Apparatus and method of dual-mode display
AssigneeQUALCOMM MEMS Technologies, Inc.
InventorJe-Hsiung Lan
Life of this patent
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Abstract
One embodiment includes display comprising a light modulator configured to display a portion of an image such as a reflective light modulator, a light emitter configured to display the portion of the image and a circuit configured to selectively provide signals to at least one of the light modulator and the light emitter indicative of the portion of the image. In one such embodiment, an active matrix provides a simple, efficient drive for such devices. Other embodiments methods of making and driving such devices.
Claims39
A display, comprising:
- a reflective display element configured to display a portion of an image;
- an emissive display element configured to display the portion of the image;
- and
- a circuit configured to selectively provide signals indicative of the portion of the image to at least one of the reflective display element and the emissive display element.
A display, comprising:
- at least one reflective display element configured to display a pixel of an image;
- at least one emissive display element configured to display the pixel, wherein each of the reflective display element and the emissive display element are configured to display the pixel based on ambient lighting conditions.
A device for outputting light, the device comprising:
- a first display element configured to output light based on a voltage difference applied to the first display element;
- a second display element configured to output light based on a current applied to the second display element;
- and
- a circuit configured to supply the current to the second display element and to supply the voltage difference to the first display element based on a first voltage level indicative of a portion of an image, wherein the circuit is further configured to selectively supply the current based on a second voltage level.
A device for outputting light, the device comprising:
- means for outputting light based on a voltage difference applied to the first display element;
- means for outputting light based on a current applied to the second display element;
- means for supplying the current to the second display element and for supplying the voltage difference to the first display element based on a first voltage level indicative of a portion of an image, wherein the supplying means is configured to selectively supply the current based on a second voltage level.
A method of operating a display, the method comprising:
- applying a voltage difference across a first display element based on a first voltage level indicative of a portion of an image;
- and
- selectively applying a current across a second display element based at least partly on the first voltage level and based at least partly on a second voltage level,
- wherein the voltage difference is applied so that the first display element substantially absorbs incident light when the current is below a specified level and reflects light when the current exceeds the specified level.
Dependencies are inferred from the claim text.