(0)H05B:3/3:

(0)H05B:3/3:

IPC6

SECTION H - ELECTRICITY

H05B

4/4

>>

H05B033/00 - H05B043/00

33

/

00

Electroluminescent light sources (discharge lamps H 01 J 61/00 to H 01 J 65/00; semi-conductor devices with at least one particular jump barrier or surface barrier adapted for light emission H 01 L 33/00; lasers H 01 S 3/00; compositions per se, see the relevant subclasses)

Sealing arrangements

Electrode terminals

Circuit arrangements not adapted to a particular application

Apparatus or processes specially adapted to the manufacture of electroluminescent light sources

Light sources with substantially two-dimensional radiating surfaces

characterised by the chemical or physical composition or the arrangement of the electroluminescent material

characterised by the nature or concentration of the activator

characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded

characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers

of metallic reflective layers (H 05 B 33/26 takes precedence)

characterised by the composition or arrangement of the conductive material used as an electrode

of translucent electrodes

Electric light sources using a combination of different types of light generation (combinations of dissimilar light sources F 21, H 01 J 61/96)

Circuit arrangements for electric light sources in general

Controlling (regulating voltage or current G 05 F)

Detecting lamp failure

Circuits providing for substitution of the light source in case of its failure

Circuit arrangements or apparatus for operating incandescent light sources and not adapted to a particular application

Switching-on, e.g. with predetermined rate of increase of lighting current

Controlling (regulating voltage or current G 05 F)

Switching arrangements, e.g. from series operation to parallel operation

by shifting phase of trigger voltage applied to gas-filled controlling tubes

in which the lamp is fed by pulses

Circuits providing for substitution of the light source in case of its failure

Circuit arrangements or apparatus for igniting or operating discharge lamps

Starting switches

heated by glow discharge

combined thermal and magnetic

Circuit arrangements

in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac (H 05 B 41/26 takes precedence)

having a starting switch

for lamps having an auxiliary starting electrode

having no starting switch

for lamps having an auxiliary starting electrode

for lamps not having an auxiliary starting electrode

for high-pressure lamps

for low-pressure lamps

using resonance circuitry

to eliminate stroboscopic effects, e.g. feeding two lamps with different phases

in which the lamp is fed by high-frequency ac (H 05 B 41/26 takes precedence)

in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc

using static converters

using semiconductor devices

in which the lamp is fed by pulses, e.g. flash lamp

for single flash operation

to provide a sequence of flashes

Controlling (regulating voltage or current G 05 F)

Controlling the intensity of light

using saturable magnetic devices

using semiconductor devices, e.g. thyristor

discontinuously

in two steps only

for providing special optical effects, e.g. progressive motion of light

Circuits providing for substitution in case of failure of the lamp

Circuit arrangements for light sources, not otherwise provided for (H 05 B 37/00 takes precedence)

for light sources using a charge of combustible material

>>

4