CN102651188B - A kind of shift register, gate driver circuit and display device - Google Patents
A kind of shift register, gate driver circuit and display device Download PDFInfo
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- CN102651188B CN102651188B CN201110430803.7A CN201110430803A CN102651188B CN 102651188 B CN102651188 B CN 102651188B CN 201110430803 A CN201110430803 A CN 201110430803A CN 102651188 B CN102651188 B CN 102651188B
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Abstract
The invention discloses a kind of shift register, comprise the gate driver circuit of multi-stage shift register and comprise the display device of this gate driver circuit, described shift register comprises: an electric capacity, second switch unit, the 3rd switch element and drop-down unit, wherein, described second switch unit controls clock signal exports from signal output part, described 3rd switch element controls clock signal and outputs to subordinate's shift register, in order to trigger subordinate's shift register.Application the present invention, can ensure that every grade of shift register by triggered as normal, and then can ensure the stability and the reliability that comprise the gate driver circuit of multi-stage shift register.
Description
Technical field
The present invention relates to display field, particularly a kind of shift register, comprise the gate driver circuit of multi-stage shift register and comprise the display device of this gate driver circuit.
Background technology
Display technique development is in recent years very fast, and panel display apparatus has complete complanation, quality is light, thickness is thin and the feature such as power saving, meets the trend of future image display device development.Panel display apparatus main at present comprises plasma display panel (Plasma Display Panel, PDP), liquid crystal display (Liquid CrystalDisplay, LCD), Field Emission Display (Field Emission Display, FED), Organic Light Emitting Diode (Organic Light-Emitting Diode, OELD) display device and projection display equipment etc., wherein, LCD be with fastest developing speed, technology is the most ripe, application surface panel display apparatus the most widely.At present, most LCD arranges gate drivers and source electrode driver outside panel, in order to produce grid impulse signal and data-signal, but, the cost compare of this mode is high, thus create other alternative, such as, make the gate driver circuit be made up of shift register on the glass substrate.
Fig. 1 is the schematic diagram of the gate driver circuit of the shift register cascade adopted in prior art.Shown in Figure 1, existing gate driver circuit comprises multi-stage shift register, and wherein, intergrade shift register 12 comprises:
First switch element 121, is connected with higher level's shift register 10 carry signal output end;
One electric capacity 122, when described first switch element 121 receives carry signal conducting, carries out charging to provide a drive control voltage to second switch unit 123;
Second switch unit 123, switching manipulation is carried out under the control of described drive control voltage, thus control clock signal 11 exports to output terminal, described output terminal is used for providing signal to gate line 13, providing feedback signal and provide carry signal to subordinate's shift register 14 to higher level's shift register 10;
First drop-down unit 124, carries out switching manipulation under the control of subordinate's shift register 14 feedback signal, thus controls described electric capacity 122 ground connection and discharge;
Second drop-down unit 125, carries out switching manipulation, thus controls described output head grounding under the control of subordinate's shift register 14 feedback signal.
In this gate driver circuit, every grade of shift register only has an output terminal, not only gives gate line to provide signal, and provides feedback signal will to higher level's shift register, also will send carry signal to subordinate's shift register simultaneously.The duty factor that shift register cascade mode used in the prior art can make output terminal connect is larger, therefore, certain delay and decay is there will be close to the signal of square wave at output terminal when input end, in addition, the breadth length ratio of the transistor that control output end is used is comparatively large, and be in hundreds of to several thousand quantity ranks, technology controlling and process is more difficult, there will be other transistor characteristic to be easily deteriorated, also can have influence on the quality of output signal.The accumulation of these unfavorable factors, can cause follow-up shift register by triggered as normal, can not reduce gate driver circuit stability and reliability.
Summary of the invention
The embodiment of the present invention provides a kind of shift register, comprise the gate driver circuit of multi-stage shift register and comprise the display device of this gate driver circuit, in order to make every grade of shift register can by triggered as normal, ensure stability and the reliability of gate driver circuit, thus ensure stability and the reliability of display device.
A kind of shift register that the embodiment of the present invention provides comprises:
One electric capacity, is connected with trigger pip output terminal, carries out charging to provide a drive control voltage to second switch unit and the 3rd switch element under trigger pip controls;
Second switch unit, carries out switching manipulation under the control of described drive control voltage, thus control clock signal exports from signal output part;
3rd switch element, carries out switching manipulation under the control of described drive control voltage, thus control clock signal outputs to subordinate's shift register, in order to trigger subordinate's shift register;
Drop-down unit, carries out switching manipulation under the control of feedback signal, thus controls the output head grounding that described capacity earth carries out discharging and controlling described second switch unit and described 3rd switch element.
Described shift register also comprises:
First switch element, is connected with trigger pip output terminal, then
Described electric capacity, charges when described first switch element receives trigger pip conducting.
Described first switch element to comprise in field effect transistor and triode any one or combination; Described second switch unit to comprise in field effect transistor and triode any one or combination; Described 3rd switch element to comprise in field effect transistor and triode any one or combination.
When described first switch element comprises the first film transistor, and described second switch unit comprises the second thin film transistor (TFT), and when described 3rd switch element comprises the 3rd thin film transistor (TFT), then
The drain electrode of described the first film transistor is connected with trigger pip output terminal, and grid is connected with trigger pip output terminal, and source electrode is connected with described electric capacity;
The drain electrode of described second thin film transistor (TFT) is connected with clock signal output terminal, and grid is connected to receive described drive control voltage with described electric capacity, and source electrode is connected with signal output part;
The drain electrode of described 3rd thin film transistor (TFT) is connected with clock signal output terminal, and grid is connected to receive described drive control voltage with described electric capacity; Source electrode is connected to trigger subordinate's shift register with subordinate shift register.
Described drop-down unit comprises and pulling down switch and earth terminal; The described one end that pulls down switch is connected with described electric capacity, and is connected with the output terminal of described second switch unit, and is connected with the output terminal of described 3rd switch element, and the other end is connected with described earth terminal.
Described pulling down switch to comprise in field effect transistor and triode any one or combination.
When described pull down switch comprise pull-down thin film time, then
The drain electrode of described pull-down thin film is connected with described electric capacity, and be connected with the output terminal of described second switch unit, and be connected with the output terminal of described 3rd switch element, grid is connected in order to receiving feedback signals with feedback signal output, and source electrode is connected with described earth terminal.
A kind of gate driver circuit that the embodiment of the present invention provides comprises first order shift register, at least one intergrade shift register, afterbody shift register, first order shift register and intergrade shift register are the shift register in above-mentioned any one embodiment, wherein
First order shift register, for providing carry signal and provide signal to a gate line under the control of this gate driver circuit start signal and clock signal subordinate's shift register, and under the control of the feedback signal provided at subordinate's shift register, termination signal exports;
Intergrade shift register, comprise electric capacity, second switch unit, 3rd switch element and drop-down unit, wherein, described electric capacity is connected with the output terminal of higher level's shift register carry signal, described second switch unit is connected with clock signal output terminal with described 3rd switch element, the output terminal of described second switch unit is connected in order to provide feedback signal to higher level's shift register with higher level's shift register, the output terminal of described 3rd switch element is connected to trigger subordinate's shift register with subordinate shift register, described drop-down unit is connected to receive the feedback signal that subordinate's shift register provides with subordinate shift register, and the output terminal of described second switch unit is connected with gate line, in order to provide signal,
Afterbody shift register, for providing signal and provide feedback signal to higher level's shift register under the carry signal of higher level's shift register and the control of clock signal a gate line, and termination signal exports under the control of this gate driver circuit termination signal.
Described afterbody shift register is the shift register in above-mentioned any one embodiment.
A kind of display device that the embodiment of the present invention provides comprises gate driver circuit in above-described embodiment.
As seen through the above technical solutions, the shift register that the embodiment of the present invention provides comprises an electric capacity, second switch unit, the 3rd switch element and drop-down unit, wherein, described second switch unit controls clock signal exports from signal output part, described 3rd switch element controls clock signal and outputs to subordinate's shift register, in order to trigger subordinate's shift register.When gate driver circuit comprises above-mentioned shift register, then the signal output part of shift register connects gate line, in order to provide signal.Now, the signal that this grade of shift register provides and the carry signal triggering subordinate's shift register are transmitted separately, be independent of each other, ensure that the shift register of every grade can by triggered as normal, and then ensure that stability and the reliability of the gate driver circuit comprising multi-stage shift register, ensure that stability and the reliability of the display device comprising this gate driver circuit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the gate driver circuit of the shift register cascade adopted in prior art;
Fig. 2 is the schematic diagram of a specific embodiment of shift register provided by the invention;
Fig. 3 is the schematic diagram of the another specific embodiment of shift register provided by the invention;
Fig. 4 is the schematic diagram of a specific embodiment of gate driver circuit provided by the invention;
Fig. 5 is the schematic diagram of another specific embodiment of shift register provided by the invention;
Fig. 6 is the schematic diagram of another specific embodiment of gate driver circuit provided by the invention;
Fig. 7 is the signal waveforms of the gate driver circuit shown in Fig. 6.
Embodiment
The embodiment of the present invention provides a kind of displacement shift register to comprise: an electric capacity, second switch unit, the 3rd switch element and drop-down unit.
Below in conjunction with accompanying drawing, shift register provided by the invention is described in detail.
Fig. 2 is the schematic diagram of a specific embodiment of shift register provided by the invention, shown in Figure 2, and the embodiment of the present invention provides a kind of shift register 12 to comprise:
One electric capacity 122, is connected with trigger pip 15 output terminal, carries out charging to provide a drive control voltage to second switch unit 123 and the 3rd switch element 126 under trigger pip 15 controls.
Here, if described shift register 12 is intergrade shift register, then described trigger pip is the carry signal of higher level's shift register output.
Second switch unit 123, carries out switching manipulation under the control of described drive control voltage, thus control clock signal 11 exports from signal output part 120.
Here, the output terminal of described second switch unit 123 is the signal output part 120 of this grade of shift register 12.Described second switch unit 123 to comprise in field effect transistor and triode any one or combination.
3rd switch element 126, carries out switching manipulation under the control of described drive control voltage, thus control clock signal 11 outputs to subordinate's shift register 14, provides carry signal in order to give subordinate's shift register 14.
Here, the carry signal provided to subordinate's shift register 14 works in order to trigger subordinate's shift register 14, and described 3rd switch element 126 to comprise in field effect transistor and triode any one or combination.
Drop-down unit 128, carries out switching manipulation under the control of subordinate's shift register 14 feedback signal, thus controls the output head grounding that described electric capacity 122 ground connection carries out discharging and controlling described second switch unit 123 and described 3rd switch element 126.
Here, described drop-down unit 128 comprises and pulling down switch and earth terminal, described in the one end that pulls down switch be connected with described electric capacity 122, and to be connected with the output terminal of described second switch unit 123, and be connected with the output terminal of described 3rd switch element 126, the other end is connected with described earth terminal.Described pulling down switch to comprise in field effect transistor and triode any one or combination, when described pull down switch comprise pull-down thin film time, then the drain electrode of described pull-down thin film is connected with described electric capacity 122, and be connected with the output terminal of described second switch unit 123, and be connected with the output terminal of described 3rd switch element 126, grid is connected with subordinate shift register 14 feedback signal output, source electrode is connected with described earth terminal, described pull-down thin film is in the control conducting of feedback signal, described electric capacity 122 is discharged, the output head grounding of described second switch unit 123 and described 3rd switch element 126.
Fig. 3 is the schematic diagram of the another specific embodiment of shift register provided by the invention, shown in Figure 3, and the embodiment of the present invention provides a kind of shift register 12 to comprise:
First switch element 121, is connected with higher level's shift register 10 carry signal output end, in order to receive the carry signal that higher level's shift register 10 sends.
Here, described first switch element 121 to comprise in field effect transistor and triode any one or combination.
One electric capacity 122, when described first switch element 121 receives carry signal conducting, carries out charging to provide a drive control voltage to second switch unit 123 and the 3rd switch element 126.
Second switch unit 123, carries out switching manipulation under the control of described drive control voltage, thus control clock signal 11 outputs to higher level's shift register 10, provides feedback signal in order to give higher level's shift register 10.
Here, the output terminal of described second switch unit 123 is the signal output part of this grade of shift register 12.Described second switch unit 123 to comprise in field effect transistor and triode any one or combination.
3rd switch element 126, carries out switching manipulation under the control of described drive control voltage, thus control clock signal 11 outputs to subordinate's shift register 14, provides carry signal in order to give subordinate's shift register 14.
Here, described 3rd switch element 126 to comprise in field effect transistor and triode any one or combination.
First drop-down unit 124, carries out switching manipulation under the control of subordinate's shift register 14 feedback signal, thus controls described electric capacity 122 ground connection and discharge.
Here, described first drop-down unit 124 comprises the 4th switch and the first earth terminal; Described 4th switch one end is connected with electric capacity 122, and the other end is connected with described first earth terminal, also can be connected with a low-tension supply or a negative supply.Described 4th switch to comprise in field effect transistor and triode any one or combination.
Second drop-down unit 125, carries out switching manipulation under the control of subordinate's shift register 14 feedback signal, thus controls the output head grounding of described second switch unit 123.
Here, described second drop-down unit 125 comprises the 5th switch and the second earth terminal; Described 5th switch one end is connected with the output terminal of described second switch unit 123, and the other end is connected with described second earth terminal, also can be connected with a low-tension supply or a negative supply.Described 5th switch to comprise in field effect transistor and triode any one or combination.
3rd drop-down unit 127, carries out switching manipulation under the control of subordinate's shift register 14 feedback signal, thus controls the output head grounding of described 3rd switch element 126.
Here, described 3rd drop-down unit 127 comprises the 6th switch and the 3rd earth terminal; Described 6th switch one end is connected with the output terminal of described 3rd switch element 126, and the other end is connected with described 3rd earth terminal, also can be connected with a low-tension supply or a negative supply.Described 6th switch to comprise in field effect transistor and triode any one or combination.
Shift register described in various embodiments of the present invention can use as the first order, intergrade or afterbody shift register, those skilled in the art can carry out relative set as required, such as: when described shift register is first order shift register, described second switch unit does not need to carry out signal feedback, when described shift register is afterbody shift register, described 3rd switch element can not carry out signal output.
Fig. 4 is the schematic diagram of a specific embodiment of gate driver circuit provided by the invention, shown in Figure 4, the gate driver circuit that the embodiment of the present invention provides comprises the shift register shown in Fig. 2, described gate driver circuit comprises first order shift register, at least one intergrade shift register, afterbody shift register, first order shift register and intergrade shift register are the shift register described in above-described embodiment, afterbody shift register can be the shift register described in above-described embodiment, also can be other shift register in prior art, those skilled in the art can carry out relative set as required.Wherein:
First order shift register, for providing carry signal and provide signal to a gate line under the control of this gate driver circuit start signal and clock signal subordinate's shift register, and under the control of the feedback signal provided at subordinate's shift register, termination signal exports;
Intergrade shift register, here, be described for the shift register 12 in Fig. 4, shown in Figure 4, described shift register 12 comprises electric capacity 122, second switch unit 123, 3rd switch element 126 and drop-down unit 128, wherein, described electric capacity 122 is connected with the output terminal of higher level's shift register 10 carry signal, described second switch unit 123 is connected with clock signal 11 output terminal with described 3rd switch element 126, the output terminal of described second switch unit 123 is connected in order to provide feedback signal to higher level's shift register 10 with higher level's shift register 10, the output terminal of described 3rd switch element 126 is connected in order to provide carry signal to subordinate's shift register 14 with subordinate shift register 14, described drop-down unit 128 is connected to receive the feedback signal that subordinate's shift register 14 provides with subordinate shift register 14, and the output terminal of described second switch unit 123 is connected with gate line 13, in order to provide signal,
Afterbody shift register, for providing signal and provide feedback signal to higher level's shift register under the carry signal of higher level's shift register and the control of clock signal a gate line, and termination signal exports under the control of this gate driver circuit termination signal.
Now, the carry signal of the signal that shift register provides and triggering subordinate shift register is transmitted separately, be independent of each other, ensure that the shift register of every grade by triggered as normal, and then can ensure that stability and the reliability of the gate driver circuit comprising multi-stage shift register.
Fig. 5 is the schematic diagram of another specific embodiment of shift register provided by the invention, shown in Figure 5, and a kind of shift register 12 that the embodiment of the present invention provides comprises:
First switch element 121, comprises a thin film transistor (TFT) M1, and this thin film transistor (TFT) M1 comprises:
One drain electrode, is connected with higher level's shift register 10 carry signal output end, in order to receive the carry signal that higher level's shift register 10 sends;
One grid, is connected with higher level's shift register 10 carry signal output end;
One source pole, is connected with an electric capacity 122.
Electric capacity 122, when described first switch element 121 receives carry signal conducting, carries out charging to provide a drive control voltage to second switch unit 123 and the 3rd switch element 126.
Second switch unit 123, comprise a thin film transistor (TFT) M2, under the control of described drive control voltage, carry out switching manipulation, thus control clock signal 11 outputs to higher level's shift register 10, in order to provide feedback signal to higher level's shift register 10, this thin film transistor (TFT) M2 comprises:
One drain electrode, is connected with described clock signal 11 output terminal;
One grid, is connected with described electric capacity 122, receives described drive control voltage;
One source pole, is connected with higher level's shift register 10.
Here, the output terminal of described second switch unit 123 is the signal output part of this grade of shift register 12.
3rd switch element 126, comprise a thin film transistor (TFT) M3, under the control of described drive control voltage, carry out switching manipulation, thus control clock signal 11 outputs to subordinate's shift register 14, in order to provide carry signal to subordinate's shift register 14, this thin film transistor (TFT) M3 comprises:
One drain electrode, is connected with described clock signal 11 output terminal;
One grid, is connected with described electric capacity 122, receives described drive control voltage;
One source pole, is connected with subordinate shift register 14.
First drop-down unit 124, comprise a thin film transistor (TFT) M4 and the first earth terminal, under the control of subordinate's shift register 14 feedback signal, this thin film transistor (TFT) M4 carries out switching manipulation, thus control described electric capacity 122 ground connection and discharge, this thin film transistor (TFT) M4 comprises:
One drain electrode, is connected with described electric capacity 122;
One grid, is connected, in order to receive the feedback signal that subordinate's shift register 14 provides with subordinate shift register 14;
One source pole, is connected with described first earth terminal.
Second drop-down unit 125, comprise a thin film transistor (TFT) M5 and the second earth terminal, under the control of subordinate's shift register 14 feedback signal, this thin film transistor (TFT) M5 carries out switching manipulation, thus control the output head grounding of described second switch unit 123, this thin film transistor (TFT) M5 comprises:
One drain electrode, is connected with the output terminal of described second switch unit 123;
One grid, is connected, in order to receive the feedback signal that subordinate's shift register 14 provides with subordinate shift register 14;
One source pole, is connected with described second earth terminal.
3rd drop-down unit 127, comprise a thin film transistor (TFT) M6 and the 3rd earth terminal, under the control of subordinate's shift register 14 feedback signal, this thin film transistor (TFT) M6 carries out switching manipulation, thus control the output head grounding of described 3rd switch element 126, this thin film transistor (TFT) M6 comprises:
One drain electrode, is connected with the output terminal of described 3rd switch element 126;
One grid, is connected, in order to receive the feedback signal that subordinate's shift register 14 provides with subordinate shift register 14;
One source pole, is connected with described 3rd earth terminal.
Fig. 6 is the schematic diagram of another specific embodiment of gate driver circuit provided by the invention, shown in Figure 6, the gate driver circuit that the embodiment of the present invention provides comprises the shift register shown in Fig. 5, described gate driver circuit comprises first order shift register, at least one intergrade shift register, afterbody shift register, first order shift register and intergrade shift register are the shift register described in above-described embodiment, afterbody shift register can be the shift register described in above-described embodiment, also can be other shift register in prior art, those skilled in the art can carry out relative set as required.Wherein:
First order shift register, for providing carry signal and provide signal to a gate line under the control of this gate driver circuit start signal and clock signal subordinate's shift register, and under the control of the feedback signal provided at subordinate's shift register, termination signal exports;
Intergrade shift register, here, be described for the shift register 12 in Fig. 6, shown in Figure 6, described shift register 12 comprises the first switch element 121, one electric capacity 122, second switch unit 123, 3rd switch element 126, first drop-down unit 124, second drop-down unit 125 and the 3rd drop-down unit 127, wherein, described first switch element 121 is connected with the output terminal of higher level's shift register 10 carry signal, described second switch unit 123 is connected with clock signal 11 output terminal with described 3rd switch element 126, the output terminal of described second switch unit 123 is connected in order to provide feedback signal to higher level's shift register 10 with higher level's shift register 10, the output terminal of described 3rd switch element 126 is connected in order to provide carry signal to subordinate's shift register 14 with subordinate shift register 14, described first drop-down unit 124, described second drop-down unit 125 and described 3rd drop-down unit 127 are connected to receive the feedback signal that subordinate's shift register 14 provides with subordinate shift register 14, and the output terminal of described second switch unit 123 is connected with gate line 13, in order to provide signal,
Afterbody shift register, for providing signal and provide feedback signal to higher level's shift register under the carry signal of higher level's shift register and the control of clock signal a gate line, and termination signal exports under the control of this gate driver circuit termination signal.
Now, the carry signal of the signal that shift register provides and triggering subordinate shift register is transmitted separately, be independent of each other, ensure that the shift register of every grade by triggered as normal, and then can ensure that stability and the reliability of the gate driver circuit comprising multi-stage shift register.
Fig. 7 is the signal waveforms of the gate driver circuit shown in Fig. 6, shown in Figure 7, and the specific works process of this gate driver circuit is as follows:
When the carry signal that higher level's shift register 10 that thin film transistor (TFT) M1 receives sends starts to become high level, then the signal of the grid of this thin film transistor (TFT) M1 becomes high level, thin film transistor (TFT) M1 conducting, the i.e. drain electrode of thin film transistor (TFT) M1 and source conduction, this source electrode is connected with electric capacity 122, now charge for electric capacity 122, because clock signal 11 is now low level, so the output end signal of second switch unit 123 and the 3rd switch element 126 is low level.
When clock signal 11 also becomes high level, now, the carry signal that clock signal 11 and higher level's shift register 10 send is all high level, and electric capacity 122 is charged, and the signal of the grid of thin film transistor (TFT) M2 and thin film transistor (TFT) M3 all becomes high level from low level.Thin film transistor (TFT) M2 conducting, inputs gate line 13 by high level signal, then the signal of high level will drive pixel thin film transistor conducting, carry out data transmission; This high level signal input higher level shift register 10, then higher level's shift register 10 feedback signal becomes high level.Thin film transistor (TFT) M3 also conducting, then this grade sends to the carry signal of subordinate's shift register 14 to become high level, carries out work in order to trigger subordinate's shift register 14.
When the carry signal that higher level's shift register 10 sends becomes low level, then the grid of thin film transistor (TFT) M1 is low level, thin film transistor (TFT) M1 is disconnected, but because now the voltage of electric capacity 122 still keeps acting on, the grid of thin film transistor (TFT) M2 and thin film transistor (TFT) M3 is all still high level, and namely thin film transistor (TFT) M2 and thin film transistor (TFT) M3 is still in conducting state.
When the feedback signal that subordinate's shift register 14 work exports is high level, the grid of thin film transistor (TFT) M4, thin film transistor (TFT) M5 and thin film transistor (TFT) M6 is made all to become high level, then thin film transistor (TFT) M4, thin film transistor (TFT) M5 and the equal conducting of thin film transistor (TFT) M6, electric capacity 122 ground connection is discharged, and by output terminal all ground connection of the output terminal of the second switch unit 123 of this grade of shift register 12 and the 3rd switch element 126, the signal making this grade be supplied to gate line 13 becomes low level, can close pixel thin film transistor by this stage.
A kind of display device, comprise the gate driver circuit shown in above-mentioned Fig. 4 or Fig. 6, this gate driver circuit is in order to control pixel thin film transistor break-make in this display device, and then control data transmission.Here, described display device comprises liquid crystal panel, liquid crystal display, LCD TV, PDP, FED, OELD panel, OLED display and OLED TV etc.
As seen through the above technical solutions, the shift register that the embodiment of the present invention provides comprises an electric capacity, second switch unit, the 3rd switch element and drop-down unit.Wherein, described second switch unit controls clock signal exports from signal output part, and described 3rd switch element controls clock signal and outputs to subordinate's shift register, in order to trigger subordinate's shift register.When gate driver circuit comprises above-mentioned shift register, then the signal output part of shift register connects gate line, in order to provide signal.Now, the signal that this grade of shift register provides and the carry signal triggering subordinate's shift register are transmitted separately, be independent of each other, ensure that the shift register of every grade can by triggered as normal, and then ensure that stability and the reliability of the gate driver circuit comprising multi-stage shift register, ensure that stability and the reliability of the display device comprising this gate driver circuit.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a shift register, is characterized in that, described shift register only comprises:
One electric capacity, is connected with trigger pip output terminal, carries out charging to provide a drive control voltage to second switch unit and the 3rd switch element under trigger pip controls;
Second switch unit, carries out switching manipulation under the control of described drive control voltage, thus control clock signal exports from signal output part;
3rd switch element, carries out switching manipulation under the control of described drive control voltage, thus control clock signal outputs to subordinate's shift register, in order to trigger subordinate's shift register;
Drop-down unit, carries out switching manipulation under the control of feedback signal, thus controls the output head grounding that described capacity earth carries out discharging and controlling described second switch unit and described 3rd switch element;
First switch element, is connected with trigger pip output terminal, then
Described electric capacity, charges when described first switch element receives trigger pip conducting.
2. shift register as claimed in claim 1, is characterized in that, described first switch element to comprise in field effect transistor and triode any one or combination;
Described second switch unit to comprise in field effect transistor and triode any one or combination;
Described 3rd switch element to comprise in field effect transistor and triode any one or combination.
3. shift register as claimed in claim 1, it is characterized in that, when described first switch element comprises the first film transistor, and described second switch unit comprises the second thin film transistor (TFT), and when described 3rd switch element comprises the 3rd thin film transistor (TFT), then
The drain electrode of described the first film transistor is connected with trigger pip output terminal, and grid is connected with trigger pip output terminal, and source electrode is connected with described electric capacity;
The drain electrode of described second thin film transistor (TFT) is connected with clock signal output terminal, and grid is connected to receive described drive control voltage with described electric capacity, and source electrode is connected with signal output part;
The drain electrode of described 3rd thin film transistor (TFT) is connected with clock signal output terminal, and grid is connected to receive described drive control voltage with described electric capacity; Source electrode is connected with subordinate shift register.
4. shift register as claimed in claim 1, is characterized in that, described drop-down unit comprises and pulling down switch and earth terminal;
The described one end that pulls down switch is connected with described electric capacity, and is connected with the output terminal of described second switch unit, and is connected with the output terminal of described 3rd switch element, and the other end is connected with described earth terminal.
5. shift register as claimed in claim 4, is characterized in that, described in pull down switch and to comprise in field effect transistor and triode any one or combination.
6. shift register as claimed in claim 4, is characterized in that, when described pull down switch comprise pull-down thin film time, then
The drain electrode of described pull-down thin film is connected with described electric capacity, and is connected with the output terminal of described second switch unit, and is connected with the output terminal of described 3rd switch element, and grid is connected with feedback signal output, and source electrode is connected with described earth terminal.
7. a gate driver circuit, comprise first order shift register, at least one intergrade shift register, afterbody shift register, it is characterized in that, first order shift register and intergrade shift register are the shift register in claim 1 ~ 6 described in any one, wherein
First order shift register, for providing carry signal and provide signal to a gate line under the control of this gate driver circuit start signal and clock signal subordinate's shift register, and under the control of the feedback signal provided at subordinate's shift register, termination signal exports;
Intergrade shift register, comprise electric capacity, second switch unit, 3rd switch element and drop-down unit, wherein, described electric capacity is connected with higher level's shift register carry signal output end, described second switch unit is connected with clock signal output terminal with described 3rd switch element, the output terminal of described second switch unit is connected to trigger higher level's shift register with higher level's shift register, the output terminal of described 3rd switch element is connected to trigger subordinate's shift register with subordinate shift register, described drop-down unit is connected to receive the feedback signal that subordinate's shift register provides with subordinate shift register, and the output terminal of described second switch unit is connected with gate line, in order to provide signal,
Afterbody shift register, for providing signal and provide feedback signal to higher level's shift register under the carry signal of higher level's shift register and the control of clock signal a gate line, and termination signal exports under the control of this gate driver circuit termination signal.
8. a display device, is characterized in that, comprises gate driver circuit according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110430803.7A CN102651188B (en) | 2011-12-20 | 2011-12-20 | A kind of shift register, gate driver circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110430803.7A CN102651188B (en) | 2011-12-20 | 2011-12-20 | A kind of shift register, gate driver circuit and display device |
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| Publication Number | Publication Date |
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| CN102651188A CN102651188A (en) | 2012-08-29 |
| CN102651188B true CN102651188B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110430803.7A Active CN102651188B (en) | 2011-12-20 | 2011-12-20 | A kind of shift register, gate driver circuit and display device |
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| CN (1) | CN102651188B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102457481B1 (en) | 2016-04-14 | 2022-10-24 | 삼성디스플레이 주식회사 | Gate driving circuit and display device having the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303896A (en) * | 2008-06-17 | 2008-11-12 | 友达光电股份有限公司 | Shift buffer capable of reducing frequency coupling effect and shift buffer unit |
| CN101609719A (en) * | 2009-07-22 | 2009-12-23 | 友达光电股份有限公司 | The shift register of display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8605027B2 (en) * | 2004-06-30 | 2013-12-10 | Samsung Display Co., Ltd. | Shift register, display device having the same and method of driving the same |
| KR20080057601A (en) * | 2006-12-20 | 2008-06-25 | 삼성전자주식회사 | Gate driving circuit and display apparatus having the same |
| KR20080000205A (en) * | 2006-06-27 | 2008-01-02 | 삼성전자주식회사 | Gate driving circuit and display apparatus having the same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303896A (en) * | 2008-06-17 | 2008-11-12 | 友达光电股份有限公司 | Shift buffer capable of reducing frequency coupling effect and shift buffer unit |
| CN101609719A (en) * | 2009-07-22 | 2009-12-23 | 友达光电股份有限公司 | The shift register of display device |
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| CN102651188A (en) | 2012-08-29 |
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