CN210294730U - Device for detecting foreign matters among lines of liquid crystal display - Google Patents

Abstract

The utility model discloses a foreign matter detection device between liquid crystal display circuit, it includes drive assembly, the installation component, formation of image subassembly and light source subassembly, drive assembly is used for driving the installation component and carries out elevating movement, the installation component includes mounting panel and first mount pad, the mounting panel sets up on the drive assembly, first mount pad sets firmly on the mounting panel, the formation of image subassembly includes camera and camera lens, the camera is located on the first mount pad, the camera lens links to each other with the camera, the light source subassembly includes the light source cover, the bottom of camera lens is located to the light source cover, be equipped with the white light source that the multilayer is annular structure in the light source cover, white light source forms the annular side white light that shines the LCD screen. The utility model discloses white light source in the light source cover forms the annular side white light that shines the LCD screen, and annular side white light can satisfy the requirement of the exposure time that the camera is littleer to light source luminance, makes the image that the formation of image subassembly can more clearly gather the foreign matter between the circuit, and the foreign matter detects effectually to guarantee the production quality of LCD screen.

Description

Device for detecting foreign matters among lines of liquid crystal display

Technical Field

The utility model relates to a check out test set technical field, concretely relates to foreign matter detection device between liquid crystal display circuit.

Background

The liquid crystal screen has the advantages of small volume, low power consumption, low radiation and the like, and is widely applied to electronic equipment such as computers, mobile phones, liquid crystal televisions and the like. At present, the circuit defect of the liquid crystal screen is generally detected by using machine vision, the machine vision comprises an image acquisition unit and an image processing unit, the image acquisition unit acquires an image of the liquid crystal screen to be detected, then the image processing unit processes the image, and finally the defect condition of the circuit of the liquid crystal screen is obtained.

However, when the existing machine vision detects foreign matters on the lines of the liquid crystal display, most of the existing machine vision can only detect the foreign matters on the lines or among the lines, and most of the foreign matters among the lines cannot be detected, so that the production quality of the liquid crystal display is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above prior art's is not enough, provides a foreign matter detection device between liquid crystal display circuit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a foreign matter detection device between LCD screen circuit, includes drive assembly, installation component, formation of image subassembly and light source subassembly, drive assembly is used for driving installation component carries out elevating movement, installation component includes mounting panel and first mount pad, the mounting panel set up in on the drive assembly, first mount pad sets firmly on the mounting panel, the formation of image subassembly includes camera and camera lens, the camera is located on the first mount pad, the camera lens links to each other with the camera, the light source subassembly includes the light source cover, the light source cover is located the bottom of camera lens, be equipped with the white light source that the multilayer is annular structure in the light source cover, white light source forms the annular side white light that shines the LCD screen.

Preferably, the camera adopts a 400-ten thousand-area array black-and-white camera, the model number of the camera is aca2040-180km, the lens adopts a 4X fixed-magnification lens, and the model number of the lens is MML4-HR 65D.

Preferably, the camera adopts a 4K TDI line scan camera, the model of the camera is dalsa Piranha HS-80-04K40, and the lens adopts a 7X fixed-power lens, the model of the lens is VS-LTC7-50C 0-28.

Preferably, a point light source is arranged on the side edge of the lens, and a light path of the point light source and the lens form a coaxial light source.

Preferably, the light source cover is of a tower-shaped structure, and four layers of white light sources in an annular structure are sequentially arranged in the light source cover from top to bottom.

Preferably, the driving assembly comprises a second mounting seat, a driving motor, a screw rod and a sliding block, the driving motor is arranged at the top of the second mounting seat, the screw rod is rotatably arranged on the second mounting seat and connected with a crankshaft of the driving motor, and the sliding block is matched with the screw rod.

Preferably, the back of mounting panel has set firmly the connecting block, the connecting block is fixed mutually with the slider, the front side of second mount pad is equipped with the deflector, be equipped with the guide way on the connecting block, so that when the mounting panel goes up and down, the connecting block removes along the deflector.

After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:

the utility model discloses be equipped with the light source cover in the bottom of camera lens, be equipped with the white light source that the multilayer is the annular structure in the light source cover, white light source forms the annular side white light that shines the LCD screen, and annular side white light can satisfy the requirement of the exposure time that the camera is littleer to light source luminance, makes the foreign matter characteristic between the LCD screen circuit more outstanding, and the image of foreign matter between the circuit can be gathered more clearly to the formation of image subassembly, and the foreign matter detects effectually to guarantee the production quality of LCD screen.

Drawings

FIG. 1 is a schematic structural diagram according to a first embodiment;

FIG. 2 is a schematic structural diagram of a driving assembly;

FIG. 3 is a schematic structural diagram according to a second embodiment;

fig. 4 is a comparison diagram of the prior art and the utility model discloses detect foreign matter between circuit.

Description of reference numerals:

100. the driving assembly 110, the second mounting base 120, the driving motor 130, the screw rod 140, the sliding block 150 and the guide plate;

210. mounting plate, 211, connecting block, 212, guide groove, 220, first mounting seat;

310. camera, 320, lens, 330, point light source;

410. a light source cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.

Example one

Cooperation figure 1 and fig. 2 are shown, the utility model discloses a foreign matter detection device between liquid crystal display circuit, including drive assembly 100, installation component, formation of image subassembly and light source subassembly.

The driving assembly 100 is used for driving the mounting assembly to perform lifting movement, the driving assembly 100 includes a second mounting base 110, a driving motor 120, a screw 130 and a sliding block 140, the driving motor 120 is disposed at the top of the second mounting base 110, the screw 130 is rotatably disposed on the second mounting base 110 and connected with a crankshaft of the driving motor 120, and the sliding block 140 is matched with the screw 130.

The mounting assembly comprises a mounting plate 210 and a first mounting seat 220, the mounting plate 210 is arranged on the driving assembly 100, the first mounting seat 220 is fixedly arranged on the mounting plate 210, a connecting block 211 is fixedly arranged on the back of the mounting plate 210, the connecting block 211 is fixed with the sliding block 140, the guide plate 150 is arranged on the front side of the second mounting seat 110, and a guide groove 212 is formed in the connecting block 211, so that when the mounting plate 210 is lifted, the connecting block 211 moves along the guide plate 150.

The imaging assembly includes a camera 310 and a lens 320, the camera 310 is disposed on the first mounting seat, the lens 320 is connected to the camera 310, in this embodiment, the camera 310 employs a 400 ten thousand planar black and white camera, which is of aca2040-180km, and the lens 320 employs a 4X zoom lens, which is of MML4-HR 65D. The exposure time of the 400-kilo aca2040-180km area-array black-and-white camera is set to be 24us, the resolution of the MML4-HR65D lens is 1.375um/pixel, the FOV is 2.8mm by 2.8mm, and the detection speed is 60mm/s, so that the imaging assembly has the characteristics of high detection speed, high efficiency and the like.

The side of camera lens 320 is equipped with pointolite 330, and the light path of pointolite 330 forms coaxial light source with camera lens 320, and under the prerequisite that does not influence light source luminance effect, light source 330 can cooperate annular side white light to use together, and the image characteristic that makes the formation of image subassembly gather the foreign matter is more outstanding.

The light source assembly includes a light source cover 410, the light source cover 410 is disposed at the bottom of the lens 320, and a plurality of layers of white light sources in an annular structure are disposed in the light source cover 410, and the white light sources form an annular side white light for irradiating the liquid crystal screen. The light source cover 410 is a tower-shaped structure, and four layers of white light sources in an annular structure are sequentially arranged in the light source cover 410 from top to bottom. Because the exposure time of the area array black-and-white camera is only 24us, the requirement on the brightness of the light source is high, on the premise of not influencing the effect of side white light, four layers of annular side white light are sequentially arranged in the light source cover 410 from top to bottom, the requirement on the brightness of the light source can be ensured, the foreign matter characteristics among the lines of the liquid crystal screen are more prominent, the imaging assembly can more clearly acquire images of foreign matters among the lines, and the foreign matter detection effect is good.

Example two

As shown in fig. 2 and fig. 3, the present embodiment is different from the first embodiment in that:

the camera 310 adopts a 4KTDI line scan camera with model number of dalsa Piranha HS-80-04K40, and the lens 320 adopts a 7X fixed magnification lens with model number of VS-LTC7-50C 0-28. The 4K TDI line scanning black and white camera can increase the brightness of an image, the resolution of a VS-LTC7-50CO-28 lens is 1um/pixel, the width of a line scanning field is 4mm, the detection speed is 80mm/s, and compared with the imaging assembly in the first embodiment, the detection speed is higher, the efficiency is higher, and the detection effect is better.

TDI (time delayed and integration) CCD (time delayed integration CCD), wherein the TDI-CCD is based on multiple exposure of the same target, and the collection of light energy is greatly increased by a delay integration method. The signal with a certain signal-to-noise ratio can be output in a dark place, and the disadvantage that the signal-to-noise ratio is too low due to severe environmental conditions can be greatly improved.

The working principle of the TDI-CCD is different from that of the common linear array CCD, the line scanning speed and the movement speed of the target are required to be strictly synchronous, and otherwise, the image information of the target cannot be correctly extracted. When TDI-CCD is used to image a moving object, there are a number of advantages over other video scanning methods, including high sensitivity, large dynamic range, etc. It allows to increase the scanning speed when defining the light intensity, or to reduce the brightness of the illumination light source when scanning at a constant speed, reducing the power consumption and reducing the cost. In addition, the method has the outstanding advantage that image movement can be eliminated to a great extent when the push-broom mode is used for imaging.

Fig. 4 is the utility model discloses with the contrast picture of prior art detection circuit foreign matter within a definite time, can find out by the picture, the utility model discloses detection effect to circuit foreign matter within a definite time is better.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a foreign matter detection device between liquid crystal display circuit which characterized in that: including drive assembly, installation component, formation of image subassembly and light source subassembly, drive assembly is used for driving the installation component carries out elevating movement, the installation component includes mounting panel and first mount pad, the mounting panel set up in on the drive assembly, first mount pad sets firmly on the mounting panel, the formation of image subassembly includes camera and camera lens, the camera is located on the first mount pad, the camera lens links to each other with the camera, the light source subassembly includes the light source cover, the light source cover is located the bottom of camera lens, be equipped with the white light source that the multilayer is annular structure in the light source cover, white light source forms the annular side white light that shines the LCD screen.

2. The device for detecting the foreign matter between the lines of the liquid crystal display panel according to claim 1, wherein: the camera adopts a 400-ten thousand-area array black-and-white camera, the model is aca2040-180km, the lens adopts a 4X fixed-magnification lens, and the model is MML4-HR 65D.

3. The device for detecting the foreign matter between the lines of the liquid crystal display panel according to claim 1, wherein: the camera adopts a 4KTDI line scan camera, the model is dalsa Piranha HS-80-04K40, the lens adopts a 7X fixed-power lens, and the model is VS-LTC7-50C 0-28.

4. A device for detecting a foreign matter between lines of a liquid crystal panel according to claim 2 or 3, wherein: a point light source is arranged on the side edge of the lens, and a light path of the point light source and the lens form a coaxial light source.

5. The device for detecting the foreign matter between the lines of the liquid crystal display panel as claimed in claim 4, wherein: the light source cover is of a tower-shaped structure, and four layers of white light sources which are of annular structures are sequentially arranged in the light source cover from top to bottom.

6. The device for detecting the foreign matter between the lines of the liquid crystal display panel as claimed in claim 4, wherein: the driving assembly comprises a second mounting seat, a driving motor, a screw rod and a sliding block, the driving motor is arranged at the top of the second mounting seat, the screw rod is rotatably arranged on the second mounting seat and is connected with a crankshaft of the driving motor, and the sliding block is matched with the screw rod.

7. The device for detecting the foreign matter between the lines of the liquid crystal display panel according to claim 6, wherein: the back of mounting panel has set firmly the connecting block, the connecting block is fixed mutually with the slider, the front side of second mount pad is equipped with the deflector, be equipped with the guide way on the connecting block, so that when the mounting panel goes up and down, the connecting block removes along the deflector.

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