US Patent:
20200388658, Dec 10, 2020
Inventors:
- WESTBOROUGH MA, US
BORYEU TSAUR - Foster City CA, US
Assignee:
KOPIN CORPORATION - WESTBOROUGH MA
International Classification:
H01L 27/32
H01L 51/52
H01L 51/56
Abstract:
Apparatuses and methods are described to enhance images on an Organic Light Emitting Diode (OLED) display. An OLED device is formed with a first light emitting OLED stack, a charge generating layer (CGL), a second light emitting OLED stack, and a color filter. An OLED display pixel includes three sub-pixels where each subpixel is fabricated with a separate anode and a color filter. A dielectric barrier is disposed between the separate anodes and around the perimeter of each separate anode of the three sub-pixels. In operation, when current flows to a desired sub-pixel of the three sub-pixels, lateral current flow through the CGL to adjacent sub-pixels is impeded, resulting in light generation by the desired sub-pixel and reduction in unwanted light generation at sub-pixels adjacent to the desired sub-pixel. The OLED device can include a micro lens. The micro lens collimates light thereby reducing an aperture of emitted light to increase display brightness.
