Title:
OPTICAL TOUCH SENSING FOR DISPLAYS AND OTHER APPLICATIONS
Document Type and Number:
WIPO Patent Application WO/2018/214691
Kind Code:
A1
Abstract:
Touch sensing based on optical sensing as disclosed herein can be implemented by using an optical stylus (213) or pointer (213) that emits probe light for optical sensing, and spatially distributed optical sensors (221, 223, 225, 227) at different spatial locations for sensing. The measurements from the different optical sensors (221, 223, 225, 227) can be processed to determine the position (214) of the light from the optical stylus (213) at the screen. Optical sensing of a position (214) on a two-dimensional surface and a position in a three-dimensional space can be achieved for various optical touch sensing applications. An apparatus can include a screen (211) or display, an optical stylus (213) or optical pointer (213), and two or more optical angle sensors (221, 223, 225, 227) which determine, respectively, a first angle between the first optical angle sensor and a position (214) of light at the screen (211) and a second angle between the second optical angle sensor and the position (214) of light at the screen (211).
Inventors:
HE YI (CN)
PI BO (CN)
PI BO (CN)
Application Number:
PCT/CN2018/084429
Publication Date:
November 29, 2018
Filing Date:
April 25, 2018
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
G06F3/042
Foreign References:
| CN102375616A | 2012-03-14 | |||
| CN104345990A | 2015-02-11 | |||
| JP2015056064A | 2015-03-23 | |||
| CN101937289A | 2011-01-05 | |||
| CN103399671A | 2013-11-20 | |||
| CN104657000A | 2015-05-27 |
Other References:
See also references of EP 3519928A4
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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