CN108600450B

CN108600450B - Panel structure

Info

Publication number: CN108600450B
Application number: CN201810372945.4A
Authority: CN
Inventors: 林万衡; 刘忠武; 郭毓弼; 林信诚; 张俊德
Original assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Current assignee: Interface Optoelectronics Shenzhen Co Ltd; Interface Technology Chengdu Co Ltd; General Interface Solution Ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2020-12-01
Anticipated expiration: 2038-04-24
Also published as: TWI659345B; TW201945905A; CN108600450A

Abstract

A panel structure comprises a glass cover plate, a decorative film, an adhesion layer, an ink layer, a filling layer and a fingerprint identification element. The decoration film is configured on the glass cover plate, wherein the decoration film is provided with an opening. The adhesive layer is arranged between the glass cover plate and the decorative film. The ink layer is arranged in the opening and is contacted with the glass cover plate. The filling layer is configured in the opening and on the ink layer, wherein the upper surface of the filling layer is higher than the upper surface of the decorative film or is coplanar with the upper surface of the decorative film. The fingerprint identification element is configured on the filling layer. The panel structure provided by the disclosure can reduce the opening size of the decorative film, reduce the appearance influence caused by the color difference between the decorative film and the ink layer, and improve the identification capability of the fingerprint identification element.

Description

Panel structure

Technical Field

The present invention relates to a panel structure having a fingerprint recognition device.

Background

In recent years, fingerprint identification technology is widely applied to various electronic products, and users perform personal identification and authentication of the electronic products by fingerprint identification. However, in the design of the curved cover plate product, since the curved cover plate cannot be printed with ink in a general manner, the decorative film must be first printed with ink and then attached to the curved glass cover plate.

Because the decoration film and the curved glass cover plate are generally adhered by silica gel optical cement, the silica gel optical cement can affect the operation of the ultrasonic fingerprint identification element and the fingerprint identification capability thereof.

Disclosure of Invention

In one aspect of the present disclosure, a panel structure is provided, which includes a glass cover plate, a decoration film, an adhesive layer, an ink layer, a filling layer, and a fingerprint recognition device. The decoration film is configured on the glass cover plate, wherein the decoration film is provided with an opening. The adhesive layer is arranged between the glass cover plate and the decorative film. The ink layer is arranged in the opening and is contacted with the glass cover plate. The filling layer is configured in the opening and on the ink layer, wherein the upper surface of the filling layer is higher than the upper surface of the decorative film or is coplanar with the upper surface of the decorative film. The fingerprint identification element is configured on the filling layer.

The panel structure provided by the disclosure can reduce the opening size of the decorative film, reduce the appearance influence caused by the color difference between the decorative film and the ink layer, and improve the identification capability of the fingerprint identification element. Therefore, the panel structure provided by the present disclosure is applicable to both curved cover plates and flat cover plates.

Drawings

The foregoing and other objects, features, advantages and embodiments of the disclosure will be more readily understood from the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a mobile phone having a panel structure according to an embodiment of the disclosure;

FIG. 2 is a cross-sectional view of a panel structure according to embodiment 1 of the disclosure; and

fig. 3 illustrates a cross-sectional view of a panel structure according to embodiment 2 of the present disclosure.

Reference numerals:

200. 300, and (2) 300: panel structure

110. 210, 310: glass cover plate

120: fingerprint identification area

230. 330: decorative film

280. 380: fingerprint identification element

240. 340, and (3): opening of the container

250. 350: printing ink layer

220. 320, and (3) respectively: adhesive layer

235. 265, 335, 365: upper surface of

260. 360: filling layer

261: second epoxy resin layer

262: polyester

270. 370: a first epoxy resin layer

130. 290: concave part

AA': thread

Detailed Description

Spatially relative terms, such as "below", "below" … "," below "," above "…", "above", etc., are used for ease of describing the relationship of elements or features to other elements or features depicted in the drawings. Spatially relative terms may encompass different orientations of the elements in use or operation in addition to the orientation depicted in the figures. The instrument may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted as such.

Fig. 1 is a schematic diagram illustrating a mobile phone having a panel structure according to an embodiment of the disclosure. In fig. 1, the glass cover plate 110 is a curved cover plate, and the curvature radius of the curved cover plate is smaller at two sides, i.e. the curved surface is more obvious at two sides. The glass cover 110 includes a fingerprint identification area 120, the fingerprint identification area 120 is used for fingerprint identification, and a user can place a finger in the recess 130 of the fingerprint identification area 120 to perform a fingerprint identification function. In addition, in other embodiments, the glass cover plate has a smaller radius of curvature around its circumference. FIGS. 2 and 3 are cross-sectional views of the fingerprint identification area 120 along line AA'.

Fig. 2 illustrates a cross-sectional view of a panel structure 200 according to embodiment 1 of the present disclosure. The panel structure 200 includes a glass cover 210, an adhesive layer 220, a decoration film 230, an ink layer 250, a filling layer 260, a first epoxy layer 270, and a fingerprint identification device 280, wherein the glass cover 210 is a curved cover (fig. 2 only shows a partial panel structure 200, and thus the glass cover 210 is not shown to have a distinct curved surface). The decoration film 230 is disposed on the glass cover plate 210, wherein the adhesive layer 220 is disposed between the decoration film 230 and the glass cover plate 210. The decoration film 230 has an opening 240, and the opening 240 exposes a portion of the glass cover plate 210. The ink layer 250 is disposed in the opening 240 and contacts the glass cover 210. The filling layer 260 is disposed on the ink layer 250, the fingerprint identification device 280 is disposed on the filling layer 260, and the first epoxy layer 270 is disposed between the filling layer 260 and the fingerprint identification device 280. The first epoxy layer 270 is in contact with the filling layer 260 and the fingerprint identification device 280, and the fingerprint identification device 280 is attached to the filling layer 260 through the first epoxy layer 270. In some embodiments, the thickness of the adhesive layer 220 is greater than the thickness of the ink layer 250.

In one embodiment, the upper surface 265 of the filling layer 260 is coplanar with the upper surface 235 of the decoration film 230. In one embodiment, the upper surface 265 of the filling layer 260 is higher than the upper surface 235 of the decoration film 230. Since the decoration film 230 has the opening 240, there is no pattern or color of the decoration film 230 at the opening 240, the ink layer 250 is used to fill up the gap of the opening 240, and can hide the fingerprint identification element 280 from the user. In one embodiment, the ink layer 250 may be similar in color or pattern to the decorative film 230. In another embodiment, the fingerprint recognition element 280 is higher than the upper surface 235 of the decoration film 230.

In one embodiment, the filling layer 260 includes a second epoxy layer 261 and polyester 262. The second epoxy layer 261 is located between the polyester 262 and the ink layer 250 and contacts the polyester 262 and the ink layer 250. In one embodiment, the polyester 262 comprises polyethylene terephthalate. In one embodiment, the thickness of the first epoxy layer 270 and the second epoxy layer 261 is 1 μm to 100 μm, such as 5 μm, 10 μm, 20 μm, 50 μm, 80 μm, or 95 μm. The thicknesses of the first epoxy layer 270 and the second epoxy layer 261 may be the same or different. In one embodiment, the polyester 262 has a thickness of 50 μm to 200 μm, such as 70 μm, 100 μm, 150 μm, or 180 μm. In one embodiment, the polyester 262 includes alignment marks, which can provide alignment reference during the bonding process. In one embodiment, the fingerprint recognition device 280 may also include alignment marks to improve the accuracy of the attachment. Since the filling layer 260 of embodiment 1 uses a material that does not interfere with the fingerprint recognition performance, the resolution of fingerprint recognition can be improved.

In one embodiment, the polyester 262 does not contact the decoration film 230, and the second epoxy layer 261 contacts the decoration film 230. In other words, the lateral width of the polyester 262 is smaller than that of the opening 240, so that the polyester 262 can be smoothly inserted into the opening 240. In another embodiment, the first epoxy layer 270 has a smaller lateral width than the second epoxy layer 261.

In one embodiment, the glass cover 210 includes a recess 290, and the recess 290 corresponds to the position of the fingerprint recognition element 280. Further, the recess 290 corresponds to the recess 130 of fig. 1. The sensing signal of the fingerprint recognition device 280 is emitted toward the recess 290. When the fingertip of the user touches the recess 290, the fingerprint identification device 280 sends out a sensing signal, and the sensing signal is reflected by the fingertip, so that the fingerprint identification device 280 can determine the fingerprint.

In one embodiment, when the top surface 265 of the filling layer 260 is not lower than the top surface 235 of the decoration film 230, the yield of the attaching process of the fingerprint identification device 280 can be improved. Since the fingerprint sensor 280 is attached to the filling layer 260, not to the opening 240, the attachment process will not cause the attachment problem because the size of the opening 240 is smaller than that of the fingerprint sensor 280.

By the above design, the panel structure 200 can reduce the size of the opening 240, thereby reducing the color difference between the ink layer 250 and the decoration film 230.

The fingerprint identification device 280 includes a sensor and a flexible printed circuit board, and since the fingerprint identification device 280 is not disposed in the opening 240, the size of the opening 240 does not need to consider the size of the flexible printed circuit board, and the size of the opening 240 of the panel structure 200 only needs to be close to the size of the sensor, so that the fingerprint identification device 280 can perform a normal sensing function, thereby effectively reducing the size of the opening 240.

Fig. 3 illustrates a cross-sectional view of a panel structure 300 according to embodiment 2 of the present disclosure. The panel structure 300 includes a glass cover plate 310, an adhesive layer 320, a decoration film 330, an ink layer 350, a filling layer 360, a first epoxy layer 370 and a fingerprint identification device 380, wherein the glass cover plate 310 is a curved cover plate (fig. 3 only shows a partial panel structure 300, and thus the illustrated glass cover plate 310 does not present a distinct curved surface). The decoration film 330 is disposed on the glass cover plate 310, wherein the adhesive layer 320 is disposed between the decoration film 330 and the glass cover plate 310 and is in contact with the decoration film 330 and the glass cover plate 310. Similar to fig. 2, the decoration film 330 has an opening 340, and the opening 340 exposes a portion of the glass cover plate 310. The ink layer 350 is disposed in the opening 340 and contacts the glass cover plate 310. In some embodiments, the adhesive layer 320 has a greater thickness than the ink layer 350. The filling layer 360 is disposed on the ink layer 350, and the fingerprint identification element 380 is disposed on the filling layer 360, wherein the first epoxy layer 370 is disposed between the filling layer 360 and the fingerprint identification element 380. It is noted that, unlike fig. 2, in the embodiment shown in fig. 3, the filling layer 360 comprises epoxy resin or melamine-formaldehyde resin. In some embodiments, the filling layer 360 fills and fills the opening 340, in other words, the filling layer 360 contacts the decoration film 330. In some embodiments, the upper surface 365 of the filler layer 360 is coplanar with the upper surface 335 of the decorative film 330 or higher than the upper surface 335 of the decorative film 330. In another embodiment, the fingerprint recognizing element 380 is higher than the upper surface 335 of the decorative film 330. In addition, since the filling layer 360 of embodiment 2 uses a material that does not interfere with the fingerprint recognition performance, the resolution of fingerprint recognition can be improved.

Similar to fig. 2, the upper surface 365 of the filling layer 360 is not lower than the upper surface 335 of the decoration film 330, so that the yield of the attaching process of the fingerprint identification device 380 and the filling layer 360 can be improved. Since the size of the fingerprint sensor 380 may be larger than the size of the opening 340, if the upper surface 365 of the filling layer 360 is lower than the upper surface 335 of the decoration film 330, the assembly is difficult, so that the fingerprint sensor 380 cannot be disposed in the opening 340, or the fingerprint sensor 380 cannot be tightly attached to the filling layer 360, so that a gap is formed between the two, thereby affecting the fingerprint sensing capability. Furthermore, since the detection signal from the fingerprint sensor 380 does not pass through the adhesive layer 320, the intensity of the reflected signal can be greatly increased to improve the detection resolution.

In certain embodiments, the thickness of the first epoxy layer 370 is 1 μm to 100 μm, such as 5 μm, 10 μm, 20 μm, 50 μm, 80 μm, 90 μm, or 95 μm. In certain embodiments, the thickness of the fill layer 360 is 50 μm to 200 μm, such as 70 μm, 100 μm, 150 μm, or 180 μm. In some embodiments, the decoration film 330 includes alignment marks to improve alignment accuracy during the bonding process. In other embodiments, the fingerprint recognition device 380 may also include alignment marks to improve the accuracy of the bonding process.

While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A panel structure, comprising:

a glass cover plate;

the decoration film is provided with an opening and is configured on the glass cover plate;

the adhesive layer is arranged between the glass cover plate and the decorative film;

the ink layer is arranged in the opening and is in contact with the glass cover plate;

a filling layer disposed in the opening and on the ink layer, wherein an upper surface of the filling layer is higher than an upper surface of the decoration film or coplanar with the upper surface of the decoration film;

wherein the filling layer comprises polyester and a second epoxy resin layer, or the filling layer comprises epoxy resin or melamine-formaldehyde resin; and

and the fingerprint identification element is arranged on the filling layer.

2. The panel structure of claim 1, further comprising a first epoxy layer disposed between the fingerprint recognition element and the filler layer.

3. The panel structure of claim 2, wherein when the filler layer comprises the polyester and the second epoxy layer, the second epoxy layer is disposed between the polyester and the ink layer.

4. The panel structure of claim 3, wherein the fingerprint recognition element is higher than the upper surface of the decorative film.

5. The panel structure of claim 3, wherein said opening exposes a portion of said glass cover plate.

6. The panel structure of claim 3, wherein said polyester includes a registration mark.

7. The panel structure of claim 2, wherein when said filling layer comprises said epoxy resin or said melamine-formaldehyde resin, said filling layer is in contact with said ink layer.

8. The panel structure of claim 7, wherein the filler layer contacts the decorative film.

9. The panel structure of claim 7, wherein the filling layer fills the opening.

10. The panel structure of claim 7, wherein said decorative film includes an alignment mark.