CN103899964A

CN103899964A - Method for manufacturing LED light bar

Info

Publication number: CN103899964A
Application number: CN201210569190.XA
Authority: CN
Inventors: 赖志成
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2012-12-25
Filing date: 2012-12-25
Publication date: 2014-07-02

Abstract

The invention discloses a method for manufacturing an LED light bar. The method comprises the steps that an LED to be pasted is picked up through a suction nozzle, and electrical parameters of the LED are detected and are stored in a database when the suction nozzle picks up the LED; the LED is pasted on a substrate through the suction nozzle; the steps are repeatedly carried out until a plurality of LED branches are pasted on the substrate; the difference of the electrical parameters among the LED branches is calculated according to all LED electrical parameters stored in the database; the positions of LEDs on the LED branches are adjusted according to the difference to enable the electrical parameters of the LED branches to be kept consistent. According to the method, the electrical parameters of the LEDs are detected while the suction nozzle picks up the LEDs to be pasted, and the electrical parameters are stored in the database. After pasting, the electrical parameters of the LED branches can be kept consistent by easily calculating the electrical parameters in the database and adjusting the positions of the LEDs on the LED branches, and additional consumption is avoided.

Description

LED lamp bar preparation method

Technical field

The present invention relates to a kind of lamp manufacturing method, especially a kind of LED lamp bar preparation method.

Background technology

LED(Light-Emitting Diode, light emitting diode) industry is one of industry attracting most attention in recent years, be developed so far, that LED product has had is energy-conservation, power saving, high efficiency, the reaction time is fast, the life cycle time is long and not mercurous, have the advantages such as environmental benefit, has been used on lighting use.LED lamp bar, on processing procedure, generally adopts chip mounter that LED is mounted on to strip substrate surface to form the LED lamp bar with multiple LED.In LED lamp bar, often comprise the branch road of multiple parallel connections, on each branch road, comprise the LED of multiple series connection.

As shown in Figure 1, lamp articles 100 comprises and drives chip 10 and draw the first branch road 11, the second branch road 12 and the 3rd branch road 13 parallel with one another from drive chip 10.Each branch road 11,12,13 is made up of the LED110,120,130 of 10 series connection respectively.In perfect condition, each LED110,120 on each branch road 11,12,13,130 characteristic are all the same.So the feedback voltage that the electric current of exporting from the output 101 of driving chip 10 is got back to driving chip 10 through these three branch roads 11,12,13 in parallel should be identical.But the voltage error of actual LED original paper itself can be at 2.8-3.2V(volt) between drift.So 11,12,13 pairs of these three branch roads drive the feedback voltage of chip 10 not identical.For example, each LED110 of the first branch road 11 is 2.8V, and each LED120 of the second branch road 12 is 3.2V.So, the maximum 4V that just can reach of the voltage error of the first branch road 11 and the second branch road 12.Due to three branch roads the 11,12, the 13rd, be connected in parallel again, in the situation that output 110 is consistent, the voltage of output 110 can, take maximum voltage as main, that is to say 32V.But in the time that output 110 is exported the voltage of 32V, the feedback voltage of the second branch road 12 is 0V, the first branch road 11 but must additionally bear 4V.Suppose that the electric current in circuit is 1A(ampere), 4W(watt) power just must be by driving chip itself absorption.The extra consumption of calculating again upper the 3rd branch road 13, drives chip 10 will bear more excess power.In this, lamp bar 100 losses of situation are too large, can not meet the developing direction of current energy-conserving and environment-protective.

Summary of the invention

In view of this, be necessary to provide a kind of energy-saving LED lamp bar preparation method.

A kind of LED lamp bar preparation method, comprises step: adopt suction nozzle to pick up LED to be mounted, suction nozzle detects the electrical parameter of LED simultaneously and electrical parameter is stored in data bank in the process of picking up LED; Suction nozzle is sticked LED on substrate; Repeat above-mentioned steps until mount the multiple LED branch roads of formation on substrate; Calculate the difference of the electrical parameter between each LED branch road by being stored in each LED electrical parameter in data bank; According to the LED position on the each LED branch road of discrepancy adjustment, the electrical parameter between each LED branch road is consistent.

Than the preparation method of traditional LED lamp bar, because the present invention detects the electrical parameter of LED in adopting suction nozzle to pick up LED to be mounted, and this electrical parameter is stored to.After having mounted, can calculate and adjust the LED position on each LED branch road by the electrical parameter in data bank simply, electrical parameter between each LED branch road is consistent, and the voltage of each branch road of LED lamp bar reaches poised state, avoids due to the unequal extra consumption of voltage.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of LED lamp bar.

Fig. 2 is the generalized section of the chip mounter that uses in LED lamp bar preparation method of the present invention.

Fig. 3 is the top view of the chip mounter that uses in LED lamp bar preparation method of the present invention.

Fig. 4 is the schematic diagram of the checking procedure of LED lamp bar preparation method of the present invention.

Fig. 5 is the schematic diagram of the paster step of LED lamp bar preparation method of the present invention.

Fig. 6 is the flow chart of LED lamp bar preparation method of the present invention.

Main element symbol description

100	Lamp bar
		10	Drive chip
101	Output
		11	The first branch road
110、120、130、40	LED
		12	The second branch road
13	The 3rd branch road
		200	Chip mounter
20	Suction nozzle
		21	The first electrode
22	The second electrode
		23	Insulating tape
24	Vacuum
		30	Fluorescence detector
31	Detection faces
		41、42	Electrode
43	Exiting surface
		50	Substrate

The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.

The specific embodiment

Below with reference to the drawings, the present invention is described in further detail.

Please refer to Fig. 2 and Fig. 3, show the schematic diagram of two angles of the chip mounter 200 using in LED lamp bar preparation method of the present invention.

This chip mounter 200 comprises a suction nozzle 20 and a fluorescence detector 30.From the depression angle of Fig. 3, this suction nozzle 20 is one or four frame type structures, and it comprises one first electrode 21, one second electrode 22 and two insulating tapes 23.This first electrode 21 is distributed in the opposite end of this four frame type with this second electrode 22, and connects its head and the tail by this two insulating tape 23 and form four frame types of seeing from depression angle.Enclose and form a vacuum 24 being positioned in the middle of this suction nozzle 20 by this first electrode 21, the second electrode 22 and two insulating tapes 23.The insulating cylinder that this suction nozzle 20 also can be formed in one, the be sticked conducting strip of two separation of its corresponding both sides, inner side, for example sheet metal, as this first electrode 21 and the second electrode 22.This vacuum 24 can utilize its vacuum state to produce a suction, for drawing LED40 to be mounted.Understandably, this suction nozzle 20 also can be designed to fixture, the first electrode 21 and the second electrode 22 are pivot joint or are movably connected on by other means on two insulating tapes 23, by the sandwiched LED40 to be mounted that relatively moves of this first electrode 21, the second electrode 22.This first electrode 21 and the second electrode 22 are made up of conductive material.In the present embodiment, this first electrode 21 and the second electrode 22 are made up of copper surface gilding, can effectively strengthen conduction quality.Fluorescence detector 30 is connected with this suction nozzle 20, and it is positioned at the top of this vacuum 24, between this first electrode 21, the second electrode 22 and two insulating tapes 23.This fluorescence detector 30 is attached on insulating tape 23, and is electrically connected with this first electrode 21, the second electrode 22 by wire or other modes.This fluorescence detector 30 is its detection faces 31 towards the surface of this vacuum 24, and, in the time that light is injected into this detection faces 31, this fluorescence detector 30 detects incident ray.This fluorescence detector 30 can be arranged to detect the optical parametric such as brightness and wavelength of incident ray as required.If desired more high-precision optical detection, also can be connected to this fluorescence detector 30 on spectrometer, to make wavelength analysis by optical fiber or other modes.

Referring again to Fig. 4-6, the method for utilizing the chip mounter 200 of the above-mentioned LED of having optical detection function to make LED lamp bar 100 comprises step: be first placed in the LED 40 on bin by suction nozzle 20 absorption; Light LED 40, then detect the electrical parameter of LED 40 by first and

second electrode

21,22, and LED 40 electrical parameters that detect gained are stored in data bank; Again LED 40 is sticked on substrate 50; On substrate 50, be sticked after a lot of LED 40 and form many LED branch roads in parallel according to default mode; Calculate the magnitude of voltage on each branch road according to the electrical parameter of the each LED 40 storing in data bank again; Judge the magnitude of voltage difference of each branch road and calculate the optimum LED position of each branch road according to difference, then adjust the LED position of each branch road according to result of calculation, finally make the magnitude of voltage of each branch road identical.Wherein, the electrical parameter of storage LED 40, the optimum LED position of calculating the magnitude of voltage of each branch road and calculating each branch road all can adopt information processors such as central processing unit and realize.Below the several steps in above-mentioned manufacture method are elaborated:

As shown in Figure 4, first, utilize the suction nozzle 20 of chip mounter 200 to draw by vacuum 24 or the end of gripping the first electrode 21 and the second electrode 22 is picked up LED40 to be mounted.Two

electrodes

41,42 of this LED40 are distributed in its two ends, bottom.LED 40 also comprises an exiting surface 43 upward.In the time of LED40 small volume, directly use vacsorb mode that LED40 is fixed to suction nozzle 20 ends, and two

electrodes

41,42 of this LED40 contact with the first electrode 21, second electrode 22 of suction nozzle 20, and the exiting surface 43 of this LED40 is towards the detection faces 31 of this fluorescence detector 30.LED40 is externally luminous after switching on power by the first electrode 21, second electrode 22 of suction nozzle 20, and the light of its transmitting enters the detection faces 31 of fluorescence detector 30, and this fluorescence detector 30 shows test results according to setting.Operating personnel can select or abandon this LED40 to be mounted according to test result, just can continue next step also can reach a certain result by this test result of program setting time.This first electrode 21, the second electrode 22 are inputted the electrical data of picked LED40 in information processor simultaneously, and information processor is further preserved the normal electrical data when luminous of this LED 40.The electrical data of each picked LED40 is all deposited to the data bank of information processor, and sets up each LED element electrical data storehouse.

As shown in Figure 5, provide a substrate 50, the LED40 testing by fluorescence detector 30 is mounted on this substrate 50.Repeat above-mentioned steps, until multiple LED40 are mounted on substrate 50, complete the operation that mounts of lamp bar 100 as shown in Figure 1.After the LED40 that treats each branch road mounts, in electrical data storehouse, there are the electrical data of the LED40 on each branch road, and add up according to the data in data bank the magnitude of voltage that obtains each branch road, then compare the error of each branch road.Calculate after error result, from electrical data storehouse, choose most suitable LED40, adjust LED40 with minimum displacement, make the voltage on each branch road reach or reach as far as possible the equal state of each branch road total voltage.Preferably, adjust the position of LED40 with voltage differences order from large to small.

Than the preparation method of traditional LED lamp bar 100, due to the present invention utilize chip mounter 200 on suction nozzle 20 with fluorescence detector 30, therefore mounting in process and can carry out optical detection to LED40, each LED40 that guarantees to be mounted on substrate 50 is operable.Utilize these chip mounter 200 grippings and mount LED40, can be in gripping process by the electrical data record of LED40 and set up the electrical data storehouse of each LED40.After having mounted, LED40 that can be suitable according to the data mobile in electrical data storehouse, makes the voltage of LED lamp bar 100 each branch roads reach poised state, avoids due to the unequal extra consumption of voltage.Again because this chip mounter 200 has measuring ability, LED40 is normal, and electrical data when luminous can be obtained in gripping process, need to be in extra measurement after mounting.

Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.

Claims

1. a LED lamp bar preparation method, comprises step:

Adopt suction nozzle to pick up LED to be mounted, suction nozzle detects the electrical parameter of LED simultaneously and electrical parameter is stored in data bank in the process of picking up LED;

Suction nozzle is sticked LED on substrate;

Repeat above-mentioned steps until mount the multiple LED branch roads of formation on substrate;

Calculate the difference of the electrical parameter between each LED branch road by being stored in each LED electrical parameter in data bank;

According to the LED position on the each LED branch road of discrepancy adjustment, the electrical parameter between each LED branch road is consistent.

2. LED lamp bar preparation method as claimed in claim 1, is characterized in that: the LED branch road LED branch road little prior to electrical parameter difference that electrical parameter difference is large is adjusted.

3. LED lamp bar preparation method as claimed in claim 1, is characterized in that: the electrical parameter of each LED branch road is the total voltage value of each LED branch road.

4. LED lamp bar preparation method as claimed in claim 1, is characterized in that: between each LED branch road, in parallel, the LED on each LED branch road is series connection.

5. LED lamp bar preparation method as claimed in claim 4, it is characterized in that: this suction nozzle comprises the first electrode, the second electrode and described the first electrode of isolation and the second electrode insulation band, in the time that this suction nozzle picks up LED to be mounted, this first electrode contacts with LED with this second electrode and is LED power supply, the electrical parameter when luminous by this first electrode, this LED of the second electrode detection.

6. LED lamp bar preparation method as claimed in claim 5, is characterized in that: the first electrode, the second electrode and the insulating tape of this suction nozzle enclose and be one or four frame types.

7. LED lamp bar preparation method as claimed in claim 6, is characterized in that: this suction nozzle forms the end of sandwiched LED to be mounted and the top away from this end, and suction nozzle also comprises the fluorescence detector on the top that is positioned at this suction nozzle.

8. LED lamp bar preparation method as claimed in claim 7, is characterized in that: this fluorescence detector is provided with detection faces towards the direction of this LED.

9. LED lamp bar preparation method as claimed in claim 5, is characterized in that: the inside of this suction nozzle has vacuum, and suction nozzle picks up LED to be mounted by the suction-operated of vacuum.

10. LED lamp bar preparation method as claimed in claim 9, is characterized in that: this vacuum is positioned at by this first electrode, the second electrode and insulating tape and encloses four frame types that form.