Liquid crystal display device, active matrix type liquid crystal display device, and method of driving the same
First Claim
Patent Images
1. A method of driving an active matrix type liquid crystal display device comprising:
- during a first frame, applying first image signals to a first group of pixels with a first polarity and a second group of pixels with a second polarity opposite to said first polarity, wherein said first group of the pixels is adjacent to said second group of the pixels with a first boundary therebetween; and
during a second frame subsequent to said first frame, applying second image signals to a third group of pixels with the first polarity and a fourth group of pixels with the second polarity wherein said third group of the pixels is adjacent to said fourth group of the pixels with a second boundary therebetween, said second boundary being in a different position from said first boundary, wherein said third group of pixels is partly overlapped with the first group of pixels, and said fourth group of the pixels is partly overlapped with the first group of the pixels.
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Abstract
A liquid crystal display device with no flicker and with bright excellent display is provided. A polarity pattern of a conventional frame inversion driving is one kind of display. A polarity pattern of a conventional source line inversion driving is two kinds of display, and a disclination pattern is one kind of display. On the contrary, in a circuit structure of the present invention, polarity patterns are made to have not less than four kinds, and disclination patterns are made to have not less than two kinds. By this, bright display in which flicker is not included and poor display due to disclination is improved, can be obtained.
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Citations
32 Claims
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1. A method of driving an active matrix type liquid crystal display device comprising:
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during a first frame, applying first image signals to a first group of pixels with a first polarity and a second group of pixels with a second polarity opposite to said first polarity, wherein said first group of the pixels is adjacent to said second group of the pixels with a first boundary therebetween; and
during a second frame subsequent to said first frame, applying second image signals to a third group of pixels with the first polarity and a fourth group of pixels with the second polarity wherein said third group of the pixels is adjacent to said fourth group of the pixels with a second boundary therebetween, said second boundary being in a different position from said first boundary, wherein said third group of pixels is partly overlapped with the first group of pixels, and said fourth group of the pixels is partly overlapped with the first group of the pixels. - View Dependent Claims (7, 11, 15, 19, 23, 27, 31)
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2. A method of driving an active matrix type liquid crystal device comprising:
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during a first field, applying first image signals to a first group of pixels with a first polarity and a second group of pixels with a second polarity opposite to said first polarity, wherein said first group of the pixels is adjacent to said second group of the pixels with a first boundary therebetween; and
during a second field subsequent to said first frame, applying second image signals to a third group of pixels with the first polarity and fourth group of pixels with the second polarity wherein said third group of the pixels is adjacent to said fourth group of the pixels with a second boundary therebetween, said second boundary being in a different position from said first boundary, wherein said third group of the pixels is partly overlapped with the first group of the pixels, and said fourth group of the pixels is partly overlapped with the first group of the pixels. - View Dependent Claims (8, 12, 16, 20, 24, 28, 32)
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3. A method of driving an active matrix type liquid crystal display device comprising:
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during a first frame, applying first image signals to a first group of n signal lines with a negative polarity and a second group of n signal lines with a positive polarity, wherein said first group of the n signal lines is contiguous to said second group of the n signals with a first boundary therebetween where n is 2 or more; and
during a second frame subsequent to said first frame, applying second image signals to a third group of n signal lines with a first polarity and a fourth group of n signal lines with a positive polarity wherein said third group of the n signal lines is contiguous to said fourth group of the n signal lines with a second boundary therebetween. - View Dependent Claims (5, 9, 13, 17, 21, 25, 29)
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4. A method of driving an active matrix type liquid crystal device comprising:
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during a first field, applying first image signals to a first group of n signal lines with a negative polarity and a second group of n signal lines with a positive polarity, wherein said first group of the n signal lines is contiguous to said second group of the n signals with a first boundary therebetween where n is 2 or more; and
during a second field subsequent to said first frame, applying second image signals to a third group of n signal lines with a negative polarity and fourth group of n signal lines with a positive polarity wherein said third group of the n signal lines is contiguous to said fourth group of the n signal lines with a second boundary therebetween. - View Dependent Claims (6, 10, 14, 18, 22, 26, 30)
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Specification
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Current AssigneeSemiconductor Energy Laboratory Co., Ltd.
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Original AssigneeSemiconductor Energy Laboratory Co., Ltd.
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InventorsHirakata, Yoshiharu
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current345/96
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CPC Class CodesG09G 2310/0213 controlling the sequence of...G09G 2320/0209 Crosstalk reduction, i.e. t...G09G 2320/0247 Flicker reduction other tha...G09G 3/3614 Control of polarity reversa...G09G 3/3677 suitable for active matrice...G09G 3/3688 suitable for active matrice...
