The following light sources per se:

Light sources that emit light by effects other than thermal radiation and that do not use electric power for the generation of light, for example chemoluminescent, triboluminescent or thermoluminescent light sources.

Chemoluminescent light sources activated by an electric field.

This group covers light sources per se. The application or incorporation of light sources in lighting devices or systems is covered by subclasses for lighting devices or systems. The structural combination of light sources or lighting devices with other articles is covered by the places for those articles or, if no such place exists, in F21V 33/00.

In this group, it is desirable to add the indexing codes of subclasses F21W and F21Y.

Light sources, for example illuminating flash devices, in which light is generated by charges of explosive or combustible materials.

This group covers light sources per se. The application or incorporation of light sources in lighting devices or systems is covered by subclasses for lighting devices or systems. The structural combination of light sources or lighting devices with other articles is covered by the places for those articles or, if no such place exists, in F21V 33/00.

In this group, it is desirable to add the indexing codes of subclasses F21W and F21Y.

Illustrative examples of subject matter classified in this place:

LED lamps

LED modules

This group covers light sources using semiconductor devices as light-generating elements per se. Lighting devices or systems in which those light sources are installed are covered by subclass F21L or F21S.

When classifying in this group, subject matter also relating to the subclass F21V is further classified in that subclass whenever appropriate. F21V is a function oriented place whereas this group is an application place.

Attention is drawn to subclass H05B that covers electrical aspects of the same technical subjects that are covered by class F21.

Details of housings or cases, i.e. the parts between the light-generating element and the bases, of retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

Arrangement of components within housings or cases of retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

Illustrative examples of subject matter classified in this group, see figures below:

Figure 1. A cylindrical housing 10 has a first component unit 50 and a second component unit 70 therein. The housing 10 has therein a guide member 80 that is elongated in a direction from one-end 10a side of the housing 10 to the other-end 10b side thereof. The first and second component units respectively comprise notch sections 57, 75 that are different in shape and size from each other, and the first and second component units, when inserted in the housing 10 from the one-end 10a side, are movable along the guide member 80 in a state wherein the guide member 80 is positioned in the notch sections.

Figure 2. A cylindrical housing 16 is interposed between the heat dissipater 12 and the cap 17 and is flexible so that the heat dissipater 12 is tiltable relative to the cap 17.

When classifying in this group, subject matter also relating to the group F21V 15/01 is further classified in that group whenever appropriate.F21V 15/01 is a function oriented place whereas this group is an application place.

Arrangement or mounting of circuit elements integrated in the retrofit light source for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings.

Illustrative example of subject matter classified in this group, see figure below:

A circuit unit 50 has a circuit board 51 to which a plurality of electronic components 52 are mounted. The circuit unit 50 is housed in a case 70 in a manner such that the circuit board 51 is along the inner peripheral surface of the case 70.

When classifying in this group, subject matter also relating to the main group F21V 23/00 is further classified in that main group whenever appropriate. F21V 23/00 is a function oriented place whereas this group is an application place.

Illustrative examples of subject matter classified in this group, see figures below:

Figure 1. cap, and Figure 2. cap.

Arrangement or mounting of circuit elements integrated in the retrofit light source for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes

Illustrative examples of subject matter classified in this group, see figures below:

A power supply board 102 having a power supply circuit 106 for supplying lighting-up power to the LED, an insulating inner 103 for surrounding the power supply board, and a metallic heat sink 104 for improving heat radiation performance of the power supply board. The power supply circuit 106 is electrically connected to the heat sink through a common wire 107.

When classifying in this group, subject matter also relating to the main group F21V 23/00 is further classified in that main group when ever appropriate. F21V 23/00 is a function oriented place whereas this group is an application place.

Light sources that are not provided for elsewhere in the CPC.

This group covers light sources per se. The application or incorporation of light sources in lighting devices or systems is covered by subclasses for lighting devices or systems. The structural combination of light sources or lighting devices with other articles is covered by the places for those articles or, if no such place exists, in F21V 33/00.

In this group, it is desirable to add the indexing codes of subclasses F21W and F21Y.

If the disclosure gives no indication as to whether it relates to electrical means or not, it should be classified as if it were in fact electric.