Circuit board comprising at least one fold

Patent metadata

Field	Value
Publication number	US-2016088721-A1
Application number	US-201414888789-A
Country	US
Kind code	A1
Filing date	Apr 30, 2014
Priority date	May 3, 2013
Publication date	Mar 24, 2016
Grant date	—

Abstract

A circuit board ( 10 ) for carrying at least one light source ( 16 ) of a lighting device and a method of manufacturing such a circuit board are provided. The circuit board comprises a substrate ( 1 ), wherein the substrate comprises at least one fold ( 9 ) forming a projecting portion and extending from a periphery ( 3 ) of the substrate up to an inner portion ( 2 ) of the substrate, whereby the substrate has a polygonal funnel shape. The present aspects use the concept of folding the substrate in order to obtain a polygonal funnel shape of the circuit board, whereby shaping of the substrate without requiring removal of material of the substrate is allowed.

First claim

1 . A circuit board for carrying at least one light source of a lighting device,
the circuit board comprising a substrate, wherein the substrate comprises at least one fold forming a projecting portion and extending from a periphery of the substrate up to an inner portion of the substrate, and whereby the substrate has a polygonal funnel shape.

2 . The circuit board as defined in claim 1 , wherein the at least one fold comprises at least one folding line and two portions of the substrate located on opposite sides of the folding line.

3 . The circuit board as defined in claim 2 , wherein an angle between said two portions of the substrate is comprised within an interval of 0 to 90°.

4 . The circuit board as defined in claim 2 , wherein said two portions at least partially about each other.

5 . The circuit board as defined in claim 1 , wherein the at least one fold comprises at least two folding lines extending from separate points of the periphery of the substrate towards a common point.

6 . The circuit board as defined in claim 1 , wherein depth (D) of the at least one fold increases in direction from the inner portion of the substrate towards the periphery of the substrate.

7 . The circuit boa rd as defined in claim 1 , wherein the substrate has a polygonal shape, and
wherein the at least one fold extends from a corner of the polygonal shape and up to said inner portion of the substrate.

8 . The circuit board as defined in 1 , wherein the at least one fold projects inwards in the polygonal funnel shape.

9 . The circuit board as defined in claim 1 , wherein the at least one fold is arranged to dissipate heat generated by the at least one light source.

10 . The circuit board as defined in claim 1 , wherein the substrate comprises a material having a thermal conductivity of at least 1 W/(mK), such as metal.

11 . The circuit board as defined in claim 1 , further comprising a reflective surface arranged at the substrate so as to reflect light emitted by the at least one light source.

12 . The circuit board as defined in claim 1 , further comprising a reflective solder resist arranged so as to reflect light emitted by the at least one light source.

13 . The circuit board as defined in claim 1 , further comprising a spring extending at least partially around the circumference of the polygonal funnel shape of the substrate so as to support the substrate in the polygonal funnel shape.

14 . A lighting device comprising:
a circuit board as defined in claim 1 , and at least one light source coupled to the circuit board.

15 . A method of manufacturing a circuit board for carrying at least one light source of a lighting device, the method comprising:
providing a substrate, and folding the substrate so as to form at least one fold forming a projecting portion and extending from a periphery of the substrate up to an inner portion of the substrate, whereby the substrate obtains a polygonal funnel shape.

16 . The circuit board as defined in claim 1 , wherein the at least one fold forms discontinuities within the substrate.

Assignees

• Koninkl Philips Nv

Inventors

• Sepkhanov Ruslan Akhmedovich
• De Zwart Siebe Tjerk
• Weekamp Johannes Wilhelmus
• Rebergen Johannes Alexander
• Buijs Arnold

Classifications

• H05K1/028 Primary

  Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence) · CPC title

• F21V7/0058

  adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources · CPC title

• H05K2201/055

  Folded back on itself · CPC title

• H05K1/0277

  Bendability or stretchability details (H05K1/038, H05K3/4691 take precedence) · CPC title

• F21S8/02

  of recess-mounted type, e.g. downlighters (specially adapted for vehicle exteriors F21S41/00-F21S45/00) · CPC title