CN102708770A - System and method for detecting defect of flat panel display - Google Patents
System and method for detecting defect of flat panel display Download PDFInfo
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- CN102708770A CN102708770A CN2011100751717A CN201110075171A CN102708770A CN 102708770 A CN102708770 A CN 102708770A CN 2011100751717 A CN2011100751717 A CN 2011100751717A CN 201110075171 A CN201110075171 A CN 201110075171A CN 102708770 A CN102708770 A CN 102708770A
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Abstract
The invention discloses a detection system and a detection method which are used for detecting a defect of a flat panel display. The method comprises the following steps of: powering the flat panel display to be detected, and performing operation; then measuring surface temperature of the flat panel display to be detected, and obtaining a surface temperature distribution map of the flat panel display to be detected; observing whether a bright point or a bright line which indicates abnormal temperature exists in the surface temperature distribution map, and judging whether a defect exists, wherein a region with the bright point or the bright line is a region with the defect; and finally directly scanning the region with the defect by an optical checking device to obtain an optical image, and obtaining the type and the position of the defect. By the detection system and the detection method, the time for detecting the flat panel display can be shortened, and the defect of the flat panel display can be definitely known; and the defect can be recovered conveniently.
Description
Technical field
The present invention relates to a kind of detection system and method, particularly be directed against the system and method for flat-panel screens defects detection.
Background technology
In recent years, the various application of flat-panel screens and consumer's daily life are closely bound up, and therefore, the development of flat-panel screens has unlimited potentiality, and has become the industry that attract people's attention this century most.
The flat-panel screens related industry comprises LCD (LCD), Electronic Paper, organic luminous semiconductor display (OLED display) etc.The advantages such as man-machine communication media that its relevant application has had slimming, power saving, province's energy, lightweight, image quality lifting, visual effect is better and more meet the New Times life requirement.
Yet needing before each flat-panel screens shipment proves to have no defective through detecting, and just can be sold to the market.The existing mode that flat-panel screens is detected comprises, detects with automatic optical detecting system scanning, and the operating personnel operates microscopic examination, or to the display energising, whether inspection has is opened circuit, short circuit or other defect.
Yet, along with the screen size of display increases, utilize automatic optical detection device, cooperate image capture with line sweep (linescan), detect one or two defective that is present in the display, quite time-consuming.Often expend one day time, can only detect one or two workpiece.And if operate microscopic examination by the operating personnel, not only be difficult for searching problem, also need the labor intensive cost.
In addition,,, can't learn the problem place,, can only display be cancelled as long as testing result does not meet standard though directly detect electrically saving time of display to the flat-panel screens power supply.But this does not quite meet economic benefit for making the high flat-panel screens of unit price.
Therefore; Be necessary to provide a kind of method and device of detection plane display; Except solving in the existing detection technique, outside the problem of cost a lot of money detection time and human cost, can find the problem rapidly and accurately again simultaneously; Increase the possibility of further repairing, produce to reduce waste product.
Summary of the invention
Because above-mentioned problem, the present invention provides a kind of flat-panel screens defect detecting system, can detect the defective position at short notice.The flat-panel screens defect detecting system comprises: a power supply unit, so that flat-panel screens is supplied power; One infrared temperature sensing device with after the flat-panel screens energising, measures the surface temperature of flat-panel screens, and exports a surface temperature distribution figure, observes bright spot or bright line that whether surface temperature distribution figure has temperature anomaly, judges whether that defectiveness exists; And an optical detection apparatus, when observing bright spot or bright line, this bright spot or bright line region are carried out the scanning of thin portion, and export an optical image, further to confirm defect type and position.
Flat-panel screens defect detecting system of the present invention comprises a control device, has a Treatment Analysis module, receives and analytical table surface temperature image, converts bright spot or bright line region into coordinate data, offers control device.
Another purpose of the present invention provides a kind of flat-panel screens defect inspection method, comprising: a flat-panel screens to be measured is provided; The lining face of treating monitor power supply is to operate; Measure the surface temperature of flat-panel screens to be measured, and obtain surface temperature distribution figure; Through observing surface temperature distribution figure whether the bright spot or the bright line of temperature anomaly is arranged, whether defectiveness exists to differentiate, and wherein, the zone at bright spot or bright line place is the zone that defective exists; Reach with an optical detection device zone at bright spot or bright line place is scanned, further to learn defect type and position.
Detection system of the present invention and method not only can shorten detection time of flat-panel screens, can definitely learn the problem points of flat-panel screens again, help further repair-deficiency.About advantage of the present invention and spirit, can graphicly further be understood through following invention explanation and appended, yet appended graphic only for reference and explanation are non-so that the present invention is limited.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute qualification of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram of the method for detection plane display defective of the present invention; And
Fig. 2 is the vertical view of flat-panel screens defect detecting system of the present invention.
Drawing reference numeral:
S100, S105, S110, S115, S116, S117, S118, S120, S121: detect step
2: the flat-panel screens defect detecting system
20: checkout equipment 21: control device
210: Treatment Analysis module 200: power supply unit
2100: database 2010: infrared ray electric charge coupling diode
201: infrared temperature sensing device 2020: the visible light charge-coupled diode
202: optical detection apparatus 204: the control rail
203: 206: the one Y axles of slip rail driving element
207: the two Y axles of 205:X axle driving element driving element
3: flat-panel screens
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, hereinafter is according to flat-panel screens detection system provided by the present invention and method, specially lifts preferred embodiment, and cooperates appended correlative type, elaborates as follows.
Please with reference to Fig. 1, be the process flow diagram of the method for detection plane display defective provided by the present invention.One flat-panel screens to be measured at first is provided, like S100.Detection method of the present invention goes for the flat-panel screens of various sizes and kind on the market, such as: LCD, Electronic Paper, organic light emitting diode display, plasma display panel or the like.But, surpass 80 o'clock flat-panel screens to the screen size, more can highlight the advantage of detection method of the present invention.
Then, treat lining face monitor power supply to operate, like S105.And after flat-panel screens power supply to be measured, measure the surface temperature of flat-panel screens to be measured, to obtain the surface temperature distribution figure of flat-panel screens, like S110.Via observing or analytical table surface temperature distribution plan, whether the bright spot or the bright line of temperature anomaly is arranged, can judge whether that defectiveness exists, like S115.
Wherein, during the surface temperature of measurement plane display, can select contact or contactless measuring method.In embodiments of the present invention, flat-panel screens is detected, and, show with a GTG or colored surface temperature image with the distribution of flat-panel screens surface temperature with the infrared temperature method for sensing.
Open circuit when existing in the flat-panel screens, during defective such as short circuit or too high in resistance, the temperature of defect point can be higher than other zones, so, can on surface temperature distribution figure, form bright spot; In addition and the pixel of same row of defect point or row, because shared same electrode, its temperature can receive the defect point influence too, and on surface temperature distribution figure, forms bright line.That is to say that bright spot or bright line whereabouts are defective and have part.If no bright spot or bright line exist, promptly represent flat-panel screens zero defect to be measured, like S121.
Though can confirm the existing zone of defective immediately,, in the time of further confirming defect type and position, also need utilize an optical detection apparatus.Be noted that this moment, optical detection apparatus needed only the zone that the scanning defective exists, like S120.Owing to do not need again to expend and to scan whole flat-panel screens for a long time, confirm the position of defective, so quite save time as prior art.
In an embodiment of the present invention, except Direct observation surface temperature distribution figure, if will make the testing process robotization, average surface temperature that can a standard flat display is as a reference value, like S116; Then, calculate the surface temperature of each pixel of flat-panel screens to be measured and the temperature gap between the reference value, with the position of judging that defective exists, like S117.Indicate the pixel position of temperature gap, and convert coordinate data output to, move to this place, scan, like S118 and S120 so that optical detection apparatus to be provided greater than a predetermined value.
Fig. 2 is the vertical view according to the flat-panel screens defect detecting system of the present invention's one preferred embodiment.Flat-panel screens defect detecting system 2 comprises a checkout equipment 20 and a control device 21 at least.
Infrared temperature sensing device 201 is equipped with an infrared ray electric charge coupling diode 2010 (CCD), is used for measuring the surface temperature after flat-panel screens 3 is switched on, and flat-panel screens 3 surface temperature distribution figure are exported.In embodiments of the present invention, use mid and far infrared line temperature-sensitive sticker, employed infrared wavelength range about 800 is to 1060nm.
In a preferred embodiment; Control device 21 of the present invention more comprises a Treatment Analysis module 210; Be used for the surface temperature of each pixel of gauging surface temperature profile and the temperature gap between the reference value, have the zone to learn defective, and convert coordinate data into.In embodiments of the present invention, described reference value is meant the average surface temperature of standard flat display.So in the present embodiment, Treatment Analysis module 210 more comprises a database 2100, to store the average surface temperature of different size and kind flat-panel screens.
Please refer again to Fig. 2, the checkout equipment 20 of the embodiment of the invention more comprises two slip rails 203, a control rail 204, an X axle driving element 205, a Y axle driving element 206 and one the 2nd Y axle driving element 207.
Wherein, control rail 204 two ends are set up between the two slip rails 203 that are parallel to each other, and vertical with two slip rails 203.Infrared temperature sensing device 201 and optical detection apparatus 202 are arranged at control both sides, rail 204 front and back respectively.
X axle driving element 205 moves in the horizontal direction in order to drive controlling rail 204, adjusts the X axial coordinate of infrared temperature sensing device 201 and optical detection apparatus 202 by this.206,207 of first and second Y axle driving elements drive infrared temperature sensing device 201 respectively, and optical detection apparatus 202 is axial along control rail 204, and just Y direction moves.
In sum, flat-panel screens detection system of the present invention and method can determine whether at short notice that defectiveness exists.Past only with optical detection apparatus to a display pannel, particularly search defective or when detecting, maybe even will expend one day time for large-sized panel.The present invention cooperates optical detection apparatus to detect with infrared temperature sensing device, only needs tens of times in second of cost, just can accomplish a flat-panel screens and detect, and compared to existing technologies, has significantly saved detection time.
In addition, the method that detection method of the present invention detects compared to available technology adopting energising not only detects rapidly, can further find the problem simultaneously, repairs judging whether.For the product of high unit price, the chance that detection mode of the present invention can be reduced the number of rejects and seconds and produced.
Though the present invention illustrates as above with preferred embodiments, so it is not only to terminate in the foregoing description in order to limit the present invention's spirit with the invention entity.All those skilled in the art are when understanding and utilize other element or mode to produce identical effect easily.Be with, the modification of in not breaking away from spirit of the present invention and category, being done all should be included in the claim scope.
Claims (10)
1. the method for a detection plane display defective is characterized in that, comprising:
One flat-panel screens to be measured is provided;
Said flat-panel screens to be measured is supplied power to operate; And
Measure the surface temperature of said flat-panel screens to be measured, and obtain the surface temperature distribution figure of said flat-panel screens to be measured; And
Whether have bright spot or the bright line of temperature anomaly, whether defectiveness exists to differentiate if observing said surface temperature distribution figure, wherein, the zone at said bright spot or bright line place is the zone that said defective exists.
2. the method for detection plane display defective as claimed in claim 1; It is characterized in that; When measuring the surface temperature of said flat-panel screens to be measured; Be to utilize an infrared temperature method for sensing that said flat-panel screens to be measured is detected, wherein, the about 800nm to 1060nm of employed infrared wavelength range.
3. the method for detection plane display defective as claimed in claim 1; It is characterized in that, when defining defective and exist, more comprise with an optical detection device zone that said defective exists is scanned; To obtain an optical image, further learn said defect type and position.
4. the method for detection plane display defective as claimed in claim 3 is characterized in that, observes said surface temperature distribution figure, and when defining regional that said defective exists, more comprises the following steps:
A preset reference value;
Calculate the surface temperature of said each pixel of flat-panel screens to be measured, and the temperature gap between the said reference value;
Indicate said temperature gap and be higher than the pixel of a predetermined value, and convert said pixel position to coordinate data, said optical detection device is scanned said pixel.
5. the method for detection plane display defective as claimed in claim 4 is characterized in that said reference value is selected the average surface temperature of a standard flat display.
6. a flat-panel screens detection system in order to a flat-panel screens is carried out defects detection, is characterized in that, comprising:
One power supply unit is to operate said flat-panel screens power supply;
One infrared temperature sensing device; Measuring the surface temperature of said flat-panel screens, and export a surface temperature distribution figure, whether the bright spot or the bright line of temperature anomaly is arranged through observing said surface temperature distribution figure; Whether defectiveness exists to differentiate; Wherein, the zone at said bright spot or bright line place is the zone that said defective exists; And
One optical detection apparatus when observing bright spot or bright line, carries out the scanning of thin portion to said bright spot or bright line region, and exports an optical image, further to learn said defect type and position.
7. flat-panel screens detection system as claimed in claim 6 is characterized in that, more comprises a control device, in order to control said infrared temperature sensing device and said optical detection apparatus detects.
8. flat-panel screens detection system as claimed in claim 7 is characterized in that, said control device comprises a Treatment Analysis module; Comprise a database, in order to store the average surface temperature of different size and kind flat-panel screens, as a reference value; Wherein, The surface temperature of said each pixel of surface temperature distribution figure of said Treatment Analysis module analysis and the temperature gap of said reference value learning said bright spot or bright line region, and convert coordinate data into.
9. flat-panel screens detection system as claimed in claim 6 is characterized in that, said infrared temperature sensing device comprises an infrared ray electric charge coupling diode, to export said surface temperature image.
10. flat-panel screens detection system as claimed in claim 6 is characterized in that, said optical detection apparatus comprises a visible light charge-coupled diode, to export said optical image.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100751717A CN102708770A (en) | 2011-03-28 | 2011-03-28 | System and method for detecting defect of flat panel display |
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| CN2011100751717A CN102708770A (en) | 2011-03-28 | 2011-03-28 | System and method for detecting defect of flat panel display |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103927954A (en) * | 2014-03-31 | 2014-07-16 | 京东方科技集团股份有限公司 | Method and system for testing OLED display device |
| CN103969567A (en) * | 2014-04-22 | 2014-08-06 | 四川虹视显示技术有限公司 | Method and device for detecting and analyzing defects of OLED device |
| CN105679219A (en) * | 2016-03-25 | 2016-06-15 | 深圳市华星光电技术有限公司 | AMOLED display panel detection method and detection device |
| TWI552126B (en) * | 2014-10-08 | 2016-10-01 | 友達光電股份有限公司 | Defect detecting method and display panel |
| CN106199365A (en) * | 2016-06-17 | 2016-12-07 | 深圳市华星光电技术有限公司 | The system of selection of OLED doping content and the detection method of OLED leakage point of electricity |
| CN107271044A (en) * | 2017-05-03 | 2017-10-20 | 北京海顿中科技术有限公司 | A kind of thermal imaging device for detecting temperature and method |
| CN107680523A (en) * | 2017-11-21 | 2018-02-09 | 深圳市华星光电技术有限公司 | The detection method of array base palte cross line defect |
| CN108469694A (en) * | 2018-02-07 | 2018-08-31 | 深圳市华星光电半导体显示技术有限公司 | A method of positioning TFT LCD display panels generate horizontal brightness bad position |
| CN113222897A (en) * | 2020-10-28 | 2021-08-06 | 友达光电股份有限公司 | Monitoring system and method thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015149493A1 (en) * | 2014-03-31 | 2015-10-08 | 京东方科技集团股份有限公司 | Test method and test system for oled display device |
| CN103927954A (en) * | 2014-03-31 | 2014-07-16 | 京东方科技集团股份有限公司 | Method and system for testing OLED display device |
| CN103969567A (en) * | 2014-04-22 | 2014-08-06 | 四川虹视显示技术有限公司 | Method and device for detecting and analyzing defects of OLED device |
| TWI552126B (en) * | 2014-10-08 | 2016-10-01 | 友達光電股份有限公司 | Defect detecting method and display panel |
| CN105679219B (en) * | 2016-03-25 | 2019-04-02 | 深圳市华星光电技术有限公司 | AMOLED display panel testing method and detection device |
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| CN106199365A (en) * | 2016-06-17 | 2016-12-07 | 深圳市华星光电技术有限公司 | The system of selection of OLED doping content and the detection method of OLED leakage point of electricity |
| CN107271044A (en) * | 2017-05-03 | 2017-10-20 | 北京海顿中科技术有限公司 | A kind of thermal imaging device for detecting temperature and method |
| CN107271044B (en) * | 2017-05-03 | 2020-10-23 | 北京海顿中科技术有限公司 | Thermal imaging temperature monitoring device and method |
| CN107680523A (en) * | 2017-11-21 | 2018-02-09 | 深圳市华星光电技术有限公司 | The detection method of array base palte cross line defect |
| CN108469694A (en) * | 2018-02-07 | 2018-08-31 | 深圳市华星光电半导体显示技术有限公司 | A method of positioning TFT LCD display panels generate horizontal brightness bad position |
| CN108469694B (en) * | 2018-02-07 | 2020-12-25 | 深圳市华星光电半导体显示技术有限公司 | Method for positioning poor position of horizontal bright line generated by TFT LCD display panel |
| CN113222897A (en) * | 2020-10-28 | 2021-08-06 | 友达光电股份有限公司 | Monitoring system and method thereof |
| TWI816060B (en) * | 2020-10-28 | 2023-09-21 | 友達光電股份有限公司 | Monitor system and method thereof |
| CN113222897B (en) * | 2020-10-28 | 2024-04-05 | 友达光电股份有限公司 | Monitoring system and method thereof |
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Application publication date: 20121003 |