LAMP WITH A TRANSLUCENT PLASTIC ELEMENT

• US 20140009929A1
• Filed: 02/01/2013
• Published: 01/09/2014
• Est. Priority Date: 02/02/2012
• Status: Active Grant

• Current Assignee: Flextronics Automotive GmbH & Co. KG (Flex, Ltd.)
• Original Assignee: Flextronics Automotive GmbH & Co. KG (Flex, Ltd.)
• Inventors: Wimbert, Frank, Hupfer, Philip
• Granted Patent: US 9,261,244 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]

Abstract

A lamp (11, 21, 61), in particular an LED lamp, has at least one light source (12, 62, 22) and at least one translucent plastic element (13, 23, 63) disposed in the beam path of the at least one lighting means (12, 22, 62). The lamp (24 14) is characterized in that the plastic element (13, 23, 63) comprises at least two plastic layers (13a, 13b; 23a, 23b, 64, 66a, 66b) from different translucent materials, said translucency (T1, T2) of the two plastic layers (13a, 13b; 23a, 23b, 64, 66a, 66b) having a different wavelength dependence such that the overall transmission function of at least one plastic member is changed in a desired manner (63 13, 23).

Claims

1. A lamp comprising:

an LED having at least one light source and at least one translucent plastic element disposed in a beam path of the at least one light source, wherein the plastic element comprises at least two plastic layers made from different translucent materials, the translucency T1 and T2 of the at least two plastic layers each having a different wavelength dependence, such that the at least one plastic element has a transmission function and an overall translucency, T, having a wavelength dependence, and such transmission function of the least one plastic member is altered in a desired manner.

2. The lamp according to claim 1, characterized in that the color shift of the light passing through the at least one plastic element is smaller than the color shift of the light passing through one of the at least two plastic layers.

3. The lamp according to claim 1, characterized in that the wavelength dependence of the translucency T of the plastic member is less than the wavelength dependence of the translucency T1 and T2 of each of the at least two plastic layers.

4. The lamp according to claim 1, characterized in that the translucency T1 and T2 of the at least two plastic layers have an opposite wavelength dependence.

5. The lamp according to claim 1, characterized in that the translucency of at least one of the at least two plastic layers has a stepped wavelength dependence.

6. The lamp according to claim 5, characterized in that the translucency T1 and T2 of two of two of the at least two plastic layers each have opposing stepped wavelength interdependence.

7. The lamp according to claim 1, characterized in that the translucency at least one of the at least two plastic layers has both a rising and a falling wavelength dependence.

8. The lamp according claim 1, characterized in that the wave function of the translucency (T) of the plastic element is in the visible range of less than ±

5%.

9. The lamp according to claim 1, characterized in that the plastic element with its at least two plastic layers is formed by an injection-molded more components.

10. The lamp according to claim 1, characterized in that the LED comprises a phosphorus converted LED.

11. The lamp according to claim 1, characterized in that the LED comprises an organic light emitting diode (OLED).

12. The lamp according to claim 1, characterized in that the at least one plastic layer comprises an outer layer that is one of white and gray.

13. The lamp according to claim 1, characterized in that at least one plastic layer comprises an outer layer, the outer layer having a thickness that is dependent on a distance from the outer layer to the at least one light source.

14. The lamp according to claim 13, characterized in that at least one plastic layer comprises an inner layer having a thickness that is dependent on one of:

the thickness of the outer layer and distance to the at least one light source.