Fringe field switching mode transflective liquid crystal display
First Claim
Patent Images
1. A fringe field switching mode transflective liquid crystal display having a dual cell gap structure, in which a cell gap of a transmissive area is different from a cell gap of a reflective area, the fringe field switching mode transflective liquid crystal display comprising:
- a lower substrate having a counter electrode and a pixel electrode in a form of a slit;
an upper substrate aligned in opposition to the lower substrate;
a liquid crystal layer interposed between the lower and upper substrates;
an upper polarizing plate aligned at an outer portion of the upper substrate;
a lower polarizing plate aligned at an outer portion of the lower substrate;
a reflective plate provided at an inner portion of the lower substrate in the reflective area by interposing an organic resin layer therebetween;
a lower λ
/2 plate provided between the lower substrate having the reflective plate and the lower polarizing plate; and
an upper λ
/2 plate provided between the upper substrate and the upper polarizing plate, wherein an inclination angle, a slit width and a slit interval of the pixel electrode formed in the reflective area are different from those of the pixel electrode formed in the transmissive area, a phase delay of the liquid crystal layer formed in the reflective area is in a range of about 0 to λ
/4, and a phase delay of the liquid crystal layer formed in the transmissive area is in a range of about 0 to λ
/2.
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Abstract
Disclosed is a fringe field switching mode transflective liquid crystal display capable of displaying high quality images. The transflective liquid crystal display includes a lower substrate having a counter electrode and a pixel electrode, an upper substrate aligned in opposition to the lower substrate by interposing a liquid crystal layer therebetween, an upper polarizing plate, a lower polarizing plate, a reflective plate provided at an inner portion of the lower substrate, a lower λ/2 plate, and an upper λ/2 plate. An inclination angle, a slit width and a slit interval of the pixel electrode of the reflective area are different from those of the pixel electrode of the transmissive area. The liquid crystal layer presents a phase delay of about 0 to λ/4 in the reflective area and presents a phase delay of about 0 to λ/2 in the transmissive area.
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Citations
21 Claims
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1. A fringe field switching mode transflective liquid crystal display having a dual cell gap structure, in which a cell gap of a transmissive area is different from a cell gap of a reflective area, the fringe field switching mode transflective liquid crystal display comprising:
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a lower substrate having a counter electrode and a pixel electrode in a form of a slit;
an upper substrate aligned in opposition to the lower substrate;
a liquid crystal layer interposed between the lower and upper substrates;
an upper polarizing plate aligned at an outer portion of the upper substrate;
a lower polarizing plate aligned at an outer portion of the lower substrate;
a reflective plate provided at an inner portion of the lower substrate in the reflective area by interposing an organic resin layer therebetween;
a lower λ
/2 plate provided between the lower substrate having the reflective plate and the lower polarizing plate; and
an upper λ
/2 plate provided between the upper substrate and the upper polarizing plate, wherein an inclination angle, a slit width and a slit interval of the pixel electrode formed in the reflective area are different from those of the pixel electrode formed in the transmissive area, a phase delay of the liquid crystal layer formed in the reflective area is in a range of about 0 to λ
/4, and a phase delay of the liquid crystal layer formed in the transmissive area is in a range of about 0 to λ
/2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fringe field switching mode transflective liquid crystal display having a single cell gap structure, in which a cell gap of a transmissive area is identical to a cell gap of a reflective area, the fringe field switching mode transflective liquid crystal display comprising:
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a lower substrate having a counter electrode and a pixel electrode in a form of a slit;
an upper substrate aligned in opposition to the lower substrate;
a liquid crystal layer interposed between the lower and upper substrates;
an upper polarizing plate aligned at an outer portion of the upper substrate;
a lower polarizing plate aligned at an outer portion of the lower substrate;
a reflective plate provided at an inner portion of the lower substrate in the reflective area;
an upper λ
/4 plate provided between the lower substrate having the reflective plate and the liquid crystal layer; and
a lower λ
/4 plate provided between the lower substrate and the lower polarizing plate, wherein an inclination angle, a slit width and a slit interval of the pixel electrode formed in the reflective area are different from those of the pixel electrode formed in the transmissive area, a phase delay of the liquid crystal layer formed in the reflective area is in a range of about 0 to λ
/2, and a phase delay of the liquid crystal layer formed in the transmissive area is in a range of about 0 to λ
/2. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A fringe field switching mode transflective liquid crystal display having a single cell gap structure, in which a cell gap of a transmissive area is identical to a cell gap of a reflective area, the fringe field switching mode transflective liquid crystal display comprising:
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a lower substrate having a counter electrode and a pixel electrode;
an upper substrate aligned in opposition to the lower substrate;
a liquid crystal layer interposed between the lower and upper substrates;
an upper polarizing plate aligned at an outer portion of the upper substrate;
a lower polarizing plate aligned at an outer portion of the lower substrate;
a reflective plate provided at an inner portion of the lower substrate in the reflective area; and
a λ
/4 plate provided between the lower substrate having the reflective plate and the liquid crystal layer, wherein an inclination angle, a slit width and a slit interval of the pixel electrode formed in the reflective area are different from those of the pixel electrode formed in the transmissive area, and the λ
/4 plate is patterned such that the transmissive area of the reflective plate is opened.
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Specification
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Current AssigneeHydis Technology Company Limited (E Ink Holdings Incorporated)
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Original AssigneeBOE HYDIS Technology Company Limited (SK Hynix Inc.)
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InventorsKim, Hyang Yul, Jeong, Youn Hak, Kim, Kwi Hyun, Park, Jun Baek
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current349/141
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CPC Class CodesG02F 1/133555 TransflectorsG02F 1/133638 Waveplates, i.e. plates wit...G02F 1/134363 for applying an electric fi...G02F 2201/122 having a particular pattern
