Liquid crystal display device with light transmission and reflection regions
First Claim
1. A liquid crystal display device comprising:
- a first substrate and a second substrate;
a liquid crystal layer interposed between the first substrate and the second substrate;
a first polarizer provided on a surface of the first substrate which is opposite the liquid crystal layer;
a second polarizer provided on a surface of the second substrate which is opposite the liquid crystal layer;
a first phase compensation element provided between the first polarizer and the liquid crystal layer; and
a second phase compensation element provided between the second polarizer and the liquid crystal layer, wherein a plurality of pixel areas are provided for display, each of the plurality of pixel areas is a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode region defining the reflection area and a transmissive electrode region defining the transmission area are formed in correspondence with each pixel area on the second substrate, and wherein a thickness (d1) of the liquid crystal layer in the transmissive electrode region and a thickness (d2) of the liquid crystal layer in the reflective electrode region are defined by a relationship d1>
d2, and wherein thickness d1 is substantially larger than thickness d2 so that electrooptical characteristics of the reflection area and the transmission area are approximately matched.
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Abstract
A liquid crystal display device includes a first substrate; a second substrate; a liquid crystal layer interposed between the first substrate and the second substrate; a first polarizer provided on a surface of the first substrate which is on the opposite side to the liquid crystal layer; a second polarizer provided on a surface of the second substrate which is on the opposite side to the liquid crystal layer; a first phase compensation element provided between the first polarizer and the liquid crystal layer; and a second phase compensation element provided between the second polarizer and the liquid crystal layer. A plurality of pixel areas are provided for display. The first substrate includes at least one transmissive electrode, and the second substrate includes a reflective electrode region and a transmissive electrode region in correspondence with each of the plurality of pixel areas.
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Citations
19 Claims
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1. A liquid crystal display device comprising:
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a first substrate and a second substrate;
a liquid crystal layer interposed between the first substrate and the second substrate;
a first polarizer provided on a surface of the first substrate which is opposite the liquid crystal layer;
a second polarizer provided on a surface of the second substrate which is opposite the liquid crystal layer;
a first phase compensation element provided between the first polarizer and the liquid crystal layer; and
a second phase compensation element provided between the second polarizer and the liquid crystal layer, wherein a plurality of pixel areas are provided for display, each of the plurality of pixel areas is a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode region defining the reflection area and a transmissive electrode region defining the transmission area are formed in correspondence with each pixel area on the second substrate, and wherein a thickness (d1) of the liquid crystal layer in the transmissive electrode region and a thickness (d2) of the liquid crystal layer in the reflective electrode region are defined by a relationship d1>
d2, and wherein thickness d1 is substantially larger than thickness d2 so that electrooptical characteristics of the reflection area and the transmission area are approximately matched.
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2. A liquid crystal display device comprising:
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a first substrate and a second substrate;
a liquid crystal layer interposed between the first substrate and the second substrate;
a first polarizer provided on a surface of the first substrate which is opposite the liquid crystal layer;
a second polarizer provided on a surface of the second substrate which is opposite the liquid crystal layer;
a first phase compensation element provided between the first polarizer and the liquid crystal layer; and
a second phase compensation element provided between the second polarizer and the liquid crystal layer, wherein a plurality of pixel areas are provided for display, each of the plurality of pixel areas comprises a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode region defining the reflection area and a trasmissive electrode region defining the transmission area are formed in correspondence with each pixel area on the second substrate, wherein a thickness (d1) of the liquid crystal Layer in the transmissive electrode region and a thickness (d2) of the liquid crystal layer in the reflective electrode region are defined by a relationship d1>
2×
d2.
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3. A liquid crystal display device comprising:
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a first substrate and a second substrate;
a liquid crystal layer interposed between at least the first substrate and the second substrate;
a first polarizer supported by the first substrate;
a second polarizer supported by the second substrate;
wherein a plurality of pixel areas are provided for display, at least one of the pixel areas comprising a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode is provided in at least the reflection area and a transmissive electrode is provided in at least the transmission area, said reflective and transmissive electrodes each being supported by the second substrate; and
wherein a thickness (d1) of the liquid crystal layer in the transmissive area and a thickness (d2) of the liquid crystal layer in the reflection urea are defined by a relationship d1>
d2, and wherein thickness d1 substantially larger than thickness d2.- View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. A liquid crystal display device comprising:
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a first substrate and a second substrate;
a liquid crystal layer interposed between at least the first substrate and the second substrate;
wherein a plurality of pixel areas are provided for display, at least one of the pixel areas comprising a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode is provided in at least the reflection area and a transmissive electrode is provided in at least the transmission area, said reflective and transmissive electrodes each being supported by the second substrate; and
wherein a thickness (d1) of the liquid crystal layer in the transmissive area and a thickness (d2) of the liquid crystal layer in the reflection area are defined by a relationship d1≧
d2×
2.- View Dependent Claims (13, 14, 15, 16, 17)
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18. A liquid crystal display device comprising:
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a first substrate and a second substrate;
a liquid crystal layer interposed between at least the first substrate and the second substrate;
wherein at least one pixel area comprises a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode is provided in at least the reflection area and a transmissive electrode is provided in at least the transmission area, maid reflective and transmissive electrodes each being supported by the second substrate;
wherein a thickness (d1) of the liquid crystal layer in the transmissive area and a thickness (d2) of the liquid crystal layer in the reflection area are defined by a relationship d1>
d2, and wherein thickness d1 is substantially larger ban thickness d2, and wherein the reflective electrode at least partially overlaps the transmissive electrode.
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19. A liquid crystal display device comprising a first substrate, a second substrate, and a liquid crystal layer provided between at least the first and second substrates, a plurality of pixel regions comprising respective electrodes for applying voltage to the liquid crystal layer,
wherein each of a plurality of the pixel regions includes a reflection region and a transmission region, and wherein light reflected in said reflection regions and light transmitted through said transmission regions are utilized in displaying an image; -
wherein the first substrate includes a reflection electrode region provided in at least the reflection region of a pixel region and a transmission electrode region provided in at least the transmission region of the pixel region; and
wherein the reflection electrode region is higher than the transmission electrode region, forming a step on a surface of the first substrate, and thus a thickness of the liquid crystal layer in the reflection region is smaller than a thickness of the liquid crystal layer in the transmission region.
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Specification