WO2021220854A1 - 信号処理装置、信号処理方法、及び表示装置 - Google Patents

信号処理装置、信号処理方法、及び表示装置 Download PDF

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Publication number
WO2021220854A1
WO2021220854A1 PCT/JP2021/015796 JP2021015796W WO2021220854A1 WO 2021220854 A1 WO2021220854 A1 WO 2021220854A1 JP 2021015796 W JP2021015796 W JP 2021015796W WO 2021220854 A1 WO2021220854 A1 WO 2021220854A1
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WIPO (PCT)
Prior art keywords
signal processing
brightness
gain
display panel
signal
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/015796
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English (en)
French (fr)
Japanese (ja)
Inventor
真生 全
俊介 菊地
大輔 三木
和宏 抜山
一隆 小林
泰 小沼
和希 内田
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Sony Group Corp
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Sony Group Corp
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Filing date
Publication date
Application filed by Sony Group Corp filed Critical Sony Group Corp
Priority to US17/919,631 priority Critical patent/US11790843B2/en
Priority to DE112021002594.5T priority patent/DE112021002594T5/de
Priority to JP2022517640A priority patent/JPWO2021220854A1/ja
Priority to CN202411552674.2A priority patent/CN119360768A/zh
Priority to CN202180030645.8A priority patent/CN115485762B/zh
Publication of WO2021220854A1 publication Critical patent/WO2021220854A1/ja
Anticipated expiration legal-status Critical
Priority to US18/238,606 priority patent/US12131692B2/en
Priority to US18/889,518 priority patent/US12505792B2/en
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/048—Preventing or counteracting the effects of ageing using evaluation of the usage time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • 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 suppressing the influence of element deterioration of a display panel.
  • Patent Document 1 discloses a technique for increasing the brightness of a display panel as a technique for a display device such as a self-luminous display device.
  • This technology was made in view of such a situation, and makes it possible to suppress the influence of element deterioration of the display panel.
  • the signal processing device measures and accumulates the amount of increase in the load on the display panel due to the implementation of the high brightness when the video signal is increased in brightness from the low brightness display signal to the high brightness display signal.
  • the cumulative load increase amount is acquired, and based on the acquired cumulative load increase amount, a first gain for improving the brightness of the video signal is adaptively applied according to the degree of influence of element deterioration of the display panel. It is a signal processing device provided with a signal processing unit for controlling.
  • the signal processing device when the signal processing device increases the brightness of the video signal from the low-luminance display signal to the high-luminance display signal, the amount of increase in the load on the display panel due to the high-luminance implementation.
  • the first gain for improving the brightness of the video signal is set to the degree of influence of element deterioration of the display panel. It is a signal processing method that is adaptively controlled according to the above.
  • the load on the display panel is increased by implementing the increase in brightness.
  • the cumulative load increase amount obtained by measuring the amount is acquired, and based on the acquired cumulative load increase amount, the first gain for improving the brightness of the video signal is the element deterioration of the display panel. It is adaptively controlled according to the degree of influence.
  • the display device on one aspect of the present technology includes a panel unit having a display panel and a signal processing unit that processes a video signal, and the signal processing unit displays the video signal from a low-luminance display signal to a high-luminance display.
  • the signal processing unit displays the video signal from a low-luminance display signal to a high-luminance display.
  • the amount of increase in the load of the display panel due to the implementation of the increase in brightness is measured to acquire the accumulated cumulative load increase amount, and the video signal is based on the acquired cumulative load increase amount.
  • This is a display device that adaptively controls the first gain for improving the brightness of the display panel according to the degree of influence of element deterioration of the display panel.
  • the display device on one side of the present technology when the video signal is increased in brightness from the low-luminance display signal to the high-intensity display signal, the amount of increase in the load on the display panel due to the implementation of the high-luminance display is measured and accumulated.
  • the cumulative load increase amount is acquired, and based on the acquired cumulative load increase amount, the first gain for improving the brightness of the video signal is adapted according to the degree of influence of the element deterioration of the display panel. Is controlled.
  • the signal processing device and display device on one side of the present technology may be independent devices or internal blocks constituting one device.
  • FIG. 1 shows an example of high-luminance processing to which such high-luminance technology is applied.
  • FIG. 1A shows the relationship between the input video signal and the integrated value by thick lines L11 and thick lines L12 on the same time axis.
  • FIG. 1 shows the relationship between the gain multiplied by the input video signal and the integrated value by thick lines L13 and L14 on the same time axis.
  • FIG. 1C shows the relationship between the output video signal obtained by multiplying the input video signal and the gain and the integrated value by thick lines L15 and L16 on the same time axis.
  • the display panel of the display device has a problem that burn-in occurs due to element deterioration.
  • This technology proposes a method for solving long-term display panel reliability problems such as burn-in due to element deterioration, which is a problem when increasing the brightness of the display panel as described above.
  • FIG. 2 shows a configuration example of an embodiment of a display device to which the present technology is applied.
  • the display device 1 is a self-luminous display device such as an OLED display device having an OLED display panel.
  • the display device 1 is configured as a television receiver or the like.
  • the display device 1 is composed of a signal input unit 110, a signal processing unit 111, a panel drive unit 112, and a panel unit 113.
  • the signal input unit 110 is composed of a tuner connected to an antenna, a communication module that can be connected to a communication network such as the Internet, an input interface conforming to a predetermined standard, and the like.
  • the signal input unit 110 records broadcast content transmitted by terrestrial broadcasting, satellite broadcasting, etc., communication content streamed via a communication network such as the Internet, or a recording medium such as an optical disk or semiconductor memory, a recorder, or the like. Video signals of various contents such as recorded contents are supplied to the signal processing unit 111.
  • the signal processing unit 111 performs video signal processing on the video signal of the content supplied from the signal input unit 110, and supplies the video signal obtained as a result to the panel drive unit 112.
  • high-luminance processing for changing the video signal from a low-luminance display signal (low-luminance signal) to a high-luminance display signal (high-luminance signal) is performed.
  • the panel drive unit 112 drives the panel unit 113 based on the video signal supplied from the signal processing unit 111.
  • the panel unit 113 includes a display panel such as an OLED display panel.
  • the panel unit 113 displays images according to the image signals of various contents according to the drive from the panel drive unit 112.
  • the OLED display panel is a display panel in which pixels including an OLED element as a self-luminous element are arranged two-dimensionally.
  • An OLED Organic Light Emitting Diode
  • An 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 constitutes pixels (display pixels) arranged two-dimensionally on an OLED display panel. ing.
  • each pixel is composed of four sub-pixels of white (W), red (R), green (G), and blue (B) in the case of the RGB system, and is of the RGB system. In the case, it is composed of three sub-pixels of red (R), green (G), and blue (B).
  • the minimum configuration unit is shown for simplification of explanation, but a sound signal processing circuit that processes a sound signal, a speaker that outputs a sound corresponding to the sound signal, and the like are used. Other circuits, devices, etc. may be included.
  • FIG. 3 shows a detailed configuration example of the signal processing unit 111 of FIG.
  • the signal processing unit 111 includes a brightness improvement reference gain calculation unit 131, a load increase amount measurement / accumulation unit 132, a non-volatile memory 133, a brightness improvement gain calculation unit 134, an addition unit 135, and a multiplication unit 136.
  • the input video signal from the signal input unit 110 is supplied to the luminance improvement reference gain calculation unit 131, the load increase amount measurement / accumulation unit 132, and the multiplication unit 136, respectively.
  • the luminance improvement reference gain calculation unit 131 performs the luminance improvement reference gain calculation process based on the video signal input therein, and supplies the luminance improvement reference gain obtained as a result to the luminance improvement gain calculation unit 134.
  • the luminance improvement reference gain is a reference gain used when calculating the luminance improvement gain.
  • the load increase amount measurement / accumulation unit 132 performs cumulative addition value calculation processing and cumulative processing based on the video signal input therein and the brightness improvement magnification, and calculates the cumulative value of the cumulative load increase amount obtained as a result. It is supplied to the brightness improvement gain calculation unit 134. As the luminance improvement magnification, the luminance improvement magnification according to the gain multiplied by the input video signal is fed back and input.
  • a non-volatile memory 133 such as an EEPROM (Electrically Erasable Programmable Read Only Memory) is provided in order to store the data of the cumulative value when the cumulative processing is performed.
  • EEPROM Electrically Erasable Programmable Read Only Memory
  • the load increase amount measurement / cumulative unit 132 among the measurement result of the surface temperature of the display panel supplied from the panel drive unit 112 and the measurement result of the current flowing through the display panel when the cumulative addition value calculation process is performed. , At least one of the measurement results can be added.
  • the brightness improvement reference gain calculation unit 134 is supplied with the brightness improvement reference gain from the brightness improvement reference gain calculation unit 131 and the cumulative value of the cumulative load increase amount from the load increase amount measurement / accumulation unit 132.
  • the brightness improvement gain calculation unit 134 performs the brightness improvement gain calculation process based on the brightness improvement reference gain and the cumulative value of the cumulative load increase amount, and supplies the brightness improvement gain obtained as a result to the addition unit 135.
  • the cumulative load increase amount linked gain a value obtained by multiplying the brightness improvement reference gain by the gain linked to the cumulative value of the cumulative load increase amount (hereinafter referred to as the cumulative load increase amount linked gain) is calculated as the brightness improvement gain. ..
  • the details of the luminance improvement gain calculation process will be described later with reference to FIG.
  • the addition unit 135 adds the brightness improvement gain from the brightness improvement gain calculation unit 134 and the normal gain, and supplies the resulting high brightness gain to the multiplication unit 136.
  • the normal gain is a gain that is multiplied by the input video signal, and is a gain for converting the input video signal into a high-luminance display signal.
  • a gain that can always increase the brightness is set to the extent that there is no problem in element deterioration that occurs during the usage period of the display panel.
  • This additional luminance improvement gain is adaptively controlled according to the measurement result of the cumulative load increase amount, the measurement result of the surface temperature of the display panel, and the measurement result of the current load of the display panel.
  • the multiplication unit 136 multiplies the input video signal by the high-luminance gain from the addition unit 135, and supplies the output video signal obtained as a result to the panel drive unit 112.
  • the panel drive unit 112 may be provided with a panel temperature measurement unit 151 and a panel current measurement unit 152.
  • the panel temperature measuring unit 151 is composed of a temperature sensor or the like provided on the panel unit 113.
  • the panel temperature measuring unit 151 measures the surface temperature of the display panel, and supplies the measurement result to the load increase amount measuring / accumulating unit 132 of the signal processing unit 111.
  • a configuration example of the temperature sensor will be described later with reference to FIGS. 7 and 8.
  • the panel current measuring unit 152 is composed of a current sensor or the like provided on the panel unit 113.
  • the panel current measuring unit 152 measures the current applied to the display panel, and supplies the measurement result to the load increase amount measuring / accumulating unit 132 of the signal processing unit 111.
  • the configuration of the signal processing unit 111 shown in FIG. 3 is an example, and the minimum configuration unit thereof can be a configuration that does not use the measurement results from the panel temperature measurement unit 151 and the panel current measurement unit 152. .. Even with such a configuration, it is possible to control the additional brightness improvement gain so that the load increase amount of the display panel due to the implementation of the brightness increase is not accumulated and the element deterioration becomes too large. Further, the accuracy can be further improved by using the measurement results from the panel temperature measuring unit 151 and the panel current measuring unit 152.
  • the calculation method may be limited, such as calculating a fixed gain or calculating a gain that fluctuates according to some information.
  • the brightness enhancement process using the brightness enhancement technology shown in FIG. 1 is applied.
  • FIG. 4 shows an example of a load increase amount measurement / load increase amount measurement method by the cumulative unit 132.
  • the load increase amount measurement / accumulation unit 132 includes a cumulative addition value calculation unit 141 and a cumulative processing unit 142.
  • the input video signal and the luminance improvement magnification are input to the cumulative addition value calculation unit 141.
  • the cumulative addition value calculation unit 141 calculates the addition value when the cumulative processing is performed according to the load increased by the brightness enhancement processing.
  • the cumulative addition value can be correlated with the element deterioration amount, or the cumulative addition value can be correlated with the brightness improvement time.
  • the thick line L21 shows the relationship when the horizontal axis is the load increase amount and the vertical axis is the cumulative addition value and has a correlation with the element deterioration amount.
  • the thick line L21 has a relationship in which the cumulative added value increases with a predetermined inclination as the load increase amount increases, and the added value in a high load state becomes large. That is, in this example, in order to correlate with the amount of device deterioration, a larger addition value is calculated according to a higher load.
  • the relationship with the brightness improvement time when the horizontal axis is the load increase amount and the vertical axis is the cumulative addition value is shown by the thick line L31.
  • the thick line L31 has a relationship in which the cumulative addition value becomes a constant value as the load increase amount increases, and the addition value becomes constant regardless of the load. That is, in this example, a constant addition value is calculated in order to measure the time during which the brightness enhancement processing is performed.
  • the cumulative processing unit 142 calculates the cumulative value of the load increase amount (cumulative load increase amount) by adding the addition value calculated by the cumulative addition value calculation process for each image frame. Further, the cumulative processing unit 142 writes or reads the cumulative value data to the non-volatile memory 133 such as EEPROM in order to hold the cumulative value when the power of the display device 1 is turned off.
  • the cumulative processing unit 142 executes these cumulative processes for each predetermined area on the screen of the display panel and calculates the cumulative value for each predetermined area, so that the high-luminance processing is the same location (area). ) Can be determined how much it was carried out. Then, the brightness improvement gain calculation unit 134 can control the additional brightness improvement gain according to the cumulative load increase amount.
  • the area on the screen of the display panel can be, for example, an area of the entire screen divided into a plurality of areas having predetermined sizes in the vertical direction and the horizontal direction. Specifically, it can be an area corresponding to the division area A of FIG. 8 to be described later.
  • the load prediction by signal processing does not include information on deterioration characteristics that change with temperature. Therefore, the load of the image is predicted by signal processing, or the actual surface temperature of the display panel is measured by a temperature sensor or the like, and the temperature information obtained there is obtained for each predetermined area on the screen of the display panel. The accuracy can be further improved by adding to the cumulative addition value of.
  • Only one temperature sensor may be attached to the panel portion 113 as supplementary information for load prediction by signal processing, or a panel for the purpose of improving the accuracy of supplementary information or directly measuring without load prediction by signal processing. A plurality of them may be attached to the portion 113.
  • FIG. 7 shows a configuration example of one temperature sensor provided on the panel unit 113.
  • the temperature sensor 171 is attached at a position corresponding to a substantially central portion of the screen of the display panel, and measures the surface temperature of the display panel.
  • the temperature sensor 171 is not limited to the position corresponding to the substantially central portion of the screen of the display panel, and may be attached to another position.
  • FIG. 8 shows a configuration example of a plurality of temperature sensors provided on the panel unit 113.
  • FIG. 8 shows an example in which the entire screen area of the display panel is divided into 4 ⁇ 9 areas having the same size in the vertical direction and the horizontal direction, and the temperature sensor 171 is attached to each divided area. ing. For convenience of explanation, a broken line indicating the boundary of the divided area is described on the screen of the display panel.
  • the numbers corresponding to the vertical direction and the horizontal direction of the divided area A are described in the upper left divided area A11 and the lower right divided area Aij on the screen of the display panel. Further, the numbers corresponding to the vertical direction and the horizontal direction of the temperature sensor 171 are described in the temperature sensor 171-11 on the upper left and the temperature sensor 171-ij on the lower right.
  • i represents a vertical number and j represents a horizontal number. That is, in FIG. 8, an example in which the screen of the display panel is divided into 4 ⁇ 9 divided areas is shown, but it is possible to divide the screen into i ⁇ j (integer of i, j: 1 or more) divided area A.
  • the number of division regions A to which the temperature sensor 171 is attached is arbitrary.
  • the temperature sensor 171-11 measures the surface temperature of the divided region A11 in the entire screen of the display panel. Since it will be repeated, the description thereof will be omitted, but the surface temperature of the divided region Aij corresponding to the mounting position is similarly measured for the temperature sensors 171-ij other than the temperature sensors 171-11.
  • the temperature sensor 171 in FIG. 7 and the temperature sensors 171-11 to 171-ij in FIG. 8 correspond to the panel temperature measurement unit 151 in FIG.
  • the surface temperature of the display panel can be measured more accurately than when one temperature sensor 171 is attached.
  • the current sensor may be provided on the display panel itself, or may be provided on a power supply board that generates a voltage for driving the display panel.
  • the brightness improvement gain calculation unit 134 reduces the brightness improvement gain when the brightness improvement processing is performed for a long period of time and the cumulative load increase amount is high, thereby affecting the influence of element deterioration due to the brightness improvement processing during the usage period. It can be suppressed.
  • the brightness improvement gain calculation unit 134 controls to lower the brightness improvement gain when the cumulative value of the load increase amount exceeds the predetermined value when the brightness enhancement process is performed for a period longer than a predetermined period.
  • the brightness improvement gain calculation unit 134 sets a value obtained by multiplying the brightness improvement reference gain and the cumulative load increase amount interlocking gain as the final brightness improvement gain.
  • FIG. 9 shows an example of gain setting for the cumulative load increase amount.
  • the horizontal axis represents the cumulative value
  • the vertical axis represents the cumulative load increase interlocking gain.
  • the gain according to the cumulative load increase amount is shown by a thick line L41 including a straight line falling to the right, and the cumulative load increase amount interlocking gain is 100% until the cumulative value reaches a predetermined value. It is maintained, but after the cumulative value exceeds the predetermined value, it gradually decreases with a predetermined slope, and after it decreases to 0%, it continues to be 0%.
  • the brightness improvement gain calculation unit 134 can control the brightness improvement gain of the entire screen according to the maximum value of the cumulative value for each predetermined area on the screen of the display panel by the cumulative load increase amount interlocking gain. Further, the luminance improvement gain calculation unit 134 can control the luminance improvement gain for each predetermined region according to the cumulative value for each predetermined region on the screen of the display panel by the cumulative load increase amount interlocking gain.
  • the area on the screen of the display panel can be, for example, an area of the entire screen divided into a plurality of areas having predetermined sizes in the vertical direction and the horizontal direction. Specifically, it can be a region corresponding to the division region A in FIG. 8 described above.
  • FIG. 10 is a flowchart illustrating the flow of the luminance improvement gain control process executed by the signal processing unit 111.
  • step S11 the brightness improvement gain calculation unit 134 acquires the cumulative load increase amount from the load increase amount measurement / cumulative unit 132.
  • This cumulative load increase amount is the cumulative value of the accumulated load increase amount measured by measuring the load increase amount of the display panel due to the implementation of high brightness.
  • the measurement result of the surface temperature of the display panel or the measurement result of the current flowing through the display panel may be added to the cumulative load increase amount.
  • step S12 the luminance improvement gain calculation unit 134 adaptively controls the luminance improvement gain according to the degree of influence of the element deterioration of the display panel based on the acquired cumulative load increase amount.
  • the luminance improvement gain calculation unit 134 performs control to lower the luminance improvement gain when the luminance enhancement process is performed for a long period of time and the cumulative load increase amount is high, and the luminance improvement reference gain and the cumulative load increase are performed.
  • the value multiplied by the amount-linked gain is set as the final brightness improvement gain.
  • the signal processing unit 111 measures and accumulates the amount of increase in the load on the display panel when the video signal is increased in brightness from the low-luminance display signal to the high-luminance display signal. Based on the amount of load increase, the brightness improvement gain is adaptively controlled according to the degree of influence of element deterioration.
  • the element of the display panel is an OLED element or the like of pixels arranged two-dimensionally.
  • the signal processing unit 111 has been described as a component of the display device 1, but the signal processing unit 111 may be regarded as a single device and may be a signal processing device.
  • the display device 1 is a television receiver
  • a device such as a display device may be used.
  • the display device includes, for example, a monitor for medical use, a monitor for broadcasting, a display for digital signage, and the like.
  • the display device 1 can be used as a PC (Personal Computer), a tablet terminal, a smartphone, a mobile phone, a game machine, a head-mounted display, an in-vehicle device such as a car navigation system or a monitor for a rear seat, a wearable device such as a wristwatch type or a glasses type, and the like. It may be used as a display unit of.
  • PC Personal Computer
  • tablet terminal a smartphone
  • a mobile phone such as a game machine
  • a head-mounted display such as a car navigation system or a monitor for a rear seat
  • a wearable device such as a wristwatch type or a glasses type, and the like. It may be used as a display unit of.
  • the display device 1 is an example of an OLED display device having an OLED display panel, but the present technology can also be applied to a display device such as a self-luminous display device having another self-luminous display panel. be.
  • each pixel arranged two-dimensionally on the panel unit 113 is composed of four sub-pixels of white (W), red (R), green (G), and blue (B).
  • W white
  • R red
  • G green
  • B blue
  • the color of the sub-pixel is not limited to these.
  • a sub-pixel of another color having the same high visual sensitivity as the white (W) may be used.
  • OLED may be read as “organic EL (Electro Luminescence)".
  • OLED display device can be said to be an organic EL display device.
  • video since the video is composed of a plurality of image frames, "video” may be read as "image”.
  • a signal including a signal processing unit that adaptively controls a first gain for improving the brightness of the video signal based on the acquired cumulative load increase amount according to the degree of influence of element deterioration of the display panel. Processing equipment.
  • the signal processing unit additionally adds the first gain to the second gain used for increasing the brightness, thereby realizing the increase in brightness of the video signal (1).
  • the signal processing apparatus according to any one of (3) to (3).
  • the signal processing unit uses the value obtained by multiplying the third gain and the fourth gain, which is a reference for improving the brightness, as the first gain.
  • the signal processing unit Calculate the added value when accumulating according to the load that increases due to the increase in brightness.
  • the signal processing device according to any one of (1) to (6) above, wherein the calculated added value is added for each image frame to calculate the cumulative value of the load increase amount.
  • the signal processing unit calculates a larger addition value according to a higher load in order to obtain a correlation with the amount of element deterioration.
  • the signal processing unit calculates a constant addition value in order to measure the time when the brightness is increased.
  • the signal processing device according to any one of (7) to (9), further comprising a memory for storing the cumulative value data.
  • the signal processing device according to any one of (7) to (10) above, wherein the signal processing unit calculates a cumulative value of a load increase amount for each predetermined area on the screen of the display panel. (12) The signal processing unit controls to lower the first gain when the cumulative value of the load increase amount exceeds a predetermined value when the brightness is increased for a period longer than a predetermined period. The signal processing device according to any one of (11). (13) The signal processing device according to (12), wherein the signal processing unit controls the first gain with respect to the entire screen according to the maximum value of the cumulative value for each predetermined area on the screen of the display panel.
  • the signal processing device controls the first gain for each predetermined area according to the cumulative value for each predetermined area on the screen of the display panel.
  • the signal processing device controls the first gain for each predetermined area according to the cumulative value for each predetermined area on the screen of the display panel.
  • the signal processing device controls the first gain for each predetermined area according to the cumulative value for each predetermined area on the screen of the display panel.
  • one or a plurality of temperature sensors for measuring the surface temperature are provided on the display panel.
  • the signal processing device When increasing the brightness of a video signal from a low-brightness display signal to a high-brightness display signal, the amount of increase in the load on the display panel due to the implementation of the increase in brightness is measured to obtain the accumulated cumulative load increase.
  • a signal processing method that adaptively controls a first gain for improving the brightness of the video signal based on the acquired cumulative load increase amount according to the degree of influence of element deterioration of the display panel.
  • a signal processing unit that processes video signals and A panel unit having a display panel for displaying an image corresponding to the image signal is provided.
  • the signal processing unit When the video signal is increased in brightness from a low-luminance display signal to a high-luminance display signal, the amount of increase in the load on the display panel due to the implementation of the increase in brightness is measured to obtain the accumulated cumulative load increase amount.
  • a display device that adaptively controls a first gain for improving the brightness of the video signal based on the acquired cumulative load increase amount according to the degree of influence of element deterioration of the display panel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
PCT/JP2021/015796 2020-05-01 2021-04-19 信号処理装置、信号処理方法、及び表示装置 Ceased WO2021220854A1 (ja)

Priority Applications (7)

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US17/919,631 US11790843B2 (en) 2020-05-01 2021-04-19 Signal processing apparatus, signal processing method, and display apparatus
DE112021002594.5T DE112021002594T5 (de) 2020-05-01 2021-04-19 Signalverarbeitungseinrichtung, signalverarbeitungsverfahren und anzeigeeinrichtung
JP2022517640A JPWO2021220854A1 (https=) 2020-05-01 2021-04-19
CN202411552674.2A CN119360768A (zh) 2020-05-01 2021-04-19 显示装置
CN202180030645.8A CN115485762B (zh) 2020-05-01 2021-04-19 信号处理装置、信号处理方法和显示装置
US18/238,606 US12131692B2 (en) 2020-05-01 2023-08-28 Signal processing apparatus, signal processing method, and display apparatus
US18/889,518 US12505792B2 (en) 2020-05-01 2024-09-19 Signal processing apparatus, signal processing method, and display apparatus

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US17/919,631 A-371-Of-International US11790843B2 (en) 2020-05-01 2021-04-19 Signal processing apparatus, signal processing method, and display apparatus
US18/238,606 Continuation US12131692B2 (en) 2020-05-01 2023-08-28 Signal processing apparatus, signal processing method, and display apparatus

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US20230402003A1 (en) 2023-12-14
CN115485762A (zh) 2022-12-16
US20230140888A1 (en) 2023-05-11
DE112021002594T5 (de) 2023-02-23
CN115485762B (zh) 2024-11-08
US11790843B2 (en) 2023-10-17
US12505792B2 (en) 2025-12-23
US20250087144A1 (en) 2025-03-13
JPWO2021220854A1 (https=) 2021-11-04
US12131692B2 (en) 2024-10-29

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