Electronic device and sensor package with optical functional layer thereof

Patent metadata

Field	Value
Publication number	US-12590835-B2
Application number	US-202318373330-A
Country	US
Kind code	B2
Filing date	Sep 27, 2023
Priority date	Sep 27, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A sensor package includes a substrate, a light sensor disposed on the substrate, at least one optical filter disposed on the light sensor, and an optical functional layer that is light-permeable, is disposed on the substrate, covers the light sensor and the optical filter, and includes multiple light-scattering particles. The light sensor has a light receiving region, and receives light through the light receiving region. The optical filter covers the light receiving region. When the light passes through the optical filter within an incident angle range and is received by the light receiving region, the light sensor responds to a wavelength range of the light, and a response spectrum is obtained. Within the incident angle range, an absolute value of an offset measured at a crest of a waveform of the response spectrum is less than or equal to 10 nm. An electronic device is also provided.

First claim

What is claimed is:

1 . A sensor package, comprising:
a substrate; a light sensor disposed on a surface of the substrate, wherein the light sensor includes a light receiving region; an optical filter disposed on the light sensor and covering the light receiving region; and an optical functional layer, being light-permeable, disposed on the substrate and packaging the light sensor and the optical filter, wherein the optical functional layer directly contacts the optical filter, and surfaces of the light sensor that are exposed outside the optical filter, and the optical functional layer has a plurality of light-scattering particles that directly covers the light sensor and the optical filter; wherein, when light enters the optical functional layer and is scattered due to interference of the light-scattering particles, and received by the light receiving region; wherein a top surface of the optical functional layer is spaced apart from the optical filter by a predetermined distance; and wherein the light is emitted to the light receiving region through the optical functional layer and the optical filter, and the predetermined distance is directly proportional to a scattering angle formed when the light passes through the optical functional layer.

2 . The sensor package according to claim 1 , wherein a percentage by weight of the light-scattering particles doped in the optical functional layer ranges between 2% and 10%, and the percentage by weight of the light-scattering particles is directly proportional to the scattering angle formed when the light passes through the optical functional layer.

3 . The sensor package according to claim 1 , wherein the optical filter is an interference filter that is optically coated, or is a color filter that is made of an organic absorption material.

4 . The sensor package according to claim 3 , wherein, when the optical filter is the interference filter, the light sensor responds to a wavelength range of between 400 nm and 650 nm, and a first response spectrum is obtained; or wherein, when the optical filter is the color filter, the light sensor responds to a wavelength range of between 750 nm and 1,100 nm, and a second response spectrum is obtained.

5 . The sensor package according to claim 4 , wherein, when an incident angle of the light ranges between 0 degrees and 30 degrees, an absolute value of an offset measured at a crest of a waveform of one of the first response spectrum and the second response spectrum ranges between 0 nm and 10 nm.

6 . The sensor package according to claim 1 , wherein a lens unit is formed on a top surface of the optical functional layer, and the lens unit is a flat-shaped lens, a convex-shaped lens, or a concave-shaped lens; wherein the lens unit is located above the optical filter, and corresponds in position to the optical filter and the light receiving region.

7 . The sensor package according to claim 6 , further comprising a cover, wherein the cover has at least one opening and is disposed on the substrate, the cover and the substrate jointly define an accommodating chamber, the light sensor, the optical filter, and the optical functional layer are disposed in the accommodating chamber, and the at least one opening is configured to correspond in position to the light receiving region of the light sensor.

8 . The sensor package according to claim 7 , wherein the cover includes a partition disposed in the cover, and a quantity of the at least one opening of the cover is two; wherein the partition divides the accommodating chamber into a first chamber and a second chamber, the two openings are respectively and correspondingly in spatial communication with the first chamber and the second chamber, and the light sensor, the optical filter, and the optical functional layer are disposed in the first chamber.

9 . The sensor package according to claim 8 , further comprising a light-emitting element disposed in the second chamber, wherein one of the openings of the cover that is in spatial communication with the first chamber is a light-receiving hole, another one of the openings of the cover that is in spatial communication with the second chamber is a light-emitting hole, the light-receiving hole corresponds in position to the lens unit, and the light-emitting hole corresponds in position to the light-emitting element.

10 . The sensor package according to claim 9 , further comprising at least one light-permeable member, wherein the at least one light-permeable member is disposed on the cover, and covers the light-emitting hole and the light-receiving hole.

11 . The sensor package according to claim 1 , wherein a particle size of each of the light-scattering particles ranges between 5 μm and 100 μm.

12 . The sensor package according to claim 1 , wherein the light enters the optical functional layer and is scattered due to the interference of the light-scattering particles, and the scattering angle of the light ranges between 40 degrees and 75 degrees.

13 . A sensor package, comprising:
a device body; and the sensor package as claimed in claim 1 , wherein the sensor package is disposed in the device body.

14 . A sensor package, comprising:
a substrate; a light sensor disposed on the substrate, wherein the light sensor has a light receiving region, and receives light through the light receiving region; at least one optical filter disposed on the light sensor and covering the light receiving region; and an optical functional layer being light-permeable and including a plurality of light-scattering particles, wherein the optical functional layer is disposed on the substrate, and covers the light sensor and the at least one optical filter; wherein, when external light passes through the at least one optical filter within an incident angle range and is received by the light receiving region of the light sensor, the light sensor responds to a specific wavelength range of the external light, and a response spectrum is obtained; wherein, within the incident angle range, an absolute value of an offset measured at a crest of a waveform of the response spectrum is less than or equal to 10 nm.

15 . The sensor package according to claim 14 , wherein the at least one optical filter is an interference filter that is optically coated, or is a color filter that is made of an organic absorption material.

16 . The sensor package according to claim 15 , wherein, when the at least one optical filter is the interference filter, the light sensor responds to a wavelength range of between 400 nm and 650 nm, and a response spectrum is obtained; or wherein, when the at least one optical filter is the color filter, the light sensor responds to a wavelength range of between 750 nm and 1,100 nm, and a response spectrum is obtained.

17 . The sensor package according to claim 14 , wherein a particle size of each of the light-scattering particles ranges between 5 μm and 100 μm.

18 . The sensor package according to claim 14 , wherein a top surface of the optical functional layer is spaced apart from the at least one optical filter by a predetermined distance; wherein the light is emitted to the light receiving region through the optical functional layer and the at least one optical filter, and the predetermined distance is directly proportional to a scattering angle formed when the light passes through the optical functional layer.

19 . The sensor package according to claim 14 , wherein a percentage by weight of the light-scattering particles doped in the optical functional

Assignees

• Lite On Singapore Pte Ltd
• Lite On Technology Corp

Inventors

• Zheng Rui-Tao
• Chen Heng-Chang
• Song guang-li
• Lee Wui-Pin
• Lim Sin-Heng

Classifications

• G02B5/0242

  by means of dispersed particles · CPC title

• G01J1/4204

  with determination of ambient light (solar light G01J2001/4266) · CPC title

• G01S7/4816

  of receivers alone · CPC title

• G01S7/4814

  of transmitters alone · CPC title

• G01S7/4813

  Housing arrangements · CPC title