Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9767719 | Billboard or other large displays having artwork illuminated with an LED backlight array | Kenneth Li | 2017-09-19 |
| 7976204 | Illumination system and method for recycling light to increase the brightness of the light source | Kenneth Li | 2011-07-12 |
| 7357558 | LCD display backlight system with improved color mixing and efficiency | Kenneth Li | 2008-04-15 |
| 6969177 | Polarization recovery system using redirection | Kenneth Li | 2005-11-29 |
| 4757431 | Off-axis application of concave spherical reflectors as condensing and collecting optics | David B. Cross | 1988-07-12 |