Back-lit displays with high illumination uniformity
First Claim
1. A directly illuminated display unit, comprising:
- a display panel;
one or more light sources disposed behind the display panel and capable of producing illumination light;
a diffuser disposed between the one or more light sources and the display panel; and
a light diverting layer disposed between the one or more light sources and the diffuser, the light diverting layer comprising light diverting members disposed on a first face of the light diverting layer facing the diffuser, at least one of the light diverting members having a surface with at least one sharp change in slope and having a first side and a second side, the first and second sides of the light diverting members each comprising at least one of a plurality of facets and a curved surface, the first side having a first best fit center of curvature and the second side having a second best fit center of curvature, the positions of the first and second best fit centers of curvature being different.
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Accused Products
Abstract
A directly illuminated display unit has a display panel and one or more light sources disposed behind the display panel. A diffuser is disposed between the light source unit and the display panel and a light diverting layer is disposed between the one or more light sources and the diffuser. The light diverting layer has light diverting members on a first side of the light diverting layer facing the diffuser. Surfaces of the light diverting members are disposed at more than one angle relative to a normal to the light diverting layer and also include one or more sharp changes of surface slope. The light diverting members spread the illumination light so as to be more uniform. Different light diverting members can have different apex angles. Also, different sides of a light diverting member can have best fit centers of curvature that are non-coincident.
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Citations
24 Claims
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1. A directly illuminated display unit, comprising:
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a display panel; one or more light sources disposed behind the display panel and capable of producing illumination light; a diffuser disposed between the one or more light sources and the display panel; and a light diverting layer disposed between the one or more light sources and the diffuser, the light diverting layer comprising light diverting members disposed on a first face of the light diverting layer facing the diffuser, at least one of the light diverting members having a surface with at least one sharp change in slope and having a first side and a second side, the first and second sides of the light diverting members each comprising at least one of a plurality of facets and a curved surface, the first side having a first best fit center of curvature and the second side having a second best fit center of curvature, the positions of the first and second best fit centers of curvature being different. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification