CN110296998A - A kind of defect detecting system and method for 3D panel - Google Patents
A kind of defect detecting system and method for 3D panel Download PDFInfo
- Publication number
- CN110296998A CN110296998A CN201910491094.XA CN201910491094A CN110296998A CN 110296998 A CN110296998 A CN 110296998A CN 201910491094 A CN201910491094 A CN 201910491094A CN 110296998 A CN110296998 A CN 110296998A
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- Prior art keywords
- panel
- curvature portion
- camera
- image
- plane mirror
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
Abstract
The invention belongs to the automation defect detecting technique fields of panel, disclose the defect detecting system and method for a kind of 3D panel, top of the image collector setting in the planar section of 3D panel, reflection unit is located at the side of the curvature portion of 3D panel, the light that the curvature portion of 3D panel issues is reflexed into image collecting device by reflection unit, the acquisition image of the acquisition image of the planar section of 3D panel, the curvature portion of 3D panel is obtained by image collecting device.The present invention solves the problems, such as that 2D display optical detective technology cannot be satisfied with 3D panel detection in the prior art, has and realizes low cost, detects efficient advantage.
Description
Technical field
The present invention relates to the automation defect detecting technique field of panel more particularly to a kind of defects detection systems of 3D panel
System and method.
Background technique
In consumption panel industry, a large amount of panel is flatness of the response at present.But as technology develops and individual disappears
Take the extension in market, the panel of 2D is no longer satisfied growing demand at present.As at present in wearable business and mobile phone
Market, 3D panel (such as curved surface mobile phone screen) occur more and more.The key property of 3D panel is that surface display area is no longer
One piece of plane, but different display areas have different height.One type 3D panel, is convex.This panel is existing
, also there is cambered surface pattern at 90 degree of right angles, such as curved surface mobile phone screen common in the market.
Since panel surface is the curved surface of convex, in the imaging process in Systems for optical inspection, imaging characteristic with
The surface imaging of 2D is inconsistent.Therefore, current 2D display optical detective technology cannot be satisfied with this 3D curved surface
Detection.
Summary of the invention
The embodiment of the present application solves 2D in the prior art by providing the defect detecting system and method for a kind of 3D panel
Display optical detective technology cannot be satisfied with the problem of 3D panel detection.
The embodiment of the present application provides a kind of defect detecting system of 3D panel, comprising: image collecting device, reflection unit；
Described image acquisition device is located at the top of the planar section of 3D panel, and the reflection unit is located at the song of 3D panel
The side of face part；
The reflection unit is used to the light that the curvature portion of the 3D panel issues reflexing to described image acquisition device；
Described image acquisition device is used to obtain the curvature portion of the acquisition image of the planar section of the 3D panel, the 3D panel
Acquire image.
Preferably, described image acquisition device includes camera, the camera lens for being set to described camera one end.
Preferably, the reflection unit is plane mirror.
Preferably, the reflection unit includes the first plane mirror, second plane mirror；First plane reflection
Mirror is set to the first side of the curvature portion of the 3D panel, and the second plane mirror is set to the curved face part of the 3D panel
The second side divided.
Preferably, the angle between first plane mirror and horizontal plane is 45 °, the second plane mirror with
Angle between horizontal plane is 135 °.
Using above system, the embodiment of the present application also provides a kind of defect inspection method of 3D panel, comprising the following steps:
3D panel to be detected is placed in station to be detected by step 1, and the top of the planar section of 3D panel is equipped with image
The side of acquisition device, the curvature portion of 3D panel is equipped with reflection unit；
The light that the curvature portion of 3D panel issues is reflexed to described image acquisition dress by the reflection unit by step 2
It sets；
Step 3, the curved surface for acquiring image, 3D panel that the planar section of 3D panel is obtained by described image acquisition device
Partial acquisition image；
Step 4, according to the acquisition image of the planar section of the 3D panel, the acquisition figure of the curvature portion of the 3D panel
As being detected to the defect of 3D panel.
Preferably, described image acquisition device includes camera, the camera lens for being set to described camera one end；The reflection unit
Including the first plane mirror, second plane mirror；First plane mirror is set to the curvature portion of the 3D panel
First side, the second plane mirror be set to the 3D panel curvature portion second side.
Preferably, the operating distance WD=f (1+L1/L2) of the camera；Wherein, f is the focal length of the camera lens, and L1 is institute
The length of 3D panel is stated, L2 is the chip length of the camera.
Preferably, the camera has automatic focusing function, and the focusing mode of the camera is the focusing of camera lens integral elevating
Or camera adjusting focusing.
Preferably, if the precision of defects detection is higher than default precision, described image acquisition device is using secondary focusing
Mode carries out Image Acquisition, acquires the image of the planar section of the 3D panel for the first time, acquires the 3D panel for the second time
The image of curvature portion.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
In the embodiment of the present application, based on the reflective mechanism of reflection unit, the side surface of 3D panel/curved surface area is issued
Light be reflected towards, so as to enter image collecting device, detected by image collecting device.I.e. the present invention will by reflection unit
The surface characteristic of the curvature portion of 3D panel reflexes to image collecting device present position upwards.So that image collecting device is not
In the case where shift position, the surface area (i.e. planar section) of 3D panel can either be taken, the face 3D can be also taken
Side surface/curved surface area (i.e. curvature portion) of plate.The present invention, which has, realizes low cost, detects efficient advantage.
Detailed description of the invention
It, below will be to needed in embodiment description in order to illustrate more clearly of the technical solution in the present embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of Curved screen detection scheme in the prior art；
Fig. 2 is a kind of schematic illustration of the defect inspection method of 3D panel provided in an embodiment of the present invention.
Wherein, 1-3D panel, 2- image collecting device, 3- reflection unit；
The curvature portion of the planar section of 11-3D panel, 12-3D panel.
Specific embodiment
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
As shown in Figure 1, the prior art uses list only to face camera (i.e. image collecting device 2 detection of 3D panel 1
Positioned at the top of 3D panel 1) shooting mode, can lead to the problem of it is following two aspect:
(1) depth of field is insufficient.Due to 3D panel curvature portion 12 relative to 3D panel planar section 11 not in same water
In plane, optical system imaging can only focus to a fixed pan, and for there is the object of difference in height, it cannot focus simultaneously not
Level position, this point are also referred to as the depth of field limitation of optical imagery.The prior art is not able to satisfy curved sides face region
Imaging.
(2) 3D panel 1 biggish for curvature, due to the factor at visual angle, image collecting device 2 (such as face camera
Camera lens) region of the curvature portion 12 of 3D panel on the lower, the tangent line (portion of light a) below as shown in Figure 1 can not be taken
Point.Therefore, the prior art can not the curvature portion 12 to 3D panel completely detected.
In view of the above-mentioned problems, a kind of defect detecting system of 3D panel is present embodiments provided, referring to Fig. 1, Fig. 2, comprising:
Image collecting device 2, reflection unit 3.
Wherein, described image acquisition device 2 is located at the top of the planar section 11 of 3D panel, and the reflection unit 3 is located at
The side of the curvature portion 12 of 3D panel.
The reflection unit 3 is used to reflex to the light that the curvature portion 12 of the 3D panel issues described image acquisition dress
Set 2；Described image acquisition device 2 is used to obtain the song of the acquisition image of the planar section 11 of the 3D panel, the 3D panel
The acquisition image of face part 12.
Referring to Fig. 2, light that the planar section 11 of the 3D panel issues (light b) is transferred to described image acquisition device 2,
(light c) (becomes light d) and reflexes to institute the light that the curvature portion 12 of the 3D panel issues after passing through the reflection unit 3
State image collecting device 2.
Specifically, described image acquisition device 2 includes camera, the camera lens for being set to described camera one end.The reflection dress
3 are set as plane mirror.
The reflection unit 3 includes the first plane mirror, second plane mirror；First plane mirror is set to
The first side of the curvature portion 12 of the 3D panel, the second plane mirror are set to the curvature portion 12 of the 3D panel
Second side.That is the left and right sides that two plane mirrors are respectively arranged on the 3D panel 1.
It is preferred that situation, the angle between first plane mirror and horizontal plane is 45 °, second plane reflection
Angle between mirror and horizontal plane is 135 °.
Using above system, the embodiment of the present application also provides a kind of defect inspection method of 3D panel, referring to Fig. 1, Fig. 2,
The following steps are included:
3D panel 1 to be detected is placed in station to be detected by step 1, and the top of the planar section 11 of 3D panel is equipped with
The side of image collecting device 2, the curvature portion 12 of 3D panel is equipped with reflection unit 3；
The light that the curvature portion 12 of 3D panel issues is reflexed to described image acquisition by the reflection unit 3 by step 2
Device 2；
Step 3, acquisition image, the 3D panel that the planar section 11 of 3D panel is obtained by described image acquisition device 2
The acquisition image of curvature portion 12；
Step 4 is adopted according to the acquisition image of the planar section 11 of the 3D panel, the curvature portion 12 of the 3D panel
Collection image detects the defect of 3D panel 1.
Specifically, described image acquisition device 2 includes camera, the camera lens for being set to described camera one end；The reflection dress
Setting 3 includes the first plane mirror, second plane mirror；First plane mirror is set to the curved face part of the 3D panel
Divide 12 first side, the second plane mirror is set to the second side of the curvature portion 12 of the 3D panel.
The operating procedure detected using the defect inspection method of 3D panel provided by the invention is as follows:
(1) operating distance of camera is determined.
The operating distance WD=f (1+L1/L2) of camera.Wherein, f is the focal length of selected camera lens, and L1 is the length of 3D panel
(width) (L1 is the size of 3D panel entirety, the arc length of length and curvature portion including planar section), L2 is the length of camera chip
It spends (width).Actual operating distance can be adjusted on this basis, to guarantee that camera can shoot whole visual field.
(2) reflection unit is set up respectively in the two sides of the curvature portion of 3D panel.
Reflection unit includes the first plane mirror, second plane mirror；First plane mirror is set to 3D panel
The first side of curvature portion, second plane mirror are set to the second side of the curvature portion of 3D panel.I.e. two planes are anti-
Penetrate the left and right sides that mirror is respectively arranged on 3D panel.
It is preferred that situation, the angle between the first plane mirror and horizontal plane is 45 °, second plane mirror and horizontal
Angle between face is 135 °.
The distance D1 on reflecting mirror distance 3D panel bottom edge according to reflected light can be reflected into above (i.e. curvature portion issue
Can light emit upwards after reflection) it is adjusted for standard.
(3) camera can increase automatic focusing function as needed.
Two kinds of focusing modes can be used in camera, and one is the focusing of camera lens integral elevating.Secondly utilizing camera adjusting pair
It is burnt.
(4) 3D panel picture is shot.
According to actual detection accuracy, if detection accuracy is low, secondary focusing is not needed.If detection accuracy is high, need
Secondary focusing shooting.Shooting upper surface (i.e. plane domain) for the first time, second of shooting side.In concrete application, according to curved surface
Different-shape come select focusing number.
In the case where detection accuracy height, the depth of field existing in the prior art can solve by secondary focusing shooting and ask
Topic.
For example, the depth of field as the precision of image detection is tolerated only has 2mm, then the curvature portion of 3D panel is within 2mm
Part detected enough with facing camera, the curvature portion of 3D panel needs side rearview mirror to reflect in 2mm above section.In addition,
The reflecting mirror of side setting increases the length of optical path, if this length in field depth, do not need yet it is secondary right
It is burnt.
To sum up, the defect detecting system and method for a kind of 3D panel proposed by the present invention, by reflection unit by 3D panel
The light of curvature portion reflect upwards, can be used an image collecting device shooting 3D panel upper surface characteristic and non-upper table
Face characteristic.
The defect detecting system and method for a kind of 3D panel provided in an embodiment of the present invention include at least following technical effect:
(1) testing agency is simple, and the song of 3D panel can be completed in an image collecting device (such as camera of single-view)
The defects detection of face part and planar section.
(2) hardware cost is low, shoots the curvature portion and planar section of 3D panel simultaneously by an image collecting device,
Required detection picture number is few, is conducive to computer disposal.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of defect detecting system of 3D panel characterized by comprising image collecting device, reflection unit；
Described image acquisition device is located at the top of the planar section of 3D panel, and the reflection unit is located at the curved face part of 3D panel
The side divided；
The reflection unit is used to the light that the curvature portion of the 3D panel issues reflexing to described image acquisition device；It is described
The acquisition of the acquisition image, the curvature portion of the 3D panel of planar section of the image collecting device for obtaining the 3D panel
Image.
2. the defect detecting system of 3D panel according to claim 1, which is characterized in that described image acquisition device includes
Camera, the camera lens for being set to described camera one end.
3. the defect detecting system of 3D panel according to claim 1, which is characterized in that the reflection unit is that plane is anti-
Penetrate mirror.
4. the defect detecting system of 3D panel according to claim 3, which is characterized in that the reflection unit includes first
Plane mirror, second plane mirror；First plane mirror is set to the first side of the curvature portion of the 3D panel
Face, the second plane mirror are set to the second side of the curvature portion of the 3D panel.
5. the defect detecting system of 3D panel according to claim 4, which is characterized in that first plane mirror with
Angle between horizontal plane is 45 °, and the angle between the second plane mirror and horizontal plane is 135 °.
6. a kind of defect inspection method of 3D panel, which comprises the following steps:
3D panel to be detected is placed in station to be detected by step 1, and the top of the planar section of 3D panel is equipped with Image Acquisition
The side of device, the curvature portion of 3D panel is equipped with reflection unit；
The light that the curvature portion of 3D panel issues is reflexed to described image acquisition device by the reflection unit by step 2；
Step 3, the curvature portion for acquiring image, 3D panel that the planar section of 3D panel is obtained by described image acquisition device
Acquisition image；
Step 4, according to the acquisition image of the planar section of the 3D panel, the acquisition image pair of the curvature portion of the 3D panel
The defect of 3D panel is detected.
7. the defect inspection method of 3D panel according to claim 6, which is characterized in that described image acquisition device includes
Camera, the camera lens for being set to described camera one end；The reflection unit includes the first plane mirror, second plane mirror；
First plane mirror is set to the first side of the curvature portion of the 3D panel, and the second plane mirror is set to institute
State the second side of the curvature portion of 3D panel.
8. the defect inspection method of 3D panel according to claim 7, which is characterized in that the operating distance WD of the camera
=f (1+L1/L2)；Wherein, f is the focal length of the camera lens, and L1 is the length of the 3D panel, and L2 is that the chip of the camera is long
Degree.
9. the defect inspection method of 3D panel according to claim 7, which is characterized in that the camera has auto-focusing
Function, the focusing mode of the camera are that camera lens integral elevating is focused or camera adjusting is focused.
10. the defect inspection method of 3D panel according to claim 6, which is characterized in that if the precision of defects detection is high
In default precision, then described image acquisition device carries out Image Acquisition by the way of secondary focusing, acquires the 3D for the first time
The image of the planar section of panel acquires the image of the curvature portion of the 3D panel for the second time.
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| CN201910491094.XA CN110296998A (en) | 2019-06-06 | 2019-06-06 | A kind of defect detecting system and method for 3D panel |
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| CN201910491094.XA CN110296998A (en) | 2019-06-06 | 2019-06-06 | A kind of defect detecting system and method for 3D panel |
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Cited By (7)
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| CN110855898A (en) * | 2020-01-14 | 2020-02-28 | 武汉精立电子技术有限公司 | Checkerboard graph for curved screen test, image acquisition method and device |
| CN111025701A (en) * | 2019-12-30 | 2020-04-17 | 凌云光技术集团有限责任公司 | Curved surface liquid crystal screen detection method |
| CN111060196A (en) * | 2020-01-03 | 2020-04-24 | 武汉天马微电子有限公司 | Brightness obtaining equipment and method for display screen |
| CN111369898A (en) * | 2020-04-23 | 2020-07-03 | 云谷（固安）科技有限公司 | Compensating device of display panel and display panel |
| CN111508400A (en) * | 2020-06-04 | 2020-08-07 | 霸州市云谷电子科技有限公司 | Display screen image acquisition device and display screen detection equipment |
| CN111650201A (en) * | 2020-07-15 | 2020-09-11 | Oppo（重庆）智能科技有限公司 | Detection device and detection method |
| CN112924456A (en) * | 2019-12-06 | 2021-06-08 | 合肥欣奕华智能机器有限公司 | Curved screen detection device and detection method thereof |
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Application publication date: 20191001 |