Picture display device and method of driving the same
First Claim
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1. A projection type display device comprising a screen and a panel,the panel comprising:
- a first pixel comprising a first switching element, wherein the first switching element is electrically connected to a scan line and a first signal line,a second pixel comprising a second switching element, wherein the second switching element is electrically connected to the scan line and a second signal line, and wherein the first pixel and the second pixel are adjacent to each other,a gate driver electrically connected to the scan line,a source driver electrically connected to the first signal line and the second signal line, anda signal processing circuit electrically connected to the source driver,wherein the signal processing circuit is configured to modify original signals to a pair of first signals and second signals each including the original signals and to provide the source driver with a pair of video signals comprising the video signals with a first polarity and the video signals with a second polarity, andwherein the source driver is configured to sample one of the first video signals with the first polarity and apply to the first signal line, and to sample one of the second video signals with the second polarity and apply to the second signal line.
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Abstract
In a picture display device, a picture having high gradation is obtained by using an alternating method which can deal with a video signal having a high frequency band region. On the basis of an input signal, a signal processing circuit outputs a pair of analog video signals (a signal reversal frequency is one frame), which have inversion relationships with each other, to a signal line drive circuit, and the signal line drive circuit applies one of the inputted pair of video signals to an odd signal line, and applies the other of the video signals to an even signal line, so that source line reversal drive is carried out.
29 Citations
18 Claims
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1. A projection type display device comprising a screen and a panel,
the panel comprising: -
a first pixel comprising a first switching element, wherein the first switching element is electrically connected to a scan line and a first signal line, a second pixel comprising a second switching element, wherein the second switching element is electrically connected to the scan line and a second signal line, and wherein the first pixel and the second pixel are adjacent to each other, a gate driver electrically connected to the scan line, a source driver electrically connected to the first signal line and the second signal line, and a signal processing circuit electrically connected to the source driver, wherein the signal processing circuit is configured to modify original signals to a pair of first signals and second signals each including the original signals and to provide the source driver with a pair of video signals comprising the video signals with a first polarity and the video signals with a second polarity, and wherein the source driver is configured to sample one of the first video signals with the first polarity and apply to the first signal line, and to sample one of the second video signals with the second polarity and apply to the second signal line. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A projection type display device comprising a screen and a panel,
the panel comprising: -
a pixel comprising a switching element, wherein the switching element is electrically connected to a scan line and a signal line, a gate driver electrically connected to the scan line, a source driver electrically connected to the signal line, and a signal processing circuit comprising a correction circuit, a first D/A conversion circuit, a second D/A conversion circuit, a first reversal circuit and a second reversal circuit, wherein the correction circuit is configured to modify original signals to a pair of first signals and second signals each including the original signals, wherein the first D/A conversion circuit is configured to convert the first signals to first video signals and the first reversal circuit is configured to provide the first video signals with a first polarity to the source driver, wherein the second D/A conversion circuit is configured to convert the second signals to second video signals and the second reversal circuit is configured to provide the second video signals with a second polarity to the source driver, and wherein the source driver is configured to sample one of the first video signals with the first polarity and apply to the signal line, and to sample one of the second video signals with a second polarity and apply to an adjacent signal line. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A projection type display device comprising a screen and a panel,
the panel comprising: -
a pixel comprising a switching element, wherein the switching element is electrically connected to a scan line and a signal line, a gate driver electrically connected to the scan line, a source driver comprising a first shift register, a second shift register, a first switch, and a second switch, and electrically connected to the signal line, and a signal processing circuit comprising a correction circuit, a first D/A conversion circuit, and a second D/A conversion circuit, a first reversal circuit, and a second reversal circuit, wherein the correction circuit is configured to modify original signals to a pair of first signals and second signals each including the original signals, wherein the first D/A conversion circuit is configured to convert the first signals to first video signals and the first reversal circuit is configured to provide the first video signals with a first polarity to the source driver, wherein the second D/A conversion circuit is configured to convert the second signals to second video signals and the second reversal circuit is configured to provide the second video signals with a second polarity to the source driver, wherein the source driver is configured to sample one of the first video signals with the first polarity and apply to the signal line through the first switch controlled by the first shift register and to sample one of the second video signals and apply to an adjacent signal line through the second switch controlled by the second shift register in series. - View Dependent Claims (15, 16, 17, 18)
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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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InventorsHiroki, Masaaki
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Primary Examiner(s)SHAH, PRIYANK J
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Application NumberUS11/710,529Publication NumberTime in Patent Office3,515 DaysField of Search345/96, 345/98, 345/100US Class Current1/1CPC Class CodesG09G 2310/027 Details of drivers for data...G09G 2320/0247 Flicker reduction other tha...G09G 2320/0276 for the purpose of adaptati...G09G 2330/021 Power management, e.g. powe...G09G 3/2011 by amplitude modulationG09G 3/3614 Control of polarity reversa...G09G 3/3648 using an active matrix G09G...G09G 3/3688 suitable for active matrice...H04N 9/3105 for displaying all colours ...
