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US 2014/0152942 A1Published application
Surface light source device and liquid crystal display device
AssigneeBoe Technology Group Co., Ltd.
InventorsKIMAN KIM, JAEGEON YOU
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Abstract
An surface light source device comprises: a light guide plate; a monochromatic light source located at a side of an incidence surface of the light guide plate; a cholesteric liquid crystal film, a λ/4 wave sheet and a wavelength converting thin film sequentially located at a side of an emission surface of the light guide plate. The surface light source device may improve the utilization rate of light and lower the costs.
Claims9
A surface light source device, comprising:
- a light guide plate;
- a monochromatic light source located at a side of an incidence surface of the light guide plate;
- and
- a cholesteric liquid crystal film, a λ/4 wave sheet and a wavelength converting thin film sequentially located at a side of an emission surface of the light guide plate.
1 more element
Dependencies are inferred from the claim text.