Biological detection device and processing method of the same

• US 10,367,114 B2
• Filed: 05/31/2017
• Issued: 07/30/2019
• Est. Priority Date: 01/14/2016
• Status: Active Grant

• Current Assignee: Shenzhen Goodix Technology Co., Ltd.
• Original Assignee: Shenzhen Goodix Technology Co., Ltd.
• Inventors: Hou, Lyu, Zhang, Shengbin
• Primary Examiner(s): Lee, Cheung
• Application Number:
  US15/610,618
• Publication Number:
  US 20170271546A1
• Time in Patent Office: 790 Days
• Field of Search: None
• CPC Class Codes: G06V 10/143 Sensing or illuminating at different wavelengths
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1329 Protecting the fingerprint sensor against damage caused by the finger
• CPC Class Codes: G06V 40/1394 using acquisition arrangements
• CPC Class Codes: H01L 27/14678 Contact-type imagers
• CPC Class Codes: H01L 27/14685 Process for coatings or optical elements
• CPC Class Codes: H01L 31/02002 Arrangements for conducting electric current to or from the device in operations
• CPC Class Codes: H01L 31/02327 the optical elements being integrated or being directly associated to the device, e.g. back reflectors optical coatings H01L31/0216
• CPC Class Codes: H01L 31/16 the semiconductor device sensitive to radiation being controlled by the light source or sources

Abstract

The present disclosure provides a biological detection device and a processing method of the same. The biological detection device comprises a chip, a light emitter, a circuit board and a covering layer. The chip comprises a photoelectric converter, and the covering layer is covered on the chip, the photoelectric converter and the light emitter; the covering layer is light transmissive; the light emitter emits light; the photoelectric converter receives the light emitted by the light emitter, and is further used for performing photoelectric converting on the light so as to obtain an electrical signal; the chip detects an object to be detected according to the electrical signal; and the circuit board provides a communication channel and power supply for the chip and the light emitter. The technical solution of the present disclosure can improve flexibility of using the biological detection device, and prevent fingerprint recognition from being cracked by prosthesis.

Claims

1. A biological detection device, comprising:

a chip, a light emitter, a circuit board and a covering layer;

wherein the chip comprises a photoelectric converter, the covering layer is covered on the chip, the photoelectric converter and the light emitter;

the covering layer is passed through by light emitted by the light emitter;

the photoelectric converter receives light reflected by an object to be detected through the covering layer, wherein the light is emitted by the light emitter and irradiates the object to be detected through the covering layer;

the photoelectric converter performs photoelectric converting on the reflected light to obtain an electrical signal;

the chip detects the object to be detected according to the electrical signal; and

the circuit board provides a communication channel and power supply for the chip, the light emitter and the photoelectric converter;

wherein the light emitter is at least used for emitting infrared light, and the covering layer comprises a protection layer and a color layer;

wherein the color layer comprises at least one layer of infrared ray (IR) oil ink.

2. The biological detection device according to claim 1, wherein the light emitter is integrated on the chip.

3. The biological detection device according to claim 2, wherein the covering layer comprises a thin film, and light transmittance of all or part of the thin film to the light emitted by the light emitter is greater than or equal to 30%.

4. The biological detection device according to claim 1, wherein adhesive force between the protection layer and the color layer is greater than or equal to 3 B;

light transmittance of the protection layer to the light emitted by the light emitter is greater than or equal to 30%, used for protecting the color layer; and

light transmittance of all or part of the color layer to the light emitted by the light emitter is greater than or equal to 30%, thickness of the color layer ranges between 5 nm and 50 μ

m, permittivity of the color layer is greater than 2, and the color layer is used for providing an appearance color of the biological detection device.

5. The biological detection device according to claim 4, wherein the protection layer is a cover plate, and a material of the cover plate is glass, sapphire, ceramic, acrylic or plastic cement;

and

the covering layer is connected on the chip, the photoelectric converter and the light emitter through glue or a thin film, thickness of the glue or thin film ranges between 5 μ

m and 150 μ

m, permittivity of the glue or thin film is within 1 to 10, and light transmittance of the glue or thin film is greater than and equal to 90%.

6. The biological detection device according to claim 4, wherein the protection layer is a hardness layer, thickness of the hardness layer ranges between 2 μ

m and 25 μ

m, a Mohs hardness of the hardness layer is greater than or equal to 3, and permittivity of the hardness layer is within 1 to 10; and

the color layer is attached to the chip, the photoelectric converter and the light emitter in a manner of spraying, adhesive force between the color layer and the chip, the photoelectric converter and the light emitter is greater than or equal to 3 B, and the hardness layer is attached to the color layer in a manner of spraying.

7. The biological detection device according to claim 1,

wherein

the color layer further comprises at least one layer of conventional oil ink, and pores are opened at a partial position of the at least one layer of conventional oil ink.

8. The biological detection device according to claim 1,

wherein the light emitter is used for emitting infrared light and red light;

and

the color layer comprises at least one layer of conventional oil ink, and pores are opened at a partial position of the at least one layer of conventional oil ink.

9. The biological detection device according to claim 1, wherein the chip is soldered on the circuit board via solder paste or silver paste using plane soldering technology, and thickness of the solder paste or silver paste between the chip and the circuit board ranges between 20 μ

m and 120 μ

m.

10. The biological detection device according to claim 1, wherein the biological detection device further comprises a ring soldered on the circuit board via solder paste or silver paste using plane soldering technology, and thickness of the solder paste or silver paste between the ring and the circuit board ranges between 40 μ

m and 140 μ

m; and

the ring surrounds the chip, the light emitter and the photoelectric converter.

11. The biological detection device according to claim 1, wherein the chip performs at least one of fingerprint detection, heart rate detection, pressure detection, key press detection, blood oxygen detection, blood pressure detection and living body detection on the object to be detected according to the electrical signal.

12. A processing method of a biological detection device, wherein the biological detection device is the biological detection device of claim 1;

and

the processing method comprises;

integrating the photoelectric converter on the chip;

fixing the chip on the circuit board; and

covering the covering layer on the chip, the photoelectric converter and the light emitter.

13. The processing method according to claim 12, wherein the processing method further comprises integrating the light emitter on the chip.

14. The processing method according to claim 13, wherein covering the covering layer on the chip, the photoelectric converter and the light emitter comprises:

silk screening or spraying oil ink on the chip, the photoelectric converter and the light emitter, the oil ink forming a color layer, wherein an adhesive force between the color layer and the chip, the photoelectric converter and the light emitter is greater than or equal to 3 B;

light transmittance of all or part of the color layer to the light emitted by the light emitter is greater than or equal to 30%, thickness of the color layer ranges between 5 nm and 50 μ

m, permittivity of the color layer is greater than 2; and

silk screening a hardness layer on the color layer, wherein an adhesive force between the color layer and the hardness layer is greater than or equal to 3 B;

thickness of the hardness layer ranges between 2 μ

m and 25 μ

m, Mohs hardness of the hardness layer is greater than or equal to 3, and permittivity of the hardness layer is within 1 to 10.

15. The processing method according to claim 14, wherein the light emitter is used for emitting infrared light,

wherein the silk screening or spraying oil ink on the chip, the photoelectric converter and the light emitter comprises:

silk screening or spraying at least one layer of infrared ray (IR) oil ink on the chip, the photoelectric converter and the light emitter;

or

silk screening or spraying at least one layer of infrared ray (IR) oil ink and at least one layer of conventional oil ink on the chip, the photoelectric converter and the light emitter, and opening pores at a partial position of the at least one layer of conventional oil ink.

16. The processing method according to claim 14, wherein the light emitter is used for emitting infrared light and red light,

wherein the silk screening or spraying oil ink on the chip, the photoelectric converter and the light emitter comprises:

silk screening or spraying at least one layer of conventional oil ink on the chip, the photoelectric converter and the light emitter; and

opening pores at a partial position of the at least one layer of conventional oil ink.

17. The processing method according to claim 13, wherein covering the covering layer on the chip, the photoelectric converter and the light emitter comprises:

silk screening or heat transfer printing oil ink on a transparent or semi-transparent thin film, and light transmittance of the thin film and the oil ink to the light emitted by the light emitter being greater than or equal to 30%;

or opening pores at a partial position of a colored thin film so that the light transmittance of the thin film at the pore portion to the light emitted by the light emitter is greater than or equal to 30%; and

covering the thin film on the chip, the photoelectric converter and the light emitter.

18. The processing method according to claim 12, wherein covering the covering layer on the chip, the photoelectric converter and the light emitter comprises:

silk screening or spraying oil ink on a cover plate, the oil ink forming a color layer, the color layer and the cover plate forming the covering layer, wherein adhesive force between the color layer and the cover plate is greater than or equal to 3 B;

a material of the cover plate is glass, sapphire, ceramic, acrylic or plastic cement;

light transmittance of the cover plate to the light emitted by the light emitter is greater than or equal to 30%;

light transmittance of all or part of the color layer to the light emitted by the light emitter is greater than or equal to 30%, thickness of the color layer ranges between 5 nm and 50 μ

m, and permittivity of the color layer is greater than 2; and

connecting the covering layer on the chip, the photoelectric converter and the light emitter through glue or a thin film, wherein thickness of the glue ranges between 5 μ

m and 150 μ

m, permittivity of the glue is within 1 to 10, and light transmittance of the glue is greater than and equal to 90%.

19. The processing method according to claim 18, wherein the light emitter is used for emitting infrared light,

wherein the silk screening or spraying oil ink on the cover plate comprises:

silk screening or spraying at least one layer of infrared ray (IR) oil ink on the cover plate;

or

silk screening or spraying at least one layer of infrared ray (IR) oil ink and at least one layer of conventional oil ink on the cover plate, and opening pores at a partial position of the at least one layer of conventional oil ink.

20. The processing method according to claim 18, wherein the light emitter is used for emitting infrared light and red light,

wherein the silk screening or spraying oil ink on the cover plate comprises:

silk screening or spraying at least one layer of conventional oil ink on the cover plate; and

opening pores at a partial position of the at least one layer of conventional oil ink.