WO2024130952A1 - 显示装置和显示方法 - Google Patents

显示装置和显示方法 Download PDF

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Publication number
WO2024130952A1
WO2024130952A1 PCT/CN2023/095579 CN2023095579W WO2024130952A1 WO 2024130952 A1 WO2024130952 A1 WO 2024130952A1 CN 2023095579 W CN2023095579 W CN 2023095579W WO 2024130952 A1 WO2024130952 A1 WO 2024130952A1
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WIPO (PCT)
Prior art keywords
voltage
power supply
pixel
display device
clock signal
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Application number
PCT/CN2023/095579
Other languages
English (en)
French (fr)
Inventor
李建雷
陶治橙
康报虹
Original Assignee
惠科股份有限公司
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Publication of WO2024130952A1 publication Critical patent/WO2024130952A1/zh

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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
    • G09G3/22—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
    • 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]
    • 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
    • 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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • 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
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present application relates to the field of display technology, and in particular to a display device and a display method.
  • the minimum span voltage that the power supply module in the current display device can output is 0.1V, which means that it can only be adjusted according to the brightness span corresponding to 0.1V. In this way, when adjusting the brightness of the display screen, the adjusted brightness will be too high or too low, making it difficult to achieve the required display brightness.
  • the present application provides a display device and a display method, which can adjust the display brightness more finely to meet the brightness adjustment requirements.
  • the present application provides a display method, wherein the display device includes a display panel, the display panel has a plurality of pixel units, the pixel units include a power supply terminal, and the display device further includes:
  • a timing control module having a first signal output terminal and a second signal output terminal, the first signal output terminal is used to output a selection instruction signal, and the second signal output terminal is used to output a clock signal;
  • a power supply module includes a voltage generating unit, a voltage selecting unit and a voltage converting unit, wherein the voltage generating unit is used to generate a plurality of step voltages, the voltage selecting unit is connected to the first signal output terminal and the voltage generating unit, the voltage selecting unit is used to respond to the selection instruction signal to select at least one step voltage from the plurality of step voltages, the voltage converting unit is connected to the second signal output terminal and the voltage selecting unit, the voltage converting unit is used to respond to the clock signal to determine the supply voltage based on the step voltage, and the voltage converting unit is also connected to the power supply terminal to output the supply voltage to the power supply terminal.
  • the present application also provides a display method for driving a display panel, wherein the display panel has a plurality of pixel units, and the pixel units include a power supply terminal.
  • the display method includes:
  • a supply voltage is determined based on the step voltage according to the clock signal, and the supply voltage is output to the power supply terminal.
  • the timing control module generates a clock signal and a selection instruction signal.
  • the voltage selection unit responds to the selection instruction signal, selects at least one step voltage from a plurality of step voltages, and outputs the step voltage to the voltage conversion unit.
  • the voltage conversion unit determines the supply voltage based on the step voltage and the clock signal. It is understandable that the step voltage can generate different supply voltages as the clock signal changes. As a result, the supply voltage can be finely adjusted according to the clock signal to meet the brightness adjustment requirements.
  • FIG. 1 is a schematic structural diagram of a display device in a first embodiment of the present application.
  • FIG. 2 is a schematic diagram of the structure of the connection between the timing control module and the power supply module of FIG. 1 in the present application.
  • FIG. 3 is a schematic diagram of the structure of a pixel unit when the display device in the present application is applied to an organic light emitting diode.
  • FIG. 4 is a schematic diagram of the structure of a pixel unit when the display device in the present application is applied to a liquid crystal display panel.
  • FIG. 5 is a schematic diagram of the structure of the positive and negative polarity distribution display of the pixel unit in the liquid crystal panel of FIG. 4 in the present application.
  • FIG. 6 is a schematic diagram of the process steps of the display method in the second embodiment of the present application.
  • FIG. 7 is a flow chart of step S110 of the display method in the present application.
  • FIG. 8 is a flow chart of step S310 of the display method in the present application.
  • FIG. 9 is a flow chart showing steps S40 and S50 of the display method in the present application.
  • FIG. 10 is a schematic diagram of a step voltage output along with a clock signal in the present application.
  • the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the present application are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indications of these directions also change accordingly.
  • the technical solution of the present application can be applied in LCD (Liquid Crystal Display) and in Organic Light-Emitting Diode (OLED).
  • LCD Liquid Crystal Display
  • OLED Organic Light-Emitting Diode
  • the present application discloses a display device 10, which includes a display panel 110.
  • the display panel 110 has a plurality of pixel units. For example, if the number of pixel units is m rows and n columns, the pixel units constitute an m*n matrix display panel 110.
  • the pixel units include a power supply terminal, through which power is supplied to the pixel units to ensure that the pixel units can display normally.
  • the display device 10 also includes: a timing control module 120 and a power supply module 130.
  • the timing control module 120 and the power supply module 130 are usually arranged at the frame position of the display panel 110, which can reduce the blocking of light at the frame position to ensure that the display image is normal.
  • the timing control module 120 has a first signal output terminal and a second signal output terminal, the first signal output terminal is used to output a selection instruction signal (Step), and the second signal output terminal is used to output a clock signal (CLK); the power supply module 130 Connected to the timing control module 120, the power module 130 can receive the clock signal and the selection instruction signal. In addition, the power module 130 generates a power supply voltage according to the selection instruction signal and the clock signal, and provides the power supply voltage to the power supply terminal of the pixel unit; the normal display operation of the pixel unit is ensured by the power supply voltage.
  • the power module 130 includes: a voltage generating unit 131, a voltage selecting unit 132 and a voltage converting unit 133.
  • the voltage generating unit 131 is used to generate a plurality of step voltages. The voltage value jumps from one value to another value is called a step voltage, such as jumping from 0 to 0.1.
  • the step voltage is the minimum span voltage output by the voltage generating unit 131, such as 0.1V, 0.2V or 0.5V.
  • the voltage selecting unit 132 is connected to the first signal output terminal and the voltage generating unit 131.
  • the voltage selecting unit 132 is used to respond to the selection instruction signal, select at least one step voltage from the plurality of step voltages, and output the step voltage to the voltage converting unit 133.
  • the voltage converting unit 133 is respectively connected to the second signal output terminal and the voltage selecting unit 132. After the voltage converting unit 133 receives the clock signal, the voltage converting unit 133 responds to the clock signal and determines the supply voltage based on the step voltage. The voltage conversion unit 133 is also connected to the power supply terminal to output the power supply voltage to the power supply terminal.
  • the clock signal is a waveform signal that changes periodically. Based on the step voltage, the power supply voltage is determined by the change of the clock signal, and then fine adjustment is achieved.
  • the timing control module 120 generates a clock signal and a selection instruction signal.
  • the voltage selection unit 132 responds to the selection instruction signal, selects at least one step voltage from a plurality of step voltages, and outputs the step voltage to the voltage conversion unit 133.
  • the voltage conversion unit 133 determines the supply voltage based on the step voltage and the clock signal. It can be understood that the step voltage can generate different supply voltages as the clock signal changes. As a result, the supply voltage can be finely adjusted according to the clock signal to meet the brightness adjustment requirements.
  • the power supply module 130 is directly connected via the timing control module 120, and the clock signal is directly transmitted to the power supply module 130, so that the signal delay time is smaller.
  • PWM Pulse width modulation
  • PWM signals are usually used on constant voltage sources. There are only two results for controlling the constant voltage source: on and off. The brightness span of the adjustment is large, and the brightness distribution is discrete. However, through clock signal regulation, the accuracy of the clock signal is higher, and secondary regulation is performed on the basis of the step voltage that has been generated. The value of the step voltage is further refined, and the voltage can be further reduced on the basis of 0.1V. Therefore, the voltage rise and fall controlled by the clock signal is continuous, and the degree of refinement is higher.
  • resistors By controlling the clock signal, the use of resistors can be reduced. A large number of resistors are used to refine the voltage. After the resistance is set to generate the step voltage, the voltage is refined by multiplying the duty cycle of the clock signal by the step voltage.
  • the timing control module 120 also has a detection signal receiving end.
  • the display device 10 also includes a detection module 140, which is connected to the detection signal receiving end.
  • the detection module 140 is used to detect the ambient brightness and input the detected ambient brightness into the timing control module 120 through the detection signal receiving end.
  • the timing control module 120 is used to generate a selection instruction signal and a clock signal according to the ambient brightness.
  • the detection module 140 is a light sensor, which determines the ambient brightness of the display device 10 by receiving the amount of light around the display device 10.
  • the adjustment span of the power supply voltage can be increased by generating a clock signal, so that the brightness of the display panel 110 and the ambient brightness are matched as soon as possible to ensure that the user can see the display image clearly.
  • the brightness of the display panel 110 can be reduced as soon as possible to avoid the brightness of the display panel 110 being too bright and hurting the human eye.
  • the adjustment span of the power supply voltage can be reduced by generating a clock signal, so that the user can find the display brightness of the display panel 110 that is adapted to the ambient brightness and achieve fine adjustment.
  • the pixel unit includes an organic light emitting diode 113.
  • the power supply end of the pixel unit is the cathode or anode of the organic light emitting diode 113.
  • the cathode or anode of the organic light emitting diode 113 is connected to the power module 130.
  • the pixel unit also includes a first response switch T1, a second response switch T2 and a capacitor C.
  • the first end of the first response switch T1 is connected to the data line 112
  • the second end of the first response switch T1 is connected to the first end of the capacitor C
  • the control end of the first response switch T1 is connected to the scan line 111.
  • the first end of the second response switch T2 is connected to the working voltage end (ELVDD), the second end of the capacitor C is connected to the line between the second response switch T2 and the working voltage end, and the control end of the second response switch T2 is connected to the line between the second end of the first response switch T1 and the capacitor C.
  • the second end of the second response switch T2 is connected to the anode of the organic light emitting diode 113, and the cathode of the organic light emitting diode 113 is connected to the common ground end (ELVSS).
  • the first end is a signal input end
  • the second end is a signal output end
  • the control end of the response switch is a gate
  • the first end of the response switch is a source
  • the second end of the response switch is a drain.
  • the cathode of the organic light emitting diode 113 is connected to the power module 130, which can be understood as the common ground terminal connected to the power module 130, and the anode of the organic light emitting diode 113 is connected to the power module 130, which can be understood as the working voltage terminal connected to the power module 130.
  • the supply voltage can be adjusted at the anode end of the light emitting diode or at the cathode end of the light emitting diode.
  • the light emitting diode needs a closed circuit. The voltage can be adjusted at one point in the loop, thereby controlling the brightness of the light-emitting diode.
  • the technical solution of the present application is applied in a liquid crystal display panel.
  • Display frequency conversion technology is often used in the liquid crystal display panel 110 to achieve a dynamic refresh rate of the display panel 110.
  • the dynamic refresh rate minimizes input delay and reduces or completely eliminates stuttering, screen distortion and tearing problems by synchronizing the refresh rate of a compatible display and the frame rate of a user's graphics card.
  • a frame of the display panel 110 is divided into an Active area for display time and a Blank area for pause before entering the next frame.
  • the display panel 110 with a dynamic refresh rate of 48Hz-240Hz is taken as an example.
  • the resolution of the display panel 110 is 1920*1080.
  • a total of 1080 lines need to be scanned and charged.
  • the charging time of these 1080 lines is the Active area. Then it pauses for 45 lines.
  • the charging time of these 45 lines is the Blank area.
  • the dynamic refresh rate is to change the refresh rate by changing the number of lines in the Blank area. For example, at a low refresh rate, the Blank area is extended, and at a high refresh rate, the Blank area is shortened.
  • the liquid crystal display panel 110 maintains brightness by maintaining a voltage difference on both sides of the liquid crystal after scanning and charging. Because in the Blank area, both sides of the liquid crystal will slowly leak electricity. If the Blank area time is too long and the leakage is serious, the brightness of the display panel 110 will change. As a result, the refresh rate switching will cause changes in brightness and darkness that are perceptible to the naked eye.
  • the pixel unit includes a driving transistor T0, a pixel electrode, a common electrode and a liquid crystal layer, the control end of the driving transistor T0 is connected to the scan line 111, the first end of the driving transistor T0 is connected to the data line 112, the second end of the driving transistor T0 is connected to the pixel electrode, the common electrode is connected to the power supply end, the pixel electrode and the common electrode are located on both sides of the liquid crystal layer, and the pixel electrode and the common electrode form a liquid crystal capacitor C1.
  • the liquid crystal capacitor C1 generates a regulating voltage, and the regulating voltage acts on the liquid crystal layer, thereby changing the rotation direction of the liquid crystal molecules in the liquid crystal layer.
  • the power module 130 is used to provide a power supply voltage to the common electrode of the liquid crystal capacitor C1.
  • the power supply voltage provided to the liquid crystal capacitor C1 by the power module 130 is used to achieve fine adjustment of the voltage of the liquid crystal capacitor C1, thereby more accurately controlling the steering of the liquid crystal molecules.
  • the pixel unit also includes a common signal line, the common signal line and the pixel electrode are arranged in the same layer, the common signal line and the pixel electrode are insulated and spaced, the common signal line and the common electrode form a storage capacitor C2, and the common signal line is connected to the power supply end.
  • the liquid crystal capacitor C1 and the storage capacitor C2 are connected in parallel, the power module 130 charges the storage capacitor C2, and the storage capacitor C2 maintains the voltage of the liquid crystal capacitor C1 through capacitive coupling, and compensates the voltage of the liquid crystal capacitor C1 in the blank area to compensate for the leakage, thereby reducing the rotation of the liquid crystal molecules due to leakage, keeping the rotation state of the liquid crystal molecules unchanged, and reducing the light and dark changes during frequency switching.
  • positive and negative voltages are usually applied alternately to the pixel units, thereby preventing the liquid crystal molecules from being polarized by a single polarity voltage.
  • a plurality of pixel units are The element includes a first sub-pixel 101 and a second sub-pixel 102, the display polarities of the first sub-pixel 101 and the second sub-pixel 102 are opposite, the power supply module 130 is respectively connected to the power supply end of the first sub-pixel 101 and the power supply end of the second sub-pixel 102, and the power supply module 130 is used to provide a supply voltage with opposite positive and negative polarities to the first sub-pixel and the second sub-pixel.
  • the first sub-pixel 101 and the second sub-pixel 102 can be alternately distributed on the display panel 110, and the display polarity on the same data line 112 is the same.
  • the first sub-pixel 101 is displayed with positive polarity
  • the second sub-pixel 102 is displayed with negative polarity. If the first sub-pixel 101 is displayed with negative polarity, and the second sub-pixel 102 is displayed with positive polarity.
  • the first sub-pixel 101 and the second sub-pixel 102 are powered separately, which is more targeted.
  • the positive and negative polarities of the first sub-pixel 101 and the second sub-pixel 102 are alternately changed.
  • the positive polarity means that the power supply voltage is greater than the voltage of the common electrode of the liquid crystal capacitor C1
  • the negative polarity means that the power supply voltage is less than the voltage of the common electrode of the liquid crystal capacitor C1.
  • the present application further provides a display method, which is applied to drive a display panel, the display panel having a plurality of pixel units, the pixel units including a power supply terminal, the display panel being an organic light emitting diode or a liquid crystal display panel, and the display method comprising:
  • Step S10 generating a selection instruction signal and a clock signal; the selection instruction signal is used to control the selection step voltage, and the clock signal is a periodically changing pulse signal, usually a square waveform pulse signal.
  • Step S20 generating a plurality of step voltages, and selecting at least one step voltage from the plurality of step voltages according to a selection instruction signal.
  • Step S30 determine the supply voltage based on the step voltage according to the clock signal, and output the supply voltage to the power supply end.
  • the clock signal changes periodically, and the step voltage can also change periodically according to the clock signal.
  • the step voltage is the minimum span voltage. By combining with the clock signal, it can reach a voltage less than the step voltage, thereby realizing fine adjustment of the supply voltage.
  • At least one step voltage is selected from a plurality of step voltages according to the selection instruction signal, and the supply voltage is determined according to the clock signal based on the step voltage. It can be understood that the step voltage can generate different supply voltages as the clock signal changes. Thus, the supply voltage can be finely adjusted according to the clock signal to meet the brightness adjustment requirements.
  • the steps of generating the selection instruction signal and the clock signal include:
  • Step S110 obtaining the ambient brightness, and generating a selection instruction signal and a clock signal based on the ambient brightness.
  • the duty cycle of the clock signal generated for different ambient brightness is different.
  • the duty cycle is the ratio of the pulse width of the clock signal to the pulse period.
  • the pulse width is the time length of the high level in the clock signal
  • the pulse period is the time length of a complete pulse waveform. It can be seen that the duty cycle is the ratio of the time length of the high level to the time length of the complete pulse wavelength. Usually, the time length of the pulse period remains unchanged.
  • the duty cycle generated is changed by adjusting the duration of the high level, and the corresponding clock signal also changes.
  • the display brightness needs to be adjusted it can be completed by changing the pulse width of the clock signal.
  • the duty cycle of the clock signal changes with the change of the ambient brightness.
  • the difference between the ambient brightness and the brightness of the display panel 110 is large, or when the difference between the ambient brightness and the brightness of the display panel 110 is small, the fineness can be controlled by the generated clock signal, thereby achieving the required brightness in a short time.
  • the duty cycle is increased to make the brightness of the display panel 110 match the ambient brightness as soon as possible to ensure that the user can see the display image clearly.
  • the brightness of the display panel 110 is reduced as soon as possible to avoid the brightness of the display panel 110 being too bright and hurting the human eye.
  • the user can find the display brightness of the display panel 110 that is adapted to the ambient brightness, thereby avoiding over-adjustment that causes the display brightness to exceed a more suitable level.
  • the step of determining the supply voltage based on the step voltage according to the clock signal includes:
  • Step S310 select the step voltage as the reference voltage, and multiply the duty cycle by the reference voltage to generate the supply voltage.
  • the step voltage multiplied by the duty cycle is equivalent to multiplying by a decimal, so that the step voltage is further reduced to achieve an adjustment less than the step voltage.
  • the voltage generating unit 131 can output n step voltages with a difference of 0.1V, and one of them is selected as the reference voltage.
  • the duty cycle multiplied by the reference voltage is the supply voltage.
  • the duration of the pulse cycle remains unchanged.
  • the duty cycle generated is changed by adjusting the duration of the high level, and the corresponding clock signal also changes.
  • the display brightness needs to be adjusted, it can be completed by changing the pulse width of the clock signal.
  • the method includes:
  • Step S40 selecting another step voltage adjacent to the reference voltage as the superimposed voltage; in order to increase the brightness of the picture, two voltages may be applied one after the other in a short period of time, and the human eye sees two lights superimposed together.
  • Step S50 when the pulse period of the clock signal is less than or equal to the preset threshold, the preset threshold is 1 millisecond, and the human eye cannot recognize it within 1 millisecond.
  • the power supply voltage is high, the power supply voltage is provided to the power supply terminal, and when the power supply voltage is low, the superimposed voltage is Provided to the power supply end.
  • the voltage selection unit 132 outputs two adjacent step voltages m and m-1 according to the selection command signal Step of the timing control module 120, where n ⁇ m ⁇ 2.
  • the voltage conversion unit After reaching the voltage conversion unit, according to the waveform of the clock signal CLK, when CLK is at a high level H, the mth step voltage is output, and when CLK is at a low level L, the m-1th step voltage is output.
  • Light intensity is a cumulative effect.
  • the CLK frequency is greater than 1KHz, i.e., less than 1 millisecond. The human eye will not feel the flicker of CLK switching at all.
  • the light intensity felt by the human eye is the luminous intensity when the m-1 step voltage plus 0.1V*(CLK H time/CLK cycle time) voltage is used as the power supply voltage, thereby achieving delicate compensation of light intensity.
  • the 3.3V clock signal is at a high level
  • the 0V clock signal is at a low level.
  • the step voltage (OUT) Step m is output at a high level
  • the step voltage (OUT) Step m-1 is output at a low level.

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Abstract

一种显示装置(10)和显示方法。其中，显示装置(10)包括显示面板(110)，显示面板(110)具有多个像素单元，像素单元包括有供电端，显示装置(10)还包括：时序控制模块(120)和电源模块(130)，时序控制模块(120)具有第一信号输出端和第二信号输出端，第一信号输出端用于输出选择指令信号(Step)，第二信号输出端用于输出时钟信号(CLK)；电源模块(130)包括电压产生单元(131)、电压选择单元(132)及电压转化单元(133)，电压产生单元(131)用于生成多个阶跃电压，电压选择单元(132)用于响应选择指令信号(Step)以在多个阶跃电压中选择至少一个阶跃电压，电压转化单元(133)用于响应时钟信号(CLK)以在阶跃电压的基础上确定供电电压，电压转化单元(133)用于将供电电压输出至供电端。

Description

显示装置和显示方法
本申请要求于2022年12月19日提交中国专利局，申请号为2022116316189，申请名称为“显示装置和显示方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，特别涉及一种显示装置和显示方法。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
用户在使用显示设备时，经常需要调整显示屏幕的亮度，保证用户能够看清显示屏幕的内容。但是，目前的显示设备中供电模块能够输出的最小跨度电压在0.1V，也就是说只能按照0.1V对应的亮度跨度进行调整。这样，在调整显示屏幕的亮度时，会导致调整的亮度过高或者过低，难以达到满足要求的显示亮度。
发明内容
本申请提供一种显示装置和显示方法，能够更加精细的调整显示亮度，满足亮度调节要求。
根据本申请的一个方面，本申请提供一种显示方法，所述显示装置包括显示面板，所述显示面板具有多个像素单元，所述像素单元包括有供电端，所述显示装置还包括：
时序控制模块，所述时序控制模块具有第一信号输出端和第二信号输出端，所述第一信号输出端用于输出选择指令信号，所述第二信号输出端用于输出时钟信号；
电源模块，包括电压产生单元、电压选择单元及电压转化单元，所述电压产生单元用于生成多个阶跃电压，所述电压选择单元与所述第一信号输出端和所述电压产生单元连接，所述电压选择单元用于响应所述选择指令信号以在所述多个阶跃电压中选择至少一个阶跃电压，所述电压转化单元与所述第二信号输出端及所述电压选择单元连接，所述电压转化单元用于响应所述时钟信号以在所述阶跃电压的基础上确定供电电压，所述电压转化单元还与所述供电端连接，以用于将所述供电电压输出至所述供电端。
本申请还提供一种显示方法，用于驱动显示面板，所述显示面板具有多个像素单元，所述像素单元包括有供电端，所述显示方法包括：
生成选择指令信号和时钟信号；
生成多个阶跃电压，依据所述选择指令信号在所述多个阶跃电压中选择至少一个阶跃电压；
依据所述时钟信号在所述阶跃电压的基础上确定供电电压，并将所述供电电压输出至所述供电端。
本申请的技术方案中，时序控制模块生成时钟信号和选择指令信号。电压选择单元响应选择指令信号，在多个阶跃电压中选择至少一个阶跃电压，并将这个阶跃电压输出给电压转化单元。电压转化单元接收到这个阶跃电压后，以这个阶跃电压为基础，依据时钟信号确定供电电压。可以理解的是，阶跃电压能够随着时钟信号的变化而生成不同的供电电压。由此，供电电压能够根据时钟信号进行精细化调节，满足亮度调节要求。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性的，并不能限制本申请。
附图说明
通过参照附图详细描述其示例实施例，本申请的上述和其它目标、特征及优点将变得更加显而易见。
图1是本申请中第一实施例中显示装置的结构示意图。
图2是本申请中图1时序控制模块和电源模块连接的结构示意图。
图3是本申请中显示装置应用在有机发光二极管时像素单元的结构示意图。
图4是本申请中显示装置应用在液晶显示面板时像素单元的结构示意图。
图5是本申请中图4液晶面板中像素单元的正负极性分布显的结构示意图。
图6是本申请中第二实施例中显示方法的流程步骤示意图。
图7是本申请中显示方法的步骤S110的流程示意图。
图8是本申请中显示方法的步骤S310的流程示意图。
图9是本申请中显示方法的步骤S40和步骤S50的流程示意图。
图10是本申请中随着时钟信号输出的阶跃电压示意图。
本发明的实施方式
尽管本申请可以容易地表现为不同形式的实施方式，但在附图中示出并且在本说明书中将详细说明的仅仅是其中一些具体实施方式，同时可以理解的是本说明书应视为是本申请原理的示范性说明，而并非旨在将本申请限制到在此所说明的那样。
由此，本说明书中所指出的一个特征将用于说明本申请的一个实施方式的其中一个特征，而不是暗示本申请的每个实施方式必须具有所说明的特征。此外，应当注意的是本说明书描述了许多特征。尽管某些特征可以组合在一起以示出可能的***设计，但是这些特征也可用于其他的未明确说明的组合。由此，除非另有说明，所说明的组合并非旨在限制。
在附图所示的实施方式中，方向的指示(诸如上、下、左、右、前和后)用于解释本申请的各种元件的结构和运动不是绝对的而是相对的。当这些元件处于附图所示的位置时，这些说明是合适的。如果这些元件的位置的说明发生改变时，则这些方向的指示也相应地改变。
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些示例实施方式使得本申请的描述将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。附图仅为本申请的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
以下结合本说明书的附图，对本申请的较佳实施方式予以进一步地详尽阐述。
实施例一
本申请的技术方案可以应用在LCD(Liquid Crystal Display，液晶显示)中，也可以用在有机发光二极管(Organic Light-Emitting Diode，OLED)中。
参阅图1和图2所示，本申请公开了一种显示装置10，显示装置10包括显示面板110，显示面板110具有多个像素单元，比如像素单元的数量为m行，n列，则像素单元构成m*n矩阵的显示面板110。像素单元包括有供电端，通过供电端向像素单元供电，保证像素单元能够正常显示。显示装置10还包括：时序控制模块120和电源模块130，时序控制模块120和电源模块130通常设置于显示面板110的边框位置，在边框位置能够减少对光线的遮挡，保证显示画面正常。
时序控制模块120具有第一信号输出端和第二信号输出端，第一信号输出端用于输出选择指令信号(Step)，第二信号输出端用于输出时钟信号(CLK)；电源模块130 连接时序控制模块120，电源模块130能够接收时钟信号和选择指令信号。并且，电源模块130依据选择指令信号和时钟信号生成供电电压，并将供电电压提供至像素单元的供电端；通过供电电压保证像素单元的正常显示工作。
进一步地，电源模块130包括：电压产生单元131、电压选择单元132和电压转化单元133，电压产生单元131用于生成多个阶跃电压(step voltage)，电压值从一个值跳变到另一个值称为阶跃电压，比如从0跳变到0.1。阶跃电压是电压产生单元131输出的最小跨度电压，例如0.1V、0.2V或是0.5V等；电压选择单元132与第一信号输出端和电压产生单元131连接，电压选择单元132用于响应选择指令信号，在多个阶跃电压中选择至少一个阶跃电压，并将该阶跃电压输出给电压转化单元133。需要说明的是，电压产生单元131生成的多个阶跃电压的大小是相等的；电压转化单元133分别连接第二信号输出端和电压选择单元132，电压转化单元133接收到时钟信号后，电压转化单元133响应时钟信号，在阶跃电压的基础上确定供电电压。电压转化单元133还与供电端连接，以用于将供电电压输出至供电端。时钟信号是周期变化的波形信号，以阶跃电压为基础，通过时钟信号的变化确定供电电压，继而实现精细化调节。
本实施例的技术方案中，时序控制模块120生成时钟信号和选择指令信号。电压选择单元132响应选择指令信号，在多个阶跃电压中选择至少一个阶跃电压，并将这个阶跃电压输出给电压转化单元133。电压转化单元133接收到这个阶跃电压后，以这个阶跃电压为基础，依据时钟信号确定供电电压。可以理解的是，阶跃电压能够随着时钟信号的变化而生成不同的供电电压。由此，供电电压能够根据时钟信号进行精细化调节，满足亮度调节要求。
需要进一步指出的是，本申请中通过时序控制模块120直接连接电源模块130，直接向电源模块130传输时钟信号，信号的延迟时间更小。
另外，相比用在背光控制的PWM(Pulse width modulation)脉冲宽度调制信号，本方案能够实现更精细化调节。PWM信号通常用在恒压源上，控制恒压源只有通和断两种结果，调节的亮度跨度较大，亮度分布是离散的。而通过时钟信号调节，时钟信号的精度较高，在已经产生阶跃电压的基础上，进行二级调节。进一步细化阶跃电压的数值，在0.1V的基础上还能够进一减小电压。从而时钟信号控制的电压升降是连续的，精细化程度更高。
还需要指出的是，通过时钟信号的控制，能够减少电阻的使用。不需要通过设置 大量电阻来细化电压，在设置了满足产生阶跃电压的电阻后，通过时钟信号的占空比和阶跃电压相乘的方式来细化电压。
为了能够清楚了解亮度的调整方向，时序控制模块120还具有侦测信号接收端。显示装置10还包括侦测模块140，侦测模块140连接侦测信号接收端，侦测模块140用于侦测环境亮度，并将侦测的环境亮度经侦测信号接收端输入至时序控制模块120的内部。时序控制模块120用于依据环境亮度生成选择指令信号和时钟信号。侦测模块140为光线传感器，光线传感器通过接收显示装置10周围光线数量，以此来判断显示装置10的环境亮度。
在环境亮度和显示面板110的亮度差异较大时，可以通过生成的时钟信号，提高供电电压的调整跨度，从而尽快使显示面板110的亮度和环境亮度符合，保证用户能够看清显示画面。或者是，尽快降低显示面板110的亮度，避免显示面板110的亮度过亮，刺痛人眼。
在环境亮度和显示面板110的亮度差异较小时，可以通过生成的时钟信号，减小供电电压的调整跨度，使用户能够找到显示面板110与环境亮度相适应的显示亮度，实现精细调节。
参阅图3所示，本申请的技术方案应用在机发光二极管的显示面板110中，像素单元包括有机发光二极管113，像素单元的供电端为有机发光二极管113的阴极或阳极，有机发光二极管113的阴极或阳极连接电源模块130。像素单元还包括第一响应开关T1、第二响应开关T2和电容C，第一响应开关T1的第一端连接数据线112，第一响应开关T1的第二端连接电容C的第一端，第一响应开关T1的控制端连接扫描线111。第二响应开关T2的第一端连接工作电压端(ELVDD)，电容C的第二端连接第二响应开关T2和工作电压端之间的线路，第二响应开关T2的控制端连接第一响应开关T1的第二端和电容C之间的线路。第二响应开关T2的第二端连接有机发光二极管113的阳极，有机发光二极管113的阴极连接公共接地端(ELVSS)。第一端为信号输入端，第二端为信号输出端，响应开关的控制端为栅极，响应开关的第一端为源极，响应开关的第二端为漏极。
其中，有机发光二极管113的阴极连接电源模块130，可以理解为公共接地端连接电源模块130，有机发光二极管113的阳极连接电源模块130，可以理解为工作电压端连接电源模块130。由此可知，供电电压可以在发光二极管的阳极端进行调节，也可以在发光二极管的阴极端进行调节。发光二极管发光需要一个电路闭合的回路， 在回路上的一点就可以完成电压大小的调节，从而控制发光二极管的亮度。
参阅图4所示，本申请的技术方案应用在液晶显示面板中，在液晶显示面板110中经常采用显示变频技术，来实现显示面板110的动态刷新率。动态刷新率通过对兼容显示器的刷新率和用户显卡的帧速率进行同步，最大限度地缩短输入延迟，并减少或完全消除卡顿花屏和撕裂问题。显示面板110的一帧分为显示时间Active(活跃)区和进入下一帧前的停顿Blank(空白)区。
假设以动态刷新率在48Hz-240Hz的显示面板110为例，显示面板110的分辨率是1920*1080，总共需扫描充电1080行，这1080行充电时间就是Active区，然后停顿45行，这45行充电时间就是Blank区，动态刷新率就是通过改变Blank区时间行数改变刷新率。例如，低刷新率时，延长Blank区，高刷新率时缩短Blank区。但是，液晶显示面板110通过扫描充电后在液晶两侧维持压差来维持亮度，由于在Blank区时，液晶两侧会缓慢漏电。如果Blank区时间过长，漏电严重，显示面板110的亮度会出现变化。导致刷新率切换就会出现肉眼可感的亮暗变化。
为此，本申请的技术方案中，像素单元包括驱动晶体管T0、像素电极、公共电极和液晶层，驱动晶体管T0的控制端连接扫描线111，驱动晶体管T0的第一端连接数据线112，驱动晶体管T0的第二端连接像素电极，公共电极连接供电端，像素电极和公共电极位于液晶层的两侧，像素电极和公共电极形成液晶电容C1。液晶电容C1产生调节电压，调节电压作用在液晶层上，从而改变液晶层中液晶分子的转动方向。电源模块130用于向液晶电容C1的公共电极提供供电电压。在空白区，通过电源模块130向液晶电容C1提供的供电电压，实现对液晶电容C1的电压精细调节，进而更准确的控制液晶分子的转向。
进一步地，像素单元还包括公共信号线，公共信号线和像素电极同层设置，公共信号线和像素电极绝缘间隔，公共信号线和公共电极形成存储电容C2，公共信号线连接供电端。液晶电容C1和存储电容C2并联，电源模块130通过向存储电容C2充电，存储电容C2通过电容耦合维持液晶电容C1的电压，在空白区对液晶电容C1的电压进行补偿，补偿漏电量，由此减少液晶分子由于漏电导致的转动，保持液晶分子的转动状态不变，减少频率切换时的明暗变化。
参阅图5所示，本申请的显示面板110中，为了避免液晶分子极化，通常交替给像素单元施加正负交替的电压，从而避免液晶分子受到单一极性电压导致极化。像素单元的显示极性有两种，一种正极性显示，另一种负极性显示。具体地，多个像素单 元包括第一子像素101和第二子像素102，第一子像素101和第二子像素102的显示极性相反，电源模块130分别连接第一子像素101的供电端和第二子像素102的供电端，电源模块130用于向第一子像素和第二子像素正负极性相反的供电电压。
第一子像素101和第二子像素102可以交替分布在显示面板110上，同一条数据线112上的显示极性相同。比如，第一子像素101正极性显示，第二子像素102负极性显示。如果，第一子像素101负极性显示，第二子像素102正极性显示。对第一子像素101和第二子像素102分开供电，针对性更强。需要说明的是，第一子像素101和第二子像素102的正负极性是交替变化的。其中，正极性是指，供电电压大于液晶电容C1的公共电极的电压，负极性是指，供电电压小于液晶电容C1的公共电极的电压。
实施例二
参阅图6所示，本申请还提供一种显示方法，显示方法应用于驱动显示面板，显示面板具有多个像素单元，像素单元包括有供电端，显示面板为有机发光二极管或者是液晶显示面板，显示方法包括：
步骤S10，生成选择指令信号和时钟信号；选择指令信号用于控制选择阶跃电压，时钟信号是周期变化的脉冲信号，通常是方波形脉冲信号。
步骤S20，生成多个阶跃电压，依据选择指令信号在多个阶跃电压中选择至少一个阶跃电压。
步骤S30，依据时钟信号在阶跃电压的基础上确定供电电压，并将供电电压输出至供电端。时钟信号是周期性变化的，阶跃电压依据时钟信号，同样也可以产生周期性的变化，阶跃电压是最小跨度电压，通过和时钟信号结合，能够达到小于阶跃电压的电压，从而实现供电电压的精细化调节。
本实施例的技术方案中，依据选择指令信号，在多个阶跃电压中选择至少一个阶跃电压，并以这个阶跃电压为基础，依据时钟信号确定供电电压。可以理解的是，阶跃电压能够随着时钟信号的变化而生成不同的供电电压。由此，供电电压能够根据时钟信号进行精细化调节，满足亮度调节要求。
参阅图7所示，为了能够清楚了解亮度的调整方向，生成选择指令信号和时钟信号的步骤，包括：
步骤S110，获取环境亮度，基于环境亮度生成选择指令信号和时钟信号。其中， 不同环境亮度生成的时钟信号的占空比不同。占空比是时钟信号的脉冲宽度和脉冲周期的比值。脉冲宽度就是时钟信号中高电平的时间长度，脉冲周期就是一个完整脉冲波形的时间长度。由此可知，占空比就是高电平的时间长度和完整脉冲波长时间长度比值。通常，脉冲周期的时间长度不变，在需要调节显示面板110的亮度时，通过调整高电平的持续时间，生成的占空比随着改变，相应的时钟信号也发生改变。在需要调节显示亮度时，只要改变时钟信号的脉冲宽度就可以完成。
进而可知，时钟信号的占空比随着环境亮度的变化而变化。在环境亮度和显示面板110的亮度差异较大时，或者是，在环境亮度和显示面板110的亮度差异较小时，可以通过生成的时钟信号来控制精细程度，进而短时间内达到需要调整的亮度。
例如，在环境亮度和显示面板110的亮度差异较大时，提高占空比，从而尽快使显示面板110的亮度和环境亮度符合，保证用户能够看清显示画面。或者是，尽快降低显示面板110的亮度，避免显示面板110的亮度过亮，刺痛人眼。
在环境亮度和显示面板110的亮度差异较小时，通过降低占空比，减小供电电压的调整跨度，使用户能够找到显示面板110与环境亮度相适应的显示亮度，不至于出现过度调节，导致跨过了比较适合的显示亮度。
参阅图8，为了能够更加灵活的调整显示面板110的亮度，依据时钟信号在阶跃电压的基础上确定供电电压的步骤，包括：
步骤S310，选取阶跃电压作为基准电压，将占空比与基准电压相乘生成供电电压。阶跃电压乘以占空比，相当于乘以一个小数，从而使阶跃电压进一步减小，实现小于阶跃电压的调整。如电压产生单元131可以输出n个相差0.1V的阶跃电压，选择其中一个作为基准电压，占空比乘以这个基准电压就是供电电压。
通常，脉冲周期的时间长度不变，在需要调节显示面板110的亮度时，通过调整高电平的持续时间，生成的占空比随着改变，相应的时钟信号也发生改变。在需要调节显示亮度时，只要改变时钟信号的脉冲宽度就可以完成。
参阅图2和图9所示，依据时钟信号在阶跃电压的基础上确定供电电压的步骤之后，包括：
步骤S40，选取邻近基准电压的另一阶跃电压作为叠加电压；为了提高画面亮度，可以在短时间内前后施加两个电压，人眼看去是两个光亮叠加在一起。
步骤S50，在时钟信号的脉冲周期小于或等于预设阈值时，预设阈值为1毫秒，1毫秒内人眼无法识别。在高电平时将供电电压提供至供电端，在低电平时将叠加电压 提供至供电端。
参阅图10所示，电压选择单元132根据时序控制模块120的选择指令信号Step，输出相邻的m和m-1两个阶跃电压，n≥m≥2，到达电压转化单元后，根据时钟信号CLK波形，当CLK为高准位H时输出第m阶跃电压，当CLK为低准位L时输出第m-1阶跃电压。光强是一种累积效果，CLK频率大于1KHz，即小于1毫秒，人眼完全不会感觉到CLK切换的闪烁，人眼感觉到的光强是m-1的阶跃电压加上0.1V*(CLK H的时间/CLK的周期时间)电压做为供电电压时的发光强度，以此实现光强的细腻化补偿。其中，3.3V时钟信号高电平，0V时钟信号低电平，在高电平输出(OUT)Step m阶跃电压，在低电平输出(OUT)Step m-1阶跃电压。
虽然已参照几个典型实施方式描述了本申请，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本申请能够以多种形式具体实施而不脱离发明的精神或实质，所以应当理解，上述实施方式不限于任何前述的细节，而应在随附权利要求所限定的精神和范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。

Claims (17)

  1. 一种显示装置，所述显示装置包括显示面板，所述显示面板具有多个像素单元，所述像素单元包括有供电端，其中，所述显示装置还包括：
    时序控制模块，所述时序控制模块具有第一信号输出端和第二信号输出端，所述第一信号输出端用于输出选择指令信号，所述第二信号输出端用于输出时钟信号；
    电源模块，包括电压产生单元、电压选择单元及电压转化单元，所述电压产生单元用于生成多个阶跃电压，所述电压选择单元与所述第一信号输出端和所述电压产生单元连接，所述电压选择单元用于响应所述选择指令信号以在所述多个阶跃电压中选择至少一个阶跃电压，所述电压转化单元与所述第二信号输出端及所述电压选择单元连接，所述电压转化单元用于响应所述时钟信号以在所述阶跃电压的基础上确定供电电压，所述电压转化单元还与所述供电端连接，以用于将所述供电电压输出至所述供电端。
  2. 根据权利要求1所述的显示装置，其中，
    所述时序控制模块还具有侦测信号接收端；
    所述显示装置还包括侦测模块，所述侦测模块连接所述侦测信号接收端，所述侦测模块用于侦测环境亮度，并将侦测的环境亮度经所述侦测信号接收端输入至所述时序控制模块的内部；
    其中，所述时序控制模块用于依据所述环境亮度生成所述选择指令信号和所述时钟信号。
  3. 根据权利要求2所述的显示装置，其中，所述侦测模块为光线传感器，用于通过接收所述显示装置周围光线数量，以判断所述显示装置的环境亮度
  4. 根据权利要求1所述的显示装置，其中，所述像素单元包括有机发光二极管，所述像素单元的供电端为所述有机发光二极管的阳极。
  5. 根据权利要求4所述的显示装置，其中，所述像素单元还包括第一响应开关、第二响应开关和电容，所述第一响应开关的第一端连接数据线，所述第一响应开关的第二端连接所述电容的第一端，所述第一响应开关的控制端连接扫描线，所述第二响应开关的第一端连接工作电压端，所述电容的第二端连接所述第二响应开关和所述工作电压端之间的线路，所述第二响应开关的控制端连接所述第一响应开关的第二端和所述电容之间的线路，所述第二响应开关的第二端连接所述有机发光二极管的阳极，所述有机发光二极管的阴极连接公共接地端。
  6. 根据权利要求4所述的显示装置，其中，有机发光二极管的阴极连接电源模块。
  7. 根据权利要求4所述的显示装置，其中，有机发光二极管的阳极连接电源模块。
  8. 根据权利要求1所述的显示装置，其中，所述像素单元包括有机发光二极管，所述像素单元的供电端为所述有机发光二极管的阴极。
  9. 根据权利要求1所述的显示装置，其中，所述像素单元包括驱动晶体管、像素电极、公共电极和液晶层，所述驱动晶体管的控制端连接扫描线，所述驱动晶体管的第一端连接数据线，所述驱动晶体管的第二端连接所述像素电极，所述公共电极连接所述供电端，所述像素电极和所述公共电极位于所述液晶层的两侧，所述像素电极和所述公共电极形成液晶电容。
  10. 根据权利要求9所述的显示装置，其中，所述像素单元还包括公共信号线，所述公共信号线和所述像素电极绝缘间隔，所述公共信号线和所述公共电极形成存储电容，所述公共信号线连接所述供电端。
  11. 根据权利要求9所述的显示装置，其中，所述液晶电容和所述存储电容并联，所述电源模块通过向所述存储电容充电，所述存储电容通过电容耦合维持所述液晶电容的电压。
  12. 根据权利要求1所述的显示装置，其中，所述多个像素单元包括第一子像素和第二子像素，所述第一子像素和所述第二子像素的显示极性相反，所述电源模块分别连接所述第一子像素的供电端和所述第二子像素的供电端，所述电源模块用于向所述第一子像素和所述第二子像素正负极性相反的供电电压。
  13. 根据权利要求12所述的显示装置，其中，所述第一子像素和所述第二子像素交替分布在所述显示面板上，同一条数据线上的显示极性相同。
  14. 一种显示方法，用于驱动显示面板，所述显示面板具有多个像素单元，所述像素单元包括有供电端，其中，所述显示方法包括：
    生成选择指令信号和时钟信号；
    生成多个阶跃电压，依据所述选择指令信号在所述多个阶跃电压中选择至少一个 阶跃电压；
    依据所述时钟信号在所述阶跃电压的基础上确定供电电压，并将所述供电电压输出至所述供电端。
  15. 根据权利要求14所述的显示方法，其中，所述生成选择指令信号和时钟信号的步骤，包括：
    获取环境亮度，基于所述环境亮度生成所述选择指令信号和所述时钟信号；
    其中，不同环境亮度生成的所述时钟信号的占空比不同。
  16. 根据权利要求15所述的显示方法，其中，所述依据所述时钟信号在所述阶跃电压的基础上确定供电电压的步骤，包括：
    选取所述阶跃电压作为基准电压，将所述占空比与所述基准电压相乘生成所述供电电压。
  17. 根据权利要求16所述的显示方法，其中，所述依据所述时钟信号在所述阶跃电压的基础上确定供电电压的步骤之后，包括：
    选取邻近所述基准电压的另一阶跃电压作为叠加电压；
    在所述时钟信号的脉冲周期小于或等于预设阈值时，在高电平时将所述供电电压提供至所述供电端，在低电平时将所述叠加电压提供至所述供电端。
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