| 摘要 |
PURPOSE:To eliminate the need to install a fluorescent body layer under a vacuum and to eliminate a brightness problem caused by the variation of a fluorescent body itself due to a heat history by composing a display device of a liquid crystal display element, a fluorescent body layer, and an ultraviolet-ray generator. CONSTITUTION:A transparent glass plate 3 where a transparent electrode 2 is formed and a transparent glass plate 5 where a transparent electrode 4 is formed are put together with the electrodes 2 and 4 opposite each other properly, liquid crystal 6 is charged in the opposite electrode space, and a polarizing plate 7 is arranged on the top surface of the transparent glass plate 5, thus, constituting a liquid crystal display element 1. The transparent plate 8 is formed of glass or organic resin and the fluorescent body layer 9 is formed on the transparent plate 8. The transparent plate 8 where the fluorescent body layer 9 is formed is brought into contact with the surface of the transparent glass plate 3 and fixed, and the ultraviolet-ray generator 10 is arranged behind the transparent plate 8. The ultrasonic-ray generator 10 is turned on all the time and a ultraviolet ray impinges the fluorescent body layer 9, which is placed in a heat generation state; and the liquid crystal display element 1 is driven to make a display by the light emission of the fluorescent body.
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