WO2024077517A1 - 脉宽调节方法、脉宽调节模组和显示装置 - Google Patents
脉宽调节方法、脉宽调节模组和显示装置 Download PDFInfo
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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]
Definitions
- the present disclosure relates to the field of display technology, and in particular to a pulse width modulation method, a pulse width modulation module and a display device.
- the effective pulse width of the light emitting control signal is generally of equal width.
- the TFT thin film transistor
- an embodiment of the present disclosure provides a pulse width modulation method, which is applied to a display panel, wherein the display panel includes a pixel circuit, the pixel circuit is connected to a light emitting control signal, and is used to control a light emitting element to emit light under the control of the light emitting control signal; a display cycle includes a refresh frame and a hold frame; the pulse width modulation method includes:
- At least one effective pulse width of the light-emitting control signal is increased so that at least one effective pulse width of the light-emitting control signal is greater than a first effective pulse width threshold;
- At least one effective pulse width of the light-emitting control signal is lowered so that at least one effective pulse width of the light-emitting control signal is smaller than a second effective pulse width threshold.
- the step of increasing at least one effective pulse width of the light emitting control signal includes:
- At least one of the at least two adjacent effective pulse widths is increased so that at least one of the at least two adjacent effective pulse widths is greater than a first effective pulse width threshold.
- the step of increasing at least one effective pulse width of the light emitting control signal includes:
- all effective pulse widths of the light emitting control signal are increased so that all effective pulse widths of the light emitting control signal are greater than a first effective pulse width threshold.
- the step of lowering at least one effective pulse width of the light emitting control signal includes:
- At least one of the at least two adjacent effective pulse widths is lowered so that at least one of the at least two adjacent effective pulse widths is less than a second effective pulse width threshold.
- the step of lowering at least one effective pulse width of the light emitting control signal includes:
- all effective pulse widths of the light emitting control signal are lowered so that all effective pulse widths of the light emitting control signal are smaller than a second effective pulse width threshold.
- the pulse width modulation method includes:
- At least one effective pulse width of the light-emitting control signal is increased so that within the first N frame times, at least one effective pulse width of the light-emitting control signal is greater than a third effective pulse width threshold; N is a positive integer.
- the step of increasing at least one effective pulse width of the light emitting control signal within the first N frame times includes:
- At least one of the at least two adjacent effective pulse widths is increased so that at least one of the at least two adjacent effective pulse widths is greater than a third effective pulse width threshold.
- the step of increasing at least one effective pulse width of the light emitting control signal within the first N frame times includes:
- the pulse width modulation method described in at least one embodiment of the present disclosure further includes:
- the effective pulse width of the light emitting control signal is restored to the predetermined pulse width.
- an embodiment of the present disclosure provides a pulse width modulation module, which is applied to a display panel, wherein the display panel includes a pixel circuit, the pixel circuit is connected to a light emitting control signal, and is used to control a light emitting element to emit light under the control of the light emitting control signal; a display cycle includes a refresh frame and a hold frame; the pulse width modulation module includes a pulse width modulation circuit;
- the pulse width modulation circuit is used to increase at least one effective pulse width of the light emitting control signal in the refresh frame so that at least one effective pulse width of the light emitting control signal is greater than a first effective pulse width threshold; and/or,
- the pulse width modulation circuit is used for reducing at least one effective pulse width of the light emitting control signal in the holding frame so that at least one effective pulse width of the light emitting control signal is smaller than a second effective pulse width threshold.
- the pulse width regulation circuit when used to increase at least one effective pulse width of the light-emitting control signal in the refresh frame, the pulse width regulation circuit is specifically used to increase at least one of the at least two adjacent effective pulse widths of the light-emitting control signal in the refresh frame, so that at least one of the at least two adjacent effective pulse widths is greater than a first effective pulse width threshold.
- the pulse width regulation circuit when used to increase at least one effective pulse width of the light-emitting control signal in the refresh frame, the pulse width regulation circuit is specifically used to increase all effective pulse widths of the light-emitting control signal in the refresh frame so that all effective pulse widths of the light-emitting control signal are greater than a first effective pulse width threshold.
- the pulse width regulation circuit when used to lower at least one effective pulse width of the light-emitting control signal in the holding frame, the pulse width regulation circuit is specifically used to lower at least one of the at least two adjacent effective pulse widths of the light-emitting control signal in the holding frame, so that at least one of the at least two adjacent effective pulse widths is less than a second effective pulse width threshold.
- the pulse width regulation circuit when used to lower at least one effective pulse width of the light-emitting control signal in the holding frame, the pulse width regulation circuit is specifically used to lower all effective pulse widths of the light-emitting control signal in the holding frame so that all effective pulse widths of the light-emitting control signal are smaller than a second effective pulse width threshold.
- the pulse width regulation module is also used to increase at least one effective pulse width of the light-emitting control signal within the first N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, so that within the first N frame times, at least one effective pulse width of the light-emitting control signal is greater than a third effective pulse width threshold; N is a positive integer.
- the pulse width regulation module when the pulse width regulation module is also used to increase at least one effective pulse width of the light emitting control signal within the first N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, the pulse width regulation module is specifically used to increase at least one effective pulse width of the at least two adjacent effective pulse widths of the light emitting control signal within the first N frame times, so that at least one effective pulse width of the at least two adjacent effective pulse widths is greater than a third effective pulse width threshold.
- the pulse width regulation module when the pulse width regulation module is also used to increase at least one effective pulse width of the light-emitting control signal within the first N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, the pulse width regulation module is specifically used to increase all effective pulse widths of the light-emitting control signal within the first N frame times, so that within the first N frame times, all effective pulse widths of the light-emitting control signal are greater than a third effective pulse width threshold.
- the pulse width modulation module is further used to restore the effective pulse width of the light emitting control signal to a predetermined pulse width after the initial N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency.
- an embodiment of the present disclosure provides a display device, comprising the above-mentioned pulse width modulation module.
- FIG. 1 is a circuit diagram of at least one embodiment of a pixel circuit included in a display panel
- FIG. 2 is a waveform diagram of a light emitting control signal provided by a light emitting control line EM in the related art
- FIG3 is a waveform diagram of the light emitting control signal in at least one embodiment of the present disclosure.
- FIG. 4 is a working timing diagram of at least one embodiment of the pixel circuit shown in FIG. 1 in at least one embodiment of the present disclosure
- FIG5 is a waveform diagram of the light emitting control signal in at least one embodiment of the present disclosure.
- FIG6 is a working timing diagram of at least one embodiment of the pixel circuit shown in FIG1 in at least one embodiment of the present disclosure
- FIG. 7 is a schematic diagram of a brightness curve before the pulse width modulation method according to at least one embodiment of the present disclosure is adopted when the display refresh frequency of the display panel is 10 Hz;
- FIG. 8 is a schematic diagram of a brightness curve after adopting the pulse width modulation method according to at least one embodiment of the present disclosure when the display refresh frequency of the display panel is 10 Hz;
- FIG. 9 is an operation timing diagram of at least one embodiment of the pixel circuit shown in FIG. 1 in at least one embodiment of the present disclosure.
- the transistors used in all embodiments of the present disclosure may be thin film transistors or field effect transistors or other devices with the same characteristics.
- one of the electrodes is called the first electrode and the other is called the second electrode.
- the first electrode when the transistor is a thin film transistor or a field effect transistor, the first electrode may be a drain electrode, and the second electrode may be a source electrode; or, the first electrode may be a source electrode, and the second electrode may be a drain electrode.
- the pulse width modulation method described in the embodiment of the present disclosure is applied to a display panel, wherein the display panel includes a pixel circuit, the pixel circuit is connected to a light emitting control signal, and is used to control a light emitting element to emit light under the control of the light emitting control signal; a display cycle includes a refresh frame and a hold frame; the pulse width modulation method includes:
- At least one effective pulse width of the light-emitting control signal is increased so that at least one effective pulse width of the light-emitting control signal is greater than a first effective pulse width threshold;
- At least one effective pulse width of the light-emitting control signal is lowered so that at least one effective pulse width of the light-emitting control signal is smaller than a second effective pulse width threshold.
- At least one effective pulse width of the light control signal is adjusted so that at least one effective pulse width of the light control signal is greater than a first effective pulse width threshold, and/or, in the hold frame, at least one effective pulse width of the light control signal is adjusted so that at least one effective pulse width of the light control signal is less than a second effective pulse width threshold, so that in the refresh frame, the light emitting brightness of the light emitting element is approximately equal to the light emitting brightness of the light emitting element in the hold frame, so as to improve the display flicker phenomenon.
- the light emitting brightness of the light emitting element in the refresh frame is substantially equal to the light emitting brightness of the light emitting element in the hold frame, which may refer to:
- the light emitting brightness of the light emitting element is equal to the light emitting brightness of the light emitting element in the hold frame;
- the absolute value of the difference between the luminance of the light-emitting element and the luminance of the light-emitting element in the hold frame is less than a predetermined brightness difference, and the predetermined brightness difference is greater than 0; the predetermined brightness difference can be selected according to actual conditions.
- the pulse width regulation method described in the embodiment of the present disclosure in the refresh frame, at least one effective pulse width of the light-emitting control signal is adjusted, and/or, in the hold frame, at least one effective pulse width of the light-emitting control signal is adjusted, so that the light-emitting brightness of the light-emitting element is roughly equal in the refresh frame and the hold frame.
- the display cycle when displaying at a low frequency, may include a refresh frame and at least one hold frame arranged after the refresh frame.
- the display refresh frequency of the display panel is less than or equal to 40 Hz, the display panel displays at a low frequency, but is not limited to this.
- the effective pulse width of the light emitting control signal refers to: the time when the potential of the light emitting control signal continues to be an effective voltage
- the effective voltage When the transistor controlled by the light emitting control signal is a p-type transistor, the effective voltage may be a low voltage, and when the transistor controlled by the light emitting control signal is an n-type transistor, the effective voltage may be a high voltage;
- At least one embodiment of a pixel circuit included in the display panel 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, a storage capacitor Cst, and an organic light emitting diode O1;
- the gate of T1 is electrically connected to the first reset line RN
- the gate of T2 is electrically connected to the first scan line GN
- T3 is a driving transistor
- the gate of T4 is electrically connected to the second scan line GP
- the gates of T5 and T6 are electrically connected to the light emitting control line EM
- the gate of T7 is electrically connected to the second reset line RP;
- the light emitting control line EM is used to provide a light emitting control signal
- T5 is the first light emitting control transistor
- T6 is the second light emitting control transistor
- T5 and T6 are p-type transistors, and the effective voltage is a low voltage.
- all transistors are p-type transistors, but the present invention is not limited thereto.
- ELVDD is a power supply voltage terminal
- Vd is a data voltage
- N1 is a first node
- Vi1 is a first initial voltage
- Vi2 is a second initial voltage
- ELVSS is a low voltage terminal.
- the effective pulse width of the light emitting control signal provided by the light emitting control line EM is a predetermined pulse width W0 .
- At least one effective pulse width of the light-emitting control signal can be increased in a refresh frame so that in the refresh frame, at least one effective pulse width of the light-emitting control signal is greater than a first effective pulse width threshold, so as to control the light-emitting brightness of the light-emitting element to be approximately equal in the refresh frame and the hold frame.
- the first effective pulse width threshold may be greater than or equal to the predetermined pulse width.
- the effective pulse width of the light control signal is consistent in the refresh frame and the hold frame.
- the brightness is lower in the refresh frame and higher in the hold frame, resulting in a flickering problem.
- at least one embodiment of the present disclosure can improve the low-frequency flickering phenomenon by increasing at least one effective pulse width of the light control signal in the refresh frame.
- the first effective pulse width W1 of the light emitting control signal provided by EM can be increased so that the first effective pulse width W1 of the light emitting control signal is greater than the first effective pulse width threshold.
- only one effective pulse width of the light-emitting control signal may be increased, or, among every at least two adjacent effective pulse widths of the light-emitting control signal, at least one effective pulse width of the at least two adjacent effective pulse widths may be increased; or, all effective pulse widths of the light-emitting control signal may be increased, but not limited thereto.
- the step of increasing at least one effective pulse width of the light emitting control signal includes:
- At least one of the at least two adjacent effective pulse widths is increased so that at least one of the at least two adjacent effective pulse widths is greater than a first effective pulse width threshold.
- the step of increasing at least one effective pulse width of the light emitting control signal comprises:
- all effective pulse widths of the light emitting control signal are increased so that in the refresh frame, all effective pulse widths of the light emitting control signal are greater than a first effective pulse width threshold.
- FIG. 4 is an operation timing diagram of at least one embodiment of the pixel circuit shown in FIG. 1 in at least one embodiment of the present disclosure.
- the frame labeled Ts is a refresh frame
- the frame labeled Tb is a hold frame.
- the first effective pulse width W1 of the light emitting control signal provided by the EM is greater than the first effective pulse width threshold, and the nth effective pulse width Wn of the light emitting control signal provided by the EM is greater than the first effective pulse width threshold; n is a positive integer greater than 1;
- the effective pulse width of the light emitting control signal provided by EM is the predetermined pulse width W0.
- the first effective pulse width threshold may be a predetermined pulse width W0 , W1 is greater than W0 , and Wn is greater than W0 , but the present invention is not limited thereto.
- the first effective pulse width threshold may be a predetermined pulse width, or the first effective pulse width threshold may be greater than the predetermined pulse width.
- At least one effective pulse width of the light control signal in the holding frame, can be lowered so that in the holding frame, at least one effective pulse width of the light control signal is smaller than a second effective pulse width threshold, so as to control the light brightness of the light emitting element to be approximately equal in the refresh frame and the holding frame.
- the second effective pulse width threshold may be less than or equal to the predetermined pulse width.
- the effective pulse width of the light control signal is consistent in the refresh frame and the hold frame.
- the brightness is lower in the refresh frame and higher in the hold frame, resulting in a flickering problem.
- at least one embodiment of the present disclosure can improve the low-frequency flickering phenomenon by lowering at least one effective pulse width of the light control signal in the hold frame.
- the fourth effective pulse width W4 of the light emitting control signal provided by EM can be increased so that the fourth effective pulse width W4 of the light emitting control signal is smaller than the second effective pulse width threshold.
- only one effective pulse width of the light-emitting control signal can be lowered, or, among every at least two adjacent effective pulse widths of the light-emitting control signal, at least one effective pulse width of the at least two adjacent effective pulse widths can be lowered; or, all effective pulse widths of the light-emitting control signal can be lowered, but not limited to this.
- the step of lowering at least one effective pulse width of the light emitting control signal includes:
- At least one of the at least two adjacent effective pulse widths is lowered so that in the holding frame, at least one of the at least two adjacent effective pulse widths is less than a second effective pulse width threshold.
- the step of lowering at least one effective pulse width of the light emitting control signal includes:
- FIG. 6 is an operation timing diagram of at least one embodiment of the pixel circuit shown in FIG. 1 in at least one embodiment of the present disclosure.
- the frame labeled Ts is a refresh frame
- the frame labeled Tb is a hold frame.
- the first effective pulse width W1 of the light emitting control signal provided by EM is less than the second effective pulse width threshold, and the nth effective pulse width Wn of the light emitting control signal provided by EM is less than the second effective pulse width threshold;
- the effective pulse width of the light emitting control signal provided by EM is the predetermined pulse width W0.
- the first effective pulse width threshold may be a predetermined pulse width W0 , W1 is smaller than W0 , and Wn is smaller than W0 , but the present invention is not limited thereto.
- the second effective pulse width threshold may be a predetermined pulse width, or the second effective pulse width threshold may be smaller than the predetermined pulse width.
- At least one embodiment of the present disclosure can set a light-emitting control signal with multiple effective pulse widths, and perform offset (compensation) adjustment on the effective pulse width of the light-emitting control signal at different frame times to achieve Flicker optimization, ensure the consistency of the overall brightness, thereby improving Flicker and achieving low-frequency display without flicker.
- the effective pulse width of the light emitting control signal can be adjusted within a range of about ⁇ 30%, thereby achieving uniform display brightness by adjusting the light emitting control signal and achieving an effect in which the flicker is invisible to the naked eye.
- Adjusting the effective pulse width of the light emitting control signal to an adjustment range of about ⁇ 30% may refer to:
- the effective pulse width of the light emitting control signal may be about 0.7W0;
- the effective pulse width of the light emitting control signal may be about 1.3W0, wherein W0 is a predetermined pulse width;
- the display refresh frequency of the display panel is 10 Hz
- the pulse width modulation method described in at least one embodiment of the present disclosure is adopted, the brightness curve is shown in FIG. 7 ;
- the brightness curve is as shown in FIG. 8 .
- the horizontal axis represents time t, and the unit is s (seconds), and the vertical axis represents brightness, and the unit is nit (nit).
- the flicker effect is improved from -27 dB to -37 dB.
- the pulse width modulation method includes:
- At least one effective pulse width of the light-emitting control signal is increased so that within the first N frame times, at least one effective pulse width of the light-emitting control signal is greater than a third effective pulse width threshold; N is a positive integer.
- the third effective pulse width threshold may be the predetermined pulse width, or the third effective pulse width threshold may be greater than the effective pulse width.
- the OLED (organic light emitting diode) display module has increasingly higher requirements for image quality and screen refresh rate, but high refresh rate is accompanied by high power consumption, so it is required to switch to a low refresh rate to reduce power consumption when a high refresh rate is not needed, but in the process of switching frequencies, frequency switching flicker often occurs inevitably.
- at least one embodiment of the present disclosure increases at least one effective pulse width of the light control signal within the first N frame time after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, so as to improve the frequency switching flicker phenomenon.
- only one effective pulse width of the light-emitting control signal can be increased, or, among every at least two adjacent effective pulse widths of the light-emitting control signal, at least one effective pulse width of the at least two adjacent effective pulse widths can be increased; or, all effective pulse widths of the light-emitting control signal can be increased, but not limited to this.
- the step of increasing at least one effective pulse width of the light emitting control signal within the first N frame times includes:
- At least one of the at least two adjacent effective pulse widths is adjusted higher, so that during the first N frame times, at least one of the at least two adjacent effective pulse widths is greater than the third effective pulse width threshold.
- the step of increasing at least one effective pulse width of the light emitting control signal within the first N frame times includes:
- the effective pulse width of the light emitting control signal is restored to the predetermined pulse width.
- FIG. 9 is an operation timing diagram of at least one embodiment of the pixel circuit shown in FIG. 1 in at least one embodiment of the present disclosure.
- the display refresh frequency of the display panel is 120 Hz
- the display refresh frequency of the display panel is 10 Hz
- the effective pulse width of the light emitting control signal is a predetermined pulse width W0;
- the first effective pulse width W1 of the light emitting control signal is greater than the third effective pulse width threshold, and the nth effective pulse width Wn of the light emitting control signal is greater than the third effective pulse width threshold.
- the first display period F1 may include at least one frame time
- the second display period F2 may include one frame time, but the present invention is not limited thereto.
- the second display period F2 may also include at least one frame time.
- n is less than N.
- the third effective pulse width threshold may be the predetermined pulse width W0, but is not limited thereto. In actual operation, the third effective pulse width threshold may also be greater than the predetermined pulse width W0.
- the effective pulse width of the light-emitting control signal can be increased within the first frame time, so that the effective pulse width of the light-emitting control signal is greater than the third effective pulse width threshold, but not limited to this.
- at least one effective pulse width of the light-emitting control signal can be increased within at least one frame time at the beginning.
- the pulse width modulation module described in the embodiment of the present disclosure is applied to a display panel, wherein the display panel includes a pixel circuit, the pixel circuit is connected to a light emitting control signal, and is used to control the light emitting element to emit light under the control of the light emitting control signal; the display cycle includes a refresh frame and a hold frame; the pulse width modulation module includes a pulse width modulation circuit;
- the pulse width regulation circuit is used to increase at least one effective pulse width of the light control signal in the refresh frame so that at least one effective pulse width of the light control signal is greater than a first effective pulse width threshold; and/or, the pulse width regulation circuit is used to decrease at least one effective pulse width of the light control signal in the hold frame so that at least one effective pulse width of the light control signal is less than a second effective pulse width threshold; so that in the refresh frame, the light emitting brightness of the light emitting element is approximately equal to the light emitting brightness of the light emitting element in the hold frame, so as to improve the display flicker phenomenon.
- the pulse width modulation circuit is used to increase at least one effective pulse width of the light-emitting control signal in the refresh frame so that at least one effective pulse width of the light-emitting control signal is greater than a first effective pulse width threshold.
- the pulse width regulation circuit when used to increase at least one effective pulse width of the light-emitting control signal in the refresh frame, the pulse width regulation circuit is specifically used to increase at least one effective pulse width of the at least two adjacent effective pulse widths of the light-emitting control signal in the refresh frame, so that at least one effective pulse width of the at least two adjacent effective pulse widths is greater than a first effective pulse width threshold.
- the pulse width regulation circuit when used to increase at least one effective pulse width of the light-emitting control signal in the refresh frame, the pulse width regulation circuit is specifically used to increase all effective pulse widths of the light-emitting control signal in the refresh frame so that all effective pulse widths of the light-emitting control signal are greater than a first effective pulse width threshold.
- the pulse width modulation circuit is used to lower at least one effective pulse width of the light-emitting control signal in the holding frame so that at least one effective pulse width of the light-emitting control signal is smaller than a second effective pulse width threshold.
- the pulse width regulation circuit when used to lower at least one effective pulse width of the light-emitting control signal in the holding frame, the pulse width regulation circuit is specifically used to lower at least one effective pulse width of the at least two adjacent effective pulse widths of the light-emitting control signal in the holding frame, so that at least one effective pulse width of the at least two adjacent effective pulse widths is less than a second effective pulse width threshold.
- the pulse width modulation circuit when used to lower at least one effective pulse width of the light control signal in the holding frame, the pulse width modulation circuit is specifically used to lower all effective pulse widths of the light control signal in the holding frame so that all effective pulse widths of the light control signal are less than the second effective pulse width threshold.
- the pulse width modulation circuit is used to increase at least one effective pulse width of the light control signal in the refresh frame so that at least one effective pulse width of the light control signal in the refresh frame is greater than the first effective pulse width threshold, and to lower at least one effective pulse width of the light control signal in the holding frame so that at least one effective pulse width of the light control signal in the holding frame is less than the second effective pulse width threshold.
- the pulse width regulation module is also used to increase at least one effective pulse width of the light-emitting control signal within the first N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, so that within the first N frame times, at least one effective pulse width of the light-emitting control signal is greater than a third effective pulse width threshold; N is a positive integer.
- the pulse width regulation module is also used to restore the effective pulse width of the light control signal to a predetermined pulse width after the initial N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency.
- the pulse width regulation module when the pulse width regulation module is also used to increase at least one effective pulse width of the light-emitting control signal within the initial N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, the pulse width regulation module is specifically used to increase at least one effective pulse width of the at least two adjacent effective pulse widths of the light-emitting control signal within the initial N frame times, so that at least one effective pulse width of the at least two adjacent effective pulse widths is greater than a third effective pulse width threshold.
- the pulse width regulation module when the pulse width regulation module is also used to increase at least one effective pulse width of the light-emitting control signal within the first N frame times after the display refresh frequency of the display panel is reduced from the first frequency to the second frequency, the pulse width regulation module is specifically used to increase all effective pulse widths of the light-emitting control signal within the first N frame times, so that within the first N frame times, all effective pulse widths of the light-emitting control signal are greater than the third effective pulse width threshold.
- the display device described in the embodiment of the present disclosure includes the above-mentioned pulse width modulation module.
- the display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like.
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Abstract
一种脉宽调节方法、脉宽调节模组和显示装置。脉宽调节方法应用于显示面板，显示面板包括像素电路，像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件（O1）发光；显示周期包括刷新帧（Ts）和保持帧（Tb）；脉宽调节方法包括:在刷新帧（Ts），调高发光控制信号的至少一有效脉宽（W1），以使得发光控制信号的至少一有效脉宽（W1）大于第一有效脉宽阈值（W0）；和/或，在所述保持帧（Tb），调低发光控制信号的至少一有效脉宽（W1），以使得发光控制信号的至少一有效脉宽（W1）小于第二有效脉宽阈值（W0）。能够改善显示闪烁现象。
Description
本公开涉及显示技术领域，尤其涉及一种脉宽调节方法、脉宽调节模组和显示装置。
在相关的显示面板中，一般发光控制信号的有效脉宽等宽，但是由于TFT(薄膜晶体管)和timing(时序)设定，无法保证显示面板的亮度均一，进而由于较大的亮度差异将导致Flicker(闪烁)的产生。
发明内容
在一个方面中，本公开实施例提供了一种脉宽调节方法，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节方法包括：
在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，
在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
可选的，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽步骤包括：
在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
可选的，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽步骤包括：
在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
可选的，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：
在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
可选的，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：
在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。
可选的，所述脉宽调节方法包括：
在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至少一有效脉宽大于第三有效脉宽阈值；N为正整数。
可选的，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：
在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第三有效脉宽阈值。
可选的，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：
在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于第三有效脉宽阈值。
可选的，本公开至少一实施例所述的脉宽调节方法还包括：
在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
在第二个方面中，本公开实施例提供一种脉宽调节模组，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在 发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节模组包括脉宽调节电路；
所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，
所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
可选的，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
可选的，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
可选的，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
可选的，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。
可选的，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至 少一有效脉宽大于第三有效脉宽阈值；N为正整数。
可选的，当所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第三有效脉宽阈值。
可选的，当所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于第三有效脉宽阈值。
可选的，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
在第三个方面中，本公开实施例提供一种显示装置，包括上述的脉宽调节模组。
图1是显示面板包括的像素电路的至少一实施例的电路图；
图2是在相关技术中，发光控制线EM提供的发光控制信号的波形图；
图3是在本公开至少一实施例中，所述发光控制信号的波形图；
图4是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图；
图5是在本公开至少一实施例中，所述发光控制信号的波形图；
图6是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图；
图7是当显示面板的显示刷新频率为10Hz时，在采用本公开至少一实施例所述的脉宽调节方法之前的亮度曲线示意图；
图8是当显示面板的显示刷新频率为10Hz时，在采用本公开至少一实施例所述的脉宽调节方法之后的亮度曲线示意图；
图9是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图。
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
本公开所有实施例中采用的晶体管均可以为薄膜晶体管或场效应管或其他特性相同的器件。在本公开实施例中，为区分晶体管除栅极之外的两极，将其中一极称为第一极，另一极称为第二极。
在实际操作时，当所述晶体管为薄膜晶体管或场效应管时，所述第一极可以为漏极，所述第二极可以为源极；或者，所述第一极可以为源极，所述第二极可以为漏极。
本公开实施例所述的脉宽调节方法，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节方法包括：
在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，
在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
在本公开至少一实施例中，在所述刷新帧，调节所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值，和/或，在所述保持帧，调节所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值，从而使得在所述刷新帧，所述发光元件的发光亮度，与在所述保持帧，所述发光元 件的发光亮度大致相等，以改善显示闪烁现象。
在本公开至少一实施例中，在所述刷新帧，所述发光元件的发光亮度，与在所述保持帧，所述发光元件的发光亮度大致相等指的可以是：
在所述刷新帧，所述发光元件的发光亮度，与在所述保持帧，所述发光元件的发光亮度相等；或者，
在所述刷新帧，所述发光元件的发光亮度，与在所述保持帧，所述发光元件的发光亮度之间的差值的绝对值小于预定亮度差值，所述预定亮度差值大于0；所述预定亮度差值可以根据实际情况选定。
在本公开实施例所述的脉宽调节方法中，在刷新帧，调节所述发光控制信号的至少一有效脉宽，和/或，在保持帧，调节所述发光控制信号的至少一有效脉宽，控制在刷新帧和保持帧，所述发光元件的发光亮度大致相等。
在具体实施时，在低频显示时，显示周期可以包括刷新帧和设置于所述刷新帧之后的至少一个保持帧，例如，当所述显示面板的显示刷新频率小于等于40Hz时，所述显示面板低频显示，但不以此为限。
在本公开至少一实施例中，所述发光控制信号的有效脉宽指的是：当所述发光控制信号的电位持续为有效电压的时间；
当所述发光控制信号控制的晶体管为p型晶体管时，所述有效电压可以为低电压，当所述发光控制信号控制的晶体管为n型晶体管时，所述有效电压可以为高电压；
但不以此为限。
在本公开至少一实施例中，如图1所示，所述显示面板包括的像素电路的至少一实施例包括第一晶体管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、存储电容Cst和有机发光二极管O1；
T1的栅极与第一复位线RN电连接，T2的栅极与第一扫描线GN电连接，T3为驱动晶体管，T4的栅极与第二扫描线GP电连接，T5的栅极和T6的栅极与发光控制线EM电连接，T7的栅极与第二复位线RP电连接；
所述发光控制线EM用于提供发光控制信号；
其中，T5为第一发光控制晶体管，T6为第二发光控制晶体管。
在图1所示的像素电路的至少一实施例中，T5和T6为p型晶体管，有效电压为低电压。
在图1所示的像素电路的至少一实施例中，所有晶体管都为p型晶体管，但不以此为限。
在图1中，ELVDD为电源电压端，Vd为数据电压，N1为第一节点，Vi1为第一初始电压，Vi2为第二初始电压，ELVSS为低电压端。
如图2所示，在相关技术中，发光控制线EM提供的发光控制信号的有效脉宽为预定脉宽W0。
在具体实施时，可以在刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得在所述刷新帧，所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值，以控制在刷新帧和保持帧，所述发光元件的发光亮度大致相等。
在具体实施时，所述第一有效脉宽阈值可以大于等于所述预定脉宽。
在相关技术中，在刷新帧和保持帧，发光控制信号的有效脉宽都一致，在低频显示时会出现在刷新帧亮度较低，在保持帧亮度较高，从而出现闪烁现象的问题，基于此，本公开至少一实施例可以通过在刷新帧，调高所述发光控制信号的至少一有效脉宽，以改善低频闪烁现象。
如图3所示，可以在刷新帧Ts，调高EM提供的发光控制信号的第一个有效脉宽W1，以使得所述发光控制信号的第一个有效脉宽W1大于第一有效脉宽阈值。
在具体实施时，在刷新帧，可以仅调高发光控制信号的一个有效脉宽，或者，可以在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽；或者，可以调高发光控制信号的所有的有效脉宽，但不以此为限。
可选的，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽步骤包括：
在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
可选的，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽 步骤包括：
在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得在刷新帧，所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
图4是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图。
在图4中，标号为Ts的为刷新帧，标号为Tb的为保持帧。
如图4所示，在刷新帧Ts，EM提供的发光控制信号的第一个有效脉宽W1大于第一有效脉宽阈值，EM提供的发光控制信号的第n个有效脉宽Wn大于第一有效脉宽阈值；n为大于1的正整数；
在保持帧Tb，EM提供的发光控制信号的有效脉宽都为预定脉宽W0。
在图4所示的至少一实施例中，所述第一有效脉宽阈值都可以为预定脉宽W0，W1大于W0，Wn大于W0，但不以此为限。
在本公开至少一实施例中，所述第一有效脉宽阈值可以为预定脉宽，或者，所述第一有效脉宽阈值可以大于所述预定脉宽。
在具体实施时，可以在保持帧，调低所述发光控制信号的至少一有效脉宽，以使得在所述保持帧，所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值，以控制在刷新帧和保持帧，所述发光元件的发光亮度大致相等。
在具体实施时，所述第二有效脉宽阈值可以小于等于所述预定脉宽。
在相关技术中，在刷新帧和保持帧，发光控制信号的有效脉宽都一致，在低频显示时会出现在刷新帧亮度较低，在保持帧亮度较高，从而出现闪烁现象的问题，基于此，本公开至少一实施例可以通过在保持帧，调低所述发光控制信号的至少一有效脉宽，以改善低频闪烁现象。
如图5所示，可以在刷新帧Ts，调高EM提供的发光控制信号的第四个有效脉宽W4，以使得所述发光控制信号的第四个有效脉宽W4小于第二有效脉宽阈值。
在具体实施时，在保持帧，可以仅调低发光控制信号的一个有效脉宽，或者，可以在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽；或者，可以调低发光控制信号的所有的有效脉宽，但不以此为限。
可选的，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：
在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得在所述保持帧，该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
可选的，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：
在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得在所述保持帧，所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。
图6是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图。
在图6中，标号为Ts的为刷新帧，标号为Tb的为保持帧。
如图6所示，在保持帧Tb，EM提供的发光控制信号的第一个有效脉宽W1小于第二有效脉宽阈值，EM提供的发光控制信号的第n个有效脉宽Wn小于第二有效脉宽阈值；
在刷新帧Ts，EM提供的发光控制信号的有效脉宽都为预定脉宽W0。
在图6所示的至少一实施例中，所述第一有效脉宽阈值都可以为预定脉宽W0，W1小于W0，Wn小于W0，但不以此为限。
在本公开至少一实施例中，所述第二有效脉宽阈值可以为预定脉宽，或者，所述第二有效脉宽阈值可以小于所述预定脉宽。
本公开至少一实施例可以设置具有多有效脉宽的发光控制信号，在不同帧时间下的发光控制信号的有效脉宽进行offset(补偿)调整，实现Flicker(闪烁)优化，保证整体亮度的一致性，从而改善Flicker，可以实现低频显示不闪烁。
在本公开至少一实施例中，调节所述发光控制信号的有效脉宽的调整范围可以在±30％左右，从而通过调节发光控制信号而实现显示亮度均一化，达到闪烁肉眼不可见的效果。
调节所述发光控制信号的有效脉宽的调整范围在±30％左右指的可以是：
当需要调低所述发光控制信号的有效脉宽时，所述发光控制信号的有效 脉宽可以为0.7W0左右；
当需要调高所述发光控制信号的有效脉宽时，所述发光控制信号的有效脉宽可以为1.3W0左右；其中，W0为预定脉宽；
但不以此为限。
当显示面板的显示刷新频率为10Hz时，在采用本公开至少一实施例所述的脉宽调节方法之前，亮度曲线如图7所示；
当显示面板的显示刷新频率为10Hz时，在采用本公开至少一实施例所述的脉宽调节方法之后，亮度曲线如图8所示。
在图7和图8中，横轴为时间t，单位为s(秒)，纵轴为亮度，单位为nit(尼特)。
经过比较图7和图8，通过采用本公开至少一实施例所述的脉宽调节方法，flicker效果由-27dB提升至-37dB。
在本公开至少一实施例中，所述脉宽调节方法包括：
在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至少一有效脉宽大于第三有效脉宽阈值；N为正整数。
可选的，所述第三有效脉宽阈值可以为所述预定脉宽，或者，第三有效脉宽阈值可以大于所述有效脉宽。
在相关技术中，OLED(有机发光二极管)显示模组对画质要求越来越高，对屏幕的刷新率有更高的要求，但高刷新率伴随着高功耗，于是要求在不需要高刷新率的时候，切换低刷新率以减小功耗，但是在切换频率的过程中，往往无可避免的出现频率切换闪烁。基于此，本公开至少一实施例在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以改善切频闪烁现象。
在具体实施时，所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，可以仅调高发光控制信号的一个有效脉宽，或者，可以在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽；或者，可以调高发光控制信号的 所有的有效脉宽，但不以此为限。
可选的，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：
在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得在最开始的N帧时间内，该至少两个相邻的有效脉宽中的至少一个有效脉宽大于所述第三有效脉宽阈值。
可选的，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：
在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于所述第三有效脉宽阈值。
本公开至少一实施例所述的脉宽调节方法还包括：
在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
图9是在本公开至少一实施例中，图1所示的像素电路的至少一实施例的工作时序图。
如图9所示，在第一显示周期F1，所述显示面板的显示刷新频率为120Hz，在第二显示周期F2，所述显示面板的显示刷新频率为10Hz；
在第一显示周期F1，所述发光控制信号的有效脉宽为预定脉宽W0；
在第二显示周期F2，所述发光控制信号的第一个有效脉宽W1大于第三有效脉宽阈值，所述发光控制信号的第n个有效脉宽Wn大于第三有效脉宽阈值。
在图9所示的至少一实施例中，所述第一显示周期F1可以包括至少一帧时间，所述第二显示周期F2可以包括一帧时间，但不以此为限。在实际操作时，所述第二显示周期F2也可以包括至少一帧时间。
在图9所示的至少一实施例中，n小于N。
在图9所示的至少一实施例中，所述第三有效脉宽阈值可以为所述预定脉宽W0，但不以此为限。在实际操作时，所述第三有效脉宽阈值也可以大于 所述预定脉宽W0。
在具体实施时，当所述显示面板的显示刷新频率由120Hz降低为10Hz后，在第一帧刷新帧的显示亮度会变暗，紧随其后的保持帧，显示亮度会慢慢变亮，因此可以在显示刷新频率降低为10Hz后，在第一帧时间内，调高所述发光控制信号的有效脉宽，以使得该发光控制信号的有效脉宽大于第三有效脉宽阈值，但不以此为限。在实际操作时，可以在显示刷新频率降低为10Hz后，在最开始至少一帧时间内，调高所述发光控制信号的至少一有效脉宽。
本公开实施例所述的脉宽调节模组，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节模组包括脉宽调节电路；
所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值；以使得在所述刷新帧，所述发光元件的发光亮度，与在所述保持帧，所述发光元件的发光亮度大致相等，以改善显示闪烁现象。
可选的，所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值。
在具体实施时，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
在具体实施时，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
可选的，所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
在具体实施时，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
在具体实施时，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。可选的，所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得在所述刷新帧，所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值，并在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得在所述保持帧，所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
在本公开至少一实施例中，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至少一有效脉宽大于第三有效脉宽阈值；N为正整数。
在本公开至少一实施例中，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
在具体实施时，当所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第三有效脉宽阈值。
在具体实施时，当所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于第三有效脉宽阈值。
本公开实施例所述的显示装置包括上述的脉宽调节模组。
本公开实施例所提供的显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。
Claims (19)
- 一种脉宽调节方法，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节方法包括：在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
- 如权利要求1所述的脉宽调节方法，其中，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽步骤包括：在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
- 如权利要求1所述的脉宽调节方法，其中，所述在所述刷新帧，调高所述发光控制信号的至少一有效脉宽步骤包括：在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
- 如权利要求1所述的脉宽调节方法，其中，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
- 如权利要求1所述的脉宽调节方法，其中，所述在所述保持帧，调低所述发光控制信号的至少一有效脉宽步骤包括：在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。
- 如权利要求1至5中任一权利要求所述的脉宽调节方法，其中，所述脉宽调节方法包括：在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至少一有效脉宽大于第三有效脉宽阈值；N为正整数。
- 如权利要求6所述的脉宽调节方法，其中，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第三有效脉宽阈值。
- 如权利要求6所述的脉宽调节方法，其中，所述在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽步骤包括：在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于第三有效脉宽阈值。
- 如权利要求6所述的脉宽调节方法，其中，还包括：在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
- 一种脉宽调节模组，应用于显示面板，所述显示面板包括像素电路，所述像素电路接入发光控制信号，用于在发光控制信号的控制下控制发光元件发光；显示周期包括刷新帧和保持帧；所述脉宽调节模组包括脉宽调节电路；所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽大于第一有效脉宽阈值；和/或，所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽，以使得所述发光控制信号的至少一有效脉宽小于第二有效脉宽阈值。
- 如权利要求10所述的脉宽调节模组，其中，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调 节电路具体用于在所述刷新帧，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第一有效脉宽阈值。
- 如权利要求10所述的脉宽调节模组，其中，当所述脉宽调节电路用于在所述刷新帧，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述刷新帧，调高所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都大于第一有效脉宽阈值。
- 如权利要求10所述的脉宽调节模组，其中，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，在发光控制信号的每至少两个相邻的有效脉宽中，调低该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽小于第二有效脉宽阈值。
- 如权利要求10所述的脉宽调节模组，其中，当所述脉宽调节电路用于在所述保持帧，调低所述发光控制信号的至少一有效脉宽时，所述脉宽调节电路具体用于在所述保持帧，调低所述发光控制信号的所有的有效脉宽，以使得所述发光控制信号的所有的有效脉宽都小于第二有效脉宽阈值。
- 如权利要求10至14中任一权利要求所述的脉宽调节模组，其中，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的至少一有效脉宽大于第三有效脉宽阈值；N为正整数。
- 如权利要求15所述的脉宽调节模组，其中，当所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，在发光控制信号的每至少两个相邻的有效脉宽中，调高该至少两个相邻的有效脉宽中的至少一个有效脉宽，以使得该至少两个相邻的有效脉宽中的至少一个有效脉宽大于第三有效脉宽阈值。
- 如权利要求15所述的脉宽调节模组，其中，当所述脉宽调节模组还 用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间内，调高所述发光控制信号的至少一有效脉宽时，所述脉宽调节模组具体用于在最开始的N帧时间内，调高所述发光控制信号的所有的有效脉宽，以使得在最开始的N帧时间内，所述发光控制信号的所有的有效脉宽都大于第三有效脉宽阈值。
- 如权利要求15所述的脉宽调节模组，其中，所述脉宽调节模组还用于在所述显示面板的显示刷新频率由第一频率降低为第二频率后，在最开始的N帧时间之后，恢复所述发光控制信号的有效脉宽为预定脉宽。
- 一种显示装置，包括如权利要求10至18中任一权利要求所述的脉宽调节模组。
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| CN1339934A (zh) * | 2000-08-09 | 2002-03-13 | 夏普株式会社 | 图象显示装置和便携式电子装置 |
| US20150029238A1 (en) * | 2012-04-16 | 2015-01-29 | Samsung Display Co., Ltd. | Drive circuit, optoelectronic device, electronic device, and drive method |
| CN113241033A (zh) * | 2021-05-24 | 2021-08-10 | 厦门天马微电子有限公司 | 显示面板及驱动方法、控制主板及控制方法、显示装置 |
| CN114093330A (zh) * | 2021-11-05 | 2022-02-25 | 深圳Tcl数字技术有限公司 | 亮度调节方法、装置、显示设备及计算机可读存储介质 |
| CN114255707A (zh) * | 2020-09-25 | 2022-03-29 | 乐金显示有限公司 | 显示驱动电路及使用该显示驱动电路的显示装置 |
| CN114882831A (zh) * | 2022-05-13 | 2022-08-09 | 武汉华星光电半导体显示技术有限公司 | 一种显示面板的显示控制方法、显示模组及显示装置 |
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| CN1339934A (zh) * | 2000-08-09 | 2002-03-13 | 夏普株式会社 | 图象显示装置和便携式电子装置 |
| US20150029238A1 (en) * | 2012-04-16 | 2015-01-29 | Samsung Display Co., Ltd. | Drive circuit, optoelectronic device, electronic device, and drive method |
| CN114255707A (zh) * | 2020-09-25 | 2022-03-29 | 乐金显示有限公司 | 显示驱动电路及使用该显示驱动电路的显示装置 |
| CN113241033A (zh) * | 2021-05-24 | 2021-08-10 | 厦门天马微电子有限公司 | 显示面板及驱动方法、控制主板及控制方法、显示装置 |
| CN114093330A (zh) * | 2021-11-05 | 2022-02-25 | 深圳Tcl数字技术有限公司 | 亮度调节方法、装置、显示设备及计算机可读存储介质 |
| CN114882831A (zh) * | 2022-05-13 | 2022-08-09 | 武汉华星光电半导体显示技术有限公司 | 一种显示面板的显示控制方法、显示模组及显示装置 |
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