Micro-lens array based light transmitting screen with tunable gain
First Claim
1. A light-transmission screen, comprising:
- a lens array for projecting light, wherein lenses in the lens array are packed so as to define a concentric array of lenses and an x/y array of lenses that is spaced apart from the concentric array of lenses.
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Accused Products
Abstract
A light-transmission screen includes a diffusing element formed from a micro-lens array for projecting images in a viewing space. The screen generates images of improved quality by varying structural features of one or more lenses in the array so that light is directed in different directions and/or with different optical properties compared with other lenses in the array. The structural features which are varied include any one or more of size, shape, curvature, or spacing of the lenses in the array. As a result of these variations, the screen achieves wider viewing angles, improved screen resolution and gain, and a greater ability to reduce or eliminate aliasing or other artifacts in the generated images compared with conventional screens. A method for making a light-transmission screen of this type preferably forms the micro-lens array using a stamping operation based on a master. By taking this approach, the screen is manufactured with fewer process steps and at less cost compared with conventional methods.
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Citations
22 Claims
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1. A light-transmission screen, comprising:
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a lens array for projecting light, wherein lenses in the lens array are packed so as to define a concentric array of lenses and an x/y array of lenses that is spaced apart from the concentric array of lenses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light-transmission screen, comprising:
a lens array for projecting light, comprising three rows of lenses, wherein the first and second rows of lenses are adjacent one another but do not overlap and the third row of lenses overlap the first and second rows by predetermined amounts. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A light-transmission screen, comprising:
an array of lenses for projecting light that extend in a horizontal direction and vertical direction, wherein curvatures of the lenses decrease from a center to an edge of the array in the horizontal direction, and decrease from the center to an edge of the array in the vertical direction by less than the curvatures of the lenses decrease from the center to the edge in the horizontal direction. - View Dependent Claims (18, 19, 20, 21, 22)
Specification