WO2023206698A1 - 亮度调节方法、装置及显示装置 - Google Patents

亮度调节方法、装置及显示装置 Download PDF

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WO2023206698A1
WO2023206698A1 PCT/CN2022/096346 CN2022096346W WO2023206698A1 WO 2023206698 A1 WO2023206698 A1 WO 2023206698A1 CN 2022096346 W CN2022096346 W CN 2022096346W WO 2023206698 A1 WO2023206698 A1 WO 2023206698A1
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Prior art keywords
brightness value
display brightness
display
interval
dimming
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PCT/CN2022/096346
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English (en)
French (fr)
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洪吉童
刘福林
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武汉华星光电半导体显示技术有限公司
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Publication of WO2023206698A1 publication Critical patent/WO2023206698A1/zh

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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
    • G09G3/22—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]
    • G09G3/3225—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] using an active matrix
    • G09G3/3233—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] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • the present application relates to the field of display technology, and in particular to brightness adjustment methods, devices and display devices.
  • DC dimming also known as DC dimming.
  • each pixel is self-luminous, and the display of each picture requires controlling the luminous intensity of tens of millions of pixels at the same time.
  • Each pixel is controlled by a larger number of TFT devices.
  • This DC dimming method has better color uniformity of the screen under high brightness, but when driving the OLED pixels with a small current at low brightness, the difference in the uniformity of the TFT in the manufacturing process will be highlighted, resulting in poor display effects. , problems such as uneven brightness and uneven chroma appear.
  • the existing OLED screen uses DC dimming at high brightness and PWM dimming at low brightness.
  • the principle of this PWM dimming method is shown in Figure 1, which is through "screen on - screen off”.
  • -Screen on -Screen off This method of alternating light and dark uses the visual residue of the human eye to control the brightness of the screen.
  • FIG. 2 The abscissa in Figure 2 is the display brightness value (DBV, that is, display brightness value), and the ordinate is the chromaticity value.
  • DBV display brightness value
  • the dimming boundary display brightness value is the PWM dimming mode, that is, the dimming boundary display brightness value is the display brightness value when switching from DC dimming mode to PWM dimming mode (the dimming boundary display brightness value in Figure 2 is 327) .
  • the linearity of the display brightness line located to the left of point A is poor, so the display effect of the display in this area is poor, and the display will have a color shift problem.
  • Embodiments of the present application provide a touch display panel and a touch display device to improve the dark streak phenomenon that occurs after the touch display panel undergoes a reliability test.
  • embodiments of the present application provide a brightness adjustment method, including:
  • the second display brightness value is less than the dimming boundary display brightness value
  • the dimming boundary display brightness value is the display brightness boundary value for switching between DC dimming mode and PWM dimming mode
  • the display brightness boundary value corresponds to the first gamma signal
  • the second display brightness value corresponds to the second gamma signal
  • the first display brightness value corresponds to the third gamma signal
  • the target brightness adjustment mode is a DC dimming mode or a PWM dimming mode
  • the brightness of the display device is adjusted according to the target brightness adjustment mode.
  • a brightness adjustment device including:
  • An acquisition module is used to obtain a display brightness value line.
  • the display brightness value line includes a first display brightness value interval.
  • Each display brightness value of the display brightness value line in the first display brightness value interval corresponds to the DC dimming mode;
  • the first display brightness value The interval is an interval including the first display brightness value to the second display brightness value, and the difference between the duty cycle of the first display brightness value and the duty cycle of the second display brightness value is less than the preset difference value; wherein, the first display brightness value The value is less than the second display brightness value, and the second display brightness value is less than the dimming boundary display brightness value.
  • the dimming boundary display brightness value is the display brightness boundary value for switching between DC dimming mode and PWM dimming mode; the display brightness boundary value corresponds to the A gamma signal, the second display brightness value corresponds to the second gamma signal, and the first display brightness value corresponds to the third gamma signal;
  • the determination module is used to determine the corresponding target brightness adjustment mode according to the display brightness value interval to which the acquired target display brightness value belongs in the display brightness value line, wherein the target brightness adjustment mode is a DC dimming mode or a PWM dimming mode. ;
  • the adjustment module is used to adjust the brightness of the display device according to the target brightness adjustment mode.
  • inventions of the present application provide a display device.
  • the display device includes a controller and a memory.
  • the controller is configured to execute a number of instructions stored in the memory to implement a brightness adjustment method;
  • Brightness adjustment methods include:
  • the display brightness value line includes the first display brightness value interval.
  • Each display brightness value of the display brightness value line in the first display brightness value interval corresponds to the DC dimming mode; the first display brightness value interval includes the first display brightness value interval.
  • the difference between the duty cycle of the first display brightness value and the duty cycle of the second display brightness value is less than the preset difference; wherein, the first display brightness value is less than the second display brightness value.
  • the second display brightness value is less than the dimming boundary display brightness value
  • the dimming boundary display brightness value is the display brightness boundary value for switching between DC dimming mode and PWM dimming mode
  • the display brightness boundary value corresponds to the first gamma signal
  • the second display brightness value corresponds to the second gamma signal
  • the first display brightness value corresponds to the third gamma signal
  • the target brightness adjustment mode is a DC dimming mode or a PWM dimming mode
  • the brightness of the display device is adjusted according to the target brightness adjustment mode.
  • the present application provides a brightness adjustment method, device and display device.
  • a display brightness value line is obtained, and the first display brightness value interval of the display brightness value line is an interval including the first display brightness value to the second display brightness value.
  • the first display brightness value is less than the second display brightness value, and the second display brightness value is less than the dimming boundary display brightness value, then the first display brightness value interval is an interval lower than the dimming boundary display brightness value; then set it below
  • Each display brightness value in the first display brightness value interval of the dimming boundary display brightness value corresponds to the DC dimming mode, which improves the display brightness value in the first display brightness value interval that is lower than the dimming boundary display brightness value. linearity of the line.
  • the corresponding target brightness adjustment mode is determined according to the display brightness value interval to which the obtained target display brightness value belongs in the display brightness value line.
  • the brightness of the display device is adjusted according to the target brightness adjustment mode to improve the display brightness.
  • the value is less than the dimming boundary display brightness value, the display effect of the display device will be poor, and the display device will have a color shift problem.
  • Figure 1 is a schematic diagram of the principle of the existing PWM dimming method.
  • Figure 2 is a schematic diagram of a display brightness value line for switching between existing PWM dimming and DC dimming.
  • Figure 3 is a step flow chart of a brightness adjustment method provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of a display brightness value line provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a brightness adjustment device provided by an embodiment of the present application.
  • AMOLED has many advantages such as high contrast, ultra-thinness, and foldability, and has become a research hotspot in the display field in recent years.
  • AMOLED screen display effects have improved by leaps and bounds, with high refresh rates, low blue light, 10-bit color, and high color gamut becoming commonplace.
  • DC dimming also known as DC dimming.
  • each pixel is self-luminous, and the display of each picture requires controlling the luminous intensity of tens of millions of pixels at the same time.
  • Each pixel is controlled by a larger number of TFT devices.
  • This DC dimming method has better color uniformity of the screen under high brightness, but when driving the OLED pixels with a small current at low brightness, the difference in the uniformity of the TFT in the manufacturing process will be highlighted, resulting in poor display effects. , problems such as uneven brightness and uneven chroma appear.
  • the existing OLED screen uses DC dimming at high brightness and PWM dimming at low brightness.
  • the principle of this PWM dimming method is shown in Figure 1, which is through "screen on - screen off”.
  • -Screen on -Screen off This method of alternating light and dark uses the visual residue of the human eye to control the brightness of the screen.
  • FIG. 2 The abscissa in Figure 2 is the display brightness value (DBV, that is, display brightness value), and the ordinate is the chromaticity value.
  • DBV display brightness value
  • the dimming boundary display brightness value is the PWM dimming mode, that is, the dimming boundary display brightness value is the display brightness value when switching from DC dimming mode to PWM dimming mode (the dimming boundary display brightness value in Figure 2 is 327) .
  • the linearity of the display brightness line located to the left of point A in Figure 2 is poor (the display brightness line to the left of point A in Figure 2 has a large peak, and the chromaticity value at the highest point of the peak exceeds 0.32 and reaches about 0.322), so In this area, the display effect of the display is poor, and the display will have a color shift problem.
  • FIG. 3 is a step flow chart of a brightness adjustment method provided by an embodiment of the present application.
  • the brightness adjustment method includes:
  • the display brightness value line includes a first display brightness value interval, and each display brightness value of the display brightness value line in the first display brightness value interval corresponds to the DC dimming mode;
  • the first display brightness value interval is an interval including the first display brightness value D1 to the second display brightness value D2.
  • the duty cycle of the first display brightness value D1 and the duty cycle of the second display brightness value D2 are The difference is less than the preset difference; wherein, the first display brightness value D1 is less than the second display brightness value D2, the second display brightness value D2 is less than the dimming boundary display brightness value D3, and the dimming boundary display brightness value D3 is the display brightness boundary value for switching between DC dimming mode and PWM dimming mode.
  • the display brightness boundary value corresponds to the first gamma signal, the second display brightness value corresponds to the second gamma signal, and the first display The brightness value corresponds to the third gamma signal;
  • the brightness adjustment method provided by the embodiment of the present application first obtains a display brightness value line, and the first display brightness value interval of the display brightness value line is an interval including the first display brightness value D1 to the second display brightness value D2.
  • the first display brightness value line The display brightness value D1 is less than the second display brightness value D2, and the second display brightness value D2 is less than the dimming boundary display brightness value D3, then the first display brightness value interval is an interval lower than the dimming boundary display brightness value D3; and then Setting each display brightness value in the first display brightness value interval lower than the dimming boundary display brightness value to correspond to the DC dimming mode improves the performance of the first display brightness value interval lower than the dimming boundary display brightness value. Displays the linearity of the brightness value line.
  • the corresponding target brightness adjustment mode is determined according to the display brightness value interval to which the obtained target display brightness value belongs in the display brightness value line.
  • the brightness of the display device is adjusted according to the target brightness adjustment mode to improve the display brightness.
  • the value is less than the dimming boundary display brightness value, the display effect of the display device will be poor, and the display device will have a color shift problem.
  • the display brightness value line also includes a second display brightness value interval, and each display brightness value of the display brightness value line in the second display brightness value interval corresponds to the PWM dimming mode.
  • the brightness value interval is an interval from 0 to the first display brightness value D1.
  • the second display brightness value interval is an interval from 0 to the first display brightness value D1, and each display brightness value in the second display brightness value interval is set to correspond to the PWM dimming mode, then the display brightness value line is lower than the first display brightness value.
  • the interval of the display brightness value still uses the PWM dimming mode for dimming, which can ensure the brightness uniformity of the display device when the display brightness value is lower than the first display brightness value.
  • the display brightness value line also includes a third display brightness value interval, and each display brightness value of the display brightness value line in the third display brightness value interval corresponds to the PWM dimming mode.
  • the brightness value interval is an interval including the second display brightness value D2 to the dimming boundary display brightness value D3.
  • the display brightness value line also includes a fourth display brightness value interval, and each display brightness value of the display brightness value line in the fourth display brightness value interval corresponds to the DC dimming mode.
  • the fourth display brightness value line also includes a fourth display brightness value interval.
  • the brightness value interval is the interval above the dimming boundary display brightness value D3.
  • FIG. 4 is a schematic diagram of a display brightness value line provided by an embodiment of the present application.
  • the abscissa is the display brightness value
  • the ordinate is the chromaticity value
  • the line in Figure 4 is the display brightness value line
  • the target display brightness value is any point on the display brightness value line.
  • the above-mentioned first display brightness value is D1 in Figure 4.
  • the first display brightness value is 192.
  • the target display brightness value is 192
  • the brightness of the display device is 47 nit, and the display device lights up at this time.
  • the duty cycle of screen time is 59.64%.
  • the duty cycle of the first display brightness value is the duty cycle of the display device's screen-on time when the target display brightness value is the first display brightness value.
  • the second display brightness value is D2 in Figure 4. As shown in Table 1, the second display brightness value is 326. When the target display brightness value is 326, the brightness of the display device is 79.7nit, and the screen time of the display device is 79.7nit. The duty cycle is 59.64%. The duty cycle of the screen-on time of the display device when the target display brightness value is the first display brightness value is equal to the duty cycle of the screen-on time of the display device when the target display brightness value is the first display brightness value. The duty cycle of the second display brightness value is the duty cycle of the display device's screen-on time when the target display brightness value is the second display brightness value.
  • the difference between the duty cycle of the first display brightness value and the duty cycle of the second display brightness value is less than a preset difference.
  • the duty cycle of the first display brightness value is If the duty cycle of the second display brightness value is 95% to 105%, the preset difference value is 5% of the duty cycle of the second display brightness value.
  • the preset difference value is 2.982%.
  • the above-mentioned first display brightness value can be any value lower than the second display brightness value, as long as the duty cycle of the first display brightness value and the duty cycle of the second display brightness value are less than the preset difference. .
  • a first display brightness value that meets the above requirements and is lower than the second display brightness value can be obtained by continuously debugging the display device.
  • the dimming boundary display brightness value is D3 in Figure 4. As shown in Table 1, the dimming boundary display brightness value is 327. When the target display brightness value is 327, the brightness of the display device is 80nit, and the screen time of the display device is The duty cycle is 98.04%. The difference between the dimming boundary display brightness value D3 and the second display brightness value D2 is 1.
  • the display brightness cut-off value corresponds to the first gamma signal, which means that when the display brightness value of the display device is the display brightness cut-off value, the gamma signal input into the display device at this time is the first gamma signal (Gamma BAND1).
  • the second display brightness value corresponds to the second gamma signal, which means that when the display brightness value of the display device is the second display brightness value, the gamma signal input into the display device at this time is the second gamma signal (Gamma BAND2).
  • the first display brightness value corresponds to the third gamma signal, which means that when the display brightness value of the display device is the first display brightness value, the gamma signal input into the display device at this time is the third gamma signal (Gamma BAND3).
  • the corresponding target brightness adjustment mode is determined according to the display brightness value interval to which the obtained target display brightness value belongs in the display brightness value line. For example, when the target display brightness value is 202, the target display brightness value belongs to the first display brightness value interval, the corresponding target brightness adjustment mode can be determined to be the DC dimming mode.
  • the above-mentioned first display brightness value D1, second display brightness value D2, and dimming boundary display brightness value D3 divide the display brightness value line into four areas, and the four areas are sequentially the second display brightness value interval. , the first display brightness value interval, the third display brightness value interval, and the fourth display brightness value interval.
  • the second display brightness value interval is the interval from 0 to D1 in Figure 4
  • the first display brightness value interval is the interval from D1 to D2 in Figure 4
  • the third display brightness value interval is the interval from D2 to D3 in Figure 4
  • the fourth display brightness value interval is the interval from D2 to D3 in Figure 4.
  • the display brightness value interval is the interval above D3 in Figure 4.
  • the target display brightness value within the second display brightness value interval and the third display brightness value interval adopts PWM dimming mode
  • the target display brightness value within the first display brightness value interval and the fourth display brightness value interval adopts DC Dimming mode dimming.
  • this application modifies the first display brightness value interval that is lower than the dimming boundary display brightness value from the original PWM dimming mode to the DC dimming mode, and uses the DC dimming mode to improve the first display brightness value interval. Displays the linearity of the brightness value line.
  • the linearity of the display brightness value line within the first display brightness value interval in Figure 4 is better (the display brightness line fluctuation to the left of the display brightness cutoff value in Figure 4 is smoother , and the chromaticity value corresponding to each display brightness value in Figure 4 does not exceed 0.32); thus improving the display brightness value.
  • the display brightness value is less than the dimming boundary display brightness value, the display effect of the display device is poor, and the display device will produce color shift. question.
  • the third interval only includes one display brightness value unit, indicating that the third interval is only within one display brightness value. Realize dimming in PWM dimming mode.
  • the third interval only includes one display brightness value unit, which also makes the first interval very close to the dimming boundary display brightness value D3. Therefore, the brightness adjustment method in this application is more capable of solving the problem of display brightness values near the dimming boundary display brightness value.
  • the problem of poor linearity of the line (as shown in Figure 2, the dimming boundary display brightness value is below, and the linearity problem of the brightness value line displaying near the dimming boundary display brightness value is the most prominent).
  • the display brightness value line is used to indicate the corresponding relationship between the display brightness value (display brightness value) and the chromaticity of the display device.
  • the embodiment of the present application also provides a brightness adjustment device 100.
  • the brightness adjustment device 100 includes:
  • the acquisition module 110 is used to obtain a display brightness value line, the display brightness value line includes a first display brightness value interval, and each display brightness value of the display brightness value line in the first display brightness value interval corresponds to DC dimming. mode; the first display brightness value interval is an interval including the first display brightness value D1 to the second display brightness value D2, and the duty cycle of the first display brightness value D1 is the same as the duty cycle of the second display brightness value D2.
  • the difference in duty cycle is less than the preset difference; wherein, the first display brightness value D1 is less than the second display brightness value D2, the second display brightness value D2 is less than the dimming boundary display brightness value D3, and the dimming
  • the boundary display brightness value D3 is the display brightness boundary value for switching between the DC dimming mode and the PWM dimming mode.
  • the display brightness boundary value corresponds to the first gamma signal
  • the second display brightness value corresponds to the second gamma signal
  • the first display brightness value corresponds to the third gamma signal;
  • the determination module 120 is configured to determine the corresponding target brightness adjustment mode according to the display brightness value interval to which the acquired target display brightness value belongs in the display brightness value line, wherein the target brightness adjustment mode is the DC dimming mode. Or the PWM dimming mode;
  • the adjustment module 130 is used to adjust the brightness of the display device according to the target brightness adjustment mode.
  • the acquisition module in the brightness adjustment device obtains the display brightness value line, and the first display brightness value interval of the display brightness value line is an interval including the first display brightness value D1 to the second display brightness value D2, The first display brightness value D1 is less than the second display brightness value D2, and the second display brightness value D2 is less than the dimming boundary display brightness value D3, then the first display brightness value interval is an interval lower than the dimming boundary display brightness value D3. ; Further, setting each display brightness value in the first display brightness value interval that is lower than the dimming boundary display brightness value to correspond to the DC dimming mode improves the first display brightness value that is lower than the dimming boundary display brightness value. Displays the linearity of the brightness value line in the interval.
  • the determination module determines the corresponding target brightness adjustment mode according to the display brightness value interval to which the obtained target display brightness value belongs in the display brightness value line.
  • the adjustment module adjusts the brightness of the display device according to the target brightness adjustment mode. It can improve the problem that when the display brightness value is less than the dimming boundary display brightness value, the display effect of the display device is poor, and the display device will produce color shift.
  • the display brightness value line also includes a second display brightness value interval, and each display brightness value of the display brightness value line in the second display brightness value interval corresponds to the PWM dimming mode.
  • the brightness value interval is an interval from 0 to the first display brightness value D1.
  • the second display brightness value interval is an interval from 0 to the first display brightness value D1, and each display brightness value in the second display brightness value interval is set to correspond to the PWM dimming mode, then the display brightness value line is lower than the first display brightness value.
  • the interval of the display brightness value still uses the PWM dimming mode for dimming, which can ensure the brightness uniformity of the display device when the display brightness value is lower than the first display brightness value.
  • the display brightness value line also includes a third display brightness value interval, and each display brightness value of the display brightness value line in the third display brightness value interval corresponds to the PWM dimming mode.
  • the brightness value interval is an interval including the second display brightness value D2 to the dimming boundary display brightness value D3.
  • the display brightness value line also includes a fourth display brightness value interval, and each display brightness value of the display brightness value line in the fourth display brightness value interval corresponds to the DC dimming mode.
  • the fourth display brightness value line also includes a fourth display brightness value interval.
  • the brightness value interval is the interval above the dimming boundary display brightness value D3.
  • FIG. 4 is a schematic diagram of a display brightness value line provided by an embodiment of the present application.
  • the abscissa is the display brightness value
  • the ordinate is the chromaticity value
  • the line in Figure 4 is the display brightness value line
  • the target display brightness value is any point on the display brightness value line.
  • the above-mentioned first display brightness value is D1 in Figure 4, and the first display brightness value is 192.
  • the target display brightness value is 192
  • the brightness of the display device is 47 nit
  • the duty of the display device on screen time is The ratio is 59.64%.
  • the duty cycle of the first display brightness value is the duty cycle of the display device's screen-on time when the target display brightness value is the first display brightness value.
  • the second display brightness value is D2 in Figure 4.
  • the second display brightness value is 326.
  • the brightness of the display device is 79.7nit
  • the duty cycle of the display device's screen-on time is 59.64. %.
  • the duty cycle of the screen-on time of the display device when the target display brightness value is the first display brightness value is equal to the duty cycle of the screen-on time of the display device when the target display brightness value is the first display brightness value.
  • the duty cycle of the second display brightness value is the duty cycle of the display device's screen-on time when the target display brightness value is the second display brightness value.
  • the difference between the duty cycle of the first display brightness value and the duty cycle of the second display brightness value is less than a preset difference.
  • the duty cycle of the first display brightness value is If the duty cycle of the second display brightness value is 95% to 105%, the preset difference value is 5% of the duty cycle of the second display brightness value. For example, when the duty cycle of the second display brightness value is 59.64%, the preset difference value is 2.982%.
  • the dimming boundary display brightness value is D3 in Figure 4.
  • the dimming boundary display brightness value is 327.
  • the target display brightness value is 327
  • the brightness of the display device is 80nit
  • the duty cycle of the display device's screen-on time is 98.04%.
  • the difference between the dimming boundary display brightness value D3 and the second display brightness value D2 is 1.
  • the above-mentioned first display brightness value D1, second display brightness value D2, and dimming boundary display brightness value D3 divide the display brightness value line into four areas, and the four areas are sequentially the second display brightness value interval. , the first display brightness value interval, the third display brightness value interval, and the fourth display brightness value interval.
  • the second display brightness value interval is the interval from 0 to D1 in Figure 4
  • the first display brightness value interval is the interval from D1 to D2 in Figure 4
  • the third display brightness value interval is the interval from D2 to D3 in Figure 4
  • the fourth display brightness value interval is the interval from D2 to D3 in Figure 4.
  • the display brightness value interval is the interval above D3 in Figure 4.
  • the target display brightness value within the second display brightness value interval and the third display brightness value interval adopts PWM dimming mode
  • the target display brightness value within the first display brightness value interval and the fourth display brightness value interval adopts DC Dimming mode dimming.
  • this application modifies the first display brightness value interval that is lower than the dimming boundary display brightness value from the original PWM dimming mode to the DC dimming mode, and uses the DC dimming mode to improve the first display brightness value interval. Displays the linearity of the brightness value line.
  • Figure 2 and Figure 4 it can also be seen that the linearity of the display brightness value line in the first display brightness value interval in Figure 4 is better; thus improving the display device when the display brightness value is less than the dimming boundary display brightness value The display effect is poor, and the display device will cause color shift problems.
  • the third interval only includes one display brightness value unit, indicating that the third interval is only within one display brightness value. Realize dimming in PWM dimming mode.
  • the third interval only includes one display brightness value unit, which also makes the first interval very close to the dimming boundary display brightness value D3. Therefore, the brightness adjustment device in this application can better solve the problem of display brightness values near the dimming boundary display brightness value.
  • the problem of poor linearity of the line (as shown in Figure 2, the dimming boundary display brightness value is below, and the linearity problem of the brightness value line displaying near the dimming boundary display brightness value is the most prominent).
  • the display brightness value line is used to indicate the corresponding relationship between the display brightness value and the chromaticity of the display device.
  • the present invention also provides a display device, which includes a controller and a memory.
  • the controller is configured to execute a number of instructions stored in the memory to implement the brightness adjustment method as described above.
  • the present invention also provides a storage medium in which a number of instructions are stored, and the instructions are used for execution by the controller to implement the brightness adjustment method as described in any one of the above. It should be noted that those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through programs.
  • the storage medium can include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.
  • the present application provides a brightness adjustment method, device and display device that first obtains a display brightness value line, and the first display brightness value interval of the display brightness value line includes the first display brightness value D1 to the second display brightness value D2 interval, the first display brightness value D1 is less than the second display brightness value D2, and the second display brightness value D2 is less than the dimming boundary display brightness value D3, then the first display brightness value interval is lower than the dimming boundary display The interval of brightness value D3; and then setting each display brightness value in the first display brightness value interval lower than the dimming boundary display brightness value to correspond to the DC dimming mode, then the above-mentioned display brightness value lower than the dimming boundary display brightness value is improved.
  • the linearity of the display brightness value line in the first display brightness value interval is determined according to the display brightness value interval to which the obtained target display brightness value belongs in the display brightness value line.
  • the brightness of the display device is adjusted according to the target brightness adjustment mode to improve the display brightness.
  • the value is less than the dimming boundary display brightness value, the display effect of the display device will be poor, and the display device will have a color shift problem.

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Abstract

一种亮度调节方法、装置及显示装置。该方法包括获取显示亮度值线，显示亮度值线在第一显示亮度值区间中各个显示亮度值对应DC模式；根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定目标亮度调节模式；按照目标亮度调节模式调节显示装置的亮度，改善显示效果较差和色偏的问题。

Description

亮度调节方法、装置及显示装置 技术领域
本申请涉及显示技术领域，特别是涉及亮度调节方法、装置及显示装置。
背景技术
传统LCD通过改变背光电流的方式调整背光亮度，即直流调光，也称为DC调光。而OLED面板是每个像素是自发光的，每张画面的显示都需要同时控制数以千万个像素的发光强度，各像素由数量更多的TFT器件来控制。这种DC调光的方式在高亮度下屏幕的色彩均一性较好，但在低亮度情况下小电流驱动OLED的像素，制程上TFT的均一性的差异会被凸显出来，导致显示效果不佳，出现亮度不均和色度不均等问题。为了解决此问题，现有的OLED屏幕在采用在高亮度下DC调光而低亮度下PWM调光的方式，这种PWM调光方式原理如图1所示，是通过“亮屏-灭屏-亮屏-灭屏”此种亮暗交替的方式，利用人眼的视觉残留，来控制屏幕亮度。
技术问题
目前，现有的PWM调光与DC调光相互切换这种方式如图2所示，图2中横坐标为显示亮度值(DBV，即display brightness value)，纵坐标为色度值，图2中的线为DBV线(显示亮度值线)；在图2中的A点为调光分界显示亮度值(A点横轴DBV＝327)，调光分界显示亮度值以上的值为DC调光区域，调光分界显示亮度值以下为PWM调光模式，即调光分界显示亮度值为DC调光模式切换至PWM调光模式的显示亮度值(图2中调光分界显示亮度值为327)。图2中位于A点左边的显示亮度线的线性度较差，因此在该区域内显示屏的显示效果较差，显示屏会产生色偏的问题
技术解决方案
本申请实施例提供一种触控显示面板和触控显示装置，以改善触控显示面板在经历了可靠度测试后出现的暗纹现象。
第一方面，本申请实施例提供一种亮度调节方法，包括：
获取显示亮度值线，显示亮度值线包括第一显示亮度值区间，显示亮度值线在第一显示亮度值区间中各个显示亮度值对应DC调光模式；第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，第一显示亮度值的占空比与第二显示亮度值的占空比之差小于预设差值；其中，第一显示亮度值小于第二显示亮度值，第二显示亮度值小于调光分界显示亮度值，调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；显示亮度分界值对应第一伽马信号，第二显示亮度值对应第二伽马信号，第一显示亮度值对应第三伽马信号；
根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，目标亮度调节模式为DC调光模式或PWM调光模式；
按照目标亮度调节模式调节显示装置的亮度。
第二方面，本申请实施例提供一种亮度调节装置，包括：
获取模块，用于获取显示亮度值线，显示亮度值线包括第一显示亮度值区间，显示亮度值线在第一显示亮度值区间中各个显示亮度值对应DC调光模式；第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，第一显示亮度值的占空比与第二显示亮度值的占空比之差小于预设差值；其中，第一显示亮度值小于第二显示亮度值，第二显示亮度值小于调光分界显示亮度值，调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；显示亮度分界值对应第一伽马信号，第二显示亮度值对应第二伽马信号，第一显示亮度值对应第三伽马信号；
确定模块，用于根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，目标 亮度调节模式为DC调光模式或PWM调光模式；
调节模块，用于按照目标亮度调节模式调节显示装置的亮度。
第三方面，本申请实施例提供一种显示装置，显示装置包括控制器和存储器，控制器用于执行存储于存储器的若干指令，以实现亮度调节方法；
亮度调节方法包括：
获取显示亮度值线，显示亮度值线包括第一显示亮度值区间，显示亮度值线在第一显示亮度值区间中各个显示亮度值对应DC调光模式；第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，第一显示亮度值的占空比与第二显示亮度值的占空比之差小于预设差值；其中，第一显示亮度值小于第二显示亮度值，第二显示亮度值小于调光分界显示亮度值，调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；显示亮度分界值对应第一伽马信号，第二显示亮度值对应第二伽马信号，第一显示亮度值对应第三伽马信号；
根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，目标亮度调节模式为DC调光模式或PWM调光模式；
按照目标亮度调节模式调节显示装置的亮度。
有益效果
本申请提供一种亮度调节方法、装置及显示装置首先获取显示亮度值线，而显示亮度值线的第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，所述第一显示亮度值小于第二显示亮度值，所述第二显示亮度值小于调光分界显示亮度值，则第一显示亮度值区间为低于调光分界显示亮度值的区间；再设置低于调光分界显示亮度值的所述第一显示亮度值区间中各个显示亮度值对应DC调光模式，则改善了低于调光分界显示亮度值的所述第一显示亮度值区间中显示亮度值线的线性度。然后再根据获取到的目标显示亮度值在显示 亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，最后再按照所述目标亮度调节模式调节显示装置的亮度就能够改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
附图说明
图1为现有PWM调光方式的原理示意图。
图2为现有的PWM调光与DC调光相互切换的显示亮度值线示意图。
图3为本申请实施例提供的亮度调节方法的步骤流程图。
图4为本申请实施例提供的显示亮度值线示意图。
图5为本申请实施例提供的亮度调节装置的结构示意图。
本发明的实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的首选实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请的公开内容更加透彻全面。
需要说明的是，当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件并与之结合为一体，或者可能同时存在居中元件。本文所使用的术语“层叠”、“一侧”、“另一侧”以及类似的表述只是为了说明的目的。此外，本申请所提到的“第一”及“第二”等序号用语并不代表任何顺序、数量或者重要性，只是用于区分不同的部分。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
AMOLED具有高对比度、超轻薄、可折叠等诸多优点，是近年来显示领域的研究热点。近年来，AMOLED屏幕显示效果突飞猛进，高刷新率、低蓝光、10bit色彩、高色域等屡见不鲜。
传统LCD通过改变背光电流的方式调整背光亮度，即直流调光，也称为DC调光。而OLED面板是每个像素是自发光的，每张画面的显示都需要同时控制数以千万个像素的发光强度，各像素由数量更多的TFT器件来控制。这种DC调光的方式在高亮度下屏幕的色彩均一性较好，但在低亮度情况下小电流驱动OLED的像素，制程上TFT的均一性的差异会被凸显出来，导致显示效果不佳，出现亮度不均和色度不均等问题。为了解决此问题，现有的OLED屏幕在采用在高亮度下DC调光而低亮度下PWM调光的方式，这种PWM调光方式原理如图1所示，是通过“亮屏-灭屏-亮屏-灭屏”此种亮暗交替的方式，利用人眼的视觉残留，来控制屏幕亮度。
目前，现有的PWM调光与DC调光相互切换这种方式如图2所示，图2中横坐标为显示亮度值(DBV，即display brightness value)，纵坐标为色度值，图2中的线为DBV线(显示亮度值线)；在图2中的A点为调光分界显示亮度值(A点横轴DBV＝327)，调光分界显示亮度值以上的值为DC调光区域，调光分界显示亮度值以下为PWM调光模式，即调光分界显示亮度值为DC调光模式切换至PWM调光模式的显示亮度值(图2中调光分界显示亮度值为327)。图2中位于A点左边的显示亮度线的线性度较差(图2中A点左边显示亮度线具有较大的波峰，该波峰最高点处的色度值超过0.32达到了0.322左右)，因此在该区域内显示屏的显示效果较差，显示屏会产生色偏的问题。
为解决上述问题，本申请实施例提供了一种亮度调节方法、装置及显示装置，以下将结合附图进行说明。示例性的，请参阅图3，图3是本申请实施例提供的亮度调节方法的步骤流程图。该亮度调节方法包括：
S101、获取显示亮度值线，所述显示亮度值线包括第一显示亮度值区间，所述显示亮度值线在所述第一显示亮度值区间中各个显示亮 度值对应DC调光模式；所述第一显示亮度值区间为包括第一显示亮度值D1至第二显示亮度值D2的区间，所述第一显示亮度值D1的占空比与所述第二显示亮度值D2的占空比之差小于预设差值；其中，所述第一显示亮度值D1小于第二显示亮度值D2，所述第二显示亮度值D2小于调光分界显示亮度值D3，所述调光分界显示亮度值D3为切换DC调光模式与PWM调光模式的显示亮度分界值，所述显示亮度分界值对应第一伽马信号，所述第二显示亮度值对应第二伽马信号，所述第一显示亮度值对应第三伽马信号；
S102、根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，所述目标亮度调节模式为所述DC调光模式或所述PWM调光模式；
S103、按照所述目标亮度调节模式调节显示装置的亮度。
本申请实施例提供的亮度调节方法首先获取显示亮度值线，而显示亮度值线的第一显示亮度值区间为包括第一显示亮度值D1至第二显示亮度值D2的区间，所述第一显示亮度值D1小于第二显示亮度值D2，所述第二显示亮度值D2小于调光分界显示亮度值D3，则第一显示亮度值区间为低于调光分界显示亮度值D3的区间；再设置低于调光分界显示亮度值的所述第一显示亮度值区间中各个显示亮度值对应DC调光模式，则改善了低于调光分界显示亮度值的所述第一显示亮度值区间中显示亮度值线的线性度。然后再根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，最后再按照所述目标亮度调节模式调节显示装置的亮度就能够改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
示例性的，所述显示亮度值线还包括第二显示亮度值区间，所述显示亮度值线在所述第二显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第二显示亮度值区间为包括0至第一显示亮度值D1的区间。
所述第二显示亮度值区间为包括0至第一显示亮度值D1的区间， 并设置第二显示亮度值区间中各个显示亮度值对应PWM调光模式，则显示亮度值线上低于第一显示亮度值的区间仍采用PWM调光模式进行调光，这样能够保证显示亮度值低于第一显示亮度值时显示设备的亮度均一性。
示例性的，所述显示亮度值线还包括第三显示亮度值区间，所述显示亮度值线在所述第三显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第三显示亮度值区间为包括第二显示亮度值D2至调光分界显示亮度值D3的区间。
示例性的，所述显示亮度值线还包括第四显示亮度值区间，所述显示亮度值线在所述第四显示亮度值区间中各个显示亮度值对应DC调光模式，所述第四显示亮度值区间为调光分界显示亮度值D3以上的区间。
示例性的，所述调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1。现参照图4对上述亮度调节方法进行说明，图4是本申请实施例提供的显示亮度值线示意图。在图4中横坐标为显示亮度值，纵坐标为色度值，图4中的线为显示亮度值线，目标显示亮度值为显示亮度值线上的任一一个点。
其中，上述第一显示亮度值为图4中的D1，如表1所示第一显示亮度值为192，则目标显示亮度值为192时，显示设备的亮度为47nit，且此时显示设备亮屏时间的占空比为59.64％。所述第一显示亮度值的占空比即目标显示亮度值为第一显示亮度值时，显示设备亮屏时间的占空比。
第二显示亮度值为图4中的D2，如表1所示第二显示亮度值为326，目标显示亮度值为326时，显示设备的亮度为79.7nit，且此时显示设备亮屏时间的占空比为59.64％。目标显示亮度值为第一显示亮度值时显示设备亮屏时间的占空比等于目标显示亮度值为第一显示亮度值时显示设备亮屏时间的占空比。所述第二显示亮度值的占空比即目标显示亮度值为第二显示亮度值时，显示设备亮屏时间的占空比。所述第一显示亮度值的占空比与所述第二显示亮度值的占空比 之差小于预设差值，示例性的，本申请中第一显示亮度值的占空比为所述第二显示亮度值的占空比的95％至105％，则预设差值为第二显示亮度值的占空比的5％。例如第二显示亮度值的占空比为59.64％时，预设差值为2.982％。其中，上述第一显示亮度值可以为低于第二显示亮度值的任意值，只要第一显示亮度值的占空比与第二显示亮度值的占空比只差小于预设差值即可。可以通过不断调试显示设备从而获得一个满足上述要求的，且低于第二显示亮度值的第一显示亮度值。
调光分界显示亮度值为图4中的D3，如表1所示调光分界显示亮度值为327，目标显示亮度值为327时，显示设备的亮度为80nit，且此时显示设备亮屏时间的占空比为98.04％。调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1。显示亮度分界值对应第一伽马信号，表示当显示设备的显示亮度值为显示亮度分界值时，此时显示设备中输入的伽马信号为第一伽马信号(Gamma BAND1)。第二显示亮度值对应第二伽马信号，表示当显示设备的显示亮度值为第二显示亮度值时，此时显示设备中输入的伽马信号为第二伽马信号(Gamma BAND2)。第一显示亮度值对应第三伽马信号，表示当显示设备的显示亮度值为第一显示亮度值时，此时显示设备中输入的伽马信号为第三伽马信号(Gamma BAND3)。则上述S102中根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，例如目标显示亮度值为202时，目标显示亮度值属于第一显示亮度值区间，则能确定相应的目标亮度调节模式为DC调光模式。
如图4所示，上述第一显示亮度值D1、第二显示亮度值D2、调光分界显示亮度值D3将显示亮度值线分割为四个区域，四个区域依次为第二显示亮度值区间、第一显示亮度值区间、第三显示亮度值区间、第四显示亮度值区间。第二显示亮度值区间为图4中0至D1的区间，第一显示亮度值区间为图4中D1至D2的区间，第三显示亮度值区间为图4中D2至D3的区间，第四显示亮度值区间为图4中D3以上的区间。其中，第二显示亮度值区间及第三显示亮度值区间内的目标显示亮度值采用PWM调光模式调光，第一显示亮度值区间及第四 显示亮度值区间内的目标显示亮度值采用DC调光模式调光。
可以看出，本申请是将低于调光分界显示亮度值的第一显示亮度值区间由原本的PWM调光模式修改为DC调光模式，采用DC调光模式提高第一显示亮度值区间内显示亮度值线的线性度。此外，相较图2和图4也可以看出，图4中第一显示亮度值区间内显示亮度值线的线性度更好(图4中显示亮度分界值左边的显示亮度线波动更为平缓，且图4中每个显示亮度值对应的色度值均没有超过0.32)；从而改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
而设置调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1，则第三区间内仅包括1个显示亮度值单位，说明第三区间仅在1个显示亮度值内实现PWM调光模式的调光。第三区间内仅包括1个显示亮度值单位也使得第一区间十分靠近调光分界显示亮度值D3，故本申请中的亮度调节方法更够更好解决调光分界显示亮度值附近显示亮度值线的线性度较差的问题(如图2所示，调光分界显示亮度值以下，且在调光分界显示亮度值附近显示亮度值线的线性度问题最为突出)。
Figure PCTCN2022096346-appb-000001
表1
示例性的，所述显示亮度值线用于指示显示亮度值(显示亮度值)与显示装置的色度之间的对应关系。
另一方面，本申请实施例还提供了一种亮度调节装置100，如图5所示该亮度调节装置100包括：
获取模块110，用于获取显示亮度值线，所述显示亮度值线包括第一显示亮度值区间，所述显示亮度值线在所述第一显示亮度值区间中各个显示亮度值对应DC调光模式；所述第一显示亮度值区间为包括第一显示亮度值D1至第二显示亮度值D2的区间，所述第一显示亮度值D1的占空比与所述第二显示亮度值D2的占空比之差小于预设差值；其中，所述第一显示亮度值D1小于第二显示亮度值D2，所述第二显示亮度值D2小于调光分界显示亮度值D3，所述调光分界显示亮度值D3为切换DC调光模式与PWM调光模式的显示亮度分界值，所述显示亮度分界值对应第一伽马信号，所述第二显示亮度值对应第二伽马信号，所述第一显示亮度值对应第三伽马信号；
确定模块120，用于根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，所述目标亮度调节模式为所述DC调光模式或所述PWM调光模式；
调节模块130，用于按照所述目标亮度调节模式调节显示装置的亮度。
本申请实施例提供的亮度调节装置中获取模块获取显示亮度值线，而显示亮度值线的第一显示亮度值区间为包括第一显示亮度值D1至第二显示亮度值D2的区间，所述第一显示亮度值D1小于第二显示亮度值D2，所述第二显示亮度值D2小于调光分界显示亮度值D3，则第一显示亮度值区间为低于调光分界显示亮度值D3的区间；再设置低于调光分界显示亮度值的所述第一显示亮度值区间中各个显示亮度值对应DC调光模式，则改善了低于调光分界显示亮度值的所述第一显示亮度值区间中显示亮度值线的线性度。然后确定模块再根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，最后调节模块再按照所述目标亮度调节模式调节显示装置的亮度就能够改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
示例性的，所述显示亮度值线还包括第二显示亮度值区间，所述显示亮度值线在所述第二显示亮度值区间中各个显示亮度值对应PWM 调光模式，所述第二显示亮度值区间为包括0至第一显示亮度值D1的区间。
所述第二显示亮度值区间为包括0至第一显示亮度值D1的区间，并设置第二显示亮度值区间中各个显示亮度值对应PWM调光模式，则显示亮度值线上低于第一显示亮度值的区间仍采用PWM调光模式进行调光，这样能够保证显示亮度值低于第一显示亮度值时显示设备的亮度均一性。
示例性的，所述显示亮度值线还包括第三显示亮度值区间，所述显示亮度值线在所述第三显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第三显示亮度值区间为包括第二显示亮度值D2至调光分界显示亮度值D3的区间。
示例性的，所述显示亮度值线还包括第四显示亮度值区间，所述显示亮度值线在所述第四显示亮度值区间中各个显示亮度值对应DC调光模式，所述第四显示亮度值区间为调光分界显示亮度值D3以上的区间。
示例性的，所述调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1。现参照图4对上述亮度调节方法进行说明，图4是本申请实施例提供的显示亮度值线示意图。在图4中横坐标为显示亮度值，纵坐标为色度值，图4中的线为显示亮度值线，目标显示亮度值为显示亮度值线上的任一一个点。
其中，上述第一显示亮度值为图4中的D1，第一显示亮度值为192，则目标显示亮度值为192时，显示设备的亮度为47nit，且此时显示设备亮屏时间的占空比为59.64％。所述第一显示亮度值的占空比即目标显示亮度值为第一显示亮度值时，显示设备亮屏时间的占空比。
第二显示亮度值为图4中的D2，第二显示亮度值为326，目标显示亮度值为326时，显示设备的亮度为79.7nit，且此时显示设备亮屏时间的占空比为59.64％。目标显示亮度值为第一显示亮度值时显示设备亮屏时间的占空比等于目标显示亮度值为第一显示亮度值时 显示设备亮屏时间的占空比。所述第二显示亮度值的占空比即目标显示亮度值为第二显示亮度值时，显示设备亮屏时间的占空比。所述第一显示亮度值的占空比与所述第二显示亮度值的占空比之差小于预设差值，示例性的，本申请中第一显示亮度值的占空比为所述第二显示亮度值的占空比的95％至105％，则预设差值为第二显示亮度值的占空比的5％。例如第二显示亮度值的占空比为59.64％时，预设差值为2.982％。
调光分界显示亮度值为图4中的D3，调光分界显示亮度值为327，目标显示亮度值为327时，显示设备的亮度为80nit，且此时显示设备亮屏时间的占空比为98.04％。调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1。
如图4所示，上述第一显示亮度值D1、第二显示亮度值D2、调光分界显示亮度值D3将显示亮度值线分割为四个区域，四个区域依次为第二显示亮度值区间、第一显示亮度值区间、第三显示亮度值区间、第四显示亮度值区间。第二显示亮度值区间为图4中0至D1的区间，第一显示亮度值区间为图4中D1至D2的区间，第三显示亮度值区间为图4中D2至D3的区间，第四显示亮度值区间为图4中D3以上的区间。其中，第二显示亮度值区间及第三显示亮度值区间内的目标显示亮度值采用PWM调光模式调光，第一显示亮度值区间及第四显示亮度值区间内的目标显示亮度值采用DC调光模式调光。
可以看出，本申请是将低于调光分界显示亮度值的第一显示亮度值区间由原本的PWM调光模式修改为DC调光模式，采用DC调光模式提高第一显示亮度值区间内显示亮度值线的线性度。此外，相较图2和图4也可以看出，图4中第一显示亮度值区间内显示亮度值线的线性度更好；从而改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
而设置调光分界显示亮度值D3与所述第二显示亮度值D2的差值为1，则第三区间内仅包括1个显示亮度值单位，说明第三区间仅在1个显示亮度值内实现PWM调光模式的调光。第三区间内仅包括1个 显示亮度值单位也使得第一区间十分靠近调光分界显示亮度值D3，故本申请中的亮度调节装置更够更好解决调光分界显示亮度值附近显示亮度值线的线性度较差的问题(如图2所示，调光分界显示亮度值以下，且在调光分界显示亮度值附近显示亮度值线的线性度问题最为突出)。
示例性的，所述显示亮度值线用于指示显示亮度值与显示装置的色度之间的对应关系。
本发明还提供了一种显示装置，所述显示装置包括控制器和存储器，所述控制器用于执行存储于所述存储器的若干指令，以实现如上文所述的亮度调节方法。
本发明还提供了一种存储介质，所述存储介质中存储若干指令，所述指令用于供控制器执行以实现如上文任一所述的亮度调节方法。需要说明的是，本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成。其中，存储介质可以包括：只读存储器(ROM，Read Only Memory)、随机存取记忆体(RAM，Random Access Memory)、磁盘或光盘等。
综上，本申请提供一种亮度调节方法、装置及显示装置首先获取显示亮度值线，而显示亮度值线的第一显示亮度值区间为包括第一显示亮度值D1至第二显示亮度值D2的区间，所述第一显示亮度值D1小于第二显示亮度值D2，所述第二显示亮度值D2小于调光分界显示亮度值D3，则第一显示亮度值区间为低于调光分界显示亮度值D3的区间；再设置低于调光分界显示亮度值的所述第一显示亮度值区间中各个显示亮度值对应DC调光模式，则改善了低于调光分界显示亮度值的所述第一显示亮度值区间中显示亮度值线的线性度。然后再根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，最后再按照所述目标亮度调节模式调节显示装置的亮度就能够改善显示亮度值小于调光分界显示亮度值时，显示设备的显示效果较差，显示设备会产生色偏的问题。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简 洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (17)

  1. 一种亮度调节方法，其中，包括：
    获取显示亮度值线，所述显示亮度值线包括第一显示亮度值区间，所述显示亮度值线在所述第一显示亮度值区间中各个显示亮度值对应DC调光模式；所述第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，所述第一显示亮度值的占空比与所述第二显示亮度值的占空比之差小于预设差值；其中，所述第一显示亮度值小于第二显示亮度值，所述第二显示亮度值小于调光分界显示亮度值，所述调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；所述显示亮度分界值对应第一伽马信号，所述第二显示亮度值对应第二伽马信号，所述第一显示亮度值对应第三伽马信号；
    根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，所述目标亮度调节模式为所述DC调光模式或所述PWM调光模式；
    按照所述目标亮度调节模式调节显示装置的亮度。
  2. 根据权利要求1所述的亮度调节方法，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  3. 根据权利要求1所述的亮度调节方法，其中，所述显示亮度值线还包括第二显示亮度值区间，所述显示亮度值线在所述第二显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第二显示亮度值区间为包括0至第一显示亮度值的区间。
  4. 根据权利要求3所述的亮度调节方法，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  5. 根据权利要求3所述的亮度调节方法，其中，所述显示亮度值线还包括第三显示亮度值区间，所述显示亮度值线在所述第三显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第三显示亮度值区间为包括第二显示亮度值至调光分界显示亮度值的区间。
  6. 根据权利要求5所述的亮度调节方法，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  7. 根据权利要求6所述的亮度调节方法，其中，所述显示亮度值线用于指示显示亮度值与显示装置的色度之间的对应关系。
  8. 一种亮度调节装置，其中，包括：
    获取模块，用于获取显示亮度值线，所述显示亮度值线包括第一显示亮度值区间，所述显示亮度值线在所述第一显示亮度值区间中各个显示亮度值对应DC调光模式；所述第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，所述第一显示亮度值的占空比与所述第二显示亮度值的占空比之差小于预设差值；其中，所述第一显示亮度值小于第二显示亮度值，所述第二显示亮度值小于调光分界显示亮度值，所述调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；所述显示亮度分界值对应第一伽马信号，所述第二显示亮度值对应第二伽马信号，所述第一显示亮度值对应第三伽马信号；
    确定模块，用于根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，所述目标亮度调节模式为所述DC调光模式或所述PWM调光模式；
    调节模块，用于按照所述目标亮度调节模式调节显示装置的亮度。
  9. 根据权利要求8所述的亮度调节装置，其中，所述显示亮度值线还包括第二显示亮度值区间，所述显示亮度值线在所述第二显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第二显示亮度值区间为包括0至第一显示亮度值的区间。
  10. 根据权利要求8所述的亮度调节装置，其中，所述显示亮度值线还包括第三显示亮度值区间，所述显示亮度值线在所述第三显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第三显示亮度值区间为包括第二显示亮度值至调光分界显示亮度值的区间。
  11. 一种显示装置，所述显示装置包括控制器和存储器，其中，所述控制器用于执行存储于所述存储器的若干指令，以实现亮度调节方法；
    所述亮度调节方法包括：
    获取显示亮度值线，所述显示亮度值线包括第一显示亮度值区间，所述显示亮度值线在所述第一显示亮度值区间中各个显示亮度值对应DC调光模式；所述第一显示亮度值区间为包括第一显示亮度值至第二显示亮度值的区间，所述第一显示亮度值的占空比与所述第二显示亮度值的占空比之差小于预设差值；其中，所述第一显示亮度值小于第二显示亮度值，所述第二显示亮度值小于调光分界显示亮度值，所述调光分界显示亮度值为切换DC调光模式与PWM调光模式的显示亮度分界值；所述显示亮度分界值对应第一伽马信号，所述第二显示亮度值对应第二伽马信号，所述第一显示亮度值对应第三伽马信号；
    根据获取到的目标显示亮度值在显示亮度值线中所属的显示亮度值区间，确定相应的目标亮度调节模式，其中，所述目标亮度调节模式为所述DC调光模式或所述PWM调光模式；
    按照所述目标亮度调节模式调节显示装置的亮度。
  12. 根据权利要求11所述的显示装置，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  13. 根据权利要求11所述的显示装置，其中，所述显示亮度值线还包括第二显示亮度值区间，所述显示亮度值线在所述第二显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第二显示亮度值区间为包括0至第一显示亮度值的区间。
  14. 根据权利要求13所述的显示装置，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  15. 根据权利要求13所述的显示装置，其中，所述显示亮度值线还包括第三显示亮度值区间，所述显示亮度值线在所述第三显示亮度值区间中各个显示亮度值对应PWM调光模式，所述第三显示亮度值区间为包括第二显示亮度值至调光分界显示亮度值的区间。
  16. 根据权利要求15所述的显示装置，其中，所述调光分界显示亮度值与所述第二显示亮度值的差值为1。
  17. 根据权利要求16所述的显示装置，其中，所述显示亮度值线用于指示显示亮度值与显示装置的色度之间的对应关系。
PCT/CN2022/096346 2022-04-28 2022-05-31 亮度调节方法、装置及显示装置 WO2023206698A1 (zh)

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