WO2020073560A1 - Panneau et dispositif d'affichage à cristaux liquides - Google Patents

Panneau et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2020073560A1
WO2020073560A1 PCT/CN2019/072788 CN2019072788W WO2020073560A1 WO 2020073560 A1 WO2020073560 A1 WO 2020073560A1 CN 2019072788 W CN2019072788 W CN 2019072788W WO 2020073560 A1 WO2020073560 A1 WO 2020073560A1
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WO
WIPO (PCT)
Prior art keywords
substrate
liquid crystal
slits
display panel
crystal display
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PCT/CN2019/072788
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English (en)
Chinese (zh)
Inventor
叶成亮
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深圳市华星光电技术有限公司
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Publication of WO2020073560A1 publication Critical patent/WO2020073560A1/fr

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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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement

Definitions

  • the present application relates to a display technology, in particular to a liquid crystal display panel and device.
  • the prior art adopts the pixel structure of 3T_8domain (3 transistors and 8 domains), making slits on the pixel electrodes to make the main (
  • the four domains in the main area and the four domains in the sub area have different arrangement directions of liquid crystal molecules, so as to improve the problem of large-vision role deviation.
  • FIG. 1 shows a schematic circuit diagram of a conventional 3T pixel structure.
  • Each sub-pixel is divided into a main area and a sub-area, and each sub-pixel includes three thin-film transistors, namely a main area TFT, a sub-area TFT, and a shared TFT.
  • the pixel electrodes of the main region and the sub-region have slits (not shown) extending in different directions, so that the main region is divided into 4 domains, and the sub-region is also divided into 4 domains.
  • a scan line is provided for each row of sub-pixels, and a data line is provided for each column of sub-pixels.
  • the main area has a main area capacitance Ca (including liquid crystal capacitance and storage capacitance), and the sub area has a secondary area capacitance Cb (including liquid crystal capacitance and storage capacitance).
  • Each sub-pixel has a common voltage, namely C_Com and A_Com.
  • Figure 2 shows a comparison diagram of the degree of deviation of the Gamma curve, where L1 is the ideal Gamma curve of the display panel, L2 is the Gamma curve of the conventional display panel, and L3 is the Gamma curve of the display panel with a 3T pixel structure. It can be seen that a display panel with a 3T pixel structure can reduce the deviation of the Gamma curve with a large viewing angle and improve the problem of large-vision character deviation.
  • the purpose of this application is to provide a liquid crystal display panel and device to improve the viewing angle performance.
  • liquid crystal display panel including:
  • the second substrate is arranged at a distance from the first substrate
  • a liquid crystal layer disposed between the first substrate and the second substrate, the liquid crystal layer is provided with liquid crystal molecules;
  • a transparent conductive layer is provided on one side of the first substrate and the second substrate facing the other substrate, the transparent conductive layer has transparent electrodes, one transparent electrode corresponds to one sub-pixel with a central horizontal line and The central vertical line is divided into four main areas as a reference.
  • Each main area includes a first area and a second area.
  • Each first area is provided with a number of first gaps extending from the center position to each other, The extension directions of the first slits in different first regions are different.
  • Each second subregion includes several second slits spaced apart from each other.
  • the extension direction of the second slits depends on the The extension direction is inclined at a certain angle, wherein the first slits in different first regions are symmetrically arranged, the second slits in different second regions are symmetrically arranged, and in the same main region, the extension of the second slits
  • the absolute value of the angle difference between the direction and the extending direction of the first slit is less than 5 degrees.
  • the first substrate is a substrate used for a thin film transistor array substrate
  • the second substrate is a substrate used for a color filter substrate.
  • the transparent conductive layer includes a pixel electrode layer having a pixel electrode, and the pixel electrode layer is disposed on the first substrate.
  • the transparent conductive layer includes a common electrode layer having a common electrode, and the common electrode layer is disposed on the second substrate.
  • one sub-pixel corresponds to one transparent electrode divided into the four main regions, and only one thin-film transistor is correspondingly provided.
  • the extending directions of the first slits in the four main regions are 45 degrees, 135 degrees, 225 degrees, and 315 degrees.
  • the first slits in the same first area are arranged in parallel, and the second slits in the same second area are arranged in parallel.
  • this application provides a liquid crystal display panel, including:
  • the second substrate is arranged at a distance from the first substrate
  • a liquid crystal layer disposed between the first substrate and the second substrate, the liquid crystal layer is provided with liquid crystal molecules;
  • a transparent conductive layer is provided on one side of the first substrate and the second substrate facing the other substrate, the transparent conductive layer has transparent electrodes, one transparent electrode corresponds to one sub-pixel with a central horizontal line and The central vertical line is divided into four main areas as a reference.
  • Each main area includes a first area and a second area.
  • Each first area is provided with a number of first gaps extending from the center position to each other, The extension directions of the first slits in different first regions are different.
  • Each second subregion includes several second slits spaced apart from each other. In the same main region, the extension direction of the second slits depends on the The extension direction is inclined at a certain angle.
  • the first substrate is a substrate used for a thin film transistor array substrate
  • the second substrate is a substrate used for a color filter substrate.
  • the transparent conductive layer includes a pixel electrode layer having a pixel electrode, and the pixel electrode layer is disposed on the first substrate.
  • the transparent conductive layer includes a common electrode layer having a common electrode, and the common electrode layer is disposed on the second substrate.
  • one sub-pixel corresponds to one transparent electrode divided into the four main regions, and only one thin-film transistor is correspondingly provided.
  • the extending directions of the first slits in the four main regions are 45 degrees, 135 degrees, 225 degrees, and 315 degrees.
  • the first slits in different first-time regions are arranged symmetrically, and the second slits in different second-time regions are arranged symmetrically.
  • the first slits in the same first area are arranged in parallel, and the second slits in the same second area are arranged in parallel.
  • the absolute value of the angle difference between the extension direction of the second slit and the extension direction of the first slit is less than 5 degrees.
  • An aspect of the present application provides a liquid crystal display device, including:
  • the liquid crystal display panel includes:
  • the second substrate is arranged at a distance from the first substrate
  • a liquid crystal layer disposed between the first substrate and the second substrate, the liquid crystal layer is provided with liquid crystal molecules;
  • a transparent conductive layer is provided on one side of the first substrate and the second substrate facing the other substrate, the transparent conductive layer has transparent electrodes, one transparent electrode corresponds to one sub-pixel with a central horizontal line and The central vertical line is divided into four main areas as a reference.
  • Each main area includes a first area and a second area.
  • Each first area is provided with a number of first gaps extending from the center position to each other, The extension directions of the first slits in different first regions are different.
  • Each second subregion includes several second slits spaced apart from each other. In the same main region, the extension direction of the second slits depends on the The extension direction is inclined at a certain angle.
  • one transparent electrode is divided into four main regions corresponding to one sub-pixel, each main region includes a first region and a second region, and each first region is provided with a first slit, each A second slit is provided in the second sub-region, and the extending direction of the second slit is inclined at a certain angle according to the extending direction of the first slit.
  • this application does not need to divide the sub-pixels into two display blocks, but by setting a second slit, it can increase the horizontal viewing angle of the side view and improve the large-vision role deviation The problem.
  • Another aspect of the present application is that each sub-pixel uses only one thin film transistor. Compared with the existing 3T pixel structure, the present application improves the viewing angle performance under reduced driving complexity.
  • FIG. 1 shows a schematic circuit diagram of a conventional 3T pixel structure.
  • FIG. 2 shows the comparison of the degree of deviation of the Gamma curve
  • FIG. 3 shows a schematic diagram of a liquid crystal display panel according to an embodiment of the present application.
  • FIG. 4 shows a schematic diagram of a transparent electrode corresponding to one sub-pixel according to an embodiment of the present application.
  • FIG. 5 shows a schematic diagram of a liquid crystal display device according to an embodiment of the present application.
  • FIG. 3 shows a schematic diagram of a liquid crystal display panel 3 according to an embodiment of the present application.
  • the liquid crystal display panel 3 includes a first substrate 10, a second substrate 20 and a liquid crystal layer 30.
  • the first substrate 10 and the second substrate 20 are at a distance.
  • the liquid crystal layer 30 is disposed between the first substrate 10 and the second substrate 20, and the liquid crystal layer 30 is provided with liquid crystal molecules.
  • the first substrate 10 is a thin-film transistor (TFT) array substrate
  • the second substrate 20 is a color filter substrate.
  • the materials of these substrates can be glass, plastic, or these. The combination.
  • the liquid crystal display panel 3 further includes a transparent conductive layer having transparent electrodes, and one of the first substrate 10 and the second substrate 20 is disposed on a side of the other substrate.
  • the transparent electrode layer is made of, for example, indium tin oxide (ITO).
  • the transparent conductive layer may be a pixel electrode layer 11 having a pixel electrode.
  • the pixel electrode layer 11 is disposed on the side of the first substrate 10 facing the second substrate 20.
  • the pixel electrode is used to receive the data voltage, so that the liquid crystal molecules in the liquid crystal layer 30 are deflected according to the magnitude of the data voltage.
  • the transparent conductive layer may be a common electrode layer 21 having a common electrode.
  • the common electrode layer 21 is disposed on the side of the second substrate 20 facing the first substrate 10, so The common electrode is used to provide a common voltage.
  • FIG. 4 shows a schematic diagram of a transparent electrode corresponding to one sub-pixel according to an embodiment of the present application. Please refer to FIG. 3 and FIG. 4 at the same time.
  • the transparent electrode shown in FIG. 4 can be realized by the pixel electrode of the pixel electrode layer 11 or by the common electrode of the common electrode layer 21. That is to say, the structure improvement of the transparent electrode of the present application can be applied to any one of the pixel electrode and the common electrode, that is, the purpose of changing the arrangement direction of the liquid crystal molecules and improving the viewing angle of the panel can be achieved.
  • a sub-pixel refers to a sub-pixel corresponding to a color channel, such as a red sub-pixel, a blue sub-pixel, and a green sub-pixel.
  • the pixel structure is only one display block.
  • one sub-pixel corresponds to one transparent electrode, and only one thin-film transistor is provided.
  • the main area and the partition of each sub-pixel need to be controlled by partitions.
  • each sub-pixel uses only one thin film transistor, which reduces driving complexity.
  • one transparent electrode corresponds to one sub-pixel and is divided into four main regions, namely R1, R2, R3, and R4, based on the central horizontal line 40a and the central vertical line 40b.
  • Each main area includes a first area and a second area, for example, the main area R1 includes the first area 42a and the second area 44a, the main area R2 includes the first area 42b and the second area 44b, the main area R3 includes the first and second regions 42c and 44c, and the main region R4 includes the first and second regions 42d and 44d.
  • Each first area is provided with several first slits 45
  • each second area is provided with several second slits 47.
  • the first slit 45 and the second slit 47 are formed by patterning a transparent conductive layer.
  • the first slits 45 extend outward from the center position and are spaced apart from each other. As shown in FIG. 4, the extending directions of the first slits 45 in different first regions are different. For example, the extending direction of the first slit 45 in the first region 42a is 135 degrees, the extending direction of the first slit 45 in the first region 42b is 45 degrees, and the direction of the first slit 45 in the first region 42c The extending direction is 225 degrees, and the extending direction of the first slit 45 in the first region 42d is 315 degrees. The first slits 45 in different first-regions are arranged symmetrically.
  • first slits 45 in the first-region 42a and the first slits 45 in the first-region 42b are arranged symmetrically with respect to the central vertical line 40b.
  • the first slits 45 in the same first area are arranged in parallel, for example, the first slits 45 in the first area 42a are arranged in parallel.
  • the second slits 47 are spaced from each other.
  • the second slits 47 in different second secondary regions are arranged symmetrically, for example, the second slits 47 in the second secondary region 44a and the second slits 47 in the second secondary region 44b are arranged symmetrically with respect to the central vertical line 40b.
  • the second slits 47 in the same second sub-region are arranged in parallel, for example, the second slits 47 in the second sub-region 44a are arranged in parallel.
  • the extending direction of the second slit 47 of the second secondary region is inclined at a certain angle according to the extending direction of the first slit 45 of the first secondary region.
  • the second slit 47 extends obliquely with respect to the first slit 45 toward the central horizontal line 40a. That is, in each main area, the inclination angle of the second slit 47 with respect to the central horizontal line 40a is smaller than the inclination angle of the first slit 45 with respect to the central horizontal line 40a.
  • the absolute value of the angle difference between the extension direction of the second slit and the extension direction of the first slit is less than 5 degrees. This preferred embodiment can increase the lateral viewing angle in the horizontal direction, and effectively improve the problem of large-vision role deviation in the horizontal direction.
  • Tr is the penetration rate
  • n is the difference between the refractive index of the liquid crystal molecules in the vertical and horizontal deflection directions
  • d is the height of the liquid crystal layer
  • ⁇ is the wavelength of light.
  • ⁇ nd is a fixed value and ⁇ is also a fixed value.
  • the inclination angle of the second slit 47 with respect to the central horizontal line 40a is smaller than the inclination angle of the first slit 45 with respect to the central horizontal line 40a.
  • the setting of the second slit 47 reduces the overall penetration rate, but the horizontal viewing angle in the horizontal direction is improved. That is to say, the second slit 47 is provided in this application to sacrifice a part of the penetration rate to increase the horizontal viewing angle in the horizontal direction, so as to improve the viewing angle performance of a large-size display panel, for example.
  • FIG. 5 shows a schematic diagram of a liquid crystal display device 5 according to an embodiment of the present application.
  • the liquid crystal display device 5 includes a liquid crystal display panel 3 and a backlight module 4.
  • the backlight module 4 is provided corresponding to the liquid crystal display panel 3. Please refer to FIGS. 3 to 5 at the same time.
  • the LCD panel 3 includes:
  • the second substrate 20 is arranged at a distance from the first substrate 10;
  • the liquid crystal layer 30 is disposed between the first substrate 10 and the second substrate 20, and the liquid crystal layer 30 is provided with liquid crystal molecules;
  • liquid crystal display device 5 The specific details of the liquid crystal display device 5 can refer to the above description, and will not be repeated here.
  • one transparent electrode is divided into four main areas corresponding to one sub-pixel, each main area includes a first area and a second area, and each first area is provided with a first slit 45, Each second subregion is provided with a second slit 47, and the extending direction of the second slit 47 is inclined at a certain angle according to the extending direction of the first slit 45.
  • this application does not need to divide the sub-pixel into two display blocks, but by setting the second slit 47, the horizontal viewing angle in the horizontal direction can be improved, and the role of big vision can be improved. Partial problem.
  • Another aspect of the present application is that each sub-pixel uses only one thin film transistor. Compared with the existing 3T pixel structure, the present application improves the viewing angle performance under reduced driving complexity.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Geometry (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un panneau d'affichage à cristaux liquides (3) et un dispositif (5). Le panneau d'affichage (3) comprend un premier substrat (10) ; un second substrat (20) ; une couche de cristaux liquides (30) configurée entre le premier substrat (10) et le second substrat (20) ; et une couche conductrice transparente (11, 21) disposée sur un côté de l'un du premier substrat (10) et du second substrat (20) faisant face à l'autre substrat. La couche conductrice transparente (11, 21) possède des électrodes transparentes. Une électrode transparente correspond à un sous-pixel et est divisée en quatre régions principales (R1, R2, R3, R4). Chaque région principale (R1, R2, R3, R4) comprend des premières sous-régions (42a, 42b, 42c, 42d) et des secondes sous-régions (44a, 44b, 44c, 44d). Chaque première sous-région (42a, 42b, 42c, 42d) comprend une pluralité de premiers espaces (45). Chaque seconde sous-région (44a, 44b, 44c, 44d) comprend une pluralité de seconds espaces (47). Dans la même région principale (R1, R2, R3, R4), la direction d'extension des seconds espaces (47) est inclinée selon un certain angle en fonction de la direction d'extension des premiers espaces (45). Grâce au panneau (3) et au dispositif (5) d'affichage, par le réglage des seconds espaces (47), les performances du panneau peuvent être améliorées.
PCT/CN2019/072788 2018-10-10 2019-01-23 Panneau et dispositif d'affichage à cristaux liquides WO2020073560A1 (fr)

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CN201811177549.2 2018-10-10
CN201811177549.2A CN109212844A (zh) 2018-10-10 2018-10-10 液晶显示面板及装置

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Publication number Priority date Publication date Assignee Title
CN109212844A (zh) * 2018-10-10 2019-01-15 深圳市华星光电技术有限公司 液晶显示面板及装置
WO2021114382A1 (fr) * 2019-12-11 2021-06-17 Tcl华星光电技术有限公司 Substrat de réseau et écran d'affichage

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CN202150002U (zh) * 2011-07-07 2012-02-22 深圳市华星光电技术有限公司 像素电极结构
US9804446B2 (en) * 2015-01-22 2017-10-31 Samsung Display Co., Ltd. Liquid crystal display
CN105223736A (zh) * 2015-09-09 2016-01-06 友达光电股份有限公司 显示面板
US20170235195A1 (en) * 2016-02-17 2017-08-17 Samsung Display Co. Ltd. Liquid-crystal display device
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