CN110379726B

CN110379726B - Method for row-by-row COB-LED row test

Info

Publication number: CN110379726B
Application number: CN201910699906.XA
Authority: CN
Inventors: 黄海山; 赖小东
Original assignee: Xiamen Hualian Electronics Co Ltd
Current assignee: Xiamen Hualian Electronics Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2022-07-22
Anticipated expiration: 2039-07-31
Also published as: CN110379726A

Abstract

The invention relates to a method for testing a COB-LED (chip on Board-light emitting diode) array, which adopts an LED array testing machine to sequentially test each COB light source unit in the COB light source array, a plurality of compensators are additionally arranged on a test board jig of the LED array testing machine, the plurality of compensators enclose a space for placing the COB light source array, and the compensators can generate compensation effect on optical parameter results of the COB light source units on the peripheral side of the COB light source array so as to solve the problem that the testing deviation of edge products is larger in the existing COB-LED array testing process.

Description

Method for testing COB-LED row in row

Technical Field

The invention relates to the field of COB-LED testing, in particular to a method for testing COB-LED in a row.

Background

LED light sources (light emitting diodes) have gradually replaced traditional light sources to become the mainstream light sources of the next generation due to their advantages of high efficiency and long lifetime. Compared with a single-chip packaged LED light source device, COB (chip on board) can save the packaging cost, the manufacturing cost of a light engine module and the secondary light distribution cost of the device in the lighting application, and the COB light source module can effectively avoid the defects of light spots, glare and the like generated by the combination of discrete light source devices, so that COB-LEDs are increasingly used on high-power lighting devices.

In order to improve COB-LED production efficiency, some COB-LEDs in the prior art can be manufactured in a row mode, namely a plurality of COB light source units arranged in multiple rows and multiple columns are simultaneously produced on one substrate, and when the COB-LEDs in the row are tested, the COB light source units can be sequentially tested in a row testing mode directly so as to improve the testing efficiency. Under the row state of antithetical couplet, can receive other COB light source unit's around fluorescent glue influence in the COB light source unit testing process for the data of test and this COB light source unit's actual parameter differ, consequently need use fixed compensation to revise.

However, the COB light source units in the edge position and the middle position have a large difference in the degree of influence of the fluorescent glue of other COB light source units around, the middle COB light source unit is influenced by the fluorescent glue on four sides, and the edge position is influenced by only one side or two sides, which results in a large test deviation of the COB light source unit in the edge position. When the existing arraying and testing method is used for middle measurement, due to large deviation, repeated glue filling and retesting are needed, and the efficiency is reduced; when the existing arraying and measuring method is used for forming measurement, due to large deviation, when parameters of products at edge positions are critical, single retesting is needed to ensure the accuracy of light and color separation, and the production efficiency is reduced.

Disclosure of Invention

The invention aims to provide a method for testing a COB-LED row in a row, which aims to solve the problem that the test deviation of edge products is larger when the COB-LED row is tested in the prior art.

The specific scheme is as follows:

the method comprises the steps that an LED (light emitting diode) row testing machine is adopted to sequentially test each COB light source unit in COB light sources in the row, a plurality of compensators are additionally arranged on a test board jig of the LED row testing machine, a space for placing the COB light sources in the row is defined by the compensators, and the compensators can generate a compensation effect for optical parameter results of the COB light source units on the periphery side of the COB light sources in the row.

Further, the compensator is one of a COB light source unit product, a colored paper sheet, a colored adhesive tape, a colored plastic sheet, a colored ceramic sheet and a fluorescent adhesive film sheet.

Furthermore, ally oneself with row COB light source and be single or double row and ally oneself with row COB light source, the compensation thing is located and is ally oneself with on row COB light source length direction both sides.

Further, the compensator is a COB light source unit product.

Furthermore, the row of COB light sources is more than or equal to three rows of row COB light sources, and the compensator ring is located on the whole week side of row COB light sources.

Furthermore, the compensator is a fluorescent glue film, and the proportion of each fluorescent powder and the proportion of the glue in the fluorescent glue film are the same as the fluorescent packaging glue adopted by each COB light source unit in the parallel COB light source.

Furthermore, the thickness of the fluorescent glue film is the same as or approximately the same as the thickness of the fluorescent packaging glue of each COB light source unit in the row of COB light sources.

Compared with the prior art, the method for testing the COB-LED array in the row has the following advantages: according to the method for testing the COB-LED row of the row to be tested, the compensator is additionally arranged beside the COB-LED row to be tested, so that COB light source units positioned on the edge of the COB light source row and COB light source units positioned in the middle of the COB light source row can have the same or approximately same testing environment, and the deviation between the optical parameters obtained by testing each COB light source unit through the row testing machine and the actual optical parameters is the same or approximately the same, so that the COB light source row can be corrected through uniform compensation, the testing efficiency of the COB light source row can be guaranteed, and meanwhile, the accuracy of testing data can also be guaranteed.

Drawings

Fig. 1 shows a schematic diagram of a dual row of inline COB light sources.

Fig. 2 shows a schematic diagram of test compensation for a dual-row in-line COB light source.

Fig. 3 shows a schematic diagram of test compensation for three rows of COB light sources.

Detailed Description

To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1, the row of COB light sources in this embodiment is illustrated by taking an example that 12 COB light source units are arranged on a substrate in a manner of 6 × 2, and each circuit on the substrate in fig. 1 is regarded as a COB light source unit, but the LED chips and the fluorescent glue in the COB light source units are not shown. The numbers from left to right of the 6 COB light source units in the first row of 12 COB light source units in fig. 1 are sequentially 1, 2, 3, 4, 5, and 6, and the numbers from right to left of the 6 COB light source units in the second row are sequentially 7, 8, 9, 10, 11, and 12.

The existing testing steps for the COB light sources in the row are as follows: firstly, the whole version of the COB light source of the row is fixed on a jig of a test bench of the LED row test machine, and then the LED row test machine sequentially tests from No. 1 to No. 12 according to the numbering sequence to obtain corresponding optical parameters.

The COB-LED array test method provided by this embodiment adds a compensator capable of generating a compensation effect on an optical parameter result on the peripheral side of an array COB light source, where the compensator may be, for example, a COB light source unit product, a colored paper sheet, a colored adhesive tape, a colored plastic sheet, a colored ceramic sheet, a fluorescent adhesive film sheet, and the like, and can realize adjustment of a test result compensation amount by controlling the area and the thickness of the compensator, so that COB light source units located at the edge of the array COB light source can have the same or substantially the same test environment as COB light source units located in the middle.

Specifically, for the double-row or single-row gang COB light source, the compensators can be added only on the left and right sides of the gang COB light source. Referring to fig. 2, directly add COB light source unit product a that is the same with the COB light source unit in the gang COB light source that awaits measuring on the left and right both sides of gang COB light source like this embodiment in order to be regarded as the compensator to make all COB light source units on the gang COB light source all have roughly the same test environment, so that the deviation between the optical parameter that each COB light source unit obtained through the test of gang saw and the actual optical parameter is the same or roughly the same, consequently can revise through unified compensation volume, can guarantee the efficiency of the test of gang COB light source when guaranteeing, can also guarantee the accuracy of test data.

For the COB light sources in the row that exceeds the double row, only adding the compensators on the left and right sides of the COB light sources in the row cannot make all the COB light source units have substantially the same test environment, so, referring to fig. 3, the embodiment takes the COB light sources in the row with three rows as an example for explanation, and the compensators that are annularly arranged on the periphery of the COB light sources in the row are added on the jig of the test table of the LED array test machine.

The compensator in this embodiment is a phosphor-coated film B formed on a substrate, and the substrate is usually the same as the row COB light source, so as to reduce the deviation caused by different materials. For example, the row COB light source is ceramic substrate, the ceramic substrate of the same specification model is also selected for use to the base plate of fluorescence glued membrane, the thickness of the fluorescence glued membrane after the shaping is also the same or roughly the same with the thickness of the fluorescence encapsulation glue of each COB light source unit in the row COB light source, the proportion of each phosphor powder in the fluorescence glued membrane and the proportion of colloid all are the same with the fluorescence encapsulation glue that each COB light source unit adopted in the row COB light source, can discharge the deviation of raw materials, and also can directly adopt the fluorescence encapsulation glue of COB light source unit, need not additionally to join in marriage gluey. Therefore, the width of the fluorescent glue film is adjusted, so that all the COB light source units on the COB light sources in the row have the same and same test environment. So that the deviation between the optical parameter that each COB light source obtained through arranging the test of machine test and the actual optical parameter is the same or roughly the same, consequently can revise through unified compensation volume, can guarantee the efficiency of software testing of row COB light source simultaneously, can also guarantee the accuracy of test data.

As shown in fig. 1 and 2, in the present embodiment, a description is given by taking a double row of COB light sources as an example, and 12 COB light source units are arranged on a substrate in a 6 × 2 manner.

First, the optical parameters of each COB light source unit in the parallel row of COB light sources are tested in the LED arraying and testing machine in the conventional testing manner, that is, the COB light source units are tested without a compensator, and the color temperature of each COB light source unit is obtained (in the embodiment, the deviation of the optical parameters is described by the most intuitive color temperature). Then, under the same test conditions, after two identical COB light source unit products a (in the manner shown in fig. 2) are respectively added on the left side and the right side of the COB light sources in the row to serve as compensators, the optical parameters are tested in the LED row testing machine, and the color temperature of each COB light source unit is obtained. And finally, the parallel COB light sources are divided into single COB light source units, and the single COB light source units test the optical parameters of each single COB light source unit in an integrating sphere test system.

In this embodiment, the LED array tester adopts an ATmini-500 integrated package LED array tester of the soymen blue optical technology ltd, hangzhou, and the integrating sphere test system is an LTS-1500 photoelectric color integrated test system of the optical science ltd, monbillow (shanghai). The data shown in the following table were obtained via the test system test described above.

Δ 1 in the above table represents the difference between the color temperature measured by the LED array tester using the prior art (without compensation) and the color temperature measured by the integrating sphere test system after the COB light source unit of the serial number is divided into a single light source.

Δ 2 represents the difference between the color temperature measured by the LED array tester using the test method (with compensation) in the present embodiment and the color temperature measured by the integrating sphere test system after the COB light source unit of that number is divided into individual light sources.

It can be seen that, in the conventional testing method, when the COB light source units No. 1, No. 6, No. 7 and No. 12 on the left and right sides are compared with other COB light source units, the color temperature difference between the COB light source units with the same serial number and the single test of the COB light source units with the same serial number is smaller, and the color temperature difference between the other COB light source units and the single test of the COB light source units with the same serial number is larger. By adopting the testing method provided by the embodiment, the COB light source units of

numbers

1, 6, 7 and 12 are compared with COB light source units of other numbers, and the numerical values of the temperature differences of the colors are relatively uniform.

By calculating:

standard deviation σ 1 of Δ 1 ═ STDEV [ Δ 1(1:12) ] -73.61;

the standard deviation σ 2 of Δ 2 ═ STDEV [ Δ 2(1:12) ] -29.76.

Therefore, the COB-LED array testing method provided by this embodiment can enable each COB light source unit in the COB light source array to be closer in deviation between the measured optical parameter and the actual optical parameter when the COB light source unit is arranged, so that only the same specific compensation value needs to be compensated for all COB light source units, the actual optical parameter similar to the COB light source unit can be obtained, and the COB light source units located at the edge in the COB light source array need not to be individually tested, thereby improving the testing efficiency of the COB light source array, and simultaneously ensuring the accuracy of the optical parameter of each COB light source unit.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for testing COB-LED rows in a row adopts an LED row testing machine to test each COB light source unit in COB light sources in the row in sequence, and is characterized in that: a plurality of compensators are additionally arranged on a test board jig of the LED row testing machine, the compensators enclose a space for placing a COB light source of the row, the compensators can generate a compensation effect for a color temperature result of a COB light source unit on the periphery side of the COB light source of the row, and the compensators are one of colored paper sheets, colored adhesive tapes, colored plastic sheets, colored ceramic sheets and fluorescent adhesive films.

2. The method of claim 1, wherein: the row COB light source is single row or double row and is arranged COB light source, the compensation thing is located on row COB light source length direction both sides.

3. The method of claim 1, wherein: the row COB light source that allies oneself with is more than or equal to three rows's row COB light source, the compensator ring is located on the whole week side of row COB light source.

4. The method of claim 3, wherein: the compensator is a fluorescent glue film, and the proportion of each fluorescent powder and the proportion of the glue in the fluorescent glue film are the same as the proportion of the fluorescent packaging glue adopted by each COB light source unit in the parallel COB light source.

5. The method of claim 4, wherein: the thickness of fluorescence glued membrane is the same with the thickness of the fluorescence encapsulation of each COB light source unit in the row COB light source of ally oneself with.