Systems and methods for controlling backlight output characteristics
US9690038B2 · kind B2 · utility
Assignee
Inventors
- Gary T. Boyd
- Ji Young Choi
- John T. Cowher
- Yasuyuki Daigo
- Kenneth A. Epstein
- Shandon Dee Hart
- Charles D. Hoyle
- Min-Young Ji
- Chideuk Kim
- Byung-Soo Ko
- Keith M. Kotchick
- Wade D. Kretman
- David J. Lamb
- Seo-Hern Lee
- Eric W. Nelson
- Youngsoo Park
- Xianneng Peng
- Yuji Saito
- Naoya Taniguchi
- John F. Van Derlofske, III
- Leland R. Whitney
- Xingpeng Yang
- Yang Yu
- Jie Zhou
- Rui Zhang
Key dates
| Filing date | Jun 20, 2008 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | Mar 5, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight includes a light source and one or more light recycling films. The light source generates light that exits the light source with an angular exit distribution. The light recycling films are oriented in relation to the light source so that the prism peaks of the recycling films are oriented away from the light source. The recycling films have a range of optimal incident angles that allow light to pass through the recycling films without recycling. The components of the light source, the characteristics of the recycling films, or both, are configured to control the overlap between the exit distribution of the light source and the optimal incident angle range of the recycling films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.