PRINTED CIRCUIT FOR FIVE LEDS IN SERIES

• US 20110103058A1
• Filed: 01/16/2006
• Published: 05/05/2011
• Est. Priority Date: 01/17/2005
• Status: Active Grant

• Current Assignee: Pierre-Alain Dumas
• Original Assignee: Pierre-Alain Dumas
• Inventors: Dumas, Pierre-Alain
• Granted Patent: US 8,246,201 B2
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: H05K 1/0209 External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence
• CPC Class Codes: H05K 2201/029 Woven fibrous reinforcement or textile textile substrates H05K1/038
• CPC Class Codes: H05K 2201/0293 Non-woven fibrous reinforcement
• CPC Class Codes: H05K 2201/062 Means for thermal insulation, e.g. for protection of parts
• CPC Class Codes: H05K 2201/09363 wherein only contours around conductors are removed for insulation
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 3/281 by means of a preformed insulating foil H05K3/284 takes precedence
• CPC Class Codes: H05K 3/3447 Lead-in-hole components H05K3/3415 takes precedence

Abstract

The invention relates to a specific printed circuit (7) comprising independent etched blocks (4) or segments in series of four such that, on a series circuit comprising five LEDs, the four blocks serve as the positioning and connection points for the welding of the pins of the LEDs, said pins being welded in an anode-to-cathode series, or the reverse depending on the direction of the current, i.e. eight electrodes in isolated blocks, such as to ensure that the connection is powered and the LEDs are fixed correctly in series of five. According to the invention, the square or rectangular blocks have a large surface (2) such that the successive holes do not tear the film of epoxy copper. In addition, said blocks are disposed along a path and a successive diagram (21) defines the symbol or pattern to be represented by the LEDs (12) which are disposed and aligned on the other decorated face of the epoxy. The incoming or outgoing bases, which supply the positive (20) or negative (3) power, or the opposite depending on the direction of the LEDs, can comprise the outgoing or incoming base that is common to other series, by means of suitable etching. The negative is always at the centre of the pattern. The circuit is divided into three connection zones, A, B, C, and is powered by external contact springs. The invention is intended for the series powering of a longilineal distribution of five LEDs in series, or a multiple thereof.

Claims

1. Printed circuit comprising several etched, mutually independent blocks or segments characterized in that the blocks or sites are arranged by series of four to connect five luminescent diodes (LEDs) in series forming a pattern, the four blocks being used of localization and connection for the welding of the leads of the LEDs.

2. Circuit according to claim number 1, characterized in that the leads of the LEDs traversing the epoxy are soldered head to foot on the side of the circuit, on four distinct and isolated blocks or sites.

3. Circuit according to claim number 2, characterized in that the first electrode of the first LED is of the sign opposite the last electrode of the last LED when the circuit is operating.

4. Circuit according to claim number 1, characterized in that the LEDs traverse the epoxy surface which is covered with baize, textile or painting.

5. Circuit according to claim number 1, characterized in that the total of the series connected LEDs always form a multiple of 5, even or odd.

6. Circuit according to claim number 1, characterized in that in a series having pattern whose total of the visible LEDs is not a multiple of 5, the last LED(s) forming the complete series of 5, is soldered straddled and in periphery of the circuit near the rabbet.

7. Circuit according to claim number 6, characterized in that the current inputs are situated in two exterior boundary zones, A and C.

8. Circuit according to claim number 7, characterized in that the exterior boundary zone A comprises a surface connection zone to the positive by a contact spring, near the pattern.

9. Circuit according to claim number 8, characterized in that the positive supplied by the upper part exterior boundary zone A is transferred towards a central zone B by a mechanical security thermal switch.

10. Circuit according to claim number 7, characterized in that the negative is supplied by a second contact spring on the part C in a contact zone of connection to the negative, which feeds it and distributes it to the center of the pattern.

11. Circuit according to claim number 9, characterized in that all exterior contour of the pattern is supplied and fed into positive by the central zone B.