CN101604075B - Lighting test electrostatic defending device of liquid crystal display panel and method - Google Patents
Lighting test electrostatic defending device of liquid crystal display panel and method Download PDFInfo
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- CN101604075B CN101604075B CN 200810110847 CN200810110847A CN101604075B CN 101604075 B CN101604075 B CN 101604075B CN 200810110847 CN200810110847 CN 200810110847 CN 200810110847 A CN200810110847 A CN 200810110847A CN 101604075 B CN101604075 B CN 101604075B
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Abstract
The invention provides a lighting test electrostatic defending device of a liquid crystal display panel and a method. The defending device comprises a three-terminal switch unit and an electrostatic excluding resistor. The electrostatic excluding resistor is electrically connected between a panel test point and a grounding terminal; and the three-terminal switch unit is linked with a power switch of a lighting system plate to be operated so as to ground the lighting system plate before the lighting system plate is started and grounds the panel test point through the electrostatic excluding resistor, thereby static electricity of the panel and the lighting system plate is excluded. When the lighting system plate is started, the three-terminal switch unit can establish electrical connection of the lighting system plate and the panel test point so as to be beneficial for test.
Description
Technical field
The invention relates to a kind of lighting test electrostatic defending device and method of display panels, espespecially a kind of lighting test electrostatic defending device and method of utilizing the display panels of three terminal switch unit realization.
Background technology
Display panels (LCD panel) had been applied as notebook computer or the display of mobile phone already widely, and because therefore the huge market demand also has continuous research and development improvement at processing procedure and panel construction design aspect.In order to ensure the quality of liquid crystal display, in the display panels processing procedure, can through the processing procedure of one lighting test (light on test, LOT), whether can normally show with the picture element (pixel) of determining display panels.Moreover, in order to ensure the stability of liquid crystal display, can when lighting test, use specific environmental testing variable aging to do (aging) test.If the display panels defectiveness then can accelerated deterioration when burn-in test, the tester can early detection and avoid faulty materials are flowed in client's hand.
Figure 1 shows that the synoptic diagram of a prior art lighting test system, wherein a lighting system plate 10A is the panel test point 22A that contacts via a probe 12A on a display panels 20A.This panel test point 22A is the electrode terminal district (electrode terminal) of display panels 20A, and can be connected to a circuit system end via flexible circuit board after test, to do the driving of display panels.Yet in above-mentioned lighting test system, owing to the static of lighting system plate 10A also can arrive panel test point 22A via probe 12A, might cause the broken string problem of display panels 20A internal wiring.Also may cause the damage of display panels circuit unit.
Prior art
The present invention
The first end points T1
The second end points T2 the 3rd end points T3
Static is got rid of resistance 34
Earth terminal 36
Summary of the invention
Therefore purpose of the present invention namely is to provide a kind of lighting test electrostatic defending device of the display panels that can destatic at the test front row.
Another object of the present invention is to provide a kind of lighting test electrostatic defending method of the display panels that can destatic at the test front row.
For reaching above-mentioned purpose, the invention provides a kind of lighting test electrostatic defending device of display panels, comprise one or three terminal switch unit and a static and get rid of resistance.This static is got rid of resistance and is electrically connected between a panel test point and the earth terminal, the one power switch interlock operation of this three terminal switch unit and a lighting system plate, with before the start of this lighting system plate with this lighting system plate earthing, and this panel test point got rid of resistance eutral grounding via this static, get rid of by this static of panel and this lighting system plate.After lighting system plate start, this three terminal switch unit can be set up being electrically connected of this lighting system plate and this panel test point, in order to testing.
For reaching above-mentioned purpose, the invention provides a kind of lighting test electrostatic defending method of display panels.Before this lighting system plate start, this lighting system plate is electrically connected to an earth terminal; And a panel test of this display panels o'clock is got rid of resistance and is electrically connected to this earth terminal via a static, by this can be at the front-seat static except panel and this lighting system plate of test.
Description of drawings
Figure 1 shows that the synoptic diagram of a prior art lighting test system.
Fig. 2 is the lighting test electrostatic defending device calcspar according to the display panels of the present invention's one preferred embodiments.
Fig. 3 A and Fig. 3 B use the operation chart of the lighting test electrostatic defending device of display panels of the present invention for explanation.
Fig. 4 is three terminal switch unit circuit diagrams according to a preferred embodiments of the present invention.
Drawing reference numeral:
Embodiment
Referring to Fig. 2, lighting test electrostatic defending device calcspar for the display panels of foundation the present invention one preferred embodiments, this electrostatic protection apparatus 30 is to be applied in to use the panel test of a lighting system plate 10 test one display panels (not icon) to put at 22 o'clock, to do the usefulness of electrostatic defending.As shown in this figure, this electrostatic protection apparatus 30 comprises one or three terminal switch unit 32 and a static is got rid of resistance 34 (for example being a high resistance measurement), this three terminal switch unit 32 comprises three end points: the first end points T1, the second end points T2 and the 3rd end points T3, and can operate (seeing aftermentioned for details) with a power switch interlock of this lighting system plate 10, optionally lighting system plate 10 is electrically connected to an earth terminal 36 or panel test point 22.More specifically, the first end points T1 of this three end points switch 32 is electrically connected on this lighting system plate 10; The second end points T2 is electrically connected to the first end 34A that this static is got rid of resistance 34, and is electrically connected to a panel test point 22 to be detected via a probe (not shown); The 3rd end points T3 then is electrically connected to the second end 34B (this earth terminal 36 and this static are got rid of the contact of resistance 34) of earth terminal 36 and this static eliminating resistance 34.This first end points T1 and the 3rd end points T3 consist of a closed type switch (normally-close switch), with when lighting system plate 10 is not started shooting (when also the power switch of lighting system plate 10 is not closed), be electrically connected this lighting system plate 10 and this earth terminal 36.This first end points T1 and this second end points T2 consist of an open type switch (normally-open switch), with when lighting system plate 10 is not started shooting, disconnect the electrical connection between this lighting system plate 10 and this panel test point 22.
Referring to Fig. 3 A and Fig. 3 B, use the operation chart of lighting test electrostatic defending device shown in Figure 2 for explanation.As shown in Figure 3A, when lighting system plate 10 is not started shooting (when also lighting system plate 10 power switches are not closed), this lighting system plate 10 and this earth terminal 36 are electrically connected, so the static of this lighting system plate 10 can be got rid of by this earth terminal 36.At this moment, this panel test point 22 is to get rid of resistance 34 and be electrically connected to this earth terminal 36 via this static, and the static on the panel also can and be got rid of to this earth terminal 36 via this static eliminating resistance 34.Shown in Fig. 3 B, after 10 starts of lighting system plate (when also being lighting system plate 10 power switches closure), this lighting system plate 10 disconnects and being electrically connected of this earth terminal 36, and is electrically connected to this panel test point 22 via the first end points T1 and this second end points T2 conducting.Because resistance 34 is high resistance measurements, therefore can not produce load effect and make the test signal of lighting system plate 10 can deliver to this panel test point 22.
Referring to Fig. 4, be three terminal switch unit, 32 circuit diagrams according to a preferred embodiments of the present invention, this three terminal switch unit 32 for example can be three end points electromagnetic relay (electromagneticrelay) switches, this the first end points T1 and the 3rd end points T3 consist of a closed type switch, and this first end points T1 and this second end points T2 consist of an open type switch.The power switch 12 of this lighting system plate 10 is electrically connected to an electromagnet 320, and the coiling of this electromagnet 320 configuration can (power switch 12 is closed rear) attract the first end points T1 to contact this second end points T2 after conduction, and the first end points T1 and the 3rd end points T3 are disconnected.Can produce path blocked operation shown in Fig. 3 A and Fig. 3 B by this circuit, reach at the static of test front panel and lighting system plate 10 and get rid of effect, with avoid panel of LCD when the test by the electrostatic breakdown of lighting system plate 10.
Three above-mentioned terminal switch unit 32 also can be electrically connected and form with the power switch 12 of lighting system plate 10 by other three end points switch modules, for example can use transistor switch or thyristor switch.The resistance value that this static is got rid of resistance 34 for example can be 50 Ω-2K Ω, and is bright to be unlikely to the affecting panel normal point.Yet should know this skill well known can the mating surface type structure and select the static of different resistance values to get rid of resistance, all within claim scope of the present invention.
Claims (5)
1. the lighting test electrostatic defending device of a display panels is used between the panel test point of a lighting system plate and a display panels, and this electrostatic protection apparatus comprises:
One static is got rid of resistance, is connected between described panel test point and the earth terminal; And
One or three terminal switch unit have one first end points, one second end points and one the 3rd end points; This first end points and the 3rd end points consist of a closed type switch, and this first end points and this second end points consist of an open type switch; This first end points is electrically connected to described lighting system plate, and this second end points is electrically connected to an end of described panel test point and described static eliminating resistance, and the 3rd end points is electrically connected to the other end and the described earth terminal that described static is got rid of resistance;
Before the start of lighting system plate, the static of described display panels and described lighting system plate can be got rid of to described earth terminal by this;
Wherein, described lighting system plate is the described panel test point that contacts via a probe on described display panels;
The resistance value that wherein said static is got rid of resistance is 50 Ω-2K Ω.
2. lighting test electrostatic defending device as claimed in claim 1, it is characterized in that, described three terminal switch unit are electrically connected with a power switch of described lighting system plate, with after this lighting system plate start, described the first end points is electrically connected with described the second end points, is electrically connected and this first end points is disconnected with described the 3rd end points.
3. lighting test electrostatic defending device as claimed in claim 2, it is characterized in that, described three terminal switch unit are an electromagnetic relay switch, and has an electromagnet that is electrically connected with the power switch of described lighting system plate, with after this lighting system plate start, described the first end points is electrically connected with described the second end points, is electrically connected and this first end points is disconnected with described the 3rd end points.
4. lighting test electrostatic defending device as claimed in claim 2 is characterized in that, described three terminal switch unit are transistor switch or door fluid switch.
5. the lighting test electrostatic defending method of a display panels, when being used in a lighting system plate display panels to be tested, this electrostatic protection method comprises:
Before described lighting system plate start, this lighting system plate is electrically connected to an earth terminal;
One panel test of described display panels o'clock is got rid of resistance and is electrically connected to described earth terminal via a static;
One or three terminal switch unit are provided, have one first end points, one second end points and one the 3rd end points; This first end points and the 3rd end points consist of a closed type switch, and this first end points and this second end points consist of an open type switch; This first end points is electrically connected to described lighting system plate, and this second end points is electrically connected to an end of described panel test point and described static eliminating resistance, and the 3rd end points is electrically connected to the other end and the described earth terminal that described static is got rid of resistance;
After described lighting system plate start, with the be electrically connected disconnection of this lighting system plate with described earth terminal; And
Described lighting system plate is electrically connected to the described panel test point of described display panels;
Wherein, described lighting system plate is the described panel test point that contacts via a probe on described display panels;
The resistance value that wherein said static is got rid of resistance is 50 Ω-2K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810110847 CN101604075B (en) | 2008-06-13 | 2008-06-13 | Lighting test electrostatic defending device of liquid crystal display panel and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810110847 CN101604075B (en) | 2008-06-13 | 2008-06-13 | Lighting test electrostatic defending device of liquid crystal display panel and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101604075A CN101604075A (en) | 2009-12-16 |
| CN101604075B true CN101604075B (en) | 2013-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810110847 Expired - Fee Related CN101604075B (en) | 2008-06-13 | 2008-06-13 | Lighting test electrostatic defending device of liquid crystal display panel and method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067844A (en) * | 2015-07-31 | 2015-11-18 | 苏州市华扬电子有限公司 | Lighting and line resistance value test fixture |
| CN106771974B (en) * | 2016-12-29 | 2019-07-12 | 武汉华星光电技术有限公司 | Display module lighting test device and method |
| JP7208733B2 (en) * | 2018-07-31 | 2023-01-19 | 日本電産サンキョー株式会社 | Conveyor system |
| CN110702955A (en) * | 2019-09-19 | 2020-01-17 | 南京中电熊猫平板显示科技有限公司 | Electrostatic protection device and anti-static test circuit |
| CN111398758A (en) * | 2020-04-29 | 2020-07-10 | 厦门市计量检定测试院 | Electrostatic testing device for liquid crystal display panel |
| CN113075477B (en) * | 2021-03-24 | 2023-12-12 | 京东方科技集团股份有限公司 | Display panel detection equipment, detection method and detection system thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155299A (en) * | 1998-11-20 | 2000-06-06 | Matsushita Electric Ind Co Ltd | Device and method for inspecting image display of liquid crystal panel |
| CN1580800A (en) * | 2003-08-05 | 2005-02-16 | 奇美电子股份有限公司 | Multifunctional detecting platform for liquid crystal display panel and its detecting method |
| CN101136156A (en) * | 2006-10-26 | 2008-03-05 | 塔工程有限公司 | Array tester |
| CN101175362A (en) * | 2006-11-01 | 2008-05-07 | 东京毅力科创株式会社 | Charge eliminating apparatus and method, and program storage medium |
-
2008
- 2008-06-13 CN CN 200810110847 patent/CN101604075B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000155299A (en) * | 1998-11-20 | 2000-06-06 | Matsushita Electric Ind Co Ltd | Device and method for inspecting image display of liquid crystal panel |
| CN1580800A (en) * | 2003-08-05 | 2005-02-16 | 奇美电子股份有限公司 | Multifunctional detecting platform for liquid crystal display panel and its detecting method |
| CN101136156A (en) * | 2006-10-26 | 2008-03-05 | 塔工程有限公司 | Array tester |
| CN101175362A (en) * | 2006-11-01 | 2008-05-07 | 东京毅力科创株式会社 | Charge eliminating apparatus and method, and program storage medium |
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| CN101604075A (en) | 2009-12-16 |
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