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CN109870843A - Reflective LCD device - Google Patents

Reflective LCD device Download PDF

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Publication number
CN109870843A
CN109870843A CN201910198607.8A CN201910198607A CN109870843A CN 109870843 A CN109870843 A CN 109870843A CN 201910198607 A CN201910198607 A CN 201910198607A CN 109870843 A CN109870843 A CN 109870843A
Authority
CN
China
Prior art keywords
polaroid
light
guide plate
liquid crystal
crystal display
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910198607.8A
Other languages
Chinese (zh)
Inventor
占江徽
赵雪梅
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.)
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Hefei BOE Optoelectronics 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.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Hefei BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201910198607.8A priority Critical patent/CN109870843A/en
Publication of CN109870843A publication Critical patent/CN109870843A/en
Priority to PCT/CN2020/078750 priority patent/WO2020187105A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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

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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 present invention provides a kind of reflective LCD device, belongs to field of display technology, can at least partly solve the problems, such as existing reflective LCD device display defect as caused by noise light.A kind of reflective LCD device of the invention, comprising: liquid crystal display panel comprising reflecting layer, liquid crystal display structure, the first polaroid, liquid crystal display structure is between reflecting layer and the first polaroid;Light-source structure positioned at the first polaroid far from reflecting layer side, for shining to liquid crystal display panel;The second polaroid positioned at light-source structure far from liquid crystal display panel side, second polaroid, which is used to filter from light-source structure, is emitted directly toward the light far from liquid crystal display panel side, and the angle between the saturating vibration direction of the first polaroid and the saturating vibration direction of the second polaroid is less than 45 °.

Description

Reflective LCD device
Technical field
The invention belongs to field of display technology, and in particular to a kind of reflective LCD device.
Background technique
As shown in Figure 1, being equipped in a kind of reflective LCD device of the prior art positioned at liquid crystal display structure 12 The light-source structure 20 of light emission side (light-source structure is made of light source led 21 and light guide plate LGP22).The spy that light-source structure 20 issues The light for determining angle successively passes through the first polaroid 13, and liquid crystal display structure 12 is finally located at liquid crystal display structure 12 far from light The reflecting layer 11 of 20 side of source structure is reflected into human eye, to realize display picture.
However, only some (shown in solid arrow as shown in figure 1) enters liquid crystal in the light that the light-source structure 20 issues Show structure 12, another part light (noise light, shown in dotted arrow as shown in figure 1) there is no by liquid crystal display structure 12 and It is to be directly entered human eye.The noise light does not carry the image information of liquid crystal display structure 12, not only to being displayed without meaning, and And will cause and show the low equal display defects of the contrast of image, to make to show that image sharpness reduces.In addition, the noise light Blue light ingredient is relatively more, may damage to human eye.
Summary of the invention
The present invention at least partly solves existing reflective LCD device display defect as caused by noise light Problem provides a kind of reflective LCD device that display effect can be improved.
Solving technical solution used by present invention problem is a kind of reflective LCD device, comprising:
Liquid crystal display panel comprising reflecting layer, liquid crystal display structure, the first polaroid, the liquid crystal display structure position Between the reflecting layer and first polaroid;
Light-source structure positioned at first polaroid far from the reflecting layer side is used for the liquid crystal display panel It shines;
The second polaroid positioned at the light-source structure far from the liquid crystal display panel side, second polaroid are used It is emitted directly toward the light far from the liquid crystal display panel side from the light-source structure in filtering, and first polaroid is saturating The angle to shake between direction and the saturating vibration direction of second polaroid is less than 45 °.
It may further be preferable that the saturating vibration direction phase in the saturating vibration direction of first polaroid and second polaroid Together.
It may further be preferable that the light-source structure includes: light source and light guide plate, the light guide plate is located at the liquid crystal Between display panel and second polaroid, the light source is located at outside the side of the light guide plate, so that the light source issues Light entered in the light guide plate by the side of the light guide plate.
It may further be preferable that the surface of side of the light guide plate far from the liquid crystal display panel has for making light The protrusion being totally reflected in the light guide plate.
It may further be preferable that the protrusion is the triangular prism of array distribution.
It may further be preferable that the reflective LCD device further include: connect the light guide plate and described second partially The connector of mating plate, the connector between the light guide plate and second polaroid and by it is described protrusion between Gap is filled up, and the refractive index of the connector is less than the refractive index of the light guide plate.
It may further be preferable that the height of the connector is more than or equal to 5 times of the height of projection.
It may further be preferable that the reflective LCD device further include: be located at the light guide plate and described second partially The connector of marginal zone between mating plate, the connector are used for the marginal zone of the light guide plate and second polaroid Marginal zone is fixedly connected, and makes have gap between the light guide plate and second polaroid.
It may further be preferable that the connector includes glue material.
It may further be preferable that the reflective LCD device further include: touch-control structure is located at second polaroid Side far from the liquid crystal display panel.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing reflective LCD device;
Fig. 2 a is a kind of structural schematic diagram of reflective LCD device of the embodiment of the present invention;
Fig. 2 b is the structural schematic diagram of the partial enlargement of the reflective LCD device of Fig. 2 a;
Fig. 3 is the structural schematic diagram of another reflective LCD device of the embodiment of the present invention;
Wherein, appended drawing reference are as follows: 10 liquid crystal display panels;11 reflecting layer;12 liquid crystal display structures;13 first polaroids; 20 light-source structures;21 light sources;22 light guide plates;221 protrusions;30 second polaroids;40 connectors.
Specific embodiment
Hereinafter reference will be made to the drawings, and the present invention will be described in more detail.In various figures, identical element is using similar attached Icon is remembered to indicate.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.In addition, may not show in figure Certain well known parts out.
Many specific details of the invention, such as structure, material, size, the processing work of component is described hereinafter Skill and technology, to be more clearly understood that the present invention.But it just as the skilled person will understand, can not press The present invention is realized according to these specific details.
Embodiment 1:
As shown in Figure 2 to Figure 3, wherein Fig. 2 b is the second polaroid 30 in the reflective LCD device of Fig. 2 a, company The structural schematic diagram of the partial enlargement of fitting 40 and light guide plate 22.
The present embodiment provides a kind of reflective LCD devices, comprising:
Liquid crystal display panel 10 comprising reflecting layer 11, liquid crystal display structure 12, the first polaroid 13, liquid crystal display knot Structure 12 is located between reflecting layer 11 and the first polaroid 13;
Light-source structure 20 positioned at the first polaroid 13 far from 11 side of reflecting layer, for being sent out to liquid crystal display panel 10 Light;
The second polaroid 30 positioned at light-source structure 20 far from 10 side of liquid crystal display panel, the second polaroid 30 were used for Optical filtering source structure 20 is emitted directly toward the light far from 10 side of liquid crystal display panel, and the saturating vibration direction and second of the first polaroid 13 Angle between the saturating vibration direction of polaroid 30 is less than 45 °.
Wherein, that is to say, that in the reflective LCD device, light-source structure 20 is located at liquid crystal display panel 10 Light emission side, i.e. front located light source of the light-source structure 20 as liquid crystal display panel 10, and the light that the light-source structure 20 issues is at least A part can enter liquid crystal display panel 10.
Liquid crystal display panel 10 includes reflecting layer 11, liquid crystal display structure 12 and the first polaroid 13, that is to say, that liquid Crystalline substance display structure 12, the first polaroid 13 positioned at reflecting layer 11 and light-source structure 20 between, the sending of such light-source structure 20 into The light for entering liquid crystal display panel 10 can be by the first polaroid 13, liquid crystal display structure 12, and is reflected by reflecting layer 11, reflects Light afterwards is again through liquid crystal display structure 12, the first polaroid 13, finally from the light emission side (liquid crystal of liquid crystal display panel 10 Display structure 12 is provided with the side of the first polaroid 13) it issues, to realize display picture, such as the solid arrow institute in Fig. 2 a Show.Liquid crystal display structure 12 can also include the structures (not shown)s such as liquid crystal layer, color film layer, substrate, in the present invention not It illustrates.
The light (noise light) for being emitted directly toward the second polaroid 30 from light-source structure 20 is non-polarized light, therefore the light passes through second 50% is weakened after polaroid 30.And after liquid crystal display structure 12 and the first polaroid 13 the second polaroid of directive 30 light (display light) is necessarily polarised light, since the first polaroid 13 and the second polaroid 30 are arranged in parallel, and the first polaroid 13 The angle between vibration direction and the saturating vibration direction of the second polaroid 30 is less than 45 ° thoroughly, therefore the second polaroid 30 can be made to from the One polaroid, 13 directive its light weakening degree less than 50% (i.e. smaller than the weakening ratio of noise light).
The second polaroid 30 in the reflective LCD device of the present embodiment can greatly reduce light-source structure 20 Extraneous light (noise light, as shown in the dotted arrow in Fig. 2 a) is emitted directly toward without liquid crystal display panel 10, to reduce It shows that the contrast of image is low and waits display defects, improve the clarity of display picture.Further, since blue light (the blue light of noise light Human eye being damaged larger) comparison of ingredients is more, and the second polaroid 30 can reduce blue light and enter human eye (can reduce 50%), to eyes It plays a protective role.
Preferably, the saturating vibration direction of the first polaroid 13 and the saturating vibration direction of the second polaroid 30 are identical.
Wherein, that is to say, that when the first polaroid 13 is identical with the polarization direction of the light of the second polaroid 30, the second polarisation Piece 30 will not weaken its light from 13 directive of the first polaroid, and the second polaroid 30 is directly penetrated to from light-source structure 20 Weakening degree to its light (noise light) is still 50%.
The saturating vibration direction of the first polaroid 13 and saturating vibration direction of the second polaroid 30 is identical can guarantee from liquid crystal display The light that panel 10 projects will not be weakened, that is to say, that the reflective LCD device is not influencing normally to show (such as not Influence the brightness normally shown) under the premise of, greatly reduce the noise light of light emitting structure sending.
Preferably, light-source structure 20 includes: light source 21 and light guide plate (LGP) 22, and light guide plate 22 is located at LCD display Between plate 10 and the second polaroid 30, light source 21 is located at outside the side of light guide plate 22, so that the light that light source 21 issues passes through leaded light The side of plate 22 enters in light guide plate 22.
Wherein, that is to say, that the light issued from light source 21 is not directed into liquid crystal display panel 10 or is directly entered ring In border, but the light that light source 21 issues is entered in light guide plate 22 by the side of light guide plate 22, into the light hair in light guide plate 22 Raw total reflection eventually enters into liquid crystal display panel 10 or is entered in environment by the second polaroid 30.Specifically, light source 21 can Think LED;Light guide plate (LGP) 22 can be formed by materials such as polymetylmethacrylate or polycarbonates.
The more uniform directive liquid crystal display panel 10 that light guide plate 22 can make light source 21 luminous, the i.e. light-source structure 20 can emit uniform light to liquid crystal display panel 10, so that display effect can be improved.
Preferably, the surface of side of the light guide plate 22 far from liquid crystal display panel 10 has for making light in light guide plate 22 The protrusion 221 (Pattern) being totally reflected.
Wherein, that is to say, that by adjusting protrusion 221 shape can make that light source 21 issues into light guide plate 22 Light is as much as possible on the face with protrusion 221 to be totally reflected, final uniform directive reflecting layer 11, not only can The luminous uniformity for improving light-source structure 20 can also reduce light loss, improve luminous efficiency.
It needs, since light source 21 is set to the side of light guide plate 22, therefore the illumination that light source 21 issues is to light guide plate 22 Protrusion 221 where face when incidence angle it is bigger, and the face at 221 place of protrusion of light guide plate 22 is reflexed to by reflecting layer 11 Most of light incidence angle it is smaller, therefore adjustable raised 221 shape to be incident upon light guide plate 22 from light source 21 Most of light in the face where protrusion 221 is totally reflected, and where so that reflecting layer 11 is reflexed to the protrusion 221 of light guide plate 22 Most of light in face reflects, to will not influence the normal display of reflective LCD device.
Specifically, protrusion 221 is the triangular prism or other suitable shapes of array distribution.
Preferably, as shown in Figure 2 b, the reflective LCD device of the present embodiment further include: connection light guide plate 22 and the The connector 40 of two polaroids 30, connector 40 are located between light guide plate 22 and the second polaroid 30 and will be between protrusions 221 Gap is filled up, the refractive index of connector 40 be less than light guide plate 22 refractive index (n1 < n2, n1 indicate the refractive index of connector 40, The refractive index of n2 expression light guide plate 22).
Wherein, that is to say, that connector 40 fills and leads up the face that light guide plate 22 is equipped with protrusion 221, and connector 40 is far from leading The face of tabula rasa 22 is plane, which connect with the second polaroid 30, to form consolidating for light guide plate 22 and the second polaroid 30 Fixed connection.
The light into light guide plate 22 that the refractive index that the refractive index of connector 40 is less than light guide plate 22 can be such that light source 21 issues It remains to be totally reflected on the face with protrusion 221, thus uniform directive liquid crystal display panel 10.
Preferably, the height of connector 40 is more than or equal to 5 times of (d1 >=5d2, d1 expression connectors 40 of raised 221 height Height, d2 indicate protrusion 221 height).
Wherein, that is to say, that connector 40 all covers protrusion 221.
The height of connector 40 be more than or equal to raised 221 height 5 times can guarantee connector 40 far from light guide plate 22 The flatness in face, so as to improve the degree of stability that connector 40 connects light guide plate 22 and the second polaroid 30.
Specifically, the connector 40 includes glue material (such as sub- quick glue material).
Connector 40 including glue material can make the second polaroid 30 be directly bonded to the face that light guide plate 22 has protrusion 221 On, to guarantee the connection effect of the second polaroid 30 and light guide plate 22.
As shown in figure 3, the connector 40 of the present embodiment can also be another structure:
Connector 40 can also be only positioned at the marginal zone between light guide plate 22 and the second polaroid 30, i.e. connector 40 is used for The marginal zone of light guide plate 22 is fixedly connected with the marginal zone of the second polaroid 30, and make light guide plate 22 and the second polaroid 30 it Between have gap.
Wherein, that is to say, that light guide plate 22 only has edge region to connect (frame patch) with the second polaroid 30, and connector 40 height is more than or equal to the height of protrusion 221.The fringe region specifically refers to the non-display area of reflective LCD device, And there is the gap full of air between viewing area light guide plate 22 and the second polaroid 30, i.e., the light reflected from reflecting layer 11 is not By connector 40, and directly to the second polaroid 30.
Since the refractive index of air is less than the refractive index of light guide plate 22, then the entrance that can further improve the sending of light source 21 is led Total reflectivity of the light of tabula rasa 22 on the face with protrusion 221, more uniform directive liquid crystal display panel 10.
Specifically, the connector 40 includes glue material (such as sub- quick glue material).
Preferably, the reflective LCD device of the present embodiment further include: touch-control structure (Touch glass or Touch film), the side (not shown) positioned at the second polaroid 30 far from liquid crystal display panel 10.
Wherein, that is to say, that the reflective LCD device of the present embodiment can be touch-control display panel.Specifically, touching One face of control structure (such as touch base plate or touch control film) connects completely with the second face of the polaroid 30 far from liquid crystal display panel 10 Connect (face paste).
Reflective LCD device of the invention can reduce light-source structure 20 under the premise of not influencing touch-control performance The noise light of generation, so that the contrast for reducing display image is low to wait display defects, to improve the clarity of display picture.
Specifically, the reflective LCD device can be Electronic Paper, mobile phone, tablet computer, television set, display, pen Remember any products or components having a display function such as this computer, Digital Frame, navigator.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including element.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.The present invention is only by right The limitation of claim and its full scope and equivalent.

Claims (10)

1. a kind of reflective LCD device characterized by comprising
Liquid crystal display panel comprising reflecting layer, liquid crystal display structure, the first polaroid, the liquid crystal display structure are located at institute It states between reflecting layer and first polaroid;
Light-source structure positioned at first polaroid far from the reflecting layer side, for being sent out to the liquid crystal display panel Light;
The second polaroid positioned at the light-source structure far from the liquid crystal display panel side, second polaroid were used for It filters from the light-source structure and is emitted directly toward the light far from the liquid crystal display panel side, and the saturating vibration side of first polaroid To the angle between the saturating vibration direction of second polaroid less than 45 °.
2. reflective LCD device according to claim 1, which is characterized in that
The saturating vibration direction of first polaroid and the saturating vibration direction of second polaroid are identical.
3. reflective LCD device according to claim 1, which is characterized in that the light-source structure includes: light source And light guide plate, for the light guide plate between the liquid crystal display panel and second polaroid, the light source is located at institute It states outside the side of light guide plate, so that the light that the light source issues is entered in the light guide plate by the side of the light guide plate.
4. reflective LCD device according to claim 3, which is characterized in that the light guide plate is far from the liquid crystal The surface of the side of display panel has the protrusion for being totally reflected light in the light guide plate.
5. reflective LCD device according to claim 4, which is characterized in that the protrusion is the three of array distribution Prism.
6. reflective LCD device according to claim 4, which is characterized in that further include: connect the light guide plate With the connector of second polaroid, the connector is between the light guide plate and second polaroid and will be described Gap between protrusion is filled up, and the refractive index of the connector is less than the refractive index of the light guide plate.
7. reflective LCD device according to claim 6, which is characterized in that the height of the connector be greater than etc. In 5 times of the height of projection.
8. reflective LCD device according to claim 4, which is characterized in that further include: it is located at the light guide plate The connector of marginal zone between second polaroid, the connector be used for by the marginal zone of the light guide plate with it is described The marginal zone of second polaroid is fixedly connected, and makes have gap between the light guide plate and second polaroid.
9. according to the reflective LCD device of claim 6 or 8, which is characterized in that the connector includes glue Material.
10. reflective LCD device according to claim 1, which is characterized in that further include:
Touch-control structure, positioned at the side of second polaroid far from the liquid crystal display panel.
CN201910198607.8A 2019-03-15 2019-03-15 Reflective LCD device Pending CN109870843A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201910198607.8A CN109870843A (en) 2019-03-15 2019-03-15 Reflective LCD device
PCT/CN2020/078750 WO2020187105A1 (en) 2019-03-15 2020-03-11 Reflective liquid crystal display apparatus and preparation method therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910198607.8A CN109870843A (en) 2019-03-15 2019-03-15 Reflective LCD device

Publications (1)

Publication Number Publication Date
CN109870843A true CN109870843A (en) 2019-06-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
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CN (1) CN109870843A (en)
WO (1) WO2020187105A1 (en)

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WO2020187105A1 (en) * 2019-03-15 2020-09-24 京东方科技集团股份有限公司 Reflective liquid crystal display apparatus and preparation method therefor
CN113888958A (en) * 2020-07-02 2022-01-04 广州视享科技有限公司 Optical display device, optical display control method and display
CN115097564A (en) * 2022-07-14 2022-09-23 友达光电(昆山)有限公司 Optical component and display device using the same
WO2024260159A1 (en) * 2023-06-21 2024-12-26 京东方科技集团股份有限公司 Display apparatus and manufacturing method therefor

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020187105A1 (en) * 2019-03-15 2020-09-24 京东方科技集团股份有限公司 Reflective liquid crystal display apparatus and preparation method therefor
CN113888958A (en) * 2020-07-02 2022-01-04 广州视享科技有限公司 Optical display device, optical display control method and display
CN115097564A (en) * 2022-07-14 2022-09-23 友达光电(昆山)有限公司 Optical component and display device using the same
CN115097564B (en) * 2022-07-14 2024-03-01 友达光电(昆山)有限公司 Optical assembly and display device using same
WO2024260159A1 (en) * 2023-06-21 2024-12-26 京东方科技集团股份有限公司 Display apparatus and manufacturing method therefor

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Application publication date: 20190611