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Liquid Crystal Display Device and Driving Circuit

  • US 20130271357A1
  • Filed: 04/18/2012
  • Published: 10/17/2013
  • Est. Priority Date: 04/16/2012
  • Status: Active Grant
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First Claim
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1. A liquid crystal display device, which comprises:

  • a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, wherein;

    the first substrate further comprises a plurality of pixel units arranged in a matrix form, a plurality of scan drivers, a plurality of data drivers, a plurality of first switch units and a plurality of second switch units, all arranged around peripheral of pixel unit matrix;

    wherein each of pixel units further comprises;

    a data line, arranged in row direction;

    a first scan line and a second scan line, arranged in column direction;

    pixel electrode, disposed in area surrounded by the scan lines and the data line; and

    a controlled switch;

    wherein the controlled switch is a first thin film transistor;

    in each row of the pixel units, gate terminal of the first thin film transistor of odd-column pixel unit is connected the first scan line, gate terminal of the first thin film transistor of even-column pixel unit is connected the second scan line, source terminal of the first thin film transistor is connected to the data line, and drain terminal of the first thin film transistor is connected to the pixel electrode;

    each of the first switch units and one of channels of scan drivers correspond to the first-column pixel unit and the second-column pixel unit; and

    each of the first switch units further comprises an input terminal, a first output terminal, a second output terminal and a third output terminal;

    the first output terminal of the first switch unit is electrically connected to the first scan line of the first-column pixel unit, the second output terminal of the first switch unit is electrically connected to the second scan line of the first-column pixel unit, and the third output terminal of the first switch unit is electrically connected to the first scan line or the second scan line of the second-column pixel unit for selectively outputting the scan signal from one of channels of scan driver to either odd-row or even-row pixel units of one of two columns of pixel units;

    each of the second switch units and one of channels of data driver correspond to two row of pixel units;

    each of the second switch units comprises an input terminal, a first output terminal, and a second output terminal;

    the input terminal of the second switch unit is electrically connected to one of channels of the data driver;

    the first output terminal of the second switch unit is electrically connected to the data line of the first-row pixel unit;

    the second output terminal of the second switch unit is electrically connected to the data line of adjacent even-row for selectively outputting data signal from one of channels of data driver to the odd-row or even-row pixel unit of two adjacent rows;

    wherein the first switch unit further comprises;

    a first select line, a second select line, a third select line, a fourth select line, a fifth select line, a sixth select line and a low voltage signal line, all arranged in row direction;

    a first driver, for outputting a voltage select signal to the first select line, the second select line, the third select line, the fourth select line, the fifth select line, and the sixth select line, and outputting a low voltage to the low voltage signal line;

    a first field effect transistor, with gate terminal of the first field effect transistor electrically connected to the first select line, source terminal of the first field effect transistor electrically connected to one of channels of the scan driver, and drain terminal of the first field effect transistor electrically connected to the first scan line of the first-column pixel unit;

    a second field effect transistor, with gate terminal of the second field effect transistor electrically connected to the second select line, source terminal of the first field effect transistor electrically connected to the said channel of the scan driver, and drain terminal of the second field effect transistor electrically connected to the second scan line of the first-column pixel unit;

    a third field effect transistor, with gate terminal of the third field effect transistor electrically connected to the third select line, source terminal of the third field effect transistor electrically connected to the said channel of the scan driver, and drain terminal of the third field effect transistor electrically connected to the first scan line or the second scan line of the second-column pixel unit;

    a fourth field effect transistor, with gate terminal of the fourth field effect transistor electrically connected to the fourth select line, source terminal of the fourth field effect transistor electrically connected to the low voltage signal line, and drain terminal of the fourth field effect transistor electrically connected to the first scan line scan line of the first-column pixel unit;

    a fifth field effect transistor, with gate terminal of the fifth field effect transistor electrically connected to the fifth select line, source terminal of the fifth field effect transistor electrically connected to the low voltage signal line, and drain terminal of the fifth field effect transistor electrically connected to the second scan line of the first-column pixel unit;

    a sixth field effect transistor, with gate terminal of the sixth field effect transistor electrically connected to the sixth select line, source terminal of the sixth field effect transistor electrically connected to the low voltage signal line, and drain terminal of the third field effect transistor electrically connected to the first scan line or the second scan line of the second-column pixel unit;

    wherein the second switch unit further comprises;

    a seventh select line and an eighth select line, both arranged in row direction;

    a second driver, for outputting a voltage select signal to the seventh select line or the eighth select line;

    a seventh field effect transistor, with gate terminal of the seventh field effect transistor electrically connected to the seventh select line, source terminal of the seventh field effect transistor electrically connected to one of channels of the data driver, and drain terminal of the seventh field effect transistor electrically connected to the data line of one of odd-row data rows;

    an eighth field effect transistor, with gate terminal of the eighth field effect transistor electrically connected to the eighth select line, source terminal of the eighth field effect transistor electrically connected to the said channel of the data driver, and drain terminal of the eighth field effect transistor electrically connected to the data line of adjacent even-row;

    wherein when the first driver outputs a high voltage to the first select line, the fifth select line and the sixth select line, and outputs a low voltage to the second select line, the third select line, the fourth select line and the low voltage signal line, the first field effect transistor, the fourth field effect transistor and the fifth field effect transistor are conductive, and the second field effect transistor, the third field effect transistor and the fourth field effect transistor are turned off so that scan signal outputted by one of channels of scan driver passes through the first field effect transistor to the first scan line of the first-column pixel unit, low voltage signal from the low voltage signal line passes through the fifth field effect transistor to the second scan line of the first-column pixel unit, and through the sixth field effect transistor to the first scan line or the second scan line of the second-column pixel unit to select supplying the scan signal to the odd-row pixel unit of the first-column pixel unit;

    when the second driver outputs a high voltage to the seventh select line and outputs a low voltage to the eighth select line, the seventh field effect transistor is conductive and the eighth field effect transistor is turned off so that the data signal outputted by one of channels of data driver passes through the seventh field effect transistor to the data line of one of odd-row data lines to select supplying the data signal to pixel unit of same odd-row;

    when the first driver outputs a high voltage to the second select line, the fourth select line and the sixth select line, and outputs a low voltage to the first select line, the third select line, the fifth select line and the low voltage signal line, the second field effect transistor, the fourth field effect transistor and the sixth field effect transistor are conductive, and the first field effect transistor, the third field effect transistor and the fifth field effect transistor are turned off so that scan signal outputted by the said channel of scan driver passes through the second field effect transistor to the second scan line of the first-column pixel unit, low voltage signal from the low voltage signal line passes through the fourth field effect transistor to the first scan line of the first-column pixel unit, and through the sixth field effect transistor to the first scan line or the second scan line of the second-column pixel unit to select supplying the scan signal to the even-row pixel unit of the first-column pixel unit;

    when the second driver outputs a high voltage to the eighth select line and outputs a low voltage to the seventh select line, the eighth field effect transistor is conductive and the seventh field effect transistor is turned off so that data signal outputted by the said channel of the data driver passes through the eighth field effect transistor to the data line of an adjacent even-row to select supplying the data signal to the pixel unit of same even-row;

    when the first driver outputs a high voltage to the third select line, the fourth select line and the fifth select line, and outputs a low voltage to the first select line, the second select line, the sixth select line and the low voltage signal line, the third field effect transistor, the fourth field effect transistor and the fifth field effect transistor are conductive, and the first field effect transistor, the second field effect transistor and the sixth field effect transistor are turned off so that scan signal outputted by the said channel of the scan driver passes through the third field effect transistor to the first scan line or the second scan line of the second-column pixel unit, low voltage signal from the low voltage signal line passes through the fourth field effect transistor to the first scan line of the first-column pixel unit, and through the fifth field effect transistor to the second scan line the first-column pixel unit to select supplying the scan signal to the odd-row or the even-row pixel unit of the second-column pixel unit;

    when the second driver outputs a high voltage to the eighth select line and outputs a low voltage to the seventh select line, the eighth field effect transistor is conductive and the seventh field effect transistor is turned off so that data signal outputted by the said channel of the data driver passes through the eighth field effect transistor to the data line of an adjacent even-row to select supplying the data signal to the pixel unit of same even-row.

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