Multi-color display device
First Claim
1. A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a single cholesteric liquid crystal layer and each having a different wave band of a selective reflection, wherein a helix sense of a cholesteric liquid crystal of at least one display layer is different from those of cholesteric liquid crystals of the other display layers.
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Accused Products
Abstract
A reflective-type multi-color display device is capable of obtaining a vivid and bright multi-color display with less display layers, and therefore, with a state where a parallax is decreased and a cost of the device can be reduced. Specifically, the display device of the present invention includes a cell 51 having a display layer 31 comprising a right-handed cholesteric liquid crystal which selects and reflects blue, a cell 53 having a display layer 33 comprising a left-handed cholesteric liquid crystal which selects and reflects green, a cell 57 having a display layer 37 comprising a right-handed cholesteric liquid crystal which selects and reflects yellow and a cell 55 having a display layer 35 comprising a left-handed cholesteric liquid crystal which selects and reflects red, these layers being laminated in this order from the observation side. A color filter 43 which transmits red and absorbs the other color light is provided between the cell 57 and the cell 55. A black light-absorbing layer 41 is formed at the back side of the cell 55.
88 Citations
10 Claims
- 1. A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a single cholesteric liquid crystal layer and each having a different wave band of a selective reflection, wherein a helix sense of a cholesteric liquid crystal of at least one display layer is different from those of cholesteric liquid crystals of the other display layers.
- 6. A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a single cholesteric liquid crystal layer and each having a different wave band of a selective reflection, wherein the helix senses of the cholesteric liquid crystals of all the display layers are the same, and a retardation layer for changing reversely a circular deviation is provided between one display layer and the other display layer adjacent to the one layer.
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9. A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a single cholesteric liquid crystal layer and each having a different wave band of a selective reflection, wherein:
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a helix sense of a cholesteric liquid crystal of at least one display layer is different from those of cholesteric liquid crystals of the other display layers;
oreach of the display layers has a cholesteric liquid crystal, each of the cholesteric liquid crystal having a same helix sense, and a retardation layer for changing reversely a circular deviation is provided between one display layer and another display layer adjacent to the one layer.
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10. A multi-color display device comprising a plurality of cholesteric liquid crystal layer laminated with each other and each having a different wave band of a selective reflection, wherein a helix sense of a cholesteric liquid crystal of at least one cholesteric liquid crystal layer is different from those of cholesteric liquid crystals of the other cholesteric liquid crystal layers.
Specification