Driving method of active matrix display device
First Claim
1. A method for driving an active matrix display device comprising:
- applying a potential Vp to a data line Pm for a pixel electrode;
applying a potential VH to a common line Yn; and
changing said potential VH for said common line Yn to a potential VL before or at the same time when a first selection pulse Vx for a first field is applied to a scan line Xn corresponding to said data line Pm and said common line Yn,wherein each of said potentials VH and VL applied to said common line Yn is different from a standard voltage Vc, andwherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH.
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Accused Products
Abstract
In a liquid crystal display device of the in-plane switching mode (IPS mode), the potential of data that is output from a data driver is set at values between potentials that are given to common lines. Two levels, i.e., high and low levels, are prepared for the potential to be given to the common lines and the potential is inverted between those levels in every field, whereby the polarity of a voltage between both electrodes of a pixel is inverted. As a result, the potential variation ranges of signals that are output from the data driver and a scan driver can be greatly reduced from those of the conventional case, which contributes to reduction in the power consumption of the drivers. Since the voltage applied to a switching element for controlling each pixel can be reduced, the load of the switching element can also be reduced.
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Citations
40 Claims
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1. A method for driving an active matrix display device comprising:
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applying a potential Vp to a data line Pm for a pixel electrode; applying a potential VH to a common line Yn; and changing said potential VH for said common line Yn to a potential VL before or at the same time when a first selection pulse Vx for a first field is applied to a scan line Xn corresponding to said data line Pm and said common line Yn, wherein each of said potentials VH and VL applied to said common line Yn is different from a standard voltage Vc, and wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for driving an active matrix display device comprising:
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applying a potential Vp to a data line Pm fox a pixel electrode; applying a potential VH to a common line Yn; changing said potential VH for said common line Yn to a standard voltage Vc before a first selection pulse VX for a first field is applied to a scan line Xn corresponding to said data line Pm and said common line Yn; and changing said potential Vc for said common line Yn to a potential VL at the same time when the first selection pulse VX to said scan line Xn, wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for driving an active matrix display device comprising a pixel portion having a plurality of scan lines, a plurality of data lines, a plurality of common lines, a plurality of switching elements for switching pixel electrodes over a substrate, said method comprising:
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applying a potential Vp to a data line Pm for a pixel electrode; applying a potential VY to a common line Yn; and inverting said potential VY for said common line Yn before or at the same time when a first selection pulse VX for a fist field is applied to a scan line Xn corresponding to said data line Pm and said common line Yn, wherein a value of said potential VY for said common line Yn equals a potential (Voffset+Vamp) or Voffset, wherein said Vamp is a potential of an image information, and wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method for driving an active matrix display device comprising:
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applying a potential Vp to a data line Pm connected to a source of a pixel thin film transistor over a substrate; applying a potential VH to a common line Yn over said substrate; and changing said potential VH of said common line Yn to a potential VL before or at the same time when a first selection pulse VX for a first field is applied to a scan line Xn connected to a gate of said pixel Thin film transistor, wherein each of said potentials VH and VL applied to said common line Yn is different from a standard voltage Vc, and wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (23, 24, 25, 26, 27)
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28. A method for driving an active matrix display device comprising:
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applying a potential Vp to a data line Pm connected to a source of a pixel thin film transistor over a substrate; applying a potential VH to a common line Yn over said substrate; changing said potential VH of said common line Yn to a standard voltage Vc before a first selection pulse VX for a first field is applied to a scan line Xn connected to a gate of said pixel thin film transistor; and changing said potential Vc of said common line Yn to a potential VL at the same time when the first selection pulse VX to said scan line Xn, wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. A method for driving an active matrix display device comprising the steps of:
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applying a potential Vp to a data line Pm for a pixel electrode; applying a potential VY to a common line Yn; and changing said potential VY for said common line Yn to a potential VH or VL before or at the same time when a first selection pulse VX for a first field is applied to a scan line Xn corresponding to said data line Pm and said common line Yn, wherein said VH and VL are maximum and minimum potentials given to said common lines, respectively, wherein said potential Vp to said data line Pm satisfies a condition VL≦
Vp≦
VH. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification