Charge pump for producing display driver output
First Claim
1. A display driver circuit configured to drive a display array with a waveform having a plurality of voltages, wherein a first subset of the plurality of voltages is different from a second subset of the plurality of voltages by a defined amount, the display driver circuit comprising:
- power supply circuitry configured to generate the first subset of the plurality of voltages; and
a charge pump having the first subset of the plurality of voltages as inputs and the second subset of the plurality of voltages as outputs on a plurality of overdrive lines and including a separate boost capacitor for each of the second subset of the plurality of voltages on the plurality of overdrive lines;
wherein each of the plurality of overdrive lines is directly connected to its corresponding boost capacitor.
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Accused Products
Abstract
This disclosure provides systems, methods and apparatus for driving a display array with a waveform having a plurality of voltage levels, wherein a first subset of the plurality of voltages is different from a second subset of the plurality of voltages by a defined amount. In one aspect, a display driver circuit comprises a power supply configured to generate the first subset of said plurality of voltages, and a charge pump having the first subset of the plurality of voltages as inputs and the second subset of the plurality of voltages as outputs. The charge pump may not include a switch between each output voltage and a corresponding capacitor.
33 Citations
20 Claims
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1. A display driver circuit configured to drive a display array with a waveform having a plurality of voltages, wherein a first subset of the plurality of voltages is different from a second subset of the plurality of voltages by a defined amount, the display driver circuit comprising:
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power supply circuitry configured to generate the first subset of the plurality of voltages; and a charge pump having the first subset of the plurality of voltages as inputs and the second subset of the plurality of voltages as outputs on a plurality of overdrive lines and including a separate boost capacitor for each of the second subset of the plurality of voltages on the plurality of overdrive lines; wherein each of the plurality of overdrive lines is directly connected to its corresponding boost capacitor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of driving a display array with a waveform having a plurality of voltages, wherein a first subset of the plurality of voltages is different from a second subset of the plurality of voltages by a defined amount, the method comprising:
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generating the first subset of the plurality of voltages, and generating the second subset of the plurality of voltages using a charge pump with switching circuits implemented on a first integrated circuit, the charge pump including a plurality of boost capacitors and having the first subset of plurality of voltages as inputs and the second subset of the plurality of voltages as outputs on a plurality of overdrive lines; and directly routing voltage on output terminals of the boost capacitors to the plurality of overdrive lines without passing through a switch on the first integrated circuit. - View Dependent Claims (12, 13, 14)
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15. A display driver circuit configured to drive a display array with a waveform having a plurality of voltages, wherein a first subset of the plurality of voltages is different from a second subset of the plurality of voltages by a defined amount, the display driver circuit comprising:
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means for generating the first subset of the plurality of voltages, and means for generating the second subset of the plurality of voltages using a charge pump having the first subset of the plurality of voltages as inputs and the second subset of the plurality of voltages as outputs on a plurality of overdrive lines, and including a separate boost capacitor for each of the second subset of the plurality of voltage on the plurality of overdrive lines, and wherein each of the plurality of overdrive lines is directly connected to its corresponding boost capacitor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification