CN101145331A - Liquid crystal display, driving circuit and its connection repair method - Google Patents
Liquid crystal display, driving circuit and its connection repair method Download PDFInfo
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- CN101145331A CN101145331A CNA2007101881336A CN200710188133A CN101145331A CN 101145331 A CN101145331 A CN 101145331A CN A2007101881336 A CNA2007101881336 A CN A2007101881336A CN 200710188133 A CN200710188133 A CN 200710188133A CN 101145331 A CN101145331 A CN 101145331A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004973 liquid crystal related substance Substances 0.000 title abstract 2
- 230000008439 repair process Effects 0.000 title description 18
- 230000005540 biological transmission Effects 0.000 claims description 23
- 239000011521 glass Substances 0.000 claims description 20
- 239000000758 substrate Substances 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 11
- 238000004093 laser heating Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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Abstract
本发明公开了一种具有修补功能的液晶显示器、驱动电路及其连接修补方法。此种驱动电路包含多条信号线以及多级驱动器。该驱动器依照一顺序串接设置，并耦接至该信号线。各该驱动器具有第一放大器及第二放大器。各该第一放大器及各该第二放大器具有一输入端及一输出端。各该驱动器之第一放大器之输入端，适以依该顺序，耦接至后一驱动器的第一放大器的输入端。各该驱动器的第二放大器，适以依该顺序，耦接至后一驱动器的第二放大器的输入端。
The invention discloses a liquid crystal display with repairing function, a driving circuit and a connection repairing method thereof. This driving circuit includes multiple signal lines and multi-level drivers. The driver is serially arranged in a sequence and coupled to the signal line. Each driver has a first amplifier and a second amplifier. Each of the first amplifier and each of the second amplifier has an input terminal and an output terminal. The input terminal of the first amplifier of each driver is adapted to be coupled to the input terminal of the first amplifier of the subsequent driver in that order. The second amplifier of each driver is adapted to be coupled in that order to the input of the second amplifier of the next driver.
Description
Technical field
The present invention relates to a kind of LCD, driving circuit and connection method for repairing and mending thereof, relate in particular to a kind of LCD, driving circuit and patch cord method of attachment thereof with serial connection driver.
Background technology
The driver of the LCD of prior art (Driver), the transmission of its signal is with outside printing-type circuit board (Print Circuit Board, PCB) signal is by flexible printer circuit (Flex PrintCircuit, FPC) be transferred to the driver that is positioned on the panel after, signal can pass to drivers at different levels in regular turn, because legacy drive is to be produced on the printed circuit board (PCB), so its patch cord (Rescue Line) is to adopt the copper cash design.
See also Fig. 1, it describes to be applicable to a glass substrate 193 of LCD, and this glass substrate 193 comprises a viewing area 190, scan driving circuit 191 and a data drive circuit 192.When directly being incorporated into driver 100,110,120 on the glass substrate 193 in order to save cost at present, its patch cord just must adopt the film wire 130,140 on the glass substrate, yet the resistance value of film wire is much larger than copper cash, therefore can cause the signal attenuation of transmission, and then cause repairing quality to reduce.Particularly under the trend of big panel now, the problem of signal attenuation is with even more serious.In addition, regular meeting uses laser to carry out the welding repairing in the time of repairing, makes welding point 150,160 can increase the resistance of film wires.In traditional patch cord design, each signal of being repaired can be admitted to amplifier (Operational Ampiifier, OP) carrying out signal in 101,102,111,112,121,122 amplifies, but this grade amplifier need drive the whole piece patch cord, its driving force is more inadequate under the trend of big panel, simultaneously owing to only use single amplifier, and therefore its state that still is in running of remaining amplifier can cause redundant power consumption.
In sum, in the industry cycle be badly in need of a kind of more efficient mode at present, be integrated in the online of driver on the glass substrate with repairing.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of LCD with patch cord function, can reduce the impedance of repairing circuit, the power consumption that can avoid amplifier to cause simultaneously.
Another object of the present invention is to provide a kind of driving circuit, can reduce the impedance of repairing circuit, the power consumption that can avoid amplifier to cause simultaneously with mending function.
Another object of the present invention provides a kind of online method for repairing and mending of driver, repairs the problem that the driving circuit broken string causes signal to transmit, to improve the yield of product.
For achieving the above object, the invention provides a kind of LCD of tool patch cord function, it comprises that glass substrate, multi-strip scanning linearly are formed on this glass substrate, many data lines are formed on this glass substrate, a plurality of pixel is formed at this sweep trace and this data line intersection part and multistage driver are formed on this glass substrate.Aforementioned drives is according to order serial connection and in order to drive pixel each other.Each driver includes first amplifier and second amplifier, and each first amplifier and each second amplifier have an input end and an output terminal respectively.The output terminal of first amplifier of each driver is suitable with according to this order, is coupled to first amplifier input terminal of rear drive device.The output terminal of second amplifier of each driver is suitable with according to this order, is coupled to second amplifier input terminal of back one driver.
And for achieving the above object, the present invention provides a kind of driving circuit of tool patch cord function in addition, and it has many signal line and multistage driver.Aforementioned drives is connected in series each other according to an order and is provided with, and is coupled to this signal wire.Each driver includes first amplifier and second amplifier, and respectively this first amplifier and respectively this second amplifier have input end and output terminal respectively.The output terminal of first amplifier of each driver is suitable with according to this order, is coupled to first amplifier input terminal of back one driver.The output terminal of second amplifier of each driver is suitable with according to this order, is coupled to second amplifier input terminal of back one driver.
The present invention provides a kind of online method for repairing and mending of a plurality of drivers in addition, this driver is according to order serial connection setting each other, respectively this driver comprises first amplifier and second amplifier, respectively this first amplifier has input end and output terminal, respectively this second amplifier has input end and output terminal, respectively the output terminal of first amplifier of this driver electrically connects with first amplifier input terminal of back one driver, and respectively the output terminal of second amplifier of this driver electrically connects with second amplifier input terminal of back one driver.This method comprises the following step: the output terminal of first amplifier of connection afterbody driver and first amplifier input terminal of this first order driver are to form first loop; The output terminal of second amplifier of connection afterbody driver and second amplifier input terminal of this first order driver are to form second loop; And connect first amplifier input terminal of this driver respectively and this second amplifier input terminal wherein one with this first loop and this second loop one of them.
Adopt the present invention, can be in efficient mode, repair the online of the driver that is integrated on the glass substrate.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 describes the framework of the employing film wire of prior art when patch cord;
Fig. 2 A describes LCD of the present invention;
Fig. 2 B describes the detailed block diagram of driver;
Fig. 3 describes repairing mechanism of the present invention; And
Fig. 4 describes repairing flow process of the present invention.
Wherein, Reference numeral:
100,110,120: driver 130,140: film wire
150,160: welding point 190: viewing area
191: scan drive circuit 192: data drive circuit
193 glass substrates 101,111,121: the first amplifiers
102,112,122: the second amplifiers 200: glass substrate
201a, 201b, 201c: driver 24: scan drive circuit
25: data drive circuit 241,242,243: sweep trace
251,252,253: data line
211,212,213,214,215,216,217,218,219: pixel
204a, 204b, 204c: first amplifier
205a, 205b, 205c: second amplifier
206a, 206b, 206c: first input pin
207a, 207b, 207c: second input pin
308: the lead that desire is cut off
309: the welding point
Embodiment
Fig. 2 A describes the preferred embodiment of the LCD of tool preparing structure of the present invention.LCD 2 comprises glass substrate 200, multi-strip scanning line 241,242,243, many data lines 251,252,253, scan drive circuit 24, multistage driver 201a, 201b, 201c and a plurality of pixels 211,219 and is formed at sweep trace 241,242,243 and data line 251,252,253 intersection parts, and wherein driver 201a, 201b, 201c are coupled to data line 251,252,253 respectively.Sweep trace 241,242,243, data line 251,252,253 and multistage driver 201a, 201b, 201c directly are formed on this glass substrate 200 or adopt crystal grain-glass, and (Chip on Glass COG) is bonded on the glass substrate.In present embodiment, respectively this driver is a data driver, so this driver 201a, 201b, 201c can form data drive circuit 25. Driver 201a, 201b, 201c and scan drive circuit 24 are in order to drive pixel 211,219.Be stressed that the number of the number of sweep trace, the number of data line and pixel is not to be used for limiting the scope of the invention only for illustrating.
Fig. 2 B is the detailed block diagram of driver 201a, 201b, 201c.In present embodiment, driver 201a, 201b, 201c are according to order serial connection setting each other, and this sequential definition driver 201a is that the first order, driver 201b are that the second level and driver 201c are afterbody.This has a recurrence relation in proper order, and for example driver 201b is back of driver 201a, and driver 201c is back of driver 201b, and driver 201a is after the driver 201c one.
Connection relationship between driver 201a, 201b, 201c then is described.The output terminal of first amplifier of each grade driver 201a, 201b, 201c is docile and obedient preface, is coupled to first amplifier input terminal of back one-level driver, or rather, is coupled to first input pin that electrically connects with input end; Similarly, the output terminal of second amplifier of each grade driver also is docile and obedient preface, is coupled to second amplifier input terminal of back one-level driver, or rather, is coupled to second input pin that electrically connects with input end.
Particularly, the output terminal of the first amplifier 204a of driver 201a through the first input pin 206b of driver 201b, is coupled to the input end of the first amplifier 204b of driver 201b; The output terminal of the first amplifier 204b of driver 201b by the first input pin 206c of driver 201c, is coupled to the input end of the first amplifier 204c of driver 201c; The output terminal of the first amplifier 204c of driver 201c by the first input pin 206a of driver 201a, is coupled to the input end of the first amplifier 204a of driver 201a.In like manner, the output terminal of the second amplifier 205a of driver 201a by the second input pin 207b of driver 201b, is coupled to the input end of the second amplifier 205b of driver 201b; The output terminal of the second amplifier 205b of driver 201b by the second input pin 207c of driver 201c, is coupled to the input end of the second amplifier 205c of driver 201c; The output terminal of the second amplifier 205c of driver 201c by the second input pin 207a of driver 201a, is coupled to the input end of the second amplifier 205a of driver 201a.
What deserves to be mentioned is that the input end of the first amplifier 205a of the output terminal of the first amplifier 205c of afterbody driver (being driver 201c) and first order driver (being driver 201a) utilizes transmission line 203 cross-over connections; The input end of the second amplifier 206a of the output terminal of the second amplifier 206c of afterbody driver (being driver 201c) and first order driver (being driver 201a) utilizes transmission line 202 cross-over connections.Simultaneously, the input end of the first amplifier 204a of driver 201a, 201b, 201c, 204b, 204c also with transmission line 202,203 cross-over connections; And the second amplifier 205a of driver 201a, 201b, 201c, the input end of 205b, 205c also with transmission line 202,203 cross-over connections.In present embodiment, aforesaid transmission line is the film transmission line.
Because first amplifier of the present invention and second amplifier adopt the serial connection mode to connect, when therefore whenever being transferred to the driver of next stage, repair signal all can be amplified by first amplifier or second amplifier.So can reduce repair signal because the higher problem that causes signal attenuation of film wire resistance.
See also Fig. 3, then describe when the film wire between driver 201a, 201b, 201c going wrong when causing signal down to transmit in succession, how present embodiment reaches the effect of reparation.Structure that Fig. 3 described and connection relationship are similar to Fig. 2 B.With driver 201b is example, when driver 201b can't hand down delivery signal again, can utilize laser heating to do welding the first amplifier 204b of driver 201b or input end and the transmission line 203 or 202 (being patch cord) of the second amplifier 205b this moment.In preferable enforcement aspect, the output terminal of the first amplifier 204c of the input end of the first amplifier 204b of driver 201b and afterbody driver (being driver 201c) can be electrically connected.Implement in the aspect in other, the output terminal of the second amplifier 205c of the input end of the second amplifier 205b of driver 201b and afterbody driver (being driver 201c) electrically connects.Among Fig. 3, the output terminal of the second amplifier 205c of the input end of the second amplifier 205b of driver 201b and afterbody driver (being driver 201c) is made electrically connect and is produced welding point 309.Because patch cord (being transmission line 202,203) electrically connects with system's (figure does not illustrate), therefore the exportable repair signal of system makes repair signal pass through patch cord (being transmission line 202,203) and enters among the first amplifier 204b or the second amplifier 205b.
Because the present invention adopts concatenation type design, so after repair signal enters amplifier, via amplifier repair signal is amplified earlier, again repair signal is done transmission toward the corresponding amplifier of next stage driver.Because the welding point that laser produced only appears at input end, therefore can avoid causing the problem of repair signal decay because of the laser welding mode causes the increase of film wire resistance.Simultaneously, after repair signal enters via the amplifier of certain one-level driver, this repair signal can be done transmission toward next stage, therefore the amplifier before this grade driver can be in idle state, therefore its lead that is connected with this grade can be cut off, the lead 308 of Fig. 3 for example, power consumption that so can step-down amplifier is to reach the purpose of saving the energy.What must emphasize in addition is, implements in aspect in other, if one comprise multistage driver in the scan drive circuit 24, then these drivers also can adopt the linking method of similar aforementioned drives 201a, 201b, 201c.Under this situation, each driver then is the one scan driver.
Fig. 4 is the online method flow of a plurality of drivers for the present invention repairs, and this flow process is applicable to the structure that Fig. 2 B and Fig. 3 are described.At first, execution in step S1 is connected respectively to the output terminal of first amplifier in the driver and second amplifier first input pin and second input pin of next stage; Then, execution in step S2 sets up first amplifier out of afterbody driver and first order amp.in to form first loop, and wherein this connected mode connects in the cross-over connection mode.Then, execution in step S3, the output terminal of second amplifier of connection afterbody driver and second amplifier input terminal of first order driver are to form second loop, and wherein this connected mode also is the connected mode of cross-over connection.
When needs are repaired, execution in step S4 then, connect first amplifier input terminal of each driver or second amplifier input terminal one of them and first loop and second loop one of them, and input repair signal.Among the step S4, preferable mode is that first amplifier input terminal and formed first loop of first amplifier are electrically connected, and second amplifier input terminal and formed second loop of second amplifier are electrically connected.Last execution in step S5 with untapped first amplifier before each driver or the connection break of second amplifier and this driver, avoids untapped amplifier to continue action.
Because the present invention adopts the mode of amplifier serial connection, so after repair signal enters amplifier, can be amplified continuously.Moreover owing to adopt the concatenation type Design of Amplifier, so the interface point of the output terminal of amplifier and film wire do not do the action of laser welding, so do not have the fusing point generation that causes the film wire resistance to change.Simultaneously, the concatenation type Design of Amplifier can be amplified repair signal, so the higher problem of bringing of film wire resistance also can be resolved by the present invention.Except that this, repair signal enters after the amplifier, and the follow-up amplifier of action that needs has only the following amplifiers at different levels of this grade driver, so the amplifiers at different levels before this grade amplifier, therefore all actions that need not amplify again, the power consumption of step-down amplifier significantly.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (18)
1. a LCD is characterized in that, comprises:
One glass substrate;
The multi-strip scanning line is formed on this glass substrate;
Many data lines are formed on this glass substrate;
A plurality of pixels are formed at this sweep trace and this data line intersection part; And
Multistage driver is formed on this glass substrate, and in order to drive this pixel, this driver is according to order serial connection setting each other, and respectively this driver comprises:
One first amplifier has an input end and an output terminal, and the output terminal of this first amplifier is suitable with according to this order, is coupled to first amplifier input terminal of back one driver;
One second amplifier has an input end and an output terminal, and the output terminal of this second amplifier is suitable with according to this order, is coupled to second amplifier input terminal of back one driver;
One first input pin electrically connects with this first amplifier input terminal; And
One second input pin electrically connects with this second amplifier input terminal;
Wherein, first input pin of the output terminal of this first amplifier and this driver of next stage electrically connects, and second input pin of the output terminal of this second amplifier and this driver of next stage electrically connects.
2. LCD according to claim 1 is characterized in that, respectively this driver is a data driver.
3. LCD according to claim 1 is characterized in that, respectively this driver is the one scan driver.
4. LCD according to claim 1, it is characterized in that, the output terminal of first amplifier of the afterbody driver of this driver and the output terminal of this second amplifier utilize a transmission line cross-over connection with first amplifier input terminal and this second amplifier input terminal of the first order driver of this driver respectively.
5. LCD according to claim 4 is characterized in that, respectively first amplifier input terminal of this driver and respectively second amplifier input terminal of this driver are with this transmission line cross-over connection.
6. according to claim 4 or 5 described LCD, it is characterized in that respectively this transmission line is a film transmission line.
7. according to claim 4 or 5 described LCD, it is characterized in that, do welding after respectively this amp.in and this transmission line utilize laser heating.
8. a driving circuit is characterized in that, comprises:
Many signal line; And
Multistage driver, according to order serial connection setting each other, this driver is coupled to this signal wire, and respectively this driver has:
One first amplifier has an input end and an output terminal, and this first amplifier input terminal is suitable with according to this order, is coupled to first amplifier input terminal of back one driver;
One second amplifier has an input end and an output terminal, and this second amplifier input terminal is suitable with according to this order, is coupled to second amplifier input terminal of back one driver;
One first input pin position electrically connects with this first amplifier input terminal; And
One second input pin position electrically connects with this second amplifier input terminal;
First input pin of the output terminal of this first amplifier and this driver of next stage electrically connects; Second input pin of the output terminal of this second amplifier and this driver of next stage electrically connects.
9. driving circuit according to claim 8 is characterized in that, respectively this signal wire is a data line, and respectively this driver is a data driver.
10. driving circuit according to claim 8 is characterized in that, respectively this signal wire is the one scan line, and respectively this driver is the one scan driver.
11. driving circuit according to claim 8, it is characterized in that, the output terminal of first amplifier of the afterbody driver of this driver and the output terminal of this second amplifier utilize a transmission line cross-over connection with first amplifier input terminal and this second amplifier input terminal of the first order driver of this driver respectively.
12. driving circuit according to claim 11 is characterized in that, respectively first amplifier input terminal of this driver and respectively second amplifier input terminal of this driver are with this transmission line cross-over connection.
13., it is characterized in that respectively this transmission line is a film transmission line according to claim 11 or 12 described driving circuits.
14. according to claim 11 or 12 described driving circuits, it is characterized in that, do welding after respectively this amp.in and this transmission line utilize laser heating.
15. the online method for repairing and mending of a plurality of drivers, this driver is provided with according to an order serial connection, respectively this driver comprises one first amplifier and one second amplifier, respectively this first amplifier has an input end and an output terminal, respectively this second amplifier has an input end and an output terminal, the output terminal of first amplifier of this driver respectively, electrically connect according to first amplifier input terminal of this order with the next stage driver, the output terminal of second amplifier of this driver respectively, electrically connect according to second amplifier input terminal of this order with the next stage driver, it is characterized in that this method comprises the following step:
(a) first amplifier input terminal of the output terminal of first amplifier of connection afterbody driver and this first order driver is to form one first loop;
(b) second amplifier input terminal of the output terminal of second amplifier of connection afterbody driver and this first order driver is to form one second loop; And
(c) connect first amplifier input terminal of this driver respectively and this second amplifier input terminal one of them and this first loop and this second loop one of them.
16. method according to claim 15 is characterized in that, respectively this driver is a data driver.
17. method according to claim 15 is characterized in that, respectively this driver is the one scan driver.
18. method according to claim 15 is characterized in that, after other was contained in step (c), laser blown is the step of the connecting line before this first amplifier or second amplifier respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101881336A CN100485770C (en) | 2007-11-09 | 2007-11-09 | Liquid crystal display, drive circuit and its connection and repairing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101881336A CN100485770C (en) | 2007-11-09 | 2007-11-09 | Liquid crystal display, drive circuit and its connection and repairing method |
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| Publication Number | Publication Date |
|---|---|
| CN101145331A true CN101145331A (en) | 2008-03-19 |
| CN100485770C CN100485770C (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007101881336A Active CN100485770C (en) | 2007-11-09 | 2007-11-09 | Liquid crystal display, drive circuit and its connection and repairing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689817A (en) * | 2021-09-03 | 2021-11-23 | Tcl华星光电技术有限公司 | Drive circuit and display device |
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2007
- 2007-11-09 CN CNB2007101881336A patent/CN100485770C/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113689817A (en) * | 2021-09-03 | 2021-11-23 | Tcl华星光电技术有限公司 | Drive circuit and display device |
| WO2023029083A1 (en) * | 2021-09-03 | 2023-03-09 | Tcl华星光电技术有限公司 | Drive circuit and display apparatus |
| CN113689817B (en) * | 2021-09-03 | 2023-08-01 | Tcl华星光电技术有限公司 | Driving circuit and display device |
| US12300138B2 (en) | 2021-09-03 | 2025-05-13 | Tcl China Star Optoelectronics Technology Co., Ltd. | Drive circuit and display apparatus |
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| Publication number | Publication date |
|---|---|
| CN100485770C (en) | 2009-05-06 |
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