Display system having electrode modulation to alter a state of an electro-optic layer
First Claim
1. A method for operating a display system, said display system comprising a first substrate having a plurality of pixel electrodes, an electro-optic layer operatively coupled to said pixel electrodes and an electrode operatively coupled to said electro-optic layer, said method comprising:
- applying a first plurality of pixel data values to said plurality of pixel electrodes such that a first pixel data represented by said first plurality of pixel data values is displayed;
applying a first control voltage to said electrode to alter a state of said electro-optic layer such that said first pixel data is substantially not displayed;
applying a second plurality of pixel data values to said plurality of pixel electrodes, said second plurality of pixel data values representing a second pixel data which is displayed next in sequence after said first pixel data is substantially not displayed;
after applying said second plurality of pixel data values, applying a second control voltage to said electrode, after applying said first control voltage, to alter said state of said electro-optic layer such that said second pixel data is displayed, and wherein said first control voltage is one of a high extreme and a low extreme and wherein said second control voltage is one of a high view extreme or a low view extreme and wherein when a maximum voltage across said electro-optic layer is desired for a frame or a subframe, a pixel electrode voltage, corresponding to one of said second plurality of pixel data values, is one of a high pixel extreme voltage or a low pixel extreme voltage, and wherein a voltage signal applied to said electrode in transitioning from said first control voltage to said second control voltage does not cross a voltage level defined substantially by a midpoint between said high pixel extreme voltage and said low pixel extreme voltage.
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Abstract
Methods and systems for operating a display system. An example of the display system includes a first substrate having a plurality of pixel electrodes, an electro-optic layer operatively coupled to the pixel electrodes and an electrode operatively coupled to said electro-optic layer. In one example of a method of the invention, a first plurality of pixel data values is applied to the plurality of pixel electrodes. A first control voltage is applied to the electrode to alter a state of the electro-optic layer such that the first pixel data represented by the first plurality of pixel data values is substantially not displayed. A second plurality of pixel data values, representing a second pixel data, is applied to the plurality of pixel electrodes, and a second control voltage is applied to the electrode to alter the state of the electro-optic layer such that the second pixel data is displayed. In an example of a first aspect of the invention, a voltage difference between the first control voltage and the second control voltage is reduced to reduce capacitive shifting of the second plurality of pixel data values on the plurality of pixel electrodes. In an example of a second aspect of the invention, at least one of the first control voltage, the second control voltage and a pixel data value of the second plurality of pixel data values is determined by an illumination color used in displaying said second pixel data. In an example of a third aspect of the invention, the electrode receives a composite signal over time, and a first parameter of at least one of the first control voltage and the second control voltage is selected to provide an offset, for a portion of the composite signal, from a DC balanced signal over time with respect to a particular voltage.
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Citations
22 Claims
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1. A method for operating a display system, said display system comprising a first substrate having a plurality of pixel electrodes, an electro-optic layer operatively coupled to said pixel electrodes and an electrode operatively coupled to said electro-optic layer, said method comprising:
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applying a first plurality of pixel data values to said plurality of pixel electrodes such that a first pixel data represented by said first plurality of pixel data values is displayed;
applying a first control voltage to said electrode to alter a state of said electro-optic layer such that said first pixel data is substantially not displayed;
applying a second plurality of pixel data values to said plurality of pixel electrodes, said second plurality of pixel data values representing a second pixel data which is displayed next in sequence after said first pixel data is substantially not displayed;
after applying said second plurality of pixel data values, applying a second control voltage to said electrode, after applying said first control voltage, to alter said state of said electro-optic layer such that said second pixel data is displayed, and wherein said first control voltage is one of a high extreme and a low extreme and wherein said second control voltage is one of a high view extreme or a low view extreme and wherein when a maximum voltage across said electro-optic layer is desired for a frame or a subframe, a pixel electrode voltage, corresponding to one of said second plurality of pixel data values, is one of a high pixel extreme voltage or a low pixel extreme voltage, and wherein a voltage signal applied to said electrode in transitioning from said first control voltage to said second control voltage does not cross a voltage level defined substantially by a midpoint between said high pixel extreme voltage and said low pixel extreme voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification