CN111368583A

CN111368583A - Electronic device and fingerprint identification and light equalizing structure thereof

Info

Publication number: CN111368583A
Application number: CN201811590016.7A
Authority: CN
Inventors: 张正中; 廖智良
Original assignee: Chicony Electronics Co Ltd
Current assignee: Chicony Electronics Co Ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2020-07-03

Abstract

A fingerprint identification and light equalization structure is applied to an electronic device, and the electronic device comprises a display panel. The fingerprint identification and light equalizing structure comprises a backlight plate, a plurality of light emitting elements, a semi-penetrating reflective filter and a fingerprint camera module. The backlight plate is arranged below the display panel and comprises a through hole. The plurality of light emitting elements are arranged on one side of the backlight plate facing the display panel. The semi-penetration reflection type optical filter is arranged in the through hole. The fingerprint camera module is located below the transflective filter.

Description

Electronic device and fingerprint identification and light equalizing structure thereof

Technical Field

The present disclosure relates to a fingerprint identification and light equalizing structure, and more particularly, to a fingerprint identification and light equalizing structure that can be installed below a display panel without affecting a picture of the display panel.

Background

Some smart phones with full-fluorescent screen type in the market have fingerprint identification function, in the structure of the mobile phones, the liquid crystal screen is designed to directly cover the fingerprint identifier, and the light emitting diode and the fingerprint identifier are located at the same height; therefore, when a user presses the liquid crystal screen by a finger, the fingerprint identifier under the liquid crystal display screen can identify the fingerprint of the user, and the light emitting diode can also emit light to display the picture on the liquid crystal screen.

However, when the fingerprint sensor is installed under the liquid crystal screen, the fingerprint sensor will block the light of the light emitting diode under the liquid crystal screen; therefore, the fingerprint identifier can generate dark blocks on the picture played by the surrounding liquid crystal screen, which seriously affects the visual impression of the user.

Therefore, there is a need for a new fingerprint identification and light equalization structure that can be installed under a liquid crystal screen without affecting the screen of the liquid crystal screen.

Disclosure of Invention

The present disclosure is directed to a fingerprint recognition and light equalizing structure that can be installed below a display panel without affecting a picture of the display panel.

To achieve the above object, the present application provides a fingerprint identification and light equalization structure for an electronic device, which includes a display panel. The fingerprint identification and light equalizing structure comprises a backlight plate, a plurality of light emitting elements, a semi-penetrating reflective filter and a fingerprint camera module. The backlight plate is arranged below the display panel and comprises a through hole. The plurality of light emitting elements are arranged on one side of the backlight plate facing the display panel. The semi-penetration reflection type optical filter is arranged in the through hole. The fingerprint camera module is located below the transflective filter.

According to an embodiment of the present application, the transflective filter further includes a substrate and a coating layer disposed on a side of the substrate facing the backlight panel.

According to an embodiment of the application, the surface of the coating is saw-toothed or trapezoidal.

According to an embodiment of the present application, the plurality of light emitting elements are symmetrically disposed on the backlight plate.

According to an embodiment of the present application, a portion of the light emitting elements are symmetrically disposed on the backlight plate, and another portion of the light emitting elements surround the through hole and are symmetrical to each other.

According to an embodiment of the present application, the material of the transflective filter is glass, polycarbonate or polymethyl methacrylate.

Another objective of the present application is to provide an electronic device having a fingerprint recognition and light-equalizing structure that can be installed under a display panel without affecting the picture of the display panel.

To achieve the above objective, an electronic device of the present application includes a display panel and a fingerprint identification and light equalizing structure. The fingerprint identification and light equalizing structure comprises a backlight plate, a plurality of light emitting elements, a semi-penetrating reflective filter and a fingerprint camera module. The backlight plate is arranged below the display panel and comprises a through hole. The plurality of light emitting elements are arranged on one side of the backlight plate facing the display panel. The semi-penetration reflection type optical filter is arranged in the through hole. The fingerprint camera module is located below the transflective filter.

Drawings

Fig. 1 is a schematic diagram of an electronic device according to a first embodiment of the present application.

Fig. 2 is a schematic diagram of a fingerprint recognition and light equalizing structure mounted under a display panel according to a first embodiment of the present application.

Fig. 3 is a cross-sectional view of an electronic device according to a first embodiment of the present application.

Fig. 4 is a schematic diagram of a transflective filter according to a first embodiment of the present application.

Fig. 5 is a schematic diagram of a transflective filter according to another embodiment of the present application.

Fig. 6 is a schematic view of a backlight plate and a light emitting member according to a second embodiment of the present application.

Description of reference numerals:

fingerprint identification and light equalizing structure 1, 1a

Backlight board 10

Through-hole 11

Luminescent element

20, 20a

Transflective

optical filters

30, 30a

Bottom plate 31

Plating layers

32, 32a

Fingerprint camera module 40

Electronic device 900

Display panel 910

Electronic device case 920

Detailed Description

In order to make the technical content of the present application more comprehensible, the present application shall be described with reference to preferred embodiments.

Please refer to fig. 1 to 5 together to illustrate an electronic device and a fingerprint recognition and light equalizing structure according to a first embodiment of the present application. Fig. 1 is a schematic view of an electronic device according to a first embodiment of the present application; FIG. 2 is a diagram of a fingerprint recognition and light-equalizing structure mounted under a display panel according to a first embodiment of the present application; fig. 3 is a cross-sectional view of an electronic device according to a first embodiment of the present application; FIG. 4 is a schematic diagram of a transflective filter according to a first embodiment of the present application; fig. 5 is a schematic diagram of a transflective filter according to another embodiment of the present application.

In a first embodiment of the present application, as shown in fig. 1 and fig. 2, the electronic device 900 is, for example, a smart phone of a full-screen type, and the electronic device 900 includes a display panel 910, an electronic device housing 920 and a fingerprint identification and light equalizing structure 1. The display panel 910 is a thin film transistor liquid crystal display (TFT-LCD) for displaying pictures to a user. The electronic device case 920 is connected to the display panel 910, and an accommodating space is formed between the electronic device case 920 and the display panel 910 to accommodate internal electronic components of the electronic device 900.

In the first embodiment of the present application, as shown in fig. 2 and 3, the fingerprint identification and light equalizing structure 1 is used for identifying fingerprints and providing uniform light to the display panel 910 to prevent dark blocks from being generated in the image displayed on the display panel 910. The fingerprint identification and light-equalizing structure 1 includes a backlight 10, sixteen light-emitting

elements

20, 20a, a transflective filter 30 and a fingerprint camera module 40. The backlight plate 10 is a direct-type panel disposed below the display panel 910, and the backlight plate 10 includes a through hole 11. The backlight 10 is used to cooperate with sixteen

light emitting elements

20, 20a to project light to the display panel 910, so that the display panel 910 displays images.

In the first embodiment of the present application, the sixteen

light emitting elements

20 and 20a are light-emitting diodes (LEDs), and the sixteen

light emitting elements

20 and 20a are disposed on a side of the backlight 10 facing the display panel 910. Twelve of the light emitting members 20 are symmetrically disposed on the backlight 10, and the remaining four light emitting members 20a surround the through hole 11 and are symmetrically disposed on the backlight 10. The sixteen

light emitting elements

20, 20a are used to emit light to the display panel 910, and the backlight 10 can also reflect the light beams to the display panel 910, so that the display panel 910 can obtain sufficient light to display images. However, the number of the

light emitting members

20 and 20a is not limited to sixteen, which may be changed according to design requirements, and the light emitting members 20 are also not limited to a symmetrical arrangement, which may also be changed to an asymmetrical arrangement.

In the first embodiment of the present application, as shown in fig. 2 to 4, the transflective filter 30 is made of glass, polycarbonate or polymethyl methacrylate. The transflective filter 30 is disposed in the through hole 11, and the overall height of the transflective filter 30 does not exceed the through hole 11. The transflective filter 30 includes a substrate 31 and a coating 32, wherein the coating 32 is formed on a side of the substrate 31 facing the backlight 10 by nano-printing. The surface of the plating layer 32 is a trapezoid, the size of the trapezoid of the plating layer 32 can be arbitrarily changed according to the angle of view and the distance of the lens of the fingerprint photographing module 40, and the size of the plating layer 32 can be adjusted according to the application. The non-planar shape of the plating layer 32 of the transflective filter 30 allows a portion of the light emitted from each light emitting element 20a around the through hole 11 to penetrate through the transflective filter 30, and also reflects another portion of the light to the display panel 910, so that the effect of making the light semi-penetrate and the effect of reflecting the light can be achieved. However, the surface of the plating layer is not limited to be trapezoidal, and as shown in the transflective filter 30a of fig. 5, the surface of the plating layer 32a may also be serrated, which also achieves the effect of making light rays semi-penetrate and reflect light rays.

In the first embodiment of the present application, as shown in fig. 1 to 3, the fingerprint camera module 40 is a camera lens with fingerprint identification function, and is located below the transflective filter 30. When a finger of a user presses the display panel 910 at a position corresponding to the transflective filter 30, the fingerprint camera module 40 under the transflective filter 30 shoots a fingerprint of the finger of the user and performs fingerprint recognition.

When a user wants to use the fingerprint recognition and light-equalizing structure 1 to recognize a fingerprint, as shown in fig. 1, the user can press a finger on the display panel 910 at a position corresponding to the transflective filter 30; at this time, as shown in fig. 2 and 3, the light emitted to the light emitting element 20a of the display panel 910 penetrates through the display panel 910 and contacts the finger fingerprint, then is reflected back to the transflective filter 30, and penetrates through the transflective filter 30 and enters the camera lens of the fingerprint camera module 40; therefore, the fingerprint photographing module 40 can obtain the light reflected by the finger fingerprint to obtain the fingerprint image, so that the fingerprint photographing module 40 can perform fingerprint identification.

When a user wants to watch a picture played by the display panel 910, a part of light of the light emitting element 20 is directly emitted to the display panel 910, and another part of light of the light emitting element 20 is emitted to the backlight 10 and then reflected to the display panel 910; in addition, a part of the light emitting element 20a will be directly emitted to the display panel 910, and another part of the light emitting element 20a will be emitted to the backlight 10 or to the transflective filter 30 and then reflected to the display panel 910; thus, the display panel 910 can obtain uniform and sufficient light to display the image. Since the fingerprint camera module 40 is disposed under the transflective filter 30, the fingerprint camera module 40 will not interfere with the light emitted from the light emitting device 20a and the reflected light from the backlight 10 and the transflective filter 30, and thus the image of the display panel 910 will not be affected.

Please refer to fig. 6 together, which is a diagram illustrating a fingerprint recognition and light equalizing structure according to a second embodiment of the present application. Fig. 6 is a schematic view of a backlight plate and a light emitting member according to a second embodiment of the present application.

As shown in fig. 6, the difference between the second embodiment and the first embodiment is that in the second embodiment, sixteen light emitting elements 20 of the fingerprint identification and light equalizing structure 1a are symmetrically disposed on the backlight panel 10, and the light emitting elements 20 are not designed to surround the through holes 11. The light of the light emitting device 20 of the second embodiment can be directly emitted to the display panel 910, or emitted to the backlight 10 or the transflective filter 30 and then reflected to the display panel 910; therefore, the display panel 910 can obtain sufficient light to display the image, and the fingerprint camera module 40 will not interfere with the light emitted by the light emitting device 20 and the reflected light of the backlight 10 and the transflective filter 30, so that the image of the display panel 910 will not be affected.

By means of the design of the fingerprint identification and light equalization structure, the fingerprint identification and light equalization structure is simple in structure, low in installation difficulty and cost, easy to manufacture and suitable for mass production, and extra thickness cannot be increased. The fingerprint camera module can not interfere with the light emitted by the illuminating part and the reflected light of the backlight plate and the semi-penetrating reflective optical filter, so that the picture of the display panel can not be influenced, and the fingerprint camera module can still carry out fingerprint identification.

It should be noted that the above-mentioned embodiments are only examples, and are not limited to the examples. For example, those skilled in the art will recognize that the invention may be practiced without these specific details.

Claims

1. A fingerprint identification and light-equalizing structure, applied to an electronic device, the electronic device including a display panel, the fingerprint identification and light-equalizing structure comprising:

the backlight plate is arranged below the display panel and comprises a through hole;

the plurality of light emitting pieces are arranged on one side of the backlight plate facing the display panel;

a semi-penetrating reflective optical filter arranged in the through hole; and

and the fingerprint camera module is positioned below the semi-penetrating reflective optical filter.

2. The fingerprint and light equalizing structure of claim 1, wherein the transflective filter further comprises a substrate and a coating on a side of the substrate facing the backlight.

3. The fingerprint and light homogenizing structure of claim 2 wherein the surface of the coating is saw-toothed or trapezoidal.

4. The fingerprint identification and light equalization structure of claim 3, wherein said plurality of light emitting elements are symmetrically disposed on said backlight plate.

5. The fingerprint identification and light equalization structure of claim 4, wherein a portion of the light emitting elements are symmetrically disposed on the backlight plate, and another portion of the light emitting elements surround the through hole and are symmetrical to each other.

6. The fingerprint and light homogenizing structure of claim 4 or 5 wherein the transflective filter is made of glass, polycarbonate or polymethyl methacrylate.

7. An electronic device, comprising:

a display panel; and

a fingerprint identification and light equalization structure, comprising:

a semi-penetrating reflective optical filter arranged in the through hole; and

8. The electronic device of claim 7, wherein the transflective filter further comprises a backplane and a coating on a side of the backplane facing the backlight.

9. The electronic device of claim 8, wherein the surface of the plating is serrated or trapezoidal.

10. The electronic device of claim 9, wherein the plurality of light emitting elements are symmetrically disposed on the backlight panel.

11. The electronic device as claimed in claim 10, wherein a portion of the light emitting elements are symmetrically disposed on the backlight plate, and another portion of the light emitting elements surround the through hole and are symmetrical to each other.

12. The electronic device according to claim 10 or 11, wherein the transflective filter is made of glass, polycarbonate or polymethyl methacrylate.