| 20100084671 | BRIGHTNESS ENHANCEMENT METHOD AND APPARATUS OF LIGHT EMITTING DIODES - A light source with enhanced brightness includes an angle-selective optical filter and a light emitting diode (LED) having a high reflective layer. The angle-selective filter is located on the top surface of emitting diode to pass lights at specified angles. According to one embodiment, the angle-selective filter comprises index-alternating layers. With a reflective polarizer, the light source can produce polarized light with enhanced brightness. | 04-08-2010 |
