国民经济行业分类号：
C4350 | C3874 | C4090 | C3879
当前申请(专利权)人：
KONINKLIJKE PHILIPS ELECTRONICS N.V.
原始申请(专利权)人：
KONINKLIJKE PHILIPS ELECTRONICS N.V.
当前申请(专利权)人地址：
Groenewoudseweg 1,5621 BA Eindhoven,NL
发明人：
VAN DER POEL, LUCAS LEO DESIREE
摘要：
A transparent body comprising at least one embedded LED is disclosed. The embedded LED is arranged to provide a beam of light through the transparent body. The transparent body further comprises an optical device for controlling the beam angle and/or beam direction of at least a part of the light beam of the at least one embedded LED. The transparent body, provided with an optical device, allows improved illumination of entities displayed in, for example, showcases and counters.
技术问题语段：
Usage of halogen spots has the disadvantage that they produce much heat and UV load on the products, resulting in aging.|Furthermore, they may block the direct view of products when the halogen spot is positioned in the showcase.|Moreover, when halogen spots are used, it is almost impossible to illuminate the products without casting shadows.|When such spots are positioned outside the showcase or cabinet, they have the further disadvantage that the viewer can come between them and the showcase, thereby hindering the light beam from reaching the product in the showcase or cabinet.
技术功效语段：
It is an object of the present invention to provide an alternative transparent body having preferably improved illumination characteristics.
The present invention is based on the recognition that showcases and cabinets are commonly used in museums, galleries, shops and at home to display items. To improve visibility or attractiveness, the items in a showcase or cabinet are illuminated by means of halogen spots or Fiber Optics Lighting Systems. Usage of halogen spots has the disadvantage that they produce much heat and UV load on the products, resulting in aging. Furthermore, they may block the direct view of products when the halogen spot is positioned in the showcase. Moreover, when halogen spots are used, it is almost impossible to illuminate the products without casting shadows. When such spots are positioned outside the showcase or cabinet, they have the further disadvantage that the viewer can come between them and the showcase, thereby hindering the light beam from reaching the product in the showcase or cabinet. Illumination of the items by means of the transparent body according to the invention renders it possible to illuminate them with substantially no heat load and ultraviolet UV load on products. Furthermore, as the embedded LEDs are built in the showcase, the viewer cannot obstruct the light beam, while shadow-free light on products can be obtained when a plurality of LEDs is embedded. Bare LEDs produce a wide-angle light beam, and the optical device controls the light beam of the bare LED so as to obtain the desired illumination of the products in the showcase. The light beam can be focused by controlling the beam angle and the beam axis of the light beam can be directed to the product by controlling the beam direction. In this way, the halogen spot or FOLS can be replaced by a very compact LED.
The invention has the further advantage that maintenance costs can be reduced. A LED has a much longer lifetime than a halogen spot. The lifetime of a light source can be defined as the period of time in which the intensity of the light source in lumen decreases by 30%. Normally, a halogen spot has a lifetime of maximally 2000 hours, whereas a LED has a lifetime of 50,000 hours. The use of a LED in a showcase renders the showcase with respect to the light source almost free from maintenance. In an embodiment of the invention, the material of the transparent body is at least one of the materials selected from the group of glass, Plexiglas and plastic.
In an embodiment of the invention, the optical device is detachably mounted on the transparent body. This feature allows adaptation of the illumination conditions of the transparent body with the embedded LEDs when the content of the showcase or cabinet changes. This allows a reduction of costs for redecoration by reusing the relatively expensive transparent body with the embedded LEDs, and adaptation of the illumination conditions by mounting suitable optical devices. The optical devices can be glued or mounted on the transparent body by means of a two-sided adhesive tape.
In an embodiment of the invention, the optical device is embedded in the transparent body. This feature allows prevention of external damage to the optical device, such as scratches and pollution. In an embodiment, the optical device forms part of a foil. This feature decreases the time to provide the desired illumination characteristics to a transparent body. A dedicated foil with the desired illumination characteristics can be made automatically for the transparent body comprising the embedded LEDs. With the foil mounted on the body, each embedded LED will obtain the corresponding optical device. A further aspect of the invention relates to an optical device for use in combination with a transparent body with at least one embedded LED so as to obtain the transparent body as defined in any one of the claims.
权利要求：
CLAIMS:
1. A transparent body comprising at least one embedded LED, the embedded LED being arranged to provide a beam of light through the transparent body, further comprising an optical device for controlling the beam angle and/or beam direction of at least a part of the light beam of the at least one embedded LED.
2. A transparent body as claimed in claim 1, wherein the material of the transparent body is at least one of the materials glass, Plexiglas or plastic.
3. A transparent body as claimed in claim 1 or 2, wherein the transparent body comprises a plurality of aligned embedded LEDs, the optical device being arranged to control the light beams of the plurality of aligned embedded LEDs.
4. A transparent body as claimed in claim 1, 2 or 3, wherein the optical device is detachably mounted on the transparent body.
5. A transparent body as claimed in any one of claims 1 to 4, wherein the optical device is glued on the transparent body.
6. A transparent body as claimed in any one of claims 1 to 5, wherein the optical device is mounted on the transparent body by means of a two-sided adhesive tape.
7. A transparent body as claimed in any one of claims 1 to 6, wherein the optical device is a converging lens.
8. A transparent body as claimed in any one of claims 1 to 6, wherein the optical device is a diverging lens.
9. A transparent body as claimed in any one of claims 1 to 6, wherein the optical device is a reflector.
10. A transparent body as claimed in any one of claims 1 to 6, wherein the optical device comprises a lens and a reflector.
11. A transparent body as claimed in any one of claims 1 to 9, wherein the optical device is embedded in the transparent body.
12. A transparent body as claimed in any one of claims 1 to 11, wherein the optical device forms part of a foil.
13. A transparent body as claimed in claims 1 to 12, further comprising a first transparent layer, a second transparent layer, wherein the at least one embedded LED is embedded between the first and the second layer.
14. A lighting unit comprising the transparent body as claimed in any one of claims 1 to 13.
15. An arrangement for storing and illuminating at least one entity, such as a showcase, counter, or cabinet, comprising the transparent body as claimed in any one of claims 1 to 11.
16. An optical device for use in combination with a transparent body with at least one embedded LED so as to obtain the transparent body as claimed in any one of claims 1 to 11.
17. A sticker sheet comprising a plurality of optical devices for use in combination with a transparent body with at least one embedded LED so as to obtain the transparent body as claimed in any one of claims 1 to 13.