LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREOF
First Claim
1. A liquid crystal display device, comprising:
- a display panel including a plurality of sub-pixels and a first substrate, a second substrate and a liquid crystal layer interposed between the first substrate and the second substrate, wherein the first substrate comprises a first electrode, the second substrate comprises a second electrode;
at least one protrusion disposed on the first electrode or the second electrode; and
a drive circuit electrically connected to the display panel and outputting a drive voltage applied between the first electrode and the second electrode corresponding to one of the sub-pixels;
wherein, when a transmittance of the sub-pixel is changed from a first transmittance to a second transmittance higher than the first transmittance in a first frame period, the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is higher than a first target drive voltage corresponding to the second transmittance in a front half period of the first frame period, the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is equal to the first target drive voltage in a rear half period of the first frame period, and the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is equal to the first target drive voltage in other frame periods after the first frame period.
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Accused Products
Abstract
A liquid crystal display device and a driving method thereof are provided. The drive circuit of the liquid crystal display device outputs a drive voltage applied between the first electrode and the second electrode of a pixel. When a transmittance of the sub-pixel is changed from a first transmittance to a second transmittance higher than the first transmittance in a first frame period, the drive voltage is higher than a first target drive voltage corresponding to the second transmittance in a front half period of the first frame period, the drive voltage is equal to the first target drive voltage in a rear half period of the first frame period, and the drive voltage is equal to the first target drive voltage in other frame periods after the first frame period.
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20 Claims
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1. A liquid crystal display device, comprising:
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a display panel including a plurality of sub-pixels and a first substrate, a second substrate and a liquid crystal layer interposed between the first substrate and the second substrate, wherein the first substrate comprises a first electrode, the second substrate comprises a second electrode; at least one protrusion disposed on the first electrode or the second electrode; and a drive circuit electrically connected to the display panel and outputting a drive voltage applied between the first electrode and the second electrode corresponding to one of the sub-pixels; wherein, when a transmittance of the sub-pixel is changed from a first transmittance to a second transmittance higher than the first transmittance in a first frame period, the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is higher than a first target drive voltage corresponding to the second transmittance in a front half period of the first frame period, the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is equal to the first target drive voltage in a rear half period of the first frame period, and the drive voltage applied between the first electrode and the second electrode corresponding to the sub-pixel is equal to the first target drive voltage in other frame periods after the first frame period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A driving method of a liquid crystal display device, wherein the liquid crystal display panel comprises a display panel, at least one protrusion and a drive circuit, the display panel comprises a plurality of sub-pixels and a first substrate, a second substrate and a liquid crystal layer interposed between the first substrate and the second substrate, the first substrate comprises a first electrode, the second substrate comprises a second electrode, the protrusion is disposed on the first electrode or the second electrode, the drive circuit is electrically connected to the display panel and outputs a drive voltage applied between the first electrode and the second electrode corresponding to one of the sub-pixels, and the driving method comprises:
when a transmittance of the sub-pixel is changed from a first transmittance to a second transmittance higher than the first transmittance in a first frame period, applying the drive voltage between the first electrode and the second electrode corresponding to the sub-pixel, wherein the drive voltage is higher than a first target drive voltage corresponding to the second transmittance in a front half period of the first frame period, the drive voltage is equal to the first target drive voltage in a rear half period of the first frame period, and the drive voltage is equal to the first target drive voltage in other frame periods after the first frame period. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A driving method of a liquid crystal display device, wherein the liquid crystal display panel comprises a display panel, at least one protrusion and a drive circuit, the display panel comprises a plurality of sub-pixels and a first substrate, a second substrate and a liquid crystal layer interposed between the first substrate and the second substrate, the first substrate comprises a first electrode, the second substrate comprises a second electrode, the protrusion is disposed on the first electrode or the second electrode, the protrusion functions as a local restriction mechanism to restrict arrangement directions of a plurality of liquid crystal molecules corresponding to the sub-pixel to make long axes of the liquid crystal molecules become substantial vertical when no externally applied voltage is present, make the long axes of the liquid crystal molecules become substantial parallel when a predetermined voltage is externally applied, and make directions of the long axes of most of the liquid crystal molecules become tilted when a voltage lower than the predetermined voltage is externally applied, the drive circuit is electrically connected to the display panel and outputs a drive voltage applied between the first electrode and the second electrode corresponding to one of the sub-pixels, and the driving method comprises:
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when a transmittance of the sub-pixel is changed from a first transmittance to a second transmittance higher than the first transmittance in a first frame period, applying the drive voltage between the first electrode and the second electrode corresponding to the sub-pixel, wherein the drive voltage is higher than a first target drive voltage corresponding to the second transmittance in a front half period of the first frame period, the drive voltage is equal to the first target drive voltage in a rear half period of the first frame period, and the drive voltage is equal to the first target drive voltage in other frame periods after the first frame period; and when the transmittance of the sub-pixel is changed from the first transmittance to a third transmittance higher than the second transmittance in a second frame period, applying the drive voltage between the first electrode and the second electrode corresponding to the sub-pixel, wherein the drive voltage is higher than a second target drive voltage corresponding to the third transmittance in a front half period of the second frame period, the drive voltage is equal to the second target drive voltage in a rear half period of the second frame period, and the drive voltage is equal to the second target drive voltage in other frame periods after the second frame period.
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Specification