Touch panel and touch display device having the same
US9477349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2010 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Sep 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch panel including a light guide plate, a plurality of light sources and a plurality of detectors is provided. The light guide plate has a top surface, a bottom surface, a plurality of side surfaces and a plurality of light incident surfaces. The light sources are disposed at the light incident surfaces of the light guide plate, and the light sources have a photocell total reflection angle (α) and a photocell vertical divergence angle (β) corresponding to the light incident surfaces of the light guide plate, wherein θ<α<60°, θ is a critical angle of the total reflection angle of the light guide plate, and β<50°. The detectors are disposed corresponding to the light sources so as to receive photocell signals from the light sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.