Method for driving liquid crystal display panel and liquid crystal display device
First Claim
1. A method of driving, by a multi-line selection (MLS) drive method for simultaneously selecting a plurality of L scanning electrodes, a liquid crystal display panel in which one frame is constituted by L sub-frames, comprising the steps of:
- providing a gradation register for storing a gradation pattern for displaying an ON state and an OFF state at each gradation level so as to perform gradation display by a frame rate control (FRC) method, a gradation control circuit for performing a shift operation of the gradation pattern of the gradation register and a gradation selecting circuit disposed on each signal electrode so as to cause the gradation control circuit to perform a shift operation of the gradation pattern of the gradation register for each frame synchronously with a first synchronous signal, for each line synchronously with a second synchronous signal and for each sub-frame such that the gradation display is performed.
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Abstract
In order to provide, when a multi-line selection (MLS) drive method for simultaneously selecting a plurality of scanning electrodes is applied to a liquid crystal display panel, a frame rate control (FRC) gradation display method in which the number of gradations to be displayed is increased without increasing a frame rate and circuit scales, a gradation register for storing a gradation pattern for displaying an ON state and an OFF state at each gradation level, a gradation control circuit for performing a shift arithmetic operation of the gradation pattern and a gradation selecting circuit disposed on each signal electrode are provided so as to cause the gradation control circuit to perform a shift operation of the gradation pattern of the gradation register for each frame synchronously with a vertical synchronous signal, for each line synchronously with a horizontal synchronous signal and for each sub-frame such that the gradation display is performed.
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Citations
13 Claims
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1. A method of driving, by a multi-line selection (MLS) drive method for simultaneously selecting a plurality of L scanning electrodes, a liquid crystal display panel in which one frame is constituted by L sub-frames, comprising the steps of:
providing a gradation register for storing a gradation pattern for displaying an ON state and an OFF state at each gradation level so as to perform gradation display by a frame rate control (FRC) method, a gradation control circuit for performing a shift operation of the gradation pattern of the gradation register and a gradation selecting circuit disposed on each signal electrode so as to cause the gradation control circuit to perform a shift operation of the gradation pattern of the gradation register for each frame synchronously with a first synchronous signal, for each line synchronously with a second synchronous signal and for each sub-frame such that the gradation display is performed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A liquid crystal display device in which a plurality of L scanning electrodes are selected simultaneously and one frame is constituted by L sub-frames, comprising:
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a gradation register for storing a gradation pattern for displaying an ON state and an OFF state at each gradation level;
a gradation control circuit for performing a shift operation of the gradation pattern of the gradation register; and
a gradation selecting circuit which is provided on each signal electrode;
wherein the gradation control circuit performs a shift operation. of the gradation pattern of the gradation register for each frame synchronously with a first synchronous signal, for each line synchronously with a second synchronous signal and for each sub-frame. - View Dependent Claims (13)
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Specification