Title:
AMBIENT LIGHT DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/107881
Kind Code:
A1
Abstract:
Disclosed is an electronic device having an ambient light detection system. The ambient light detection system comprises: an optical window (300), a micro/nano optical element (401) and an ambient light sensor (402), wherein the micro/nano optical element (401) is located between the optical window (300) and the ambient light sensor (402). The ambient light detection system is used for making light rays from the optical window (300) incident on the micro/nano optical element (401) and pass through the micro/nano optical element (401) so same are received by the ambient light sensor (402). The micro/nano optical element (401) has a micro/nano optical structure (403), the micro/nano optical structure (403) being used to change the direction of incident light rays. The use of the micro/nano optical element (401) to change the incident light path reduces loss of incident light due to absorption and reflection, and the loss of light rays when passing through the micro/nano optical element (401) is less, increasing the range of light received by the ambient light sensor (402).
Inventors:
WANG YU (CN)
YU FENG (CN)
LI JIZHEN (CN)
YU FENG (CN)
LI JIZHEN (CN)
Application Number:
PCT/CN2017/105696
Publication Date:
June 21, 2018
Filing Date:
October 11, 2017
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G01J1/04
Foreign References:
| CN106644061A | 2017-05-10 | |||
| CN101581603A | 2009-11-18 | |||
| CN102854551A | 2013-01-02 | |||
| CN2826458Y | 2006-10-11 | |||
| CN101840011A | 2010-09-22 | |||
| US20070176081A1 | 2007-08-02 |
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