Electric lamp with RF-ID lampholder with integrated antenna
Publication Date: 2005-Nov-22
The IP.com Prior Art Database
New Lighting products are equipped with all kind of wireless systems. One of the new wireless connections that is used for identification is RF-ID. RF-ID's can be used to identify lamps, so the ballast knows what kind of lamp is connected to the ballast.
If the ballast knows the type of lamp it knows the exact parameter that is needed to drive the lamp in such a way that it will perform optimal. The ballast can also retrieve extra information out of the RF-ID tag to identify the color or light output spectrum of the lamp, that can be used in medical care lighting, like light therapy equipment.
The problem that appears is that the RF-ID tag is taped on the outside or mounted on the inside of the lamp. The RF-ID tag can be read by a special RF-ID reader that is mounted inside the ballast or inside the luminaire. The distance from the reader module to the RF-ID tag can vary depending on the used frequency between several centimeters up to 10 centimeter. To avoid that the RF-ID tag is blocking a part of the light output it will be mounted at the edge of the lamp (figure 1).
Figure 1: RF-ID tags placed at one or two sides of the lamp
The antenna of the reader module must be placed on the outside the metal ballast and outside the metal luminaire to have an "open" view to the RF-ID tag. This needs a special luminaire approach.
By adding a special module to the lamp holder with an integrated antenna in it, the lamp RF-ID tag can be easily read...