Field sequentially driven liquid crystal display device
First Claim
1. A liquid crystal display device comprising:
- a first liquid crystal cell including a first pair of opposing substrates and a first liquid crystal layer held between said first pair of substrates, said first pair of substrates having at least a first pair of pixel electrodes for displaying predetermined characters and figures, and an alignment state of said first liquid crystal layer being capable of being controlled by adjusting a voltage applied across said first pair of pixel electrodes;
a second liquid crystal cell including a second pair of opposing substrates and a second liquid crystal layer held between said second pair of substrates, said second pair of substrates having a second pair of pixel electrodes for completely covering in area said predetermined characters and figures, and an alignment state of said second liquid crystal layer being capable of being controlled by adjusting a voltage applied across said second pair of pixel electrodes;
two cross polarizers disposed on both sides of a two-layer structure panel including said first and second liquid crystal cells along a normal direction of said substrates;
a light source capable of emitting lights of a plurality of colors; and
a control circuit for time sequentially dividing one frame into a plurality of subframes, emitting light of a predetermined color in each subframe, synchronously with light emission, controlling a state of light transmission and light shielding of a plurality of display areas of said two-layer structure panel including said first and second liquid crystal cells,wherein said first and second liquid crystal cells are structured in a mutual optical compensation relation in both a driving state and a non-driving state.
1 Assignment
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Accused Products
Abstract
A liquid crystal display device with improved visual recognition is provided which includes: a first liquid crystal cell; a second liquid crystal cell; two cross polarizers disposed on both sides of a two-layer structure panel including the first and second liquid-crystal cells along a normal direction of the substrates;
a light source capable of emitting lights of a plurality of colors; and a control circuit for time sequentially dividing one frame into a plurality of subframes, emitting light of a predetermined color in each subframe, synchronously with light emission, controlling a state of light transmission and light shielding of a plurality of display areas of said two-layer structure panel including said first and second liquid crystal cells, wherein the first and second liquid crystal cells are structured in a mutual optical compensation relation in both a driving state and a non-driving state.
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Citations
17 Claims
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1. A liquid crystal display device comprising:
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a first liquid crystal cell including a first pair of opposing substrates and a first liquid crystal layer held between said first pair of substrates, said first pair of substrates having at least a first pair of pixel electrodes for displaying predetermined characters and figures, and an alignment state of said first liquid crystal layer being capable of being controlled by adjusting a voltage applied across said first pair of pixel electrodes; a second liquid crystal cell including a second pair of opposing substrates and a second liquid crystal layer held between said second pair of substrates, said second pair of substrates having a second pair of pixel electrodes for completely covering in area said predetermined characters and figures, and an alignment state of said second liquid crystal layer being capable of being controlled by adjusting a voltage applied across said second pair of pixel electrodes; two cross polarizers disposed on both sides of a two-layer structure panel including said first and second liquid crystal cells along a normal direction of said substrates; a light source capable of emitting lights of a plurality of colors; and a control circuit for time sequentially dividing one frame into a plurality of subframes, emitting light of a predetermined color in each subframe, synchronously with light emission, controlling a state of light transmission and light shielding of a plurality of display areas of said two-layer structure panel including said first and second liquid crystal cells, wherein said first and second liquid crystal cells are structured in a mutual optical compensation relation in both a driving state and a non-driving state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A driving method for a liquid crystal display device comprising:
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a first liquid crystal cell including a first pair of opposing substrates and a first liquid crystal layer held between said first pair of substrates, said first pair of substrates having at least a first pair of pixel electrodes for displaying predetermined characters and figures, and an alignment state of said first liquid crystal layer being capable of being controlled by adjusting a voltage applied across said first pair of pixel electrodes; a second liquid crystal cell including a second pair of opposing substrates and a second liquid crystal layer held between said second pair of substrates, said second pair of substrates having a second pair of pixel electrodes for completely covering in area said predetermined characters and figures, and an alignment state of said second liquid crystal layer being capable of being controlled by adjusting a voltage applied across said second pair of pixel electrodes; two cross polarizers disposed on both sides of a two-layer structure panel including said first and second liquid crystal cells along a normal direction of said substrates; a light source capable of emitting lights of a plurality of colors; and a control circuit for time sequentially dividing one frame into a plurality of subframes, emitting light of a predetermined color in each subframe, synchronously with light emission, controlling a state of light transmission and light shielding of a plurality of display areas of said two-layer structure panel including said first and second liquid crystal cells, wherein the driving method controls in such a manner that a display area entered in the light shielding state in a subframe is made to enter in another subframe. - View Dependent Claims (14)
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15. A driving method for a liquid crystal display device comprising:
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a first liquid crystal cell including a first pair of opposing substrates and a first liquid crystal layer held between said first pair of substrates, said first pair of substrates having at least a first pair of pixel electrodes for displaying predetermined characters and figures, and an alignment state of said first liquid crystal layer being capable of being controlled by adjusting a voltage applied across said first pair of pixel electrodes; a second liquid crystal cell including a second pair of opposing substrates and a second liquid crystal layer held between said second pair of substrates, said second pair of substrates having a second pair of pixel electrodes for completely covering in area said predetermined characters and figures, and an alignment state of said second liquid crystal layer being capable of being controlled by adjusting a voltage applied across said second pair of pixel electrodes; two cross polarizers disposed on both sides of a two-layer structure panel including said first and second liquid crystal cells along a normal direction of said substrates; a light source capable of emitting lights of a plurality of colors; and a control circuit for time sequentially dividing one frame into a plurality of subframes, emitting light of a predetermined color in each subframe, synchronously with light emission, controlling a state of light transmission and light shielding of a plurality of display areas of said two-layer structure panel including said first and second liquid crystal cells, wherein the driving method controls in such a manner that gradation display is performed by controlling the alignment state of the liquid crystal of at least one of said first and second liquid crystal cells to have an intermediate alignment state between the driving state and non-driving state. - View Dependent Claims (16, 17)
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Specification