Central symmetric gamma voltage correction circuit
AssigneeIndustrial Technology Research Institute
InventorsMing-Daw Chen, Yuhren Shen
Life of this patent
Estimating the term…
Abstract
A central symmetric Gamma voltage correction circuit is mainly applied to the displaying circuit of liquid-crystal display. By installing a resistor voltage dividing circuit and a driving circuit so that a well adjustment way to the Gamma correction voltage can be acquired. Moreover, the value of the Gamma correction voltage is controlled by externally inputting voltage, and thus the number of external correction reference voltage input externally and the number of the amplifiers are reduced. The resistor voltage dividing circuit and driving circuit are formed by a plurality of resistors, adjustable resistors and amplifiers so as to achieve the object of reducing the number of externally inputting correction voltages and the number of amplifiers.
Claims8
A central symmetric Gamma voltage correction circuit comprising:
- a driving circuit with one of the following two pluralities:
- plural amplifiers and plural buffers;
- the driving circuit receiving externally and processing a plurality of reference voltages and the processing results thereof being connected to an external data driver;
- the data driver serving to receive an output of the Gamma voltage correction voltage and then converting the output into a plurality of voltage sets;
- characteristic in that:
- the Gamma voltage correction circuit further comprises a voltage dividing circuit;
- the voltage dividing circuit is formed by a plurality of voltage dividing sub-circuits;
- each voltage dividing sub-circuit is formed by a plurality of resistor elements;
- wherein the plurality of resistor elements contains at least one adjustable resistor element;
- by adjusting the adjustable resistor element, two ends thereof are output with a respective output;
- and the acquired output result is connected to an input of the data driver.
A central symmetric Gamma voltage correction circuit comprising:
- a driving circuit with one of the following two pluralities:
- plural amplifiers and plural buffers;
- the driving circuit receiving externally and processing a plurality of reference voltages and processed results being output;
- a voltage dividing circuit being formed by a plurality of voltage dividing sub-circuits;
- each voltage dividing sub-circuit being formed by a plurality of resistor elements;
- wherein the plurality of resistor elements contains at least one adjustable resistor element;
- and by adjusting the adjustable resistor element;
- two ends thereof are output with a respective output;
- wherein outputs of the driving circuit and outputs of the voltage dividing circuit are as plural inputs of an external data driver;
- the data driver receives outputs of the Gamma voltage correction voltage, then converts receiving data into a plurality of voltages and then outputs them.
Dependencies are inferred from the claim text.