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AssigneeShenzhen China Star Optpelectronics Technology Co., Ltd.
InventorsXiaoping Tan, Yong Zhang
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The present invention relates to a method and apparatus for generating gray scale adjustment voltages and a panel driver circuit using the same. With the method provided in the invention, said apparatus for generating gray scale adjustment voltages generates a plurality of gray-scale reference voltage groups at a given time interval T0, and provides them for, such as a data driver circuit for adjusting gray scale of pictures by means of the reference gray-scale voltages, wherein values of the gray-scale reference voltages in each gray-scale reference voltage group are different from one another, and the time interval T0 need to be less or equal to a quotient from the displaying time in each frame divided by the product of the number of pixels in the vertical direction of a display screen and the number of gray-scale reference voltage groups. The present invention can improve the rate for outputting the gray scale voltages by said gray scale adjustment voltages generation apparatus without modifying the original data driver circuit in the liquid crystal display, such that a displaying effect of higher-order is obtained and improvement in picture quality is accomplished. The present invention may be widely used in various image display devices.
A method for generating gray scale adjustment voltage, including the step of generating k gray-scale reference voltage groups at a given time interval T0, wherein k≧2, and gray-scale reference voltage values in the gray-scale reference voltage groups are different from one another.
A gray scale adjustment voltage generation device, comprising a programmable gamma module, wherein the programmable gamma module includes memories with the number at least equal to that number of the generated gray-scale reference voltage groups, and each memory is configured to store data for generating one group of gray-scale reference voltages, and
A panel driver circuit, comprising a gray scale adjustment voltage generation device and a data driver circuit for receiving voltages output by the gray scale adjustment voltage generation device, wherein the gray scale adjustment voltage generation device includes a programmable gamma module, the programmable gamma module includes memories with the number at least equal to that number of the generated gray-scale reference voltage groups, and each memory is configured to store data for generating one group of gray-scale reference voltages, and wherein the programmable gamma module generates the groups of gray-scale reference voltages by a method including the step of generating k gray-scale reference voltage groups at a given time interval T0, wherein k≧2, and gray-scale reference voltage values in the gray-scale reference voltage groups are different from one another.
Dependencies are inferred from the claim text.