LCD display with multifaceted back reflector
First Claim
Patent Images
1. A transparent display device comprising:
- a transparent LCD display cell having front and back sides,a multifaceted back reflector disposed adjacent the back side of said cell, said back reflector comprising at least three repeated reflecting facets angularly displaced with respect to the front side of said cell, said reflecting facets oriented to concentrate reflected light in a preselected direction and repeated in a periodic array having a period of repetition in the range from 1 to 50 mils.
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Abstract
In accordance with the present invention, a transparent display, such as an LCD, is provided with back reflector having a plurality of reflecting facets angularly displaced with respect to the plane of the display cell so as to enhance contrast of the display without consumption of additional power while reducing glare. Advantageously the reflecting facets are oriented to concentrate reflection to a viewer of light above the viewer and light coming from over the viewer'"'"'s shoulder. The result of such concentration is a display having backlit visual characteristics without the consumption of backlighting power. Preferred embodiments are disclosed for vertical and horizontal mounting.
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Citations
10 Claims
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1. A transparent display device comprising:
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a transparent LCD display cell having front and back sides, a multifaceted back reflector disposed adjacent the back side of said cell, said back reflector comprising at least three repeated reflecting facets angularly displaced with respect to the front side of said cell, said reflecting facets oriented to concentrate reflected light in a preselected direction and repeated in a periodic array having a period of repetition in the range from 1 to 50 mils. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10)
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4. A transparent display device comprising:
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a transparent display cell having a back side and a planar front side and a multifaceted back reflector disposed adjacent the back side of said cell, said back reflector comprising a repeated array of four reflecting facets oriented at respective angles with respect to said front side, of 104°
±
5°
, 10°
±
5°
, 157°
±
5° and
45°
±
5°
.
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5. A transparent display device comprising:
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a transparent display cell having a back side and a planar front side, and a multifaceted back reflector disposed adjacent the back side of said cell, said back reflector comprising a repeated array of four reflecting facets oriented at respective angles with respect to said front side of 200°
±
5°
, 0°
±
5°
, 225°
±
5° and
140°
±
5°
.
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Specification