BACKLIGHT MODULE WITH DIFFUSION SHEET HAVING A SUB-WAVELENGTH GRATING
First Claim
Patent Images
1. A diffusion sheet comprising:
- a light incident surface; and
a light emitting surface opposite to the light incident surface, the light emitting surface comprising a sub-wavelength grating formed thereat, the sub-wavelength grating being configured to avoid or reduce total internal reflection of light at the light emitting surface.
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Accused Products
Abstract
A diffusion sheet includes a light incident surface and a light emitting surface opposite to the light incident surface. The light emitting surface includes a sub-wavelength grating to diffuse lights propagated in the diffusion sheet. The sub-wavelength grating is used to avoid a total internal reflection of some of the lights. A backlight module having the diffusion sheet is also provided.
4 Citations
12 Claims
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1. A diffusion sheet comprising:
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a light incident surface; and a light emitting surface opposite to the light incident surface, the light emitting surface comprising a sub-wavelength grating formed thereat, the sub-wavelength grating being configured to avoid or reduce total internal reflection of light at the light emitting surface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A backlight module comprising
a plurality of aligned point light sources; - and
a diffusion sheet adjacent to the light source, the diffusion sheet comprising a light incident surface for receiving light from the point light sources and a light emitting surface opposite to the light incident surface, the light emitting surface comprising a sub-wavelength grating formed thereat, the sub-wavelength grating being configured to avoid or reduce total internal reflection of the light. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification