Planar fluorescent lamp having a serpentine chamber and sidewall

Details Planar fluorescent lamp having a serpentine chamber and sidewall Planar fluorescent lamp having a serpentine chamber and sidewall

1994-08-12

1995-10-31

Weldon, Ulysses

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313491, H01J 1704, H01J 61067

Patent

active

054632749

ABSTRACT:
A planar fluorescent lamp having a sealed chamber and divider walls to create a serpentine discharge path is provided with sidewall electrodes. A plurality of sidewall electrodes are spaced from each other and positioned adjacent each sidewall of the sealed chamber. In a preferred embodiment, the sidewall electrodes are planar, cold electrode plates. The electrodes extend generally from one divider wall to the other divider wall along a single sidewall. In alternative embodiments, the sidewall electrodes are positioned within the chamber directly exposed to the mercury vapor, or, alternatively, are separated from the chamber by a dielectric layer. The sidewall electrodes are powered in pairs, each pair being driven at a different frequency than any other pair. Providing sidewall electrodes increases the uniformity of light emission from the lamp as well as increasing the overall range over which the light can be dimmed, aids in starting the lamp and increasing the overall brightness of the light output from the lamp.

REFERENCES:
patent: 1984215 (1934-12-01), Hotchner
patent: 2255431 (1941-09-01), Marden et al.
patent: 2405518 (1946-08-01), Polevitzky
patent: 2555749 (1951-06-01), Krefft
patent: 2733368 (1956-01-01), Kolkman
patent: 2774918 (1956-12-01), Lemmers
patent: 2900545 (1959-08-01), Rulon et al.
patent: 3047763 (1962-07-01), Inman
patent: 3121184 (1964-02-01), Fox
patent: 3198943 (1965-08-01), Pistey
patent: 3226590 (1965-12-01), Christy
patent: 3253176 (1966-05-01), Pate et al.
patent: 3258630 (1966-06-01), Scott
patent: 3508103 (1970-04-01), Young
patent: 3646383 (1972-02-01), Jones et al.
patent: 3967153 (1976-06-01), Milke et al.
patent: 4079288 (1978-03-01), Maloney et al.
patent: 4117374 (1978-09-01), Witting
patent: 4234817 (1980-11-01), Teshima et al.
patent: 4245179 (1981-01-01), Buhrer
patent: 4266167 (1981-05-01), Proud et al.
patent: 4312028 (1982-01-01), Hamacher
patent: 4363998 (1982-12-01), Graff et al.
patent: 4549110 (1985-10-01), Berman et al.
patent: 4698547 (1987-10-01), Grossman et al.
patent: 4710679 (1987-12-01), Budinger et al.
patent: 4743799 (1988-05-01), Loy
patent: 4767965 (1988-08-01), Yamano et al.
patent: 4772819 (1988-09-01), Ridders
patent: 4803399 (1989-02-01), Ogawa et al.
patent: 4839555 (1989-06-01), O'Mahoney
patent: 4851734 (1989-07-01), Hamai et al.
patent: 4899080 (1990-02-01), Vriens et al.
patent: 4916352 (1990-04-01), Haim et al.
patent: 4916356 (1990-04-01), Ahern et al.
patent: 4916359 (1990-04-01), Jonsson
patent: 4920298 (1990-04-01), Hinotani et al.
patent: 5220249 (1993-06-01), Tsukada
Mercer et al., "Fluorescent backlights for LCDs," Information Display, Nov., pp. 8-13, 1989.
Sanyo Electric Co., Ltd., "Flat Fluorescent Lamp Specifications," dated before the date of applicant's invention.
Hinotani et al., "Flat Fluoresence Lamp for LCD Back-light," International Display Research Conference, 1988.

Affiliated with

Also associated with

Rating

Planar fluorescent lamp having a serpentine chamber and sidewall does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Planar fluorescent lamp having a serpentine chamber and sidewall, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Planar fluorescent lamp having a serpentine chamber and sidewall will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1775133