Light guide plate having orthogonal stresses or strains and backlight module therewith
US7806537B2 · kind B2 · utility
1Cited by
4References
9Claims
0Family size
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Inventors
Key dates
| Filing date | Jul 17, 2006 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Jan 16, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0038
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight module includes a light guide plate (52), a light source (51), a reflecting sheet (53), a diffusion sheet (54), and a reflective polarizing beam splitter (57). The light guide plate includes a light input surface (521), a light output surface (522) adjacent to the light input surface, a reflecting surface (523) opposite the light output surface, and a number of microstructures (524) located on the reflecting surface. In the light guide plate, stress-induced birefringence is introduced to achieve a polarization state conversion, thereby facilitating efficient use of the light generated by the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.