Sensor assembly and a device comprising such sensor assembly

Patent metadata

Field	Value
Publication number	US-11092479-B2
Application number	US-201816623129-A
Country	US
Kind code	B2
Filing date	Jun 12, 2018
Priority date	Jun 19, 2017
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A sensor assembly, comprising a housing having a receiving window covered by an optically transparent cover. The housing accommodates electric components, at least comprising a motion sensor and an ambient light sensor. The motion sensor and the ambient light sensor are positioned such that light entering the cover impinges on the motion sensor and the ambient light sensor. Between the cover and the ambient light sensor is an optical diffuser positioned, such that light entering the cover traverses the optical diffuser before impinging on the ambient light sensor. The sensor assembly may be used separately or incorporated in an electric or electronic device.

First claim

The invention claimed is:

1. A sensor assembly, comprising a housing having a receiving window covered by an optically transparent cover, said housing accommodating electric components at least comprising a motion sensor and an ambient light sensor, wherein the motion sensor is separate from the ambient light sensor, and wherein said receiving window is common to said motion sensor and said ambient light sensor, said motion sensor and said ambient light sensor are positioned such that light entering said cover impinges on said motion sensor and said ambient light sensor, and an optical diffuser, positioned between said cover and said ambient light sensor, such that light entering said cover traverses said optical diffuser before impinging on said ambient light sensor; wherein the optical diffuser is separate from the cover, and wherein the sensor assembly further comprises a Printed Circuit Board, PCB, at which said electric components are mounted.

2. The sensor assembly according to claim 1 , wherein said electric components further comprise an Infra-Red, IR, sensor positioned such that light entering said cover impinges on said IR sensor.

3. The sensor assembly according to claim 1 , wherein said electric components further comprise a Light Emitting Diode, LED, indicator and a light guide, wherein said light guide is optically coupled to said LED and is arranged for directing light input from said LED to an exterior portion of said housing.

4. The sensor assembly according to claim 3 , wherein said light guide is arranged for directing light input from said LED through said cover.

5. The sensor assembly according to claim 1 , wherein said motion sensor is a Passive Infra-Red, PIR, sensor.

6. The sensor assembly according to claim 1 , wherein said optically transparent cover is made of a material that is at least transparent to any of Near Infra-Red, NIR, Far Infra-Red, FIR, and visible light.

7. The sensor assembly according to claim 1 , wherein said optically transparent cover comprises a Fresnel lens arranged for providing a detection field of view of said motion sensor.

8. The sensor assembly according to claim 1 , wherein, said optical diffuser is positioned on top of said ambient light sensor, and wherein the optical diffuser is spaced a distance from the cover.

9. The sensor assembly according to claim 1 , wherein said optical diffuser includes a visible light diffusion area and the optical diffuser is arranged for diffusing visible light.

10. The sensor assembly according to claim 1 wherein said electric components further comprise processing circuitry arranged for controlling and processing signals generated by any of said electric components accommodated by said housing.

11. The sensor assembly according to claim 1 , wherein said housing is comprised of a single, integral structure.

12. The sensor assembly according to claim 1 , wherein said window substantially completely extends over a surface of said housing.

13. The sensor assembly according to claim 1 , further comprising a sealing component arranged for sealing an interface of said window and said optically transparent cover, for protecting components accommodated by said housing from external atmospheric factors.

14. An electric or electronic device comprising a sensor assembly according to claim 1 .

Assignees

• Signify Holding Bv

Inventors

• Wang Zhipei
• Chen Shangwu
• Ye Minghua

Classifications

• G08B5/36

  using visible light sources · CPC title

• G01J1/0271 Primary

  Housings; Attachments or accessories for photometers · CPC title

• G08B13/194

  using image scanning and comparing systems · CPC title

• G01J1/4204

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

• G08B13/193

  using focusing means · CPC title