WO2017133178A1

WO2017133178A1 - Automatic optical inspection program-based touch panel automatic inspection apparatus

Info

Publication number: WO2017133178A1
Application number: PCT/CN2016/087928
Authority: WO
Inventors: 谢彦腾; 饶杰; 黄艳萍
Original assignee: 意力(广州)电子科技有限公司
Priority date: 2016-02-02
Filing date: 2016-06-30
Publication date: 2017-08-10
Also published as: CN107024475A; CN107024475B

Abstract

An automatic optical inspection program-based touch panel automatic inspection apparatus, comprising an apparatus housing (1) provided at the middle thereof with a first opening (17), a cabinet (2) provided within the apparatus housing (1), a display (3) fixed on the outer surface of the apparatus housing (1), and a control and processing mechanism. A testing platform (6) is provided within the first opening (17) of the apparatus housing (1) and is used for holding a product to be tested. The cabinet (2) is formed by joining a top wall (25), several sidewalls, and the testing platform (6). A camera (7) is fixed on the top wall (25) of the cabinet. A light source (8) is provided on the sidewalls of the cabinet. The control processing mechanism is electrically connected respectively to the display (3) and to the camera (7). Utilization of the automatic inspection apparatus replaces manual inspection of the appearance of a touch panel and is highly efficient, highly reliable, highly precise, and great in stability.

Description

Touch panel automatic detecting device based on automatic optical detecting program

Technical field

The invention relates to the technical field of detecting touch screen products, in particular to a touch panel automatic detecting device based on an automatic optical detecting program.

Background technique

With the rapid development of smart terminal products such as smart phones and tablet computers, the production volume and production type of touch screens for smart phones and tablet products have also increased greatly with the corresponding demands, which requires the quality inspection of the touch screen before leaving the factory. Efficient, fast and accurate. The quality inspection of the touch screen mainly includes two aspects, one is to detect whether the surface of the touch screen has scratches, dust, whether the inner surface is printed well or the like, and the other is to detect whether the touch screen is mixed in the mass production process (ie, in one Kinds of touch screen products mixed with other types of touch screen products), function key graphics or reserved holes (such as home button, return button, camera reserved hole, etc.) position printing offset.

At present, when detecting the appearance of the touch screen, it is generally compared by detecting the visual of the person, that is, the artificial comparison of the standard product and the product to be tested by the visual and intra-brain impression to judge the appearance problem. There are several problems with this method: first, the efficiency of manual detection is low, the error rate is high, and the missed detection rate is high. Second, the stability of the test results is poor, and the manual test is subjectively influenced by the tester. The experience and health status of the tester will affect the test results. Third, the detection accuracy is poor, and it is very difficult for the human to rely on the visual judgment to determine whether the position of the graphic on the touch screen is qualified. Because the distance of the distance, the offset of the angle will cause the visual effect to change, affecting the manual determination of the size and distance of the function key graphic by visual inspection.

Therefore, for touch screen manufacturers, it is necessary to develop a machine that can replace the appearance of manually detecting the touch screen to solve the above problems.

Summary of the invention

The technical problem to be solved by the present invention is to provide a touch panel automatic detecting device capable of replacing the appearance of a touch screen manually, which can accurately and efficiently detect whether the appearance of the touch screen product is qualified, whether there is a problem such as mixing, thereby improving the efficiency of the touch screen detection. And stability.

In order to solve the above technical problem, the present invention provides an automatic detection device for a touch panel based on an automatic optical detection program, comprising: a device housing having a first opening in a middle portion thereof, a housing disposed inside the housing of the device, and being fixed in the a display on the outer surface of the device housing, and a control processing mechanism; wherein the first opening of the device housing is internally provided with a test platform for placing a product to be tested, the case being composed of a top wall, a plurality of side walls, and the The test platform is formed by enclosing the camera, the top wall of the box is fixed with a camera, the side wall of the box is provided with a light source, and the control processing mechanism is electrically connected to the display and the camera respectively.

Further, the box body is a rectangular box body formed by a front side wall, a rear side wall, a left side wall, a right side wall, the top wall and the test platform, and the front side wall a distance between the lower edge and the test platform, such that a second opening is formed between the front sidewall and the test platform, and the second opening is disposed inside the first opening, and the first An opening is commonly used to accommodate the product to be tested.

Further, in the box, the light sources are four, which are respectively disposed on the front side wall, the rear side wall, the left side wall and the right side wall.

Further, in the box, the power of the light source is 15-30 W, and the value range of the power includes any specific point value, for example, the power of the light source is 15 W, 20 W, 25 W or 30 W.

Further, in the box, the light source is a strip light source, parallel to the test platform along its length direction, and the center line of the light source emitting light is also parallel to the test platform.

Further, in the box, the light emitted by the light source is white light.

Further, in the case, the light sources on the front side wall and the rear side wall are symmetrically disposed, which are the first group of light sources, the left side wall and the right side wall The light source is symmetrically disposed, and is a second group of light sources. The height of the first group of light sources from the test platform is greater than the height of the second group of light sources from the test platform.

Preferably, the height of the box is H, the height of the first group of light sources is 0.5H from the test platform, and the height of the second group of light sources from the test platform is 0.25H.

Further, the top surface of the box body and the inner surface of the side wall of the box body are affixed with a diffuse reflection material.

Preferably, the diffuse reflective material is a sponge glue.

Further, the rear side wall is a split door structure, and includes a first rear side wall connected to the left side wall and a second rear side wall connected to the right side wall.

Further, the control processing mechanism is provided with an automatic optical detection program for analyzing and processing the image result of the product to be tested captured by the camera, and feeding back the image result to the display.

Among them, Automatic Optical Inspection (AOI) refers to a method for obtaining an image of a measured object by optical imaging, processing and analyzing it by a specific processing algorithm, and comparing with a standard template image to obtain a defect of the measured object.

Further, the test platform is a blister positioning fixture for fixing the product to be tested.

Further, a lower portion of the front side panel is provided with a third opening, and a pedal is disposed in the third opening, and the foot pedal is electrically connected to the control processing mechanism for controlling the automatic Detect the device to turn on the detection work or stop the detection work.

Further, a working indicator light is provided on the device casing for indicating the working state of the automatic inspection device.

Further, the device housing is a rectangular outer casing formed by a front side panel, a rear side panel, a left side panel, a right side panel, a top panel and a bottom panel, and the first opening is opened on the front side panel. In the middle, the display is disposed on an outer surface of the front side panel.

Further, a support portion and/or a sliding portion are disposed under the bottom plate of the device housing.

Compared with the prior art, the beneficial effects are as follows:

Firstly, the touch panel automatic detecting device of the present invention can replace the manual appearance of the touch panel. Since the entire detecting process is completed by the combination of the device hardware and the software, the testing efficiency is high, the reliability is high, the precision is high, and the stability is good. Secondly, in the present invention, since the image of the product to be tested is analyzed by the automatic optical detecting program, the image quality of the image is very critical, which directly affects whether the automatic optical detecting program can accurately analyze it. To this end, the present invention conducts a large number of tests on a series of parameters such as the number, position, power, color and the like of the light source in the box, and at the same time explores the materials suitable for the interior of the box, and finally successfully forms a diffuse light source in the box body. The environment makes the image quality of the product to be tested taken by the camera higher, and the shadow pattern other than the product does not appear on the image, thereby ensuring that the image of the product to be tested can be applied to the automatic optical inspection program.

DRAWINGS

FIG. 1 is a schematic structural diagram of a touch panel automatic detecting device based on an automatic optical detecting program according to Embodiment 2.

2 is a schematic structural view of a touch panel automatic detecting device based on an automatic optical detecting program according to Embodiment 2 (the housing is omitted in the drawing).

3 is a schematic structural view of a box body of a touch panel automatic detecting device based on an automatic optical detecting program according to Embodiment 2.

4 is a schematic structural view of the box body of FIG. 3 omitting the front side wall, the right side wall, and the corresponding light source.

Figure 5 is a partial cross-sectional view of Figure 1.

detailed description

In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", The orientation or positional relationship indicated by "vertical", "horizontal", "transverse", "longitudinal" and the like is based on the orientation or positional relationship shown in the drawings, and is only used to explain the relative positional relationship between components or components. The specific mounting orientation of each component or component is not particularly limited.

Moreover, the above partial terms may be used to indicate other meanings in addition to the orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meaning of these terms in the present invention can be understood on a case-by-case basis.

In addition, the terms "installation", "setting", "providing", "connecting", and "connecting" should be understood broadly. For example, it may be a fixed connection, a detachable connection, or a one-piece construction; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or it may be two devices, components or components. Internal communication. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In addition, the terms "first", "second", etc. are used primarily to distinguish different components or components, and are not intended to indicate or imply the relative importance and quantity of the indicated components or components. Unless otherwise stated, "multiple" means two or more.

The technical solution of the present invention will be further described below with reference to the embodiments and the accompanying drawings.

Embodiment 1

The embodiment provides a touch panel automatic detecting device based on an automatic optical detecting program, including a device housing having a first opening in a middle portion thereof, a box body disposed inside the device housing, and being fixed on an outer surface of the device housing And a control processing mechanism; wherein the first opening of the device housing is internally provided with a test platform for placing a product to be tested, the box being formed by a top wall, a plurality of side walls and the test platform The top wall of the box body is fixed with a camera, the side wall of the box body is provided with a light source, and the control processing mechanism is electrically connected to the display and the camera respectively.

Embodiment 2

The embodiment provides a touch panel automatic detecting device based on an automatic optical detecting program. As shown in FIG. 1 and FIG. 3, the touch panel automatic detecting device includes a device housing 1, a box 2, and a display 3 for displaying a detection result. The work indicator light 4 for displaying the working state of the automatic detecting device, the foot pedal 5 for controlling the working state of the automatic detecting device, and the control processing mechanism (not shown).

As shown in FIGS. 1 and 2, the device casing 1 is a rectangular casing surrounded by a front side panel 11, a rear side panel 12, a left side panel 13, a right side panel 14, a top panel 15, and a bottom panel 16. A first opening 17 is defined in a middle portion of the front side plate 11 for accommodating a product to be tested, and a test platform 6 parallel to the top plate 15 is formed at a lower edge 171 of the first opening 17 toward the inside of the device casing. The test platform 6 is a plastic positioning fixture for positioning and fixing the product to be tested. In the present embodiment, in order to conveniently support or move the automatic detecting device, four support portions 18 and four sliding portions 19 are respectively provided at the four corners of the outer surface of the bottom plate 16.

The display 3 is disposed on the outer surface of the front side panel 11 of the device housing, and the lower edge of the display 3 is substantially at the same height as the upper edge 172 of the first opening 17. The work indicator light 4 is also disposed on the outer surface of the front side panel 11 of the device housing and is located on the left side of the display 3. Further, a third opening 51 is provided in a lower portion of the front side panel 11, and the foot board 5 is provided in a space inside the third opening 51. When the detecting personnel step on the pedal, the automatic detecting device starts the detecting work; when the detecting personnel releases the pedal, the automatic detecting device stops the detecting work.

As shown in FIG. 1 and FIG. 3, the casing 2 is a rectangular box formed by the front side wall 21, the rear side wall 22, the left side wall 23, the right side wall 24, the top wall 25 and the test platform 6. Wherein, a lower distance between the lower edge of the front side wall 21 and the test platform 5 is such that a second opening 26 is formed between the front side wall 21 and the test platform 5, and the second opening 26 is located inside the first opening 17 and The first opening is the same size and shape, and can cooperate with the first opening 17 for accommodating the product to be tested.

In the present embodiment, in order to more clearly show the structure inside the cabinet, the structure on the front side wall and the right side wall of the box body is omitted in FIG. 4, including the front side wall and the right side wall, and are respectively disposed on the front side. The light source on the wall and right side wall. As shown in FIG. 4, the rear side wall 22 is a split door structure, and the opening direction is toward the outside of the box. The rear side wall 22 includes a first rear side wall 221 hinged to the left side wall 23 and hinged to the right side wall 24. The second rear side wall 222, the first rear side wall 221 and the second rear side wall 222 can respectively rotate toward the outside of the box around the respective hinges, so that the rear side wall is opened, so that the detecting personnel can replace the components inside the box.

Further, in order to more clearly show the arrangement of the light source inside the casing, a partial sectional view of the casing is shown in Fig. 5, and the front side wall and the right side wall of the casing are omitted in Fig. 5. As shown in FIG. 3 and FIG. 5, a camera 7 is disposed at a central position of the top wall 25 of the cabinet. The lens of the camera is disposed toward the test platform 6 for taking a picture of the product to be tested placed on the test platform. In addition, in the present embodiment, four white light sources 8 having a power of 20 W are disposed, and the longitudinal direction thereof is parallel to the test platform 5, and the center line of the light emitted by the light source is also parallel to the test platform 5. The four light sources 8 are respectively fixed on the front side wall 21, the rear side wall 22, the left side wall 23, and the right side wall 24. The two light sources are symmetrically disposed, and the light sources disposed on the front side wall 21 and the rear side wall 22 are first. The group light source 81, and the light sources provided on the left side wall 23 and the right side wall 24 are a second group of light sources 82. In this embodiment, the height of the box is H, the height of the first group of light sources is 0.5H from the test platform, and the height of the second group of light sources is 0.25H from the test platform. Further, sponge rubber is attached to the inner surfaces of the front side wall 21, the rear side wall 22, the left side wall 23, the right side wall 24, and the top wall 25. Through the setting of the above-mentioned light source parameters and the attachment of the sponge on the inner surface of the box, the diffuse reflection environment of the light formed in the box provides a qualified shooting environment for the image quality of the camera to be tested, so that the image taken is only for the image. The product will not be shadowed by other images due to specular reflection, etc., and ultimately affect the accuracy of the image analysis by the control processing mechanism.

In addition, in the embodiment, the control processing mechanism is electrically connected to the light source, the camera, the display, the work indicator light, and the foot pedal, respectively, to control the operation of the above components. An automatic optical detection program is also embedded in the control processing mechanism for analyzing and processing the image result of the product to be tested taken by the camera, and feeding back the image result to the display. It can be understood that, in the present invention, the control processing mechanism is used for controlling the operation of the light source, the camera, the display, the work indicator light, and the foot pedal, and the automatic optical inspection program is used to judge whether the appearance of the product to be tested is qualified or not, and whether it belongs to the same product. To achieve the purpose of detection. The control processing mechanism may be disposed inside the device casing to save space and compact the overall structure of the device, for example, disposed on the left side inside the third opening 51 in FIG. 1, or may be disposed outside the device casing as long as it can be implemented The electrical connection of other components is sufficient. It is worth noting that in the present invention, when the image of the product to be tested is analyzed and processed by the automatic optical inspection program, the image quality is required to be high. If an image other than the product to be tested appears in the image, the image is automatically optically detected. Analyze the accuracy of the results. Therefore, the inventors conducted extensive research and comparative experiments on the setting parameters of the light source in the box and the materials attached to the inner surface of the case.

Comparative example one

The difference between this comparative example and the second embodiment is that, in the present comparative example, six light sources are disposed inside the box, wherein two light sources are respectively fixed to the front side wall and the rear side wall, and two of the other four light sources are fixed. On the left side wall, the other two are fixed on the right side wall.

Comparative example two

The present comparative example differs from the second embodiment only in that, in the present comparative example, two light sources are disposed inside the casing, and the two light sources are respectively fixed on the left side wall and the right side wall.

Comparative example three

The present comparative example differs from the second embodiment only in that, in the present comparative example, the light source power inside the casing is 10 W.

Comparative example four

The present comparative example differs from the second embodiment only in that, in the present comparative example, the light source power inside the cabinet is 50 W.

Comparative example five

The present comparative example differs from the second embodiment only in that, in the present comparative example, four light sources are fixed to the top wall of the casing, and the center line of the light source emitting the light source is perpendicular to the test platform.

Comparative example six

The present comparative example differs from the second embodiment only in that, in the present comparative example, two of the four light sources are fixed to the front side wall, and the other two are fixed to the rear side wall, on the left side wall and the right side. There is no light source on the wall.

Comparative example seven

The present comparative example differs from the second embodiment only in that, in the present comparative example, the light source is obliquely disposed toward the test platform, and the angle between the center line of the light source and the test platform is 45°.

Comparative example eight

The present comparative example differs from the second embodiment only in that, in the present comparative example, the light source is obliquely disposed toward the top wall of the casing, and the angle between the center line of the light source and the test platform is 135°.

Comparative example nine

This comparative example differs from the second embodiment only in that the light source is yellow light in the present comparative example.

Comparative ten

The present comparative example differs from the second embodiment only in that, in the present comparative example, the height of the first group of light sources from the test platform is 0.75H, and the height of the second group of light sources from the test platform is 0.5H.

Comparative eleven

The present comparative example differs from the second embodiment only in that, in the present comparative example, the inner surface of the front side wall, the rear side wall, the left side wall, the right side wall, and the top wall of the box are affixed with polychlorinated chlorine. Vinyl film.

Effect test

Using the automatic detection equipment of the second embodiment and the first to eleventh examples, the products to be tested are photographed, and the image of the product to be tested after the shooting is analyzed. The results are shown in Table 1 below:

Table 1

Automatic detection device Shooting the image of the product to be tested

Embodiment 2 The image of the product to be tested is clear and has no shadow

Comparative Example 1 A shadow appears in the image of the product to be tested

Comparative example 2 Shadows appear in the image of the product to be tested

Comparative example 3 Shadows appear in the image of the product to be tested

Comparative Example 4 Shadows appear in the image of the product to be tested

Comparative Example 5 Shadows appear in the image of the product to be tested

Comparative example Six shadows appear in the image of the product to be tested

Comparative Example 7 Shadows appear in the image of the product to be tested

Comparative Example 8 Shadows appear in the image of the product to be tested

Comparative Example 9 Shadows appear in the image of the product to be tested

Comparative example ten shadows appear in the image of the product to be tested

Comparative Example 11 Shadow appears in the image of the product to be tested

Through the above comparative experiments, it can be seen that in the present invention, the set number of the light source, the power, the color of the light, the positional relationship between the light source and the test platform, and the height of the light source from the test platform are all obtained through a large number of experimental tests, and only In the present invention, the arrangement of the light source is combined with the diffuse reflection material attached to the surface of the casing to form an ideal diffuse reflection environment, so that the image captured by the camera does not generate shadows other than the product to be tested. The automatic image inspection program is used to accurately process the sample image for processing, and the correct analysis result is obtained.

When the touch panel automatic detecting device of the present invention detects the appearance of the touch panel product, the detecting personnel first puts the product to be tested (ie, the touch panel product to be tested) into the test platform, and then presses the foot pedal with the foot, and the camera inside the box That is, the product to be tested is photographed, and after the image of the image of the product to be tested is analyzed and processed by the control processing mechanism, the analysis result of the image of the product to be tested is displayed on the display to realize the appearance detection of the product to be tested.

Claims

A touch panel automatic detecting device based on an automatic optical detecting program, comprising: a device casing having a first opening in a middle portion thereof; a casing disposed inside the casing of the device, and being fixed on an outer surface of the casing of the device And a control processing mechanism; wherein the first opening of the device housing is internally provided with a test platform for placing a product to be tested, the box being formed by a top wall, a plurality of side walls and the test platform The top wall of the box body is fixed with a camera, the side wall of the box body is provided with a light source, and the control processing mechanism is electrically connected to the display and the camera respectively.
The touch panel automatic detecting device according to claim 1, wherein the box body is surrounded by a front side wall, a rear side wall, a left side wall, a right side wall, the top wall and the test platform. a rectangular box body, and a lower edge of the front side wall is spaced apart from the test platform, so that a second opening is formed between the front side wall and the test platform, the second The opening is disposed inside the first opening, and is used together with the first opening to accommodate the product to be tested.
The touch panel automatic detecting device according to claim 2, wherein the top surface of the box body and the inner surface of the side wall of the box are affixed with a diffuse reflection material.
The touch panel automatic detecting device according to claim 1, wherein in the box, the light source is four, and is disposed on the front side wall, the rear side wall, the left side wall, and the right side wall, respectively. on.
The touch panel automatic detecting device according to claim 1, wherein in the box, the light source is a strip light source, parallel to the test platform along a length thereof, and the light source emits light. The centerline is also parallel to the test platform.
The touch panel automatic detecting device according to claim 1, wherein in the casing, the light emitted by the light source is white light.
The touch panel automatic detecting device according to claim 1, wherein in the box body, the light sources on the front side wall and the rear side wall are symmetrically arranged to be a first group of light sources. The light source on the left side wall and the right side wall is symmetrically disposed, and is a second group of light sources. The height of the first group of light sources from the test platform is greater than the distance of the second group of light sources from the test platform. height.
The touch panel automatic detecting device according to claim 1, wherein the rear side wall is a split door structure, and includes a first rear side wall connected to the left side wall and connected to the right side wall. Second rear side wall.
The touch panel automatic detecting device according to claim 1, wherein the control processing mechanism is provided with an automatic optical detecting program for analyzing and processing the image result of the product to be tested photographed by the camera. And feed back the image results to the display.
The touch panel automatic detecting device according to claim 1, wherein a lower portion of the front side plate is provided with a third opening, and a pedal is provided in the third opening, the foot pedal and the foot The control processing mechanism is electrically connected to control the opening detection work of the touch panel automatic detecting device or stop the detecting work.