Luminance enhancement structure for reflective display devices
First Claim
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1. A reflective display assembly comprising:
- (a) a display device comprising display cells and a top substrate layer on the viewing side of the display device;
(b) a luminance enhancement structure on top of the display device on the viewing side of the display device, said luminance enhancement structure comprisesi) a top surface,ii) grooves and columns, wherein each of said grooves has a triangular cross-section with a tilted surface, a top point and a top angle, and said grooves and columns are in alternating order and in continuous form only in one direction; and
(c) color filters,whereby an incoming light from a light source on the viewing side of the display device transmits through the luminance enhancement structure, strikes the display device, and the light reflected from the display device and the tilted surface of the grooves reaches the top surface of the luminance enhancement structure.
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Abstract
The present invention is directed to luminance enhancement structure for reflective display devices. The luminance enhancement structure comprises grooves and columns, wherein said grooves have a triangular cross-section and a top angle, and said grooves and columns are in alternating order and in a continuous form in one direction. The luminance enhancement structure not only can reduce the total internal reflection, but also especially can enhance the on-axis brightness of a display device.
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Citations
15 Claims
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1. A reflective display assembly comprising:
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(a) a display device comprising display cells and a top substrate layer on the viewing side of the display device; (b) a luminance enhancement structure on top of the display device on the viewing side of the display device, said luminance enhancement structure comprises i) a top surface, ii) grooves and columns, wherein each of said grooves has a triangular cross-section with a tilted surface, a top point and a top angle, and said grooves and columns are in alternating order and in continuous form only in one direction; and (c) color filters, whereby an incoming light from a light source on the viewing side of the display device transmits through the luminance enhancement structure, strikes the display device, and the light reflected from the display device and the tilted surface of the grooves reaches the top surface of the luminance enhancement structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification