CN105158668A - LED light source discoloration failure detection method and device - Google Patents
LED light source discoloration failure detection method and device Download PDFInfo
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- CN105158668A CN105158668A CN201510532033.5A CN201510532033A CN105158668A CN 105158668 A CN105158668 A CN 105158668A CN 201510532033 A CN201510532033 A CN 201510532033A CN 105158668 A CN105158668 A CN 105158668A
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Abstract
The invention discloses an LED light source discoloration failure detection method and device. The method comprises the steps that a discoloration area of an LED light source is acquired; existence of discoloration spots in the discoloration area is detected; if the discoloration spots exist in the discoloration area, the discoloration spots of the discoloration area are extracted; the spot elements of the discoloration spots are analyzed by adopting an X-ray energy dispersive spectrometer; and the result components of the spot elements are outputted based on the X-ray energy dispersive spectrometer. With application of the LED light source discoloration failure detection method and device, discoloration failure of the LED lamp light source can be rapidly detected, existence of the discoloration spots in the discoloration area is detected firstly, and the analysis result is obtained by analysis of the discoloration spot elements so that an objective of rapidly parsing LED light source discoloration failure causes and results can be achieved.
Description
Technical field
The present invention relates to semiconductor light-emitting-diode (LED) technical field, be specifically related to a kind of method and the device that detect LED light source variable color inefficacy.
Background technology
LED (LightEmittingDiode) is a kind of solid-state semiconductor device, can convert electrical energy into luminous energy.Have that power consumption is little, spotlight effect good, reaction velocity is fast, controllability is strong, can bear the advantages such as high impact forces, long service life, environmental protection.LED just progressively substitutes conventional light source, becomes forth generation light source.
For LED light source, package support or the reliability effect of substrate to light source larger.General, support manufacturer can arrange coating at support or functional substrate district.The functions such as coating, can increase the strength of joint of chip and support, reduces light loss, increases emitting brightness, anticorrosive.Current, the coating in the support that most LED light sources adopts or functional substrate district is all silver or silver-nickel.
Along with the widespread use of LED support coating, the variable color Problem of Failure of LED light source also highlights.The sulfuration of coating, chlorination and bromination problem are just stood in the breach.So-called sulfuration is that the silver inside support or substrate coating reacts with the sulphur touched and forms the process of silver sulfide, and in like manner, chlorination is exactly that silver has been reacted into silver chloride, and bromination is exactly that silver has been reacted into silver bromide.The coating of argentiferous is the topmost factor that sulfuration, chlorination or bromination occur.The variable color of light source functional areas was lost efficacy, and reflectivity step-down causes luminous flux to decline, and makes the luminescence efficiency step-down of LED light source, occurs color temperature shift simultaneously.After the silver layer of functional areas becomes silver compound, the contact force of gold goal and functional areas declines, and easily dead lamp, reduces reliability and the serviceable life of product, even directly the dead lamp of appearance.
But, the reason that LED light source generation variable color was lost efficacy is more, in numerous variable colors was lost efficacy, also effectively cannot lose efficacy to LED light source at present and launch analyzing and positioning accurately, cannot judge that LED light source variable color was lost efficacy is that sulfuration, chlorination or bromination variable color were lost efficacy, and cannot provide a result and export.
Summary of the invention
The present invention is directed to existing in cannot express-analysis go out LED light source variable color lost efficacy and provide a kind of detect LED light source variable color lost efficacy method and device, can realize fast to LED light source lost efficacy positioning analysis.
The invention provides a kind of method detecting LED light source variable color and lost efficacy, comprise the steps:
Obtain the color change interval of LED light source;
Detect described color change interval and whether there is discoloured spots;
If described color change interval exists discoloured spots, then extract the variable color color spot of color change interval;
The spot element of X-ray energy spectrometer to variable color color spot is adopted to analyze;
The result composition in spot element is exported based on X-ray energy spectrometer.
The color change interval of described acquisition LED light source comprises:
Obtain the color change interval in light source bracket or functional substrate district.
Also comprise before the color change interval of described acquisition LED light source:
Remove the packaging plastic of LED light source.
Whether the described color change interval of described detection exists discoloured spots comprises:
The image of the described color change interval after amplifying is obtained based on high-power microscope;
Image based on the described color change interval of described amplification judges whether described color change interval exists discoloured spots.
The display multiple of described high-power microscope is more than 50 times.
Present invention also offers a kind of device detecting LED light source variable color and lost efficacy, described device comprises:
Acquisition module, for obtaining the color change interval of LED light source;
Whether detection module, exist discoloured spots for detecting described color change interval;
Color spot extraction module, for when detecting described color change interval and there is discoloured spots, extracts the variable color color spot of color change interval;
Color spot analysis module, analyzes for adopting the spot element of X-ray energy spectrometer to variable color color spot;
Analysis result module, for exporting the result composition in spot element based on X-ray energy spectrometer.
Described acquisition module is for obtaining the color change interval in light source bracket or functional substrate district.
Described device also comprises:
Go packaging plastic module, for removing the packaging plastic of LED light source.
Described detection module also comprises:
High power display unit, for obtaining the image of the described color change interval after amplifying based on high-power microscope;
Detecting unit, the image for the described color change interval based on described amplification judges whether described color change interval exists discoloured spots.
The display multiple of the high power display device in described high power display unit is more than 50 times.
By implementing the present invention, LED light source can be detected fast and whether there occurs variable color inefficacy, first whether there is variable color color spot by detecting color change interval, again by analyzing the element of variable color color spot, draw analysis result, reach the object of fast resolving LED light source variable color failure cause and result.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow diagram that the detection LED light source variable color in the embodiment of the present invention was lost efficacy;
Fig. 2 is the apparatus structure schematic diagram that the detection LED light source variable color in the embodiment of the present invention was lost efficacy;
Fig. 3 is the structural representation of the detection module in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
The method that detection LED light source variable color in the embodiment of the present invention was lost efficacy, first obtains the color change interval of LED light source; Detect described color change interval and whether there is discoloured spots; If described color change interval exists discoloured spots, then extract the variable color color spot of color change interval; The spot element of X-ray energy spectrometer to variable color color spot is adopted to analyze; The result composition in spot element is exported based on X-ray energy spectrometer.
Fig. 1 shows the method flow diagram that the detection LED light source variable color in the embodiment of the present invention was lost efficacy, and comprises the steps:
The packaging plastic of S101, removal LED light source;
Because LED light source is encapsulated by packaging plastic, it is in testing process, needs to go packaging plastic process to LED light source discoloration member, then is placed on surveyed area by LED light source.
The color change interval of S102, acquisition LED light source;
General, the color change interval in this acquisition light source bracket or functional substrate district.
In whole LED light source variable color was lost efficacy and made a definite diagnosis, needed to relate to discoloured spots and element is determined, wherein: light source bracket or the variable color of functional substrate district were lost efficacy and formed discoloured spots; Element confirms the halogen that very easily must react with silver containing sulphur, chlorine or bromine etc.
S103, obtain the image of described color change interval after amplifying based on high-power microscope;
Because the discoloured spots in LED light source is more small, it needs the amplification realizing image by means of traditional high-power microscope, is convenient to detect judge, thus realizes precise positioning.It should be noted that, this high-power microscope can be 50 times of amplifications, or 60 times of amplifications, or 100 times are amplified etc., and it is satisfied with the enlarged image of more than 50 times, the easier determination to discoloured spots.
S104, judge whether described color change interval exists discoloured spots based on the image of the described color change interval of described amplification;
By judging enlarged image, can judge whether this color change interval exists discoloured spots, if there is discoloured spots, entering into S105, otherwise process ends.
The variable color color spot of S105, extraction color change interval;
S106, the spot element of employing X-ray energy spectrometer to variable color color spot are analyzed;
S107, export the result composition in spot element based on X-ray energy spectrometer.
The variable color failure morphology of whole LED light source is mottled, and this discoloured spots is silver compound crystal.Silver coating is contained in general support or functional substrate district.The variable color reacted at variable color silver and other halogens lost efficacy for silver coating was lost efficacy, was specially sulphide discoloration inefficacy, chlorination variable color inefficacy or bromination variable color inefficacy.This sulphide discoloration lost efficacy and makes cradling function district become black.This chlorination variable color was lost efficacy and is made cradling function district become white.It is light yellow that this bromination variable color inefficacy makes cradling function district become.When this variable color was lost efficacy and occurred, cradling function zone had discoloured spots.
What the result composition in whole spot element can obtain result based on X-ray energy spectrometer is that sulphide discoloration lost efficacy, chlorination variable color inefficacy or bromination variable color were lost efficacy etc., and it is the halogen very easily reacted with silver containing sulphur, chlorine or bromine etc. that this instrument can analyze concrete element.
Accordingly, Fig. 2 shows the apparatus structure schematic diagram that the detection LED light source variable color in the embodiment of the present invention was lost efficacy, and this device comprises: acquisition module, for obtaining the color change interval of LED light source;
Whether detection module, exist discoloured spots for detecting described color change interval;
Color spot extraction module, for when detecting described color change interval and there is discoloured spots, extracts the variable color color spot of color change interval;
Color spot analysis module, analyzes for adopting the spot element of X-ray energy spectrometer to variable color color spot;
Analysis result module, for exporting the result composition in spot element based on X-ray energy spectrometer.
Described acquisition module is for obtaining the color change interval in light source bracket or functional substrate district.In whole LED light source variable color was lost efficacy and made a definite diagnosis, needed to relate to discoloured spots and element is determined, wherein: light source bracket or the variable color of functional substrate district were lost efficacy and formed discoloured spots; Element confirms the halogen that very easily must react with silver containing sulphur, chlorine or bromine etc.
It should be noted that, this device also comprises: go packaging plastic module, for removing the packaging plastic of LED light source.
It should be noted that, Fig. 3 shows the structural representation of the detection module in the embodiment of the present invention, and this detection module also comprises:
High power display unit, for obtaining the image of the described color change interval after amplifying based on high-power microscope;
Detecting unit, the image for the described color change interval based on described amplification judges whether described color change interval exists discoloured spots.
It should be noted that, the display multiple of the high power display device in this high power display unit is more than 50 times.
Because the discoloured spots in LED light source is more small, it needs the amplification realizing image by means of traditional high-power microscope, is convenient to detect judge, thus realizes precise positioning.It should be noted that, this high-power microscope can be 50 times of amplifications, or 60 times of amplifications, or 100 times are amplified etc., and it is satisfied with the enlarged image of more than 50 times, the easier determination to discoloured spots.The variable color failure morphology of whole LED light source is mottled, and this discoloured spots is silver compound crystal.Silver coating is contained in general support or functional substrate district.The variable color reacted at variable color silver and other halogens lost efficacy for silver coating was lost efficacy, was specially sulphide discoloration inefficacy, chlorination variable color inefficacy or bromination variable color inefficacy.This sulphide discoloration lost efficacy and makes cradling function district become black.This chlorination variable color was lost efficacy and is made cradling function district become white.It is light yellow that this bromination variable color inefficacy makes cradling function district become.When this variable color was lost efficacy and occurred, cradling function zone had discoloured spots.
What the result composition in whole spot element can obtain result based on X-ray energy spectrometer is that sulphide discoloration lost efficacy, chlorination variable color inefficacy or bromination variable color were lost efficacy etc., and it is the halogen very easily reacted with silver containing sulphur, chlorine or bromine etc. that this instrument can analyze concrete element.
To sum up, the embodiment of the present invention can detect LED light source fast and whether there occurs variable color and lost efficacy, and first whether there is variable color color spot, by analyzing the element of variable color color spot by detecting color change interval, draw analysis result, reach the cause and effect that the variable color of fast resolving LED light source was lost efficacy.
The method that the detection LED light source variable color provided the embodiment of the present invention was above lost efficacy and device are described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. detect the method that LED light source variable color was lost efficacy, it is characterized in that, comprise the steps:
Obtain the color change interval of LED light source;
Detect described color change interval and whether there is discoloured spots;
If described color change interval exists discoloured spots, then extract the variable color color spot of color change interval;
The spot element of X-ray energy spectrometer to variable color color spot is adopted to analyze;
The result composition in spot element is exported based on X-ray energy spectrometer.
2. the method detecting LED light source variable color and lost efficacy as claimed in claim 1, it is characterized in that, the color change interval of described acquisition LED light source comprises:
Obtain the color change interval in light source bracket or functional substrate district.
3. the method detecting LED light source variable color and lost efficacy as claimed in claim 2, is characterized in that, also comprise before the color change interval of described acquisition LED light line:
Remove the packaging plastic of LED light source.
4. the method detecting LED light source variable color and lost efficacy as claimed in claim 1, it is characterized in that, whether the described color change interval of described detection exists discoloured spots comprises:
The image of the described color change interval after amplifying is obtained based on high-power microscope;
Image based on the described color change interval of described amplification judges whether described color change interval exists discoloured spots.
5. the method detecting LED light source variable color and lost efficacy as claimed in claim 4, it is characterized in that, the display multiple of described high-power microscope is more than 50 times.
6. detect the device that LED light source variable color was lost efficacy, it is characterized in that, described device comprises:
Acquisition module, for obtaining the color change interval of LED light source;
Whether detection module, exist discoloured spots for detecting described color change interval;
Color spot extraction module, for when detecting described color change interval and there is discoloured spots, extracts the variable color color spot of color change interval;
Color spot analysis module, analyzes for adopting the spot element of X-ray energy spectrometer to variable color color spot;
Analysis result module, for exporting the result composition in spot element based on X-ray energy spectrometer.
7. the device detecting LED light source variable color and lost efficacy as claimed in claim 6, it is characterized in that, described acquisition module is for obtaining the color change interval in light source bracket or functional substrate district.
8. the device detecting LED light source variable color and lost efficacy as claimed in claim 7, it is characterized in that, described device also comprises:
Go packaging plastic module, for removing the packaging plastic of LED light source.
9. the device detecting LED light source variable color and lost efficacy as claimed in claim 6, it is characterized in that, described detection module also comprises:
High power display unit, for obtaining the image of the described color change interval after amplifying based on high-power microscope;
Detecting unit, the image for the described color change interval based on described amplification judges whether described color change interval exists discoloured spots.
10. the device detecting LED light source variable color and lost efficacy as claimed in claim 9, it is characterized in that, the display multiple of the high power display device in described high power display unit is more than 50 times.
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| CN201510532033.5A CN105158668A (en) | 2015-08-25 | 2015-08-25 | LED light source discoloration failure detection method and device |
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| CN201510532033.5A CN105158668A (en) | 2015-08-25 | 2015-08-25 | LED light source discoloration failure detection method and device |
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Application publication date: 20151216 |