Wide-area lamp

• US 4,975,814 A
• Filed: 08/08/1989
• Issued: 12/04/1990
• Est. Priority Date: 08/10/1988
• Status: Expired due to Fees

• Current Assignee: Telefunken Electronic GmbH
• Original Assignee: Telefunken Electronic GmbH
• Inventors: Schairer, Werner
• Primary Examiner(s): Husar, Stephen F.
• Application Number:
  US07/390,817
• Time in Patent Office: 483 Days
• Field of Search: 362/61, 362/97, 362/227, 362/235, 362/249, 362/240, 362/238, 362/241, 362/245, 362/800
• US Class Current: 362/240
• CPC Class Codes: B60Q 1/2696 Mounting of devices using LEDs
• CPC Class Codes: F21S 41/143 the main emission direction of the LED being parallel to the optical axis of the illuminating device
• CPC Class Codes: F21S 41/153 arranged in a matrix
• CPC Class Codes: F21S 41/322 the reflector using total internal reflection
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2109/00 Light sources with light-generating elements disposed on transparent or translucent supports or substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

The invention relates to a wide-area lamp and consists of a transparent mounting plate with conducting path structure on which a large number of luminescent semiconductor elements connected to the conducting path structure are mounted in a wide-area spread. Each semiconductor element is surrounded by a reflector, with these reflectors being arranged on the mounting plate and reflecting through the mounting plate the light emitted by the semiconductor elements.

Claims

1. A wide-area lamp, wherein a transparent mounting plate with conducting path structure is provided, on which a large number of luminescent semiconductor elements connected to said conducting path structure are mounted in a wide-area spread, and wherein each semiconductor element is surrounded by a reflector that reflects through said mounting plate the light emitted by said semiconductor element and hitting said reflector.

2. A wide-area lamp according to claim 1, wherein the reflectors are evenly distributed over the mounting plate.

3. A wide-area lamp according to claim 1, wherein the reflectors are placed closely adjacent in order to optimally exploit the space available on the mounting plate.

4. A wide-area lamp according to claim 1, wherein each semiconductor element is embedded in a plastic element on the underside of the transparent mounting plate.

5. A wide-area lamp according to claim 4, wherein the outer faces of the plastic elements are designed high-reflective.

6. a wide-area lamp according to claim 4, wherein the plastic elements are surrounded by a casting mold whose inside forms the reflectors.

7. A wide-area lamp according to claim 4, wherein the refractive index of the plastic element is approximately that of the transparent mounting plate.

8. A wide-area lamp according to claim 1, wherein the semiconductor elements are arranged on the underside of the transparent mounting plate and are surrounded by a shaped element whose inside forms the reflectors and wherein there is air between the plastic element and said shaped element.

9. A wide-area lamp according to claim 1, wherein the reflectors designed in parabolic form with a semiconductor element arranged in each case in the focal point of a reflector.

10. A wide-area lamp according to claim 1, wherein additional reflectors are arranged on the upper side of the transparent mounting plate that have the shape of a truncated parabola and together with the reflectors on the underside of the mounting plate have the structure of a paraboloid.

11. A wide-area lamp according to claim 10, wherein the additional reflectors on the upper side of the transparent mounting plate are designed as plastic elements whose outer surfaces are highly reflective.

12. A wide-area lamp according to claim 11, wherein the refractive index of the plastic element is approximately that of the transparent mounting plate.

13. A wide-area lamp according to claim 10, wherein the additional reflectors on the upper side of the transparent mounting plate are designed hollow by means of a shaped element, the inside of the hollow form being highly reflective.

14. A wide-area lamp according to claim 1, wherein the semiconductor elements are connected in parallel and/or in series on the transparent mounting plate by means of the conducting path structure.

15. The use of a wide-area lamp according to claim 1 for automobile lights, signal lights, side lights or traffic lights.