LCOS column memory effect reduction
First Claim
1. A method for reducing the effect of column memory in a video imager, comprising the steps of:
- activating one of a plurality of row electrodes;
selectively applying a video input signal to a plurality of column electrodes;
setting at least one of the plurality of column electrodes to a substantially constant voltage prior to activating a subsequent row electrode;
wherein said step of setting at least one of the plurality of column electrodes to a substantially constant voltage further comprises the steps of;
writing the video input signal to a memory;
activating the subsequent row electrode once the plurality of column electrodes are set to the substantially constant voltage;
selectively applying the video input signal from the memory to the plurality of column electrodes; and
wherein said step of setting at least one of the plurality of column electrodes to a substantially constant voltage further comprises the step of activating a subsequent row electrode associated with a hidden display line such that a substantially constant brightness associated with the substantially constant voltage can be displayed on the hidden display line.
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Accused Products
Abstract
The invention concerns a method for reducing the effect of column memory. The method includes the steps of activating one of a plurality of row electrodes, selectively applying a video input signal to a plurality of column electrodes, and setting at least one of the plurality of column electrodes to a substantially constant voltage prior to activating a subsequent row electrode. In one arrangement, the substantially constant voltage can correlate to a flat field. The method can also include repeating the steps of activating one of the plurality of row electrodes step, selectively applying the video input signal step, and setting at least one of the plurality of column electrodes to the substantially constant voltage step in which the steps can be performed in a liquid crystal on silicon imager.
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Citations
32 Claims
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1. A method for reducing the effect of column memory in a video imager, comprising the steps of:
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activating one of a plurality of row electrodes; selectively applying a video input signal to a plurality of column electrodes; setting at least one of the plurality of column electrodes to a substantially constant voltage prior to activating a subsequent row electrode; wherein said step of setting at least one of the plurality of column electrodes to a substantially constant voltage further comprises the steps of; writing the video input signal to a memory; activating the subsequent row electrode once the plurality of column electrodes are set to the substantially constant voltage; selectively applying the video input signal from the memory to the plurality of column electrodes; and wherein said step of setting at least one of the plurality of column electrodes to a substantially constant voltage further comprises the step of activating a subsequent row electrode associated with a hidden display line such that a substantially constant brightness associated with the substantially constant voltage can be displayed on the hidden display line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for reducing the effect of column memory, comprising:
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a controller, wherein the controller is programmed to activate one of a plurality of row electrodes; a switch control to selectively apply a video input signal to a plurality of column electrodes; a circuit for setting at least one of the plurality of column electrodes to a substantially constant voltage prior to the controller activating a subsequent row electrode; wherein the structure further comprises; a memory for storing the video input signal; and a multiplexer, wherein the controller is further programmed to activate the subsequent row electrode once the plurality of column electrodes are set to the substantially constant voltage, wherein the multiplexer feeds the video input signal from the memory to the switch control for selective application of the video input signal to the plurality of column electrodes; and an imager having display lines, wherein at least a portion of the display lines are hidden display lines, wherein the controller is further programmed to activate a subsequent row electrode associated with one of the hidden display lines such that a substantially constant brightness associated with the substantially constant voltage can be displayed on the hidden display line. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for reducing the effect of column electrode memory in a video imager, comprising the steps of:
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activating one of a plurality of row electrodes; selectively applying a first video input signal through a plurality of column electrodes to a plurality of pixel electrodes arranged in a row; subsequent to the step of selectively applying the first video input signal, deactivating the one of said plurality of row electrodes; and subsequent to the deactivating step, setting at least one of the plurality of column electrodes to a substantially constant voltage prior to activating a subsequent one of said plurality of row electrodes; subsequent to the setting step, selectively applying a second video input signal through the plurality of column electrodes to the plurality of pixel electrodes arranged in a row; subsequent to the step of selectively applying a second video input signal, activating the subsequent one of said plurality of row electrodes. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for reducing the effect of column electrode memory, comprising:
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a controller, wherein the controller is programmed to activate or deactivate one of a plurality of row electrodes; a switch control to selectively apply a first video input signal through a plurality of column electrodes to a plurality of pixel electrodes arranged in a row; and a circuit for setting the plurality of column electrodes to a substantially constant voltage prior to the controller activating a subsequent one of said plurality of row electrodes, wherein the switch control is configured to selectively apply the second video input signal through the plurality of column electrodes prior to the controller activating the subsequent one of said plurality of row electrodes. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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Specification