CN212674088U

CN212674088U - Light guide plate appearance detection tool

Info

Publication number: CN212674088U
Application number: CN202021996017.4U
Authority: CN
Inventors: 万英伟; 沈浩; 尹建群; 张东东; 宋培华
Original assignee: Lei Ao Vision Technology Dongguan Co ltd
Current assignee: Lei Ao Vision Technology Dongguan Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-03-09
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses a light guide plate appearance detection jig, which comprises a bottom plate and a jig plate fixedly arranged on the bottom plate, wherein the jig plate is constructed into a vacuum adsorption structure, the upper surface of the jig plate is provided with adsorption holes, and the bottom plate is provided with a light source; the light source is located at one end of the jig plate and is parallel to the end portion of the jig plate, the emergent light of the light source is parallel to the upper surface of the jig plate and is higher than the upper surface of the jig plate, and the height of the emergent light exceeding the upper surface of the jig plate is matched with the thickness of the light guide plate to be detected. The modular structure satisfies the tool and removes detection and installation demand, and automatic check out test set of cooperation that can be better adopts unique light source position and light source leaded light piece structural design etc. simultaneously, improves detection efficiency and testing result reliability greatly.

Description

Light guide plate appearance detection tool

Technical Field

The utility model relates to a liquid crystal display spare part detects technical field, concretely relates to light guide plate outward appearance detection tool.

Background

The backlight module is one of the key components of the liquid crystal display panel, and has the function of supplying sufficient light source with uniform brightness and distribution, so that the backlight module can normally display images. The light guide plate of the mobile phone is used as an important part of a backlight module of the mobile phone, has the functions of guiding the scattering direction of light, improving the brightness of a panel and ensuring the uniformity of the brightness of the panel, is formed by high-precision injection molding, has strict appearance and size requirements, and particularly has the function of directly influencing the overall quality of the light guide plate due to the light scattering effect of a point surface of the light guide plate.

The detection of the light guide plate dotting surface is generally carried out by putting a worker on a jig, irradiating light from different angles, identifying and detecting by naked eyes, working for a long time, easily causing visual damage to the worker, having higher requirements on the skill and experience of the worker, causing relatively lower detection efficiency, being difficult to ensure good detection quality and not meeting the requirement of mass production, and some detection jigs, such as the invention patent with the publication number of CN105572145B and named as light guide plate detection jig, are also appeared on the market, mainly changing the inclination angle of the light guide plate by adjusting the angle of the jig to reduce the damage to the detector and reduce the detection errors caused by the fuzzy vision of the detector, but because light is directly incident to the surface of the light guide plate in an inclined posture, a light and dark area is easily formed in the light guide plate, thereby causing an influence on the detection result and increasing the detection error.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a light guide plate outward appearance detection tool to improve light guide plate detection efficiency and detection precision etc..

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a light guide plate outward appearance detection tool which the key lies in: the jig plate is fixedly arranged on the bottom plate, is constructed into a vacuum adsorption structure, and is provided with adsorption holes on the upper surface;

the light source is located at one end of the jig plate and is parallel to the end portion of the jig plate, the emergent light of the light source is parallel to the upper surface of the jig plate and is higher than the upper surface of the jig plate, and the height of the emergent light exceeding the upper surface of the jig plate is matched with the thickness of the light guide plate to be detected.

Scheme more than adopting, will wait to examine the light guide plate and place on the tool board during detection, and rely on the vacuum adsorption hole to adsorb it, fully guarantee its stability, make its automatic detection mechanism that can adapt to removal scanning detection, the light source is incident from the tip of light guide plate simultaneously, and the tradition is with the incident from the light guide plate surface of slope mode, can make the light source propagate more evenly stably in the light guide plate, be favorable to improving detection efficiency and testing result reliability, the tool main part comprises bottom plate and tool board in addition, can be better be connected or install with actuating mechanism through the bottom plate, satisfy tool removal demand, and the tool board then satisfies the demand of placing of light guide plate, can not cause the damage because of being too hard to the light guide plate, adapt to automatic detection needs.

Preferably, the method comprises the following steps: the utility model discloses a light source light guide plate, including tool board, light source leaded light piece, cover plate, light source leaded light piece, tool board, light source light guide plate, light source leaded light piece, cover plate front side and light source leaded light piece's front side flush. Scheme more than adopting, send light to the light source through light source leaded light piece and carry out dodging, disperse the light source promptly, change the point beam light of light source into the plain noodles to incide the light guide plate in more even mode, and only can follow the tip and incide, thereby avoid the light and shade between the light to alternate and influence the testing result, can also play the effect of reinforcing luminous intensity simultaneously, be favorable to further improving the testing result precision.

Preferably, the method comprises the following steps: the bottom plate is provided with a sinking platform A and a sinking platform B which are distributed along the length direction of the bottom plate, wherein the sinking platform B is higher than the sinking platform A, a step part is arranged between the sinking platform A and the sinking platform B, the jig plate is fixedly arranged in the sinking platform A, a radiator is arranged in the sinking platform B, the light source is positioned between the radiator and the light guide sheet of the light source, and the rear side of the light source is attached to the front side of the radiator. By adopting the scheme, the whole structure compactness is favorably improved, and the service life of the light source is prolonged.

Preferably, the method comprises the following steps: the light source is arranged on one side of the step part, the upper surface of the light source is flush with the upper surface of the radiator and is higher than the upper surface of the light guide sheet of the light source, and the bottom of the cover plate is step-shaped and is adapted to the height difference between the light guide sheet of the light source and the light source. By adopting the scheme, the light source and the light guide sheet of the light source can be simultaneously pressed by the cover plate, and the installation reliability is improved.

Preferably, the method comprises the following steps: and the cover plate, the radiator and the bottom plate are provided with screw holes which are arranged oppositely. By adopting the scheme, after the cover plate and the radiator are sequentially penetrated through the screw holes in the cover plate and the radiator, the cover plate and the radiator extend into the screw holes in the bottom plate, so that the cover plate and the radiator are quickly installed on the bottom plate, and the installation efficiency is improved.

Preferably, the method comprises the following steps: and a gap is reserved between the light source and the end face of the jig plate. By adopting the scheme, the heat conduction of the light source to the jig plate is reduced, and the interference of the temperature rise of the jig plate on the detection of the light guide plate is avoided.

Preferably, the method comprises the following steps: the light source is an LED line light source. The linear light source is matched with the light guide sheet, so that the uniformity of the light intensity of the emergent side of the light guide sheet of the light source is further improved, and the accuracy of the detection result is further improved.

Compared with the prior art, the beneficial effects of the utility model are that:

adopt the utility model provides a light guide plate outward appearance detection tool, integrated configuration satisfy the tool and remove detection and installation demand, and cooperation automation check out test set that can be better adopts unique light source position and light source leaded light piece structural design etc. simultaneously, improves detection efficiency and testing result reliability greatly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an exploded view of the present invention;

fig. 4 is a schematic view of the usage state of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

Referring to fig. 1 to 4, the light guide plate appearance inspection jig mainly includes a bottom plate 100 and a jig plate 200, the jig plate 200 is fixed to the bottom plate 100, wherein the bottom plate 100 is usually made of light metal, and plays a role of fixing or matching with a driving structure, and the jig plate 200 is made of teflon or is coated with teflon, or has a surface coating structure, and mainly plays a role of buffering, thereby preventing the light guide plate from being damaged due to direct contact with the hard bottom plate 100, and adopts a vacuum adsorption structure, and a vacuum adsorption connector 210 is disposed thereon, and adsorption holes are uniformly distributed on the upper surface, so as to mainly play a role of fixing the light guide plate, thereby improving the stability of the light guide plate during the movement of the jig, and preventing the light guide plate from being damaged.

The bottom plate 100 is provided with a light source 300, the external structure of the light source 300 is substantially a strip structure, which is located outside the rear end of the jig plate 200 and is parallel to the end of the jig plate 200, the emergent light of the light source 300 is parallel to the upper surface of the jig plate 200 and slightly higher than the upper surface of the jig plate 200, and the height difference is mainly determined by the thickness of the light guide plate to be inspected.

Specifically, as shown in the figure, the bottom plate 100 has two sinking platforms distributed along the length direction, which are a sinking platform a110 and a sinking platform B120, wherein the sinking platform B120 is slightly higher than the sinking platform a110, a step portion 130 is provided between the sinking platform a110 and the sinking platform B120, the jig plate 200 is fixedly disposed in the sinking platform a110, the upper surface of the jig plate 200 is higher than the upper surface of the step portion 130, the light source 300 is supported on the step portion 130 along the width direction of the bottom plate 100, the heat sink 600 is disposed in the sinking platform B120, and the front side of the heat sink 600 is tightly attached to the rear surface of the light source 300.

The upper surface of tool board 200 is equipped with light source leaded light piece 400 near the one end of light source 300, as shown in the figure, light source leaded light piece 400 is lamellar, its thickness with examine the light guide plate thickness of examining unanimous basically or slightly thicker than, lower than light source 300 upper surface simultaneously, the rear side of light source leaded light piece 400 is at least partly salient to the top of step portion 130, and hug closely with the light-emitting side of light source 300, ensure to have the heat dissipation gap between light source 300 and the tool board 200, avoid taking place heat-conduction, lead to the condition emergence of tool board 200 high temperature, rely on apron 500 to fix light source leaded light piece 400 at last.

The bottom of apron 500 is the step-like, the difference in height between the reason suits on the step height and light source leaded light piece 400 and the light source 300, the reason flushes with the upper surface of radiator 600 on the reason of light source 300 simultaneously, the rear side of apron 500 is located radiator 600 directly over, apron 500, radiator 600 and bottom plate 100 are gone up and are just having the screw to the setting, can be through the screw to apron 500, radiator 600 and bottom plate 100 fasten simultaneously, and step light source leaded light piece 400 and light source 300 through apron 500 compress tightly, be favorable to reducing the installation degree of difficulty, be convenient for the later stage to the maintenance or the change etc. of each part.

In this embodiment, the front edge of the cover plate 500 is flush with the light guide sheet 400 of the light source, so as to prevent light from being emitted from the upper portion and interfering with the detection, and the front side surface of the cover plate 500 is an inclined surface, and the upper end of the cover plate is inclined toward the rear, so as to mainly reduce the spatial interference in the height direction, thereby facilitating the placement or grasping of the light guide plate.

In order to further improve the uniformity of the intensity of the light emitted from the light guide sheet 400 and prevent the detection result from being affected by the light and dark alternation, the light source 300 is preferably a line light source composed of LEDs, which is beneficial to reducing the dark shadow area when the light source 300 emits.

Referring to fig. 1 to 4, light guide plate outward appearance detection tool that shows uses it in light guide plate outward appearance detecting element 700, as shown in the figure, detecting element includes platform 710, has lead screw module 720 on the platform 710, the utility model discloses a tool passes through bottom plate 100 and links to each other with the moving part among the lead screw module 720, can drive the tool through lead screw module 720 and be rectilinear movement, and the top of lead screw module 720 is equipped with CCD line scanning camera 740, and CCD line scanning camera 740 supports on platform 710 through grudging post 730.

The scan line of the CCD line scanning camera 740 is parallel to the width direction of the jig plate 200, and when the jig slides on the lead screw module 720, the upper surface thereof can pass through the scan line of the CCD line scanning camera 740, i.e., full-surface scanning is achieved.

During detection, the light guide plate 800 is grabbed by a gripper and placed on the jig plate 200, the dotting surface of the light guide plate 800 faces upwards, the rear end face of the light guide plate 800 is attached to the front side of the light source light guide sheet 400, the light guide plate is kept in a fixed posture by means of vacuum adsorption, the CCD line scanning camera 740 and the light source 300 are started, the jig is driven by the lead screw module 720 to move linearly, the CCD line scanning camera 740 scans the light guide plate 800 comprehensively, and finally the jig returns to the initial position under the driving of the lead screw module 720 to complete detection.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims

1. The utility model provides a light guide plate outward appearance detection tool which characterized in that: the jig comprises a bottom plate (100) and a jig plate (200) fixedly arranged on the bottom plate (100), wherein the jig plate (200) is constructed into a vacuum adsorption structure, the upper surface of the jig plate is provided with adsorption holes, and a light source (300) is arranged on the bottom plate (100);

the light source (300) is located at one end of the jig plate (200) and is parallel to the end of the jig plate (200), the emergent light of the light source (300) is parallel to the upper surface of the jig plate (200) and is higher than the upper surface of the jig plate (200), and the height of the emergent light exceeding the upper surface of the jig plate (200) is adapted to the thickness of the light guide plate to be detected.

2. The light guide plate appearance inspection jig according to claim 1, wherein: tool board (200) are close to the one end upper surface of light source (300) and have set firmly light source leaded light piece (400), light source leaded light piece (400) are lamellar, set up along the width direction of tool board (200), its thickness with examine the thickness of examining the light guide plate and suit, the laminating of light source (300) light-emitting side and the rear side of light source leaded light piece (400), light source leaded light piece (400) top is equipped with apron (500), apron (500) front side flushes with the front side of light source leaded light piece (400).

3. The light guide plate appearance inspection jig according to claim 2, wherein: have on bottom plate (100) along the heavy platform A (110) and heavy platform B (120) of its length direction distribution, wherein sink platform B (120) and be higher than sink platform A (110), sink and have step portion (130) between platform A (110) and heavy platform B (120), tool board (200) sets firmly in heavy platform A (110), is equipped with radiator (600) in heavy platform B (120), light source (300) are located between radiator (600) and light source leaded light piece (400), and light source (300) rear side and radiator (600) front side laminating.

4. The light guide plate appearance inspection jig according to claim 3, wherein: the light source (300) is arranged on one side of the step part (130), the upper surface of the light source (300) is flush with the upper surface of the radiator (600) and higher than the upper surface of the light source light guide sheet (400), and the bottom of the cover plate (500) is step-shaped and is adapted to the height difference between the light source light guide sheet (400) and the light source (300).

5. The light guide plate appearance inspection jig according to claim 3 or 4, characterized in that: the cover plate (500), the radiator (600) and the bottom plate (100) are provided with screw holes which are arranged oppositely.

6. The light guide plate appearance inspection jig according to any one of claims 1 to 4, characterized in that: a gap is reserved between the light source (300) and the end face of the jig plate (200).

7. The light guide plate appearance inspection jig according to any one of claims 2 to 4, wherein: the light source (300) is an LED line light source.