CN219122540U

CN219122540U - Electroluminescence rear cover with edge sealing in conductive layer and electronic equipment

Info

Publication number: CN219122540U
Application number: CN202023338381.4U
Authority: CN
Inventors: 米赛
Original assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Current assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2023-06-02
Anticipated expiration: 2030-12-30

Abstract

The utility model provides a dimming rear cover with an edge sealing in a conductive layer, and electronic equipment, comprising a glass substrate, an electric dimming layer, a decorative layer and a voltage control circuit for adjusting the haze and the transmittance of a polymer dispersed liquid crystal layer, wherein the electric dimming layer comprises a first film substrate, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer and a second film substrate which are arranged in a stacked manner, edges of the first conductive layer and the second conductive layer are removed, an edge annular area formed after the removal is a clearance area of the first film substrate and the second film substrate, and packaging glue is arranged in the clearance area in a sealing manner. 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, two or more than two appearance effects are shown by matching with the decorative layer of the rear cover, and consumers can actively control the appearance of the rear cover.

Description

Electroluminescence rear cover with edge sealing in conductive layer and electronic equipment

Technical Field

The utility model relates to the field of functional devices of consumer electronics, in particular to an electrically-induced dimming rear cover based on a polymer dispersed liquid crystal technology and electronic equipment thereof.

Background

The rear cover of the conventional consumer electronic products such as mobile phones is made of metal, glass, plastic, leather, ceramic and the like, and the conventional products cannot realize active control of appearance effect change no matter which material is. In the prior art, the electrochromic material is used for controlling the rear cover of the mobile phone to realize the color change, but the response speed of the electrochromic material is slower, and the use requirement of a customer is completely not met.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a color-changing rear cover based on a polymer dispersed liquid crystal layer dimming technology, and a consumer can actively control the color-changing rear cover to realize two or more appearance effects, and the specific technical scheme is as follows:

an electrically-induced dimming rear cover with an edge seal within a conductive layer, comprising:

a glass substrate;

the device comprises an electric dimming layer, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer and a second film substrate, wherein the electric dimming layer is overlapped on one side of a glass substrate and comprises a first film substrate, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer and a second film substrate which are overlapped, edges of the first conductive layer and the second conductive layer are removed, an edge annular area formed after the removal is a clearance area of the first film substrate and the second film substrate, and packaging glue is arranged in the clearance area in a sealing mode;

decorative layer stacked on one side of electrically-induced dimming layer

And the voltage control circuit is electrically connected with the first conductive layer and the second conductive layer and is used for adjusting the haze and the transmittance of the polymer dispersed liquid crystal layer.

The utility model also provides electronic equipment which is characterized by comprising the electric dimming rear cover.

According to the technical scheme, the polymer dispersed liquid crystal layer is arranged in the rear cover, so that the haze and the transmittance of the polymer dispersed liquid crystal layer can be actively controlled through voltage, and further two or more appearance effects can be displayed by matching with the decorative layer of the rear cover, and a consumer can actively control the appearance of the rear cover.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another embodiment of the present utility model;

FIG. 3 is a schematic diagram of the working principle of the present utility model;

FIG. 4 is a schematic diagram showing the effects of combining a thin film device and a decorative layer of a PDLC layer of the present utility model, and applying different voltages;

FIG. 5 is a schematic illustration of the preparation process of the present utility model;

FIG. 6 is a schematic view of the clearance area of the present utility model.

Detailed Description

The present utility model will be described in detail below with reference to the drawings and detailed embodiments, and before the technical solutions of the embodiments of the present utility model are described in detail, the terms and terms involved will be explained, and in the present specification, the components with the same names or the same reference numerals represent similar or identical structures, and are only limited for illustrative purposes.

As shown in fig. 1, the present utility model provides an electrically-induced dimming rear cover, which comprises a glass substrate 1, an electrically-induced dimming layer 2 and a decorative layer 3 stacked in order.

The electrically tunable optical 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 decorative layer through a second optical adhesive layer 7, referring to fig. 2.

The first film substrate, the second film substrate and the third film substrate are all transparent polymer substrates, and can be selected from but not limited to PET, COP (cycloolefin polymer), PI polyimide and other transparent film substrates, and the thickness of the substrates ranges from 10 micrometers to 300 micrometers.

The material of the first conductive layer and the second conductive layer can be one of transparent conductive materials such as ITO, FTO, AZO, nano silver paste, metal grid, PEDOT/PSS, metal oxide/metal oxide composite conductive layer and the like, and the sheet resistance range is 10-1000 ohms, preferably 100-800 ohms.

The polymer dispersed liquid crystal layer 23 (PDLC layer) mainly contains polymer gel and liquid crystal, and optionally also spacer particles, and the thickness of the PDLC layer ranges from 5 to 200 micrometers.

The polymer dispersed liquid crystal layer 23 is an opaque state in which liquid crystal is dispersed in an organic solid polymer matrix in small droplets on the order of micrometers, 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 that of the matrix, and light is strongly scattered by the droplets when passing through the matrix, giving a high haze. The application of the electric field adjusts the optical axis orientation of the liquid crystal droplets, which when the refractive indices of the liquid crystal and the polymer matrix are matched, assume a transparent state, and when the electric field is removed, the liquid crystal droplets resume their original high haze state.

Therefore, as shown in fig. 3, the electrically-induced dimming rear cover of the present utility model further includes a voltage control circuit 4 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, the polymer dispersed liquid crystal layer gradually changes from a high haze state to a low haze transparent state in the process of gradually increasing the applied voltage of the voltage control circuit, so as to be used for adjusting the haze and transmittance of the polymer dispersed liquid crystal layer.

The decorative layer 3 may be a film layer with texture, pattern or coloring and combinations thereof, and in this embodiment, the decorative layer is a laminated UV texture layer 31, a non-conductive brightness enhancing coating 32 and an ink layer 33, which form a glare film. Wherein the UV texture layer 31 comprises a UV gel layer having a thickness in the range of 1 to 100 microns, preferably 5 to 20 microns. The UV adhesive layer is provided with embossed textures, and the depth of the textures is smaller than the thickness of the adhesive layer; the non-conductive brightening coating 32 material can be selected from silicon oxide, niobium oxide, indium oxide, titanium oxide, zirconium oxide, aluminum oxide and the like, and can be processed by adopting a physical deposition mode, including magnetron sputtering, electron beam evaporation and the like, and the thickness of the film ranges from 20nm to 800nm; 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 decorative layer are combined, when no voltage is applied, the PDLC layer presents a high haze state, and the superposition effect a of the decorative layer and the haze PDLC layer can be seen; when 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 smaller 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. The voltage is stepped up or down, and a gradual change from A to B, or from B to A, can be exhibited. V1 ranges from 5 to 220V, preferably from 5 to 36V.

Further, the glass substrate is connected with the electrically-induced dimming layer through optical cement 5, the thickness range of the optical cement is 10-120 micrometers, preferably 18-50 micrometers, and an anti-fingerprint film 6 is arranged on one side, far away from the optical cement, of the glass substrate.

Further, since the antenna of the electronic product such as a mobile phone is generally disposed at the edge of the machine body, the conductive layer has an effect on the antenna signal and needs to be removed, in the present utility model, the edges of the first conductive layer 22 and the second conductive layer 24 are removed, the edge annular area formed after the removal is the clearance area 26 of the first film substrate and the second film substrate, the clearance area is sealed and provided with the encapsulation glue 27, the clearance area is free of the conductive layer and cannot be discolored, the clearance area is used as the encapsulation glue frame, and the encapsulation glue at the edge can be disposed in the clearance area without affecting the product use.

The width of the clearance area 26 is 1 to 10mm, preferably 2 to 5mm. The clearance area may be a complete annular area where the edges of the polymer dispersed liquid crystal layer are flush with the edges of the conductive layer. The clear zone may also be two separate and parallel annular regions where the edges of the polymer dispersed liquid crystal layer are not removed and are flush with the edges of the film substrate.

FIG. 5 is a schematic illustration of a preparation process according to a preferred embodiment of the present utility model, specifically as follows:

PET is selected as the first film base material, and magnetron sputtering technology is used for sputtering ITO of 20nm as the first conductive layer. Covering the first conductive layer with a film, exposing the part to be etched, and cleaning with etching solution to obtain the first film substrate with the conductive layer and the clearance area. Taking a piece of packaging adhesive film with the thickness of 20 micrometers, cutting the middle part by using a laser cutting machine or a die cutting machine, leaving the outer ring part to form a packaging adhesive frame, wherein the shape of the adhesive frame is the same as that of the clearance area, as shown in figure 6. And using a laminating machine to laminate the packaging adhesive film with the cut appearance to the clearance area of the first film base material.

PET is selected as the second film base material, and magnetron sputtering technology is used for sputtering ITO with the thickness of 20nm as the second conductive layer. Covering the first conductive layer with a film, exposing the part to be etched, and cleaning with etching solution to obtain the second film substrate with the conductive layer and the clearance area.

And preparing a UV pattern on the surface of the second film substrate without ITO, wherein a layer of UV adhesive is coated on the surface of the second film substrate by adopting a nanoimprint technology, the thickness range is 20 micrometers, a roller with micro-nano textures is used for imprinting textures on the UV adhesive, the texture depth is 5 micrometers, and the UV is immediately solidified after imprinting to form a UV texture layer.

After the solidification is finished, the side of the second film substrate with the UV adhesive layer is coated with a film by using a magnetron sputtering technology to prepare a non-conductive brightness enhancement coating, wherein the materials are silicon oxide, niobium oxide, indium oxide, titanium oxide and zirconium oxide, and the thickness of the film is 150nm.

After the non-conductive brightening coating is prepared, printing ink is screen-printed on the coating, and after drying, a second film substrate with a second conductive layer, a UV texture layer, the non-conductive brightening coating and an ink layer is obtained.

And placing the processed first film substrate and the processed second film substrate on a double-roll extrusion coater. ITO of two films is all placed in the film one side of keeping away from the running roller. The roller A rotates clockwise, and the roller B rotates anticlockwise, so that the roller A and the roller B drive the second film base material and the first film base material to carry out lamination. In the process, a charging head is continuously added with PDLC mixed liquid, the diameter of microbeads in the PDLC mixed liquid is 25 microns, the upper surface and the lower surface of a PDLC layer are combined between a first film substrate and a second film substrate, and the periphery of the PDLC layer is protected by a packaging rubber frame. After curing using a 30 mW/cm LED UV lamp, a film layer combination of the electrically-induced dimming 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 then bonding the first film base material of the film layer combination with a glass cover plate with a corresponding shape by using optical cement to obtain a corresponding electrically-induced dimming rear cover.

The utility model also provides electronic equipment which comprises the electrically-induced dimming rear cover structure and can be a mobile phone, a PC panel, a touch screen and the like.

The above-described embodiments are merely illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.

Claims

1. An electrically-induced dimming rear cover having an edge seal within a conductive layer, comprising:

a glass substrate;

the device comprises an electric dimming layer, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer and a second film substrate, wherein the electric dimming layer is overlapped on one side of a glass substrate and comprises a first film substrate, a first conductive layer, a polymer dispersed liquid crystal layer, a second conductive layer and a second film substrate which are overlapped, edges of the first conductive layer and the second conductive layer are removed, an edge annular area formed after the removal is a clearance area of the first film substrate and the second film substrate, and packaging glue is arranged in the clearance area in a sealing mode; the width of the clearance area is 1-10 mm, the clearance area is a complete annular area or two independent and parallel annular areas, and the edge of the polymer dispersed liquid crystal layer is flush with the edge of the conductive layer;

decorative layer stacked on one side of electrically-induced dimming layer

2. The electrically-powered dimming rear cap of claim 1, wherein the decorative layer comprises a layer of UV texture, a non-conductive brightness enhancing coating and an ink layer in a stacked arrangement.

3. The electrically-dimmed back cover according to claim 1 or 2, wherein the polymer dispersed liquid crystal layer is gradually changed from a high haze state to a low haze transparent state during the voltage applied by the voltage control circuit is gradually increased.

4. The electrically-powered dimming rear cover of claim 1, wherein the glass substrate is connected to the electrically-powered dimming layer through optical glue.

5. The electrically-actuated dimming rear cover of claim 1, wherein a third film substrate is further laminated between the second film substrate and the decorative layer through a second optical adhesive layer.

6. An electronic device comprising an electrically-powered dimming rear cover according to any of claims 1-5.