WO2017049679A1 - 一种液晶显示面板及其驱动方法 - Google Patents

一种液晶显示面板及其驱动方法 Download PDF

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Publication number
WO2017049679A1
WO2017049679A1 PCT/CN2015/091909 CN2015091909W WO2017049679A1 WO 2017049679 A1 WO2017049679 A1 WO 2017049679A1 CN 2015091909 W CN2015091909 W CN 2015091909W WO 2017049679 A1 WO2017049679 A1 WO 2017049679A1
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Prior art keywords
pixel
type
pixels
display panel
tft
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French (fr)
Inventor
杜鹏
陈黎暄
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/897,672 priority Critical patent/US10359677B2/en
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    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
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    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G—PHYSICS
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    • 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
    • G02F1/133345—Insulating layers
    • 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
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • G02F1/136227—Through-hole connection of the pixel electrode to the active element through an insulation layer
    • 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
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/10—Materials and properties semiconductor
    • G02F2202/104—Materials and properties semiconductor poly-Si

Definitions

  • the present invention relates to the field of liquid crystal display control technology, and in particular to a liquid crystal display panel and a driving method thereof.
  • the prior art design for improving the bias of the large-view character is generally to divide the pixel into two zones, a Main zone and a Sub zone.
  • the brightness of the Main area is high, and the brightness of the Sub area is low, thereby improving the large viewing angle characteristics of the panel.
  • the area of the Sub area is relatively large, accounting for about 60% of the pixel opening area, which reduces the transmittance of the entire pixel, increases the power consumption of the backlight, and does not conform to the concept of environmental protection and energy conservation.
  • the present invention provides a liquid crystal display panel and a driving method thereof for improving the transmittance of a liquid crystal display panel and reducing backlight power consumption.
  • a liquid crystal display panel comprising:
  • the plurality of spaced regions are formed in cooperation with the scan lines, and each of the spaced regions is provided with a pixel.
  • the pixels in the display area are respectively displayed as a first type of pixel or a second type of pixels according to a predetermined rule, and in the case of the same gray level signal input, the brightness of the first type of pixel is Higher, the brightness of the second type of pixels is lower.
  • the first type of pixels and the second type of pixels are spaced apart in the longitudinal direction and the lateral direction.
  • one of the adjacent two columns of pixels is a The first type of pixels are described, and the other column is the first type of pixels and the second type of pixels arranged at intervals. Such two columns of pixels are staggered on the display panel.
  • each of the pixels is provided with two TFTs controlled by the same scanning line, one of which is a charging TFT for charging the pixel and the other is a discharge TFT for the vertical direction. Adjacent pixels are discharged.
  • each pixel in a column in which the first type of pixels and the second type of pixels are arranged at intervals, each pixel is provided with two TFTs controlled by the same scanning line, one of which is a charging TFT.
  • a charging TFT For charging the pixel, and the other is a discharge TFT for discharging longitudinally adjacent pixels;
  • Each of the columns of the first type of pixels is provided with one charging TFT.
  • two adjacent pixels having two TFTs in the same column are a group, wherein each pixel is provided with two TFTs controlled by the same scanning line, and one pixel of the same group of pixels
  • the charging TFT is connected to the discharge TFT of the other pixel, and one end of the discharge TFT is connected to the common electrode.
  • the discharge TFT is connected to the common electrode through a coupling capacitor.
  • the same group of pixels includes a first type of pixel and a second type of pixel in the same column, wherein a gate of the charging TFT of the first type of pixel is connected to a corresponding scan line thereof. a source and a drain of the charging TFT are respectively connected to corresponding data lines and pixel electrodes of the first type of pixels in the same group;
  • a gate of the discharge TFT of the first type of pixel is connected to a scan line corresponding to the second type of pixel in the same group, and a source and a drain of the discharge TFT are respectively connected to a pixel electrode of the first type of pixel Connected to the common electrode;
  • a gate of the charging TFT of the second type of pixel is connected to a corresponding scan line thereof, and a source and a drain of the charging TFT are respectively connected to corresponding data lines and pixel electrodes of the second type of pixels in the same group ;
  • a gate of the discharge TFT of the second type of pixel is connected to a scan line corresponding to the first type of pixel in the same group, and a source and a drain of the discharge TFT and a pixel electrode of the second type of pixel respectively Connected to the common electrode.
  • a driving method for the above liquid crystal display panel includes: in a driving mode in which a data line column is reversed, two consecutive frames of display screen scanning lines are turned on in a forward direction, and two consecutive frames are displayed.
  • the screen scanning line is reversely turned on, so that the pixels in the display area are switched between the first type of pixels and the second type of pixels, and when the display panel is normally displayed, the first type of pixels and the second type
  • the pixels are arranged according to a predetermined rule.
  • the invention can improve the large viewing angle characteristics of the display panel by setting a novel pixel structure, the wiring manner and the corresponding driving method, and can also improve the transmittance of the panel and improve the reliability of the panel.
  • FIG. 1 is a schematic diagram of a conventional pixel structure for improving large viewing angle characteristics in the prior art
  • FIG. 2 is a schematic diagram of a pixel structure in accordance with an embodiment of the present invention.
  • FIG. 3a is a schematic diagram showing a first arrangement of pixel structures according to an embodiment of the present invention.
  • FIG. 3b is a schematic diagram showing a second pixel structure arrangement according to an embodiment of the present invention.
  • FIG. 4 is a voltage diagram of a first type of pixel and a second type of pixel in accordance with an embodiment of the present invention
  • FIG. 5a is a first wiring diagram of a liquid crystal display panel according to an embodiment of the present invention.
  • 5b is a schematic view showing a second wiring of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 5c is a third wiring diagram of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 6a is a schematic diagram showing the operation principle of charging a pixel in the liquid crystal display panel of FIG. 5a;
  • 6b is a schematic diagram showing the operation principle of one pixel discharge in the liquid crystal display panel of FIG. 5a;
  • FIG. 7 is a schematic diagram showing driving waveforms and display of one pixel in a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a GOA circuit for generating a scan line drive waveform in accordance with an embodiment of the present invention
  • FIG. 9 is a schematic diagram of a driving waveform corresponding to FIG. 8.
  • FIG. 1 is a schematic diagram of a conventional pixel structure for improving large viewing angle characteristics in the prior art.
  • the dotted line frame is a sub-pixel, and each sub-pixel is divided into two regions of 11 regions and 12 regions, wherein 11 regions represent the main region, 12 regions represent the Sub region, and R represents a red sub-pixel, G Represents a green subpixel and B represents a blue subpixel.
  • the area of the Sub region accounts for 60% of the open area of the pixel
  • the Main area accounts for 40%
  • the brightness of the Main area is higher than the brightness of the Sub area.
  • This design makes the transmittance of the entire pixel drop to a large extent, resulting in backlight power consumption. increase.
  • the present invention provides a novel liquid crystal display panel, which can improve the large viewing angle characteristics of the liquid crystal display panel, increase the transmittance of the pixel, and reduce the backlight power consumption.
  • FIG. 2 is a schematic structural diagram of two types of pixels having different brightness on a liquid crystal display panel according to an embodiment of the present invention. The present invention will be described in detail below with reference to FIG. 2 .
  • the liquid crystal display panel includes a plurality of scan lines and a plurality of data lines.
  • the data lines and the scan lines are interlaced to form a plurality of spaced regions, and each of the spaced regions is provided with one pixel.
  • a pixel herein refers to a sub-pixel or sub-pixel, which is collectively referred to as a pixel in the present invention for convenience of presentation.
  • the pixels are divided into two types based on the display condition, and the first type of pixel H has a higher brightness, corresponding to the Main area of FIG. 1, and the second type of pixel L is brighter. Low, corresponding to the Sub area of Figure 1.
  • the first type of pixels 21 includes three types of RH, GH, and BH
  • the second type of pixels 22 includes three types of RL, GL, and BL
  • R, G, and B correspond to pixels of three colors of red, green, and blue. .
  • These two types of pixels are arranged according to a predetermined rule, which can improve the large viewing angle characteristics of the liquid crystal display panel.
  • the first type of pixels H and the second type of pixels L are spaced apart and evenly distributed throughout the display area of the panel.
  • the first type of pixel H and the second type of pixel L are spaced apart in the horizontal and vertical directions, that is, the first, fourth, and fourth directions of each of the first type of pixels H are the second type of pixels L, for each The same is true for the second type of pixel L.
  • the high-brightness Main area and the low-bright Sub area ratio are often around 2:3. With this design, the area of the high-brightness area is increased to 50%, and the transmittance of the display panel is improved.
  • one of the adjacent two columns of pixels is a first type of pixel H
  • the other column is a first type of pixel H and a second type that are spaced apart.
  • the pixel L such two columns of pixels are staggered on the display panel.
  • each of the eight pixels around the second type of pixel L is a high-brightness first-type pixel H.
  • the number ratio of the first type of pixel H to the second type of pixel L is 3:1.
  • the area ratio of the high-brightness area is 75%, and the area ratio of the low-luminance area is 25%, which can improve the large viewing angle characteristics of the display panel, and the ratio of the high-brightness area is increased by 40% compared with the conventional design. Up to 75%, it can also effectively improve the transmittance of the display panel.
  • the number ratio of the first type of pixel H and the second type of pixel L can be set to be 1 to 100. This value is set based on the specific penetration rate.
  • the brightness of the first type of pixel H is higher, that is, the voltage difference between the pixel electrode and the common electrode is larger.
  • 4 shows voltage variations of the first type of pixel H and the second type of pixel L, wherein a broken line indicates the voltage Vcom of the common electrode, and FP indicates a frame display picture time.
  • the voltage difference between the pixel electrode and the common electrode in the first type of pixel H is about 7.0 V, and in the case of inversion driving, the voltage variation range of the pixel electrode is ( Vcom-7.0 ⁇ Vcom+7.0)V.
  • the voltage of the pixel electrode in the second type of pixel L is close to the voltage Vcom of the common electrode.
  • the voltage difference between the two is about 5.0V
  • the pixel electrode voltage variation range of the second type of pixel L is (Vcom). -5.0 to Vcom+5.0)V. This will result in inconsistent biasing of the TFTs on the entire panel, and the degree of drift of the TFT characteristics after long-term operation will be different, which will affect the reliability of the TFT.
  • the present invention also provides a wiring manner and a corresponding driving method for the liquid crystal display panel of the above pixel structure.
  • FIG. 5a is a schematic diagram showing the wiring of a liquid crystal display panel corresponding to the pixel arrangement in FIG. 3a.
  • Each pixel is provided with two TFTs controlled by the same scanning line, wherein one TFT is a charging TFT for charging the pixel, and the other TFT is a discharging TFT for discharging vertically adjacent pixels.
  • a schematic diagram of the structure of one pixel P n,n on the display panel is shown in the dotted line frame of FIG. 5a. The pixel will be described below as an example.
  • the TFT 51 on the pixel P n,n is used to charge the pixel
  • the TFT 52 on the pixel P n,n is used to discharge the adjacent pixel P n+1,n .
  • two pixels adjacent in the longitudinal direction are regarded as a group, wherein a charging TFT of one pixel is connected to a discharge TFT of another pixel, such as a pixel Pn, n and a pixel Pn+1 in FIG. 5a.
  • n as one group, a pixel P n, the charging TFT51 the pixel on the n P n + 1, the discharge TFT52 the n connections, the pixel P n, discharge TFT52 the pixels on the n P n + 1, the charging TFT51 the n connection.
  • the pixel P n + 1, n of the two TFT are open, wherein the pixel P n + 1, TFT51 n charge on the pixel, the pixel The TFT 52 on P n+1,n discharges the vertically adjacent pixels P n,n .
  • the scan signal on the scan line G (n) arrives, the pixel P n, n on the two TFT are open, wherein the pixel P n, the pixel TFT 51 on the n-charging, the pixel P n, TFT 52 of the n
  • the vertically adjacent pixels P n+1,n are discharged.
  • a pixel column driven by the data line D(n) will be described as an example.
  • the scanning lines are turned on in the order of G(n) ⁇ G(n+1) ⁇ G(n+2), ..., the scanning line G(n) is turned on, the pixels P n, n are charged, and the scanning line G (n+) 1) On, the pixels P n+1, n are charged, while the pixels P n, n discharge a portion of the stored electrical energy.
  • the pixel P n,n is a second type of pixel
  • the pixel P n+1,n is the first type of pixel H.
  • the pixel P n+2,n is the second type of pixel L
  • the pixel P n+3,n is the first type of pixel H.
  • the first type of pixel H and the second type of pixel L appear alternately at intervals.
  • the charging and discharging process of the pixel P n,n will be described by taking the branch of the charging TFT 51 on the pixel P n,n and the discharging TFT 52 on the pixel Pn+1,n in the dotted frame as an example, and the other pixels have the same Charge and discharge process.
  • the scanning line G(n) is first turned on, and the pixels Pn, n are charged by the charging TFT 51 on the pixel Pn,n . And then the next one scanning line G (n + 1) is opened, the pixel P n, n connected by the pixel P n + 1, n discharge TFT52 on the common electrode 53, so that the pixel P n, n and the common electrode voltage more Close, the brightness is lowered, so that the pixel P n,n is displayed as the second type of pixel L.
  • the pixel P n, n of the next row of pixels P n + 1, charging connections on the TFT51 n and the pixel P n, the same charging TFT51 n, but the discharge connection TFT52 vary.
  • the gate of the discharge TFT 52 is connected to its upper-stage scanning line G(n).
  • G (n) is first opened to the pixel P n + 1, n discharge, then the pixel P n + 1, n corresponding to the scanning line G (n + 1) is opened, the pixel P n + 1, n charge.
  • the pixel electrode voltage of the pixel P n+1,n and the voltage difference of the common electrode are larger than the pixel P n,n of the previous row, so the brightness is also higher, so that the pixel P n+1,n is displayed as the first class.
  • Pixel H Pixel H.
  • two pixels located in two adjacent columns of pixels and disposed in the same row one of which is regarded as a group with pixels in the upper row of the same column, and the other pixel is located in the next row of the same column.
  • the pixel P n,n and the pixel P n+1,n in the pixel column driven by the data line D(n) are grouped into one group, and the pixel P in the pixel column driven by the data line D(n+1) n+1, n+1 and pixels P n+1, n+2 are grouped into one group.
  • the pixel P n,n is the second type of pixel L
  • the pixel P n,n+1 is the first type of pixel H
  • the first type of pixel H and the second type of pixel L Alternate intervals appear.
  • the resulting display effect is shown in Figure 3a.
  • the four TFTs in the same group of pixels are connected as shown in FIG. 5a, and the same group of pixels includes the first type of pixels P n+1,n and the second type of pixel pixels P n,n in the same column, wherein the first type
  • the gate of the charging TFT 51 of the pixel P n+1,n is connected to the corresponding scanning line G(n+1), and the source and the drain of the charging TFT 51 are respectively associated with the corresponding data line D(n) and the first type of pixel.
  • P n + 1, n is connected to the pixel electrode.
  • the first type of pixel P n+1,n is discharged by the discharge TFT 52 on the second type of pixel P n,n , and the gate of the discharge TFT 52 on the pixel P n,n is connected to its corresponding scan line G(n), the source The pole and the drain are respectively connected to the pixel electrode and the common electrode of the first type of pixel P n+1,n .
  • the gate of the charging TFT 51 of the second type of pixel P n,n is connected to the corresponding scanning line G(n), and the source and the drain of the charging TFT 51 are respectively associated with the corresponding data line D(n) and the second. class pixel P n, n is connected to the pixel electrode.
  • the second type of pixel P n,n is discharged by the discharge TFT 52 on the first type of pixel P n+1,n , and the gate of the discharge TFT 52 on the pixel P n+1,n and its corresponding scan line G(n+1) Connected, the source and the drain are respectively connected to the pixel electrode and the common electrode of the second type of pixel P n,n .
  • FIG. 5b is a schematic diagram showing the wiring of a liquid crystal display panel corresponding to the pixel arrangement in FIG. 3b.
  • the columns of the first type of pixels H and the second type of pixels L are arranged at intervals, which are the same as the pixel structure in FIG. 5a.
  • the pixels are each provided with two TFTs controlled by the same scanning line, one of which is a charging TFT 51 for charging the pixel, and the other is a discharging TFT 52 for discharging vertically adjacent pixels.
  • each pixel is provided with one charging TFT and no discharge TFT. As shown in FIG.
  • the columns of the pixels Pn, n are arranged with the first type of pixels H and the second type of pixels L, and the columns of the pixels Pn, n+1 are all of the first type of pixels H.
  • the display of the first type of pixel H and the second type of pixel L of the pixel column driven by the data line D(n) in Fig. 5b is the same as that of Fig. 5a.
  • the pixel in the pixel column driven by the data line D(n+1) in Fig. 5b has no discharge TFT and only the charging TFT, so the column is only displayed as the first type of pixel H.
  • one end of the discharge TFT 52 on one pixel is connected to the charging TFT 51 on the other pixel, and the other end is connected to the common electrode 53, as shown in Figs. 5a and 5b.
  • one end of the discharge TFT 52 on one pixel is connected to the charging TFT 51 on the other pixel, and the other end is connected to the common electrode 53 through the coupling capacitor 54, as shown in FIG. 5c. Show. By configuring the parameters of the coupling capacitor 54, the desired voltage difference across the pixel electrode can be obtained.
  • the present invention provides a driving method for the above liquid crystal display panel.
  • the driving method under the condition that the data line column is inverted, the scanning lines of the display screen are opened in two consecutive frames, and the scanning lines of the two consecutive frames are reversely opened, so that the first type of pixels H and the second type of pixels L are predetermined.
  • the rules are arranged to improve the transmittance of the panel while improving the large viewing angle characteristics of the display panel.
  • FIG. 7 shows a driving manner of the circuit shown in FIGS. 5a, 5b, and 5c, including the opening sequence of the scanning lines, the inversion mode of the data lines, and the corresponding pixel display results.
  • the pixel P n,n in the dotted line frame of FIG. 5a will be described as an example.
  • the entire display panel takes four frame images as one cycle, and two adjacent frame times, the scan lines follow...G(n) ⁇ G(n+1)
  • the pixel electrode voltages of all the pixels in the panel are cycled in four frames, and are sequentially switched in one cycle to undergo L+ ⁇ H- ⁇ shown in part (c) of FIG. 7 .
  • the voltage-carrying conditions of their TFTs are identical, that is, the drift of the TFT characteristics inside the entire panel is uniform, thereby avoiding the reliability problem that may be caused.
  • the pixel voltages in the columns in which the first type of pixels H and the second type of pixels L are spaced apart are also in accordance with the process of L+ ⁇ H- ⁇ H+ ⁇ L- shown in part (c) of FIG. Conversion.
  • the columns of the first type of pixel H since there is no discharge TFT, their pixel voltage is only cyclically converted between H- and H+. Therefore, the above driving method is employed in FIG. 5b, and the reliability problem caused by the TFT voltage unevenness can also be avoided.
  • the driving waveform of the scanning line in FIG. 7 can be generated by the GOA circuit, and the structure of the GOA circuit is as shown in FIG.
  • the Vsf signal lines are respectively connected to the gates of the TFT switches on the scan sequence control line ST(n-2) and the scan signal line G(n+2) for controlling the opening and closing of the corresponding TFT switches.
  • the Vsr signal lines are respectively connected to the gates of the TFT switches on the scan sequence control lines ST(n+2) and the scan signal lines G(n-2) for controlling the opening and closing of the corresponding TFT switches.
  • the Vsf signal line or the Vsr signal line controls the corresponding TFT switch to be turned on, and cooperates with the clock signal CK, the power signal Vss and the additional pull-down circuit APDC provided by the clock signal circuit to set the ST(n) point.
  • the potential is pulled low, so that the scan signal output terminal G(n) outputs a corresponding waveform signal.
  • FIG. 9 is a schematic diagram of driving waveforms corresponding to the circuit of FIG. 8.
  • a circuit of four sets of CK clock signals will be described as an example.

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Abstract

一种液晶显示面板及其驱动方法，该显示面板包括：多条扫描线；多条数据线，与扫描线配合形成多个间隔区域，每个间隔区域内均设置有一像素，其中，在显示面板正常显示时，显示区内的像素按预定规则分别显示为第一类像素（H）或第二类像素（L），在相同灰阶信号输入的情况下，第一类像素（H）的亮度较高，第二类像素（L）的亮度较低。该显示面板可以改善显示面板大视角特性，还可以提高面板的穿透率，提升面板的信赖性。

Description

一种液晶显示面板及其驱动方法
相关技术的交叉引用
本申请要求享有2015年9月21日提交的名称为“一种液晶显示面板及其驱动方法”的中国专利申请201510605170.7的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示控制技术领域，具体地说，涉及一种液晶显示面板及其驱动方法。
背景技术
传统VA模式液晶显示面板在大视角观看时，往往会出现色偏问题。现有技术中用于改善大视角色偏的设计一般是将像素分为两个区，Main区和Sub区。液晶显示面板工作时，Main区的亮度较高，Sub区的亮度较低，以此来改善面板的大视角特性。Sub区的面积较大，占像素开口区的60％左右，这就使得整个像素的穿透率降低，增加了背光的功耗，不符合绿色环保节能的理念。
发明内容
为解决以上问题，本发明提供了一种液晶显示面板及其驱动方法，用于提高液晶显示面板的穿透率，降低背光功耗。
根据本发明的一个方面，提供了一种液晶显示面板，包括：
多条扫描线；
多条数据线，与所述扫描线配合形成多个间隔区域，每个所述间隔区域内均设置有一像素，
其中，在显示面板正常显示时，显示区内的所述像素按预定规则分别显示为第一类像素或第二类像素，在相同灰阶信号输入的情况下，所述第一类像素的亮度较高，所述第二类像素的亮度较低。
根据本发明的一个实施例，在显示面板正常显示时，所述第一类像素和所述第二类像素在纵向和横向均间隔排列。
根据本发明的一个实施例，在显示面板正常显示时，在相邻两列像素中，一列均为所 述第一类像素，另一列为间隔排列的所述第一类像素与所述第二类像素，这样的两列像素在显示面板上间隔交错排列。
根据本发明的一个实施例，每个所述像素均设置有两个由同一条扫描线控制的TFT，其中一个为充电TFT，用于对该像素充电，另一个为放电TFT，用于对纵向相邻的像素放电。
根据本发明的一个实施例，在间隔排列所述第一类像素与所述第二类像素的列中，每个像素均设置有两个由同一条扫描线控制的TFT，其中一个为充电TFT，用于对该像素充电，另一个为放电TFT，用于对纵向相邻的像素放电；
均为所述第一类像素的列中，每个像素均设置有一个充电TFT。
根据本发明的一个实施例，同一列中具有两个TFT的相邻两个像素为一组，其中每个像素均设置有两个由同一条扫描线控制的TFT，同一组像素中的一个像素的充电TFT与另一个像素的放电TFT连接，且所述放电TFT的一端与公共电极连接。
根据本发明的一个实施例，所述放电TFT通过耦合电容与公共电极连接。
根据本发明的一个实施例，当相邻两列像素均具有两个由同一条扫描线控制的TFT时，位于相邻两列像素内且同行设置的两个像素，其中一个与位于同列的上一行的像素视为一组，另一个与位于同列的下一行的像素视为一组。
根据本发明的一个实施例，所述同一组像素包括位于同列的第一类像素和第二类像素，其中，所述第一类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第一类像素的像素电极连接；
所述第一类像素的放电TFT的栅极和与同一组内所述第二类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第一类像素的像素电极及公共电极相连；
所述第二类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第二类像素的像素电极连接；
所述第二类像素的放电TFT的栅极和与同一组内所述第一类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第二类像素的像素电极及公共电极相连。
根据本发明的另一个方面，一种用于以上所述液晶显示面板的驱动方法，包括：在数据线列反转的驱动模式下，连续两帧显示画面扫描线正向开启，连续两帧显示画面扫描线反向开启，使显示区内的所述像素在所述第一类像素和所述第二类像素之间切换，并使得在显示面板正常显示时，第一类像素和第二类像素按预定规则排列。
本发明通过设置新型的像素结构、布线方式及对应的驱动方法，可以改善显示面板大视角特性，还可以提高面板的穿透率，提升面板的信赖性。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例共同用于解释本发明，并不构成对本发明的限制。在附图中：
图1是现有技术中用于改善大视角特性的传统像素结构示意图；
图2是根据本发明的一个实施例的像素结构示意图；
图3a是根据本发明的一个实施例的第一种像素结构排列示意图；
图3b是根据本发明的一个实施例的第二种像素结构排列示意图；
图4是根据本发明的一个实施例的第一类像素和第二类像素的电压示意图；
图5a是根据本发明的一个实施例的液晶显示面板第一种布线示意图；
图5b是根据本发明的一个实施例的液晶显示面板第二种布线示意图；
图5c是根据本发明的一个实施例的液晶显示面板第三种布线示意图；
图6a是图5a的液晶显示面板中的一个像素充电的工作原理示意图；
图6b是图5a的液晶显示面板中的一个像素放电的工作原理示意图；
图7是根据本发明的一个实施例的液晶显示面板中一个像素的驱动波形及显示示意图；
图8是根据本发明的一个实施例的用于产生扫描线驱动波形的一种GOA电路示意图；以及
图9是对应图8的驱动波形示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，以下结合附图对本发明作进一步地详细说明。
图1是现有技术中用于改善大视角特性的传统像素结构示意图。如图1所示，虚线框内为一个亚像素，每个亚像素分为11区和12区两个区，其中，11区表示Main区，12区表示Sub区，R表示红亚像素，G表示绿亚像素，B表示蓝亚像素。对于图1虚线框所示的每一亚像素而言，Sub区的面积占像素开口区的60％，Main区占40％，Main区亮度高于Sub区亮度。这种设计使得整个像素的穿透率有较大程度的下降，导致背光功耗的 增加。
因此，本发明提供了一种新型的液晶显示面板，既可以改善液晶显示面板的大视角特性，还可以增大像素的透光率，降低背光功耗。
如图2所示为根据本发明的一个实施例的一种液晶显示面板上的两类具有不同亮度的像素的结构示意图，以下参考图2来对本发明进行详细说明。
该液晶显示面板包括多条扫描线和多条数据线，数据线与扫描线交错配合形成多个间隔区域，每个间隔区域内均设置有一个像素。此处的像素指的是一个子像素或亚像素，为表述方便在本发明中统称为像素。
在显示面板正常显示时，在相同灰阶信号输入的情况下，这些像素基于显示情况划分为两类，第一类像素H亮度较高，对应图1的Main区，第二类像素L亮度较低，对应图1的Sub区。如图2所示，第一类像素21包括RH、GH、BH三种，第二类像素22包括RL、GL、BL三种，R、G、B对应红、绿、蓝三种颜色的像素。这两类像素按预定规则排列，可以改善液晶显示面板的大视角特性。
在本发明中，不必将每个像素切割为图1中那样的Main区和Sub区，可以减轻工艺制作的难度。通过控制不同亮度的第一类像素H和第二类像素L的排布，就可以改善显示面板的大视角特性。
在本发明的一个实施例中，在显示面板正常显示时，第一类像素H和第二类像素L间隔排列，均匀分布在整个面板的显示区内。如图3a所示，第一类像素H和第二类像素L在横向和纵向均间隔排列，即每一个第一类像素H的上下左右四个方向都是第二类像素L，对于每一个第二类像素L的情况也是如此。在传统的设计中，高亮度的Main区和低亮度的Sub面积比往往在2：3左右，采用这种设计之后，高亮度区域的面积提升至50％，提高了显示面板的穿透率。
在本发明的另一个实施例中，在显示面板正常显示时，在相邻两列像素中，其中一列均为第一类像素H，另一列为间隔排列的第一类像素H与第二类像素L，这样的两列像素在显示面板上间隔交错排列。如图3b所示，每一个第二类像素L四周的8个像素都全部为高亮度的第一类像素H。整个显示面板上，第一类像素H和第二类像素L的数量比为3：1。即高亮度区域所占面积比为75％，低亮度区域所占面积比为25％，这样既可以提高显示面板的大视角特性，且与传统设计相比，高亮度区域的比例由40％上升至75％，还可以有效的提高显示面板的穿透率。
由以上分析可知，在一般情况下，为有效提高显示面板的穿透率，可将第一类像素H和第二类像素L的数量比设置为1～100。该数值比基于具体的穿透率需要设定。
在显示面板正常显示时，第一类像素H亮度较高，即像素电极和公共电极的电压差较大。图4示出了第一类像素H和第二类像素L的电压变化情况，其中，虚线表示公共电极的的电压Vcom，FP表示一帧显示画面时间。如图4所示，在255灰阶下，第一类像素H中的像素电极和公共电极的电压差为7.0V左右，则在反转驱动的情况下，该像素电极的电压变动范围为(Vcom-7.0～Vcom+7.0)V。第二类像素L中的像素电极的电压接近公共电极的电压Vcom，在255灰阶下，两者的电压差大约为5.0V左右，则第二类像素L的像素电极电压变动范围是(Vcom-5.0～Vcom+5.0)V。这样就会导致整个面板上对TFT充电的偏压情况不一致，长期工作后TFT特性发生漂移的程度也不同，这会影响TFT的信赖性。
为了解决TFT的信赖性问题，本发明还提供了针对以上像素结构的液晶显示面板的布线方式及相应的驱动方法。
如图5a所示为对应图3a中像素排列的一种液晶显示面板的布线示意图。每个像素均设置有两个由同一条扫描线控制的TFT，其中一TFT为充电TFT，用于对该像素充电，另一个TFT为放电TFT，用于对纵向相邻的像素放电。如图5a虚线框内所示为该显示面板上一个像素Pn,n的结构示意图，以下以该像素为例来进行说明。其中，像素Pn,n上的TFT51用于对该像素进行充电，像素Pn,n上的TFT52用于对相邻的像素Pn+1,n进行放电。
如图5a所示，将纵向相邻的两个像素视为一组，其中一个像素的充电TFT与另一像素的放电TFT连接，如图5a中的像素Pn,n和像素Pn+1,n作为一组，像素Pn,n上的充电TFT51与像素Pn+1,n上的放电TFT52连接，像素Pn,n上的放电TFT52与像素Pn+1,n上的充电TFT51连接。这样，当扫描线G(n+1)上的扫描信号到达时，像素Pn+1,n上的两个TFT均打开，其中像素Pn+1,n上的TFT51对该像素充电，像素Pn+1,n上的TFT52对纵向相邻的像素Pn,n放电。当扫描线G(n)上的扫描信号到达时，像素Pn,n上的两个TFT均打开，其中像素Pn,n上的TFT51对该像素充电，像素Pn,n上的TFT52对纵向相邻的像素Pn+1,n放电。
具体以数据线D(n)驱动的像素列为例进行说明。当扫描线按G(n)→G(n+1)→G(n+2)……的顺序开启时，扫描线G(n)开启，像素Pn,n充电，扫描线G(n+1)开启，像素Pn+1,n充电，同时像素Pn,n放掉一部分储存的电能。此时，像素Pn,n作为第二类像素，像素Pn+1,n作为第一类像素H。以此类推，像素Pn+2,n为第二类像素L，像素Pn+3,n为第一类像素H。这样，在同一列像素中，第一类像素H和第二类像素L交替间隔出现。
下面将以该虚线框内的像素Pn,n上的充电TFT51及像素Pn+1,n上的放电TFT52组成的支路为例来说明像素Pn,n的充放电过程，其他像素具有相同的充放电过程。
如图6a所示为图5a所示的液晶显示面板中的像素Pn,n充电的工作原理示意图，图中 右侧是该扫描线对应的波形图，图中标注的a1-b1、a2-b2均表示导通的电路；图中左侧箭头标注方向为充电路径。如图6b所示为图5a所示的液晶显示面板中的像素Pn,n放电的工作原理示意图，图中右侧是该扫描线对应的波形图，图中标注的a3-b3、a4-b4均表示导通的电路；图中左侧箭头标注方向为放电路径。
正常工作时，扫描线G(n)首先打开，通过像素Pn,n上的充电TFT51对像素Pn,n进行充电。然后下一级扫描线G(n+1)打开，像素Pn,n通过像素Pn+1,n上的放电TFT52与公共电极53连接，从而使得像素Pn,n的电压与公共电极更加接近，亮度降低，使像素Pn,n显示为第二类像素L。
该像素Pn,n的下一行像素Pn+1,n上的充电TFT51连接方式和像素Pn,n上的充电TFT51相同，但放电TFT52的连接方式有所差异。在像素Pn+1,n中，放电TFT52的栅极连接它的上一级扫描线G(n)。在正常工作时G(n)首先打开对像素Pn+1,n放电，然后像素Pn+1,n对应的扫描线G(n+1)打开，像素Pn+1,n充电。这样，像素Pn+1,n的像素电极电压与公共电极的电压差会比上一行的像素Pn,n大，因此亮度也更高，使像素Pn+1,n显示为第一类像素H。
从这里可以看出，如果是G(n)首先开启，然后G(n+1)打开，则图5中的像素Pn,n亮度就会降低，该像素Pn,n就显示为第二类像素L。如果是扫描线G(n+1)首先开启，则像素Pn,n会正常充电，其像素电极电压与公共电极的电压差会比较大，亮度也相对较高，该像素Pn,n就显示为第一类像素H。
在本发明的一个实施例中，位于相邻两列像素内且同行设置的两个像素，其中一个与位于同列的上一行的像素视为一组，另一个与位于同列的下一行的像素视为一组。如图5a所示，数据线D(n)驱动的像素列中像素Pn,n和像素Pn+1,n分为一组，数据线D(n+1)驱动的像素列中像素Pn+1,n+1和像素Pn+1,n+2分为一组。这样，在横向上，像素Pn,n为第二类像素L，像素Pn,n+1为第一类像素H，则在同一行像素中，第一类像素H和第二类像素L交替间隔出现。最终形成的显示效果如图3a所示。
同一组像素内的四个TFT的连接方式如图5a所示，同一组像素包括位于同列的第一类像素Pn+1,n和第二类像素像素Pn,n，其中，第一类像素Pn+1,n的充电TFT51的栅极和与其对应的扫描线G(n+1)连接，充电TFT51的源极和漏极分别与对应的数据线D(n)和第一类像素Pn+1,n的像素电极连接。第一类像素Pn+1,n通过第二类像素Pn,n上的放电TFT52放电，像素Pn,n上的放电TFT52的栅极与其第对应的扫描线G(n)相连，源极和漏极分别与第一类像素Pn+1,n的像素电极及公共电极相连。
同理，第二类像素Pn,n的充电TFT51的栅极和与其对应的扫描线G(n)连接，充电 TFT51的源极和漏极分别与对应的数据线D(n)和第二类像素Pn,n的像素电极连接。第二类像素Pn,n通过第一类像素Pn+1,n上的放电TFT52放电，像素Pn+1,n上的放电TFT52的栅极与其对应的扫描线G(n+1)相连，源极和漏极分别与第二类像素Pn,n的像素电极及公共电极相连。
如图5b所示为对应图3b中像素排列的一种液晶显示面板的布线示意图，间隔排列第一类像素H与第二类像素L的列中，与图5a中的像素结构相同，每个像素均设置有两个由同一条扫描线控制的TFT，其中一个为充电TFT51，用于对该像素充电，另一为放电TFT52，用于对纵向相邻的像素放电。均为第一类像素H的列中，每个像素均设置有一个充电TFT，无放电TFT。如图5b所示，像素Pn,n所在的列间隔排列第一类像素H与第二类像素L，像素Pn,n+1所在的列均为第一类像素H。像素Pn,n所在的列中的相邻两个像素视为一组，其中像素Pn,n上的充电TFT51与另一个像素Pn+1,n上的放电TFT52连接，其像素Pn,n的放电TFT52与另一个像素Pn+1,n上的充电TFT51连接。
图5b中数据线D(n)驱动的像素列的第一类像素H和第二类像素L的显示情况与图5a相同。但是，图5b中数据线D(n+1)驱动的像素列中的像素无放电TFT，只有充电TFT，因此该列只作为第一类像素H显示。
在本发明中，在同一组像素中，一个像素上的放电TFT52的一端与另一个像素上的充电TFT51连接，另一端与公共电极53连接，如图5a和5b所示。在本发明的另一个实施例中，在同一组像素中，一个像素上的放电TFT52的一端与另一个像素上的充电TFT51连接，另一端通过耦合电容54与公共电极53连接，如图5c所示。通过配置耦合电容54的参数，可以获得所需的像素电极两端的电压差。
对应不同扫描线的开启方式，本发明提供了一种用于以上液晶显示面板的驱动方法。该驱动方法在数据线列反转的条件下，连续两帧显示画面扫描线正向开启，连续两帧显示画面扫描线反向开启，以使得第一类像素H和第二类像素L按预定规则排列，用以在改善显示面板的大视角特性同时增加面板的穿透率。如图7所示为图5a、5b和5c所示电路的一种驱动方式，包括扫描线的开启顺序、数据线的反转方式及对应的像素显示结果。此处以图5a虚线框内的像素Pn,n为例进行说明。
如图7中的(a)部分所示，整个显示面板以4个帧图像为一个周期，其中两个相邻的帧时间内，扫描线按照……G(n)→G(n+1)→G(n+2)……的顺序开启，在另外的两个相邻的帧时间内，则是按照……G(n+2)→G(n+1)→G(n)……的顺序开启。
在数据线列反转(如图7中的(b)部分)的方式下，对于图5a虚线框中的像素Pn,n，它的像素电极电压波形如图7中的(c)部分所示，即它在两个帧的时间内处于高电压状 态，即显示为第一类像素H，且它在其中一个帧的时间是正极性，在另外一个帧的时间内是负极性，如图7中(c)部分的H+和H-。像素Pn,n在其余两个帧的时间内处于低电压状态，即显示为第二类像素L，同样，它在其中一个帧的时间内是正极性，在另外一个帧的时间内是负极性，如图7中(c)部分的L+和L-。
采用这种驱动方式之后，面板内部所有像素的像素电极电压都会以4个帧为一个周期进行循环，分别在一个周期内依次切换以经历图7中(c)部分所示的L+→H-→H+→L-的过程。它们的TFT的受压状况是完全相同的，即整个面板内部的TFT特性发生漂移的情况是一致的，从而避免了可能导致的信赖性问题。
对应图5b，其中间隔排列的第一类像素H与第二类像素L所在的列中的像素电压，也按照图7中(c)部分所示的L+→H-→H+→L-的过程转换。均为第一类像素H的列，由于没有放电TFT，其像素电压仅在H-和H+之间循环转换。因此，图5b采用以上的驱动方式，也可以避免TFT电压不均导致的信赖性问题。
图7中扫描线的驱动波形可以由GOA电路来产生，GOA电路结构如图8所示。如图8所示，Vsf信号线分别与扫描顺序控制线ST(n-2)和扫描信号线G(n+2)上的TFT开关的栅极连接，用于控制对应TFT开关的开启和关闭。Vsr信号线分别与扫描顺序控制线ST(n+2)和扫描信号线G(n-2)上的TFT开关的栅极连接，用于控制对应TFT开关的开启和关闭。当提供高电压信号时，Vsf信号线或Vsr信号线控制对应的TFT开关打开，并与时钟信号电路提供的时钟信号CK、电源信号Vss和附加下拉电路APDC相配合，将ST(n)点的电位拉低，进而使得扫描信号输出端G(n)输出对应的波形信号。
如图9所示为对应图8电路的驱动波形示意图。此处以4组CK时钟信号的电路为例进行说明。
结合图8和图9，其中，由Vsf和Vsr两个电压信号来控制扫描线开启的顺序，每两帧的时间切换一次极性。Vsf为高电平时，扫描线按照……G(n)→G(n+1)→G(n+2)……的顺序开启，Vsr为高电平时，扫描线按照按照……G(n+2)→G(n+1)→G(n)……的顺序开启。四组CK信号也是每两帧时间改变一次相互之间的时序关系，其他下拉信号和现有的GOA电路一致，最终就可以得到所需要的扫描线输出波形。该驱动信号也适用于图5b和图5c所示的电路。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (14)

  1. 一种液晶显示面板，包括：
    多条扫描线；
    多条数据线，与所述扫描线配合形成多个间隔区域，每个所述间隔区域内均设置有一像素，
    其中，在显示面板正常显示时，显示区内的所述像素按预定规则分别显示为第一类像素或第二类像素，在相同灰阶信号输入的情况下，所述第一类像素的亮度较高，所述第二类像素的亮度较低。
  2. 根据权利要求1所述的显示面板，其中，在显示面板正常显示时，所述第一类像素和所述第二类像素在纵向和横向均间隔排列。
  3. 根据权利要求1所述的显示面板，其中，在显示面板正常显示时，在相邻两列像素中，一列均为所述第一类像素，另一列为间隔排列的所述第一类像素与所述第二类像素，这样的两列像素在显示面板上间隔交错排列。
  4. 根据权利要求2所述的显示面板，其中，每个所述像素均设置有两个由同一条扫描线控制的TFT，其中一个为充电TFT，用于对该像素充电，另一个为放电TFT，用于对纵向相邻的像素放电。
  5. 根据权利要求3所述的显示面板，其中，在间隔排列所述第一类像素与所述第二类像素的列中，每个像素均设置有两个由同一条扫描线控制的TFT，其中一个为充电TFT，用于对该像素充电，另一个为放电TFT，用于对纵向相邻的像素放电；
    均为所述第一类像素的列中，每个像素均设置有一个充电TFT。
  6. 根据权利要求4所述的显示面板，其中，同一列中具有两个TFT的相邻两个像素为一组，其中每个像素均设置有两个由同一条扫描线控制的TFT，同一组像素中的一个像素的充电TFT与另一个像素的放电TFT连接，且所述放电TFT的一端与公共电极连接。
  7. 根据权利要求6所述的显示面板，其中，所述放电TFT通过耦合电容与公共电极连接。
  8. 根据权利要求6所述的显示面板，其中，当相邻两列像素均具有两个由同一条扫描线控制的TFT时，位于相邻两列像素内且同行设置的两个像素，其中一个与位于同列的上一行的像素视为一组，另一个与位于同列的下一行的像素视为一组。
  9. 根据权利要求6所述的显示面板，其中，所述同一组像素包括位于同列的第一类像素和第二类像素，其中，所述第一类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第一类像素的像素电极 连接；
    所述第一类像素的放电TFT的栅极和与同一组内所述第二类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第一类像素的像素电极及公共电极相连；
    所述第二类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第二类像素的像素电极连接；
    所述第二类像素的放电TFT的栅极和与同一组内所述第一类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第二类像素的像素电极及公共电极相连。
  10. 根据权利要求5所述的显示面板，其中，同一列中具有两个TFT的相邻两个像素为一组，其中每个像素均设置有两个由同一条扫描线控制的TFT，同一组像素中的一个像素的充电TFT与另一个像素的放电TFT连接，且所述放电TFT的一端与公共电极连接。
  11. 根据权利要求10所述的显示面板，其中，所述放电TFT通过耦合电容与公共电极连接。
  12. 根据权利要求10所述的显示面板，其中，当相邻两列像素均具有两个由同一条扫描线控制的TFT时，位于相邻两列像素内且同行设置的两个像素，其中一个与位于同列的上一行的像素视为一组，另一个与位于同列的下一行的像素视为一组。
  13. 根据权利要求10所述的显示面板，其中，所述同一组像素包括位于同列的第一类像素和第二类像素，其中，所述第一类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第一类像素的像素电极连接；
    所述第一类像素的放电TFT的栅极和与同一组内所述第二类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第一类像素的像素电极及公共电极相连；
    所述第二类像素的充电TFT的栅极和与其对应的扫描线连接，所述充电TFT的源极和漏极分别与对应的数据线和同一组内所述第二类像素的像素电极连接；
    所述第二类像素的放电TFT的栅极和与同一组内所述第一类像素对应的扫描线相连，所述放电TFT的源极和漏极分别与所述第二类像素的像素电极及公共电极相连。
  14. 一种用于液晶显示面板的驱动方法，所述液晶显示面板包括：
    多条扫描线；
    多条数据线，与所述扫描线配合形成多个间隔区域，每个所述间隔区域内均设置有一像素，
    其中，在显示面板正常显示时，显示区内的所述像素按预定规则分别显示为第一类像 素或第二类像素，在相同灰阶信号输入的情况下，所述第一类像素的亮度较高，所述第二类像素的亮度较低，
    其中，所述驱动方法包括：在数据线列反转的驱动模式下，连续两帧显示画面扫描线正向开启，连续两帧显示画面扫描线反向开启，使显示区内的所述像素在所述第一类像素和所述第二类像素之间切换，并使得在显示面板正常显示时，第一类像素和第二类像素按预定规则排列。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106683628A (zh) * 2016-12-27 2017-05-17 深圳市华星光电技术有限公司 一种显示面板的扫描线驱动方法及扫描线驱动装置
US10475404B2 (en) 2016-12-27 2019-11-12 Shenzhen China Star Optoelectronics Technology Co., Ltd Driving method of scan lines in display panel and driving device thereof
CN107390442A (zh) * 2017-08-25 2017-11-24 惠科股份有限公司 显示面板及其显示装置
US10714043B2 (en) 2018-09-19 2020-07-14 Chongqing Hkc Optoelectronics Technology Co., Ltd. Display device and liquid crystal display
CN109188749B (zh) * 2018-09-19 2021-02-26 重庆惠科金渝光电科技有限公司 显示装置
CN111968589A (zh) * 2020-08-11 2020-11-20 Tcl华星光电技术有限公司 显示面板的视角补偿方法及显示面板
CN117594023B (zh) * 2023-12-26 2026-02-27 深圳市华星光电半导体显示技术有限公司 显示亮度调节方法、装置、电子设备及存储介质

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040239698A1 (en) * 2003-03-31 2004-12-02 Fujitsu Display Technologies Corporation Image processing method and liquid-crystal display device using the same
US20090009458A1 (en) * 2007-07-04 2009-01-08 Samsung Electronics Co., Ltd. Thin film transistor array panel and display appratus having the same
CN102749751A (zh) * 2011-04-22 2012-10-24 奇美电子股份有限公司 显示面板
CN103576400A (zh) * 2012-07-18 2014-02-12 群康科技(深圳)有限公司 显示器及其驱动方法
CN103777423A (zh) * 2014-01-24 2014-05-07 深圳市华星光电技术有限公司 液晶面板及其像素结构
CN104183221A (zh) * 2013-05-28 2014-12-03 群创光电股份有限公司 液晶显示器及其显示方法
CN104795037A (zh) * 2015-04-29 2015-07-22 深圳市华星光电技术有限公司 一种液晶面板及其驱动方法
CN104900203A (zh) * 2015-06-11 2015-09-09 深圳市华星光电技术有限公司 液晶面板及其驱动方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1267781C (zh) * 1998-03-19 2006-08-02 精工爱普生株式会社 采用开关元件的衬底、液晶和投影型显示装置及电子仪器
EP3229066A1 (en) * 2005-12-05 2017-10-11 Semiconductor Energy Laboratory Co., Ltd. Transflective liquid crystal display with a horizontal electric field configuration
CN103309108B (zh) * 2013-05-30 2016-02-10 京东方科技集团股份有限公司 阵列基板及其制造方法、显示装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040239698A1 (en) * 2003-03-31 2004-12-02 Fujitsu Display Technologies Corporation Image processing method and liquid-crystal display device using the same
US20090009458A1 (en) * 2007-07-04 2009-01-08 Samsung Electronics Co., Ltd. Thin film transistor array panel and display appratus having the same
CN102749751A (zh) * 2011-04-22 2012-10-24 奇美电子股份有限公司 显示面板
CN103576400A (zh) * 2012-07-18 2014-02-12 群康科技(深圳)有限公司 显示器及其驱动方法
CN104183221A (zh) * 2013-05-28 2014-12-03 群创光电股份有限公司 液晶显示器及其显示方法
CN103777423A (zh) * 2014-01-24 2014-05-07 深圳市华星光电技术有限公司 液晶面板及其像素结构
CN104795037A (zh) * 2015-04-29 2015-07-22 深圳市华星光电技术有限公司 一种液晶面板及其驱动方法
CN104900203A (zh) * 2015-06-11 2015-09-09 深圳市华星光电技术有限公司 液晶面板及其驱动方法

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