Display panel driver
First Claim
1. A display panel driver for driving a display panel in which capacitive light emitting cells serving as pixels are formed at intersections between a plurality of row electrodes serving as display lines and a plurality of column electrodes intersecting with said row electrodes in accordance with pixel data for the pixels based on an input video signal, the display panel driver comprising:
- a pixel data pulse generation circuit which generates pixel data pulses by connecting said column electrodes and a power source line in accordance with said pixel data to apply said pixel data pulses to said column electrodes;
a resonance pulse power circuit which generates a resonance pulse power source voltage to apply said resonance pulse power source voltage to said power source line, said resonance pulse power circuit changing the resonance amplitude of said resonance pulse power source voltage while keeping a maximum voltage of said resonance pulse power source voltage in accordance with a pattern of a pulse sequence of said pixel data pulses;
a power prediction circuit which determines a predicted power consumption of said resonance pulse power circuit based on said pixel data for one field; and
a power consumption control circuit which controls said pixel data pulse generation circuit so as to adjust the power consumption of said resonance pulse power circuit in accordance with said predicted power consumption.
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Accused Products
Abstract
It is an object of the present invention to provide a display panel driver with which power consumption can be reduced. The display panel driver includes a pixel data pulse generation circuit which generates pixel data pulses by connecting the column electrodes and a power source line in accordance with the pixel data to apply the pixel data pulses to the column electrodes, and a resonance pulse power circuit which generates a resonance pulse power source voltage to apply the resonance pulse power source voltage to the power source line, the resonance pulse power circuit changing the resonance amplitude of the resonance pulse power source voltage while keeping a maximum voltage of the resonance pulse power source voltage in accordance with a pattern of a pulse sequence of the pixel data pulses. A predicted power consumption of the resonance pulse power circuit is determined based on the pixel data for one field, and the pixel data pulse generation circuit is controlled so as to adjust the power consumption of the resonance pulse power circuit in accordance with the predicted power consumption.
49 Citations
10 Claims
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1. A display panel driver for driving a display panel in which capacitive light emitting cells serving as pixels are formed at intersections between a plurality of row electrodes serving as display lines and a plurality of column electrodes intersecting with said row electrodes in accordance with pixel data for the pixels based on an input video signal, the display panel driver comprising:
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a pixel data pulse generation circuit which generates pixel data pulses by connecting said column electrodes and a power source line in accordance with said pixel data to apply said pixel data pulses to said column electrodes;
a resonance pulse power circuit which generates a resonance pulse power source voltage to apply said resonance pulse power source voltage to said power source line, said resonance pulse power circuit changing the resonance amplitude of said resonance pulse power source voltage while keeping a maximum voltage of said resonance pulse power source voltage in accordance with a pattern of a pulse sequence of said pixel data pulses;
a power prediction circuit which determines a predicted power consumption of said resonance pulse power circuit based on said pixel data for one field; and
a power consumption control circuit which controls said pixel data pulse generation circuit so as to adjust the power consumption of said resonance pulse power circuit in accordance with said predicted power consumption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A display panel driver for driving a display panel in which capacitive light emitting cells serving as pixels are formed at intersections between a plurality of row electrodes serving as display lines and a plurality of column electrodes intersecting with said row electrodes in accordance with pixel data for the pixels based on an input video signal, the display panel driver comprising:
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a pixel data pulse generation circuit which generates pixel data pulses by connecting said column electrodes and a power source line in accordance with said pixel data to apply said pixel data pulses to said column electrodes;
a resonance pulse power circuit which generates a resonance pulse power source voltage to apply said resonance pulse power source voltage to said power source line, said resonance pulse power circuit changing the resonance amplitude of said resonance pulse power source voltage while keeping a maximum voltage of said resonance pulse power source voltage in accordance with a pattern of a pulse sequence of said pixel data pulses;
a power prediction circuit which determines a predicted power consumption of the resonance pulse power circuit based on said pixel data for one field; and
a power consumption control circuit which controls said pixel data pulse generation circuit so as to adjust the power consumption of said resonance pulse power circuit in accordance with said predicted power consumption;
wherein said pixel data pulse generation circuit is divided into a plurality of IC chips respectively corresponding to column electrode groups that are made of a predetermined number of column electrodes; and
wherein said IC chips are mounted on a plurality of flexible wiring boards that are respectively connected to said power source line and the column electrodes in said resonance pulse power circuit formed on the substrate of the display panel.
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Specification