CN111474799B - Display substrate, manufacturing method thereof and display device - Google Patents
Display substrate, manufacturing method thereof and display device Download PDFInfo
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- CN111474799B CN111474799B CN202010410912.1A CN202010410912A CN111474799B CN 111474799 B CN111474799 B CN 111474799B CN 202010410912 A CN202010410912 A CN 202010410912A CN 111474799 B CN111474799 B CN 111474799B
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- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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- 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
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- 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
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- 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
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- 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
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- G02F1/1333—Constructional arrangements; Manufacturing methods
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- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
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- G—PHYSICS
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- 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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1676—Electrodes
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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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/1677—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present disclosure provides a display substrate, a method of manufacturing the same, and a display device, the display substrate including: a substrate base plate; the color film layer comprises a plurality of color filtering units distributed in an array manner, a matrix opening area is defined between every two adjacent color filtering units, the matrix opening area comprises a plurality of first opening areas and a plurality of second opening areas, the orthographic projection of each first opening area on the substrate is a strip-shaped area extending along the second direction, the first opening areas are filled with black electrophoretic particles, and the second opening areas are filled with light shielding materials; the electrophoresis device comprises a grating layer and a plurality of electrophoresis chambers, wherein the electrophoresis chambers comprise grating chambers and communicated chambers; a transparent drive electrode; in the first state, the black electrophoretic particles move and are arranged in the corresponding first open regions; in the second state, the black electrophoretic particles move and are arranged in the grating cavity. The display substrate, the manufacturing method thereof and the display device provided by the disclosure realize free switching of 2D/3D display modes, enhance the display effect and are simple in manufacturing process.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display substrate, a manufacturing method of the display substrate and a display device.
Background
In recent years, 3D display technology has become a popular technology in the display industry, and especially naked-eye 3D display technology is the direction of ongoing research in the industry. Currently, there are several implementations of naked eye 3D, including: the method is characterized in that the method comprises a grating type (parallax baffle method), a cylindrical lens type, a micro-phase difference plate method, a linear light source illumination method and the like, wherein the light rays of odd and even images are changed by using the grating to respectively reach the left eye and the right eye, so that the stereoscopic vision is formed.
Because the long-time light viewing of 3D can affect the vision of people, people expect that the 3D display screen can realize the switching between 2D/3D, thereby avoiding the damage to human bodies caused by the long-time viewing of 3D modes.
Disclosure of Invention
The embodiment of the disclosure provides a display substrate, a manufacturing method thereof and a display device, which can realize free switching between a 2D display mode and a 3D display mode, can enhance a display effect, and are simple in manufacturing process.
The technical scheme provided by the embodiment of the disclosure is as follows:
a display substrate, comprising:
a base substrate;
the color film layer is arranged on the substrate and comprises a plurality of color filter units distributed in an array manner, a matrix opening area is defined between every two adjacent color filter units, the matrix opening area comprises a plurality of first opening areas and a plurality of second opening areas which are alternately arranged in a first direction, the orthographic projection of each first opening area on the substrate is a strip-shaped area extending in a second direction, the first direction is vertical to the second direction, the first opening areas are filled with black electrophoretic particles, and the second opening areas are filled with light shields;
the grating layer comprises a plurality of electrophoresis cavities which are arranged at intervals along the first direction, and each electrophoresis cavity comprises a grating cavity for forming a grating structure and a communication cavity for communicating the grating cavity with the first opening area;
and a transparent driving electrode for driving the black electrophoretic particles to move;
wherein the display substrate has a first state and a second state;
in the first state, the black electrophoretic particles move and are arranged in the corresponding first opening regions to form a black matrix;
in the second state, the black electrophoretic particles move and are arranged in the grating cavity to form a grating.
Illustratively, an inner diameter width of the first opening region in the first direction is smaller than an inner diameter width of the grating cavity in the first direction.
Illustratively, the inner diameter width of the communicating cavity in the first direction gradually increases from an end near the first opening region to an end near the grating cavity.
In an example, the grating layer is disposed on a side of the color film layer away from the substrate;
or the grating layer is arranged between the color film layer and the substrate base plate.
Illustratively, the transparent driving electrode includes:
the first transparent electrode is positioned on one side of the color film layer, which is far away from the grating layer;
the second transparent electrode is positioned on one side of the grating layer, which is far away from the color film layer;
wherein the first transparent electrode or the second transparent electrode is multiplexed as a common electrode of the display substrate.
Illustratively, the light-shielding material is black electrophoretic particles encapsulated in the second open region;
or the light shield is a resin light shield layer made of a light shield material.
Illustratively, the grating layer further includes a transparent material layer, the electrophoresis cavity is formed in the transparent material layer, and the electrophoresis cavity is filled with an electrophoresis liquid, and refractive indexes of the electrophoresis liquid and the transparent material layer are smaller than a predetermined value.
A display device, comprising: the color film substrate and the array substrate are arranged in a box-to-box mode, and the color film substrate adopts the display substrate; and the liquid crystal layer or the liquid crystal polymer layer is positioned between the color film substrate and the array substrate.
A method of manufacturing a display substrate for manufacturing the display substrate as described above, the method comprising:
forming a color film layer on a substrate, wherein the color film layer comprises a plurality of color filter units distributed in an array, a matrix opening area is defined between adjacent color filter units, the matrix opening area comprises a plurality of first opening areas and a plurality of second opening areas which are alternately arranged in a first direction, the orthographic projection of each first opening area on the substrate is a strip-shaped area extending along a second direction, the first direction is vertical to the second direction, black electrophoretic particles are filled in the first opening areas, and a light shielding material is filled in the second opening areas;
forming a grating layer on a substrate, wherein the grating layer comprises a plurality of electrophoresis cavities which are arranged at intervals along the first direction, black electrophoresis particles are filled in the electrophoresis cavities, and the electrophoresis cavities comprise grating cavities for forming a grating structure and a communication cavity for communicating the grating cavities with the first opening area;
transparent driving electrodes are formed on a base substrate.
For example, when the grating layer is disposed on a side of the color film layer away from the substrate, the method specifically includes:
forming a first transparent electrode on the substrate base plate;
forming a color film layer on the first transparent electrode;
forming the matrix opening area on the color film layer;
filling black electrophoretic particles in the matrix opening area;
forming a transparent material layer on one side of the color film layer, which is far away from the substrate, and etching the electrophoresis cavity on the transparent material layer;
forming a second transparent electrode on one side of the transparent material layer far away from the substrate base plate;
or,
when the grating layer is arranged between the color film layer and the substrate base plate, the method specifically comprises the following steps:
forming a first transparent electrode on the substrate base plate;
forming a transparent material layer on one side of the color film layer, which is far away from the substrate, and etching the electrophoresis cavity on the transparent material layer;
forming a color film layer on one side of the transparent material layer far away from the substrate base plate;
forming the matrix opening area on the color film layer;
filling black electrophoretic particles in the matrix opening area;
and forming a second transparent electrode on one side of the color film layer far away from the substrate base plate.
The beneficial effects brought by the embodiment of the disclosure are as follows:
in the above scheme, a grating layer is additionally arranged on one side of a color film layer of the display substrate, the grating layer includes a series of electrophoresis cavities arranged at intervals, one end of each electrophoresis cavity far away from the color film layer is a grating cavity, the grating cavity is used for forming a grating structure, the electrophoresis cavity further includes a communicating cavity, the communicating cavity is used as a channel and is used for communicating a first opening area at a position corresponding to the electrophoresis cavity in a matrix opening area between the grating cavity and a color filter unit of the color film layer, and black electrophoresis particles are filled in the first opening area, so that free switching between a 2D display mode and a 3D display mode is realized by controlling movement of the black electrophoresis particles in the electrophoresis cavity, wherein in the 2D display mode, the black electrophoresis particles in the electrophoresis cavity are driven to move into the first opening area, so that the black electrophoresis particles can replace a black matrix; in a 3D display mode, by driving black electrophoretic particles to move to the grating cavities of each electrophoresis cavity, the black electrophoretic particles in a series of electrophoresis cavities can jointly form a grating structure; in addition, according to the scheme, the grating is combined with the color film layer, the existing color film and electronic paper process can be adopted, the process can be simplified, and the display effect can be enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a display substrate in a 2D display mode according to an embodiment provided in the present disclosure;
fig. 2 is a schematic structural diagram of a display substrate in a 3D display mode according to an embodiment provided in the present disclosure;
fig. 3 is a schematic optical path diagram illustrating a display substrate for implementing 3D display according to an embodiment provided in the present disclosure;
fig. 4 is a schematic structural diagram of a display substrate in another embodiment provided in the present disclosure in a 2D display mode;
FIG. 5 is a schematic diagram of a step S01 of fabricating the display substrate shown in FIG. 1 according to an embodiment of the disclosure;
fig. 6 is a schematic diagram illustrating a step S03 of fabricating the display substrate shown in fig. 1 according to the embodiment of the disclosure;
FIG. 7 is a schematic diagram of a step S04 of fabricating the display substrate shown in FIG. 1 according to an embodiment of the disclosure;
fig. 8 is a schematic diagram of step S05 of fabricating the display substrate shown in fig. 1 according to the embodiment of the disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Aiming at the problems of complex structure and poor display effect of a 3D display product capable of switching between a 2D display mode and a 3D display mode in the related art, the embodiment of the disclosure provides a display substrate, a manufacturing method thereof and a display device, which can realize free switching between the 2D display mode and the 3D display mode, enhance the display effect and have simple manufacturing process.
As shown in fig. 1 to 4, a display substrate provided in an embodiment of the present disclosure includes:
a base substrate 100;
the color film layer 200 is disposed on the substrate 100, the color film layer 200 includes a plurality of color filter units 210 distributed in an array, a matrix opening area 300 is defined between adjacent color filter units 210, the matrix opening area 300 includes a plurality of first opening areas 310 and a plurality of second opening areas 320 alternately arranged in a first direction X, an orthogonal projection of each first opening area 310 on the substrate 100 is a strip-shaped area extending along a second direction, the first direction X is perpendicular to the second direction, the first opening areas 310 are filled with black electrophoretic particles 400, and the second opening areas 320 are filled with a light-shielding material;
a grating layer 500, wherein the grating layer 500 includes a plurality of electrophoresis cavities 510 arranged at intervals along the first direction X, and the electrophoresis cavities 510 include a grating cavity 511 for forming a grating structure and a communication cavity 512 for communicating the grating cavity 511 with the first opening area 310;
and, a transparent driving electrode for driving the black electrophoretic particles 400 to move;
wherein the display substrate has a first state and a second state;
as shown in fig. 1, in the first state, the black electrophoretic particles 400 move and are arranged in the corresponding first open region 310 to form a black matrix; as shown in fig. 2, in the second state, the black electrophoretic particles 400 move and are arranged in the grating cavity 511 to form a grating.
The display substrate provided in the embodiment of the disclosure may be used as a color filter substrate in a display panel, a matrix opening area 300 is formed between color filter units 210 of a color filter layer 200 (the matrix opening area 300 is an area where a black matrix of an existing color filter substrate is located), a grating layer 500 is additionally provided on one side of the color filter layer 200, the grating layer 500 includes a series of electrophoresis cavities 510 arranged at intervals, one end of the electrophoresis cavity 510 away from the color filter layer 200 is a grating cavity 511 for forming a grating structure, the electrophoresis cavity 510 further includes a communication cavity 512, the communication cavity 512 is used as a channel for communicating the grating cavity 511 with a first opening area 310 at a position corresponding to the electrophoresis cavity 510 in the matrix opening area 300 between the color filter units 210 of the color filter layer 200, the black electrophoresis cavity 400 is filled in the first opening area 310, a light-shielding substance is filled in the second opening area 320, and free switching between a 2D display mode and a 3D display mode is realized by controlling movement of the black electrophoresis particles 400 in the electrophoresis cavity 510,
as shown in fig. 1, in the 2D display mode, the black electrophoretic particles 400 in the electrophoretic cavity 510 are driven to move into the first open region 310, so that the black electrophoretic particles 400 in the first open region 310 and the light-shielding material in the second open region 320 together form a black matrix of the color film substrate, that is, the black electrophoretic particles 400 replace the black matrix on the color film substrate in the related art;
as shown in fig. 2, in the 3D display mode, by driving the black electrophoretic particles 400 to move to the grating cavities 511 of each of the electrophoretic cavities 510, the black electrophoretic particles 400 are distributed in the grating cavities 511 in a series of electrophoretic cavities 510, so as to form a grating structure.
Therefore, in the display substrate provided in the embodiment of the present disclosure, the grating is combined with the color film layer 200, that is, the black electrophoretic particles 400 in the electrophoretic cavity 510 are multiplexed, the black electrophoretic particles 400 may replace a black matrix of the color film substrate in the 2D mode, and the black electrophoretic particles 400 may replace a grating structure in the 3D mode, and the structure may be combined by using the existing color film and electronic paper process, so that the process is simplified, and the display effect is enhanced.
It should be noted that the display substrate provided in the embodiment of the present disclosure may be used as a color filter substrate, and paired with an array substrate to form a liquid crystal display panel, but the present disclosure is not limited thereto, and the display substrate may also be other types of display substrates.
The display substrate provided by the embodiments of the present disclosure is described in more detail below.
In some embodiments, as shown in fig. 1 to 4, an inner diameter width of the first opening region 310 in the first direction X is smaller than an inner diameter width of the grating cavity 511 in the first direction X.
By adopting the above scheme, as shown in fig. 1 to 4, the inner diameter width of the first opening region 310 in the first direction X is smaller than the inner diameter width of the grating cavity 511 in the first direction X, which is designed by combining the optical path principle of 3D display, generally, the grating width in the grating structure for 3D display is larger than the width of the black matrix, and the design of specific parameters can be selected according to actual needs.
As shown in fig. 1, in some embodiments, the grating layer 500 is disposed on a side of the color film layer 200 away from the substrate base plate 100. In addition, as shown in fig. 4, in other embodiments, the grating layer 500 may be further disposed between the color film layer 200 and the substrate 100.
In some exemplary embodiments, as shown in fig. 1 to 4, the grating layer 500 further includes a transparent material layer 520, the electrophoresis cavity 510 is formed in the transparent material layer 520, and an electrophoresis liquid is filled in the electrophoresis cavity 510, and refractive indexes of the electrophoresis liquid and the transparent material layer 520 are smaller than a predetermined value.
By adopting the above scheme, the grating layer 500 is made of a transparent material layer 520, wherein the electrophoretic cavity 510 is formed in the transparent material layer 520 by using a process such as etching, and the electrophoretic cavity 510 is filled with an electrophoretic fluid, and the refractive indexes of the electrophoretic fluid and the transparent material layer 520 are smaller than a predetermined value, where the refractive indexes of the electrophoretic fluid and the transparent material layer 520 are smaller than the predetermined value, that is, the predetermined value is a value equal to or close to 0, and the specific value can be selected according to practical applications, meaning that the refractive indexes of the electrophoretic fluid in the electrophoretic cavity 510 and the transparent material layer 520 of the grating layer 500 are close to each other, so as to avoid light refraction at an interface between the electrophoretic fluid and the transparent material layer 520, for example, the transparent material layer 520 may be made of PVX, that is silicon nitride, and the refractive index thereof is related to a process condition when the transparent material layer 520 is formed by using PECVD (plasma enhanced chemical vapor deposition), generally about 1.9 to 2.3, and the electrophoretic fluid may be made of tetrachloroethylene, and the refractive index of the electrophoretic fluid may be adjusted by adjusting the refractive index of the transparent material layer 520 by using chlorotrifluoroethylene as a medium, and may be the same as the electrophoretic fluid, or the electrophoretic fluid.
The material of the transparent material layer 520 and the material of the electrophoretic fluid may be selected according to the practical application, which is only an example and not limited thereto.
In addition, taking the embodiment shown in fig. 2 as an example, the grating layer 500 in the display substrate is disposed on a side of the color film layer 200 away from the substrate 100, and specific optical paths and parameter relationships in the 3D display mode are as follows:
when the display substrate in the embodiment of the present disclosure is in the 3D display mode, the light path diagram is as shown in fig. 3, where the pixel width of the color filter unit 210 is P, the distance between the grating and the color film layer 200 is H, the grating distance in the grating layer 500 is W, the pixel pitch of the color filter unit 210 is O, the optimal viewing distance is S, the pupil pitch is L, and the relationship between specific structural parameters is as follows:
from the formulae (I), (II) and (III):
in addition, in practical application, in consideration of the principle of light path refraction, the transparent material layer 520 of the grating layer 500 is made of a material having a larger relative refractive index (for example, the relative refractive index is 2) than the color film layer 200, and the distance H between the transparent material layer 520 of the grating layer 500 and the color film layer 200 can be reduced as much as possible to save materials, where the relationship between H and H is shown in formula (VI), in fig. 3, reference numeral 500 denotes a proposed grating layer, and reference numeral 500' denotes an actual grating layer in consideration of light refraction.
In an exemplary embodiment, the relative refractive index of the transparent material layer 520 of the grating layer 500 and the color film layer 200 is 2, the pixel width P of the color filter unit 210 is 60 μm, the distance H between the grating and the color film layer 200 is 220 μm, the grating distance W in the grating layer 500 is 60 μm, the pixel pitch O between the color filter units 210 is 15 μm, the distance H between the transparent material layer 520 of the grating layer 500 and the color film layer 200 is 105.1 μm, the optimal viewing distance S is 25cm, and the pupil pitch L is 85mm.
It should be understood that the above is only an example, and in practical applications, parameters such as the height h of the gap between the grating layer 500 and the color film layer 200 and the distance W between adjacent gratings in the grating layer 500 can be calculated through the optical path diagram according to the optimal viewing distance S and the interpupillary distance L.
Further, in some exemplary embodiments, the inner diameter width of the communicating cavity 512 in the first direction X gradually increases from an end near the first opening region 310 to an end near the grating cavity 511.
With the above-mentioned solution, the first opening region 310 is communicated with the grating cavity 511 of the electrophoresis cavity 510 through the communication cavity 512, and because the inner diameter widths of the first opening region 310 and the grating cavity 511 in the first direction X are different, the communication cavity 512 may be designed as a convex-mesa-shaped channel whose inner diameter is gradually increased from a side close to the first opening region 310 to a side close to the grating cavity 511, for example, as shown in the figure, the communication cavity 512 may be a convex-mesa-shaped channel whose cross-sectional shape is trapezoidal in a direction perpendicular to the substrate base plate 100 and parallel to the first direction X.
The advantages of such a design are: the inner diameter of the communicating cavity 512 is gradually increased, so that the inner sidewall of the communicating cavity 512 is a smooth linear transition surface, which makes the black electrophoretic particles 400 pass through easily and also ensures that the black electrophoretic particles 400 are distributed in the grating cavity 511 more uniformly and stably in the 3D display mode.
It should be noted that, in practical applications, the specific structure of the electrophoresis chamber 510 is not limited thereto.
Further, in some embodiments, as shown in fig. 1, the transparent driving electrode includes:
the first transparent electrode 610 is positioned on one side of the color film layer 200 far away from the grating layer 500;
the second transparent electrode 620 is positioned on one side of the grating layer 500 far away from the color film layer 200;
wherein the first transparent electrode 610 or the second transparent electrode 620 is multiplexed as a common electrode of the display substrate.
In the above scheme, the display substrate may be used as a color film substrate of a liquid crystal panel, and the common electrode for driving liquid crystal molecules to twist is multiplexed as an electrode for driving the black electrophoretic particles 400, so that, in the manufacturing process of the display substrate, on the basis of the existing process, an electrode layer (for example, a transparent ITO is selected to manufacture a transparent driving electrode) may be further added on the substrate 100 to cooperate with the common electrode layer on the color film substrate, thereby realizing control of the black electrophoretic particles 400 in the electrophoretic liquid, and the manufacturing process is simple and the structure is simple.
It is of course understood that the transparent driving electrode may also be a separately provided electrode layer instead of multiplexing the common electrode.
In addition, in an embodiment, the first transparent electrode 610 is a planar electrode that covers the entire surface of the substrate 100, and may be reused as a common electrode of the display substrate, the second transparent electrode 620 may be a plurality of electrode blocks, and each electrode block is disposed corresponding to one of the electrophoresis chambers 510, or the second transparent electrode 620 may also be a planar electrode that covers the display area of the entire display substrate.
In addition, it should be noted that, in the display substrate provided in the embodiment of the present disclosure, each electrophoresis cavity 510 may be a cavity structure extending along the second direction and having a strip shape as a whole, and correspondingly, each first opening region 310 may be an opening region extending along the second direction and having a strip shape as a whole; it may also be that each of the electrophoresis chambers 510 includes a plurality of sub-chambers arranged in a row along the first direction X, and each of the first opening regions 310 includes a plurality of sub-opening regions arranged in a row along the first direction X, and each of the sub-opening regions is correspondingly communicated with one of the sub-chambers, so as to be more beneficial to uniform distribution of the black electrophoresis particles 400.
In addition, in an exemplary embodiment, the light-shielding material is the black electrophoretic particles 400 encapsulated in the second opening area 320, that is, in the matrix opening area 300, the second opening area 320 not connected to the electrophoretic cavity 510 may be directly filled with the black electrophoretic particles 400, and the black electrophoretic particles 400 are encapsulated to form a black matrix, so that the black electrophoretic particles 400 may be simultaneously filled in the first opening area 310 and the second opening area 320 through the same process when the display substrate is manufactured, and the process is simple.
It is understood that, in other embodiments, the light-shielding object may also be a resin light-shielding layer made of other light-shielding materials. For example, the second opening area 320 may be a black matrix material of an existing color filter substrate to shield light.
In addition, as shown in fig. 1 to 4, an embodiment of the present disclosure further provides a display device, including: the display substrate comprises a color film substrate and an array substrate 10 which are arranged in an opposite box manner, wherein the color film substrate adopts the display substrate provided by the embodiment of the disclosure; and a liquid crystal layer or a liquid crystal polymer layer 20 located between the color film substrate and the array substrate 10.
Obviously, the display device provided in the embodiment of the present disclosure may also bring about the beneficial effects brought by the display substrate provided in the embodiment of the present disclosure, and details are not repeated herein.
The display device can be various display devices such as a mobile phone, a tablet, a computer and a television.
In addition, the embodiment of the present disclosure further provides a method for manufacturing a display substrate, for manufacturing the display substrate provided by the embodiment of the present disclosure, the method includes:
forming a color film layer 200 on a substrate 100, where the color film layer 200 includes a plurality of color filter units 210 distributed in an array, a matrix opening area 300 is defined between adjacent color filter units 210, the matrix opening area 300 includes a plurality of first opening areas 310 and a plurality of second opening areas 320 alternately arranged in a first direction X, a forward projection of each first opening area 310 on the substrate 100 is a strip-shaped area extending along a second direction, the first direction X is perpendicular to the second direction, the first opening areas 310 are filled with black electrophoretic particles 400, and the second opening areas 320 are filled with a light shielding material;
forming a grating layer 500 on a substrate 100, where the grating layer 500 includes a plurality of electrophoresis cavities 510 arranged at intervals along the first direction X, the electrophoresis cavities 510 are filled with black electrophoretic particles 400, and each electrophoresis cavity 510 includes a grating cavity 511 for forming a grating structure, and a communication cavity 512 for communicating the grating cavity 511 with the first opening region 310;
transparent driving electrodes for driving the black electrophoretic particles 400 to move are formed on the substrate 100.
In some embodiments, when the method is used to manufacture the display substrate shown in fig. 1, and at this time, when the grating layer 500 is disposed on the side of the color film layer 200 away from the substrate 100, the method specifically includes:
step S01, as shown in fig. 5, forming a first transparent electrode 610 on the base substrate 100;
step S02, forming a color film layer 200 on the first transparent electrode 610;
step S03, as shown in fig. 6, forming the matrix opening area 300 on the color film layer 200;
step S04, as shown in FIG. 7, filling the black electrophoretic particles 400 in the matrix opening area 300;
step S05, as shown in fig. 8, forming a transparent material layer 520 on a side of the color film layer 200 away from the substrate base plate 100, and etching the electrophoresis chamber 510 on the transparent material layer 520;
in step S06, as shown in fig. 1, a second transparent electrode 620 is formed on a side of the transparent material layer 520 away from the substrate 100.
In step S01, the first transparent electrode 610 may be a common electrode, which may be a planar electrode.
In the step S02, the color film layer 200 is formed on the first transparent electrode 610, and a whole film layer structure may be formed by using a color film manufacturing process, for example, the color film layer 200 is deposited in a PEVCD manner.
In the step S03, the matrix opening area 300 may be formed on the color film layer 200 by etching.
In the step S04, the black electrophoretic particles 400 may be simultaneously filled in the first open region 310 and the second open region 320 by one process to simplify the process; alternatively, the black electrophoretic particles 400 may be filled only in the first open region 310, and a light shield may be formed in the second open region 320.
In the step S05, a PEVCD process may be used to form the entire transparent material layer 520, and the electrophoretic cavity 510 is etched by an etching process, and the black electrophoretic particles 400 in the second opening area 320 may be encapsulated by the transparent material layer 520.
In the step S06, when the second transparent electrode 620 is formed on the side of the transparent material layer 520 away from the substrate 100, the second transparent electrode 620 may be a planar electrode covering the entire display area of the display substrate, or may be a plurality of electrode blocks disposed corresponding to the electrophoresis chambers 510.
In some embodiments, when the method is used for manufacturing the display substrate as shown in the figure, and at this time, when the grating layer 500 is disposed between the color film layer 200 and the substrate 100, the method specifically includes:
step S11, forming a first transparent electrode 610 on the base substrate 100;
step S12, forming a transparent material layer 520 on a side of the color film layer 200 away from the substrate base plate 100, and etching the electrophoresis chamber 510 on the transparent material layer 520;
step S13, forming a color film layer 200 on one side of the transparent material layer 520 away from the substrate base plate 100;
step S14, forming the matrix opening area 300 on the color film layer 200;
step S15, filling black electrophoretic particles 400 in the matrix opening area 300;
step S16, forming a second transparent electrode 620 on a side of the color film layer 200 away from the substrate base plate 100.
In step S11, the first transparent electrode 610 may be a common electrode, which may be a planar electrode.
In the step S12, a PEVCD process may be used to form the whole transparent material layer 520, and the electrophoretic cavity 510 is etched by an etching process, and the black electrophoretic particles 400 in the second opening area 320 may be encapsulated by the transparent material layer 520.
In the step S13, the color film layer 200 is formed on the first transparent electrode 610, and a whole film layer structure may be formed by using a color film manufacturing process, for example, the color film layer 200 is deposited in a PEVCD manner.
In the step S14, the matrix opening area 300 may be formed on the color film layer 200 by etching.
In the step S15, the black electrophoretic particles 400 may be simultaneously filled in the first open region 310 and the second open region 320 by one process to simplify the process; alternatively, the black electrophoretic particles 400 may be filled only in the first open region 310, and a light shield may be formed in the second open region 320.
In step S16, when the second transparent electrode 620 is formed on the side of the transparent material layer 520 away from the base substrate 100, the second transparent electrode 620 may be a planar electrode covering the entire display area of the display substrate, or may be a plurality of electrode blocks provided corresponding to the respective electrophoresis chambers 510.
The following points need to be explained:
(1) The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.
Claims (10)
1. A display substrate, comprising:
a base substrate;
the color film layer is arranged on the substrate and comprises a plurality of color filtering units distributed in an array manner, a matrix opening area is defined between every two adjacent color filtering units and comprises a plurality of first opening areas and a plurality of second opening areas which are alternately arranged in a first direction, the orthographic projection of each first opening area on the substrate is a strip-shaped area extending along a second direction, the first direction is vertical to the second direction, the first opening areas are filled with black electrophoretic particles, and the second opening areas are filled with light shields;
the grating layer comprises a plurality of electrophoresis cavities which are arranged at intervals along the first direction, and each electrophoresis cavity comprises a grating cavity for forming a grating structure and a communication cavity for communicating the grating cavity with the first opening area; the grating layer is in contact with the color film layer;
and a transparent driving electrode for driving the black electrophoretic particles to move;
wherein the display substrate has a first state and a second state;
in the first state, the black electrophoretic particles move and are arranged in the corresponding first opening regions to form a black matrix;
in the second state, the black electrophoretic particles move and are arranged in the grating cavity to form a grating.
2. The display substrate of claim 1,
the inner diameter width of the first opening area in the first direction is smaller than the inner diameter width of the grating cavity in the first direction.
3. The display substrate of claim 2,
the inner diameter width of the communication cavity in the first direction is gradually increased from one end close to the first opening area to one end close to the grating cavity.
4. The display substrate of claim 1,
the grating layer is arranged on one side of the color film layer far away from the substrate base plate;
or the grating layer is arranged between the color film layer and the substrate base plate.
5. The display substrate of claim 1,
the transparent driving electrode includes:
the first transparent electrode is positioned on one side of the color film layer, which is far away from the grating layer;
the second transparent electrode is positioned on one side of the grating layer, which is far away from the color film layer;
wherein the first transparent electrode or the second transparent electrode is multiplexed as a common electrode of the display substrate.
6. The display substrate of claim 1,
the light shield is black electrophoretic particles packaged in the second opening area;
or the light shield is a resin light shield layer made of a light shield material.
7. The display substrate of claim 1,
the grating layer further comprises a transparent material layer, the electrophoresis cavity is formed in the transparent material layer, electrophoresis liquid is filled in the electrophoresis cavity, and the refractive index of the electrophoresis liquid and the refractive index of the transparent material layer are smaller than a preset value.
8. A display device, comprising: a color film substrate and an array substrate which are arranged in a box-to-box manner, wherein the color film substrate adopts the display substrate as claimed in any one of claims 1 to 7; and the liquid crystal layer or the liquid crystal polymer layer is positioned between the color film substrate and the array substrate.
9. A method for manufacturing a display substrate, for manufacturing the display substrate according to any one of claims 1 to 7, the method comprising:
forming a color film layer on a substrate, wherein the color film layer comprises a plurality of color filter units distributed in an array, a matrix opening area is defined between adjacent color filter units, the matrix opening area comprises a plurality of first opening areas and a plurality of second opening areas which are alternately arranged in a first direction, the orthographic projection of each first opening area on the substrate is a strip-shaped area extending along a second direction, the first direction is vertical to the second direction, black electrophoretic particles are filled in the first opening areas, and light shielding materials are filled in the second opening areas;
forming a grating layer on a substrate, wherein the grating layer comprises a plurality of electrophoresis cavities which are arranged at intervals along the first direction, black electrophoresis particles are filled in the electrophoresis cavities, and the electrophoresis cavities comprise a grating cavity for forming a grating structure and a communication cavity for communicating the grating cavity with the first opening area;
and forming a transparent driving electrode for driving the black electrophoretic particles to move on the substrate.
10. The method of claim 9,
when the grating layer is arranged on one side of the color film layer far away from the substrate base plate, the method specifically comprises the following steps:
forming a first transparent electrode on the substrate base plate;
forming a color film layer on the first transparent electrode;
forming the matrix opening area on the color film layer;
filling black electrophoretic particles in the matrix opening area;
forming a transparent material layer on one side of the color film layer, which is far away from the substrate base plate, and etching the electrophoresis cavity on the transparent material layer;
forming a second transparent electrode on one side of the transparent material layer far away from the substrate base plate;
or,
when the grating layer is arranged between the color film layer and the substrate base plate, the method specifically comprises the following steps:
forming a first transparent electrode on the substrate base plate;
forming a transparent material layer on one side of the color film layer, which is far away from the substrate base plate, and etching the electrophoresis cavity on the transparent material layer;
forming a color film layer on one side of the transparent material layer far away from the substrate base plate;
forming the matrix opening area on the color film layer;
filling black electrophoretic particles in the matrix opening area;
and forming a second transparent electrode on one side of the color film layer far away from the substrate base plate.
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