CN212808095U

CN212808095U - Cell-phone light guide plate outward appearance detection module

Info

Publication number: CN212808095U
Application number: CN202021989812.0U
Authority: CN
Inventors: 沈浩; 万英伟; 张东东; 尹建群; 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: 2021-03-26
Anticipated expiration: 2030-09-11

Abstract

The utility model discloses a cell-phone light guide plate outward appearance detection module, including examining test table and tool, and set up and be used for driving the tool to be horizontal linear motion's linear drive mechanism examining test table, the tool is including being used for accepting and waiting to examine the light guide plate, and make it keep the tool board of horizontal gesture, and be located the light source of this tool board one end, the emergent light of light source is parallel with the upper surface of tool board, and be higher than the upper surface of tool board, its difference in height suits with waiting to examine the light guide plate thickness, linear drive mechanism's top has the CCD linear array camera that the slope set up, its scanning line sets up with the removal route cross of tool, the stroke start and stop that the tool takes place to remove under the drive of linear drive mechanism is located the front and back both sides of. The appearance detection of the dotting surface of the light guide plate can be completed in a full-automatic operation mode, a unique jig structure is combined, the detection efficiency and the detection precision are greatly improved, the requirement of mass production is met, and meanwhile, the visual damage of personnel is reduced or avoided.

Description

Cell-phone light guide plate outward appearance detection module

Technical Field

The utility model relates to a cell-phone spare part detects technical field, concretely relates to cell-phone light guide plate outward appearance detection module.

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 performed at present by placing a light guide plate on a jig by a worker, shining light from different angles, identifying and detecting through naked eyes, easily causing visual damage to the worker after working for a long time, having high requirements on self skills and experience of the worker, causing relatively low detection efficiency, being difficult to ensure good detection quality and being incapable of meeting the requirements of mass production.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a cell-phone light guide plate outward appearance detection module to improve light guide plate outward appearance detection efficiency, satisfy mass production demand, improve simultaneously and detect the precision, alleviate personnel's visual damage etc..

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

the utility model provides a cell-phone light guide plate outward appearance detection module which the key lies in, includes:

a detection table;

the jig comprises a jig plate and a light source, wherein the jig plate is used for receiving the light guide plate to be detected and keeping the light guide plate to be detected in a horizontal posture, the light source is positioned at one end 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 difference of the light source is adaptive to the thickness of the light guide plate to be detected;

the linear driving mechanism is fixedly arranged on the detection table and used for driving the jig to do horizontal linear motion;

the CCD linear array camera is obliquely arranged above the linear driving mechanism, a scanning line of the CCD linear array camera intersects with the driving direction of the linear driving mechanism, and starting and stopping points of the moving stroke of the jig are respectively positioned at the front side and the rear side of the scanning line.

The technical scheme is adopted, the light guide plate is directly placed on the jig plate by the mechanical gripper during detection, after the light source is lightened, the linear driving mechanism drives the linear driving mechanism to move linearly so as to receive scanning detection of the CCD linear array camera, surface detection of the light guide plate can be completed, because the light source is incident from the end part of the light guide plate, a dark image area caused by scattering of the light source can be greatly reduced, so that the detection precision is improved, meanwhile, the automatic action mechanism is adopted to drive the light guide plate to receive scanning, the improvement of the detection efficiency is facilitated, the requirement of batch production is met, and visual damage to operators can be reduced.

Preferably, the method comprises the following steps: the CCD linear array camera is inclined downwards, and the included angle between the CCD linear array camera and the vertical direction is 0-60 degrees. By adopting the angle range, the scanning accuracy of the CCD linear array camera is favorably ensured, so that the detection result precision is improved.

Preferably, the method comprises the following steps: the CCD linear array camera is fixedly arranged on the vertical frame and is provided with a hand wheel angle adjusting structure. By adopting the scheme, the CCD linear array camera is convenient to mount quickly, the inclination angle of the CCD linear array camera can be adjusted as required, and the detection requirements of more light guide plate models are met.

In order to improve the moving stability of the jig and reduce vibration and the like, the linear driving mechanism is preferably a screw rod module mechanism or a linear motor.

Preferably, the method comprises the following steps: the jig plate dotting surface is of a vacuum adsorption structure, and a bottom plate dotting surface used for being connected with the linear driving mechanism dotting surface is fixedly arranged at the bottom of the jig plate dotting surface. By adopting the scheme, the abrasion of the jig to the light guide plate can be prevented or reduced, and the independent bottom plate is matched with the linear driving mechanism, so that the installation reliability, the motion stability and the like of the jig can be ensured.

Preferably, the method comprises the following steps: the utility model discloses a light source light guide plate, including tool board, light source light guide plate, cover plate, light source light guide plate, cover plate, light source light guide plate, light source light guide plate. Scheme more than adopting, send light through light source leaded light piece to the light source and carry out dodging, mainly play the effect of diverging the light source, 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 rear end of the base plate dotting surface is provided with a radiator dotting surface, the light source dotting surface is positioned between the radiator dotting surface and the light source light guide sheet dotting surface, and the cover plate dotting surface, the radiator dotting surface and the base plate dotting surface are provided with screw holes which are opposite to the screw holes. Scheme more than adopting is favorable to preventing that the light source temperature is too high, takes place heat-conduction with the tool board to exert an influence to the testing result, and can carry out quick fixed mounting to radiator, light source and light source leaded light piece through the apron, simplify overall structure, improve the installation effectiveness.

Preferably, the method comprises the following steps: the light source is an LED line light source. The point-line light source is matched with the light guide sheet of the light source, 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 a 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 cell-phone light guide plate outward appearance detection module adopts full automatization mode of operation to accomplish and to the appearance detection of dotting surface of light guide plate, combines unique tool structure, improves detection efficiency greatly and detects the precision, satisfies mass production demand, alleviates or avoids personnel's visual damage etc. simultaneously.

Drawings

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

FIG. 2 is a perspective view of the jig;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is an exploded view of the jig.

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 appearance inspection module for a light guide plate of a mobile phone mainly comprises an inspection table 100, a jig 300, a linear driving mechanism 200 for driving the jig 300 to make a linear motion, and a CCD line camera 400 disposed above the linear driving mechanism 200 in an inclined posture, wherein the jig 300 comprises a jig plate 310 for receiving the light guide plate to be inspected and capable of maintaining the light guide plate in a horizontal posture, and a light source 320 disposed at one end of the jig plate 310, in the present application, an emergent light of the light source 320 is parallel to and higher than an upper surface of the jig plate 310, a height difference between the emergent light and the upper surface of the jig plate 310 is adapted to a thickness of the light guide plate to be inspected, a scanning line of the CCD line camera 400 and a moving path of the jig 300 are disposed to intersect with each other, and a moving start point and a stop point of the jig 300 on the linear driving mechanism 200 are respectively, so as to ensure that the light guide plate can be scanned by the CCD line camera 400 over the entire surface when the jig 300 completes one stroke movement.

Its concrete structure is as shown in the figure, linear driving mechanism 200 sets up along the broad width direction of examining test table 100, in order to improve the mobility stability of tool 300, and be convenient for installation maintenance etc., the preferred lead screw module is as linear driving mechanism 200 in this embodiment, it is equipped with grudging post 410 to examine test table 100 last corresponding position, CCD linear array camera 400 then sets firmly on this grudging post 410 through hand wheel angle adjustment structure 410, its scanning head slope is down, through adjusting the hand wheel, can quick adjustment CCD linear array camera 400 inclination, in the concrete implementation process, CCD linear array camera 400 slope is down, and its and the contained angle of vertical direction (being perpendicular test table 100 surface direction) is within the 0 ~ 60 scope, in order to ensure to have optimal scanning precision.

The jig plate 310 may be a plate-shaped structure made of teflon, and is configured to be a vacuum adsorption structure, the upper surface of the jig plate has an adsorption hole, and the jig plate is configured with a vacuum adsorption connector 311, so as to greatly reduce the wear to the light guide plate and ensure the smooth surface, and the jig plate 310 may also be a coating or film structure on the upper surface of the bottom plate 330, and is also configured to be a vacuum adsorption structure.

The bottom of the jig plate 310 is fixedly provided with a bottom plate 330 for connecting with the linear driving mechanism 200, and the bottom plate 330 is usually made of a metal material.

As shown in the figure, the bottom plate 330 has two sinking platforms distributed along the length direction, which are a sinking platform a331 and a sinking platform B332, wherein the sinking platform B332 is slightly higher than the sinking platform a331, a protruding portion 333 is provided between the sinking platform a331 and the sinking platform B332, the jig plate 310 is fixedly disposed in the sinking platform a331, the upper surface of the jig plate 310 is higher than the upper surface of the protruding portion 333, the light source 320 is substantially in a strip structure and supported on the protruding portion 333 along the width direction of the bottom plate 330, a heat sink 360 is disposed in the sinking platform B332, and the front side of the heat sink 360 is tightly attached to the rear surface of the light source 320.

The upper surface of the jig plate 310 is provided with a light source light guide sheet 340 at one end close to the light source 320, as shown in the figure, the light source light guide sheet 340 is in a sheet shape, the thickness of the light source light guide sheet is basically consistent with or slightly thicker than that of the light guide sheet to be detected, meanwhile, the upper surface of the light source light guide sheet is lower than that of the light source 320, at least part of the rear side of the light source light guide sheet 340 protrudes to the upper part of the protruding part 333 and is tightly attached to the emergent side of the light source 320, a heat dissipation gap is ensured between the light source 320 and the jig plate 310, heat conduction is avoided, the condition that the temperature of the jig.

The bottom of apron 350 is the step form, the step height suits with the difference in height between the reason on light source leaded light piece 340 and the light source 320, the reason on light source 320 flushes with the upper surface of radiator 360 simultaneously, the rear side of apron 350 is located radiator 360 directly over, apron 350, radiator 360 and bottom plate 330 are gone up and are just having the screw to the setting, can be through the screw to apron 350, radiator 360 and bottom plate 330 fasten simultaneously, and step face light source leaded light piece 340 and light source 320 through apron 350 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 350 is flush with the light guide sheet 340 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 350 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 by a mechanical gripper.

In order to further improve the uniformity of the intensity of the light emitted from the light guide sheet 340 and prevent the detection result from being affected by the light and shade alternation, the light source 320 is preferably a line light source composed of LEDs, i.e. the intensity of the emitted light is increased and the dark area of the light source 320 is reduced.

Referring to the mobile phone light guide plate appearance detection module shown in fig. 1 to 4, during detection, the light guide plate 500 is grabbed by the hand and placed on the jig plate 310, the dotting surface of the light guide plate 400 faces upward, and the back end surface of the light guide plate 500 is ensured to be attached to the front side of the light source light guide sheet 340 through the hand parameter path setting, the light guide plate 500 is kept in a horizontal fixed posture by vacuum adsorption, then the CCD line scanning camera 400 and the light source 320 are started, the jig 300 is driven by the lead screw module to move linearly integrally, so that the CCD line scanning camera 400 scans the light guide plate 500 comprehensively, finally the jig 300 returns to an initial position under the driving of the lead screw module, the light guide plate 400 can be grabbed by the hand, the CCD line scanning camera 400 is connected with the background vision contrast processing equipment, whether the product quality reaches the standard can be quickly known through comparing.

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 cell-phone light guide plate outward appearance detection module which characterized in that includes:

an inspection table (100);

the jig (300) comprises a jig plate (310) used for receiving the light guide plate to be detected and keeping the light guide plate to be detected in a horizontal posture and a light source (320) positioned at one end of the jig plate (310), wherein emergent light rays of the light source (320) are parallel to the upper surface of the jig plate (310), are higher than the upper surface of the jig plate (310), and the height difference of the emergent light rays is adaptive to the thickness of the light guide plate to be detected;

the linear driving mechanism (200) is fixedly arranged on the detection table (100) and is used for driving the jig (300) to do horizontal linear motion;

the CCD linear array camera (400) is obliquely arranged above the linear driving mechanism (200), a scanning line of the CCD linear array camera is intersected with the driving direction of the linear driving mechanism (200), and starting and stopping points of the moving stroke of the jig (300) are respectively positioned at the front side and the rear side of the scanning line.

2. The appearance inspection module for a light guide plate of a mobile phone according to claim 1, wherein: the CCD linear array camera (400) is inclined downwards, and the included angle between the CCD linear array camera and the vertical direction is 0-60 degrees.

3. The appearance detection module for the light guide plate of the mobile phone according to claim 1 or 2, wherein: the CCD linear array camera is characterized in that a vertical frame (110) is arranged on the detection table (100), the CCD linear array camera (400) is fixedly arranged on the vertical frame (110), and a hand wheel angle adjusting structure (410) is configured.

4. The appearance inspection module for a light guide plate of a mobile phone according to claim 1, wherein: the linear driving mechanism (200) is a screw rod module mechanism or a linear motor.

5. The appearance inspection module for a light guide plate of a mobile phone according to claim 1, wherein: the jig plate (310) is of a vacuum adsorption structure, and the bottom of the jig plate is fixedly provided with a bottom plate (330) which is used for being connected with the linear driving mechanism (200).

6. The appearance inspection module for a light guide plate of a mobile phone according to claim 5, wherein: tool board (310) are close to the one end upper surface of light source (320) and have set firmly light source leaded light piece (340), light source leaded light piece (340) are slice, set up along the width direction of tool board (310), its thickness with examine the thickness of examining the light guide plate and suit, the laminating of the rear side of light source leaded light piece (340) is gone out to light source (320) light-emitting side, light source leaded light piece (340) top is equipped with apron (350), apron (350) front side flushes with the front side of light source leaded light piece (340).

7. The appearance inspection module for a light guide plate of a mobile phone according to claim 6, wherein: bottom plate (330) rear end is equipped with radiator (360), light source (320) are located between radiator (360) and light source leaded light piece (340), have on apron (350), radiator (360) and bottom plate (330) just to the screw that sets up.

8. The appearance detection module for the light guide plate of the mobile phone according to any one of claims 4 to 7, wherein: the light source (320) is an LED line light source.