Light guide plate, surface light source device and image display
US7686496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Feb 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide plate has an emission face provided with a plurality of projection rows. Each projection row consists of a pair of slopes, a first slope (a slope far from an incidence end face) and a second slope (another slope near to the incidence end face). An inclination angle of the first slope with respect to an imaginary plane perpendicular to a frontal direction decreases gradually in first region on the emission face (or back face) according to an increasing distance from the incidence end face, then increasing gradually in second region according to an increasing distance from the incidence end face. The inclination angle at an incidence-end-face-side end of first region is greater that at a distal-end-face-side end of second region. Variation of the inclination angle in the first region is greater that in the second region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.