KR101380700B1 - A test table with solar cells for light-emitting components and a test method thereof - Google Patents

Abstract

According to the present invention, for example, light emission measurement is performed on a light emitting diode chip, a light emitting diode element, or a light bar having a light emitting diode chip by a solar cell module, and the light emitting module is connected to the solar cell module using a mobile device. In this case, the solar cell module receives the light emitting state information of the light emitting module in order and transmits a detection signal by relatively moving along the longitudinal direction of the activated light emitting module. Provided is a light emitting device measuring apparatus and a measuring method including a simple and rapid solar cell module for measuring a defective device of a light emitting module by comparing this signal with standard light emitting state information.

Description

Light emitting device measuring apparatus and measuring method including solar cell module {A TEST TABLE WITH SOLAR CELLS FOR LIGHT-EMITTING COMPONENTS AND A TEST METHOD THEREOF}

The present invention relates to a light emitting element measuring apparatus and a measuring method, and more particularly, to a light emitting element measuring apparatus and a measuring method having a solar cell module.

In order to measure the total luminous flux of the light emitting device, the industry generally obtains the light energy emitted after the light emitting device is operated by an integrating sphere and analyzes the total luminous flux value of the light emitting device. As shown in FIG. 1, the integrating sphere 11 is connected to the spectral energy analyzer by an optical fiber, and further includes a light shielding plate 13 inside the integrating sphere 11, and the LED to be measured has an integrating sphere ( 11) It is located in the lower part of input part and the size of input part is input section area. One end opposite to the input of the integrating sphere 11 has an output located above it and the size of the output is the output cross-sectional area.

When the LED under measurement is activated and turned on brightly, light energy enters the integrating sphere 11 at the input portion, and is received and output at the output portion through the internal refraction of the integrating sphere 11, Delivered. Although a standard light source can be measured in the same environment to compare and contrast to obtain the total luminous flux of the LED under measurement, this measurement mode is relatively suitable for directional light sources. The integrating sphere 11 has a limitation in installation due to its size, and is usually used only in a laboratory, and it is also time-consuming to measure different measured LEDs while removing and removing a light source constantly. The manufacturing cost of the integrating sphere 11 is also small. .

Therefore, as shown in FIG. 2, in the all-beam flux measuring system, six solar cells are installed on the inner six sides of the light receiving device 20, and the output unit is an output point of the light receiving device 20, and the measured object to be measured is measured. The light bar is mounted in the mounting holder on the moving device and enters the light receiving device 20 in order through the opening 28. When the light bar under measurement is operated by the mounting holder and turned on brightly, the light energy of the light bar under measurement is directly received by the solar cell.

 Subsequently, the light energy of the light bar under measurement in the light receiving device 20 is transmitted through two branch paths, one path is transmitted to the processor through the transmission device, and the other path is transmitted to the spectral energy analyzer by the optical fiber. In addition, the spectral energy analyzer is transmitted to the processor through the transmission device, and the data of the two paths are combined to analyze the data in the processor to obtain the total luminous flux value of the light bar under measurement.

Compared with the integrating sphere system of FIG. 1, the structure of FIG. 2 is not only easy to obtain a solar cell, but also is inexpensive, easy to repair and check, and the light receiving device is arranged in order through the mounting holder of the mobile device. The operation into (20) significantly reduces the measurement time, and by combining the spectral energy analyzer and the processor, a more accurate total luminous flux value of the light bar under measurement can be obtained.

However, although the above-mentioned known technology only mentions the entire luminous flux, in the present invention, after fixing the light source to be measured at the sensing position, the solar cell can statically detect the goodness of the entire light source to be measured, as well as through dynamic brightness detection. In the case where the entire light source under test has a plurality of light emitting elements, it is possible to analyze in detail which of the plurality of light emitting elements has an error. That is, once a light emitting module is found to have a problem, it is necessary to check whether all light emitting devices of the light emitting module under test meet the measurement criteria without having to go through a separate step of determining where the light emitting device is located. This can be accurately identified, quickly identifying defective devices, and speeding up subsequent corrections, thereby improving the yield. In particular, this sorting is performed through the same automated work process, so that the measured light emitting module can be inspected in a large amount more quickly during the measurement process, which has a practical value, and solves the difficulty of a company that actually produces and measures the light emitting module. Is the best solution.

It is a first object of the present invention to provide a light emitting device measuring apparatus which detects quickly and clearly which of the plurality of light emitting devices in a light emitting module fail.

A second object of the present invention is to provide a light emitting device measuring device having a high degree of compatibility and retaining the original simple structure.

It is a third object of the present invention to provide a light emitting device measuring apparatus which is inexpensive and fully automated to reduce the test cost of a light emitting module.

It is a fourth object of the present invention to provide a light emitting device measuring method capable of quickly measuring which of the plurality of light emitting devices in a light emitting module is not required without repetitive installation and operation.

A fifth object of the present invention is to provide a light emitting device measuring apparatus having a solar cell module that has a small installation use space, high use efficiency, and directly increases the measurement competitiveness.

The light-emitting device batch measuring device provided with the solar cell module of the present invention includes a base for receiving a light-emitting module having a plurality of light-emitting elements under test and for operating the light-emitting elements to emit light; A mobile device which sequentially imports / exports a plurality of light emitting devices under measurement to the base; It includes a solar cell module comprising at least one solar cell.

In the measuring method using the apparatus, that is, the measuring method of the light emitting module having a plurality of light emitting elements, the light emitting elements of the light emitting modules are disposed along the length direction, and the light emitting state of the light emitting elements of the light emitting modules is measured by the measuring device. The measuring device includes a base; A solar cell module installed in the base and having a detection range capable of covering a plurality of light emitting devices, and detecting the light emission of the light emitting devices and converting the light into a detection signal and outputting the detected signal; And a moving device for moving the light emitting module relative to the solar cell module in a predetermined moving direction. This method includes the following steps. a) arranging the light emitting module in such a manner that the longitudinal direction of the light emitting module corresponds to a predetermined movement direction and operating the light emitting element of the light emitting module under measurement as a base to emit light; b) moving the light emitting module relative to the solar cell module in a predetermined movement direction by the moving device to cause the light emitting elements of the light emitting module under test to sequentially enter and / or leave the detection range of the solar cell module; And c) detecting a state in which the light emitting device enters and / or leaves the detection range by the solar cell module, and outputs a detection signal in which the amount of light emitted changes according to the state and time of the light emitting device within the detection range.

As described above, the present invention gradually increases or decreases the luminescence brightness obtained by sequentially sensing a plurality of light emitting elements in the light emitting module by entering / exiting a detection range in order. Based on the speed of departure, the location of the light emitting device in which the problem occurred can be estimated directly, so that the single measurement device can be immediately identified in the automated measurement process to further improve the production speed by accelerating the subsequent repair or processing process. The present invention provides a light emitting device measuring apparatus and a measuring method having a solar cell module which is more suitable for the demand not particularly limited by the length of the light emitting module under measurement.

1 is a schematic side view of a conventional light emitting device measuring apparatus.
2 is a perspective view showing a measurement system having a conventional solar cell light receiving device.
3 is a block diagram of a first embodiment of the present invention.
4 is a perspective view of a first embodiment of the present invention.
5 is a partial perspective view of the first embodiment of the present invention.
6 is a perspective view showing a measuring device of a second embodiment of the present invention.
7 is a cross-sectional view showing an operating state in which the light emitting module is in a preliminary position outside the detection range in the second embodiment of the present invention.
8 is a cross-sectional view illustrating an operating state in which a first light emitting device starts to enter a sensing range of a solar cell module in a second embodiment of the present invention.
FIG. 9 is a cross-sectional view illustrating an operating state in which a light emitting module is positioned at a complete sensing position within a sensing range of a solar cell module in a second exemplary embodiment of the present invention.
FIG. 10 is a cross-sectional view illustrating an operating state in which a last light emitting device is positioned at a pre-release position within a detection range of a solar cell module in a second embodiment of the present invention.
FIG. 11 is a cross-sectional view illustrating an operating state in which a light emitting module is positioned at a measurement completion position outside a detection range of a solar cell module in a second embodiment of the present invention.
FIG. 12 is a diagram illustrating an electrical state of a measuring process in which a good light emitting module is detected by a solar cell module in a second embodiment of the present invention.
FIG. 13 is a diagram illustrating an electrical state of a measuring process of detecting a light emitting module having a light emitting device that does not reach a product standard by a solar cell module in a second embodiment of the present invention.
14 is a plan view illustrating a light emitting module measuring apparatus according to a third exemplary embodiment of the present invention.
FIG. 15 is a diagram illustrating an electrical state of a measuring process of detecting a light emitting module of good quality by a solar cell module in a third embodiment of the present invention.
FIG. 16 is a view illustrating an electrical state of a measuring process of detecting a light emitting module having a light emitting device that does not reach a product standard by a solar cell module in a third embodiment of the present invention.

DETAILED DESCRIPTION The technical details, features and effects of the present invention will become apparent from the detailed description of the preferred embodiments in conjunction with the accompanying drawings. For convenience of description, a plurality of light emitting devices of the following light emitting modules are disposed along the length direction, and a stand circuit necessarily provided in the base of the measuring device is omitted in order not to confuse the drawings.

3 is a block diagram of a first embodiment of the present invention. As shown in FIG. 3, the structure of the measuring device includes a base 30 used for energy transfer and loading during measurement, a moving device 32 for sequentially importing and exporting the measured object, and at least one solar cell 331. It includes a solar cell module 33, a processing device 35 for receiving a measurement signal received through the solar cell module 33, further processing, analysis.

The actual structure of the first embodiment of the present invention is as shown in Figs. The light emitting element 70 to be measured is, for example, a light emitting diode chip, and the light emitting element 70 is disposed on the base 30 by being divided and separated from the wafer. In this example, the moving device 32 includes a base ( It is a two-dimensional moving stack for moving 30) and can move thousands to tens of thousands of light emitting elements 70 cut from a wafer in a batch.

 The solar cell module 33 of this example has been described taking the solar cell 331 of a single cell as an example, and is shown inverted 180 degrees. The working surface 622 of the solar cell 331 faces the light emitting element 70 to be measured, and the color filter group, for example, a single color filter 624, on the side of the working surface 622 facing the light emitting element 70. ) Is further placed. The transmission function of the color filter group selected here is multiplied by the wavelength response function of the solar cell 331, and then corresponds to the standard luminous efficiency function to thereby obtain the light emission luminance corresponding to the visual effect and to reduce the measurement error. 331 approaches the light emitting element 70 to be measured so that the light emission amount of the light emitting element 70 is mainly irradiated to the working surface 622 of the solar cell 331 and is much larger than the light emission amount scattered out of the solar cell 331. To do that.

6 and 7, the light emitting module measuring apparatus 3 ′ according to the second embodiment of the present invention measures the light emitting state of a light emitting module having a plurality of light emitting elements 70, and also emits light. And a sensing device and a moving device 32 'capable of sensing a plurality of light emitting elements 70 at the same time.

As described above, the solar cell module 33 ′ is used as a sensing device, and the light bar having a plurality of light emitting diodes is a light emitting module having a plurality of light emitting elements 70. When the measurement device 3 'starts to proceed with the measurement, the light emitting module 7 to be measured is first placed on the moving device 32', and the light emitting surface of the light emitting module 7 to be measured is faced upward, and the solar cell module The light emitting module 7 is positioned at a preliminary position 0 far from the sensing range of 33 ', and then the light emitting module 7 is operated through the base 30' to emit a plurality of light emitting devices 70.

It should be emphasized in this section that if a light bar has 60 LED chips and is divided into six sets of spaced apart and intersected with each other, operating multiple light emitting elements to emit light must cause all LED chips to simultaneously Instead of being limited to emitting light, for example, ten crystal grains can be selected and operated simultaneously in one pair, and the remaining five pairs may be measured in chronological order without being turned on for a while.

For convenience of description, in defining the next step, a direction in which the mobile device 32 'drives and moves the light emitting module 7 as shown in FIG. 8 is referred to as a predetermined movement direction, and the predetermined movement direction is Inevitably coinciding with the longitudinal direction of the light emitting module 7, the first light emitting device 70 that is brightly lit in the light emitting module 7 to be measured senses the solar cell module 33 ′ at the preliminary position. Enter the range. The brightly lit light emitting device 70 also enters the sensing range in order, for example at a certain speed. As shown in FIG. 9, when all the light emitting devices 70 under measurement enter the sensing range of the solar cell module 33 ′, the position is referred to as a complete sensing position 81. If the luminance of all the light emitting devices under test is all normal and the difference in the luminance of light from the difference is very small, the luminance obtained by the measurement is not shown at all in the preliminary position 0, as shown in FIG. It gradually increases to the maximum value corresponding to the sensing position 81.

As a person skilled in the art can easily understand, a method of gradually decreasing the amount of light emitted as opposed to a method of gradually increasing the amount of light emitted may be used. For convenience of explanation, the point of time when the first of each of the brightly lit light emitting devices shown in FIG. 10 will soon leave the detection range of the solar cell module 33 ′ is called a preliminary departure position 82; In addition, as shown in FIG. 11, the light emitting device 70 under measurement is gradually measured until it reaches the measurement completion position E which has completely missed the detection range of the solar cell module 33 ′, thereby being shown in the second half of FIG. 12. You get the value as shown. The measured luminance gradually decreases from the maximum value corresponding to the preliminary departure position 82 to the first reference luminance corresponding to the measurement completion position E. FIG.

As shown in FIG. 11, one of the two surveying sensing processes (or both processes) is subsequently selected and processed by the processing device 35 'based on the sensing signals and the time sequence corresponding to each other. The sensing signal detects whether the light emitting module is in good condition by estimating the change in the electrical state that the solar cell module 33 'responds to the light emitting state of the object to be measured. Once either light emitting device 70 does not reach a predetermined standard, as shown in FIG. 13, the first gradually increasing upward trend (or gradually decreasing downward curve) causes non-ideal bending. That is, it is possible to calculate where the position of the light emitting device that does not reach the quality standard according to the time order (t).

For example, since the length of the light bar tends to increase day by day, as shown in Fig. 14 of the third embodiment of the present invention, the measuring device 3 "is limited in space to the solar cell module 33". Even when the detection range cannot cover all the light emitting devices in the light emitting module 7 "at the same time, the detection result is as shown in Fig. 15 or 16. That is, all of the light emitting devices that are brightly lit at the preliminary position (0). By the state where the last one has reached the measurement completion position E from the complete sensing position or the preliminary departure position entering the sensing position, the position of the failing light emitting device can still be clearly analyzed.

In particular, since the mechanical movement speed is much slower than the switching speed of the electrical signal, as shown in FIG. 14, the left and right light emitting devices each belong to different light emitting groups, or for example, two (even more) lights. Even when the bars are arranged side by side as shown in FIG. 14, the sensing efficiency may be further improved by lighting the LED chips in the left and right rows alternately or by lighting the two (or more) light bars alternately. As can be seen from the above, in the light emitting module measurement of all forms, the present invention can quickly measure the light emitting state of a light emitting element that does not conform to the standard according to the light emitting state reacted according to the order of the elements. It maintains the accuracy of verification results and can immediately identify defective devices without the need for excessive payment.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Belongs to the scope of.

11: integrating sphere
13: shading plate
20: light receiving device
28: opening
3, 3 ', 33'': measuring device
30, 30 ': base
32, 32 ': moving device
33, 33 ', 33'': solar module
331: solar cell
35, 35 ': processing unit
622: working surface
624: color filter
70: light emitting element
7 ', 7'': light emitting module
0: reserved position
E: Measurement completed position
81: complete detection position
82: preliminary release position

Claims (10)

A base accommodating a light emitting module having a plurality of light emitting elements under test, and for operating the light emitting elements to emit light, wherein the light emitting elements are arranged along one arrangement direction;
A mobile device which sequentially imports and unloads a plurality of light emitting devices under measurement to the base in a direction coinciding with the arrangement direction; And
Solar cell module comprising at least one solar cell
/ RTI >
The at least one solar cell has a working surface, and the working surface of the at least one solar cell has a sensing range covering a plurality of light emitting elements of the light emitting module under measurement, and the solar cell module has the sensing order in order. It is used to detect the light emission of the light emitting module under test that enters and / or leaves the range, and also converts and outputs the detection signal.
Light emitting device measuring apparatus, characterized in that. The method of claim 1,
The at least one solar cell has a wavelength response function, the solar cell module is installed on the working surface side of the at least one solar cell, multiplied by the wavelength response function and having a transmission function corresponding to a standard viewing efficiency function Light emitting device measuring apparatus further comprises a color filter group. 3. The method according to claim 1 or 2,
The light emitting device measuring apparatus further comprises a processing device for receiving a detection signal of the solar cell module. 3. The method according to claim 1 or 2,
The at least one solar cell has a working surface, the working surface of the at least one solar cell faces the base, and is used to convert light energy irradiated to the at least one solar cell into electrical energy, the at least one The distance between the solar cell and the base is a light emitting device measurement, characterized in that the light energy irradiated to the at least one solar cell is much larger than the light energy irradiated out of the working surface of the solar cell when the device under measurement emits light Device. The light emitting elements in the light emitting module are arranged along the longitudinal direction, and measure the light emitting state of the light emitting elements in the light emitting module by a measuring device, the measuring device comprising: a base; A solar cell module installed at the base and having a detection range capable of covering a plurality of light emitting devices, and detecting the light emission of the light emitting devices and converting the light into a detection signal and outputting the detected signal; And a moving device for moving the light emitting module relative to the solar cell module in a predetermined movement direction, the method of measuring a light emitting module having a plurality of light emitting devices.
a) arranging the light emitting module in a manner in which a longitudinal direction coincides with the predetermined moving direction, and operating the light emitting device of the light emitting module under measurement with the base to emit light;
b) moving the light emitting module with respect to the solar cell module according to the predetermined movement direction by the mobile device, so that the light emitting elements of the light emitting module under test enter and / or leave the detection range of the solar cell module sequentially; To cause;
c) detecting, by the solar cell module, a state in which the light emitting device enters and / or exits a detection range, and outputting a detection signal in which the amount of light emitted changes according to the state and time of the light emitting device within the detection range ; And
d) after step c), a processing step of calculating, by the processing apparatus, a light emitting state of the light emitting element according to a time change state of a detection signal;
Lt; / RTI >
The measuring device further includes a processing device for receiving a detection signal of the solar cell module.
Method for measuring the light emitting module, characterized in that. 6. The method of claim 5,
And in step b), instructing the mobile device to move at a predetermined speed through the processing device. The method according to claim 5 or 6,
The light emitting device is a light emitting diode chip, and the light emitting module is a light bar having a plurality of light emitting diode chips installed thereon. In step b), the light bar under measurement corresponds to the longitudinal direction of the light bar under measurement through a moving device. By moving according to a predetermined movement direction, so that the last one arranged in the longitudinal direction of the light emitting diode chip enters the detection range from the preliminary position where the light emitting diode chips do not all enter the solar cell all detection range. Method of measuring the light emitting module, characterized in that for moving to the complete detection position. The method according to claim 5 or 6,
The light emitting device is a light emitting diode chip, and the light emitting module is a light bar having a plurality of light emitting diode chips installed thereon, and the step b) corresponds to a longitudinal direction of the light bar under measurement through a mobile device. A measurement in which all the LED chips leave the detection range at a preliminary position where the first one arranged along the longitudinal direction of the LED chips soon leaves the detection range of the solar cell module by moving along a predetermined movement direction. Method of measuring the light emitting module, characterized in that to move to the complete position. delete delete

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