Liquid crystal drive apparatus and gradation display method
AssigneesHunet Display Technology Inc., Yutaka Ozaki
InventorYutaka Ozaki
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Abstract
A voltage with a predetermined pattern is applied to liquid crystals to drive the liquid crystals during a unit drive period of the liquid crystals and an application pattern according to the gradation data is set taking into account a value obtained by integrating the amount of transmitted light of liquid crystals at various points in time when each application pattern is applied to the liquid crystals. This allows a fine gradation display even if the liquid crystals are driven by only ON/OFF of a maximum rated voltage. As a result, it is possible to drive the liquid crystals at high speed and produce a multi-gradation display.
Claims12
A liquid crystal drive apparatus, comprising:
- a liquid crystal that controls an amount of transmitted light in accordance with an applied voltage;
- a voltage application pattern setter that sets said applied voltage in a plurality of ON/OFF patterns having a same total application time in a unit light emission period of an LED;
- and
- a voltage supplier that supplies said applied voltage to said liquid crystal in one ON/OFF pattern of said plurality of ON/OFF patterns set in said voltage application pattern setter in accordance with a gradation,
- wherein said liquid crystal drive apparatus displays a plurality of gradations by selectively using one of said ON/OFF patterns having a same total application time and variably controlling the amount of transmitted light in said liquid crystal.
A method of controlling an amount of transmitted light of a liquid crystal in a liquid crystal drive apparatus, comprising:
- selecting one ON/OFF pattern from a plurality of ON/OFF patterns having a same total application time in a unit light emission period of an LED;
- and
- supplying a voltage to said liquid crystal in accordance with the selected ON/OFF pattern,
- wherein said liquid crystal drive apparatus displays a plurality of gradations by selectively using one of said ON/OFF patterns having a same total application time and variably controlling the amount of transmitted light in said liquid crystal.
Dependencies are inferred from the claim text.