Liquid crystal display having gray voltages with varying magnitudes and driving method thereof
First Claim
1. A liquid crystal display comprising:
- a reference voltage generator changing level of a first predetermined voltage based on a first signal to generate a reference voltage, the first signal varying depending on one of brightness of surroundings of the liquid crystal display, brightness of on-screen images of the liquid crystal display, and a user'"'"'s manipulation; and
a gray voltage generator generating a plurality of gray voltages with magnitudes depending on a magnitude of the reference voltage and a second predetermined voltage.
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Accused Products
Abstract
A liquid crystal display (“LCD”) having a plurality of gray voltages with varying magnitudes and a driving method thereof. An LCD includes a reference voltage generator changing level of a supply voltage based on a first signal to generate a reference voltage. The first signal varies depending on the surrounding brightness of the LCD, the brightness of the on-screen images of the LCD, and user'"'"'s manipulation. The LCD also includes a gray voltage generator generating a plurality of gray voltages with magnitudes varying dependent on the magnitude of the reference voltage and a predetermined voltage such as a ground voltage. The LCD further includes a plurality of gate lines transmitting a plurality of gate signals, a plurality of data lines transmitting the gray voltages, and a plurality of pixels. Each pixel has a switching element connected to one of the gate lines and one of the data lines and transmitting the gray voltages to the pixels under the control of the gate signal. The LCD includes a gate driver supplying the gate signals to the gate lines and a data driver selecting the gray voltages based on gray data from an external source to supply to the pixels via the data lines.
47 Citations
26 Claims
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1. A liquid crystal display comprising:
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a reference voltage generator changing level of a first predetermined voltage based on a first signal to generate a reference voltage, the first signal varying depending on one of brightness of surroundings of the liquid crystal display, brightness of on-screen images of the liquid crystal display, and a user'"'"'s manipulation; and
a gray voltage generator generating a plurality of gray voltages with magnitudes depending on a magnitude of the reference voltage and a second predetermined 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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23. A method of driving a liquid crystal display having a plurality of gate lines, a plurality of data lines, and a plurality of pixels including switching elements connected to the gate lines and the data lines, the method comprising:
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sensing brightness level of surroundings of the liquid crystal display to generate a first signal;
changing a predetermined voltage to generate a second signal on the basis of the first signal;
generating a plurality of gray voltages with magnitudes varying dependent on the second signal;
providing scan signals for the gate lines to turn on the switching elements; and
converting gray data from an external source into corresponding gray voltages to providing the corresponding gray voltages to the pixels via the data lines and the switching elements.
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24. A method of driving a liquid crystal display having a plurality of gate lines, a plurality of data lines, and a plurality of pixels including switching elements connected to the gate lines and the data lines, the method comprising:
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determining brightness level of on-screen images of the liquid crystal display based on gray data from an external source to generate a first signal;
changing level of a predetermined voltage to generate a second signal on the basis of the first signal;
generating a plurality of gray voltages with values varying depending on the second signal;
providing scan signals for the gate lines to turn on the switching elements; and
converting the gray data into corresponding gray voltages to providing the corresponding gray voltages to the pixels via the data lines and the switching elements. - View Dependent Claims (25, 26)
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Specification