Displays with a backlight incorporating reflecting layer

摘要

Displays comprise light control layers (16) in an optical path between a light source (12), such as an array of light emitting diodes and a spatial light modulator (14) such as a liquid crystal display panel. The light control layer comprises an enhanced specular reflector (ESR, 16a) film in optical contact to at least one layer of a transparent or translucent material (16B, 16C). The light control layer transmits light from the light source more readily than the ESR film standing on its own. In some embodiments the display may provide enhanced contrast and peak luminance.

主权项

1. A display comprising:
a light source, a spatial light modulator; and a light control layer in an optical path between the light source and the spatial light modulator, the light control layer comprising:
an enhanced specular reflector layer, anda first optical layer in optical contact with a first side of the enhanced specular reflector layer, the first optical layer at least one of substantially transparent and substantially translucent, whereinan optical transmission coefficient for the light control layer is greater than an optical transmission coefficient for the enhanced specular reflector layer on its own; andwherein the first optical layer is configured such that light control layer increases the ratio of the amount of light energy in a central portion of the point spread function to an amount of light energy in tails of the point spread function by a factor A as follows:A=(ECF/ETF)(ECW/ETW) where:
ECF is the optical energy within one full-width at half maximum of the point spread function in the presence of the light control layer;ETF is the optical energy outside of twice the full width at half-maximum of the point spread function in the presence of the light control layer;ECW is the optical energy within one full-width at half maximum of the point spread function in the absence of the light control layer; andETW is the optical energy outside of twice the full width at half-maximum of the point spread function in the absence of the light control layer.