CN109814303B - Reflective liquid crystal display panel, preparation method thereof and display device - Google Patents
Reflective liquid crystal display panel, preparation method thereof and display device Download PDFInfo
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- CN109814303B CN109814303B CN201910176121.4A CN201910176121A CN109814303B CN 109814303 B CN109814303 B CN 109814303B CN 201910176121 A CN201910176121 A CN 201910176121A CN 109814303 B CN109814303 B CN 109814303B
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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
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- Crystallography & Structural Chemistry (AREA)
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- Optics & Photonics (AREA)
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Abstract
The application provides a reflective liquid crystal display panel, a preparation method thereof and a display device, belongs to the technical field of display, and can solve the problem of yellow pictures of the existing reflective LCD. According to the reflective liquid crystal display panel, the thicknesses of the liquid crystal layers at different positions are adjusted, so that the liquid crystal layers corresponding to the sub-pixels have different phase retardation amounts, and therefore, the predetermined phase compensation is carried out on light in different wave band ranges in the incident light, which is equivalent to the purpose of utilizing the liquid crystal layers with different thicknesses to selectively reflect the incident light and reflect the incident light in a certain wave band range, so that the display effect is adjusted.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a reflective liquid crystal display panel, a preparation method thereof and a display device.
Background
Liquid crystal displays can be classified into transmissive liquid crystal displays, semi-transmissive liquid crystal displays, and reflective liquid crystal displays according to the type of light source used and the manner in which the light source is arranged. In the case of a reflective liquid crystal display, it displays a picture by reflecting ambient light or light emitted from a light source disposed in front of a display panel. The reflective liquid crystal display has the advantages of low power consumption, high aperture ratio, no backlight source and the like, and has great market potential in the fields of electronic books, electronic tags and the like.
The inventor finds that at least the following problems exist in the prior art: the current reflective LCD has the problems of yellow picture and the like. For the problem of yellow picture existing in reflective liquid crystal display, the current common solutions are: 1. and adjusting the color resistance of the Color Film (CF). However, the method is limited by blue photoresist materials and cost, the process is greatly limited, and the adjusting effect is not obvious; 2. dye particles capable of absorbing yellow visible light are added into the pressure-sensitive adhesive structure of the upper polaroid. The method has a certain effect on white picture visual observation, but reduces the overall emergence rate, and improves the cost of the polaroid, so that the product is difficult to have competitiveness in the market.
Disclosure of Invention
The application provides a reflective liquid crystal display panel, a preparation method thereof and a display device, aiming at the problem of yellow picture of the existing reflective LCD.
The technical scheme adopted for solving the technical problems of the application is as follows:
the reflective liquid crystal display panel comprises two opposite substrates and a liquid crystal layer arranged between the first substrate and the second substrate, wherein a reflector is arranged on the second substrate, and a polarizer and a phase delay plate are arranged on the first substrate; wherein a protruding portion is provided on one side of the first substrate or the second substrate near the liquid crystal layer, so that the thickness of the liquid crystal layer at the position where the protruding portion is provided is different from the thickness of the liquid crystal layer at the position where the protruding portion is not provided.
Optionally, the substrate close to the light incident side is a first substrate, the substrate far away from the light incident side is a second substrate, and the protruding portion is disposed on one side of the first substrate close to the liquid crystal layer.
Alternatively, the convex portion includes a plurality of projections protruding toward the liquid crystal layer, the projections being composed of a transparent material.
Optionally, a plurality of protrusions are correspondingly arranged on one sub-pixel.
Optionally, a color film is disposed between the first substrate and the protrusion.
Optionally, in a direction perpendicular to the substrate, a dimension between the protrusion corresponding to the subpixel and the second substrate is d, and a phase retardation re= Δn×d of the liquid crystal layer corresponding to the subpixel, where Δn is a difference between refractive indexes of a major axis and a minor axis of the liquid crystal molecule.
Optionally, the protruding portion is disposed on a side of the second substrate, which is close to the liquid crystal layer, and the reflector is disposed between the protruding portion and the liquid crystal layer.
Optionally, a polarizer is disposed on a side of the first substrate facing away from the liquid crystal layer.
Optionally, the phase retarder includes a 1/2 wave plate and a 1/4 wave plate.
The application also provides a display device which comprises the reflective liquid crystal display panel and a light source arranged on the light emitting side of the reflective liquid crystal display panel.
Drawings
Fig. 1 is a schematic structural diagram of a reflective liquid crystal display panel according to embodiment 1 of the present application;
fig. 2 is a schematic structural diagram of a reflective liquid crystal display panel according to embodiment 2 of the present application;
FIG. 3 is a top view showing the arrangement of protrusions in one sub-pixel according to embodiment 2 of the present application;
FIG. 4 is a top view of a bump arrangement in another sub-pixel according to embodiment 2 of the present application;
fig. 5 is a schematic structural diagram of a reflective liquid crystal display panel according to embodiment 2 of the present application;
FIG. 6 is a schematic diagram of another reflective LCD panel according to embodiment 2 of the present application;
fig. 7 is a schematic structural diagram of a reflective liquid crystal display panel according to another embodiment 2 of the present application;
FIG. 8 is a schematic diagram showing the light propagation of a reflective LCD panel according to embodiment 2 of the present application;
FIG. 9 is a graph showing the relationship between the retardation of the liquid crystal layer of the display panel according to example 2 and the light emission rate of the high band;
FIG. 10 is a graph showing the relationship between retardation of the liquid crystal layer of the display panel according to example 2 and light emission rate of the low band;
FIG. 11 is a graph showing the relationship between retardation of the liquid crystal layer of the display panel according to example 2 and the light emission rate of the full band;
wherein, the reference numerals are as follows: 1. a first substrate; 2. a second substrate; 3. a liquid crystal layer; 4. a reflector; 5. a boss; 51. a protrusion; 6. a sub-pixel; 7. a polarizer; 8. a phase retarder; 81. a 1/2 wave plate; 82. 1/4 wave plate.
Detailed Description
The present application will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present application to those skilled in the art.
Example 1:
the present embodiment provides a reflective liquid crystal display panel, as shown in fig. 1, including a first substrate 1 and a second substrate 2 opposite to each other, and a liquid crystal layer 3 disposed between the first substrate 1 and the second substrate 2, wherein the second substrate 2 is provided with a reflector 4, and the first substrate 1 is provided with a polarizer 7 and a phase retarder 8; wherein, the first base plate 1 or the second base plate 2 is provided with a protruding part 5 near one side of the liquid crystal layer, so that the thickness of the liquid crystal layer at the position where the protruding part 5 is provided is different from the thickness of the liquid crystal layer at the position where the protruding part is not provided.
In the reflective liquid crystal display panel of this embodiment, the thickness of the liquid crystal layer 3 at different positions is adjusted by setting the protruding portion 5, so that the incident light is polarized by the polarizer 7 and then is converted into circularly polarized light by the phase retarder 8, and then is incident on the liquid crystal layer, and the liquid crystal layers with different thicknesses have different phase retardation amounts for the light with different wavelengths because of different thicknesses of the liquid crystal layer 3 corresponding to the sub-pixels, so that the predetermined phase compensation can be selectively performed on the light with different wave band ranges in the incident light, that is, the circularly polarized light with a certain wavelength is still emitted in the form of circularly polarized light after being reflected by the liquid crystal layer 3 and the reflector 4, and the circularly polarized light with other wavelengths is possibly changed into elliptically polarized light by the liquid crystal layer, and the emergence rate is relatively low. The liquid crystal display device is equivalent to utilizing the liquid crystal layers 3 with different thicknesses to selectively reflect incident light with different wavelengths and reflect the incident light with a certain wave band range so as to achieve the purpose of adjusting the display effect.
Example 2:
the present embodiment provides a reflective liquid crystal display panel, as shown in fig. 2, including a first substrate 1 near the light incident side, a second substrate 2 far from the light incident side, and a liquid crystal layer 3 disposed between the two substrates; wherein the second substrate 2 is provided with a reflector 4, and one side of the first substrate 1, which is away from the liquid crystal layer, is provided with a polarizer 7 and a phase retarder 8; wherein, the side of the first substrate 1 near the other substrate is provided with a bulge 5, so that the thickness of the liquid crystal layer at the position where the bulge 5 is arranged is different from the thickness of the liquid crystal layer at the position where the bulge is not arranged.
In fig. 2 disclosed in this embodiment, a protrusion 5 is provided on a side of the first substrate 1 facing the second substrate 2, and the size of the liquid crystal layer 3 in the direction perpendicular to the substrates is defined by the protrusion 5 at different positions. That is, the protrusions 5 are added at positions of the sub-pixel corresponding substrates where phase retardation is required, and due to the presence of the protrusions 5, part of the positions of the liquid crystal layer 3 is occupied, so that the thickness of the liquid crystal layer 3 at the positions having the protrusions 5 is relatively thinned. It should be noted that, a substrate with uneven surface may be directly adopted, or the protruding portion 5 may be added on the surface of the flat substrate, and the principle of changing the thickness of the liquid crystal layer 3 is similar.
The present embodiment is not limited to the specific installation position of the protruding portion 5, and may be provided on either the first substrate 1 or the second substrate 2.
As an alternative embodiment in this example, the convex portion 5 includes a plurality of convex protrusions 51 protruding toward the liquid crystal layer 3, the convex protrusions 51 being composed of a transparent material.
That is, the protrusions 5 are provided on the substrate in the form of protrusions 51 having a dimension d0 (not labeled in the drawing) in a direction perpendicular to the substrate, and the thickness of the liquid crystal layer 3 at the positions where the protrusions are not provided is d1, and the thickness of the liquid crystal layer 3 at the positions where the protrusions are provided is d1-d0. Specifically, the protrusions are made of a transparent material so as not to affect the light emission of the display panel.
In this embodiment, the number of protrusions is not limited, and as shown in fig. 3, only one protrusion may be provided in the area where one sub-pixel 6 is located, or as shown in fig. 4, a plurality of protrusions 51 may be provided in the area where one sub-pixel 6 is located, and the number of protrusions 51 and the area of the protrusions (the area refers to the orthographic projection area of the protrusions to the substrate) may be changed according to a predetermined retardation amount. Specifically, when a plurality of protrusions are disposed in the region where one subpixel is located, the plurality of protrusions are uniformly distributed in the region where the subpixel is located.
The specific size of the protrusions is not limited in this embodiment, and may be changed according to actual needs, and optionally, the sizes of the protrusions corresponding to the sub-pixels of different colors are different in the direction perpendicular to the substrate.
That is, the phase retardation amount can be designed as needed, and it is generally possible to use protrusions of different sizes so that the liquid crystal layers 3 of different thicknesses perform phase compensation for light of a predetermined wavelength band range.
In one embodiment, the phase retarder includes a 1/2 wave plate and a 1/4 wave plate. Specifically, the 1/4 wave plate is disposed closer to the first substrate 1 than the 1/2 wave plate.
As shown in fig. 8, the incident light is polarized by the polarizer 7, then is converted into circularly polarized light by the 1/2 wave plate and the 1/4 wave plate, and then enters the liquid crystal layer, the circularly polarized light with a certain wavelength is reflected by the liquid crystal layer 3 and the reflector 4, and then is still emitted in the form of circularly polarized light, while the circularly polarized light with other wavelengths is possibly changed into elliptically polarized light by the liquid crystal layer, so that the emission rate is relatively low. In order to improve the emission ratio of a specific wavelength, the thickness of the liquid crystal layer and thus the optical path difference of light components of different polarization directions are adjusted by the convex portion provided in the present application so that the elliptically polarized light is adjusted to circularly polarized light when reaching the reflector 4.
In one embodiment, in a direction perpendicular to the substrates, a dimension between the protrusion corresponding to the sub-pixel and the second substrate 2 is d, and a phase retardation amount re= Δn×d of the liquid crystal layer 3 corresponding to the sub-pixel, where Δn is a difference between refractive indexes of a long axis and a short axis of the liquid crystal molecule, and the liquid crystal layer 3 includes liquid crystal molecules.
Taking fig. 5 as an example, the 1/2 wave plate and the 1/4 wave plate are designed for the middle frequency band in the visible light. As can be seen, the thickness (may also be referred to as cell thickness) of the liquid crystal layer 3 in the region of the d1 position is high, the phase retardation re=Δn×d1 of the liquid crystal layer 3 is large, and the emission ratio of the low frequency band light of the incident light at this position is large, as shown in fig. 9: light (e.g., red light) in a wavelength band around 650nm has a higher emission rate at a position where retardation re=300 (emission rate in fig. 9 to 11 refers to a ratio of emitted light to incident light from the display panel). See fig. 10: light (e.g., blue light) in a wavelength band around 450nm has a high emission rate at a position around the retardation re=200. From this, the corresponding liquid crystal layer thickness d2 can be calculated. As can be seen, the phase retardation re=Δnd2 of the liquid crystal required for 450nm light is small, the required cell thickness is low, the liquid crystal layer 3 at this position selectively reflects light in the low band of the incident light, and the optimum retardation is set at a region amount of 180 to 220nm, which has a high exit ratio for light in the band around 450 nm. The proportion of the wavelengths of different wave bands in the reflected light can be adjusted by controlling the duty ratio of d1 and d2 in a single pixel, so that the effect of adjusting the display color is achieved.
In the prior art, the thickness of the liquid crystal layer 3 at each position is constant, so that the emergent rate and contrast ratio of the liquid crystal layer 3 at each position to full-band visible light (380-780 nm) are very high, the difference is small, and the effect of adjusting the display effect cannot be achieved. In the reflective liquid crystal display panel of this embodiment, the thicknesses of the liquid crystal layers 3 at different sub-pixel positions are adjusted to make the liquid crystal layers 3 corresponding to the sub-pixels have different phase retardation amounts, so as to perform predetermined phase compensation on light in different wave band ranges in the incident light, which is equivalent to selectively reflecting the incident light with different wavelengths, and reflecting the incident light in a certain wave band range, thereby achieving the purpose of adjusting the display effect.
In another embodiment, as shown in fig. 6, the protrusion 5 is disposed on a side of the second substrate 2 near the liquid crystal layer 3, and the reflector 4 is disposed between the protrusion 5 and the liquid crystal layer 3.
In this embodiment, the reflector 4 is disposed closer to the liquid crystal layer 3 than the protrusion 5, and the protrusion 5 has no influence on light propagation, so the material of the protrusion 5 is not limited in this embodiment as long as it protrudes toward the liquid crystal layer 3. The number and dimensions of the protruding portions 5 are similar to those of fig. 3 and 4, and will not be described again here.
In one embodiment, a color film is disposed between the first substrate 1 and the protrusion, and the color film and the protrusion are in an integral structure.
That is, the color films of different colors are different in size in the direction perpendicular to the substrate, or the color films of the same color are different in size at different positions. The color film and the bulge are formed by adopting the same material as an integral structure. The advantage of this design is that the preparation process can be simplified.
In the drawings corresponding to the embodiments of the present disclosure, the sizes, thicknesses, and the like of the respective structural layers shown in the drawings are shown only as illustrations. In the process implementation, the projection areas of the structural layers on the substrate can be the same or different, and the required projection areas of the structural layers can be realized through an etching process; meanwhile, the structure shown in the drawings does not limit the geometric shape of each structural layer, for example, the structure can be rectangular as shown in the drawings, trapezoid or other etched shapes, and the structure can be realized by etching.
Example 3:
the present embodiment provides a method for manufacturing a reflective liquid crystal display panel according to the above embodiment, including the following steps:
s01, providing a first substrate; optionally, the first substrate is a color film substrate, and the thicknesses of the color films at different positions on the color film substrate are different, that is, the positions of part of the color films form protrusions, which is equivalent to the color films having the functions of the protruding parts.
S02, providing a second substrate; optionally, the second substrate is an array substrate, and the reflector is formed on the array substrate, and specifically, the step includes the step of forming the reflector on the array substrate; the liquid crystal layer corresponding to a part of the sub-pixels has a different dimension in the direction perpendicular to the substrate than the liquid crystal layers corresponding to other sub-pixels, so that the liquid crystal layer corresponding to a part of the sub-pixels has a phase retardation of a predetermined wavelength range.
In another embodiment, the protruding portion may be formed on one of the substrates, where the protruding portion may be formed on the same substrate as the reflector, and the protruding portion may be formed closer to the substrate than the reflector, so that the material forming the protruding portion may be a transparent material or an opaque material, and the protruding portion does not affect the light reflected by the reflector. If the protruding portion and the reflector are formed on the two substrates respectively, the material forming the protruding portion is a transparent material.
S03, forming a liquid crystal box by oppositely arranging the first substrate and the second substrate; a liquid crystal layer is formed between the two substrates. The material of the liquid crystal layer may be nematic liquid crystal, smectic liquid crystal and cholesteric liquid crystal.
In this embodiment, through various manners, the color film or the protruding portion at a part of the positions occupies a part of the positions of the liquid crystal layer, which is equivalent to adjusting the thickness of the liquid crystal layer at different sub-pixel positions, so that the liquid crystal layer corresponding to the sub-pixel has different phase retardation amounts, thereby performing predetermined phase compensation on light in different wave band ranges in the incident light, which is equivalent to selectively reflecting the incident light by using the liquid crystal layer with different thicknesses, and reflecting the incident light in a certain wave band range, so as to achieve the purpose of adjusting the display effect.
Example 4:
the embodiment provides a display device, which comprises any one of the reflective liquid crystal display panels and a light source arranged on the light emitting side of the reflective liquid crystal display panel. The display device may be: any product or component with display function such as a liquid crystal display panel, electronic paper, mobile phone, tablet computer, television, display, notebook computer, digital photo frame, navigator and the like.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present application, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the application, and are also considered to be within the scope of the application.
Claims (9)
1. The reflective liquid crystal display panel is characterized by comprising a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are opposite to each other, the liquid crystal layer is arranged between the first substrate and the second substrate, a reflector is arranged on the second substrate, and a polarizer and a phase retarder are arranged on the first substrate; wherein a protruding portion is provided on one side of the first substrate or the second substrate near the liquid crystal layer, so that the thickness of the liquid crystal layer at the position where the protruding portion is provided is different from the thickness of the liquid crystal layer at the position where the protruding portion is not provided;
the convex part comprises a plurality of bulges protruding towards the liquid crystal layer, and one sub-pixel is correspondingly provided with a plurality of bulges; a plurality of protrusions corresponding to the same sub-pixel are uniformly distributed in the region where the sub-pixel is located, and the protrusions are separated at intervals; in the direction perpendicular to the substrate, the sizes of the protrusions corresponding to the sub-pixels with different colors are different; the number of the protrusions corresponding to the same sub-pixel and the orthographic projection area of the protrusions in the area where the sub-pixel is located are set according to the phase retardation corresponding to the sub-pixel.
2. The reflective liquid crystal display panel according to claim 1, wherein the substrate near the light incident side is a first substrate, the substrate far from the light incident side is a second substrate, and the protrusion is disposed on a side of the first substrate near the liquid crystal layer.
3. The reflective liquid crystal display panel according to claim 2, wherein the convex portion includes a plurality of projections protruding toward the liquid crystal layer, the projections being composed of a transparent material.
4. The reflective liquid crystal display panel according to claim 3, wherein a color film is disposed between the first substrate and the protrusion.
5. A reflective liquid crystal display panel according to claim 3, wherein the dimension between the protrusions corresponding to the sub-pixels and the second substrate in the direction perpendicular to the substrates is d, and the phase retardation re= Δn of the liquid crystal layer corresponding to the sub-pixels is d, wherein Δn is the difference in refractive index between the major axis and the minor axis of the liquid crystal molecules.
6. The reflective liquid crystal display panel of claim 1, wherein the protrusion is disposed on a side of the second substrate adjacent to the liquid crystal layer, and the reflector is disposed between the protrusion and the liquid crystal layer.
7. The reflective liquid crystal display panel according to claim 2, wherein a polarizer is disposed on a side of the first substrate facing away from the liquid crystal layer.
8. The reflective liquid crystal display panel of claim 2, wherein the phase retarder comprises a 1/2 wave plate and a 1/4 wave plate.
9. A display device comprising the reflective liquid crystal display panel of any one of claims 1 to 8, and a light source provided on a light emitting side of the reflective liquid crystal display panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910176121.4A CN109814303B (en) | 2019-03-08 | 2019-03-08 | Reflective liquid crystal display panel, preparation method thereof and display device |
| PCT/CN2020/077748 WO2020182034A1 (en) | 2019-03-08 | 2020-03-04 | Reflective liquid crystal display panel and manufacturing method therefor, and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910176121.4A CN109814303B (en) | 2019-03-08 | 2019-03-08 | Reflective liquid crystal display panel, preparation method thereof and display device |
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| CN109814303A CN109814303A (en) | 2019-05-28 |
| CN109814303B true CN109814303B (en) | 2023-09-01 |
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| CN109814303B (en) * | 2019-03-08 | 2023-09-01 | 京东方科技集团股份有限公司 | Reflective liquid crystal display panel, preparation method thereof and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425942A (en) * | 2001-12-11 | 2003-06-25 | 富士通显示技术株式会社 | Reflective liquid crystal display and its producing process |
| CN101075026A (en) * | 2006-05-19 | 2007-11-21 | 群康科技(深圳)有限公司 | Semi-pentrating and semi-reflecting liquid-crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102707362B (en) * | 2012-05-21 | 2015-03-18 | 京东方科技集团股份有限公司 | Phase retarder and manufacturing method of phase retarder, polarization phase retarder and display device |
| US9874775B2 (en) * | 2014-05-28 | 2018-01-23 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and electronic device |
| CN107102470A (en) * | 2017-06-12 | 2017-08-29 | 京东方科技集团股份有限公司 | Reflective liquid-crystal display and its manufacture method |
| CN109814303B (en) * | 2019-03-08 | 2023-09-01 | 京东方科技集团股份有限公司 | Reflective liquid crystal display panel, preparation method thereof and display device |
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- 2019-03-08 CN CN201910176121.4A patent/CN109814303B/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425942A (en) * | 2001-12-11 | 2003-06-25 | 富士通显示技术株式会社 | Reflective liquid crystal display and its producing process |
| CN101075026A (en) * | 2006-05-19 | 2007-11-21 | 群康科技(深圳)有限公司 | Semi-pentrating and semi-reflecting liquid-crystal display device |
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| WO2020182034A1 (en) | 2020-09-17 |
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