| 摘要 |
PURPOSE:To suppress a temperature rise of a diffusing plate and a liquid crystal cell in an illuminating box, to raise display quality, and to extend the life of the titled indicator, by providing radiation fins on a member for supporting a fluorescent tube, in a liquid crystal device provided with the fluorescent tube. CONSTITUTION:An illuminating box 10 is attached to a liquid crystal cell 1, and in its illuminating box 10, a diffusing plate 4, a fluorescent tube 2, and a reflecting plate 3 are provided. Its fluorescent tube 2 is supported by supporting members 5a, 5b. Also, in its supporting members 5a, 5b, radiation fins 9a, 9b, 9c and 9d are formed. Moreover, as for the fluorescent tube 2, a cold cathode fluorescent tube, and a hot cathode fluorescent tube are used. In this state, a temperature rise by the fluorescent tube 2 is brought to heat radiation by the radiation fins 9a, 9b, 9c and 9d. Accordingly, since the radiation fin is provided on the fluorescent tube, a temperature rise of the diffusing plate, the liquid crystal cell, etc., in the illuminating box is suppressed, a picture quality of a high quality is obtained, and the titled indicator can be extended to a long life. |
