CN101334988B - Display apparatus having repaired circuit layout - Google Patents
Display apparatus having repaired circuit layout Download PDFInfo
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- CN101334988B CN101334988B CN2007101270671A CN200710127067A CN101334988B CN 101334988 B CN101334988 B CN 101334988B CN 2007101270671 A CN2007101270671 A CN 2007101270671A CN 200710127067 A CN200710127067 A CN 200710127067A CN 101334988 B CN101334988 B CN 101334988B
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Abstract
The invention relates to a display device which can repair circuittopology. The data signal which can not be transmitted to a plurality of pixels for the breaking of a data wire is transmitted to the pixels by another path. An amplifier is arranged on the path, and the feedback vertex of the amplifier is located on the substrate of the pixel. The display device can not only solve the breaking of the data wire, but also reduce the distortion arising as a result of the decrease of a data signal.
Description
Technical field
The present invention relates to a kind of display device, and particularly relate to a kind of display device with repaired circuit layout.
Background technology
Along with development of science and technology, electronic product has been full of in daily life, and display device more becomes the important media that people obtain information.Generally speaking, have the display panel (Display Panel) of display message and the driving circuit of control display panel in the display device.Driving circuit provides the pixel of data-signal to display panel (Pixel) through data line, so that display panel presents picture.
Yet, in making the process of display device, the problem of broken data wire often takes place, make the decrease in yield of display device.In order to solve the problem of broken data wire, prior art has proposed a kind of technology of repairing broken string.Fig. 1 is a kind of existing synoptic diagram with display device of repaired circuit layout.Please with reference to Fig. 1, display device 100 comprises first substrate 110 and second substrate 120, and second substrate 120 has amplifier 126.First substrate 110 for example is a display panel.Second substrate 120 for example is a drive circuit board.First substrate 110 has comprised a plurality of pixels 112.Second substrate 120 provides data-signal Vin pixel 112 to first substrate 110 through many data lines (with data line 122 and 124 expressions).
(with the position of " * " among Fig. 1 expression broken string) can data line 122 be divided into data line 122A and 122B, and data-signal Vin only can reach data line 122A when broken string took place tentation data line 122.In other words, data line 122B can't receive data-signal Vin.In order to make data line 122B also can receive data-signal Vin, so prior art utilizes laser technology that another signaling path is provided.Just, utilize laser technology respectively weld M1 and weld M3 to be carried out welding.Thus, data-signal Vin then can pass through lead 122A, weld M1, amplifier 126, weld M3 in regular turn and pass to data line 122B, and the pixel (not illustrating) that data line 122B is coupled also can present data.
Fig. 2 is the schematic equivalent circuit according to Fig. 1 illustrated.Please with reference to Fig. 1 and Fig. 2, terminal A can receive data-signal Vin.Because two input ends of amplifier 126 can be considered virtual short (Virtual Short), so terminal B can receive data-signal Vin equally.In addition, because that the impedance phase between terminal B and the end points C is worked as is little, so the data-signal Vout ' of end points C can be considered identical with the data-signal Vin of terminal B.By above-mentioned push away data-signal Vout=Vin * Zs/ (Zr+Zs) of end points D, wherein, impedance Z r is the lead impedance between end points C and the end points D, impedance Z s is the lead impedance between end points D and the broken string position " * ".
Solved the broken string problem though it should be noted that prior art, the impedance between end points C and the end points D has but caused the decay of signal.Therefore the pixel (not illustrating) that the signal attenuation meeting is connected data line 122B can't obtain the signal of sufficient intensity, between brightness that the pixel (not illustrating) that data line 122B is connected is shown and ideal value, can have big gap, has caused the distortion of picture.If can make the signal Vout of end points D more be similar to the signal of terminal A, then can significantly improve the brightness and the inconsistent problem of ideal value of the pixel 112 that data line 122B connected.
In view of this, suitable settling mode there's no one who doesn't or isn't is eager to seek in the relevant manufacturer of display device, to overcome above-mentioned problem.
Summary of the invention
The present invention provides a kind of display device with repaired circuit layout, not only solves the broken string problem of panel, has more reduced the distortion that signal causes because of decay.
The present invention proposes a kind of display device with repaired circuit layout.This display device comprises first substrate, second substrate, first amplifier, the first preparation line, the first reparation line and first feedback line.Dispose many data lines on first substrate, wherein, each bar data line is coupled to corresponding a plurality of pixel.Dispose first driving circuit on second substrate, this first driving circuit is coupled to first end of each bar data line.The first preparation line is suitable for mutual welding with the first end suspension joint of partial data line at least, and this first preparation line also couples the positive input terminal of first amplifier.First end of the first reparation line is coupled to the output terminal of first amplifier, and second end of this first reparation line is coupled to second end of the said line of partial data at least.First end of first feedback line is coupled to the negative input end of first amplifier, and the tie point that second end of this first feedback line and first is repaired line is positioned at first substrate.
In one embodiment of this invention, above-mentioned display device more comprises second amplifier, the second preparation line, the second reparation line and second feedback line.The first end suspension joint of the data line of second preparation line and another part and be suitable for mutual welding, this second positive input terminal of preparing line and being coupled to second amplifier.First end of the second reparation line is coupled to the output terminal of second amplifier, and second end of this second reparation line is coupled to second end of the data line of said another part.First end of second feedback line is coupled to the negative input end of second amplifier, and the tie point that second end of this second feedback line and second is repaired line is positioned at first substrate.
In one embodiment of this invention, above-mentioned display device more comprises the 3rd substrate.Dispose second driving circuit on the 3rd substrate.More dispose the multi-strip scanning line on first substrate.Each bar sweep trace is coupled to corresponding a plurality of pixel, and second driving circuit is coupled to first end of each bar sweep trace.In addition, the first reparation line can pass through second substrate, the 3rd substrate and first substrate in regular turn.In addition, first feedback line can pass through second substrate, the 3rd substrate and first substrate in regular turn.
In display device of the present invention, be to utilize amplifier to be sent to above-mentioned pixel through another path, and make the feedback point of amplifier be positioned at the substrate that disposes above-mentioned pixel because of the data-signal that broken string can't be sent to a plurality of pixels takes place data line.Thus, not only solve the broken string problem of the data line of display device, more reduced the distortion that data-signal causes because of decay.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts preferred embodiment, and conjunction with figs., elaborates as follows.
Description of drawings
Fig. 1 is a kind of existing synoptic diagram with display device of repaired circuit layout.
Fig. 2 is the schematic equivalent circuit according to Fig. 1 illustrated.
Fig. 3 A is the synoptic diagram according to the display device with repaired circuit layout of the first embodiment of the present invention.
Fig. 3 B is the synoptic diagram according to a kind of pixel of the first embodiment of the present invention.
Fig. 4 is the schematic equivalent circuit of Fig. 3 A.
Fig. 5 is the synoptic diagram according to the display device with repaired circuit layout of second embodiment of the invention.
Fig. 6 is the synoptic diagram according to the display device with repaired circuit layout of third embodiment of the invention.
The reference numeral explanation
100,300: display device
110,310: the first substrates
330,340: driving circuit
120,320: the second substrates
126,350,352: amplifier
360: the three substrates
112,302: pixel
122,122A, 122B, 124,332,334,336: data line
342,344: sweep trace
" * ": the position of broken string
Bk1, Bk3: preparation line
R10, R12, R14: repair line
F10, F12, F14: feedback line
A, B, C, D, A1, B1, C1: end points
Zs, Zr, Zf: impedance
If, Ir, Is: electric current
Vin, Vout, Vout ': data-signal
M1, M3, M10, M12, M14, M16: weld
D1, D3, D5: tie point
304: transistor
306: MM CAP
308: pixel capacitance.
Embodiment
Fig. 3 A is the synoptic diagram according to the display device with repaired circuit layout of the first embodiment of the present invention.Please refer to Fig. 3 A, this display device 300 with repaired circuit layout comprises first substrate 310, second substrate 320, amplifier 350, preparation line Bk1, repairs line R10 and feedback line F10.In the present embodiment, amplifier 350 is disposed on second substrate 320, and is that example describes with the operational amplifier.First substrate 310 is that example describes with the glass substrate, and first substrate 310 also can be other type of substrate in other embodiments, for example is transparency carrier, acryl substrate ... or the like.Dispose many data lines (at this with data line 332,334 and 336 expressions) on first substrate 310, wherein, each bar data line is coupled to corresponding a plurality of pixel (at this with pixel 302 expressions).Prepare the first end suspension joint (Floating) of line Bk1 and data line 332,334 and 336 and be suitable for mutual welding, and preparation line Bk1 is coupled to the first input end of amplifier 350.The display device 300 of present embodiment can be the display device of LCD, organic electro-luminescent display or other pattern.
Fig. 3 B is the synoptic diagram according to the pixel of the first embodiment of the present invention.Please be simultaneously with reference to Fig. 3 A and Fig. 3 B, driving circuit 340 is an example with scan drive circuit (Scan Drive Circuit) in the present embodiment, driving circuit 340 provides sweep signal to pixel 302 through multi-strip scanning line (representing it with sweep trace 342,344 at this).Each pixel 302 has for example comprised transistor 304, MM CAP 306 and pixel capacitance 308, shown in Fig. 3 B.
As stated, the gate terminal of transistor 304 is coupled to sweep trace 342, and first source-drain electrode of transistor 304 is coupled to data line 332.First end of MM CAP 306 is coupled to second source-drain electrode of transistor 304, and second end of MM CAP 306 is coupled to first voltage.First end of pixel capacitance 308 is coupled to second source-drain electrode of transistor 304, and second end of pixel capacitance 308 is coupled to second voltage.In brief, driving circuit 340 is in order to provide sweep signal to pixel 302.Though the embodiment of Fig. 3 A describes with 3 driving circuits 340, in other embodiments, the quantity of driving circuit 340 can be adjusted arbitrarily according to its demand.For example, the quantity of driving circuit 340 can be one.
Please continue the A with reference to Fig. 3, when broken string takes place data line 334 (with the position of " * " among Fig. 3 A expression broken string), the data-signal that driving circuit 330 is provided can't be delivered to each pixel 302 that Lower Half coupled of data line 334.In order to make data-signal also can be sent to each pixel 302 that Lower Half coupled of data line 334, present embodiment provides another paths with data signal.For example, after confirming that data line 334 breaks, with laser weld M10 is welding together earlier, also is about to prepare the mutual welding of line Bk1 and data line 334 in the position of suspension joint.By this, can make preparation line Bk1 and data line 334 mutual conductings, then the data-signal that provided of driving circuit 330 can be in regular turn through data line 334, weld M10 and prepare the first input end (positive input terminal) that line Bk1 input to amplifier 350.Though present embodiment is example with the laser technology preparation line Bk1 and data line 334 are carried out welding, this area has common knowledge the knowledgeable also can change embodiment according to its demand.In other words, when broken string took place for data line 334, the first input end that can be by any way first end of data line 334 be coupled to amplifier 350 got final product.
As stated,, couple each other, will repair the Lower Half of line R10 and data line 334 and couple but also can use other suitable mode so that repair the Lower Half of line R10 and data line 334 then with weld M12 welding.So; The data-signal that driving circuit 330 is provided arrives the Lower Half of data line 334 through data line 334, weld M10, preparation line Bk1, amplifier 350, reparation line R10, feedback line F10 and weld M12, solved the problem of data line 334 generation broken strings.
Please, find out the relation that couples of repairing line R10 and feedback line F10 by knowing among Fig. 3 A again with reference to figure 3A.First end of repairing line R10 is coupled to the output terminal of amplifier 350.First end of feedback line F10 is coupled to second input end (negative input end) of amplifier 350.Second end of feedback line F10 is positioned on first substrate 310 with the tie point D1 that repairs line R10.The present technique field has also visual its demand of common knowledge the knowledgeable; And change the position of tie point D1 according to spirit of the present invention and aforementioned teaching at embodiment, make the feedback signal of amplifier 350 can be from feeding back near the position of the Lower Half of data line 334.So, can obtain to reduce the advantage of the decay of signal.
As stated, Fig. 4 is the schematic equivalent circuit of Fig. 3 A.Please be simultaneously with reference to Fig. 3 A and Fig. 4, the terminal A 1 among Fig. 4 can receive data-signal Vin.Because two input ends of amplifier 350 are virtual short, so terminal B 1 also can receive data-signal Vin.The impedance of line R10 is repaired in impedance Z r representative, and impedance Z f represents the impedance of feedback line F10, impedance Z s representative data line 334 from weld M12 to the lead impedance of breaking between the position " * ".Suppose that the data-signal through end points C1 is Vout ', the data-signal through tie point D1 is Vout, and the electric current through end points C1 is Ir, is Is by tie point D1 toward the electric current of impedance Z s, is If by tie point D1 toward the electric current of impedance Z f.By above-mentioned push away pressure reduction (that is pressure reduction of impedance Z f) Δ V=Vout-Vin=If * Zf of feedback line F10, so Vout=Vin+If * Zf.Again because the input end of amplifier 350 is a high impedance; Therefore electric current I f levels off to 0; That is to say
in other words; In the present embodiment because of adopting the design of position configuration on first substrate 310 with the tie point D1 that repairs line R10, so can significantly reduce the decay of data-signal with feedback line F10.So, can avoid because of signal attenuation, and the problem of the luminance shortage that the pixel 302 that the data line 334 below the broken string position " * " is connected is shown.
The present technique field has also visual its demand of common knowledge the knowledgeable, according to spirit of the present invention with aforementioned at embodiment teaching and change the number of amplifier, and suitably adjust it and couple relation, can be in order to repair a plurality of broken string problems.For example, Fig. 5 is the synoptic diagram according to the display device with repaired circuit layout of second embodiment of the invention.Please refer to Fig. 5; First substrate 310, second substrate 320, driving circuit 330, driving circuit 340, to repair line R10, feedback line F10, data line 332～336, sweep trace 342 and 344, pixel 302 and amplifier 350 same as the previously described embodiments, repeats no more at this.It should be noted that amplifier 352, preparation line Bk3, reparation line R12 and the feedback line F12 of present embodiment.
As stated, when broken string also takes place data line 336 (with the position of " * " among Fig. 5 expression broken string), the data-signal that driving circuit 330 is provided can't be delivered to each pixel 302 that Lower Half coupled of data line 336.In order to make data-signal also can be sent to each pixel 302 that Lower Half coupled of data line 336, present embodiment provides another paths with data signal.For example, after confirming that data line 336 breaks, weld M14 is welding together, also is about to prepare the mutual welding of line Bk3 and data line 336 in the position of suspension joint with laser.By this, can make preparation line Bk3 and data line 336 mutual conductings, the data-signal that then driving circuit 330 provided can pass through data line 336, weld M14 are input to amplifier 352 with preparation line Bk3 first input end (positive input terminal) in regular turn.
As stated, then with weld M16 welding, couple each other so that repair the Lower Half of line R12 and data line 336.The data-signal that so, can make driving circuit 330 and provided through data line 336, weld M14, preparation line Bk3, amplifier 352, repair line R12, feedback line F12 and weld M16 and arrive the Lower Half of data line 336.So, can solve the problem that broken string takes place data line 336, make the pixel that Lower Half coupled 302 of data line 336 receive data-signal.
Please, find out the relation that couples of repairing line R12 and feedback line F12 by knowing among Fig. 5 again with reference to figure 5.First end of repairing line R12 is coupled to the output terminal of amplifier 352.First end of feedback line F12 is coupled to second input end (negative input end) of amplifier 352.Second end of feedback line F12 is positioned on first substrate 310 with the tie point D3 that repairs line R12.It should be noted that tie point D3 more near the data line 336 that broken string takes place, then signal attenuation degree will be littler.Therefore, present embodiment designs tie point D3 on first substrate 310, to reduce the situation of data-signal decay.
The present technique field has also visual its demand of common knowledge the knowledgeable, changes the path that couples of repairing line, feedback line according to the teaching of spirit of the present invention and aforementioned all embodiment, but and the allocation position of appropriate change driving circuit.For example, Fig. 6 is the synoptic diagram according to the display device with repaired circuit layout of third embodiment of the invention.Please refer to Fig. 6, first substrate 310, second substrate 320, driving circuit 330, data line 332～336, sweep trace 342 and 344, pixel 302 and amplifier 350 are same as the previously described embodiments, repeat no more at this.It should be noted that reparation line R14, feedback line F14, driving circuit 340 and the 3rd substrate 360 of present embodiment.
As stated, the 3rd substrate 360 is that example describes it with the printed circuit board (PCB).In other embodiments, the 3rd substrate 360 also can be flexible circuit board or other suitable substrate.In the present embodiment, driving circuit 340 is disposed on the flexible circuit board that is connected across between first substrate 310 and the 3rd substrate 360.Driving circuit 340 is used to provide the sweep trace 342 and 344 of sweep signal to first substrate 310.In another embodiment, also can driving circuit 340 directly be configured on the 3rd substrate 360.In addition, the quantity of driving circuit 340 also can change it according to its demand, and for example the quantity of driving circuit 340 can be one in another embodiment.
The impedance meeting that is formed on the circuit on the printed circuit board (PCB) (the 3rd substrate 360) is less than the impedance that is formed on the circuit on the glass substrate (first substrate 310).Therefore, in order to improve the problem of signal attenuation, the reparation line R14 of present embodiment passes through second substrate 320 and the 3rd substrate 360 and first substrate 310 that arrives in regular turn from the output terminal of amplifier 350.Feedback line F14 then passes through second substrate 320 and the 3rd substrate 360 and first substrate 310 that arrives from the negative input end of amplifier 350 in regular turn.Simultaneously, the tie point D5 of reparation line R14 and feedback line F14 is positioned on first substrate 310.Thus, can further reduce the impedance of repairing line R14 and feedback line F14, use the situation of improving the data-signal decay.
The present technique field has also visual its demand of common knowledge the knowledgeable, changes the allocation position of amplifier according to the teaching of spirit of the present invention and aforementioned all embodiment, and suitably adjusts the path that couples of preparation line, feedback line and reparation line.For example, can the amplifier 350 of the embodiment of Fig. 6 be disposed at the 3rd substrate 360.Again for example, can the amplifier 350 of each embodiment be incorporated in driving circuit 330 or the driving circuit 340.
In sum, in the display device of each embodiment of the invention described above, have advantage with repaired circuit layout:
1. subsequent use signal transmission path is provided, when broken string taking place, data-signal is sent to the pixel that is coupled to below, broken data wire place through this signal transmission path, with the broken string problem of the data line that solves display device at data line.
2. the feedback point with amplifier is configured in the substrate that broken string takes place, and has reduced the distortion that data-signal causes because of decay.
3. the reparation line with amplifier out is formed on as far as possible and can low resistivity materials constitutes on the substrate of circuit, to improve the decay situation of data-signal with the feedback line that negative input end was connected of amplifier.
Though the present invention discloses as above with preferred embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining of the present invention.
Claims (9)
1. display device with repaired circuit layout comprises:
One first substrate disposes many data lines on this first substrate, and wherein, each said data line is coupled to corresponding a plurality of pixel;
One second substrate disposes one first driving circuit on this second substrate, this first driving circuit is coupled to first end of said data line;
One first amplifier;
One first preparation line, suspension joint at least the said data line of part first end and be suitable for mutual welding, this first preparation line also couples the positive input terminal of this first amplifier;
One first repairs line, and first end of this first reparation line is coupled to the output terminal of this first amplifier, and second end of this first reparation line is coupled to second end of the said data line of said part at least; And
One first feedback line, first end of this first feedback line is coupled to the negative input end of this first amplifier, and the tie point of second end of this first feedback line and this first reparation line is positioned at this first substrate.
2. display device as claimed in claim 1 wherein, also comprises:
One second amplifier;
One second preparation line, first end of the said data line of suspension joint another part and be suitable for mutual welding, this second preparation line also is coupled to the positive input terminal of this second amplifier;
One second repairs line, and first end of this second reparation line is coupled to the output terminal of this second amplifier, and second end of this second reparation line is coupled to second end of the said data line of said another part; And
One second feedback line, first end of this second feedback line is coupled to the negative input end of this second amplifier, and the tie point of second end of this second feedback line and this second reparation line is positioned at this first substrate.
3. display device as claimed in claim 1 wherein, also comprises:
One the 3rd substrate disposes one second driving circuit on the 3rd substrate, wherein, more dispose the multi-strip scanning line on this first substrate, and each said sweep trace is coupled to corresponding a plurality of pixel, and this second driving circuit is coupled to first end of said sweep trace.
4. display device as claimed in claim 3, wherein, this first reparation line is in regular turn through this second substrate, the 3rd substrate and this first substrate.
5. display device as claimed in claim 3, wherein, this first feedback line is in regular turn through this second substrate, the 3rd substrate and this first substrate.
6. display device as claimed in claim 3, wherein, the 3rd substrate is a printed circuit board (PCB).
7. display device as claimed in claim 3, wherein, each said pixel comprises:
One transistor, this transistorized gate terminal be coupled to said sweep trace one of them, this transistorized first source-drain electrode be coupled to said data line one of them;
One MM CAP, first end of this MM CAP are coupled to this transistorized second source-drain electrode, and second end of this MM CAP is coupled to one first voltage; And
One pixel capacitance, first end of this pixel capacitance are coupled to this transistorized second source-drain electrode, and second end of this pixel capacitance is coupled to one second voltage.
8. display device as claimed in claim 1, wherein, this first substrate is a glass substrate.
9. display device as claimed in claim 1, wherein, this second substrate is a printed circuit board (PCB).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101270671A CN101334988B (en) | 2007-06-28 | 2007-06-28 | Display apparatus having repaired circuit layout |
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| CN2007101270671A CN101334988B (en) | 2007-06-28 | 2007-06-28 | Display apparatus having repaired circuit layout |
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| CN101334988B true CN101334988B (en) | 2012-06-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101561983B (en) * | 2009-05-15 | 2010-12-08 | 友达光电（苏州）有限公司 | Display panel |
| TWI415064B (en) * | 2010-12-30 | 2013-11-11 | Au Optronics Corp | Control circuit of display panel and control method of same |
| CN102789077B (en) * | 2012-08-01 | 2014-12-10 | 京东方科技集团股份有限公司 | LCD device and repair method thereof |
| CN105607367B (en) * | 2016-01-04 | 2017-12-15 | 重庆京东方光电科技有限公司 | Display panel, display device and broken wire repair method |
| CN106444116A (en) * | 2016-11-21 | 2017-02-22 | 惠科股份有限公司 | Liquid crystal panel, liquid crystal display and voltage compensation method of liquid crystal panel |
| TWI726679B (en) * | 2020-04-13 | 2021-05-01 | 友達光電股份有限公司 | Display apparatus |
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| US20070035491A1 (en) * | 2005-08-11 | 2007-02-15 | Shyh-Feng Chen | Display device |
| US20070139342A1 (en) * | 2005-12-16 | 2007-06-21 | Au Optronics Corp. | Circuit for amplifying a display signal to be transmitted to a repair line by using a non-inverting amplifier and LCD device using the same |
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| CN1797141A (en) * | 2004-12-20 | 2006-07-05 | 凌阳科技股份有限公司 | LCD device of thin film transistor possessing function of restoring disconnection, and detection circuit with high impedance |
| US20070035491A1 (en) * | 2005-08-11 | 2007-02-15 | Shyh-Feng Chen | Display device |
| US20070139342A1 (en) * | 2005-12-16 | 2007-06-21 | Au Optronics Corp. | Circuit for amplifying a display signal to be transmitted to a repair line by using a non-inverting amplifier and LCD device using the same |
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Effective date of registration: 20120426 Address after: Miaoli County, Taiwan, China Applicant after: Chimei Optoelectronics Co., Ltd. Address before: Tainan County, Taiwan, China Applicant before: Chimei Optoelectronics Co., Ltd. |
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