Signal processing device, signal processing method and display device

Abstract

This technology relates to a signal processing apparatus, a signal processing method, and a display device that can provide suitable functions according to an application. A signal processing apparatus is provided, equipped with: a signal processing unit that acquires at least one of the following: first information about the color of a video to be displayed on a panel; second information about the brightness of the screen of the panel; and third information measured as a physical quantity related to the panel; and adaptively controls the voltage used to drive the panel based on the acquired information, according to the load of the panel and the application. For example, this technology can be applied to a self-emissive display device.

Description

Technical Field

[0001] The present technology relates to a signal processing device, a signal processing method, and a display device, and more particularly, to a signal processing device, a signal processing method, and a display device capable of performing appropriate control according to an application. Background Art

[0002] In recent years, OLED display devices and other self-luminous display devices are becoming mainstream video display devices. For example, Patent Document 1 discloses a low power consumption technology as a technology for OLED display devices.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: U.S. Patent No. 10325552 Summary of the invention

[0006] Technical Problems to be Solved by the Invention

[0007] Incidentally, a display device (for example, a self-luminous display device) is required to perform appropriate control according to an application in which low power consumption is to be achieved.

[0008] In view of the above circumstances, the present technology has been made to perform appropriate control according to the application.

[0009] Solution to the problem

[0010] A signal processing device according to an aspect of the present technology includes a signal processing section that acquires at least one of first information about a color of a video to be displayed on a panel section, second information about a brightness of a screen of the panel section, and third information measured as a physical quantity related to the panel section, and performs adaptive control according to a load of the panel section and an applied voltage for driving the panel section based on the acquired information.

[0011] A signal processing method according to an aspect of the present technology includes: acquiring, by a signal processing device, at least one of first information about the color of a video to be displayed on a panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity about the panel unit; and based on the acquired information, performing adaptive control of a voltage according to a load and application of the panel unit. The voltage is used to drive the panel unit.

[0012] In a signal processing device and a signal processing method according to aspects of the present technology, at least one of first information about the color of a video to be displayed on a panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit is obtained. In addition, based on the obtained information, adaptive control of a voltage for driving the panel unit is performed according to a load and an application of the panel unit.

[0013] A display device according to one aspect of the present technology includes a panel unit and a signal processing unit. The signal processing unit acquires at least one of first information related to the color of a video to be displayed on the panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit, and performs adaptive control of a voltage corresponding to a load of the panel unit and an application of the panel unit based on the acquired information. The voltage is used to drive the panel unit.

[0014] In a display device according to aspects of the present technology, at least one of first information about the color of a video to be displayed on a panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit is acquired. In addition, based on the acquired information, adaptive control of a voltage for driving the panel unit is performed according to a load and application of the panel unit.

[0015] The signal processing device and the display device according to one aspect of the present technology may be independent devices or may be internal blocks included in the devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a diagram showing the relationship between the color component and the current value of each pixel.

[0017] Figure 2 A diagram showing an example of functions implemented by a timing controller.

[0018] Figure 3 It is a diagram showing an example of functions realized by setting a substrate.

[0019] Figure 4 : is a diagram showing an example of screen illuminance of a panel portion driven by a panel driving voltage.

[0020] Figure 5 A schematic diagram illustrating the relationship between power supply wiring and current supply in the panel section is shown.

[0021] Figure 6 is a block diagram showing a configuration example of an embodiment of a display device to which the present technology is applied.

[0022] Figure 7 is a block diagram showing an example of a detailed configuration of a signal processing section.

[0023] Figure 8 is a diagram showing an example of the color expression range of a video signal.

[0024] Fig. 9 is a diagram showing an example of gain control related to hue.

[0025] Fig.10 is a diagram showing an example of gain control related to saturation.

[0026] Fig.11 is a diagram showing an example of gain control related to brightness.

[0027] Fig.12 : is a diagram showing a first example of the relationship between the APL and the light emission illuminance of the panel unit.

[0028] Fig.13 : is a diagram showing a second example of the relationship between the APL and the light emission illuminance of the panel unit.

[0029] Fig.14 is a diagram showing a configuration example of one temperature sensor provided in a panel portion.

[0030] Fig.15 is a diagram showing a configuration example of a plurality of temperature sensors provided in a panel portion.

[0031] Fig.16 is a diagram showing a configuration example of a plurality of current sensors provided in a panel portion.

[0032] Fig.17 is a flow chart showing a panel drive voltage control process;

[0033] Fig.18 is a diagram showing a specific configuration example of a display device to which the present technology is applied.

[0034] Fig.19 is a block diagram showing another configuration example of the signal processing section. DETAILED DESCRIPTION

[0035] <1. Embodiments of the present technology>

[0036] (Low power consumption)

[0037] The technology of adjusting the reference gamma voltage and the driving voltage by measuring the average picture level (APL) and the maximum grayscale value of the image is known as a low power consumption technology for OLED display devices. In the case of using this type of technology, the determination process is performed by using only the measured APL and the maximum grayscale value. Therefore, the difference in the amperage of the light emitted by each pixel arranged on the display panel cannot be considered. This makes it impossible to grasp the load on the entire screen of the display panel.

[0038] The pixels arranged two-dimensionally on the display panel may each include four sub-pixels of white (W), red (R), green (G), and blue (B), or three sub-pixels of red (R), green (G), and blue (B). A system based on WRGB pixels is hereinafter referred to as a WRGB system, and a system based on RGB pixels is hereinafter referred to as an RGB system.

[0039] With respect to each pixel on a display panel based on the WRGB system, the current applied thereto varies according to the light emission levels of white (W), red (R), green (G), and blue (B). With respect to each pixel on a display panel based on the RGB system, the current applied thereto varies according to the light emission levels of red (R), green (G), and blue (B). Therefore, if information related to color is not considered, it is difficult to accurately grasp (predict) the load on the entire screen of the display panel.

[0040] Figure 1 The relationship between the color component and the current value of each pixel is shown. Figure 1 In the graph, the horizontal axis represents the color of the sub-pixel (white, red, green, and blue) and the color (yellow, cyan, magenta) generated when two sub-pixels of different colors emit light, and the vertical axis represents the panel drive current value. In each pixel, yellow (Y) is generated when the R and G sub-pixels emit light, magenta (M) is generated when the R and B sub-pixels emit light, and cyan (C) is generated when the G and B sub-pixels emit light.

[0041] exist Figure 1 In the example, the current value of each color component is represented by a vertically extending bar for each color component. Figure 1 As can be seen from the bar graph in , the current value changes from one color component to another. Specifically, in the case of yellow (Y), magenta (M), and cyan (C), the current value increases significantly because two sub-pixels of different colors are made to emit light.

[0042] Furthermore, a timing controller (T-CON) is provided in the display panel of the OLED display device. In the case where the timing controller is used for function realization, there is no differential delay between the voltage drive and the video signal because a frame memory is provided. As a result, a delay corresponding to the transient response of the power supply is always generated. This leaves the problem that real-time-based processing cannot be performed.

[0043] More specifically, Figure 2 1 shows a configuration in which the functions are realized by the timing controller 13 provided in the panel section 14. Figure 2 In the configuration described in , the timing controller 13 controls the panel driving voltage through the power supply section 12. However, the video signal processed by the signal processing section 11 is stored in the frame memory 22. Therefore, it is difficult to control the voltage driving and the video signal at the same time.

[0044] Figure 3 1 shows a configuration in which the functions are realized by the signal processing section 11 configured as, for example, a video SoC provided on a substrate. Figure 3 In the configuration described in , the signal processing section 11 controls the panel driving voltage through the power supply section 12. Therefore, the timing controller 13 has an additional capacity equivalent to the frame buffer provided by the frame memory 22.

[0045] (Increase in illumination)

[0046] In order to provide increased illumination in a stable manner, OLED display devices need to increase the panel drive voltage. For example, if the voltage value is low in the case of trying to increase the illumination of a video such as a window pattern, the illumination of the screen center of the display panel does not increase. This leads to the problem of illumination varying from one screen position to another.

[0047] Figure 4 FIG. 2 shows an example of screen illuminance of the panel section 14 driven by the panel driving voltage. Figure 4 , the horizontal axis corresponds to the height position of the screen of the panel section 14, and the substantially central portion of the horizontal axis corresponds to the center of the screen in the height direction. In addition, the horizontal axis indicates that the distance from the top of the screen decreases as the distance from the leftmost end of the horizontal axis decreases, and the distance from the bottom of the screen decreases as the distance from the rightmost end of the horizontal axis decreases. The vertical axis represents the illuminance, and indicates that the illuminance increases as the distance from the uppermost end of the vertical axis decreases, and decreases as the distance from the lowermost end of the vertical axis decreases.

[0048] exist Figure 4, bold lines L11 to L13 represent screen illuminance depending on the panel drive voltage. Bold line L11 indicates the case where the panel drive voltage is V11, bold line L12 indicates the case where the panel drive voltage is V12, and bold line L13 indicates the case where the panel drive voltage is V13. However, these panel drive voltages are in a relationship indicated by the relational expression V11>V12>V13.

[0049] Incidentally, if, for example, when trying to increase the illuminance of a video such as a window pattern, as indicated by a thick line L12 or a thick line L13, the voltage value of the panel driving voltage is low (the voltage values ​​of V12 and V13 are lower than the voltage value of V11), the illuminance of the center of the screen of the panel section 14 does not increase. As a result, the illuminance varies from one screen position to another. For example, in the case where the panel driving voltage indicated by the thick line L12 is V12, the center of the screen is predetermined to be lower in illuminance by several percent than a position on the screen near the top or bottom of the screen (for example, at Figure 4 in the case of the disease, about 7 percent lower).

[0050] The above-mentioned illuminance variation is caused by the difference in current supply between the illuminated portion and the non-illuminated portion of the screen of the panel section 14, although it depends on the power supply wiring in the panel section 14. In order to increase the illuminance, it is necessary to increase the panel drive voltage (for example, Figure 4 As shown by the bold line L11 in FIG. 1 , the panel driving voltage is increased to V11).

[0051] Figure 5 The relationship between the power supply wiring and the current supply in the panel section 14 is schematically shown. Figure 5 In the case of the video of the window pattern (white area) shown in A, the relationship between the power supply wiring and the current supply in the panel unit 14 is as follows Figure 5 As shown in B. It should be noted that Figure 5 The dotted rectangle in B corresponds to Figure 5 The window pattern shown in A.

[0052] More specifically, through Figure 5 The U-turn arrow in B indicates the flow of the current I supplied through the power supply wiring 31 in the panel section 14. Since the current is supplied from the area outside the window pattern, the voltage drop at the top and bottom of the screen is smaller than the voltage drop at the center of the screen. However, the current does not flow well at the center of the screen. This prevents the illuminance from increasing. Therefore, in order to increase the illuminance, it is necessary to increase the panel drive voltage.

[0053] (Temperature rise suppression)

[0054] In addition, in OLED display devices, when the panel driving voltage is simply increased to increase the illumination, the power consumption is inadvertently increased. Therefore, when the panel driving voltage continues to increase, the temperature of the display panel rises, so that the high load state continues. This leads to reliability problems such as screen burn-in, for example.

[0055] The present technology proposes a method for solving the above-mentioned problems. Embodiments of the present technology will now be described with reference to the drawings.

[0056] (Device Configuration)

[0057] Figure 6 A configuration example of an embodiment of a display device to which the present technology is applied is shown.

[0058] The display device 1 is a self-luminous display device, such as an OLED display device having an OLED panel. The display device 1 is configured as, for example, a television receiver.

[0059] refer to Figure 6 The display device 1 includes a signal input unit 110 , a signal processing unit 111 , a power supply unit 112 , a panel driving unit 113 and a panel unit 114 .

[0060] The signal input portion 110 includes, for example, a tuner connected to an antenna, a communication module connectable to the Internet or other communication networks, or an input interface conforming to a predetermined standard.

[0061] The signal input section 110 supplies video signals of various types of content to the signal processing section 111. The various types of content include, for example, broadcast content transmitted through terrestrial broadcasting or satellite broadcasting, communication content streamed through the Internet or other communication networks, and recorded content recorded in a recording medium such as an optical disk or a semiconductor memory or recorded in a recorder.

[0062] The signal processing section 111 performs video signal processing on the video signal of the content supplied from the signal input section 110, and supplies the resulting processed video signal to the panel driving section 113. In addition, through the power supply section 112, the signal processing section 111 controls a panel driving voltage for causing the panel driving section 113 to drive the panel section 114.

[0063] The panel driving section 113 drives the panel section 114 based on the video signal supplied from the signal processing section 111 and the panel driving voltage controlled by the signal processing section 111. Furthermore, the panel driving section 113 measures the surface temperature and amperage of the panel section 114 and supplies the measurement results to the signal processing section 111.

[0064] The panel section 114 includes a display panel such as an OLED panel. Based on the drive from the panel driving section 113, the panel section 114 displays a video according to a video signal of various types of content.

[0065] An OLED panel is a display panel in which pixels having OLED elements as self-luminous elements are arranged two-dimensionally. An organic light emitting diode (OLED) is a light emitting element having a structure in which an organic light emitting material is sandwiched between a cathode and an anode, and is included in pixels (display pixels) arranged two-dimensionally on an OLED panel.

[0066] On an OLED panel, each pixel (display pixel) includes four sub-pixels of white (W), red (R), green (G), and blue (B) in the case of a WRGB system, or three sub-pixels of red (R), green (G), and blue (B) in the case of an RGB system.

[0067] It should be noted that for ease of explanation, Figure 6 However, the display device may additionally include, for example, other circuits and devices such as a sound signal processing circuit for processing a sound signal and a speaker for outputting sound based on the sound signal.

[0068] Figure 7 Show Figure 6 An example of the detailed configuration of the signal processing section 111 is described in FIG.

[0069] Reference Figure 7 The signal processing section 111 includes a W conversion section 131 , a hue detection section 132 , a saturation detection section 133 , a brightness detection section 134 , an APL detection section 135 , and a voltage control section 136 .

[0070] In the signal processing section 111, the video signal from the signal input section 110 is supplied to the W conversion section 131 and the APL detection section 135. Furthermore, the video signal is supplied to the panel driving section 113.

[0071] The W conversion section 131 performs white conversion processing on the input video signal, and outputs the white signal to the hue detection section 132 , the saturation detection section 133 , and the brightness detection section 134 .

[0072] The hue detection section 132 performs hue detection processing on the video signal supplied from the W conversion section 131, and supplies the resulting processed hue information to the voltage control section 136. The hue detection processing is performed to detect the hue (H) color space (HSV color space) component of the video signal.

[0073] The saturation detection section 133 performs saturation detection processing on the video signal supplied from the W conversion section 131, and supplies the resulting processed saturation information to the voltage control section 136. The saturation detection processing is performed to detect saturation (S) in a color space (HSV color space) component of the video signal.

[0074] The brightness detection section 134 performs brightness detection processing on the video signal supplied from the W conversion section 131, and supplies the processed brightness information to the voltage control section 136. The brightness detection processing is performed to detect brightness (V (value)) in the color space (HSV color space) component of the video signal.

[0075] The APL detection section 135 performs an APL detection process on the video signal input thereto, and supplies the resulting processed APL information to the voltage control section 136. The APL detection process is performed to detect an average pixel level (APL) based on the video signal. The average pixel level (APL) is a value used as an index indicating the brightness of the entire screen of the panel section 114.

[0076] The voltage control unit 136 receives hue information from the hue detection unit 132, saturation information from the saturation detection unit 133, brightness information from the brightness detection unit 134, and APL information from the APL detection unit 135. In addition, the voltage control unit 136 receives temperature information and ampere information from the panel driving unit 113.

[0077] The voltage control part 136 performs adaptive control of a panel driving voltage for driving the panel part 114 according to load and application based on at least one of hue information, saturation information, brightness information, APL information, temperature information, and amperage information.

[0078] In the above example, the power supply section 112 variably controls the panel driving voltage under the control of the voltage control section 136 and supplies the panel driving voltage to the panel driving section 113. Thus, the panel section 114 is driven based on the applied panel driving voltage.

[0079] For example, the voltage control unit 136 controls the HSV color space based on the hue information, saturation information, and brightness information. Figures 8 to 11 The control of the HSV color space is described in detail. In addition, the voltage control unit 136 controls the illumination curve based on the APL information. Fig.12 and Fig.13 The control of the illumination curve is described in detail. In addition, the voltage control section 136 controls the panel driving voltage based on the temperature information and the amperage information.

[0080] refer to Figure 7The panel driving unit 113 includes a panel temperature measuring unit 151 and a panel current measuring unit 152 .

[0081] The panel temperature measuring section 151 supplies temperature information to the voltage control section 136. The temperature information indicates the surface temperature of the panel section 114, which is measured by, for example, a temperature sensor provided in the panel section 114. Fig.14 and Fig.15 An example of the configuration of the temperature sensor is described.

[0082] The panel current measuring part 152 provides amperage information to the voltage control part 136. The amperage information indicates the amperage of the panel driving voltage applied to the panel portion 114 and measured, for example, by a current sensor provided in the panel portion 114. Fig.16 An example of a configuration of a current sensor is described.

[0083] (HSV control)

[0084] Figure 8 An example of the color expression range of a video signal is shown.

[0085] exist Figure 8 In the HSV color space, the color expression range of the video signal is expressed in the HSV color space. The HSV color space is a color space with three components, namely, hue (H), saturation (S), and brightness (V (value)). In this case, hue represents the type of color, saturation represents the vividness of the color, and brightness represents the brightness of the color.

[0086] refer to Figure 8 , the HSV color space is indicated by a cylinder 51. In the cylinder 51 representing the HSV color space, its azimuthal direction represents hue H, its radial direction represents saturation S, and its axial direction represents brightness V. Figure 8 A portion of the HSV color space from which a cross section of the hue H is cut is depicted.

[0087] More specifically, a column 51 representing the HSV color space corresponds to a color range that can be represented by four sub-pixels of white (W), red (R), green (G), and blue (B) included in each pixel based on the WRGB system or three sub-pixels of red (R), green (G), and blue (B) included in each pixel based on the RGB system.

[0088] In the display device 1, the current applied to each pixel on the panel section 114 changes according to the light emission level in the WRGB system or the RGB system. Therefore, in order to accurately grasp the load on the panel section 114, it is necessary to consider the color information.

[0089] Fig. 9An example of gain control related to hue H is shown. Fig. 9 , the horizontal axis represents hue H, and the vertical axis represents hue-dependent gain.

[0090] The hue H represented by the horizontal axis is represented by a value in the range of 0° to 360°. More specifically, a hue of 0° represents red, a hue of 60° represents yellow, a hue of 120° represents green, a hue of 180° represents cyan, a hue of 240° represents blue, and a hue of 300° represents magenta.

[0091] When the hue-dependent gain is controlled, the weight of the current load is determined for each hue H according to the characteristics of the OLED element of each pixel. In addition, for complementary colors such as yellow (Y), cyan (C), and magenta (M), two sub-pixels of different colors among R, G, and B are made to emit light in each pixel. In this case, the load generated is higher than the load in the case of making a single sub-pixel of R, G, or B emit light. This makes it necessary to adjust the weight.

[0092] Reference Fig. 9 , the hue-dependent gain depending on the hue H is represented by a thick line L21 in the form of a triangle wave. For complementary colors, ie, yellow (Y), cyan (C), and magenta (M), the hue-dependent gain is multiplied by 1.0, and its weight is changed to be different from that of other colors.

[0093] The voltage control section 136 adaptively controls the panel driving voltage by adjusting the weight using a gain related to the hue based on the hue information provided from the hue detection section 132. This makes it possible to adjust the weight to suppress the load in the case where two sub-pixels of different colors among R, G, and B emit light, for example, by a video signal having complementary colors.

[0094] Fig.10 An example of gain control related to saturation S is shown. Fig.10 , the horizontal axis represents the saturation S, and the vertical axis represents the saturation-related gain.

[0095] The saturation S indicated by the horizontal axis is represented by a value in the range of 0 to 1 (0% to 100%). More specifically, the saturation S changes with the distance from the central axis (achromatic axis) of the cylinder 51 indicating the HSV color space, that is, the saturation S is maintained at 0 in the case of achromatic colors, and increases with increasing distance from the achromatic axis. For example, in the case of a pure color, the saturation S reaches a maximum value.

[0096] When controlling the gain associated with saturation, the weight is controlled according to the lightness or darkness of the color. In each pixel of the WRGB system, the subpixel of W has a higher luminous efficiency than the other subpixels of R, G, and B. Therefore, when the color is darker, the weight needs to be considered more significantly.

[0097] Reference Fig.10 , the saturation-dependent gain depending on the saturation S is indicated by the thick line L31, which is a straight line sloping upward to the right. When the saturation S increases, the gain also increases with a constant gradient. This makes it possible to change the weight in the saturation direction. The saturation-dependent gain can be called the high saturation square gain because it increases with increasing saturation.

[0098] The voltage control section 136 adaptively controls the panel driving voltage by using the saturation-related gain adjustment weight based on the saturation information provided from the saturation detection section 133. This makes it possible to adjust the weight more significantly when the color is darker in the case of the WRGB system, thereby suppressing the load.

[0099] By the way, in the case of the RGB system, all sub-pixels of R, G, and B in each pixel are made to emit light to express white (W). Therefore, as the color becomes lighter, the weight needs to be considered more significantly. In this case, the gain related to saturation that depends on the saturation S is represented by a straight line that slopes downward to the right, so that when the saturation S decreases, the gain increases at a constant gradient. Thus, in the case of the RGB method, when the color becomes lighter, the weight can be adjusted more significantly, and the load can be suppressed.

[0100] Fig.11 An example of gain control related to brightness V is shown. Fig.11 , the horizontal axis represents brightness V, and the vertical axis represents brightness-related gain.

[0101] Brightness V represented by the horizontal axis is represented by a value ranging from 0 to 1 (0% to 100%). More specifically, brightness increases in the height direction of the cylinder 51 representing the HSV color space, and the color becomes brighter when the brightness increases, and becomes darker when the brightness decreases.

[0102] When controlling the brightness-related gain, the weight is controlled according to the signal level of the video signal. More specifically, when the light emission level of each pixel is simply increased, the load becomes higher accordingly. Therefore, the brightness-related gain is controlled based on a scheme related to such load increase.

[0103] Reference Fig.11, the brightness-dependent gain depending on the brightness V is represented by the thick line L41 which slopes upward to a straight line to the right. When the brightness V increases, the gain also increases with a constant gradient. This makes it possible to change the weight in the direction of the brightness. The brightness-dependent gain can be called a high brightness-dependent gain because it increases as the illumination increases.

[0104] The voltage control section 136 adaptively controls the panel driving voltage by adjusting the weight using a brightness-dependent gain based on the brightness information supplied from the brightness detection section 134. This makes it possible to adjust the weight to suppress the load when the light emission level of the pixel is high.

[0105] As described above, the voltage control unit 136 controls the gain (hue-related gain, saturation-related gain, brightness-related gain) based on information (hue information, saturation information, brightness information) related to each component (hue, saturation, brightness) of the video signal represented in the color space (HSV color space). Thus, the weight is adjusted according to the load on each component (hue, saturation, and brightness) of the video signal represented in the color space (HSV color space).

[0106] (APL lighting control)

[0107] The OLED panel of the OLED display device is characterized in that the illumination decreases with the brightness of the entire screen of the OLED panel. The reason why the OLED panel has such a characteristic is that the pixels including the OLED elements are arranged two-dimensionally on the OLED panel, and the amperage of the entire screen increases with the increase of the light-emitting area of ​​the OLED panel. Therefore, the OLED panel is able to emit bright light when the light-emitting area is small. However, when the light-emitting area increases, the total light emission decreases.

[0108] In order to consider the above characteristics of the OLED display device, the display device 1 needs to predict the load on the panel portion 114 according to the average pixel level (APL) representing the brightness of the entire screen of the panel portion 114 and perform weighting based on the light emitting area of ​​the panel portion 114.

[0109] Fig.12 and Fig.13 An example of the relationship between the average pixel level (APL) of the panel section 114 and the light emission illuminance is shown. Fig.12 and Fig.13 , the horizontal axis represents the average pixel level (APL), and the vertical axis represents the illuminance. The average pixel level (APL) represented by the horizontal axis is represented by a value within a range of 0% to 100%.

[0110] refer to Fig.12, the thick line L51 indicates the peak brightness control based on the average pixel level (APL) and performed on the sub-pixels of R, G, and B. Fig.12 As shown by the thick line L51 as a curve in FIG. 5 , the light emission illuminance of the R, G, and B sub-pixels gradually decreases as the value of the average pixel level (APL) increases.

[0111] refer to Fig.13 , the thick line L61 indicates the peak brightness control based on the average pixel level (APL) and performed on the sub-pixel of W. Fig.13 As indicated by the bold line L61 in , the light emission illuminance of the W sub-pixel gradually decreases as the value of the average pixel level (APL) increases.

[0112] In addition, if Fig.12 The thick line L51 in Fig.13 From the comparison between the thick line L61 in FIG. 1 , it can be seen that the W sub-pixel has a higher luminous efficiency than the R, G and B sub-pixels.

[0113] The voltage control section 136 adaptively controls the panel driving voltage by controlling an illuminance curve (e.g., a thick line L51 or a thick line L61) based on an average pixel level (APL) derived from the APL information provided from the APL detection section 135 and performing weighting (adjusting the weight according to the load applied to the panel section 114) according to the light emitting area of ​​the panel section 114. As a result, in the display device 1 configured as an OLED display device, driving can be performed based on the characteristics of the panel section 114 configured as an OLED panel.

[0114] (Measurement of board surface temperature)

[0115] The display device 1 can provide improved accuracy not only by allowing the signal processing section 111 to perform signal processing for predicting the load on the video but also by allowing, for example, a temperature sensor to measure the surface temperature of the panel section 114 .

[0116] Fig.14 FIG. 1 shows a configuration example of a temperature sensor provided in the panel portion 114. Fig.14 , the temperature sensor 171 is arranged at a position corresponding to a substantially central portion of the screen of the panel portion 114 so as to measure the surface temperature of the panel portion 114. It should be noted that the temperature sensor 171 does not always have to be arranged at a position corresponding to a substantially central portion of the screen. The temperature sensor 171 may alternatively be arranged at a different position.

[0117] Fig.15 FIG. 1 shows an example of a configuration of a plurality of temperature sensors provided in the panel portion 114. Fig.15In the example shown, the area of ​​the entire screen of the panel portion 114 is divided into 4×9 areas of equal size and arranged in the vertical and horizontal directions, and the temperature sensor 171 is arranged in each divided area. It should be noted that for convenience of explanation, dotted lines representing the boundaries of the divided areas are depicted on the screen of the panel portion 114.

[0118] exist Fig.15 , numbers corresponding to the positions of the segmented areas A in the vertical and horizontal directions are shown. For example, the segmented area in the upper left on the screen of the panel section 114 is represented as segmented area A11, and the segmented area in the lower right is represented as segmented area Aij. In addition, numbers corresponding to the positions of the temperature sensors 171 in the vertical and horizontal directions are shown. For example, the temperature sensor in the upper left is represented as temperature sensor 171-11, and the temperature sensor in the lower right is represented as temperature sensor 171-ij.

[0119] In the above numbering system, i is a number indicating a position in the vertical direction, and j is a number indicating a position in the horizontal direction. Fig.15 An example in which the screen of the panel portion 114 is divided into 4×9 division areas is described, but the screen of the panel portion 114 may be divided into i×j (i and j are integers of 1 or more) division areas A. Thus, the number of division areas A where the temperature sensor 171 is arranged is determined as needed.

[0120] Reference Fig.15 , the temperature sensor 171-11 measures the surface temperature of the divided area A11 of the screen of the panel unit 114. Here, although redundant explanation is avoided, the temperature sensor 171-ij also measures the surface temperature of the divided area Aij corresponding to the configuration position of the temperature sensor 171-ij in the same manner as the temperature sensor 171-11.

[0121] exist Fig.14 The temperature sensor 171 described in Fig.15 The temperature sensors 171-11 to 171-ij described in Figure 7 In the case where the plurality of temperature sensors 171 - 11 to 171 - ij are provided in the panel portion 114 , the surface temperature can be measured more accurately than in the case where one temperature sensor 171 is provided in the panel portion 114 .

[0122] pass Fig.14 The temperature sensor described in the Fig.15 Each surface temperature measured by the temperature sensors 171-11 to 171-ij described in the above is supplied to the voltage control section 136 as temperature information. The voltage control section 136 is based on the temperature information obtained from Fig.14 The temperature information provided by the temperature sensor 171 or other temperature sensors shown in FIG. 1 controls the panel driving voltage.

[0123] (Panel Amperage Measurement)

[0124] Furthermore, the display device 1 can provide improved accuracy not only by allowing the signal processing section 111 to perform signal processing for predicting the load on the video, but also by allowing, for example, a current sensor to measure, for example, amperage depending on the panel driving voltage applied to the panel section 114 .

[0125] In the case where one current sensor is provided in the panel portion 114 , the current sensor may be provided on a power source substrate for generating a panel driving voltage or on the panel portion 114 itself.

[0126] In the case where a plurality of current sensors are provided in the panel portion 114 , when the current sensor is disposed in a driving transistor for driving a pixel including an OLED element, the load on each pixel can be measured with improved accuracy. Fig.16 An example of the configuration of a plurality of current sensors provided in the panel portion 114 is shown.

[0127] Fig.16 1 is an enlarged diagram showing a circuit configuration of a sub-pixel included in one of the pixels two-dimensionally arranged on the panel section 114. Fig.16 , the sub-pixel includes an OLED element 191, a driving transistor 192, and a holding capacitor element 193. The driving transistor 192 configured as, for example, a thin film transistor (TFT) is connected between the OLED element 191 and a driving circuit (not shown). When a current Ids depending on a voltage supplied from the driving circuit flows from the driving transistor 192 to the OLED element 191, the OLED element 191 emits light at a light emission illuminance based on the current Ids.

[0128] Reference Fig.16 The current sensor 181 is connected between the driving transistor 192 and the driving circuit. The current sensor 181 measures the current Ids supplied to the OLED element 191.

[0129] Fig.16 The current sensor 181 shown corresponds to Figure 7 The panel current measuring section 152 is shown. Fig.16 The current measured by the current sensor 181 depicted in FIG. 1 is supplied to the voltage control unit 136 as ampere information. The voltage control unit 136 is based on, for example, Fig.16 The current sensor 181 depicted in FIG. 1 supplies amperage information to control the panel drive voltage.

[0130] (Adaptive Voltage Control)

[0131] Fig.17 2 is a flowchart showing the panel driving voltage control process executed by the signal processing section 111 .

[0132] In step S11 , the voltage control section 136 acquires at least one of hue information, saturation information, brightness information, APL information, temperature information, and amperage information.

[0133] In the above example, the hue information, saturation information, and brightness information are related to the color of the video to be displayed on the panel section 114. The APL information is related to the brightness of the screen of the panel section 114. The temperature information and the amperage information are measured as physical quantities related to the panel section 114.

[0134] In step S12 , based on the acquired information, the voltage control section 136 performs adaptive control of the panel driving voltage according to the load and application.

[0135] The above-mentioned applications include usage purposes such as increasing the brightness of the screen of the panel section 114 , suppressing a temperature increase of the panel section 114 , and reducing power consumption of the panel section 114 .

[0136] For example, in the case of increasing the illumination, when a state in which, for example, the APL value is smaller than the reference value and the light-emitting area of ​​the panel unit 114 is relatively small and a state in which the video signal has a color component whose value is preferably smaller than the reference value and the signal level of the video signal is higher than the reference value is detected, the voltage control unit 136 performs control to increase the panel driving voltage based on the acquired information.

[0137] Furthermore, in the case where the load increases with the increase in the panel driving voltage, for example, the voltage control section 136 can perform control such that feedback is applied while measuring the surface temperature and the amperage until the load becomes constant and the value of the panel driving voltage is restored to a predetermined state.

[0138] For example, in a case where a temperature rise is to be suppressed, when a state in which, for example, the APL value is greater than a reference value and the luminous area is relatively large and a state in which the video signal has a color component whose value is preferably greater than the reference value and the signal level of the video signal is higher than the reference value is detected, the voltage control unit 136 performs control to reduce the panel driving voltage based on the acquired information.

[0139] Furthermore, in the case where the load decreases with a decrease in the panel driving voltage, for example, the voltage control section 136 can perform control to apply feedback while measuring the surface temperature and amperage until the load becomes constant and restore the value of the panel driving voltage to a predetermined state.

[0140] In the manner described above, when measuring the load, the voltage control section 136 can adaptively control the panel driving voltage based on the acquired information in order to achieve purposes such as increasing illumination, suppressing temperature rise, and reducing power consumption.

[0141] It should be noted that in the case where the rear surface of the panel portion 114 includes a heat dissipation material that is cheaper than conventional materials for the purpose of reducing costs, for example, when a high-load video signal and a temperature rise are detected, the signal processing portion 111 is able to reduce the load and suppress the temperature rise by performing control to reduce the panel driving voltage.

[0142] (Specific configuration example)

[0143] Fig.18 A specific configuration example of a display device to which the present technology is applied is shown.

[0144] Figure 6 The display device 1 shown in FIG. 1 may include a setting substrate 211 , a power substrate 212 , and a T-CON / OLED panel 213 .

[0145] The base plate 211 includes a video SoC 231, a power MCU 232, and an I / F unit 233. The video SoC 231 performs video signal processing on an input video signal. The video SoC 231 is a Figure 6 The functions of the signal processing unit 111 are described in the signal processing device.

[0146] More specifically, the video SoC 231 performs HSV control and APL illumination control, and controls the panel driving voltage by using, for example, a PWM signal and an analog signal depending on such HSV control and APL illumination control. Fig.18 In the example shown in FIG, the PWM signal is used as the panel drive voltage control signal (depending on Fig.18 The signal of the rectangular wave inside the frame F11 in FIG. 1 is output from the video SoC 231 to the power supply substrate 212 through the I / F unit 233.

[0147] The power MCU 232 issues an instruction for turning the power on or off based on a signal from a general purpose input / output (GPIO). Fig.18 The signal of the pulse wave inside the frame F12 in the frame) is output from the power supply MCU 232 to the power supply substrate 212 through the I / F part 233.

[0148] The power substrate 212 corresponds to Figure 6 The power supply section 112 shown in FIG. The power supply substrate 212 includes an LPF 251 , a current sensor 252 , an I / F section 253 , an I / F section 254 , and an I / F section 255 .

[0149] The power supply substrate 212 is configured so that, when a PWM signal is input from the setting substrate 211 to the I / F section 253, the LPF 251 restores the input signal to an analog signal ( Fig.18 It should be noted that in the case where an analog signal is input from the setting substrate 211, it is only necessary to use the analog signal without change.

[0150] Furthermore, the power supply substrate 212 is configured so that the panel driving voltage (in Fig.18 The panel driving voltage is applied to the OLED panel of the T-CON / OLED panel 213 through the I / F section 255. In this case, the panel driving voltage may drive the entire screen of the OLED panel or drive each of predetermined areas, such as an area corresponding to a power wiring. The panel driving voltage is a voltage (e.g., an EVDD voltage) for driving the OLED panel.

[0151] The current sensor 252 measures the amperage of the panel driving voltage applied to the OLED panel of the T-CON / OLED panel 213. The current sensor 252 feeds back the measured amperage as amperage information to the video SoC 231 disposed on the substrate 211. It should be noted that the current sensor 252 may alternatively be arranged on the OLED panel of the T-CON / OLED panel 213, for example.

[0152] It should be noted that the power substrate 212 turns on and off the power based on the power control signal from the setting substrate 211. In addition, the power substrate 212 outputs T-CON power to the timing controller (T-CON) of the T-CON / OLED panel 213 through the I / F section 254.

[0153] T-CON / OLED panel 213 corresponds to Figure 6 The panel driving section 113 and the panel section 114 are shown. The T-CON / OLED panel 213 includes a temperature sensor 271 , an I / F section 272 , and an I / F section 273 .

[0154] The OLED panel of the T-CON / OLED panel 213 performs driving based on the panel driving voltage applied from the power substrate 212 through the I / F portion 273. The timing controller (T-CON) of the T-CON / OLED panel 213 operates based on the T-CON power input from the power substrate 212 through the I / F portion 272.

[0155] The temperature sensor 271 measures the surface temperature of the OLED panel and feeds back the measured surface temperature to the video SoC 231 disposed on the substrate 211 as temperature information.

[0156] The video SoC 231 disposed on the substrate 211 controls the panel driving voltage based on at least one of the amperage information fed back from the current sensor 252 or the temperature information fed back from the temperature sensor 271 .

[0157] (Another configuration example)

[0158] Fig.19 Show Figure 6 Another configuration example of the signal processing section 111 described in .

[0159] Fig.19 Detailed configuration of the signal processing unit 111 of the RGB system is shown. Fig.19 The configuration shown in Figure 7 The configuration shown in Figure 7 Shows the detailed configuration of the WRGB system. Fig.19 The signal processing unit 111 shown in FIG. Figure 7 The same constituent elements as those of the signal processing section 111 shown in FIG. 1 are denoted by the same reference numerals and will not be redundantly described.

[0160] Fig.19 The signal processing unit 111 shown in FIG. Figure 7 The signal processing section 111 shown in FIG. 1 is different in that the former does not include a W conversion section 131 that performs W conversion (e.g., white color conversion (WCT)). More specifically, in the case of an RGB system, since each pixel in the RGB system does not include a sub-pixel of W, white conversion is not required. Therefore, in Fig.19 In the signal processing section 111 shown, the video signal from the signal input section 110 is directly input not only to the APL detection section 135 but also to the hue detection section 132 , the saturation detection section 133 , and the brightness detection section 134 .

[0161] The hue detection section 132 performs hue detection processing on the input video signal. The saturation detection section 133 performs saturation detection processing on the input video signal. The brightness detection section 134 performs brightness detection processing on the input video signal.

[0162] <2. Modifications>

[0163] The above description assumes that the signal processing section 111 is a constituent element of the display apparatus 1. However, the signal processing section 111 may alternatively be used as an independent device and may be regarded as a signal processing device.

[0164] The foregoing description shows a case where the display device 1 is a television receiver. However, the display device 1 is not limited to a television receiver and may alternatively be a device such as a display. Examples of displays include medical monitors, broadcast monitors, displays for digital signage, and the like.

[0165] In addition, the display device 1 can be used as a display unit of a personal computer (PC), a tablet terminal, a smart phone, a mobile phone, a video game console, a head-mounted display, a vehicle-mounted device (such as a car navigation system or a rear seat monitor), or a wearable device such as a watch type or glasses type.

[0166] In the above description, an OLED display device having an OLED panel is exemplified as the display device 1. However, the present technology is also applicable to other display devices such as a self-luminous display device having a self-luminous display panel.

[0167] The above description shows a case where the pixels arranged two-dimensionally on the panel section 114 (display panel) each include four sub-pixels of white (W), red (R), green (G), and blue (B). However, the colors of the sub-pixels are not limited to the above colors. For example, instead of a white (W) sub-pixel, each pixel may include a sub-pixel of another color having a high luminosity factor comparable to the luminosity factor of white (W).

[0168] In addition, the HSV color space is an example of a color space in which colors are quantitatively expressed. Alternatively, a different color space may be used.

[0169] It should be noted that the term "OLED" can be understood as "organic EL (electroluminescence)". For example, it can be said that an OLED display device is an organic EL display device. In addition, since a video includes a plurality of image frames, the term "video" can be read as "image".

[0170] It should also be noted that the embodiments of the present technology are not limited to the above-described embodiments, and various modifications may be made to the embodiments without departing from the spirit and scope of the present technology.

[0171] Furthermore, the advantages described in this specification are merely illustrative and not restrictive. The present technology may additionally provide advantages other than those described in this specification.

[0172] It should be noted that the present technology can also adopt the following configurations. (1)

[0174] A signal processing device, comprising:

[0175] Signal Processing Unit:

[0176] acquiring at least one of first information about the color of a video to be displayed on the panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit, and

[0177] Based on the acquired information, adaptive control of a voltage is performed according to a load and application of the panel unit, the voltage being used to drive the panel unit. (2)

[0179] The signal processing device according to (1) above, wherein

[0180] When measuring the load on the panel section, the signal processing section performs adaptive control of the voltage according to the application based on the acquired information. (3)

[0182] The signal processing device according to (1) or (2) above, wherein

[0183] The first information includes information on components of a color space. (4)

[0185] The signal processing device according to (3) above, wherein

[0186] The color space includes the HSV color space, and

[0187] The components of a color space include hue, saturation, and brightness. (5)

[0189] The signal processing device according to (4) above, wherein

[0190] The signal processing unit adjusts the weight according to the load of the panel unit by controlling the gain associated with the hue, saturation, or brightness. (6)

[0192] The signal processing device according to any one of (1) to (5) above, wherein

[0193] The second information includes information on an average pixel level indicating brightness of the entire screen of the panel section. (7)

[0195] The signal processing device according to (6) above, wherein

[0196] The signal processing section adjusts the weight according to the load on the panel section by controlling the illuminance curve based on the average pixel level. (8)

[0198] The signal processing device according to any one of (1) to (7) above, wherein

[0199] The third information includes a physical quantity indicating a surface temperature of the panel portion or an ampere based on a voltage applied to the panel portion. (9)

[0201] The signal processing device according to (8) above, wherein

[0202] The signal processing section performs feedback control of the load of the panel section based on the measurement result of the surface temperature or the amperage. (10)

[0204] The signal processing device according to (8) or (9) above, wherein

[0205] The panel portion is provided with one or more temperature sensors for measuring the surface temperature. (11)

[0207] The signal processing device according to (8) or (9) above, wherein

[0208] The panel portion or power substrate for generating voltage is provided with one or more current sensors for measuring amperage. (12)

[0210] The signal processing device according to any one of (1) to (11) above, wherein

[0211] Applications include those for achieving increase in brightness of a screen of a panel portion, suppression of a temperature rise in the panel portion, or reduction in power consumption of the panel portion. (13)

[0213] The signal processing device according to (12) above, wherein

[0214] In the case where the illumination of the screen of the panel unit is to be increased, the signal processing unit increases the voltage when the following conditions are detected: a value of an average pixel level included in the second information and indicating the brightness of the entire screen of the panel unit is less than a reference value, and wherein a light-emitting area of ​​the panel unit is relatively small; and a video signal has a color component which is information included in the first information and related to a component of a color space, a value of the color component is less than a reference value, and wherein a signal level of the video signal is higher than a reference value. (14)

[0216] The signal processing device according to (13) above, wherein

[0217] When the voltage increases and the load on the panel unit increases, the signal processing unit performs control to restore the voltage to a predetermined state by performing feedback control based on a measurement result of a physical quantity, wherein the physical quantity is included in the third information and indicates at least a surface temperature of the panel unit or an ampere based on the voltage applied to the panel unit. (15)

[0219] The signal processing device according to (12) above, wherein

[0220] While suppressing the temperature rise of the panel unit, the signal processing unit reduces the voltage when the following states are detected: a value of an average pixel level included in the second information and indicating the brightness of the entire screen of the panel unit is greater than a reference value, and wherein a light-emitting area of ​​the panel unit is relatively large; and a video signal has a color component which is information included in the first information and related to a component of a color space, a value of the color component is greater than a reference value, and wherein a signal level of the video signal is higher than a reference value. (16)

[0222] The signal processing device according to (15) above, wherein

[0223] When the voltage is reduced and the load on the panel unit is reduced, the signal processing unit performs control to restore the voltage to a predetermined state by performing feedback control based on a measurement result of a physical quantity, wherein the physical quantity is included in the third information and indicates at least a surface temperature of the panel unit or an ampere based on the voltage applied to the panel unit. (17)

[0225] The signal processing device according to any one of (1) to (16) above, wherein

[0226] The panel section includes an OLED panel. (18)

[0228] A signal processing method, comprising:

[0229] Through the signal processing device,

[0230] acquiring at least one of first information related to the color of a video to be displayed on the panel unit, second information related to the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit; and

[0231] Based on the acquired information, adaptive control of a voltage is performed according to a load and application of the panel unit, the voltage being used to drive the panel unit. (19)

[0233] A display device, comprising:

[0234] a signal processing unit that processes the video signal; and

[0235] A panel portion displays a video based on a video signal, wherein

[0236] Signal processing unit;

[0237] acquiring at least one of first information on the color of a video to be displayed on the relevant panel section, second information on the brightness of a screen of the relevant panel section, and third information measured as a physical quantity related to the panel section, and

[0238] Based on the acquired information, adaptive control of a voltage is performed according to a load and application of the panel unit, the voltage being used to drive the panel unit. (20)

[0240] The display device according to (19) above, wherein the panel portion includes an OLED panel.

[0241] [Reference Numbers List]

[0242] 1: Display device

[0243] 110: Signal input unit

[0244] 111: Signal Processing Department

[0245] 112: Power supply department

[0246] 113: Panel driver

[0247] 114: Panel

[0248] 131: W Conversion Department

[0249] 132: Hue detection unit

[0250] 133: Saturation detection unit

[0251] 134: Brightness detection unit

[0252] 135: APL Testing Department

[0253] 136: Voltage control unit

[0254] 151: Panel temperature measuring unit 152: Panel current measuring unit 171: Temperature sensor

[0255] 181: Current sensor

[0256] 191: OLED components

[0257] 192: Driving transistor

[0258] 193: Holding capacitor element

[0259] 211: Setting up the substrate

[0260] 212: Power substrate 213: T-CON / OLED panel 231: Video SoC 232: Power MCU 233: I / F unit

[0261] 251: LPF

[0262] 252: Current sensor

[0263] 253, 254, 255: I / F section

[0264] 271: Temperature sensor

[0265] 272, 273: I / F section.

Claims

1. A signal processing device, comprising: Signal Processing Unit: acquiring at least one of first information about the color of a video to be displayed on a panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit, and Based on the acquired information, adaptive control of a voltage for driving the panel section is performed according to a load and an application of the panel section, wherein, the signal processing section performs the adaptive control of the voltage according to the application while measuring the load of the panel section based on the acquired information, Among them, the application includes suppression of temperature increase in the panel portion.

2. The signal processing device according to claim 1, wherein: The first information includes information about components of a color space.

3. The signal processing device according to claim 2, wherein: The color space includes an HSV color space, and The components of the color space include hue, saturation, and brightness.

4. The signal processing device according to claim 3, wherein: The signal processing unit adjusts the weight according to the load of the panel unit by controlling a gain associated with the hue, the saturation, or the brightness.

5. The signal processing device according to claim 1, wherein: The second information includes information on an average pixel level indicating brightness of the entire screen of the panel section.

6. The signal processing device according to claim 5, wherein: The signal processing unit adjusts the weight according to the load of the panel unit by controlling the illuminance curve based on the average pixel level.

7. The signal processing device according to claim 1, wherein: The third information includes a physical quantity indicating at least a surface temperature of the panel portion or an ampere based on the voltage applied to the panel portion.

8. The signal processing device according to claim 7, wherein: The signal processing section performs feedback control of the load of the panel section based on a measurement result of the surface temperature or the amperage.

9. The signal processing device according to claim 7, wherein: The panel portion is provided with one or more temperature sensors for measuring the surface temperature.

10. The signal processing device according to claim 7, wherein: The panel portion or power substrate for generating a voltage is provided with one or more current sensors for measuring the amperage.

11. The signal processing device according to claim 1, wherein: The application further includes an application for realizing an increase in the illuminance of the screen of the panel section or a reduction in the power consumption of the panel section.

12. The signal processing device according to claim 11, wherein: acquiring the first information about the color of the video to be displayed on the panel section and the second information about the brightness of the screen of the panel section, In the case where the illumination of the screen of the panel unit is to be increased, the signal processing unit increases the voltage upon detecting the following states: a value of an average pixel level included in the second information and indicating the brightness of the entire screen of the panel unit is less than a reference value, and wherein the light-emitting area of ​​the panel unit is small; and a video signal has a color component as information included in the first information and associated with a component of a color space, a value of the color component is less than a reference value, and wherein a signal level of the video signal is higher than a reference value, the signal level of the video signal indicating the light-emitting level of each pixel.

13. The signal processing device according to claim 12, wherein: In the case where the voltage increases and the load on the panel unit increases, the signal processing unit performs control to restore the voltage to a predetermined state by performing feedback control based on the measurement result of the physical quantity included in the third information and indicating at least the surface temperature of the panel unit or based on the ampere of the voltage applied to the panel unit.

14. The signal processing device according to claim 11, wherein: acquiring the first information about the color of the video to be displayed on the panel section and the second information about the brightness of the screen of the panel section, While suppressing the temperature rise of the panel unit, the signal processing unit reduces the voltage when the following states are detected: a value of an average pixel level included in the second information and indicating the brightness of the entire screen of the panel unit is greater than a reference value, and wherein the light-emitting area of ​​the panel unit is large; and a video signal has a color component as information included in the first information and related to a component of a color space, a value of the color component is greater than a reference value, and wherein a signal level of the video signal is higher than a reference value, and the signal level of the video signal indicates the light-emitting level of each pixel.

15. The signal processing device according to claim 14, wherein: When the voltage decreases and the load on the panel unit decreases, the signal processing unit performs control to restore the voltage to a predetermined state by performing feedback control based on the measurement result of the physical quantity, wherein the physical quantity is included in the third information and indicates at least the surface temperature of the panel unit or is based on the ampere of the voltage applied to the panel unit.

16. The signal processing device according to claim 1, wherein: The panel part includes an OLED panel.

17. A signal processing method, comprising: By the signal processing device: acquiring at least one of first information about a color of a video to be displayed on a panel unit, second information about brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit; and When the voltage for driving the panel section is adaptively controlled according to the load and application of the panel section based on the acquired information, the adaptive control of the voltage is performed according to the application while measuring the load of the panel section, The application includes suppression of a temperature increase in the panel portion.

18. A display device, comprising: A signal processing unit, which processes video signals; as well as A panel unit displays a video based on the video signal, wherein: The signal processing unit: acquiring at least one of first information about the color of a video to be displayed on the panel unit, second information about the brightness of a screen of the panel unit, and third information measured as a physical quantity related to the panel unit, and When the voltage for driving the panel section is adaptively controlled according to the load and application of the panel section based on the acquired information, the adaptive control of the voltage is performed according to the application while measuring the load of the panel section, The application includes suppression of a temperature increase in the panel portion.

19. The display device according to claim 18, wherein: The panel part includes an OLED panel.

Images