CN113674713B - 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
CN113674713B
CN113674713B CN202110963582.3A CN202110963582A CN113674713B CN 113674713 B CN113674713 B CN 113674713B CN 202110963582 A CN202110963582 A CN 202110963582A CN 113674713 B CN113674713 B CN 113674713B
Authority
CN
China
Prior art keywords
refresh rate
common voltage
target
display panel
value
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.)
Active
Application number
CN202110963582.3A
Other languages
Chinese (zh)
Other versions
CN113674713A (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

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 the display panel; when the target refresh rate is different from the current refresh rate, inquiring a public voltage stored value table according to the target refresh rate to obtain a public voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage regulating quantity corresponding to the target refresh rate as a public voltage value corresponding to the target refresh rate; 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 public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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. Screen flicker caused by a change in screen refresh rate can be reduced.

Description

Method and device for improving screen flicker and display device
Technical Field
The present disclosure relates to the field of display panels, and in particular, to a method and apparatus for improving screen flicker, and a display device.
Background
The liquid crystal display panel comprises pixel units which are arranged in an array mode, wherein 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 driving signal of the common electrode of the pixel unit is set and cured on the driving circuit board according to the default refresh rate of the liquid crystal panel before the liquid crystal panel leaves the factory. After the liquid crystal panel leaves the factory, if the refresh rate of the liquid crystal panel changes, the screen display flicker can be caused, and the user experience is 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 the display panel;
when the target refresh rate is different from the current refresh rate, inquiring a public voltage stored value table according to the target refresh rate to acquire a public voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage regulating quantity corresponding to the target refresh rate as a public voltage value corresponding to the target refresh rate;
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 public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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, embodiments of the present disclosure provide an apparatus for improving screen flicker, including:
the signal detection module is configured to detect a target refresh rate and a current refresh rate of the display panel;
the public voltage regulating module is configured to query a public voltage stored value table according to the target refresh rate to acquire a public voltage regulating 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 public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage regulating quantity corresponding to the target refresh rate as a public voltage value corresponding to the target refresh rate;
a power signal management module 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;
the public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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, embodiments of the present disclosure provide a display device, including: the device for improving screen flicker.
According to the method for improving screen flicker, the target refresh rate and the current refresh rate of the display panel are detected in real time, when the target refresh rate is different from the current refresh rate, a public voltage storage value table is queried according to the target refresh rate to obtain a public voltage adjustment amount corresponding to the target refresh rate, the sum of the public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage adjustment amount corresponding to the target refresh rate is used as a public voltage value corresponding to the target refresh rate, and the voltage value of a driving signal of a public electrode of the display panel is updated according to the public voltage value corresponding to the target refresh rate. According to the method for improving screen flicker, when the display panel changes the refresh rate, the voltage value of the common electrode of the display panel is updated in time, so that the mismatch between the refresh rate and 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 technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure.
FIG. 1 is a flow chart 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 embodiments of the present disclosure;
fig. 3 is a schematic structural diagram of a device for improving screen flicker according to an embodiment of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail hereinafter with reference to the accompanying drawings. Note that embodiments may be implemented in a number of different forms. One of ordinary skill in the art can readily appreciate the fact that the manner and content may be varied into a wide variety of forms without departing from the spirit and scope of the present disclosure. Accordingly, the present disclosure should not be construed as being limited to the following description of the embodiments. Embodiments of the present disclosure and features of embodiments may be combined with each other arbitrarily without conflict.
The ordinal numbers of "first", "second", "third", etc. in the present specification are provided to avoid mixing of constituent elements, and are not intended to be 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 a target refresh rate and a current refresh rate of a display panel;
step S20, when the target refresh rate is different from the current refresh rate, inquiring a public voltage stored value table according to the target refresh rate to obtain a public voltage adjustment quantity corresponding to the target refresh rate, and taking the sum of a public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage adjustment quantity corresponding to the target refresh rate as a public 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 public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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.
According to the method for improving screen flicker, the target refresh rate and the current refresh rate of the display panel are detected in real time, when the target refresh rate is different from the current refresh rate, the public voltage storage value table is queried according to the target refresh rate to obtain the public voltage adjustment quantity corresponding to the target refresh rate, the sum of the public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage adjustment quantity corresponding to the target refresh rate is used as the public voltage value corresponding to the target refresh rate, and the voltage value of the driving signal of the public electrode of the display panel is updated according to the public voltage value corresponding to the target refresh rate. According to the method for improving screen flicker, when the display panel changes the refresh rate, the voltage value of the common electrode of the display panel is updated in time, so that the mismatch between the refresh rate and 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 other refresh rates than 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, 60Hz are all non-reference refresh rates.
Table 1 below gives an example of a common voltage stored value table. In this example, there are a total of n+1 refresh rates and n+1 common voltage adjustment values. The reference refresh rate is f 0 The N non-reference refresh rates are respectively: f (f) 1 To f N . Reference refresh rate f 0 The corresponding value of the common voltage regulating quantity is 0; the value of the common voltage adjustment amount corresponding to the ith non-reference refresh rate is DeltaU i ，ΔU i ＝U i -U 0 ；U i Is the optimal common voltage value of the ith non-reference refresh rate match, U 0 Is 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)
f 0 0
f 1 ΔU 1
f 2 ΔU 2
… …
f N-1 ΔU N-1
f N ΔU N
TABLE 1
The method for improving screen flicker provided in the above embodiment can eliminate the influence of individual differences of the common voltage reference value (the common voltage reference value of different individuals of display panels produced in batch may be different) on each item of data in the common voltage stored value table by storing the common voltage adjustment amount corresponding to the refresh rate in the common voltage stored value table instead of storing the optimal common voltage value matched with the refresh rate, thereby improving the versatility of the common voltage stored value table.
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 =1/t 1; taking the frequency of the target frame start 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 =1/t 0; and taking the frequency of the current frame start 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 used as the frequency value of the display panel refresh rate. In the above embodiment, the frequency f, f=1/T of the frame start signal can be indirectly obtained by detecting the period T of the frame start signal. In other embodiments, other signals may be employed as the signal indicative of the screen refresh rate.
In some exemplary embodiments, the method further comprises: when the target refresh rate is the same as the current refresh rate, the voltage value of the driving signal of the common electrode of the display panel is kept 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:
the updated voltage value of the driving signal of the common electrode of the display panel is saved.
The reference refresh rate and the common voltage reference value may be system default parameters, typically set before shipping and stored in the system.
As shown in fig. 2, in some exemplary embodiments, the method of improving screen flicker may include the steps of:
step S101, collecting frame start signals of the 1 st frame and the 2 nd frame;
the voltage value of the driving signal of the common electrode of the display panel in the first frame and the second frame may be set as a default value of the system, such as a common voltage reference value corresponding to the reference refresh rate, or the voltage value of the driving signal of the common electrode of the display panel stored by the system before the last power-off;
step S102, setting an initial value of a first time interval t0, wherein the initial value of t0 can 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 start signal of a next frame;
wherein, if the current frame is the i-th frame, i is greater than or equal to 2, the next frame is the i+1th 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, executing step S106 when the first time interval t0 and the second time interval t1 are equal, and executing step S107 when the first time interval t0 and the second time interval t1 are not equal;
step S106, keeping the voltage value of the drive signal of the common electrode of the display panel unchanged, and turning to step S111;
step S107, determining a target refresh rate f1, f1=1/t 1 of the display panel according to the second time interval t1;
step S108, inquiring a public voltage stored value table according to the target refresh rate f1 to obtain a public voltage adjustment quantity Deltau corresponding to the target refresh rate;
step S109, the common voltage reference value V corresponding to the reference refresh rate of the display panel is obtained ref The sum of the common voltage adjustment amounts au corresponding to the target refresh rate is taken as a common voltage value V1 corresponding to the target refresh rate: v1=v ref +Δu；
Step S110, the voltage value of the driving signal of the public electrode of the display panel is updated according to the public voltage value V1 corresponding to the target refresh rate, and the updated voltage value of the driving signal of the public electrode of the display panel is saved;
in step S111, the value of the first time interval t0 is updated, the value of t0 is set to the value of the second time interval t1, and the process returns to step S103.
In some exemplary embodiments, 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 includes: the voltage value of the driving signal of the common electrode of the display panel is updated in the blanking period of the current frame of the display panel.
The common voltage value is updated in the blanking period of the display panel, so that the influence of the change of the common 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 flicker 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 public voltage stored value table; wherein the common voltage stores a valueThe table includes n+1 records, record 1 for storing the frequency value f of the reference refresh rate 0 And the corresponding common voltage regulating quantity 0, the (i+1) th record is used for storing the frequency value f of the (i) th non-reference refresh rate to be tested i And the corresponding common voltage adjustment amount DeltaV i ；
ΔV i ＝V i -V ref ；
V i Is the ith non-reference refresh rate f to be measured i Corresponding common voltage value V ref Is a common voltage reference value; i is more than or equal to 1 and N is more than or equal to N.
In some exemplary embodiments, the creating and storing a common voltage stored value table includes:
for the ith non-reference refresh rate f to be measured i Testing M display panels at the non-reference refresh rate f i Under-matched common voltage value V ij Determining that any display panel is at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij ：ΔV ij ＝V ij -V ref The method comprises the steps of carrying out a first treatment on the surface of the Setting M display panels at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij As the i-th non-reference refresh rate f to be measured i Corresponding common voltage adjustment quantity DeltaV i ；
Generating an (i+1) th record of a common voltage stored value table, wherein the (i+1) th record is used for recording an (i) th non-reference refresh rate f to be measured i Frequency value of (a) and corresponding common voltage adjustment amount DeltaV i The method comprises the steps of carrying out a first treatment on the surface of the I is more than or equal to 1 and less than or equal to N, 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 value table is used for storing the frequency value f of the reference refresh rate 0 And a corresponding common voltage adjustment amount 0.
The corresponding relation between the refresh rate of the display panel and the common voltage can be tested before the display panel leaves the factory, and a common voltage stored value table is established and stored in the system. During mass production, the common voltage reference values of different individuals in the same batch of display panels under the same reference refresh rate may have differences, but under the condition of mass production, the corresponding relation between the refresh rate and the common voltage value of each display panel cannot be tested, and 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 by testing samples in the same batch of display panels, so that even if the common voltage reference values of different individuals in the same batch of display panels have differences, the voltage offset is not influenced by the change of the common voltage reference value, and all the 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 adapt to the production requirement of mass production and improve the universality of the public voltage storage value table.
In mass production, the same batch of display panels may be: and small panels cut from a large panel formed by the same large glass pair box. The same batch of display panels may also be: and cutting a plurality of large glass sheets produced under the same process conditions into a plurality of small panels formed by cutting a plurality of large panels formed by the boxes. In mass production, the same batch of display panels have the same or similar material and electrical properties. In order to ensure the accuracy of the test, a certain amount of sample is required, for example, more than or equal to 1000 display panels can be selected for the test, so that the corresponding relation between the refresh rate and the common voltage value is obtained. During mass production, the data of a plurality of samples (such as 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;
the common voltage adjusting module 20 is configured to query a common voltage stored value table according to the target refresh rate to obtain a common voltage adjusting amount 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 the reference refresh rate of the display panel and the common voltage adjusting amount corresponding to the target refresh rate as a common voltage value corresponding to the target refresh rate;
a power signal management module 30 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;
the public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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.
According to the device for improving screen flicker, the signal detection module detects the target refresh rate and the current refresh rate of the display panel in real time, the common voltage adjustment module queries the common voltage stored value table according to the target refresh rate to obtain the common voltage adjustment amount corresponding to the target refresh rate when the target refresh rate is different from the current refresh rate, the sum of the common voltage reference value corresponding to the reference refresh rate of the display panel and the common voltage adjustment amount corresponding to the target refresh rate is used as the common voltage value corresponding to the target refresh rate, and the power supply signal management module updates 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. When the display panel changes the refresh rate, the device for improving the screen flicker can avoid the mismatch between the refresh rate and the common voltage value and lighten the screen flicker caused by the change of the screen refresh rate by timely updating the voltage value of the common electrode of the display panel.
In some exemplary embodiments, the signal detection module is configured to detect the target refresh rate and the 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 =1/t 1; taking the frequency of the target frame start 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 =1/t 0; and taking the frequency of the current frame start signal as the current refresh rate of the display panel.
In some exemplary embodiments, the power signal management module is further 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, and then 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: the voltage value of the driving signal of the common electrode of the display panel is updated in the blanking period of the current frame of the display panel.
In some exemplary embodiments, the common voltage adjustment module is further configured to control the power signal management module to maintain a voltage value of the driving signal of the common electrode of the display panel unchanged when the target refresh rate is the same as the current refresh rate.
In some exemplary embodiments, the apparatus for improving screen flicker further includes: the public voltage stored value table building module;
the public voltage stored value table establishing module is configured to determine 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 public voltage stored value table; wherein the public voltage stored value table comprises N+1 records, and the 1 st record is used for storing the frequency value f of the reference refresh rate 0 And the corresponding common voltage adjustment amount 0, the (i+1) th record is used for storing the (i)Frequency value f of non-reference refresh rate to be measured i And the corresponding common voltage adjustment amount DeltaV i ；ΔV i ＝V i -V ref ；V i Is the ith non-reference refresh rate f to be measured i Corresponding common voltage value V ref Is a common voltage reference value; i is more than or equal to 1 and N is more than or equal to N.
In some exemplary embodiments, the common voltage stored value table creation module is configured to create and store the common voltage stored value table in the following manner: for the ith non-reference refresh rate f to be measured i Testing M display panels at the non-reference refresh rate f i Under-matched common voltage value V ij Determining that any display panel is at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij ：ΔV ij ＝V ij -V ref The method comprises the steps of carrying out a first treatment on the surface of the Setting M display panels at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij As the i-th non-reference refresh rate f to be measured i Corresponding common voltage adjustment quantity DeltaV i ；
Generating an (i+1) th record of a common voltage stored value table, wherein the (i+1) th record is used for recording an (i) th non-reference refresh rate f to be measured i Frequency value of (a) and corresponding common voltage adjustment amount DeltaV i The method comprises the steps of carrying out a first treatment on the surface of the I is more than or equal to 1 and less than or equal to N, 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 value table is used for storing the frequency value f of the reference refresh rate 0 And a corresponding common voltage adjustment amount 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 may generate various voltage signals required by the driving circuit from the multiple power signals through DC-DC conversion.
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 internal to the power management circuit. The common voltage regulation module may send data to the power signal management module via the communication interface. The interface through which the two communicate may be an IIC (integrated circuit bus) communication interface or other interface.
The embodiment of the application also provides a display device which comprises the device for improving screen flicker.
The display device may be a liquid crystal display device. The display device may be: any product or component with 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 will be understood by those skilled in the art, and are not described herein in detail, nor should they be considered as limiting the invention.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the 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 cooperatively by several physical components. 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 both 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 known to those skilled 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 be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, 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.
While the embodiments disclosed in the present disclosure are described above, the embodiments are only employed for facilitating understanding of the present disclosure, and are not intended to limit the present disclosure. Any person skilled in the art to which this disclosure pertains will appreciate that numerous modifications and changes in form and details can be made without departing from the spirit and scope of the disclosure, but the scope of the disclosure is to be determined by the appended claims.

Claims (10)

1. A method of improving screen flicker, comprising:
detecting a target refresh rate and a current refresh rate of the display panel;
when the target refresh rate is different from the current refresh rate, inquiring a public voltage stored value table according to the target refresh rate to acquire a public voltage regulating quantity corresponding to the target refresh rate, and taking the sum of a public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage regulating quantity corresponding to the target refresh rate as a public voltage value corresponding to the target refresh rate;
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 public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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. A method of improving screen flicker as recited in claim 1, wherein:
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 =1/t 1; taking the frequency of the target frame start 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 =1/t 0; and taking the frequency of the current frame start signal as the current refresh rate of the display panel.
3. A method of improving screen flicker as recited in claim 1, wherein:
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 comprises:
the updated voltage value of the driving signal of the common electrode of the display panel is saved.
4. A method of improving screen flicker as recited in claim 1, wherein:
the method further comprises the steps of: when the target refresh rate is the same as the current refresh rate, the voltage value of the driving signal of the common electrode of the display panel is kept unchanged.
5. A method of improving screen flicker as recited in 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, comprising: the voltage value of the driving signal of the common electrode of the display panel is updated in the blanking period of the current frame of the display panel.
6. A method of improving screen flicker as recited in claim 1, wherein:
the method for improving 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 public voltage stored value table; wherein the common voltage stored value 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 adjustment quantity 0, and the i+1 record is used for storing the frequency value f of the i-th non-reference refresh rate to be tested i And the corresponding common voltage adjustment amount DeltaV i ；
ΔV i ＝V i -V ref ；
V i Is the ith non-reference refresh rate f to be measured i Corresponding common voltage value V ref Is a common voltage reference value; i is more than or equal to 1 and N is more than or equal to N.
7. The method for improving screen flicker as recited in claim 6, wherein:
the establishing and storing the public voltage stored value table comprises the following steps:
for the ith non-reference refresh rate f to be measured i Testing M display panels at the non-reference refresh rate f i Under-matched common voltage value V ij Determining that any display panel is at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij ：ΔV ij ＝V ij -V ref The method comprises the steps of carrying out a first treatment on the surface of the Setting M display panels at a non-reference refresh rate f i The common voltage adjustment amount DeltaV ij As the i-th non-reference refresh rate f to be measured i Corresponding common voltage adjustment quantity DeltaV i ；
Generating an (i+1) th record of a common voltage stored value table, wherein the (i+1) th record is used for recording an (i) th non-reference refresh rate f to be measured i Frequency value of (a) and corresponding common voltage adjustment amount DeltaV i The method comprises the steps of carrying out a first treatment on the surface of the I is more than or equal to 1 and less than or equal to N, 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 stored value table is used for storing the frequency value of the reference refresh rate and the corresponding common voltage adjustment quantity 0.
8. An apparatus for improving screen flicker, comprising:
the signal detection module is configured to detect a target refresh rate and a current refresh rate of the display panel;
the public voltage regulating module is configured to query a public voltage stored value table according to the target refresh rate to acquire a public voltage regulating 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 public voltage reference value corresponding to the reference refresh rate of the display panel and the public voltage regulating quantity corresponding to the target refresh rate as a public voltage value corresponding to the target refresh rate;
a power signal management module 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;
the public voltage stored value table stores public voltage adjustment amounts corresponding to a plurality of refresh rates; the common voltage adjustment amount corresponding to any one refresh rate is a 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 as recited in claim 8, wherein:
the device for improving screen flicker further comprises: the public voltage stored value table building module;
the public voltage stored value table establishing module is configured to determine 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 public voltage stored value table; wherein the public voltage stored value table comprises N+1 records, and the 1 st record is used for storing the frequency value f of the reference refresh rate 0 And the corresponding common voltage regulating quantity 0, the (i+1) th record is used for storing the frequency value f of the (i) th non-reference refresh rate to be tested i And the corresponding common voltage adjustment amount DeltaV i ；ΔV i ＝V i -V ref ；V i Is the ith non-reference refresh rate f to be measured i Corresponding common voltage value V ref Is a common voltage reference value; i is more than or equal to 1 and N is more than or equal to N.
10. A display device comprising the device for improving screen flicker of any of claims 8-9.
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 CN113674713A (en) 2021-11-19
CN113674713B true 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)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114299891B (en) * 2021-12-23 2023-04-25 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101346756A (en) * 2006-06-13 2009-01-14 松下电器产业株式会社 Gray-scale correcting device
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004101581A (en) * 2002-09-04 2004-04-02 Koninkl Philips Electronics Nv Image display device
CN101383128B (en) * 2007-09-07 2010-11-17 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
CN105355185B (en) * 2015-12-14 2018-08-03 厦门天马微电子有限公司 Driving circuit, display device and its driving method of display panel
WO2018000407A1 (en) * 2016-07-01 2018-01-04 Intel Corporation Display controller with multiple common voltages corresponding to multiple refresh rates
US10359885B2 (en) * 2016-08-29 2019-07-23 Apple Inc. Touch induced flicker mitigation for variable refresh rate display
CN107039013B (en) * 2017-05-25 2020-03-10 上海中航光电子有限公司 Display driving circuit board, driving method thereof and display device
CN107464540B (en) * 2017-09-26 2020-03-27 京东方科技集团股份有限公司 Liquid crystal display, display panel and VCOM voltage control method and device thereof
KR20210010736A (en) * 2019-07-18 2021-01-28 삼성디스플레이 주식회사 Method of driving display panel and display apparatus for performing the method
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101346756A (en) * 2006-06-13 2009-01-14 松下电器产业株式会社 Gray-scale correcting device
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
通过可变帧率优化显示图像质量和功耗;Jason Lu;;电子产品世界(09);全文 *

Also Published As

Publication number Publication date
CN113674713A (en) 2021-11-19

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
US9208735B2 (en) Voltage adjustment method and apparatus of liquid crystal display panel
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
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
CN101211543B (en) Liquid crystal device driving circuit and method
US20080278471A1 (en) Liquid crystal display with common voltage compensation and driving method thereof
CN1987620B (en) Liquid crystal display and its compensating feed through voltage method
US11455966B2 (en) Correction method for display panel and display device
CN109637496B (en) Liquid crystal display device and driving method thereof
US8299991B2 (en) Display driver method and apparatus
WO2019174359A1 (en) Voltage compensation method and apparatus, and touch display module
CN210136714U (en) Common voltage driving circuit and display device
US20210327370A1 (en) Image processing method and device, display device and computer-readable storage medium
CN114299891B (en) Display panel driving method, driver and display device
US20190088202A1 (en) Display apparatus and driving method thereof
CN106531093A (en) Liquid crystal display device driving method and liquid crystal display device
US20120169706A1 (en) Gate drive method and gate drive device of liquid crystal display
US20050116910A1 (en) Video signal regulating module and method for mitigating flicker of an LCD device
CN109036315A (en) Driving method, driving device and the display equipment of display panel
KR20160031597A (en) Method of testing display apparatus and display apparatus tested by the same
CN102867496A (en) Public electrode voltage compensation circuit, array substrate and display
CN109444606B (en) Charging test method and charging test device
KR101598219B1 (en) Display driver method and apparatus

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