Offsetting non-uniform brightness using a backlight assembly
US10996514B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 2019 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Aug 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133607
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A headset includes a backlight assembly, a display panel, and an optics block. The backlight assembly includes an array of light emitting diodes (LEDs), a diffusing element, and a brightness enhancement film. The array of LEDs and the brightness enhancement film are configured in a way such that the light generated by the backlight assembly has a non-uniform brightness distribution. The display panel receives the light and convert the light to image light. The image light has at least the non-uniform brightness distribution. The optics block includes one or more optical elements that direct the image light to an eyebox of the headset. The optics block adds another non-uniform brightness distribution to the image light to offset the non-uniform brightness distribution from the backlight assembly, such that the image light directed to the eyebox has a target brightness distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.