KR100979672B1 - Apparatus of phosphor liquid analysis and method of analysing phosphor liquid for manufacturing led - Google Patents

Abstract

PURPOSE: An apparatus of phosphor liquid analysis and a method of analyzing phosphor liquid for manufacturing LED are provided to analyze the photonic of the mixed solution. CONSTITUTION: An apparatus of phosphor liquid analysis comprises: a step of Supplies the silicon to the mixing vessel; a step of supplying the fluorescent material to the mixing vessel(S100); a step of mixing the silicon and the fluorescent material crowding with the mixing vessel(S300); a step of spreading the mixed solution of the fluorescent material and the silicon passing the mixing step is spread in the transparency holder(S500); and a step of measuring the wavelength of the light in which the light is examined in the transparency holder and transmitting the mixed solution(S600).

Description

Fluorescent liquid analysis apparatus and method for manufacturing light emitting diodes {APPARATUS OF PHOSPHOR LIQUID ANALYSIS AND METHOD OF ANALYSING PHOSPHOR LIQUID FOR MANUFACTURING LED}

The present invention relates to a fluorescent liquid analysis device and analysis method for manufacturing a light emitting diode, and more particularly, to an apparatus and method for analyzing and evaluating optical characteristics of a fluorescent liquid produced by mixing a fluorescent material with silicon.

In general, LED chips usually emit blue or red light. When the fluorescent solution mixed with silicon and fluorescent material is applied to the LED chip, the color of light generated from the LED device is changed according to the amount of fluorescent material.

For example, the light emitted from the LED chip emitting blue light does not collide with the fluorescent material in the process of transmitting the fluorescent liquid is kept blue. Light collided with the fluorescent material particles contained in the fluorescent solution emits yellow light having a shorter wavelength as secondary light. As such, blue light, which maintains the primary color, and yellow light having a shorter wavelength are mixed to emit light having a white hue. The color characteristics of the light emitted from the LED device vary according to the composition and characteristics of the fluorescence.

That is, by dispensing an appropriate amount of silicon containing fluorescent material in a package in which the LED chip is mounted, it is possible to manufacture LED devices of white light or various other colors.

In general, the optical characteristics of the LED device is expressed as a value on the color coordinate of the 1931 International Commission on Illumination (CIE). The color coordinate value of the light generated from the LED chip changes depending on the amount of fluorescent material applied. The color coordinate value of the LED element is one of the important specifications of the LED element and becomes defective if the color coordinate value of the LED element is out of the specified range.

In addition to applying the correct amount of silicon to such an LED chip, it is also very important to mix and apply the fluorescent material and silicon in the correct ratio and to analyze and evaluate the optical properties of the fluorescent solution. In particular, because the characteristics of the LED chip is different for each wafer or wafer lot on which the LED chip is formed due to the nature of the LED chip manufacturing process, the fluorescent material and silicon must be mixed and applied to the LED chip each time in a suitable mixing ratio.

Therefore, there is a need for an apparatus and method for effectively analyzing and evaluating optical characteristics of a fluorescent solution mixed with silicon and a fluorescent material.

The present invention has been made to meet the needs as described above, a light emitting diode that accurately improves the fluorescent material to be mixed with silicon at a predetermined mixing ratio, and to automatically perform the process of analyzing and evaluating the optical properties of the mixture liquid An object of the present invention is to provide a method for analyzing a fluorescent solution for production and an apparatus for performing the method.

In order to achieve the above object, the present invention, in the fluorescent liquid analysis method for manufacturing a light emitting diode for analyzing the optical characteristics of the mixed solution in which the fluorescent material is mixed with silicon in order to manufacture the LED, silicon supply for supplying silicon to the mixing vessel step; Supplying a fluorescent material to the mixing vessel; Mixing the silicon and the fluorescent material filled in the mixing vessel; An application step of applying the mixed solution of the silicon and the fluorescent material passed through the mixing step to a transparent holder; And an optical analysis step of measuring the wavelength of the light transmitted through the mixed solution by irradiating light to the transparent holder.

In addition, the present invention, a fluorescent liquid analyzer for manufacturing a light emitting diode for analyzing the optical characteristics of the mixed solution in which the fluorescent material is mixed with silicon in order to manufacture an LED, the apparatus comprising: a silicon supply unit for supplying silicon to the mixing vessel; A fluorescent material supply unit supplying a fluorescent material in powder form to the mixing container; A scale for measuring the weight of the mixing vessel; A control unit which receives the measured value of the scale and controls the silicon supply unit and the fluorescent substance supply unit; Mixing unit for mixing the silicon and the fluorescent material filled in the mixing vessel; An application unit for applying a mixture of silicon and fluorescent material mixed in the mixing unit; A light source for irradiating light to the mixed solution applied by the applicator; And a light sensing unit measuring a wavelength of light transmitted through the mixed solution.

According to the present invention, a fluorescent solution analyzing method for manufacturing a light emitting diode and a fluorescent liquid analyzing device for manufacturing a light emitting diode include accurately improving a fluorescent substance in a powder form and silicon in a liquid state, mixing the mixture at a ratio desired by the user, and evaluating and analyzing the optical properties of the mixed solution. There is an effect to provide a method and apparatus that can be.

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

1 is a schematic diagram of a fluorescent liquid analyzer for manufacturing a light emitting diode according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for analyzing a fluorescence liquid according to the present embodiment includes a silicon supply unit 10, a fluorescent substance supply unit 20, a mixing unit 50, a vacuum unit 60, and a control unit 40. .

The silicon supply unit 10 and the fluorescent substance supply unit 20 supply silicon and the fluorescent substance to the mixing vessel 1, respectively. Silicones mixed with fluorescent materials are generally composed of a main material and a curing agent. When the main material and the curing agent are mixed and heated to an appropriate temperature, the liquid silicone hardens. The silicon supply section 10 includes a main supply section 11 and a curing agent supply section 12. As the main feed portion 11 and the hardener feed portion 12, a linear pump for dispensing liquid resin is generally used. The control unit 40 controls the operation of the main supply unit 11 and the curing agent supply unit 12 to adjust the supply of silicon.

The scale 30 is disposed below the silicon supply unit 10. A mixing vessel 1 is placed on top of the scale 30, and a silicone main body and a curing agent are dispensed into the mixing vessel 1. The weight of the silicone main material and the hardener measured by the balance 30 is transmitted to the control unit 40, and the control unit 40 receives the weight of the silicon filled in the mixing container 1 and feeds the silicon in the ratio and amount set by the user. The main feeder 11 and the hardener feeder 12 are controlled to fill the mixing vessel 1.

The fluorescent substance supply unit 20 supplies the fluorescent substance in powder form to the mixing vessel (1). The balance 30 measures the weight of the fluorescent substance filled in the mixing vessel 1 and feeds the value back to the controller 40. The controller 40 receives the weight measured by the scale 30 and controls the fluorescent substance supply unit 20 to supply the amount of fluorescent substance set by the user to the mixing container 1.

The mixing vessel 1 filled with the silicon and the fluorescent substance at a predetermined ratio and amount by the control unit 40, the silicon supply unit 10, the fluorescent substance supply unit 20, and the scale 30 is transferred to the mixing unit 50. . The mixing vessel 1 may be delivered by a conveyor belt, or may be clamped by a separate transfer robot and transferred to the mixing unit 50. The mixing unit 50 mixes the silicon and the fluorescent material filled in the mixing vessel 1 to mix well with each other. The mixing unit 50 may be configured to mix the silicon and the fluorescent material by rotating at a high speed in the clamping state of the mixing container 1, and may be installed by rotating the rotor blades so as to rotate the rotary vanes. Silicon and fluorescent materials can also be mixed.

The mixing vessel 1 in which silicon and the fluorescent material are mixed is transferred to the vacuum unit 60. The vacuum unit 60 has a vacuum chamber. The vacuum unit 60 contains bubbles 3 contained in the fluorescent liquid 2 (mixture 2 of silicon and the fluorescent substance 2) by lowering the pressure inside the chamber while the mixing container 1 is accommodated inside the vacuum chamber. ). In the process of mixing the silicon and the fluorescent material in the mixing unit 50, a large number of bubbles (3) can be generated in the fluorescent liquid (2), the quality of the LED device manufacturing by removing the bubbles (3) in the vacuum unit 60 Can improve.

The mixing vessel 1 passed through the vacuum unit 60 is transferred to the application unit 70. The applicator 70 generally uses a linear pump used to dispense resin. The coating unit 70 applies the fluorescent liquid 2 to the transparent holder 83. The transparent holder 83 may be formed in the form of a glass tube, or may be formed in the form of a glass plate. When the transparent holder 83 is formed in the form of a glass tube, the fluorescent liquid 2 is applied and cured inside the glass tube. In the case where the transparent holder 83 is formed in the form of a glass plate, two glass plates are provided in one set to apply the fluorescent liquid 2 to one of the glass plates and cover the other glass plate thereon so that the fluorescent liquid 2 is formed. Allow to cure.

Light is emitted from the light source 81 to the transparent holder 83 as described above. The light source 81 may irradiate laser light of a single wavelength or a relatively narrow wavelength band, or may emit light emitted from an LED chip in a state where the fluorescent liquid 2 is not applied. The light irradiated from the light source 81 passes through the fluorescent solution 2 inside the transparent holder 83, thereby changing optical characteristics. The light passing through the silicon without passing through the fluorescent material and not colliding with the fluorescent material has almost no change in wavelength, and the light collided with the fluorescent material emits secondary light whose wavelength is shortened. Depending on the amount of the fluorescent material mixed in the silicon, the optical properties of the light and the wavelength distribution of the light transmitted through the fluorescent solution 2 will vary.

The light detecting unit 82 detects light transmitted through the fluorescent liquid 2 and the mixed liquid and analyzes the optical characteristics thereof. The mixing quality of the mixed solution 2 is judged according to the optical characteristic or color coordinate value analyzed by the light sensing unit 82, and the mixed solution 2 is applied to the LED chip when it is read as normal quality or good quality to manufacture the LED device. Can be. If the optical properties of the mixed liquid 2 are not satisfactory, the mixed ratio is adjusted to produce a new mixed liquid 2 or supplemented with silicon or fluorescent material based on the result of the optical characteristics read by the light sensing unit 82. By changing the optical properties of the mixed liquid 2 can be improved. The light detector 82 may detect light transmitted through the fluorescent solution 2 or may detect light reflected after passing through the fluorescent solution 2.

The silicon supply unit 10, the fluorescent substance supply unit 20, the mixing unit 50, the vacuum unit 60, the coating unit 70, the light source 81, the light sensing unit 82, and the control unit configured as described above 40 is sequentially installed on the base, and the mixing vessel 1 is transferred between each component by a conveyor belt or a transfer robot.

An example of the method for analyzing the fluorescent liquid 2 for manufacturing the light emitting diode for analyzing the optical characteristics of the mixed liquid 2 using the light emitting diode manufacturing apparatus for the light emitting diode manufacturing according to the present embodiment configured as described above will be described below.

2 is a flowchart showing an example of a method for analyzing the fluorescent solution 2 for manufacturing a light emitting diode according to the present invention.

First, the fluorescent material supply step (S100) is performed. In the fluorescent material supply step (S100), the fluorescent substance in powder form is supplied to the mixing container 1. The balance 30 measures the weight of the fluorescent material additionally supplied to the mixing container 1 and transmits the weight to the control unit 40. The control unit 40 controls the operation of the fluorescent material supply unit 20 to control the fluorescent material to be mixed with silicon. Adjust the ratio.

When the fluorescent material supply step (S100) is completed as described above, the silicon supply step (S200) for supplying silicon to the mixing vessel (1) is performed. As described above, the silicon supply step S200 is performed by supplying the silicon main material by the main supply unit 11 (S210) and by supplying the curing agent by the curing agent supply unit 12 (S220). The silicon supply step S200 is performed by measuring the weight of the silicon supplied using the scale 30 and transmitting the value to the controller 40. In this way, the silicon supply step S200 may be performed to feedback-control the silicon supply amount. The amount of the silicone main material is controlled by first feeding the silicone main material to the mixing vessel 1 and measuring its weight, and then the weight of the silicone main material is measured while supplying the silicone curing agent to control the proportion of the silicone curing agent to be mixed with the silicone main material.

Next, the mixing step (S300) of mixing the silicon and the fluorescent material filled in the mixing vessel (1) is performed. Silicon and the fluorescent material are mixed using the mixing unit 50 configured as described above. In the mixed solution 2 in which the silicon and the fluorescent material are mixed, bubbles 3 may be mixed in the production process. Such bubbles 3 may reduce the quality of the LED manufacturing process.

When the mixing step S300 is completed, the vacuum step S400 is performed to remove the bubbles 3 contained in the mixed solution 2. In the vacuum step (S400), by lowering the pressure around the mixed liquid 2 by the same configuration as the vacuum unit 60, the bubble 3 contained in the mixed liquid 2 is discharged to the outside, and the mixed liquid 2 is used. The quality of the LED manufacturing process can be improved.

Next, a coating step (S500) of applying the mixed solution (2) of the silicon and the fluorescent material passed through the mixing step (S300) to the transparent holder 83 is performed. As described above, the transparent holder 83 may be a glass tube, a glass plate, or the like. In the application of the mixed liquid 2, a dispensing pump for applying a liquid synthetic resin is used.

When the coating step (S500) is completed, the optical analysis step (S600) for analyzing the optical characteristics of the mixed solution (2) is performed. In the photoanalysis step S600, the light detector 82 measures the wavelength of the light transmitted through the mixed solution 2 by irradiating light onto the transparent holder 83. The light source 81 of light irradiated in the optical analysis step S600 uses light emitted from a laser or LED device having a single wavelength.

By performing the optical analysis step (S600) in this way, it is possible to grasp the optical characteristics of the fluorescent substance mixture (2). In addition, by performing the optical analysis step (S600), it is possible to predict or adjust the color coordinate value of the light generated from the LED device coated with the mixture (2).

The user may improve the efficiency of the mixed solution production by evaluating the optical characteristics of the fluorescent substance mixture 2 by performing the optical analysis step S600 and plotting a correlation between the value and the color coordinate value of the LED device.

In addition, when the optical characteristics of the mixed solution 2 according to the result of performing the optical analysis step (S600) are not satisfactory, a correction step of supplementing the mixed solution 2 with silicon or fluorescent material to correct the mixed ratio is further performed. The mixing ratio of the liquid mixture 2 can be adjusted.

The present invention has been described above with reference to preferred embodiments, but the scope of the present invention is not limited to the forms described above and illustrated in the drawings.

For example, although the vacuum unit 60 has been described above, the fluorescent liquid analyzer for manufacturing a light emitting diode that does not include the vacuum unit 60 may be configured. If the mixing unit does not generate bubbles in the process of mixing the silicon and the fluorescent material, the vacuum unit becomes unnecessary. Likewise, the vacuum step S400 may be omitted in the method for analyzing a fluorescent solution for manufacturing a light emitting diode.

In addition, while the phosphor supply step (S100) is performed first and the silicon supply step (S200) has been described above, the silicon supply step (S200) may be performed first and the phosphor supply step (S100) may be performed later. have.

In addition, in FIG. 1, the light generated by the light source 81 and transmitted through the mixed liquid 2 inside the transparent holder 83 is transmitted to the light sensing unit 82 and analyzed. The light may be configured to detect and analyze the reflected light after the light passes through the mixed solution. Accordingly, the optical analysis step may be performed by measuring the wavelength of the light reflected after passing through the mixed solution in the light sensing unit.

1 is a schematic diagram of a fluorescent liquid analyzer for manufacturing a light emitting diode according to an embodiment of the present invention.

2 is a flowchart illustrating an example of a method for analyzing a fluorescent solution for manufacturing a light emitting diode according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: mixing vessel 2: mixed liquid

10: silicon supply 11: main supply

12: curing agent supply portion 20: silicon supply portion

40: control unit 50: mixing unit

60: vacuum part 70: coating part

81: light source 82: light detecting unit

S100: phosphor supply step S200: silicon supply step

S210: Subject Feeding Step S220: Curing Agent Feeding Step

S300: Mixing Step S400: Vacuum Step

S500: application step S600: light analysis step

Claims (8)

In the fluorescent solution analysis method for manufacturing a light emitting diode that analyzes the optical characteristics of the mixed solution in which the fluorescent material is mixed with silicon in order to manufacture an LED, A silicon supply step of supplying silicon to the mixing vessel; Supplying a fluorescent material to the mixing vessel; Mixing the silicon and the fluorescent material filled in the mixing vessel; An application step of applying the mixed solution of the silicon and the fluorescent material passed through the mixing step to a transparent holder; And And an optical analysis step of measuring the wavelength of the light transmitted through the mixed liquid by irradiating the transparent holder with light. The silicon supply step, the feedback control of the silicon supply amount by measuring the weight of the silicon supplied using a scale, Wherein the step of supplying the fluorescent material, the fluorescent liquid analysis method for manufacturing a light emitting diode, characterized in that for controlling the feedback of the supply amount of the fluorescent material by measuring the weight of the supplied fluorescent material using a balance. The method of claim 1, The vacuum step of removing the bubbles contained in the mixed solution by applying a vacuum to the mixing vessel after the mixing step; further comprising a fluorescent solution for manufacturing a light emitting diode manufacturing method. The method according to claim 1 or 2, The silicon supplying step includes supplying a silicon main ingredient and supplying a silicone curing agent. delete The method according to claim 1 or 2, The light source of the light irradiated in the optical analysis step is a laser having a single wavelength or fluorescent light analysis method for manufacturing a light emitting diode, characterized in that any one of the light emitted from the LED element. In the fluorescent liquid analysis device for manufacturing a light emitting diode for analyzing the optical characteristics of the mixed solution in which a fluorescent material is mixed with silicon in order to manufacture an LED, A silicon supply for supplying silicon to the mixing vessel; A fluorescent material supply unit supplying a fluorescent material in powder form to the mixing container; A scale for measuring the weight of the mixing vessel; A control unit configured to feedback control the silicon supply unit and the fluorescent substance supply unit by receiving the measured value of the balance; Mixing unit for mixing the silicon and the fluorescent material filled in the mixing vessel; An application unit for applying a mixture of silicon and fluorescent material mixed in the mixing unit; A light source for irradiating light to the mixed solution applied by the applicator; And And a light detector for measuring the wavelength of the light transmitted through the mixed solution. The method of claim 6, And a vacuum unit for removing bubbles contained in the mixed liquid by applying a vacuum to the mixing container. The method of claim 7, wherein The silicon supply unit includes a main body supply unit for supplying a silicon main body and a hardener supply unit for supplying a curing agent.

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