CN113495381A - Black-white display panel, double-layer liquid crystal display panel and double-layer liquid crystal display device - Google Patents

Black-white display panel, double-layer liquid crystal display panel and double-layer liquid crystal display device Download PDF

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Publication number
CN113495381A
CN113495381A CN202010194158.2A CN202010194158A CN113495381A CN 113495381 A CN113495381 A CN 113495381A CN 202010194158 A CN202010194158 A CN 202010194158A CN 113495381 A CN113495381 A CN 113495381A
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polarizing plate
liquid crystal
display panel
black
plate
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陈忠国
梁靖靖
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Xianyang Caihong Optoelectronics Technology Co Ltd
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Xianyang Caihong Optoelectronics Technology Co Ltd
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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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells

Abstract

The invention discloses a black-and-white display panel, a double-layer liquid crystal display panel and a double-layer liquid crystal display device. The black-and-white display panel includes: a polarizing plate system including a first lower polarizing plate and a first upper polarizing plate; a first liquid crystal cell located between the first lower polarizing plate and the first upper polarizing plate, and including a first lower substrate, a first liquid crystal layer, and a first upper substrate; the polarizing plate system is provided with a circular polarizing plate, the first upper polarizing plate is positioned on the first upper substrate, the first upper substrate is positioned on the first liquid crystal layer, the first liquid crystal layer is positioned on the first lower substrate, and the first lower substrate is provided with a pixel electrode structure. The invention uses the circular polarizing plate to replace the linear polarizing plate in the polarizing plate system of the black-and-white display panel to improve the transmittance of the first display panel; and the design of the pixel electrode structure is optimized, so that the integral penetration rate of the display is improved.

Description

Black-white display panel, double-layer liquid crystal display panel and double-layer liquid crystal display device
Technical Field
The invention belongs to the technical field of display, and particularly relates to a black-and-white display panel, a double-layer liquid crystal display panel and a double-layer liquid crystal display device.
Background
With the development of Display technology, flat panel Display devices such as Liquid Crystal Displays (LCDs) have advantages of high image quality, power saving, thin body, and wide application range, and are therefore widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a single-layer Liquid Crystal Display provided in the prior art, where the single-layer Liquid Crystal Display shown in fig. 1 is a common LCD (Liquid Crystal Display) screen at present, and due to the structural design of the single-layer Liquid Crystal Display, the single-layer Liquid Crystal Display cannot realize a high-contrast picture. Referring to fig. 2, fig. 2 is a schematic structural diagram of a Dual-layer liquid crystal display panel provided in the prior art, in order to improve a dynamic contrast range of the liquid crystal display panel, that is, to make the bright area bright enough and the dark area dark enough, the Dual-layer liquid crystal display panel shown in fig. 2 is prepared by using a Dual-panel (Dual Cell) technology, in which a conventional backlight source emits a light beam with uniform brightness to illuminate a local dimming (MONO) liquid crystal panel, local dimming is implemented by controlling a deflection angle of liquid crystal molecules in the local dimming liquid crystal panel, and the light beam after the local dimming of the liquid crystal panel illuminates a display (COLOR) liquid crystal panel and projects a final image to a user. Referring to fig. 3, fig. 3 is a schematic structural diagram of another dual-layer lcd Panel provided in the prior art, in which the black-and-white dimming Panel (i.e., the first Panel) in fig. 3 serves as an auxiliary display Panel to perform black-and-white dimming, the black-and-white dimming Panel is composed of a 1 st lower polarizer, a 1 st lower substrate, a 1 st liquid crystal layer, a 1 st upper substrate, and a 1 st upper polarizer, the color display Panel (i.e., the second Panel) in fig. 3 serves as a main display Panel to perform color display, and a diffusion plate for eliminating MOIRE is disposed between the black-and-white dimming Panel and the second Panel.
However, the light source having such a structure is emitted from a backlight, and then sequentially passes through the monochrome light control panel, the diffusion plate, and the color display panel, and then passes through the multilayer structure, so that the overall light extraction efficiency is reduced.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a black-and-white display panel, a dual-layer liquid crystal display panel and a dual-layer liquid crystal display device. The technical problem to be solved by the invention is realized by the following technical scheme:
a black and white display panel comprising:
a polarizing plate system including a first lower polarizing plate and a first upper polarizing plate;
a first liquid crystal cell located between the first lower polarizing plate and the first upper polarizing plate, and including a first lower substrate, a first liquid crystal layer, and a first upper substrate;
wherein the content of the first and second substances,
the polarizing plate system is provided with a circular polarizing plate;
the first upper polarizer is located on the first upper substrate.
The first upper substrate is positioned on the first liquid crystal layer;
the first liquid crystal layer is positioned on the first lower substrate;
and a pixel electrode structure is arranged on the first lower substrate.
In one embodiment of the present invention, the polarizing plate system has three polarizing plates;
wherein the content of the first and second substances,
the first lower polarizing plate is a first lower circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the first upper polarizing plate includes a lambda/4 wave plate;
the lambda/4 wave plate is perpendicular to the lambda/4 wave plate of the first lower circular polarizing plate.
In one embodiment of the present invention, the polarizing plate system has four polarizing plates;
wherein the content of the first and second substances,
the first lower polarizing plate is a first lower circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the first upper polarizing plate is a first upper circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the optical axis direction of the lambda/4 wave plate and the linear polarization plate forms an included angle of 45 degrees.
In one embodiment of the present invention, the panel is in MVA display mode;
the pixel electrode structure is a slit electrode structure;
the slit electrode structure includes: a four-domain zigzag structure and a two-domain zigzag structure.
In one embodiment of the invention, the electrode structure is a rectangular electrode structure;
the rectangular structure is used for the liquid crystal molecules to be autonomously arranged in a smaller range to form a multi-domain;
the rectangle is of a square structure;
the square structure has a chamfer.
In one embodiment of the invention, the central region of the slit electrode structure is arranged as a multi-axial symmetric structure;
the multi-axial symmetric structure includes: square structures, regular polygon structures and circular structures.
An embodiment of the present invention also provides a dual-layer liquid crystal display panel including:
the black-and-white display panel of any one of the preceding;
the diffusion plate is arranged on the black-and-white display panel;
and the color display panel is arranged on the diffusion plate.
In one embodiment of the present invention, the color display panel is in an MVA, IPS or FFS display mode with four or more domains; the method comprises the following steps:
a second lower polarizing plate on the diffusion plate;
the second lower substrate is positioned on the second lower light plate;
a second liquid crystal layer on the second lower substrate;
a second upper substrate on the second liquid crystal layer;
and the second upper polarizing plate is positioned on the second upper substrate.
In an embodiment of the invention, the display panel further includes a first glue layer and a second glue layer, the first glue layer is disposed between the black-and-white display panel and the diffusion plate, and the second glue layer is disposed between the diffusion plate and the color display panel.
In one embodiment of the present invention, the first glue layer and the second glue layer each comprise optical glue (OCA).
An embodiment of the present invention further provides a dual-layer liquid crystal display device, including the dual-layer liquid crystal display panel according to any one of the above embodiments;
the display panel may be any one of a VA mode, an IPS mode, and a TN mode.
The invention has the beneficial effects that:
the invention uses the circular polarizing plate to replace the linear polarizing plate in the polarizing plate system of the black-and-white display panel which is used as an auxiliary display screen to play a role in black-and-white dimming to improve the transmittance of the first display panel, in particular to a mode of combining two polarizing plates of four polarizing plate systems and three polarizing plate systems; on the basis of using the circular polarizing plate, the design of the pixel electrode structure also uses a square electrode structure besides a common Slit electrode (Slit) structure, and particularly arranges a square electrode in a 4-Domain (Domain) central area to further improve the penetration rate of the central area, thereby improving the integral penetration rate of the display.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural view of a single-layer liquid crystal display panel provided in the prior art;
fig. 2 is a schematic structural view of a dual-layer liquid crystal display panel provided in the prior art;
fig. 3 is a schematic structural view of another dual-layer liquid crystal display panel provided in the prior art;
fig. 4 is a schematic structural diagram of a black-and-white display panel according to an embodiment of the present invention;
FIG. 5a is a schematic view of an arrangement of four circular polarizers according to an embodiment of the present invention;
FIG. 5b is a schematic diagram illustrating an arrangement of three circular polarizers according to an embodiment of the present invention;
FIG. 5c is a schematic structural diagram of a 4-domain slit electrode according to an embodiment of the present invention;
FIG. 5d is a schematic structural diagram of a 2-domain slit electrode according to an embodiment of the present invention;
fig. 5e is a schematic structural diagram of a square electrode according to an embodiment of the present invention;
fig. 5f is a schematic diagram of transmittance of a linear polarizer corresponding to a square electrode structure according to an embodiment of the present invention;
fig. 5g is a schematic diagram of transmittance of a circular polarizer corresponding to a square electrode structure according to an embodiment of the present invention;
fig. 5h is a schematic structural diagram of a novel slit electrode according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a dual-layer lcd panel according to an embodiment of the present invention;
description of reference numerals:
a black-and-white display panel-10; a diffuser plate-20; a color display panel-30; a first glue layer-40; a second glue layer-50; a first lower polarizing plate-101; a liquid crystal box-102 consisting of a first lower substrate, a first liquid crystal layer and a first upper substrate; a first upper polarizer-103; a second lower polarizing plate-301; a second lower substrate-302; a second liquid crystal layer-303; a second upper substrate-304; a second upper polarizer-305.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Currently, double-layer liquid crystal display panels manufactured by the Dual Cell technology are receiving more and more attention due to their high contrast. Referring to fig. 3, a black-and-white dimming panel for black-and-white dimming, a diffusion plate for removing moire fringes, and a color display panel for color display are generally disposed in a dual-layer lcd at present, so that a light source emitted from a backlight needs to sequentially pass through the black-and-white dimming panel, the diffusion plate, and the color display panel, but the loss of the light source is increased as the number of structural layers passed by the light source is increased, and finally, the light extraction efficiency is reduced.
In order to improve the overall light emitting efficiency of the dual-layer lcd, the light emitting efficiency of the black-and-white display panel 10 can be improved first considering that the black-and-white display panel is only used for adjusting the brightness. In a vertically orthogonal polarizer system, the emergent light is related to the azimuthal angle of the liquid crystal, and is the largest (strong) when the azimuthal angle of the liquid crystal is 45 °; when the emergent light after the circular polarizing plate (circular polarizing plate) is used, the emergent light is irrelevant to the liquid crystal azimuth angle, so that the influence of the liquid crystal azimuth angle on the emergent light is eliminated, and the integral light-emitting rate is increased; under the same external voltage, the transmittance of the circular polarizing plate system is about 1.5-3 times that of the linear polarizing plate system; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a black-and-white display panel according to an embodiment of the present invention. The embodiment provides a black-and-white display panel 10 for black-and-white dimming, the black-and-white display panel 10 includes a polarizer system composed of a first lower polarizer 101 and a first upper polarizer 103, and a first liquid crystal cell 102 composed of a first lower substrate, a first liquid crystal layer and a first upper substrate, wherein the first liquid crystal cell 102 is located on the first lower polarizer 101, and the first upper polarizer 103 is located on the first liquid crystal cell 102; wherein, the polarizer system is provided with a circular polarizer; the first upper substrate is positioned on the first liquid crystal layer, the first liquid crystal layer is positioned on the first lower substrate, and the first lower substrate is provided with a pixel electrode structure.
Further, referring to fig. 5b, fig. 5b is a schematic diagram illustrating an arrangement manner of a circular polarizer with three polarizers according to an embodiment of the present invention; specifically, the polarizing plate system in the present embodiment has four polarizing plates: the first lower polarizing plate 101 is a first lower circular polarizing plate, and includes a λ/4 wave plate and a linear polarization plate, which collectively include two polarizing plates; the first upper polarizing plate 103 includes a λ/4 wave plate; wherein the lambda/4 wave plate is perpendicular to the lambda/4 wave plate of the first lower circular polarizing plate. Thereby eliminating the influence of the liquid crystal azimuth angle on emergent light and increasing the integral light-emitting rate; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Further, for example, when the black-and-white display panel is in an MVA display mode and the electrode structure is a Slit (Slit) electrode structure, the effects of the present invention can be also achieved; and the slit electrode structure may include: a four-domain zigzag structure and a two-domain zigzag structure. Referring to fig. 5c, fig. 5c is a schematic structural view of a 4-domain zigzag slit electrode provided in this embodiment, and fig. 5d is a schematic structural view of a 2-domain zigzag slit electrode provided in this embodiment.
Further, fig. 5e is a schematic diagram of a square electrode structure provided in the embodiment of the present invention, fig. 5f is a schematic diagram of the transmittance of a linear polarizer corresponding to the square electrode structure provided in the embodiment of the present invention, and fig. 5g is a schematic diagram of the transmittance of a circular polarizer corresponding to the square electrode structure provided in the embodiment of the present invention; in this embodiment, on the basis of using the circular polarizer system, a square electrode as shown in fig. 5e may be used, and the square structure may be provided with a chamfer; the liquid crystal molecules are arranged in a smaller rectangular range to form a plurality of domains, and the penetration rate of the liquid crystal molecules matched with the pixel electrode structure design and the linear polarizer shows a simulation effect as shown in figure 5 f; the transmittance of the system matched with the circularly polarizing plate shows the simulation effect as shown in FIG. 5 g.
Furthermore, besides the design of the square electrode, the penetration rate can be further improved by combining the design of the Slit; as shown in fig. 5h, fig. 5h is a schematic view of a novel slit electrode structure provided in the present embodiment, a central area of the slit electrode structure is set to be a multi-axial symmetric structure, such as a square structure, a regular polygon structure, or a circular structure, and compared with a conventional 4-domain design, the central penetration rate is improved, so that the overall penetration rate is improved, and the final display effect is optimized.
The first lower substrate and the first upper substrate may be made of a semiconductor material such as glass or quartz, or an organic polymer.
It should be noted that the black-and-white display panel 10 for black-and-white dimming provided in this embodiment can be applied to not only a dual-layer liquid crystal display, but also other liquid crystal displays for black-and-white dimming using the black-and-white display panel 10, and this embodiment is not limited in this respect.
In addition, the display screen of the black-and-white display panel 10 to which the present embodiment is applied belongs to the common general knowledge in the art except for the black-and-white display panel 10, and the preparation and the position thereof are the same as the conventional manner in the art, so the present embodiment will not be described in detail with respect to other structures.
In the present embodiment, a circular polarizing plate is used in place of a linear polarizing plate in a polarizing plate system of a black-and-white display panel that serves as an auxiliary display screen to improve the transmittance of the first display panel, particularly, by combining two polarizing plates of three polarizing plate systems; on the basis of using the circular polarizing plate, the design of the pixel electrode structure also uses a square electrode structure besides a common Slit electrode (Slit) structure, and particularly arranges a square electrode in a 4-Domain (Domain) central area to further improve the penetration rate of the central area, thereby improving the penetration rate of the black-and-white display panel.
Example two
As can be seen from the related content of the first embodiment, the emergent light after using the circularly polarizing plate (circularly polarizing plate) is independent of the liquid crystal azimuth, so that the influence of the liquid crystal azimuth on the emergent light is eliminated, and the overall light-emitting rate is increased; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a black-and-white display panel according to an embodiment of the present invention. Therefore, in order to ensure high contrast and improve the light extraction efficiency of the dual-layer liquid crystal display, the present embodiment provides a black-and-white display panel 10 for black-and-white dimming, the black-and-white display panel 10 includes a polarizer system composed of a first lower polarizer 101 and a first upper polarizer 103, and a first liquid crystal cell 102 composed of a first lower substrate, a first liquid crystal layer, and a first upper substrate, wherein the first liquid crystal cell 102 is located on the first lower polarizer 101, and the first upper polarizer 103 is located on the first liquid crystal cell 102; wherein, the polarizer system is provided with a circular polarizer; the first upper substrate is positioned on the first liquid crystal layer, the first liquid crystal layer is positioned on the first lower substrate, and a pixel electrode structure is arranged on the first lower substrate; the structure can improve the light emitting efficiency.
Specifically, in the vertically orthogonal polarizing plate system, the outgoing light is related to the azimuth angle of the liquid crystal, and the outgoing light is maximum (strong) when the azimuth angle of the liquid crystal is 45 °; when the emergent light after the circular polarizing plate (circular polarizing plate) is used, the emergent light is irrelevant to the liquid crystal azimuth angle, so that the influence of the liquid crystal azimuth angle on the emergent light is eliminated, and the integral light-emitting rate is increased; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Further, referring to fig. 5a, fig. 5a is a schematic view illustrating an arrangement manner of a circular polarizer with four polarizers according to an embodiment of the present invention; specifically, the polarizing plate system in the present embodiment has four polarizing plates; the first lower polarizer 101 is a first lower circular polarizer, and includes a λ/4 wave plate and a linear polarization plate; the first upper polarizing plate 103 is a first upper circular polarizing plate including a λ/4 wave plate and a linear polarization plate; wherein the optical axis direction of the lambda/4 wave plate and the linear polarization plate forms an included angle of 45 degrees; thereby eliminating the influence of the liquid crystal azimuth angle on emergent light and increasing the integral light-emitting rate; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Further, for example, when the black-and-white display panel is in an MVA display mode and the electrode structure is a Slit (Slit) electrode structure, the effects of the present invention can be also achieved; and the slit electrode structure may include: a four-domain zigzag structure and a two-domain zigzag structure. Referring to fig. 5c, fig. 5c is a schematic structural view of a 4-domain zigzag slit electrode provided in this embodiment, and fig. 5d is a schematic structural view of a 2-domain zigzag slit electrode provided in this embodiment;
further, fig. 5e is a schematic diagram of a square electrode structure provided in the embodiment of the present invention, fig. 5f is a schematic diagram of the transmittance of a linear polarizer corresponding to the square electrode structure provided in the embodiment of the present invention, and fig. 5g is a schematic diagram of the transmittance of a circular polarizer corresponding to the square electrode structure provided in the embodiment of the present invention; in this embodiment, on the basis of using the circular polarizer system, a square electrode as shown in fig. 5e may be used, and the square structure may be provided with a chamfer; the liquid crystal molecules are arranged in a smaller rectangular range to form a plurality of domains, and the penetration rate of the liquid crystal molecules matched with the pixel electrode structure design and the linear polarizer shows a simulation effect as shown in figure 5 f; the transmittance of the system matched with the circularly polarizing plate shows the simulation effect as shown in FIG. 5 g.
Furthermore, besides the design of the square electrode, the penetration rate can be further improved by combining the design of the Slit; as shown in fig. 5h, fig. 5h is a schematic view of a novel slit electrode structure provided in the present embodiment, a central area of the slit electrode structure is set to be a multi-axial symmetric structure, such as a square structure, a regular polygon structure, or a circular structure, and compared with a conventional 4-domain design, the central penetration rate is improved, so that the overall penetration rate is improved, and the final display effect is optimized.
The first lower substrate and the first upper substrate may be made of a semiconductor material such as glass or quartz, or an organic polymer.
It should be noted that the black-and-white display panel 10 for black-and-white dimming provided in this embodiment can be applied to not only a dual-layer liquid crystal display, but also other liquid crystal displays for black-and-white dimming using the black-and-white display panel 10, and this embodiment is not limited in this respect.
In addition, the display screen of the black-and-white display panel 10 to which the present embodiment is applied belongs to the common general knowledge in the art except for the black-and-white display panel 10, and the preparation and the position thereof are the same as the conventional manner in the art, so the present embodiment will not be described in detail with respect to other structures.
In the embodiment, a circular polarizing plate is used in place of a linear polarizing plate in a polarizing plate system of a black-and-white display panel which plays a role in black-and-white dimming as an auxiliary display screen to improve the transmittance of the first display panel, particularly in a four-polarizing plate system mode; on the basis of using the circular polarizing plate, the design of the pixel electrode structure also uses a square electrode structure besides a common Slit electrode (Slit) structure, and particularly arranges a square electrode in a 4-Domain (Domain) central area to further improve the penetration rate of the central area, thereby improving the penetration rate of the black-and-white display panel.
EXAMPLE III
Referring to fig. 6, fig. 6 is a schematic structural diagram of a dual-layer liquid crystal display substrate according to an embodiment of the invention. The present invention provides a double-layer liquid crystal display substrate based on the above embodiments, the double-layer liquid crystal display substrate includes a black-and-white display panel 10, a diffusion plate 20 and a color display panel 30, wherein the diffusion plate 20 is disposed on the black-and-white display panel 10, and the color display panel 30 is disposed on the diffusion plate 20, wherein the black-and-white display panel 10 serves as an auxiliary display of the double-layer liquid crystal display substrate to perform black-and-white dimming, the diffusion plate 20 serves to eliminate moire fringes, and the color display panel 30 serves as a main display of the double-layer liquid crystal display substrate to perform color display.
Referring to fig. 4 again, fig. 4 is a schematic structural diagram of a black-and-white display panel according to an embodiment of the present invention. One embodiment provides a black-and-white display panel 10 for black-and-white dimming, the black-and-white display panel 10 includes a polarizer system composed of a first lower polarizer 101 and a first upper polarizer 103, and a first liquid crystal cell 102 composed of a first lower substrate, a first liquid crystal layer and a first upper substrate, wherein the first liquid crystal cell 102 is located on the first lower polarizer 101, and the first upper polarizer 103 is located on the first liquid crystal cell 102; wherein, the polarizer system is provided with a circular polarizer; the first upper substrate is positioned on the first liquid crystal layer, the first liquid crystal layer is positioned on the first lower substrate, and the first lower substrate is provided with a pixel electrode structure.
Specifically, in the vertically orthogonal polarizing plate system, the outgoing light is related to the azimuth angle of the liquid crystal, and the outgoing light is maximum (strong) when the azimuth angle of the liquid crystal is 45 °; when the emergent light after the circular polarizing plate (circular polarizing plate) is used, the emergent light is irrelevant to the liquid crystal azimuth angle, so that the influence of the liquid crystal azimuth angle on the emergent light is eliminated, and the integral light-emitting rate is increased; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
In an embodiment, please refer to fig. 5b, wherein fig. 5b is a schematic diagram illustrating an arrangement manner of a circular polarizer having three polarizers according to an embodiment of the present invention; specifically, the polarizing plate system in the present embodiment has four polarizing plates: the first lower polarizing plate 101 is a first lower circular polarizing plate, and includes a λ/4 wave plate and a linear polarization plate, which collectively include two polarizing plates; the first upper polarizing plate 103 includes a λ/4 wave plate; the optical axis direction of the lambda/4 wave plate and the linear polarization plate forms an included angle of 45 degrees. Thereby eliminating the influence of the liquid crystal azimuth angle on emergent light and increasing the integral light-emitting rate; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
In another embodiment, please refer to fig. 5a, fig. 5a is a schematic view illustrating an arrangement manner of a circular polarizer with four polarizers according to an embodiment of the present invention; specifically, the polarizing plate system in the present embodiment has four polarizing plates; the first lower polarizer 101 is a first lower circular polarizer, and includes a λ/4 wave plate and a linear polarization plate; the first upper polarizing plate 103 is a first upper circular polarizing plate including a λ/4 wave plate and a linear polarization plate; wherein the optical axis direction of the lambda/4 wave plate and the linear polarization plate forms an included angle of 45 degrees; thereby eliminating the influence of the liquid crystal azimuth angle on emergent light and increasing the integral light-emitting rate; finally, the purpose of improving the whole light emitting efficiency of the double-layer liquid crystal display screen is achieved.
Further, on the basis of using any one of the above circular polarizing plate systems, for example, when the black-and-white display panel is in an MVA display mode and the electrode structure is a Slit (Slit) electrode structure, the effects of the present invention can also be achieved; and the slit electrode structure may include: a four-domain zigzag structure and a two-domain zigzag structure. Referring to fig. 5c, fig. 5c is a schematic structural view of a 4-domain zigzag slit electrode provided in this embodiment, and fig. 5d is a schematic structural view of a 2-domain zigzag slit electrode provided in this embodiment;
further, fig. 5e is a schematic diagram of a square electrode structure provided in the embodiment of the present invention, fig. 5f is a schematic diagram of the transmittance of a linear polarizer corresponding to the square electrode structure provided in the embodiment of the present invention, and fig. 5g is a schematic diagram of the transmittance of a circular polarizer corresponding to the square electrode structure provided in the embodiment of the present invention; in this embodiment, on the basis of using the circular polarizer system, a square electrode as shown in fig. 5e may be used, and the square structure may be provided with a chamfer; the liquid crystal molecules are arranged in a smaller rectangular range to form a plurality of domains, and the penetration rate of the liquid crystal molecules matched with the pixel electrode structure design and the linear polarizer shows a simulation effect as shown in figure 5 f; the transmittance of the system matched with the circularly polarizing plate shows the simulation effect as shown in FIG. 5 g.
Furthermore, besides the design of the square electrode, the penetration rate can be further improved by combining the design of the Slit; as shown in fig. 5h, fig. 5h is a schematic view of a novel slit electrode structure provided in the present embodiment, a central area of the slit electrode structure is set to be a multi-axial symmetric structure, such as a square structure, a regular polygon structure, or a circular structure, and compared with a conventional 4-domain design, the central penetration rate is improved, so that the overall penetration rate is improved, and the final display effect is optimized.
The first lower substrate and the first upper substrate may be made of a semiconductor material such as glass or quartz, or an organic polymer.
Referring to fig. 6 again, in one embodiment, the color display panel 30 may include a second lower polarizer 301, a second lower substrate 302, a second liquid crystal layer 303, a second upper substrate 304, and a second upper polarizer 305; the color display panel 30 may have any one of four or more domains of MVA, IPS, and FFS; the second lower polarizer 301 is located on the diffuser 20, the second lower substrate 302 is located on the second lower polarizer 301, the second liquid crystal layer 303 is located on the second lower substrate 302, the second upper substrate 304 is located on the second liquid crystal layer 303, and the second upper polarizer 305 is located on the second upper substrate 304. The second lower polarizer 301 and the second upper polarizer 305 are used to transmit a desired light source.
Further, the material of the second lower substrate 302 and the second upper substrate 304 may be a semiconductor material such as glass or quartz, or an organic polymer.
Referring to fig. 6 again, in addition, the dual-layer lcd substrate of the present embodiment further includes a first adhesive layer 40 and a second adhesive layer 50, wherein the first adhesive layer 40 is disposed between the black-and-white display panel 10 and the diffuser 20, specifically between the first upper polarizer 103 of the black-and-white display panel 10 and the diffuser 20, the first adhesive layer 40 is used for bonding the first upper polarizer 103 and the diffuser 20, the second adhesive layer 50 is disposed between the diffuser 20 and the color display panel 30, specifically between the second lower polarizer 301 of the color display panel 30 and the diffuser 20, and the second adhesive layer 50 is used for bonding the second lower polarizer 301 and the diffuser 20.
Further, the first Adhesive layer 40 and the second Adhesive layer 50 each include OCA (optical Clear Adhesive). The OCA has the advantages of high cleanliness, high light transmittance, low haze, high adhesion, no crystal point, no bubbles, water resistance, high temperature resistance, ultraviolet resistance and the like, has uniform thickness and high flatness, has a refractive index close to that of glass, PC and PMMA, and does not generate the problems of yellowing, aging, fogging, separation from a bonded surface, bubbles and the like after long-time use.
The double-layer liquid crystal display panel of the embodiment uses a circular polarizing plate instead of a linear polarizing plate in a polarizing plate system of a black-and-white display panel serving as an auxiliary display screen to improve the transmittance of the first display panel, particularly by a two-polarizing-plate combination mode of a four-polarizing-plate system and a three-polarizing-plate system; on the basis of using the circular polarizing plate, the design of the pixel electrode structure also uses a square electrode structure besides a common Slit electrode (Slit) structure, and particularly arranges a square electrode in a 4-Domain (Domain) central area to further improve the penetration rate of the central area, thereby improving the integral penetration rate of the display.
It should be noted that other structures of the dual-layer liquid crystal display panel provided in this embodiment belong to the common general knowledge in the art, and the preparation and the position thereof are the same as those in the conventional manner in the art, and therefore, the description of this embodiment is omitted for other structures.
Example four
The present invention also provides, in addition to the above-described embodiments, a dual-layer liquid crystal display device, for example, a VA (Vertical Alignment) or MVA mode dual-layer liquid crystal display device, in which a VA mode dual-layer liquid crystal display panel can be applied to: any product or component with a display function, such as an LTPO display device, a Micro LED display device, a liquid crystal panel, electronic paper, an OLED panel, an AMOLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and the like.
Referring to fig. 6, the dual-layer liquid crystal display device may include the dual-layer liquid crystal display panel described in the third embodiment, and the implementation principle and technical effects of the dual-layer liquid crystal display panel described in the third embodiment are similar to those of the dual-layer liquid crystal display panel provided in the foregoing embodiment, and the achieved technical effects are also similar to those of the dual-layer liquid crystal display panel provided in the foregoing embodiment; the display panel can be any one of a VA mode, an IPS mode and a TN mode; are not repeated herein in any detail in relation to the common general knowledge in the art.
It should be noted that other structures of the dual-layer liquid crystal display device of this embodiment belong to the common general knowledge in the art, and the preparation and the location thereof are the same as the conventional manner in the art, so the description of this embodiment is omitted for other structures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. A black-and-white display panel, comprising:
a polarizing plate system including a first lower polarizing plate and a first upper polarizing plate;
a first liquid crystal cell located between the first lower polarizing plate and the first upper polarizing plate, and including a first lower substrate, a first liquid crystal layer, and a first upper substrate;
wherein the content of the first and second substances,
the polarizing plate system is provided with a circular polarizing plate;
the first upper polarizing plate is positioned on the first upper substrate;
the first upper substrate is positioned on the first liquid crystal layer;
the first liquid crystal layer is positioned on the first lower substrate;
and a pixel electrode structure is arranged on the first lower substrate.
2. The black-and-white display panel according to claim 1,
the polarizer system has three polarizers;
wherein the content of the first and second substances,
the first lower polarizing plate is a first lower circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the first upper polarizing plate includes a lambda/4 wave plate;
the lambda/4 wave plate is perpendicular to the lambda/4 wave plate of the first lower circular polarizing plate.
3. The black-and-white display panel according to claim 1,
the polarizing plate system has four polarizing plates;
wherein the content of the first and second substances,
the first lower polarizing plate is a first lower circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the first upper polarizing plate is a first upper circular polarizing plate and comprises a lambda/4 wave plate and a linear polarizing plate;
the optical axis direction of the lambda/4 wave plate and the linear polarization plate forms an included angle of 45 degrees.
4. The black-and-white display panel according to claim 2 or 3,
the panel is in an MVA display mode;
the pixel electrode structure is a slit electrode structure;
the slit electrode structure includes: a four-domain zigzag structure and a two-domain zigzag structure.
5. The black-and-white display panel according to claim 2 or 3,
the pixel electrode structure is a rectangular electrode structure;
the rectangular structure is used for the liquid crystal molecules to be autonomously arranged in a smaller range to form a multi-domain;
the rectangle is of a square structure;
the square structure has a chamfer.
6. The black-and-white display panel according to claim 4,
the central area of the slit electrode structure is arranged to be a multi-axial symmetrical structure;
the multi-axial symmetric structure includes: square structures, regular polygon structures and circular structures.
7. A dual-layer liquid crystal display panel, comprising:
the black-and-white display panel of any one of claims 1 to 6;
the diffusion plate is arranged on the black-and-white display panel;
and the color display panel is arranged on the diffusion plate.
8. The dual-layer liquid crystal display panel according to claim 7, wherein the color display panel is in a four-domain or higher MVA, IPS or FFS display mode; the method comprises the following steps:
a second lower polarizing plate on the diffusion plate;
the second lower substrate is positioned on the second lower polarizing plate;
a second liquid crystal layer on the second lower substrate;
a second upper substrate on the second liquid crystal layer;
and the second upper polarizing plate is positioned on the second upper substrate.
9. The dual-layer liquid crystal display panel of claim 4, further comprising a first glue layer disposed between the black-and-white display panel and the diffuser plate and a second glue layer disposed between the diffuser plate and the color display panel.
10. A two-layer liquid crystal display device comprising the two-layer liquid crystal display panel according to any one of claims 7 to 9.
CN202010194158.2A 2020-03-19 2020-03-19 Black-white display panel, double-layer liquid crystal display panel and double-layer liquid crystal display device Pending CN113495381A (en)

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WO2008129890A1 (en) * 2007-04-17 2008-10-30 Sharp Kabushiki Kaisha Display device, and electronic apparatus having the same
US20120033160A1 (en) * 2009-03-31 2012-02-09 Kunihiro Tashiro Liquid crystal display device
CN110297367A (en) * 2019-06-27 2019-10-01 厦门天马微电子有限公司 A kind of display device
CN110673412A (en) * 2019-10-17 2020-01-10 京东方科技集团股份有限公司 Display panel and display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020036740A1 (en) * 2000-08-11 2002-03-28 Masumi Kubo Liquid crystal display device
WO2008105125A1 (en) * 2007-02-28 2008-09-04 Sharp Kabushiki Kaisha Liquid crystal display device, television receiver, liquid crystal display panel, and liquid crystal display panel manufacturing method
WO2008129890A1 (en) * 2007-04-17 2008-10-30 Sharp Kabushiki Kaisha Display device, and electronic apparatus having the same
US20120033160A1 (en) * 2009-03-31 2012-02-09 Kunihiro Tashiro Liquid crystal display device
CN110297367A (en) * 2019-06-27 2019-10-01 厦门天马微电子有限公司 A kind of display device
CN110673412A (en) * 2019-10-17 2020-01-10 京东方科技集团股份有限公司 Display panel and display device

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Application publication date: 20211012