Sub-pixel structure in transflective color liquid crystal display
First Claim
1. A transflective liquid crystal display having a plurality of pixels, comprising:
- a first substrate having a common electrode;
a second substrate; and
a liquid crystal layer disposed between the first and second substrate, the liquid crystal layer comprising a plurality of layer segments associated with a plurality of pixels, wherein at least some of the pixels comprise a plurality of sub-pixels and wherein at least three of the sub-pixels are color sub-pixels for providing three different colors in the liquid crystal display and at least one of the sub-pixels is a fourth sub-pixel for providing a fourth color different from said three colors, and wherein each of the color sub-pixels comprises a transmission area having a transmissive electrode disposed on the second substrate and a reflection area having a reflective electrode disposed on the second substrate, and the fourth sub-pixel comprises a further reflective electrode disposed on the second substrate, wherein the fourth sub-pixel has a reflection area associated with the further reflective electrode, said fourth sub-pixel further comprises a transmission area having a further transmissive electrode disposed on the second substrate.
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Accused Products
Abstract
The pixel in a transflective color LCD panel of the present invention has an additional sub-pixel area. According to the present invention, a pixel is selectively divided into at least three color sub-pixels in R, G, B and a fourth sub-pixel M. Each of the color sub-pixels R, G and B is selectively divided into a transmission area and a reflection area. The fourth sub-pixel M can be entirely reflective or partially reflective. The color filter for use in the pixel comprises R, G, B color filter segments corresponding to the R, G, B color sub-pixels and a filter segment for the fourth sub-pixel. The filter segment for the fourth sub-pixel can be entirely colorless or partially colorless. Furthermore, one or more of the R, G, B color filer segments associated with the reflection area may have a colorless sub-segment.
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Citations
21 Claims
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1. A transflective liquid crystal display having a plurality of pixels, comprising:
- a first substrate having a common electrode;
a second substrate; and
a liquid crystal layer disposed between the first and second substrate, the liquid crystal layer comprising a plurality of layer segments associated with a plurality of pixels, wherein at least some of the pixels comprise a plurality of sub-pixels and wherein at least three of the sub-pixels are color sub-pixels for providing three different colors in the liquid crystal display and at least one of the sub-pixels is a fourth sub-pixel for providing a fourth color different from said three colors, and wherein each of the color sub-pixels comprises a transmission area having a transmissive electrode disposed on the second substrate and a reflection area having a reflective electrode disposed on the second substrate, and the fourth sub-pixel comprises a further reflective electrode disposed on the second substrate, wherein the fourth sub-pixel has a reflection area associated with the further reflective electrode, said fourth sub-pixel further comprises a transmission area having a further transmissive electrode disposed on the second substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a first substrate having a common electrode;
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18. A method to improve viewing quality of a transflective liquid crystal display having a plurality of pixels, said method comprising the steps of:
- partitioning each of at least some of the pixels into a plurality of sub-pixels, wherein at least three of the sub-pixels are color sub-pixels for providing three different colors in the display and at least one of the sub-pixels is a fourth sub-pixel for providing a fourth color different from the three colors;
partitioning each of said color sub-pixels into a transmission area having a transmissive electrode and a reflection area having a reflective electrode; and
providing a further reflective electrode in the fourth sub-pixel, wherein the fourth sub-pixel is partitioned into a transmission area and a reflection area, the reflection area being associated with the further reflective electrode, said method further comprising the step of providing a further transmissive electrode in the transmission area of the fourth sub-pixel. - View Dependent Claims (19, 20, 21)
- partitioning each of at least some of the pixels into a plurality of sub-pixels, wherein at least three of the sub-pixels are color sub-pixels for providing three different colors in the display and at least one of the sub-pixels is a fourth sub-pixel for providing a fourth color different from the three colors;
Specification