CN112612159A - Rear cover with electro-dimming function, electronic equipment and preparation method of rear cover - Google Patents
Rear cover with electro-dimming function, electronic equipment and preparation method of rear cover Download PDFInfo
- Publication number
- CN112612159A CN112612159A CN202011622819.3A CN202011622819A CN112612159A CN 112612159 A CN112612159 A CN 112612159A CN 202011622819 A CN202011622819 A CN 202011622819A CN 112612159 A CN112612159 A CN 112612159A
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- layer
- electro
- film substrate
- liquid crystal
- dispersed liquid
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0243—Mechanical details of casings for decorative purposes
Abstract
The invention provides an electro-dimming function rear cover, electronic equipment and a preparation method thereof, wherein the electro-dimming function rear cover comprises: a glass substrate; an electro-dimming layer stacked on one side of the glass substrate, the electro-dimming layer including a first film base material, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer, and a second film base material, which are stacked; a decoration layer stacked on one side of the electro-dimming layer, and a voltage control circuit electrically connected to the first conductive layer and the second conductive layer for adjusting haze and transmittance of the polymer dispersed liquid crystal layer. The polymer dispersed liquid crystal layer is arranged in the rear cover, the haze and the transmittance of the polymer dispersed liquid crystal layer are actively controlled through voltage, the polymer dispersed liquid crystal layer is matched with the decorative layer of the rear cover to present two or more appearance effects, and a consumer can actively control the appearance of the rear cover.
Description
Technical Field
The invention relates to the field of functional devices of consumer electronics, in particular to an electro-dimming functional rear cover based on a polymer dispersed liquid crystal technology, electronic equipment and a preparation method of the electro-dimming functional rear cover.
Background
The back cover materials of the current common consumer electronic products such as mobile phones and the like are metal, glass, plastic, leather, ceramic and the like, and no matter which material is adopted, the active control of the change of the appearance effect can not be realized by the existing products. In the prior art, the rear cover of the mobile phone is controlled to change color by using electrochromism, but the response speed of the used electrochromism material is low, and the use requirement of a customer can not be met completely.
Disclosure of Invention
In order to solve the technical problems, the invention provides a color-changing rear cover based on a polymer dispersed liquid crystal layer dimming technology, a consumer can actively control the color-changing rear cover to realize two or even more than two appearance effects, and the specific technical scheme is as follows:
an electro-dimmer functional back cover comprising:
a glass substrate;
an electro-dimming layer stacked on one side of the glass substrate, the electro-dimming layer including a first film base material, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer, and a second film base material, which are stacked;
a decorative layer laminated on one side of the electro-dimmer layer, and
a voltage control circuit electrically connected to the first conductive layer and the second conductive layer for adjusting haze and transmittance of the polymer dispersed liquid crystal layer.
The invention also provides electronic equipment which is characterized by comprising the rear cover with the electro-dimming function.
The invention also provides a preparation method of the rear cover with the electro-dimming function, which comprises the following steps:
providing a first film substrate and a second film substrate;
forming a first conductive layer on one side of the first film substrate, and forming a second conductive layer on one side of the second film substrate;
forming a decorative layer on one side of the second film substrate far away from the second conductive layer;
extruding and laminating the first film substrate and the second film substrate, wherein one side of the first film substrate, which is provided with the first conducting layer, and one side of the second film substrate, which is provided with the second conducting layer, are laminated sides;
adding polymer dispersed liquid crystal mixed liquid when the laminated sheet is extruded, and curing between the first conducting layer and the second conducting layer to form a polymer dispersed liquid crystal layer;
and superposing the first film base material and the glass substrate to obtain the rear cover with the electro-dimming function.
According to the technical scheme, the polymer dispersed liquid crystal layer is arranged in the rear cover, the haze and the transmittance of the polymer dispersed liquid crystal layer can be actively controlled through voltage, and then the polymer dispersed liquid crystal layer is matched with the decorative layer of the rear cover to present two or more appearance effects, so that a consumer can actively control the appearance of the rear cover.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention;
FIG. 3 is a schematic diagram of the working principle of the present invention;
FIG. 4 is a schematic diagram showing the effect of applying different voltages to a thin film device of a PDLC layer in combination with a decorative layer according to the present invention;
FIG. 5 is a schematic diagram of the preparation process of the present invention.
Detailed Description
The present invention will be described in detail with reference to the drawings and specific embodiments, wherein prior to describing embodiments of the present invention in detail, the terms and terminology used herein are used to explain the same or similar structures and components with the same names or same reference numbers for illustrative purposes only.
As shown in fig. 1, the present invention provides an electro-dimming function rear cover including a glass substrate 1, an electro-dimming layer 2, and a decoration layer 3, which are sequentially stacked.
The electro-dimming layer 2 includes a first film substrate 21, a first conductive layer 22, a polymer dispersed liquid crystal layer 23, a second conductive layer 24, and a second film substrate 25, which are stacked.
A third film substrate 8 is further stacked between the second film substrate and the decoration layer through a second optical adhesive layer 7, see fig. 2.
The first film base material, the second film base material and the third film base material are all transparent polymer base materials, and can be selected from but not limited to transparent film base materials such as PET, COP (cycloolefin polymer), PI polyimide and the like, and the thickness range of the base materials is 10-300 micrometers.
The first conducting layer and the second conducting layer can be made of one of transparent conducting materials such as ITO, FTO, AZO, nano silver paste, metal grids, PEDOT/PSS, metal oxide/metal oxide composite conducting layers and the like, and the square resistance range of the first conducting layer and the second conducting layer is 10-1000 ohms, preferably 100-800 ohms.
The polymer dispersed liquid crystal layer 23(PDLC layer) mainly contains polymer glue and liquid crystal, and optionally further comprises spacer particles, and the thickness of the PDLC layer is in the range of 5-200 micrometers.
The polymer dispersed liquid crystal layer 23 is an opaque state in which liquid crystals are dispersed in an organic solid polymer matrix in the form of small droplets of micron order, and since the optical axes of the small droplets composed of liquid crystal molecules are in a free orientation, the refractive index thereof does not match the refractive index of the matrix, and light is strongly scattered by the droplets while passing through the matrix, thus exhibiting high haze. The application of an electric field can adjust the optical axis orientation of the liquid crystal droplets, which assume a transparent state when the refractive indices of the liquid crystal and the polymer matrix are matched, and which revert to the original high haze state when the electric field is removed.
Therefore, as shown in fig. 3, the back cover with electro-dimming function of the present invention further includes a voltage control circuit 4, the voltage control circuit is electrically connected to the first conductive layer 22 and the second conductive layer 24, that is, by using the characteristics of the polymer dispersed liquid crystal layer, during the process that the voltage applied by the voltage control circuit is gradually increased, the polymer dispersed liquid crystal layer is gradually changed from the high haze state to the low haze transparent state, and the voltage control circuit can be used for adjusting the haze and the transmittance of the polymer dispersed liquid crystal layer.
The decorative layer 3 may be a film layer with texture, pattern or coloring and a combination thereof, and in this embodiment, the decorative layer is a UV texture layer 31, a non-conductive brightening plating layer 32 and an ink layer 33 which are stacked to form a glare film. The UV texture layer 31 comprises a UV glue layer with a thickness of 1-100 micrometers, and preferably, the thickness is 5-20 micrometers. Embossed textures are arranged on the UV adhesive layer, and the depth of the textures is smaller than the thickness of the adhesive layer; the non-conductive brightening coating 32 can be made of silicon oxide, niobium oxide, indium oxide, titanium oxide, zirconium oxide, aluminum oxide and the like, can be processed in a physical deposition mode including magnetron sputtering, electron beam evaporation and the like, and has a film thickness ranging from 20nm to 800 nm; the ink layer 33 may be formed by screen printing, ink jet printing, or the like.
As shown in fig. 4, the thin film device with the PDLC layer and the decoration layer are designed in combination, when no voltage is applied, the PDLC layer is in a high haze state, and the superposition effect a of the decoration layer and the haze PDLC layer can be seen; when the alternating voltage V1 is applied, the PDLC presents a transparent state with low haze, and the real effect B of the decorative layer can be seen; the control voltage is less than V1, the PDLC haze can be kept at a certain intermediate value, and the whole rear cover has the effect of being intermediate between A and B. Gradually increasing the voltage or decreasing the voltage can also present a gradual change effect from a to B, or from B to a. The V1 is in the range of 5-220V, preferably 5-36V.
Further, the glass substrate is connected with the electro-dimming layer through an optical adhesive 5, the thickness range of the optical adhesive is 10-120 micrometers, preferably 18-50 micrometers, and a fingerprint preventing film 6 is arranged on one side, away from the optical adhesive, of the glass substrate.
FIG. 5 is a schematic diagram of a preferred embodiment of the process of the present invention, as follows:
the first film substrate and the second film substrate are made of PET, ITO with the thickness of 20nm is sputtered by using a magnetron sputtering technology to serve as a first conducting layer, and ITO with the thickness of 20nm is sputtered to serve as a second conducting layer.
Preparing a UV pattern on the surface of the second film substrate without ITO, coating a layer of UV glue with the thickness range of 20 microns on the surface of the second film substrate by adopting a nano-imprinting technology, imprinting the texture on the UV glue by using a roller with micro-nano texture with the depth of 5 microns, and immediately performing UV curing after imprinting to form a UV texture layer.
After the curing is finished, a non-conductive brightening coating is prepared on one side of the second film substrate, which is provided with the UV glue layer, by coating through a magnetron sputtering technology, wherein the materials are selected from silicon oxide, niobium oxide, indium oxide, titanium oxide and zirconium oxide, and the thickness of the coating is 150 nm.
And after the non-conductive brightening coating is prepared, printing ink is printed on the non-conductive brightening coating through a screen printing mode, and the second film base material attached with a second conductive layer, a UV texture layer, the non-conductive brightening coating and the ink layer is obtained after drying.
And placing the processed first film base material and the second film base material on a double-roller extrusion coating machine. The ITO of two films is all placed at the one side that the running roller was kept away from to the film. The roller A rotates clockwise, the roller B rotates anticlockwise, and the roller A and the roller B drive the second film base material and the first film base material to be laminated. In the process, the material adding head continuously adds PDLC mixed liquid, the diameter of the micro-bead in the PDLC mixed liquid is 25 micrometers, and the PDLC is added between the first film base material and the second film base material. After curing using a 30 mW/square centimeter LED uv lamp, a film layer combination of the electroluminescent layer and the decorative layer was obtained.
And cutting the film layer combination by using a laser cutting machine or a die cutting machine to obtain a required shape, wherein the shape can be a mobile phone or a PC flat plate, and bonding the first film substrate of the film layer combination with a glass cover plate with a corresponding shape by using optical cement to obtain a corresponding rear cover with an electro-dimming function.
The invention also provides electronic equipment which comprises the rear cover structure with the electro-dimming function, wherein the electronic equipment can be a mobile phone, a PC (personal computer) tablet, a touch screen and the like.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. An electro-dimmer functional bezel, comprising:
a glass substrate;
an electro-dimming layer stacked on one side of the glass substrate, the electro-dimming layer including a first film base material, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer, and a second film base material, which are stacked;
a decorative layer laminated on one side of the electro-dimmer layer, and
a voltage control circuit electrically connected to the first conductive layer and the second conductive layer for adjusting haze and transmittance of the polymer dispersed liquid crystal layer.
2. The electro-dimmer functional back cover as defined in claim 1, wherein the decorative layer comprises a UV textured layer, a non-conductive brightness enhancing coating layer, and an ink layer in a laminated arrangement.
3. The electro-dimming functional back cover according to claim 1 or 2, wherein the polymer-dispersed liquid crystal layer gradually changes from a high haze state to a low haze transparent state during the gradual increase of the voltage applied by the voltage control circuit.
4. The electro-dimmer functional back cover according to claim 1, wherein the glass substrate and the electro-dimmer layer are connected by an optical adhesive.
5. The back cover with an electro-dimming function of claim 1, wherein a third film substrate is further laminated between the second film substrate and the decoration layer through a second optical adhesive layer.
6. An electronic device comprising an electro-dimmer functional back cover as claimed in any one of claims 1-5.
7. A method for preparing a back cover with an electro-dimming function according to any one of claims 1-5, comprising the steps of:
providing a first film substrate and a second film substrate;
forming a first conductive layer on one side of the first film substrate, and forming a second conductive layer on one side of the second film substrate;
forming a decorative layer on one side of the second film substrate far away from the second conductive layer;
extruding and laminating the first film substrate and the second film substrate, wherein one side of the first film substrate, which is provided with the first conducting layer, and one side of the second film substrate, which is provided with the second conducting layer, are laminated sides;
adding polymer dispersed liquid crystal mixed liquid when the laminated sheet is extruded, and curing between the first conducting layer and the second conducting layer to form a polymer dispersed liquid crystal layer;
and superposing the first film base material and the glass substrate to obtain the rear cover with the electro-dimming function.
8. The preparation method of claim 7, wherein the decorative layer is a UV texture layer, a non-conductive brightening coating layer and an ink layer which are sequentially prepared and formed on one side of the second film substrate from inside to outside.
9. The preparation method according to claim 7, wherein the first film substrate and the second film substrate are subjected to extrusion lamination, and specifically:
and respectively placing one side of a first film substrate with a first conductive layer and one side of a second film substrate with a second conductive layer on a double-roller extrusion coating machine, wherein the double-roller extrusion coating machine rotates oppositely and drives the first film substrate and the second film substrate to extrude and laminate.
10. The production method according to claim 7, wherein the diameter of the microbeads in the polymer-dispersed liquid crystal mixture liquid is 25 μm, and 30mW/cm is used2Curing the LED ultraviolet lamp to form a polymer dispersed liquid crystal layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622819.3A CN112612159A (en) | 2020-12-30 | 2020-12-30 | Rear cover with electro-dimming function, electronic equipment and preparation method of rear cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011622819.3A CN112612159A (en) | 2020-12-30 | 2020-12-30 | Rear cover with electro-dimming function, electronic equipment and preparation method of rear cover |
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| Publication Number | Publication Date |
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| CN112612159A true CN112612159A (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011622819.3A Pending CN112612159A (en) | 2020-12-30 | 2020-12-30 | Rear cover with electro-dimming function, electronic equipment and preparation method of rear cover |
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| CN113534527A (en) * | 2021-07-28 | 2021-10-22 | 东莞市晶博光电股份有限公司 | Variable double-color module adjusted through liquid crystal microspheres and preparation process thereof |
| CN113534558A (en) * | 2021-07-12 | 2021-10-22 | Oppo广东移动通信有限公司 | Shell and electronic equipment thereof |
| CN113794027A (en) * | 2021-08-12 | 2021-12-14 | 荣耀终端有限公司 | Battery cover and electronic equipment |
| CN113805402A (en) * | 2021-08-12 | 2021-12-17 | 荣耀终端有限公司 | Camera shooting assembly and electronic equipment |
| CN114012953A (en) * | 2021-11-02 | 2022-02-08 | 东莞正广精密科技有限公司 | Processing technology for manufacturing mobile phone rear shell by using liquid crystal |
| CN114083867A (en) * | 2021-11-22 | 2022-02-25 | Oppo广东移动通信有限公司 | Electronic equipment, shell and appearance membrane thereof |
| CN114994963A (en) * | 2021-10-21 | 2022-09-02 | 荣耀终端有限公司 | Rear cover, electronic equipment and preparation method of rear cover |
| WO2022247052A1 (en) * | 2021-05-28 | 2022-12-01 | 安徽精卓光显技术有限责任公司 | Power-on color-changing electronic device protective housing |
| CN115480419A (en) * | 2022-08-23 | 2022-12-16 | 杭州兵智科技有限公司 | Ionic liquid doped polymer dispersed liquid crystal color-changing device and preparation method thereof |
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2020
- 2020-12-30 CN CN202011622819.3A patent/CN112612159A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022247052A1 (en) * | 2021-05-28 | 2022-12-01 | 安徽精卓光显技术有限责任公司 | Power-on color-changing electronic device protective housing |
| CN113534558A (en) * | 2021-07-12 | 2021-10-22 | Oppo广东移动通信有限公司 | Shell and electronic equipment thereof |
| WO2023284462A1 (en) * | 2021-07-12 | 2023-01-19 | Oppo广东移动通信有限公司 | Housing and electronic device thereof |
| CN113534527A (en) * | 2021-07-28 | 2021-10-22 | 东莞市晶博光电股份有限公司 | Variable double-color module adjusted through liquid crystal microspheres and preparation process thereof |
| CN113805402A (en) * | 2021-08-12 | 2021-12-17 | 荣耀终端有限公司 | Camera shooting assembly and electronic equipment |
| CN113794027A (en) * | 2021-08-12 | 2021-12-14 | 荣耀终端有限公司 | Battery cover and electronic equipment |
| WO2023015975A1 (en) * | 2021-08-12 | 2023-02-16 | 荣耀终端有限公司 | Battery cover and electronic device |
| CN114994963A (en) * | 2021-10-21 | 2022-09-02 | 荣耀终端有限公司 | Rear cover, electronic equipment and preparation method of rear cover |
| WO2023065876A1 (en) * | 2021-10-21 | 2023-04-27 | 荣耀终端有限公司 | Rear cover, electronic device, and preparation method for rear cover |
| CN114012953A (en) * | 2021-11-02 | 2022-02-08 | 东莞正广精密科技有限公司 | Processing technology for manufacturing mobile phone rear shell by using liquid crystal |
| CN114012953B (en) * | 2021-11-02 | 2024-01-09 | 东莞正广精密科技有限公司 | Processing technology for manufacturing mobile phone rear shell by liquid crystal |
| CN114083867A (en) * | 2021-11-22 | 2022-02-25 | Oppo广东移动通信有限公司 | Electronic equipment, shell and appearance membrane thereof |
| CN115480419A (en) * | 2022-08-23 | 2022-12-16 | 杭州兵智科技有限公司 | Ionic liquid doped polymer dispersed liquid crystal color-changing device and preparation method thereof |
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