WO2023108686A1 - 多路复用显示面板、装置及驱动方法 - Google Patents

多路复用显示面板、装置及驱动方法 Download PDF

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Publication number
WO2023108686A1
WO2023108686A1 PCT/CN2021/139755 CN2021139755W WO2023108686A1 WO 2023108686 A1 WO2023108686 A1 WO 2023108686A1 CN 2021139755 W CN2021139755 W CN 2021139755W WO 2023108686 A1 WO2023108686 A1 WO 2023108686A1
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Prior art keywords
fan
potential
line
display panel
data
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PCT/CN2021/139755
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English (en)
French (fr)
Inventor
陶健
冯帅
李亚锋
彭钟
何剑
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武汉华星光电技术有限公司
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Priority to US17/623,328 priority Critical patent/US20240071331A1/en
Publication of WO2023108686A1 publication Critical patent/WO2023108686A1/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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • 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

Definitions

  • the present application relates to the field of display technology, in particular to a multiplexed display panel, device and driving method.
  • Nano-indium tin oxide can cut off harmful electron radiation, ultraviolet rays and infrared rays due to its good conductivity and transparency. Therefore, ITO is usually sprayed on the display screen as a transparent Conductive film, while reducing electron radiation, ultraviolet rays and infrared rays that are harmful to the human body.
  • an array substrate 10 and a color filter substrate 20 are disposed opposite to each other, liquid crystal molecules 30 are arranged between the array substrate 10 and the color filter substrate 20, and data lines 40 are arranged on the array substrate 10.
  • the electrode 50 is arranged on the side of the array substrate 10 or the color filter substrate 20 facing the liquid crystal molecules 30 (when the common electrode 50 is arranged on the side of the array substrate 10 facing the liquid crystal molecules 30, a flat layer 70 is arranged between the common electrode 50 and the data line 40)
  • the back-plated ITO layer 60 is arranged on the side of the color filter substrate 20 away from the liquid crystal molecules 30, so that a capacitor C1 is formed between the data line 40 and the common electrode 50, and a capacitor C2 is also formed between the common electrode 50 and the back-plated ITO 60, and the common Both the electrode 50 and the back-plated ITO 60 are made of ITO material, but the ITO material has a large resistance, so when the potential of the data line 40 changes, the voltage of the common electrode 50 will fluctuate due to the coupling effect of the capacitor C1, and the voltage of the common electrode 50 will fluctuate due to the coupling effect of the common electrode.
  • the resistance of 50 is so large that it is too late to discharge, so that the fluctuation of the common electrode 50 is relatively large, and then the voltage fluctuation of the common electrode 50 will also cause the potential of the back-plated ITO 60 to fluctuate due to the capacitor C2.
  • FIG. 2 the corresponding variation relationship among the potentials of the data line (data) 40 , the common electrode (com) 50 and the back-plated ITO (ito) 60 is shown.
  • one input channel of the general source driver corresponds to one data line.
  • the data line Since the coupling of data lines of different polarities on the common electrode will cancel each other for a period of time, the data line The total coupling effect on the common electrode is theoretically zero, and the potential of the common electrode will not fluctuate.
  • the presence of mux switching transistors breaks this balance.
  • Each group of mux switching transistors of the multiplexed display panel turns on one of the branches of each Source, and then each Source charges the data lines that need to be charged through this branch, so as to charge all the data lines in time, as shown in the figure 3 and Figure 4 show 6 to 12 (i.e.
  • multiplexing display panels set VGH to 9V, VGL to -7V, data to ⁇ 5V
  • TFT thin film transistor
  • Figure 6 shows the corresponding relationship between the mux signal and the Source signal in Figure 5. It can be seen from Figure 5 and Figure 6 that the root cause of the surface noise is that when the mux is turned on, the corresponding data signal has not risen to the peak value, but is still in the stage of rising to the peak value, so the data signal will fluctuate, thus Bring the fluctuation of the common electrode and back plated ITO.
  • embodiments of the present application provide a multiplexed display panel, device and driving method.
  • the embodiment of the present application provides a multiplexed display panel, including:
  • a plurality of sub-pixels arranged in an array
  • a plurality of gate lines, each gate line is used to scan a row of sub-pixels
  • a plurality of data lines each of which is used to input a data signal to a column of sub-pixels
  • a multiplexer including multiple input channels, each input channel provides data signals to M data lines by connecting M fan-out lines, each fan-out line is provided with a switch, and each input channel corresponds to M The switching switch of one of the fan-out lines is controlled by the same control signal; M is an integer greater than 1;
  • the demultiplexer when each gate line scans a row of sub-pixels, the demultiplexer is used to achieve the amplitude at the rising edge of the same control signal, and each of the input channels passes through one of the plurality of fan-out lines
  • the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is smaller than a preset threshold.
  • the demultiplexer is further configured to adjust the potential of the fan-out line that provides the data signal to the corresponding data line by the potential of the corresponding data line after the falling edge of the same control signal reaches 0 to 0.
  • the demultiplexer is further configured to, after the falling edge of the same control signal reaches 0, provide the corresponding data line with the falling edge of the fan-out line of the data signal after the falling edge of the same control signal The rising edge of the other control signal is adjusted to 0 before reaching the amplitude.
  • the demultiplexer is specifically configured to, before the rising edge of the same control signal reaches the amplitude, adjust the rising edge of the fan-out line that provides the data signal to the corresponding data line in advance from 0 to the The potential of the data line corresponding to the fan-out line.
  • the demultiplexer is specifically configured to reduce the rising edge of the fan-out line that provides the data signal for the corresponding data line from 0 to the fan-out line before the rising edge of the same control signal reaches the amplitude. The duration of the potential of the data line corresponding to the outgoing line.
  • the demultiplexer is specifically configured to prolong the time period for the rising edge of the same control signal to reach the amplitude from 0.
  • the multiplexed display panel includes a source driver module, and the demultiplexer controls the potential and timing.
  • the preset threshold is 0.1V.
  • the duration of the rising edge of the same control signal from 0 to the amplitude is 0.3-0.4 ⁇ s.
  • the embodiment of the present application also provides a driving method for a multiplexed display panel, including:
  • each gate line scans a row of sub-pixels, the amplitude is reached on the rising edge of the same control signal through the demultiplexer, and each input channel provides data to the corresponding data line through one of the plurality of fan-out lines signal, the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is smaller than a preset threshold.
  • the driving method of the multiplexed display panel further includes:
  • the potential of the fan-out line that provides the data signal to the corresponding data line is adjusted to 0 from the potential of the corresponding data line.
  • the driving method of the multiplexed display panel further includes:
  • the falling edge of the same control signal reaches 0 by the demultiplexer, the falling edge of the fanout line that will provide the data signal to the corresponding data line is on the rising edge of another control signal following the same control signal Adjust to 0 before reaching amplitude.
  • the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is less than a preset threshold, specifically includes:
  • the rising edge of the fan-out line that provides the data signal for the corresponding data line is adjusted from 0 to the value of the data line corresponding to the fan-out line in advance. potential.
  • the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is less than a preset threshold, specifically includes:
  • the demultiplexer Before the rising edge of the same control signal reaches the amplitude, the demultiplexer reduces the rising edge of the fan-out line that provides the data signal for the corresponding data line from 0 to the potential of the data line corresponding to the fan-out line. duration.
  • the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is less than a preset threshold, specifically includes:
  • the preset threshold is 0.1V.
  • the duration of the rising edge of the same control signal from 0 to the amplitude is 0.3-0.4 ⁇ s.
  • the switch controlled by the same control signal is turned on while the gate line scans a row of sub-pixels, At this time, the potential of the fan-out line corresponding to the data line connected to the sub-pixel inputting the data signal is adjusted to the same level as possible with the potential of the data line, and the data signal is provided to the corresponding data line through the fan-out line.
  • FIG. 1 is a schematic structural diagram of a display panel in the prior art
  • Fig. 2 is the relationship diagram of the voltage variation of data signal, public signal and back plating ITO of prior art
  • FIG. 3 is a structural schematic diagram of a 6 to 12 multiplexing display panel in the prior art
  • FIG. 5 is a graph showing the variation relationship among the mux signal, the source signal and the surface noise of the multiplexed display panel in the prior art
  • FIG. 6 is a timing diagram of a mux signal and a source signal of a multiplexed display panel in the prior art
  • FIG. 7 is a schematic structural diagram of a 6 to 12 multiplexing display panel provided by an embodiment of the present application.
  • FIG. 8 is a timing diagram of mux signals and source signals of a multiplexed display panel provided by an embodiment of the present application.
  • FIG. 9 is a timing diagram of mux signals and source signals of a 6 to12 multiplexing display panel provided by an embodiment of the present application.
  • Figure 10(a) is the first timing diagram of the mux signal of the multiplexed display panel and the source signal before and after optimization provided by the embodiment of the present application;
  • Figure 10(b) is a graph showing the relationship between the mux signal shown in Figure 10(a), the source signal after different optimizations, and the surface noise;
  • Figure 11(a) is the second timing diagram of the mux signal of the multiplexed display panel and the source signal before and after optimization provided by the embodiment of the present application;
  • Figure 11(b) is a diagram of the relationship between the mux signal before and after optimization, the source signal after different optimizations, and the surface noise shown in Figure 11(a);
  • Fig. 12(a) is a timing diagram of the mux signal and the source signal before and after optimization of the multiplexed display panel provided by the embodiment of the present application;
  • Figure 12(b) is a diagram of the relationship between mux signal, source signal and surface noise after different optimizations shown in Figure 12(a);
  • FIG. 13 is a graph showing the relationship between the mux signal, the source signal and the surface noise of the multiplexed display panel provided by the embodiment of the present application;
  • FIG. 14 is a flowchart of a driving method for a multiplexed display panel provided by an embodiment of the present application.
  • each Source needs to continuously switch between the M fan-out lines used for power supply, the data voltage is provided for the M data lines corresponding to the M fan-out lines in time-sharing, that is, the potential of the data line is at the mux
  • the potential provided by Source so when the display panel displays a solid color picture, at the moment when the mux switch is turned on, if the potential of Source has not risen or dropped to the potential of the corresponding data line during the switching process of the mux switch, then Source There is a potential difference with the corresponding data line, so the Source will pull the corresponding data line at this moment, the Source that provides the positive data signal will positively pull the corresponding data line, and the Source that provides the negative data signal will The corresponding data line produces a negative pull.
  • data signals should be input to D1, D4, D7, and D4, specifically, when mux1 is turned on, S1 inputs data signals to D1, and S6 inputs data signals to D10; When mux2 is turned on, S2 inputs data signals to D4, and S3 inputs data signals to D7.
  • Vg of the mux switch is 9V
  • S1 is 4V
  • D1 is 5V
  • S2 is -4V
  • D10 is -5V
  • the pulling of the common electrode is large, so that the pulling of the common electrode by D1 and D10 cannot cancel each other at this time, so the potential of the common electrode fluctuates, and then the potential of the back-plated ITO fluctuates, so that the display panel is turned on when the mux1 switch is turned on. Instantly produces loud surface noise.
  • the pull of D4 and D7 to the common electrode is asymmetrical, and the pull of D4 to the common electrode is larger than that of D7 to the common electrode, so that the pull of D4 and D7 to the common electrode cannot cancel each other out at this time. Therefore, the potential of the common electrode fluctuates, which in turn causes the potential of the back-plated ITO to fluctuate, causing the display panel to generate relatively large surface noise at the moment when the mux2 switch is turned on.
  • an embodiment of the present application provides a multiplexed display panel, as shown in FIG. 7 , still taking a 6 to 12 multiplexed display panel as an example, the multiplexed display panel includes:
  • a plurality of sub-pixels arranged in an array
  • each gate line is used to scan a row of sub-pixels
  • a plurality of data lines (data lines), each of which is used to input a data signal to a column of sub-pixels;
  • the demultiplexer 100 includes a plurality of input channels (Source, such as S1, S2, S3, S4, S5, S6, wherein S1, S3, S5 are positive polarity, S2, S4, S6 are negative polarity), each The input channel provides data signals to M data lines respectively by connecting M fanout lines (fanout lines). Each fanout line is equipped with a switch, and the switch of one of the M fanout lines corresponding to each input channel is controlled by the same
  • the control signal mux controls on-off; M is an integer greater than 1;
  • the demultiplexer when each gate line scans a row of sub-pixels, the demultiplexer is used to achieve the amplitude at the rising edge of the same control signal mux, and each of the input channels source passes through the plurality of fans
  • the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line data corresponding to the fan-out line is smaller than a preset threshold.
  • the value of the preset threshold can be 0.1V, that is, when a control signal mux is turned on, the potential of each fan-out line controlled by the control signal mux rises to the potential of data corresponding to the fan-out line The difference is less than 0.1V, so that the fan-out line reaches the same potential as the corresponding data line at the moment when the switch is turned on.
  • the multiplexed display panel in the embodiment of the present application takes a display panel with the same color of sub-pixels in the same column as an example, and generally That is, each row of sub-pixels is periodically arranged in different colors, such as R (red), G (green), B (blue), and each group of R (red), G (green), B (blue) color) sub-pixels constitute a pixel.
  • the source of the display panel is driven by column inversion, that is, the polarities of adjacent data lines are reversed.
  • the demultiplexer When each gate line scans a row of sub-pixels, the demultiplexer turns on the switch controlled by the same control signal (such as mux1 or mux2). At this time, according to the solid-color picture displayed, the input channel will pass the fan-out line for this The data lines connected to the sub-pixels in the row of sub-pixels that need to input data signals input data signals.
  • the same control signal such as mux1 or mux2
  • the difference between the potential of the fan-out line and the potential of the corresponding data line is less than the preset threshold (the smaller the absolute value of the preset threshold, the better), so that the potential difference between the fan-out line and the data line is very small, and the sudden change in the potential of the data line is small, so that the data line will not cause the common electrode to generate Large fluctuations, so that the common electrode will not cause large fluctuations in the back-plated ITO, and avoid large surface noises generated at the moment when the switch is turned on on the display panel.
  • the potential of the fan-out line is adjusted to be equal to the potential of the corresponding data line, as shown in Figure 8, so that the moment the switch is turned on, the potential of the fan-out line has been adjusted to the potential of the corresponding data line, that is There is no potential difference between the fan-out line and the corresponding data line, which minimizes the surface noise generated by the display panel when the switch is turned on.
  • the potential of the data line at this time is the potential applied when the data signal is input to the sub-pixels in the same column, that is, the uniform potential value corresponding to the gray scale required by the solid color screen, and the potential of the positive data line is positive unity.
  • Potential value, the potential of the negative data line is negative uniform potential value.
  • the source in the drawings of the embodiments of the present application shows the absolute value of the potential of the fan-out line, that is, when the data line corresponding to the fan-out line is at a positive potential and the mux control switch is turned on, the fan-out line
  • the potential of the outgoing line rises from 0 to the potential of the corresponding data line; when the data line corresponding to the fan-out line has a negative potential, the potential of the fan-out line decreases from 0 to the potential of the corresponding data line.
  • the switch controlled by the same control signal mux is turned on while the gate line scans a row of sub-pixels, and at this time, the data connected to the sub-pixels of the input data signal
  • the potential of the fan-out line corresponding to the line data is adjusted to the same level as possible with the potential of the data line, and the data signal is provided to the corresponding data line through the fan-out line.
  • the switching switch is a thin film transistor
  • the gate of the thin film transistor is connected to the control signal
  • the source of the thin film transistor is connected to the input channel
  • the drain of the thin film transistor is connected to the data line.
  • the multiplexing display panel includes a source driver module (not shown in the figure), and the demultiplexer controls the potential and timing of the input channel to output the data signal to the data line through the fan-out line through the source driver module, that is,
  • the source driving module is used to provide the source signal of the fan-out line, so as to input the data signal to the corresponding data line through the fan-out line, so as to charge the sub-pixels to be charged through the data line.
  • the demultiplexer reaches 0 on the falling edge of the same control signal (such as mux2)
  • the potential of the fan-out line that will provide the data signal to the corresponding data line data is adjusted by the potential of the corresponding data line data to 0, so that when the switch of the control signal (mux2) is turned off, there is no potential difference between the fan-out line and the corresponding data line, so the potential of the data line will not change suddenly at this moment, so that the common electrode and the back plating ITO does not fluctuate, and the surface noise generated by the display panel at the moment when the toggle switch is turned off is also small.
  • the fan-out line connected to the toggle switch affects the data line connected to the toggle switch controlled by another control signal (mux1), resulting in more unnecessary surface noise when the two control signals switch (mux2 switches to mux1), In order to further reduce the surface noise of the multiplexed display panel. That is, for example, as shown by the dotted line in Figure 8, before mux2 is switched to mux1, the potential of Source corresponding to mux2 is adjusted to 0 before the rising edge of mux1 starts, so that when mux1 is turned on, only D1 and D10 appear Fluctuations, D2 and D5 will not fluctuate.
  • the potential of the source corresponding to mux1 can be adjusted to 0 before the rising edge of mux2 starts, so that when mux2 is turned on, only D4 and D7 fluctuate, and D3 and D12 will not appear fluctuate, so that the potentials of the mux signal and the data line signal form the timing diagram shown in FIG. 9 .
  • the purpose of this application is to minimize the potential of the data line data connected to the sub-pixel that needs to input the data signal and the potential of the fan-out line that inputs the data signal to the data line (by the channel) when the switch is turned on. source provided).
  • the embodiment of the present application can adopt the following three ways to achieve this effect, and the following uses the change of mux2 as an example.
  • the demultiplexer is specifically used to adjust the rising edge of the fan-out line that provides the data signal for the corresponding data line data in advance from 0 to the value corresponding to the fan-out line before the rising edge of the same control signal mux reaches the amplitude.
  • the potential of the data line data That is, move the source signal of the fan-out line to the left by a certain distance, and adjust the source signal of the fan-out line from that shown in Figure 4 to that shown in Figure 10(a), so that the potential of the fan-out line has basically reached the corresponding level before the switch is turned on The potential of the data line.
  • noise1 corresponds to curve 1
  • noise2 corresponds to curve 2
  • noise3 corresponds to curve 3.
  • the demultiplexer is specifically used to reduce the rising edge of the fan-out line that provides the data signal for the corresponding data line data from 0 to the data line corresponding to the fan-out line before the rising edge of the same control signal mux reaches the amplitude
  • the duration of the potential of data is reduced from 0.8-1 ⁇ s to 0.6-0.8 ⁇ s, that is, to reduce the time-consuming adjustment of the potential of the fan-out line that provides the data signal for the corresponding data line from 0 to the potential of the corresponding data line, that is, to shorten
  • the demultiplexer is specifically used to prolong the duration of the rising edge of the same control signal from 0 to the amplitude, that is, prolonging the time for switching on the switching switch, for example, extending from 0.1-0.2 ⁇ s to 0.3-0.4 ⁇ s, that is As shown in Figure 12 (a), increase the rise time of the control signal mux that controls the switch, by increasing the rise time of the control signal mux corresponding to the switch (equivalent to letting the control signal mux wait for the Source signal to rise), to reduce the switching time.
  • the embodiment of the present application adjusts the mux signal or the source signal through at least one of the above three methods, so that at the moment when the switch is turned on, the data line connected to the sub-pixel that needs to input the data signal is reduced as much as possible.
  • the difference between the potential and the potential of the fan-out line that inputs the data signal to the data line to reduce surface noise.
  • Figure 13 shows the mux1 signal, fan-out line signal (or Source signal) generated by the display panel and the before and after improvement after the mux signal or source signal is adjusted by at least one of the above three methods.
  • the corresponding change relationship between the noise is not limited to:
  • the embodiment of the present application further provides a driving method for a multiplexed display panel, including the following steps:
  • each gate line scans a row of sub-pixels, the amplitude is reached on the rising edge of the same control signal through the demultiplexer, and each of the input channels passes through one of the plurality of fan-out lines for When the corresponding data line provides the data signal, the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line is smaller than a preset threshold.
  • the switching switch controlled by the same control signal is turned on while the gate line is scanning a row of sub-pixels. Adjust the potential of the fan-out line corresponding to the data line connected to the sub-pixel that needs to input the data signal to the same level as possible with the potential of the data line, and provide the data signal to the corresponding data line through the fan-out line.
  • the driving method of the multiplexing display panel further includes: after the falling edge of the same control signal reaches 0 through the demultiplexer, a fan-out line of the data signal will be provided for the corresponding data line The potential of is adjusted to 0 by the potential of the corresponding data line.
  • the driving method of the multiplexing display panel further includes: after the falling edge of the same control signal reaches 0 through the demultiplexer, a fan-out line of the data signal will be provided to the corresponding data line The falling edge of is adjusted to 0 before the rising edge of another control signal following the same control signal reaches the amplitude.
  • the reducing the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line specifically includes: through the demultiplexer in the Before the rising edge of the same control signal reaches the amplitude, the rising edge of the fan-out line that provides the data signal to the corresponding data line is adjusted from 0 to the potential of the data line corresponding to the fan-out line in advance.
  • the reducing the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line specifically includes: using the demultiplexer in the Before the rising edge of the same control signal reaches the amplitude, reduce the time for the rising edge of the fan-out line that provides the data signal for the corresponding data line to reach the potential of the data line corresponding to the fan-out line from 0.
  • the reducing the difference between the potential reached by the rising edge of the fan-out line and the potential of the data line corresponding to the fan-out line specifically includes: extending the rising edge of the same control signal by 0 The time to reach the magnitude.
  • the heavy-duty screen and the solid-color screen are commonly used detection screens before the display panel leaves the factory.
  • the display panel displays a non-solid-color screen
  • the data potentials of the sub-pixels in the previous row and the sub-pixels in the next row in the same column are different. , so there is a potential difference between the data in the previous line and the data in the next line, which makes the source of the next line input the data in the next line, it will definitely pull the data in the previous line, so this solution is not suitable for reducing the non-solid color screen noise.

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Abstract

一种多路复用显示面板、装置及驱动方法，在切换开关开启的瞬间，将向子像素输入数据信号的数据线对应的扇出线的电位调节至与数据线的电位尽量相同的水平，使扇出线与对应的数据线之间的电位差较小，从而减少了此刻的瞬时电流，不会使数据线、公共电极和背镀ITO产生较大波动，进而减少了显示面板的表面噪音。

Description

多路复用显示面板、装置及驱动方法 技术领域
本申请涉及显示技术领域，尤其涉及一种多路复用显示面板、装置及驱动方法。
 背景技术
纳米铟锡金属氧化物（ITO，InDium Tin OxiDeS）由于具有很好的导电性和透明性，可以切断对人体有害的电子辐射、紫外线和红外线，因此，通常将ITO喷涂在显示屏上用作透明导电薄膜，同时减少对人体有害的电子辐射、紫外线和红外线。
如图1所示，在液晶显示面板中，阵列基板10和彩膜基板20相对设置，阵列基板10和彩膜基板20之间设有液晶分子30，数据线40设置于阵列基板10上，公共电极50设置于阵列基板10或彩膜基板20面向液晶分子30的一面（公共电极50设置于阵列基板10面向液晶分子30的一面时，公共电极50和数据线40之间设置有平坦层70），背镀ITO层60设置于彩膜基板20远离液晶分子30的一面，使得数据线40和公共电极50之间形成电容C1，公共电极50和背镀ITO 60之间也形成电容C2，而公共电极50和背镀ITO 60均采用ITO材料制作，但是ITO材料电阻很大，因此在数据线40的电位变化时，会由于电容C1的耦合作用使得公共电极50的电压产生波动，而由于公共电极50的电阻很大因此来不及放电，使得公共电极50的波动较大，然后公共电极50的电压波动同样会由于电容C2使得背镀ITO 60的电位产生波动。如图2所示为数据线（data）40、公共电极（com）50和背镀ITO（ito）60的电位之间对应的变化关系。
在普通的显示面板中，一般源极驱动器的一个输入通道对应一条数据线，显示纯色画面时，由于不同极性的数据线在公共电极上的耦合在一段时间内会相互抵消，因此数据线在公共电极上的总耦合效应理论上为零，公共电极的电位不会产生波动。但是，对于多路复用显示面板来说，mux开关晶体管的存在打破了这一平衡。多路复用显示面板的每组mux开关晶体管开启各个Source的其中一条支路，然后各个Source通过这条支路对需要充电的数据线进行充电，从而分时对所有数据线进行充电，如图3和图4所示的6 to 12（即1 to 2）多路复用显示面板（设VGH为9V，VGL为-7V，data为±5V），根据薄膜晶体管（TFT）的转移特性曲线可知，TFT导通时，若源极和漏极的电位不同，则源漏极之间会形成瞬时电流，且栅源极电压差Vgs与源漏极电流IDS呈正相关，由于mux开关晶体管将Source引入负电位（S为负）时的Vgs大于引入正电位（S为正）时的Vgs，若mux开关开启的瞬间，Source和data之间存在电位差，则引入负电位时的IDS大于引入正电位时的IDS，从而导致不同极性的数据线在公共电极上的耦合在一段时间内不能相互抵消，公共电极在mux开关晶体管开启时会产生较大的波动，从而使得背镀ITO产生较大波动，由此导致产生较大的表面噪音，如图5所示由示波器采集的mux1打开时，显示面板产生的mux信号、扇出线信号（或Source信号）和表面噪音noise之间对应的变化关系，在mux1打开时，产生较大的表面噪音，图6为将图5中的mux信号和Source信号筛选出的对应关系。由图5和图6可以看出，造成表面噪音的根本原因在于mux打开的时，对应的data信号与未上升到峰值，还处于向峰值上升的变化阶段，因此data信号会有波动，由此带来公共电极和背镀ITO的波动。
因此，目前亟需提出一种新的多路复用显示面板、装置及驱动方法，用于改善多路复用显示面板显示纯色画面时，在mux开关晶体管切换时会产生较大表面噪音的技术问题。
 技术问题
多路复用显示面板显示纯色画面时，在mux开关晶体管切换时会产生较大表面噪音。
 技术解决方案
为了解决上述问题，本申请实施例提供一种多路复用显示面板、装置及驱动方法。
第一方面，本申请实施例提供一种多路复用显示面板，包括：
多个呈阵列排布的子像素；
多条栅极线，每条栅极线用于对一行子像素进行扫描；
多条数据线，每条数据线用于向一列子像素输入数据信号；
多路分配器，包括多个输入通道，每个输入通道通过连接M条扇出线分别向M条数据线提供数据信号，每条扇出线上设有切换开关，且每个输入通道对应的M条扇出线之一的切换开关由同一控制信号控制通断；M大于1的整数；
其中，每条栅极线扫描一行子像素的同时，所述多路分配器用于在所述同一控制信号的上升沿达到幅值，并由每个所述输入通道通过所述多条扇出线之一为对应的数据线提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值。
在一些实施例中，所述多路分配器还用于在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的电位由对应的数据线的电位调节至0。
在一些实施例中，所述多路分配器还用于在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的下降沿在所述同一控制信号后续的另一控制信号的上升沿达到幅值之前调节至0。
在一些实施例中，所述多路分配器具体用于在同一控制信号的上升沿达到幅值之前，提前将为对应的数据线提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线的电位。
在一些实施例中，所述多路分配器具体用于在所述同一控制信号的上升沿达到幅值之前，减少为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长。
在一些实施例中，所述多路分配器具体用于延长同一控制信号的上升沿由0达到幅值的时长。
在一些实施例中，所述多路复用显示面板包括源极驱动模块，所述多路分配器通过所述源极驱动模块控制所述输入通道通过扇出线向数据线输出数据信号的电位和时序。
在一些实施例中，所述预设阈值为0.1V。
在一些实施例中，为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长为0.6-0.8μs。
在一些实施例中，所述同一控制信号的上升沿由0达到幅值的时长为0.3-0.4μs。
另一方面，本申请实施例还提供一种多路复用显示面板的驱动方法，包括：
通过多条栅极线逐行扫描子像素；
每条栅极线扫描一行子像素的同时，通过多路分配器在同一控制信号的上升沿达到幅值，并由每个输入通道通过所述多条扇出线之一为对应的数据线提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值。
在一些实施例中，该多路复用显示面板的驱动方法还包括：
通过所述多路分配器使所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的电位由对应的数据线的电位调节至0。
在一些实施例中，该多路复用显示面板的驱动方法还包括：
通过所述多路分配器在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的下降沿在所述同一控制信号后续的另一控制信号的上升沿达到幅值之前调节至0。
在一些实施例中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
通过所述多路分配器在由同一控制信号的上升沿达到幅值之前，提前将为对应的数据线提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线的电位。
在一些实施例中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
通过所述多路分配器在所述同一控制信号的上升沿达到幅值之前，减少为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长。
在一些实施例中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
延长同一控制信号的上升沿由0达到幅值的时长。
在一些实施例中，所述预设阈值为0.1V。
在一些实施例中，为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长为0.6-0.8μs。
在一些实施例中，所述同一控制信号的上升沿由0达到幅值的时长为0.3-0.4μs。
 有益效果
本申请实施例提供的多路复用显示面板、装置及驱动方法，在多路复用显示面板显示纯色画面时，在栅极线扫描一行子像素的同时将由同一控制信号控制的切换开关开启，此时将输入数据信号的子像素连接的数据线对应的扇出线的电位调节至与该数据线的电位尽量相同的水平，并通过扇出线向对应的数据线提供数据信号。由于在切换开关开启的瞬间，扇出线与对应的数据线之间的电位差较小，因此极大地减少了此刻的瞬时电流，不会使数据线的电位产生较大的突变，从而使公共电极产生较大波动，进而极大地减少了显示面板在切换开关开启的瞬间产生的表面噪音。
 附图说明
图1为现有技术的显示面板的结构示意图；
图2为现有技术的数据信号、公共信号和背镀ITO的电压变化关系图；
图3为现有技术的6 to12多路复用显示面板的结构示意图；
图4为现有技术的6 to12多路复用显示面板的mux信号和数据信号的时序图；
图5为现有技术的多路复用显示面板的mux信号、源信号和表面噪音的变化关系图；
图6为现有技术的多路复用显示面板的mux信号和源信号的时序图；
图7为本申请实施例提供的6 to12多路复用显示面板的结构示意图；
图8为本申请实施例提供的多路复用显示面板的mux信号和源信号的时序图；
图9为本申请实施例提供的6 to12多路复用显示面板的mux信号和源信号的时序图；
图10（a）为本申请实施例提供的多路复用显示面板的mux信号和优化前后源信号的第一种时序图；
图10（b）为图10（a）所示的mux信号、不同优化后源信号和表面噪音的电压变化关系图；
图11（a）为本申请实施例提供的多路复用显示面板的mux信号和优化前后源信号的第二种时序图；
图11（b）为图11（a）所示的优化前后mux信号、不同优化后源信号和表面噪音的变化关系图；
图12（a）为本申请实施例提供的多路复用显示面板的优化前后mux信号和源信号的时序图；
图12（b）为图12（a）所示的不同优化后mux信号、源信号和表面噪音的变化关系图；
图13为本申请实施例提供的多路复用显示面板的mux信号、源信号和表面噪音的变化关系图；
图14为本申请实施例提供的多路复用显示面板的驱动方法的流程图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
需要提前说明的是，本申请实施例各附图中的纵坐标均表示时间，横坐标均表示电位。
由于每个Source需要在其用于供电的M条扇出线之间不停地切换，从而分时为M条扇出线对应的M条data线提供数据电压，即，data线的电位即为在mux打开的瞬间，Source所提供的电位，因此显示面板显示纯色画面时，在mux开关开启的瞬间，如果Source的电位在mux开关切换的过程中还没有上升或下降到对应data线的电位，则Source与对应的data线之间存在电位差，因此Source在该瞬间会拉动对应的data线，提供正极性数据信号的Source会对对应的data线产生正向拉动，提供负极性数据信号的Source会对对应的data线产生负向拉动。
如图3和图4所示，例如当显示面板显示红色画面时，应当向D1、D4、D7和D4输入数据信号，具体地，mux1开启时，S1向D1，S6向D10输入数据信号；在mux2开启时，S2向D4，S3向D7输入数据信号。
当mux1开启时，S1向D1产生正向拉动，S6向D10产生负向拉动，但是由于S6对D10产生的负向拉动大于S1对D1产生的正向拉动，也就是说，虽然本身D1和D10对公共电极的拉动互相能有一定的抵消作用，但是由于D10对公共电极的拉动与D1对公共电极的拉动不对称，使得此时D1和D10对公共电极的拉动不能相互抵消。假设mux开关的栅极信号Vg为9V，S1为4V，D1为5V，S2为-4V，D10为-5V，假设D1和D10连接的扇出线的切换开关TFT1和TFT10（图中未示出）均为N型薄膜晶体管，则根据N型薄膜晶体管的源极一般接入低于漏极的电位（利于N型薄膜晶体管开启），TFT1的Vgs=Vg-s1=9-4=5V，TFT10的Vgs=Vg-D10=9-（-5）=14V，可以看出TFT10的Vgs比TFT1的Vgs大的多，因此D10对公共电极的拉动与D1对公共电极的拉动不对称，D10比D1对公共电极的拉动大，使得此时D1和D10对公共电极的拉动不能相互抵消，因此导致公共电极的电位产生波动，进而使背镀ITO的电位产生波动，以致于使显示面板在mux1开关开启的瞬间产生较大的表面噪音。
同理，当mux2开启时，D4和D7对公共电极的拉动也不对称，D4对公共电极的拉动比D7对公共电极的拉动大，使得此时D4和D7对公共电极的拉动不能相互抵消，因此导致公共电极的电位产生波动，进而使背镀ITO的电位产生波动，导致显示面板在mux2开关开启的瞬间产生较大的表面噪音。
有鉴于此，本申请实施例提供一种多路复用显示面板，如图7所示，仍然以6 to 12多路复用显示面板为例，该多路复用显示面板包括：
多个呈阵列排布的子像素；
多条栅极线（Scan线），每条栅极线用于对一行子像素进行扫描；
多条数据线（data线），每条数据线用于向一列子像素输入数据信号；
多路分配器100，包括多个输入通道（Source，例如S1，S2，S3，S4，S5，S6，其中，S1、S3、S5为正极性，S2、S4、S6为负极性），每个输入通道通过连接M条扇出线（fanout线）分别向M条数据线提供数据信号，每条扇出线上设有切换开关，且每个输入通道对应的M条扇出线之一的切换开关由同一控制信号mux控制通断；M大于1的整数；
其中，每条栅极线扫描一行子像素的同时，所述多路分配器用于在所述同一控制信号mux的上升沿达到幅值，并由每个所述输入通道source通过所述多条扇出线之一为对应的数据线data提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线data的电位之间的差值小于预设阈值。
需要说明的是，预设阈值的取值可以为0.1V，即某个控制信号mux打开时，由该控制信号mux控制的每条扇出线的电位上升至与该条扇出线对应的data的电位相差小于0.1V的位置，由此使得在切换开关开启的瞬间，扇出线达到与对应的数据线尽量相同的电位。
还需要说明的是，为了便于说明多路复用显示面板显示纯色画面的驱动情况，本申请实施例提供的多路复用显示面板以同列子像素为相同颜色的显示面板为例，且一般来说，每行子像素按不同颜色呈周期排列，如按照R（红色）、G（绿色）、B（蓝色）呈周期排列，且每组R（红色）、G（绿色）、B（蓝色）子像素构成一个像素。该显示面板的源极采用列反转驱动，即相邻数据线的极性相反。
在每条栅极线扫描一行子像素的同时，多路分配器开启由同一控制信号（如mux1或mux2）控制的切换开关，这时根据需要显示的纯色画面，输入通道会通过扇出线为这行子像素中需要输入数据信号的子像素连接的数据线输入数据信号，需要注意的是，切换开关开启的瞬间，使扇出线的电位与对应的数据线的电位之间的差值小于预设阈值（预设阈值的绝对值越小越好），由此使得扇出线与数据线之间的电位差很小，数据线的电位产生的突变较小，从而使数据线不会使公共电极产生较大波动，进而使公共电极不会使背镀ITO产生较大波动，避免了显示面板在切换开关开启的瞬间产生较大的表面噪音。在理想情况下，将扇出线的电位调节至与对应的数据线的电位相等，如图8所示，使得切换开关开启的瞬间，扇出线的电位已经被调节为对应的数据线的电位，即扇出线与对应的数据线之间不存在电位差，最大化地减小了显示面板在切换开关开启的瞬间产生的表面噪音。可以理解的是，此时数据线的电位为同一列上一行子像素输入数据信号时所施加的电位，即纯色画面所需灰阶对应的统一电位值，正极性的数据线的电位为正统一电位值，负极性的数据线的电位为负统一电位值。
需要说明的是，本申请实施例的各附图中的source示出的是扇出线的电位的绝对值，即，当扇出线对应的数据线为正电位时，mux控制切换开关打开时，扇出线的电位由0上升至对应的数据线的电位；当扇出线对应的数据线为负电位时，扇出线的电位由0下降至对应的数据线的电位。
本申请实施例提供的多路复用显示面板显示纯色画面时，在栅极线扫描一行子像素的同时将由同一控制信号mux控制的切换开关开启，此时将输入数据信号的子像素连接的数据线data对应的扇出线的电位调节至与该数据线的电位尽量相同的水平，并通过扇出线向对应的数据线提供数据信号。由于在切换开关开启的瞬间，扇出线与对应的数据线之间的电位差较小，因此极大地减少了此刻的瞬时电流，不会使数据线的电位产生较大的突变，从而使公共电极和背镀ITO产生较大波动，进而极大地减少了显示面板在切换开关开启的瞬间产生的表面噪音。
其中，切换开关为薄膜晶体管，薄膜晶体管的栅极连接控制信号，薄膜晶体管的源极连接输入通道，薄膜晶体管的漏极连接数据线。
其中，该多路复用显示面板包括源极驱动模块（图中未示出），多路分配器通过源极驱动模块控制输入通道通过扇出线向数据线输出数据信号的电位和时序，即，源极驱动模块用于提供扇出线的源信号，以通过扇出线向对应的数据线输入数据信号，从而通过数据线为需要充电的子像素充电。
请继续参阅图8，多路分配器在在同一控制信号（例如mux2）的下降沿达到0之后，将为对应的数据线data提供数据信号的扇出线的电位由对应的数据线data的电位调节至0，使得该控制信号（mux2）切换开关关闭的瞬间，扇出线与对应的数据线之间也不存在电位差，因此此刻数据线的电位也不会产生突变，从而使公共电极和背镀ITO也不产生波动，显示面板在切换开关关闭的瞬间产生的表面噪音也较小。
需要注意的是，图3中，当一个控制信号（如mux2）切换到另一个控制信号（mux1）时，存在mux2关闭而mux1刚刚开启的过渡阶段，此时S2和S3的电位需要分别由对应的数据线的电位调节至0，但是在mux1瞬间开启的时刻，如果S2和S3的电位还未调节至0（如图8（a）中现有的Source波形），则会导致D2和D5出现波动（D2由S2造成，D5由S3造成），从而出现在mux1开启的瞬间，不仅D1和D10出现波动，D2和D5也出现波动的现象。同理，当mux1切换到mux2时，存在mux1关闭而mux2刚刚开启的过渡阶段，此时S1和S6的电位分别需要由对应的数据线的电位调节至0，但是在mux2瞬间开启的时刻，如果S1和S6的电位还未调节至0，则会导致D3和D12出现波动（D3由S1造成，D12由S6造成），从而出现在mux2开启的瞬间，不仅D4和D7出现波动，D3和D12也出现波动的现象。
基于此，如图8所示，本申请实施例在同一控制信号（例如mux2）的下降沿达到0之后，为对应的数据线data提供数据信号的扇出线的下降沿在该同一控制信号（mux2）后续的另一控制信号（例如mux1）的上升沿达到幅值之前调节至0，以防止在另一个控制信号（mux1）控制的切换开关开启时，同一输入通道的当前控制信号（mux2）控制的切换开关连接的扇出线影响另一个控制信号（mux1）控制的切换开关连接的数据线，从而导致在两个控制信号切换（mux2切换至mux1）时，带来更多不必要的表面噪音，以进一步减小该多路复用显示面板的表面噪音。也即，例如图8的虚线所示，在mux2切换到mux1之前，就将mux2对应的Source的电位在mux1的上升沿开始之前调节到0，这样在mux1开启的时候，仅有D1和D10出现波动，D2和D5不会出现波动。同理，可以在mux1切换到mux2之前，就将mux1对应的source的电位在mux2的上升沿开始之前调节到0，这样在mux2开启时，仅有D4和D7出现波动，D3和D12不会出现波动，从而使mux信号和数据线信号的电位形成图9所示的时序图。
需要强调的是，本申请的宗旨在于在切换开关开启的瞬间，尽量减小需要输入数据信号的子像素连接的数据线data的电位与向该数据线输入数据信号的扇出线的电位（由通道source提供）之间的差值。具体而言，本申请实施例可以采用以下三种方式实现该效果，以下均以mux2的变化为例。
该多路分配器具体用于在由同一控制信号mux的上升沿达到幅值之前，提前将为对应的数据线data提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线data的电位。即，将扇出线的源信号左移一段距离，将扇出线的源信号由图4中的调节为图10（a）中所示，使得切换开关开启之前，扇出线的电位就已经基本达到对应的数据线的电位。如图10（b）所示，由曲线1→曲线2→曲线3逐步调节可以看出，左移的距离越大，则切换开关切换开关开启的瞬间，扇出线与对应的数据线之间的电位差越小，造成的表面噪音就越小，其中，noise1对应曲线1，noise2对应曲线2，noise3对应曲线3。
或者，该多路分配器具体用于在同一控制信号mux的上升沿达到幅值之前，减少为对应的数据线data提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线data的电位的时长，例如由0.8-1μs减少为0.6-0.8μs，即，减少为对应的数据线提供数据信号的扇出线的电位由0调节至对应的数据线的电位的耗时，即缩短扇出线的电位由0调节（上升或下降）至对应的数据线的电位的时间，如图11（a）所示，以将扇出线的电位由0上升至对应的数据线的电位为例，扇出线在对应的切换开关打开之前上升得越快，则在切换开关打开时扇出线与对应的数据线的电位差就越小。如图11（b）所示，由曲线4→曲线5→曲线6逐步调节可以看出，扇出线的电位上升得越快，则在切换开关开启的瞬间，扇出线与对应的数据线之间的电位差越小，造成的表面噪音就越小，其中，noise4对应曲线4，nois5对应曲线5，noise6对应曲线6。
又或者，该多路分配器具体用于延长同一控制信号的上升沿由0达到幅值的时长，也就是延长切换开关开启的耗时，例如由0.1-0.2μs延长为0.3-0.4μs，即如图12（a）中所示增加控制切换开关的控制信号mux的上升时间，通过增加切换开关对应的控制信号mux的上升时间（相当于让控制信号mux等待Source信号上升），以减少在切换开关打开时扇出线和对应的数据线之间的电位差。如图12（b）所示，由曲线7→曲线8→曲线9逐步调节可以看出，切换开关开启得越慢，则在切换开关开启的瞬间，扇出线与对应的数据线之间的电位差越小，造成的表面噪音就越小，其中，noise7对应曲线7，noise8对应曲线8，noise9对应曲线9。
也就是说，本申请实施例通过以上三种方式中的至少一种对mux信号或source信号进行调节，从而在切换开关开启的瞬间，尽量减小需要输入数据信号的子像素连接的数据线的电位与向该数据线输入数据信号的扇出线的电位之间的差值，以减小表面噪音。
图13所示为经过上述三种方式中的至少一种对mux信号或source信号调节之后，由示波器采集的mux1打开时，显示面板产生的mux1信号、扇出线信号（或Source信号）和改善前后的noise之间对应的变化关系。
值得注意的是，图5或图13中，在切换开关开启的瞬间，即使在理想情况下，扇出线与对应的数据线之间不存在电位差，但是在扇出线和对应的数据线导通的瞬间，扇出线和对应的数据线之间仍然会有一定的导通电流，因此数据线仍然会有轻微的波动，从而导致公共电极和背镀ITO伴随有轻微的波动，进而形成轻微的表面噪音。同理，在切换开关关闭的瞬间，即使扇出线与对应的数据线之间不存在电位差，但是在断开的瞬间，扇出线和对应的数据线之间仍然会有一定的关态电流，因此也会形成轻微的表面噪音。
基于上述实施例，如图14所示，本申请实施例还提供一种多路复用显示面板的驱动方法，包括以下步骤：
S1、通过多条栅极线逐行扫描子像素；
S2、每条栅极线扫描一行子像素的同时，通过多路分配器在所述同一控制信号的上升沿达到幅值，并由每个所述输入通道通过所述多条扇出线之一为对应的数据线提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值。
本申请实施例提供的多路复用显示面板的驱动方法，在多路复用显示面板显示纯色画面时，在栅极线扫描一行子像素的同时将由同一控制信号控制的切换开关开启，此时将需要输入数据信号的子像素连接的数据线对应的扇出线的电位调节至与该数据线的电位尽量相同的水平，并通过扇出线向对应的数据线提供数据信号。由于在切换开关开启的瞬间，扇出线与对应的数据线之间的电位差较小，因此极大地减少了此刻的瞬时电流，不会使数据线的电位产生较大的突变，从而使公共电极和背镀ITO产生较大波动，进而极大地减少了显示面板在切换开关开启的瞬间产生的表面噪音。
在一些实施例中，该多路复用显示面板的驱动方法，还包括：通过多路分配器使所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的电位由对应的数据线的电位调节至0。
在一些实施例中，该多路复用显示面板的驱动方法，还包括：通过多路分配器在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的下降沿在所述同一控制信号后续的另一控制信号的上升沿达到幅值之前调节至0。
在一些实施例中，所述减小该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值，具体包括：通过所述多路分配器在由同一控制信号的上升沿达到幅值之前，提前将为对应的数据线提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线的电位。
在一些实施例中，所述减小该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值，具体包括：通过所述多路分配器在所述同一控制信号的上升沿达到幅值之前，减少为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长。
在一些实施例中，所述减小该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值，具体包括：延长同一控制信号的上升沿由0达到幅值的时长。
值得一提的是，重载画面和纯色画面是显示面板出厂前常用的检测画面，由于显示面板显示非纯色画面时，位于同一列的前一行子像素的data和后一行子像素的data电位不同，因此前一行data和后一行的data本身就存在电位差，这使得后一行的source输入后一行的data时，必定会对前一行的data产生拉动，故本方案不适用于减小非纯色画面的噪音。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (20)

  1. 一种多路复用显示面板，其包括：
    多个呈阵列排布的子像素；
    多条栅极线，用于对多行子像素进行扫描；
    多条数据线，用于向多列子像素输入数据信号；
    多路分配器，包括多个输入通道，每个所述输入通道通过连接多条扇出线分别向多条数据线提供数据信号，其中，每条扇出线上设有切换开关，且每个所述输入通道对应的多条扇出线之一的切换开关由同一控制信号控制通断；
    其中，每条栅极线扫描一行子像素的同时，所述多路分配器用于在所述同一控制信号的上升沿达到幅值，并由每个所述输入通道通过所述多条扇出线之一为对应的数据线提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值。
  2. 如权利要求1所述的多路复用显示面板，其中，所述多路分配器还用于在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的电位由对应的数据线的电位调节至0。
  3. 如权利要求1所述的多路复用显示面板，其中，所述多路分配器还用于在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的下降沿在所述同一控制信号后续的另一控制信号的上升沿达到幅值之前调节至0。
  4. 如权利要求1所述的多路复用显示面板，其中，所述多路分配器具体用于在由同一控制信号的上升沿达到幅值之前，提前将为对应的数据线提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线的电位。
  5. 如权利要求1所述的多路复用显示面板，其中，所述多路分配器具体用于在所述同一控制信号的上升沿达到幅值之前，减少为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长。
  6. 如权利要求1所述的多路复用显示面板，其中，所述多路分配器具体用于延长同一控制信号的上升沿由0达到幅值的时长。
  7. 如权利要求1所述的多路复用显示面板，其中，所述多路复用显示面板包括源极驱动模块，所述多路分配器通过所述源极驱动模块控制所述输入通道通过扇出线向数据线输出数据信号的电位和时序。
  8. 如权利要求1所述的多路复用显示面板，其中，所述预设阈值为0.1V。
  9. 如权利要求5所述的多路复用显示面板，其中，为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长为0.6-0.8μs。
  10. 如权利要求6所述的多路复用显示面板，其中，所述同一控制信号的上升沿由0达到幅值的时长为0.3-0.4μs。
  11. 一种多路复用显示装置，其包括权利要求1所述的多路复用显示面板。
  12. 一种多路复用显示面板的驱动方法，其包括：
    通过多条栅极线逐行扫描子像素；
    每条栅极线扫描一行子像素的同时，通过多路分配器在同一控制信号的上升沿达到幅值，并由每个输入通道通过所述多条扇出线之一为对应的数据线提供数据信号时，使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值。
  13. 如权利要求12所述的多路复用显示面板的驱动方法，其中，还包括：
    通过所述多路分配器在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的电位由对应的数据线的电位调节至0。
  14. 如权利要求12所述的多路复用显示面板的驱动方法，其中，还包括：
    通过所述多路分配器在所述同一控制信号的下降沿达到0之后，将为对应的数据线提供数据信号的扇出线的下降沿在所述同一控制信号后续的另一控制信号的上升沿达到幅值之前调节至0。
  15. 如权利要求12所述的多路复用显示面板的驱动方法，其中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
    通过所述多路分配器在由同一控制信号的上升沿达到幅值之前，提前将为对应的数据线提供数据信号的扇出线的上升沿由0调节至与该条扇出线对应的数据线的电位。
  16. 如权利要求12所述的多路复用显示面板的驱动方法，其中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
    通过所述多路分配器在所述同一控制信号的上升沿达到幅值之前，减少为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长。
  17. 如权利要求12所述的多路复用显示面板的驱动方法，其中，所述使该条扇出线的上升沿所达到的电位与该条扇出线对应的数据线的电位之间的差值小于预设阈值，具体包括：
    延长同一控制信号的上升沿由0达到幅值的时长。
  18. 如权利要求12所述的多路复用显示面板的驱动方法，其中，述预设阈值为0.1V。
  19. 如权利要求16所述的多路复用显示面板的驱动方法，其中，为对应的数据线提供数据信号的扇出线的上升沿由0达到该条扇出线对应的数据线的电位的时长为0.6-0.8μs。
  20. 如权利要求17所述的多路复用显示面板的驱动方法，其中，所述同一控制信号的上升沿由0达到幅值的时长为0.3-0.4μs。
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Publication number Priority date Publication date Assignee Title
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090066378A1 (en) * 2007-09-06 2009-03-12 Himax Technologies Limited Source driver and method for restraining noise thereof
CN106782405A (zh) * 2017-02-07 2017-05-31 武汉华星光电技术有限公司 显示驱动电路及液晶显示面板
CN107993629A (zh) * 2018-01-31 2018-05-04 武汉华星光电技术有限公司 液晶显示装置的驱动方法
CN108182915A (zh) * 2017-12-28 2018-06-19 深圳市华星光电技术有限公司 多路复用型显示驱动电路
CN109754753A (zh) * 2019-01-25 2019-05-14 上海天马有机发光显示技术有限公司 一种显示面板及显示装置
CN110955091A (zh) * 2019-12-19 2020-04-03 京东方科技集团股份有限公司 一种显示面板及其驱动方法、显示装置
CN111681591A (zh) * 2020-06-28 2020-09-18 厦门天马微电子有限公司 显示模组和显示装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080180369A1 (en) * 2007-01-26 2008-07-31 Tpo Displays Corp. Method for Driving a Display Panel and Related Apparatus
TWI480847B (zh) * 2008-05-22 2015-04-11 Au Optronics Corp 液晶顯示裝置及其驅動方法
KR101127593B1 (ko) * 2010-04-07 2012-03-23 삼성모바일디스플레이주식회사 액정 표시 장치
KR101563265B1 (ko) * 2014-05-08 2015-10-27 엘지디스플레이 주식회사 표시장치 및 그 구동 방법
KR102350392B1 (ko) * 2015-04-30 2022-01-17 엘지디스플레이 주식회사 표시장치
CN105469765B (zh) * 2016-01-04 2018-03-30 武汉华星光电技术有限公司 多路复用型显示驱动电路
KR102664568B1 (ko) * 2019-07-17 2024-05-09 엘지디스플레이 주식회사 레벨 시프터와 이를 이용한 표시장치
CN113140177A (zh) * 2021-04-26 2021-07-20 武汉华星光电技术有限公司 一种多路复用电路、显示面板以及显示面板的驱动方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090066378A1 (en) * 2007-09-06 2009-03-12 Himax Technologies Limited Source driver and method for restraining noise thereof
CN106782405A (zh) * 2017-02-07 2017-05-31 武汉华星光电技术有限公司 显示驱动电路及液晶显示面板
CN108182915A (zh) * 2017-12-28 2018-06-19 深圳市华星光电技术有限公司 多路复用型显示驱动电路
CN107993629A (zh) * 2018-01-31 2018-05-04 武汉华星光电技术有限公司 液晶显示装置的驱动方法
CN109754753A (zh) * 2019-01-25 2019-05-14 上海天马有机发光显示技术有限公司 一种显示面板及显示装置
CN110955091A (zh) * 2019-12-19 2020-04-03 京东方科技集团股份有限公司 一种显示面板及其驱动方法、显示装置
CN111681591A (zh) * 2020-06-28 2020-09-18 厦门天马微电子有限公司 显示模组和显示装置

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