Semiconductor device and method of driving semiconductor device
First Claim
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1. A method of driving a semiconductor display device, the semiconductor display device comprising:
- an opposing electrode;
a plurality of pixels, each of which comprises;
a pixel TFT;
a pixel electrode; and
a liquid crystal formed between the pixel electrode and the opposing electrode; and
a plurality of source signal lines and a plurality of gate signal lines, each of which is electrically connected to at least one of the pixel TFTs,the method comprising the steps of;
inputting display signals to the pixel electrodes of the pixels through the pixel TFTs; and
displaying an image corresponding to the display signals during a frame period,wherein each of the display signals has one of a positive polarity and a negative polarity relative to an electric potential of the opposing electrode in accordance with a polarity pattern;
wherein the polarity pattern is maintained during the frame period, and irregularly changed to another polarity pattern after the frame period;
wherein the display signals having a same polarity are input to the pixel electrodes through the pixel TFTs connected to one of the plurality of source signal lines;
wherein polarities of the display signals are independently controlled in each of the plurality of source signal lines; and
wherein polarities of the display signals input to the pixel electrodes through the pixel TFTs connected to one of the plurality of source signal lines are changed together.
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Abstract
A semiconductor display device with which flicker, vertical striping, and horizontal striping are not easily seen, and a method of driving the semiconductor display device, are provided. Display signals inputted to a plurality of pixel electrodes have a positive or negative polarity based on the electric potential of an opposing electrode, and pixel electrodes to which display signals having a positive polarity are inputted, and pixel electrodes to which display signals having a negative polarity are inputted, differ for each frame period with the method of driving the semiconductor display device.
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Citations
6 Claims
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1. A method of driving a semiconductor display device, the semiconductor display device comprising:
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an opposing electrode; a plurality of pixels, each of which comprises; a pixel TFT; a pixel electrode; and a liquid crystal formed between the pixel electrode and the opposing electrode; and a plurality of source signal lines and a plurality of gate signal lines, each of which is electrically connected to at least one of the pixel TFTs, the method comprising the steps of; inputting display signals to the pixel electrodes of the pixels through the pixel TFTs; and displaying an image corresponding to the display signals during a frame period, wherein each of the display signals has one of a positive polarity and a negative polarity relative to an electric potential of the opposing electrode in accordance with a polarity pattern; wherein the polarity pattern is maintained during the frame period, and irregularly changed to another polarity pattern after the frame period; wherein the display signals having a same polarity are input to the pixel electrodes through the pixel TFTs connected to one of the plurality of source signal lines; wherein polarities of the display signals are independently controlled in each of the plurality of source signal lines; and wherein polarities of the display signals input to the pixel electrodes through the pixel TFTs connected to one of the plurality of source signal lines are changed together. - View Dependent Claims (2)
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3. A method of driving a semiconductor display device, the semiconductor display device comprising:
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an opposing electrode; a plurality of pixels, each of which comprises; a pixel TFT; a pixel electrode; and a liquid crystal formed between the pixel electrode and the opposing electrode; and a plurality of source signal lines and a plurality of gate signal lines, each of which is electrically connected to at least one of the pixel TFTs, the method comprising the steps of; inputting display signals to the pixel electrodes of the pixels through the pixel TFTs; and displaying an image corresponding to the display signals during a frame period, wherein each of the display signals has one of a positive polarity and a negative polarity relative to an electric potential of the opposing electrode in accordance with a polarity pattern; wherein the polarity pattern is maintained during the frame period, and irregularly changed to another polarity pattern after the frame period; wherein the display signals having a same polarity are input to the pixel electrodes through the pixel TFTs connected to one of the plurality of gate signal lines; wherein polarities of the display signals are independently controlled in each of the plurality of gate signal lines; and wherein polarities of the display signals input to the pixel electrodes through the pixel TFTs connected to one of the plurality of gate signal lines are changed together. - View Dependent Claims (4)
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5. A semiconductor display device comprising:
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a source signal line driver circuit; a gate signal line driver circuit; a plurality of source signal lines; a plurality of gate signal lines; a pixel portion; and a display signal generation portion, wherein the pixel portion has a plurality of pixels, each containing a pixel TFT and a pixel electrode; wherein the display signal generation portion comprises a control portion, a polarity data signal generation portion, an alternating current signal generation portion, a display signal selection portion, a + side display signal generation portion, and a −
side display signal generation portion,wherein display signals are generated in the display signal generating portion and input to the plurality of source signal lines through the source signal line driver circuit; wherein an image corresponding to the display signals is displayed during a frame period; wherein a polarity pattern corresponding to the display signals is maintained during the frame period, and irregularly changed to another polarity pattern after the frame period; wherein the display signals having a same polarity are input to the pixel electrodes through the pixel TFTs connected to one of the plurality of gate signal lines; wherein polarities of the display signals are independently controlled in each of the plurality of gate signal lines; and wherein polarities of the display signals input to the pixel electrodes through the pixel TFTs connected to one of the plurality of gate signal lines are changed together. - View Dependent Claims (6)
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Specification