WO2019201234A1 - 显示亮度调节方法、发光控制电路及显示装置 - Google Patents

显示亮度调节方法、发光控制电路及显示装置 Download PDF

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Publication number
WO2019201234A1
WO2019201234A1 PCT/CN2019/082861 CN2019082861W WO2019201234A1 WO 2019201234 A1 WO2019201234 A1 WO 2019201234A1 CN 2019082861 W CN2019082861 W CN 2019082861W WO 2019201234 A1 WO2019201234 A1 WO 2019201234A1
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Prior art keywords
brightness
display
display device
duty ratio
control signal
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PCT/CN2019/082861
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English (en)
French (fr)
Inventor
彭宽军
羊振中
徐智强
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京东方科技集团股份有限公司
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Priority to US16/614,709 priority Critical patent/US10971060B2/en
Publication of WO2019201234A1 publication Critical patent/WO2019201234A1/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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • 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
    • 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
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a display brightness adjustment method, an illumination control circuit, and a display device.
  • the OLED (Organic Light-Emitting Diode) display device has many advantages such as self-luminous, ultra-thin, fast response, high contrast, wide viewing angle, and the like, and is a display device which has been widely concerned at present.
  • the driving circuit drives the light emitting element to emit light, thereby realizing the display function of the OLED display device.
  • the thin film transistor included in the driving circuit is prone to leakage during operation, the display brightness of the OLED display device decreases during the display time of one frame, which causes the human eye to easily observe the blinking display.
  • the OLED display device in order to reduce the power consumption of the OLED display device, the OLED display device generally operates in a low frequency display state, and when the OLED display device performs low frequency display, the leakage current of the thin film transistor in the driving circuit is more serious, and the human eye is The flicker phenomenon that occurs during low frequency display is more sensitive, making the flickering phenomenon perceived by the human eye more serious when the OLED display device performs low frequency display.
  • the present disclosure provides a display brightness adjustment method, which is applied to an illumination control circuit, and the illumination control circuit is configured to generate an illumination control signal for controlling illumination of a display device, wherein the display brightness adjustment method includes:
  • the duty ratio of the light emission control signal is adjusted such that the display brightness of the display device is within the predetermined brightness range.
  • the illumination control circuit is configured to generate the illumination control signal according to a frame start signal; and the adjusting a duty ratio of the illumination control signal includes: adjusting a duty ratio of the frame start signal, The duty cycle of the illumination control signal is adjusted.
  • adjusting a duty ratio of the light emission control signal includes:
  • Determining, during a display time of each frame, the display device is N time periods in which the display brightness is not within the predetermined brightness range, where N is an integer greater than or equal to 1;
  • the duty cycle of the illumination control signal is adjusted by adjusting the duty cycle of the frame start signal during each of the N time periods during the display time of each frame.
  • the predetermined brightness range is greater than a predetermined minimum brightness and less than a predetermined maximum brightness; and when the display brightness of the display device is not within a predetermined brightness range, adjusting a duty ratio of the illumination control signal includes:
  • the duty ratio of the illumination control signal is reduced by reducing the duty ratio of the frame start signal.
  • the method for displaying brightness of the display further includes:
  • the duty cycle of the light emission control signal is reduced to reduce the display brightness of the display device.
  • the duty ratios of the illumination control signals corresponding to the N time periods are at least partially the same.
  • the active level of the illumination control signal is a low level.
  • the present disclosure also provides an illumination control circuit for the display brightness adjustment method as described above, the illumination control circuit comprising:
  • an adjustment circuit configured to adjust a duty ratio of the illumination control signal when the display brightness of the display device is not within a predetermined brightness range, so that a display brightness of the display device is within the predetermined brightness range.
  • the adjusting circuit is configured to adjust a duty ratio of the lighting control signal by adjusting a duty ratio of a frame start signal when a display brightness of the display device is not within a predetermined brightness range.
  • the adjusting circuit includes:
  • Determining a sub-circuit configured to determine, during a display time of each frame, the display device is N time periods in which the display brightness is not within the predetermined brightness range, where N is an integer greater than or equal to 1;
  • Adjusting a sub-circuit for adjusting the illumination control signal by adjusting a duty ratio of the frame start signal during each of the N time periods during a display time of each frame Duty cycle.
  • the predetermined brightness range is greater than a predetermined minimum brightness and less than a predetermined maximum brightness
  • the adjusting circuit is specifically configured to: when a display brightness of the display device is less than the predetermined minimum brightness, increase a duty ratio of the light emission control signal by increasing a duty ratio of the frame start signal; When the display brightness of the display device is greater than the predetermined maximum brightness, the duty ratio of the light emission control signal is reduced by reducing the duty ratio of the frame start signal;
  • the adjusting circuit is further configured to increase a duty ratio of the light emission control signal to increase display brightness of the display device when an ambient light brightness in an environment to which the display device is applied is greater than the predetermined maximum brightness And reducing a duty ratio of the light emission control signal to reduce a display brightness of the display device when an ambient light brightness in an environment to which the display device is applied is less than the predetermined minimum brightness.
  • the illumination control circuit further includes a sensor for detecting the brightness of the ambient light.
  • the duty ratios of the illumination control signals corresponding to the N time periods are at least partially the same.
  • the active level of the illumination control signal is a low level.
  • the present disclosure also provides a display device including the illumination control circuit as described above.
  • FIG. 1 is a schematic structural view of a light emission control circuit in the related art
  • FIG. 3 is a schematic diagram showing a drop in a display luminance waveform in a frame time in the related art
  • FIG. 4 is a schematic diagram of adjusting a duty ratio of a bright state in a display luminance waveform in one frame time according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram showing a relationship between a duty ratio of a frame start signal and a duty ratio of a bright state in a display luminance waveform in one frame time in the related art
  • FIG. 6 is a schematic diagram showing the relationship between the duty ratio of the frame start signal and the duty ratio of the bright state in the display luminance waveform in one frame time in the embodiment of the present disclosure.
  • Embodiments of the present disclosure provide a display brightness adjustment method, which is applied to an illumination control circuit for generating an illumination control signal EM for controlling illumination of a display device.
  • the display brightness adjustment method includes: when the display brightness of the display device is not at a predetermined brightness In the range, the duty ratio of the light emission control signal EM is adjusted so that the brightness of the display device is within a predetermined brightness range.
  • the specific structure of the related art illumination control circuit is various, and generally, the input and the off of a plurality of transistors in the control circuit are controlled by a clock signal, a high level signal, and a low level signal, thereby implementing the input.
  • the frame start signal ESTV is converted into an output illumination control signal EM.
  • a specific illumination control circuit is given below, and the operation process thereof will be described.
  • the illumination control circuit includes: a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and an eighth transistor T8. a ninth transistor T9, a tenth transistor T10, a first capacitor C1, a second capacitor C2, and a third capacitor C3, wherein the first transistor T1 to the tenth transistor T10 are P-type transistors, and the connection relationship of the transistors is as shown in the figure.
  • VGH in the figure represents a high level signal input terminal
  • VGL represents a low level signal input terminal
  • ECB and ECK represent clock signals
  • INPUT terminal is used to input frame start signal ESTV
  • OUTPUT terminal is used to output illumination control signal EM. .
  • the actual operation process of the above illumination control circuit is as follows: as shown in FIG. 2, in the first period P1, the second period P2 and the third period P3, the ECK signal terminal controls the fourth transistor T4 to be turned on, and the high level frame is The start signal ESTV is written to the node A in FIG. 1, so that under the control of the node A, the tenth transistor T10 is turned off. In the first period P1, the potential of the node B is at a high level, and the ninth switch is cut off. The OUTPUT terminal outputs an illumination control signal EM, and EM is at a low level.
  • the potential of the C node is a low level, thereby controlling the sixth transistor T6 and the seventh transistor to be turned on, and the potential of the node B is changed to a low level, which has a low potential
  • the Node B further controls the ninth transistor T9 to be turned on, and at the same time, since the A node continues to remain at the high level, the tenth transistor T10 is turned off, thereby causing the OUTPUT terminal to output the high-level light emission control signal EM.
  • the INPUT terminal inputs a low-level frame start signal ESTV, and the ECK signal controls the fourth transistor T4 to be turned on, so that the low-level frame start signal ESTV is written to the A node, so that A The node becomes a low level, so that the low-level A node controls the eighth transistor T8 and the tenth transistor T10 to be turned on, and further, the eighth transistor T8 is turned on, so that the B node becomes a high level, thereby making the ninth The transistor T9 is turned off, and the OUTPUT terminal outputs a low-level light emission control signal EM.
  • the ECB signal is at a low level, and under the coupling of the third capacitor C3, the level of the point A becomes lower, so that the OUTPUT terminal continues to output the low-level illumination control signal EM.
  • P5 in FIG. 2 represents the fifth time period
  • P6 represents the sixth time period
  • P7 represents the seventh time period
  • P8 represents the eighth time period
  • P11 represents the eleventh time period
  • Data represents the data signal.
  • the illumination control signal EM outputted by the illumination control circuit is used to control the display device to emit light, that is, the duty ratio of the illumination control signal EM can determine the duty ratio of the display device in the display luminance waveform LM, which is in a bright state. Therefore, when the luminance of the display device is not within the predetermined luminance range, the duty ratio of the display luminance waveform LM in the display state can be adjusted by adjusting the duty ratio of the illumination control signal EM, thereby implementing control of the display device.
  • Luminous brightness It should be noted that the predetermined brightness range may be set according to actual viewing needs.
  • the display brightness adjustment method when the light emission brightness of the display device is not within the predetermined brightness range, the brightness of the display device can be located at a predetermined brightness by adjusting the duty ratio of the light emission control signal EM.
  • the display brightness adjustment method can maintain the display brightness of the display device at a predetermined time. Within the brightness range, the viewer is prevented from seeing a flickering display.
  • the display brightness adjustment method provided by the embodiment of the present disclosure when used to adjust the display brightness of the display device, it can be ensured that the display device prevents the viewer from observing the blinking display picture in the low frequency display state, thereby ensuring that the display device is low.
  • the power consumption of the working state allows the viewer to achieve a better user experience.
  • the illuminating control circuit provided by the above embodiment is specifically configured to generate the illuminating control signal EM according to the frame start signal ESTV; the step of adjusting the duty ratio of the illuminating control signal EM specifically includes: adjusting the frame start signal ESTV The duty ratio is adjusted to adjust the duty ratio of the illumination control signal EM.
  • the frame start signal ESTV is input from the INPUT terminal, and the illumination control signal EM is outputted from the OUTPUT terminal, and the illumination control circuit generates the illumination control signal EM according to the frame start signal ESTV.
  • the duty ratio of the start signal ESTV determines the duty ratio of the illumination control signal EM.
  • the illumination control signal EM can be adjusted by adjusting the duty ratio of the frame start signal ESTV.
  • the duty ratio which in turn adjusts the duty cycle of the display device's display luminance waveform LM in a bright state, thereby controlling the luminance of the display device.
  • the step of adjusting the duty ratio of the light emission control signal EM specifically includes:
  • N is an integer greater than or equal to 1
  • the duty ratio of the illumination control signal EM is adjusted by adjusting the duty ratio of the frame start signal ESTV during each display period of each frame.
  • the display device when the display device is in actual operation, due to leakage of the thin film transistor included therein, or other factors, the display device may easily cause display brightness degradation during a display time of one frame, and the display device may exhibit display brightness.
  • the falling time may be distributed in different stages of the display time of one frame. Therefore, in the display brightness adjusting method provided by the above embodiment, the display device may be first determined that the display brightness is not within the predetermined brightness range during the display time of each frame.
  • the duty ratio of the light emission control signal EM corresponding to each time period may be set according to actual needs, that is, the light emission control corresponding to each time period.
  • the duty cycles of the signals EM may be different, or they may all be the same or partially the same.
  • the above method for determining that the display device displays N time periods in which the brightness is not within the predetermined brightness range during the display time of each frame is various, for example, when the display device is factory-detected, it is determined that the display brightness is not predetermined. N time periods within the luminance range, but are not limited thereto.
  • the predetermined brightness range is greater than the predetermined minimum brightness and less than the predetermined maximum brightness; when the display brightness of the display device is not within the predetermined brightness range, the step of adjusting the duty ratio of the light emission control signal EM specifically includes:
  • the duty ratio of the illumination control signal EM is reduced by reducing the duty ratio of the frame start signal ESTV.
  • the display brightness of the above display device is not within the predetermined brightness range.
  • the display brightness of the display device is less than the predetermined minimum brightness; in the second case, the display brightness of the display device is greater than the predetermined maximum brightness.
  • the duty ratio of the light emission control signal EM can be increased by increasing the duty ratio of the frame start signal ESTV, thereby causing the display brightness of the display device.
  • the duty cycle in the bright state of the waveform LM is increased, which improves the display brightness of the display device.
  • the display brightness of the display device is high.
  • the duty ratio of the light emission control signal EM can be reduced by reducing the duty ratio of the frame start signal ESTV, thereby reducing the display device.
  • the duty ratio of the bright state in the display luminance waveform LM is such that the display luminance of the display device is lowered.
  • the display brightness is gradually decreased due to the gradual increase of the leakage current of the thin film transistor, and the specific adjustment process of the display brightness adjustment method using the display brightness adjustment method provided by the above embodiment is described in detail. .
  • the duty ratio of the frame start signal ESTV input in the illumination control circuit is constant
  • the duty ratio of the illumination control signal EM outputted by the illumination control circuit is constant, and thus the display device generates In the display luminance waveform LM, the duty ratio in the bright state is constant, and the waveform of the display luminance tends to be declining due to leakage of the thin film transistor included in the driving circuit portion of the display device.
  • the display time of one frame (such as Frame1) is divided into two parts, that is, the display time of the first half frame and the display time of the second half frame, and it is determined that the leakage current of the thin film transistor is increased in the display time of the second half frame.
  • the display brightness of the display device is less than a predetermined minimum brightness.
  • the duty ratio of the light emission control signal EM may be increased by increasing the duty ratio of the frame start signal ESTV during the display time of the second half frame, thereby
  • the duty ratio of the display luminance waveform LM in the display state (such as X2) is increased, so that the display luminance of the display device can be ensured even if the maximum value of the display luminance is smaller than the maximum value of the display luminance corresponding to the previous half frame time.
  • the overall display brightness of the display device is kept constant within a predetermined brightness range.
  • the illumination control signal EM can ensure that the display brightness of the display device is within a predetermined brightness range under a small duty ratio, so there is no need to increase the illumination control signal.
  • the display time of one frame can be divided into four display periods of equalization, as shown in FIG. 5, in four display periods,
  • the duty ratio of the frame start signal ESTV is constant, so that the duty ratio of the light emission control signal EM does not change.
  • the frame start signal ESTV has a smaller duty ratio
  • the corresponding illumination control signal EM has a smaller duty ratio
  • the frame The start signal ESTV has a large duty ratio
  • the corresponding illumination control signal EM has a large duty ratio.
  • the illumination control signals EM shown in FIG. 3 to FIG. 6 are all at a low level, that is, the duty ratio of the illumination control signal EM is a low level occupied within one cycle.
  • the time ratio of course, the illumination control signal EM can also be set to be active high according to actual needs.
  • the display brightness adjustment method provided by the above embodiment further includes:
  • the duty ratio of the light emission control signal EM is reduced to reduce the display brightness of the display device.
  • the ambient light brightness may be detected by a sensor disposed on the display device, and the processor in the display device determines whether the ambient light brightness is greater than a predetermined maximum brightness or less than a predetermined minimum brightness, when the environment in the environment to which the display device is applied
  • the duty ratio of the light-emitting control signal EM can be increased by increasing the duty ratio of the frame start signal ESTV, thereby improving the display brightness of the display device; when the environment in which the display device is applied is in an environment When the brightness is less than the predetermined minimum brightness, the duty ratio of the light emission control signal EM can be reduced by reducing the duty ratio of the frame start signal ESTV, thereby reducing the display brightness of the display device.
  • the embodiment of the present disclosure further provides an illumination control circuit for implementing the display brightness adjustment method provided by the foregoing embodiment, where the display brightness adjustment circuit includes:
  • the adjusting circuit is configured to adjust a duty ratio of the light emission control signal EM when the display brightness of the display device is not within the predetermined brightness range, so that the brightness of the display device is within a predetermined brightness range.
  • the display brightness adjustment method provided by the above embodiment is applied to the illumination control circuit, and the illumination control signal EM output by the illumination control circuit is used to control the display device to emit light, that is, the duty ratio of the illumination control signal EM can determine the display device.
  • the duty ratio is in a bright state. Therefore, when the luminance of the display device is not within the predetermined luminance range, the illumination control signal can be adjusted by the adjustment circuit included in the illumination control circuit further provided by the embodiment of the present disclosure.
  • the duty cycle of the EM which in turn adjusts the duty cycle of the display device's display luminance waveform LM in a bright state, thereby controlling the luminance of the display device.
  • the adjustment circuit can adjust the brightness of the display device by adjusting the duty ratio of the illumination control signal EM when the illumination brightness of the display device is not within the predetermined brightness range.
  • the illumination control circuit provided by the embodiment of the present disclosure can maintain the display brightness of the display device within a predetermined brightness range, even when the display device performs low frequency display, when the display brightness of the display device decreases. Thereby, the viewer is prevented from observing the blinking display. Therefore, the illumination control circuit provided by the embodiment of the present disclosure can ensure that the display device prevents the viewer from observing the blinking display screen in the low frequency display state, thereby ensuring that the display device realizes the viewer in a low power consumption state. A better user experience.
  • the adjusting circuit provided by the above embodiment is specifically configured to adjust the duty ratio of the lighting control signal EM by adjusting the duty ratio of the frame start signal ESTV when the display brightness of the display device is not within the predetermined brightness range.
  • the frame start signal ESTV is generally input from the INPUT terminal, and the illumination control signal EM is outputted from the OUTPUT terminal, and the illumination control circuit generates the illumination control signal EM according to the frame start signal ESTV.
  • the duty ratio of the start signal ESTV determines the duty ratio of the illumination control signal EM.
  • the illumination control signal EM can be adjusted by adjusting the duty ratio of the frame start signal ESTV.
  • the duty ratio which in turn adjusts the duty cycle of the display device's display luminance waveform LM in a bright state, thereby controlling the luminance of the display device.
  • the adjustment circuit provided in the foregoing embodiment includes:
  • N is an integer greater than or equal to 1;
  • the adjusting sub-circuit is configured to adjust the duty ratio of the lighting control signal EM by adjusting the duty ratio of the frame start signal ESTV in each time period during the display time of each frame.
  • the determining sub-circuit may first determine that the display device displays N time periods in which the brightness is not within the predetermined brightness range during the display time of each frame, and then in each display time, the display brightness is not in each display time. Adjusting the duty cycle of the frame start signal ESTV by adjusting the sub-circuit to adjust the duty ratio of the light-emission control signal EM, thereby adjusting the display brightness of the display device LM in the bright state.
  • the air ratio controls the brightness of the display device within a predetermined brightness range, so that the viewer does not watch the picture flicker when viewing the picture displayed by the display device in the low frequency display state.
  • the predetermined brightness range is greater than a predetermined minimum brightness and less than a predetermined maximum brightness;
  • the adjustment circuit provided by the above embodiment is specifically configured to: when the display brightness of the display device is less than a predetermined minimum brightness, by increasing the frame start signal ESTV The duty ratio increases the duty ratio of the illumination control signal EM; when the display luminance of the display device is greater than the predetermined maximum luminance, the duty ratio of the illumination control signal EM is reduced by decreasing the duty ratio of the frame start signal ESTV.
  • the adjusting circuit provided by the above embodiment is further configured to: when the ambient light brightness in the environment to which the display device is applied is greater than a predetermined maximum brightness, increase a duty ratio of the light emission control signal EM to improve display brightness of the display device; When the ambient light brightness in the environment to which the display device is applied is less than the predetermined minimum brightness, the duty ratio of the light emission control signal EM is reduced to reduce the display brightness of the display device.
  • the ambient light brightness may be detected by a sensor disposed on the display device, and the processor in the display device determines whether the ambient light brightness is greater than a predetermined maximum brightness or less than a predetermined minimum brightness, when the environment in the environment to which the display device is applied
  • the duty ratio of the frame start signal ESTV may be increased by the adjustment circuit to increase the duty ratio of the light emission control signal EM, thereby improving the display brightness of the display device; when the display device is used in an environment When the ambient light brightness is less than the predetermined minimum brightness, the duty ratio of the frame start signal ESTV can be reduced by the adjustment circuit to reduce the duty ratio of the light emission control signal EM, thereby reducing the display brightness of the display device.
  • the embodiment of the present disclosure further provides a display device, including the illumination control circuit provided by the above embodiment.
  • the adjustment circuit is capable of setting the brightness of the display device within a predetermined brightness range by adjusting the duty ratio of the illumination control signal EM when the illumination brightness of the display device is not within the predetermined brightness range. Therefore, when the display device provided by the embodiment of the present disclosure includes the display brightness adjustment circuit provided by the above embodiments, it can ensure that the brightness of the screen displayed by the display device is within a predetermined brightness range in the low frequency display state, thereby avoiding viewer observation. To the flashing display. It can be seen that the display device provided by the embodiment of the present disclosure can prevent the viewer from observing the blinking display screen in the low frequency display state, and realizes that the display device satisfies the viewer's better user experience under the low power consumption working state.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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Abstract

本公开公开一种显示亮度调节方法、发光控制电路、显示装置。所述显示亮度调节方法，应用于发光控制电路，所述发光控制电路用于产生控制显示器件发光的发光控制信号，所述显示亮度调节方法包括：当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比，以使所述显示器件的亮度位于预定亮度范围之内。

Description

显示亮度调节方法、发光控制电路及显示装置
相关申请的交叉引用
本申请主张在2018年4月17日在中国提交的中国专利申请号No.201810344077.9的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，尤其涉及一种显示亮度调节方法、发光控制电路、显示装置。
背景技术
OLED(Organic Light-Emitting Diode，有机发光二极管)显示器件具有自发光、超薄、反应速度快、对比度高、视角广等诸多优点，是目前受到广泛关注的一种显示器件。
OLED显示器件在工作时，由驱动电路驱动发光元件发光，从而实现OLED显示器件的显示功能。但是由于驱动电路在工作过程中，其所包括的薄膜晶体管容易出现漏电的情况，导致OLED显示器件在一帧的显示时间内显示亮度会下降，进而导致人眼容易观察到闪烁的显示画面。而且，为了降低OLED显示器件的功耗，一般会使OLED显示器件工作在低频显示的状态，而在OLED显示器件进行低频显示时，驱动电路中的薄膜晶体管的漏电情况更加严重，而且人眼对低频显示时出现的闪烁现象更加敏感，使得在OLED显示器件进行低频显示时，人眼感受到的闪烁现象更加严重。
发明内容
本公开提供一种显示亮度调节方法，应用于发光控制电路，所述发光控制电路用于产生控制显示器件发光的发光控制信号，其中，所述显示亮度调节方法包括：
当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比，以使所述显示器件的显示亮度位于所述预定亮度范围之内。
可选的，所述发光控制电路用于根据帧起始信号产生所述发光控制信号；所述调节所述发光控制信号的占空比包括：通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
可选的，所述当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比包括：
确定所述显示器件在每一帧的显示时间内，所述显示亮度不在所述预定亮度范围内的N个时间段，其中，N为大于或等于1的整数；
在每一帧的显示时间内，在所述N个时间段中的每一个所述时间段，通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
可选的，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；所述当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比包括：
当所述显示器件的显示亮度小于所述预定最小亮度时，通过增加所述帧起始信号的占空比，增加所述发光控制信号的占空比；
当所述显示器件的显示亮度大于所述预定最大亮度时，通过减小所述帧起始信号的占空比，减小所述发光控制信号的占空比。
可选的，所述的显示亮度调节方法，还包括：
当所述显示器件所应用的环境中的环境光亮度大于所述预定最大亮度时，增加所述发光控制信号的占空比，以提升所述显示器件的显示亮度；
当所述显示器件所应用的环境中的环境光亮度小于所述预定最小亮度时，减小所述发光控制信号的占空比，以降低所述显示器件的显示亮度。
可选的，所述N个时间段各自对应的所述发光控制信号的占空比至少部分相同。
可选的，所述发光控制信号的有效电平为低电平。
本公开还提供一种发光控制电路，用于如上所述的显示亮度调节方法，所述发光控制电路包括：
调节电路，用于当显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比，以使所述显示器件的显示亮度位于所述预定亮度范围之内。
可选的，所述调节电路用于当所述显示器件的显示亮度不在预定亮度范围内时，通过调节帧起始信号的占空比，调节所述发光控制信号的占空比。
可选的，所述调节电路包括：
确定子电路，用于确定所述显示器件在每一帧的显示时间内，所述显示亮度不在所述预定亮度范围内的N个时间段，其中，N为大于或等于1的整数；
调节子电路，用于在每一帧的显示时间内，在所述N个时间段中的每一个所述时间段，通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
可选的，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；
所述调节电路具体用于：当所述显示器件的显示亮度小于所述预定最小亮度时，通过增加所述帧起始信号的占空比，增加所述发光控制信号的占空比；当所述显示器件的显示亮度大于所述预定最大亮度时，通过减小所述帧起始信号的占空比，减小所述发光控制信号的占空比；
所述调节电路还用于：当所述显示器件所应用的环境中的环境光亮度大于所述预定最大亮度时，增加所述发光控制信号的占空比，以提升所述显示器件的显示亮度；当所述显示器件所应用的环境中的环境光亮度小于所述预定最小亮度时，减小所述发光控制信号的占空比，以降低所述显示器件的显示亮度。
可选的，所述的发光控制电路，还包括传感器，用于检测所述环境光亮度。
可选的，所述N个时间段各自对应的所述发光控制信号的占空比至少部分相同。
可选的，所述发光控制信号的有效电平为低电平。
本公开还提供一种显示装置，包括如上所述的发光控制电路。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本公开的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的 不当限定。在附图中：
图1为相关技术中发光控制电路的结构示意图；
图2为相关技术中发光控制电路的时序图；
图3为相关技术中一帧时间内显示亮度波形下降的示意图；
图4为本公开实施例中一帧时间内调节显示亮度波形中亮态的占空比的示意图；
图5为相关技术中一帧时间内帧起始信号的占空比与显示亮度波形中亮态的占空比之间的关系示意图；
图6为本公开实施例中一帧时间内帧起始信号的占空比与显示亮度波形中亮态的占空比之间的关系示意图。
具体实施方式
为了进一步说明本公开实施例提供的显示亮度调节电路及调节方法、显示装置，下面结合说明书附图进行详细描述。
本公开实施例提供了一种显示亮度调节方法，应用于发光控制电路，发光控制电路用于产生控制显示器件发光的发光控制信号EM，显示亮度调节方法包括：当显示器件的显示亮度不在预定亮度范围内时，调节发光控制信号EM的占空比，以使显示器件的亮度位于预定亮度范围之内。
具体地，相关技术的发光控制电路的具体结构多种多样，一般均是通过时钟信号、高电平信号和低电平信号等控制电路中的多个晶体管的导通和截止，从而实现将输入的帧起始信号ESTV转换为输出的发光控制信号EM。为了清楚的说明发光控制电路的工作情况，下面给出一具体的发光控制电路，并对其工作过程进行说明。
如图1所示，发光控制电路包括：第一晶体管T1、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、第六晶体管T6、第七晶体管T7、第八晶体管T8、第九晶体管T9、第十晶体管T10、第一电容C1、第二电容C2和第三电容C3，其中第一晶体管T1至第十晶体管T10均为P型晶体管，各晶体管的连接关系如图所示，图中的VGH代表高电平信号输入端、VGL代表低电平信号输入端、ECB和ECK代表时钟信号，INPUT端用于输入帧起始信 号ESTV，OUTPUT端用于输出发光控制信号EM。
上述发光控制电路的实际工作过程为：如图2所示，在第一时段P1、第二时段P2和第三时段P3中，ECK信号端控制第四晶体管T4导通，将高电平的帧起始信号ESTV写入到图1中的A节点，使得在A节点的控制下，第十晶体管T10截止，在该第一时段P1，B节点的电位为高电平，控制第九开关管截止，OUTPUT端输出发光控制信号EM，此时EM为低电平。在第四时间段P4至第九时间段P9，C节点的电位为低电平，从而控制第六晶体管T6和第七晶体管导通，将B节点的电位变为低电平，该具有低电位的B节点进一步控制第九晶体管T9导通，同时，由于A节点继续保持在高电平，第十晶体管T10截止，从而使得OUTPUT端输出高电平的发光控制信号EM。在第十时间段P10，INPUT端输入低电平的帧起始信号ESTV，且ECK信号控制第四晶体管T4导通，使得将低电平的帧起始信号ESTV写入到A节点，使A节点变为低电平，从而低电平的A节点控制第八晶体管T8和第十晶体管T10导通，进一步地，第八晶体管T8导通，使得B节点变为高电平，从而使得第九晶体管T9截止，OUTPUT端输出低电平的发光控制信号EM。在第十二时间段T12，ECB信号处于低电平，在第三电容C3的耦合作用下，A点的电平变得更低，使得OUTPUT端继续输出低电平的发光控制信号EM。
需要说明的是，图2中的P5代表第五时间段，P6代表第六时间段，P7代表第七时间段，P8代表第八时间段，P11代表第十一时间段，Data代表数据信号。
更进一步地，由于上述发光控制电路输出的发光控制信号EM用于控制显示器件发光，即发光控制信号EM的占空比能够决定显示器件的显示亮度波形LM中，处于亮态的占空比，因此，当显示器件的发光亮度不在预定亮度范围内时，可通过调节发光控制信号EM的占空比，调节显示器件的显示亮度波形LM中处于亮态的占空比，从而实现控制显示器件的发光亮度。需要说明的是，上述预定亮度范围可根据实际观看需要设定。
根据上述分析可知，本公开实施例提供的显示亮度调节方法中，在显示器件的发光亮度不在预定亮度范围内时，能够通过调节发光控制信号EM的占空比，使显示器件的亮度位于预定亮度范围之内，这样即使显示器件在进行 低频显示(例如30Hz)的情况下，当显示器件的显示亮度下降时，采用本公开实施例提供的显示亮度调节方法能够将显示器件的显示亮度维持在预定亮度范围之内，从而避免了观看者观察到闪烁的显示画面。因此，在利用本公开实施例提供的显示亮度调节方法调节显示器件的显示亮度时，能够保证显示器件在低频的显示状态下，避免观看者观察到闪烁的显示画面，从而保证了显示器件在低功耗的工作状态下，让观看者实现更好的用户体验。
进一步地，上述实施例提供的发光控制电路具体用于根据帧起始信号ESTV产生发光控制信号EM；上述调节发光控制信号EM的占空比的步骤具体包括：通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比。
具体地，上述实施例提供的发光控制电路中，从INPUT端输入帧起始信号ESTV，OUTPUT端输出发光控制信号EM，发光控制电路根据帧起始信号ESTV产生发光控制信号EM，因此，帧起始信号ESTV的占空比决定了发光控制信号EM的占空比，当显示器件的显示亮度不在预定亮度范围内时，可通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比，进而调节显示器件的显示亮度波形LM中处于亮态的占空比，从而实现控制显示器件的发光亮度。
进一步地，上述当显示器件的显示亮度不在预定亮度范围内时，调节发光控制信号EM的占空比的步骤具体包括：
确定显示器件在每一帧的显示时间内，显示亮度不在预定亮度范围内的N个时间段，N为大于或等于1的整数；
在每一帧的显示时间内，在每一个时间段，通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比。
具体地，显示器件在实际工作时，由于其所包括的薄膜晶体管存在漏电的原因，或其它因素，容易导致显示器件在一帧的显示时间内出现显示亮度下降的问题，而且显示器件出现显示亮度下降的时间可能分布在一帧的显示时间内的不同阶段，因此，上述实施例提供的显示亮度调节方法中，可先确定显示器件在每一帧的显示时间内，显示亮度不在预定亮度范围内的N个时间段，然后在每一帧的显示时间内，在每一个显示亮度不在预定亮度范围内的时间段，通过调节帧起始信号ESTV的占空比，来调节发光控制信号EM的 占空比，从而实现调节显示器件的显示亮度波形LM中处于亮态的占空比，将显示器件的发光亮度控制在预定亮度范围内，使观看者在观看由处于低频显示状态的显示器件显示的画面时，不会观看到画面闪烁的现象。
值得注意的是，在上述显示亮度不在预定亮度范围内的N个时间段中，各时间段所对应的发光控制信号EM的占空比可根据实际需要设置，即各时间段所对应的发光控制信号EM的占空比可以各不相同，也可以全部相同或者部分相同。
此外，上述确定显示器件在每一帧的显示时间内，显示亮度不在预定亮度范围内的N个时间段的方法多种多样，例如，可在对显示器件进行出厂检测时，确定显示亮度不在预定亮度范围内的N个时间段，但不仅限于此。
进一步地，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；当显示器件的显示亮度不在预定亮度范围内时，调节发光控制信号EM的占空比的步骤具体包括：
当显示器件的显示亮度小于预定最小亮度时，通过增加帧起始信号ESTV的占空比，增加发光控制信号EM的占空比；
当显示器件的显示亮度大于预定最大亮度时，通过减小帧起始信号ESTV的占空比，减小发光控制信号EM的占空比。
更详细地说，上述显示器件的显示亮度不在预定亮度范围内包括两种情况，第一种情况，显示器件的显示亮度小于预定最小亮度；第二种情况，显示器件的显示亮度大于预定最大亮度；在第一种情况下，即显示器件的显示亮度较低，因此，可通过增加帧起始信号ESTV的占空比，来增加发光控制信号EM的占空比，进而使得显示器件的显示亮度波形LM中处于亮态的占空比增加，提升了显示器件的显示亮度。而第二种情况下，即显示器件的显示亮度较高，此时，可通过减小帧起始信号ESTV的占空比，来减小发光控制信号EM的占空比，进而减小显示器件的显示亮度波形LM中处于亮态的占空比，使得显示器件的显示亮度降低。
下面以显示器件在一帧的显示时间内，由于薄膜晶体管的漏电逐渐增加，导致显示亮度逐渐降低为例，对采用上述实施例提供的显示亮度调节方法进行显示亮度调节的具体调节过程进行详细说明。
如图3所示，当发光控制电路中输入的帧起始信号ESTV的占空比恒定不变时，由发光控制电路输出的发光控制信号EM的占空比恒定不变，进而显示器件产生的显示亮度波形LM中，处于亮态的占空比恒定不变，并且由于显示器件中驱动电路部分包括的薄膜晶体管的漏电等原因，该显示亮度的波形会一直处于下降的趋势。
如图4所示，将一帧的显示时间(如Frame1)划分成两部分，即前半帧显示时间和后半帧显示时间，并确定在后半帧显示时间内，由于薄膜晶体管的漏电增加，显示器件的显示亮度小于预定最小亮度，在这种情况下，在后半帧显示时间内，可通过增加帧起始信号ESTV的占空比，来增加发光控制信号EM的占空比，进而使得显示器件的显示亮度波形LM中处于亮态(如X2)的占空比增加，这样即使显示亮度的最大值比前半帧时间时对应的显示亮度的最大值小，也能够保证显示器件的显示亮度在预定亮度范围内，使显示器件的整体显示亮度不变。而在前半帧显示时间内，由于薄膜晶体管的漏电较小，发光控制信号EM在较小的占空比下，就能够保证显示器件的显示亮度在预定亮度范围内，因此不需要增加发光控制信号EM的占空比，从而显示器件的显示亮度波形LM中处于亮态(如X1)的占空比不变。
为了更清楚的说明帧起始信号ESTV和发光控制信号EM之间的关系，可将一帧的显示时间划分成均等的四个显示时间段，如图5所示，在四个显示时间段，帧起始信号ESTV的占空比不变，从而使得发光控制信号EM的占空比不变。如图6所示，在前两个显示时间段，帧起始信号ESTV具有较小的占空比，相应的发光控制信号EM具有较小的占空比；在后两个显示时间段，帧起始信号ESTV具有较大的占空比，相应的发光控制信号EM具有较大的占空比。
需要说明的是，图3至图6中示出的发光控制信号EM均是以低电平为有效电平，即发光控制信号EM的占空比是低电平在一个周期之内所占的时间比率，当然发光控制信号EM也可以根据实际需要设置成高电平有效。
进一步地，上述实施例提供的显示亮度调节方法还包括：
当显示器件所应用的环境中的环境光亮度大于预定最大亮度时，增加发光控制信号EM的占空比，以提升显示器件的显示亮度；
当显示器件所应用的环境中的环境光亮度小于预定最小亮度时，减小发光控制信号EM的占空比，以降低显示器件的显示亮度。
具体地，可通过设置在显示器件上的传感器检测环境光亮度，并通过显示器件中的处理器判断环境光亮度是否大于预定最大亮度或者小于预定最小亮度，当显示器件所应用的环境中的环境光亮度大于预定最大亮度时，可通过增加帧起始信号ESTV的占空比，来增加发光控制信号EM的占空比，进而提升显示器件的显示亮度；当显示器件所应用的环境中的环境光亮度小于预定最小亮度时，可通过减小帧起始信号ESTV的占空比，来减小发光控制信号EM的占空比，从而降低显示器件的显示亮度。
本公开实施例还提供了一种发光控制电路，用于实施上述实施例提供的显示亮度调节方法，所述显示亮度调节电路包括：
调节电路，用于当显示器件的显示亮度不在预定亮度范围内时，调节发光控制信号EM的占空比，以使显示器件的亮度位于预定亮度范围之内。
具体地，由于上述实施例提供的显示亮度调节方法应用于发光控制电路，而发光控制电路输出的发光控制信号EM用于控制显示器件发光，即发光控制信号EM的占空比能够决定显示器件的显示亮度波形LM中，处于亮态的占空比，因此，当显示器件的发光亮度不在预定亮度范围内时，可通过本公开实施例还提供的发光控制电路中包括的调节电路调节发光控制信号EM的占空比，进而调节显示器件的显示亮度波形LM中处于亮态的占空比，从而实现控制显示器件的发光亮度。
根据上述分析可知，本公开实施例提供的发光控制电路中，调节电路能够在显示器件的发光亮度不在预定亮度范围内时，通过调节发光控制信号EM的占空比，使显示器件的亮度位于预定亮度范围之内，这样即使显示器件在进行低频显示的情况下，当显示器件的显示亮度下降时，本公开实施例提供的发光控制电路能够将显示器件的显示亮度维持在预定亮度范围之内，从而避免了观看者观察到闪烁的显示画面。因此，本公开实施例提供的发光控制电路能够保证显示器件在低频的显示状态下，避免观看者观察到闪烁的显示画面，从而保证了显示器件在低功耗的工作状态下，让观看者实现更好的用户体验。
进一步地，上述实施例提供的调节电路具体用于当显示器件的显示亮度不在预定亮度范围内时，通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比。
具体地，传统的发光控制电路中，一般都是从INPUT端输入帧起始信号ESTV，OUTPUT端输出发光控制信号EM，发光控制电路根据帧起始信号ESTV产生发光控制信号EM，因此，帧起始信号ESTV的占空比决定了发光控制信号EM的占空比，当显示器件的显示亮度不在预定亮度范围内时，可通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比，进而调节显示器件的显示亮度波形LM中处于亮态的占空比，从而实现控制显示器件的发光亮度。
进一步地，上述实施例提供的调节电路包括：
确定子电路，用于确定显示器件在每一帧的显示时间内，显示亮度不在预定亮度范围内的N个时间段，N为大于或等于1的整数；
调节子电路，用于在每一帧的显示时间内，在每一个时间段，通过调节帧起始信号ESTV的占空比，调节发光控制信号EM的占空比。
具体地，可先通过确定子电路确定显示器件在每一帧的显示时间内，显示亮度不在预定亮度范围内的N个时间段，然后在每一帧的显示时间内，在每一个显示亮度不在预定亮度范围内的时间段，通过调节子电路调节帧起始信号ESTV的占空比，来调节发光控制信号EM的占空比，从而实现调节显示器件的显示亮度波形LM中处于亮态的占空比，将显示器件的发光亮度控制在预定亮度范围内，使观看者在观看由处于低频显示状态的显示器件显示的画面时，不会观看到画面闪烁的现象。
进一步地，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；上述实施例提供的调节电路具体用于：当显示器件的显示亮度小于预定最小亮度时，通过增加帧起始信号ESTV的占空比，增加发光控制信号EM的占空比；当显示器件的显示亮度大于预定最大亮度时，通过减小帧起始信号ESTV的占空比，减小发光控制信号EM的占空比。
进一步地，上述实施例提供的调节电路还用于：当显示器件所应用的环境中的环境光亮度大于预定最大亮度时，增加发光控制信号EM的占空比，以 提升显示器件的显示亮度；当显示器件所应用的环境中的环境光亮度小于预定最小亮度时，减小发光控制信号EM的占空比，以降低显示器件的显示亮度。
具体地，可通过设置在显示器件上的传感器检测环境光亮度，并通过显示器件中的处理器判断环境光亮度是否大于预定最大亮度或者小于预定最小亮度，当显示器件所应用的环境中的环境光亮度大于预定最大亮度时，可通过调节电路增加帧起始信号ESTV的占空比，来增加发光控制信号EM的占空比，进而提升显示器件的显示亮度；当显示器件所应用的环境中的环境光亮度小于预定最小亮度时，可通过调节电路减小帧起始信号ESTV的占空比，来减小发光控制信号EM的占空比，从而降低显示器件的显示亮度。
本公开实施例还提供了一种显示装置，包括上述实施例提供的发光控制电路。
根据上述实施例提供的发光控制电路中，调节电路能够在显示器件的发光亮度不在预定亮度范围内时，通过调节发光控制信号EM的占空比，使显示器件的亮度位于预定亮度范围之内，因此，本公开实施例提供的显示装置在包括上述实施例提供的显示亮度调节电路时，能够保证在低频显示状态下显示装置显示的画面亮度均位于预定亮度范围之内，从而避免了观看者观察到闪烁的显示画面。可见，本公开实施例提供的显示装置能够在低频的显示状态下，避免观看者观察到闪烁的显示画面，实现了显示装置在低功耗的工作状态下，满足观看者更好的用户体验。
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (15)

  1. 一种显示亮度调节方法，应用于发光控制电路，所述发光控制电路用于产生控制显示器件发光的发光控制信号，其中，所述显示亮度调节方法包括：
    当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比，以使所述显示器件的显示亮度位于所述预定亮度范围之内。
  2. 根据权利要求1所述的显示亮度调节方法，其中，所述发光控制电路用于根据帧起始信号产生所述发光控制信号；所述调节所述发光控制信号的占空比包括：通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
  3. 根据权利要求2所述的显示亮度调节方法，其中，所述当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比包括：
    确定所述显示器件在每一帧的显示时间内，所述显示亮度不在所述预定亮度范围内的N个时间段，其中，N为大于或等于1的整数；
    在每一帧的显示时间内，在所述N个时间段中的每一个所述时间段，通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
  4. 根据权利要求2所述的显示亮度调节方法，其中，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；所述当所述显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比包括：
    当所述显示器件的显示亮度小于所述预定最小亮度时，通过增加所述帧起始信号的占空比，增加所述发光控制信号的占空比；
    当所述显示器件的显示亮度大于所述预定最大亮度时，通过减小所述帧起始信号的占空比，减小所述发光控制信号的占空比。
  5. 根据权利要求4所述的显示亮度调节方法，还包括：
    当所述显示器件所应用的环境中的环境光亮度大于所述预定最大亮度时，增加所述发光控制信号的占空比，以提升所述显示器件的显示亮度；
    当所述显示器件所应用的环境中的环境光亮度小于所述预定最小亮度时，减小所述发光控制信号的占空比，以降低所述显示器件的显示亮度。
  6. 根据权利要求3所述的显示亮度调节方法，其中，所述N个时间段各自对应的所述发光控制信号的占空比至少部分相同。
  7. 根据权利要求3所述的显示亮度调节方法，其中，所述发光控制信号的有效电平为低电平。
  8. 一种发光控制电路，用于实施如权利要求1～7任一项所述的显示亮度调节方法，所述发光控制电路包括：
    调节电路，用于当显示器件的显示亮度不在预定亮度范围内时，调节所述发光控制信号的占空比，以使所述显示器件的显示亮度位于所述预定亮度范围之内。
  9. 根据权利要求8所述的发光控制电路，其中，所述调节电路用于当所述显示器件的显示亮度不在预定亮度范围内时，通过调节帧起始信号的占空比，调节所述发光控制信号的占空比。
  10. 根据权利要求9所述的显示亮度调节电路，其中，所述调节电路包括：
    确定子电路，用于确定所述显示器件在每一帧的显示时间内，所述显示亮度不在所述预定亮度范围内的N个时间段，其中，N为大于或等于1的整数；
    调节子电路，用于在每一帧的显示时间内，在所述N个时间段中的每一个所述时间段，通过调节所述帧起始信号的占空比，调节所述发光控制信号的占空比。
  11. 根据权利要求9所述的发光控制电路，其中，所述预定亮度范围为大于预定最小亮度而小于预定最大亮度；
    所述调节电路具体用于：当所述显示器件的显示亮度小于所述预定最小亮度时，通过增加所述帧起始信号的占空比，增加所述发光控制信号的占空比；当所述显示器件的显示亮度大于所述预定最大亮度时，通过减小所述帧起始信号的占空比，减小所述发光控制信号的占空比；
    所述调节电路还用于：当所述显示器件所应用的环境中的环境光亮度大于所述预定最大亮度时，增加所述发光控制信号的占空比，以提升所述显示器件的显示亮度；当所述显示器件所应用的环境中的环境光亮度小于所述预 定最小亮度时，减小所述发光控制信号的占空比，以降低所述显示器件的显示亮度。
  12. 根据权利要求11所述的发光控制电路，还包括传感器，用于检测所述环境光亮度。
  13. 根据权利要求10所述的发光控制电路，其中，所述N个时间段各自对应的所述发光控制信号的占空比至少部分相同。
  14. 根据权利要求10所述的发光控制电路，其中，所述发光控制信号的有效电平为低电平。
  15. 一种显示装置，包括如权利要求8-14任一项所述的发光控制电路。
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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108346399B (zh) 2018-04-17 2020-04-17 京东方科技集团股份有限公司 一种显示亮度调节模组及调节方法、显示装置
CN110675824B (zh) * 2019-10-09 2021-08-27 京东方科技集团股份有限公司 一种信号输出电路、驱动ic、显示装置及其驱动方法
CN112837641B (zh) * 2019-11-25 2023-09-12 敦泰电子股份有限公司 显示器低帧率模式驱动方法
CN113327553B (zh) * 2020-02-28 2022-08-05 Oppo广东移动通信有限公司 图像显示方法、显示驱动集成电路芯片及终端
CN111243520B (zh) * 2020-03-23 2021-09-21 京东方科技集团股份有限公司 亮度调节方法、亮度调节装置及oled显示器
CN111462691A (zh) * 2020-05-13 2020-07-28 京东方科技集团股份有限公司 亮度调节方法及亮度调节装置、显示装置
CN111798801B (zh) * 2020-05-29 2022-06-24 厦门天马微电子有限公司 显示面板及其驱动方法和驱动电路
CN111862890B (zh) * 2020-08-28 2022-05-24 武汉天马微电子有限公司 显示面板及其驱动方法及显示装置
CN112071274B (zh) * 2020-09-15 2023-04-07 北京集创北方科技股份有限公司 亮度调节方法、装置及显示设备
TWI740655B (zh) * 2020-09-21 2021-09-21 友達光電股份有限公司 顯示裝置的驅動方法
CN113140180A (zh) * 2021-04-16 2021-07-20 武汉华星光电半导体显示技术有限公司 像素电路、显示面板及控制方法
US20240013708A1 (en) * 2022-07-08 2024-01-11 X Display Company Technology Limited Multiplexed column drivers for passive-matrix control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040008252A1 (en) * 2002-07-09 2004-01-15 Mitsuaki Osame Method for deciding duty factor in driving light-emitting device and driving method using the duty factor
CN1855204A (zh) * 2005-04-28 2006-11-01 三星Sdi株式会社 有机发光显示器以及驱动它的方法
CN101707040A (zh) * 2009-08-04 2010-05-12 深圳市天微电子有限公司 一种用于led显示驱动的pwm驱动方法
CN107342058A (zh) * 2017-08-30 2017-11-10 创维液晶器件(深圳)有限公司 液晶显示模组亮度调节方法、测试板、系统和设备
CN108346399A (zh) * 2018-04-17 2018-07-31 京东方科技集团股份有限公司 一种显示亮度调节模组及调节方法、显示装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4274070B2 (ja) * 2004-07-23 2009-06-03 ソニー株式会社 表示装置及びその駆動方法
KR100836424B1 (ko) * 2007-02-05 2008-06-09 삼성에스디아이 주식회사 유기 전계 발광표시장치 및 그 구동방법
CN101211538A (zh) * 2007-12-25 2008-07-02 康佳集团股份有限公司 一种背光亮度的调节方法
JP5600456B2 (ja) * 2009-05-19 2014-10-01 ローム株式会社 発光ダイオードの駆動回路およびそれを用いた発光装置およびディスプレイ装置、駆動回路の保護方法
KR101865586B1 (ko) * 2011-04-08 2018-06-11 삼성디스플레이 주식회사 유기전계발광 표시장치 및 그의 구동방법
KR101850994B1 (ko) * 2011-11-18 2018-04-23 삼성디스플레이 주식회사 표시 장치의 휘도 조절 방법 및 이를 이용한 표시 장치
KR20140058283A (ko) * 2012-11-06 2014-05-14 삼성디스플레이 주식회사 표시 장치 및 표시 장치의 구동 방법
CN103021348A (zh) * 2012-12-28 2013-04-03 东莞宇龙通信科技有限公司 显示装置和屏幕背光控制方法
CN105741792B (zh) 2014-12-10 2018-08-14 青岛海信电器股份有限公司 一种灰阶亮度调整方法、装置及3d显示设备
CN106409238A (zh) * 2016-08-30 2017-02-15 延锋伟世通电子科技（上海）有限公司 车载显示器pwm调光方法
CN106900117B (zh) * 2017-03-29 2019-08-13 广东南能汇智节能科技有限公司 一种led灯光亮度调节方法及装置
CN107424572A (zh) * 2017-06-12 2017-12-01 青岛海信电器股份有限公司 一种显示驱动方法、装置及显示器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040008252A1 (en) * 2002-07-09 2004-01-15 Mitsuaki Osame Method for deciding duty factor in driving light-emitting device and driving method using the duty factor
CN1855204A (zh) * 2005-04-28 2006-11-01 三星Sdi株式会社 有机发光显示器以及驱动它的方法
CN101707040A (zh) * 2009-08-04 2010-05-12 深圳市天微电子有限公司 一种用于led显示驱动的pwm驱动方法
CN107342058A (zh) * 2017-08-30 2017-11-10 创维液晶器件(深圳)有限公司 液晶显示模组亮度调节方法、测试板、系统和设备
CN108346399A (zh) * 2018-04-17 2018-07-31 京东方科技集团股份有限公司 一种显示亮度调节模组及调节方法、显示装置

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