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US 8,941,631 B2Granted
Simultaneous light collection and illumination on an active display
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorsKasra Khazeni, Manish Kothari
Life of this patent
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Abstract
In various embodiments described herein, a display device comprising a light collection film and a photovoltaic device disposed on an edge of the collection film. The collection film has a plurality of light-turning features for redirecting light between the front and back surface of the collection film and the photovoltaic device. In some embodiments, a light source is also disposed on an edge of the collection film and emits light which is turned by the light-turning features toward the display.
Claims34
A display device comprising:
- an active array of reflective display pixels incorporating microelectromechanical systems (MEMS) devices having a front display surface for displaying an image and a back display surface opposite the front display surface;
- at least one collection film in front of the front display surface, the collection film having a front collection film surface, a back collection film surface, at least one edge, and a plurality of light-turning features, wherein the light-turning features are configured to redirect light between the front or back collection film surface and an edge of the collection film;
- a power supply for powering an electrical device;
- and
- a photovoltaic device disposed on the edge of the collection film and configured to receive ambient light laterally transmitted from the light-turning features through the collection film surface and to convert the received ambient light to electric energy for generating and supplying power to the power supply.
2 more elements
A display device comprising:
- an array of display pixels having a front display surface for displaying an image and a back surface;
- at least one collection film disposed over the front of the front display surface, the collection film having a plurality of light-turning features, wherein the light-turning features are configured to redirect light between a front or back collection film surface and edges of the collection film;
- a power supply for powering an electrical device;
- at least one photovoltaic device disposed at a first edge of the collection film, wherein the at least one photovoltaic device is configured to receive incident ambient light turned by the light-turning features of the collection film and to convert the received ambient light to electric energy for generating and supplying power to the power supply;
- and
- at least one light source disposed at a second edge, wherein the light source emits light laterally through the collection film to be turned by the light-turning features toward the array of display pixels.
3 more elements
A display device comprising:
- a display means for displaying and altering images, the display means having a front display surface;
- a light-converting means for generating electric energy from incident ambient light and supplying power from the generated electric energy to an electrical device;
- and
- a light-turning means for turning the ambient light from a direction incident on the front display surface to a lateral direction along the front display surface toward the light-converting means, wherein the light-turning means is formed on the front display surface of the display means,
- wherein the light-turning means is transparent to at least one of:
- ultraviolet light and infrared light.
3 more elements
Dependencies are inferred from the claim text.