Pseudo multi-domain design for improved viewing angle and color shift
First Claim
1. A liquid crystal display (LCD) panel, comprising:
- a pixel array having a plurality of unit pixels, each being in a single-domain configuration, comprising;
a first set of unit pixels, wherein each of the first set of unit pixels comprises electrodes generally parallel to one another; and
a second set of unit pixels, wherein each of the second set of unit pixels comprises electrodes generally parallel to one another, but not generally parallel to the electrodes of the first set of unit pixels, wherein the electrodes of the first set of unit pixels are tilted by a first angle in a first angular direction with respect to a vertical axis of the LCD panel, and wherein the electrodes of the second set of unit pixels are tilted by a second angle in a second angular direction with respect to the vertical axis, and wherein the first and second angular directions are opposite from each other, wherein the magnitudes of the first and second angles are not substantially equal;
wherein the plurality of unit pixels are arranged in a plurality of groups, wherein each group comprises three directly adjacent unit pixels coupled to a common scanning line, wherein the three unit pixels comprise a red unit pixel, a blue unit pixel, and a green unit pixel, and wherein the three unit pixels within each group comprise either two unit pixels from the first set and one unit pixel from the second set, or one unit pixel from the first set and two unit pixels from the second set.
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Abstract
Aspects of the present disclosure relate to single-domain electrode configurations that may be implemented in the unit pixels of a LCD device, such as a fringe field switching (FFS) LCD, to provide a “pseudo-multi-domain” effect, wherein the benefits of both conventional single-domain and multi-domain pixel configuration devices are retained. In accordance with aspects of the present technique, single-domain unit pixels are angled or tilted in differing directions with respect to a vertical axis of the LCD panel (e.g., y-axis) to provide an alternating and/or periodic arrangement of different-angled pixel electrodes along each scanning line, data line, or a combination of both scanning and data lines. In this manner, the transmittance rates of conventional single-domain LCD panels may be retained while providing for improved viewing angle and color shift properties typical of conventional multi-domain LCD panels.
131 Citations
33 Claims
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1. A liquid crystal display (LCD) panel, comprising:
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a pixel array having a plurality of unit pixels, each being in a single-domain configuration, comprising; a first set of unit pixels, wherein each of the first set of unit pixels comprises electrodes generally parallel to one another; and a second set of unit pixels, wherein each of the second set of unit pixels comprises electrodes generally parallel to one another, but not generally parallel to the electrodes of the first set of unit pixels, wherein the electrodes of the first set of unit pixels are tilted by a first angle in a first angular direction with respect to a vertical axis of the LCD panel, and wherein the electrodes of the second set of unit pixels are tilted by a second angle in a second angular direction with respect to the vertical axis, and wherein the first and second angular directions are opposite from each other, wherein the magnitudes of the first and second angles are not substantially equal; wherein the plurality of unit pixels are arranged in a plurality of groups, wherein each group comprises three directly adjacent unit pixels coupled to a common scanning line, wherein the three unit pixels comprise a red unit pixel, a blue unit pixel, and a green unit pixel, and wherein the three unit pixels within each group comprise either two unit pixels from the first set and one unit pixel from the second set, or one unit pixel from the first set and two unit pixels from the second set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A liquid crystal display (LCD) panel, comprising:
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a pixel array having a plurality of unit pixels arranged in a rows and columns defined by scanning lines and data lines, respectively, the pixel array comprising; a first set of unit pixels, wherein each of the first set of unit pixels comprises electrodes generally parallel to one another but not generally parallel to a vertical axis of the LCD panel; and a second set of unit pixels, wherein each of the second set of unit pixels comprises electrodes generally parallel to one another, but not generally parallel to the electrodes of the first set of unit pixels or the vertical axis, wherein the electrodes of the first set of unit pixels are tilted by a first angle in a first angular direction with respect to the vertical axis, and wherein the electrodes of the second set of unit pixels are tilted by a second angle in a second angular direction with respect to the vertical axis, and wherein the first and second angular directions are opposite from each other, wherein the magnitudes of the first and second angles are not substantially equal; wherein the scanning lines comprise a first set of scanning lines and a second set of scanning lines, and wherein each of the first set of unit pixels is coupled to one of the first set of scanning lines and respective data lines, and wherein each of the unit pixels from the second set of unit pixels is coupled to one of a second set of scanning lines and respective data lines, wherein the first and second sets of scanning lines are arranged in an alternating manner along the vertical axis of the LCD panel, and wherein each of the data lines are oriented such that the portions of each data line disposed between adjacent scanning lines are generally parallel to the electrodes of directly adjacent unit pixels. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for displaying image data in a liquid crystal display (LCD) panel having an array of unit pixels arranged in rows and columns defined by scanning lines and data lines, respectively, the method comprising:
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supplying a data signal representative of at least a portion of the image data to each of the data lines; and supplying a scanning signal to each of the scanning lines, wherein the scanning lines comprises a first set of scanning lines and a second set of scanning lines, wherein the first set of scanning lines is coupled to a first set of unit pixels having pixel electrodes oriented at a first angle with respect to a vertical axis of the LCD panel in a first angular direction, wherein the second set of scanning lines is coupled to a second set of unit pixels having pixel electrodes oriented at a second angle with respect to the vertical axis in a second angular direction, wherein the magnitudes of the first and second angles are not substantially equal, and wherein the first and second sets of scanning lines are arranged in an alternating manner along the vertical axis; wherein the first and second angular directions are opposite from each other, and wherein each data line has a generally zigzag generally shape along the vertical axis and is oriented such that the portions of each data line between adjacent scanning lines are generally parallel to the electrodes of directly adjacent unit pixels. - View Dependent Claims (20, 21, 22)
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23. A method for masking disclinations in a liquid crystal display (LCD) panel, comprising:
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providing a light-opaque material disposed over a pixel array comprising a plurality of unit pixels arranged in rows and columns defined by scanning lines and data lines, respectively, the plurality of unit pixels comprising; a first set of unit pixels having pixel electrodes oriented in a first angular direction at a first angle with respect to a vertical axis of the LCD panel and configured to generate an electrical field in a first direction; and a second set of unit pixels having pixel electrodes oriented in a second angular direction opposite the first angular direction and at a second angle with respect to the vertical axis and configured to generate an electrical field in a second direction; wherein an electrical field in the first direction and an electrical field in the second direction respectively generated by two directly adjacent unit pixels, including one unit pixel from the first set and one unit pixel from the second set, interfere with each other and cause one or more disclinations to form between the directly adjacent unit pixels, the one or more disclinations at least partially preventing light provided from a light source from being transmitted through the first unit pixel or the second unit pixel; wherein the light-opaque material forms a matrix defining a light-transmissive aperture bordered by the light-opaque material over each of the plurality of unit pixels, wherein the light-opaque borders corresponding to the directly adjacent unit pixels mask the one or more disclinations. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A liquid crystal display (LCD) panel, comprising:
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a pixel array having a plurality of unit pixels comprising; a first set of unit pixels having substantially straight pixel electrodes oriented in a first angular direction at a first angle that is less than 90 degrees with respect to a vertical axis of the LCD panel; and a second set of unit pixels having substantially straight pixel electrodes oriented in a second angular direction opposite the first angular direction and at a second angle that is less than 90 degrees with respect to the vertical axis; wherein the magnitudes of the first and second angles are not equal; and a liquid crystal layer comprising a plurality of liquid crystal molecules disposed between a lower alignment layer and an upper alignment layer, wherein the lower and upper alignment layers are configured to align the liquid crystal layer in a direction that is offset from the vertical axis of the LCD panel by a third angle having a magnitude that is between the magnitudes of the first and the second angles. - View Dependent Claims (30, 31, 32, 33)
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Specification