Proximity sensing device

Patent metadata

Field	Value
Publication number	US-10895641-B2
Application number	US-201916363829-A
Country	US
Kind code	B2
Filing date	Mar 25, 2019
Priority date	Oct 15, 2018
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

A proximity sensing device which is disposed under the OLED panel and has an emitting module and a receiving module, is provided. The emitting module can emit an invisible light which has a peak wavelength not less than 1000 nm. The receiving module is disposed adjacent to the emitting module and can receive a reflecting light from the reflected invisible light. Therefore, the invisible light passing through the OLED panel will not cause a bright spot on the panel.

First claim

What is claimed is:

1. A proximity sensing device disposed under an OLED panel, comprising:
an emitting module, being configured to emit an invisible light which has a peak wavelength not less than 1000 nm; and
a receiving module, being disposed adjacent to the emitting module and configured to receive a reflected light of the invisible light;
wherein the emitting module includes one or more emitting elements, wherein each emitting element includes a semiconductor chip and a light converting structure, wherein the semiconductor chip is configured to emit a visible light, and the light converting structure is disposed on the semiconductor chip and includes an adhesive and a fluorescent material, wherein the fluorescent material is disposed in the adhesive to convert the visible light into the invisible light.

2. The proximity sensing device of claim 1 , wherein the peak wavelength of the invisible light emitted by the emitting module is not greater than 1580 nm.

3. The proximity sensing device of claim 1 , wherein the receiving module comprises one or a plurality of sensing elements.

4. The proximity sensing device of Claim 1 , wherein the emitting element further comprises a light absorbing layer, and the light absorbing layer is disposed on the light converting structure to absorb the visible light.

5. The proximity sensing device of Claim 1 , wherein the light converting structure further comprises a light absorbing material, and the light absorbing material is disposed in the adhesive to absorb a part of the visible light.

6. The proximity sensing device of Claim 1 , wherein the emitting element further comprises a light filtering layer, and the light filtering layer is disposed on the light converting structure to block the visible light.

7. The proximity sensing device of Claim 1 , wherein the semiconductor chip is a blue light chip, a blue light emitting diode, or a blue laser diode.

8. A display device, comprising:
an OLED panel; and
a proximity sensing device of claim 1 , being disposed under the OLED panel to be shielded by the OLED panel.

9. The display device of claim 8 , wherein the peak wavelength of the invisible light emitted by the emitting module is not greater than 1580 nm.

10. The display device of claim 8 , wherein the receiving module comprises one or a plurality of sensing elements.

11. The display device of claim 8 , wherein the emitting element further comprises a light absorbing layer, and the light absorbing layer is disposed on the light converting structure to absorb the visible light.

12. The display device of claim 8 , wherein the light converting structure further comprises a light absorbing material, and the light absorbing material is disposed in the adhesive to absorb a part of the visible light.

13. The display device of claim 8 , wherein the emitting element further comprises a light filtering layer, and the light filtering layer is disposed on the light converting structure to block the visible light.

14. The display device of claim 8 , wherein the semiconductor chip is a blue light chip, a blue light emitting diode, or a blue laser diode.

Assignees

• Everlight Electronics Co Ltd

Inventors

• Lai Shih-Wen
• Huang Yi-Ting
• Lai Jing-Hong
• Hsu Chih-Hao
• Yang Chia-Wei
• Lin Chih-Min
• Kang Chieh-Yu
• Lu Kuang-Mao
• FAN Jian-hong

Classifications

• H10K59/70

  OLEDs integrated with inorganic light-emitting elements, e.g. with inorganic electroluminescent elements · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• H04M2250/12

  including a sensor for measuring a physical value, e.g. temperature or motion · CPC title

• H04M1/0266

  for a display module assembly · CPC title