CN113674713A - Method and device for improving screen flicker and display device - Google Patents

Method and device for improving screen flicker and display device Download PDF

Info

Publication number
CN113674713A
CN113674713A CN202110963582.3A CN202110963582A CN113674713A CN 113674713 A CN113674713 A CN 113674713A CN 202110963582 A CN202110963582 A CN 202110963582A CN 113674713 A CN113674713 A CN 113674713A
Authority
CN
China
Prior art keywords
refresh rate
common voltage
value
target
display panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110963582.3A
Other languages
Chinese (zh)
Other versions
CN113674713B (en
Inventor
黄世飞
沙金
沈灿
高超
陈攀
程逸明
张英
方祥
张文迪
李金祥
殷盛杰
陈瑶
陶俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Chongqing BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Chongqing BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202110963582.3A priority Critical patent/CN113674713B/en
Publication of CN113674713A publication Critical patent/CN113674713A/en
Application granted granted Critical
Publication of CN113674713B publication Critical patent/CN113674713B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • 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
    • 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
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

Disclosed herein is a method of improving screen flicker, comprising: detecting a target refresh rate and a current refresh rate of a display panel; when the target refresh rate is different from the current refresh rate, inquiring a common voltage storage table according to the target refresh rate to obtain a common voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a common voltage reference value corresponding to the reference refresh rate of the display panel and the common voltage regulating quantity corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate; updating the voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate; the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate. This document can mitigate screen flicker caused by screen refresh rate variations.

Description

Method and device for improving screen flicker and display device
Technical Field
The present disclosure relates to, but not limited to, the field of display panel technologies, and in particular, to a method and an apparatus for improving screen flicker, and a display apparatus.
Background
The liquid crystal display panel comprises pixel units which are arranged in an array mode, each pixel unit comprises a pixel electrode, a common electrode and liquid crystal molecules arranged between the pixel electrode and the common electrode, and the liquid crystal molecules are controlled by an electric field to rotate. The voltage value (common voltage value) of the drive signal of the common electrode of the pixel unit is set and cured on the drive circuit board according to the default refresh rate of the liquid crystal panel before the liquid crystal panel is shipped from the factory. After the liquid crystal panel leaves a factory, if the refresh rate of the liquid crystal panel changes, screen display flicker may be caused, and user experience may be affected.
Disclosure of Invention
In a first aspect, an embodiment of the present disclosure provides a method for improving screen flicker, including:
detecting a target refresh rate and a current refresh rate of a display panel;
when the target refresh rate is different from the current refresh rate, inquiring a common voltage storage table according to the target refresh rate to obtain a common voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage regulating quantity corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
updating the voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
In a second aspect, an embodiment of the present disclosure provides an apparatus for improving screen flicker, including:
a signal detection module configured to detect a target refresh rate and a current refresh rate of the display panel;
the common voltage adjusting module is configured to query a common voltage storage table according to the target refresh rate to obtain a common voltage adjusting quantity corresponding to the target refresh rate when the target refresh rate is different from the current refresh rate, and take the sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjusting quantity corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
the power supply signal management module is configured to update the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
In a third aspect, an embodiment of the present disclosure provides a display device, including: the device for improving the screen flicker.
The method for improving screen flicker provided by the embodiment of the disclosure detects a target refresh rate and a current refresh rate of a display panel in real time, when the target refresh rate is different from the current refresh rate, queries a common voltage storage table according to the target refresh rate to obtain a common voltage adjustment amount corresponding to the target refresh rate, uses a sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate, and updates a voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate. According to the method for improving the screen flicker, when the refresh rate of the display panel is changed, the voltage value of the common electrode of the display panel is updated in time, so that the situation that the refresh rate is not matched with the common voltage value can be avoided, and the screen flicker caused by the change of the screen refresh rate is reduced.
Drawings
The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
Fig. 1 is a flowchart of a method for improving screen flicker provided by an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for improving screen flicker provided by the embodiments of the present disclosure;
fig. 3 is a schematic structural diagram of an apparatus for improving screen flicker according to an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.
The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.
As shown in fig. 1, an embodiment of the present disclosure provides a method for improving screen flicker, including:
step S10, detecting the target refresh rate and the current refresh rate of the display panel;
step S20, when the target refresh rate is different from the current refresh rate, inquiring a common voltage storage table according to the target refresh rate to obtain a common voltage adjustment amount corresponding to the target refresh rate, and taking the sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
step S30, updating the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
The method for improving screen flicker provided in the foregoing embodiment detects a target refresh rate and a current refresh rate of a display panel in real time, when the target refresh rate is different from the current refresh rate, queries a common voltage storage table according to the target refresh rate to obtain a common voltage adjustment amount corresponding to the target refresh rate, uses a sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate, and updates a voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate. According to the method for improving the screen flicker, when the refresh rate of the display panel is changed, the voltage value of the common electrode of the display panel is updated in time, so that the situation that the refresh rate is not matched with the common voltage value can be avoided, and the screen flicker caused by the change of the screen refresh rate is reduced.
The refresh rate indicates how many times the image of the screen is redrawn per second, i.e., the number of screen refreshes per second, in Hz (hertz). The reference refresh rate is a default refresh rate of the system, and the other refresh rates except the reference refresh rate are non-reference refresh rates. For example, when the reference refresh rate is 75Hz, the refresh rates of other frequency values than 75Hz are all non-reference refresh rates, such as 120Hz and 60Hz are all non-reference refresh rates.
An example of a common voltage stored value table is given in table 1 below. In this example, there are a total of N +1 refresh rates and N +1 values of the common voltage adjustment. Reference refresh rate of f0The N non-reference refresh rates are: f. of1To fN. Reference refresh rate f0The value of the corresponding public voltage regulating quantity is 0; the value of the common voltage regulating quantity corresponding to the ith non-reference refresh rate is delta Ui，ΔUi＝Ui-U0；UiIs the optimum common voltage value, U, for the ith non-reference refresh rate match0Is a common voltage reference value, i is more than or equal to 1 and less than or equal to N.
Refresh rate (Hz) Common voltage adjustment (v))
f0 0
f1 ΔU1
f2 ΔU2
… …
fN-1 ΔUN-1
fN ΔUN
TABLE 1
According to the method for improving the screen flicker provided by the embodiment, the public voltage regulating quantity corresponding to the refresh rate is stored in the public voltage stored value table instead of the best public voltage value matched with the refresh rate, so that the influence of individual difference of the public voltage reference value (the public voltage reference value of different individuals of the display panels produced in batch can be different) on various data in the public voltage stored value table can be eliminated, and the universality of the public voltage stored value table is improved.
In some exemplary embodiments, the detecting the target refresh rate and the current refresh rate of the display panel includes:
detecting a time interval t1 between a frame start signal STV of a next frame and a frame start signal of a current frame, taking the time interval t1 as a period of a target frame start signal, and determining a frequency f1 of the target frame start signal according to the period of the target frame start signal: f1 is 1/t 1; taking the frequency of the target frame starting signal as a target refresh rate of the display panel;
determining a time interval t0 between a frame start signal of a current frame and a frame start signal of a previous frame, taking the time interval t0 as a period of the current frame start signal, and determining a frequency f0 of the current frame start signal according to the period of the current frame start signal: f0 is 1/t 0; and taking the frequency of the current frame starting signal as the current refresh rate of the display panel.
The frame start signal is a trigger signal for indicating the start of a frame. The frequency value of the frame start signal may be taken as the frequency value of the refresh rate of the display panel. In the above embodiment, by detecting the period T of the frame start signal, the frequency f of the frame start signal can be indirectly obtained, and f is 1/T. In other embodiments, other signals may be used as the signal indicative of the screen refresh rate.
In some exemplary embodiments, the method further comprises: and when the target refresh rate is the same as the current refresh rate, keeping the voltage value of the driving signal of the common electrode of the display panel unchanged.
In some exemplary embodiments, after updating the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate, the method further includes:
and storing the updated voltage value of the driving signal of the common electrode of the display panel.
The reference refresh rate and the common voltage reference value may be system default parameters, and are generally set and stored in the system before factory shipment.
As shown in fig. 2, in some exemplary embodiments, the method for improving screen flickering may include the steps of:
step S101, collecting frame starting signals of a 1 st frame and a 2 nd frame;
in the first frame and the second frame, the voltage value of the driving signal of the common electrode of the display panel may be set to a system default value, such as a common voltage reference value corresponding to a reference refresh rate, or a voltage value of the driving signal of the common electrode of the display panel that is saved before the system is powered off last time;
step S102, setting an initial value of a first time interval t0, an initial value of t0 may be set as a time interval between frame start signals of a 1 st frame and a 2 nd frame;
step S103, collecting a frame starting signal of the next frame;
wherein if the current frame is the ith frame and i is greater than or equal to 2, the next frame is the (i + 1) th frame;
step S104, setting a second time interval t1, wherein t1 is the time interval between the frame start signal of the next frame and the frame start signal of the current frame;
step S105, judging whether the first time interval t0 and the second time interval t1 are equal, if so, executing step S106, and if not, executing step S107;
step S106, keeping the voltage value of the driving signal of the common electrode of the display panel unchanged, and turning to step S111;
step S107, determining a target refresh rate f1 of the display panel according to the second time interval t1, wherein f1 is 1/t 1;
step S108, inquiring a common voltage storage value table according to the target refresh rate f1 to obtain a common voltage regulating quantity delta u corresponding to the target refresh rate;
step S109, converting the common voltage reference value V corresponding to the reference refresh rate of the display panelrefThe sum of the common voltage adjustment amount Δ u corresponding to the target refresh rate is taken as the common voltage value V1 corresponding to the target refresh rate: v1 ═ Vref+Δu；
Step S110, updating the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value V1 corresponding to the target refresh rate, and storing the updated voltage value of the driving signal of the common electrode of the display panel;
step S111, updating the value of the first time interval t0, setting the value of t0 as the value of the second time interval t1, and returning to step S103.
In some exemplary embodiments, updating a voltage value of a driving signal of a common electrode of the display panel according to a common voltage value corresponding to the target refresh rate includes: and updating the voltage value of the driving signal of the common electrode of the display panel in the blanking period of the current frame of the display panel.
The public voltage value is updated in the blanking period of the display panel, and the influence of the change of the public voltage value on the data display of the display panel can be reduced by utilizing the characteristic that no effective data signal exists in the blanking period.
In some exemplary embodiments, the method for improving screen flickering further includes:
determining a reference refresh rate and N non-reference refresh rates to be tested; n is greater than or equal to 1;
establishing and storing a common voltage storage value table; wherein the common voltage storage table comprises N +1 records, and the 1 st record is used for storing the frequency value f of the reference refresh rate0And the corresponding common voltage regulating quantity 0, the (i + 1) th record is used for storing the frequency value f of the ith non-reference refresh rate to be measurediAnd a corresponding common voltage adjustment Δ Vi；
ΔVi＝Vi-Vref；
ViIs the ith non-reference refresh rate f to be measurediCorresponding common voltage value, VrefIs a common voltage reference value; i is more than or equal to 1 and less than or equal to N.
In some exemplary embodiments, the creating and storing a common voltage storage table includes:
for the ith non-reference refresh rate f to be measurediTesting M display panels at the non-reference refresh rate fiCommon voltage value V of lower matchingijDetermining the non-reference refresh rate f of any display paneliLower common voltage adjustment amount Δ Vij：ΔVij＝Vij-Vref(ii) a Setting M display panels at non-reference refresh rate fiLower common voltage adjustment amount Δ VijIs taken as the ith non-reference refresh rate f to be measurediCorresponding common voltage adjustment quantity delta Vi；
Figure BDA0003223123300000071
Generating the (i + 1) th record of the common voltage storage table, wherein the (i + 1) th record is used for recording the ith non-reference refresh rate f to be testediAnd the corresponding common voltage adjustment amount Δ Vi(ii) a I is more than or equal to 1 and less than or equal to N, and j is more than or equal to 1 and less than or equal to M; m is greater than 1;
wherein the 1 st record of the common voltage storage table stores a frequency value f of a reference refresh rate0And a corresponding common voltage adjustment amount of 0.
The corresponding relation between the refresh rate and the common voltage of the display panel can be tested before the display panel leaves a factory, and a common voltage storage table is established and stored in a system. During batch production, different individuals in the same batch of display panels may have differences in the common voltage reference value under the same reference refresh rate, but it is impossible to test the corresponding relationship between the refresh rate and the common voltage value for each display panel under the batch production condition, and by testing samples in the same batch of display panels, the voltage offset of the common voltage value corresponding to all non-reference refresh rates relative to the common voltage reference value corresponding to the reference refresh rate is obtained, and even if the common voltage reference values of different individuals in the same batch of display panels have differences, the voltage offset as a difference value is not affected by the change of the common voltage reference value, so that all individuals in the same batch of display panels can directly use the common voltage stored value table obtained by the sample test. Therefore, the method for improving the screen flicker can meet the production requirement of mass production, and the universality of the common voltage storage table is improved.
In batch production, the same batch of display panels may be: a small panel cut from a large panel of the same large glass pair box. The same batch of display panels may also be: and a small panel is formed by cutting a plurality of large panels formed by a plurality of large glass paired boxes produced under the same process conditions. In mass production, the same batch of display panels has the same or similar material and electrical properties. In order to ensure the accuracy of the test, a certain number of samples are required, for example, more than or equal to 1000 display panels may be selected for the test, so as to obtain the corresponding relationship between the refresh rate and the common voltage value. In batch production, the data of a plurality of samples (for example, M samples) of the same batch of display panels are tested, and then the data of the M samples are averaged, so that the test data of the samples can be more accurate.
As shown in fig. 2, an embodiment of the present disclosure provides an apparatus for improving screen flicker, including:
the signal detection module 10 is configured to detect a target refresh rate and a current refresh rate of the display panel, and send information of the target refresh rate and the current refresh rate to the common voltage adjustment module;
a common voltage adjusting module 20, configured to, when the target refresh rate is different from the current refresh rate, query a common voltage storage table according to the target refresh rate to obtain a common voltage adjustment amount corresponding to the target refresh rate, and use a sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
the power supply signal management module 30 is configured to update the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
In the apparatus for improving screen flicker provided in the above embodiment, the signal detection module detects a target refresh rate and a current refresh rate of the display panel in real time, the common voltage adjustment module queries the common voltage storage table according to the target refresh rate to obtain a common voltage adjustment amount corresponding to the target refresh rate when the target refresh rate is different from the current refresh rate, a sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate is used as a common voltage value corresponding to the target refresh rate, and the power signal management module updates a voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate. According to the device for improving screen flicker, when the refresh rate of the display panel is changed, the voltage value of the common electrode of the display panel is updated in time, so that the situation that the refresh rate is not matched with the common voltage value can be avoided, and screen flicker caused by the change of the screen refresh rate is reduced.
In some exemplary embodiments, the signal detection module is configured to detect a target refresh rate and a current refresh rate of the display panel in the following manner: detecting a time interval t1 between a frame start signal STV of a next frame and a frame start signal of a current frame, taking the time interval t1 as a period of a target frame start signal, and determining a frequency f1 of the target frame start signal according to the period of the target frame start signal: f1 is 1/t 1; taking the frequency of the target frame starting signal as a target refresh rate of the display panel; determining a time interval t0 between a frame start signal of a current frame and a frame start signal of a previous frame, taking the time interval t0 as a period of the current frame start signal, and determining a frequency f0 of the current frame start signal according to the period of the current frame start signal: f0 is 1/t 0; and taking the frequency of the current frame starting signal as the current refresh rate of the display panel.
In some exemplary embodiments, the power signal management module is further configured to, after updating the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate, save the updated voltage value of the driving signal of the common electrode of the display panel.
In some exemplary embodiments, the power signal management module is configured to update a voltage value of a driving signal of a common electrode of the display panel according to a common voltage value corresponding to the target refresh rate in the following manner: and updating the voltage value of the driving signal of the common electrode of the display panel in the blanking period of the current frame of the display panel.
In some exemplary embodiments, the common voltage adjusting module is further configured to control the power signal management module to maintain the voltage value of the driving signal of the common electrode of the display panel constant when the target refresh rate is the same as the current refresh rate.
In some exemplary embodiments, the apparatus for improving screen flickering further includes: a common voltage stored value table establishing module;
the common voltage storage table establishing module is configured to determine a reference refresh rate and N non-reference refresh rates to be measured; n is greater than or equal to 1; establishing and storing a common voltage storage value table; wherein the common voltage storage table comprises N +1 records, and the 1 st record is used for storing the frequency value f of the reference refresh rate0And the corresponding common voltage regulating quantity 0, the (i + 1) th record is used for storing the frequency value f of the ith non-reference refresh rate to be measurediAnd a corresponding common voltage adjustment Δ Vi；ΔVi＝Vi-Vref；ViIs the ith non-reference refresh rate f to be measurediCorresponding common voltage value, VrefIs a common voltage reference value; i is more than or equal to 1 and less than or equal to N.
In some exemplary embodiments, the common voltage stored value table establishing module is configured to establish and maintain the common voltage stored value table by: for the ith non-reference refresh rate f to be measurediTesting M display panels at the non-reference refresh rate fiCommon voltage value V of lower matchingijDetermining the non-reference refresh rate f of any display paneliLower common voltage adjustment amount Δ Vij：ΔVij＝Vij-Vref(ii) a Setting M display panels at non-reference refresh rate fiLower common voltage adjustment amount Δ VijIs taken as the ith non-reference refresh rate f to be measurediCorresponding common voltage adjustment quantity delta Vi；
Figure BDA0003223123300000101
Generating a common voltageThe i +1 th record of the value storage table is used for recording the ith non-reference refresh rate f to be measurediAnd the corresponding common voltage adjustment amount Δ Vi(ii) a I is more than or equal to 1 and less than or equal to N, and j is more than or equal to 1 and less than or equal to M; m is greater than 1;
wherein the 1 st record of the common voltage storage table stores a frequency value f of a reference refresh rate0And a corresponding common voltage adjustment amount of 0.
The driving circuit of the liquid crystal display panel generally includes a timing control circuit, a power management circuit, and the like. The timing control circuit can convert the display signal sent from the front end into a low voltage differential signal for the data driving circuit (source driving circuit) and various timing control signals. The power management circuit can generate various voltage signals required by the driving circuit by performing DC-DC conversion on the multiple power signals.
In some exemplary embodiments, the signal detection module and the common voltage adjustment module may be configured as a logic control unit inside the timing control circuit. In other embodiments, the signal detection module and the common voltage adjustment module may also be configured as a logic control unit independent of a timing control circuit (TCON).
In some exemplary embodiments, the power signal management module may be configured as a logic control unit within the power management circuit. The common voltage regulation module may send data to the power signal management module via the communication interface. The interface for both communications may be an IIC (integrated circuit bus) communications interface or other interface.
The embodiment of the application also provides a display device which comprises the device for improving the screen flicker.
The display device may be a liquid crystal display device. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Although the embodiments disclosed in the present disclosure are described above, the descriptions are only for the convenience of understanding the present disclosure, and are not intended to limit the present disclosure. It will be understood by those skilled in the art of the present disclosure that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure is to be limited only by the terms of the appended claims.

Claims (10)

1. A method of improving screen flicker, comprising:
detecting a target refresh rate and a current refresh rate of a display panel;
when the target refresh rate is different from the current refresh rate, inquiring a common voltage storage table according to the target refresh rate to obtain a common voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage regulating quantity corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
updating the voltage value of a driving signal of a common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
2. The method for improving screen flicker of claim 1, wherein:
the detecting the target refresh rate and the current refresh rate of the display panel comprises the following steps:
detecting a time interval t1 between a frame start signal STV of a next frame and a frame start signal of a current frame, taking the time interval t1 as a period of a target frame start signal, and determining a frequency f1 of the target frame start signal according to the period of the target frame start signal: f1 is 1/t 1; taking the frequency of the target frame starting signal as a target refresh rate of the display panel;
determining a time interval t0 between a frame start signal of a current frame and a frame start signal of a previous frame, taking the time interval t0 as a period of the current frame start signal, and determining a frequency f0 of the current frame start signal according to the period of the current frame start signal: f0 is 1/t 0; and taking the frequency of the current frame starting signal as the current refresh rate of the display panel.
3. The method for improving screen flicker of claim 1, wherein:
after the voltage value of the driving signal of the common electrode of the display panel is updated according to the common voltage value corresponding to the target refresh rate, the method further comprises:
and storing the updated voltage value of the driving signal of the common electrode of the display panel.
4. The method for improving screen flicker of claim 1, wherein:
the method further comprises the following steps: and when the target refresh rate is the same as the current refresh rate, keeping the voltage value of the driving signal of the common electrode of the display panel unchanged.
5. The method for improving screen flicker of claim 1, wherein:
updating the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate, wherein the updating comprises the following steps: and updating the voltage value of the driving signal of the common electrode of the display panel in the blanking period of the current frame of the display panel.
6. The method for improving screen flicker of claim 1, wherein:
the method for improving the screen flicker further comprises the following steps:
determining a reference refresh rate and N non-reference refresh rates to be tested; n is greater than or equal to 1;
establishing and storing a common voltage storage value table; the common voltage storage table comprises N +1 records, the 1 st record is used for storing the frequency value of the reference refresh rate and the corresponding common voltage regulating quantity 0, and the i +1 th record is used for storing the frequency value f of the ith to-be-detected non-reference refresh rateiAnd a corresponding common voltage adjustment Δ Vi；
ΔVi＝Vi-Vref；
ViIs the ith non-reference refresh rate f to be measurediCorresponding common voltage value, VrefIs a common voltage reference value; i is more than or equal to 1 and less than or equal to N.
7. The method for improving screen flicker of claim 6, wherein:
the establishing and saving of the common voltage storage value table comprises the following steps:
for the ith non-reference refresh rate f to be measurediTesting M display panels at the non-reference refresh rate fiCommon voltage value V of lower matchingijDetermining the non-reference refresh rate f of any display paneliLower common voltage adjustment amount Δ Vij：ΔVij＝Vij-Vref(ii) a Setting M display panels at non-reference refresh rate fiLower common voltage adjustment amount Δ VijIs taken as the ith non-reference refresh rate f to be measurediCorresponding common voltage adjustment quantity delta Vi；
Figure FDA0003223123290000021
Generating the (i + 1) th record of the common voltage storage table, wherein the (i + 1) th record is used for recording the ith non-reference refresh rate f to be testediAnd the corresponding common voltage adjustment amount Δ Vi(ii) a I is more than or equal to 1 and less than or equal to N, and j is more than or equal to 1 and less than or equal to M; m is greater than 1;
wherein, the 1 st record of the common voltage value storage table is used for storing the frequency value of the reference refresh rate and the corresponding common voltage adjustment amount 0.
8. An apparatus for improving screen flicker, comprising:
a signal detection module configured to detect a target refresh rate and a current refresh rate of the display panel;
the common voltage adjusting module is configured to query a common voltage storage table according to the target refresh rate to obtain a common voltage adjusting quantity corresponding to the target refresh rate when the target refresh rate is different from the current refresh rate, and take the sum of a common voltage reference value corresponding to a reference refresh rate of the display panel and the common voltage adjusting quantity corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
the power supply signal management module is configured to update the voltage value of the driving signal of the common electrode of the display panel according to the common voltage value corresponding to the target refresh rate;
the common voltage storage value table stores common voltage adjustment values corresponding to a plurality of refresh rates; the common voltage regulating quantity corresponding to any one refresh rate is the voltage difference between the optimal common voltage value matched with the refresh rate and the common voltage reference value corresponding to the reference refresh rate.
9. The apparatus for improving screen flicker of claim 8, wherein:
the device for improving screen flicker further comprises: a common voltage stored value table establishing module;
the common voltage storage table establishing module is configured to determine a reference refresh rate and N non-reference refresh rates to be measured; n is greater than or equal to 1; establishing and storing a common voltage storage value table; wherein the common voltage storage table comprises N +1 records, and the 1 st record is used for storing the frequency value f of the reference refresh rate0And the corresponding common voltage regulating quantity 0, the (i + 1) th record is used for storing the frequency value f of the ith non-reference refresh rate to be measurediAnd a corresponding common voltage adjustment Δ Vi；ΔVi＝Vi-Vref；ViIs the ith non-reference refresh rate f to be measurediCorresponding common voltage value, VrefIs a common voltage reference value; i is more than or equal to 1 and less than or equal to N.
10. A display device comprising the device for improving screen flickering of any one of claims 8 to 9.
CN202110963582.3A 2021-08-20 2021-08-20 Method and device for improving screen flicker and display device Active CN113674713B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110963582.3A CN113674713B (en) 2021-08-20 2021-08-20 Method and device for improving screen flicker and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110963582.3A CN113674713B (en) 2021-08-20 2021-08-20 Method and device for improving screen flicker and display device

Publications (2)

Publication Number Publication Date
CN113674713A true CN113674713A (en) 2021-11-19
CN113674713B CN113674713B (en) 2023-07-18

Family

ID=78544920

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110963582.3A Active CN113674713B (en) 2021-08-20 2021-08-20 Method and device for improving screen flicker and display device

Country Status (1)

Country Link
CN (1) CN113674713B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114299891A (en) * 2021-12-23 2022-04-08 长沙惠科光电有限公司 Display panel driving method, driver and display device
CN114299879A (en) * 2021-12-28 2022-04-08 合肥维信诺科技有限公司 Driving method and device of display panel, storage medium and electronic equipment
CN116825042A (en) * 2023-04-19 2023-09-29 惠科股份有限公司 Gamma voltage adjusting method, gamma voltage adjusting circuit and display device

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007193A1 (en) * 2002-09-04 2006-01-12 Masakatsu Yamashita Image display device with circuits to compensate voltage drop in the common electrode for active matrix liquid crystal displays
CN101346756A (en) * 2006-06-13 2009-01-14 松下电器产业株式会社 Gray-scale correcting device
CN101383128A (en) * 2007-09-07 2009-03-11 北京京东方光电科技有限公司 Voltage automatic compensating method and apparatus for common electrode
CN104376820A (en) * 2013-08-15 2015-02-25 友达光电股份有限公司 Display device and adjusting method thereof
CN105355185A (en) * 2015-12-14 2016-02-24 厦门天马微电子有限公司 Driving circuit of display panel, display device and driving method thereof
CN106683603A (en) * 2017-01-10 2017-05-17 广东欧珀移动通信有限公司 Splash screen handling method and terminal
CN107039013A (en) * 2017-05-25 2017-08-11 上海中航光电子有限公司 A kind of display driver circuit plate, its driving method and display device
CN107464540A (en) * 2017-09-26 2017-12-12 京东方科技集团股份有限公司 Liquid crystal display, display panel and its VCOM voltage control methods and device
US20180059868A1 (en) * 2016-08-29 2018-03-01 Apple Inc. Touch induced flicker mitigation for variable refresh rate display
CN109313881A (en) * 2016-07-01 2019-02-05 英特尔公司 Display controller with the multiple common voltages for corresponding to multiple refresh rates
US20210020113A1 (en) * 2019-07-18 2021-01-21 Samsung Display Co., Ltd. Method of driving display panel and display apparatus for performing the same
CN212874004U (en) * 2020-07-30 2021-04-02 惠科股份有限公司 Display panel's drive circuit and display device

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060007193A1 (en) * 2002-09-04 2006-01-12 Masakatsu Yamashita Image display device with circuits to compensate voltage drop in the common electrode for active matrix liquid crystal displays
CN101346756A (en) * 2006-06-13 2009-01-14 松下电器产业株式会社 Gray-scale correcting device
CN101383128A (en) * 2007-09-07 2009-03-11 北京京东方光电科技有限公司 Voltage automatic compensating method and apparatus for common electrode
CN104376820A (en) * 2013-08-15 2015-02-25 友达光电股份有限公司 Display device and adjusting method thereof
CN105355185A (en) * 2015-12-14 2016-02-24 厦门天马微电子有限公司 Driving circuit of display panel, display device and driving method thereof
CN109313881A (en) * 2016-07-01 2019-02-05 英特尔公司 Display controller with the multiple common voltages for corresponding to multiple refresh rates
US20180059868A1 (en) * 2016-08-29 2018-03-01 Apple Inc. Touch induced flicker mitigation for variable refresh rate display
CN106683603A (en) * 2017-01-10 2017-05-17 广东欧珀移动通信有限公司 Splash screen handling method and terminal
CN107039013A (en) * 2017-05-25 2017-08-11 上海中航光电子有限公司 A kind of display driver circuit plate, its driving method and display device
CN107464540A (en) * 2017-09-26 2017-12-12 京东方科技集团股份有限公司 Liquid crystal display, display panel and its VCOM voltage control methods and device
US20210020113A1 (en) * 2019-07-18 2021-01-21 Samsung Display Co., Ltd. Method of driving display panel and display apparatus for performing the same
CN212874004U (en) * 2020-07-30 2021-04-02 惠科股份有限公司 Display panel's drive circuit and display device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JASON LU;: "通过可变帧率优化显示图像质量和功耗", 电子产品世界 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114299891A (en) * 2021-12-23 2022-04-08 长沙惠科光电有限公司 Display panel driving method, driver and display device
CN114299879A (en) * 2021-12-28 2022-04-08 合肥维信诺科技有限公司 Driving method and device of display panel, storage medium and electronic equipment
CN116825042A (en) * 2023-04-19 2023-09-29 惠科股份有限公司 Gamma voltage adjusting method, gamma voltage adjusting circuit and display device

Also Published As

Publication number Publication date
CN113674713B (en) 2023-07-18

Similar Documents

Publication Publication Date Title
CN113674713B (en) Method and device for improving screen flicker and display device
US9805674B2 (en) Adjusting method of display parameter and liquid crystal display system
CN109658900B (en) Driving method, compensation circuit and driving device of display panel and display device
CN113470581B (en) Method and device for controlling backlight brightness of display, electronic equipment and storage medium
US20080278471A1 (en) Liquid crystal display with common voltage compensation and driving method thereof
KR101320019B1 (en) Driving IC, liquid crystal display and display system
CN109637496B (en) Liquid crystal display device and driving method thereof
US20090237338A1 (en) Liquid crystal display device and driving method thereof, over-drive correction device and data production method thereof and electronic device
US11682346B2 (en) Method, apparatus, and device for determining aging degree of pixel in display panel, and method, apparatus, and device for compensating display brightness of pixel
CN109377967B (en) Display panel correction method and display device
US8299991B2 (en) Display driver method and apparatus
WO2019174359A1 (en) Voltage compensation method and apparatus, and touch display module
US20200098326A1 (en) Driving method of display panel, pixel driving circuit, and display panel
WO2023005867A1 (en) Backlight compensation method, device and system, and storage medium
CN114299891B (en) Display panel driving method, driver and display device
CN109036315B (en) Driving method and driving device of display panel and display equipment
US9685123B2 (en) Method of testing a display apparatus and a display apparatus tested by the same
CN111968594B (en) Display driving method, display driving system and display device
CN109444606B (en) Charging test method and charging test device
CN111028775A (en) Pixel driving circuit, mobility correction method thereof and display device
US11735135B2 (en) Screen flicker performance manager
US11830450B2 (en) Method for adjusting dark-state voltage applied on liquid crystal display panel, device, and storage medium
CN114550672B (en) Display panel brightness compensation method, display panel brightness compensation device and storage medium
CN115171617A (en) Driving method and driving device of display panel
CN113261045A (en) Display module and brightness control method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant