Liquid crystal display
AssigneeCitizen Watch Co., Ltd.
InventorShinya Kondoh
Life of this patent
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Abstract
In a liquid crystal display using a liquid crystal exhibiting a smectic phase, a display of good quality is accomplished by alleviating the burn-in phenomenon caused by its layer structure or by an internal electric field induced by spontaneous polarization. To achieve this, the liquid crystal display is equipped with a display data conversion circuit which forcibly sets an arbitrary pixel into a prescribed display state for a prescribed period regardless of the display data to be written to the pixel, thereby correcting the change of its layer structure and preventing the internal electric field due to the spontaneous polarization occurring in the same direction from lasting for too long a period.
Claims12
A liquid crystal display containing a plurality of pixels arranged in a matrix pattern and having, between a pair of substrates, a liquid crystal exhibiting a smectic phase, comprising:
- a circuit for generating display data to write to said pixels;
- a circuit for receiving said display data from said display data generating circuit, and for generating a scanning voltage and a signal voltage to be applied to said pixels;
- and
- a display data conversion circuit for converting said display data in order to forcibly set random pixels of the plurality of pixels in a prescribed display state for a prescribed period regardless of said display data, the random pixels being distributed throughout the matrix pattern.
A liquid crystal display containing a plurality of pixels arranged in a matrix pattern and having, between a pair of substrates, a liquid crystal exhibiting a smectic phase, said substrates having a plurality of scanning electrodes and signal electrodes, respectively, said liquid crystal display comprising:
- a display data generating circuit for generating display data to write to said pixels;
- a scanning voltage generating circuit for generating, based on said display data from said display data generating circuit, a scanning voltage to be applied to said scanning electrodes;
- a signal voltage generating circuit for generating, based on said display data from said display data generating circuit, a signal voltage to be applied to said signal electrodes;
- and
- a display data conversion circuit for converting said display data in order to forcibly set random pixels of the plurality of pixels in a prescribed display state for a prescribed period regardless of said display data, the random pixels being distributed throughout the matrix pattern.
Dependencies are inferred from the claim text.