Backlight apparatus having ventilating holes for liquid crystal

Details Backlight apparatus having ventilating holes for liquid crystal Backlight apparatus having ventilating holes for liquid crystal

1992-09-30

1994-02-01

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 50, 362218, G02F 1133, F21S 300

Patent

active

052836746

ABSTRACT:
A liquid crystal display apparatus which prevents illumination of light by non-uniform brightness from a fluorescent lamp employed for the backlight illumination which is caused by mercury enclosed in the fluorescent tube being deposited on the inner surface of the tube of the fluorescent lamp. The liquid crystal display apparatus comprises a liquid crystal display panel, a backlight apparatus including a fluorescent lamp disposed on the rear face side of the liquid crystal display panel for directing illuminating backlight upon the liquid crystal display panel, and a reflecting plate disposed remote from the liquid crystal display panel with respect to the fluorescent lamp. The reflecting plate has a plurality of ventilating holes formed at portions of a recessed portion thereof opposing to an outer periphery of the fluorescent lamp.

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