CN114927087A - Display panel driving method and display device - Google Patents
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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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]
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The display device performs dimming according to the driving method of the display panel, and when the display gray scale is lower than a set threshold value, the first driving signal is adjusted to be the second driving signal, the amplitude of the driving current is provided, the anti-interference capability of the driving current is improved, the pulse frequency of the driving current is reduced, the power of the driving current output to the light-emitting drive is ensured to be basically unchanged, and the display brightness is maintained to be basically unchanged. The driving method and the display device of the display panel effectively improve the anti-interference capability of the driving current during low-gray-scale display and improve the dimming precision.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method of a display panel and a display device.
Background
The backlight of the display device is generally an LED (light emitting diode), and the display brightness can be adjusted by adjusting the luminance of the LED, so as to adjust the gray scale brightness.
The dimming techniques of the light emitting diode can be roughly classified into two types: PWM (Pulse Width Modulation) Pulse Width dimming and PAM (Pulse Amplitude Modulation) Pulse Amplitude dimming.
Pulse width dimming adjusts LED brightness by converting gray scale data to a high-low level duty cycle that controls the LED turn-on signal pulses. The higher the ratio of the on-time to the off-time per unit time, i.e. the larger the pulse width, means that the higher the average current per unit time, the higher the LED display brightness, and vice versa.
Pulse amplitude dimming, i.e. current dimming, is a way of changing the magnitude of a current in an LED loop to change the pulse amplitude of a driving current received by an LED, thereby achieving the adjustment of the LED brightness, the larger the conduction current, the higher the pulse amplitude, and vice versa.
In the pulse amplitude dimming, the smaller the gray scale data is, the smaller the pulse amplitude of the driving current of the LED is, and the lower current has poor anti-interference capability, so that the driving current of the LED is easily influenced by any tiny fluctuation caused by devices or wires in an LED loop, and the current dimming precision is reduced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for driving a display panel of light emitting diodes and a display device, which can improve the dimming reliability and current dimming accuracy when the pulse width dimming is performed at a low gray level.
According to an aspect of the present invention, there is provided a driving method of a display panel, including: acquiring a to-be-displayed picture of a display panel, and determining the to-be-displayed brightness of each pixel according to the to-be-displayed picture; confirming the display gray scale corresponding to each pixel according to the display brightness of each pixel; confirming a first driving signal according to the display gray scale, and driving each pixel according to the first driving signal; comparing the display gray scale with a set threshold; and when the display gray scale is smaller than or equal to a set threshold, determining a second driving signal corresponding to the display gray scale, and driving each pixel according to the second driving signal, wherein the amplitude of the second driving signal corresponding to the same display gray scale is larger than that of the corresponding first driving signal, and the frequency of the second driving signal corresponding to the same display gray scale is smaller than that of the corresponding first driving signal.
Optionally, the integration areas of the second driving signal and the first driving signal corresponding to the same display gray scale in one display driving period are the same.
Optionally, the frequencies of the first driving signal and the second driving signal are obtained according to the product of the number of groups corresponding to the group signal and the frequency of the vertical synchronization signal; and adjusting the group number corresponding to the group signal by adjusting the group signal so as to adjust the frequency of the first driving signal and the second driving signal.
Optionally, the current amplitudes of the first and second drive signals are generated by a digital-to-analog converter.
Optionally, in the step of determining the second driving signal corresponding to the display gray scale, the method includes: and adjusting the ratio of the amplitude of the second driving signal corresponding to the same display gray scale to the amplitude of the corresponding first driving signal according to a preset proportion to obtain the second driving signal.
Optionally, the step of determining the second driving signal corresponding to the display gray scale further includes: the ratio of the amplitude of the second driving signal corresponding to the same display gray scale to the amplitude of the corresponding first driving signal is gradually increased according to a preset proportion; after each adjustment, comparing the frequency of the second drive signal with a preset frequency minimum threshold; and under the condition that the frequency of the second driving signal is smaller than the preset frequency lowest threshold, finishing the adjustment of the second driving signal and outputting the adjusted second driving signal.
Optionally, after a single adjustment, the amplitude of the second driving signal is twice that before the adjustment, and the frequency of the second driving signal is half that before the adjustment.
Optionally, a display panel comprising an array of light emitting diodes;
according to another aspect of the present invention, a dimming module is provided, which is used in any one of the above-mentioned driving methods for a display panel to control the light emitting brightness of each light emitting diode of the light emitting diode array, where the light emitting diodes correspond to the pixels one by one.
Optionally, the dimming module comprises: the pulse amplitude dimming module is used for adjusting the amplitude of the driving current provided to each light emitting diode of the light emitting diode array according to input gray scale data so as to adjust the brightness of each light emitting diode of the light emitting diode array; the dimming module is used for adjusting the pulse width of the driving current of each light emitting diode of the light emitting diode array according to input gray scale data so as to adjust the light emitting brightness of each light emitting diode of the light emitting diode array, wherein the dimming module also selects to perform dimming by adjusting the amplitude or the pulse width of the driving current according to a dimming mode control instruction, fixes the amplitude of the driving current when selecting to perform dimming by adjusting the pulse width of the driving current, and fixes the pulse width of the driving current when selecting to perform dimming by adjusting the amplitude of the driving current.
Optionally, the light emitting diode array comprises any one of mini light emitting diodes, micro light emitting diodes, quantum dot light emitting diodes, organic light emitting diodes.
According to another aspect of the present invention, a terminal device is provided, wherein the terminal device comprises the display apparatus.
According to the driving method of the display panel, when the display gray scale of the pixel is lower than the set threshold, the amplitude of the driving current is increased, the anti-interference capability of the driving current is improved, the pulse frequency of the driving current is reduced, the output power of the driving current is guaranteed to be basically unchanged, the light-emitting brightness of the light-emitting diode is kept to be basically unchanged, the anti-interference capability of the driving current during low-gray-scale display is effectively improved, and the dimming precision is improved.
The display device provided by the invention comprises a display panel and a dimming module, wherein the display panel comprises a light emitting diode array, the dimming module controls the light emitting brightness of each light emitting diode of the light emitting diode array according to the driving method of the display panel, the pulse amplitude of the driving current is improved in low gray scale, the pulse frequency of the driving current is reduced, and the improvement of the pulse amplitude effectively improves the anti-interference capability of the driving current under the condition of keeping the power of the driving current output to the light emitting diodes basically unchanged, so that the dimming precision of the low gray scale is improved.
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The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a flowchart illustrating a driving method of a display panel according to an embodiment of the present invention;
fig. 2 shows a schematic of a current pulse width modulation principle in a driving method of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram showing a regulation principle of a pulse frequency of a driving method of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating a state regulation of a driving current of a driving method of a display panel according to an embodiment of the present invention;
fig. 5 illustrates input and output curves of a digital-to-analog converter of a driving method of a display panel according to an embodiment of the present invention;
fig. 6 illustrates a driving current variation with gray scale according to a driving method of a display panel according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1 illustrates a flowchart of a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 1, the driving method of the display panel of the embodiment is applied to a display device, the display device is provided with a light emitting diode array for providing a backlight source, the brightness of each light emitting diode of the light emitting diode array can be adjusted according to gray scale data of a corresponding pixel, the light emitting diodes correspond to the pixels one by one, in an optional embodiment, the light emitting diodes correspond to a plurality of pixel regions, that is, the invention can also be applied to regional dimming. In this embodiment, the display device is provided with a pulse width dimming module and a pulse amplitude dimming module at the same time, and the driving method of the display panel includes:
step S10: and judging whether the current is dimmed. That is, it is determined whether the pulse width dimming mode or the pulse width dimming mode is selected according to the dimming mode control command.
In the pulse width dimming mode, according to the selection of the dimming mode, step S20 is performed: the amplitude of the driving current of the light emitting diode is fixed, and the backlight brightness is adjusted by adjusting the duty ratio of the pulse width modulation signal.
In this embodiment, the current source of the driving current is a digital-to-analog converter, and in step S20, the amplitude of the output current of the digital-to-analog converter is also fixed to the maximum value.
In the pulse-width dimming mode, step S30 is performed: and controlling the pulse width of the pulse width modulation signal to be unchanged, and adjusting the backlight brightness by adjusting the amplitude of the driving current.
In step S30, the dac adjusts the output current according to the input gray-scale data, thereby controlling the amplitude of the driving current.
In step S40, it is determined whether the input gray-scale data is low gray-scale data.
In step S40, comparing the input gray scale data with the preset low gray scale data, and performing step S50 when the input gray scale data is less than or equal to the preset low gray scale data; and when the input gray scale data is larger than the preset low gray scale data, ending the regulation and control process, and performing backlight driving according to the current output current of the digital-to-analog converter.
In the embodiment, the predetermined low gray level data is, for example, 10% of the maximum gray level, but the specific selection can be determined according to the actual requirement, which is not described in detail herein.
Step S50: the amplitude of the driving current is improved, and the pulse frequency of the driving current is reduced.
In step S50, the amplitude of the driving current is increased to increase the interference resistance of the driving current, and the pulse frequency of the driving current is decreased to maintain the equivalent driving force of the driving current in unit time, so that the interference resistance of current dimming is increased and the accuracy of current dimming is increased without changing the luminance of the light emitting diode.
In this embodiment, after a single adjustment, the amplitude of the driving current is twice that before the adjustment, the pulse frequency of the driving current is half that before the adjustment, and correspondingly, the preset low gray scale data is, for example, half that of the maximum gray scale, when the input gray scale data is half that of the maximum gray scale, the amplitude of the original driving current before the adjustment is half that of the maximum output amplitude of the digital-to-analog converter, and the amplitude of the driving current after the adjustment is adjusted to the maximum output amplitude of the digital-to-analog converter, so that the maximization of the amplitude of the driving current can be realized through one cycle, and the anti-interference capability of the driving current is maximized. In specific application, the amplitude of the driving current and the single adjustment amount of the pulse frequency are selected according to specific requirements, for example, the amplitude is 1.5 times of the amplitude before adjustment, the pulse frequency is 0.67 times of the pulse frequency before adjustment, the output power of the driving current in unit time is integrally guaranteed to be unchanged, the light-emitting driving force of the light-emitting diode in unit time is unchanged, the light-emitting brightness of the light-emitting diode is unchanged, and the anti-interference capability of the driving current is improved under the condition of maintaining the original light-emitting brightness.
In this embodiment, the refreshing of the input gray-scale data (the number of the input gray-scale data is consistent with that of the pixels, and one set of the input gray-scale data corresponds to the luminance information of each pixel of the display frame of one frame) is controlled according to the vertical synchronization signal, and one frame of the gray-scale data is refreshed at the end of each period of the vertical synchronization signal, so as to control the frame rate of the display frame.
The product of the frequency of the vertical synchronization signal and the corresponding group number of the group signal is used as the pulse frequency of the driving current (corresponding to the first driving signal before adjustment and the second driving signal after adjustment, and the obtained frequencies of the first driving signal and the second driving signal both correspond to the operation).
That is, the method for driving a display panel according to the present invention includes: acquiring a to-be-displayed picture of a display panel, and determining the to-be-displayed brightness of each pixel according to the to-be-displayed picture; confirming the display gray scale corresponding to each pixel according to the display brightness of each pixel; confirming a first driving signal according to the display gray scale, and driving each pixel according to the first driving signal; comparing the display gray scale with a set threshold; and when the display gray scale is less than or equal to the set threshold, determining a second driving signal corresponding to the display gray scale, and driving each pixel according to the second driving signal. The amplitude of the second driving signal corresponding to the same display gray scale is larger than that of the corresponding first driving signal, and the frequency of the second driving signal corresponding to the same display gray scale is smaller than that of the corresponding first driving signal.
Step S60: it is determined whether the pulse frequency of the driving current reaches a predetermined target.
In step S60, comparing the pulse frequency of the adjusted driving current with a preset minimum standard, wherein the standard is a frequency threshold of the second driving signal, and when the pulse frequency of the adjusted driving current is less than or equal to the preset minimum standard, considering that the preset target is reached, ending the adjustment, and performing backlight driving according to the amplitude and the pulse frequency of the adjusted driving current; when the pulse frequency of the adjusted driving current is greater than the preset minimum standard, it is considered that the amplitude of the driving current can be continuously increased, and the pulse frequency of the driving current can be continuously reduced, and the loop of the step S40, the step S50 and the step S60 is continuously executed, so that a higher amplitude of the driving current can be obtained, and the interference resistance can be improved.
The frequency of the vertical synchronization signal may fluctuate to some extent according to the actual usage of the display device, and the determination of step S60 is performed to detect the pulse frequency of the driving current, so as to effectively avoid the pulse frequency of the driving current being configured to a lower value when the frequency of the vertical synchronization signal is lower, ensure that the driving current can effectively output a certain power, and ensure the light emission driving of the LED.
Fig. 2 shows a schematic diagram of a current pulse width modulation principle in a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 2, the output current provided by the digital-to-analog converter adjusts the pulse width according to the pulse width modulation signal PWM, the obtained pulse width and frequency of the first current I1 are consistent with the pulse width and frequency of the pulse width modulation signal PWM, the pulse width and frequency of the first current I1 can be fixed by fixing the pulse width and frequency of the pulse width modulation signal PWM, and the pulse amplitude of the first current I1 can be reduced when the amplitude of the output current of the digital-to-analog converter is reduced along with the gray scale data gray.
Fig. 3 shows a regulation principle schematic of a pulse frequency of a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 3, the pulse frequency of the group signal is sequentially decreased as the number of groups is decreased in the order of GRP64, GRP32, GRP16, …, and GRP 1.
Wherein the frequency reduction is based on, for example, the maximum frequency of the first current I1 shown in fig. 2 as a base quantity, and a switch is further added to the output path, and the switch is controlled according to the group signal GRP.
Fig. 4 illustrates a state control diagram of a driving current of a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 4, the frequency is reduced while the amplitude of the second current I2 is increased, and the second current I2 is integrated over time within a certain time, so that the integrated areas are the same, even if the integrated areas of the second driving signal and the first driving signal corresponding to the same display gray scale in one display driving period are the same, the driving forces of the light emitting diodes before and after adjustment are the same, the brightness is the same, and the increase of the amplitude effectively improves the anti-interference capability.
Fig. 5 illustrates input and output curves of a digital-to-analog converter of a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 5, the actual amplitude of the output current I0 of the digital-to-analog converter corresponds to the piecewise curve in the a1 region (corresponding to the amplitude of the first driving signal), and when the input gray-scale data is smaller than the low gray-scale data g0, the actual output amplitude of the output current of the digital-to-analog converter (corresponding to the amplitude of the second driving signal, corresponding to the curve in the a2 region) is larger than the original output amplitude (corresponding to the curve in the B region, corresponding to the amplitude of the first driving signal).
In one embodiment, a first controller is provided to adjust a conversion configuration of the dac according to the first controller, and when the input gray-scale data is less than or equal to the low gray-scale data, a ratio of an output current amplitude of the dac to the input gray-scale data (corresponding to a slope of an a2 region curve) is increased, so that when the input gray-scale data is less than the low gray-scale data, the output current amplitude of the dac is increased.
The first driving signal is obtained according to an original gray scale-current correspondence, and when a display gray scale is smaller than or equal to a preset threshold, the ratio of the amplitude of the second driving signal corresponding to the same display gray scale to the amplitude of the corresponding first driving signal is adjusted according to a preset ratio on the basis of the first driving signal to obtain the second driving signal.
In this embodiment, the adjustment is performed multiple times according to the preset ratio and the first driving signal, and step S60 is further executed after each adjustment, so as to prevent the pulse frequency of the driving current from being configured to a lower value when the frequency of the vertical synchronization signal is lower, ensure that the driving current can effectively output a certain power, and ensure the light emitting driving of the LED.
Fig. 6 illustrates a driving current variation with gray scale according to a driving method of a display panel according to an embodiment of the present invention.
Referring to fig. 6, in this embodiment, the driving current received by the light emitting diode is tested, and as the gray scale data linearly changes, the output power of the driving current also linearly changes, and the emission brightness of the corresponding light emitting diode linearly changes with the input gray scale data.
In one embodiment, the mini LED of 96 channels is dimmed, each channel adopts 14-bit gray scale and 7-bit current dimming, the dynamic refresh rate of 30Hz to 1000Hz can be adapted, the actual display refresh rate up to 15K can be realized through a configured group display scheme, and the peak current is 1 to 30 mA.
It should be noted that the present invention can be applied to any one of micro Light Emitting Diodes (Mirco LEDs), Quantum Dot Light Emitting Diodes (QLEDs), and Organic Light-Emitting Diodes (OLEDs), besides the mini LED.
According to the driving method of the display panel, when the input gray scale data is low gray scale, the amplitude of the driving current is improved, the anti-interference capability of the driving current is improved, the pulse frequency of the driving current is reduced, the power of the driving current output to the light-emitting drive is guaranteed to be basically unchanged, the display brightness is maintained to be basically unchanged, the anti-interference capability of the driving current during low gray scale display is effectively improved, and the dimming precision is improved.
The invention also provides a display device, which comprises a display panel and a dimming module, wherein the display panel comprises a light emitting diode array, the dimming module comprises a pulse amplitude dimming module and a pulse width dimming module, the pulse amplitude dimming module is used for adjusting the pulse amplitude of the driving current of the light emitting diode, the pulse width dimming module is used for adjusting the pulse width of the driving current of the light emitting diode, and the dimming module controls the luminous brightness of each light emitting diode of the light emitting diode array according to the driving method of the display panel.
The invention further provides a terminal device, wherein the display device is installed on the terminal device, specifically, the terminal device can be any one of a smart phone, a vehicle-mounted computer, a tablet computer, a notebook computer, an intelligent wearable electronic device, an advertisement billboard and the like, and the invention is not limited to this.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (11)
1. A method of driving a display panel, comprising:
acquiring a to-be-displayed picture of a display panel, and determining the to-be-displayed brightness of each pixel according to the to-be-displayed picture;
confirming the display gray scale corresponding to each pixel according to the display brightness of each pixel;
confirming a first driving signal according to the display gray scale, and driving each pixel according to the first driving signal; and the number of the first and second groups,
comparing the display gray scale with a set threshold;
when the display gray scale is less than or equal to a set threshold, determining a second driving signal corresponding to the display gray scale, and driving each pixel according to the second driving signal, wherein,
the amplitude of the second driving signal corresponding to the same display gray scale is larger than that of the corresponding first driving signal, and the frequency of the second driving signal corresponding to the same display gray scale is smaller than that of the corresponding first driving signal.
2. The driving method of the display panel according to claim 1,
and the brightness of each pixel in one display driving period is consistent with that of each pixel in the second driving signal and the first driving signal corresponding to the same display gray scale.
3. The driving method of the display panel according to claim 1, further comprising:
obtaining the frequencies of the first driving signal and the second driving signal according to the product of the number of groups corresponding to the group signal and the frequency of the vertical synchronizing signal;
and adjusting the group number corresponding to the group signal by adjusting the group signal so as to adjust the frequency of the first driving signal and the second driving signal.
4. The driving method of the display panel according to claim 1, further comprising:
generating, by a digital-to-analog converter, current magnitudes of the first drive signal and the second drive signal.
5. The method for driving a display panel according to claim 2, wherein the step of determining the second driving signal corresponding to the display gray scale comprises:
and adjusting the ratio of the amplitude of the second driving signal corresponding to the same display gray scale to the amplitude of the corresponding first driving signal according to a preset proportion to obtain the second driving signal.
6. The method for driving a display panel according to claim 1, wherein the step of determining the second driving signal corresponding to the display gray scale further comprises:
adjusting the ratio of the amplitude of the second driving signal corresponding to the same display gray scale to the amplitude of the corresponding first driving signal for multiple times according to a preset proportion;
after each adjustment, comparing the frequency of the second driving signal with a preset frequency minimum threshold;
and under the condition that the frequency of the second driving signal is smaller than the preset frequency lowest threshold, finishing the adjustment of the second driving signal and outputting the adjusted second driving signal.
7. The driving method of the display panel according to claim 6,
after single adjustment, the amplitude of the second driving signal is twice that before adjustment, and the frequency of the second driving signal is half that before adjustment.
8. A display device, comprising:
a display panel including a light emitting diode array;
a dimming module, configured to control the light emitting brightness of each light emitting diode of the light emitting diode array according to the driving method of the display panel according to any one of claims 1 to 7, where the light emitting diodes correspond to pixels one to one.
9. The display device of claim 8, wherein the dimming module comprises:
the pulse amplitude dimming module is used for adjusting the amplitude of the driving current provided to each light emitting diode of the light emitting diode array according to input gray scale data so as to adjust the brightness of each light emitting diode of the light emitting diode array;
a pulse width dimming module for adjusting the pulse width of the driving current of each LED of the LED array according to the input gray scale data to adjust the brightness of each LED of the LED array,
wherein the dimming module further selects dimming by adjusting the amplitude or pulse width of the driving current according to a dimming mode control instruction,
fixing the amplitude of the driving current when the dimming is selected by adjusting the pulse width of the driving current,
when the dimming is selected by adjusting the amplitude of the drive current, the pulse width of the drive current is fixed.
10. The display device according to claim 8,
the light emitting diode array comprises any one of a light emitting diode, a micro light emitting diode, a quantum dot light emitting diode and an organic light emitting diode.
11. A terminal device, wherein the terminal device comprises the display apparatus according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210440493.5A CN114927087A (en) | 2022-04-25 | 2022-04-25 | Display panel driving method and display device |
Applications Claiming Priority (1)
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| CN105590588A (en) * | 2015-12-21 | 2016-05-18 | 武汉华星光电技术有限公司 | Backlight adjusting method, liquid crystal display device, and electronic device |
| CN112669762A (en) * | 2020-12-23 | 2021-04-16 | Tcl华星光电技术有限公司 | Driving chip, display panel and driving method thereof |
| CN113066423A (en) * | 2019-12-31 | 2021-07-02 | Tcl集团股份有限公司 | LED display drive control method and device |
| CN114038400A (en) * | 2021-10-21 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Light emitting diode driving circuit and method, display panel and driving method thereof |
| CN114360433A (en) * | 2022-01-05 | 2022-04-15 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
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| CN105590588A (en) * | 2015-12-21 | 2016-05-18 | 武汉华星光电技术有限公司 | Backlight adjusting method, liquid crystal display device, and electronic device |
| CN113066423A (en) * | 2019-12-31 | 2021-07-02 | Tcl集团股份有限公司 | LED display drive control method and device |
| CN112669762A (en) * | 2020-12-23 | 2021-04-16 | Tcl华星光电技术有限公司 | Driving chip, display panel and driving method thereof |
| CN114038400A (en) * | 2021-10-21 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Light emitting diode driving circuit and method, display panel and driving method thereof |
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