JP2003058118A5

JP2003058118A5 -

Info

Publication number: JP2003058118A5
Application number: JP2001242619A
Authority: JP
Filing date: 2001-08-09
Publication date: 2005-03-03

Description

【発明の名称】液晶パネルのプリチャージ駆動方法、および電子機器並びにプロジェクタ Patent application title: Method of driving precharge of liquid crystal panel, electronic device and projector

【０００１】
【発明の属する技術分野】
本発明は、例えば、プロジェクタなどに用いて好適な液晶パネルのプリチャージ駆動方法、および電子機器並びにプロジェクタに関する。[0001]
Field of the Invention
The present invention relates to a liquid crystal panel precharge drive method suitable for use in, for example, a projector, an electronic device , and a projector .

【００１３】
さらに、上述した電子機器は、前記各液晶パネルは、ＲＧＢ各色に対応するものであり、光を照射する光源と、前記光源から光を前記各液晶パネルに導き、前記各液晶パネルを透過した光を合成して外部に照射する光学機構とを備えることが好ましい。さらに、本発明のプロジェクタは、複数の走査線と、複数のデータ線と、プリチャージ信号線と、前記各走査線と前記各データ線に接続された複数の第１トランジスタと、前記各第１トランジスタに接続された複数の画素電極と、前記各データ線と前記各プリチャージ信号線とに接続された複数の第２トランジスタとを各々有する複数の液晶パネルと、前記各液晶パネルのプリチャージ信号線にプリチャージ電圧を各々給電するとともに、少なくとも１枚の液晶パネルに、他の液晶パネルに印加するプリチャージ電圧の極性と逆極性のプリチャージ電圧を給電するプリチャージ回路とを備え、前記各液晶パネルはＲＧＢ各色に対応するものであり、光を照射する光源と、前記光源から光を前記各液晶パネルに導き、前記各液晶パネルを透過した光を合成して外部に照射する光学機構とを備えたことを特徴とする。 [0013]
Furthermore, in the electronic device described above, each liquid crystal panel corresponds to each color of RGB, and a light source for emitting light, and light from the light source is guided to each liquid crystal panel, and light transmitted through each liquid crystal panel It is preferable to provide the optical mechanism which synthesize | combines and is irradiated to the exterior. Furthermore, in the projector according to the present invention, a plurality of scanning lines, a plurality of data lines, a precharge signal line, a plurality of first transistors connected to the respective scanning lines and the respective data lines, and the respective first A plurality of liquid crystal panels each having a plurality of pixel electrodes connected to transistors, a plurality of second transistors connected to the data lines and the precharge signal lines, and a precharge signal of the liquid crystal panels A line for supplying a precharge voltage, and at least one liquid crystal panel comprising a precharge circuit for supplying a precharge voltage having a polarity opposite to that of the precharge voltage applied to the other liquid crystal panel; The liquid crystal panel corresponds to each color of RGB, and a light source for emitting light and light from the light source are guided to the respective liquid crystal panels and transmitted through the respective liquid crystal panels Characterized by comprising an optical system for irradiating the outside by combining the light.

Claims

In a precharge driving method of a liquid crystal panel used for an electronic device provided with a plurality of liquid crystal panels,
The liquid crystal panels are driven by applying a precharging voltage, and at least one liquid crystal panel is supplied with a precharging voltage of the opposite polarity to the polarity of the precharging voltage applied to the other liquid crystal panels. Driving method of the liquid crystal panel.

A plurality of scanning lines, a plurality of data lines, a precharge signal line, a plurality of first transistors connected to the scanning lines and the data lines, and a plurality of pixels connected to the first transistors A plurality of liquid crystal panels each having an electrode, and a plurality of second transistors connected to the data lines and the precharge signal line;
A precharge voltage is supplied to the precharge signal lines of the liquid crystal panels, and a precharge voltage of a polarity opposite to that of the precharge voltage applied to the other liquid crystal panels is supplied to at least one liquid crystal panel An electronic device comprising: a charge circuit.

The liquid crystal panel includes control lines respectively connected to control terminals of the plurality of second transistors,
The precharge circuit is characterized in that a precharge control signal for turning on each of the second transistors is supplied to the control line of each liquid crystal panel during a whole or a part of a horizontal flyback period. The electronic device according to claim 2.

The power supply circuit includes a power supply circuit that generates a positive precharge voltage that is high with respect to a reference potential and a negative precharge voltage that is high with respect to the reference potential, and the precharge circuit corresponds to each liquid crystal panel. The electronic device according to claim 2, wherein each of the plurality of electronic devices is provided to generate the precharge voltage by selecting the positive precharge voltage and the negative precharge voltage.

Each liquid crystal panel corresponds to each color of RGB,
A light source for emitting light,
3. The electronic device according to claim 2, further comprising: an optical mechanism that guides light from the light source to the liquid crystal panels, combines the light transmitted through the liquid crystal panels, and emits the combined light.

A plurality of scanning lines, a plurality of data lines, a precharge signal line, a plurality of first transistors connected to the scanning lines and the data lines, and a plurality of pixels connected to the first transistors A plurality of liquid crystal panels each having an electrode, and a plurality of second transistors connected to the data lines and the precharge signal line;
A precharge voltage is supplied to the precharge signal lines of the liquid crystal panels, and a precharge voltage of the opposite polarity to the polarity of the precharge voltage applied to the other liquid crystal panels is supplied to at least one liquid crystal panel. Equipped with a charge circuit,
Each liquid crystal panel corresponds to each color of RGB,
A light source for emitting light,
An optical mechanism for guiding light from the light source to each of the liquid crystal panels, combining the light transmitted through each of the liquid crystal panels, and irradiating the combined light
A projector characterized by comprising.