CN101441336B - Liquid crystal display apparatus - Google Patents
Liquid crystal display apparatus Download PDFInfo
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- CN101441336B CN101441336B CN 200710170942 CN200710170942A CN101441336B CN 101441336 B CN101441336 B CN 101441336B CN 200710170942 CN200710170942 CN 200710170942 CN 200710170942 A CN200710170942 A CN 200710170942A CN 101441336 B CN101441336 B CN 101441336B
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Abstract
The invention relates to a LCD device and its repairing method. The LCD device includes a LCD provided with a plurality of datawires, a repairing wire crossed with the datawires and a flexible circuit board connected with one end of the datawires. A repairing signal wire crossed with the repairing wire is led out from the flexible circuit board. A signal base plate is connected with the flexible circuit board. A selection wire is formed corresponding to the repairing wire. A constant potential electrode layer overlapped with the selection wire is provided corresponding to the selection wire. The signal base plate is provided with a simulation selection switch. A selection signal generated from the selection wire is input to the simulation selection switch for selection. The LCD device and its repairing method can avoid the clamp of the repairing wires from each other and also avoid the influence of the residual disconnected repairing wires to the repairing bus.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator and restorative procedure thereof, particularly use the liquid crystal indicator and the restorative procedure thereof of analog selection switch.
Background technology
Traditional CRT monitor relies on the phosphor powder on the cathode-ray tube (CRT) emitting electrons bump screen to come display image, but the principle of liquid crystal display is then different fully.Usually, liquid crystal indicator (LCD) has (also claiming color membrane substrates) and infrabasal plate (also claiming array base palte), have each other certain intervals and mutually over against, be formed on two substrates a plurality of electrodes mutually over against, liquid crystal is clipped between upper substrate and the infrabasal plate, voltage is applied on the liquid crystal by the electrode on the substrate, thus then according to the voltage that acted on change the arrangement display image of liquid crystal molecule, because liquid crystal indicator is not launched light as mentioned above, it needs light source to come display image.Therefore, liquid crystal indicator has the backlight that is positioned at the liquid crystal panel back, thereby controls from backlight quantity of incident light display image according to the arrangement of liquid crystal molecule.Accompany glass substrate, colored filter, electrode, liquid crystal layer and thin film transistor (TFT) between two polaroids, liquid crystal molecule is the material with refractive index and dielectric constant anisotropy.The light process that backlight sends is polaroid down, becomes the polarized light with certain polarization direction.Institute's making alive between the transistor controls electrode, and this voltage acts on the polarization direction that liquid crystal is controlled polarized light, polarized light forms monochromatic polarized light after seeing through corresponding color film chromatograph, if polarized light can penetrate the upper strata polaroid, then demonstrates corresponding color; Electric field intensity difference, the deflection angle of liquid crystal molecule are also different, and the light intensity that sees through is different, and the brightness of demonstration is also different, and the combination of the different light intensity by three kinds of colors of RGB shows motley image.
In the manufacture process of actual product, the bad overall bad very big proportion that accounted for breaks.For the dose rate that improves production is normally repaired bad lead, in the array processes process, by chemical vapor deposition (Chemical Vapor Deposition, CVD) mode of Xiu Fuing is repaired broken string, semi-manufacture after becoming box then can't adopt the method, usually the discovery broken string is bad after becoming box all handles as defective products, increases the weight of cost burden.At present the product behind the one-tenth box is repaired and then adopted the reparation Wiring technology, to repairing line the broken string of LCDs inside is remedied, thereby reached the purpose that improves yield rate.As China Patent No. is the repair wire structure of the patent employing of CN200610109389.9 and CN200610117908.6: laser repairing equipment can be with the double layer of metal welding short circuit that overlaps, the data terminal upper and lower side overlaps with the reparation line, when broken string takes place, the corresponding data line upper and lower side passes through laser welding with the reparation line that overlaps with it, thereby data line upper and lower side signal is connected, plays the effect of repairing broken string.The effect of operational amplifier is that the signal that will import carries out shaping, and enough strong driving force is provided, with the reparation line of drive output.
Fig. 1 is the synoptic diagram of the liquid crystal indicator of first kind of restorative procedure of employing, and Fig. 2 is the flexible circuit board inner structure synoptic diagram among Fig. 1, and Fig. 3 is repair signal line and amplifier connection diagram.Fig. 1, Fig. 2, Fig. 3 have shown the restorative procedure of first kind of broken string, adopt the liquid crystal indicator of first kind of restorative procedure to comprise: a LCDs 103, have many data lines 3 in the LCDs 103, data line 3 one ends are connected with flexible circuit board 7, repairing line 2 intersects with data line 3, draw in the flexible circuit board 7 one with repair the repair signal line 6 that line 2 intersects, repair signal line 6 utilizes the formation of different layers metal with the reparation line 2 that its transverse direction intersects.When having data line that broken string takes place, the reparation line 2 that corresponding data line 3 and transverse direction are intersected passes through the laser welding short circuit in the part that overlaps, repair line 2 overlapping places 15 by the laser welding short circuit in addition with in repair signal line 6 and intersecting of transverse direction, drawing display screen 103 by repair signal line 6 when the signal that sends from flexible circuit board 7 enters in the LCDs 103 like this outputs in the chip for driving 4 as shown in Figure 2 the flexible circuit board 7, as shown in Figure 3, export reparation bus 1 on the signal substrate 102 after utilizing the operational amplifier 5 of the chip for driving 4 be positioned at flexible circuit board 7 that data line 3 output signals are carried out shaping and promoted driving force to.Wherein, comprise 8 repair signal pieces (Block) (RPL-SIG-1 to RPL-SIG-8) in the repair signal line 6, each repairs line signaling module and a corresponding amplifier 5 connections, and the output terminal of each amplifier 5 is connected with reparation bus 1.Repairing bus 1 is connected with each bar reparation line 2, reparation bus 1 by LCDs 103 peripheries will be reached on the reparation line 2 of LCDs lower end by the data-signal after shaping and the lifting driving force, by the laser welding short circuit data-signal is delivered to the corresponding broken string other end in the part that overlaps with the reparation line 2 that its transverse direction intersects by data line 3 lower ends that broken string takes place, thereby make all conductings up and down, reparation is finished.To cause output end signal locked and can't carry out driven when mode connects as shown in Figure 3 if will repair the output terminal of line, therefore common way is these signal ends not to be linked together, drive respectively, the result who causes like this is that to take resource many, and waste is serious.
Second kind of broken wire repair method and first kind of broken wire repair method are similar, as shown in Figure 4 and Figure 5, it is when data line 3 has broken string to take place, the reparation line 2 that corresponding data line 3 and its transverse direction are intersected passes through the laser welding short circuit in the part that overlaps, pass through the laser welding short circuit with the reparation line 2 overlapping places that intersect at repair signal line 6 and its transverse direction in addition, when entering in the LCDs 103, the signal that the chip for driving 4 from flexible circuit board 7 is sent draws LCDs 103 substrates by repair signal line 6, export to after by the operational amplifier on the signal substrate 102 5 data output signal being carried out shaping and promotes driving force then and repair line bus 1, wherein every the repair signal piece (RPL-SIG-1 to RPL-SIG-8) in the repair signal line 6 is connected with an end of repairing bus 1, and the other end of reparation bus 1 is connected with an amplifier 5 on the signal substrate.Reparation bus by the LCDs periphery reaches the LCDs lower end with data-signal, repair line by the data line of lower end with intersecting of transverse direction and by the laser welding short circuit data-signal is delivered to the corresponding broken string other end in the part that overlaps, thereby make all conductings up and down, reparation is finished.Second kind of broken wire repair method and first kind of broken wire repair method main difference part are: an operational amplifier 5 is positioned on the signal substrate 102, and this operational amplifier 5 is connected with every repair signal piece in the repair signal line 6.If the reparation line of correspondence is exported normal signal waveform in the time of will repairing the output terminal of line mode connects as shown in Figure 5, and the reparation line that other are repaired has negative effect to the data-signal of this input operational amplifier, may cause data-signal to postpone specifically, may introduce noise signal etc.Therefore generally need by cut off other not the reparation line of importation reduce above-mentioned influence, what this way caused is that operation is various, and makes mistakes easily, and is easy to bring otherwise influence.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of liquid crystal indicator and restorative procedure thereof, this liquid crystal indicator and restorative procedure thereof produce selects signal that the repair signal piece of repair signal line is selected, to get rid of the influence of other reparation line of repairing to the repair signal line.
For achieving the above object, the invention provides a kind of liquid crystal indicator, it comprises a LCDs, have many data lines in this LCDs, with the crossing reparation line of those data lines, a flexible circuit board that is connected with those data line one ends, draw a repair signal line crossing in this flexible circuit board with repairing line, a signal substrate that is connected with this flexible circuit board, its substantive distinguishing features is, corresponding described reparation line forms a selection wire, to a set potential electrode layer that overlaps with this selection wire should selection wire be set, have an analog selection switch on the described signal substrate, described selection wire generation selection signal is input to this analog selection switch the repair signal line is selected.
Preferably, described flexible circuit board also comprises a chip for driving, and this chip for driving is connected with described data line.
Preferably, described repair signal line utilizes the different metal layer to form with the reparation line that intersects.
Preferably, be provided with an insulation course between described selection wire and the set potential electrode layer.
Preferably, described repair signal line has eight repair signal pieces, the corresponding operational amplifier that is positioned on the chip for driving of each repair signal piece, and this operational amplifier is connected with described analog selection switch.
Preferably, described selection wire has eight and repairs terminal, and described selection wire is repaired terminal by these eight and is connected with described analog selection switch.
Preferably, be connected with a divider resistance, a drop-down resistance and a filter capacitor between described LCDs and the analog selection switch in turn, this pull down resistor is connected with reference to earth signal with the other end of this filter capacitor.
Preferably, described selection wire and analog selection switch are provided with a scrambler, and this scrambler is encoded to the selection signal that described selection wire produces.
Preferably, described analog selection switch also connects in an end of repairing bus, and this other end of repairing bus is connected with described reparation line.
Another technical scheme of the present invention provides a kind of restorative procedure of liquid crystal indicator, this liquid crystal indicator comprises a LCDs, have many data lines in this LCDs, with the crossing reparation line of those data lines, a flexible circuit board that is connected with those data line one ends, draw a repair signal line crossing in this flexible circuit board with repairing line, a signal substrate that is connected with this flexible circuit board, corresponding described reparation line forms a selection wire, to a set potential electrode layer that overlaps with this selection wire should selection wire be set, has an analog selection switch on the described signal substrate, described selection wire generation selection signal is input to this analog selection switch the repair signal line is selected, when having a data line that broken string takes place in this liquid crystal indicator, its restorative procedure may further comprise the steps: data line and its reparation line that intersects that broken string will take place pass through laser welding in the part that overlaps; The overlapping place of the reparation line that intersects at described repair signal line and its passes through laser welding; Selection wire and the described set potential electrode layer laser welding of repairing the line correspondence are carried out gating; Laser welding is passed through in the data line lower end of described reparation line and described broken string.
The present invention is owing to adopted above-mentioned technical scheme, make it compared with prior art, have following advantage and good effect: liquid crystal indicator of the present invention and restorative procedure thereof use one the tunnel to select signal controlling one tunnel to repair the line signal, avoided the mutual clamper of reparation line signal like this, avoided all the other not connect again and repaired line repairing the influence of bus
Description of drawings
Fig. 1 is the synoptic diagram of the liquid crystal indicator of first kind of restorative procedure of employing;
Fig. 2 is the flexible circuit board inner structure synoptic diagram among Fig. 1;
Fig. 3 is repair signal line and the amplifier connection diagram when adopting first kind of restorative procedure;
Fig. 4 is the synoptic diagram of the liquid crystal indicator when adopting second kind of restorative procedure;
Fig. 5 is repair signal line and the amplifier connection diagram when adopting second kind of restorative procedure;
Fig. 6 is the liquid crystal indicator first embodiment synoptic diagram of the present invention;
Fig. 7 is the flexible circuit board inner structure synoptic diagram among Fig. 6;
Fig. 8 is the synoptic diagram that repair signal line, reparation selection wire are connected with the analog selection switch;
Fig. 9 is the circuit diagram between LCDs and the analog selection switch;
Figure 10 is the restorative procedure schematic diagram of liquid crystal indicator first embodiment;
Figure 11 is the liquid crystal indicator second embodiment synoptic diagram of the present invention;
Figure 12 is the restorative procedure schematic diagram of liquid crystal indicator second embodiment.
Embodiment
Below with reference to accompanying drawing liquid crystal indicator of the present invention and restorative procedure thereof are described in further detail.
Fig. 6 is the liquid crystal indicator first embodiment synoptic diagram of the present invention, Fig. 7 is the flexible circuit board inner structure synoptic diagram among Fig. 6, as Fig. 6, shown in Figure 7, first embodiment of the present invention liquid crystal indicator mainly comprises: a LCDs 203, have many data lines 23 in this LCDs 203, has a chip for driving 24 in this flexible circuit board 27, chip for driving 24 in those data line 23 1 ends and the flexible circuit board 27 is connected, this flexible circuit board 27 is positioned at the outside of LCDs 203, the reparation line 22 that intersects with data line 23, draw in the flexible circuit board 27 one with repair the repair signal line 26 that line 22 intersects, this repair signal line 26 utilizes the formation of different layers metal with the reparation line 22 that its transverse direction intersects.As shown in Figure 7, the present invention also in traditional LCDs on the cabling basis corresponding each root repair line 22 and increase a selection wire 28, this selection wire 28 and a set potential electrode layer 30 parts overlap, have an insulation course to isolate between this set potential electrode layer 30 and the selection wire 28, this set potential electrode layer 30 is got the common electrode in the input LCDs in this example; If do not need the broken string repaired in this reparation unit, then selection wire 28 and set potential electrode layer 30 are without laser welding, when in the LCDs 203 broken string that need repair being arranged, make this selection wire 28 have the current potential same by laser welding, thereby allow the chip that links to each other with it can judge that this LCDs 203 has broken string and opens the corresponding simulating selector switch and carry out gating with set potential electrode layer 30.
Fig. 8 is the synoptic diagram that repair signal line, reparation selection wire are connected with the analog selection switch, as shown in Figure 8, one signal substrate 202, one analog selection switch 29 is set on signal substrate 202, this analog selection switch 29 and one is repaired bus 21 and is connected, selection wire 28 passes flexible circuit board 27 and is connected on the signal substrate 202, specifically, have 8 in the selection wire 28 and repair terminals (RPL-CON-1 to RPL-CON-8), selection wire 28 is repaired terminals by these 8 and is connected with analog selection switch 29 on the signal substrate 202; Repair signal line 26 has 8 repair signal pieces (RPL-SIG-1 to RPL-SIG-8), the corresponding operational amplifier 25 that is positioned on the chip for driving 24 of each repair signal piece, each operational amplifier 25 is connected with analog selection switch 29, exports signal substrate 202 through the operational amplifier 25 in the chip for driving 24 to through signal shaping with after amplifying.
In above-mentioned liquid crystal indicator, if when having data line that broken string takes place, its concrete restorative procedure is as follows: the reparation line 22 that data line 23 and its transverse direction of broken string intersected partly passes through the laser welding short circuit overlapping, pass through the laser welding short circuit with the reparation line 22 overlapping places 35 that intersect at repair signal line 26 and its transverse direction in addition, draw display screen 203 by repair signal line 26 when the signal that sends from flexible circuit board 27 enters in the LCDs 203 like this and output in the chip for driving 24 as shown in Figure 8 the flexible circuit board 27, and selection wire 28 and set potential electrode layer 30 laser weldings that will repair line 22 correspondences carry out gating.Being produced the selection signal by the selection wire 28 of gating is input in the analog selection switch 29, select by the repair signal piece in 28 pairs of inputs of this selection wire repair signal line 26, selecteed repair signal piece exports the signal of broken string to reparation line bus 21 through operational amplifier 25 signal shapings with after amplifying, repair line bus 21 at last signal is transferred to reparation line 22, pass through the laser welding short circuit by data line 23 lower ends that broken string will take place and the reparation line 22 that its transverse direction intersects in the part that overlaps, thereby repair the data line other end that line 22 is delivered to data-signal on corresponding broken string.Restorative procedure of the present invention by in the LCDs or signal substrate produce to select signal to come the repair signal piece of input is selected, to get rid of the influence of all the other irrelevant terminals.
Fig. 9 is the circuit diagram between LCDs 203 and the analog selection switch 29.Be connected with divider resistance 31, pull down resistor 32 and filter capacitor 33 between LCDs 203 and analog selection switch 29 in turn, pull down resistor 32 is connected with reference to earth signal 34 with the other end of filter capacitor 33.The effect of divider resistance 31 is that output signal voltage in the LCDs 203 is carried out dividing potential drop, to produce analog selection switch 29 corresponding signal voltages; The effect of pull down resistor 32 is not make to be in low level state by the selection wire 28 of gating; The effect of filter capacitor 33 is influences of filtering clutter, promotes the stability of signal.
When if the reparation line is less than three, then a scrambler is set at selection wire 28 and analog selection switch 29, as shown in figure 10,3 control signals of output after 8 selection signals that selection wire 28 produces are encoded through 74HC148 type scrambler 40, these 3 control signals are selected CD4051BC pattern plan selector switch 29 thus, repair the line signal simultaneously and are connected in the input end that the CD4051BC pattern is intended selector switch 29 by repair signal line 26.Thus, the one tunnel selects signal controlling one tunnel to repair the line signal, avoids repairing the mutual clamper of line signal, has avoided all the other not connect again and has repaired line to repairing the influence of bus.
Figure 11 is the liquid crystal indicator second embodiment synoptic diagram of the present invention, second embodiment and first example structure and principle are similar, itself and the first embodiment main difference part are: adopt three selection wires 28 among second embodiment, as shown in figure 12,3 tunnel control signals are intended selector switch 29 to the CD4051BC pattern and are selected, and repair the line signal simultaneously and are connected in the input end that the CD4051BC pattern is intended selector switch 29.Select the signal adjunct circuit as shown in Figure 9, select repairing line by three road selection wires coding of correspondence, the selection wire correspondence of gating is encoded to 1, and the selection wire of gating is not encoded to 0.Thus, the one tunnel selects signal controlling one tunnel to repair the line signal, avoids repairing the mutual clamper of line signal, has avoided all the other not connect again and has repaired line to repairing the influence of bus.
That more than introduces only is based on preferred embodiment of the present invention, can not limit scope of the present invention with this.Any device of the present invention or method are done replacement, the combination, discrete of step well know in the art, and the invention process step is done well know in the art being equal to change or replace and all do not exceed exposure of the present invention and protection domain.
Claims (6)
1. liquid crystal indicator, it comprises a LCDs, have many data lines in this LCDs, with the crossing reparation line of those data lines, a flexible circuit board that is connected with those data line one ends, draw a repair signal line crossing in this flexible circuit board with repairing line, a signal substrate that is connected with this flexible circuit board, it is characterized in that, corresponding described reparation line forms a selection wire, to a set potential electrode layer that overlaps with this selection wire should selection wire be set, have an analog selection switch on the described signal substrate, described selection wire produces to be selected signal to be input to this analog selection switch the repair signal line is selected; Described repair signal line has eight repair signal pieces, the corresponding operational amplifier that is positioned on the chip for driving of each repair signal piece, and this operational amplifier is connected with described analog selection switch; Described selection wire has eight and repairs terminal, and described selection wire is repaired terminal by these eight and is connected with described analog selection switch; Be connected with a divider resistance, a drop-down resistance and a filter capacitor between described LCDs and the analog selection switch in turn, this pull down resistor is connected with reference to earth signal with the other end of this filter capacitor.
2. liquid crystal indicator as claimed in claim 1 is characterized in that, this chip for driving is located in this flexible circuit board, and this chip for driving is connected with described data line.
3. liquid crystal indicator as claimed in claim 1 is characterized in that, described repair signal line utilizes the different metal layer to form with the reparation line that intersects.
4. liquid crystal indicator as claimed in claim 1 is characterized in that, is provided with an insulation course between described selection wire and the set potential electrode layer.
5. liquid crystal indicator as claimed in claim 1 is characterized in that, described selection wire and analog selection switch are provided with a scrambler, and this scrambler is encoded to the selection signal that described selection wire produces.
6. liquid crystal indicator as claimed in claim 1 is characterized in that, described analog selection switch also is connected with an end of repairing bus, and this other end of repairing bus is connected with described reparation line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710170942 CN101441336B (en) | 2007-11-23 | 2007-11-23 | Liquid crystal display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710170942 CN101441336B (en) | 2007-11-23 | 2007-11-23 | Liquid crystal display apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101441336A CN101441336A (en) | 2009-05-27 |
| CN101441336B true CN101441336B (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710170942 Active CN101441336B (en) | 2007-11-23 | 2007-11-23 | Liquid crystal display apparatus |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165521B (en) * | 2011-12-13 | 2015-06-03 | 上海华虹宏力半导体制造有限公司 | Method for repairing chip through laser |
| CN110045545B (en) * | 2019-05-17 | 2022-04-29 | 上海中航光电子有限公司 | Display device |
| CN113823216B (en) * | 2020-09-30 | 2022-09-23 | 荣耀终端有限公司 | Display device, driving chip and electronic equipment |
| US12232376B2 (en) | 2020-12-23 | 2025-02-18 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Display panel with repair structure and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1766703A (en) * | 2005-11-22 | 2006-05-03 | 友达光电股份有限公司 | Liquid crystal display device and its repair line structure |
| CN1797141A (en) * | 2004-12-20 | 2006-07-05 | 凌阳科技股份有限公司 | Thin film transistor liquid crystal display with disconnection function and high impedance detection circuit |
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2007
- 2007-11-23 CN CN 200710170942 patent/CN101441336B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797141A (en) * | 2004-12-20 | 2006-07-05 | 凌阳科技股份有限公司 | Thin film transistor liquid crystal display with disconnection function and high impedance detection circuit |
| CN1766703A (en) * | 2005-11-22 | 2006-05-03 | 友达光电股份有限公司 | Liquid crystal display device and its repair line structure |
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| CN101441336A (en) | 2009-05-27 |
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