Display device and method for controlling display device

Abstract

To provide a display device with high display quality.SOLUTION: Each of a plurality of pixels (1) is determined whether or not it is a first high load pixel (12) having a load value equal to or greater than a first predetermined value, the plurality of pixels (1) are divided into a plurality of first virtual areas (13) according to a distribution of the first high load pixels (12), and a drive circuit (2) is controlled so that drive currents (11) supplied to a plurality of first pixels (14) belonging to one of the plurality of first virtual areas (13) are reduced by the same ratio.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a display device and a method for controlling the display device. [Background technology]

[0002] Patent document 1 discloses a display device that, when it is determined that there is a pixel for which degradation information indicating the degree of degradation of luminous efficiency has reached a predetermined value or above, controls a drive circuit so that the drive current supplied to the pixel is smaller than before the degradation information reached the predetermined value or above. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-019833 Summary of the Invention [Problem to be solved by the invention]

[0004] The display device disclosed in Patent Document 1 reduces the drive current on a pixel-by-pixel basis, resulting in a noticeable boundary between the display by pixels whose drive current is reduced and the display by pixels whose drive current is not reduced, resulting in low display quality. [Means for solving the problem]

[0005] A display device according to one embodiment of the present disclosure comprises a plurality of pixels, a drive circuit for supplying a drive current to each of the plurality of pixels, and a control unit for controlling the drive circuit in accordance with a video signal, wherein the control unit performs a first control in which it determines, for each of the plurality of pixels, whether it is a first high-load pixel having a load value indicating the load associated with pixel light emission that is equal to or greater than a first predetermined value, divides the plurality of pixels into a plurality of first virtual regions in accordance with the distribution of the first high-load pixels, and controls the drive circuit so as to reduce the drive current supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions by the same proportion or the same current value. [Effects of the Invention]

[0006] According to one aspect of the present disclosure, a display device with high display quality can be realized. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram illustrating a configuration of a display device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a diagram illustrating a configuration of a pixel. [Figure 3] 4 is a flowchart showing a first control according to the first embodiment of the present disclosure. [Figure 4] FIG. 10 is a diagram showing the relationship between a plurality of pixels and the percentage of the current value of the drive current supplied to the plurality of pixels at the end of step S2. [Figure 5] 3A and 3B are diagrams showing an image displayed by a display device based on a video signal. [Figure 6] FIG. 10 is a diagram showing the results of determining whether each of a plurality of pixels is a first high-load pixel. [Figure 7] FIG. 10 is a diagram showing the relationship between the distribution of first high-load pixels and a plurality of first virtual regions. [Figure 8] FIG. 2 is an explanatory diagram of a first pixel. [Figure 9]FIG. 10 is a diagram showing an example of the relationship between a plurality of first virtual regions and the percentage of the current value of the drive current supplied to each of a plurality of first pixels at the end of step S6. [Figure 10] FIG. 10 is a diagram showing another example of the relationship between the plurality of first virtual regions and the percentage of the current value of the drive current supplied to each of the plurality of first pixels at the end of step S6. [Figure 11] FIG. 10 is a diagram showing yet another example of the relationship between the plurality of first virtual regions and the percentage of the current value of the drive current supplied to each of the plurality of first pixels at the end of step S6. [Figure 12] 10 is a flowchart showing a second control according to the second embodiment of the present disclosure. [Figure 13] 10 is a diagram showing the relationship between the distribution of second high-load pixels and a plurality of second virtual regions. FIG. [Figure 14] FIG. 2 is an explanatory diagram of a second pixel. [Figure 15] FIG. 10 is a diagram showing an example of the relationship between a plurality of second virtual regions and the percentage of the current value of the drive current supplied to each of a plurality of second pixels at the end of step Se. DETAILED DESCRIPTION OF THE INVENTION

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes an embodiment of the present disclosure. For convenience of explanation, the same reference numerals are used to designate components having the same functions as those previously described, and the description thereof may not be repeated.

[0009] [Embodiment 1] 1 is a diagram showing the configuration of a display device 101 according to an embodiment of the present disclosure. The display device 101 includes a plurality of pixels 1, a drive circuit 2, and a control unit 3. The control unit 3 includes a signal acquisition unit 4, a timer unit 5, a determination unit 6, a region determination unit 7, and a current reduction unit 8.

[0010] The display device 101 includes a display panel 51. The display panel 51 has a plurality of pixels 1 and a gate driver 52. A plurality of data lines 53 are connected to a drive circuit 2. A plurality of gate lines 54 are connected to the gate driver 52. The region indicated by the reference numeral 9 is a display region 9 in which display is performed on the display device 101.

[0011] Fig. 2 is a diagram showing the configuration of a pixel 1. The pixel 1 has a light-emitting element 10, a selection transistor 55, a drive transistor 56, and a capacitance element 57. ELVDD is a high-level power supply line, and ELVSS is a low-level power supply line. Fig. 2 shows a drive current 11 for causing the light-emitting element 10 to emit light.

[0012] The potential of the power supply line ELVDD is higher than the potential of the power supply line ELVSS. The anode of the light-emitting element 10 is connected to the power supply line ELVDD via the drive transistor 56. The cathode of the light-emitting element 10 is connected to the power supply line ELVSS. The light-emitting element 10 may be a self-emitting element. Examples of the light-emitting element 10 include an OLED element and a QLED element. OLED is an abbreviation for Organic Light Emitting Diode. QLED is an abbreviation for Quantum Light Emitting Diode.

[0013] The gate of the selection transistor 55 is connected to the gate line 54 corresponding to the pixel 1. The gate of the drive transistor 56 is connected to the data line 53 corresponding to the pixel 1 via the selection transistor 55. The capacitance element 57 is connected to the gate of the drive transistor 56 and the power supply line ELVDD.

[0014] The control unit 3 acquires a video signal using the signal acquisition unit 4. The control unit 3 controls the drive circuit 2 and the gate driver 52 in accordance with the video signal. The drive circuit 2 is provided to supply a drive current 11 to each of the plurality of pixels 1 under the control of the control unit 3. The drive circuit 2 drives a data line 53 corresponding to each pixel 1. An example of the drive circuit 2 is a source driver. The gate driver 52 sequentially scans a plurality of gate lines 54 corresponding to the plurality of pixels 1.

[0015] During the image display period, in other words, during the period when the gradation voltage is written, the gate line 54 is activated by the gate driver 52. As a result, the selection transistor 55 connected to the activated gate line 54 is turned on.

[0016] In response to the gradation signal supplied to the drive circuit 2 by the control unit 3, the drive circuit 2 supplies a gradation voltage to the data line 53. As a result, the following operation occurs in the pixel 1 corresponding to the data line 53 to which the gradation voltage is supplied. A charge corresponding to the supplied gradation voltage is charged to the capacitive element 57. The gate driver 52 causes the gate line 54 to be in an inactive state, turning the selection transistor 55 off. The drive transistor 56 turns on, and a drive current 11 flows through the drive transistor 56 and to the light-emitting element 10 in response to the charge stored in the capacitive element 57. As a result, the light-emitting element 10 emits light at a target luminance.

[0017] The control unit 3 performs a first control. In the first control, the control unit 3 performs the following operations. The determination unit 6 determines, for each of the multiple pixels 1, whether or not the pixel 1 is a first high-load pixel 12, which means that a load value indicating the load associated with light emission of the pixel 1 is equal to or greater than a first predetermined value. The region determination unit 7 divides the multiple pixels 1 into multiple first virtual regions 13 according to the distribution of the first high-load pixels 12. The current reduction unit 8 controls the drive circuit 2 to reduce the drive currents 11 supplied to multiple first pixels 14 belonging to one of the multiple first virtual regions 13 by the same percentage. Alternatively, the current reduction unit 8 controls the drive circuit 2 to reduce the drive currents 11 supplied to multiple first pixels 14 belonging to one of the multiple first virtual regions 13 by the same current value.

[0018] The amount of reduction in the drive current 11 supplied to each of the multiple first pixels 14 may be determined based on any standard. For example, the drive current 11 supplied to each of the multiple first pixels 14 may be reduced to a level that prevents deterioration of the light-emitting element 10 of the first pixel 14 with the highest load value among the multiple first pixels 14 to a desired degree. Alternatively, for example, the average value of the load values ​​of the multiple first pixels 14 may be calculated, and the drive current 11 supplied to each of the multiple first pixels 14 may be reduced to a level that prevents deterioration of the light-emitting element 10 of the first pixel 14 with the average load value to a desired degree.

[0019] The display device 101 reduces the drive current 11 in units of one of the plurality of first virtual regions 13, in other words, in units of a plurality of first pixels 14. As a result, in the display device 101, the boundary between the display by the pixel 1 in which the drive current 11 is reduced and the display by the pixel 1 in which the drive current 11 is not reduced is less noticeable, and thus the display quality is high. Therefore, the display device 101 can realize a display device with high display quality.

[0020] The control unit 3 may determine the load value for each of the multiple pixels 1 in the following manner. The current value of the drive current 11 supplied to the pixel 1 after the timing at which the control unit 3 acquires the video signal using the signal acquisition unit 4 is set to I. The elapsed time from that timing is set to T. The load value is set to Q. At this time, the control unit 3 determines the load value by the determination unit 6 using Q=I×T. The timer unit 5 measures T. This makes it possible to easily determine the load value through simple calculation.

[0021] 3 is a flowchart showing the first control according to the first embodiment of the present disclosure. The first control includes steps S1 to S6. Hereinafter, for simplicity of explanation, I may be referred to as the current value I, T may be referred to as the elapsed time T, and Q may be referred to as the load value Q.

[0022] In step S1, the control unit 3 acquires a video signal using the signal acquisition unit 4. The control unit 3 starts measuring the elapsed time T from the timing of performing step S1 using the timing unit 5. In step S1, the elapsed time T is time 0.

[0023] In step S2, when the elapsed time T measured by the timer unit 5 reaches time Ta, in step S3, the control unit 3 determines the load value of each of the plurality of pixels 1 using the determination unit 6. In step S3, the determination unit 6 obtains the current value I for each of the plurality of pixels 1, obtains the elapsed time T from the timer unit 5, and determines the load value Q from Q=I×T.

[0024] The current value I of each of the plurality of pixels 1 may be a current value at any time between time 0 and time Ta, as long as the time is consistent among the current values ​​I of the plurality of pixels 1. One example of a technique for the determination unit 6 to acquire the current value I is to use a circuit that monitors the current value of the drive current 11 in each of the plurality of pixels 1.

[0025] FIG. 4 is a diagram showing the relationship between the plurality of pixels 1 and the percentage of the current value of the drive current 11 supplied to the plurality of pixels 1 at the end of step S2. In FIG. 4, a pixel group 58 shows a group of the plurality of pixels 1 as one block (one component). The percentage of the current value of the drive current 11 supplied to all of the plurality of pixels 1 belonging to the pixel group 58 is 100%. FIG. 5 is a diagram showing an image 59 displayed by the display device 101 based on a video signal. The image 59 is assumed to be an image displayed at high brightness in three regions 60.

[0026] In step S4, the control unit 3 uses the determination unit 6 to determine whether each of the multiple pixels 1 is a first high-load pixel 12, that is, a pixel having a load value Q equal to or greater than a first predetermined value. The control unit 3 may read information about the first predetermined value from a memory (not shown). The information about the first predetermined value may be provided to the control unit 3 from a server (not shown). Assume that a current of 50% of the maximum current value flows through one of the multiple pixels 1 for 50% (e.g., 90 seconds) or more of the period from time 0 to time Ta (e.g., 3 minutes). In this case, the first predetermined value may be, for example, a value such that Q = (maximum current value × 0.5) × T for one of the multiple pixels 1. The same applies to the other pixels 1. An example of the maximum current value is the current value required for the pixel 1 to display 255 gradations (white display).

[0027] Fig. 6 is a diagram showing the results of determining whether each of a plurality of pixels 1 is a first high-load pixel 12. Each of the many squares in Fig. 6 is a pixel 1, and among the many pixels 1, those with darker colors are first high-load pixels 12. Fig. 6 can also be said to show the distribution of the first high-load pixels 12. The distribution of the first high-load pixels 12 roughly corresponds to the positions of the three regions 60 where high-brightness display is performed.

[0028] In step S5, the control unit 3 causes the region determination unit 7 to divide the plurality of pixels 1 into a plurality of first virtual regions 13 in accordance with the distribution of the first high-load pixels 12.

[0029] 7 is a diagram showing the relationship between the distribution of first high-load pixels 12 and a plurality of first virtual regions 13. The size and shape of each of the plurality of first virtual regions 13 may be determined so as to aggregate as many first high-load pixels 12 as possible into as few first virtual regions 13 as possible.

[0030] The control unit 3 may use the region determination unit 7 to determine the size of the first virtual region 13 to match the size of the region where the first high-load pixels 12 are most densely located. This allows the size of the unit for reducing the drive current 11 to be adapted to the size of the region where the load value of the pixels 1 is generally high. This makes it possible to realize a control unit 3 that is highly suitable for selectively reducing the drive current 11 for the first high-load pixels 12, thereby realizing a display device 101 that is capable of high-brightness and high-quality display.

[0031] The control unit 3 may perform the following processing to identify the densest region, which is the region where a plurality of first high-load pixels 12 are most densely located, and the size of the densest region. Based on the distribution of a plurality of first high-load pixels 12, a region in which all pixels 1 are determined to be first high-load pixels 12 may be identified as the densest region. Multiple candidate sizes of the densest region may be prepared, and the size of the densest region may be identified as the size of the densest region that can include the largest number of pixels 1 in the actual densest region. At this time, each of these multiple candidate sizes of the densest region may be compared with the shape of the actual densest region.

[0032] The control unit 3 may use the region determination unit 7 to make the shape of the first virtual region 13 similar to the shape of the display region 9 of the display device 101. This allows the shape of the unit that reduces the drive current 11 to match the shape of the display region 9. This makes it easy to perform various position management operations for the multiple first virtual regions 13.

[0033] The control unit 3 may set the shape of the first virtual region 13 to a rectangle in the region determination unit 7. This makes it possible to easily perform various position management operations relating to the plurality of first virtual regions 13.

[0034] In step S6, the control unit 3 controls the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the first pixels 14 belonging to one of the first virtual regions 13 by the same percentage. Alternatively, in step S6, the control unit 3 controls the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the first pixels 14 belonging to one of the first virtual regions 13 by the same current value.

[0035] FIG. 8 is an explanatory diagram of a first pixel 14. FIG. 9 is a diagram showing an example of the relationship between the multiple first virtual regions 13 and the percentage of the current value of the drive current 11 supplied to each of the multiple first pixels 14 at the end of step S6. In FIG. 9, each of the multiple first virtual regions 13 is shown as a single block (one component), and the percentage is shown for each first virtual region 13. The percentage of the current value of the drive current 11 supplied to each of the multiple first pixels 14 belonging to the first virtual region 13 is classified into 100% and 85%. X (X is a number)% indicates that the current value of the drive current 11 supplied to each of the multiple first pixels 14 is X% relative to the current value at the end of step S2. It can be seen that the first control reduces the drive current 11 supplied to each of the multiple first pixels 14 belonging to one first virtual region 13 by the same percentage, specifically from 100% to 85% in percentage terms.

[0036] The control unit 3 may control the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the plurality of first pixels 14 belonging to each first virtual region 13 by the same percentage for each first virtual region 13. Alternatively, the control unit 3 may control the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the plurality of first pixels 14 belonging to each first virtual region 13 by the same current value for each first virtual region 13. With each of these methods, all of the plurality of pixels 1 can be subject to the first control, thereby realizing a display device 101 with high display quality across the entire display region 9.

[0037] In step S7, the control unit 3 determines whether or not the video signal has been switched after the first control (steps S1 to S6). For example, in step S7, the control unit 3 determines whether or not the channel has been switched.

[0038] If the determination result in step S7 is NO, that is, if the video signal is not switched, the process proceeds to step S1.

[0039] If the determination result in step S7 is YES, that is, if the video signal has switched, the process proceeds to step S8. In step S8, the control unit 3 ends the reduction control of the drive current 11 supplied to the plurality of first pixels 14 belonging to one of the plurality of first virtual regions 13. In step S8, the control unit 3 returns the percentage of the current value of the drive current 11 supplied to all of the plurality of pixels 1 to 100%. In this way, the control unit 3 may end the reduction control of the drive current 11 supplied to the plurality of first pixels 14 belonging to one of the plurality of first virtual regions 13 when the video signal is switched after the first control. This reduces the risk that the display based on the switched video signal will be displayed at inappropriate luminance due to the influence of the first control corresponding to the video signal before the switch, thereby realizing a display device 101 with high display quality.

[0040] Fig. 10 is a diagram showing another example of the relationship, at the end of step S6, between the multiple first virtual regions 13 and the percentage of the current value of the drive current 11 supplied to each of the multiple first pixels 14. Fig. 11 is a diagram showing yet another example of the relationship, at the end of step S6, between the multiple first virtual regions 13 and the percentage of the current value of the drive current 11 supplied to each of the multiple first pixels 14.

[0041] 10 and 11, the percentage of the current value of the driving current 11 supplied to each of the plurality of first pixels 14 belonging to the first virtual region 13 may be classified into three or more types. In the examples shown in FIGS. 10 and 11, the percentages are classified into 100%, 97%, 94%, 91%, 88%, and 85%.

[0042] Each of the plurality of pixels 1 may include a self-luminous element. In other words, each of the light-emitting elements 10 of the plurality of pixels 1 may be a self-luminous element.

[0043] If the video signal does not switch, the load values ​​may be obtained at regular intervals (time Ta), and the distribution of the control of the drive current 11 may be changed each time. For example, if the channel is not changed for three minutes after being changed, the drive current 11 for each region may be controlled according to the load values ​​of each region up to that point. If the channel is not changed thereafter, the load values ​​may be obtained every three minutes, and the distribution may be changed.

[0044] The first control can be interpreted as controlling the supply of less than 100% of drive current 11 to first pixel 14, instead of the usual 100%. If the drive current 11 supplied to first pixel 14 suddenly drops from 100%, there is a risk that the change in brightness in the image displayed based on the video signal will become noticeable. For this reason, the drive current 11 supplied to first pixel 14 may be reduced over a period of about 10 seconds.

[0045] [Embodiment 2] The control unit 3 may perform a second control if the video signal does not switch after the first control. In the second control, the control unit 3 performs the following operations. The determination unit 6 determines whether each of the plurality of pixels 1 is a second high-load pixel 15, which has a load value equal to or greater than a second predetermined value. The region determination unit 7 divides the plurality of pixels 1 into a plurality of second virtual regions 16 according to the distribution of the second high-load pixels 15. The current reduction unit 8 controls the drive circuit 2 to reduce the drive current 11 supplied to a plurality of second pixels 17 belonging to one of the plurality of second virtual regions 16 by the same percentage. Alternatively, the current reduction unit 8 controls the drive circuit 2 to reduce the drive current 11 supplied to a plurality of second pixels 17 belonging to one of the plurality of second virtual regions 16 by the same current value.

[0046] Fig. 12 is a flowchart showing the second control according to the second embodiment of the present disclosure. If the video signal is not switched after the first control, this corresponds to the case where the determination result in step S7 in Fig. 3 is NO. The second control includes steps Sa to Se.

[0047] In step Sa, when the elapsed time T measured by the timer unit 5 reaches time Tb, the control unit 3 causes the determination unit 6 to determine the load value of each of the plurality of pixels 1 in step Sb.

[0048] In step Sc, the control unit 3 causes the determination unit 6 to determine whether or not each of the plurality of pixels 1 is a second high-load pixel 15 whose load value is equal to or greater than a second predetermined value.

[0049] In step Sd, the control unit 3 causes the region determination unit 7 to divide the plurality of pixels 1 into a plurality of second virtual regions 16 in accordance with the distribution of the second high-load pixels 15.

[0050] In step Se, the control unit 3 controls the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the second pixels 17 belonging to one of the second virtual regions 16 by the same percentage. Alternatively, in step Se, the control unit 3 controls the drive circuit 2 so that the current reducing unit 8 reduces the drive currents 11 supplied to the second pixels 17 belonging to one of the second virtual regions 16 by the same current value.

[0051] FIG. 13 is a diagram showing the relationship between the distribution of second high-load pixels 15 and the plurality of second virtual regions 16. FIG. 14 is an explanatory diagram of a second pixel 17. FIG. 15 is a diagram showing an example of the relationship between the plurality of second virtual regions 16 and the percentage of the current value of the drive current 11 supplied to each of the plurality of second pixels 17 at the end of step Se. In the example shown in FIG. 15, the percentages are classified into 100%, 97%, 94%, 91%, 88%, 85%, 82%, and 79%. The lower limit of the percentage of the current value of the drive current 11 supplied to each of the plurality of second pixels 17 may be lower than the lower limit of the percentage of the current value of the drive current 11 supplied to each of the plurality of first pixels 14.

[0052] Steps Sa to Se can be interpreted as repeating steps S2 to S6, respectively. The correspondence between steps Sa to Se and steps S2 to S6 is as follows.

[0053] Second predetermined value - First predetermined value Second high-load pixel 15-First high-load pixel 12 Second virtual area 16-First virtual area 13 2nd pixel 17-1st pixel 14 The specific calculation methods, determination methods, region division methods, etc. in steps Sa to Se may be the same as or different from the specific calculation methods, determination methods, region division methods, etc. in steps S2 to S6. For example, the second predetermined value may be the same as the first predetermined value, or may be a value different from the first predetermined value.

[0054] In step Sf, the control unit 3 determines whether or not the video signal has been switched after the second control (steps Sa to Se). For example, in step Sf, the control unit 3 determines whether or not the channel has been switched.

[0055] If the determination result in step Sf is YES, that is, if the video signal has switched, the process proceeds to step Sg. In step Sg, the control unit 3 ends the reduction control of the drive current 11 supplied to the second pixels 17 belonging to one of the second virtual regions 16. In step Sg, the control unit 3 returns the percentage of the current value of the drive current 11 supplied to all of the pixels 1 to 100%.

[0056] The limit of the current reduction may be changed depending on the time. For example, if the channel is not switched for five minutes after switching, the current in each region may be controlled according to the load value of each region up to that point. If the channel is not switched for another five minutes (total of 10 minutes), the current in each region may be controlled according to the load value of each region up to that point.

[0057] The second control can be interpreted as controlling the supply of less than 100% of the drive current 11 to the second pixel 17, instead of the original 100%. If the drive current 11 supplied to the second pixel 17 suddenly drops from 100%, the change in brightness of the image displayed based on the video signal may become noticeable. For this reason, the drive current 11 supplied to the second pixel 17 may be reduced over a period of about 10 seconds.

[0058] [Additional Notes] A control method for a display device 101 according to the present disclosure is a control method for a display device 101 including a plurality of pixels 1 and a drive circuit 2 for supplying a drive current 11 to each of the plurality of pixels 1. The drive circuit 2 is controlled in response to a video signal. For each of the plurality of pixels 1, it is determined whether it is a first high-load pixel 12, which has a load value indicating the load associated with light emission of the pixel 1 equal to or greater than a first predetermined value. The plurality of pixels 1 are divided into a plurality of first virtual regions 13 in accordance with the distribution of the first high-load pixels 12. The drive circuit 2 is controlled so that the drive current 11 supplied to a plurality of first pixels 14 belonging to one of the plurality of first virtual regions 13 is reduced by the same rate or the same current value. This makes it possible to realize a control method for a display device 101 with high display quality.

[0059] 〔summary〕 A display device according to a first aspect of the present disclosure comprises a plurality of pixels, a drive circuit for supplying a drive current to each of the plurality of pixels, and a control unit for controlling the drive circuit in accordance with a video signal, wherein the control unit performs a first control in which it determines, for each of the plurality of pixels, whether it is a first high-load pixel having a load value indicating the load associated with pixel light emission that is equal to or greater than a first predetermined value, divides the plurality of pixels into a plurality of first virtual regions in accordance with the distribution of the first high-load pixels, and controls the drive circuit so as to reduce the drive current supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions by the same proportion or the same current value.

[0060] In the display device according to aspect 2 of the present disclosure, in aspect 1, when the current value of the drive current supplied to the pixel after the timing at which the control unit acquires the video signal is I, the elapsed time from that timing is T, and the load value is Q, the control unit calculates the load value as Q=I×T.

[0061] A display device according to aspect 3 of the present disclosure is in accordance with aspect 1 or 2, wherein the control unit determines the size of the first virtual region in accordance with the size of the region in which a plurality of first high-load pixels are most densely located.

[0062] A display device according to a fourth aspect of the present disclosure is in any one of the first to third aspects, wherein the control unit makes the shape of the first virtual region similar to the shape of the display region of the display device.

[0063] A display device according to a fifth aspect of the present disclosure is in any one of the first to fourth aspects, wherein the control unit sets the shape of the first virtual region to a rectangle.

[0064] In a display device according to aspect 6 of the present disclosure, in any one of aspects 1 to 5, the control unit controls the drive circuit so that, for each first virtual area, the drive current supplied to multiple first pixels belonging to the first virtual area is reduced by the same rate or the same current value.

[0065] In a display device according to aspect 7 of the present disclosure, in any one of aspects 1 to 6, the control unit terminates the reduction control of the driving current supplied to a plurality of first pixels belonging to one of the plurality of first virtual areas when the video signal is switched after the first control.

[0066] In a display device according to aspect 8 of the present disclosure, in any of aspects 1 to 7, the control unit performs a second control when the video signal does not switch after the first control, and in the second control, determines for each of the plurality of pixels whether it is a second high-load pixel whose load value is equal to or greater than a second predetermined value, divides the plurality of pixels into a plurality of second virtual regions according to the distribution of the second high-load pixels, and controls the drive circuit so as to reduce the drive current supplied to a plurality of second pixels belonging to one of the plurality of second virtual regions by the same proportion or the same current value.

[0067] A display device according to a ninth aspect of the present disclosure is the display device of any one of the first to eighth aspects, wherein each of the plurality of pixels includes a self-luminous element.

[0068] A control method for a display device according to aspect 10 of the present disclosure is a control method for a display device having a plurality of pixels and a drive circuit for supplying a drive current to each of the plurality of pixels, the control method controlling the drive circuit in response to a video signal, determining for each of the plurality of pixels whether it is a first high-load pixel having a load value indicating the load associated with pixel light emission that is equal to or greater than a first predetermined value, dividing the plurality of pixels into a plurality of first virtual regions in response to the distribution of the first high-load pixels, and controlling the drive circuit so as to reduce the drive current supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions by the same proportion or the same current value.

[0069] The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0070] 1 pixel 2. Drive circuit 3. Control Unit 4. Signal acquisition unit 5 Timing section 6 Judgment section 7 Area determination section 8 Current drop section 9 Display area 10 Light-emitting element 11 Drive current 12 First high load pixel 13 First Virtual Region 14 1st pixel 15 Second high load pixel 16 Second Virtual Region 17 Second pixel 101 Display device

Claims

1. A plurality of pixels; a drive circuit for supplying a drive current to each of the plurality of pixels; a control unit that controls the drive circuit in response to a video signal, The control unit performs a first control, In the first control, determining whether each of the plurality of pixels is a first high-load pixel, which is a pixel having a load value that indicates a load associated with light emission of the pixel equal to or greater than a first predetermined value; Dividing the plurality of pixels into a plurality of first virtual regions according to a distribution of the first high-load pixels; A display device that controls the drive circuit so that drive currents supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions are reduced by the same rate or the same current value.

2. When the current value of the drive current supplied to the pixel after the timing at which the control unit acquires the video signal is I, the elapsed time from the timing is T, and the load value is Q, The control unit determines the load value Q = I x T The display device according to claim 1 , wherein the display device is determined by the following formula:

3. The display device according to claim 1 , wherein the control unit determines the size of the first virtual region in accordance with the size of a region in which a plurality of first high-load pixels are most densely located.

4. The display device according to claim 1 , wherein the control unit makes the shape of the first virtual area similar to the shape of a display area of ​​the display device.

5. The display device according to claim 1 , wherein the control unit sets the first virtual area to have a rectangular shape.

6. 3. The display device according to claim 1, wherein the control unit controls the drive circuit so that, for each of the first virtual regions, the drive currents supplied to the first pixels belonging to the first virtual region are reduced by the same rate or the same current value.

7. 3. The display device according to claim 1, wherein the control unit terminates the reduction control of the drive current supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions when the video signal is switched after the first control.

8. the control unit performs a second control when the video signal is not switched after the first control; In the second control, determining whether or not each of the plurality of pixels is a second high-load pixel, that is, a pixel having a load value equal to or greater than a second predetermined value; Dividing the plurality of pixels into a plurality of second virtual regions according to a distribution of the second high-load pixels; 3. The display device according to claim 1, wherein the drive circuit is controlled so as to reduce the drive currents supplied to a plurality of second pixels belonging to one of the plurality of second virtual regions by the same rate or the same current value.

9. The display device according to claim 1 , wherein each of the plurality of pixels includes a self-luminous element.

10. A plurality of pixels; a drive circuit for supplying a drive current to each of the plurality of pixels, Controlling the drive circuit in response to a video signal; determining whether each of the plurality of pixels is a first high-load pixel, which is a pixel having a load value that indicates a load associated with light emission of the pixel equal to or greater than a first predetermined value; Dividing the plurality of pixels into a plurality of first virtual regions according to a distribution of the first high-load pixels; A control method for a display device, comprising controlling the drive circuit so as to reduce drive currents supplied to a plurality of first pixels belonging to one of the plurality of first virtual regions by the same rate or the same current value.

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