WO2020034294A1 - Procédé de commande d'affichage, appareil de commande d'affichage et appareil ayant une fonction de stockage - Google Patents

Procédé de commande d'affichage, appareil de commande d'affichage et appareil ayant une fonction de stockage Download PDF

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Publication number
WO2020034294A1
WO2020034294A1 PCT/CN2018/105734 CN2018105734W WO2020034294A1 WO 2020034294 A1 WO2020034294 A1 WO 2020034294A1 CN 2018105734 W CN2018105734 W CN 2018105734W WO 2020034294 A1 WO2020034294 A1 WO 2020034294A1
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WIPO (PCT)
Prior art keywords
image
displayed
change
gamma curve
range
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PCT/CN2018/105734
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English (en)
Chinese (zh)
Inventor
王利民
Original Assignee
深圳市华星光电半导体显示技术有限公司
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Publication of WO2020034294A1 publication Critical patent/WO2020034294A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the present application relates to the field of display technology, and in particular, to a display driving method, a display driving device, and a device having a storage function.
  • the color temperature adjustment method commonly used is to change the color temperature characteristics of the display by changing the gamma voltage setting.
  • the color temperature difference before and after adjustment may be obvious, and the gamma voltage modulation amplitude is too large. This results in significant changes in brightness and color between the front and back displayed images, affecting the viewing experience.
  • the interpolation of the gamma voltage can be performed based on the existing gamma voltage and the adjusted target gamma voltage, and then gradually change. Adjust the gamma voltage.
  • this method requires interpolation calculation of the gamma voltage, which easily results in excessive power consumption of the processing chip.
  • the technical problem mainly solved by the present application is to provide a display driving method, a display driving device and a device with a storage function, which can reduce unnecessary interpolation calculation of the gamma voltage and reduce the power consumption of the processing chip.
  • a technical solution adopted in the present application is to provide a display driving method including: acquiring an image to be displayed; determining whether the degree of change of the image to be displayed with respect to the previous frame display image exceeds a preset range; If the judgment result is yes, then the current gamma voltage is adjusted to the target gamma voltage to obtain the target gamma curve; the display panel is driven with the target gamma curve to display the image to be displayed.
  • the method includes:
  • a display panel is driven with the gradual gamma curve to display the image to be displayed.
  • the method further includes:
  • determining whether at least one of a color change and a brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a human eye resolution range includes:
  • the color temperature change is not within the range of the McAdam ellipse, and / or the brightness change exceeds a preset brightness range, it is determined that at least one of the color change and the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds Human eye resolution range.
  • the determining whether the color temperature change of the image to be displayed after being corrected by the target gamma curve is within the range of the McAdam ellipse includes:
  • the determining whether the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a preset brightness range includes:
  • the determining whether the degree of change of the image to be displayed with respect to the display image of the previous frame exceeds a preset range includes:
  • a display driving device including: a storage circuit, a processing circuit, and a driving circuit; a storage circuit for buffering an image to be displayed; a processing circuit connected to the storage circuit For determining whether the degree of change of the image to be displayed with respect to the previous frame display image exceeds a preset range, and when the determination result is yes, adjusting the current gamma voltage to the target gamma voltage to obtain the target gamma curve;
  • the driving circuit is connected to the processing circuit for driving the display panel with a target gamma curve to display an image to be displayed.
  • the processing circuit includes an interpolation judgment circuit and a gamma circuit connected to each other;
  • the gamma circuit is configured to obtain the mesh gamma curve corresponding to the target gamma voltage when the degree of change of the image to be displayed from the displayed image of the previous frame does not exceed a preset range;
  • the interpolation judgment circuit is configured to judge whether at least one of a color change and a brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a human eye resolution range, and when the judgment result is yes, control the A gamma circuit performs an interpolation operation on the current gamma curve and the target gamma curve to obtain a gradual gamma curve;
  • the driving circuit is further configured to drive a display panel with the gradual gamma curve to display the image to be displayed.
  • the interpolation judging circuit is specifically configured to judge whether the color temperature change of the image to be displayed after being corrected by the target gamma curve is within the range of the McAdam ellipse, and to determine whether the image to be displayed passes the Whether the brightness change after the target gamma curve correction exceeds a preset brightness range, and when the color temperature change is not within the McAdam ellipse range, and / or, when the brightness change exceeds the preset brightness range, determine the image to be displayed At least one of the color change and the brightness change after being corrected by the target gamma curve exceeds the human eye resolution range.
  • Another technical solution adopted in the present application is to provide a device with a storage function, which has a program stored therein, and the program is executed as follows:
  • a display panel is driven with the target gamma curve to display the image to be displayed.
  • the program is executed after the determining whether the degree of change of the image to be displayed with respect to the display image of the previous frame exceeds a preset range, and then executed:
  • a display panel is driven with the gradual gamma curve to display the image to be displayed.
  • the program is executed, and after determining whether at least one of a color change and a brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a human eye resolution range, is further executed:
  • the program is executed.
  • the determining whether at least one of a color change and a brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a human eye resolution range includes:
  • the color temperature change is not within the range of the McAdam ellipse, and / or the brightness change exceeds a preset brightness range, it is determined that at least one of the color change and the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds Human eye resolution range.
  • the program is executed.
  • the determining whether a color temperature change of the image to be displayed after being corrected by the target gamma curve is within a range of the McAdam ellipse includes:
  • the program is executed.
  • the determining whether a brightness change of the image to be displayed after the target gamma curve correction exceeds a preset brightness range includes:
  • the program is executed.
  • the determining whether the degree of change of the image to be displayed with respect to the previous frame displayed image exceeds a preset range includes:
  • the program is further executed:
  • the beneficial effect of the present application is that, unlike in the prior art, in some embodiments of the present application, after acquiring an image to be displayed, first determine whether the degree of change of the image to be displayed with respect to the display image of the previous frame exceeds a preset range, If the judgment result is yes, the current gamma voltage is adjusted to the target gamma voltage to obtain the target gamma curve, and the display panel is driven with the target gamma curve to display the image to be displayed, so that the image to be displayed is relative to the previous one
  • the degree of change of the frame display image exceeds a preset range
  • the gamma voltage interpolation operation is not required, and the gamma voltage is switched directly, thereby reducing unnecessary gamma voltage interpolation operations and reducing the power consumption of the processing chip.
  • FIG. 1 is a schematic flowchart of a first embodiment of a display driving method according to the present application
  • FIG. 2 is a detailed flowchart of step S12 in FIG. 1;
  • FIG. 3 is a schematic diagram of a scenario when step S12 is performed
  • FIG. 4 is a schematic flowchart of a second embodiment of a display driving method according to the present application.
  • FIG. 5 is a schematic flowchart of a third embodiment of a display driving method according to the present application.
  • FIG. 6 is a schematic structural diagram of an embodiment of a display driving device according to the present application.
  • FIG. 7 is a schematic structural diagram of an embodiment of a display device according to the present application.
  • FIG. 8 is a schematic structural diagram of an embodiment of a device with a storage function according to the present application.
  • the first embodiment of the display driving method of the present application includes:
  • the image to be displayed may be buffered in a storage medium such as a memory for subsequent processing.
  • the image to be displayed may be one frame of display data or multiple frames of display data, which is not specifically limited herein.
  • S12 Determine whether the degree of change of the image to be displayed with respect to the image displayed in the previous frame exceeds a preset range.
  • step S13 is executed.
  • the preset range is a preset display image change range that determines that the display content is a dynamic screen.
  • the preset range may be a range of the number of pixels with a pixel value change greater than a preset threshold, or a range of the number of pixels or feature points with a color change or a brightness change greater than a preset change value.
  • the degree of change may be The entire display image can also be targeted at certain areas or certain feature points, which are not specifically limited here.
  • step S12 may specifically include:
  • S121 Obtain a difference between a pixel value of each pixel point of at least a part of the image to be displayed and a pixel value of a corresponding pixel point of the same region in the previous frame of the display image.
  • the at least part of the area may be some areas of the displayed image, and the number of areas may be one or more. Of course, the at least part of the area may also be the entire display area of the displayed image, which is not specifically limited here. .
  • S122 Count the number of pixels whose difference is greater than a preset pixel threshold.
  • the preset pixel threshold is a preset minimum change of the pixel value of the pixel point relative to the pixel value of the pixel point at the corresponding position of the previous frame display image when determining that the image to be displayed is a dynamic picture.
  • the specific value may be It is determined based on actual requirements and is not specifically limited here.
  • the pixel value of each pixel in the region A of the image to be displayed and the pixels of each pixel in the same region A ′ in the previous frame display image are obtained.
  • the pixel values of the pixels at the same position can be compared to obtain the difference between the two, the difference between the pixel values of each two pixels is compared with a preset pixel threshold, and the statistical difference is greater than the preset pixel The threshold number of pixels.
  • the number of counted pixels is increased by 1, and a counter may be used. Count the number of pixels, that is, when the difference between the pixel values of two pixels is greater than a preset pixel threshold, the counter is incremented by one.
  • S123 Determine whether the counted number of pixels is greater than a preset number, or determine whether the ratio of the counted number of pixels to the total number of pixels in the at least part of the area is greater than a preset ratio.
  • the preset number is a predetermined minimum number of counted pixels required to determine that the image to be displayed is a dynamic picture
  • the preset ratio is a predetermined setting that is required to determine that the image to be displayed is a dynamic picture.
  • the minimum ratio of the counted pixel points to the total number of pixels in the at least part of the area.
  • the specific value can be set according to actual needs, and is not specifically limited here.
  • a preset number for example, 100
  • a preset ratio for example, 30%
  • the target gamma voltage is a gamma voltage obtained based on detected changes in environmental color temperature, brightness, and the like, which can cause the content displayed by the display device to be adjusted according to changes in the environment.
  • the display driving method may further include:
  • S102 Generate a target gamma voltage corresponding to the ambient color temperature and brightness.
  • the color temperature and brightness change of the environment can be detected by a device such as a camera or a sensor.
  • a device such as a camera or a sensor.
  • a corresponding target gamma voltage can be generated to drive the display panel, so that the content displayed by the display device is based on Changes in the environment.
  • steps S101 to S102 may be performed before, after or at the same time as any step before step S13, which is not specifically limited here.
  • S14 The display panel is driven with the target gamma curve to display the image to be displayed.
  • the interpolation operation directly switches the gamma voltage, thereby reducing unnecessary gamma voltage interpolation operations and reducing the power consumption of the processing chip.
  • the target image can also be passed through the target gamma. Whether the color and brightness changes after the horse curve adjustment exceed the human eye resolution range, determine whether to perform the memory operation of the gamma voltage.
  • the second embodiment of the display driving method of the present application includes:
  • S12 Determine whether the degree of change of the image to be displayed with respect to the image displayed in the previous frame exceeds a preset range.
  • step S13 is performed, otherwise step S15 is performed.
  • S14 The display panel is driven with the target gamma curve to display the image to be displayed.
  • each gamma voltage corresponds to a gamma curve
  • the driving voltage can be corrected by the gamma curve, so that changes such as brightness of a screen driven and displayed by the driving voltage change linearly when perceived by the human eye.
  • S16 Determine whether at least one of the color change and the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds the resolution range of the human eye.
  • step S17 is executed.
  • the human eye resolution range includes a color resolution range and a brightness resolution range, and the specific range can be obtained based on prior knowledge of the human eye resolution, and is not specifically limited here.
  • S17 Perform interpolation operation on the current gamma curve and the target gamma curve to obtain a gradual gamma curve.
  • the gradient gamma curve may be one or multiple, and is not specifically limited here.
  • the interpolation operation can use the existing gamma voltage interpolation operation.
  • S18 The display panel is driven with a gradient gamma curve to display an image to be displayed.
  • step S16 determines whether the determination result in step S16 is no. If the determination result in step S16 is no, then return to execute step S13.
  • a target corresponding to the target gamma voltage may be obtained in advance.
  • the color change and brightness change of the image to be displayed after the gamma curve correction and then determine whether at least one of the color change and brightness change exceeds the human eye resolution range, for example, determine whether the average color change and average brightness change of all pixels are at least at least.
  • the display panel is driven to display the image to be displayed with the corrected driving voltage.
  • the color temperature and brightness of the displayed content can be adjusted according to environmental changes, thereby improving the display effect.
  • the current gamma voltage can be directly switched to the target gamma without performing interpolation of the gamma voltage. Voltage, thereby reducing unnecessary gamma voltage interpolation operations and reducing power consumption of the processing chip.
  • the MacAdam ellipse and the human eye brightness resolution may be used for judgment.
  • the third embodiment of the display driving method of the present application is based on the second embodiment of the display driving method of the present application, and further restricting step S16 includes:
  • S161 Determine whether the color temperature change of the image to be displayed after being corrected by the target gamma curve is within the range of the McAdam ellipse.
  • the color in the McAdam's ellipse represents the range in which the human eye can't feel that the color changes too much, which is called the wide capacity of the color.
  • the target gamma curve is corrected for the image to be displayed, whether the color temperature change of each pixel point is within the range of the McAdam ellipse, or the image to be displayed is divided into multiple regions, Determine whether the average color temperature change of the pixels in each area is within the range of the McAdam ellipse, or determine whether the average color temperature change of all pixels in the image to be displayed is within the range of the McAdam ellipse.
  • S162 Determine whether the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a preset brightness range.
  • the preset brightness range is a preset range in which the human eye does not feel that the brightness changes too much. Since the human eye ’s resolution limit to brightness is affected by the difference between individual and display gray levels, its specific value can be based on actual accuracy requirements. Settings are not specifically limited here.
  • the target gamma curve correction is performed on the image to be displayed, whether the brightness change of each pixel exceeds a preset brightness range, or the image to be displayed is divided into multiple regions, is judged Whether the average brightness change of the pixels in each area exceeds the preset brightness range, or whether the average brightness change of all pixels in the image to be displayed exceeds the preset brightness range.
  • step S163 is performed.
  • S163 It is determined that at least one of a color change and a brightness change of the image to be displayed after being corrected by the target gamma curve exceeds a human eye resolution range.
  • the color temperature change is within the range of the McAdam ellipse, and the brightness change does not exceed the preset brightness range, it is determined that the color change and brightness change of the image to be displayed after being corrected by the target gamma curve do not exceed the human eye resolution range.
  • the display driving device 60 includes a storage circuit 601, a processing circuit 602, and a driving circuit 603.
  • the storage circuit 601 is configured to buffer an image to be displayed.
  • the processing circuit 602 is connected to the storage circuit 601, and is configured to determine whether the degree of change of the image to be displayed with respect to the previous frame displayed image exceeds a preset range, and when the determination result is yes, adjust the current gamma voltage to the target gamma voltage, To get the target gamma curve.
  • the driving circuit 603 is connected to the processing circuit 602 and is configured to drive the display panel with a target gamma curve to display an image to be displayed.
  • the processing circuit 602 may further include an interpolation judgment circuit 6021 and a gamma circuit 6022 connected to each other.
  • the gamma circuit 6022 is configured to obtain a target gamma curve corresponding to a target gamma voltage when a change degree of an image to be displayed from a display image of a previous frame does not exceed a preset range.
  • the interpolation judgment circuit 6021 is used to judge whether at least one of the color change and the brightness change of the image to be displayed after being corrected by the target gamma curve exceeds the human eye resolution range, and when the judgment result is yes, the control gamma circuit 6022 controls the current gamma The horse curve and the target gamma curve are interpolated to obtain a gradient gamma curve.
  • the interpolation judgment circuit 6021 is specifically configured to determine whether the color temperature change of the image to be displayed after being corrected by the target gamma curve is within the range of the McAdam ellipse, and to determine whether the brightness change of the image to be displayed after being corrected by the target gamma curve is Exceeds the preset brightness range, and determines that at least one of the color change and brightness change of the image to be displayed is corrected by the target gamma curve when the color temperature change is not within the MacAdam ellipse range, and / or, when the brightness change exceeds the preset brightness range Beyond the human eye.
  • the driving circuit 603 is further configured to drive the display panel with a gradual gamma curve to display an image to be displayed.
  • the display driving device 60 may further include an environment detection circuit 604, which is connected to the processing circuit 602 and is configured to detect the ambient color temperature and brightness, so that the processing circuit 602 Generate a corresponding target gamma voltage.
  • an environment detection circuit 604 which is connected to the processing circuit 602 and is configured to detect the ambient color temperature and brightness, so that the processing circuit 602 Generate a corresponding target gamma voltage.
  • the display driving device may further include other components, which are not specifically limited herein.
  • the display driving device after obtaining the image to be displayed, the display driving device first determines whether the degree of change of the image to be displayed with respect to the display image of the previous frame exceeds a preset range. If the determination result is yes, the current gamma voltage is adjusted to Target gamma voltage to get the target gamma curve, drive the display panel with the target gamma curve to display the image to be displayed, so when the degree of change of the image to be displayed from the previous frame display image exceeds the preset range, no need Gamma voltage interpolation is performed, and the gamma voltage is switched directly, which can reduce unnecessary gamma voltage interpolation and reduce the power consumption of the processing chip.
  • the display device 70 includes a display driving device 701 and a display panel 702 connected to each other.
  • the display driving device 701 is configured to drive the display panel 702 to display an image.
  • the type of the display panel 702 may be a liquid crystal display panel, or an OLED (Organic Light-Emitting Diode, organic light emitting diode), etc., which can be specifically selected according to actual needs, and is not specifically limited herein.
  • OLED Organic Light-Emitting Diode, organic light emitting diode
  • the display driving device of the display device obtains the image to be displayed, it is first determined whether the degree of change of the image to be displayed with respect to the display image of the previous frame exceeds a preset range. If the determination result is yes, the current gamma is changed.
  • the voltage is adjusted to the target gamma voltage to obtain the target gamma curve, and the display panel is driven with the target gamma curve to display the image to be displayed, so that when the degree of change of the image to be displayed relative to the previous frame display image exceeds a preset range It is not necessary to perform the gamma voltage interpolation operation, and the gamma voltage is switched directly, thereby reducing unnecessary gamma voltage interpolation operations and reducing the power consumption of the processing chip.
  • the device with the storage function 80 has a program 801 stored therein, and the program 801 is executed to implement the first to third tasks as the display driving method of the present application.
  • the program 801 is executed to implement the first to third tasks as the display driving method of the present application.
  • the device 80 having a storage function may be a portable storage medium such as a U disk or an optical disk, or a mobile terminal, a server, or an integrated independent component, such as a processing chip.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention concerne un procédé de commande d'affichage, un appareil de commande d'affichage et un appareil ayant une fonction de stockage, le procédé consistant : à obtenir une image à afficher (S11) ; à déterminer si un degré de changement de l'image à afficher par rapport à la trame d'image d'affichage précédente dépasse une plage prédéfinie (S12) ; si le résultat de la détermination est oui, à régler la tension gamma actuelle à une tension gamma cible pour obtenir une courbe gamma cible (S13 ) ; et à commander un panneau d'affichage avec la courbe gamma cible, afin d'afficher l'image à afficher (S14).
PCT/CN2018/105734 2018-08-16 2018-09-14 Procédé de commande d'affichage, appareil de commande d'affichage et appareil ayant une fonction de stockage WO2020034294A1 (fr)

Applications Claiming Priority (2)

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CN201810934912.4A CN109036311B (zh) 2018-08-16 2018-08-16 显示驱动方法、显示驱动装置及具有存储功能的装置
CN201810934912.4 2018-08-16

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