CN117496893A - Method, related device and storage medium for improving smear layering phenomenon - Google Patents

Method, related device and storage medium for improving smear layering phenomenon Download PDF

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Publication number
CN117496893A
CN117496893A CN202311669976.3A CN202311669976A CN117496893A CN 117496893 A CN117496893 A CN 117496893A CN 202311669976 A CN202311669976 A CN 202311669976A CN 117496893 A CN117496893 A CN 117496893A
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China
Prior art keywords
displayed
current frame
driving voltage
frame display
smear
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CN202311669976.3A
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Chinese (zh)
Inventor
黄子文
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Howell Touch And Display Technology Shenzhen Co ltd
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Howell Touch And Display Technology Shenzhen Co ltd
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Priority to CN202311669976.3A priority Critical patent/CN117496893A/en
Publication of CN117496893A publication Critical patent/CN117496893A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275—Details of drivers for data electrodes
    • G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects

Abstract

The disclosure provides a smear layering phenomenon improving method, a related device and a storage medium. The smear layering phenomenon improving method comprises the following steps: according to the driving voltage of the last frame of display picture of the display panel and the driving voltage of the current frame of display picture to be displayed, predicting a predicted smear area which can appear smear phenomenon when the display panel displays the current frame of display picture to be displayed, dividing the predicted smear area into a plurality of blocks in the motion direction of a moving object in the last frame of display picture and the current frame of display picture to be displayed, calculating the compensation voltage value of the driving voltage of the block of the current frame of display picture to be displayed, compensating the driving voltage of the corresponding block according to the compensation voltage value, and providing the driving voltage of the compensated current frame of display picture to be displayed for the display panel so as to control the display panel to display the current frame of display picture to be displayed, thereby weakening the layered smear effect generated in the predicted smear area when the display panel displays the current frame of display picture.

Description

Method, related device and storage medium for improving smear layering phenomenon
Technical Field
The disclosure belongs to the technical field of display, and in particular relates to a smear layering phenomenon improving method, a related device and a storage medium.
Background
In the OLED display panel, the brightness and color of the pixel can be adjusted by controlling the magnitude of the driving voltage of the pixel. When the display screen of the OLED display panel is switched, some pixels need to be switched from the color of the previous frame display screen to another color of the current frame display screen, and some pixels may not be completely switched to the new color, so that the image of the previous frame display screen still remains in the current frame display screen, and a smear region is generated when the OLED display panel displays the current frame display screen. Moreover, in some special application scenarios, such as low brightness, the driving voltage of the pixels in the OLED display panel is low, and the response speed of the pixels in the OLED display panel is slow due to the electrical characteristics of the light emitting materials of the OLED, so that the response is insufficient, and in the case that the OLED display panel displays dynamic video or animation, a gradual effect (i.e. a smear layering phenomenon) that a smear region is changed from bright to dark is continuously observed in the display panel. In the related art, the smear layering phenomenon may be improved by reducing the display frame rate of the display panel, but a lower display frame rate may cause a decrease in the smoothness of the display screen of the OLED display panel. An overdrive compensation mode for the current frame display picture can be adopted, and the smear area is uniformly driven and compensated in the next frame display picture to improve the smear, but the visual influence caused by the smear layering phenomenon cannot be improved. Therefore, it is desirable to provide a method for improving the smear delamination phenomenon, so as to improve the smear delamination phenomenon from the visual effect and improve the display quality of the display screen without affecting the smoothness of the display screen of the OLED display panel.
Disclosure of Invention
In view of the foregoing, the present disclosure provides a method, a related device, and a storage medium for improving a smear layering phenomenon, which aim to implement different gray-scale compensation for each block of a predicted smear region, so that pixels in each block visually display a visual effect consistent with a target display gray-scale of a corresponding pixel in a corresponding block of a current frame display to be displayed of a display panel when the display panel displays a current frame display, thereby weakening the smear layering effect generated in the predicted smear region when the display panel displays the current frame display, and improving the display quality of the display panel.
According to a first aspect of the present disclosure, there is provided a smear delamination phenomenon improvement method for a display panel, including:
predicting a predicted smear region in which a smear phenomenon occurs when the display panel displays a current frame display picture to be displayed according to a driving voltage of a previous frame display picture of the display panel and a driving voltage of the current frame display picture to be displayed, wherein the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display picture and the current frame display picture to be displayed;
calculating a compensation voltage value of the driving voltage of the block of the current frame display picture to be displayed;
compensating the driving voltage of the corresponding block according to the compensation voltage value;
and providing the compensated driving voltage of the current frame display picture to be displayed for the display panel so as to control the display panel to display the current frame display picture to be displayed.
Optionally, in the motion direction of the moving object in the previous frame display screen and the current frame display screen to be displayed, the further the block is from the display position of the moving object in the previous frame display screen, the larger the compensation voltage value corresponding to the block is.
Optionally, the driving voltage of the pixel of the previous frame of display screen is smaller than the driving voltage of the pixel of the corresponding position of the current frame of display screen to be displayed, and predicting, according to the driving voltage of the previous frame of display screen of the display panel and the driving voltage of the current frame of display screen to be displayed, a predicted smear region in which a smear phenomenon occurs when the display panel displays the current frame of display screen to be displayed includes:
calculating a difference value between the driving voltage of the pixel of the previous frame display picture and the driving voltage of the pixel at the corresponding position of the current frame display picture to be displayed;
and determining a first pixel, in the current frame display picture to be displayed, of which the difference value is larger than a preset threshold value, wherein the first pixel forms the prediction smear region.
Optionally, before the calculating the compensation voltage value of the driving voltage of the block of the current frame display screen to be displayed, the smear phenomenon improving method further includes:
and comparing the display positions of the moving object in the previous frame display picture and the current frame display picture to be displayed, and determining the moving direction of the moving object in the previous frame display picture and the current frame display picture to be displayed.
Optionally, the calculating the compensation voltage value of the driving voltage of the block of the current frame display screen to be displayed includes:
calculating a difference value between a driving voltage of the pixel of the block and a driving voltage of the pixel of the corresponding position of the previous frame display picture for the pixel of the same position;
determining an initial compensation voltage value for compensating for a driving voltage of the pixels of the block based on the difference value and a target display gray level of the pixels of the block;
multiplying the initial compensation voltage value by a compensation gain corresponding to the block to obtain a compensation voltage value for compensating the driving voltage of the pixels of the block;
in the motion direction of the moving object in the previous frame display picture and the current frame display picture to be displayed, the more the block is far from the display position of the moving object in the previous frame display picture, the larger the compensation gain corresponding to the block is.
Optionally, the compensating the driving voltage of the corresponding block according to the compensating voltage value includes:
adding the compensation voltage value corresponding to the block with the driving voltage of the block to obtain the compensation driving voltage of the block;
wherein, for the pixels at the same position, the compensation driving voltage is greater than the driving voltage of the pixels of the block.
According to a second aspect of the present disclosure, there is provided a smear delamination phenomenon improving apparatus for a display panel, including:
a smear region prediction unit, configured to predict a predicted smear region in which a smear phenomenon occurs when the display panel displays a current frame display picture to be displayed according to a driving voltage of a previous frame display picture of the display panel and a driving voltage of the current frame display picture to be displayed, where the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display picture and the current frame display picture to be displayed;
a compensation voltage value calculating unit, configured to calculate a compensation voltage value of a driving voltage of the block of the current frame display screen to be displayed;
the driving voltage compensation unit is used for compensating the driving voltage of the corresponding block according to the compensation voltage value;
and the driving voltage output unit is used for providing the compensated driving voltage of the current frame display picture to be displayed for the display panel so as to control the display panel to display the current frame display picture to be displayed.
According to a third aspect of the present disclosure, there is provided a display device including:
a display panel provided with a plurality of pixel units arranged in an array;
a gate driving circuit for generating a scan signal according to the received timing control signal, the scan signal being supplied to each row of pixel units through a scan line;
the source electrode driving circuit is used for generating driving voltage of a previous frame of display picture of the display panel and driving voltage of a current frame of display picture to be displayed according to the received time sequence control signals, gamma voltages and input data;
the smear layering phenomenon improving device is used for receiving the driving voltage of the last frame of display picture of the display panel and the driving voltage of the current frame of display picture to be displayed, compensating the driving voltages of a plurality of blocks of the predicted smear region of the current frame of display picture to be displayed, and sending the compensated driving voltage of the current frame of display picture to be displayed to each row of pixel units through a data line so as to control the display panel to display the current frame of display picture to be displayed.
According to a fourth aspect of the present disclosure, there is provided an electronic device comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method as described above.
According to a fifth aspect of the present disclosure there is provided a storage medium having stored thereon a computer program or instructions which when executed by a processor, implement the steps of the method as described above.
The present disclosure brings the following beneficial effects:
according to the method for improving the smear layering phenomenon, a predicted smear region of the smear phenomenon occurs when the display panel displays a current frame display picture to be displayed according to the driving voltage of the last frame display picture of the display panel and the driving voltage of the current frame display picture to be displayed, the predicted smear region is divided into a plurality of blocks in the moving direction of a moving object in the last frame display picture and the current frame display picture to be displayed, then compensation voltage values of the driving voltages of all the blocks of the current frame display picture to be displayed are calculated, the driving voltages of the corresponding blocks are compensated according to the compensation voltage values, compensation driving voltages of the corresponding blocks of the current frame display picture to be displayed are obtained, and then the compensated driving voltage of the current frame display picture to be displayed is provided for the display panel to control the display panel to display the current frame display picture to be displayed. In this way, by setting different compensation driving voltages in the prediction smear region in blocks, different gray scale compensation can be performed on each block of the current frame display picture to be displayed, so that the pixels in each block visually display a visual effect consistent with the target display gray scale of the corresponding pixel in the corresponding block of the current frame display picture to be displayed of the display panel when the display panel displays the current frame display picture, thereby weakening the smear layering effect generated in the prediction smear region when the display panel displays the current frame display picture, and improving the display quality of the display picture.
Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the disclosure. The objectives and other advantages of the disclosure will be realized and attained by the structure particularly pointed out in the written description and drawings.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments thereof with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a display device according to an embodiment of the present disclosure;
fig. 2 is a circuit schematic diagram of a pixel unit according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a device for improving smear delamination according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a motion direction of a moving object in two adjacent frame display frames and a predicted smear region in a current frame display frame to be displayed according to an embodiment of the present disclosure;
FIG. 5 is a diagram showing a comparison of a visual effect presented when a current frame display is displayed without improving smear layering, according to an embodiment of the present disclosure;
FIG. 6 is a diagram showing a visual effect presented when a current frame display is displayed before and after improving a smear layering phenomenon according to an embodiment of the present disclosure;
FIG. 7 is a flow chart of a smear delamination phenomenon improvement method provided according to an embodiment of the present disclosure;
fig. 8 illustrates a schematic structure of an electronic device provided according to an embodiment of the present disclosure.
Detailed Description
Various embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts. For clarity, the various features of the drawings are not drawn to scale.
The following terms are used herein:
an organic light-emitting diode (OLED) is a current-type light-emitting device, which is composed of an organic light-emitting material and a pair of electrodes, and has the characteristics of self-luminescence, fast response, wide viewing angle, and being capable of being fabricated on a flexible substrate, etc., so that the organic light-emitting diode is increasingly applied to the technical field of high-performance display.
The OLED display panel comprises pixels which are arranged in an array. Each pixel is composed of three sub-pixels of red (R), green (G), blue (B), corresponding to three basic colors in the RGB color space, respectively. By controlling the brightness of each sub-pixel, display of various colors can be achieved. In some special applications, such as low brightness, the OLED display panel may reduce the driving voltage to reduce the light emission intensity of the OLED of the pixel. The display screen of the display panel refers to an image or content displayed on the display panel. The content may be output signals from a computer, a television, a mobile phone, a tablet computer and other devices, and may be static pictures, dynamic videos or animations.
The smear refers to a phenomenon that when the OLED display panel switches display pictures, the previous frame of display picture remains on the display panel before the current frame of display picture appears, and a smear region is generated when the OLED display panel displays dynamic video or animation (i.e., a moving object with a moving position exists in two adjacent frames of display pictures displayed by the OLED display panel). When switching the display of the OLED display panel at the display frame rate, some pixels need to be switched from the color of the display of the previous frame to another color of the display of the current frame, and this switching needs a certain pixel response time to be completed. If the time interval between two frames of display frames before and after the display panel is switched is smaller than the pixel response time, some pixels may not be completely switched to a new color, so that the image of the previous frame of display frame still remains in the current frame of display frame, and a smear phenomenon is formed. The pixel response time refers to the time required from when an electrical signal is received by a pixel on a display panel to when the pixel completely changes its brightness or color. The display frame rate refers to the number of times the display panel refreshes the display screen per second.
In some special application scenarios, such as low brightness, the driving voltage of the pixels in the OLED display panel is low, and the response speed of the pixels in the OLED display panel is slow due to the electrical characteristics of the light emitting materials of the OLED, so that the response is insufficient, and in the case that the OLED display panel displays dynamic video or animation, a gradual effect (i.e., a smear layering phenomenon) that a smear region is changed from bright to dark is continuously observed in the display panel.
Fig. 1 illustrates a schematic structure of a display device provided according to an embodiment of the present disclosure. As shown in fig. 1, a display device provided in an embodiment of the present disclosure includes: the display panel 110, the source driving circuit 120, the gate driving circuit 130, the timing control circuit 140, the smear delamination improving device 150, and the power chip 160. The display device is illustratively an OLED display device.
In some embodiments, a plurality of pixel units 111 are disposed in the display panel 110 in an array, and each pixel unit 111 is connected to the smear layering improving device 150 through a data line and connected to the gate driving circuit 130 through a scan line. In some embodiments, the timing control circuit 140 is configured to provide the timing control signal, the gamma voltage, and the input data (e.g., an output signal from a computer, television, mobile phone, tablet, etc.) to the source driving circuit 120, and input the timing control signal to the gate driving circuit 130.
In some embodiments, the source driving circuit 120 generates the driving voltage Vsrc1 of the previous frame of the display screen of the display panel 110 and the driving voltage Vsrc2 of the current frame of the display screen to be displayed according to the received timing control signals, gamma voltages and input data, and sends the driving voltage Vsrc1 and the driving voltage Vsrc2 to the smear layering phenomenon improvement device 150. The gate driving circuit 130 generates a Scan signal Scan according to the received timing control signal, and supplies the Scan signal Scan to each row of pixel units 111 through a Scan line. The power supply chips 160 are respectively connected to the respective pixel units 111 to supply the power supply voltage ELVDD to the respective pixel units 111.
In some embodiments, the smear layering improving apparatus 150 receives the driving voltage Vsrc1 of the previous frame of the display panel 110 and the driving voltage Vsrc2 of the current frame of the display panel to be displayed, predicts a predicted smear region of the display panel 110, where the predicted smear region is divided into a plurality of blocks in the motion direction of the moving object in the previous frame of the display panel and the current frame of the display panel to be displayed, according to the driving voltage Vsrc1 of the previous frame of the display panel and the driving voltage Vsrc2 of the current frame of the display panel to be displayed. Next, the smear layering improving apparatus 150 calculates a compensation voltage value of the driving voltage of each block of the current frame display to be displayed, compensates the driving voltage of the corresponding block according to the compensation voltage value to obtain a compensated driving voltage Vsrc of the corresponding block of the current frame display to be displayed, and provides the compensated driving voltage Vsrc of the current frame display to be displayed to the display panel 110 via the data line to control the display panel 110 to display the current frame display to be displayed.
Fig. 2 shows a circuit schematic of the pixel unit 111. Referring to fig. 2, the pixel unit 111 includes an OLED, a switching tube T1, a driving tube T2, and a storage capacitor Cs. The on and off of the switching tube T1 is controlled by the Scan signal Scan. The storage capacitor Cs is used for receiving the compensated driving voltage Vsrc of the current frame display screen to be displayed through the switching tube T1 and maintaining the gate-source voltage Vgs of the driving tube T2 at (ELVDD-Vsrc) by storing electric energy. The driving tube T2 is used to supply a driving current to the OLED according to the gate-source voltage Vgs during the off-phase of the switching tube T1. The larger the gate-source voltage Vgs, the larger the driving current received by the OLED, and the greater the luminance of the OLED. And when the compensation driving voltage Vsrc is set differently, the gate-source voltages Vgs are different, so that the gray-scale compensation of the OLEDs in the corresponding blocks of the current frame display screen to be displayed can be realized by the blocks through the setting of the compensation driving voltage Vsrc, so that the pixels in each block visually display a visual effect consistent with the target display gray scale of the corresponding pixels in the corresponding blocks of the current frame display screen to be displayed of the display panel 110 when the display panel 110 displays the current frame display screen, thereby weakening the smear layering effect generated in the predicted smear region when the display panel 110 displays the current frame display screen, and improving the display quality of the display screen.
Since the detailed process of improving the smear delamination will be described in detail below, the detailed description is omitted here.
Fig. 3 is a schematic structural view of a smear delamination improving apparatus according to an embodiment of the present disclosure. As shown in fig. 3, the smear layering phenomenon improvement apparatus 150 provided in the embodiment of the present disclosure includes a driving voltage acquisition unit 310, a smear region prediction unit 320, a compensation voltage value calculation unit 330, a driving voltage compensation unit 340, and a driving voltage output unit 350.
In some embodiments, the driving voltage obtaining unit 310 obtains the driving voltage Vsrc1 of the previous frame display screen of the display panel 110 and the driving voltage Vsrc2 of the current frame display screen to be displayed. It will be appreciated that in video or animation, there will be a number of successive still pictures (frames) played at a certain rate per second, thus forming successive dynamic pictures. The last frame display refers to the still picture at the last time point, and the current frame display refers to the still picture at the current time point. When video or animation is played, each frame of display is displayed on the display panel 110 for a period of time and then replaced by the next frame of display. The previous frame display will be cleared before the current frame display appears to make room for a new frame. Thus, by continuously refreshing the display screen, the viewer can feel a continuous dynamic effect. The pixel is the minimum unit of the display screen. In a display screen, pixels are typically arranged in a two-dimensional grid, each pixel having a particular position and gray scale value. The driving voltage of the display screen refers to a gray-scale voltage value corresponding to a gray-scale value of a pixel of the display screen when the display panel 110 displays one frame of the display screen. The gray scale refers to a gray scale of a pixel in an image or a display device. The gray level represents the luminance value of each pixel in the image, typically expressed in an integer from 0 to 255, where 0 represents black and 255 represents white.
In some embodiments, the smear region prediction unit 320 predicts a predicted smear region in which a smear phenomenon occurs when the display panel 110 displays a current frame display screen to be displayed according to the driving voltage Vsrc1 of a previous frame display screen and the driving voltage Vsrc2 of the current frame display screen to be displayed. In some embodiments, for pixels in the predicted drag region, the driving voltage Vsrc1 of the pixel of the previous frame display is less than the driving voltage Vsrc2 of the pixel of the corresponding position of the current frame display to be displayed. In some embodiments, the smear region prediction unit 320 includes a calculation module 321 and a first pixel selection module 322. The calculating module 321 may calculate a difference between the driving voltage Vsrc1 of the pixel of the previous frame display and the driving voltage Vsrc2 of the pixel of the corresponding position of the current frame display to be displayed. The first pixel selection module 322 may select a first pixel in the current frame display to be displayed, where the difference is greater than a preset threshold, and the first pixel forms a predicted smear region. It should be noted that the preset threshold may be set according to the characteristics of the display panel 110. For the pixels at the same position, the difference between the driving voltage Vsrc1 of the pixel of the previous frame of the display panel 110 and the driving voltage Vsrc2 of the pixel at the corresponding position of the current frame of the display panel to be displayed is greater than the threshold value, which indicates that the display panel 110 displays dynamic video or animation (i.e., there is a moving object with a moving position in two adjacent frames of display panels displayed by the display panel 110), when the display panel 110 switches the display panels, the previous frame of display panel may still remain on the display panel 110 before the current frame of display panel appears. Therefore, the first pixel selection module 322 predicts the predicted smear region where the smear effect may occur when the display panel 110 displays the current frame display to be displayed by selecting the first pixel in the current frame display to be displayed, where the difference is greater than the preset threshold.
In some embodiments, the compensation voltage value calculating unit 330 divides the predicted smear region of the current frame display screen to be displayed into a plurality of blocks in the motion direction of the moving object in the previous frame display screen and the current frame display screen to be displayed, and calculates the compensation voltage value of the driving voltage of each block of the current frame display screen to be displayed. In some embodiments, the compensation voltage value calculation unit 330 includes a motion direction determination module 331, a block division module 332, and a compensation voltage value calculation module 333. The motion direction determining module 331 may determine the motion direction of the moving object based on the display positions of the moving object in the previous frame display screen and the current frame display screen to be displayed in the two previous and subsequent frame display screens. Fig. 4 is a schematic diagram of a motion direction of a moving object in two adjacent frames of display pictures and a predicted smear region in a current frame of display picture to be displayed according to an embodiment of the present disclosure. As shown in fig. 4, there is a moving object 410 whose position moves in the previous frame display screen P1 and the current frame display screen P2 to be displayed. The moving direction determining module 331 determines that the moving direction of the moving object 410 is downward in the y-axis direction based on the display positions of the moving object 410 in the previous frame display screen P1 and the current frame display screen P2 to be displayed. The first pixel selection module 322 predicts a predicted smear region a where a smear may occur when the display panel 110 displays the current frame display P2 to be displayed by selecting a first pixel in the current frame display P2 to be displayed.
In some embodiments, the block segmentation module 332 divides the predicted smear region in the current frame display to be displayed into a plurality of blocks in the motion direction of the moving object in the previous frame display and the current frame display to be displayed. In some embodiments, the compensation voltage value calculating module 333 calculates compensation voltage values of driving voltages of respective blocks of the current frame display to be displayed. Fig. 5 is a diagram showing a comparison of a visual effect presented when a current frame display screen to be displayed is displayed without improving a smear layering phenomenon according to an embodiment of the present disclosure. As shown in fig. 5, in the smear region B corresponding to the predicted smear region a position in the visual effect P3 presented when the display panel 110 displays the current frame display screen P2, compared with the current frame display screen P2 to be displayed of the display panel 110, the smear layering phenomenon of gray scale layering occurs, and the further away in the moving direction of the moving object 410 (i.e., downward in the y-axis direction), the farther from the display position of the moving object 410 in the previous frame display screen P1, the darker the luminance of the smear region B. It is to be readily understood that the visual effect P3 presented when the display panel 110 displays the current frame display screen P2 without improving the smear layering phenomenon shown in fig. 5 is a visual effect caused by the smear layering effect appearing visually continuously when the display panel displays a continuous multi-frame display screen. In the direction of motion of the moving object 410 (i.e., downward in the y-axis direction), the smear region B may be divided into 6 blocks 412. The further away in the moving direction the moving object 410 is from the display position in the previous frame display P1, the darker the brightness of the block 412. Therefore, in order to improve the smear layering phenomenon occurring in the smear region B in the visual effect P3 presented when the display panel 110 displays the current frame display P2, the block dividing module 332 divides the predicted smear region a in the current frame display P2 to be displayed into 6 blocks 411 in the moving direction (i.e., downward along the y-axis direction) of the moving object 410 in the previous frame display P1 and the current frame display P2 to be displayed. The compensation voltage value calculating module 333 calculates compensation voltage values of driving voltages of respective blocks of the current frame display P2 to be displayed. It should be noted that, the dividing manner of the blocks of the predicted smear region in the current frame display frame to be displayed may be determined according to the visual effect and the implementation manner of the current frame display frame displayed by the display panel. For example, the predicted smear region may be equally divided into a fixed number of blocks according to the movement direction of the moving object. The number of divided blocks is 1 or more, and the number of pixel units included in the divided blocks is 1 or more.
In some embodiments, the gray-scale value of the pixel in the predicted drag-and-drop region of the current frame display to be displayed is greater than the gray-scale value of the pixel at the corresponding position of the previous frame display, that is, the brightness value of the pixel in the predicted drag-and-drop region of the current frame display to be displayed is increased compared to the brightness value of the pixel at the corresponding position of the previous frame display. In one example, the gray scale value of the pixel of the predicted smear region is 255, and the gray scale value of the pixel of the corresponding position of the previous frame display screen is 0. In some embodiments, the compensation voltage value calculating module 333 calculates compensation voltage values for compensating for driving voltages of pixels of corresponding blocks of each block of the predicted smear region of the current frame display to be displayed. It should be noted that, the compensation voltage value may also be calculated by using related technical means known to those skilled in the art. In some embodiments, the compensation voltage value calculation module 333 calculates, for the pixels at the same position, a difference between the driving voltage Vsrc2 of the pixel of each block of the predicted smear region of the current frame display screen to be displayed and the driving voltage Vsrc1 of the pixel at the corresponding position of the previous frame display screen, and determines an initial compensation voltage value for compensating the driving voltage of the pixel of the corresponding block based on the difference and the target display gray level of the pixel of the corresponding block. Then, the compensation voltage value calculating module 333 multiplies the initial compensation voltage value by the compensation gain corresponding to the corresponding block to obtain a compensation voltage value for compensating the driving voltage of the pixels of the corresponding block. It should be noted that, in the motion direction of the moving object in the previous frame display screen and the current frame display screen to be displayed, the further the block is from the display position of the moving object in the previous frame display screen, the larger the compensation gain corresponding to the block is. It should be noted that, the initial compensation voltage value may also be calculated by using related technical means known to those skilled in the art.
In some embodiments, the driving voltage compensation unit 340 compensates the driving voltage of the corresponding block of the predicted smear region of the current frame display to be displayed according to the compensation voltage value. In some embodiments, the driving voltage compensation unit 340 adds the compensation voltage value corresponding to each block of the predicted smear region of the current frame display to be displayed to the driving voltage of the corresponding block to obtain the compensation driving voltage Vsrc of the corresponding block. It is easy to understand that, for the pixels at the same position, the compensation driving voltage Vsrc is greater than the driving voltage Vsrc2 of the pixels of the corresponding block of the predicted smear region of the current frame display screen to be displayed. It should be noted that, in the motion direction of the moving object in the previous frame display screen and the current frame display screen to be displayed, the further the block is from the display position of the moving object in the previous frame display screen, the larger the compensation voltage value corresponding to the block is. In this way, after the smear layering phenomenon improvement method according to the embodiment of the present disclosure is processed, the block corresponding to each block position in the predicted smear region in the current frame display screen displayed by the display panel 110 visually displays a visual effect consistent with the target display gray level of the corresponding block of the predicted smear region in the current frame display screen to be displayed, and the smear layering phenomenon in the current frame display screen displayed by the display panel 110 is improved.
In some embodiments, the driving voltage output unit 350 provides the compensated driving voltage Vsrc of the current frame display screen to be displayed to the display panel 110 to control the display panel 110 to display the current frame display screen to be displayed. In some embodiments, the compensation driving voltage Vsrc of the plurality of blocks of the predicted smear region of the current frame display to be displayed is provided to the pixel unit 111 corresponding to the plurality of block positions of the predicted smear region in the display panel 110 via the data line, and the driving voltage Vsrc of the region other than the plurality of blocks of the predicted smear region of the current frame display to be displayed is provided to the pixel unit 111 corresponding to the region position other than the plurality of blocks of the predicted smear region in the display panel 110 via the data line, thereby controlling the display panel to display the current frame display to be displayed. Fig. 6 is a comparison chart of visual effects presented when a current frame display is displayed before and after improving the smear layering phenomenon according to an embodiment of the present disclosure. As shown in fig. 6, in the case where the smear layering phenomenon is not improved, there is a smear layering phenomenon in 6 blocks 412 in the smear region B corresponding to the predicted smear region a position in the visual effect P3 presented when the display panel 110 displays the current frame display screen P2. After the processing of the smear layering phenomenon improving method in the embodiment of the present disclosure, the smear layering phenomenon in the visual effect P4 presented when the display panel 110 displays the current frame display screen P2 is significantly improved.
Fig. 7 shows a flowchart of a smear layer phenomenon improvement method provided according to an embodiment of the present disclosure. As shown in fig. 7, the smear delamination phenomenon improvement method includes:
in step S710, a predicted smear region in which a smear phenomenon occurs when the display panel displays a current frame display screen to be displayed is predicted according to a driving voltage of a previous frame display screen of the display panel and a driving voltage of the current frame display screen to be displayed, wherein the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display screen and the current frame display screen to be displayed.
In step S720, a compensation voltage value of the driving voltage of the block of the current frame display to be displayed is calculated.
In step S730, the driving voltages of the corresponding blocks are compensated according to the compensation voltage values.
In step S740, the compensated driving voltage of the current frame display screen to be displayed is provided to the display panel, so as to control the display panel to display the current frame display screen to be displayed.
Since the process of improving the smear delamination phenomenon is described in detail in the above device embodiments, the description thereof is omitted here.
The embodiment of the disclosure further provides an electronic device, as shown in fig. 8, including a memory 820, a processor 810, and a program stored in the memory 820 and capable of running on the processor 810, where the program, when executed by the processor 810, can implement each process of each embodiment of the method for improving the smear layering phenomenon, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions or by controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, the embodiments of the present disclosure also provide a storage medium having stored thereon a computer program or instructions which, when executed by a processor, can implement the respective processes of the embodiments of the smear layering phenomenon improvement method described above.
The steps in the method for improving the smear layering phenomenon provided by the embodiment of the present disclosure may be executed by the instructions stored in the storage medium, so that the beneficial effects that the method for improving the smear layering phenomenon provided by the embodiment of the present disclosure may be achieved are detailed in the previous embodiments, and are not repeated herein. The specific implementation of each operation above may be referred to the previous embodiments, and will not be described herein.
In summary, according to an embodiment of the present disclosure, according to a driving voltage of a previous frame display screen of a display panel and a driving voltage of a current frame display screen to be displayed, a predicted smear region of a smear phenomenon occurs when the display panel displays the current frame display screen to be displayed is predicted, the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display screen and the current frame display screen to be displayed, then, compensation voltage values of driving voltages of respective blocks of the current frame display screen to be displayed are calculated, driving voltages of corresponding blocks are compensated according to the compensation voltage values, compensation driving voltages of corresponding blocks of the current frame display screen to be displayed are obtained, and then, the compensated driving voltage of the current frame display screen to be displayed is provided to the display panel to control the display panel to display the current frame display screen to be displayed. In this way, by setting different compensation driving voltages in the blocks of the predicted smear region, different gray-scale compensation can be performed on each block of the current frame display picture to be displayed, the pixel response time of pixels in each block when the display picture is switched is reduced, so that the pixels in each block visually display a visual effect consistent with the target display gray scale of the corresponding pixels in the corresponding block of the current frame display picture to be displayed of the display panel when the display panel displays the current frame display picture, thereby weakening the smear layering effect generated in the predicted smear region when the display panel displays the current frame display picture, and improving the display quality of the display picture.
Finally, it should be noted that: it is apparent that the above examples are merely illustrative of the present disclosure and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present disclosure.

Claims (10)

1. A smear delamination phenomenon improving method for a display panel, comprising:
predicting a predicted smear region in which a smear phenomenon occurs when the display panel displays a current frame display picture to be displayed according to a driving voltage of a previous frame display picture of the display panel and a driving voltage of the current frame display picture to be displayed, wherein the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display picture and the current frame display picture to be displayed;
calculating a compensation voltage value of the driving voltage of the block of the current frame display picture to be displayed;
compensating the driving voltage of the corresponding block according to the compensation voltage value;
and providing the compensated driving voltage of the current frame display picture to be displayed for the display panel so as to control the display panel to display the current frame display picture to be displayed.
2. The smear layering phenomenon improvement method according to claim 1, wherein the more the block is away from the display position of the moving object in the previous frame display screen in the moving direction of the moving object in the previous frame display screen and the current frame display screen to be displayed, the larger the compensation voltage value corresponding to the block is.
3. The smear layering phenomenon improvement method according to claim 1, wherein the driving voltage of the pixel of the previous frame display screen is smaller than the driving voltage of the pixel of the corresponding position of the current frame display screen to be displayed, the predicting the predicted smear region where the smear phenomenon occurs when the display panel displays the current frame display screen to be displayed according to the driving voltage of the previous frame display screen of the display panel and the driving voltage of the current frame display screen to be displayed, comprises:
calculating a difference value between the driving voltage of the pixel of the previous frame display picture and the driving voltage of the pixel at the corresponding position of the current frame display picture to be displayed;
and determining a first pixel, in the current frame display picture to be displayed, of which the difference value is larger than a preset threshold value, wherein the first pixel forms the prediction smear region.
4. The smear layering phenomenon improvement method according to claim 1, wherein the smear layering phenomenon improvement method further comprises, before the calculating of the compensation voltage value of the driving voltage of the block of the current frame display picture to be displayed:
and comparing the display positions of the moving object in the previous frame display picture and the current frame display picture to be displayed, and determining the moving direction of the moving object in the previous frame display picture and the current frame display picture to be displayed.
5. The smear layering phenomenon improvement method according to claim 1, wherein the calculating of the compensation voltage value of the driving voltage of the block of the current frame display picture to be displayed includes:
calculating a difference value between a driving voltage of the pixel of the block and a driving voltage of the pixel of the corresponding position of the previous frame display picture for the pixel of the same position;
determining an initial compensation voltage value for compensating for a driving voltage of the pixels of the block based on the difference value and a target display gray level of the pixels of the block;
multiplying the initial compensation voltage value by a compensation gain corresponding to the block to obtain a compensation voltage value for compensating the driving voltage of the pixels of the block;
in the motion direction of the moving object in the previous frame display picture and the current frame display picture to be displayed, the more the block is far from the display position of the moving object in the previous frame display picture, the larger the compensation gain corresponding to the block is.
6. The smear layering phenomenon improvement method according to claim 1, wherein the compensating the driving voltages of the corresponding blocks according to the compensation voltage values comprises:
adding the compensation voltage value corresponding to the block with the driving voltage of the block to obtain the compensation driving voltage of the block;
wherein, for the pixels at the same position, the compensation driving voltage is greater than the driving voltage of the pixels of the block.
7. A smear delamination phenomenon improving apparatus for a display panel, comprising:
a smear region prediction unit, configured to predict a predicted smear region in which a smear phenomenon occurs when the display panel displays a current frame display picture to be displayed according to a driving voltage of a previous frame display picture of the display panel and a driving voltage of the current frame display picture to be displayed, where the predicted smear region is divided into a plurality of blocks in a motion direction of a moving object in the previous frame display picture and the current frame display picture to be displayed;
a compensation voltage value calculating unit, configured to calculate a compensation voltage value of a driving voltage of the block of the current frame display screen to be displayed;
the driving voltage compensation unit is used for compensating the driving voltage of the corresponding block according to the compensation voltage value;
and the driving voltage output unit is used for providing the compensated driving voltage of the current frame display picture to be displayed for the display panel so as to control the display panel to display the current frame display picture to be displayed.
8. A display device, comprising:
a display panel provided with a plurality of pixel units arranged in an array;
a gate driving circuit for generating a scan signal according to the received timing control signal, the scan signal being supplied to each row of pixel units through a scan line;
the source electrode driving circuit is used for generating driving voltage of a previous frame of display picture of the display panel and driving voltage of a current frame of display picture to be displayed according to the received time sequence control signals, gamma voltages and input data;
the smear layering improving apparatus as set forth in claim 7, wherein the apparatus is configured to receive a driving voltage of a previous frame display frame of the display panel and a driving voltage of a current frame display frame to be displayed, compensate driving voltages of a plurality of blocks of a predicted smear region of the current frame display frame to be displayed, and send the compensated driving voltages of the current frame display frame to be displayed to each column of pixel units via a data line, so as to control the display panel to display the current frame display frame to be displayed.
9. An electronic device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to any one of claims 1 to 6.
10. A storage medium having stored thereon a computer program or instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 6.
CN202311669976.3A 2023-12-06 2023-12-06 Method, related device and storage medium for improving smear layering phenomenon Pending CN117496893A (en)

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