CN207096624U - A kind of backlight tool for display screen detection - Google Patents
A kind of backlight tool for display screen detection Download PDFInfo
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- CN207096624U CN207096624U CN201721047793.8U CN201721047793U CN207096624U CN 207096624 U CN207096624 U CN 207096624U CN 201721047793 U CN201721047793 U CN 201721047793U CN 207096624 U CN207096624 U CN 207096624U
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- display screen
- top plate
- lower plywood
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- sealing ring
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Abstract
The application provides a kind of backlight tool for display screen detection, including underframe (1), transparent lower plywood (2), sealing ring (3) and transparent top plate (4)；Underframe is embedded with lower plywood；The upper surface of lower plywood is provided with annular groove (21), and marks off closed area by annular groove, and first through hole (22) is provided with closed area, and first through hole connects the upper and lower surface of lower plywood；Sealing ring is installed in annular groove, and the thickness of sealing ring is more than the depth of annular groove；Top plate is covered on sealing ring, and is collectively forming cavity with lower plywood and sealing ring；The second through hole (41) of the upper and lower surface of at least one connection top plate is opened up on top plate.Backlight tool in above-mentioned technical proposal can adsorb fixed display screen, suitable for various sizes of display screen, and have good light transmittance, make the light of transmission have preferable uniformity.
Description
Technical field
It the utility model is related to the detection auxiliary equipment field of display screen, and in particular to a kind of back of the body for display screen detection
Light tool.
Background technology
During the production and assembly of display screen (mobile phone, vehicle-mounted, notebook, video screen etc.), after each process terminates
It is both needed to detection display screen and whether there is defect, subsequent processing could be flowed into by detecting qualified display screen.Detecting some display screens
During defect, for example, detection display screen liquid crystal leakage, or detection glass cover-plate ink area fall paint, scratch, chipping the defects of when, need
Light of being eager to excel passes through display screen from the back side, recycles detection device, such as automatic optics inspection (English：Automatic Optic
Inspection, abbreviation：AOI) equipment, optical imagery is carried out to display screen, so as to complete defects detection.
Tool is as the position for assisting control targe thing and/or a kind of aid of action.Display screen production field
It is interior, a kind of tool for being commonly used in backlight detection, it is that part is cut off on impermeable isotropic disk, forms the breach of printing opacity.Breach
It is identical to be dimensioned slightly smaller than the size of display screen, scope rack is located on breach, so as to by breach by backlight illumination to show
Shield the back side.This tool is according to each differently sized display screen and the specific tool that is fabricated separately, can not be applied to not
With the display screen of size；Meanwhile in order to hold display screen, when scope rack is located on breach, edge portion area is always and not
Subregion on transparent panel outside breach has overlapping, causes the display screen of this overlapping region can not carry out backlight detection.
Another kind is commonly used in the tool of backlight detection, including transparent panel and the block for being arranged on transparent panel periphery.Make
Used time, display screen is placed on transparent panel, four sides of display screen are limited with block, so as to which display screen is limited on transparent panel.
Tool moves, and driving display screen moves to test position, and backlight irradiates below transparent panel, makes light source by transparent panel, then
From the back side defect is detected through display screen.In order to facilitate taking for display screen, needed between the block and display screen of this tool
Certain gap is left, with display screen the interference such as friction occurs for block when avoiding taking display screen.When display screen needs in detection
When being switched to different stations, display screen switches over tool movement, due to gap between block and display screen be present,
The relative displacement of small range can still occur on tool for display screen, be unfavorable for the defects of follow-up and detect.
Therefore, the existing backlight tool for display screen detection, can not be applied to various sizes of display screen, and controlling
With tool relative displacement can occur for display screen when tool is mobile, and this is those skilled in the art's urgent problem to be solved.
Utility model content
The application provides a kind of backlight tool for display screen detection, can not be applied to difference to solve existing tool
The display screen of size, and the problem of relative displacement can occur between display screen and tool when tool moves.
Specifically, the application provide it is a kind of for display screen detection backlight tool, including underframe, transparent lower plywood,
Sealing ring and transparent top plate；The underframe is embedded with the lower plywood；The upper surface of the lower plywood is provided with annular groove,
And closed area is marked off by the annular groove, first through hole is provided with the closed area, the first through hole connects
Lead to the upper and lower surface of the lower plywood；The sealing ring is installed in the annular groove, the thickness of the sealing ring
More than the depth of the annular groove；The top plate is covered on the sealing ring, and with the lower plywood and described close
Seal is collectively forming cavity；The second of the upper and lower surface of at least one connection top plate is opened up on the top plate
Through hole.
Alternatively, the axis of second through hole is perpendicular to the surface of the top plate.
Alternatively, backlight tool also includes the lid frame on the top plate, and the internal diameter of the lid frame is less than on described
The external diameter of laminate, the external diameter of lid frame are more than the external diameter of the top plate and the external diameter of the lower plywood, and the lid frame passes through fastening
Part and the underframe are affixed, and by the top plate stationary gland on the sealing ring.
Alternatively, the top plate is quartz glass plate.
Alternatively, the lower plywood is poly (methyl methacrylate) plate.
Alternatively, vacuum tube joint is additionally provided with below the lower plywood, described vacuum tube joint one end is logical with described first
Hole connects.
Alternatively, it is additionally provided with light source component below the lower plywood.
In backlight tool in the application, transparent lower plywood, sealing ring and transparent top plate three are collectively forming one
Individual cavity, opens up first through hole on lower plywood, and for being connected with the vacuum equipment of outside, it is logical that second is opened up on top plate
Hole so that the upper and lower surface connection of top plate.When in use, outside vacuum equipment pumping so that produced in cavity
Negative pressure.The opening position for the second through hole display screen being placed on top plate, to block the second through hole, now, two above and below display screen
There is pressure difference in face so that display screen is fixed on top plate under atmospheric pressure.Such backlight tool is for examining
During the defects of surveying display screen, even if backlight tool carries display screen and moved together, with backlight tool phase will not also occur for display screen
To displacement, there is excellent absorption fixation, so as to for it is follow-up the defects of detect provide guarantee condition.Also, due to not
Limit the position of display screen using block, the backlight tool in the application goes for the display screen of sizes.
In addition, the backlight tool of the application has good light transmittance, the display screen back side is irradiated to by backlight tool
Light has preferable uniformity, backlight tool surface abrasion resistance, is easily worked production.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the Standard schematic diagram of the one of embodiment for the backlight tool that the application is used for display screen detection.
The local A for the backlight tool for being used for display screen detection that Fig. 2 is Fig. 1 enlarged drawing.
The local B for the backlight tool for being used for display screen detection that Fig. 3 is Fig. 1 enlarged drawing.
Description of reference numerals：Underframe 1；Intrusion slot 11；Lower plywood 2；Annular groove 21；First through hole 22；Vacuum tube joint
23；Second fastening through-hole 24；Sealing ring 3；Top plate 4；Second through hole 41；The axis 411 of second through hole；Lid frame 5；First fastening
Through hole 51；Light source component 6.
Embodiment
Embodiments herein is elaborated below.In the description of the present application, it is to be understood that term
The orientation or position relationship of the instruction such as " on ", " under ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, are only
Described for the ease of simplifying, rather than the device or element of instruction or hint meaning there must be specific orientation, with specific
Azimuth configuration and operation, therefore it is not intended that limitation to the application.
Term " first ", " second " be only used for describe purpose, and it is not intended that instruction or imply relative importance or
The implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be expressed or imply
Ground includes one or more this feature.In the description of the present application, " multiple " are meant that two or more, unless
It is another to have clearly specific limit.
Fig. 1 and Fig. 2 are refer to, in a specific embodiment, there is provided a kind of backlight tool for display screen detection, bag
Include underframe 1, transparent lower plywood 2, sealing ring 3 and transparent top plate 4；Underframe 1 is embedded with lower plywood 2；The upper table of lower plywood 2
Face is provided with annular groove 21, and marks off closed area by annular groove 21, and first through hole 22 is provided with closed area, the
One through hole 22 connects the upper and lower surface of lower plywood 2；Sealing ring 3 is installed in annular groove 21, and the thickness of sealing ring 3 is big
In the depth of annular groove 21；Top plate 4 is covered on sealing ring 3, and is collectively forming cavity with lower plywood 2 and sealing ring 3；On
The second through hole 41 of the upper and lower surface of at least one connection top plate 4 is opened up on laminate 4.
In backlight tool in the present embodiment, transparent lower plywood 2, sealing ring 3 and the transparent common shape of the three of top plate 4
Into a cavity, first through hole 22 is opened up on lower plywood 2, for being connected with the vacuum equipment of outside, is opened up on top plate 4
Second through hole 41 so that the upper and lower surface connection of top plate 4.When in use, outside vacuum equipment pumping so that empty
Intracavitary produces negative pressure.The opening position for the second through hole 41 that display screen is lain on top plate 4, to block the second through hole 41, this
When, there is pressure difference in display screen upper and lower surface so that display screen is fixed on top plate 4 under atmospheric pressure.It is such
When backlight tool is for detecting display screen the defects of, even if backlight tool carries display screen and moved together, display screen and backlight
Also relative displacement will not occur between tool, so as to for it is follow-up the defects of detect and provide good guaranteed conditions, also, due to
Block is not used to limit the position of display screen, the backlight tool in the present embodiment, goes for the display screens of sizes.
The shape of underframe 1 in above-described embodiment, can be rectangle, circle, ellipse or non-regular shape etc., and the application is real
Example is applied not limit this.For example, underframe can be connected the underframe for forming rectangle two-by-two by four side walls；Further for example, underframe can
To form circular or ellipse underframe by the first connection of a curved wall.Fig. 2 is refer to, in the side wall upper part of underframe 1
Side can open up step-like intrusion slot 11, for lower plywood 2 to be embedded into underframe 1, now, step-like intrusion slot 11
Shape and the lateral edges shape adaptation of lower plywood 2.
Transparent top plate 4, transparent lower plywood 2 can be made up of transparent material in above-described embodiment, such as transparent
Top plate can use glass, transparent lower plywood 2 can use transparent polymer material.
Annular groove 21 in above-described embodiment on lower plywood 2, lower plywood 2 two pieces of regions are marked off into, one piece is ring
Closed area within connected in star 21, another piece is region beyond annular groove 21.The size of closed area is more than display screen
Size, so as to which annular groove 21 and sealing ring 3 produce unnecessary block all without to backlight.Opened up in closed area
First through hole 22, be preferably opened in the position close to annular groove 21, the vacuum tube joint 23 for avoiding connecting below is to the back of the body
Light source produces unnecessary block.
Sealing ring 3 can use flexible material, such as rubber etc. in above-described embodiment.The thickness of sealing ring 3 is big
In the depth of annular groove 21, avoid the lower surface of top plate 4 and the upper surface of lower plywood 2, so as to ensure sealing ring 3,
Top plate 4 and lower plywood 2 can collectively form cavity.The thickness of this cavity is typically small, and the thickness equal to sealing ring 3 subtracts
The depth of annular groove 21, then subtract the deformation quantity that the in the vertical direction of sealing ring 3 is compressed.The thickness of cavity is too big, can make
It is excessive, it is necessary to which longer time can be only achieved suitable vacuum to obtain cavity volume；The thickness of cavity is too small, then in actual production
In requirement to top plate 4 and the flatness of lower plywood 2 it is excessively harsh, and also improve top plate 4, sealing ring 3 and under
The assembly difficulty of laminate 2.
Be provided with the second through hole 41 on top plate 4 in above-described embodiment, the shape of the second through hole 41 can be it is cylindric,
Can be cuboid, triangular prism or cylindroid etc., the embodiment of the present application is not limited this.Second through hole 41 can be arranged on
The centre position of laminate 4, other positions on top plate 4 can also be arranged on, the area that need to be only drawn a circle to approve after sealing ring installs
Within domain, and can adsorb fixed display screen makes it not move.Second through hole 41 can only set one, can also set
Put multiple；When setting multiple, the Rankine-Hugoniot relations between multiple second through holes 41 can be array or irregular
Arrangement, the embodiment of the present application are not limited this.Usually, when display screen is placed on top plate 4, it is desirable to which covering is all
The second through hole 41, in order to avoid the second through hole 41 being not covered with connects with atmospheric pressure so that the pressure difference of display screen both sides occurs
Change, weakens expected absorption fixed effect, but this can depend on size or the position placed of display screen of display screen, with the
Simultaneously positive connection is not present in the set-up mode of the position of two through hole 41.
Optionally, the axis 411 of the second through hole 41 is exactly perpendicular to the surface of top plate 4, the now depth of the second through hole 41
The thickness of top plate 4.
In backlight tool in use, the lower section of lower plywood 2 is provided with light source component 6, backlight caused by light source component 6 passes through transparent
Lower plywood 2 and top plate 4, then the back side illuminaton display screen from display screen, so as to provide backlight for display screen defects detection
Source.Processing forms the second through hole 41 on top plate 4, the finished surface relative transparent material formed due to the through hole of common processing
Expect more coarse for original surface, when light is by these finished surfaces, luminous intensity has loss unavoidably, and has an effect on
To the light exposure pathways of backlight, and then the light transmittance of whole backlight tool is influenceed, also influence the light by backlight tool
Uniformity.
In the application optional embodiment, the axis 411 of the second through hole 41 is perpendicular to the surface of top plate 4, with being irradiated to
The radiation direction at the display screen back side is consistent, so that projection of the machined surface of the second through hole 41 on optical path direction on top plate 4
Area is minimum, and then reduces the influence of path that the second through hole 41 irradiates to light and luminous intensity, improves whole backlight tool
Light transmittance, lifting are irradiated to the uniformity of the light at the display screen back side.In addition, the second through hole 41 is perpendicular to the surface of top plate 4
Also allow for the processing of top plate 4.
Optionally, top plate 4 can use glass, such as soda-lime glass, quartz glass, and glass has preferable optics special
Property is firm and be unlikely to deform.Preferably, top plate 4 is quartz glass plate, and quartz glass plate is silica one-component
Special industrial glass, as the top plate 4 in the backlight tool in the embodiment of the present application so that what is frequently contacted with display screen controls
It is not easy to wear to have top plate 4, is unlikely to deform, while only needs to process the second through hole 41 on quartz glass plate, it is not necessary to carries out other
Processing, also reduces the difficulty of processing to quartz glass plate.
Optionally, lower plywood 2 uses transparent polymer material, such as polymethyl methacrylate (PMMA, also known as organic glass
Glass), polystyrene (PS), makrolon (PC) etc..Preferably, lower plywood 2 is poly (methyl methacrylate) plate, and poly (methyl methacrylate) plate has excellent
Different light transmission and processing characteristics, due to needing to open up annular groove 21 and first through hole 22 on the lower plywood 2 of backlight tool,
Also need to open up the second fastening through-hole 24 when necessary, processing is more, and difficulty of processing can be reduced using poly (methyl methacrylate) plate, drops
Low production cost.
By selecting quartz glass plate as top plate 4, it is lower plywood 2 to select poly (methyl methacrylate) plate, with backlight tool
Structure is combined, and both ensure that backlight tool has preferably absorption fixation, good light transmittance and uniformity, has been caused again
Backlight tool can be wear-resistant, increases the service life, and also reduces the difficulty of processing and production cost of backlight tool on the whole.
Fig. 1 is refer to, in another embodiment, is previously described for the backlight tool of display screen detection, in addition to be located at
Lid frame 5 on top plate 4, the internal diameter of lid frame 5 are less than the external diameter of top plate 4, the external diameter of lid frame 5 be more than top plate 4 external diameter and
The external diameter of lower plywood 2, lid frame 5 is affixed by fastener (not shown) and underframe 1, and by the stationary gland of top plate 4 in close
In seal 3.The first fastening through-hole 51 can be opened up at the close outer rim of lid frame 5, so as to which fastener passes through the first fastening through-hole 51
Lid frame and underframe 1 is affixed, a downward power is provided for top plate 4, makes the top plate 4 under lid frame 5 by stationary gland close
In seal 3, the sealing effectiveness between lift-off seal circle 3 and top plate 4, lower plywood 2, it is ensured that cavity is formed between three.In addition,
When top plate 4 is using quartz glass plate, is fixed by lid frame 5, avoid and multi-processing was carried out to quartz glass plate, can dropped
The low difficulty of processing to quartz glass plate.In addition, lower plywood 2 can also be beforehand through fastener (not shown) and underframe 1
It is affixed, when lower plywood 2 is using poly (methyl methacrylate) plate, directly can be fastened in the position processing second of the close outer rim of lower plywood 2
Through hole 24.Except lid frame 5, top plate 4 and lower plywood 2 can also be by common clamping device fixed settings to underframe 1.
Fig. 1, above-mentioned backlight tool are refer to, the lower section of lower plywood 2 is additionally provided with vacuum tube joint 23, vacuum tube joint 23 1
End is connected with first through hole 22, and the other end is connected with vacuum equipment.Vacuum tube joint 23 and the connected mode of first through hole 22, can
To be in a manner of threaded connection or grafting etc., the embodiment of the present application is not limited this.Vacuum equipment mentioned here,
Such as can be vavuum pump, and there is no need for producing absolute vacuum, it is only necessary to make to produce suitable negative pressure in cavity, so that
Display screen on second through hole has enough pressure differences in both sides up and down.Above-mentioned backlight tool, the lower section of lower plywood 2 are additionally provided with
Light source component 6, for providing light source for backlight tool.
In this specification between each embodiment identical similar part mutually referring to.Above-described practicality is new
Type embodiment does not form the restriction to scope of protection of the utility model.
Claims (7)
1. a kind of backlight tool for display screen detection, it is characterised in that including underframe (1), transparent lower plywood (2), close
Seal (3) and transparent top plate (4)；
The underframe (1) is embedded with the lower plywood (2)；
The upper surface of the lower plywood (2) is provided with annular groove (21), and marks off enclosed area by the annular groove (21)
Domain, is provided with first through hole (22) in the closed area, and the first through hole (22) connects the upper surface of the lower plywood (2)
And lower surface；
The sealing ring (3) is installed in the annular groove (21), and the thickness of the sealing ring (3) is more than the annular groove
(21) depth；
The top plate (4) is covered on the sealing ring (3), and common with the lower plywood (2) and the sealing ring (3)
Form cavity；The second through hole of the upper and lower surface of at least one connection top plate is opened up on the top plate (4)
(41)。
2. the backlight tool according to claim 1 for display screen detection, it is characterised in that second through hole (41)
Axis (411) perpendicular to the surface of the top plate (4).
3. the backlight tool according to claim 1 for display screen detection, it is characterised in that also include being located on described
Lid frame (5) on laminate (4), the internal diameter of the lid frame (5) are less than the external diameter of the top plate (4), and the external diameter of lid frame (5) is more than
The external diameter of the top plate (4) and the external diameter of the lower plywood (2), the lid frame (5) are solid by fastener and the underframe (1)
Connect, and by the top plate (4) stationary gland on the sealing ring (3).
4. the backlight tool according to claim 1 for display screen detection, it is characterised in that the top plate (4) is
Quartz glass plate.
5. the backlight tool according to claim 1 for display screen detection, it is characterised in that the lower plywood (2) is
Poly (methyl methacrylate) plate.
6. the backlight tool for being used for display screen detection according to claim any one of 1-5, it is characterised in that the lower floor
Vacuum tube joint (23) is additionally provided with below plate (2), described vacuum tube joint (23) one end is connected with the first through hole (22).
7. the backlight tool according to claim 6 for display screen detection, it is characterised in that under the lower plywood (2)
Side is additionally provided with light source component (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047793.8U CN207096624U (en) | 2017-08-21 | 2017-08-21 | A kind of backlight tool for display screen detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047793.8U CN207096624U (en) | 2017-08-21 | 2017-08-21 | A kind of backlight tool for display screen detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207096624U true CN207096624U (en) | 2018-03-13 |
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ID=61542440
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721047793.8U Active CN207096624U (en) | 2017-08-21 | 2017-08-21 | A kind of backlight tool for display screen detection |
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| Country | Link |
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| CN (1) | CN207096624U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499817A (en) * | 2018-11-23 | 2019-03-22 | 利亚德光电股份有限公司 | LED display casting glue jig and LED display encapsulating method |
-
2017
- 2017-08-21 CN CN201721047793.8U patent/CN207096624U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499817A (en) * | 2018-11-23 | 2019-03-22 | 利亚德光电股份有限公司 | LED display casting glue jig and LED display encapsulating method |
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Address after: 100094 701, 7 floor, 7 building, 13 Cui Hunan Ring Road, Haidian District, Beijing. Patentee after: Lingyunguang Technology Co.,Ltd. Address before: 100094 701, 7 floor, 7 building, 13 Cui Hunan Ring Road, Haidian District, Beijing. Patentee before: Beijing lingyunguang Technology Group Co.,Ltd. Address after: 100094 701, 7 floor, 7 building, 13 Cui Hunan Ring Road, Haidian District, Beijing. Patentee after: Beijing lingyunguang Technology Group Co.,Ltd. Address before: 100094 701, 7 floor, 7 building, 13 Cui Hunan Ring Road, Haidian District, Beijing. Patentee before: LUSTER LIGHTTECH GROUP Co.,Ltd. |