Liquid crystal display using a plurality of light adjusting sheets angled at 5 degrees or more
US5394255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1993 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Jan 26, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0053
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light adjusting sheet for a planar lighting device includes a plurality of convex and concave streaks arranged alternately and approximately parallel to each other on one surface. The streaks may have a cross section of a sine curve. Another light adjusting sheet consists of a plurality of single sheets each having the above configulation, stacked together. A planar lighting device includes the light adjusting sheet of the above configulation, wherein peak lines of the convex streaks and bottom lines of the concave streaks are arranged to make a predetermined angle with an axis of a linear light source. The liquid crystal display includes a liquid crystal display element placed on front of the planar lighting device of the above configulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.