Panel controller, liquid crystal display apparatus, signal modulation method, signal modulation program, and recording medium
AssigneeSharp Kabushiki Kaisha
InventorMasahiro Arai
Life of this patent
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Abstract
The object of the invention is to prevent a large amount of unnecessary images from being displayed on an image on a liquid crystal display panel, due to a signal value of a pulse width modulation signal (PWM) which exceeds the minimum signal value of a vertical synchronization signal when the vertical synchronization signal (VS) interferes with the pulse width modulation signal (PWM) within a period of one frame. A liquid crystal display panel controller makes an intermediate signal value (M1) of the vertical synchronization signal (VS) higher than the maximum signal value (H2) of the pulse width modulation signal (PWM) within at least a part of the period of one frame for the vertical synchronization signal.
Claims5
A panel controller that controls a liquid crystal display panel which receives light from an illumination apparatus that is driven in accordance with a dimming signal, the panel controller makes an intermediate signal value, which is an intermediate value between a maximum signal value and a minimum signal value of a vertical synchronization signal, higher than a maximum signal value of the dimming signal during at least a partial period of one frame period of the vertical synchronization signal.
A signal modulation method for a panel controller that controls a liquid crystal display panel which receives light from an illumination apparatus that is driven in accordance with a dimming signal, the signal modulation method makes an intermediate signal value, which is an intermediate value between a maximum signal value and a minimum signal value of a vertical synchronization signal, higher than a maximum signal value of the dimming signal during at least a partial period of one frame period of the vertical synchronization signal.
A signal modulation program for a panel controller that controls a liquid crystal display panel which receives light from an illumination apparatus that is driven in accordance with a dimming signal, the signal modulation program forces the panel controller to execute signal modulation that makes an intermediate signal value, which is an intermediate value between a maximum signal value and a minimum signal value of a vertical synchronization signal, higher than a maximum signal value of the dimming signal during at least a partial period of one frame period of the vertical synchronization signal.
Dependencies are inferred from the claim text.