KR20150066824A - Led illumination apparatus for vision inspection system - Google Patents

Abstract

Disclosed is an LED illumination apparatus for vision inspection equipment. The LED illumination apparatus for the vision inspection equipment according to an embodiment of the present invention comprises: a case having a sealed internal space; at least one light source unit fixed on the inner side of at least one board forming the internal space of the case, and having a substrate on which at least one LED module forming light is mounted, a reflection member coupled to the front side of the substrate to reflect the light while covering the at least one LED module, a lens coupled to the reflection member to condense the reflected light and a heat radiation member coupled to the rear side of the substrate to radiate the heat generated from the at least one light; and a light source control unit fixed on the inner side of the at least one board forming the inner space of the case to be located at a position lower than the light source unit, transforming an external power source in a driving power source for driving the at least one LED module to transmit the transformed power source to the LED module, and receiving either an analog control signal or a digital control signal from the outside to control at least one among the color, the brightness and the flickering speed of the at least one LED module.

Description

{LED ILLUMINATION APPARATUS FOR VISION INSPECTION SYSTEM FOR VISION INSPECTION EQUIPMENT}

[0001] The present invention relates to an LED lighting apparatus for vision inspection equipment, and more particularly, to a lighting apparatus for vision inspection equipment, which comprises a light source for providing illumination to a vision inspection equipment, which is to be miniaturized and integrated, To an LED lighting device for vision inspection equipment for applying power to the LED and controlling the operation of the LED.

In general, the inspection of semiconductors and display panels is switched to a method of automatically inspecting a human using a camera in a visual inspection, and automatic vision inspection equipment (Automatic Optical Inspection) has been developed and widely used.

 Vision Inspection System is a system to detect defect or defect in industrial field which is difficult to find by eye or general sensor by using camera, lens optics and a series of software algorithms to detect defects at high speed. It is a widely used system. The above-mentioned camera mainly uses an area scan camera for photographing a specific area and a line scan camera for photographing a straight line area. In order for the camera to function, a lighting device It is absolutely necessary.

As such a lighting device, a metal halide lighting device and an LED lighting device are used. The metal halide lamp uses a metal halide lamp as a light source, which has a lifetime of about 500 hours, a total luminous flux of about 4,500 lumens, and is controlled in an analog manner. The metal halide lighting device controls color and brightness with one channel and uses a color filter for R (Red) / G (Green) / B (Blue) color control in one channel. However, since the metal halide lamp has a lifetime of about one month and the price is about 500,000 won, there arises a problem that the maintenance cost of the metal halide lamp lighting device is high.

An LED lighting device is proposed as an alternative to such a metal halide lighting device. These LED lighting devices use LEDs as light sources, with LEDs having a life span of 20,000 hours, total luminous flux of about 4,800 lumens, and are controlled in an analog manner. Conventional LED lighting devices use color filters to control color and brightness with one channel and R / G / B color control with one channel. Conventional LED lighting devices have a structure in which a LED, which is a light source, is mounted on a MCPCB (heat sink mounted printed circuit board) with a power chip and a lens is mounted on the front of the LED. However, in the conventional LED lighting device, due to the heat dissipation of the LED, a weak lens may melt, and a yellowing phenomenon occurs around the power chip (LED) due to the problem of MCPCB heat dissipation, which causes a fatal defect in the life of the power chip (LED) .

Meanwhile, as the semiconductor display process technology is miniaturized, the illumination device for inspection must be changed to fine control in response to this. In the conventional LED lighting device, the brightness and color of the LED are controlled through the analog control method, It is a fact that I can not.

A prior art related to the present invention is Korean Patent Publication No. 10-2013-0094883 (published on Aug. 27, 2013).

Instead of using metal halide lamps, which are used as light sources for vision inspection equipment, LEDs can be controlled not only by analog control method but also by digital control method, so that LED brightness, color and lighting A LED lighting device for vision inspection equipment capable of finely controlling the speed, etc. is proposed.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems that are not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an LED lighting apparatus for a vision inspection equipment, comprising: a case having a closed inner space; A substrate mounted on at least one LED module which is fixed inside at least one plate member forming an inner space of the case and forms light, a light emitting diode At least one light source unit including a reflecting member for reflecting light, a lens coupled to the reflecting member to condense the reflected light, and a heat radiating member coupled to a rear surface of the substrate to emit heat generated in the at least one LED module; And at least one plate member formed in an inner space of the case to be positioned below the position of the light source unit and adapted to convert an external power source into a driving power source for driving the at least one LED module, And a light source control unit for receiving at least one of an analog control signal and a digital control signal from outside to control at least one of color, brightness, and flicker speed of the at least one LED module.

The at least one LED module may be of the SMD type.

And an analog signal input terminal (D-sub) for receiving the analog control signal may be provided on the front surface of the case.

And a digital signal input terminal (USB) for receiving the digital control signal may be provided on a front surface of the case.

The reflective member may be made of any one of metal, non-metal, ceramic, and plastic materials.

The surface of the reflective member may be coated with silver or aluminum.

The at least one LED module may comprise red, green, blue, and white (RGBW) LEDs.

And an external mounting unit on which at least one LED lighting lamp for vision inspection equipment other than the light source unit is mounted on an outer surface of the case.

According to the LED lighting apparatus for vision inspection equipment according to the embodiment of the present invention, instead of the metal halide lamp used as the light source of the illumination of the vision inspection equipment, LEDs are used instead of the analog control method as well as the digital control method The brightness, color, and lighting speed of the LED can be finely controlled in response to the miniaturization of the semiconductor display process technology.

1 is a perspective view of an LED lighting apparatus for a vision inspection apparatus according to an embodiment of the present invention.
2 is a rear view of an LED lighting apparatus for vision inspection equipment according to an embodiment of the present invention.
3 is an exploded perspective view of a light source unit according to an embodiment of the present invention.
4 is a block diagram of a light source control unit according to an embodiment of the present invention.

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

Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the following embodiments. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an," and "the" include plural forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, regions and / or regions, it should be understood that these elements, components, regions, layers and / Do. These terms do not imply any particular order, top, bottom, or top row, and are used only to distinguish one member, region, or region from another member, region, or region. Thus, the first member, region or region described below may refer to a second member, region or region without departing from the teachings of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, embodiments of the present invention should not be construed as limited to any particular shape of the regions illustrated herein, including, for example, variations in shape resulting from manufacturing.

FIG. 1 is a perspective view of an LED lighting apparatus for vision inspection equipment according to an embodiment of the present invention, FIG. 2 is a rear view of an LED lighting apparatus for vision inspection equipment according to an embodiment of the present invention, and FIG. FIG. 4 is a block diagram of a light source control unit according to an embodiment of the present invention. Referring to FIG.

1 to 4, the LEd illumination apparatus for a vision inspection apparatus according to an embodiment of the present invention includes a case 1 having a closed inner space, at least one plate member 1 defining an inner space of the case 1, And at least one LED module (114) mounted on the substrate (115), wherein the at least one LED module (114) is mounted on the substrate (115) A lens 118 coupled to the reflective member 117 to condense the reflected light to the outside and a lens 118 coupled to the back surface of the substrate 115 to receive the at least one LED module 114, And a heat dissipating member 112 for radiating heat generated in the case 1 to the outside, and a heat dissipating member 112 for dissipating heat generated from the heat dissipating member 112 to the inside of at least one plate member formed in the inner space of the case 1 And an external power source Converts at least one LED module (114) into driving power for driving the LED module (114), applies the converted driving power to the LED module (114), receives at least one of an analog control signal and a digital control signal from the outside, And a light source control unit 13 for controlling at least one of a color, a brightness, and a blinking speed of the light source.

The LED lighting device for vision inspection equipment according to the embodiment of the present invention is replaced with an LED module formed of red, green, blue, and white (RGBW) diodes instead of the conventional metal halide lamp, Accordingly, unlike the lighting apparatus for vision inspection equipment using the conventional metal halide lamp, the LED lighting apparatus according to the embodiment of the present invention can be managed with a low maintenance cost.

In the LED lighting device according to the embodiment of the present invention, the lighting device using the conventional metal halide lamp and the lighting device using the conventional LED have one channel and perform color control using the color filter, It is possible to make the color control finer. This color control is controlled by an analog signal input through the analog signal input terminal (D-sub) 15 provided on the outer surface of the case 1 and the rear surface 19 of the case 1 in the accompanying drawings, 1 through the digital signal input terminal (USB) 18 provided on the rear surface 19 of the case 1 in the accompanying drawings. A joystick (not shown) may be connected to the analog signal input terminal 15, and the color control as well as the brightness control can be performed in an analog manner through the joystick. However, as the semiconductor display process technology is miniaturized, the color, brightness, and flickering speed of the light source for vision inspection of the semiconductor display must be controlled finely. Since the fine control of such a light source is limited by the analog signal input through the analog signal terminal 15, the LED lighting apparatus according to the embodiment of the present invention is capable of controlling at least the color, brightness, A digital signal input terminal 18 for inputting a digital signal for finely controlling one of the plurality of input signals can be provided on the rear surface 19 of the case 1. [

Accordingly, the light source control unit 13 controls the light source control unit 13 to use at least one of the illumination data used in the conventional semiconductor display process stored in the USB connected to the digital signal input terminal 18, for example, the color, brightness, At least one of the color, brightness, and flicker rate of one LED module 114 can be controlled. This control result is stored in the USB, and a database can be constructed.

A main power source on / off switch 3 for controlling the external power source to be applied to the light source control unit 13, a driving power source for supplying driving power to the light source control unit 13, A switch 7 for adjusting the red brightness of the LED module 114, a switch 8 for adjusting the brightness of green, a driving power source on / off switch 5 for controlling application of the blue A switch 9 for adjusting the brightness, and a switch 10 for adjusting the brightness of the white. The front surface 2 of the case 1 may be provided with an external mounting portion 6 on which at least one LED lighting lamp for vision inspection devices other than the light source portions 11 and 12 is mounted. On the rear face 19 of the case 1, a power source terminal 16 to which external power is applied is provided. The rear surface 19 of the case 1 is provided with a main power ON / OFF switch 17 functioning in the same manner as the main power ON / OFF switch 3 provided on the front surface 2 of the case 1. [ Accordingly, the main power ON / OFF switch is provided on the front and rear surfaces of the case 1, so that the user can easily control the external power source to be applied to the light source control unit 13. Also, the LED lighting apparatus according to the embodiment of the present invention may include a heat dissipation unit 14 for dissipating heat generated from at least one light source unit 11 to the outside.

The at least one light source unit 11 includes a substrate 115 on which at least one LED module 114 for forming light is mounted as shown in FIG. 3, A reflecting member 117 for reflecting the light while covering the LED module 114, a lens 118 coupled to the reflecting member 117 to condense the reflected light to the outside, A heat dissipating member 112 coupled to the LED module 114 to discharge heat generated from the at least one LED module 114 to the outside and an upper case 110 having a lower surface opened, And a light source unit case 110 for allowing the substrate 115, the reflection member 117, and the radiation member 112 to be positioned in an inner space formed by the light source unit 119. Since the light source unit 11 has a single set structure, the light source unit 11 can be easily attached to and detached from the case 1. [ Accordingly, when the intensity of the light source is weak, an additional light source unit can be additionally provided.

The at least one LED module 114 may be of the SMD type. The reflection member 117 may be made of any one material selected from the group consisting of metal, non-metal, ceramics and plastic, and the surface of the reflection member 117 may be coated with silver or aluminum. In this way, silver or aluminum is coated on the surface of the reflecting member 117, so that the reflectance of light can be increased.

As described above, the LED lighting device according to the embodiment of the present invention is a structure in which light is condensed by using an LED module and a reflective member, unlike a conventional LED lighting device that uses a power chip and a lens. So that yellowing phenomenon in which the edge of the lens generated in the LED illumination device for condensing light changes to yellow does not occur.

The LED lighting apparatus according to the embodiment of the present invention may be configured such that the light source unit 11 and the light source control unit 13 are separated from each other and mounted at different positions in the case 1, So that the heat generated in the light source control unit 13 does not affect the light source control unit 13.

If conventional metal halide lamps use a motor and turn the RGB filter to match the wavelength of the color, the present invention can digitally control the R / G / B chip, allowing the inspector to select the desired wavelength. That is, 2,560,000 color implementations and wavelength band implementations became possible.

If you want to use LED light source White / R / G / B, you can choose total light flux in white light source if you want total light flux. If you select wavelength, you can also select wavelength.

The LED lighting apparatus according to the embodiment of the present invention stores the inspection process recipe of the operator in the USB connected to the digital signal terminal so that the pattern of the pattern Generation programs.

The light source control unit 13 of the LED lighting apparatus according to the embodiment of the present invention controls at least the power function of applying power to the LED module 114 and the color, brightness, blinking speed, etc. of the at least one LED module 114 And has a configuration integrated with the control function.

The present invention has been described above with reference to the embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. Therefore, the scope of the present invention is not limited to the above-described embodiments, but should be construed to include various embodiments within the scope of the claims and equivalents thereof.

Claims (8)

In an LED lighting device for vision inspection equipment,
A case having a closed inner space;
A substrate mounted on at least one LED module which is fixed inside at least one plate member forming an inner space of the case and forms light, a light emitting diode At least one light source unit including a reflecting member for reflecting light, a lens coupled to the reflecting member to condense the reflected light, and a heat radiating member coupled to a rear surface of the substrate to emit heat generated in the at least one LED module; And
And at least one plate member formed in an inner space of the case is fixed to be positioned below the position of the light source unit and an external power source is converted into a driving power source for driving the at least one LED module and is applied to the LED module And a light source control unit for receiving at least one of an analog control signal and a digital control signal from outside to control at least one of color, brightness and blinking speed of the at least one LED module . The method according to claim 1,
Wherein the at least one LED module is of the SMD type. The method according to claim 1,
And an analog signal input terminal (D-sub) for receiving the analog control signal on an outer surface of the case. The method according to claim 1,
And a digital signal input terminal (USB) for receiving the digital control signal is disposed on an outer surface of the case. The method according to claim 1,
Wherein the reflective member is made of one of metal, non-metal, ceramic, and plastic. The method of claim 5,
And the surface of the reflective member is coated with silver or aluminum. The method according to claim 1,
Wherein the at least one LED module comprises red, green, blue, and white (RGBW) LEDs. The method according to claim 1,
And an external mounting part for mounting at least one LED lighting lamp for vision inspection devices other than the light source part on an outer surface of the case.

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