CN109407391B - Transparent liquid crystal display device - Google Patents

Transparent liquid crystal display device Download PDF

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Publication number
CN109407391B
CN109407391B CN201811588813.1A CN201811588813A CN109407391B CN 109407391 B CN109407391 B CN 109407391B CN 201811588813 A CN201811588813 A CN 201811588813A CN 109407391 B CN109407391 B CN 109407391B
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China
Prior art keywords
liquid crystal
crystal display
transparent
region
display device
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CN201811588813.1A
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Chinese (zh)
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CN109407391A (en
Inventor
陈书志
陈俊吉
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN201811588813.1A priority Critical patent/CN109407391B/en
Publication of CN109407391A publication Critical patent/CN109407391A/en
Priority to PCT/CN2019/082066 priority patent/WO2020133798A1/en
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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528Polarisers
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509Filters, e.g. light shielding masks
    • G02F1/133514Colour filters
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133615Edge-illuminating devices, i.e. illuminating from the side
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133606Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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

Abstract

The invention discloses a transparent liquid crystal display device, which comprises a liquid crystal display panel, an upper polaroid and a lower polaroid, wherein the upper polaroid is arranged on the liquid crystal display panel; the upper polarizer comprises at least one first polarizing region and at least one second polarizing region, the first polarizing region corresponds to the transparent region, and the second polarizing region corresponds to the filter region; the lower polarizer comprises a third light deflection area, an absorption axis of the first light deflection area is parallel to an absorption axis of the third light deflection area, and an absorption axis of the second light deflection area is perpendicular to the absorption axis of the third light deflection area.

Description

Transparent liquid crystal display device
Technical Field
The invention relates to the technical field of display, in particular to a transparent liquid crystal display device.
Background
With the development of display technology, various new technologies are emerging, and the transparent display technology is receiving more and more attention due to the characteristic of the transparent display panel and its unique application.
A transparent display generally refers to a display that can be brought into a transparent display state so that a viewer can see an image displayed in the display and a scene behind the display. Transparent displays have many possible applications, such as windows in buildings or automobiles and displays in malls. In addition to the applications of these large devices, small devices such as handheld tablet computers may also benefit from a transparent display, for example, enabling a user to view a map and to view a scene in front through the screen.
It is expected that most of the existing display market will be gradually replaced by transparent displays, for example in the building, advertising and public information fields.
The transparent display is classified into a head-up display, a transparent liquid crystal display and a transparent organic electroluminescent display, among which the head-up display is implemented by an image projection method, and the transparent liquid crystal display and the transparent organic electroluminescent display are transparent displays in a real sense, but the transparent display has a disadvantage of low contrast, which is much lower than that of a general display. The reason is that the background on the back side of the transparent display interferes with the image displayed by the transparent display due to a certain degree of light permeability of the transparent display, and for example, when the background on the back side has a pattern overlapping with or presenting a similar color to the image displayed by the transparent display, the image displayed by the transparent display is susceptible to poor definition and eye fatigue.
Therefore, how to improve the display effect of the transparent display is one of the problems that the present researchers are demanding to solve.
Disclosure of Invention
The invention aims to provide a transparent display, which can display or show a transparent picture in a transparent area by utilizing the fact that an absorption axis of a first polarized area corresponding to the transparent area of a color filter is perpendicular to an absorption axis of a second polarized area corresponding to the filter area of the color filter, and does not need to be additionally provided with a thin film transistor.
In order to achieve the foregoing objective of the present invention, an embodiment of the present invention provides a transparent liquid crystal display device, which includes a liquid crystal display panel, an upper polarizer and a lower polarizer, wherein the upper polarizer is disposed on an upper surface of the liquid crystal display panel, the lower polarizer is disposed on a lower surface of the liquid crystal display panel, and the liquid crystal display panel includes a color filter having at least one transparent area and at least one filter area; the upper polarizer comprises at least one first polarizing region and at least one second polarizing region, the first polarizing region corresponds to the transparent region, and the second polarizing region corresponds to the filter region; the lower polarizer comprises a third light deflection area, wherein an absorption axis of the first light deflection area is parallel to an absorption axis of the third light deflection area, and an absorption axis of the second light deflection area is perpendicular to the absorption axis of the third light deflection area.
In an embodiment of the invention, the transparent region and the filter region are horizontally arranged.
In an embodiment of the invention, the lcd panel further includes a substrate and a liquid crystal layer, the color filter is disposed opposite to the substrate, and the liquid crystal layer is disposed between the color filter and the substrate.
In an embodiment of the present invention, the first light polarizing region is formed by patterning, and the first light polarizing region is attached to the transparent region.
In an embodiment of the invention, the second light-polarizing region is formed by patterning, and the second light-polarizing region is attached to the filter region.
In an embodiment of the invention, the transparent lcd device further includes a backlight module disposed below the lcd panel.
In order to achieve the above object, the backlight module is a side-in type backlight module, and the side-in type backlight module includes a backlight source and a light guide plate disposed at a side of the backlight source.
In an embodiment of the invention, the backlight module is a direct-type backlight module, and the direct-type backlight module includes a backlight source and a diffusion plate disposed above the backlight source.
In an embodiment of the invention, the filter region is composed of a plurality of pixels, and each pixel has a red sub-pixel, a green sub-pixel and a blue sub-pixel.
In an embodiment of the invention, the upper polarizer and the lower polarizer are elliptical polarizing plates.
As described above, the absorption axis of the first polarized light region corresponding to the transparent region is perpendicular to the absorption axis of the second polarized light region corresponding to the filter region, so that the transparent region can be displayed or rendered transparent without additionally disposing a tft, and the display effect of the transparent display is improved.
Drawings
FIG. 1 is a schematic view of a preferred embodiment of a transparent liquid crystal display device according to the present invention.
Fig. 2 is a cross-sectional view of a preferred embodiment of a transparent liquid crystal display device according to the present invention.
FIG. 3 is a cross-sectional view of a side-in type backlight module according to a preferred embodiment of the transparent LCD device of the present invention.
FIG. 4 is a cross-sectional view of a direct type backlight module according to a preferred embodiment of the transparent LCD device of the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. Furthermore, directional phrases used herein, such as, for example, upper, lower, top, bottom, front, rear, left, right, inner, outer, lateral, peripheral, central, horizontal, lateral, vertical, longitudinal, axial, radial, uppermost or lowermost, etc., refer only to the orientation of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Fig. 1 and 2 are schematic views illustrating a transparent liquid crystal display device according to a preferred embodiment of the invention. The transparent liquid crystal display device 100 includes a liquid crystal display panel 2, an upper polarizer 3 and a lower polarizer 4, wherein a user's eye 101 can see an object 102 through the transparent liquid crystal display device 100. The detailed construction, assembly relationship and operation principle of the above components of the embodiments of the present invention will be described in detail below.
Referring to fig. 1 and 2, the upper polarizer 3 is disposed on an upper surface of the liquid crystal display panel 2, and the upper polarizer 3 includes at least one first polarizing region 31 and at least one second polarizing region 32, in this embodiment, the upper polarizer 3 and the lower polarizer 4 are both elliptical polarizing plates.
Referring to fig. 1 and 2, the lower polarizer 4 is disposed on a lower surface of the liquid crystal display panel 2, and the lower polarizer 4 includes a third polarizing region 41, in this embodiment, an absorption axis of the first polarizing region 31 of the upper polarizer 3 is parallel to an absorption axis of the third polarizing region 41 of the lower polarizer 4, and an absorption axis of the second polarizing region 32 of the upper polarizer 3 is perpendicular to an absorption axis of the third polarizing region 41 of the upper polarizer 3.
Referring to fig. 1 and 2, the lcd panel 2 includes a color filter 21, a substrate 22 and a liquid crystal layer 23, wherein the color filter 21 has at least one transparent region 211 and at least one filter region 212. In the present embodiment, the filter region 212 is composed of a plurality of pixels, wherein each pixel has a red sub-pixel, a green sub-pixel and a blue sub-pixel (not shown), and the substrate 22 is a Thin Film Transistor (TFT) array substrate on which TFT devices are disposed.
Referring to fig. 1 and 2, in particular, the first polarization region 31 of the upper polarizer 3 corresponds to the transparent region 211, such that the first polarization region 31 contacts the transparent region 211, and the second polarization region 32 of the upper polarizer 3 corresponds to the filter region 212, such that the second polarization region 32 contacts the filter region 212. In the present embodiment, the transparent regions 211 and the filter regions 212 of the color filter 21 are arranged horizontally.
Referring to fig. 1 and 2, the color filter 21 is disposed opposite to the substrate 22, and the liquid crystal layer 23 is disposed between the color filter 21 and the substrate 22. In the present embodiment, the first light polarizing region 31 is formed by patterning, and the first light polarizing region 31 is attached to the transparent region 211. The second light polarizing region 32 is formed by patterning, and the second light polarizing region 32 is attached to the filter region 212.
Referring to fig. 1 and 2, the transparent lcd device 100 further includes a backlight module 5, and the backlight module 5 is disposed below the lcd panel 2. In the present embodiment, the backlight module 5 is a side-in type backlight module, wherein the side-in type backlight module includes a backlight 51 and a light guide plate 52, and the light guide plate 52 is disposed on one side of the backlight 51 (see fig. 3). In other embodiments, the backlight module 5 is a direct-type backlight module, and the direct-type backlight module includes a backlight 51 and a diffuser plate 53, and the diffuser plate 53 is disposed above the backlight 51 (see fig. 4).
According to the above structure, the lower polarizer 4 is used as the third polarized light region 41, the upper polarizer 3 is divided into the first polarized light region 31 and the second polarized light region 32, and the absorption axis of the first polarized light region 31 is parallel to the absorption axis of the third polarized light region 41, and the absorption axis of the second polarized light region 32 is perpendicular to the absorption axis of the third polarized light region 41, so that the absorption axis of the first polarized light region 31 corresponding to the transparent region 211 is perpendicular to the absorption axis of the second polarized light region 32 corresponding to the filter region 212, when the transparent liquid crystal display device generally displays a picture, the transparent region 211 reduces the background influence, and when the display of the transparent liquid crystal display device is turned off, the transparent region 211 appears transparent.
Through the above design, the absorption axis of the first light-polarizing region 31 corresponding to the transparent region 211 is perpendicular to the absorption axis of the second light-polarizing region 32 corresponding to the filter region 212, so that the transparent region 211 can be displayed or rendered transparent without additionally arranging a thin film transistor, and the display effect of the transparent display is improved.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are included within the scope of the invention.

Claims (10)

1. A transparent liquid crystal display device, characterized in that: the transparent liquid crystal display device comprises a liquid crystal display panel, an upper polaroid and a lower polaroid, wherein the upper polaroid is arranged on the upper surface of the liquid crystal display panel, the lower polaroid is arranged on the lower surface of the liquid crystal display panel, the liquid crystal display panel comprises a color filter, and the color filter is provided with at least one transparent area and at least one filter area;
the upper polarizer comprises at least one first polarizing region and at least one second polarizing region, the first polarizing region corresponds to the transparent region, and the second polarizing region corresponds to the filter region; and
the lower polarizer comprises a third light deflection area, wherein an absorption axis of the first light deflection area is parallel to an absorption axis of the third light deflection area, and an absorption axis of the second light deflection area is perpendicular to the absorption axis of the third light deflection area.
2. The transparent liquid crystal display device as claimed in claim 1, wherein: the transparent area and the light filtering area are horizontally arranged.
3. The transparent liquid crystal display device as claimed in claim 1, wherein: the liquid crystal display panel further comprises a substrate and a liquid crystal layer, the color filter is arranged opposite to the substrate, and the liquid crystal layer is arranged between the color filter and the substrate.
4. A transparent liquid crystal display device as claimed in claim 3, characterized in that: the first light polarizing region is formed by patterning, and the first light polarizing region is attached to the transparent region.
5. A transparent liquid crystal display device as claimed in claim 3, characterized in that: the second light polarizing region is formed by patterning, and the second light polarizing region is attached to the filter region.
6. The transparent liquid crystal display device as claimed in claim 1, wherein: the transparent liquid crystal display device also comprises a backlight module, and the backlight module is arranged below the liquid crystal display panel.
7. The transparent liquid crystal display device as claimed in claim 6, wherein: the backlight module is a side-in type backlight module which comprises a backlight source and a light guide plate arranged on the side of the backlight source.
8. The transparent liquid crystal display device as claimed in claim 6, wherein: the backlight module is a direct-type backlight module, and the direct-type backlight module comprises a backlight source and a diffusion plate arranged above the backlight source.
9. The transparent liquid crystal display device as claimed in claim 1, wherein: the filter area is composed of a plurality of pixels, and each pixel is provided with a red sub-pixel, a green sub-pixel and a blue sub-pixel.
10. The transparent liquid crystal display device as claimed in claim 1, wherein: the upper polarizer and the lower polarizer are elliptical polarizing plates.
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PCT/CN2019/082066 WO2020133798A1 (en) 2018-12-25 2019-04-10 Transparent liquid crystal display device

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