Electric lamp and discharge devices: systems – Pulsating or a.c. supply
Patent
1991-10-08
1993-06-15
Pascal, Robert J.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
3151693, 3151694, 315DIG1, 313493, 313634, H05B 4116
Patent
active
052202496
ABSTRACT:
A flat type fluorescent lamp device is constituted by two transparent glass plates assembled and sealed together thereby forming a glass plate assembly, a discharge channel formed in a serpentine form by a groove on at least one of the two transparent glass plates with the inner surface of the groove carrying a fluorescent film. A pair of electrodes are provided, electrode each at each end of the discharge channel, a light diffuser provided on the front surface of the glass plate assembly and a light reflector is provided at the back surface of the glass plate assembly. In one aspect of the invention, at least another electrode is provided between the two electrodes thereby dividing the discharge channel into a plurality of individual discharge channels, in which case it is possible to ensure that all of the individual channels have the same electric characteristics and can be caused to be lit in parallel by a single power source. The device is light and compact and has uniform luminosity distribution, so that the device is suitable for use in liquid crystal display panels.
REFERENCES:
patent: 2265323 (1941-12-01), Spanner
patent: 3594610 (1971-07-01), Evans et al.
patent: 4584501 (1986-04-01), Cocks et al.
patent: 4751434 (1988-06-01), Helling et al.
patent: 5041762 (1991-08-01), Hartai
NEC Corporation
Pascal Robert J.
Ratliff R. A.
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