CN104008713A - Method for detecting and repairing display panel - Google Patents
Method for detecting and repairing display panel Download PDFInfo
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- CN104008713A CN104008713A CN201410116398.5A CN201410116398A CN104008713A CN 104008713 A CN104008713 A CN 104008713A CN 201410116398 A CN201410116398 A CN 201410116398A CN 104008713 A CN104008713 A CN 104008713A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008439 repair process Effects 0.000 claims abstract description 15
- 230000002950 deficient Effects 0.000 claims abstract 11
- 238000001514 detection method Methods 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 5
- 101100069049 Caenorhabditis elegans goa-1 gene Proteins 0.000 description 27
- 206010011968 Decreased immune responsiveness Diseases 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 230000002146 bilateral effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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Abstract
本发明公开了一种检测及修复显示面板的方法，包括：提供一显示面板，包括栅极线、一第一栅极驱动阵列电路及一第二栅极驱动阵列电路。第一栅极驱动阵列电路包括第一栅极驱动单元，与栅极线的第一端电连接。第二栅极驱动阵列电路包括第二栅极驱动单元，与栅极线的第二端电连接。当第一栅极驱动阵列电路失能时，对第二栅极驱动单元输入起始信号ST、高频信号HC、低准位开关信号(低频信号)LC与低准位信号VSS，对第一栅极驱动单元输入低准位开关信号LC与低准位信号VSS，并切断第一栅极驱动单元的起始信号ST与高频信号HC，以判断出不良第一栅极驱动单元。进行修复步骤，以修复不良第一栅极驱动单元。
The invention discloses a method for detecting and repairing a display panel, which includes: providing a display panel including gate lines, a first gate driving array circuit and a second gate driving array circuit. The first gate driving array circuit includes a first gate driving unit electrically connected to the first end of the gate line. The second gate driving array circuit includes a second gate driving unit electrically connected to the second end of the gate line. When the first gate drive array circuit is disabled, the start signal ST, the high-frequency signal HC, the low-level switch signal (low-frequency signal) LC and the low-level signal VSS are input to the second gate drive unit. The gate driving unit inputs the low-level switch signal LC and the low-level signal VSS, and cuts off the start signal ST and the high-frequency signal HC of the first gate driving unit to determine the defective first gate driving unit. Repair steps are performed to repair the defective first gate drive unit.
Description
Technical field
The present invention is about a kind of method that detects and repair display panel, and espespecially one has detection and the restorative procedure of the display panel of grid driving array (gate driver on array, GOA).
Background technology
In recent years, the development of flat-panel screens is more and more rapider, has replaced gradually traditional cathode-ray tube display.Two-d display panel now mainly contains following several: organic LED display panel (organic light emitting diode, OLED) display panel, Plasmia indicating panel (plasma display panel, and liquid crystal display (liquid crystal display PDP), LCD) panel etc., wherein display panels possesses the advantages such as low power consumption, frivolous and high-res, has become the main product of consumer display panel now.
Display panels mainly comprises liquid crystal panel and in order to drive gate driver circuit and the source electrode drive circuit of pixel.Gate driver circuit and source electrode drive circuit can utilize band to carry the form such as encapsulation (TCP) or glass flip chip encapsulation (COG) and be arranged on display base plate, or gate driver circuit can be formed directly in the substrate of liquid crystal panel, that is so-called grid drives array circuit (Gate driver-On-ArrayCircuit, GOA Circuit).Occur in array circuit when bad, being formed directly in the substrate of liquid crystal panel because grid drives array circuit when grid drives, drive array circuit so be difficult for repairing grid.
Summary of the invention
One of object of the present invention is to provide a kind of method that detects and repair display panel, drives array circuit with the grid that detects and/or repair display panel.
One embodiment of the invention provide a kind of method that detects and repair display panel, comprise the following steps.One display panel is provided.Display panel comprises that many gate lines, a first grid drive array circuit and a second grid to drive array circuit.Each gate line has a first end and one second end.First grid drives array circuit to comprise multiple first grid driver elements, be electrically connected with the first end of gate line respectively, wherein first grid driver element comprises multistagely, and the first grid driver element of upper level and the first grid driver element of next stage are electrically connected.Second grid drives array circuit to comprise multiple second grid driver elements, be electrically connected with the second end of gate line respectively, wherein second grid driver element comprises multistagely, and the second grid driver element of upper level and the second grid driver element of next stage are electrically connected.Carry out one first detecting step, drive array circuit and second grid to drive the wherein one anergy of array circuit to detect first grid.Carry out one second detecting step, in the time that first grid drives array circuit anergy, drive each second grid driver element of array circuit to input a start signal ST to second grid, one high-frequency signal HC, one low level switching signal (low frequency signal) LC and a low level signal VSS, first grid is driven to each first grid driver element input low level switching signal LC and the low level signal VSS of array circuit, and cut off first grid and drive start signal ST and the high-frequency signal HC of each first grid driver element of array circuit, to judge a bad first grid driver element.Carry out a reparation step, with faulty restoration first grid driver element.
The grid that the method for detection of the present invention and reparation display panel could effectively detect and repair the display panel with bilateral driving framework drives array circuit, therefore can reduce the number of scrapping of display panel, therefore significantly reduce the manufacturing cost of display panel.
Brief description of the drawings
Fig. 1 has illustrated the schematic diagram of the display panel of one embodiment of the invention.
Fig. 2 has illustrated the partial schematic diagram of the display panel of Fig. 1.
Fig. 3 has illustrated the sequential chart of the driving signal of the grid driving array circuit of the display panel of the present embodiment.
Fig. 4 has illustrated the detection of one embodiment of the invention and has repaired the method flow diagram of display panel.
Wherein, Reference numeral:
10 display panels
12 substrates
12A viewing area
12P surrounding zone
GL1～GLn gate line
DL1～DLm data line
P pixel
T1 first end
T2 the second end
GOA1 first grid drives array circuit
GOA2 second grid drives array circuit
14 source electrode drive circuits
UA1～UAn first grid driver element
UB1～UBn second grid driver element
21 pull-up units
22 drop-down unit
211 pull-up control circuits
212 pulling drive circuit
221 pull-down control circuits
222 drop-down driving circuits
ST start signal
HC high-frequency signal
HC1 high-frequency signal
HC2 high-frequency signal
HC3 high-frequency signal
HC4 high-frequency signal
HC5 high-frequency signal
HC6 high-frequency signal
HCn high-frequency signal
LC low level switching signal
LC1 the first low level switching signal
LC2 the second low level switching signal
VSS low level signal
30 steps
32 steps
34 steps
36 steps
Embodiment
Can further understand the present invention for making to be familiar with those skilled in the art, below spy enumerates preferred embodiment of the present invention, and coordinates accompanying drawing, describe in detail constitution content of the present invention and effect of wanting to reach.
Please refer to Fig. 1 and Fig. 2.Fig. 1 has illustrated the schematic diagram of the display panel of one embodiment of the invention, and Fig. 2 has illustrated the partial schematic diagram of the display panel of Fig. 1.As shown in Figure 1, the display panel 10 of the present embodiment is taking a display panels as example, but not as limit.Display panel 10 comprises a substrate 12, and wherein on substrate 12, definition has a viewing area (active region) 12A and a surrounding zone 12P.Display panel 10 comprises that many gate lines G L1～GLn, many data line DL1～DLm, multiple pixel (or being called time pixel) P are arranged in the 12A of viewing area.Gate lines G L1～GLn and data line DL1～DLm are arranged in a crossed manner in fact, and pixel P is arranged at respectively the crossover location of gate lines G L1～GLn and data line DL1～DLm.Any one of gate lines G L1～GLn all has a first end t1 and one second end t2.Display panel 10 more comprises that a first grid drives array circuit GOA1, a second grid to drive array circuit GOA2 and one source pole driving circuit 14, be arranged at surrounding zone 12P, wherein first grid drives the first end t1 of array circuit GOA1 and gate lines G L1～GLn to be electrically connected, second grid drives the second end t2 of array circuit GOA2 and gate lines G L1～GLn to be electrically connected, and source electrode drive circuit 14 is electrically connected with one end of data line DL1～DLm.
As shown in Figure 2, first grid drives array circuit GOA1 to comprise multiple first grid driver element UA1～UAn, be electrically connected with the first end t1 of gate lines G L1～GLn respectively, wherein first grid driver element UA1～UAn comprises multistage, wherein the first grid driver element of upper level and the first grid driver element of next stage are electrically connected, for example first grid driver element UA1 and first grid driver element UA2 are electrically connected, first grid driver element UA2 and first grid driver element UA3 are electrically connected, by that analogy.Second grid drives array circuit GOA2 to comprise multiple second grid driver element UB1～UBn, be electrically connected with the second end t2 of gate lines G L1～GLn respectively, second grid driver element UB1～UBn comprises multistage, wherein the second grid driver element of upper level and the second grid driver element of next stage are electrically connected, for example second grid driver element UB1 and second grid driver element UB2 are electrically connected, second grid driver element UB2 and second grid driver element UB3 are electrically connected, by that analogy.
In the present embodiment, first grid driver element UA1～UAn and second grid driver element UB1～UBn comprise on one respectively and draw unit, (pull-up) unit 21 and drop-down (pull-down) 22.Pull-up unit 21 comprises a pull-up control circuit 211, in order to receive start signal ST and high-frequency signal HC, and a pulling drive circuit 212, be electrically connected with pull-up control circuit 211 and corresponding gate lines G L1～GLn, and receive the high-frequency signal HC that pull-up control circuit 211 transmits.Drop-down unit 22 comprises a pull-down control circuit 221, be connected with pull-up unit 21, in order to receive low level switching signal LC and low level signal VSS, and a drop-down driving circuit 222, be connected with pull-up unit 21, wherein low level switching signal LC is low frequency signal.
Please refer to Fig. 3, and in the lump with reference to figure 1 and Fig. 2.Fig. 3 has illustrated the sequential chart of the driving signal of the grid driving array circuit of the display panel of the present embodiment.In the present embodiment, HC1～HC6 signal of first grid driver element UA1～UA6 that start signal ST, the first order to the are six grades (or HC1～HC6 signal of the second grid driver element UB1～UB6 of six grades of the first order to the), low level switching signal LC1, LC2, and the sequential of low level signal VSS as shown in Figure 3, but not as limit.The grid of the display panel of the present embodiment drives the drive principle of array circuit as described below.Start signal ST can start the pull-up control circuit 211 of the first order, the pull-up control circuit 211 meeting output high-frequency signal HC1 of the first order open the pulling drive circuit 212 of the first order, the pulling drive circuit 212 of the first order can be delivered to Article 1 gate lines G L1 by high-frequency signal HC1, also plays the part of the start signal ST of the pull-up control circuit 211 of the second level simultaneously.The pull-up control circuit 211 of the second level can be opened the pulling drive circuit 212 of the second level by output high levle signal HC2, the pulling drive circuit 212 of the second level can be delivered to Article 2 gate lines G L2 by high-frequency signal HC2, and the pulling drive circuit 212 of the second level is except opening the pull-up control circuit 211 of the third level, also can start the drop-down driving circuit 222 of the first order, and the drop-down driving circuit 222 of the first order can cut out the pull-up control circuit of the first order 211 and pulling drive circuit 212.In addition, during this period of time pent from being opened to except pull-up control circuit 211, pull-down control circuit 221 (mu balanced circuit) is operating always closes pull-up control circuit at the corresponding levels 211 and pulling drive circuit 212.From above-mentioned drive principle, it is that one-level passes one-level that grid drives array circuit, and one-level is drawn one-level, interlocks each other, as long as there is any one-level extremely will cause whole circuit abnormalities.In addition, in the present embodiment, low level switching signal LC is a low frequency signal, and low level switching signal LC can comprise the first low level switching signal LC1 and the second low level switching signal LC2, two groups of low frequency signals are taken turns current control mu balanced circuits, therefore can extend the life-span of mu balanced circuit.
It is to adopt bilateral driving framework that the grid of the display panel 10 of the present embodiment drives array circuit, that is to say, the gate drive signal that first grid drives array circuit GOA1 and second grid to drive array circuit GOA2 to provide is provided respectively at the two ends of gate lines G L1～GLn, can reduce by this problem of pressure drop that resistance capacitance load (RC loading) effect of gate drive signal produces, particularly, for large scale display panel, bilateral driving framework can effectively reduce the problem of pressure drop that resistance capacitance load effect produces.In the time that the first grid of display panel 10 drives array circuit GOA1 and second grid to drive the wherein one of array circuit GOA2 to occur extremely to affect display effect, the first grid that the method for detection of the present invention and reparation display panel can correctly detect display panel 10 drives array circuit GOA1 and second grid to drive the whichever of array circuit GOA2 to occur extremely, and can further detect the bad drive element of the grid that abnormal first grid driving array circuit GOA1 or second grid driving array circuit GOA2 occur, and can further repair bad drive element of the grid.
Refer again to Fig. 4, and in the lump referring to figs. 1 to Fig. 3.Fig. 4 has illustrated the detection of one embodiment of the invention and has repaired the method flow diagram of display panel.As shown in Figure 4, the method for the detection of the present embodiment and reparation display panel comprises the following steps.
Step 30: the display panel that Fig. 1 and Fig. 2 are provided;
Step 32: carry out one first detecting step, drive array circuit GOA1 and second grid to drive the wherein one anergy of array circuit GOA2 to detect first grid;
Step 34: carry out one second detecting step, in the time that first grid drives array circuit GOA1 anergy, second grid is driven to second grid driver element UB1～UBn input start signal ST of array circuit GOA2, high-frequency signal HC, low level switching signal LC and low level signal VSS, first grid is driven to first grid driver element UA1～UAn input low level switching signal LC and the low level signal VSS of array circuit GOA1, and cut off first grid and drive start signal ST and the high-frequency signal HC of first grid driver element UA1～UAn of array circuit GOA1, to judge a bad first grid driver element, and
Step 36: carry out a reparation step, with faulty restoration first grid driver element.
Below be described in further detail for the detection of the present embodiment and the method for reparation display panel.The present embodiment the first detecting step comprises the following steps.First grid is driven to first grid driver element UA1～UAn input start signal ST, high-frequency signal HC, low level switching signal LC and the low level signal VSS of array circuit GOA1, second grid is not driven second grid driver element UB1～UBn input start signal ST, high-frequency signal HC, low level switching signal LC and the low level signal VSS of array circuit GOA2, to judge that first grid drives whether anergy of array circuit GOA1.Because driving second grid driver element UB1～UBn of array circuit GOA2, second grid do not receive start signal ST, high-frequency signal HC, low level switching signal LC and low level signal VSS, if therefore first grid drives array circuit GOA1 anergy, display panel 10 cannot normally show.In addition, second grid is driven to second grid driver element UB1～UBn input start signal ST, high-frequency signal HC, low level switching signal LC and the low level signal VSS of array circuit GOA2, first grid is not driven first grid driver element UA1～UAn input start signal ST, high-frequency signal HC, low level switching signal LC and the low level signal VSS of array circuit GOA1, to judge that second grid drives whether anergy of array circuit GOA2.Because driving first grid driver element UA1～UAn of array circuit GOA1, first grid do not receive start signal ST, high-frequency signal HC, low level switching signal LC and low level signal VSS, if therefore second grid drives array circuit GOA2 anergy, display panel 10 cannot normally show.Therefore,, in the time that first grid drives array circuit GOA1 and second grid to drive the wherein one anergy of array circuit GOA2, can detect by above-mentioned sequentially monolateral drive pattern.
In second detecting step of the present embodiment, in the time that first grid drives array circuit GOA1 anergy, drive second grid driver element UB1～UBn of array circuit GOA2 to input a start signal ST to second grid, one high-frequency signal HC, one low level switching signal LC and a low level signal VSS, drive first grid driver element UA1～UAn of array circuit GOA1 to input a low level switching signal LC and a low level signal VSS to first grid, and cut off first grid and drive a start signal ST and a high-frequency signal HC of first grid driver element UA1～UAn of array circuit GOA1.After high-frequency signal HC is cut off, first grid drives the input end of the high-frequency signal HC of first grid driver element UA1～UAn of array circuit GOA1 to understand loss signal level and in floating (floating) state, can judge by this bad first grid driver element.Cut off first grid and drive start signal ST and the high-frequency signal HC of first grid driver element UA1～UAn of array circuit GOA1 can utilize for example laser cutting, or utilize switch to be controlled.Speak by the book, because first end t1 and the second end t2 of gate lines G L1～GLn drive array circuit GOA1 and second grid to drive array circuit GOA2 to be electrically connected with first grid respectively, in the time that first grid drives the start signal ST of first grid driver element UA1～UAn of array circuit GOA1 and high-frequency signal HC to be cut off, can make the pull-up control circuit 211 of the first order to start, now pulling drive circuit 212 does not also act on, but it is normal output that second grid drives array circuit GOA2, so transmission grating polar curve GL2～GLn can drive first grid the pull-up control circuit 211 of the second level to the n level of array circuit GOA1 to open, and make pulling drive circuit 212 output signals, but because driving the high-frequency signal HC of array circuit GOA1, first grid is cut off, therefore the level that pulling drive circuit 212 is exported is not right, because second grid drives array circuit GOA2 normal, the voltage of gate lines G L2～GLn still can be in Vgh level.Abnormal level circuit may be the short circuit of signal wire of gate line and transmitting high-frequency signal HC or the short circuit of the signal wire of gate line and transmission low level signal VSS, even drive in the normal situation of array circuit GOA2 at second grid, the driving voltage difference to some extent of the gate line that the driving voltage of the gate line being connected with the first grid driver element of abnormal level still can be connected with the first grid driver element of other grades, therefore from showing, can see significantly extremely, and detect bad first grid driver element.
Detecting after bad first grid driver element, the reparation step that can take can comprise the electric connection of cutting off bad first grid driver element and the first end of corresponding gate line.For example, if the first grid driver element UA3 that bad first grid driver element is the third level, the electric connection of the first grid driver element UA3 that can cut off the third level and the first end t1 of corresponding gate lines G L3.Now, on showing, can form a faint line corresponding to the pixel P of gate lines G L3, but still be acceptable display frame.
In addition, it is because the abnormal institute of drop-down unit exception or pull-up unit causes that the detection method of the present embodiment can further be judged bad first grid driver element, and takes corresponding repair mode.For example, if drop-down unit exception can see that the cycle is the abnormal occurrence of 1.6 seconds, otherwise, be that pull-up unit is abnormal.If drop-down unit exception, repairs the input end that step can comprise the low level signal VSS that cuts off bad drop-down unit.For example, if the drop-down unit 22 of the first grid driver element UA3 that bad drop-down unit is the third level, the end of repairing the low level signal VSS that step can comprise the drop-down unit 22 of the first grid driver element UA3 that cuts off the third level enters end.If pull-up unit is abnormal, repair the input end that step can comprise the high-frequency signal HC that cuts off bad pull-up unit.For example,, if the pull-up unit 21 of the first grid driver element UA3 that bad pull-up unit is the third level is repaired the signal of floating that step can comprise the input end of the pull-up unit 21 that cuts off the first grid driver element UA3 to the third level.
Above-described embodiment occurs when abnormal as example illustrates detection of the present invention and the method for repairing display panel taking first grid driver element, if second grid driver element occurs when abnormal, and the method that can also use identical detection and repair display panel.
In sum, the grid that the method for detection of the present invention and reparation display panel could effectively detect and repair the display panel with bilateral driving framework drives array circuit, therefore can reduce the number of scrapping of display panel, therefore significantly reduce the manufacturing cost of display panel.In addition, detection of the present invention and reparation display panel need additionally not arrange patch cord on display panel, more can reduce the layout area of surrounding zone.
The foregoing is only preferred embodiment of the present invention, all equalizations of making according to the claims in the present invention protection domain change and amendment, all should belong to covering scope of the present invention.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103105729A TWI522978B (en) | 2014-02-20 | 2014-02-20 | Inspection and repairing method of display panel |
| TW103105729 | 2014-02-20 |
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| Publication Number | Publication Date |
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| CN104008713A true CN104008713A (en) | 2014-08-27 |
| CN104008713B CN104008713B (en) | 2016-08-17 |
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| CN201410116398.5A Expired - Fee Related CN104008713B (en) | 2014-02-20 | 2014-03-26 | Method for detecting and repairing display panel |
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| TW (1) | TWI522978B (en) |
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| CN107463041B (en) * | 2017-08-31 | 2020-05-19 | 深圳市华星光电技术有限公司 | Peripheral circuit structure of array substrate |
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| CN109445137A (en) * | 2018-12-25 | 2019-03-08 | 惠科股份有限公司 | Manufacturing method and repairing method of display device and display device |
| WO2020133632A1 (en) * | 2018-12-25 | 2020-07-02 | 惠科股份有限公司 | Manufacturing method and repair method for display device, and display device |
| US11017703B2 (en) | 2018-12-25 | 2021-05-25 | HKC Corporation Limited | Method for manufacturing display device, method for repairing display device, and display device |
| CN110133927A (en) * | 2019-04-30 | 2019-08-16 | 深圳市华星光电半导体显示技术有限公司 | Display panel and its restorative procedure |
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Also Published As
| Publication number | Publication date |
|---|---|
| TWI522978B (en) | 2016-02-21 |
| CN104008713B (en) | 2016-08-17 |
| TW201533717A (en) | 2015-09-01 |
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