CN110570828B - Display panel brightness adjusting method, device and equipment and readable storage medium - Google Patents
Display panel brightness adjusting method, device and equipment and readable storage medium Download PDFInfo
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- CN110570828B CN110570828B CN201910860758.5A CN201910860758A CN110570828B CN 110570828 B CN110570828 B CN 110570828B CN 201910860758 A CN201910860758 A CN 201910860758A CN 110570828 B CN110570828 B CN 110570828B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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Abstract
The application provides a method, a device and equipment for adjusting the brightness of a display panel and a readable storage medium, wherein the method comprises the following steps: acquiring display frame data, and determining the vertical blanking time of the display frame data; when the vertical blanking time reaches a preset vertical blanking time threshold value, increasing pixel voltage corresponding to display frame data; and outputting the increased pixel voltage so that the display frame data is displayed according to the increased pixel voltage. According to the method and the device, the vertical blanking time in the acquired display frame data is counted, the pixel voltage corresponding to the display frame data is determined according to the length of the vertical blanking time, when the length of the vertical blanking time reaches an electric leakage condition, the pixel voltage is increased to complement the problem of electric leakage of the TFT, so that the problem of flicker of brightness and darkness of a picture is avoided, and the display effect is guaranteed.
Description
Technical Field
The present application relates to the field of display, and in particular, to a method, an apparatus, a device, and a readable storage medium for adjusting brightness of a display panel.
Background
The liquid crystal display is limited by a Thin Film Transistor (TFT) structure, generally speaking, the TFT is a Hold-Type (steady state driving) technology, and unless the power supply is turned off, the backlight module is in a light-emitting state at any time and will not change with the brightness of the picture. Data is stored in a specific capacitor, and the liquid crystal voltage is maintained until the next frame is updated, but actually due to the characteristics of the manufacturing process, the capacitor has a leakage problem, so that the TFT leakage is caused under a Low refresh rate (Low frame rate), and the gray scale which should be correctly displayed cannot be correctly displayed, thereby causing the problem of bright and dark flickers of the frame and affecting the display effect.
Disclosure of Invention
Accordingly, to solve at least one of the above-mentioned problems, the present application provides a method, an apparatus, a device and a readable storage medium for adjusting brightness of a display panel.
In a first aspect, the present application provides a method for adjusting brightness of a display panel, including:
acquiring display frame data and determining the vertical blanking time of the display frame data;
when the vertical blanking time reaches a preset vertical blanking time threshold value, increasing pixel voltage corresponding to display frame data;
And outputting the increased pixel voltage, so that the display panel displays the display frame data according to the increased pixel voltage.
With reference to the first aspect, in certain implementations of the first aspect, increasing the pixel voltage corresponding to the display frame data includes:
acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold;
determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference;
and determining the pixel voltage according to the gray scale voltage increment.
With reference to the first aspect and the foregoing implementation manners, in some implementation manners of the first aspect, increasing a pixel voltage corresponding to display frame data includes:
acquiring a vertical blanking time difference value between vertical blanking time and a preset vertical blanking time threshold;
determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference;
and determining the pixel voltage according to the charging time increment value.
With reference to the first aspect and the foregoing implementations, in some implementations of the first aspect, the timing signal includes a first level and a second level; determining a charging time increment of a time sequence signal corresponding to the display frame data according to the vertical blanking time difference, comprising:
Increasing the duration of one of the first level or the second level according to the vertical blanking time difference; the increased duration is added as the charging time.
In a second aspect, the present application provides a display panel brightness adjusting apparatus, including:
the acquisition module is used for acquiring display frame data and determining the vertical blanking time of the display frame data;
the voltage adjusting module is used for increasing the pixel voltage corresponding to the display frame data when the vertical blanking time reaches a preset vertical blanking time threshold value;
and the output module is used for outputting the increased pixel voltage so that the display panel displays the display frame data according to the increased pixel voltage.
With reference to the second aspect, in certain implementations of the second aspect, the voltage regulation module includes:
the voltage increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the gray scale voltage increment.
With reference to the second aspect and the foregoing implementations, in some implementations of the second aspect, the voltage regulation module includes:
The time increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the charging time increment value.
In a third aspect, the present application provides a display panel luminance adjusting apparatus, comprising:
the time sequence controller comprises a frame image buffer and a vertical blanking time determiner which are connected with each other, wherein the frame image buffer is used for storing the acquired display frame data, and the vertical blanking time determiner is used for determining the vertical blanking time of the display frame data;
the driving integrated circuit is electrically connected with the time sequence controller and used for increasing the pixel voltage corresponding to the display frame data when the vertical blanking time is determined to meet the preset vertical blanking time threshold value; and outputting the increased pixel voltage, so that the display panel displays the display frame data according to the increased pixel voltage.
With reference to the third aspect and the foregoing implementation manners, in some implementation manners of the second aspect, the timing controller further includes a transmitting terminal and a control timing generator; the driving integrated circuit includes: a source drive integrated circuit and a gate drive integrated circuit;
The transmitting terminal is respectively electrically connected with the frame image buffer and the vertical blanking time determiner, and the source drive integrated circuit is electrically connected with the transmitting terminal;
the source drive integrated circuit is used for acquiring a vertical blanking time difference value between vertical blanking time and a preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; determining pixel voltage according to the gray scale voltage increment;
the control timing generator is electrically connected with the vertical blanking time determiner, and the gate drive integrated circuit is electrically connected with the control timing generator;
the grid driving integrated circuit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the charging time increment value.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored, the computer program being executed by a computer to implement the method for adjusting brightness of a display panel provided in the first aspect of the present application.
Compared with the prior art, the scheme of the application has the following beneficial technical effects:
According to the method and the device, the vertical blanking time in the acquired display frame data is counted, the pixel voltage corresponding to the display frame data is determined according to the length of the vertical blanking time, when the length of the vertical blanking time reaches an electric leakage condition, the pixel voltage is increased to complement the problem of electric leakage of the TFT, so that the problem of flicker of brightness and darkness of a picture is avoided, and the display effect is guaranteed.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for adjusting brightness of a display panel according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a specific method of S200 according to an embodiment of the present application;
fig. 3 is a flowchart of a specific method of S200 according to another embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a method for adjusting brightness of a display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a display panel brightness adjustment apparatus according to an embodiment of the present application;
Fig. 6 is a schematic structural diagram of a display panel brightness adjusting apparatus provided in an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.
Several terms referred to in this application will first be introduced and explained:
frame buffer, Frame image buffer.
Cst, storage capacitor.
Vblank count, vertical blanking interval count, vertical blanking time determiner.
Tcon, and a time schedule controller.
Source IC, Source driver IC.
Gate IC, Gate drive integrated circuit.
OE, output enable, outputs an enable signal.
GOA, Gate driver On Array, Array substrate row driver.
The CTG, Control Timing Generator, controls the Timing Generator.
A first aspect of the present application provides a method for adjusting brightness of a display panel, as shown in fig. 1, including:
s100: and acquiring display frame data, and determining the vertical blanking time of the display frame data.
When the system acquires display frame Data, which may be a series of frame Data, and the input Data corresponding to animation, i.e. Data input in fig. 4, enters the system, the statistical calculation is performed on the vertical blanking time in the display frame Data. In the field of image display, during scanning for converting an optical signal into an electrical signal, scanning always starts from the upper left corner of an image, advances horizontally forward, while the scanning spot also moves downward at a slower rate. When the scanning point reaches the right edge of the image, the scanning point quickly returns to the left and starts scanning of a new frame, and the time interval is called vertical blanking time. At low refresh rates, the vertical blanking time is too long, which may cause TFT leakage and result in insufficient gray scale, so it is necessary to count the vertical blanking time of each frame of display frame data in order to determine whether the vertical blanking time is too long.
S200: and when the vertical blanking time reaches the preset vertical blanking time threshold value, increasing the pixel voltage corresponding to the display frame data.
The maximum vertical blanking time is determined for specific equipment, when the maximum vertical blanking time is exceeded, TFT electric leakage is easy to occur, the maximum vertical blanking time is used as a preset vertical blanking time threshold, whether the pixel voltage corresponding to the display frame data is increased or not is determined according to whether the maximum vertical blanking time reaches or exceeds the preset vertical blanking time threshold, so that the possible TFT electric leakage is compensated, and the phenomenon that display is influenced by insufficient gray scale is prevented.
S300: and outputting the increased pixel voltage, so that the display panel displays the display frame data according to the increased pixel voltage.
And once the phenomenon that the vertical blanking time of the display frame data to be displayed exceeds a preset vertical blanking time threshold value occurs, determining the increasing degree of the pixel voltage corresponding to the display frame data according to the size of the vertical blanking time exceeding the preset vertical blanking time threshold value. And outputting the increased pixel voltage so that the display frame data can be displayed according to the increased pixel voltage, and even under the condition that the TFT leaks electricity, the display frame data still has enough pixel voltage to maintain the stability of the display.
According to the display panel brightness adjusting method, the vertical blanking time in the obtained display frame data is counted, the pixel voltage corresponding to the display frame data is determined according to the length of the vertical blanking time, and once the length of the vertical blanking time reaches an electric leakage condition, measures are taken to increase the pixel voltage, so that the pixel voltage is too low due to the fact that TFT electric leakage is complemented, the problem that the brightness change of a picture flickers is avoided, and the display effect is guaranteed.
In one possible embodiment of the present application, as shown in fig. 2, increasing the pixel voltage corresponding to the display frame data specifically includes:
s210: and acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold value.
S220: and determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference.
S230: and determining the pixel voltage according to the gray scale voltage increment.
The embodiment provides a mode for directly improving the pixel voltage, when the vertical blanking time exceeds a preset vertical blanking time threshold, the difference value of the two is obtained through calculation, namely the vertical blanking time difference value, and the exceeding degree of the vertical blanking time can be measured. According to the exceeding degree, the gray scale voltage increment which needs to be increased is determined, so that the voltage value which needs to be additionally increased of the pixel voltage is determined according to the gray scale voltage increment in a manner of increasing the charging voltage, such as Data increment in the source out of the B stage shown in fig. 4, and finally the pixel voltage corresponding to the display frame Data is determined.
In another possible embodiment, as shown in fig. 3 and 4, increasing the pixel voltage corresponding to the display frame data includes:
s210': and acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold value.
S220': and determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference.
S230': and determining the pixel voltage according to the charging time increment value.
This embodiment provides another possible way to increase the charging time in order to finally increase the pixel voltage. And acquiring the exceeding degree of the vertical blanking time according to the vertical blanking time difference so as to determine the charging time required to be increased, wherein the time sequence signal corresponding to the display frame data does not only have a charging signal, namely is not completely in a charging state. In a period of displaying frame data, a scan time is further included, and increasing the charge time in one period and decreasing the scan time can increase the pixel voltage, as shown in the B stage in fig. 4.
In addition, the numbers 1, 2, 3, and 4 shown in fig. 4 represent the first frame display frame data (1)stframe), second frame display frame data, third frame display frame data, and fourth frame display frame data, and so on. The Tcon clock represents the timing controller clock, which measures time uniformly. V-total represents the period corresponding to one frame of display frame data, including both scanning time and vertical blanking time.
In a particular embodiment, the timing signal particularly comprises a first level and a second level. As shown in fig. 4, determining the increment of the charging time of the timing signal corresponding to the display frame data according to the vertical blanking time difference includes:
increasing the duration of one of the first level or the second level according to the vertical blanking time difference; the increased duration is added as the charging time.
For different kinds of TFTs, there are some that are charged at the first level and some that are charged at the second level, but charging is not performed at both the first level and the second level at the same time. For example, when the TFT is a P-type TFT, the first level is a low level, and the first level is a level at which the TFT is turned on; when the TFT is an N-type TFT, the second level is a high level, and the second level is a level at which the TFT is turned on. The TFT is turned on to charge Cst.
One of the two manners for increasing the pixel voltage may be selected, for example, the line a in fig. 6 or the line b in fig. 6, or the two manners may be combined to increase the charging voltage and increase the charging time increment in the timing signal, so that the pixel voltage can be increased with a smaller charging time increment range.
The second aspect of the present application provides a display panel brightness adjusting apparatus 10, as shown in fig. 5, including an obtaining module 11, a voltage regulating module 12, and an output module 13.
The obtaining module 11 is configured to obtain display frame data and determine a vertical blanking time of the display frame data.
The voltage adjusting module 12 is configured to increase a pixel voltage corresponding to the display frame data when it is determined that the vertical blanking time reaches a preset vertical blanking time threshold.
The output module 13 is configured to output the increased pixel voltage, so that the display panel displays the display frame data according to the increased pixel voltage.
The application provides a display panel brightness adjustment device is through making statistics of the vertical blanking time in the display frame data that acquires, decides the pixel voltage height that the display frame data corresponds according to vertical blanking time length size, in case the length of vertical blanking time reaches the electric leakage condition, just takes measures to increase pixel voltage to it leads to pixel voltage to hang down to supply the TFT electric leakage, thereby avoids appearing the problem that the bright dark change of picture flickers, guarantees the display effect.
In one possible embodiment, the voltage regulation module 12 includes:
the voltage increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the gray scale voltage increment.
In another possible embodiment, the voltage regulation module 12 includes:
the time increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining the increment of the charging time of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the charging time increment.
In a specific embodiment, the determining, by the voltage adjusting module 12, the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference specifically includes: increasing the duration of one of the first level or the second level according to the vertical blanking time difference; the increased duration is added as the charging time.
Based on the same inventive concept, the present application provides a display panel luminance adjusting apparatus, as shown in fig. 6, including a timing controller and a driving integrated circuit.
The time sequence controller comprises a frame image buffer, a vertical blanking time determiner and the like which are connected with each other, wherein the frame image buffer is used for storing the acquired display frame data, and the vertical blanking time determiner is used for determining the vertical blanking time of the display frame data.
And the driving integrated circuit is electrically connected with the time sequence controller and used for increasing the pixel voltage corresponding to the display frame data and outputting the increased pixel voltage when the vertical blanking time is determined to meet the preset vertical blanking time threshold value, so that the display panel displays the display frame data according to the increased pixel voltage.
The application provides a display panel brightness adjustment equipment can at first save the display frame data of inputing in the middle of the system, and to the display frame data of storage, carry out the statistics of vertical blanking time, judge whether need to improve the pixel voltage that display frame data correspond according to vertical blanking time length, in case the length of vertical blanking time reaches the electric leakage condition, just take measures to increase pixel voltage, thereby it leads to pixel voltage to hang down to supply the TFT electric leakage, avoid appearing the problem that the change of bright dark change of picture flickers, the final technological effect that realizes well display frame data of inputing in the middle of the system on display panel.
In one possible embodiment, the timing controller further includes a transmitting terminal and a control timing generator; the driving integrated circuit includes: a source drive integrated circuit and a gate drive integrated circuit.
The transmitting terminal is respectively electrically connected with the frame image buffer and the vertical blanking time determiner, and the source drive integrated circuit is electrically connected with the transmitting terminal. The source drive integrated circuit is used for acquiring a vertical blanking time difference value between vertical blanking time and a preset vertical blanking time threshold; determining gray scale voltage increment corresponding to display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the gray scale voltage increment.
The control timing generator is electrically connected with the vertical blanking time determiner, and the gate drive integrated circuit is electrically connected with the control timing generator. The grid driving integrated circuit is used for acquiring a vertical blanking time difference value between the vertical blanking time and a preset vertical blanking time threshold; determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; and determining the pixel voltage according to the charging time increment value.
How to solve the problem of brightness flicker of the dynamic refresh rate of the display panel by the method for adjusting the brightness of the display panel in detail is described below with reference to fig. 4 and 6:
the system acquires Data, such as Data input in fig. 6, which is display frame Data, and may be one frame or a series of multi-frame display frame Data. And entering into the Frame buffer to be stored. The vertical blanking time in the display frame data is calculated by the Vblanking Count, for example, Count Vblanking time (Count vertical blanking time) in fig. 4, enters the transmitter TX through an a path, the display frame data (i.e., Tcon data Out in fig. 4 or Tcon Out in fig. 6) enters the source driver ic through the transmitter TX through a point-to-point interface, and meanwhile, the data acquired by the Vblanking Count is also transmitted and enters the source driver ic through a b path. The source driver ic determines a charging time increment of a timing signal corresponding to the Display frame data according to a vertical blanking time difference between a vertical blanking time and a preset vertical blanking time threshold, and then determines a pixel voltage, so as to output the Display frame data and a corresponding pixel voltage to a Display panel, such as a TFT LCD (Liquid Crystal Display), in which the previously input Display frame data is displayed according to the pixel voltage.
In the above processing process, there may also be an information transmission line b, data acquired by the Vblanking count is transmitted to the CTG, the data is transmitted to the gate driver integrated circuit after being converted by the CTG, the gate driver integrated circuit determines the increment of the charging time of the timing signal corresponding to the display frame data according to the vertical blanking time difference, and further determines the pixel voltage, determines the time length for turning on the TFT, and in the state where the TFT is turned on, allows the current to be transmitted from the power supply of the TFT to the electrode on the liquid crystal cell side of the TFT and the Cst, so as to charge the Cst, thereby compensating for the leakage of the TFT, resulting in the pixel voltage being too low, and solving the problem of flicker of the luminance at the dynamic refresh rate of the display panel.
Since the Frame Data is stored in the Frame buffer and counted for the vertical blanking time, and the adjustment of the pixel voltage is performed in the subsequent steps, the Data input and Source out and the OE/GOA signals shown in fig. 4 are corresponding to each other, but the processing of the same Frame Data is not performed synchronously.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored, the computer program being executed by a computer to implement the method for adjusting brightness of a display panel provided in the first aspect of the present application.
The computer program stored in the computer-readable storage medium provided by the present application can be used for executing the display panel brightness adjustment method provided by the first aspect of the present application by a computer, and can display the vertical blanking time included in the frame data, and determine whether the pixel voltage corresponding to the display frame data needs to be increased, and once the length of the vertical blanking time reaches the electric leakage condition, measures are taken to increase the pixel voltage, so as to compensate the pixel voltage which is too low due to the electric leakage of the TFT, thereby avoiding the problem of flickering of the brightness change of the picture, and finally realizing the technical effect of well displaying the display frame data input into the system on the display panel.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Alternatively, various other operations, methods, steps in a process, acts, or schemes that have been discussed in this application may be alternated, modified, rearranged, decomposed, combined, or eliminated.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A method for adjusting the brightness of a display panel is characterized by comprising the following steps:
acquiring display frame data, and determining the vertical blanking time of the display frame data;
when it is determined that the vertical blanking time reaches a preset vertical blanking time threshold, increasing a pixel voltage corresponding to the display frame data, including: acquiring a vertical blanking time difference value between the vertical blanking time and the preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the gray scale voltage increment; or determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the charging time increment; the vertical blanking time threshold is related to the electric leakage degree of the thin film transistor; the determining, according to the vertical blanking time difference, a charging time increment of a timing signal corresponding to the display frame data includes: increasing the duration of one of the first level or the second level according to the vertical blanking time difference; increasing the duration as a charging time increment, the timing signal including the first level and the second level;
And outputting the increased pixel voltage, so that the display panel displays the display frame data according to the increased pixel voltage.
2. A display panel luminance adjusting apparatus, comprising:
the acquisition module is used for acquiring display frame data and determining the vertical blanking time of the display frame data;
the voltage adjusting module is used for increasing the pixel voltage corresponding to the display frame data when the vertical blanking time is determined to reach a preset vertical blanking time threshold value; the vertical blanking time threshold is related to the electric leakage degree of the thin film transistor; the voltage regulation module includes: a voltage increment unit or a time increment unit; the voltage increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and the preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the gray scale voltage increment; the time increment unit is used for acquiring a vertical blanking time difference value between the vertical blanking time and the preset vertical blanking time threshold; determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the charging time increment; the determining, according to the vertical blanking time difference, a charging time increment of a timing signal corresponding to the display frame data includes: increasing the duration of one of the first level or the second level according to the vertical blanking time difference; increasing the duration as a charging time increment, the timing signal including the first level and the second level;
And the output module is used for outputting the increased pixel voltage so that the display panel displays the display frame data according to the increased pixel voltage.
3. A display panel luminance adjustment apparatus, comprising:
the time sequence controller comprises a frame image buffer and a vertical blanking time determiner which are connected with each other, wherein the frame image buffer is used for storing the acquired display frame data, and the vertical blanking time determiner is used for determining the vertical blanking time of the display frame data;
the driving integrated circuit is electrically connected with the time sequence controller and used for increasing the pixel voltage corresponding to the display frame data when the vertical blanking time is determined to meet a preset vertical blanking time threshold value; outputting the increased pixel voltage to enable a display panel to display the display frame data according to the increased pixel voltage; the vertical blanking time threshold is related to the electric leakage degree of the thin film transistor;
the time sequence controller also comprises a transmitting end and a control timing generator; the driving integrated circuit includes: a source drive integrated circuit and a gate drive integrated circuit;
the transmitting terminal is respectively electrically connected with the frame image buffer and the vertical blanking time determiner, and the source drive integrated circuit is electrically connected with the transmitting terminal;
The source drive integrated circuit is used for acquiring a vertical blanking time difference value between the vertical blanking time and the preset vertical blanking time threshold; determining gray scale voltage increment corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the gray scale voltage increment;
the control timing generator is electrically connected with the vertical blanking time determiner, and the gate drive integrated circuit is electrically connected with the control timing generator;
the gate drive integrated circuit is used for acquiring a vertical blanking time difference value between the vertical blanking time and the preset vertical blanking time threshold; determining the charging time increment of the time sequence signal corresponding to the display frame data according to the vertical blanking time difference; determining the pixel voltage according to the charging time increment; the determining, according to the vertical blanking time difference, a charging time increment of a timing signal corresponding to the display frame data includes: increasing the duration of one of the first level or the second level according to the vertical blanking time difference; and increasing the duration as a charging time, wherein the time sequence signal comprises the first level and the second level.
4. A computer-readable storage medium, in which a computer program is stored, the computer program being executed by a computer to implement the display panel luminance adjustment method according to claim 1.
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| CN111816133A (en) * | 2020-07-07 | 2020-10-23 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display and leakage compensation method thereof |
| CN112419959B (en) * | 2020-12-08 | 2022-04-08 | 深圳市华星光电半导体显示技术有限公司 | Gamma voltage correction method and device and display device |
| CN113658565A (en) * | 2021-08-30 | 2021-11-16 | 深圳市华星光电半导体显示技术有限公司 | Display panel and electronic device |
| CN114283750A (en) * | 2021-12-22 | 2022-04-05 | Tcl华星光电技术有限公司 | Display device and display method thereof |
| WO2023142001A1 (en) * | 2022-01-28 | 2023-08-03 | 华为技术有限公司 | Method and apparatus for compensating for brightness of display panel, and device |
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