CN206804279U - LED maximum spoke brightness measuring device for camera - Google Patents
LED maximum spoke brightness measuring device for camera Download PDFInfo
- Publication number
- CN206804279U CN206804279U CN201720603948.5U CN201720603948U CN206804279U CN 206804279 U CN206804279 U CN 206804279U CN 201720603948 U CN201720603948 U CN 201720603948U CN 206804279 U CN206804279 U CN 206804279U
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- module
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- measurement module
- brightness
- stepper motor
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- 238000005259 measurement Methods 0.000 claims abstract description 62
- 238000013519 translation Methods 0.000 claims abstract description 34
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 238000005286 illumination Methods 0.000 claims description 24
- 238000005375 photometry Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000000258 photobiological effect Effects 0.000 description 3
- 241001062009 Indigofera Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0242—Control or determination of height or angle information of sensors or receivers; Goniophotometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0403—Mechanical elements; Supports for optical elements; Scanning arrangements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2604—Test of external equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
This patent discloses a kind of LED maximums spoke brightness measuring device for camera, its device includes：Removable optical table module, brightness measurement module, illuminance feedback measurement module, control module.The removable optical table module includes four submodules：Electric rotary table, motorized precision translation stage, the first stepper motor drive module, the second stepper motor drive module；Described electric rotary table and motorized precision translation stage central axis is located on the same line；Detected LED is placed on electric rotary table；The brightness measurement module and illuminance feedback measurement module are placed on motorized precision translation stage, and the camera lens front end of brightness measurement module is in the same space vertical plane with illuminance feedback measurement module；The control module is connected by wired mode with removable optical table module and illuminance feedback measurement module.This patent significantly simplifies maximum spoke brightness measurement system in the measurement of LED blue light harms.
Description
Technical field
This patent is related to a kind of optical radiation measurement device, more particularly to a kind of LED maximums spoke brightness measuring device for camera.
Background technology
Light source and light fixture and human lives are closely bound up, but the improper exposure spoke of illuminating product may produce a variety of photo-biologicals
Harm.With widely available, the photoproduction that people have for " blue light harm " this LED light source institute protrusion of LED illumination lamp
The concern of thing security also becomes increasingly strong.The production firm of LED light source is badly in need of a kind of easily detecting instrument and completed to indigo plant
Light endangers the certification of security, and consumer then want to by lighting environment of the pertinent instruments quick detection residing for it whether
Safety.However, the photo-biological safety detecting instrument developed according to relevant criterion, is carried out all for any type of light fixture
The photo-biological security test of species, therefore have that volume is big, speed is slow, is not easy to the shortcomings of routine use.
A kind of LED maximums spoke brightness measuring device for camera that this patent is related to, its main purpose is for the fast of LED blue light harms
In fast detection method, the detection of the maximum effectively spoke brightness of LED.Because in LED blue light harm detection methods, it is desirable to measure LED
Maximum effectively spoke brightness, the problem of being related to two aspects：First, needing to find the direction that LED produces maximum spoke brightness, make it
Face luminance meter camera lens；Second, being provided in national standard, produced in LED on the direction of maximum spoke brightness, it is necessary to produce 500lx in LED
At illumination, LED spoke brightness is detected.A kind of LED maximums spoke brightness measuring device for camera that this patent is related to, makes full use of LED
Distribution curve flux generally be in symmetry characteristic, can significantly simplify LED blue light harms measure in maximum spoke brightness measurement system,
Realize and the rapid and convenient of LED maximum spoke brightness is measured.
The content of the invention
The purpose of this patent, it is to solve in LED blue light harms measure, " finds the side that LED produces maximum spoke brightness
To " and " being produced in LED at 500lx illumination, measured to LED spoke brightness " the two problems, there is provided one kind simplifies, be quick,
Easily LED maximums spoke brightness measuring device for camera.
To achieve the above object, this patent adopts the following technical scheme that：
1st, a kind of LED maximums spoke brightness measuring device for camera, its device include：Removable optical table module (1), it includes four
Individual submodule：Electric rotary table 1-1, motorized precision translation stage 1-2, the first stepper motor drive module 1-3, the second driving stepper motor
Module 1-4, brightness measurement module 2, illuminance feedback measurement module 3, control module 4.Described electric rotary table 1-1 and electronic flat
Moving stage 1-2 central axis are located on the same line；Detected LED is placed on electric rotary table 1, same with electric rotary table 1-1
Angle, synchronous axial system；The brightness measurement module 2 and illuminance feedback measurement module 3 are placed on motorized precision translation stage 1-2, and electronic
The same strokes of translation stage 1-2, synchronizing moving, and the camera lens front end of brightness measurement module 2 is in same with illuminance feedback measurement module 3
In one spatial vertical face, close to being arranged side by side, and it is perpendicular with detected radiation direction；Electric rotary table 1-1, which is carried, to be detected
LED is rotated in space according to certain angle interval, and the light that detected LED is sent at certain angle is by illuminance feedback measurement module
After 3 detect, control motorized precision translation stage 1-2 to be moved to according to illuminance feedback and produce at 500lx illumination, brightness measurement module 2 exists
The brightness for being detected LED is measured herein；The first described stepper motor drive module 1-3 controls the electric rotary table
1-1 rotation direction and angle, and be connected with electric power system；Described in described the second stepper motor drive module 1-4 controls
Motorized precision translation stage 1-2 moving direction and stroke, and be connected with electric power system；Described control module 4 gathers the illumination
The brightness value measured by measurement module 3 is fed back, to the first stepper motor drive module 1-3 and the second stepper motor drive module 1-
4 send control information, and are connected with electric power system.
2nd, described electric rotary table 1-1 minimum steps angle is 1 °, can continuously be turned clockwise or counterclockwise
It is dynamic.
3rd, described motorized precision translation stage 1-2 minimum stepper distances are 0.2mm, and range is no less than 200mm.
4th, described driving stepper motor module 1-3,1-4 uses stepper motor driver chip, operating voltage direct current 10V-
35V, output current are no more than 3A.
5th, described brightness measurement module 2 is using imaging spoke luminance meter, measurement wave-length coverage covering 300-700nm.
6th, described illuminance feedback measurement module 3 uses digital light intensity sensor, illumination photometry scope covering 0-
65535lx。
7th, described control module 4 uses single-chip microcomputer or FPGA.
The advantages of this patent, is：
1st, detected for spoke brightness in LED blue light harms, easy to operate, detection speed is fast；
2nd, used basic equipment is very common, without especially processing, makes the reduction of measurement apparatus totle drilling cost；
3rd, the measurement of other optical parametrics can be expanded using this measurement apparatus, such as light irradiation degree, brightness, illumination, color
The light measurements such as temperature, chromaticity coordinates, chromatic value, realize set of device multiple use.
Brief description of the drawings
Fig. 1 is the position relationship and information relationship figure between the major meters device of this patent.
Fig. 2 is the removable optical table module of this patent and its graph of a relation of submodule.
Fig. 3 is the graph of a relation between the electric power system of this patent and correlation module.
Fig. 4 be this patent described in electric rotary table and motorized precision translation stage between position signal and brightness measurement module and
Position view between illumination photometry module.
Fig. 5 is the position view between brightness measurement module and illumination photometry module described in this patent.
1 represents removable optical table module in figure, and 1-1 represents electric rotary table, and 1-2 represents motorized precision translation stage, 1-3 tables
Show the first stepper motor drive module, 1-4 represents the second stepper motor drive module, and 2 represent brightness measurement module, and 3 represent to shine
Degree feedback measurement module, 4 represent control module.
Embodiment
This patent is further described with reference to the accompanying drawings and detailed description, only uses the schematic of this patent herein
Embodiment and its explanation explain this patent, but are not intended as the restriction to this patent.
According to Fig. 1 and Fig. 2, LED maximum spokes brightness measuring device for camera related laboratory apparatus or equipment, including it is removable
Optical table module 1, brightness measurement module 2, illuminance feedback measurement module 3, control module 4, wherein removable optical table mould
Block includes electric rotary table 1-1, motorized precision translation stage 1-2, the first stepper motor drive module 1-3, the second driving stepper motor mould
Block 1-4.LED light source to be detected need to be placed on electric rotary table 1-1, and with its same angle, synchronous axial system；Brightness measurement mould
Block 2, illuminance feedback measurement module 3 need to be placed on motorized precision translation stage 1-2, and with its same stroke, synchronizing moving.Control module 4
It is connected by circuit with electric rotary table 1-1, motorized precision translation stage 1-2 and illuminance feedback measurement module 3, receives illuminance feedback and survey
The illuminance information measured by module 3 is measured, and controls electric rotary table 1-1, motorized precision translation stage 1-2 moving direction, angle or row
Journey.
According to Fig. 3, electric rotary table 1-1 need to be connected with the first stepper motor drive module 1-3, motorized precision translation stage
1-2 need to be connected with the second stepper motor drive module 1-4.Electric power system is respectively to the first stepper motor drive module 1-3,
Two stepping motor drive module 1-4 and control module 4 are powered.
According to Fig. 4, electric rotary table 1-1 and motorized precision translation stage 1-2 central axis are located on the same line, illumination
Feedback measurement module 3 and the camera lens front end of brightness measurement module 2 are in the same space vertical plane.
According to Fig. 5, the camera lens of illuminance feedback measurement module 3 and brightness measurement module 2 should be close to being arranged side by side, and should
It is perpendicular with detected radiation direction.
Below by taking a kind of typical resource supportability and application scenarios as an example, LED maximum spoke brightness measuring device for camera is made a concrete analysis of
Application method.
In a kind of typical application scenarios, the device in optical table module 1 is may move, electric rotary table 1-1 is used
ZT201ER100 electric rotary tables, motorized precision translation stage 1-2 use CBX1204-100 motorized precision translation stages, the first driving stepper motor
Module 1-3, the second stepper motor drive module 1-4 use TB6560 driving stepper motor plates.Brightness measurement module 2 uses Ke
Buddhist nun's card Minolta LS150 hand-held luminance meters, the brightness value of measurement can be directly read.Illuminance feedback measurement module 3 is using numeral
Light intensity sensor BH1750FVI luminance detection modules.Control module 4 uses AT89051 microcomputer development sleeve-board parts, for controlling
The movement of the removable optical table module of system, read and show the brightness value of illumination module detection.
Usual LED lights in 2 π spaces, therefore, also only needs to survey LED maximum spoke brightness in this 2 π space
Amount.
Its measurement process is divided into two kinds of primary pattern and accurate model.
Primary measurement pattern step is as follows：
1st, 0 ° of angle in 2 π spaces where LED light-emitting areas is overlapped with translation stage, turntable center line.
2nd, now, light illumination is detected with illumination photometer, such as illumination<490lx, then translation stage is to close to turntable side
To mobile 20mm, such as illumination>510lx, then translation stage is to remote turntable direction movement 20mm, until surveyed illumination is in
In the range of 490lx-510lx, translation stage no longer shift position, and record the light-source brightness value that now luminance meter detects.
3rd, 2 π direction in spaces residing for LED to light-emitting area are rotated into 10 °, and repeat step 2, until completing the survey in 2 π spaces
Amount.
The brightness value every 10 ° in 2 π spaces is now have recorded.
Accurate measurement pattern step is as follows：
1st, it is 10 ° of angular interval lower limit centered on angle where the brightness peak measured in primary measurement pattern is corresponding
Angle, overlapped with translation stage, turntable center line.
2nd, now, light illumination is detected with illumination photometer, such as illumination<500lx, then translation stage is to close to turntable side
To mobile 2mm, such as illumination>500lx, then translation stage to away from turntable direction movement 2mm, when surveyed illumination is 500lx,
Translation stage no longer shift position, and record the light-source brightness value that now luminance meter detects.
3rd, in 10 ° of angular interval centered on angle where the brightness peak for measuring LED into primary measurement pattern
Limit direction rotates 1 °, and repeat step 2, until completing the measurement in this 10 ° of angular intervals.
If the 4, measuring multiple brightness peaks in preliminary surveying pattern, each brightness peak repeat step 1-3 is corresponded to, than
Compared with the maximum of brightness in measurement result, as LED luminance maximum.
After measurement obtains LED luminance maximum, further according to vision Efficiency Function, LED spoke brightness maximas are calculated.
It is described above, the only preferable embodiment of this patent, but the protection domain of this patent is not limited thereto,
Any one skilled in the art is in the technical scope that this patent discloses, the system and in fact according to this patent
The equal change and modification that applying method is done, should all cover within the protection domain of this patent.Therefore, the protection model of this patent
Enclose is defined by scope of the claims.
Claims (7)
1. a kind of LED maximums spoke brightness measuring device for camera, including include electric rotary table (1-1), motorized precision translation stage (1-2),
The removable optical table module (1) of one driving stepper motor module (1-3) and the second stepper motor drive module (1-4) is bright
Spend measurement module (2), illuminance feedback measurement module (3), control module (4), it is characterised in that：
Described electric rotary table (1-1) and motorized precision translation stage (1-2) central axis is located on the same line；It is detected LED
It is placed on electric rotary table (1-1), angle same with electric rotary table (1-1), synchronous axial system；The brightness measurement module (2) and
Illuminance feedback measurement module (3) is placed on motorized precision translation stage (1-2), stroke same with motorized precision translation stage (1-2), synchronizing moving, and
The camera lens front end of brightness measurement module (2) is in the same space vertical plane with illuminance feedback measurement module (3), close to side by side
Arrangement, and it is perpendicular with detected radiation direction；Electric rotary table (1-1), which carries, is detected LED in space according to certain angle
Degree interval rotates, and is detected at certain angle after the light that LED is sent detected by illuminance feedback measurement module (3), according to illumination
Feedback control motorized precision translation stage (1-2), which is moved to, to be produced at 500lx illumination, and brightness measurement module (2) is here to being detected LED
Brightness measure；The first described stepper motor drive module (1-3) controls the rotation side of the electric rotary table (1-1)
To and angle, and be connected with electric power system；The second described stepper motor drive module (1-4) controls the motorized precision translation stage
The moving direction and stroke of (1-2), and be connected with electric power system；Described control module (4) gathers the illuminance feedback and surveyed
The brightness value measured by module (3) is measured, to the first stepper motor drive module (1-3) and the second stepper motor drive module (1-
4) control information is sent, and is connected with electric power system.
A kind of 2. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：Described electronic rotation
Platform (1-1) minimum step angle is 1 °, can continuously be rotated clockwise or counterclockwise.
A kind of 3. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：Described electric translation
Platform (1-2) minimum stepper distances are 0.2mm, and range is no less than 200mm.
A kind of 4. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：The first described stepping
Motor drive module (1-3) and the second stepper motor drive module (1-4) use stepper motor driver chip, operating voltage direct current
10V-35V, output current are no more than 3A.
A kind of 5. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：Described brightness measurement
Module (2) is using imaging spoke luminance meter, measurement wave-length coverage covering 300-700nm.
A kind of 6. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：Described illuminance feedback
Measurement module (3) uses digital light intensity sensor, illumination photometry scope covering 0-65535lx.
A kind of 7. LED maximums spoke brightness measuring device for camera according to claim 1, it is characterised in that：Described control module
(4) single-chip microcomputer or FPGA are used.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017200614356 | 2017-01-19 | ||
| CN201720061435 | 2017-01-19 |
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| CN206804279U true CN206804279U (en) | 2017-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710388083.XA Active CN107132031B (en) | 2017-01-19 | 2017-05-27 | LED maximum radiance measuring device |
| CN201720603948.5U Withdrawn - After Issue CN206804279U (en) | 2017-01-19 | 2017-05-27 | LED maximum spoke brightness measuring device for camera |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710388083.XA Active CN107132031B (en) | 2017-01-19 | 2017-05-27 | LED maximum radiance measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132031A (en) * | 2017-01-19 | 2017-09-05 | 中国科学院上海技术物理研究所 | A kind of maximum spoke brightness measuring device for camera of LED |
| CN109459212A (en) * | 2018-11-07 | 2019-03-12 | 常州工学院 | A kind of LED life appraisal procedure based on blue light harm |
| CN112187992A (en) * | 2020-09-28 | 2021-01-05 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Method for testing blue light of mobile phone |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195569B (en) * | 2017-12-08 | 2020-08-18 | 杭州浙大三色仪器有限公司 | Headlamp illuminance detection method |
| CN110095261B (en) * | 2019-04-01 | 2021-08-20 | 南京巨鲨显示科技有限公司 | Blue light detection device and method for medical display |
| CN111504611B (en) * | 2020-04-24 | 2022-04-19 | 嘉兴市加宇电器科技有限公司 | LED illuminating lamp brightness detection device and use method thereof |
| WO2022109831A1 (en) * | 2020-11-25 | 2022-06-02 | 苏州康孚智能科技有限公司 | Brightness detection device for noctilucent textile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4497890B2 (en) * | 2003-10-30 | 2010-07-07 | キヤノン株式会社 | Projection type image display device |
| CN101340510B (en) * | 2008-08-07 | 2010-06-23 | 中兴通讯股份有限公司 | Method for video enhancement and apparatus thereof |
| CN101915612B (en) * | 2010-08-05 | 2012-07-04 | 中国兵器工业第二〇五研究所 | Ultraviolet radiation comprehensive test device |
| CN102213615B (en) * | 2011-04-01 | 2013-05-08 | 中国兵器工业第二〇五研究所 | LED optical parameter comprehensive testing device |
| JP6083172B2 (en) * | 2011-12-26 | 2017-02-22 | セイコーエプソン株式会社 | Lighting device |
| CN202938985U (en) * | 2012-11-19 | 2013-05-15 | 天津理工大学 | Strip-shaped light source illuminance distribution detecting device based on linear array CCD camera |
| CN103471821B (en) * | 2013-09-30 | 2019-03-05 | 广东产品质量监督检验研究院 | LED desk lamp uniformity of illuminance and spectral characteristic detection and analytical equipment and method |
| CN103954436B (en) * | 2014-05-09 | 2016-03-30 | 安庆师范学院 | High precision spectral radiometric calibration device |
| CN105841930B (en) * | 2016-05-18 | 2019-12-13 | 东莞市保绿仪器设备有限公司 | Optical biological safety test system |
| CN107132031B (en) * | 2017-01-19 | 2023-05-05 | 中国科学院上海技术物理研究所 | LED maximum radiance measuring device |
-
2017
- 2017-05-27 CN CN201710388083.XA patent/CN107132031B/en active Active
- 2017-05-27 CN CN201720603948.5U patent/CN206804279U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132031A (en) * | 2017-01-19 | 2017-09-05 | 中国科学院上海技术物理研究所 | A kind of maximum spoke brightness measuring device for camera of LED |
| CN107132031B (en) * | 2017-01-19 | 2023-05-05 | 中国科学院上海技术物理研究所 | LED maximum radiance measuring device |
| CN109459212A (en) * | 2018-11-07 | 2019-03-12 | 常州工学院 | A kind of LED life appraisal procedure based on blue light harm |
| CN112187992A (en) * | 2020-09-28 | 2021-01-05 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Method for testing blue light of mobile phone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107132031A (en) | 2017-09-05 |
| CN107132031B (en) | 2023-05-05 |
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Granted publication date: 20171226 Effective date of abandoning: 20230505 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171226 Effective date of abandoning: 20230505 |