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US 2003/0197820 A1Published application
Multi-color display device
AssigneeFuji Xerox Co., Ltd.
InventorsNaoki Hiji, Shigeru Yamamoto, Takehito Hikichi, Teiichi Suzuki
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AssigneeFuji Xerox Co., Ltd.
InventorsNaoki Hiji, Shigeru Yamamoto, Takehito Hikichi, Teiichi Suzuki
Estimating the term…
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.
A multi-color display layer comprising four display layers laminated with one another, the display layers being capable of varying a state for reflecting each of blue, green, yellow and red or an achromatic state depending upon an external stimulus.
A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a 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, wherein the display layer most remote from the observation side is a display layer reflecting red, and a color filter which transmits red and absorbs a light of the other colors is provided between the display layer reflecting red and a display layer close to the observation side by one layer from the display layer reflecting red.
A multi-color display device comprising a plurality of display layers laminated with one another, the display layers each comprising a 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, wherein each of the plurality of display layers is provided between a pair of electrodes and a driving voltage is individually applied to every display layer.
Dependencies are inferred from the claim text.
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1. Field of the Invention
The present invention relates to a multi-color display device used as a display panel of an electric apparatus.
2. Description of the Related Art
In the following description, the same parts are designated by the same reference numbers throughout the several drawings:
FIG. 1 is a view showing one example of a multi-color display device of the present invention;
FIG. 2 is a view showing one example of a multi-color display device of the present invention;
[First Embodiment]
<First Case (in the Case of Three Layers)>
FIG. 1 shows a first case of the first embodiment. This first case is one example of the inventions.
In which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells: for wavelength filtering or…
Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two…
Characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction…
Optical devices or arrangements for the control of light by modification of
Term end not estimated