KR101569767B1 - Phosphor material printing apparatus for packaging LED device - Google Patents

Abstract

The present invention relates to a fluorescent material coating device for LED element mounting, which applies a phosphor material to a film to be directly bonded to an LED chip in a uniform and precise thickness so as to form a thin film of a fluorescent material to be attached to the LED chip, .
The present invention relates to a method of manufacturing a fluorescent lamp, comprising: a stage on which a film to be used for a fluorescent liquid is placed;
An elevator installed apart from the upper portion of the stage;
A tilting robot installed to be able to move up and down through the elevator;
A blade coupled to the tilting robot so as to be adjustable in the left and right direction and lowered together with the tilting robot to which a lower force is applied from the elevator so as to apply a fluorescent fluid applied to the film to a predetermined thickness;
An origin sensor disposed on both sides of the stage and measuring the height of both lower ends of the blade;
A control unit for receiving height data of both lower ends of the blade from the origin sensor and controlling the operation of the tilting robot and the elevator in real time while keeping the height of the blade constant; And
And a guide for covering the side of the origin sensor to protect the origin sensor from an external impact.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fluorescent material coating device for packaging LED devices,

The present invention relates to a fluorescent material coating apparatus for LED element mounting, which applies a phosphor material to a film to be directly bonded to an LED chip in a uniform and precise thickness so as to form a fluorescent material thin film attached to the LED chip .

BACKGROUND ART [0002] Light emitting diodes (hereinafter referred to as LEDs) have been widely applied throughout the industry, and in particular, as the demand for white and high-output / high-brightness LED illumination increases, Technology development is progressing actively.

In order to increase the optical performance of the LED, the LED chip having high photoelectric conversion efficiency must be secured at the same time as a packaging technique capable of effectively extracting light.

In particular, white light can be obtained by combining LEDs such as R (red), G (green) and B (blue), combining complementary color LEDs (orange LED + green LED) There are ways to do this. However, these methods have many difficulties in terms of cost, optical characteristics, ease of implementation, and reliability.

In recent years, a method of printing a yellow phosphor on a blue LED has been developed in order to solve the above difficulties. That is, when a blue LED chip is encapsulated with a resin mixed uniformly with a yellow phosphor to encapsulate the blue LED chip, white light is emitted by mixing two wavelengths of complementary color light (emission). This makes it easy and economical to obtain a white LED device.

Such a white LED device can be usefully used as a light source module such as a BLU (Back Light Unit) display. For example, a plurality of white LED devices may be packaged in an array form on a substrate to make a light source module for a BLU of a liquid crystal display (LCD). In addition, BLUs using LEDs can maintain brightness constantly (local dimming) according to a certain set value, and have lower energy consumption than CCFL BLU (Cold Cathode Fluorescent Back Light Unit) ) Is not used and carbon dioxide is not generated.

1, a plurality of LED chips 2 are mounted on a circuit board 1 after preparing a circuit board 1 having wiring on an upper surface thereof, The resin molding part 3 having a convex lens shape (for example, hemispherical shape) is formed by sealing each LED chip 2 and then the resin molding part 3 is formed by a spray coating method through the injection nozzle 4, An LED package manufacturing method for forming a phosphor thin film 6 by applying a coating agent 5 containing a phosphor on its surface is known in Korean Patent Registration No. 10-0755612.

Although the conventional LED package manufacturing method has an advantage that it can implement a COB (chip on board) type LED light source module by directly mounting the LED chip 2 on the circuit board 1 without a separate package body, Since the liquid must be sprayed over a wide range, the amount of the fluorescent liquid consumed is large and the thermal expansion rate is coated with the different materials.

In recent years, in order to solve the above-mentioned problems, a technology for manufacturing an LED package by directly bonding a phosphor thin film obtained by uniformly spraying a fluorescent liquid onto a film on a stage and drying the same, is bonded to an LED chip .

However, the technique of directly bonding the phosphor thin film to the LED chip should be made so that the thickness tolerance of the phosphor thin film is within ± 2.0 μm so as not to affect the scattering of the light. Due to the nature of the spraying method, There is a problem that reliability of the quality of the LED package is deteriorated because it is very difficult to apply.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus for coating an LED element with a uniform and precise thickness.

In order to accomplish the above object, the present invention provides a device for applying a fluorescent material for mounting an LED, comprising: a stage on which a film to be injected with a fluorescent liquid is placed and installed to be reciprocally movable forward and backward; A tilting robot installed to be able to move up and down through an elevator, a tilting robot coupled to the tilting robot so as to adjust posture in the left and right direction, a tilting robot provided with a lifting force from the elevator, A home position sensor disposed at both sides of the stage and measuring the height of both lower ends of the blade, a height sensor for detecting a height of the blade, a control device for controlling the operation of the tilting robot and the elevator in real time, To keep it constant Unit and the home sensor wrapped around the side of the home position sensor characterized by including a guide configured to protect against external impact.

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In addition, a fixed block having guide grooves formed in the left and right direction is fixed to the front of the tilting robot, and the blades may be fastened with bolts while being inserted into the guide grooves of the fixed block.

In this case, an inner edge taper is formed at the lower end of the guide groove, and a support protrusion supported at the inner edge tuck is formed at the upper end of the blade to prevent the blade from being separated after the blade is slid into the guide groove.

In addition, the elevator and the origin sensor are installed on the upper surface of the table, and a slider for moving the stage in the forward and backward directions is installed at the center of the table.

In the present invention constructed as above, since the origin sensor located on both sides of the stage corrects the height of the blade in real time while applying the fluorescent liquid by using the blade instead of the spraying method as the conventional method, the fluorescent liquid is uniformly and precisely There is an effect that can be applied.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating a conventional LED package manufacturing method. FIG.
2 is a perspective view of a device for applying a fluorescent liquid for mounting an LED element according to the present invention.
Figure 3 is a side view of Figure 2;
Fig. 4 is a front view of Fig. 2 showing a state in which the blade is inclined. Fig.
Fig. 5 is a front view of Fig. 2 showing a state in which the height of the inclined blade is corrected. Fig.
Fig. 6 is a side view of Fig. 2 showing a state in which a fluorescent substance is applied by a blade while the stage moves forward; Fig.

The features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It must be interpreted in terms of meaning and concept.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. The same reference numerals are used for the same components, and only the different portions are described for the sake of clarity.

2 to 4, the apparatus for coating a fluorescent substance for mounting an LED device of the present invention comprises a stage 110 on which a film F to be injected with a fluorescent liquid A is placed, A tilting robot 130 installed on the elevator 120, a blade 140 coupled to the tilting robot 130, an origin sensor 150 for measuring the height of the blade 140, .

The stage 110 is a plate-shaped member having a horizontal upper surface, and the fluorescent liquid A is applied to the upper surface through a fluorescent liquid supplying device (not shown) provided in a previous step. In this embodiment, the stage 110 is mounted on the base 160 so as to have a precise horizontal level, for example, and will be described. A slider 161 is installed at the center of the base 160 so that the stage 110 can be moved forward and backward. The stage 110 is coupled to the upper part of the slider 161 and waits in the backward direction. When the fluorescence liquid A is applied to the upper surface of the film F, the stage 110 is moved forward.

An elevator 120 is installed on the base 160. The elevator 120 is installed apart from the upper part of the stage 110. To this end, the base 160 is provided with a horizontal support 170 for supporting the elevator 120 at a predetermined height from the base 160 and the stage 110. A tilting robot 130 is installed in front of the elevator 120. The tilting robot 130 is moved up and down by being given a lift from the elevator 120.

The tilting robot 130 includes a rotating plate 132 coupled to a rotating shaft of a normal / reverse rotation motor 131 and rotated in the left and right direction. The tilting robot 130 is provided with a blade 140. The blade 140 is coupled to the rotary plate 132 so that the posture of the blade 140 is adjusted laterally when the rotary plate 132 rotates.

Accordingly, when the elevator 120 is operated and the tilting robot 130 is moved up and down, the blade 140 moves up and down together with the tilting robot 130. The blade 140 descends toward the stage 110 and moves the fluorescent substance A applied to the film F on the stage 110 passing through the lower portion of the blade 140 to a predetermined thickness tolerance Mu m).

Meanwhile, the rotation plate 132 may be provided with a fixing block 180 for easily detachably fixing the blade 140. A guide groove 181 is formed in the fixed block 180 in the left and right direction and the blade 140 is fastened with bolts in a state of being inserted into the guide groove 181. The blade 140 is inserted into the guide groove 181 and can be fixed at a predetermined position without being moved in forward and backward directions and can be fixed while moving the position along the guide groove 181 in the lateral direction. For this purpose, a bolt hole (not shown) is formed in the blade 140 at regular intervals in the left-right direction.

In this case, an inner edge tang 182 is formed at the lower end of the guide groove 181, and a support protrusion 141 is formed at the upper end of the blade 140 to be supported by the inner edge tang 182, 140 are slid into the guide grooves 181 so that they can be stably supported without falling down.

The blade 140 may be configured such that the front end of the guide groove 181 is easily detached from the fixing block 180 and adhered thereto. With this configuration, the front end of the guide groove 181 can be easily removed from the fixing block 180 without removing the blade 140 from the guide groove 181 in the left-right direction until it completely comes out. The front end of the divided guide groove 181 is separately fixed to the fixed block 180 using bolts. An origin sensor 150 capable of measuring the height of the blade 140 is installed on the base 160. The origin sensors 150 measure the height of the lower ends of the blades 140 disposed on the left and right sides of the stage 110, respectively.

3, when the blade 140 is not horizontal with the proper height, the control unit receives the height data of both lower ends of the blade 140 from the origin sensor 150, The elevator 120 is controlled to maintain the height and the horizontal of the blade 140 constant as shown in FIG. A guide 151 may be further provided on the base 160 to surround the side of the origin sensor 150 so that the origin sensor 150 is protected from an external impact.

The thus constructed fluorescent substance application device for LED element is operated as follows.

First, the proper height of the blade 140 is set through the origin sensor 150. That is, the bottom of the blade 140 recognizes the height of the surface contacting the origin sensor 150 as the origin. When the origin of the origin sensor 150 is set, the elevator 120 raises the blade 140 by a predetermined height to set the position of the blade 140. At this time, the height of the blade 140 considering the thickness of the fluorescent liquid A to be applied to the stage 110 is exactly equal to the height of the upper end of the application surface of the fluorescent liquid A to be applied. 3, if the blade is tilted as shown in FIG. 3, the control unit controls the elevator and the tilting robot to maintain the height and the horizontal state of the blade so as to uniformly apply the predetermined thickness as shown in FIG.

When the position of the blade 140 is set as described above, the stage 110 positioned at the rear moves forward as shown in FIG. At this time, the film (F) on the stage (110) is in a state in which the fluorescent liquid (A) is being supplied from the fluorescent liquid supplying device. 5, when the stage 110 moves forward and passes through the blade 140, the fluorescence liquid A applied to the film F placed on the stage 110 is transferred to the blade 140 To a thickness set naturally.

The origin sensor 150 measures the height of the blade 140 in real time while the blade 140 applies the fluorescent liquid A and the control unit measures the height of the blade 140 received from the origin sensor 150 The height of the blade 140 is corrected in real time by controlling the tilting robot 130 and the elevator 120 based on the origin height measured by the origin sensor 150 at the beginning.

The origin sensor 150 of the present invention is installed on both sides of the blade 140, and can simultaneously detect a height change, a left-right inclination change, and the like of the blade 140, which can be corrected through a control unit. Therefore, the thickness of the fluorescent liquid A applied to the film F on which the stage 110 is placed can be controlled with a precision within the thickness tolerance of +/- 0.5 mu m.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be takeners of ordinary skill in the art, And such variations are within the scope of the present invention.

110 ... stage 120 ... elevator
130 ... tilting robot 140 ... blade
141 ... Support protrusion 150 ... Origin sensor
151 ... Guide 160 ... Plate
161 ... slider 170 ... horizontal support
180 ... fixed block 181 ... guide groove
182 ... my cheek chin A ... Fluorescent liquid
F ... film

Claims (5)

A stage on which a film to be injected with the fluorescent liquid is placed and is installed so as to be reciprocally movable forward and backward;
An elevator installed apart from the upper portion of the stage;
A tilting robot installed to be able to move up and down through the elevator;
A blade coupled to the tilting robot so as to be adjustable in the left and right direction and lowered together with the tilting robot to which a lower force is applied from the elevator so as to apply a fluorescent fluid applied to the film to a predetermined thickness;
An origin sensor disposed on both sides of the stage and measuring the height of both lower ends of the blade;
A control unit for receiving height data of both lower ends of the blade from the origin sensor and controlling the operation of the tilting robot and the elevator in real time while keeping the height of the blade constant; And
And a guide which surrounds the side of the origin sensor and protects the origin sensor from an external impact. delete The method according to claim 1,
A fixed block having a guide groove formed in the left and right direction is fixed to the front of the tilting robot,
Wherein the blade is fastened with a bolt in a state of being fitted in a guide groove of a fixing block. The method of claim 3,
Wherein an inner edge taper is formed at a lower end of the guide groove and a support protrusion is formed at an upper end of the blade so as to be supported by the inner edge tucks to prevent the blade from being separated after the blade is slid into the guide groove. Apparatus for applying a fluorescent liquid. The method according to claim 1,
The elevator and the origin sensor are installed on the upper surface of the table,
And a slider for moving the stage in the forward and backward directions is provided at the center of the table.

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