Liquid crystal display device
AssigneeHitachi, Ltd.
InventorsYasuyuki Kudo, Tsutomu Furuhashi, Yoshiro Mikami, Shinichi Komura, Toshio Miyazawa
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Abstract
A liquid crystal display device includes a liquid crystal panel having a plurality of pixels disposed in a matrix format, a Y-selecting signal generating unit for selecting one or more pixel rows, an X-selecting signal generating unit for selecting one or more pixel columns, and a tone signal generating unit for generating a tone signal for applying the corresponding tone voltage to tone information of said display data onto each of the pixels.
Claims16
A liquid crystal display device for displaying data, comprising:
- a liquid crystal panel having a plurality of pixels located in a matrix format;
- a Y-selecting signal generating unit for selecting pixel rows of said plurality of pixels;
- an X-selecting signal generating unit for selecting pixel columns of said plurality of pixels;
- and
- a tone signal generating unit for generating a tone signal for applying a tone voltage corresponding to tone information of said display data onto each of said plurality of pixels.
A method for displaying data on a liquid crystal panel, comprising the steps of:
- generating the corresponding tone signal to the tone information of said display data, for each of a plurality of pixels disposed on said liquid crystal panel;
- applying the corresponding tone voltage to said tone signal onto one or more pixels selected by at least one of a Y-selecting signal for selecting one or more pixel rows and an X-selecting signal for selecting one or more pixel columns.
A liquid crystal display device for displaying data, comprising:
- a liquid crystal panel having a pair of substrates at least one of which is transparent, a liquid crystal layer formed between a pair of substrates, and a plurality of pixels;
- a Y-selecting signal generating unit for selecting one or more pixel rows of said plurality of pixels;
- an X-selecting signal generating unit for selecting one or more pixel columns of said plurality of pixels;
- a tone signal generating unit for generating a tone signal corresponding to the tone information of said display data and outputting said tone signal to each of said plurality of pixels;
- a memory circuit for starting to hold the tone signal from said tone signal generating unit if the Y-selecting signal from said Y-selecting signal generating unit and the X-selecting signal from said X-selecting signal generating unit are changed from the non-selecting state to the selecting state;
- a pulse width converting circuit for modulating the tone signal from said memory circuit in time and generating a binary pulse width signal;
- a switch circuit for switching an ac signal with a center voltage signal according to the level of said binary pulse width signal;
- and
- a pixel electrode being connected to said switch circuit.
A method for displaying data on a liquid crystal panel, comprising the steps of:
- generating the corresponding tone signal to tone information of said display data, for each of a plurality of pixels disposed on said liquid crystal panel;
- holding said tone signal in a memory provided for each of said plurality of pixels if any pixel located on said liquid crystal panel is changed from a non-selecting state into a selecting state;
- modulating the tone signal from said memory circuit in time, for generating a binary pulse width signal;
- and
- switching an ac signal with a center voltage signal according to the level of said binary pulse width signal and then outputting said signal to a pixel electrode.
A liquid crystal display device for displaying data, comprising:
- a liquid crystal panel having a plurality of pixels disposed in a matrix format;
- a holding circuit provided for each of said plurality of pixels and for holding the corresponding tone voltage to tone information of said display data;
- a refreshing circuit for refreshing a tone voltage held in said holding circuit;
- and
- a rewriting circuit for rewriting the tone voltage held in said holding circuit according to said tone information.
A method for displaying data on a liquid crystal panel, comprising the steps of:
- holding the corresponding tone voltage to tone information of said display data in a holding circuit provided for each of a plurality of pixels disposed on said liquid crystal panel;
- and
- displaying said data by applying said held tone voltage onto each of said plurality of pixels and selecting the refresh of said holding circuit or the rewrite of said holding circuit according to said tone information.
A liquid crystal display device for displaying data, comprising:
- a liquid crystal panel having a plurality of pixels disposed in a matrix format;
- a Y-selecting signal generating unit for selecting one or more pixel rows of said plurality of pixels;
- and
- a tone signal generating unit for generating the corresponding tone signal to tone information of said display data, for a pixel specified by a Y-selecting signal from said Y-selecting signal generating unit, and outputting said tone signal to said specified pixel.
Dependencies are inferred from the claim text.