Stanley Electric Co., Ltd

Stanley Electronics Co., Ltd.

Tomohiko Sakamoto

Masanobu Aizawa

Masalu Ito

Tsuneyoshi Shibasaki

Masatosi Chiba

Mitugi Tayama

Thuneyosi Sibasaki

A neon discharge lamp provided with a powder coating with an appropriate particle size of used powder, is applied on an inner surface of a tubular bulb to the extent nearly equal to or more the length of an electrode portion, along the longitudinal axis of said tubular bulb. The phenomenon of neon gas being encompassed by way of cathode sputtering is prevented and the shortened operating life of the neon discharge lamp of this kind by way of cathode sputtering is also prevented.

Neon discharge lamp with powder coating

A power-saving discharge lamp 1 wherein gap control material 6 is provided in a clearance between an internal bulb 2 and an external bulb 5, having a smaller thickness than the dimension of the clearance. Nonuniformity of the clearance between the both bulbs caused by difficulties in supporting the internal bulb 2 while welding the external bulb 5 is eliminated and a suitable clearance is automatically provided by the gap control material 6 to prevent degradation of the heat insulation effect.

Power-saving discharge lamp

A cold-cathode fluorescent lamp includes an opposing pair of electrodes in spaced relationship in a tubular glass bulb of which the inner wall surface is coated with fluorescent material, and each of the electrodes is divided into four plate-like electrode members each having mercury and getter preliminarily coated thereon while maintaining a necessary area for each electrode without any contact with the inner wall surface of the tubular glass bulb. The opposite ends of the tubular glass bulb are airtightly sealed with beads through which electricity feeding wires extend for feeding electricity to the electrodes while holding the electrodes in the tubular glass bulb. Two of the four plate-like electrode members are located on one side of each electricity feeding wire, while another two of the same are located on the opposite side of the same. The respective plate-like electrode members are spot-welded to each electricity feeding wire. With this construction, the length of each electrode as measured in the axial direction of the tubular glass bulb can be shortened, and moreover, the length of a non-illuminating part of the cold-cathode fluorescent lamp can also be shortened. Consequently, the whole length of the foregoing type of cold-cathode fluorescent lamp can be shortened. Each of the electricity feeding wires may fully be composed of a Dumet wire.

Cold-cathode fluorescent lamp

Growing community of inventors

Iwaki, Japan

Tomohiko Sakamoto