CN101561984B - Plane display panel - Google Patents
Plane display panel Download PDFInfo
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- CN101561984B CN101561984B CN2008100927746A CN200810092774A CN101561984B CN 101561984 B CN101561984 B CN 101561984B CN 2008100927746 A CN2008100927746 A CN 2008100927746A CN 200810092774 A CN200810092774 A CN 200810092774A CN 101561984 B CN101561984 B CN 101561984B
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Abstract
The invention provides a plane display panel which comprises a base plate, a first driving line, a second driving line and a static protecting circuit, wherein the static protecting circuit is arranged around the base plate and comprises a first cross circuit, a second cross circuit and a first static discharging and protecting element, the first cross circuit crosses the first driving line in a first cross position, the second cross circuit crosses the second driving line in a second cross position, the first static discharging and protecting element is electrically connected with the first cross circuit and the second cross circuit, and therefore, the plane display panel can avoid the leakage current caused by the damage of the first or second cross position.
Description
Technical field
The invention relates to a kind of flat-panel screens, and particularly relevant for a kind of two-d display panel with static discharge (Electronic Static Discharge is called for short ESD) protection circuit.
Background technology
In the daily life environment, the phenomenon of ESD is seen everywhere.Basically, because electronics for the affinity difference of various objects, so separate after any two objects contact, just is easy to produce the phenomenon that electric charge shifts between object again, cause the accumulation of static.In case the phenomenon of moment electric charge transfer during when the object touching of this static electrification or near another object different with its current potential, just can take place to a certain degree in the buildup of static electricity in the object, promptly is so-called ESD.
Particularly, electronic product make, produce, assemble, transport in addition the use of consumer after buying in, the possibility that is subjected to the ESD injury is very high.Therefore, electronic product must possess the protection design of ESD, can effectively prolong its serviceable life.Especially utilize the product of sophisticated semiconductor processing procedure made, as integrated circuit (IC), flat-panel screens etc., because its element is small-sized, therefore when element is subjected to the ESD of instant high-voltage, the circuit of integrated circuit or flat-panel screens inside is very easily permanently damaged, and causes component failure.
In present flat-panel screens, the ESD phenomenon can make flat-panel screens origination point defective (DotDefect) or line defect situations such as (Line Defect).In the manufacture process of flat-panel screens, owing to the ESD phenomenon also can't be avoided fully, therefore, the infringement that prior art regular meeting utilizes the esd protection circuit in the flat-panel screens to avoid the ESD phenomenon to be caused.In present flat-panel screens, common esd protection circuit is to be interior esd protection ring (Inner Short Ring is called for short ISR).
Fig. 1 is the synoptic diagram of existing a kind of esd protection circuit.Please refer to Fig. 1, two-d display panel 10 has comprised substrate 70, a plurality of pixel cell (with pixel cell 60 expressions), drive wire 40,42, esd protection element 20 and electrostatic defending circuit 30. Drive wire 40,42 couples driving circuit 80, drive wire 40,42 for example is data-driven line or turntable driving line, in order to drive signal is supplied with the pixel cell 60 of two-d display panel 10, and driving circuit 80 for example is data drive circuit or scan drive circuit, so as to drive signal is provided.Pixel cell 60 is disposed at the viewing area 72 of substrate 70, in order to present video pictures.It should be noted that only to show the one drive wire that each pixel cell 60 is coupled among Fig. 1, in fact pixel cell 60 should couple two drive wires, is respectively data-driven line and turntable driving line.
Hold above-mentionedly, esd protection element 20 and electrostatic defending circuit 30 are disposed at the non-display area 71 of substrate 70.When drive wire 40 receives voltage greater than critical voltage (or claim starting potential) (Threshold voltage) Vth; esd protection element 20 is a conducting state; via electrostatic defending circuit 30, with static dissipation, wherein electrostatic defending circuit 30 can claim static to discharge ring (Short Ring) again.When drive wire 40 produces high-tension static, the pixel cell 60 nonvolatil damages that may cause drive wire 40 to be coupled.And esd protection element 20 just with above-mentioned high-tension electrostatic guide to electrostatic defending circuit 30.So, pixel cell 60 just can not be subjected to the destruction of static.
Yet the above-mentioned practice but has another important disadvantages, the cross-over connection place 50 as easy as rolling off a log electrostatic breakdowns that are subjected to of drive wire 40 and electrostatic defending circuit 30 just, and then cause drive wire 40 and the 30 mutual conductings of electrostatic defending circuit.In case drive wire 40 and the 30 mutual conductings of electrostatic defending circuit, 10 situations that leakage current can take place of two-d display panel.This kind situation will cause the pixel cell 60 that is coupled on the drive wire 40 can't show normal color range and brightness.
Fig. 2 is the synoptic diagram of existing a kind of esd protection circuit generation leakage current.Please refer to Fig. 2, hypothesis driven circuit 80 sees through drive wire 40 drive signal (electric current I is provided
1) so as to driving pixel cell 60.But cross-over connection place 50 makes drive wire 40 and the 30 mutual conductings of electrostatic defending circuit because of electrostatic breakdown.So electric current I
1Have part electric current Δ I
1Leak to electrostatic defending circuit 30, cause drive wire 40 only to left in electric current I
1-Δ I
1Can be supplied to pixel cell 60.From the angle of voltage, supposing to see through drive wire 40 provides drive signal (voltage V
1) so as to driving pixel cell 60.But cross-over connection place 50 makes drive wire 40 and the 30 mutual conductings of electrostatic defending circuit because of electrostatic breakdown.So voltage V
1Influenced by electrostatic defending circuit 30 and reduce.Pixel cell 60 also just can't show normal color range and brightness certainly.Moreover, due to leakage current Δ I
1Usually all quite big, so can cause two-d display panel 10 to have the problem of line defect.Thus, can badly influence the value of flat-panel screens.
Summary of the invention
The invention provides a kind of two-d display panel, to avoid producing line defect.
The present invention proposes a kind of two-d display panel, comprises substrate, first drive wire, second drive wire and electrostatic defending circuit.Substrate disposes a plurality of pixel cells.First drive wire is disposed on the substrate, and the coupling pixel cell.Second drive wire is disposed on the substrate, and the coupling pixel cell.The electrostatic defending line configuring is around substrate, and the electrostatic defending circuit comprises first acrossing the line, second acrossing the line and first electric static discharge protector.First acrossing the line is across first drive wire.Second acrossing the line is across second drive wire.First electric static discharge protector electrically connects first acrossing the line and second acrossing the line.
In one embodiment of this invention, first drive wire couples driving circuit, and first drive wire comprises first transmission line and second transmission line.First end of first transmission line couples driving circuit, and second end of first transmission line couples node, and this node coupling pixel cell is so as to transferring to the partial pixel unit with the drive signal that driving circuit provided.Second transmission line is parallel to first transmission line.
In one embodiment of this invention, first drive wire is parallel to second drive wire.In another embodiment, first, second drive wire is disposed at first plane, and the electrostatic defending line configuring is in second plane, and first plane is different planes with second plane.In addition, ESD protection circuit more can comprise second electric static discharge protector, and first end of second electric static discharge protector couples first drive wire, and second end of second electric static discharge protector couples the electrostatic defending circuit.
In one embodiment of this invention, first electric static discharge protector can comprise diode, thin film transistor (TFT), electric capacity, or resistance.
The present invention is because of adopting the electrostatic defending circuit, and it comprises first acrossing the line, second acrossing the line and first electric static discharge protector.First acrossing the line and second acrossing the line are respectively across first drive wire and second drive wire.First electric static discharge protector electrically connects first acrossing the line and second acrossing the line.Thus, can avoid the generation of leakage current.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 is the synoptic diagram of existing a kind of esd protection circuit.
Fig. 2 is the synoptic diagram of existing a kind of esd protection circuit generation leakage current.
Fig. 3 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the first embodiment of the present invention.
Fig. 4 is the synoptic diagram that prevents leakage current according to a kind of esd protection circuit of the first embodiment of the present invention.
Fig. 5 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the second embodiment of the present invention.
Fig. 6 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the third embodiment of the present invention.
The main element symbol description:
10,11,12,13: two-d display panel
20,24:ESD protecting component
21,22: acrossing the line
30,31: the electrostatic defending circuit
40,42: drive wire
50,52: cross-over connection place
60: pixel cell
70: substrate
71: non-display area
72: the viewing area
80: driving circuit
90,91: node
401,402,421,422: transmission line
I
1, Δ I
1: electric current
V
1: voltage
Embodiment
Fig. 3 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the first embodiment of the present invention.Please refer to Fig. 3, two-d display panel 11 is that example describes with the liquid crystal display panel of thin film transistor.In another embodiment, two-d display panel 11 also can be an organic LED display panel.Two-d display panel 11 comprises substrate 70, drive wire 40,42 and electrostatic defending circuit 31.The viewing area 72 of substrate 70 disposes a plurality of pixel cells (representing with pixel cell 60). Drive wire 40,42 is disposed on the substrate 70, and couples driving circuit 80 and pixel cell 60.
Hold above-mentionedly, driving circuit 80 is an example with the data drive circuit, and drive wire 40,42 is that example describes with the data-driven line.In another embodiment, driving circuit 80 can be a scan drive circuit also, and drive wire 40,42 also can be the turntable driving line.
On the other hand, electrostatic defending circuit 31 be disposed at substrate 70 around, for example be the non-display area 71 that is configured in substrate 70.Electrostatic defending circuit 31 comprises esd protection element 20 and acrossing the line 21,22.Acrossing the line 21,22 respectively across drive wire 40,42 in cross-over connection place 50 and 52, wherein acrossing the line 21,22 is a good conductor.Esd protection element 20 electrically connects acrossing the line 21,22.In addition, in the present embodiment, drive wire 40,42 is configurable in same plane, and electrostatic defending circuit 31 is then configurable in another plane.
In the present embodiment, electrostatic defending circuit 31 is in order to release electrostatic.When a termination of esd protection element 20 was received voltage greater than critical voltage Vth, esd protection element 20 was conducting state, so as to release electrostatic.Electrostatic defending circuit 31 can be suspension joint (Floating) state.
Usually know that in order to allow this area have the knowledgeable can understand spirit of the present invention and the above-mentioned two-d display panel of giving an example 11 of arranging in pairs or groups, the esd protection element 20 of this embodiment illustrates present embodiment as an example with thin film transistor (TFT) especially.Esd protection element 20 has many different embodiments, for example diode, electric capacity, resistance or said elements and other combination of elements ... or the like, so the present invention should not be defined in this kind specific embodiment.
Accept above-mentionedly, Fig. 4 is the synoptic diagram that prevents leakage current according to a kind of esd protection circuit of the first embodiment of the present invention.Please merge with reference to Fig. 3 and Fig. 4, cross-over connection place 50 of two-d display panel 11 of hypothesis Fig. 3 suffers that ESD destroys among Fig. 4, and makes drive wire 40 and acrossing the line 21 mutual conductings.This moment, (voltage was V if drive wire 40 provides drive signal again
1) to pixel cell 60.Because voltage V
1Belong to general voltage, even voltage V
1Greater than the critical voltage Vth of esd protection element 20, but leakage current is also not too large.So (voltage is V to drive signal
1) can't be subjected to electrostatic defending circuit 31 influence and reduce.In other words, though drive wire 40 and acrossing the line 21 mutual conductings, pixel cell 60 still can present normal color range and brightness.Thus, 11 of two-d display panels can be avoided being subjected to ESD destruction and cause line defect.Moreover, when once more ESD taking place, 20 of esd protection elements can conducting, and then ESD is dissipated to whole plane display panel 11, suffers that with the pixel cell 60 of avoiding drive wire 40 to be coupled ESD destroys.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes embodiment according to the teaching of spirit of the present invention and aforementioned all embodiment.For example, Fig. 5 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the second embodiment of the present invention.Please refer to Fig. 5, label person same as the previously described embodiments can be with reference to not repeating them here with reference to the embodiment of the foregoing description.The esd protection element 24 of having it should be noted that two-d display panel more than 12 in the present embodiment, its first end couples drive wire 40, and its second end couples electrostatic defending circuit 31.The benefit of this practice is, can avoid ESD to destroy drive wire 40,42 pixel cells that coupled 60 by esd protection element 24.Moreover, present embodiment utilizes esd protection element 20 more can avoid cross-over connection place 50,52 to suffer that ESD destroys and causes the generation of leakage current simultaneously.
The present technique field has knows also visual its demand of the knowledgeable usually, and changes embodiment according to the teaching of spirit of the present invention and aforementioned all embodiment.For example, Fig. 6 is a kind of synoptic diagram with two-d display panel of esd protection circuit according to the third embodiment of the present invention.Please refer to Fig. 6, label person same as the previously described embodiments can be with reference to not repeating them here with reference to the embodiment of the foregoing description.What deserves to be mentioned is that the drive wire 40 of two-d display panel 13 has comprised transmission line 401,402.First end of transmission line 401 and second end couple driving circuit 80 and node 90 respectively, transfer to node 90 in order to the drive signal that driving circuit 80 is provided.402 of transmission lines are parallel to transmission line 401.Node 90 couples pixel cell 60, in order to compile drive signal, so as to driving pixel cell 60.
Hold above-mentionedly, in the present embodiment, the benefit that drive wire 40 comprises transmission line 401,402 is, when broken string took place for one of them when transmission line 401,402, drive wire 40 still can transfer to the drive signal of driving circuit 80 pixel cell 60 that drive wire 40 is coupled.In like manner can analogize drive wire 42 and also can comprise transmission line 421,422 and node 91, remainder then will not be given unnecessary details at this.Thus, not only can disperse drive wire that the risk of broken string takes place, more can avoid cross-over connection place 50,52 to suffer that ESD destroys and causes leakage current.In addition, also drive wire can be divided into more transmission line, the risk of broken string takes place so as to further dispersion drive wire.
In sum, therefore the present invention can avoid the generation of leakage current because of adopting the electrostatic defending circuit.In addition, embodiments of the invention have following advantage at least:
1. the electrostatic defending circuit comprises first acrossing the line, second acrossing the line and first electric static discharge protector.First acrossing the line and second acrossing the line are respectively across first drive wire and second drive wire.First electric static discharge protector electrically connects first acrossing the line and second acrossing the line.Thus, can avoid the acrossing the line of drive wire and electrostatic defending circuit to suffer that electrostatic breakdown causes the generation of leakage current.
2. the electric static discharge protector that is coupled between drive wire and the electrostatic defending circuit is used in collocation, can avoid static discharge to destroy the interior pixel cell of two-d display panel.
3. the drive wire of the transmission line comprise many parallel connections is used in collocation, and each transmission line comes together in same node, and the transmission line that can avoid part broken string takes place and the mistake that causes drive signal to transmit.
4. a plurality of electric static discharge protectors of configuration on the electrostatic defending circuit can be avoided more drive wire generation leakage current.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (5)
1. two-d display panel comprises:
One substrate disposes a plurality of pixel cells;
One first drive wire is disposed on this substrate, and those pixel cells of coupling;
One second drive wire is disposed on this substrate, and those pixel cells of coupling; And
One electrostatic defending circuit, be disposed at this substrate around, this electrostatic defending circuit comprises:
One first acrossing the line across this first drive wire, and does not directly electrically connect this first drive wire;
One second acrossing the line across this second drive wire, and does not directly electrically connect this second drive wire; And
One first electric static discharge protector electrically connects this first acrossing the line and this second acrossing the line.
2. two-d display panel as claimed in claim 1 is characterized in that, this first drive wire couples one drive circuit, and this first drive wire comprises:
One first transmission line, first end of this first transmission line couples this driving circuit, second end of this first transmission line couples a node, and these those pixel cells of node coupling are so as to transferring to the drive signal that this driving circuit provided those pixel cells of part; And
One second transmission line is parallel to this first transmission line.
3. two-d display panel as claimed in claim 1 is characterized in that, this first, second drive wire is disposed at one first plane, and this electrostatic defending line configuring is in one second plane, and this first plane is different planes with this second plane.
4. two-d display panel as claimed in claim 1 is characterized in that also comprising:
One second electric static discharge protector, first end of this second electric static discharge protector couples this first drive wire, and second end of this second electric static discharge protector couples this electrostatic defending circuit.
5. described two-d display panel as claimed in claim 1 is characterized in that, this first electric static discharge protector comprises diode, thin film transistor (TFT), electric capacity or resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100927746A CN101561984B (en) | 2008-04-16 | 2008-04-16 | Plane display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100927746A CN101561984B (en) | 2008-04-16 | 2008-04-16 | Plane display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101561984A CN101561984A (en) | 2009-10-21 |
| CN101561984B true CN101561984B (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100927746A Active CN101561984B (en) | 2008-04-16 | 2008-04-16 | Plane display panel |
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| Country | Link |
|---|---|
| CN (1) | CN101561984B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI667780B (en) * | 2018-08-02 | 2019-08-01 | 友達光電股份有限公司 | Display panel |
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- 2008-04-16 CN CN2008100927746A patent/CN101561984B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101561984A (en) | 2009-10-21 |
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Effective date of registration: 20160812 Address after: The Marshall Islands Majuro Adger Island Road trust company Tektronix Tektronix Adger areas MH96960 Patentee after: Hao Chi intangible asset management Investment Limited Address before: Taiwan, Taipei, China Zhongshan North Road three paragraph twenty-two Patentee before: Chunghwa Picture Tubes Ltd. |
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Effective date of registration: 20161230 Address after: 430000 Hubei City, Wuhan Province, East Lake Development Zone, high tech Avenue, No. 666 biological city C5 building, Patentee after: Wuhan Hua Xing photoelectricity technology corporation, Ltd. Address before: The Marshall Islands Majuro Adger Island Road trust company Tektronix Tektronix Adger areas MH96960 Patentee before: Hao Chi intangible asset management Investment Limited |