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US 8,947,008 B2Granted
Driver circuit and related error detection circuit and method
AssigneeSilicon Touch Technology Inc.
InventorsYu-Chun Chuang, Ruei-Iun Pu
Life of this patent
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Abstract
A low output voltage driver circuit for a light-emitting device is provided according to exemplary embodiments of the present invention. Also, an offset voltage cancellation and/or level shifter is incorporated into the driver circuit to increase the accuracy of the driving current. In addition, an error detection circuit and method are employed in order to adaptively detect the minimum output voltage of the inventive driver circuit.
Claims8
A driver circuit for driving a light-emitting device, comprising:
- a current mirror, having a first transistor and a second transistor, each having a first end, a second end, and a control end, wherein the first transistor is configured to receive a reference current at the first end of the first transistor, the second transistor is configured to generate a driving current at the first end of the second transistor, and the first end of the second transistor is directly connected to the light-emitting device;
- and
- an amplifier, having a first input terminal, a second input terminal, and an output terminal, the first input terminal being coupled to the first end of the first transistor, the second input terminal being coupled to the first end of the second transistor, and the output terminal being coupled to the control ends of the first and second transistors.
Dependencies are inferred from the claim text.