CN104062099A - Testing device and method for LED light strips with side luminance - Google Patents

Testing device and method for LED light strips with side luminance Download PDF

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Publication number
CN104062099A
CN104062099A CN201410336240.9A CN201410336240A CN104062099A CN 104062099 A CN104062099 A CN 104062099A CN 201410336240 A CN201410336240 A CN 201410336240A CN 104062099 A CN104062099 A CN 104062099A
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China
Prior art keywords
lamp bar
led lamp
light
lamp
test board
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Pending
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CN201410336240.9A
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Chinese (zh)
Inventor
张智海
易永祥
李斯文
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Weisheng Suzhou Visual Information Science And Technology Ltd
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Weisheng Suzhou Visual Information Science And Technology Ltd
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Priority to CN201410336240.9A priority Critical patent/CN104062099A/en
Publication of CN104062099A publication Critical patent/CN104062099A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a testing device for LED light strips with side luminance. The testing device comprises the light strips, a light strip carrier, a light strip power module, a light strip testing board, a digital camera and a computing control unit. The light strips are provided with a plurality of LED lights and fixed on the light strip carrier. A plurality of light strips are arranged. The light strip power module supplies power to the LED light strips. The light strip testing board is provided with a light-transmitting device and located above the light strip carrier through a locating device. The digital camera is fixed on the portion above the light strip testing board. The light of the LED lights on the light strips illuminates the digital camera through the light strip testing board. The digital camera is connected with the computing control unit. According to the method, ten to sixty light strips can be tested at the same time, and the speed is increased by 10 times-60 times compared with that of manual work; moreover, uncertainty influence of human factors is avoided, the testing specification takes the numerical value as the standard, the stability and precision are ensured, and the online testing requirement of the LED light strips can be met completely; the cost is saved, the efficiency is improved, and the quality is ensured.

Description

Side-emitting LED lamp bar proving installation and method
Technical field
The present invention relates to a kind of side-emitting LED lamp bar proving installation and method.
Background technology
LED lamp bar test be all generally artificial plug-in again with the mode of visual inspection observe LED lamp light on and off, bright secretly, the problem such as colour cast, its detection speed is slow and resolution characteristic is poor, simultaneously highlighted LED lamp is large to human eye injury, for automatic test approach, industry generally adopts mechanical type by the mode of a test, although precision is high, test speed is slower than manual testing, can not be for the production test of industry spot.
Summary of the invention
In order to overcome the above problems a kind of side-emitting LED lamp bar proving installation and the method for the invention provides, it does not have the uncertainty impact of human factor, stability and precision have been guaranteed, can meet the on-line testing requirement of LED lamp bar completely, in addition, this proving installation and method can realize large-scale LED lamp test, guaranteed quality, and saving cost, raises the efficiency.
In order to overcome the above problems, the technical scheme that the present invention proposes is:
Side-emitting LED lamp bar proving installation, comprise lamp bar and lamp bar carrier, on described lamp bar, there are a plurality of LED lamps, described lamp bar is fixed on lamp bar carrier, also comprise lamp bar power module, lamp bar test board, digital camera and calculation control unit, described lamp bar is many, described lamp bar power module is powered to LED lamp bar, on described lamp bar test board, there is light transmission device, described lamp bar test board is positioned the top of lamp bar carrier by locating device, described digital camera is fixed on the top of lamp bar test board, on lamp bar, the light of LED lamp irradiates on digital camera by lamp bar test board, described digital camera is connected with calculation control unit, described calculation control unit is processed the image that above-mentioned digital camera is taken, determine that LED lamp is that defective products is still certified products definite its particular location.
Being further defined to of technical solution of the present invention, is fixed with PIN pin on lamp bar test board, and PIN pin one end is tied on the pin of lamp bar, and the PIN pin other end is connected with lamp bar power module.
Being further defined to of technical solution of the present invention, described locating device comprises one or more reference columns, the two ends of reference column are individually fixed on lamp bar carrier and lamp bar test board.
Being further defined to of technical solution of the present invention, described light transmission device is light guide, described light guide is fixed on lamp bar test board, described light guide comprises catoptron and is positioned at the second light hole on LED lamp bar test board, described catoptron is fixed on lamp bar test board, the reflecting surface of catoptron is positioned in the lateral light paths of LED lamp, described the second light hole is positioned on the reflected light path of LED lamp, sees through LED lamp bar test board be irradiated to imaging digital camera for the LED light that makes to reflect from catoptron.
Being further defined to of technical solution of the present invention, described light transmission device is light guide, described light guide is fixed on lamp bar test board, described light guide is the second light guide pillar, described the second light guide pillar comprises and is positioned at the incidence surface of vertical direction, is the reflecting surface of 40~65 degree angles with the incidence surface of vertical direction and is positioned at the exiting surface of horizontal direction, and described incidence surface, reflecting surface and exiting surface lay respectively on the reflected light path of LED lamp.
Being further defined to of technical solution of the present invention is atomization surface at the upper surface of described the second light guide pillar.
Based on above technical matters, the invention allows for a kind of side-emitting LED lamp bar method of testing, a plurality of LED lamps on test lamp bar, comprise the steps:
Digital camera is fixed on to lamp bar test board top,
A plurality of lamp bars are fixed on lamp bar carrier,
Lamp bar test board is positioned the top of lamp bar carrier by locating device, lamp batten pin is directly or indirectly connected with lamp bar power module, and the control end of lamp bar power module is connected to calculation control unit;
By lamp bar test board, LED lamp is lighted, is switched lamp bar power module to various test modes, with digital camera, take pictures respectively and obtain the digital picture of lamp bar LED lamp under different power supply states,
Described digital camera is connected with calculation control unit, and correlated digital image transmission, to calculation control unit, is analyzed to the related optical information that draws each LED lamp to be measured under each state,
Calculate respectively described each measured value of state of each LED lamp to be measured and the difference of each state standard value,
Specification limit according to each LED lamp of definition under each state determines that each LED lamp is that defective products is still certified products,
Determine that test is for the particular location of the LED lamp of defective products.
Being further defined to of technical solution of the present invention, or/and colour correction is processed, obtains the optical information of each LED lamp to be measured under each state by clapped image process gamma correction.
Being further defined to of technical solution of the present invention, the brightness of each LED lamp within the related optical information of each state comprises the position of LED lamp and brightness, each color value, light emitting region, light emitting region is or/and the maximal value of color value, minimum value, mean value, standard deviation; Each related optical information exchange of every LED lamp is crossed direct extraction or calculates by set formula, obtain the measured value of each feature of its corresponding each LED lamp under each state, and the standard value comparing difference of each feature under each state corresponding to LED lamp therewith, according to each feature specification limit under each state of each LED lamp of definition, determine that each LED lamp is that defective products is still certified products.
Being further defined to of technical solution of the present invention, the standard value of each feature of each LED lamp under each state is the difference mean value that calculates each pattern measurement value after each LED lamp of certified products standard lamp bar are measured under each state of organizing more.
Beneficial effect
Because the method can be tested many (10~60) simultaneously, speed improves 10~60 times than artificial, and there is no the uncertainty impact of human factor, test specification be take numerical value as standard, guarantee stability and precision, can meet the on-line testing requirement of LED lamp bar completely, saved cost, raise the efficiency, and guaranteed quality.
In addition, because the test of LED lamp bar need to be tested two kinds of situations of high/low electric current, LED lamp light-emitting area is little in addition, concentrations, and the situation of subregion overexposure in the time of can causing camera imaging, also can have relatively high expectations to the dynamic range of camera like this.By increasing sprayed film, can lower the accuracy requirement to camera, improve the accuracy of the data of measuring.
Accompanying drawing explanation
Fig. 1 is side-emitting LED lamp bar proving installation structural representation of the present invention;
Fig. 2 is the first lamp bar test board and the lamp bar carrier composite structure schematic diagram that the present invention illustrates pin orientation;
Fig. 3 is the second lamp bar test board and the lamp bar carrier composite structure schematic diagram that the present invention illustrates pin orientation;
Fig. 4 side-emitting LED lamp of the present invention bar carrier and be fixed on the lamp bar test board the first example structure schematic diagram on side-emitting LED lamp bar carrier;
Fig. 5 side-emitting LED lamp of the present invention bar carrier and be fixed on the lamp bar test board the second example structure schematic diagram on side-emitting LED lamp bar carrier;
Fig. 6 side-emitting LED lamp of the present invention bar carrier and the lamp bar test board being fixed on side-emitting LED lamp bar carrier add atomization face the second example structure schematic diagram;
Fig. 7 side-emitting LED lamp of the present invention bar carrier and the lamp bar test board being fixed on side-emitting LED lamp bar carrier add sprayed film the second example structure schematic diagram;
In figure, 1 lamp bar, 2 lamp bar test boards, 3PIN pin, 4 lamp batten pins, 5LED lamp, 6 lamp bar carriers, 7 lamp bar power modules, 8 digital cameras, 9 calculation control unit, 10 light transmission devices, 11 locating devices, 12 atomization faces, 15 sprayed films, 16 second light holes, 17 catoptrons, 18 second light guide pillars
Embodiment
Embodiment mono-: as shown in Figure 1, side-emitting LED lamp bar proving installation, comprise lamp bar 1, lamp bar carrier 6, lamp bar power module 7, lamp bar test board 2, digital camera 8 and calculation control unit 9, on described lamp bar 1, there are a plurality of LED lamps 5, lamp bar 1 is many, described lamp bar 1 is fixed on lamp bar carrier 6, described lamp bar power module 7 is powered indirectly by 2 pairs of lamp bars 1 of lamp bar test board, the lamp batten pin 4 of lamp bar 1 is connected on lamp bar test board 2, the power end of described lamp bar test board 2 is connected with lamp bar power module 7, the control end of described lamp bar power module 7 is connected to calculation control unit 9.Embodiment, as shown in Figure 1, is fixed with PIN pin 3 on lamp bar test board 2, and PIN pin 3 one end are tied on the lamp batten pin 4 of lamp bar 1, and PIN pin 3 other ends are connected with lamp bar power module 7.On described lamp bar test board 2, there is light transmission device 10, described lamp bar test board 2 is positioned the top of lamp bar carrier 6 by locating device 11, as shown in Figure 4, described locating device 11 comprises reference column, and the two ends of reference column are individually fixed on lamp bar carrier 6 and lamp bar test board 2.Described digital camera 8 is fixed on the top of lamp bar test board 2, and on lamp bar 1, the light of LED lamp 5 irradiates on digital camera 8 by lamp bar test board 2.As shown in Figure 4, described light transmission device is light guide, described light guide is fixed on lamp bar test board, described light guide comprises catoptron 17 and is positioned at the second light hole 16 on LED lamp bar test board 2, described catoptron 17 is fixed on lamp bar test board 2, the reflecting surface of catoptron 17 is positioned in the lateral light paths of LED lamp 5, described the second light hole 16 is positioned on the reflected light path of LED lamp 5, and the second light hole 16 seeing through LED lamp bar test board 2 for the LED light that makes to reflect from catoptron 17 is irradiated to imaging on digital camera 8.Described digital camera 8 is connected with calculation control unit 9, because the test of LED lamp bar need to be tested two kinds of situations of high/low electric current, by calculation control unit 9, controlled the illuminance of described LED lamp 5 to be measured, make the state of LED lamp 5 to be measured be set to bright or go out, described calculation control unit 9 is processed the image that above-mentioned digital camera 8 is taken, analyze the related optical information of each LED lamp 5, described related optical information comprises that position and brightness, color are or/and light emitting region information.Further, the brightness of each LED lamp within the related optical information of each state comprises the position of LED lamp and brightness, each color value, light emitting region, light emitting region is or/and maximal value of color value, minimum value, mean value, standard deviation etc.Through certain measured value that obtains the bright of LED lamp 5 to be measured or go out of processing, calculate respectively the difference of the bright of described LED lamp 5 to be measured or the measured value going out and standard value, according to the specification limit of the certified products of definition, determine that LED lamp 5 is for defective products is still for certified products is also determined its particular location.Each related optical information for above-mentioned every LED lamp can be calculated by direct extraction or set formula, obtain the measured value of each LED lamp each feature under each state of its correspondence, and the standard value comparing difference of each feature under each state corresponding to LED lamp therewith.According to the specification limit of each feature under each state of each LED lamp of definition, determine that LED lamp 5 is for defective products is still for certified products is also determined its particular location.
The standard value of each feature for each LED lamp under each state can calculate the difference mean value of each pattern measurement value for choosing each LED lamp of many group certified products standard lamp bars 1 after each state card is measured.Above-mentioned certain processing comprises that gamma correction, colour correction are or/and distortion correction etc.
Shown in Fig. 2, because lamp batten pin 4 or test point are in one end of lamp bar 1, so lamp bar test board 2 can not block light and the imaging of LED lamp.Shown in Fig. 3, because lamp batten pin 4 or test point are in the centre of lamp bar 1, lamp bar test board 2 and PIN pin 3 may block light and the imaging of LED lamp.So, can on lamp bar test board 2, add light hole or add light guide, allow LED lamp wiring not be blocked and imaging.Because, there is the design of a lot of lamp bars 1, it tests dials (energising test is used) not in one end of lamp bar 1, and can be in some position, the centre of lamp bar 1.If design PIN pin 3 powers up in these positions, so fixedly the lamp bar test board 2 of PIN pin 3 and PIN pin 3 itself all may block LED lamp 5 to be measured (just luminous and side-emitting LED lamp all may be blocked).In order to overcome such problem, outside the scope of the photoconduction of LED lamp 5 being blocked to lamp bar test board 2 and PIN pin 3 with light transmission device 10, make the LED lamp 5 can be by the complete imaging of taking pictures of digital camera 8.
Concrete measuring method is as follows: after will many lamp bars 1 (or yoke plate) location, with fixing PIN pin 3, power to light together for industrial digital camera 8 and take pictures, obtain the related optical information (brightness of the LED lamp of all lamp bars, color, position, light emitting region etc.), if the lamp bar 1 with the standard model of a plurality of certified products, and be provided with normalized current, voltage, so clap image in the related optical information of each LED lamp 5 of analyzing, through certain (gamma correction of processing, colour correction is or/and distortion correction etc.) obtain the mean value separately of the measured value of each LED lamp 5, just can think the standard value of each LED lamp 5, the specification limit as basis definition certified products of take again, carry out in the same way the test of product to be tested, compare and measure respectively value whether in the specification of standard value, just can tell fast bad LED lamp 5 and position thereof.
Because there has been light hole, just can directly on these plates, punch and wear PIN pin 3, carry out the cabling of power supply, the position of PIN pin 3 also can unrestrictedly can not covered the light (for PCBA for electrical testing points not in the situation at two ends) of gear LED lamp 5 equally, by appropriate cloth card clothing line, just can not keep off LED lamp 5 to the light of camera, get around the path of light.
Embodiment bis-
As shown in Figure 5, be with embodiment mono-difference, described light guide is the second light guide pillar 18, described the second light guide pillar 18 comprises upper end and bottom, described upper end is tetragonal body, described bottom is that horizontal longitudinal section is the wedge of equilateral triangle, the vertical plane of described wedge is incidence surface, the inclined-planes that are 40~65 degree angles with the incidence surface of vertical direction are reflecting surface, the upper surface of tetragonal body is exiting surface, described incidence surface and reflecting surface are certain angle, and described angle is 40~65 degree.Described incidence surface, reflecting surface and exiting surface lay respectively on the reflected light path of LED lamp 5.The second light guide pillar 18 is fixed on lamp bar test board 2, and be positioned at corresponding each side-emitting LED lamp 5 light-emitting window near, to guarantee that it can derive the light of each LED lamp accurately vertically upward, by digital camera 8, photographed the ideal image of non-angular difference.As shown in Figure 6 and Figure 7, because 1 test of LED lamp bar need to be tested two kinds of situations of high/low electric current, in addition LED lamp 5 light-emitting areas are little, concentrations, the situation of subregion overexposure in the time of can causing camera imaging, the data of measuring like this will be not accurate enough, thereby the accuracy that impact is measured also can be had relatively high expectations to the dynamic range of camera like this.In order to improve this kind of situation, can be processed into atomization surface at the upper surface of the second light guide pillar of side-emitting LED lamp 5, at this atomization surface place, place a transparent panel (glass or plastics), an or uniform sprayed film 15 or its lower surface is polished into atomization face on surface label thereon, the light that LED lamp 5 is penetrated forms a sizeable hot spot thereon, can not hand over also with the near hot spot of neck.
Upper surface at described the second light guide pillar 18 is atomization surface, upper surface at the second light guide pillar 18 sticks the uniform sprayed film 15 of one deck or its upper surface is polished into one deck atomization face 12 specifically, can make the light of LED lamp 5 on sprayed film 15 or photoconduction light-emitting window, form more uniform hot spot, also can reduce the light directionality impact of light-emitting window.In addition, be with above-described embodiment difference, the lamp batten pin 4 on described LED lamp bar 1 causes the edge of lamp bar carrier 6 by lamp bar carrier 6, and lamp bar power module 7 is directly connected with the lamp batten pin at lamp bar carrier 6 edges.
Embodiment tri-
Being with embodiment bis-differences, at the second light hole 16 places, being fixed with printing opacity post, is atomization face 12 at the upper surface of described printing opacity post.Also upper surface that can printing opacity post sticks one deck sprayed film 15.
Embodiment tetra-
Based on above embodiment, the invention allows for a kind of side-emitting LED lamp bar method of testing, a plurality of LED lamps 5 on test lamp bar 1, comprise the steps:
Digital camera 8 is fixed on to lamp bar test board 2 tops,
A plurality of lamp bars 1 are fixed on lamp bar carrier 6,
Lamp bar test board 2 is positioned the top of lamp bar carrier 6 by locating device 11, (light emission direction of considering side-emitting LED lamp is level, at the luminous light guide for side (catoptron 17 or light guide pillar) of LED lamp 5 by the photoconduction of horizontal direction to vertical direction, allow be fixed on lamp bar test board 2 directly over industrial digital camera 8 can non-angular impact the light that photographed LED lamp.)
The lamp batten pin 4 of lamp bar 1 is connected on lamp bar test board 2, and the power end of described lamp bar test board 2 is connected with lamp bar power module 7, and the control end of lamp bar power module 7 is connected to calculation control unit 9;
By lamp bar test board 2, LED lamp 5 is lighted, switched lamp bar power module 7 to various test modes, the digital picture of LED lamp 5 under different power supply states of taking pictures respectively and obtaining lamp bar 1 with digital camera 8,
Described digital camera 8 is connected with calculation control unit 9, and correlated digital image transmission, to calculation control unit 9, is analyzed to the related optical information that draws each LED lamp 5 to be measured under each state,
Related optical information is carried out to gamma correction, colour correction or/and distortion correction is processed, and the measured value of LED lamp to be measured under each state,
Calculate respectively each measured value of state of described LED lamp 5 to be measured and the difference of each state standard value,
According to the specification limit of the certified products of definition, determine that LED lamp 5 is that defective products is still certified products,
Determine that test is for the particular location of the LED lamp 5 of defective products.
Wherein, the brightness of above-mentioned each LED lamp within the related optical information of each state comprises the position of LED lamp and brightness, each color value, light emitting region, light emitting region is or/and maximal value of color value, minimum value, mean value, standard deviation etc.Through certain measured value that obtains the bright of LED lamp 5 to be measured or go out of processing, calculate respectively the difference of the bright of described LED lamp 5 to be measured or the measured value going out and standard value, according to the specification limit of the certified products of definition, determine that LED lamp 5 is for defective products is still for certified products is also determined its particular location.Each related optical information for above-mentioned every LED lamp can be calculated by direct extraction or set formula, obtain the measured value of each LED lamp each feature under each state of its correspondence, and the standard value comparing difference of each feature under each state corresponding to LED lamp therewith.According to the specification limit of each feature under each state of each LED lamp of definition, determine that LED lamp 5 is for defective products is still for certified products is also determined its particular location.The standard value of each feature for each LED lamp under each state can calculate the difference mean value of each pattern measurement value for choosing each LED lamp of many group certified products standard lamp bars 1 after each state card is measured.

Claims (10)

1. side-emitting LED lamp bar proving installation, comprise lamp bar and lamp bar carrier, on described lamp bar, there are a plurality of LED lamps, described lamp bar is fixed on lamp bar carrier, it is characterized in that: also comprise lamp bar power module, lamp bar test board, digital camera and calculation control unit, described lamp bar is many, described lamp bar power module is powered to LED lamp bar, on described lamp bar test board, there is light transmission device, described lamp bar test board is positioned the top of lamp bar carrier by locating device, described digital camera is fixed on the top of lamp bar test board, on lamp bar, the light of LED lamp irradiates on digital camera by lamp bar test board, described digital camera is connected with calculation control unit, described calculation control unit is processed the image that above-mentioned digital camera is taken, determine that LED lamp is that defective products is still certified products definite its particular location.
2. side-emitting LED lamp bar proving installation according to claim 1, is characterized in that: on lamp bar test board, be fixed with PIN pin, PIN pin one end is tied on the pin of lamp bar, and the PIN pin other end is connected with lamp bar power module.
3. side-emitting LED lamp bar proving installation according to claim 1 and 2, is characterized in that: described locating device comprises one or more reference columns, and the two ends of reference column are individually fixed on lamp bar carrier and lamp bar test board.
4. side-emitting LED lamp bar proving installation according to claim 1 and 2, it is characterized in that: described light transmission device is light guide, described light guide is fixed on lamp bar test board, described light guide comprises catoptron and is positioned at the second light hole on LED lamp bar test board, described catoptron is fixed on lamp bar test board, the reflecting surface of catoptron is positioned in the lateral light paths of LED lamp, described the second light hole is positioned on the reflected light path of LED lamp, for the LED light that makes to reflect from catoptron, see through LED lamp bar test board and be irradiated to imaging digital camera.
5. side-emitting LED lamp bar proving installation according to claim 1 and 2, it is characterized in that: described light transmission device is light guide, described light guide is fixed on lamp bar test board, described light guide is the second light guide pillar, described the second light guide pillar comprises and is positioned at the incidence surface of vertical direction, is the reflecting surface of 40~65 degree angles with the incidence surface of vertical direction and is positioned at the exiting surface of horizontal direction, and described incidence surface, reflecting surface and exiting surface lay respectively on the reflected light path of LED lamp.
6. side-emitting LED lamp bar proving installation according to claim 5, is characterized in that: the upper surface at described the second light guide pillar is atomization surface.
7. side-emitting LED lamp bar method of testing, a plurality of LED lamps on test lamp bar, is characterized in that: comprise the steps:
Digital camera is fixed on to lamp bar test board top,
A plurality of lamp bars are fixed on lamp bar carrier,
Lamp bar test board is positioned the top of lamp bar carrier by locating device, lamp batten pin is directly or indirectly connected with lamp bar power module, and the control end of lamp bar power module is connected to calculation control unit;
By lamp bar test board, LED lamp is lighted, is switched lamp bar power module to various test modes, with digital camera, take pictures respectively and obtain the digital picture of lamp bar LED lamp under different power supply states,
Described digital camera is connected with calculation control unit, and correlated digital image transmission, to calculation control unit, is analyzed to the related optical information that draws each LED lamp to be measured under each state,
Calculate respectively described each measured value of state of each LED lamp to be measured and the difference of each state standard value,
Specification limit according to each LED lamp of definition under each state determines that each LED lamp is that defective products is still certified products,
Determine that test is for the particular location of the LED lamp of defective products.
8. side-emitting LED lamp bar method of testing according to claim 7, is characterized in that: clapped image is passed through to gamma correction or/and colour correction, or/and distortion correction is processed, obtains the optical information of each LED lamp to be measured under each state.
9. according to the side-emitting LED lamp bar method of testing described in claim 7 or 8, it is characterized in that: the brightness of each LED lamp within the related optical information of each state comprises the position of LED lamp and brightness, each color value, light emitting region, light emitting region is or/and the maximal value of color value, minimum value, mean value, standard deviation; Each related optical information exchange of every LED lamp is crossed direct extraction or calculates by set formula, obtain the measured value of each feature of its corresponding each LED lamp under each state, and the standard value comparing difference of each feature under each state corresponding to LED lamp therewith, according to each feature specification limit under each state of each LED lamp of definition, determine that each LED lamp is that defective products is still certified products.
10. according to the side-emitting LED lamp bar method of testing described in claim 7 or 8, it is characterized in that: the standard value of each feature of each LED lamp under each state is the difference mean value that calculates each pattern measurement value after each LED lamp of certified products standard lamp bar are measured under each state of organizing more.
CN201410336240.9A 2014-07-16 2014-07-16 Testing device and method for LED light strips with side luminance Pending CN104062099A (en)

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CN106526344A (en) * 2015-09-09 2017-03-22 台达电子电源(东莞)有限公司 Electronic product testing device and electronic product testing system
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CN109799070A (en) * 2017-11-17 2019-05-24 和硕联合科技股份有限公司 Test of light source device
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CN109959499A (en) * 2017-12-26 2019-07-02 宁波方太厨具有限公司 A kind of kitchen ventilator lamp illumination test device
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Application publication date: 20140924