EP0415349A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Driving method of liquid crystal display
Assignee: Toshiba Corp
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Filing: 1990-08-28
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Granted: —
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Expires: 2010-08-28
Abstract
Abstract A liquid crystal display has a plurality of display pixels arranged in a matrix and a plurality of signal and scan (X1-Xm, Y1-Ym) orthogonally crossing one another and connected to the display pixels. Each of the display pixels includes a liquid crystal dot (311-3nm), a switching element (411-4nm) and a color filter to which at least one of color signals R, G and B is supplied. A method of driving the liquid crystal display comprises the step of inverting polarities of the signal lines for every scan in line-sequentially scanning the display pixels, and shifting the phase of polarity inversion of each of the signal lines to which the color signals R, G and B are supplied.
Inventors
- 👤 Haruhiko Okumura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:15
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3614; G09G3/3607; G09G2320/00; G09G2320/02; G09G2320/0247
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
112 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the method comprising the step of: inverting polarities of the signal lines for every scan in line-sequentially scanning the display pixels, and shifting the phase of polarity inversion of each of the signal lines to which the color signals R, G and B are supplied.
Claim 2
Independent Claim
112 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the method comprising the step of: inverting polarities of the signal lines for every scan in line-sequentially scanning the display pixels, and shifting the phase of polarity inversion of each of the signal lines to which the color signals R, G and B are supplied.
Claim 3
Independent Claim
105 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the method comprising the step of: changing a polarity of one of the color signals R, G and B from the polarity of the remaining two color signals, and inverting the polarities of the color signals between frames.
Claim 4
Independent Claim
105 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the method comprising the step of: changing a polarity of one of the color signals R, G and B from the polarity of the remaining two color signals, and inverting the polarities of the color signals between frames.
Claim 5
Independent Claim
113 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the color filters being shifted by 1/2 pitches in adjacent rows in the matrix, the method comprising the step of: changing phases and cycles of polarity inversion of the color signals R, G and B for the respective signal lines in line-sequentially scanning the display pixels.
Claim 6
Independent Claim
113 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the color filters being shifted by 1/2 pitches in adjacent rows in the matrix, the method comprising the step of: changing phases and cycles of polarity inversion of the color signals R, G and B for the respective signal lines in line-sequentially scanning the display pixels.
Claim 7
Independent Claim
136 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the color filters being shifted by 1/2 pitches in adjacent rows to form a delta with each three of the color filters, the method comprising the step of: inverting polarities of the signal lines for every scan, and shifting phases of polarity inversion of the color signals R, G and B for the respective signal lines, thereby equalizing intensities of the display pixels in each delta in a frame.
Claim 8
Independent Claim
136 words
A method of driving a liquid crystal display having a plurality of display pixels arranged in a matrix and a plurality of signal and scan lines orthogonally crossing one another and connected to the display pixels, each of the display pixels including a liquid crystal dot, a switching element and a color filter to which at least one of color signals R, G and B is supplied, the color filters being shifted by 1/2 pitches in adjacent rows to form a delta with each three of the color filters, the method comprising the step of: inverting polarities of the signal lines for every scan, and shifting phases of polarity inversion of the color signals R, G and B for the respective signal lines, thereby equalizing intensities of the display pixels in each delta in a frame.
References Cited (Backward Citations)
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