CN111722438A - LCD display device for double-sided display - Google Patents
LCD display device for double-sided display Download PDFInfo
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- CN111722438A CN111722438A CN202010511614.1A CN202010511614A CN111722438A CN 111722438 A CN111722438 A CN 111722438A CN 202010511614 A CN202010511614 A CN 202010511614A CN 111722438 A CN111722438 A CN 111722438A
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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
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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)
Abstract
The invention discloses an LCD display device for double-sided display. The device comprises a first quantum dot light filter film, a first LCD (liquid crystal display) panel, an LED (light emitting diode) area light source, a second LCD panel and a second quantum dot light filter film which are sequentially stacked from top to bottom. The upper surface and the lower surface of the LED area light source emit light. The first quantum dot filter film and the second quantum dot filter film comprise filter layers and quantum dot layers located on the filter layers. The quantum dot layer is close to the light emitting surface of the LED surface light source. The double-sided display electronic equipment eliminates curtain phenomenon, reduces cost, improves quality, and simultaneously realizes high dynamic contrast HDR and high color gamut.
Description
Technical Field
The invention relates to the technical field of display, in particular to an LCD display device for double-sided display.
Background
The existing method for mounting the double-sided display on various products is to directly attach two sets of liquid crystal display modules back to back together. This mounting will result in an increase in weight and thickness of the product, which is not entirely in line with the trend of being light, thin, short and small. In addition, with the development of the technology, another prior art is that a dual-sided lcd can share part of optical elements, but when assembling a main panel and an auxiliary panel, the main panel and the auxiliary panel are fixed at two sides of a main frame for accommodating the panels, and a backlight module is disposed between the main frame and the main panel and provides light to the auxiliary panel through a light outlet on the main frame. Another problem that arises from the fact that the main panel and the sub-panel share a light guide plate is that, because the size of the sub-panel is usually smaller than that of the main panel and the size of the light outlet on the main frame is smaller than that of the sub-panel in cooperation with that of the main panel, part of the light of the backlight module enters the sub-panel through the light outlet, and the part without the light outlet is completely reflected back to the main panel by the white main frame, so that the main panel often has a phenomenon of uneven light distribution, that is, the light of the part with the light outlet relative to the main frame is darker, forming a shadow in the shape of the light outlet, and thus causing visual differences in the light, color, and the like of the main panel.
Many methods for improving the above problems have been developed, for example, modifying the pattern of the light guide plate of the backlight module to make the light distribution uniform, but the design of the pattern at the critical position is very difficult due to the consumption of part of the light source at the back light-emitting position, and even the light distribution of the product produced by many manufacturers is not uniform after fine tuning (fine tuning), the window curtain phenomenon is still clearly visible on the main panel. Chinese patent CN1924646A realizes the homogenization of double-sided display by designing a fixed surface with a gray-scale surface, and the non-uniformity of light can be reduced by selecting a diffusion plate, but its effect is very slight, which is not enough to improve the situation; or, multi-layer film sheets such as brightness enhancement films or diffusion films are used to reduce the non-uniformity, but the thickness and cost of the double-sided LCD are greatly increased. Therefore, a display architecture that reduces the shadowing, reduces the cost and improves the quality, in particular achieving both high dynamic contrast HDR and high color gamut requires an overall design improvement of the device.
Disclosure of Invention
The technical problem mainly solved by the invention is to provide an LCD display device for double-sided display, which can eliminate curtain phenomenon, reduce cost and improve quality, and simultaneously realize high dynamic contrast HDR and high color gamut.
In order to solve the technical problem, the LCD display equipment for double-sided display comprises a first quantum dot light filter film, a first LCD liquid crystal panel, an LED surface light source, a second LCD liquid crystal panel and a second quantum dot light filter film which are sequentially stacked from top to bottom;
the upper surface and the lower surface of the LED surface light source emit light;
the first quantum dot filter film and the second quantum dot filter film comprise filter layers and quantum dot layers positioned on the filter layers;
the quantum dot layer is close to the light emitting surface of the LED surface light source.
The invention overcomes the defect that in the prior art, in order to reduce the curtain effect, multilayer films such as brightness enhancement films, diffusion films or gray scale surface plates are often used to increase the light brightness so as to reduce the non-uniformity phenomenon, but the effect is not ideal. The double-sided display structure reduces the number of the LED lamp strips and the traditional optical diaphragms, thereby greatly reducing the cost and the thickness. The quantum dot light filter film can effectively improve the color gamut of the display device and simultaneously realize high dynamic contrast HDR, and the preparation process is simple.
In a preferred embodiment, the filter layer comprises at least a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area;
the plurality of sub-pixel regions correspond to a plurality of sub-pixel positions of the LCD liquid crystal panel one to one.
In a preferred embodiment, the LED surface light source includes at least one LED strip, a light guide plate disposed at one side of the LED strip, a first diffusion film disposed above the light guide plate, a first prism sheet disposed above the first diffusion film, a second diffusion film disposed below the light guide plate, and a second prism sheet disposed below the second diffusion film.
In a preferred embodiment, the LED surface light source includes at least one LED lamp panel, a first diffusion film disposed on the LED lamp panel, a first prism sheet disposed above the first diffusion film, a second diffusion film disposed below the LED lamp panel, and a second prism sheet disposed below the second diffusion film.
In a preferred embodiment, the filter layer includes a red color resistance unit, a green color resistance unit, and an organic transparent light resistance unit respectively located on the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region; the light emitted by the LED surface light source is blue.
In a preferred embodiment, the quantum dots comprise at least one of binary phase quantum dots, ternary phase quantum dots, quaternary phase quantum dots, quinary phase quantum dots, core-shell structure quantum dots, and alloy structure quantum dots, wherein the binary phase quantum dots comprise at least one of CdSe, CdS, PbSe, PbS, ZnS, InP, HgS, AgS quantum dots, the ternary phase quantum dots comprise at least one of ZnXCd1-XS/ZnS, CuInS, PbSe XS1-X/PbS quantum dots, the quaternary phase quantum dots comprise at least one of CuInSeS, ZnXCd 1-xsys 1-Y, ZnXCd1-XSe/ZnS, CdSe/CdS, InP/ZnS, CuInS/ZnS quantum dots, and the quinary phase quantum dots comprise at least one of CuInSeS/esp, ZnSeS/ZnS, CuInS/ZnS quantum dots.
In a preferred embodiment, the green sub-pixel area is replaced with a yellow sub-pixel area.
In a preferred embodiment, at least one polarizer is disposed between the quantum dot filter film and the corresponding LCD liquid crystal panel.
Drawings
The invention and its advantages will be better understood by studying the following detailed description of specific embodiments, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
fig. 1 is an exploded view of a double-sided display electronic apparatus according to embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of a double-sided display electronic apparatus of embodiment 1 of the present invention to show the general optical principle thereof.
Fig. 3 is an exploded view of an LED surface light source of a double-sided display electronic device of embodiment 1 of the present invention.
Fig. 4 is an exploded view of an LED surface light source of a double-sided display electronic apparatus of embodiment 2 of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated in an appropriate environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
The word "embodiment" is used herein to mean serving as an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. 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.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise direct contact of the first and second features through another feature in between. 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 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 meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Example 1
First, an LCD display device for double-sided display of embodiment 1 of the present invention will be explained with reference to fig. 1 to 3. One technical solution adopted in this embodiment is to provide an LCD display device for double-sided display, which includes a first quantum dot filter film 105, a first LCD liquid crystal panel 104, an LED surface light source 103, a second LCD liquid crystal panel 102, and a second quantum dot filter film 101, which are sequentially stacked from top to bottom. Light is emitted from the upper surface and the lower surface of the LED surface light source 103;
as shown in fig. 2, the first quantum dot filter film 105 includes a first filter layer 1053, and a first diffusion layer 1052 and a first quantum dot layer 1051 which are located under the first filter layer 1053. The second quantum dot filter 101 includes a second filter layer 1013 and a second quantum dot layer 1011 located above the second filter layer 1013. First quantum dot layer 1051 and second quantum dot layer 1011 are respectively close to the upper and lower light-emitting surfaces of LED light source array 102.
Light emitted from the upper surface and the lower surface of the LED area light source 103 is firstly transmitted to the quantum dot filter film through the liquid crystal panel, and is firstly irradiated on the quantum dot layer close to the light emitting surface of the LED area light source 103, the quantum dot layer realizes light conversion to convert part of blue light into red light and green light, and meanwhile, the fluorescence emission of quantum has scattering property and has no orientation property, so that the light emitted from the quantum dot area light source is transmitted to the filter layer. The red color resistance unit, the green color resistance unit and the organic transparent light resistance unit of the filter layer are correspondingly arranged to realize the corresponding display of the red sub-pixel unit, the green sub-pixel unit and the blue sub-pixel unit. The embodiment overcomes the defect that in the prior art, in order to reduce the curtain effect, multiple layers of films such as brightness enhancement films, diffusion films or gray scale surface plates are often used to increase the brightness of light so as to reduce the non-uniformity phenomenon, but the effect is not ideal. The double-sided display structure of the embodiment reduces the arrangement of the optical film, thereby greatly reducing the cost and the thickness. The quantum dot light filter film can effectively improve the color gamut of the display device and simultaneously realize high dynamic contrast HDR, and the preparation process is simple.
The filter layer includes a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area. The plurality of sub-pixel regions correspond to a plurality of sub-pixel positions of the LCD liquid crystal panel one to one.
The LED surface light source comprises at least one LED light bar 10, a light guide plate 13 arranged on one side of the LED light bar, a first diffusion film 14 arranged above the light guide plate, a first prism sheet 15 arranged above the first diffusion film, a second diffusion film 12 arranged below the light guide plate, and a second prism sheet 11 arranged below the second diffusion film.
The filter layer comprises a red color resistance unit, a green color resistance unit and an organic transparent light resistance unit which are respectively positioned on the red sub-pixel area, the green sub-pixel area and the blue sub-pixel area; the light emitted by the LED surface light source is blue.
The quantum dots are quinary phase alloy quantum dots InP/ZnSeS, and are environment-friendly, environment-friendly and safe.
Example 2
Fig. 3 is a structural view of the LED surface light source 103 of the double-sided display electronic device according to embodiment 2 of the present invention. Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The LED surface light source 103 comprises an LED lamp panel, a first diffusion film arranged on the LED lamp panel, a first prism sheet arranged above the first diffusion film, a second diffusion film arranged below the LED lamp panel, and a second prism sheet arranged below the second diffusion film.
Example 3
Only the differences between embodiment 3 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The green sub-pixel area is replaced by a yellow sub-pixel area.
Example 4
Only the differences between embodiment 4 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The two polaroids are respectively arranged between the two quantum dot light filtering films and the corresponding LCD liquid crystal panels. The polarizer is used to increase the brightness of the visible region of the dual-sided display electronic device.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the present disclosure may be used in any combination, provided that there is no structural conflict, and the combination is not exhaustively described in this specification for brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. The LCD display equipment for double-sided display is characterized by comprising a first quantum dot light filter film, a first LCD liquid crystal panel, an LED surface light source, a second LCD liquid crystal panel and a second quantum dot light filter film which are sequentially stacked from top to bottom;
the upper surface and the lower surface of the LED surface light source emit light;
the first quantum dot filter film and the second quantum dot filter film comprise filter layers and quantum dot layers positioned on the filter layers;
the quantum dot layer is close to the light emitting surface of the LED surface light source.
2. The LCD display device for two-sided display of claim 1, wherein the filter layer comprises at least a red sub-pixel area, a green sub-pixel area, and a blue sub-pixel area;
the plurality of sub-pixel regions correspond to a plurality of sub-pixel positions of the LCD liquid crystal panel one to one.
3. The LCD display device for dual-sided display of claim 2, wherein the LED surface light source comprises at least one LED light bar, a light guide plate disposed at one side of the LED light bar, a first diffusion film disposed above the light guide plate, a first prism sheet disposed above the first diffusion film, a second diffusion film disposed below the light guide plate, and a second prism sheet disposed below the second diffusion film.
4. The LCD display device for two-sided display of claim 2, wherein the LED area light source comprises at least one LED lamp panel, a first diffusion film disposed on the LED lamp panel, a first prism sheet disposed over the first diffusion film, a second prism sheet disposed on the LED lamp panel, a third diffusion film disposed on the second prism sheet, and a fourth diffusion film disposed on the third diffusion film
The second diffusion barrier of lamp plate below sets up second prism piece below the second diffusion barrier.
5. The LCD display device for double-sided display of any of claims 1 to 4, wherein the filter layer comprises a red color resistance unit, a green color resistance unit, and an organic transparent photoresist unit respectively disposed on the red sub-pixel region, the green sub-pixel region, and the blue sub-pixel region; the light emitted by the LED surface light source is blue.
6. The LCD display device for dual-sided display of claim 1, wherein the quantum dots comprise at least one of binary phase quantum dots, ternary phase quantum dots, quaternary phase quantum dots, quinary phase quantum dots, core-shell structure quantum dots, and alloy structure quantum dots, wherein the binary phase quantum dots comprise at least one of CdSe, CdS, PbSe, PbS, ZnS, InP, HgS, and AgS quantum dots, the ternary phase quantum dots comprise at least one of ZnXCd1-XS/ZnS, CuInS, PbSeXS1-X/PbS quantum dots, the quaternary phase quantum dots comprise at least one of CuInSeS, ZnXCd1-xsey 1-Y, ZnXCd1-XSe/ZnS, CdSe/CdS, InP/ZnS, CuInS/ZnS quantum dots, and the quinary phase quantum dots comprise at least one of CuInSeS, ZnSeS/ZnS, ZnS/ZnS quantum dots, At least one quantum dot of CuInS/ZnSeS quantum dots.
7. The LCD display device for two-sided display according to claim 2, wherein the green sub-pixel region is replaced with a yellow sub-pixel region.
8. The LCD display device for double-sided display of claim 1, wherein at least one polarizer is disposed between the quantum dot filter film and the corresponding LCD liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511614.1A CN111722438A (en) | 2020-06-08 | 2020-06-08 | LCD display device for double-sided display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010511614.1A CN111722438A (en) | 2020-06-08 | 2020-06-08 | LCD display device for double-sided display |
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| CN111722438A true CN111722438A (en) | 2020-09-29 |
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| CN202010511614.1A Pending CN111722438A (en) | 2020-06-08 | 2020-06-08 | LCD display device for double-sided display |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924646A (en) * | 2005-09-01 | 2007-03-07 | 建美电子股份有限公司 | Two-side display structure and method for light distribution for uniform two-side display structure |
| US20140132890A1 (en) * | 2012-11-09 | 2014-05-15 | Boe Technology Group Co., Ltd. | Quantum dot color filter, liquid crystal panel and display device |
| CN105044975A (en) * | 2015-08-31 | 2015-11-11 | 京东方科技集团股份有限公司 | Liquid crystal display device |
| CN105280685A (en) * | 2015-09-15 | 2016-01-27 | 京东方科技集团股份有限公司 | Display panel, manufacturing method of display panel, and display device |
| US20180182314A1 (en) * | 2016-12-23 | 2018-06-28 | Newtonoid Technologies, L.L.C. | Intelligent glass displays and methods of making and using same |
-
2020
- 2020-06-08 CN CN202010511614.1A patent/CN111722438A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1924646A (en) * | 2005-09-01 | 2007-03-07 | 建美电子股份有限公司 | Two-side display structure and method for light distribution for uniform two-side display structure |
| US20140132890A1 (en) * | 2012-11-09 | 2014-05-15 | Boe Technology Group Co., Ltd. | Quantum dot color filter, liquid crystal panel and display device |
| CN105044975A (en) * | 2015-08-31 | 2015-11-11 | 京东方科技集团股份有限公司 | Liquid crystal display device |
| CN105280685A (en) * | 2015-09-15 | 2016-01-27 | 京东方科技集团股份有限公司 | Display panel, manufacturing method of display panel, and display device |
| US20180182314A1 (en) * | 2016-12-23 | 2018-06-28 | Newtonoid Technologies, L.L.C. | Intelligent glass displays and methods of making and using same |
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Application publication date: 20200929 |
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