KR100721149B1 - Apparatus for measuring light intensity of light emitting device - Google Patents

Abstract

The present invention relates to a light quantity measuring device for measuring the amount of light emitted from a light emitting device, in particular, a side light emitting diode, and not only enables accurate and easy light quantity measuring method of the side light emitting diode, but also to various light emitting devices regardless of a specific shape. There is an advantage to implement a system that can measure the amount of light continuously and rapidly.

To this end, the present invention, the integrating sphere for measuring light for measuring the amount of light emitted from the light emitting element; The optical measuring unit is coupled to the optical measuring integrating sphere, the seating portion on which the light emitting element is mounted, and the light emitted from the light emitting element mounted on the mounting portion and integrally formed with the coupling portion and the seating portion. An optical measuring jig having a side portion formed of an inclined reflective surface for reflecting into the integrating sphere; And a control unit coupled to the optical measuring jig and supplying power to a light emitting device mounted on a seating part of the optical measuring jig.

Light emitting element, diode, LED, side light emission, jig, slope

Description

Light quantity measuring device of light emitting device {APPARATUS FOR MEASURING LIGHT INTENSITY OF LIGHT EMITTING DEVICE}

1 is a schematic diagram showing a light quantity measuring method of a top-emitting LED according to the prior art,

2 is a view showing a light quantity measuring device according to the prior art,

3 is a characteristic graph showing the relationship between the amount of light and angular displacement of the LED to the top light emitting;

4 is a characteristic graph showing the relationship between the amount of light and the angular displacement of a light emitting diode having side light emission;

5 is a view showing a light quantity measuring device of a light emitting device according to an embodiment of the present invention;

FIG. 6 is a view illustrating a photo measuring jig used in the light quantity measuring device shown in FIG. 5; FIG.

7 is a view showing a jig for measuring light used in the light amount measuring device of the light emitting device according to another embodiment of the present invention,

8 is a view showing a light emitting device module applied to another embodiment of the present invention.

<Description of Main Sign of the Present Invention>

10 light emitting device 20 integrating sphere

30: Jig for Luminescence Measurement

40, 50: control unit 60: light emitting device module

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light quantity measuring apparatus of a light emitting device, and more particularly, to a light quantity measuring apparatus for measuring the amount of light emitted from a side light emitting diode.

Light Emitting Diodes (hereinafter, referred to as LEDs) are semiconductor devices capable of realizing various colors of light by forming light emitting sources by changing compound semiconductor materials such as GaAs, AlGaAs, GaN, and InGaInP. Say.

In recent years, LED devices have been driven by the rapid development of semiconductor technology, so that they can escape from low-intensity general-purpose products and produce high-brightness and high-quality products. In addition, as the implementation of high-performance blue and white diodes becomes a reality, the application value of LEDs is being extended to displays, next-generation lighting sources, and the like. As an example, not only LED devices having a surface mounting device but also power LED devices having a large lens are commercialized.

Modules in which the LED element and the lens are combined may be divided into LEDs having a top emission type and LEDs having a side emission type according to differences in emission directivity angles.

1 is a schematic diagram showing a light amount measuring method of a conventional LED of the conventional top emission method. LED measurement using this method is mainly measured in units of candela [Cd], and the method as shown in FIG. 2 is used as an integrating sphere to measure the total amount of light.

When measuring the light quantity of the LED 10 using the conventional light quantity measuring apparatus as shown in Figure 2, the direction angle (θ) of the LED to be measured must be defined inside the inlet of the integrating sphere 20 Correct measurement is possible in a detector (DETECTOR) 70, and this direction angle [theta] is in a region of ± 70 ° as shown in FIG. 3 since 50% or more of the amount of light of the LED 10 that emits light is shown. There was no difficulty in the measurement. 3 is a characteristic graph illustrating a relationship between relative intensity and angular displacement of an LED emitting top emission.

However, in the side-emitting LED, as shown in Fig. 4, since 50% or more of the amount of light exists in a narrow region of 60 ° to 120 ° and -120 ° to -60 °, When using the illustrated light quantity measuring device there is a problem that the correct light quantity value is not detected. 4 is a characteristic graph showing the relationship between the relative light quantity and the angular displacement of the LED emitting side light.

On the other hand, in the LED emitting side light, as described above, more than 50% of the amount of light exists in a narrow region of 60 ° to 120 ° and -120 ° to -60 °, and thus, as in the conventional top emitting LED, It is difficult to apply the method to measure the position of LED at the top of the LED. To solve this problem, the photodetector is arranged in an array type around the LED and the photodetector is moved around the fixed LED. The method is used. However, the array arrangement method of the photodetector causes a rise in price of the measuring instrument, and the measuring method of moving the photodetector around the LED has a problem in that the measurement time is long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is not only to enable an accurate and easy light measurement method of LEDs, particularly side emitting LEDs, but also to continuously control the amount of light for various LEDs regardless of the shape of the LEDs. The present invention provides a light emitting device light quantity measuring method suitable for mass production of LED and LED BLU (Back Light Uint) by implementing a system capable of measuring to enable rapid measurement without error of light quantity.

The light quantity measuring device of a light emitting device according to an embodiment of the present invention for achieving the above object is an integrating sphere for measuring the light emission from the light emitting device; Coupling portion for coupling with the optical measuring integrating sphere, the seating portion on which the light emitting element is mounted, the light is formed from the light emitting element mounted integrally with the coupling portion and the seating portion mounted on the seating portion of the lower plate An optical measuring jig having a side portion formed of an inclined reflective surface to reflect the light into the optical measuring integrating sphere; And a control unit coupled to the optical measuring jig and supplying power to a light emitting device mounted on a seating part of the optical measuring jig.

In addition, the light quantity measuring device of the light emitting device according to another embodiment of the present invention for achieving the above object is an optical measuring integrating sphere for measuring the amount of light emitted from the light emitting device; Coupling portion for coupling with the optical measuring integrating sphere, the seating portion on which the light emitting element is mounted, and the light emitted from the light emitting element is formed integrally with the coupling portion and the seating portion mounted on the seating portion of the lower plate An optical measuring jig having a side portion formed of an inclined reflective surface to reflect into the optical measuring integrating sphere; And a device transfer part coupled to the optical measuring jig and supplying and mounting a light emitting device to the seating part of the optical measuring jig, and supplying power to the light emitting device mounted on the mounting part of the optical measuring jig by the device transferring part. It includes a control unit consisting of a power supply for supplying.

Here, the light emitting device is preferably a side light emitting diode.

In addition, the inclined reflective surface of the jig for optical measurement is preferably formed of the same material as the internal reflective material of the integrating sphere for the optical measurement.

The optical jig is made of a metal material of iron or aluminum, and the inclined reflective surface of the optical jig is coated with BaSO ₄ material.

In addition, it is preferable that the coupling portion of the optical measuring jig and the optical measuring integrating sphere are detachable.

In addition, the device transfer unit for supplying and mounting the light emitting element to the seating portion of the optical measuring jig, a plurality of light emitting elements are mounted in an array type to enable the supply of a continuous light emitting element to transfer the light emitting element module having a common terminal It is characterized by.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example  One

5 shows an apparatus for measuring light quantity of a light emitting device according to an embodiment of the present invention, and FIG. 6 shows an optical measuring jig used in the apparatus.

As shown in FIG. 5, an apparatus for measuring light quantity of a light emitting device according to an embodiment of the present invention includes an optical measuring integrating sphere 20 for measuring the amount of light emitted from the light emitting device 10 and a light emitting device ( 10 is combined with the optical measuring jig 30, and the optical measuring jig 30, and the seating portion 32 of the optical measuring jig 30 to focus the light emitted from 10) into the integrating sphere It includes a control unit 40 for supplying power to the light emitting device (10) mounted on the.

As the light emitting device 10 used in the present embodiment, it can be applied variously from a SMD type LED to a power LED having a large lens, but more than 50% of the light amount is 60 ° to 120 ° and -120 ° to -60 °. It is more preferable when applied to the side-emitting LED present in a narrow area of. In addition, it is obvious that the light emitting device to be applied to the present embodiment is not necessarily limited to the LED, but can be applied to various light emitting devices emitting side surfaces.

The integrated sphere 20 is a spherical body coated with a material having a high reflectance on the inner surface, and the photodetector 70 for measuring the total emission amount from the light emitted from the light emitting element reflected on the inner surface on the spherical body is provided. Attached. In addition, the integrating sphere 20 is provided with a hole for receiving the light emitted from the light emitting element, and a protrusion for coupling with a photo measuring jig, which will be described later, around the hole. The integrating sphere serves to focus and send light to the spectrometer to measure peak wavelength, dominant wavelength, CIE color coordinates, and total light quantity among optical characteristics of light emitted from the light emitting device.

As shown in FIG. 6, the optical measuring jig 30 includes a coupling part 31 for coupling with the optical measuring integrating sphere 20, and a mounting part 32 on which the light emitting device 10 is mounted. And an inclined reflecting surface which is formed integrally with the coupling part 31 and reflects the light emitted from the light emitting element 10 mounted on the seating part 32 into the integrating sphere 20 for measuring light. It is formed of a side portion 33. The optical measuring jig 30 serves to focus and reflect the light emitted from the light emitting device 10, in particular, the side light emitting device, into the integrating sphere 20. This role is possible because the side portion 33 of the optical measuring jig is formed as an inclined surface, and the inclined surface is formed in a cylindrical shape and its side is inclined at a predetermined angle. The inclined surface of the side portion 33 may be installed in a variable manner according to the type of light emitting device to be measured, and the reflected light is focused into the integrating sphere for measuring light according to the inclination angle to emit light to the side like a side light emitting LED. Accurate light quantity measurement is also possible for the device.

In addition, the side portion 33 formed of the inclined surface of the cylindrical shape is formed of the same material as the internal reflection material of the integrating sphere for the optical measurement, or a material capable of reflecting light into the integrating sphere for the optical measurement It is preferable that it consists of metals, such as iron or aluminum. In addition, it may be internally coated with at least one of the group consisting of aluminum, rhodium, silver and BaSO ₄ or a compound thereof to increase the reflection efficiency.

On the other hand, a terminal for supplying power to the light emitting device mounted on the seating portion 32 is exposed to the outside of the jig 30, the power supply of the control unit 40 described later in this terminal portion is electrically connected Thus, a predetermined current is applied to the light emitting device under test.

In addition, the coupling portion 31 and the optical measuring integrating sphere 20 of the optical measuring jig 30 is detachable so that the optical measuring jig 30 can be used in parallel with other general measuring instruments. It is desirable to combine in the possible way.

The control unit 40 is formed in a holder shape that is coupled to the optical measuring jig 30, the light emitting element 10 mounted to the seating portion 32 of the optical measuring jig 30 in the frame of the holder. The power supply unit for supplying power to the terminal portion of the) is formed.

Example  2

Hereinafter, an apparatus for measuring light quantity of a light emitting device according to another embodiment of the present invention will be described. In the above-described embodiment, the light quantity measuring method for the element such as side light emission was described by separately supplying the unit elements to the seating portion 32 of the jig 30 for optical measurement. On the contrary, the present embodiment is configured to increase the productivity by shortening the test time for the device under test by automatically supplying the light emitting device to the seating portion 32 of the jig 30 for optical measurement. It is included.

The light quantity measuring device of the light emitting device according to the present embodiment includes an optical measuring integrating sphere 20 for measuring the amount of light emitted from the light emitting element, and a coupling part 31 for coupling with the optical measuring integrating sphere 20. And, the light emitting element is mounted to the mounting portion 32, and the coupling portion 31 is formed integrally with the light emitted from the light emitting element mounted on the seating portion 32 the integrating sphere for the optical measurement (20) The optical measuring jig 30 made up of a side portion 33 formed as an inclined reflecting surface to be reflected inside, coupled with the optical measuring jig 30, and a seating part of the optical measuring jig 30. An element transfer unit 51 for continuously supplying and mounting a light emitting element to the light emitting unit 32; and a power supply unit for supplying power to the light emitting element mounted on the seating unit 32 of the photo-measuring jig 30 by the element transfer unit. And a control unit 50 consisting of 52.

Here, since the configuration of the light emitting device 10 and the light measuring integrating sphere 20 for measuring the amount of light emitted from the light emitting device is the same as in the first embodiment described above, a detailed description thereof will be omitted.

As shown in FIG. 7, the optical measuring jig 30 according to the present exemplary embodiment includes a coupling part 31 for coupling with the optical measuring integrating sphere 20 and the light emitting element 10 to be coupled to each other. It is formed integrally with the mounting portion 32, the coupling portion 31 and the light emitted from the light emitting element 10 mounted on the mounting portion 32 into the optical measuring integrating sphere 20 It is made of a side portion 33 formed of an inclined reflective surface to reflect. As described above, the optical measuring jig 30 serves to focus the light emitted from the light emitting device 10, particularly the side light emitting device, into the integrating sphere 20. This role is possible because the side surface part 33 of the optical measuring jig is formed as an inclined surface, and the inclined surface is cylindrical and its side is inclined at a predetermined angle. That is, the reflected light is focused into the integrating sphere for measuring light according to the inclination angle, thereby enabling accurate light quantity measurement even for a device emitting sideways such as a side emitting LED. In addition, as described above, the side surface portion 33 formed of the inclined surface of the cylindrical shape is formed of the same material as the internal reflective material of the integrating sphere for the optical measurement, or reflects light into the integrating sphere for the optical measurement It is preferable that it consists of metals, such as iron or aluminum which is a material which can be made. In addition, it may be internally coated with at least one of the group consisting of aluminum, rhodium, silver and BaSO ₄ or a compound thereof to increase the reflection efficiency.

Meanwhile, in the above-described embodiment, the light emitting device 10, which is a unit, is electrically connected to a terminal exposed to the outside of the jig 30 in a state where it is manually mounted on the seating part 32. The control unit 40 has a holder shape that is coupled to the optical measuring jig 30, and the light emitting device 10 mounted to the seating part 32 of the optical measuring jig 30 is mounted on a frame of the holder. It is made of a configuration that a power supply for supplying power to the terminal portion is formed.

On the contrary, in the present embodiment, the light emitting device can be continuously supplied to the seating portion 32 of the jig 30 for optical measurement, thereby shortening the test time for the device under test, thereby increasing productivity. Is done. That is, the seating portion 32 of the jig 30 for measuring light is formed in a hole shape so that the unit LEDs can be combined to be mounted from the downward direction, so that a plurality of array type LEDs are sequentially combined to continuously perform a light quantity measurement test. Is performed.

To this end, the control unit 50 according to the present embodiment is a device transfer unit for sequentially transporting and supplying the light emitting device module 60 formed in an array type to the hole-shaped seating portion 32 of the optical measuring jig 30 ( 51 and a power supply unit 52 for supplying power to the common terminal 63 of the light emitting device module 60 mounted on the seating portion 32 of the optical measuring jig 30 by the element transfer unit 51. ). 8 shows an example of a light emitting device module 60 in which a plurality of light emitting devices 62 and a common terminal 63 are formed on a module frame 61 applied to the present embodiment. By this configuration, it is possible to implement a system that can continuously measure the amount of light for a variety of LED regardless of the shape of the LED to be able to measure quickly without the error of the amount of light is suitable for mass production of LED and LED BLU.

The present invention is not limited to the above-described embodiments, but can be variously modified and changed by those skilled in the art, which should be regarded as included in the spirit and scope of the present invention as defined in the appended claims. something to do.

As described above, according to the configuration of the present invention, not only an accurate and easy light measurement method for LEDs, particularly side emitting LEDs, is possible, but also a system capable of continuously measuring a light amount for various LEDs regardless of the shape of the LED is realized. Therefore, it is possible to measure quickly without any error of light quantity, thus creating the effect of mass production of LED and LED BLU.

In addition, it is possible to secure the basic data of the material characteristics according to the reflectance by the inclined side portion of the present invention and to secure the basic data of the reflectance characteristic according to the change in the slope of the inclined side portion.

Claims (7)

An integrating sphere for measuring light for measuring the amount of light emitted from the light emitting element; Integrating sphere for coupling with the optical measuring integrating sphere, the mounting portion for mounting the light emitting element, and the light emitted from the light emitting element mounted integrally with the coupling portion and mounted on the seating integrating sphere An optical measuring jig having a side portion formed of an inclined reflective surface to reflect therein; And A control unit coupled to the optical measuring jig and supplying power to a light emitting device mounted on a seating part of the optical measuring jig; Light quantity measuring device of a light emitting device comprising a. An integrating sphere for measuring light for measuring the amount of light emitted from the light emitting element; Integrating sphere for coupling with the optical measuring integrating sphere, the mounting portion for mounting the light emitting element, and the light emitted from the light emitting element mounted integrally with the coupling portion and mounted on the seating integrating sphere An optical measuring jig having a side portion formed of an inclined reflective surface to reflect therein; And A device transfer part which is sequentially connected to the optical measuring jig and supplies and mounts a light emitting device to a seating part of the optical measuring jig, and a power supply to the light emitting device mounted to the mounting part of the optical measuring jig by the element transferring part. Control unit consisting of a power supply for supplying a; Light quantity measuring device of a light emitting device comprising a. The method according to claim 1 or 2, The light emitting device is a light emitting device measuring the amount of light, characterized in that the side light emitting diode. The method according to claim 1 or 2, The inclined reflecting surface of the jig for measuring light is formed of the same material as the internal reflecting material of the integrating sphere for measuring light. The method of claim 4, wherein The light measuring jig is made of a metal material of iron or aluminum, the inclined reflecting surface of the light measuring jig is coated with BaSO ₄ material, characterized in that the light amount of the light emitting device. The method according to claim 1 or 2, The light quantity measuring device of the light-emitting device, characterized in that the coupling portion of the optical measuring jig and the optical measuring integrating sphere is detachable. The method of claim 2, The device transfer unit for supplying and mounting the light emitting device to the seating portion of the photo-measuring jig, characterized in that for transporting the light emitting device to a plurality of light emitting devices are mounted in an array type and transfer the light emitting device module having a common terminal Light quantity measuring apparatus of the light emitting element made into.

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