Illuminating device, having two identical lamps connected in par

Details Illuminating device, having two identical lamps connected in par Illuminating device, having two identical lamps connected in par

1990-12-12

1992-02-18

Lazarus, Ira S.

Illumination

Curvilinear light source

362252, 362 23, 362260, 359 48, F21S 500, G02F 113

Patent

active

050899430

ABSTRACT:
An illuminating device has two lamps developed as discharge tubes which have a serpentine course and are nested in each other by, in each case, a narrow U-shaped region and a wide U-shaped region. In this way both lamps can be of identical development and permit uniform illumination of a rectangular liquid crystal cell even upon failure of one lamp.

REFERENCES:
patent: 2728845 (1955-12-01), Potter
patent: 4748546 (1988-05-01), Ukrainsky
patent: 4945350 (1990-07-01), Kawamura
patent: 4950053 (1990-08-01), Haim et al.
Information Display, Band 5, Nr. 11, Nov. 1989, pp. 8-13, New York, U.S.; W. B. Mercer, et al: "Fluorescent Backlights for LCDs".

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