CN111025794A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
CN111025794A
CN111025794A CN201911238537.0A CN201911238537A CN111025794A CN 111025794 A CN111025794 A CN 111025794A CN 201911238537 A CN201911238537 A CN 201911238537A CN 111025794 A CN111025794 A CN 111025794A
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CN
China
Prior art keywords
liquid crystal
substrate
display device
crystal panel
crystal display
Prior art date
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Pending
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CN201911238537.0A
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Chinese (zh)
Inventor
陈江川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN201911238537.0A priority Critical patent/CN111025794A/en
Publication of CN111025794A publication Critical patent/CN111025794A/en
Pending legal-status Critical Current

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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
    • G02F1/1347—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
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13793—Blue phases

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

Abstract

The present invention provides a liquid crystal display device, comprising: the liquid crystal display device comprises a backlight module, a first liquid crystal panel and a second liquid crystal panel. The first liquid crystal panel is used for a picture display panel of the liquid crystal display device. The first liquid crystal panel in the liquid crystal display device realizes color display of the liquid crystal display device by utilizing the characteristics of high response speed of blue phase liquid crystal and no need of a color filter for field effect color matching, thereby improving the contrast of the liquid crystal display device. Because the color display of the liquid crystal display device is realized by the first liquid crystal panel, a color filter is not required to be arranged in the second liquid crystal panel, so that the production cost of the liquid crystal display device is saved to a certain extent, the overall thickness of the liquid crystal display device is reduced, and the transmittance of the liquid crystal display device can be improved.

Description

Liquid crystal display device
Technical Field
The invention relates to the technical field of plane display, in particular to a liquid crystal display device.
Background
With the continuous development of display technology, new flat panel displays are beginning to replace CRT displays, and become the mainstream display devices in the market.
The flat panel Display (LCD) has been accepted in the market at first, and its own light and thin properties make it quickly accepted in the market, and further, it has been widely popularized and applied, which also makes its market share very high. However, the conventional liquid crystal display has low contrast and slow response speed, and cannot meet the requirements of users.
Disclosure of Invention
One aspect of the present invention is to provide a liquid crystal display device, which employs a novel display architecture, and applies a blue phase liquid crystal with high response speed and a field effect color matching without a color filter, so as to improve the contrast ratio and response speed of the liquid crystal display device.
The technical scheme adopted by the invention is as follows:
a liquid crystal display device, comprising: a backlight module; the first liquid crystal panel is arranged on the light emergent side of the backlight module; and the second liquid crystal panel is arranged between the first liquid crystal panel and the backlight module and is used for a picture display panel of the liquid crystal display device. Wherein the first liquid crystal panel includes: a first substrate; the second substrate is arranged opposite to the first substrate; the first liquid crystal layer is arranged between the first substrate and the second substrate and is provided with a plurality of blue phase liquid crystal molecules; the first substrate is provided with a first pixel structure layer to drive blue phase liquid crystal molecules of the first liquid crystal layer to deflect, and the first pixel structure layer comprises a first pixel unit; the second substrate is a bare glass substrate.
Further, wherein the second liquid crystal panel includes: a third substrate; a fourth substrate disposed opposite to the third substrate; and a second liquid crystal layer disposed between the third substrate and the fourth substrate; a second pixel structure layer is arranged on the third substrate to drive liquid crystal molecules of the second liquid crystal layer to deflect, and the second pixel structure layer comprises a second pixel unit; the fourth substrate is a bare glass substrate.
Further, the opening area of the second pixel unit of the second liquid crystal panel is correspondingly consistent with the opening area of the first pixel unit of the first liquid crystal panel.
Further, the refresh frequency of the second liquid crystal panel is lower than the refresh frequency of the first liquid crystal panel.
Further, the refresh frequency of the second liquid crystal panel is 1/4-1/2 of the refresh frequency of the first liquid crystal panel.
Further, the first pixel unit sequentially displays a first color, a second color and a third color, and color display is achieved through visual superposition.
Further, the first pixel structure layer drives the blue phase liquid crystal molecules of the first liquid crystal layer to deflect by a first electric field, and the first electric field comprises: a first electrode disposed on the first substrate; and a second electrode disposed on the first substrate or the second substrate corresponding to the first electrode.
Further, the second liquid crystal panel is attached to the first liquid crystal panel through a transparent adhesive.
Further, the transparent adhesive comprises one or more of organic resin and siloxane.
Further wherein the thickness of the transparent adhesive ranges from 4 to 10 μm.
The invention has the technical effects that: the invention relates to a liquid crystal display device, which adopts a novel display framework of double-cell superposition of a first liquid crystal panel and a second liquid crystal panel, wherein the first liquid crystal panel is used for a picture display panel of the liquid crystal display device. The first liquid crystal panel realizes color display of the liquid crystal display device by utilizing the characteristics of high response speed of blue phase liquid crystal and no need of a color filter for field effect color matching, thereby improving the contrast of the liquid crystal display device. Because the color display of the liquid crystal display device is realized by the first liquid crystal panel, a color filter is not required to be arranged in the second liquid crystal panel, so that the production cost of the liquid crystal display device is saved to a certain extent, the overall thickness of the liquid crystal display device is reduced, and the transmittance of the liquid crystal display device can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a liquid crystal display device according to the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to make and use the present invention in a complete manner, and is provided for illustration of the technical disclosure of the present invention so that the technical disclosure of the present invention will be more clearly understood and appreciated by those skilled in the art how to implement the present invention. The present invention may, however, be embodied in many different forms of embodiment, and the scope of the present invention should not be construed as limited to the embodiment set forth herein, but rather construed as being limited only by the following description of the embodiment. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are used for explaining and explaining the present invention, but not for limiting the scope of the present invention.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. In addition, the size and thickness of each component shown in the drawings are arbitrarily illustrated for convenience of understanding and description, and the present invention is not limited to the size and thickness of each component.
When certain components are described as being "on" another component, the component can be directly on the other component; there may also be an intermediate component disposed on the intermediate component and the intermediate component disposed on another component. When an element is referred to as being "mounted to" or "connected to" another element, they are directly "mounted to" or "connected to" the other element or "mounted to" or "connected to" the other element through an intermediate element.
Examples
As shown in fig. 1, the present embodiment provides a liquid crystal display device including: a first liquid crystal panel 10, a second liquid crystal panel 20 and a backlight module 30.
As shown in fig. 1, the first liquid crystal panel 10 is disposed on the light-emitting side of the backlight module 30. The second liquid crystal panel 20 is disposed between the first liquid crystal panel 10 and the backlight module 30, and the second liquid crystal panel 20 is used for a picture display panel of the liquid crystal display device.
The first liquid crystal panel 10 and the second liquid crystal panel 20 are bonded together by a transparent adhesive 40. The specific material used for the transparent adhesive 40 is preferably a transparent adhesive material such as organic resin or silicone, but may be other transparent adhesive materials known in the art, and is not limited as required.
The specific thickness of the transparent adhesive 40 may be in the range of 4 to 10 μm, preferably 6 μm. The liquid crystal cell thickness of the first liquid crystal panel 10 may be in the range of 2-5um, and the liquid crystal cell thickness of the second liquid crystal panel 20 is also in the range of 2-5 um. When the thickness of the transparent adhesive 40 is less than 4 μm, the bonding effect between the first liquid crystal panel 10 and the second liquid crystal panel 20 is affected, and the risk of falling off exists; when the thickness of the transparent adhesive 40 is more than 10 μm, the material is wasted and the cost is increased.
The first liquid crystal panel 10 includes: a first substrate 101, a second substrate 102, and a first liquid crystal layer 103.
The first substrate 101 is provided with a first pixel structure layer for driving the blue phase liquid crystal molecules of the first liquid crystal layer 103 to deflect; the first pixel structure layer comprises a first pixel unit. The first pixel structure layer drives the blue phase liquid crystal molecules of the first liquid crystal layer to deflect through a first electric field, and the first electric field comprises: a first electrode disposed on the first substrate; and a second electrode disposed on the first substrate or the second substrate corresponding to the first electrode. Specifically, when the second electrode is disposed on the first substrate 101, that is, the first liquid crystal panel 10 adopts a TN/VA display mode; when the second electrode is disposed on the second substrate 102, the first liquid crystal panel 10 adopts the IPS/FFS display mode.
The second substrate 102 is disposed opposite to the first substrate 101. The second substrate 102 is a bare glass substrate, that is, the second substrate 102 is not provided with any structure including a color filter layer, so that the production cost of the liquid crystal display device on which the second substrate is located is saved to a certain extent, and the overall thickness of the liquid crystal display device on which the second substrate is located is reduced.
The first liquid crystal layer 103 is disposed between the first substrate 101 and the second substrate 102, and the first liquid crystal layer 103 has a plurality of blue phase liquid crystal molecules therein. The blue phase liquid crystal molecules have the characteristics of high response speed and no need of a color filter for field effect color matching.
The first pixel unit sequentially displays a first color, a second color and a third color, and color display is achieved through field effect visual superposition.
Specifically, blue phase liquid crystal molecules stacked together may cause crystal defects at the intersections due to imperfect arrangement of atoms or molecules, thereby making the blue phase liquid crystal molecules distinctive. The spacing between the crystal defects is only hundreds of nanometers, and according to the Bragg reflection principle, light rays encounter the defects and then interfere with each other, so that colored reflected light can be generated, and an external voltage is applied on the basis, so that the reflected light can show different colors along with the change of the lattice refractive index due to the Kerr effect.
The first pixel unit sequentially displays the first color, the second color and the third color in a short time by utilizing the characteristic of high response speed of blue phase liquid crystal molecules, and the colors displayed in the several periods of time are overlapped due to the fact that the colors cannot be rapidly switched because of the vision residue of human eyes, so that the colors after being mixed can be seen. Therefore, color display can be realized without additionally arranging a color filter.
Wherein the second liquid crystal panel 20 includes: a third substrate 201; a fourth substrate 202 disposed opposite to the third substrate 201; and a second liquid crystal layer 203 provided between the third substrate 201 and the fourth substrate 202; the third substrate 201 is provided with a second pixel structure layer for driving the liquid crystal molecules of the second liquid crystal layer 203 to deflect; the second pixel structure layer comprises a second pixel unit. Since the second liquid crystal panel 20 is used as a screen display panel of a liquid crystal display device, the fourth substrate 102 is a bare glass substrate, that is, the fourth substrate 202 is not provided with any structure including a color filter layer, so that the production cost of the liquid crystal display device in which the liquid crystal display device is located is saved to a certain extent, and the overall thickness of the liquid crystal display device in which the liquid crystal display device is located is reduced.
Further, the opening area of the second pixel unit of the second liquid crystal panel 20 corresponds to and coincides with the opening area of the first pixel unit of the first liquid crystal panel 10. Therefore, the light emitted from the second liquid crystal panel 20 can be accurately incident to the opening region of the first liquid crystal panel 10, and the problems of light leakage and the like of the first liquid crystal display panel 10 are avoided.
Wherein the refresh frequency of the second liquid crystal panel 20 is lower than the refresh frequency of the first liquid crystal panel 10. Wherein the refresh frequency of the second liquid crystal panel 20 is 1/4-1/2 of the refresh frequency of the first liquid crystal panel 10. Preferably, the refresh frequency of the second liquid crystal panel 20 is 1/3 of the refresh frequency of the first liquid crystal panel 10.
Specifically, the conventional liquid crystal display device emits light with different brightness through RGB three-color sub-pixels, and mixes various colors; according to the scheme, the first pixel unit sequentially displays the first color, the second color and the third color in a short time, and due to the fact that human eyes can not distinguish the rapid color switching, the colors displayed in the several periods of time are overlapped, so that the colors after being mixed can be seen. Since the first pixel unit respectively realizes three colors of RGB, and then mixes the colors through the visual residual effect, compared with the conventional liquid crystal display device RGB three-color sub-pixels, the color mixing can be realized only by 1/3 space, and the PPI is higher.
For example, the conventional liquid crystal display device emits light with different brightness through RGB three-color sub-pixels, and the refresh frequency of mixing various colors is 60 hz. The same effect needs to be achieved, and the first color, the second color and the third color need to be displayed in sequence within the same time, so that a higher frequency (180hz) is needed. Since the second liquid crystal panel 20 of the present embodiment only controls the light intensity incident on the first liquid crystal panel 10, the refresh frequency of the second liquid crystal panel 20 is 1/3 of the refresh frequency of the first liquid crystal panel 10, which only needs to be maintained at 60 hz.
Specifically, for example, assuming that the white transmittance of the first liquid crystal panel 10 is 10%, the second liquid crystal panel 20 is 15%, and the black luminance of both the first liquid crystal panel 10 and the second liquid crystal panel 20 is 0.01%, the pixel contrast ratio should be CR (10% × 15%)/(0.01% × 0.01%) 1,500,000 at this time, which indicates that the novel liquid crystal display device provided by the present application can realize high-contrast display.
The technical scope of the present invention is not limited to the contents described in the above description, and those skilled in the art can make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should fall within the scope of the present invention.

Claims (10)

1. A liquid crystal display device, comprising:
a backlight module;
the first liquid crystal panel is arranged on the light emergent side of the backlight module; and
the second liquid crystal panel is arranged between the first liquid crystal panel and the backlight module and is used for a picture display panel of the liquid crystal display device;
wherein the first liquid crystal panel includes:
a first substrate;
the second substrate is arranged opposite to the first substrate; and
a first liquid crystal layer disposed between the first substrate and the second substrate and having a plurality of blue phase liquid crystal molecules;
the first substrate is provided with a first pixel structure layer to drive blue phase liquid crystal molecules of the first liquid crystal layer to deflect, and the first pixel structure layer comprises a first pixel unit;
the second substrate is a bare glass substrate.
2. The liquid crystal display device according to claim 1, wherein the second liquid crystal panel comprises:
a third substrate;
a fourth substrate disposed opposite to the third substrate; and
a second liquid crystal layer disposed between the third substrate and the fourth substrate;
a second pixel structure layer is arranged on the third substrate to drive liquid crystal molecules of the second liquid crystal layer to deflect, and the second pixel structure layer comprises a second pixel unit;
the fourth substrate is a bare glass substrate.
3. The liquid crystal display device according to claim 2, wherein the opening area of the second pixel unit of the second liquid crystal panel is correspondingly aligned with the opening area of the first pixel unit of the first liquid crystal panel.
4. The liquid crystal display device according to claim 1, wherein a refresh frequency of the second liquid crystal panel is lower than a refresh frequency of the first liquid crystal panel.
5. The liquid crystal display device according to claim 4, wherein the refresh frequency of the second liquid crystal panel is 1/4 to 1/2 of the refresh frequency of the first liquid crystal panel.
6. The liquid crystal display device according to claim 1, wherein the first pixel unit sequentially displays a first color, a second color, and a third color, and performs a visual superimposition to realize a color display.
7. The liquid crystal display device of claim 1, wherein the first pixel structure layer drives the blue phase liquid crystal molecules of the first liquid crystal layer to deflect by a first electric field, the first electric field comprising:
a first electrode disposed on the first substrate; and
and the second electrode is arranged on the first substrate or the second substrate corresponding to the first electrode.
8. The liquid crystal display device according to claim 1, wherein the second liquid crystal panel is attached to the first liquid crystal panel by a transparent adhesive.
9. The liquid crystal display device according to claim 8, wherein the transparent adhesive comprises one or more of an organic resin and a siloxane.
10. The liquid crystal display device according to claim 8, wherein the transparent adhesive has a thickness in a range of 4 to 10 μm.
CN201911238537.0A 2019-12-06 2019-12-06 Liquid crystal display device Pending CN111025794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911238537.0A CN111025794A (en) 2019-12-06 2019-12-06 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911238537.0A CN111025794A (en) 2019-12-06 2019-12-06 Liquid crystal display device

Publications (1)

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CN111025794A true CN111025794A (en) 2020-04-17

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104471634A (en) * 2012-07-20 2015-03-25 深圳云英谷科技有限公司 Field sequential color display
CN105116617A (en) * 2015-10-10 2015-12-02 友达光电股份有限公司 Liquid crystal displayer based on prism color sequence method
CN105425496A (en) * 2016-01-06 2016-03-23 上海交通大学 Blue phase liquid crystal phase modulator and polarization non-independent method thereof
CN106908995A (en) * 2017-03-29 2017-06-30 深圳市国显科技有限公司 A kind of field sequence LCD device and projecting apparatus of use quanta point material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104471634A (en) * 2012-07-20 2015-03-25 深圳云英谷科技有限公司 Field sequential color display
CN105116617A (en) * 2015-10-10 2015-12-02 友达光电股份有限公司 Liquid crystal displayer based on prism color sequence method
CN105425496A (en) * 2016-01-06 2016-03-23 上海交通大学 Blue phase liquid crystal phase modulator and polarization non-independent method thereof
CN106908995A (en) * 2017-03-29 2017-06-30 深圳市国显科技有限公司 A kind of field sequence LCD device and projecting apparatus of use quanta point material

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Application publication date: 20200417