METHOD FOR MANUFACTURING LIGHT-EMITTING DIODE LIGHT BAR

• US 20140173886A1
• Filed: 08/30/2013
• Published: 06/26/2014
• Est. Priority Date: 12/25/2012
• Status: Abandoned Application

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: LAI, CHIH-CHEN
• Application Number:
  US14/014,432
• Publication Number:
  US 20140173886A1
• Time in Patent Office: Days
• US Class Current: 29/593
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 13/0409 Sucking devices
• CPC Class Codes: H05K 13/046 Surface mounting surface mounted components H05K3/341
• CPC Class Codes: H05K 13/082 Integration of non-optical monitoring devices, i.e. using non-optical inspection means, e.g. electrical means, mechanical means or X-rays
• CPC Class Codes: H05K 2203/166 Alignment or registration; Control of registration
• CPC Class Codes: H05K 3/303 Surface mounted components, e.g. affixing before soldering, aligning means, spacing means H05K3/32 takes precedence
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49004 including measuring or testing of device or component part

Abstract

A method for manufacturing an LED light bar includes steps: a nozzle picks up LEDs pending to be mounted; the electrical parameters of the LEDs detected by the nozzle are stored in a database; then, the nozzle disposes the LED on a substrate; the above steps are repeated until a plurality of LED branches are mounted on the substrate; then, differences of the electrical parameters of the LED branches are calculated according to the electrical parameters in the database; the positions of the LEDs of the LED branches are adjusted to make the electrical parameters of the LED branches equal.

Claims

1. A method for manufacturing an LED light bar, comprising steps of:

picking up LEDs pending to be mounted by a nozzle, meanwhile detecting electrical parameters of the LED by the nozzle and storing the electrical parameters of the LED in a database;

disposing the LED on a substrate by the nozzle;

repeating the above steps until a plurality of LED branches are mounted on the substrate;

calculating differences of the electrical parameters of the LED branches according of the electrical parameters stored in the database; and

adjusting positions of the LEDs of the LED branches to make the electrical parameters of the LED branches equal.

2. The method as claimed in claim 1, wherein adjusting the positions of the LEDs of branches is following an order of adjusting the LEDs with bigger difference of electrical parameters before adjusting the LED branches with smaller difference of electrical parameters.

3. The method as claimed in claim 1, wherein the electrical parameters of each LED branches are the total voltage value of each LED branches.

4. The method as claimed in claim 1, wherein each LED branches are parallel connecting, and the LEDs of each LED branches are connected in series.

5. The method as claimed in claim 4, wherein the nozzle comprises a first electrode, a second electrode, and at least one insulating tape which separates from the first electrode and the second electrode;

when the nozzle picks up the LEDs pending to be mounted, the first electrode and the second electrode contact the LEDs, supply power to the LEDs; and

detect the electrical parameters of the LEDs when lighting by the first electrode and the second electrode.

6. The method as claimed in claim 5, wherein the first electrode, the second electrode and the insulating tape of the nozzle cooperatively form a rectangular frame.

7. The method as claimed in claim 6, wherein the nozzle comprises a terminal end which clips the LEDs pending to be mounted and a top end which is away from the terminal end;

and the nozzle further comprises an optical detector located on the top end of the nozzle.

8. The method as claimed in claim 7, wherein the optical detector has a detecting surface facing the LED.

9. The method as claimed in claim 5, wherein the nozzle has a vacuum part, by suction of the vacuum part, the nozzle picking up the LEDs pending to he mounted.

10. The method as claimed in claim 9, wherein the vacuum part locates in the rectangular frame which is defined by the first electrode, the second electrode and the insulating tape.