Patent US5686932A successfully refreshed from Google Patents.
US5686932A
Expired / Lapsed
US
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Compensative driving method type liquid crystal display device
Assignee: Toshiba Corp
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Filing: 1994-11-15
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Granted: 1997-11-11
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Expires: 2014-11-15
Abstract
Abstract To compensate for voltage level shifts on the electrode of a liquid crystal display (LCD) pixel caused by parasitic capacitances between electrodes of a switching, thin film transistor (TFT) operating to apply image signal voltages to the LCD pixel electrode, a controlled voltage is applied to a storage capacitor connected in parallel with the LCD pixel to compensate for the voltage level shifts. As a result, an LCD image display, free of flicker and brightness nonuniformities, is achieved.
Inventors
- 👤 Satoru Tomita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:49
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G3/3655; G09G2300/00; G09G2300/08; G09G2300/0876; G09G2320/00; G09G2320/02; G09G2320/0204; G09G2320/0219; G09G2320/0247
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
222 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; and means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the storage capacitor line voltage, the polarity of which is inverted with respect to a second standard potential white substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage in each frame period.
Claim 2
Dependent Claim
222 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; and means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the storage capacitor line voltage, the polarity of which is inverted with respect to a second standard potential white substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage in each frame period.
Claim 3
Dependent Claim
24 words
The liquid crystal display device of claim 1, further comprising counter electrode driving means for supplying a direct current voltage to the counter electrode.
Claim 4
Dependent Claim
300 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; means for supplying a storage capacitor line voltage to the storage capacitor line; and counter electrode driving means for applying a direct current voltage to the counter electrode, wherein the storage capacitor line voltage, the polarity of which is inverted with respect to a second standard potential while substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein an amplitude of the storage capacitor line voltage, substantially synchronized with the image signal voltage, is in the range of |-CDS×dVX/Cs|/5 to |-CDS×dVX/Cs|×10, wherein CDS is a parasitic capacitance associated with a drain electrode of the transistor switching element and a source electrode of the transistor switching element, dVX is an amplitude of the image signal voltage, and Cs is a capacitance of the storage capacitor.
Claim 5
Dependent Claim
300 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; means for supplying a storage capacitor line voltage to the storage capacitor line; and counter electrode driving means for applying a direct current voltage to the counter electrode, wherein the storage capacitor line voltage, the polarity of which is inverted with respect to a second standard potential while substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein an amplitude of the storage capacitor line voltage, substantially synchronized with the image signal voltage, is in the range of |-CDS×dVX/Cs|/5 to |-CDS×dVX/Cs|×10, wherein CDS is a parasitic capacitance associated with a drain electrode of the transistor switching element and a source electrode of the transistor switching element, dVX is an amplitude of the image signal voltage, and Cs is a capacitance of the storage capacitor.
Claim 6
Dependent Claim
26 words
The liquid crystal display device of claim 3, wherein the amplitude of the storage capacitor line voltage, substantially synchronized with the image signal voltage, is |-CDS×dVX/Cs|.
Claim 7
Dependent Claim
79 words
The liquid crystal display device of claim 1, wherein the counter electrode is connected to counter electrode voltage driving means for supplying a counter electrode voltage having a counter voltage polarity inverted with respect to a third standard potential while synchronized with the image signal voltage and having a polarity inverted with respect to the third standard potential whose polarity is the same as that of the storage capacitor line voltage inverted with respect to the second standard potential.
Claim 8
Dependent Claim
26 words
The liquid crystal display device of claim 5, wherein the amplitude of the storage capacitor line voltage is larger than that of the counter electrode voltage.
Claim 9
Dependent Claim
306 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; and means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the storage capacitor line voltage, the polarity which is inverted with respect to a second standard potential while substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the amplitude of the storage capacitor line voltage is in the range of |{(CGS+CDS+Cs)dVc-CDS×dvX}/Cs|/5 to |{(CGS+CDS+Cs)dVc-CDS×dVX}/Cs|×10, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, CDS is a parasitic capacitance associated with a drain electrode and the source electrode of the transistor switching element, dVc is an amplitude of the counter electrode voltage applied to the counter electrode, dVX is an amplitude of the image signal voltage, and Cs is a capacitance of the storage capacitor.
Claim 10
Dependent Claim
306 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; and means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the storage capacitor line voltage, the polarity which is inverted with respect to a second standard potential while substantially synchronized with the polarity inversion of the image signal voltage, is applied to the storage capacitor line so as to compensate for a change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the amplitude of the storage capacitor line voltage is in the range of |{(CGS+CDS+Cs)dVc-CDS×dvX}/Cs|/5 to |{(CGS+CDS+Cs)dVc-CDS×dVX}/Cs|×10, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, CDS is a parasitic capacitance associated with a drain electrode and the source electrode of the transistor switching element, dVc is an amplitude of the counter electrode voltage applied to the counter electrode, dVX is an amplitude of the image signal voltage, and Cs is a capacitance of the storage capacitor.
Claim 11
Dependent Claim
19 words
The liquid crystal display device of claim 7, wherein the amplitude of the storage capacitor line voltage is |{(CGS+CDS+Cs)dVc-CDS×dVX}/Cs|.
Claim 12
Dependent Claim
231 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line disposed substantially in parallel with the scanning line; and storage capacitor line driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein a potential level of the storage capacitor line voltage is changed substantially synchronizing with the scanning pulse, a direction of the potential level change of the storage capacitor line voltage is opposite to a direction of a potential level change of the scanning pulse, so as to compensate for a change of liquid crystal applying voltage substantially synchronizing with the scanning pulse.
Claim 13
Dependent Claim
231 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines, and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line disposed substantially in parallel with the scanning line; and storage capacitor line driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein a potential level of the storage capacitor line voltage is changed substantially synchronizing with the scanning pulse, a direction of the potential level change of the storage capacitor line voltage is opposite to a direction of a potential level change of the scanning pulse, so as to compensate for a change of liquid crystal applying voltage substantially synchronizing with the scanning pulse.
Claim 14
Dependent Claim
35 words
The liquid crystal display device of claim 9, further comprising counter electrode driving means for supplying a direct current voltage to the counter electrode, the counter electrode driving means being connected to the counter electrode.
Claim 15
Dependent Claim
68 words
The liquid crystal display device of claim 10, wherein a change of the storage capacitor line voltage, substantially synchronizing with the scanning pulse, is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 16
Dependent Claim
20 words
The liquid crystal display device of claim 11, wherein the potential change of the storage capacitor line voltage is |(-CGS×dVY)/Cs|.
Claim 17
Dependent Claim
47 words
The liquid crystal display device of claim 9, further comprising counter electrode voltage driving means for applying a counter electrode voltage, having a counter electrode voltage polarity inverted with respect to a second standard potential while substantially synchronized with the image signal voltage, to the counter electrode.
Claim 18
Dependent Claim
67 words
The liquid crystal display device of claim 13, wherein a change of the storage capacitor line voltage substantially synchronized with the scanning pulse is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance between a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 19
Dependent Claim
25 words
The liquid crystal display device of claim 14, wherein the change of the storage capacitor line voltage, substantially synchronized with the scanning pulse, is |(-CGS×dVY)/Cs|.
Claim 20
Dependent Claim
272 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage in each frame period, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse in each frame period.
Claim 21
Dependent Claim
272 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage in each frame period, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse in each frame period.
Claim 22
Dependent Claim
325 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronized with the scanning pulse, is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 23
Dependent Claim
325 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronized with the scanning pulse, is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 24
Dependent Claim
25 words
The liquid crystal display device of claim 17, wherein the change of the storage capacitor line voltage, substantially synchronizing with the scanning pulse, is |(-CGS×dVY)/Cs|.
Claim 25
Dependent Claim
339 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein the change of the storage capacitor line voltage, substantially synchronizing with the image signal voltage, is in the range of |-CDS{VX(TF1)-VX(TF2)}/Cs|/5 to |-CDS{VX(TF1)-VX(TF2)}/Cs|×5 wherein CDS is a parasitic capacitance associated with a drain electrode and a source electrode of the transistor switching element, VX(TF1) is an image signal voltage for one period (TF1), VX(TF2) is an image signal voltage for a next period (TF2) and Cs is a capacitance of the storage capacitor.
Claim 26
Dependent Claim
339 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect with the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a direct current voltage is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor formed between the pixel electrode and a storage capacitor line; and storage capacitor line voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a second standard potential while synchronized with the polarity inversion of the image signal voltage so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the polarity inversion of the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein the change of the storage capacitor line voltage, substantially synchronizing with the image signal voltage, is in the range of |-CDS{VX(TF1)-VX(TF2)}/Cs|/5 to |-CDS{VX(TF1)-VX(TF2)}/Cs|×5 wherein CDS is a parasitic capacitance associated with a drain electrode and a source electrode of the transistor switching element, VX(TF1) is an image signal voltage for one period (TF1), VX(TF2) is an image signal voltage for a next period (TF2) and Cs is a capacitance of the storage capacitor.
Claim 27
Dependent Claim
27 words
The liquid crystal display device of claim 19, wherein the potential change of the storage capacitor line voltage, substantially synchronized with the image signal voltage, is |-CDS{VX(TF1)-VX(TF2)}/Cs|.
Claim 28
Dependent Claim
302 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse in each frame period.
Claim 29
Dependent Claim
302 words
A liquid crystal display device comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse in each frame period.
Claim 30
Dependent Claim
359 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronizing with the scanning pulse, is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 31
Dependent Claim
359 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronizing with the scanning pulse, is in the range of |(-CGS×dVY)/Cs|/2 to |(-CGS×dVY)/Cs|×2, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, dVY is an amplitude of the scanning pulse and Cs is a capacitance of the storage capacitor.
Claim 32
Dependent Claim
25 words
The liquid crystal display device of claim 22, wherein the change of the storage capacitor line voltage, substantially synchronizing with the scanning pulse, is |(-CGS×dVY)/Cs|.
Claim 33
Dependent Claim
417 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronized with the polarity inversion of the image signal voltage, is in the range of |(CGS+CDS+Cs){VX(TF1)-VX(TF2)}-CDS{VX(TF1)-VX(TF2)}/Cs|/5 to |(CGS+CDS+Cs){VC(TF1)-VC(TF2)}-CDS{VX(TF1)-VX(TF2)}/Cs|.times.10, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, CDS is a parasitic capacitance associated with a drain electrode and a source electrode of the transistor switching element, Cs is a capacitance of the storage capacitor, VC(TF1) is a counter electrode voltage for one period (TF1), VC(TF2) is a counter electrode voltage for a next period (TF2), VX(TF1) is an image signal voltage for one period (TF1), and VX(TF2) is an image signal voltage for a next period (TF2).
Claim 34
Dependent Claim
417 words
A liquid crystal display device, comprising: matrix wiring having a plurality of scanning lines and a plurality of signal lines disposed to intersect the plurality of scanning lines, wherein a scanning pulse is applied to the scanning lines and an image signal voltage, having a polarity periodically inverted with respect to a first standard potential, is applied to the signal lines; a pixel electrode disposed at each intersection of the plurality of scanning lines and the plurality of signal lines; a transistor switching element included at each intersection of the plurality of scanning lines and the plurality of signal lines and connected to each pixel electrode; a counter electrode disposed opposite to the pixel electrode, wherein a counter electrode voltage, having a counter voltage polarity inverted with respect to a second standard potential while synchronized with the image signal voltage, is applied to the counter electrode; a liquid crystal composition held between the pixel electrode and the counter electrode; a storage capacitor line and a storage capacitor formed between the pixel electrode and the storage capacitor line disposed in parallel with the scanning lines; and storage capacitor voltage driving means for supplying a storage capacitor line voltage to the storage capacitor line, wherein the polarity of the storage capacitor line voltage is inverted with respect to a third standard potential in the same direction as the polarity of the counter electrode voltage while synchronizing with the counter electrode voltage, so as to compensate for a first change of a liquid crystal applying voltage substantially synchronized with the image signal voltage, and wherein the potential of the storage capacitor line voltage changes while substantially synchronized with the scanning pulse so as to compensate for a second change of a liquid crystal applying voltage substantially synchronized with the scanning pulse, and wherein a change of the storage capacitor line voltage, substantially synchronized with the polarity inversion of the image signal voltage, is in the range of |(CGS+CDS+Cs){VX(TF1)-VX(TF2)}-CDS{VX(TF1)-VX(TF2)}/Cs|/5 to |(CGS+CDS+Cs){VC(TF1)-VC(TF2)}-CDS{VX(TF1)-VX(TF2)}/Cs|.times.10, wherein CGS is a parasitic capacitance associated with a gate electrode and a source electrode of the transistor switching element, CDS is a parasitic capacitance associated with a drain electrode and a source electrode of the transistor switching element, Cs is a capacitance of the storage capacitor, VC(TF1) is a counter electrode voltage for one period (TF1), VC(TF2) is a counter electrode voltage for a next period (TF2), VX(TF1) is an image signal voltage for one period (TF1), and VX(TF2) is an image signal voltage for a next period (TF2).
Claim 35
Dependent Claim
30 words
The liquid crystal display device of claim 24, wherein the change of the storage capacitor line voltage, substantially synchronized with the polarity inversion of the image signal voltage, is |(CGS+CDS+Cs){VC(TF1)-VC(TF2)}-CDS{VX(TF1)-VX(TF2)}/Cs|.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-11-10 | 2001-05-12 | 2001-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-10 | 2005-05-12 | 2005-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-10 | 2009-05-12 | 2009-11-11 | $7700.00 | Window Closed / Lapsed |