WO2020258845A1 - 一种显示设备及显示方法 - Google Patents

一种显示设备及显示方法 Download PDF

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Publication number
WO2020258845A1
WO2020258845A1 PCT/CN2020/071342 CN2020071342W WO2020258845A1 WO 2020258845 A1 WO2020258845 A1 WO 2020258845A1 CN 2020071342 W CN2020071342 W CN 2020071342W WO 2020258845 A1 WO2020258845 A1 WO 2020258845A1
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WIPO (PCT)
Prior art keywords
gray
scale
display area
display
grayscale
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PCT/CN2020/071342
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English (en)
French (fr)
Inventor
陈心全
张小宝
王峥
丁伟
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云谷（固安）科技有限公司
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Publication of WO2020258845A1 publication Critical patent/WO2020258845A1/zh

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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
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Definitions

  • This application relates to the field of display technology, in particular to a display device and a display method.
  • optical screen fingerprint recognition technology has attracted much attention.
  • the fingerprint recognition area of the screen needs to be turned on the highest brightness to ensure the accuracy of fingerprint recognition.
  • non-fingerprint recognition areas are prone to flickering or sudden brightness changes, which affects user experience.
  • the embodiments of the present application provide a display device and a display method to solve the problem of flickering or sudden brightness changes in non-fingerprint identification areas in the prior art.
  • a display device including: a screen body, including a first display area and a second display area; and a display drive chip electrically connected to the screen body, for driving the screen body to display and emit light.
  • the display driving chip includes: a grayscale generation module, configured to calculate the grayscale required by each pixel unit in the second display area according to externally input image data, and generate a grayscale including a first preset grayscale voltage Voltage interval; a first control module electrically connected to the grayscale generation module, configured to control the grayscale generation module to reduce the calculated grayscale required by each pixel unit in the second display area by a fixed number of steps To generate the reduced gray scale of each pixel unit in the second display area; a gray scale driving module electrically connected to the gray scale generating module is used to select the second gray scale from the gray scale voltage interval The gray-scale voltage corresponding to the reduced gray-scale of each pixel unit in the display area, and assign the gray-scale voltage to each pixel unit in the second display area; and electrically connected to the
  • the screen includes a first display area and a second display area.
  • the screen display method includes: calculating the second display area according to externally input image data.
  • the gray scale required by each pixel unit in the display area; the calculated gray scale required by each pixel unit in the second display area is reduced by a fixed number to generate a reduction for each pixel unit in the second display area Gray-scale; generating a gray-scale voltage interval including a first preset gray-scale voltage; selecting a gray-scale voltage corresponding to the reduced gray-scale of each pixel unit in the second display area from the gray-scale voltage interval ; Assign the gray-scale voltage to each pixel unit in the second display area; and assign the first preset gray-scale voltage to all pixel units in the first display area.
  • an electronic device including a processor and a memory, the memory stores a program, and when the program is executed by the processor, the processor executes the above-mentioned screen body Display method.
  • An embodiment of the present application provides a display device that controls the grayscale generation module to reduce a fixed number of grayscales required by each pixel unit in a second display area by a first control module to generate a reduced grayscale;
  • the module selects the grayscale voltage corresponding to the reduced grayscale, and assigns the grayscale voltage corresponding to the reduced grayscale to each pixel unit in the second display area; so that the display of each pixel unit in the second display area is reduced Grayscale.
  • the second control unit controls the grayscale driving module to allocate the first preset grayscale voltage to all pixel units in the first display area; so that all pixel units in the first display area display the first preset grayscale.
  • the gray scales of all the pixel units in the first display area can be individually available. Control, effectively reducing the flicker and sudden brightness changes caused by the gray scale correlation between the first display area and the second display area.
  • all the pixel units in the second display area and all the pixel units in the first display area have a gray scale difference, which can effectively reduce flicker and sudden brightness changes visually.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • FIG. 2 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • FIG. 5 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • FIG. 7 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • FIG. 8 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • FIG. 9 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • FIG. 10 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • the display device has a technical problem that the non-fingerprint recognition area is prone to flicker or sudden brightness changes during the wake-up period of the optical fingerprint.
  • the inventor found that the reasons for this problem are as follows: current display devices turn on the highest brightness in all areas of the screen to ensure the accuracy of the fingerprint recognition area, and then reduce the brightness of the non-fingerprint recognition area. Both fingerprint recognition areas show the highest brightness, and there is no difference in brightness between the two. In the process of reducing the brightness from the highest brightness, the non-fingerprint recognition area is more likely to visually flicker and sudden changes in brightness. In addition, the brightness of the fingerprint recognition area is not separately controlled, and it is impossible to give a separate brightness to the fingerprint recognition area.
  • the non-fingerprint recognition area Due to the correlation between the brightness of the non-fingerprint recognition area and the brightness of the fingerprint recognition area, the non-fingerprint recognition area appears flickering or sudden brightness changes.
  • the inventor found that due to the corresponding relationship between grayscale and brightness, the higher the grayscale, the greater the brightness.
  • the grayscale of the pixel unit can effectively avoid flickering or sudden brightness changes in the non-fingerprint recognition area.
  • there is a brightness difference between all pixel units in the non-fingerprint recognition area and the pixel units in the fingerprint recognition area which can effectively reduce flicker and sudden brightness changes visually.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • the display device includes: a screen body 1, including a first display area 11 and a second display area 12; and a display driving chip 2 electrically connected to the screen body 1, for driving the screen body 1 to display and emit light.
  • the display driving chip 2 includes: a gray-scale generation module 21 for calculating the gray-scale required by each pixel unit in the second display area 12 according to externally input image data, and generating a gray-scale voltage including a first preset gray-scale voltage Interval; the first control module 22 electrically connected to the grayscale generation module 21 is used to control the grayscale generation module 21 to reduce the calculated grayscale required by each pixel unit in the second display area 12 by a fixed number to generate the first 2.
  • the gray-scale voltage corresponding to the reduced gray-scale of, and the gray-scale voltage is allocated to each pixel unit in the second display area 12; and the second control module 23 electrically connected to the gray-scale driving module 24 controls the gray-scale driving module 24 allocates the first preset gray-scale voltage to all pixel units in the first display area 11.
  • the first control module 22 controls the gray scale generation module 21 to reduce the gray scale required by each pixel unit in the second display area 12 by a fixed number to generate a reduced gray scale; the gray scale drive module 24 selects the reduced gray scale And assign the gray-scale voltage corresponding to the reduced-level gray-scale to the pixel units in the second display area 12; so that all the pixel units in the second display area 12 display the reduced-level gray-scale.
  • the second control unit controls the grayscale driving module 24 to allocate the first preset grayscale voltage to all pixel units in the first display area 11; so that all the pixel units in the first display area 11 display the first preset grayscale.
  • the gray levels of all the pixel units in the first display area 11 are individually controllable, effectively reducing the flicker and sudden brightness changes caused by the gray level correlation between the first display area 11 and the second display area 12.
  • all the pixel units in the second display area 12 and all the pixel units in the first display area 11 have a gray scale difference, which can effectively reduce flicker and sudden brightness changes visually.
  • the screen body 11 can be a display screen such as an organic light emitting diode (OLED), as long as it can provide a screen for displaying images, and the application does not limit the specific display form of the screen.
  • the first control module 22 may be an independent circuit structure inside the display chip, or may be a micro-integrated circuit module inside the display chip. The embodiment of the present application does not limit the specific implementation form of the first control module 22.
  • the second control module 23 is similar to the first control module 22 and will not be repeated here.
  • the voltage value of the first preset gray-scale voltage may be the minimum value among the voltage values of the gray-scale voltage interval; the voltage value of the first preset gray-scale voltage may be the maximum value among the voltage values of the gray-scale voltage interval.
  • the first display area 11 may be a fingerprint recognition area 11', or may be an under-screen camera display area. Since the voltage value of the gray scale voltage is smaller, the gray scale is higher, and the brightness is brighter. When the first display area 11 is the fingerprint recognition area 11', the voltage value of the first preset gray-scale voltage may be the minimum value among the voltage values of the gray-scale voltage interval, so that the gray-scale of the first display area 11 is at the highest gray-scale , To ensure the accuracy of fingerprint area recognition.
  • the voltage value of the first preset gray-scale voltage may be the maximum value among the voltage values of the gray-scale voltage interval, so that the gray-scale of the first display area 11 is at the lowest gray-scale , Ensure that the brightness of the camera under the screen is low, and avoid high brightness from affecting the shooting effect.
  • the above are only two specific application scenarios of the embodiments of the present application, but are not limited to the foregoing application scenarios.
  • the embodiment of the present application does not specifically limit the first preset gray-scale voltage.
  • the reduced gray scale is the gray scale required by each pixel unit in the second display area 12 reduced by a fixed number to generate the reduced gray scale of each pixel unit in the second display area 12.
  • the fixed order can be the first order, the second order, the fifth order, the tenth order, the twentieth order, etc., as long as the calculated gray scale required by each pixel unit in the second display area 12 is reduced by the fixed order to generate the second display
  • the gray scale of each pixel unit in the area 12 may be reduced, and the specific order of the fixed order is not limited according to the embodiment of the invention.
  • the second control module 23 is integrated with the first control module 22.
  • the first control module 22 and the second control module 23 both control execution actions when the screen is in a state to be recognized. Integrating the second control module 23 into the first control module 22 can save space, wiring, and material.
  • FIG. 2 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the first display area 11 includes a fingerprint recognition area 11';
  • the second display area 12 includes a non-fingerprint recognition area 12'.
  • the voltage value of the first preset gray-scale voltage is the minimum value among the voltage values of the gray-scale voltage interval.
  • the first control module 22 controls the grayscale generation module 21 to reduce the grayscale required by each pixel unit in the non-fingerprint recognition area 12' by a fixed number of grayscales to generate a reduced grayscale; the grayscale drive module 24 selects the reduced grayscale The gray scale voltage corresponding to the gray scale, and the gray scale voltage corresponding to the reduced gray scale is assigned to the pixel unit in the non-fingerprint recognition area 12'; so that each pixel unit in the non-fingerprint recognition area 12' displays the reduced gray scale .
  • the second control unit controls the grayscale driving module 24 to allocate the first preset grayscale voltage to all pixel units in the fingerprint recognition area 11'; so that all pixel units in the fingerprint recognition area 11' display the first preset grayscale.
  • the voltage value of the first preset gray-scale voltage is the minimum value among the voltage values of the gray-scale voltage interval
  • all the pixel units in the fingerprint recognition area 11' display the highest gray level, and the fingerprint recognition area 11' is at the highest brightness, which is effective Improve the accuracy of fingerprint recognition.
  • the gray levels of all pixel units in the fingerprint recognition area 11' are individually controllable, which effectively reduces the flicker and brightness mutation caused by the gray level correlation between the fingerprint recognition area 11' and the non-fingerprint recognition area 12'.
  • all the pixel units in the non-fingerprint recognition area 12' and the pixel units in the fingerprint recognition area 11' have a gray scale difference, which can effectively reduce flicker and sudden brightness changes visually.
  • the fixed gray level is one level.
  • the first control module 22 controls the grayscale generation module 21 to reduce the grayscale required by each pixel unit in the non-fingerprint recognition area 12' by one level to generate a reduced grayscale.
  • the fixed order is the first order, it will not affect the display effect of the non-fingerprint recognition area 12', and may have a gray level difference with the pixel unit in the fingerprint recognition area 11', effectively reducing flicker and sudden brightness changes visually.
  • the gray-scale voltage range is from zero gray-scale voltage to the fifteenth gray-scale voltage, and the first preset gray-scale voltage can be the fifteenth level Grayscale voltage;
  • the screen 1 is an 8bit image display screen 1, also known as an 8bit screen, the grayscale voltage range is from zero grayscale voltage to 255th grayscale voltage, the first preset grayscale The voltage can be the 255th gray-scale voltage;
  • the screen 1 is a 10-bit image display screen 1, also called a 10-bit screen, the gray-scale voltage range is from zero gray-scale voltage to one thousand and twenty Three-gray-scale voltage;
  • the first preset gray-scale voltage can be the thousandth and twenty-third gray-scale voltage; the voltage value of the first preset gray-scale voltage only needs to be the minimum value among the voltage values of the gray-scale voltage interval
  • the embodiment of the present application does not limit the specific order of the first preset gray-scale voltage.
  • the gray-scale voltage interval includes a zero gray-scale voltage to a two-hundred-fifth gray-scale voltage; the first preset gray-scale voltage includes a two-hundred-fifth gray-scale voltage.
  • the gray-scale generation module 21 calculates the gray-scale required by each pixel unit in the non-fingerprint recognition area 12' according to the image data, and generates the zero-gray-scale voltage to the 255th gray-scale voltage.
  • the first control module 22 controls and controls the grayscale generation module 21 to reduce the grayscale required by each pixel unit in the non-fingerprint recognition area 12' by a fixed number of steps to generate a reduced grayscale for each pixel unit in the non-fingerprint recognition area 12' Level; the gray level voltage corresponding to the reduced level of each pixel in the non-fingerprint recognition area 12' is selected from the zero gray level voltage to the 255th gray level voltage through the gray level driving module 24, and the gray level voltage will be reduced The gray-scale voltage corresponding to the gray scale is allocated to the pixel unit in the non-fingerprint recognition area 12'; so that each pixel unit in the non-fingerprint recognition area 12' displays the reduced gray scale.
  • the second control unit controls the gray-scale driving module 24 to allocate 255-level gray-scale voltages to all pixel units in the fingerprint recognition area 11'; making all the pixel units in the fingerprint recognition area 11' display 255 levels Grayscale.
  • the gray levels of all pixel units in the fingerprint recognition area 11 ′ are individually controllable, which effectively reduces flicker and sudden brightness changes caused by the gray level correlation between the first display area 11 and the second display area 12. Since the fingerprint recognition area 11' displays the 255 gray scale, the fingerprint recognition area 11' can only display the zero gray scale to the 254 gray scale according to the image data. All the pixel units in the non-fingerprint recognition area 12' and the pixel units in the fingerprint recognition area 11' have a gray scale difference, which can also effectively reduce flicker and sudden brightness changes visually.
  • FIG. 3 is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the display device further includes: a sensor 3 electrically connected to the first control module 22 and the second control module 23, and is used to send an identification start signal to the A control module 22 and a second control module 23.
  • the first control module 22 is further configured to control the grayscale generation module 21 to reduce the calculated grayscale required by each pixel unit in the second display area 12 by a fixed number of steps to generate the second display area when the recognition start signal is received.
  • the reduced gray level of each pixel unit in 12; the second control module 23 is further configured to control the gray level driving module 24 to allocate the first preset gray level to all the first display areas 11 when the recognition start signal is received.
  • Pixel unit is a schematic structural diagram of a display device provided by an embodiment of the application.
  • the display device further includes: a sensor 3 electrically connected to the first control module 22 and the second control module 23, and is used to send an identification start signal to the A control module 22 and a second control module 23
  • the sensor 3 When the sensor 3 senses that the screen 1 is in the fingerprint recognition state, it sends a recognition start signal to the first control module 22 and the second control module 23.
  • the first control module 22 receives the recognition start signal and controls the grayscale generation module 21 to generate
  • the second control module 23 receives the recognition start signal, and controls the gray level driving module 24 to assign the first preset gray level to the fingerprint recognition area 11'.
  • the fingerprint recognition area 11' can be individually controlled.
  • the sensor 3 is electrically connected to the integrated module.
  • the sensor 33 may be a piezoelectric sensor 3, a photosensitive sensor 3, or an infrared sensor 3.
  • the embodiment of the present application does not limit the specific form of the sensor 3.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • the display driver chip 2 further includes: a first register module 25 electrically connected to the second control module 23, and is used to provide a register of the fingerprint recognition area 11' when the second control module 23 receives the recognition start signal
  • the information is given to all pixel units in the fingerprint recognition area 11'.
  • Registered information refers to the pre-stored information of the fingerprint recognition area 11' such as the image shape, image position and image color of the fingerprint recognition area 11' in the fingerprint recognition mode.
  • the first registration module 25 provides the registration information of the fingerprint identification area 11' to all the pixel units in the fingerprint identification area 11', so that the fingerprint identification area 11' appears on the screen 1. Optical image.
  • the first registration module 25 is integrated in the second control module 23.
  • the first registration module 25 is integrated in the second control module 23.
  • the second control module 23 receives the recognition start signal
  • the first registration module 25 provides the registration information of the fingerprint recognition area 11' to all pixels in the fingerprint recognition area 11' Unit to make the screen 1 present the optical image of the fingerprint recognition area 11';
  • the second control module controls the grayscale drive module 24 to allocate a two hundred and fifty-fifth grayscale voltage to all pixel units in the fingerprint recognition area 11' to ensure The fingerprint recognition is accurate, and the non-fingerprint recognition area 12' does not have a splash screen or sudden brightness changes.
  • the second control module 23 is integrated with the first control module 22 to form a third control block
  • the first register module 25 may also be integrated with the third control module. Integrating the first control module 22, the second control module 23, and the first register module 25 into one can effectively save space.
  • FIG. 5 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • the grayscale generation module 21 includes: a grayscale calculation unit 211, configured to calculate the grayscale required by each pixel unit in the second display area 12 according to image data; and the grayscale calculation unit 211 electrically connected
  • the gamma unit 212 is used to generate gray-scale voltage intervals.
  • the pixel units in the non-fingerprint recognition area 12' need different gray scales to realize the display of different brightness of the image.
  • the gray scale calculation unit 211 calculates the gray scale required by each pixel in the non-fingerprint recognition area 12' according to the received image data. .
  • the gamma unit 212 calculates the corresponding gray-scale voltage of each gray-scale between the highest voltage value and the lowest voltage value by using the corresponding relationship between the gray-scale and the gray-scale voltage according to the required total gray-scale number.
  • Both the gray-scale calculation unit 211 and the gamma unit 212 may be independent circuit structures inside the display chip, or both may be micro-integrated circuit units inside the display chip.
  • the embodiment of the present application has an effect on the gray-scale calculation unit 211 and the gamma unit 212.
  • the circuit structure is not specifically limited.
  • FIG. 6 is a schematic structural diagram of a display device provided by an embodiment of this application.
  • the gray-scale driving module 24 includes: a source driving unit 241 for calculating a digital instruction and sending the digital instruction to the digital-to-analog conversion unit 242, and the digital instruction is used to execute the second selection from the gray-scale voltage interval.
  • the gray scale voltage corresponding to the reduced gray scale of the pixel unit, and the gray scale voltage is allocated to each pixel unit in the second display area 12.
  • the gray scale driving module 24 needs to select the gray scale voltage corresponding to the reduced gray scale of each pixel unit in the second display area 12 from the gray scale voltage interval, and allocate the gray scale voltage to each of the second display areas 12 Pixel unit.
  • the source driving unit 241 calculates the digital instruction for performing the selection operation and sends the digital instruction to the digital-to-analog conversion unit 242.
  • the digital-to-analog conversion unit 241 converts the digital instruction to select each of the second display areas 12 from the gray-scale voltage interval.
  • the gray scale voltage corresponding to the reduced gray scale of each pixel unit, and the gray scale voltage is assigned to each pixel unit in the second display area 12.
  • FIG. 7 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • the screen body includes: a first display area and a second display area.
  • the display method includes the following steps:
  • Step 701 Calculate the gray level required by each pixel unit in the second display area according to externally input image data
  • Step 702 Reduce the calculated gray scale required by each pixel unit in the second display area by a fixed number of steps to generate a reduced gray scale for each pixel unit in the second display area;
  • Step 703 Generate a gray-scale voltage interval including the first preset gray-scale voltage
  • Step 704 Select the grayscale voltage corresponding to the reduced grayscale of each pixel unit in the second display area from the grayscale voltage interval; assign the grayscale voltage to each pixel unit in the second display area;
  • Step 705 Allocate the first preset gray-scale voltage to all pixel units in the first display area.
  • Control effectively reducing the flicker and sudden brightness changes caused by the gray scale correlation between the first display area and the second display area.
  • all the pixel units in the second display area have a gray scale difference with the pixel units in the first display area, which can effectively reduce flicker and sudden brightness changes visually.
  • step 703 is before step 704 and step 705; step 701 is before step 702; and step 702 is before step 704, the order of step 701, step 702, step 703, step 704, and step 705 is not required in this embodiment. Make specific restrictions.
  • the voltage value of the first preset gray-scale voltage may be the minimum value among the voltage values of the gray-scale voltage interval; the voltage value of the first preset gray-scale voltage may be the maximum value among the voltage values of the gray-scale voltage interval.
  • the first display area may be a fingerprint recognition area or an under-screen camera display area. Since the voltage value of the gray scale voltage is smaller, the gray scale is higher, and the brightness is brighter. When the first display area is a fingerprint recognition area, the voltage value of the first preset gray-scale voltage may be the minimum value among the voltage values of the gray-scale voltage interval, so that the gray-scale of the first display area is at the highest gray-scale, ensuring the fingerprint area Accuracy of recognition.
  • the voltage value of the first preset gray-scale voltage may be the maximum value of the voltage values in the gray-scale voltage interval, so that the gray-scale of the first display area is at the lowest gray-scale, ensuring The brightness of the camera under the screen is low to avoid high brightness from affecting the shooting effect.
  • the first display area includes a fingerprint recognition area; the second display area includes a non-fingerprint recognition area.
  • the voltage value of the first preset gray-scale voltage is the minimum value among the voltage values of the gray-scale voltage interval.
  • each pixel unit in the non-fingerprint recognition area By reducing the number of gray levels required by each pixel unit in the non-fingerprint recognition area by a fixed number of gray levels to generate a reduced gray level; by selecting the gray level voltage corresponding to the reduced gray level, and setting the gray level corresponding to the reduced gray level The voltage is allocated to each pixel unit in the non-fingerprint recognition area; making each pixel unit in the non-fingerprint recognition area display a reduced gray scale.
  • all the pixel units in the fingerprint recognition area display the first preset gray-scale.
  • the voltage value of the first preset gray-scale voltage is the minimum value among the voltage values of the gray-scale voltage interval
  • all the pixel units in the fingerprint recognition area display the highest gray level, and the fingerprint recognition area is at the highest brightness, which effectively improves the fingerprint recognition performance accuracy.
  • the gray levels of all pixel units in the fingerprint recognition area are individually controllable, which effectively reduces flicker and sudden brightness changes caused by the gray level correlation between the first display area and the second display area.
  • all the pixel units in the fingerprint recognition area of the non-fingerprint recognition area and the pixel units in the fingerprint recognition area have a gray scale difference, which can also effectively reduce flicker and sudden brightness changes visually.
  • the fixed order is the first order.
  • the fixed order is the first order, it will not affect the display effect of the non-fingerprint recognition area, and there may be a gray scale difference with the pixel unit in the fingerprint recognition area, which can effectively reduce flicker and brightness mutation visually.
  • the gray-scale voltage interval includes zero gray-scale voltage to a two-hundred-fifth gray-scale voltage; the first preset gray-scale voltage includes a two-hundred-fifth gray-scale voltage.
  • the corresponding zero grayscale voltage to 255 grayscale voltage is also common.
  • the gray levels of all pixel units in the fingerprint recognition area are individually controllable, which effectively reduces flicker and sudden brightness changes caused by the gray level correlation between the first display area and the second display area. Since the fingerprint recognition area displays the 255 gray scale, the fingerprint recognition area can only display the zero gray scale to the 254 gray scale according to the image data. All the pixel units in the non-fingerprint recognition area and the pixel units in the fingerprint recognition area have a gray scale difference, which can effectively reduce flicker and sudden brightness changes visually.
  • FIG. 8 is a schematic flowchart of a screen display method provided by an embodiment of the application.
  • step 705 assign a first preset gray-scale voltage to all pixel units in the first display area
  • step 702 before the calculated gray level required by each pixel unit in the second display area is reduced by a fixed number to generate a reduced gray level for each pixel unit in the second display area
  • the display method further includes: steps 706: Receive a recognition start signal; the recognition start signal is used to indicate that the display device needs to start the fingerprint recognition area for fingerprint recognition.
  • the recognition start signal is used to indicate that the display device needs to start the fingerprint recognition area for fingerprint recognition. After receiving the recognition start signal, assign a two hundred and fifty-fifth gray-scale voltage to all pixel units in the fingerprint recognition area, so that the gray-scale of the fingerprint recognition area can be individually controlled.
  • Fig. 9 is a schematic flowchart of a screen display method provided by an embodiment of the application. As shown in Fig. 9, after step 706: receiving a recognition start signal, the display method further includes: step 707: providing a fingerprint recognition area The registration information is given to all pixel units in the fingerprint recognition area.
  • Registered information refers to the pre-stored information of the fingerprint recognition area such as the image shape, image position, and image color of the fingerprint recognition area in the fingerprint recognition mode. After receiving the recognition start signal, the registration information of the fingerprint recognition area is provided to all the pixel units in the fingerprint recognition area, so that the optical image of the fingerprint recognition area is presented on the screen.
  • step 707 is after step 706, the embodiment of the present application does not specifically limit the execution order of step 707, step 701, and step 703.
  • FIG. 10 is a schematic flowchart of a screen display method provided by an embodiment of the application. As shown in FIG. 10, step 704: select the drop of each pixel unit in the second display area from the gray-scale voltage interval
  • the gray-scale voltage corresponding to the gray-scale includes:
  • Step 7041 Calculate a digital command and send the digital command to the digital-to-analog conversion unit.
  • the digital command is used to select the gray-scale voltage corresponding to the reduced gray-scale of each pixel unit in the second display area from the gray-scale voltage interval; as well as
  • Step 7042 Convert the digital command, so as to select the gray-scale voltage corresponding to the reduced gray-scale of each pixel unit in the second display area from the gray-scale voltage interval, and assign the gray-scale voltage to each of the second display areas. Pixel unit.
  • the digital instructions are first calculated. After digital-to-analog conversion, the gray-scale voltage corresponding to the reduced gray-scale of each pixel unit in the second display area is selected from the gray-scale voltage interval, and The gray scale voltage corresponding to the reduced gray scale is allocated to each pixel unit in the second display area.
  • the present application also provides an electronic device, including a processor and a memory, the memory stores a program, and when the program is executed by the processor, the processor causes the processor to execute the above-mentioned screen display method.
  • the above are only the preferred embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application within.

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Abstract

一种显示设备，包括：屏体，包括第一显示区域与第二显示区域；以及显示驱动芯片，与所述屏体电连接用于驱动所述屏体显示发光；其中，所述显示驱动芯片包括：灰阶生成模块、第一控制模块、灰阶驱动模块以及第二控制模块。通过第一控制模块控制灰阶生成模块对第二显示区域中的每个像素单元需要的灰阶减少固定阶数以生成降阶灰阶；通过灰阶驱动模块选出降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域的每个像素单元；通过第二控制单元控制灰阶驱动模块分配第一预设灰阶电压给第一显示区域中的所有像素单元；使得第二显示区域与第一显示区域有灰阶差，使得第一显示区域单独可控，有效第二显示区域的减少闪烁以及亮度突变。

Description

一种显示设备及显示方法 技术领域
本申请涉及显示技术领域，具体涉及一种显示设备及显示方法。
发明背景
随着显示技术的不断发展，光学式屏幕指纹识别技术备受关注。显示设备中，在光学指纹唤醒期间，屏幕的指纹识别区域需要开启最高亮度以保证指纹识别的准确性。但非指纹识别区域的容易出现闪烁或者亮度突变的现象，从而影响用户体验。
发明内容
有鉴于此，本申请实施例提供了一种显示设备及显示方法，以解决现有技术中非指纹识别区域闪烁或亮度突变的问题。
本申请一方面提供了一种显示设备，包括：屏体，包括第一显示区域与第二显示区域；以及与所述屏体电连接的显示驱动芯片，用于驱动所述屏体显示发光。所述显示驱动芯片包括：灰阶生成模块，用于根据外部输入的图像数据计算所述第二显示区域中每个像素单元需要的灰阶，并生成包括第一预设灰阶电压的灰阶电压区间；与所述灰阶生成模块电连接的第一控制模块，用于控制所述灰阶生成模块将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶；与所述灰阶生成模块电连接的灰阶驱动模块，用于从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将所述灰阶电压分配给所述第二显示区域中每个像素单元；以及与所述灰阶驱动模块电连接的第二控制模块，控制所述灰阶驱动模块分配所述第一预设灰阶电压给所述第一显示区域中的所有像素单元。
本申请的另一方面提供了一种屏体显示方法，所述屏体包括：第一显示区 域与第二显示区域，所述屏体显示方法包括：根据外部输入的图像数据计算所述第二显示区域中每个像素单元需要的灰阶；将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶；生成包括第一预设灰阶电压的灰阶电压区间；从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；将所述灰阶电压分配给所述第二显示区域中每个像素单元；以及分配所述第一预设灰阶电压给所述第一显示区域中的所有像素单元。
本申请的又一方面，提供了一种电子设备，包括处理器和存储器，所述存储器存有程序，所述程序被所述处理器执行时，使得所述处理器执行如上所述的屏体显示方法。
本申请实施例提供一种显示设备，通过第一控制模块控制灰阶生成模块对第二显示区域中的每个像素单元需要的灰阶减少固定阶数以生成降阶灰阶；通过灰阶驱动模块选出降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给第二显示区域的每个像素单元；使得第二显示区域中的每个像素单元的显示降阶灰阶。通过第二控制单元控制灰阶驱动模块分配第一预设灰阶电压给第一显示区域中的所有像素单元；使得第一显示区域中的所有像素单元显示第一预设灰阶。由于第一显示区域中的所有像素单元显示第一预设灰阶以及第二显示区域中的每个像素单元显示降阶灰阶，从而使得第一显示区域中的所有像素单元的灰阶单独可控，有效减少第一显示区域与第二显示区域的灰阶关联引起的闪烁和亮度突变。此外，第二显示区域中的所有像素单元与第一显示区域的所有像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
附图简要说明
图1所示为本申请一实施例提供的一种显示设备的结构示意图。
图2所示为本申请一实施例提供的一种显示设备的结构示意图。
图3所示为本申请一实施例提供的一种显示设备的结构示意图。
图4所示为本申请一实施例提供的一种显示设备的结构示意图。
图5所示为本申请一实施例提供的一种显示设备的结构示意图。
图6所示为本申请一实施例提供的一种显示设备的结构示意图。
图7所示为本申请一实施例提供的屏体显示方法的示意性流程图。
图8所示为本申请一实施例提供的屏体显示方法的示意性流程图。
图9所示为本申请一实施例提供的屏体显示方法的示意性流程图。
图10所示为本申请一实施例提供的屏体显示方法的示意性流程图。
实施本申请的方式
正如背景技术所述，显示设备存在光学指纹唤醒期间非指纹识别区域容易出现闪烁或者亮度突变的技术问题。发明人研究发现，出现这种问题的原因如下：目前的显示设备将屏幕所有区域都开启最高亮度以保证指纹识别区域的准确性，然后将非指纹识别区域的亮度降低，由于指纹识别区域与非指纹识别区域都显示最高亮度，两者之间没有亮度差别，非指纹识别区域在从最高亮度降低亮度的过程中，视觉上更容易出现闪烁以及亮度突变。此外，没有单独控制指纹识别区域的亮度，无法给指纹识别区域一个单独的亮度，由于非指纹识别区域的亮度与指纹识别区域的亮度存在关联性，非指纹识别区域出现闪烁或者亮度突变的现象。为了解决上述问题，发明人研究发现，由于灰阶与亮度存在对应关系，灰阶越高亮度越大，通过独立控制指纹识别区域中的所有像素单元的灰阶，减少与非指纹识别区域中所有像素单元的灰阶的关联性，可以有效避免非指纹识别区域的闪烁或亮度突变。此外，非指纹识别区域中的所有像素单元与指纹识别区域的像素单元存在亮度差，从视觉上也可有效减少闪烁以及亮度突变。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1所示为本申请一实施例提供的一种显示设备的结构示意图。如图1所示，显示设备，包括：屏体1，包括第一显示区域11与第二显示区域12；以及与 屏体1电连接的显示驱动芯片2，用于驱动屏体1显示发光。显示驱动芯片2包括：灰阶生成模块21，用于根据外部输入的图像数据计算第二显示区域12中每个像素单元需要的灰阶，并生成包括第一预设灰阶电压的灰阶电压区间；与灰阶生成模块21电连接的第一控制模块22，用于控制灰阶生成模块21将计算出的第二显示区域12中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域12中每个像素单元的降阶灰阶；与灰阶生成模块21电连接的灰阶驱动模块24，用于从灰阶电压区间中选出第二显示区域12中每个像素单元的降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域12中每个像素单元；以及与灰阶驱动模块24电连接的第二控制模块23，控制灰阶驱动模块24分配第一预设灰阶电压给第一显示区域11中的所有像素单元。
通过第一控制模块22控制灰阶生成模块21对第二显示区域12中的每个像素单元需要的灰阶减少固定阶数以生成降阶灰阶；通过灰阶驱动模块24选出降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给第二显示区域12的像素单元；使得第二显示区域12中的所有的像素单元显示降阶灰阶。通过第二控制单元控制灰阶驱动模块24分配第一预设灰阶电压给第一显示区域11中的所有像素单元；使得第一显示区域11中的所有像素单元显示第一预设灰阶。由于第一显示区域11中的所有像素单元显示第一预设灰阶以及第二显示区域12中的每个像素单元显示降阶灰阶，从而使得第一显示区域11中的所有像素单元的灰阶单独可控，有效减少第一显示区域11与第二显示区域12的灰阶关联引起的闪烁和亮度突变。此外，第二显示区域12中的所有像素单元与第一显示区域11中的所有像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
屏体11可以有机发光二极管(OLED)等显示屏幕，只要可以提供显示图像的屏幕即可，本申请对屏幕的具体显像形式不做限定。第一控制模块22可以是显示芯片内部独立的电路结构，也可以是显示芯片内部微型集成的电路模块，本申请实施例对第一控制模块22的具体实现形式不做限定。第二控制模块23与第一控制模块22类似，在此不再赘述。
第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最小值；第 一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最大值。第一显示区域11可以是指纹识别区域11′，也可以是屏下摄像头显示区域。由于灰阶电压的电压值越小，灰阶越高，亮度越亮。当第一显示区域11是指纹识别区域11′，第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最小值，从而第一显示区域11的灰阶处于最高灰阶，确保指纹区域识别的准确性。当第一显示区域11是屏下摄像头显示区域，第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最大值，从而第一显示区域11的灰阶处于最低灰阶，保证屏下摄像头亮度低，避免高亮度影响拍摄效果。以上只是本申请实施例的两个具体应用场景，但并不限于上述应用场景。本申请实施例对第一预设灰阶电压不做具体限定。
降阶灰阶为第二显示区域12中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域12中每个像素单元的降阶灰阶。固定阶数可以是一阶、两阶、五阶、十阶以及二十阶等，只要将计算出的第二显示区域12中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域12中每个像素单元的降阶灰阶即可，分发明实施例对固定阶数的具体阶数不做限定。
可选地，第二控制模块23集成于第一控制模块22。第一控制模块22与第二控制模块23都是当屏幕处于待识别状态控制执行动作，将第二控制模块23集成于第一控制模块22可以节省空间，节省布线，节省材料。
图2所示为本申请一实施例提供的一种显示设备的结构示意图。如图2所示，第一显示区域11包括指纹识别区域11′；第二显示区域12包括非指纹识别区域12′。第一预设灰阶电压的电压值为灰阶电压区间的电压值中的最小值。
通过第一控制模块22控制灰阶生成模块21对非指纹识别区域12′中的每个像素单元需要的灰阶减少固定阶数以生成降阶灰阶；通过灰阶驱动模块24选出降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给非指纹识别区域12′中的像素单元；使得非指纹识别区域12′中的每个像素单元显示降阶灰阶。通过第二控制单元控制灰阶驱动模块24分配第一预设灰阶电压给指纹识别区域11′中的所有像素单元；使得指纹识别区域11′的所有像素单元显示第一 预设灰阶。由于第一预设灰阶电压的电压值为灰阶电压区间的电压值中的最小值，使得指纹识别区域11′中的所有像素单元显示最高灰阶，指纹识别区域11′处于最高亮度，有效提高指纹识别的准确性。同时，指纹识别区域11′中的所有像素单元的灰阶单独可控，有效减少指纹识别区域11′与非指纹识别区域12′的灰阶关联引起的闪烁和亮度突变。此外，非指纹识别区域12′中的所有像素单元与指纹识别区域11′中的像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
可选地，固定灰阶为一阶。第一控制模块22控制灰阶生成模块21对非指纹识别区域12′中的每个像素单元需要的灰阶减少一阶以生成降阶灰阶。固定阶数为一阶时，既不影响非指纹识别区域12′的显示效果，又可以与指纹识别区域11′中像素单元存在灰阶差，从视觉上有效减少闪烁以及亮度突变。
如果屏体1是4bit图像显示屏体1，也称为4bit屏体，则灰阶电压区间为零灰阶电压至第十五灰阶电压，第一预设灰阶电压可以是第十五阶灰阶电压；如果屏体1是8bit图像显示屏体1，也称为8bit屏体，则灰阶电压区间为零灰阶电压至第二百五十五灰阶电压，第一预设灰阶电压可以是第两百五十五阶灰阶电压；如果屏体1是10bit图像显示屏体1，也称为10bit屏体，则灰阶电压区间为零灰阶电压至第一千零二十三灰阶电压；第一预设灰阶电压可以是第一千零二十三灰阶电压；第一预设灰阶电压的电压值只要是灰阶电压区间的电压值中的最小值即可，本申请实施例对第一预设灰阶电压的具体阶数不做限定。
可选地，灰阶电压区间包括零灰阶电压至第二百五十五灰阶电压；第一预设灰阶电压包括第二百五十五灰阶电压。
由于8bit屏体1是目前最常见且显示效果清晰的屏体1，对应的零灰阶电压至第二百五十五灰阶电压也是常见的。灰阶生成模块21根据图像数据计算非指纹识别区域12′中每个像素单元需要的灰阶，并生成零灰阶电压至第二百五十五灰阶电压。第一控制模块22控制控制灰阶生成模块21对非指纹识别区域12′中的每个像素单元需要的灰阶减少固定阶数以生成非指纹识别区域12′中每个像素单元的降阶灰阶；通过灰阶驱动模块24从零灰阶电压至第二百五十五灰阶 电压选出非指纹识别区域12′中的每个像素的降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给非指纹识别区域12′中的像素单元；使得非指纹识别区域12′中的每个像素单元显示降阶灰阶。通过第二控制单元控制灰阶驱动模块24分配二百五十五阶灰阶电压给指纹识别区域11′中的所有像素单元；使得指纹识别区域11′的所有像素单元显示二百五十五阶灰阶。指纹识别区域11′中的所有像素单元的灰阶单独可控，有效减少第一显示区域11与第二显示区域12的灰阶关联引起的闪烁和亮度突变。由于指纹识别区域11′显示第二百五十五灰阶，而指纹识别区域11′只能根据图像数据显示零灰阶至第二百五十四灰阶。非指纹识别区域12′中的所有像素单元与指纹识别区域11′中的像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
图3所示为本申请一实施例提供的一种显示设备的结构示意图。如图3所示，显示设备还包括：与第一控制模块22和第二控制模块23电连接的传感器3，用于当感应到屏体1处于待指纹识别状态时，发送识别启动信号给第一控制模块22与第二控制模块23。第一控制模块22进一步配置为，当接收到识别启动信号，控制灰阶生成模块21将计算出的第二显示区域12中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域12中每个像素单元的降阶灰阶；第二控制模块23进一步配置为，当接收到识别启动信号，控制灰阶驱动模块24分配第一预设灰阶给第一显示区域11中的所有像素单元。
传感器3感应到屏体1处于待指纹识别状态时，发送识别启动信号给第一控制模块22和第二控制模块23，第一控制模块22接收到识别启动信号，控制灰阶生成模块21生成降阶灰阶；第二控制模块23接收到识别启动信号，控制灰阶驱动模块24分配第一预设灰阶给指纹识别区域11′。实现指纹识别区域11′的单独可控。
，当第二控制模块23集成于第一控制模块22，则传感器3与集成后的模块电连接。传感器33可以是压电式传感器3、光敏传感器3，或红外传感器3，本申请实施例对传感器3的具体形式不做限定。
图4所示为本申请一实施例提供的一种显示设备的结构示意图。如图4所 示，显示驱动芯片2还包括：与第二控制模块23电连接的第一寄存模块25，用于当第二控制模块23接收到识别启动信号，提供指纹识别区域11′的寄存信息给指纹识别区域11′中的所有像素单元。寄存信息是指处于指纹识别模式下的指纹识别区域11′的图像外形、图像位置以及图像颜色等指纹识别区域11′的预存信息。
当第二控制模块23接收到识别启动信息，第一寄存模块25将指纹识别区域11′的寄存信息提供给指纹识别区域11′中的所有像素单元，使得屏体1上呈现指纹识别区域11′的光学图像。
可选地，第一寄存模块25集成于第二控制模块23。第一寄存模块25集成于第二控制模块23，当第二控制模块23接收到识别启动信号，第一寄存模块25将指纹识别区域11′的寄存信息提供给指纹识别区域11′中的所有像素单元，使得屏体1上呈现指纹识别区域11′的光学图像；第二控制模块控制灰阶驱动模块24分配第二百五十五灰阶电压给指纹识别区域11′中的所有像素单元，确保指纹识别的准确性，且非指纹识别区域12′不发生闪屏或亮度突变。
可选地，第二控制模块23集成于第一控制模块22形成第三控制块，第一寄存模块25也可以集成于第三控制模块。将第一控制模块22、第二控制模块23以及第一寄存模块25集成于一体，可以有效节省空间。
图5所示为本申请一实施例提供的一种显示设备的结构示意图。如图5所示，灰阶生成模块21包括：灰阶计算单元211，用于根据图像数据计算第二显示区域12中每个像素单元需要的灰阶；以及与灰阶计算单元211电连接的伽马单元212，用于生成灰阶电压区间。非指纹识别区域12′的像素单元需要不同的灰阶来实现图像的不同亮度的显示，灰阶计算单元211根据接收的图像数据计算出非指纹识别区域12′中的每个像素需要的灰阶。伽马单元212根据需要的总灰阶数，利用灰阶与灰阶电压的对应关系，利用差分运算在最高电压值与最低电压值之间计算出每一级灰阶对应的灰阶电压。
灰阶计算单元211与伽马单元212均可以是显示芯片内部独立的电路结构，也可以均是显示芯片内部微型集成的电路单元，本申请实施例对灰阶计算单元 211与伽马单元212的电路结构不做具体限定。
图6所示为本申请一实施例提供的一种显示设备的结构示意图。如图6所示，灰阶驱动模块24包括：源驱动单元241，用于运算出数字指令并发送数字指令到数模转换单元242，数字指令用于执行从灰阶电压区间中选出第二显示区域12中每个像素单元的降阶灰阶对应的灰阶电压；以及数模转换单元242，用于转换数字指令，从而实现从灰阶电压区间中选出第二显示区域12中每个像素单元的降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域12中每个像素单元。
灰阶驱动模块24需要从灰阶电压区间中选出第二显示区域12中每个像素单元的降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域12中每个像素单元。源驱动单元241运算出执行选出操作的数字指令并发送数字指令到数模转换单元242，数模转换单元241通过转化数字指令，实现从灰阶电压区间中选出第二显示区域12中每个像素单元的降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域12中每个像素单元。
图7所示为本申请一实施例提供的屏体显示方法的示意性流程图。屏体包括：第一显示区域与第二显示区域，参照图7所示，显示方法包括如下步骤：
步骤701：根据外部输入的图像数据计算第二显示区域中每个像素单元需要的灰阶；
步骤702：将计算出的第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域中每个像素单元的降阶灰阶；
步骤703：生成包括第一预设灰阶电压的灰阶电压区间；
步骤704：从灰阶电压区间中选出第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；将灰阶电压分配给第二显示区域中每个像素单元；以及
步骤705：分配第一预设灰阶电压给第一显示区域中的所有像素单元。
将计算出的第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域中每个像素单元的降阶灰阶；选出降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给第二显示区域的每个像素单元；使得第二显示区 域中的每个像素单元显示降阶灰阶。分配第一预设灰阶电压给第一显示区域中的所有像素单元；使得第一显示区域中的所有像素单元显示第一预设灰阶。由于第一显示区域中的所有像素单元显示第一预设灰阶以及第二显示区域中的每个像素单元显示降阶灰阶，从而使得第一显示区域中的所有像素单元的灰阶单独可控，有效减少第一显示区域与第二显示区域的灰阶关联引起的闪烁和亮度突变。此外，第二显示区域中的所有像素单元与第一显示区域的像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
尽管该方法以图7所示步骤顺序被描述，但这并不应该理解为只能按照图7所示步骤顺序实现该方法。该方法的执行顺序还可以是步骤703、步骤701、步骤702、步骤704和步骤705；步骤701、步骤702、步骤703、步骤705和步骤704；以及步骤703、步骤701、步骤702、步骤705和步骤704等顺序。只要步骤703在步骤704和步骤705之前；步骤701在步骤702之前；以及步骤702在步骤704之前即可，本申请实施例对步骤701、步骤702、步骤703、步骤704以及步骤705的顺序不做具体限定。
第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最小值；第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最大值。第一显示区域可以是指纹识别区域，也可以是屏下摄像头显示区域。由于灰阶电压的电压值越小，灰阶越高，亮度越亮。当第一显示区域是指纹识别区域，第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最小值，从而第一显示区域的灰阶处于最高灰阶，确保指纹区域识别的准确性。当第一显示区域是屏下摄像头显示区域，第一预设灰阶电压的电压值可以是灰阶电压区间的电压值中的最大值，从而第一显示区域的灰阶处于最低灰阶，保证屏下摄像头亮度低，避免高亮度影响拍摄效果。以上只是本申请实施例的两个具体应用场景，但并不限于上述应用场景。本申请实施例对第一预设灰阶电压不做具体限定。
可选地，第一显示区域包括指纹识别区域；第二显示区域包括非指纹识别区域。第一预设灰阶电压的电压值为灰阶电压区间的电压值中的最小值。
通过对非指纹识别区域中的每个像素单元需要的灰阶减少固定阶数以生成 降阶灰阶；通过选出降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给非指纹识别区域中的每个像素单元；使得非指纹识别区域中的每个像素单元显示降阶灰阶。通过分配第一预设灰阶电压给指纹识别区域中的所有像素单元；使得指纹识别区域的所有像素单元显示第一预设灰阶。由于第一预设灰阶电压的电压值为灰阶电压区间的电压值中的最小值，使得指纹识别区域中的所有像素单元显示最高灰阶，指纹识别区域处于最高亮度，有效提高指纹识别的准确性。同时，指纹识别区域中的所有像素单元的灰阶单独可控，有效减少第一显示区域与第二显示区域的灰阶关联引起的闪烁和亮度突变。此外，非指纹识别区域指纹识别区域中的所有像素单元与指纹识别区域中的像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
可选地，固定阶数为一阶。固定阶数为一阶时，既不影响非指纹识别区域的显示效果，又可以与指纹识别区域中像素单元存在灰阶差，从视觉上有效减少闪烁以及亮度突变。
可选地，灰阶电压区间包括零灰阶电压至第二百五十五灰阶电压；第一预设灰阶电压为包括第二百五十五灰阶电压。
由于8bit屏体是目前最常见且显示效果清晰的屏体，对应的零灰阶电压至第二百五十五灰阶电压也是常见的。根据图像数据计算非指纹识别区域中每个像素单元需要的灰阶；对非指纹识别区域中的每个像素单元需要的灰阶减少固定阶数以生成非指纹识别区域中的每个像素降阶灰阶；并生成零灰阶电压至第二百五十五灰阶电压；从零灰阶电压至第二百五十五灰阶电压选出非指纹识别区域中的每个像素的降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给非指纹识别区域中的每个像素单元；使得非指纹识别区域中的每个像素单元的显示降阶灰阶。分配二百五十五阶灰阶电压给指纹识别区域中的所有像素单元；使得指纹识别区域的所有像素单元显示二百五十五阶灰阶。指纹识别区域中的所有像素单元的灰阶单独可控，有效减少第一显示区域与第二显示区域的灰阶关联引起的闪烁和亮度突变。由于指纹识别区域显示第二百五十五灰阶，而指纹识别区域只能根据图像数据显示零灰阶至第二百五十四灰阶。非指纹识别区域中的所有像素单 元与指纹识别区域中的像素单元存在灰阶差，从视觉上也可有效减少闪烁以及亮度突变。
图8所示为本申请一实施例提供的屏体显示方法的示意性流程图，如图8所示，在步骤705：分配第一预设灰阶电压给第一显示区域中的所有像素单元；以及步骤702：将计算出的第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成第二显示区域中每个像素单元的降阶灰阶之前，显示方法还包括：步骤706：接收识别启动信号；识别启动信号用于表示显示设备需要启动指纹识别区域进行指纹识别。
识别启动信号用于表示显示设备需要启动指纹识别区域进行指纹识别。当接收到识别启动信号之后，分配第二百五十五灰阶电压给指纹识别区域中的所有像素单元，实现指纹识别区域的灰阶单独可控。
图9所示为本申请一实施例提供的屏体显示方法的示意性流程图，如图9所示，在步骤706：接收识别启动信号之后，显示方法还包括：步骤707：提供指纹识别区域的寄存信息给指纹识别区域中的所有像素单元。
寄存信息是指处于指纹识别模式下的指纹识别区域的图像外形、图像位置以及图像颜色等指纹识别区域的预存信息。在接收识别启动信号之后，提供指纹识别区域的寄存信息给指纹识别区域中的所有像素单元，使得屏体上呈现指纹识别区域的光学图像。
尽管该方法以图9所示步骤顺序被描述，但这并不应该理解为只能按照图9所示步骤顺序实现该方法。只要步骤707在步骤706之后即可，本申请实施例对步骤707以及步骤701和步骤703的执行顺序不做具体限定。
图10所示为本申请一实施例提供的屏体显示方法的示意性流程图，如图10所示，步骤704：从灰阶电压区间中选出第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压包括：
步骤7041：运算出数字指令并发送数字指令到数模转换单元，数字指令用于执行从灰阶电压区间中选出第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；以及
步骤7042；转换数字指令，从而实现从灰阶电压区间中选出第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将灰阶电压分配给第二显示区域中每个像素单元。
模块间传递的都是数字信号，先计算出数字指令，在通过数模转换，从灰阶电压区间中选出第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将降阶灰阶对应的灰阶电压分配给第二显示区域中每个像素单元。
本申请还提供了一种电子设备，包括处理器和存储器，所述存储器存有程序，所述程序被所述处理器执行时，使得所述处理器执行如上所述的屏体显示方法。以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换等，均应包含在本申请的保护范围之内。

Claims (18)

  1. 一种显示设备，包括：
    屏体，包括第一显示区域与第二显示区域；以及
    显示驱动芯片，与所述屏体电连接，用于驱动所述屏体显示发光，所述显示驱动芯片包括：
    灰阶生成模块，用于根据外部输入的图像数据计算所述第二显示区域中每个像素单元需要的灰阶，并生成包括第一预设灰阶电压的灰阶电压区间；
    第一控制模块，与所述灰阶生成模块电连接，用于控制所述灰阶生成模块将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶；
    灰阶驱动模块，与所述灰阶生成模块电连接，用于从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将所述灰阶电压分配给所述第二显示区域中每个像素单元；以及
    第二控制模块，与所述灰阶驱动模块电连接，控制所述灰阶驱动模块分配所述第一预设灰阶电压给所述第一显示区域中的所有像素单元。
  2. 根据权利要求1所述的显示设备，其中，所述第二控制模块集成于所述第一控制模块。
  3. 根据权利要求1所述的显示设备，其中，所述第一显示区域包括指纹识别区域；所述第二显示区域包括非指纹识别区域；
    其中，所述第一预设灰阶电压的电压值为所述灰阶电压区间的电压值中的最小值。
  4. 根据权利要求3所述的显示设备，其中，所述固定阶数为一阶。
  5. 根据权利要求4所述的显示设备，其中，所述灰阶电压区间包括零灰阶电压至第二百五十五灰阶电压；所述第一预设灰阶电压包括第二百五十五灰阶电压。
  6. 根据权利要求3所述的显示设备，其中，还包括：
    与所述第一控制模块和所述第二控制模块电连接的传感器，用于当感应到所述屏体处于待指纹识别状态时，发送识别启动信号给所述第一控制模块与所述第二控制模块；
    其中，所述第一控制模块配置为，当接收到所述识别启动信号，控制所述灰阶生成模块将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶；
    所述第二控制模块配置为，当接收到所述识别启动信号，控制所述灰阶驱动模块分配所述第一预设灰阶给所述第一显示区域中的所有像素单元。
  7. 根据权利要求6所述的显示设备，其中，所述显示驱动芯片还包括：与所述第二控制模块电连接的第一寄存模块，用于当所述第二控制模块接收到所述识别启动信号，提供所述指纹识别区域的寄存信息给所述指纹识别区域中的所有像素单元。
  8. 根据权利要求7所述的显示设备，其中，所述第一寄存模块集成于所述第二控制模块。
  9. 根据权利要求3所述的显示设备，其中，所述灰阶生成模块包括：灰阶计算单元，用于根据所述图像数据计算所述第二显示区域中每个像素单元需要的灰阶；以及
    与所述灰阶计算单元电连接的伽马单元，用于生成所述灰阶电压区间。
  10. 根据权利要求3所述的显示设备，其中，所述灰阶驱动模块包括：
    源驱动单元，用于运算出数字指令并发送所述数字指令到数模转换单元，其中，所述数字指令用于执行从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；以及
    所述数模转换单元，用于转换所述数字指令，实现从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将所述灰阶电压分配给所述第二显示区域中每个像素单元。
  11. 一种屏体显示方法，所述屏体包括：第一显示区域与第二显示区域，所述屏体显示方法包括：
    根据外部输入的图像数据计算所述第二显示区域中每个像素单元需要的灰阶；
    将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶；
    生成包括第一预设灰阶电压的灰阶电压区间；
    从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；
    将所述灰阶电压分配给所述第二显示区域中每个像素单元；以及
    分配所述第一预设灰阶电压给所述第一显示区域中的所有像素单元。
  12. 根据权利要求11所述的显示方法，其中，所述第一显示区域包括指纹识别区域；所述第二显示区域包括非指纹识别区域；
    其中，所述第一预设灰阶电压的电压值为所述灰阶电压区间的电压值中的最小值。
  13. 根据权利要求12所述的显示方法，，其中，所述固定阶数为一阶。
  14. 根据权利要求13所述的显示方法，其中，所述灰阶电压区间包括零灰阶电压至第二百五十五灰阶电压；所述第一预设灰阶电压为包括第二百五十五灰阶电压。
  15. 根据权利要求11所述的显示方法，其中，所述分配所述第一预设灰阶电压给所述第一显示区域中的所有像素单元；以及所述将计算出的所述第二显示区域中每个像素单元需要的灰阶减少固定阶数以生成所述第二显示区域中每个像素单元的降阶灰阶之前，还包括：
    接收识别启动信号，所述识别启动信号用于表示所述显示设备需要启动所述指纹识别区域进行指纹识别。
  16. 根据权利要求15所述的显示方法，其中，所述接收识别启动信号之后，还包括：
    提供所述指纹识别区域的寄存信息给所述指纹识别区域中的所有像素单元。
  17. 根据权利要求11所述的显示方法，其中，所述从所述灰阶电压区间中 选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压包括：
    运算出数字指令并发送所述数字指令到数模转换单元，所述数字指令用于执行从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压；以及
    转换所述数字指令，从而实现从所述灰阶电压区间中选出所述第二显示区域中每个像素单元的降阶灰阶对应的灰阶电压，并将所述灰阶电压分配给所述第二显示区域中每个像素单元。
  18. 一种电子设备，包括处理器和存储器，所述存储器存有程序，所述程序被所述处理器执行时，使得所述处理器执行如权11-17任一项所述的方法。
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