CN110488515A - The LED light bar detection device and method of backlight - Google Patents
The LED light bar detection device and method of backlight Download PDFInfo
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- CN110488515A CN110488515A CN201910722689.1A CN201910722689A CN110488515A CN 110488515 A CN110488515 A CN 110488515A CN 201910722689 A CN201910722689 A CN 201910722689A CN 110488515 A CN110488515 A CN 110488515A
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- light
- shield layer
- personal computer
- industrial personal
- led light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Image Input (AREA)
Abstract
The invention discloses the LED light bar detection devices and method of a kind of backlight, are related to backlight detection technique field.Technical points include industrial personal computer and carrier, it further include the digital camera of signal connection industrial personal computer, the carrier includes the placed side being disposed opposite to each other and detection faces, the lamp bar slot placed for lamp bar is offered on the placed side, several light source holes being put into for LED light are offered on the bottom wall of the lamp bar slot along its length, light source hole is equipped with shading baffle far from lamp bar slot side；The shading baffle include main body loose light shield layer and be arranged on loose light shield layer be in bar code shape fine and close light shield layer；The digital camera is towards detection faces, and for shooting the image information for obtaining shading baffle in detection faces, the present invention has the advantages that be not easy to omit to LED luminance detection effect stabilization.
Description
Technical field
The present invention relates to backlight detection technique fields, more specifically, it relates to which a kind of LED light bar of backlight detects
Device and method.
Background technique
Since the energy-saving effect of LED light is good, long service life, luminance is high and substantially athermic advantage, so that LED light
It is widely used under the scene of various illuminations.On the backlight of existing liquid crystal display, generally provided using LED light bar
Light source, cooperation light guide plate realize the Integral luminous of backlight.
The luminance test mode of LED light bar in the prior art, general use observe by the naked eye brightness in LED light bar,
Whether the brightness to judge LED light bar is qualified；Therefore subjective, different people for brightness whether He Ge threshold requirement
Difference, there are difference between standard；The case where being omitted simultaneously there is likely to be detection.
Summary of the invention
Problem in view of the prior art, the first object of the present invention are to provide a kind of LED light bar detection dress of backlight
It sets, has the advantages that LED luminance detection effect stabilization is not easy to omit.
To achieve the above object, the present invention provides the following technical scheme that a kind of LED light bar detection device of backlight,
It further include the digital camera of signal connection industrial personal computer, the carrier includes the placed side being disposed opposite to each other including industrial personal computer and carrier
And detection faces, the lamp bar slot placed for lamp bar is offered on the placed side, is opened along its length on the bottom wall of the lamp bar slot
Equipped with several light source holes being put into for LED light, light source hole is equipped with shading baffle far from lamp bar slot side；The shading baffle packet
It includes the loose light shield layer of main body and the fine and close light shield layer on loose light shield layer in bar code shape is set；The digital camera court
To detection faces, for shooting the image information for obtaining shading baffle in detection faces.
By using above-mentioned technical proposal, after lamp bar is put into lamp bar slot, and LED light is put into light source hole；LED light is lighted
Afterwards, light source is radiated on shading baffle；Loose light shield layer can be penetrated in the light source part that LED light issues, but can not be penetrated
Fine and close light shield layer；Therefore when the brightness of light source is bigger, the luminance difference between loose light shield layer and fine and close light shield layer will be bigger.And
When brightness reaches certain value, the shape of bar code shape can be clearly indicated on shading baffle；To which digital camera is shot
Photo will obtain the pattern of bar code shape.To which industrial personal computer is by bar code recognition, if bar code figure can be identified
Then illustrate that LED luminance meets the requirements, image so illustrates that LED luminance is undesirable if can not identify.To sum up reach, detects
Luminance threshold judge it is objective, reach to LED luminance detection effect stabilization be not easy the advantages of omitting.
The present invention is further arranged to: the densification light shield layer is pasted on loose light shield layer towards on the end face of placed side.
By using above-mentioned technical proposal, by fine and close light shield layer and loose light shield layer by way of stickup, compared to
Fine and close light shield layer is applied to the mode of loose light shield layer, fine and close light shield layer and loose light shield layer can process system with separate machined
It makes more convenient.
The present invention is further arranged to: the loose light shield layer is white.
By using above-mentioned technical proposal, light source generally exists under the blocking of fine and close light shield layer, and shading baffle is towards detection
It is in black on the end face in face.And color difference is maximum between white and black, know the image of bar code convenient for industrial personal computer
Not.
The present invention is further arranged to: the bar code shape of the densification light shield layer corresponds to unique number.
By using above-mentioned technical proposal, the bar code shape of fine and close light shield layer corresponds to unique number, therefore is detecting
When, the corresponding number of each LED light；The LED light of corresponding position is indicated if it can scan acquisition number after sensing
Qualification, not obtaining number then indicates that the LED light of corresponding position is not present or unqualified, to realize the phase by number
Machine, industrial personal computer can independently judge that the LED light brightness of which position is qualified, and the LED light brightness of which position is unqualified.
The present invention is further arranged to: placed side corresponding light source hole is provided with indicator light, the indicator light electrical connection
Industrial personal computer.
By using above-mentioned technical proposal, indicator light plays indicative function, and industrial personal computer can be referred to by controlling corresponding position
The light on and off for showing lamp, play the role of instruction.
The present invention is further arranged to: being bonded with sealing ring on the opening inner wall of the light source hole.
By using above-mentioned technical proposal, sealing ring is for blocking light, so that the light of LED light will not be from light source hole
It projects, guarantees that the brightness of LED light will not excessively scatter and disappear.
The present invention is further arranged to: the side side wall of the light source hole, and is pasted on the side wall being obliquely installed reflective
Film, the side wall being obliquely installed it is high-end towards placed side side.
By using above-mentioned technical proposal, LED light issues light source in addition to just penetrating, and there is also be partially that side wall issues light source
, therefore for such sending light source in such a way that sloped sidewall cooperates reflective membrane, side wall can be issued to the LED light of light source
Light reflection to shading baffle on.
According to the LED light bar detection method of backlight described in the first purpose, comprising:
Step 1, industrial personal computer is lamp bar energization lightening LED lamp；
Step 2, industrial personal computer obtains the image information of digital camera shooting；
Step 3, the number information of the bar code in industrial personal computer identification image information；
Step 4, industrial personal computer compares the number of identification and the number information of typing, obtains unidentified number information, and be labeled as
It is unqualified；
Step 5, industrial personal computer lights the corresponding indicator light of underproof number.
By using above-mentioned technical proposal, shooting image is judged by industrial personal computer；Bar code on shading baffle in shooting image
Brightness be to meet the requirements, then industrial personal computer can get the information of bar code, otherwise cannot.Pass through the number of the bar code of acquisition
Amount can obtain the quantity of LED light, and judging result is more objective.Additionally, due to the bar code number information of brightness qualification, work
Control machine can barcode scanning pass through；Thus typing and the bar code scanning information that can not be read are the underproof coding letter of brightness
Breath.To which corresponding LED light can be quickly found out by underproof number.
Compared with prior art, the beneficial effects of the present invention are:
(1) bar code is identified by industrial personal computer to judge whether the LED light brightness of lamp bar reaches threshold value by setting, judgement is more
It is objective；
(2) by the way that each bar code is arranged to unique number, underproof LED light can be rapidly obtained by number
Position.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present embodiment；
Fig. 2 is the diagrammatic cross-section of carrier in the present embodiment；
Fig. 3 is the enlarged diagram of A in Fig. 2.
Appended drawing reference: 1, industrial personal computer；2, support frame；3, carrier；4, digital camera；5, bottom plate；6, support leg；7, it places
Face；8, detection faces；9, lamp bar slot；10, light source hole；11, shading baffle；12, loose light shield layer；13, fine and close light shield layer；14, refer to
Show lamp；15, sealing ring；16, reflective membrane；17, light compensating lamp.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention will be described in detail.
Embodiment, a kind of LED light bar detection device of backlight, as shown in Figure 1, including industrial personal computer 1, support frame 2, carrier
3 and digital camera 4.Support frame 2 includes the bottom plate 5 and four support legs being fixed on four corners of bottom plate 5 vertically of rectangle
6.Carrier 3 is fixedly installed in the upside of four support legs 6, and has between the downside end face of carrier 3 and the bottom plate 5 of support frame 2
Spacing forms bottom chamber；Digital camera 4 is fixed on bottom plate 5 and is located within bottom chamber；The camera of digital camera 4
Towards the bottom surface of carrier 3, for shooting the image of 3 bottom surface of carrier.
As shown in Figure 1 and Figure 2, carrier 3 includes the detection faces 8 that the placed side 7 and lower end surface of upper surface is arranged in, placed side 7
On offer several lamp bar slots 9 placed for lamp bar in parallel, offer several confessions along its length on the bottom wall of lamp bar slot 9
The light source hole 10 that LED light is put into；And the shading baffle 11 for blocking 10 bottom of light source hole is provided in detection faces 8.Digital filming
3 bottom surface of carrier obtains the image information of each shading baffle 11 in 3 detection faces 8 of carrier.1 signal of industrial personal computer connects digital camera 4
For obtaining the image information of the shooting of digital camera 4.
As shown in Figure 2 and Figure 3, shading baffle 11 includes the loose light shield layer 12 of main body and is arranged on loose light shield layer 12
In the fine and close light shield layer 13 of bar code shape；Loose light shield layer 12 is light screening material, but there is permission light on loose light shield layer 12
The tiny gap that line penetrates, can see that its another side end face light is blocked and generates projection in a side end face, loose
The material of light shield layer 12 can be paper, curtain and film；Fine and close light shield layer 13 is also light screening material, and light can not pass through cause
Close light shield layer 13 such as stamps light beam in a side end face of fine and close light shield layer 13, another side end face of fine and close light shield layer 13 without
Method sees this Shu Guang.Fine and close light shield layer 13 is pasted and fixed on loose light shield layer 12, and fine and close light shield layer 13 is in bar code shape, and
Bar code shape on each shading baffle 11 corresponds to unique number.
As shown in Figure 2 and Figure 3, therefore when the LED light in light source hole 10 is lighted, light source is radiated on shading baffle 11；And
Loose light shield layer 12 can be penetrated in the light source part that LED light issues, and can not be through fine and close light shield layer 13；Therefore when light source
Brightness is bigger, and there is only loose light shield layer 12 and the luminance difference that is pasted between the loose light shield layer 12 of fine and close light shield layer 13 will
It is bigger.Therefore when brightness reaches certain value, the shape of bar code can be clearly indicated on shading baffle 11；To digital phase
The photo that machine 4 is shot will obtain the pattern of bar code and see Fig. 1 in digital camera 4() designated position on.And industrial personal computer 1 obtains
After the image data that digital camera 4 is shot, corresponding clear bar code shape can be got only by bar code online recognition
One number, and unsharp bar code shape will be unable to identify.Therefore the shading of unique number can be got in this stage
On the contrary baffle 11 corresponding LED light is that brightness reaches threshold value, then be not reach threshold value.
And in order to obtain the unique number of the corresponding shading baffle 11 of the LED light of not up to threshold value, there is typing in industrial personal computer 1
The number information of all bar codes.After 1 scan image information of industrial personal computer, all numbers of acquisition and the number of typing are right one by one
Than the number being not present in the number of typing is not up to the number of threshold value then for brightness in all number informations.And due to each
The corresponding unique number of a shading baffle 11, therefore corresponding light source hole can be found by being not up to the number of threshold value
10 positions.
Further, as shown in Fig. 2, 7 corresponding light source hole 10 of placed side is provided with indicator light 14, indicator light 14 is electrically connected work
Control machine 1.Indicator light 14 is controlled light on and off by industrial personal computer 1, and two dimensional code on shading baffle 11 in 14 corresponding light source hole 10 of indicator light
Number.Whether industrial personal computer 1 reaches the bright of threshold value control instructions lamp 14 based on the corresponding number of indicator light 14 or goes out.The present embodiment
In, industrial personal computer 1 will light the indicator light 14 of not up to threshold value reference numeral, so that indicator light 14 is not up to threshold value as brightness
Indicator light 14.
Further, as shown in Figure 2 and Figure 3, the longitudinal section of light source hole 10 is in rectangle, and the opening of light source hole 10 is bonded
There is a sealing ring 15 of annular, the inner wall of sealing ring 15 is to extending on the inside of light source hole 10, when the LED light in lamp bar is inserted into light source hole
After in 10, sealing ring 15 can block the edge of light source hole 10, and part light source is avoided to leak out from the edge that light source hole 10 is open.
Meanwhile the side side wall in light source hole 10 is in high-end being obliquely installed towards placed side 7, so that light source hole 10 is in placed side 7 one
The big circular platform type of small 8 area of detection faces of lateral area.And reflective membrane 16 is pasted on the side wall that is obliquely installed of light source hole 10, therefore
When testing the LED light of side wall sending light source, it is in vertical that the light reflection by level of reflective membrane 16 is cooperated by sloped sidewall
Light, can will side wall issue light source LED light light reflection to shading barrier on.
As shown in Figure 1, being fixed with the light compensating lamp 17 for being located on 4 outside of digital camera, light filling in the bottom chamber of support frame 2
Lamp 17 in a ring, for providing the light source towards detection faces 8 so that digital camera 4 shoot will not be excessively dark.
To sum up, when the lamp bar that needs are detected is placed into the lamp bar slot 9 on 3 placed side 7 of carrier, and electricity is connected for lamp bar
Behind source, detection method of the industrial personal computer 1 to lamp bar are as follows:
Step 1, industrial personal computer 1 is lamp bar energization lightening LED lamp；
Step 2, industrial personal computer 1 obtains the image information that digital camera 4 is shot；
Step 3, industrial personal computer 1 identifies the number information of the bar code in image information；
Step 4, industrial personal computer 1 compares the number of identification and the number information of typing, obtains unidentified number information, and be labeled as
It is unqualified；
Step 5, industrial personal computer 1 lights the corresponding indicator light 14 of underproof number.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of LED light bar detection device of backlight, including industrial personal computer (1) and carrier (3), it is characterised in that: further include letter
The digital camera (4) of number connection industrial personal computer (1), the carrier (3), including the placed side (7) being disposed opposite to each other and detection faces (8),
The lamp bar slot (9) placed for lamp bar is offered on the placed side (7), is opened along its length on the bottom wall of the lamp bar slot (9)
Equipped with several light source holes (10) being put into for LED light, light source hole (10) is equipped with shading baffle far from lamp bar slot (9) side
(11)；The shading baffle (11) includes the loose light shield layer (12) of main body and is arranged on loose light shield layer (12) in bar code
The fine and close light shield layer (13) of shape；The digital camera (4) obtains shading on detection faces (8) towards detection faces (8), for shooting
The image information of baffle (11).
2. the LED light bar detection device of backlight according to claim 1, it is characterised in that: the densification light shield layer
(13) it is pasted on the end face of loose light shield layer (12) towards placed side (7).
3. the LED light bar detection device of backlight according to claim 1, it is characterised in that: the loose light shield layer
It (12) is white.
4. the LED light bar detection device of backlight according to claim 1, it is characterised in that: the densification light shield layer
(13) bar code shape corresponds to unique number.
5. the LED light bar detection device of backlight according to claim 4, it is characterised in that: the placed side (7) is corresponding
Light source hole (10) is provided with indicator light (14), and the indicator light (14) is electrically connected industrial personal computer (1).
6. the LED light bar detection device of backlight according to claim 1, it is characterised in that: the light source hole (10)
Sealing ring is bonded on opening inner wall.
7. the LED light bar detection device of backlight according to claim 1, it is characterised in that: the light source hole (10)
Side side wall, and reflective membrane (16) are pasted on the side wall being obliquely installed, the side wall being obliquely installed it is high-end towards placement
Face (7) side.
8. a kind of detection method of the LED light bar detection device using backlight as claimed in claim 7, it is characterised in that: packet
It includes:
Step 1, industrial personal computer (1) is lamp bar energization lightening LED lamp；
Step 2, industrial personal computer (1) obtains the image information of digital camera (4) shooting；
Step 3, the number information of the bar code in industrial personal computer (1) identification image information；
Step 4, industrial personal computer (1) compares the number of identification and the number information of typing, obtains unidentified number information, and mark
It is unqualified；
Step 5, industrial personal computer (1) lights the corresponding indicator light (14) of underproof number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910722689.1A CN110488515B (en) | 2019-08-06 | 2019-08-06 | LED light bar detection device and method of backlight source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910722689.1A CN110488515B (en) | 2019-08-06 | 2019-08-06 | LED light bar detection device and method of backlight source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110488515A true CN110488515A (en) | 2019-11-22 |
| CN110488515B CN110488515B (en) | 2020-07-07 |
Family
ID=68550028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910722689.1A Active CN110488515B (en) | 2019-08-06 | 2019-08-06 | LED light bar detection device and method of backlight source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113505622A (en) * | 2021-06-01 | 2021-10-15 | 深圳市亿联无限科技有限公司 | Test system and method for automatically identifying multiple bar codes and LED lamps |
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