Organic light-enitting diode display panel for fingerprint recognition and electronic device

• US 10,089,515 B2
• Filed: 05/02/2017
• Issued: 10/02/2018
• Est. Priority Date: 11/28/2016
• Status: Active Grant

• Current Assignee: Nanchang O-film Bio-Identification Technology Co., Ltd. (OFILM Group Co., Ltd.)
• Original Assignee: Nanchang O-film Bio-Identification Technology Co., Ltd. (OFILM Group Co., Ltd.)
• Inventors: Luo, Jianfeng, Guan, Saixin
• Primary Examiner(s): Seth, Manav
• Application Number:
  US15/585,036
• Publication Number:
  US 20180150669A1
• Time in Patent Office: 518 Days
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1359 Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors

Abstract

An organic light-emitting diode display panel for fingerprint recognition includes a glass substrate, a pixel layer, and a transparent substrate, which are laminated; the pixel layer includes a plurality of pixel units arranged on the glass substrate in arrays, wherein the plurality of pixel units are configured to emit light of multiple colors which are combined to form a colorful image; the transparent substrate includes a first side and a second side, which are disposed opposite to each other, the first side is fitted on the pixel layer, a plurality of light receiving units are arranged on a surface of the second side, and an orthographic projection of each light receiving unit on the transparent substrate is located in a gap between the adjacent pixel units. An electronic device is also provided.

Claims

1. An organic light-emitting diode (OLED) display panel for fingerprint recognition, comprising:

a glass substrate;

a pixel layer comprising a plurality of pixel units arranged on the glass substrate in arrays, wherein the plurality of pixel units are configured to emit light of multiple colors which are combined to form a colorful image;

a transparent substrate having opposed first and second sides, the first side being attached to the pixel layer; and

a plurality of light receiving units arranged on the second side, wherein an orthographic projection of each light receiving unit on the transparent substrate is located in a gap between the adjacent pixel units.

2. The OLED display panel of claim 1, further comprising a filter located on a surface of the light receiving unit away from the transparent substrate, wherein the filter allows the light of a first wavelength to pass, thereby enabling the light receiving unit to sense the light of the first wavelength.

3. The OLED display panel of claim 1, further comprising a plurality of light emitting units arranged on the second side, wherein an orthographic projection of each light emitting unit on the transparent substrate is located in the gap between the adjacent pixel units.

4. The OLED display panel of claim 3, wherein the light emitting unit is an infrared emitter, and the light receiving unit is an infrared photodiode configured to sense infrared light emitted from the infrared emitter.

5. The OLED display panel of claim 3, wherein the light emitting unit is a visible light emitter configured to emit sensing light of a second wavelength, and the light receiving unit is a photodiode configured to sense the sensing light and the light of a first wavelength.

6. The OLED display panel of claim 3, wherein the light emitting unit is a visible light emitter configured to emit sensing light of a third wavelength;

the OLED display panel further comprises a filter located on a surface of the light receiving unit, the filter allows the sensing light and light of the third wavelength to pass;

the light receiving unit is a photodiode configured to sense the sensing light and the light of the third wavelength.

7. The OLED display panel of claim 3, wherein the light emitting unit and the light receiving unit are arranged adjacent to each other on the transparent substrate.

8. The OLED display panel of claim 1, wherein the transparent substrate is made of glass.

9. The OLED display panel of claim 1, wherein the transparent substrate is made of polymethyl methacrylate.

10. The OLED display panel of claim 1, wherein the pixel unit comprises a mental cathode, a mental anode, and an organic luminescent layer sandwiched between the mental cathode and the mental anode;

the organic luminescent layer is configured to control a brightness of the light emitted from the organic luminescent layer according to a voltage applied between the mental cathode and the mental anode.

11. The OLED display panel of claim 10, wherein the organic luminescent layer comprises a red sub-pixel unit, a green sub-pixel unit, and a blue sub-pixel unit, which are arranged in parallel on the mental anode;

the red sub-pixel unit is configured to emit red light, the green sub-pixel unit is configured to emit green light, and the blue sub-pixel unit is configured to emit the blue light.

12. The OLED display panel of claim 10, wherein the organic luminescent layer comprises an electron transmission layer, an electron injection layer, a luminescent material layer, a hole injection layer, and a hole transmission layer, which are sequentially laminated.

13. An electronic device, comprising:

an OLED display panel comprising;

a glass substrate;

a pixel layer comprising a plurality of pixel units arranged on the glass substrate in arrays, wherein the plurality of pixel units are configured to emit light of multiple colors which are combined to form a colorful image;

a transparent substrate having opposed first and second sides, the first side being attached to the pixel layer; and

a plurality of light receiving units arranged on a surface of the second side, wherein an orthographic projection of each light receiving unit on the transparent substrate is located in a gap between the adjacent pixel units;

the glass substrate, the pixel layer and the transparent substrate are laminated; and

a motherboard electrically coupled to the OLED display panel, wherein the motherboard is configured to control the pixel unit to display image and process a fingerprint signal sent from the light receiving unit.

14. The electronic device of claim 13, further comprising a filter located on a surface of the light receiving unit away from the transparent substrate, wherein the filter allows the light of a first wavelength to pass, thereby enabling the light receiving unit to sense the light of the first wavelength.

15. The electronic device of claim 13, further comprising a plurality of light emitting units arranged on the surface of the second side, wherein an orthographic projection of each light emitting unit on the transparent substrate is located in the gap between the adjacent pixel units.

16. The electronic device of claim 15, wherein the light emitting unit is an infrared emitter, and the light receiving unit is an infrared photodiode configured to sense infrared light emitted from the infrared emitter.

17. The electronic device of claim 15, wherein the light emitting unit is a visible light emitter configured to emit sensing light of a second wavelength, and the light receiving unit is a photodiode configured to sense the sensing light and the light of a first wavelength.

18. The electronic device of claim 15, wherein the light emitting unit is the visible light emitter configured to emit sensing light of a third wavelength;

the OLED display panel further comprises a filter located on a surface of the light receiving unit, the filter allows the sensing light and light of the third wavelength to pass;

the light receiving unit is a photodiode configured to sense the sensing light and the light of the third wavelength.

19. The electronic device of claim 15, wherein the light emitting unit and the light receiving unit are arranged adjacent to each other on the transparent substrate.

20. The electronic device of claim 13, wherein the pixel unit comprises a mental cathode, a mental anode, and an organic luminescent layer sandwiched between the mental cathode and the mental anode;

the organic luminescent layer is configured to control a brightness of the light emitted from the organic luminescent layer according to a voltage applied between the mental cathode and the mental anode.