Diffractive exit pupil expander arrangement for display applications
US-12019236-B2 · Jun 25, 2024 · US
US9028124B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9028124-B2 |
| Application number | US-201313792164-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 10, 2013 |
| Priority date | Jan 20, 2013 |
| Publication date | May 12, 2015 |
| Grant date | May 12, 2015 |
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A backlight module includes a light guide plate and a number of light sources. The light guide plate includes a frosted light incident surface, diffusion structures positioned on the frosted light incident surface, and dot-shaped micro-recesses positioned on the diffusion structures. The light sources face the frosted light incident surface.
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What is claimed is: 1. A backlight module comprising: a light guide plate comprising: a frosted light incident surface; a plurality of diffusion structures positioned on the frosted light incident surface; and a plurality of dot-shaped micro-recesses positioned on the diffusion structures; and a plurality of light sources facing the frosted light incident surface. 2. The backlight module of claim 1 , wherein the dot-shaped micro-recesses are random…
Physics · mapped topic
Physics · mapped topic
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