CN110515246B - Multi-color liquid crystal display screen with stacked common substrate - Google Patents
Multi-color liquid crystal display screen with stacked common substrate Download PDFInfo
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- CN110515246B CN110515246B CN201910929361.7A CN201910929361A CN110515246B CN 110515246 B CN110515246 B CN 110515246B CN 201910929361 A CN201910929361 A CN 201910929361A CN 110515246 B CN110515246 B CN 110515246B
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- 239000000758 substrate Substances 0.000 title claims abstract description 144
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Classifications
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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
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
-
- 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
- G02F1/1343—Electrodes
-
- 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
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
-
- 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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a multi-color liquid crystal display screen with a stacked common substrate, which comprises: a display part including a multilayer transparent substrate, an electrode layer, a cholesterol liquid crystal layer, a frame adhesive, a superposition layer and a light absorption layer; the circuit connecting component comprises vertical conductive adhesive, electrode wires and a flexible circuit board; electrode layers and frame glue for preventing liquid crystal leakage are arranged on the surfaces of the multilayer transparent substrate layers opposite to the layers, and cholesterol liquid crystal layers are arranged between the electrode layers; the multilayer transparent substrate includes: an upper transparent substrate, a plurality of groups of middle transparent substrates and a bottom transparent substrate; the multicolor liquid crystal display screen uses a common substrate structure, so that the thickness and weight of the display screen are reduced, and the problem of waste of optical utilization rate is solved; the upper substrate electrode layer and the lower substrate electrode layer are connected through the vertical conductive adhesive bridge, so that the terminal framework of the upper electrode and the lower electrode of the display screen is shared, the single-side flexible circuit board and the driving chip are electrically connected by matching with the special-shaped combining protrusions, and the display screen has the characteristic of a narrow frame.
Description
Technical Field
The invention is applied to the field of cholesterol liquid crystal display screens, in particular to a stacked type common-substrate colorful liquid crystal display screen.
Background
In response to environmental protection and power saving issues, electronic paper technology has become one of the main flows of display screen development. The development goal of electronic paper is mainly to achieve the directional characteristics of electricity saving, convenient carrying, colorful, quick data updating, and the like. And thus a great deal of opportunities for use in newspaper, magazine, book, textbook, advertisement, billboard, volume label, etc. product applications.
The display technology with bistable display characteristics is mainly used as development emphasis, so that the bistable display technology can maintain a display picture, does not consume redundant electric energy, only needs electric energy when replacing the picture, and can realize low-power consumption performance in application. The existing bistable display technology is mainly divided into 2 technical directions of particle type and liquid crystal type, the particle type is mainly divided into EPD (Electrophoretic Display) technology, the liquid crystal type is mainly divided into cholesterol liquid crystal (Cholesteric Liquid Crystal) technology, and the cholesterol liquid crystal technology is considered to have the largest market potential because of being most compatible with the existing production and manufacturing modes of the liquid crystal display screen (Liquid Crystal Display).
The cholesterol liquid crystal is a liquid crystal material which adopts liquid crystal molecules to form spiral lamellar arrangement, when the liquid crystal is arranged in each spiral rotation of 360 degrees, a required distance is called a pitch, and the pitch of the cholesterol liquid crystal can be changed by adjusting the composition of the liquid crystal material.
Cholesteric liquid crystals have bistable properties, i.e. in the natural state there are two stable states (no voltage maintenance is required), one of which is planar helical (planar state), the other is focal conic (focal conic state), and the other is temporary and vertical (homeotropic state). Under the operation of electric fields with different voltages and periodic frequencies, the axial direction of a spiral structure of the cholesterol liquid crystal can be correspondingly changed, and a reflected or transmitted light result is obtained. When the visible light is incident in a planar spiral state (planar state), the incident light can be reflected because the liquid crystal molecules are orderly arranged, when the visible light is incident in a focal conic state (focal conic state), the incident light is slightly scattered because of disordered arrangement of the liquid crystal molecules, most of the incident light can penetrate, and when the visible light is in a vertical state (homeotropic state), all the liquid crystal molecules are arranged along the direction of an electric field and are vertically arranged with the substrate, so that the incident light can not be reflected or scattered through the liquid crystal layer. Therefore, the principle of the cholesterol liquid crystal display screen is to use two different polarized light rotation states of cholesterol liquid crystal molecules under different electric potentials to achieve the reflecting and transmitting display effects.
The color of light reflected by the visible light in the cholesteric liquid crystal display is determined by the pitch characteristics of the cholesteric liquid crystal, and according to one of the biggest features of the cholesteric liquid crystal display, the reflection light effects of different wavelength colors can be obtained by adjusting the pitch characteristics of the liquid crystal material. For example, when the pitch characteristics of the liquid crystal material are adjusted so that the blue light has constructive interference, the blue light can be reflected, and when the red light has constructive interference, the red light can be reflected.
The most common colorful cholesterol liquid crystal display technology at present is to use cholesterol liquid crystal screens with different reflected lights to be stacked so as to achieve the full-color effect. For example, from top to bottom, the first liquid crystal screen uses blue reflective light liquid crystal material, the second liquid crystal screen uses green reflective light liquid crystal material, the third liquid crystal screen uses red reflective light liquid crystal material, the bottom is a light absorbing layer, and each overlapping layer between different liquid crystal screens and light absorbing layers can be bonded by using transparent optical adhesive or directly overlapped; when a white picture is to be displayed, the first liquid crystal screen, the second liquid crystal screen and the third liquid crystal screen are driven to a planar spiral state (planar state), so that the three liquid crystal screens reflect blue/green/red light simultaneously, and a white picture can be formed; on the contrary, when a black picture is displayed, only the first liquid crystal screen, the second liquid crystal screen and the third liquid crystal screen are driven to a focal conic state (focal conic state), and light rays are absorbed by the bottom light absorption layer due to the relation of penetrating light, so that a reflected light path is not seen, and a black picture effect can be obtained; when a red picture is to be displayed, driving the first liquid crystal screen and the second liquid crystal screen to a focal conic state (focal conic state), and driving the third liquid crystal screen to a planar spiral state (planar state); red light is reflected to form a red picture; if a yellow picture is to be displayed, the second and third liquid crystal panels are driven to a planar spiral state (planar state), and the reflected green and red lights can achieve the yellow picture effect by the light mixing principle as long as the first liquid crystal panel is driven to a focal conic state (focal conic state); if a purple picture is to be displayed, the first liquid crystal screen and the third liquid crystal screen are driven to a planar spiral state (planar state), and the reflected blue and red light can achieve the purple picture effect by the light mixing principle as long as the second liquid crystal screen is driven to a focal conic state (focal conic state); and so on, different colors may be displayed in combination.
In view of the foregoing, it is apparent that the cholesterol liquid crystal display technology has four biggest features, namely, the bistable state is supported, the display screen can be maintained unchanged when no electric field is provided, and thus the cholesterol liquid crystal display technology has excellent power saving effect, and secondly, the cholesterol liquid crystal display technology can obtain reflected light with different colors by changing the liquid crystal components to reflect incident light with different wavelengths, and different colors can be displayed without adding additional color parts, so the cholesterol liquid crystal display technology is easy to realize colorization compared with other electronic paper technologies. Thirdly, because the light source adopts a reading mode that the reflective panel is close to paper, eye fatigue is not easy to cause, the light source is very suitable for long-time reading of electronic books and other applications, and the light source is in an integral structure mode, and is close to the existing LCD display screen manufacturing flow, and additional new or expensive equipment is not needed to realize.
The existing stack-type colorful cholesterol liquid crystal display technology has three defects: firstly, because of the use of a plurality of stacked LCD panels, the LCD panels will be heavier than other display technologies, wherein the substrate with the greatest thickness specific gravity has the greatest influence, for example, when 3 LCD panel stacked structures are used, 6 panels are used in total, and compared with a common LCD panel, a stacked multi-color cholesterol LCD panel will have at least 4 more thickness and weight of the substrate, and if the substrate is a glass substrate with the thickness of 0.5mm, the thickness and the relative size and weight influence of at least 2mm are increased correspondingly; secondly, because of the use of a stack of multiple lcd panels, there is a superimposed interface between the different lcd panels and the light absorbing layer, for incident light, the internal reflection of each interface will cause a loss in optical utilization due to the discontinuous refractive index difference of the materials, and the superimposed layers, if bonded with transparent optical adhesive, will be relatively expensive, but because the refractive index difference between the optical adhesive and the glass is relatively small (the refractive index of the glass is about 1.5, the refractive index of the optical adhesive is about 1.47-1.51), generally, the resulting interface reflection loss will be relatively low; in addition, if the stacked layers are directly stacked, although the operation is simple and the cost is low, because the refractive index of the gap air is low (the refractive index of the glass is about 1.5, and the refractive index of the air is 1), the internal interface reflection loss will be large, and taking a glass-off substrate as an example, when the stacked layers are directly stacked, 8% of internal reflection loss exists at each date of the stacked layer interfaces between the stacked liquid crystal display screens (the reflection loss of light entering the air from the glass is 4% and the reflection loss of the light entering the glass is 4%) and the problem that the optical utilization loss exists at the stacked layer interfaces between the lowest liquid crystal display screen and the light absorbing layer due to the fact that the effect of the internal reflection loss is small due to the characteristic of the light absorbing layer is that the interface refractive index difference caused by the traditional stacked liquid crystal display screen is any matter; thirdly, because of using a plurality of liquid crystal display stacks, each liquid crystal display needs to conduct signals to the electrodes of the upper substrate and the lower substrate, and is connected with the flexible circuit board and the driving chip for convenient driving control, the manufacturing process and the structure are complicated, and the biggest problem is that the narrow frame characteristics are difficult to obtain, and at least two side frames are affected (opposite sides or adjacent sides).
Disclosure of Invention
The invention aims to solve the technical problems of heavy weight, complex structure and low optical utilization rate of the conventional stacked multi-color cholesterol liquid crystal display screen technology by improving the stacking mode and reducing the number of transparent substrates in a common substrate mode.
In order to solve the above technical problems, a stacked common-substrate multi-color liquid crystal display of the present invention includes:
a display part including a multilayer transparent substrate, an electrode layer, a cholesterol liquid crystal layer, a frame adhesive, a superposition layer and a light absorption layer; and
the circuit connecting part comprises vertical conductive adhesive, electrode wires, a flexible circuit board and a driving chip;
electrode layers are arranged on the surfaces of the multilayer transparent substrate layers opposite to the layers,
the electrode layer comprises a lower electrode layer a positioned on the lower surface of the multilayer transparent substrate and an upper electrode layer b positioned on the upper surface of the multilayer transparent substrate,
cholesterol liquid crystal layers are arranged between the opposite electrode layers;
frame glue for preventing liquid crystal leakage is arranged between the layers of the multilayer transparent substrate,
the frame glue is arranged on the outer side of the cholesterol liquid crystal layer;
the multilayer transparent substrate includes: an upper transparent substrate, a plurality of groups of middle transparent substrates and a bottom transparent substrate,
an overlapped layer is arranged on the bottom surface of the bottom transparent substrate,
the lower surface of the superposition layer is provided with a light absorption layer;
one side or two sides of the lower electrode layer a positioned on the lower surfaces of the upper transparent substrate and the plurality of groups of intermediate transparent substrates extend to the outer side of the frame glue, and the lower surfaces of the extending ends of the lower electrode layers are electrically connected with vertical conductive glue, and the electrical connection adopts the prior art;
electrode wires are arranged around the electrode layers on the upper surfaces of the plurality of groups of intermediate layer transparent substrates and the bottom layer transparent substrates, and the upper electrode layers b of the electrode wires are electrically connected with the electrode wires, wherein the electrical connection adopts the prior art;
the vertical conductive adhesive is also electrically connected with the electrode wiring below the vertical conductive adhesive, and the electrical connection adopts the prior art, so that one end of the lower electrode layer positioned on the lower surface of the multilayer transparent substrate can be electrically controlled by the vertical conductive adhesive and the upper electrode layer positioned on the upper surface of the multilayer transparent substrate together by using the electrode wiring on the upper surface of the multilayer transparent substrate;
the upper part of the electrode wire tail end is provided with vertical conductive adhesive which is electrically connected with the electrode wire tail end;
an intermediate layer combining protrusion is arranged on one side of the plurality of groups of intermediate layer transparent substrates;
a bottom layer combining protrusion is arranged on one side of the bottom layer transparent substrate;
the upper surfaces of the middle layer bonding bulge and the bottom layer bonding bulge are respectively provided with a flexible circuit board and a driving chip, and the two are electrically connected with the electrode wire through the vertical conductive adhesive;
one end of the flexible circuit board is electrically connected with the vertical conductive adhesive at the tail end of the electrode wire, and the other end of the flexible circuit board is electrically connected with an external host or a control main board.
Through the common substrate architecture, an electrode layer, a cholesterol liquid crystal layer and frame glue are arranged between the layers of the multi-layer transparent substrate, so that a plurality of groups of liquid crystal screens respectively composed of two groups of transparent substrates share the transparent substrate, for example, the upper substrate of a second liquid crystal screen shares the lower substrate with the first liquid crystal screen, the lower substrate of the second liquid crystal screen shares the upper substrate with the third liquid crystal screen, the number of the transparent substrates in the colorful liquid crystal display screen is successfully reduced through the common substrate architecture, the original plurality of groups of superimposed layers are replaced among the plurality of groups of liquid crystal screens through the common substrate, and the problem that the display screen is thicker due to the large number of the transparent substrates and the problem that the optical utilization rate is lost due to the original plurality of groups of superimposed layers are solved; simultaneously, the upper electrode layer and the lower electrode layer are electrically connected through the vertical conductive adhesive bridge and the electrode wiring, the electric connection adopts the prior art, the terminal framework is shared by the upper electrode and the lower electrode of the display screen, the special-shaped combination protrusions are matched, the electric connection of the single-side flexible circuit board is realized, and the electric connection adopts the prior art, so that the multicolor liquid crystal display screen has an excellent structure with three narrow side frames.
As an improvement of the invention, the length of the middle layer combining protrusion is sequentially and uniformly increased from top to bottom, the length of the bottom layer combining protrusion is equal to that of the side edge of the bottom layer transparent substrate, and the middle layer combining protrusion and the exposed part of the upper surface of the bottom layer combining protrusion are arranged in a dislocation manner, so that the flexible circuit boards arranged on the upper surfaces of the middle layer combining protrusion and the bottom layer combining protrusion can be arranged on one side edge of the multilayer transparent substrate in a dislocation manner. The structure is adopted to ensure that the device can be electrically connected with the upper electrode layer and the lower electrode layer and is matched with the special-shaped combining protrusions, so that the flexible circuit board arranged on the upper surfaces of the combining protrusions of the middle layer and the bottom layer can be arranged on one side edge of the multilayer transparent substrate in a staggered manner, and the problem that the conventional stacked colorful cholesterol liquid crystal display technology can not realize a narrow frame is solved.
As an improvement of the invention, the lower surfaces of the interlayer bonding protrusions are uniformly provided with bonding support columns for improving bonding smoothness. By adopting the structure, the device improves the bonding smoothness, helps the bonding pressure to be uniformly dispersed, and improves the bonding yield of the device.
As an improvement of the present invention, the frame glue adopts a closed layout. The structure can make the liquid crystal injection mode of the device adopt the center dripping type injection, the liquid crystal is dripped from the center position in the assembling process, and the liquid crystal box space is formed along with the completion of the assembling of the substrates.
As an improvement of the present invention, the frame glue adopts an injection hole type layout. The structure makes the liquid crystal injection mode of the device adopt suction injection.
As an improvement of the invention, the injection hole on the surface of the frame glue adopts a staggered design. By adopting the structure, when the device adopts suction type injection, multi-liquid crystal can be sucked and injected once, the liquid crystal injection process of an individual liquid crystal display screen is not needed, and the complex process is saved.
As an improvement of the present invention, the superimposed layer is a transparent optical adhesive layer or a superimposed air layer.
As an improvement of the present invention, the multilayer transparent substrate may be made of glass material or plastic film material or sheet-like material. Such materials are employed to reduce loss of optical utilization.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the connection of vertical conductive paste and electrode traces according to the present invention;
FIG. 3 is a schematic view of the design of the electrode layer on the lower surface of the transparent substrate according to the present invention;
FIG. 4 is a schematic diagram showing the connection between the upper electrode layer design and the circuit connection member of the transparent substrate of the present invention;
FIG. 5 is a perspective view of a cholesterol liquid crystal display screen of the present invention;
FIG. 6 is a schematic view of the mounting location of the present invention in combination with a support post;
FIG. 7 is a schematic view of a joint support post according to the present invention
FIG. 8 is a schematic diagram of a frame glue seal layout of the present invention;
FIG. 9 is a schematic diagram of a top-level interlayer transparent substrate surface frame glue injection hole layout according to the present invention;
FIG. 10 is a schematic diagram of a layout of a frame glue injection hole on the surface of a transparent substrate of an intermediate layer below in the present invention;
FIG. 11 is a schematic diagram showing the layout of the frame glue injection holes on the surface of the bottom transparent substrate according to the present invention;
fig. 12 is a control schematic of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 4, a stacked multi-color liquid crystal display panel having a common substrate includes: a display part including a multilayer transparent substrate 1, an electrode layer 2, a cholesteric liquid crystal layer 3, a frame adhesive 4, a superimposed layer 5, and a light absorbing layer 6; the circuit connecting part comprises vertical conductive adhesive 7, electrode wires 8, a flexible circuit board 11 and a driving chip 12, and the driving chip 12 is of an existing structure; electrode layers 2 are arranged on the surfaces of the layers of the multilayer transparent substrate 1, which are opposite to each other, and cholesterol liquid crystal layers 3 are arranged between the opposite electrode layers 2; frame glue 4 for preventing liquid crystal leakage is arranged between layers of the multilayer transparent substrate 1, and the frame glue 4 is arranged on the outer side of the cholesterol liquid crystal layer 3, so that the range of a liquid crystal area is limited, and the liquid crystal leakage pollution probability is prevented; the multilayer transparent substrate 1 includes: the upper transparent substrate 101, the plurality of sets of middle transparent substrates 102 and the bottom transparent substrate 103, the multilayer transparent substrate 1 is to provide a production, transportation and processing carrier with light transmission, the common material is glass or plastic film material, the common thickness is about 0.3-1.1mm when glass is used, the common thickness is about 0.1-0.2mm when plastic film material is used, the common material comprises Polyimide (PI, polyimide), polyethylene terephthalate ((PET, polyethylene Terephthalate), polyether-air plastic (PES, polyether-air plastic), polymethyl methacrylate (PMMA), polyethylene diformate plastic (PEN, polyethylene Naphthalate); the bottom surface of the bottom transparent substrate 103 is provided with an overlapped layer 5, the overlapped layer 5 is a transparent optical glue layer or an air layer, the lower surface of the overlapped layer 5 is provided with a light absorbing layer 6 which is a black coating plate of the light absorbing layer, the multicolor liquid crystal display screen reduces the thickness and weight of the display screen by using the common substrate framework, reduces the reflectivity loss caused by the overlapped layer, solves the problem of waste of optical utilization rate and helps to improve the display characteristics, one side or two sides of a lower electrode layer 2a positioned on the lower surfaces of the upper transparent substrate 101 and the plurality of groups of middle transparent substrates 102 extend to the outer side of a frame glue 4, the lower surfaces of the extending ends of the lower electrode layers are electrically connected with vertical conductive glue 7, the electrical connection is made by adopting the prior art, electrode wires 8 are arranged around the electrode layers on the upper surfaces of the plurality of the middle transparent substrates 102 and the bottom transparent substrate 103, the upper electrode layer 2b are electrically connected with the electrode wires 8, the vertical conductive glue 7 are respectively electrically connected with the electrode wires 8 under the upper electrode wires, the lower electrode wires 8, the vertical conductive glue 7 are electrically connected with the prior art, one end of the lower electrode layer 2a positioned on the lower surface of the multilayer transparent substrate 1 and the upper electrode layer 2b positioned on the upper surface of the multilayer transparent substrate 1 are electrically controlled by using the electrode wiring 8 on the upper surface of the multilayer transparent substrate 1 together through the vertical conductive adhesive 7; the vertical conductive adhesive 7 is arranged at the tail end of the electrode wire 8 and is electrically connected with the electrode wire; an intermediate layer combining protrusion 9 is arranged on one side of the plurality of groups of intermediate layer transparent substrates 102; the bottom layer combining protrusion 10 is arranged on one side of the bottom layer transparent substrate 103, the middle layer and the bottom layer combining protrusion are made of the same substrate material, if the substrate is glass, the substrate can be formed together when being cut in appearance, and if the substrate is made of plastic film, the substrate can be formed together when being stamped in appearance, and no extra special material is needed for manufacturing; the upper surfaces of the middle layer combining bulge 9 and the bottom layer combining bulge 10 are respectively provided with a flexible circuit board 11 and a driving chip 12, the two are electrically connected with the electrode wiring 8 through vertical conductive adhesive 7, one end of the flexible circuit board 11 is electrically connected with the vertical conductive adhesive 7 at the tail end of the electrode wiring 8, and the other end of the flexible circuit board is electrically connected with an external host or a control main board, so that display screen control signals are transmitted to the driving chip 12 to control the cholesterol liquid crystal layer 3 to display through the electrode layer 2, the vertical conductive adhesive electrically connects the upper substrate electrode layer and the lower substrate electrode layer, the electrical connection adopts the prior art, the common terminal framework of the upper electrode and the lower electrode of the display screen is realized, the special-shaped substrate combining bulge opening is matched, the electrical connection of the single-side flexible circuit board is realized, and the electrical connection adopts the prior art, so that the display screen has the characteristic of a narrow frame.
The main body of a cholesterol liquid crystal display screen is formed, besides the structure, the structure such as an alignment film, a spacing column and the like is also needed; the alignment film is positioned between the electrode and the liquid crystal, and aims to enable the arrangement direction of the liquid crystal molecules to be more uniform, and enable the liquid crystal molecules to obtain better control, and the thickness is generally about 30-100 nm; the spacer is located between the electrodes for supporting and maintaining the height and uniformity of the liquid crystal space between the substrates, and has a thickness of about 2.5-4 um. Because the thickness ratio of the alignment film is low in the above structure, and meanwhile, the positions of the spacing columns are designed mainly in consideration of uniformity distribution, the cross section of the structure does not necessarily appear, and meanwhile, the cross section of the structure is not the main innovation direction of the invention, so that the description is more concise for illustration, and unless specific feature differences are involved, the description will not be specifically drawn.
As shown in fig. 5, the lengths of the middle layer bonding protrusions 9 are sequentially and uniformly increased from top to bottom, the lengths of the bottom layer bonding protrusions 10 are equal to the lengths of the side edges of the bottom layer transparent substrate 103, and the middle layer bonding protrusions 9 and the exposed portions of the upper surfaces of the bottom layer bonding protrusions 10 are arranged in a staggered manner, so that the flexible circuit boards 11 arranged on the upper surfaces of the middle layer bonding protrusions 9 and the bottom layer bonding protrusions 10 can be arranged on one side edge of the multilayer transparent substrate 1 in a staggered manner, and the problem that the conventional stacked multi-color cholesterol liquid crystal display technology cannot realize a narrow frame is solved.
As shown in fig. 6 and 7, the lower surfaces of the intermediate bonding protrusions 9 are uniformly provided with bonding support posts 13 for improving the bonding flatness, and the bonding yield of the device is improved by using materials and manufacturing methods, which do not require additional material processes, and by adopting such a structure, the bonding flatness of the device is improved, the bonding pressure is uniformly dispersed, and the bonding yield of the device is improved.
As shown in fig. 8, the frame glue 4 may be in a closed layout. The structure can make the liquid crystal injection mode of the device adopt the center dripping type injection, the liquid crystal is dripped from the center position in the assembling process, and the liquid crystal box space is formed along with the completion of the assembling of the substrates.
As shown in fig. 9-11, the frame glue 4 may be in an injection hole layout. The structure makes the liquid crystal injection mode of the device adopt suction injection. And because of the injection holes on the surface of the frame glue 4 among different liquid crystal screens, the dislocation design on the same side is adopted. The structure can realize one-time suction pouring of multiple liquid crystals when the device adopts suction pouring, does not need a liquid crystal pouring process of a separate liquid crystal display screen, and saves complex processes.
In the manufacturing process, the first liquid crystal display screen consists of the upper transparent substrate 101 and the first intermediate transparent substrate from top to bottom in the plurality of intermediate transparent substrates 102, the second liquid crystal display screen consists of the first intermediate transparent substrate from top to bottom in the plurality of intermediate transparent substrates 102 and the second intermediate transparent substrate from top to bottom in the plurality of intermediate transparent substrates 102, the third liquid crystal display screen consists of the second intermediate transparent substrate from top to bottom in the plurality of intermediate transparent substrates 102 and the third intermediate transparent substrate from top to bottom in the plurality of intermediate transparent substrates 102, and so on. . . The upper transparent substrate 101 is shared by the lower substrate of the first liquid crystal display screen and the second liquid crystal display screen, so that the lower electrode required by the second liquid crystal display screen can be turned over when the first liquid crystal display screen is completed; similarly, the lower substrate of the third liquid crystal display screen shares the second intermediate layer transparent substrates from top to bottom in the multiple groups of intermediate layer transparent substrates 102 with the second liquid crystal display screen, so that when the third liquid crystal display screen is completed, the upper electrode required by the second liquid crystal display screen can be turned over for manufacturing, then the first liquid crystal display screen is used as the upper substrate of the second liquid crystal display screen, the third liquid crystal display screen is used as the lower substrate of the second liquid crystal display screen, and the two substrates are assembled, coated with frame glue/silver glue and filled with liquid crystal, so that the second liquid crystal display screen and the stacked liquid crystal display screen are constructed. The stacked LCD structure of the invention, because the electrode terminal signals between different LCDs are all output from the same side, the signal electrical Bonding (Bonding) process between the stacked LCDs and the flexible circuit board can be used for respectively Bonding the required flexible circuit boards when the first LCDs and the third LCDs are manufactured, bonding the flexible circuit boards 11 required by the second LCDs after the second LCDs are formed by stacking the LCDs, and Bonding the respective required flexible circuit boards at the same side once after the last stacking of 3 LCDs, thereby improving the manufacturing efficiency and reducing the complicated process time. The stack LCD structure can support two liquid crystal filling modes, namely suction type or dripping type, wherein the former mode is to coat frame glue on one side of the base plate before a plurality of groups of transparent base plates 1 are assembled, define the range of liquid crystal areas, prevent the liquid crystal from leaking and polluting probability, reserve a liquid crystal filling opening, and fill and seal the allowed liquid crystal by utilizing the vacuum capillary phenomenon after the base plates are assembled, so as to form a liquid crystal box space. The latter is that before the base plate, the base plate on the same side is coated with frame glue to define the liquid crystal area range and prevent the liquid crystal leakage pollution probability, except that the frame glue is of closed design, the liquid crystal is dripped from the central position in the assembling process, and the liquid crystal box space is formed along with the completion of the base plate assembling. In the structure of the invention, because the signals of the electrode terminals are output from the same side, when the suction type liquid crystal injection process is used, as shown in fig. 9-11, the dislocation design of the liquid crystal injection holes can be carried out on the opposite sides, so that the multi-liquid crystal one-time suction injection can be realized after stacking, the liquid crystal injection process of a separate liquid crystal display screen is not needed, and the complex process is saved.
As shown in fig. 12, the control principle of the present invention provides external display signals for an external host or a control motherboard, and transmits the external display signals to the flexible circuit board 11 and the driving chip 12, and controls the cholesterol liquid crystal layer 3 to display through the electrode layer 2.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (6)
1. A stacked multi-color liquid crystal display panel having a common substrate, comprising:
a display component comprising a multilayer transparent substrate (1), an electrode layer (2), a cholesterol liquid crystal layer (3), a frame glue (4), a superposition layer (5) and a light absorption layer (6); and
the circuit connecting part comprises vertical conductive adhesive (7), electrode wires (8), a flexible circuit board (11) and a driving chip (12);
the electrode layers (2) are arranged on the surfaces of the layers of the multilayer transparent substrate (1) opposite to each other,
the electrode layer (2) comprises a lower electrode layer (2 a) positioned on the lower surface of the multilayer transparent substrate (1) and an upper electrode layer (2 b) positioned on the upper surface of the multilayer transparent substrate (1),
a cholesterol liquid crystal layer (3) is arranged between the opposite electrode layers (2);
frame glue (4) for preventing liquid crystal leakage is arranged between layers of the multilayer transparent substrate (1),
the frame adhesives (4) are arranged outside the cholesterol liquid crystal layer (3);
the multilayer transparent substrate (1) comprises: an upper transparent substrate (101), a plurality of groups of middle transparent substrates (102) and a bottom transparent substrate (103),
an overlapping layer (5) is arranged on the bottom surface of the bottom transparent substrate (103),
the lower surface of the superposition layer (5) is provided with a light absorption layer (6);
one side or two sides of the lower electrode layer (2 a) positioned on the lower surfaces of the upper transparent substrate (101) and the plurality of groups of intermediate transparent substrates (102) extend to the outer side of the frame glue (4), and the lower surfaces of the extending ends of the lower electrode layers are electrically connected with vertical conductive glue (7), and the electrical connection adopts the prior art;
electrode wires (8) are arranged around the electrode layers on the upper surfaces of the plurality of groups of intermediate transparent substrates (102) and the bottom transparent substrate (103), and the upper electrode layers (2 b) are electrically connected with the electrode wires (8), wherein the electrical connection adopts the prior art;
the vertical conductive adhesive (7) is also electrically connected with the electrode wire (8) below the vertical conductive adhesive, and the electrical connection adopts the prior art, so that one end of the lower electrode layer (2 a) positioned on the lower surface of the multilayer transparent substrate (1) can be electrically controlled by the vertical conductive adhesive (7) and the upper electrode layer (2 b) positioned on the upper surface of the multilayer transparent substrate (1) together by using the electrode wire (8) on the upper surface of the multilayer transparent substrate (1);
the tail end of the electrode wire (8) is provided with a vertical conductive adhesive (7) above to be electrically connected with the electrode wire;
an intermediate layer combining protrusion (9) is arranged at one side of the plurality of groups of intermediate layer transparent substrates (102);
a bottom layer combining protrusion (10) is arranged at one side of the bottom layer transparent substrate (103);
the upper surfaces of the middle layer bonding bulge (9) and the bottom layer bonding bulge (10) are respectively provided with a flexible circuit board (11) and a driving chip (12), the two are electrically connected with the electrode wire (8) through the vertical conductive adhesive (7),
one end of the flexible circuit board (11) is electrically connected with the vertical conductive adhesive (7) at the tail end of the electrode wire (8), and the other end of the flexible circuit board is electrically connected with an external host or a control main board;
the lengths of the middle layer combining bulges (9) are sequentially and uniformly increased from top to bottom, the lengths of the bottom layer combining bulges (10) are equal to the lengths of the side edges of the bottom layer transparent substrate (103), and the middle layer combining bulges (9) and the exposed parts of the upper surfaces of the bottom layer combining bulges (10) are arranged in a staggered mode, so that the flexible circuit boards (11) arranged on the upper surfaces of the middle layer combining bulges (9) and the bottom layer combining bulges (10) can be arranged on one side edge of the multi-layer transparent substrate (1) in a staggered mode;
the lower surfaces of the interlayer bonding protrusions (9) are uniformly provided with bonding support columns (13) for improving bonding smoothness.
2. The stacked co-substrate multi-color liquid crystal display of claim 1, wherein: the frame glue (4) adopts a closed layout.
3. The stacked co-substrate multi-color liquid crystal display of claim 1, wherein: the frame glue (4) adopts injection hole type layout.
4. A stacked co-substrate multi-color liquid crystal display as claimed in claim 3, wherein: the injection hole on the surface of the frame glue (4) adopts a staggered design.
5. The stacked co-substrate multi-color liquid crystal display of claim 1, wherein: the superimposed layer (5) is a transparent optical adhesive layer or a superimposed air layer.
6. The stacked co-substrate multi-color liquid crystal display of claim 1, wherein: the multilayer transparent substrate (1) is made of glass material, plastic film material or similar sheet material.
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| CN111413816A (en) * | 2020-04-29 | 2020-07-14 | 上海天马微电子有限公司 | Optical modulator and method for manufacturing optical modulator |
| CN115248518A (en) * | 2021-04-26 | 2022-10-28 | 虹彩光电股份有限公司 | Cholesterol liquid crystal display device and manufacturing method thereof |
| CN113514990B (en) * | 2021-06-30 | 2022-10-21 | 惠科股份有限公司 | Display screen and display device |
| CN113960840B (en) * | 2021-10-29 | 2023-10-27 | 京东方科技集团股份有限公司 | Dimming panel |
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