US 2003/0151350 A1 · Cold cathode type fluorescent lamp

Abstract

Disclosed is a cold cathode type fluorescent lamp operated with a low voltage while it has a greatly increased life. The cold cathode type fluorescent lamp has a fluorescent tube including a fluorescent material formed thereon. A discharge gas includes vapors of mercury and an inert gas by a ratio of approximately 1:0.6 to 1:2.0. A first base and a second base are installed at both end portions of the fluorescent tube. A first electrode is disposed in the fluorescent tube, and a second electrode is disposed in the fluorescent tube. A first electron-emitting member is fixed on the first electrode, and a second electron-emitting member is fixed on the second electrode. The cold cathode type fluorescent lamp can instantaneously operate without preheating the electrodes, and cold cathode type fluorescent lamp can have greatly increased life because the cold cathode type fluorescent lamp can continuously operate when the electron-emitting members are broken. Also, the cold cathode type fluorescent lamp can be employed for various purposes like a traffic lamp or a street lamp because the cold cathode type fluorescent lamp has the sufficient luminous intensity.

Claims21

Dependent claims

A cold cathode type fluorescent lamp comprising:

a fluorescent tube wherein a fluorescent material is formed on an inside of the fluorescent tube;
a discharge gas filled in the fluorescent tube;
a first and a second bases installed at both end portions of the fluorescent tube, respectively;
a first electrode disposed in the fluorescent tube wherein the first electrode is adjacent to the first base;
a second electrode disposed in the fluorescent tube wherein the second electrode is adjacent to the second base;
a first electron-emitting means fixed on the first electrode;
and
a second electron-emitting means fixed on the second electrode.

5 more elements

A cold cathode type compact fluorescent lamp comprising:

a base including a housing having a first portion to which a socket is coupled, and a plate connected to a second portion of the housing;
a ballast installed in the housing;
at least one fluorescent tube installed on the plate wherein a fluorescent material is formed on an inside of the fluorescent tube;
a discharge gas filled in the fluorescent tube;
a first electrode disposed in a first portion of the fluorescent tube wherein the first electrode is adjacent to a first portion of the base;
a second electrode disposed in a second portion of the fluorescent tube wherein the second electrode is adjacent to a second portion of the base;
a first electron-emitting means fixed on the first electrode;
and
a second electron-emitting means fixed on the second electrode.

6 more elements

Dependencies are inferred from the claim text.

Cold cathode type fluorescent lamp

Life of this patent

Cold cathode type fluorescent lamp

Life of this patent

Abstract

Claims21