period of the image signal data RGD·BGD·GGD that has undergone signal compensation processing and is supplied from the signal compensation processing unit 2 to the arithmetic unit 4 by a counter. However, the present invention is not limited thereto. For example, the degradation promotion coefficient β[F{G(x+i, y+j)}] may also be a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the degradation amount of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) (the degradation amount without considering the influence of adjacent sub-pixels).

[0074] According to the above (Equation 1), D(x, y, t) = D(x, y, t-1) + α{-1, -1}β[F{G(x-1, y-1)}]F{G(x, y)} + α{-1, 0}β[F{G(x-1, y)}]F{G(x, y)} + α{-1, +1}β[F{G(x-1, y+1)}]F{G(x, y)} + α{0, -1}β[F{G(x, y-1)}]F{G(x, y)} + α{0, 0}β[F{G(x, y)}]F{G(x, y)} + α{0, +1}β[F{G(x, y+1)}]F{G(x, y)} + α{+1, -1}β[F{G(x+1, y-1)}]F{G(x, y)} + α{+1, 0}β[F{G(x+1, y)}]F{G(x, y)} + α{+1, +1}β[F{G(x+1, y+1)}]F{G(x, y)}. When i and j are 0, α{0, 0}β[F{G(x, y)}] is 0 or 1, so α{0, 0}β[F{G(x, y)}]F{G(x, y)} is 0 or F{G(x, y)}.

[0075] In the above (Equation 1), in the case where i and j are 0, α{0,0}β[F{G(x, y)}]F{G(x, y)} is a value representing the influence of the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y) on the degradation of the first light-emitting element included in the first sub-pixel SP(x, y) itself as its own sub-pixel. In addition, the degradation promotion coefficient β[F{G(x, y)}] in this case is a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y), but is not limited thereto. For example, the degradation promotion coefficient β[F{G(x, y)}] may also be a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the degradation amount of the first light-emitting element included in the first sub-pixel SP(x, y).

[0076] The above-mentioned weighting coefficient α{i, j} and degradation promotion coefficient β[F{G(x + i, y + j)}] based on the positional relationship with the first sub-pixel SP(x, y) vary depending on the product of each display device. Therefore, by making these coefficients variable, it is possible to correspond to the products of various display devices.

[0077] As described above, data representing the light emission state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) of the display panel 1 and the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y) can be obtained, for example, by the counter included in the arithmetic unit 4 counting the number of gray values or the lighting period of the image signal data RGD, BGD, GGD that have undergone signal compensation processing and are supplied from the signal compensation processing unit 2 to the arithmetic unit 4 (also referred to as the data counting method).

[0078] As data representing the light emission state of the corresponding light-emitting elements, data obtained by a method other than the above data counting method can be used. For example, the degradation amount of the corresponding light-emitting elements can also be used. For example, the degradation amount F{G(x, y)} of the first light-emitting element in the case of not considering the influence of the sub-pixels adjacent to the first sub-pixel SP(x, y) and the degradation amount F{G(x + i, y + j)} of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) can also be obtained based on the usage time of the display device 10. Without being limited thereto, these degradation amounts can also be obtained using the data counting method as described above.

[0079] As Figure 3As shown, in the present embodiment, the range of adjacent sub-pixels that affects the degradation amount of the first light-emitting element included in the first sub-pixel SP(x, y) is set as region R1. In the above (Equation 1), the cases where i = -1, 0, +1 and j = -1, 0, +1 are illustrated, but it is not limited thereto, and the range of adjacent sub-pixels that affects the degradation amount of the first light-emitting element included in the first sub-pixel SP(x, y) can be appropriately set.

[0080] In addition, in the present embodiment, since the red sub-pixels RSP, green sub-pixels GSP, and blue sub-pixels BSP of each pixel P constituting the display panel 1 have the same shape and the same size, the value of the weighting coefficient α{i, j} based on the positional relationship with the first sub-pixel SP(x, y) can also be a fixed value regardless of the values of i and j when i and j are other than 0. For example, α{-1, -1}, α{0, -1}, α{+1, -1}, α{-1, 0}, α{+1, 0}, α{-1, +1}, α{0, +1}, and α{+1, +1} can all be 1.

[0081] Figure 4 (a) of is a diagram showing a display pattern of white 255 grayscale displayed on each pixel P of the display panel 1 included in the display device 10 of Embodiment 1. Figure 4 (b) of is a diagram showing a display pattern of green 255 grayscale displayed on each pixel P of the display panel 1 included in the display device 10 of Embodiment 1.

[0082] In Figure 4 In the display panel 1 shown in (a) of, since a display pattern of white 255 grayscale is displayed on each pixel P, the light-emitting states of the respective light-emitting elements included in the 8 sub-pixels surrounding the first sub-pixel SP(x, y) all become lit at 255 grayscale.

[0083] On the other hand, in Figure 4 In the display panel 1 shown in (b) of, since a display pattern of green 255 grayscale is displayed on each pixel P, the light-emitting states of the respective light-emitting elements included in the 8 sub-pixels surrounding the first sub-pixel SP(x, y) become such that only the light-emitting elements included in the sub-pixel on the first sub-pixel SP(x, y) and the light-emitting elements included in the sub-pixel under the first sub-pixel SP(x, y) are lit at 255 grayscale.

[0084] Figure 5 is a diagram for explaining the compensation for the degradation of the light-emitting elements performed in the display device 10 of Embodiment 1.

[0085] Figure 5 W in is Figure 4The amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) in the display panel 1 shown in (a) of Figure 5 where G is Figure 4 The amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) in the display panel 1 shown in (b) of

[0086] As Figure 5 shown, even in a state where the light-emitting element included in the first sub-pixel SP(x, y) itself is lit at the same gray level of 255, it can be known from the light-emitting states of the respective light-emitting elements included in the 8 sub-pixels surrounding the first sub-pixel SP(x, y) that there are significant differences in the amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y).

[0087] As described above, according to the display device 10 or the driving method of the display device 10 of the present embodiment, it is possible to compensate for the amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) considering the influence brought by the light-emitting state of the light-emitting element included in the sub-pixels adjacent to the first sub-pixel SP(x, y). Furthermore, it is possible to obtain the amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) with higher accuracy. Based on the amount of degradation obtained with such high accuracy, as Figure 5 shown, it is possible to calculate the compensation value WH for the amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) of the display panel 1 shown in (a) of Figure 4 and the compensation value GH for the amount of degradation of the light-emitting element included in the first sub-pixel SP(x, y) of the display panel 1 shown in (b) of Figure 4 . Therefore, it is possible to compensate for the amount of degradation of the light-emitting element with higher accuracy.

[0088] 〔Embodiment 2〕

[0089] Hereinafter, Figure 6 Embodiment 2 of the present invention will be described. The arithmetic unit 4a included in the circuit unit 11a of the display device 10a of the present embodiment uses a different formula in the calculation of the current amount of degradation D(x, y, t) of the light-emitting element included in the first sub-pixel SP(x, y) from that of the above-described Embodiment 1. For the rest, it is as described in Embodiment 1. For the sake of convenience of explanation, components having the same functions as those shown in the drawings of Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted.

[0090] Figure 6 is a diagram showing a schematic configuration of the display device 10a of Embodiment 2.

[0091] As Figure 6As shown, the display device 10a has an arithmetic unit 4a, and the arithmetic unit 4a calculates the current degradation amount D(x, y, t) of the light-emitting element included in the first sub-pixel SP(x, y) by the following (Equation 2).

[0092] [Mathematical formula 2]

[0093]

[0094] In the above (Equation 2), x and y are the coordinates of the first sub-pixel SP(x, y) including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, α{i, j} is a weighting coefficient based on the positional relationship with the first sub-pixel SP(x, y), and β[F{G(x + i, y + j)}] is a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the light-emitting state of the light-emitting element included in the sub-pixel adjacent to the first sub-pixel SP(x, y) determined by the gray value or lighting period of the sub-pixel adjacent to the first sub-pixel SP(x, y).

[0095] In addition, when i and j are 0, α{0, 0} and β[F{G(x, y)}] are set to 0 or 1.

[0096] In the arithmetic unit 4a included in the circuit unit 11a of the display device 10a, in the above (Equation 2) used in the calculation of the current degradation amount D(x, y, t) of the light-emitting element included in the first sub-pixel SP(x, y), the difference from the above (Equation 1) of the first embodiment is that the degradation amount F{G(x, y)} of the first light-emitting element when not considering the influence of the sub-pixels adjacent to the first sub-pixel SP(x, y) in the above (Equation 1) of the first embodiment is set to 1.

[0097] According to the above (Equation 2), D(x, y, t) = D(x, y, t - 1) + α{-1, -1}β[F{G(x - 1, y - 1)}] + α{-1, 0}β[F{G(x - 1, y)}] + α{-1, +1}β[F{G(x - 1, y + 1)}] + α{0, -1}β[F{G(x, y - 1)}] + α{0, 0}β[F{G(x, y)}] + α{0, +1}β[F{G(x, y + 1)}] + α{+1, -1}β[F{G(x + 1, y - 1)}] + α{+1, 0}β[F{G(x + 1, y)}] + α{+1, +1}β[F{G(x + 1, y + 1)}].

[0098] In the above (Formula 2), in the case where i and j are 0, α{0, 0}β[F{G(x, y)}] is a value representing the influence of the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y) on the deterioration of the first light-emitting element included in the first sub-pixel SP(x, y) which is its own sub-pixel.

[0099] In addition, in the present embodiment, since the red sub-pixels RSP, green sub-pixels GSP, and blue sub-pixels BSP of each pixel P constituting the display panel 1 have the same shape and the same size, the value of the weighting coefficient α{i, j} of the deterioration amount of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) can also be a fixed value regardless of the values of i and j in the case where i and j are other than 0. For example, α{-1, -1}, α{0, -1}, α{+1, -1}, α{-1, 0}, α{+1, 0}, α{-1, +1}, α{0, +1}, and α{+1, +1} can all be 1.

[0100] As described above, according to the display device 10a or the driving method of the display device 10a of the present embodiment, it is possible to compensate for the deterioration amount of the light-emitting elements included in the first sub-pixel SP(x, y) in consideration of the influence brought by the light emission state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y). Furthermore, it is possible to obtain the deterioration amount of the light-emitting elements included in the first sub-pixel SP(x, y) with higher accuracy, and based on the deterioration amount obtained with such high accuracy, it is possible to compensate for the deterioration amount of the light-emitting elements with higher accuracy.

[0101] 〔Embodiment Three〕

[0102] Hereinafter, based on Figures 7 to 9 Embodiment Three of the present invention will be described. The display device 10b of the present embodiment is different from the display devices described in Embodiment One and Embodiment Two in that it includes a display panel 1a having a different sub-pixel arrangement. For the rest, it is as described in Embodiment One and Embodiment Two. For the sake of convenience of description, components having the same functions as those shown in the drawings of Embodiment One and Embodiment Two are labeled with the same reference numerals, and their descriptions are omitted.

[0103] Figure 7 (a) of is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the green sub-pixel GSP of the display panel 1a included in the display device 10b of Embodiment Three, Figure 7 (b) of is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the red sub-pixel RSP of the display panel 1a included in the display device 10b of Embodiment Three, Figure 7Figure (c) is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the blue sub-pixel BSP of the display panel 1a of Embodiment 3.

[0104] As Figure 7 (a), Figure 7 of (b) and Figure 7 of (c) show, each pixel P of the display panel 1a is composed of a red sub-pixel RSP, a green sub-pixel GSP, and a blue sub-pixel BSP. The size of the blue sub-pixel BSP is larger than the size of the red sub-pixel RSP and the size of the green sub-pixel GSP, and the size of the green sub-pixel GSP is larger than the size of the red sub-pixel RSP.

[0105] In the present embodiment, as Figure 7 shown in (a), the range of adjacent sub-pixels that affects the deterioration amount of the green light-emitting elements (first light-emitting elements) included in the first sub-pixel SP(x, y) for green of the display panel 1a is set as region R2. In addition, as Figure 7 shown in (b), the range of adjacent sub-pixels that affects the deterioration amount of the red light-emitting elements (first light-emitting elements) included in the first sub-pixel SP(x, y) for red of the display panel 1a is set as region R3. Further, as Figure 7 shown in (c), the range of adjacent sub-pixels that affects the deterioration amount of the blue light-emitting elements (first light-emitting elements) included in the first sub-pixel SP(x, y) for blue of the display panel 1a is set as region R4.

[0106] As Figure 7 shown in (a), the first sub-pixel SP(x, y) for green of the display panel 1a is surrounded by six sub-pixels: a second sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured on the left side of the first sub-pixel for green) and including a red light-emitting element (second light-emitting element), a third sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured above the first sub-pixel for green) and including a blue light-emitting element (third light-emitting element), a fourth sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured in the upper right of the first sub-pixel for green) and including a blue light-emitting element (fourth light-emitting element), a fifth sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured on the right side of the first sub-pixel for green) and including a red light-emitting element (fifth light-emitting element), a sixth sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured in the lower right of the first sub-pixel for green) and including a blue light-emitting element (sixth light-emitting element), and a seventh sub-pixel adjacent to the first sub-pixel SP(x, y) for green (configured below the first sub-pixel for green) and including a blue light-emitting element (seventh light-emitting element).

[0107] Further, the amount of deterioration of the green light-emitting element (first light-emitting element) included in the green first sub-pixel SP(x, y) is calculated based on the light-emitting states of the red light-emitting elements (second light-emitting elements), blue light-emitting elements (third light-emitting elements), blue light-emitting elements (fourth light-emitting elements), red light-emitting elements (fifth light-emitting elements), blue light-emitting elements (sixth light-emitting elements), and blue light-emitting elements (seventh light-emitting elements) respectively included in these 6 sub-pixels.

[0108] As Figure 7 As shown in (b) of [], the red first sub-pixel SP(x, y) of the display panel 1a is surrounded by 6 sub-pixels, namely, a second sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged on the left side of the red first sub-pixel) and including a green light-emitting element (second light-emitting element), a third sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged in the upper left of the red first sub-pixel) and including a blue light-emitting element (third light-emitting element), a fourth sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged above the red first sub-pixel) and including a blue light-emitting element (fourth light-emitting element), a fifth sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged on the right side of the red first sub-pixel) and including a green light-emitting element (fifth light-emitting element), a sixth sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged below the red first sub-pixel) and including a blue light-emitting element (sixth light-emitting element), and a seventh sub-pixel adjacent to the red first sub-pixel SP(x, y) (arranged in the lower left of the red first sub-pixel) and including a blue light-emitting element (seventh light-emitting element).

[0109] Further, the amount of deterioration of the red light-emitting element (first light-emitting element) included in the red first sub-pixel SP(x, y) is calculated based on the light-emitting states of the green light-emitting elements (second light-emitting elements), blue light-emitting elements (third light-emitting elements), blue light-emitting elements (fourth light-emitting elements), green light-emitting elements (fifth light-emitting elements), blue light-emitting elements (sixth light-emitting elements), and blue light-emitting elements (seventh light-emitting elements) respectively included in these 6 sub-pixels.

[0110] As Figure 7As shown in (a) of , the blue first sub-pixel SP(x, y) of the display panel 1a is surrounded by ten sub-pixels, including a second sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured on the left side of the blue first sub-pixel) and containing a blue light-emitting element (second light-emitting element), a third sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured in the upper left of the blue first sub-pixel) and containing a green light-emitting element (third light-emitting element), a fourth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured above the blue first sub-pixel) and containing a red light-emitting element (fourth light-emitting element), a fifth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured above the blue first sub-pixel) and containing a green light-emitting element (fifth light-emitting element), a sixth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured in the upper right of the blue first sub-pixel) and containing a red light-emitting element (sixth light-emitting element), a seventh sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured on the right side of the blue first sub-pixel) and containing a blue light-emitting element (seventh light-emitting element), an eighth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured in the lower right of the blue first sub-pixel) and containing a red light-emitting element (eighth light-emitting element), a ninth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured below the blue first sub-pixel) and containing a green light-emitting element (ninth light-emitting element), a tenth sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured below the blue first sub-pixel) and containing a red light-emitting element (tenth light-emitting element), and an eleventh sub-pixel adjacent to the blue first sub-pixel SP(x, y) (configured in the lower left of the blue first sub-pixel) and containing a green light-emitting element (eleventh light-emitting element).

[0111] Moreover, the degradation amount of the blue light-emitting element (first light-emitting element) included in the blue first sub-pixel SP(x, y) is calculated based on the light-emitting states of the blue light-emitting elements (second light-emitting elements), green light-emitting elements (third light-emitting elements), red light-emitting elements (fourth light-emitting elements), green light-emitting elements (fifth light-emitting elements), red light-emitting elements (sixth light-emitting elements), blue light-emitting elements (seventh light-emitting elements), red light-emitting elements (eighth light-emitting elements), green light-emitting elements (ninth light-emitting elements), red light-emitting elements (tenth light-emitting elements), and green light-emitting elements (eleventh light-emitting elements) respectively included in these ten sub-pixels.

[0112] Figure 8FIG. (a) is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the green sub-pixels of the display panel 1a included in the display device 10b according to the third embodiment. Figure 8 FIG. (b) is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the red sub-pixels of the display panel 1a included in the display device 10b according to the third embodiment. Figure 8 FIG. (c) is a diagram for explaining a method of calculating the deterioration amount of the light-emitting elements included in the blue sub-pixels of the display panel 1a included in the display device 10b according to the third embodiment.

[0113] Figure 9 is a diagram showing a schematic configuration of the display device 10b according to the third embodiment.

[0114] As Figure 9 shown, the circuit unit 11b of the display device 10b further includes an adjacent pixel definition unit 6 that defines sub-pixels adjacent to the first sub-pixel SP(x, y).

[0115] The adjacent pixel definition unit 6 has data that defines regions of adjacent sub-pixels defined for each sub-pixel of each color. For example, as Figure 7 shown in FIG. (a), for the green first sub-pixel SP(x, y) of the display panel 1a, the region R2 is defined, and as Figure 7 shown in FIG. (b), for the red first sub-pixel SP(x, y) of the display panel 1a, the region R3 is defined, and as Figure 7 shown in FIG. (c), for the blue first sub-pixel SP(x, y) of the display panel 1a, the region R4 is defined.

[0116] As Figure 9 shown, since the image signal data RGD, BGD, GGD sent from the signal compensation processing unit 2 to the arithmetic unit 4 includes coordinate data indicating the position of the sub-pixel, that is, address data, based on the data that defines the regions of adjacent sub-pixels defined for each sub-pixel of each color sent from the adjacent pixel definition unit 6 to the arithmetic unit 4, as Figure 8 shown in FIG. (a), Figure 8 shown in FIG. (b), and Figure 8 shown in FIG. (c), the deterioration amount can be calculated.

[0117] As Figure 8 shown in FIG. (a), in the process of calculating the deterioration amount of the light-emitting elements included in the green sub-pixels of the display panel 1a included in the display device 10b, based on the data of the defined region R2 sent from the adjacent pixel definition unit 6 to the arithmetic unit 4, the deterioration amount can be calculated using only the coordinate data indicating the position of the specified sub-pixel, that is, the image signal data RGD, BGD, GGD having the specified address data. In addition, as Figure 8As shown in (b), in the process of calculating the degradation amount of the light-emitting elements included in the red sub-pixels of the display panel 1a included in the display device 10b, based on the data of the defined region R3 sent from the adjacent pixel defining unit 6 to the arithmetic unit 4, it is possible to calculate the degradation amount only by using the coordinate data indicating the positions of the specified sub-pixels, that is, the image signal data RGD, BGD, GGD having the specified address data. Further, as Figure 8 shown in (c), in the process of calculating the degradation amount of the light-emitting elements included in the blue sub-pixels of the display panel 1a included in the display device 10b, based on the data of the defined region R4 sent from the adjacent pixel defining unit 6 to the arithmetic unit 4, it is possible to calculate the degradation amount only by using the coordinate data indicating the positions of the specified sub-pixels, that is, the image signal data RGD, BGD, GGD having the specified address data.

[0118] In the present embodiment, in Figure 7 the current degradation amount D(x, y, t) of the green light-emitting elements (first light-emitting elements) included in the green first sub-pixels SP(x, y) of the display panel 1a shown in (a) or Figure 7 the current degradation amount D(x, y, t) of the red light-emitting elements (first light-emitting elements) included in the red first sub-pixels SP(x, y) of the display panel 1a shown in (b) can be calculated, for example, by the following (Equation 3).

[0119] D(x, y, t) = D(x, y, t - 1) + α1β1F{G(x, y)} + α2β2F{G(x, y)} + α3β3F{G(x, y)} + α4β4F{G(x, y)} + α5β5F{G(x, y)} + α6β6F{G(x, y)} + α7β7F{G(x, y)} (Equation 3)

[0120] In the above (Equation 3), F{G(x, y)} is the deterioration amount of the first light-emitting element included in the first sub-pixel SP(x, y) when the influence brought by the sub-pixels adjacent to the first sub-pixel SP(x, y) is not considered. α1 to α6 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y), respectively. β1 to β6 are deterioration promotion coefficients representing the degree of influence on the first sub-pixel SP(x, y) derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), which are determined by the gray values or lighting periods of the sub-pixels adjacent to the first sub-pixel SP(x, y). α7 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y), and β7 is a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) which is the self-sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel SP(x, y). α7β7 is 0 or 1, so α7β7F{G(x, y)} is 0 or F{G(x, y)}.

[0121] In addition, each of β1 to β6 may also be a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the deterioration amount of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), and β7 may also be a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y), where the first sub-pixel SP(x, y) is the self-sub-pixel derived from the deterioration amount of the first light-emitting element included in the first sub-pixel SP(x, y).

[0122] In the present embodiment, for example, the current deterioration amount D(x, y, t) of the blue first light-emitting element (the first light-emitting element) included in the blue first sub-pixel SP(x, y) of the display panel 1a shown in (c) of Figure 7 can be calculated by the following (Equation 4).

[0123] D(x, y, t) = D(x, y, t - 1) + α1β1F{G(x, y)} + α2β2F{G(x, y)} + α3β3F{G(x, y)} + α4β4F{G(x, y)} + α5β5F{G(x, y)} + α6β6F{G(x, y)} + α7β7F{G(x, y)} + α8β8F{G(x, y)} + α8β8F{G(x, y)} + α9β9F{G(x, y)} + α10β10F{G(x, y)} + α11β11F{G(x, y)} (Equation 4) In the above (Equation 4), F{G(x, y)} is the amount of degradation of the first light-emitting element when the influence brought by the sub-pixels adjacent to the first sub-pixel SP(x, y) is not considered. α1 to α10 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y). β1 to β10 are degradation promotion coefficients representing the degree of influence on the first sub-pixel SP(x, y) derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), determined by the gray values or lighting periods of the sub-pixels adjacent to the first sub-pixel SP(x, y). α11 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y). β11 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) as its own sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel SP(x, y). α11β11 is 0 or 1. Therefore, α11β11F{G(x, y)} is 0 or F{G(x, y)}.

[0124] In addition, each of β1 to β10 may also be a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the amount of degradation of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y). β11 may also be a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y), and the first sub-pixel SP(x, y) is its own sub-pixel derived from the amount of degradation of the first light-emitting element included in the first sub-pixel SP(x, y).

[0125] Figure 7 The current amount of degradation D(x, y, t) of the green light-emitting element (first light-emitting element) included in the green first sub-pixel SP(x, y) of the display panel 1a shown in (a) of Figure 7 The current amount of degradation D(x, y, t) of the red light-emitting element (first light-emitting element) included in the red first sub-pixel SP(x, y) of the display panel 1a shown in (b) of

[0126] In the following (Equation 5), the difference from the above-mentioned (Equation 3) is that the degradation amount F{G(x, y)} of the first light-emitting element when the influence of the sub-pixels adjacent to the first sub-pixel SP(x, y) is not considered is set to 1.

[0127] D(x, y, t) = D(x, y, t - 1) + α1β1 + α2β2 + α3β3 + α4β4 + α5β5 + α6β6 + α7β7 (Equation 5)

[0128] In the above (Equation 5), α1 to α6 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y), and β1 to β6 are degradation promotion coefficients representing the degree of influence on the first sub-pixel SP(x, y) derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), which are determined by the gray values or lighting periods of the sub-pixels adjacent to the first sub-pixel SP(x, y). α7 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y), and β7 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) as its own sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel SP(x, y). In addition, in the above (Equation 5), α7β7 is a value representing the influence of the light-emitting state of the first light-emitting element included in the first sub-pixel SP(x, y) on the degradation of the first light-emitting element included in the first sub-pixel SP(x, y).

[0129] In the present embodiment, for example, instead of the above (Equation 4), the current degradation amount D(x, y, t) of the blue first light-emitting element (first light-emitting element) included in the blue first sub-pixel SP(x, y) of the display panel 1a shown in (c) of the following (Equation 6) can be calculated. Figure 7

[0130] In the following (Equation 6), the difference from the above-mentioned (Equation 4) is that the degradation amount F{G(x, y)} of the first light-emitting element when the influence of the sub-pixels adjacent to the first sub-pixel SP(x, y) is not considered is set to 1.

[0131] D(x, y, t) = D(x, y, t - 1) + α1β1 + α2β2 + α3β3 + α4β4 + α5β5 + α6β6 + α7β7 + α8β8 + α8β8 + α9β9 + α10β10 + α11β11 (Equation 6)

[0132] In the above (Equation 6), α1 to α10 are weighting coefficients based on the positional relationship between the first sub-pixel SP(x, y) and the sub-pixels adjacent to the first sub-pixel SP(x, y), and β1 to β10 are deterioration promotion coefficients representing the degree of influence on the first sub-pixel SP(x, y) derived from the light emission state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), determined by the gray values or lighting periods of the sub-pixels adjacent to the first sub-pixel SP(x, y). α11 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y), and β11 is a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y). In addition, in the above (Equation 6), α11β11 is a value representing the influence of the light emission state of the first light-emitting element included in the first sub-pixel SP(x, y) on the deterioration of the first light-emitting element included in the first sub-pixel SP(x, y).

[0133] In addition, each of β1 to β10 may also be a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y) derived from the deterioration amount of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y), and β11 may also be a deterioration promotion coefficient representing the degree of influence on the first sub-pixel SP(x, y), where the first sub-pixel SP(x, y) is its own sub-pixel derived from the deterioration amount of the first light-emitting element included in the first sub-pixel SP(x, y).

[0134] As Figure shown in (a) of ​ and (b) of

[0135] As can be seen from the above, with respect to the deterioration of the green light-emitting elements included in the green sub-pixels, it is more greatly affected by the light-emitting state of the blue light-emitting elements included in the adjacent blue sub-pixels than by the light-emitting state of the red light-emitting elements included in the adjacent red sub-pixels.

[0136] Therefore, preferably, as in the display panel 1a of the present embodiment, when the size of the blue sub-pixels BSP is larger than the size of the red sub-pixels RSP and the size of the green sub-pixels GSP, that is, when the size of the blue light-emitting elements included in the blue sub-pixels BSP is larger than the size of the red light-emitting elements included in the red sub-pixels RSP and the size of the green light-emitting elements included in the green sub-pixels GSP, the weighting coefficient α based on the positional relationship between the light-emitting elements included in the blue sub-pixels BSP adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y) is set to be greater than the weighting coefficient α based on the positional relationship between the light-emitting elements included in the red sub-pixels RSP adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y) or the weighting coefficient α based on the positional relationship between the light-emitting elements included in the green sub-pixels GSP adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y). The weighting coefficient α based on the positional relationship between the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y) and the first sub-pixel SP(x, y) may also be proportional to the size of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y).

[0137] As described above, according to the display device 10b or the driving method of the display device 10b of the present embodiment, it is possible to compensate for the deterioration amount of the light-emitting elements included in the first sub-pixel SP(x, y), taking into account the influence brought by the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y). Furthermore, it is possible to obtain the deterioration amount of the light-emitting elements included in the first sub-pixel SP(x, y) with higher accuracy. Based on the deterioration amount obtained with such high accuracy, it is possible to compensate for the deterioration amount of the light-emitting elements with higher accuracy.

[0138] 〔Embodiment 4〕

[0139] Hereinafter, based on ​ Embodiment 4 of the present invention will be described. The difference between the display device 10c of the present embodiment and the display device described in Embodiment 3 is that the range of adjacent sub-pixels that affects the deterioration amount of the green light-emitting elements (first light-emitting elements) included in the green first sub-pixel SP(x, y) of the display panel 1a is divided into a first region R5 and a second region R6. For the rest, it is as described in Embodiment 3. For ease of explanation, components having the same functions as those shown in the drawings of Embodiment 3 are denoted by the same reference numerals, and their descriptions are omitted.

[0140] ​ (a) of ​ (b) of ​ and (c) of are diagrams for explaining a method of calculating the amount of degradation of the green light-emitting elements included in the green sub-pixels GSP of the display panel 1a of the display device 10c according to the fourth embodiment.

[0141] ​ is a diagram showing a schematic configuration of the display device 10c according to the fourth embodiment.

[0142] As ​ shown, the circuit unit 11c of the display device 10c further includes an adjacent pixel definition unit 6a that defines sub-pixels adjacent to the first sub-pixel SP(x, y) shown in (a) of ​ .

[0143] The adjacent pixel definition unit 6a, for example, as ​ shown in (a) of, divides the range of adjacent sub-pixels that affect the amount of degradation of the green light-emitting elements (first light-emitting elements) included in the green first sub-pixel SP(x, y) of the display panel 1a into a first region R5 and a second region R6 for definition.

[0144] As ​ shown in (a) of, it includes a first region R5 that is an area up to a certain distance from the center of the green first sub-pixel SP(x, y) of the display panel 1a and a second region R6 that surrounds the first region R5.

[0145] In the present embodiment, the arithmetic unit 4, based on the data related to the first region R5 and the second region R6 sent from the adjacent pixel definition unit 6a, makes the weighting coefficient α based on the positional relationship between the first sub-pixel SP(x, y) and at least a part of the light-emitting elements included in the first region R5 greater than the weighting coefficient α based on the positional relationship between the first sub-pixel SP(x, y) and the light-emitting elements included in only the second region R6, or the two regions of the second region R6 and the outside of the second region R6, and calculates the amount of degradation of the green light-emitting elements (first light-emitting elements) included in the green first sub-pixel SP(x, y) of the display panel 1a.

[0146] The arithmetic unit 4 may also, based on the data related to the first region R5 and the second region R6 sent from the adjacent pixel definition unit 6a, determine the weighting coefficient α based on the positional relationship between the first sub-pixel SP(x, y) and at least a part of the light-emitting elements included in the first region R5 according to the size of the area of the light-emitting elements included in the first region R5.

[0147] Further, the arithmetic unit 4 can also determine a weighting coefficient α indicating the positional relationship between the light-emitting elements included in the first sub-pixel SP(x, y) based on data related to the first region R5 and the second region R6 sent from the adjacent pixel definition unit 6a, according to the size of the area of the light-emitting elements included in the second region R6, based on only the second region R6 or the two regions including the second region R6 and the outside of the second region R6.

[0148] In ​ (b) thereof, a sub-pixel with a weighting coefficient α indicating the positional relationship with the first sub-pixel SP(x, y) being set to 0 (0%) is set to black.

[0149] In the present embodiment, as shown in ​ (c) thereof, the weighting coefficient (α) indicating the positional relationship between the light-emitting elements that completely enter or almost enter the first region (R5) which is a region at a certain distance from the center of the green first sub-pixel SP(x, y) of the display panel 1a and the first sub-pixel SP(x, y) is 25 (25%). Further, the weighting coefficient α indicating the positional relationship between the light-emitting elements that completely enter or almost enter both the first region R5 and the second region R6 and the first sub-pixel SP(x, y) is 10 (10%), and the weighting coefficient α indicating the positional relationship between the light-emitting elements that completely enter the second region R6 or the light-emitting elements with an area of 50% or more of the light-emitting elements and the first sub-pixel SP(x, y) is 5 (5%).

[0150] As described above, according to the display device 10c or the driving method of the display device 10c of the present embodiment, by using different weighting coefficients α according to the distance from the center of the green first sub-pixel SP(x, y) of the display panel 1a, the deterioration amount of the light-emitting elements included in the first sub-pixel SP(x, y) can be obtained. Based on the deterioration amount obtained with such high precision, the deterioration amount of the light-emitting elements can be compensated with higher precision.

[0151] In the present embodiment, the case of calculating the deterioration amount of the light-emitting elements included in the green first sub-pixel SP(x, y) of the display panel 1a has been described as an example, but it is not limited thereto. The deterioration amount of the light-emitting elements included in the blue first sub-pixel SP(x, y) and the deterioration amount of the light-emitting elements included in the red first sub-pixel SP(x, y) can also be calculated in the same manner.

[0152] 〔Embodiment Five〕

[0153] Hereinafter, based on ​Describe Embodiment 5 of the present invention. The display device 10d in this embodiment is different from the display devices described in Embodiments 1 and 2 in that it includes a display panel 1b having a different sub-pixel arrangement. For the rest, it is as described in Embodiments 1 and 2. For ease of explanation, components having the same functions as those shown in the drawings of Embodiments 1 and 2 are labeled with the same reference numerals, and their descriptions are omitted.

[0154] ​ (a) of ​ (b) of ​ and (c) of are diagrams for explaining a method of calculating the degradation amount of the light-emitting elements included in the green sub-pixels GSP of the display panel 1b included in the display device 10d of Embodiment 5.

[0155] As ​ shown in (a), the pixel P1 of the display panel 1b is composed of a green sub-pixel GSP and a blue sub-pixel BSP, the pixel P2 of the display panel 1b is composed of a red sub-pixel RSP and a green sub-pixel GSP, and the pixel P3 of the display panel 1b is composed of a blue sub-pixel BSP and a red sub-pixel RSP. In addition, an example is described in which the red sub-pixel RSP, the green sub-pixel GSP, and the blue sub-pixel BSP have the same shape and the same size, but it is not limited thereto.

[0156] ​ is a diagram showing a schematic configuration of the display device 10d of Embodiment 5.

[0157] In addition, as ​ shown, the circuit unit 11d of the display device 10d further includes an adjacent pixel defining unit 6b that defines a range R7 ( ​ illustrated in (a) of ) of adjacent sub-pixels that affect the degradation amount of the green light-emitting elements (first light-emitting elements) included in the green first sub-pixels SP(x, y) of the display panel 1b.

[0158] As ​As shown in (a) of [reference], the green first sub-pixel SP(x, y) of the display panel 1b is surrounded by eight sub-pixels, including a second sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured on the left side of the green first sub-pixel) and including a red light-emitting element (second light-emitting element), a third sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured in the upper left of the green first sub-pixel) and including a green light-emitting element (third light-emitting element), a fourth sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured above the green first sub-pixel) and including a blue light-emitting element (fourth light-emitting element), a fifth sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured in the upper right of the green first sub-pixel) and including a red light-emitting element (fifth light-emitting element), a sixth sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured on the right side of the green first sub-pixel) and including a blue light-emitting element (sixth light-emitting element), a seventh sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured in the lower right of the green first sub-pixel) and including a green light-emitting element (seventh light-emitting element), an eighth sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured below the green first sub-pixel) and including a red light-emitting element (eighth light-emitting element), and a ninth sub-pixel adjacent to the green first sub-pixel SP(x, y) (configured in the lower left of the green first sub-pixel) and including a blue light-emitting element (ninth light-emitting element). That is, the first to ninth sub-pixels are arranged in a 3-row and 3-column matrix.

[0159] In this embodiment, as shown in ​ (a) of [reference], when the green first sub-pixel SP(x, y) of the display panel 1b is a sub-pixel configured in the second row and the second column, the weighting coefficient α based on the positional relationship between the first sub-pixel SP(x, y) and the light-emitting elements included in the sub-pixels configured in the same row or the same column as the green first sub-pixel SP(x, y) is made greater than the weighting coefficient α based on the positional relationship between the first sub-pixel SP(x, y) and the light-emitting elements included in the sub-pixels configured in different rows and different columns from the green first sub-pixel SP(x, y), and the deterioration amount of the green light-emitting element (first light-emitting element) included in the green first sub-pixel SP(x, y) of the display panel 1b is calculated.

[0160] That is, in the present embodiment, the weighting coefficient α based on the positional relationship between the light-emitting elements included in the adjacent sub-pixels above, below, left, and right of the green first sub-pixel SP(x, y) disposed on the display panel 1b is made greater than the weighting coefficient α based on the positional relationship between the light-emitting elements included in the adjacent sub-pixels above-right, below-right, above-left, and below-left of the green first sub-pixel SP(x, y) disposed on the display panel 1b, and the deterioration amount of the green light-emitting element (first light-emitting element) included in the green first sub-pixel SP(x, y) of the display panel 1b is calculated.

[0161] In ​ In (b) thereof, the sub-pixel with the weighting coefficient α set to 0 (0%) is set to black.

[0162] In the present embodiment, as ​ shown in (c) thereof, the weighting coefficient α based on the positional relationship between the light-emitting elements included in the adjacent sub-pixels above-right, below-right, above-left, and below-left of the green first sub-pixel SP(x, y) disposed on the display panel 1b is set to 10 (10%), and the weighting coefficient α based on the positional relationship between the light-emitting elements included in the adjacent sub-pixels above, below, left, and right of the green first sub-pixel SP(x, y) disposed on the display panel 1b is set to 20 (20%).

[0163] ​ FIG. is a diagram showing an example of another display panel 1b that the display device 10d according to the fifth embodiment can include.

[0164] ​ FIG. is a diagram showing a display panel in which red sub-pixels RSP, green sub-pixels GSP, and blue sub-pixels BSP are arranged in a Pentile configuration.

[0165] Since the display device 10d includes the adjacent pixel defining portion 6b and can freely define the range of adjacent sub-pixels that affect the deterioration amount of the light-emitting element (first light-emitting element) included in the first sub-pixel SP(x, y) of the display panel, as ​ shown, it can also be applied to a display panel in which sub-pixels of each color are arranged in a Pentile configuration.

[0166] As described above, according to the display device 10d or the driving method of the display device 10d according to the present embodiment, it is possible to compensate for the deterioration amount of the light-emitting element included in the first sub-pixel SP(x, y) considering the influence of the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel SP(x, y). Furthermore, it is possible to obtain the deterioration amount of the light-emitting element included in the first sub-pixel SP(x, y) with higher accuracy, and based on the deterioration amount obtained with such high accuracy, it is possible to compensate for the deterioration amount of the light-emitting element with higher accuracy.

[0167] 〔Summary〕

[0168] 〔Mode 1〕

[0169] A display device, comprising: a first sub-pixel including a first light-emitting element; and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element,

[0170] The display device includes a circuit unit that calculates the deterioration amount of the first light-emitting element based on the light-emitting state of the second light-emitting element, and calculates a compensation value for the first light-emitting element based on the calculated deterioration amount of the first light-emitting element.

[0171] 〔Mode 2〕

[0172] The display device according to Mode 1, wherein the first sub-pixel is surrounded by eight sub-pixels including the second sub-pixel,

[0173] The eight sub-pixels further include: a third sub-pixel adjacent to the first sub-pixel and including a third light-emitting element; a fourth sub-pixel adjacent to the first sub-pixel and including a fourth light-emitting element; a fifth sub-pixel adjacent to the first sub-pixel and including a fifth light-emitting element; a sixth sub-pixel adjacent to the first sub-pixel and including a sixth light-emitting element; a seventh sub-pixel adjacent to the first sub-pixel and including a seventh light-emitting element; an eighth sub-pixel adjacent to the first sub-pixel and including an eighth light-emitting element; and a ninth sub-pixel adjacent to the first sub-pixel and including a ninth light-emitting element,

[0174] The circuit unit calculates the deterioration amount of the first light-emitting element based on the light-emitting state of the second light-emitting element, the light-emitting state of the third light-emitting element, the light-emitting state of the fourth light-emitting element, the light-emitting state of the fifth light-emitting element, the light-emitting state of the sixth light-emitting element, the light-emitting state of the seventh light-emitting element, the light-emitting state of the eighth light-emitting element, and the light-emitting state of the ninth light-emitting element.

[0175] 〔Mode 3〕

[0176] The display device according to Mode 1, wherein the first sub-pixel is surrounded by six sub-pixels including the second sub-pixel,

[0177] The six sub-pixels further include: a third sub-pixel adjacent to the first sub-pixel and including a third light-emitting element; a fourth sub-pixel adjacent to the first sub-pixel and including a fourth light-emitting element; a fifth sub-pixel adjacent to the first sub-pixel and including a fifth light-emitting element; a sixth sub-pixel adjacent to the first sub-pixel and including a sixth light-emitting element; and a seventh sub-pixel adjacent to the first sub-pixel and including a seventh light-emitting element.

[0178] The circuit unit calculates the deterioration amount of the first light-emitting element based on the light-emitting states of the second light-emitting element, the third light-emitting element, the fourth light-emitting element, the fifth light-emitting element, the sixth light-emitting element, and the seventh light-emitting element.

[0179] 〔Mode 4〕

[0180] The display device according to Mode 1, wherein the first sub-pixel is surrounded by ten sub-pixels including the second sub-pixel.

[0181] The ten sub-pixels further include: a third sub-pixel adjacent to the first sub-pixel and including a third light-emitting element; a fourth sub-pixel adjacent to the first sub-pixel and including a fourth light-emitting element; a fifth sub-pixel adjacent to the first sub-pixel and including a fifth light-emitting element; a sixth sub-pixel adjacent to the first sub-pixel and including a sixth light-emitting element; a seventh sub-pixel adjacent to the first sub-pixel and including a seventh light-emitting element; an eighth sub-pixel adjacent to the first sub-pixel and including an eighth light-emitting element; a ninth sub-pixel adjacent to the first sub-pixel and including a ninth light-emitting element; a tenth sub-pixel adjacent to the first sub-pixel and including a tenth light-emitting element; and an eleventh sub-pixel adjacent to the first sub-pixel and including an eleventh light-emitting element. The deterioration amount of the light-emitting element included in the first sub-pixel SP(x, y) is calculated based on the light-emitting states of the second light-emitting element, the third light-emitting element, the fourth light-emitting element, the fifth light-emitting element, the sixth light-emitting element, the seventh light-emitting element, the eighth light-emitting element, and the ninth light-emitting element.

[0182] 〔Mode 5〕

[0183] The display device according to any one of Modes 1 to 4, including a first region and a second region surrounding the first region, wherein the first region is a region up to a certain distance from the center of the first sub-pixel.

[0184] The circuit unit makes the weighting coefficient based on the positional relationship between the light-emitting elements included in at least a part of the first region and the first sub-pixel greater than the weighting coefficient based only on the second region or based on the positional relationship between the light-emitting elements included in the second region and the two regions outside the second region, and calculates the deterioration amount of the first light-emitting element.

[0185] 〔Mode 6〕

[0186] In the display device according to Mode 5, the circuit unit determines the weighting coefficient based on the positional relationship between the light-emitting elements included in at least a part of the first region according to the size of the area of the light-emitting elements included in the first region.

[0187] 〔Mode 7〕

[0188] In the display device according to Mode 5 or 6, the weighting coefficient based on the positional relationship between the light-emitting elements included in only the second region or the two regions including the second region and the outside of the second region is determined according to the size of the area of the light-emitting elements included in the second region.

[0189] 〔Mode 8〕

[0190] In the display device according to Mode 2, the first sub-pixel, the second sub-pixel, the third sub-pixel, the fourth sub-pixel, the fifth sub-pixel, the sixth sub-pixel, the seventh sub-pixel, the eighth sub-pixel, and the ninth sub-pixel are arranged in a 3-row and 3-column matrix. When the first sub-pixel is the sub-pixel arranged in the second row and the second column, the weighting coefficient α based on the positional relationship between the light-emitting elements included in the sub-pixels arranged in the same row or the same column as the first sub-pixel is made greater than the weighting coefficient based on the positional relationship between the light-emitting elements included in the sub-pixels arranged in a different row and a different column from the first sub-pixel.

[0191] 〔Mode 9〕

[0192] In the display device according to Mode 2 or 8, in the circuit unit, the deterioration amount D(x, y, t) of the first light-emitting element at the current time is calculated by the following (Equation 1).

[0193] In the following (Equation 1), x and y are the coordinates of the first sub-pixel including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, F{G(x, y)} is the degradation amount of the first light-emitting element when the influence brought by the sub-pixels adjacent to the first sub-pixel is not considered, α{i, j} is a weighting coefficient based on the positional relationship with the first sub-pixel, and β[F{G(x + i, y + j)}] is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray-scale value or lighting period of the sub-pixels adjacent to the first sub-pixel.

[0194] When i and j are 0, α{0, 0} and β[F{G(x, y)}] are 0 or 1.

[0195] [Mathematical formula 1]

[0196]

[0197] [Mode 10]

[0198] In the display device according to Mode 2 or 8, in the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following (Equation 2).

[0199] In the above (Equation 2), x and y are the coordinates of the first sub-pixel including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, α{i, j} is a weighting coefficient based on the positional relationship with the first sub-pixel SP(x, y), and β[F{G(x + i, y + j)}] is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray-scale value or lighting period of the sub-pixels adjacent to the first sub-pixel.

[0200] When i and j are 0, α{0, 0} and β[F{G(x, y)}] are 0 or 1.

[0201] [Mathematical formula 2]

[0202]

[0203] [Mode 11]

[0204] In the display device according to Mode 9 or 10, when i and j are other than 0, the value of α{i, j} is a fixed value regardless of the values of i and j.

[0205] [Mode 12]

[0206] The display device according to Mode 3, characterized in that

[0207] In the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following (Equation 3):

[0208] In the following (Equation 3), F{G(x, y)} is the degradation amount of the first light-emitting element when the influence brought by the sub-pixels adjacent to the first sub-pixel is not considered. α1 to α6 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel and the first sub-pixel respectively. β1 to β6 are degradation promotion coefficients representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray values or lighting periods of the sub-pixels adjacent to the first sub-pixel. α7 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel and the first sub-pixel. β7 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel. α7β7 is 0 or 1.

[0209] D(x, y, t) = D(x, y, t - 1)+α1β1F{G(x, y)}+α2β2F{G(x, y)}+α3β3F{G(x, y)}+α4β4F{G(x, y)}+α5β5F{G(x, y)}+α6β6F{G(x, y)}+α7β7F{G(x, y)} (Equation 3)

[0210] 〔Mode 13〕

[0211] The display device according to Mode 4 or 8, in the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following (Equation 2):

[0212] In the following (Equation 4), F{G(x, y)} is the degradation amount of the first light-emitting element when the influence of the sub-pixels adjacent to the first sub-pixel is not considered. α1 to α10 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel and the first sub-pixel, respectively. β1 to β10 are degradation promotion coefficients representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray value or lighting period of the sub-pixels adjacent to the first sub-pixel, respectively. α11 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel and the first sub-pixel, and β11 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel. α11β11 is 0 or 1.

[0213] D(x, y, t) = D(x, y, t - 1) + α1β1F{G(x, y)} + α2β2F{G(x, y)} + α3β3F{G(x, y)} + α4β4F{G(x, y)} + α5β5F{G(x, y)} + α6β6F{G(x, y)} + α7β7F{G(x, y)} + α8β8F{G(x, y)} + α8β8F{G(x, y)} + α9β9F{G(x, y)} + α10β10F{G(x, y)} + α11β11F{G(x, y)} (Equation 4)

[0214] 〔Mode 14〕

[0215] The display device according to Mode 5, characterized in that

[0216] In the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following (Equation 5),

[0217] In the following (Equation 5), α1 to α6 are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel and the first sub-pixel, respectively. β1 to β6 are degradation promotion coefficients representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray value or lighting period of the sub-pixels adjacent to the first sub-pixel, respectively. α7 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel and the first sub-pixel, and β7 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel. α7β7 is 0 or 1.

[0218] D(x, y, t) = D(x, y, t - 1) + α1β1 + α2β2 + α3β3 + α4β4 + α5β5 + α6β6 + α7β7 (Equation 5)

[0219] 〔Method 15〕

[0220] The display device as described in Method 4, characterized in that

[0221] In the circuit section, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following (Equation 6),

[0222] α1 to α10 in the following (Equation 6) are weighting coefficients based on the positional relationship between the sub-pixels adjacent to the first sub-pixel and the first sub-pixel, respectively, and β1 to β10 are degradation promotion coefficients representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting elements included in the sub-pixels adjacent to the first sub-pixel determined by the gray-scale value or lighting period of the sub-pixels adjacent to the first sub-pixel. α11 is a weighting coefficient based on the positional relationship between the first light-emitting element included in the first sub-pixel and the first sub-pixel, and β11 is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the first light-emitting element included in the first sub-pixel, and α11β11 is 0 or 1.

[0223] D(x, y, t) = D(x, y, t - 1) + α1β1 + α2β2 + α3β3 + α4β4 + α5β5 + α6β6 + α7β7 + α8β8 + α8β8 + α9β9 + α10β10 + α11β11 (Equation 6)

[0224] 〔Method 16〕

[0225] For the display device as described in any one of Methods 5 to 10, 12 to 15, the weighting coefficient based on the positional relationship between the light-emitting element included in the sub-pixel adjacent to the first sub-pixel and the first sub-pixel is proportional to the size of the light-emitting element included in the sub-pixel adjacent to the first sub-pixel.

[0226] 〔Method 17〕

[0227] For the display device as described in any one of Methods 9 to 15, the degradation promotion coefficient is a coefficient derived from the degradation amount of the light-emitting element.

[0228] 〔Method 18〕

[0229] For the display device as described in any one of Methods 1 to 17, the circuit section further includes an adjacent pixel definition section that defines adjacent sub-pixels including the second sub-pixel adjacent to the first sub-pixel.

[0230] 〔Mode 19〕

[0231] A driving method for a display device, which is a driving method for a display device including a first sub-pixel including a first light-emitting element and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element.

[0232] Calculate the degradation amount of the first light-emitting element based on the light-emitting state of the second light-emitting element, and calculate the compensation value of the first light-emitting element based on the calculated degradation amount of the first light-emitting element.

[0233] 〔Supplementary Notes〕

[0234] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Moreover, new technical features can be formed by combining the technical methods disclosed in each embodiment.

[0235] Industrial Applicability

[0236] The present invention can be used for a driving method for a display device and a display device.

[0237] Explanation of Reference Numerals

[0238] 1, 1a, 1b Display panel

[0239] 2 Signal compensation processing unit

[0240] 3 Display control unit

[0241] 4 Arithmetic unit

[0242] 5 Historical information memory

[0243] 6, 6A, 6b Adjacent pixel definition unit

[0244] 10, 10A, 10b, 10c, 10d Display device

[0245] 11, 11A, 11b, 11c, 11d Circuit unit

[0246] SP Sub-pixel

[0247] P Pixel

[0248] RSP Red sub-pixel

[0249] GSP Green sub-pixel

[0250] BSP Blue sub-pixel

[0251] R1 to R4, R7 regions

[0252] First region of R5

[0253] Second region of R6

Claims

1. A display device, comprising: a first sub-pixel including a first light-emitting element; and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element, wherein the display device is characterized in that it includes a circuit unit that calculates a degradation amount of the first light-emitting element based on a light-emitting state of the second light-emitting element, and calculates a compensation value for the first light-emitting element based on the calculated degradation amount of the first light-emitting element. The display device includes a first region of the first sub-pixel and a second region surrounding the first region. The circuit unit makes a weighting coefficient based on a positional relationship between the first sub-pixel and a light-emitting element included in at least a part of the first region greater than a weighting coefficient based only on the second region or based on light-emitting elements included in the second region and two regions outside the second region, and calculates the degradation amount of the first light-emitting element.

2. The display device according to claim 1, wherein the first region is a region up to a certain distance from the center of the first sub-pixel.

3. The display device according to claim 1 or 2, wherein the circuit unit determines a weighting coefficient based on a positional relationship between the first sub-pixel and a light-emitting element included in at least a part of the first region according to a size of an area of the light-emitting element included in the first region.

4. The display device according to claim 1 or 2, wherein a weighting coefficient based on a positional relationship between the first sub-pixel and a light-emitting element included in only the second region or the second region and two regions outside the second region is determined according to a size of an area of the light-emitting element included in the second region.

5. A display device, comprising: a first sub-pixel including a first light-emitting element; and a second sub-pixel adjacent to the first sub-pixel and including a second light-emitting element, wherein the display device is characterized in that it includes a circuit unit that calculates a degradation amount of the first light-emitting element based on a light-emitting state of the second light-emitting element, and calculates a compensation value for the first light-emitting element based on the calculated degradation amount of the first light-emitting element. The first sub-pixel is surrounded by eight sub-pixels including the second sub-pixel. The eight sub-pixels further include: a third sub-pixel adjacent to the first sub-pixel and including a third light-emitting element; a fourth sub-pixel adjacent to the first sub-pixel and including a fourth light-emitting element; a fifth sub-pixel adjacent to the first sub-pixel and including a fifth light-emitting element; a sixth sub-pixel adjacent to the first sub-pixel and including a sixth light-emitting element; a seventh sub-pixel adjacent to the first sub-pixel and including a seventh light-emitting element; an eighth sub-pixel adjacent to the first sub-pixel and including an eighth light-emitting element; and a ninth sub-pixel adjacent to the first sub-pixel and including a ninth light-emitting element. The circuit unit calculates the degradation amount of the first light-emitting element based on the light-emitting states of the second light-emitting element, the third light-emitting element, the fourth light-emitting element, the fifth light-emitting element, the sixth light-emitting element, the seventh light-emitting element, the eighth light-emitting element, and the ninth light-emitting element. The first sub-pixel, the second sub-pixel, the third sub-pixel, the fourth sub-pixel, the fifth sub-pixel, the sixth sub-pixel, the seventh sub-pixel, the eighth sub-pixel, and the ninth sub-pixel are arranged in a 3-row and 3-column matrix. When the first sub-pixel is the sub-pixel arranged in the second row and the second column, the weighting coefficient α based on the positional relationship between the light-emitting element included in the sub-pixel arranged in the same row or the same column as the first sub-pixel and the first sub-pixel is made greater than the weighting coefficient based on the positional relationship between the light-emitting element included in the sub-pixel arranged in a different row and a different column from the first sub-pixel and the first sub-pixel. The display device includes a first region of the first sub-pixel and a second region surrounding the first region. The light-emitting elements at least partially included in the first region are included in the sub-pixels arranged in the same row or the same column as the first sub-pixel, and the light-emitting elements only included in the second region are included in the sub-pixels arranged in a different row and a different column from the first sub-pixel.

6. The display device according to claim 5, wherein In the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following formula 1. In formula 1 below, x and y are the coordinates of the first sub-pixel including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, F{G(x, y)} is the degradation amount of the first light-emitting element without considering the influence brought by the sub-pixels adjacent to the first sub-pixel, α{i, j} is the weighting coefficient based on the positional relationship with the first sub-pixel, and β[F{G(x + i, y + j)}] is the degradation promotion coefficient indicating the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting element included in the sub-pixel adjacent to the first sub-pixel determined by the gray value or the lighting period of the sub-pixel adjacent to the first sub-pixel. When i and j are 0, α{0, 0} and β[F{G(x, y)}] are 0 or 1. Formula 1: 。 7. The display device according to claim 5, wherein In the circuit unit, the current degradation amount D(x, y, t) of the first light-emitting element is calculated by the following formula 2. In Formula 2 below, x and y are the coordinates of the first sub-pixel including the first light-emitting element, t is time, D(x, y, t - 1) is the previous degradation amount of the first light-emitting element, α{i, j} is a weighting coefficient based on the positional relationship with the first sub-pixel SP(x, y), and β[F{G(x + i, y + j)}] is a degradation promotion coefficient representing the degree of influence on the first sub-pixel derived from the light-emitting state of the light-emitting element included in the sub-pixel adjacent to the first sub-pixel determined by the gray value or the lighting period of the sub-pixel adjacent to the first sub-pixel. When i and j are 0, α{0, 0} and β[F{G(x, y)}] are 0 or 1. Formula 2: 。 8. The display device according to claim 6 or 7, wherein: When i and j are other than 0, the value of α{i, j} is a fixed value regardless of the values of i and j.

9. The display device according to claim 1 or 5, wherein: The weighting coefficient based on the positional relationship between the light-emitting element included in the sub-pixel adjacent to the first sub-pixel and the first sub-pixel is proportional to the size of the light-emitting element included in the sub-pixel adjacent to the first sub-pixel.

10. The display device according to claim 6 or 7, wherein: The degradation promotion coefficient is a coefficient derived from the degradation amount of the light-emitting element.

11. The display device according to claim 1 or 5, wherein: The circuit portion further includes an adjacent pixel defining portion that defines adjacent sub-pixels including the second sub-pixel adjacent to the first sub-pixel.

Images