KR100787802B1 - Image test device of camera module and method of using the same - Google Patents

Abstract

The present invention relates to an apparatus for testing an image of a camera module, comprising: a support plate, an index table installed on a support plate and mounted on an upper surface thereof, and an image unit provided to face the camera module so as to face an image of the camera module. And a power supply unit for supplying power to the camera module and a controller for determining whether the image captured by the camera module is included in the reference value, thereby determining whether the camera module is defective by testing the image capturing performance of the camera module. There is an advantage to that.

Camera module, image test, image

Description

Image test device of camera module and method of using the same}

1 is a cross-sectional view showing an embodiment of a general camera module;

2a to 2e is a sequential cross-sectional view showing a manufacturing method of a general camera module,

3 is a schematic diagram schematically showing a camera module test system equipped with a fail sorting device according to the present invention;

4 illustrates an embodiment of an image test apparatus according to the present invention;

5 shows another embodiment of an image test apparatus according to the present invention;

6 is a flowchart illustrating an image test method according to the present invention.

<Brief Description of Major Codes in Drawings>

10; Camera module 11; Circuit board

12; Semiconductor die 13; Connecting member

14; Mount holder 15; Lens assembly

16; Adhesive 17; External terminal

200; Index table 202; Body

203; Radiation Arm 800: Image Testing Device
810: Image unit 811: Light box
840: power supply 830: color sensor
831: color sensor installation unit 870: control unit
880: alarm generator

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The present invention relates to an image test apparatus of an camera module and an image test method using the same, and more particularly, to an image test apparatus and an image test method of the camera module for testing an image captured by the completed camera module. .

Referring to FIG. 1, one example of a general camera module is shown in cross section. As shown, the camera module 10 includes a circuit board 11 and a semiconductor die 12 bonded to the circuit board 11 to convert an external image signal into an electrical signal, and the semiconductor die 12 and the circuit board. At least one connecting member 13 which electrically connects 11 to each other, a mount holder 14 fixed to the circuit board 11 as an outer periphery of the semiconductor die 12, and fixed to the mount holder 14; And an adhesive formed between the lens holder 15 and the mount holder 14 and the lens assembly 15 to have an appropriate focus and to transmit an external image to the semiconductor die 12 to prevent rotation of the lens assembly 15. And an external terminal 17 provided on one side of the circuit board 11 and electrically connected to the external device. In the figure, reference numeral 14a is a thread formed in the mount holder 14, and 15a is a thread formed in the lens assembly 15.

Here, although the external terminal 17 is illustrated as being formed on the upper surface of the circuit board 11 in FIG. 1, it may be formed on the lower surface of the circuit board 11. In addition, the shape, shape and length of the circuit board 11 from the mount holder 14 to the external terminal 17 can be variously changed.

2A-2E, a general method of manufacturing a camera module is shown in cross section.

As shown, the manufacturing method of the camera module 10 includes a circuit board providing step, a die bonding / wire bonding step, a mount holder fixing step, a lens assembly coupling step, and an adhesive dispensing step. This is explained in more detail.

First, as shown in FIG. 2A, in the step of providing a circuit board, a circuit board 11 having an external terminal 17 formed on one side thereof is provided. Here, although the external terminal 17 is formed on the upper surface of the circuit board 11 as an example, as described above, the external terminal 17 may be formed on the lower surface of the circuit board 11. In addition, the external terminal 17 may be formed in other steps below, rather than providing the circuit board 11.

Subsequently, in the die bonding / wire bonding step, as shown in FIG. 2B, the semiconductor die 12 is adhered to a predetermined region of the circuit board 11, and then the semiconductor die 12 and the circuit board 11 are bonded to at least one of them. Bonding with the connecting member (13).

Subsequently, in the mount holder fixing step as shown in FIG. 2C, the hollow mount holder 14 is mounted on the upper surface of the circuit board 11, which is the outer circumference of the semiconductor die 12 and the connecting member 13. Here, the mount holder 14 may be formed with a plurality of threads (14a) on the inner diameter surface.

Subsequently, in the lens assembly coupling step, as illustrated in FIG. 2D, the lens assembly 15 having a plurality of threads 15a formed on the outer diameter surface thereof is screwed to the mount holder 14. At this time, the lens assembly 15 is stopped during the rotation in the predetermined direction for screwing the rotation at the angle at which the focus is best. In addition, an open short test and an image test are also performed to confirm whether the camera module 10 operates correctly and correctly recognizes an external image.
The image test is performed by taking an image of a predetermined color with a camera module and comparing it with a standard image. That is, if the image photographed by the camera module is similar to the standard image, it is shipped as a normal product. If the image photographed by the camera module is different from the standard image, it is determined as a defective product.
However, such an image test method is performed by the human eye, and there is a variation for each worker, and the standard of normal and failure may vary according to the worker's mood. Furthermore, there is a problem in that an image test time is also required by an operator taking an image of a predetermined color with a camera module and comparing it with a standard image.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an image test apparatus and an image test method of the camera module for quickly and automatically testing an image captured by a completed camera module. To provide.

The present invention for achieving the above object is provided with a support plate, an index table which is installed on the support plate at the same time the camera module is mounted on the upper surface, the image is provided opposite to the camera module is provided with an image to be photographed by the camera module And a power supply unit for supplying power to the camera module, and a controller for determining whether an image captured by the camera module is included in a reference value.

One side of the image unit is preferably provided with a color sensor.

The color sensor is opposed to the image part by a rotating driver provided on one side of the image part, a rotating shaft rotated by the rotating driving part, and a rotating plate connected to the rotating shaft and rotated at a predetermined angle by the rotation of the rotating shaft. It is good to be arranged.

The controller compares a color sensor image value of the image portion captured by the color sensor with a camera module image value of the image portion captured by the camera module to determine whether the camera module image value is out of an error range of the color sensor image value. You can judge.

The controller may include an alarm generator configured to generate an alarm when the camera module captured value is out of an error range of the color sensor captured value.

 The image unit may be a light box representing an image by emitting light, and the light box may emit one of red, green, blue, and white images.

The camera module includes a circuit board, a semiconductor die bonded to an upper surface of the circuit board, at least one connecting member electrically connecting the circuit board and the semiconductor die, and a mount holder fixed on a circuit board that is an outer circumference of the semiconductor die. And an external terminal formed on one surface selected from an upper surface or a lower surface of the circuit board screwed to the mount holder and the circuit board spaced apart from the mount holder by a predetermined distance.

The index table is coupled to the index drive unit fixed to the support plate, the axis of rotation of the index drive unit, and at the same time extends a predetermined length in the outward direction from the circumference of the body and the body rotated by an angle at the top of the support plate, It has a predetermined pitch along the circumference of the body, the end may include at least one radiation arm on which the camera module is seated.

The radiation arm may include a seating groove having a predetermined depth in which the camera module is seated, and a seating block in which a back hole for adsorbing the camera module is formed.

 The power supply unit may be installed on an upper surface of the support plate, which is an outer circumference of the index table, to supply power to the camera module.

The power supply unit may be installed on the bottom surface of the support plate.

The seating block is further formed with a first through-hole at a position spaced apart from the back hole, the radiation arm is further formed with a second through-hole at a position corresponding to the first through-hole of the seating block, the support plate is The third through hole may be further formed at a position corresponding to the first through hole and the second through hole.

In addition, the present invention comprises the steps of seating the camera module on the index table equipped with a color sensor, a predetermined image appears in the image portion located above the camera module, supplying power to the camera module; The camera module and the color sensor photographing an image shown in the image part, the color sensor photographing an image shown in the image part, and comparing the values captured by the camera module and the color sensor. And an alarm generator when the captured image value captured by the camera module is out of an error range of the captured image value captured by the color sensor.

The present invention provides a method of storing image values of an image portion captured by a color sensor, mounting a camera module on an index table, and displaying a predetermined image on an image portion located above the camera module. Supplying power to the camera module, photographing an image displayed by the camera module on the image unit, comparing a value photographed by the camera module and the color sensor, and photographing captured by the camera module When the value is out of the error range of the image value captured by the color sensor provides an image test method of the camera module comprising operating an alarm generator.

Hereinafter, an image test apparatus of a camera module according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic view showing a camera module test system equipped with a fail sorting device according to the present invention, and FIG. 4 is a view showing an embodiment of an image test device according to the present invention.

5 is a diagram illustrating another embodiment of an image test apparatus according to the present invention, and FIG. 6 is a flowchart illustrating an image test method according to the present invention.

As shown in these drawings, the image test apparatus 800 of the camera module 10 is installed on the support plate 205 and the support plate 205 and at the same time the index table 200 on which the camera module 10 is mounted on the upper surface. The reference value includes an image unit 810 including an image to be captured by the camera module 10, a power supply unit 840 for supplying power to the camera module 10, and an image captured by the image unit 810. It includes a control unit 870 for determining whether or not.

 First, the camera module 10 is bonded to the circuit board 11, the circuit board 11, the semiconductor die 12 for converting the external image signal into an electrical signal, the semiconductor die 12 and the circuit board 11 ) At least one connecting member 13 electrically connecting each other, a mount holder 14 fixed to the circuit board 11 as an outer periphery of the semiconductor die 12, and fixed to the mount holder 14 so that A lens assembly 15 having focus and allowing an external image to be transferred to the semiconductor die 12, and an adhesive 16 formed between the mount holder 14 and the lens assembly 15 to prevent rotation of the lens assembly 15. ) And an external terminal 17 provided on one side of the circuit board 11 and electrically connected to an external device. In the figure, reference numeral 14a is a thread formed in the mount holder 14, and 15a is a thread formed in the lens assembly 15.

Here, although the external terminal 17 is illustrated as being formed on the upper surface of the circuit board 11 in FIG. 1, it may be formed on the lower surface of the circuit board 11. In addition, the shape, shape and length of the circuit board 11 from the mount holder 14 to the external terminal 17 can be variously changed.

The index table 200 has a body 202 which is rotated by a predetermined angle in a clockwise direction by the index driver 201, and a radiation formed having a predetermined pitch while extending a predetermined length outward from the circumference of the body 202. Arm 203. Of course, the camera module 10 is mounted on the radiation arm 203 and various tests are performed. Here, the index table 200 may also rotate in the counterclockwise direction, and the present invention is not limited to the rotation direction.

The radiation arm 203 is provided with a seating member 204 and a seating groove 204a on which the camera module 10 can be seated. The seating groove 204a forms a step inwardly of the radiation arm 203 according to the shape of the camera module 10 so that the camera module 10 is inserted into the seating groove 204a so that the camera module 10 is shaken. It is formed to prevent it. Here, the mounting groove 204a is formed with a back hole (not shown) for adsorbing the camera module 10.

When the radiation arm 203 on which the camera module 10 is seated is rotated and positioned at a predetermined position, the image unit 810 is moved to face the camera module 10 so that the camera module 10 captures an image to be captured. Have Here, the image unit 810 may be a light box 811, and the light box 811 emits one of the selected images among red, green, blue, and white. In addition, when the light box 811 is turned off, the image may be black.

The image unit 810 is moved to a position opposite to the camera module 10 by the image moving unit 820 installed on one side. That is, the image moving unit 820 includes an X axis moving block 821, a Y axis moving block 823, and a Z axis moving block 825.

The X-axis moving block 821 is provided with an X-axis base 821a on the upper surface of the support plate 205, and an X-axis rail 821b is provided on the X-axis base 821a. The X-axis rail 821b is provided with a Y-axis base 823a moving in the X-axis direction by an X-axis motor 821c fixed to the X-axis base 821a. A Y-axis rail 823b is provided on the Y-axis base 823a. In addition, the Y-axis rail 823b is provided with a Z-axis base 825a moving in the Y-axis direction by the Y-axis motor 823c fixed to the Y-axis base 823a. The Z-axis rail 825b is installed on the Z-axis base 825a. Further, the Z-axis rail 825b is provided with a moving member 827 moving in the Z-axis by the Z-axis motor 825c fixed to the Z-axis base 825a. By this configuration, the image unit 810 connected to the moving member 827 can move in the X-axis, Y-axis, and Z-axis directions.

The color sensor installation unit 831 is provided at one side of the image unit 810. That is, the color sensor installation unit 831 is connected to the image unit 810 and consists of a rotary shaft 835 rotated by the rotary drive unit 833 and a rotary plate 837 connected to the lower side of the rotary shaft 835. Here, the color sensor 830 is installed on the upper surface of the rotating plate 837.

The power supply unit 840 is electrically connected to the external terminal 17 of the camera module 10 to supply power to the camera module 10. The camera module 10 is operated by the camera module 10 by operating the camera module 10. Allows imaging of the image shown at 810. Thus, the first through hole 204b may be further formed inside the seating block 204 at a position spaced apart from the back hole by a predetermined distance. The first through hole 204b is a lower region corresponding to the external terminal 17 of the camera module 10. That is, the external terminal 17 of the camera module 10 may be formed on any surface of the upper side and the lower side of the camera module 10. Therefore, when the external terminal 17 of the camera module 10 is formed on the bottom surface, the radiation arm 203 on which the seating block 204 is seated is electrically connected to the power supply unit 840 through the first through hole 204b. ), A second through hole 203a is further formed in an area corresponding to the first through hole 204b, and a third through hole 205a is further formed in the support plate 205a corresponding to the second through hole 203a. Can be formed.

The controller 870 is used to determine whether the camera module captured value of the image unit 810 in which the camera module 10 is opposite to the reference value is included in the reference value, and the image unit 810 in the camera module 10. It is possible to determine whether the camera module 10 is defective by determining whether the captured value of the camera module photographed by the color sensor 830 is outside the error range of the color sensor captured value captured by the color sensor 830.

Here, the image test apparatus 800 of the camera module according to the present invention does not include a separate color sensor 830 as another embodiment, and controls the image sensor image value captured by the color sensor 830 in an initial state. After inputting in advance to the 870, it is possible to determine whether the camera module 10 is defective by comparing the input color sensor image with the camera module image captured by the camera module 10.

Thus, the controller 870 may further include an alarm generator 880 that is operated by receiving a signal from the controller 870 when the camera module captured value is out of an error range of the color sensor captured value.

 By the above configuration, the image test apparatus 800 of the camera module according to the present invention operates as follows.

First, the radiation arm 203 installed in the index table 200 seats the camera module 10 in the seating groove 204a of the seating block 204, and is then rotated at a predetermined angle and positioned at a predetermined position. (S1410)

Next, the image unit 810 is moved in the X, Y, and Z directions by the image moving unit 820 having the X, Y, and Z moving blocks 821, 823, and 825 so that the light box 811 of the image unit 810 is the camera. It is arranged to face the module 10.

When the camera module 10 and the light box 811 are disposed to face each other, the light box 811 is operated to represent any one of red, green, blue, white, and black. That is, in the case of red, green, blue, and white, the light box 811 emits the corresponding color, and in the case of black, the light box 811 does not emit the light and maintains black. (S1420)

Next, power is supplied to the camera module 10 by the power supply unit 840. Here, as illustrated in FIG. 4, when the external terminal 17 to be supplied with power is installed on the upper side of the camera module 10, the power supply unit 840 supplies power through the external terminal 17 exposed upward. Supply. As shown in FIG. 5, when the external terminal 17 to be supplied with power is installed under the camera module 10, the power supply unit 840 includes a seating block 204, a radiation arm 203, and a support plate 205. Power is supplied by exposing the external terminal 17 downward through the first, second, and third through holes 204b, 203a, and 205a respectively formed in the bottom portion.

When power is supplied to the camera module 10, the camera module 10 captures an image displayed on the light box 811 and transmits the camera module captured value to the controller 870.

Next, the power supply is interrupted to the camera module 10 which captured the image shown in the light box 811, and the color sensor installation unit 831 installed on one side of the image unit 810 is operated. That is, the color sensor driver 833 rotates the rotating shaft 835 to rotate the rotating plate 837 provided with the color sensor 830, and the rotating plate 837 faces the color sensor 830 and the image unit 810. Location.

Next, the color sensor 830 captures the same image as the camera module 10, and transmits the color sensor captured value to the controller 870.

Here, the color sensor 830 may image the image of the image unit 810 before starting the inspection of the camera module 10 and input the color sensor image to the controller 870 in advance. (S1430)

Next, the controller 870 compares the color sensor captured value with the camera module captured value. That is, since the color sensor captured value becomes a standard, it is determined whether the camera module captured value is out of an error range of the color sensor captured value.

Next, if the camera module captured value does not deviate from the error range of the color sensor captured value, the camera module 10 is determined to be normal (S1450).

If the camera module image value is out of the error range of the color sensor image value, the control unit 870 transmits an operation signal to the alarm generator 880 to operate the alarm generator 880, the camera module 10 in the image test It becomes bad. (S1460)

According to the present invention, the image test apparatus of the camera module has an advantage of determining whether the camera module is defective by testing the image pickup performance of the camera module.

Accordingly, the camera module has an advantage that the production yield is increased.

What has been described above is only one embodiment for implementing the image test apparatus of the camera module according to the present invention, the present invention is not limited to the above-described embodiment, the invention as claimed in the following claims Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

Claims (17)

Support plate; An index table installed on the support plate and at the same time seating the camera module on an upper surface thereof; An image unit installed to face the camera module and including an image to be captured by the camera module; A power supply unit supplying power to the camera module; And And a controller configured to determine whether an image captured by the camera module is included in a reference value. The method of claim 1, An image test apparatus of the camera module, characterized in that a color sensor is provided on one side of the image unit. The method of claim 2, The color sensor may include a rotation driving unit provided at one side of the image unit; A rotating shaft rotated by the rotating driver; The image test apparatus of the camera module, it characterized in that it is disposed opposite to the image portion by a rotating plate which is connected to the rotating shaft and rotated by a predetermined angle by the rotation of the rotating shaft. The method of claim 2, The controller compares a color sensor image value of the image portion captured by the color sensor with a camera module image value of the image portion captured by the camera module to determine whether the camera module image value is out of an error range of the color sensor image value. Image test apparatus of the camera module, characterized in that the judging. The method of claim 4, wherein The controller may include an alarm generator configured to generate an alarm when the camera module captured value is out of an error range of the color sensor captured value. The method of claim 1, And the image unit is a light box that displays an image by emitting light. The method of claim 6, The light box is an image test device of the camera module, characterized in that for emitting an image of any one of red, green, blue or white. The method of claim 1, The camera module comprises a circuit board; A semiconductor die bonded to an upper surface of the circuit board; At least one connecting member electrically connecting the circuit board and the semiconductor die; A mount holder fixed on a circuit board which is an outer circumference of the semiconductor die; A lens assembly screwed to the mount holder; And And an external terminal formed on one surface selected from an upper surface or a lower surface of the circuit board spaced apart from the mount holder by a predetermined distance. The method of claim 1, The index table may include an index driver fixed to the support plate; A body coupled to the axis of rotation of the index drive unit and rotating at a predetermined angle on an upper portion of the support plate; And An image of a camera module, comprising at least one radiation arm extending a predetermined length outwardly from a circumference of the body, having a predetermined pitch along the circumference of the body, and at the end of which the camera module is seated. Testing device. The method of claim 9, The radiation arm is provided with a seating groove having a predetermined depth in which the camera module is seated, and the seating recess is further provided with a seating block having a back hole for adsorbing the camera module. The method of claim 10, The power supply unit is installed on the upper surface of the support plate that is the outer periphery of the index table, the image test apparatus of the camera module, characterized in that to supply power to the camera module. The method of claim 10, The power supply unit is an image test apparatus of the camera module, characterized in that installed on the lower surface of the support plate. The method of claim 12, The seating block is an image test apparatus of the camera module, characterized in that the first through-hole further formed at a position spaced apart from the back hole. The method of claim 13, And a second through hole is formed in the radiation arm at a position corresponding to the first through hole of the seating block. The method of claim 14, The support plate is an image test apparatus of the camera module, characterized in that the third through hole is further formed in a position corresponding to the first through hole and the second through hole. Mounting a camera module on an index table on which a color sensor is mounted; Displaying a predetermined image on an image unit located above the camera module; Supplying power to the camera module; Capturing an image displayed on the image unit by the camera module and the color sensor; Comparing values photographed by the camera module and the color sensor; And And operating an alarm generator when an image picked up by the camera module is out of an error range of the image picked up by the color sensor. Storing the captured values of the image portion picked up by the color sensor; Mounting a camera module on an index table; Displaying a predetermined image on an image unit located above the camera module; Supplying power to the camera module; Photographing, by the camera module, an image displayed on the image unit; Comparing values photographed by the camera module and the color sensor; And And operating an alarm generator when an image picked up by the camera module is out of an error range of the image picked up by the color sensor.

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