CN104751770B - Emission control drive circuit and the OLED using the circuit - Google Patents
Emission control drive circuit and the OLED using the circuit Download PDFInfo
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- CN104751770B CN104751770B CN201310725216.XA CN201310725216A CN104751770B CN 104751770 B CN104751770 B CN 104751770B CN 201310725216 A CN201310725216 A CN 201310725216A CN 104751770 B CN104751770 B CN 104751770B
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Abstract
A kind of OLED the invention discloses emission control drive circuit and using the circuit.The emission control drive circuit includes：Pulse signal input terminal and initial signal input；Drive signal generation unit, it is connected with the pulse signal input terminal and initial signal input, for producing emissioning controling signal according to the pulse signal and initial signal that receive；Emissioning controling signal output end, it is connected with the drive signal generation unit, for the emissioning controling signal to be output to the grid of emission control transistor in the image element circuit of OLED；Wherein, the emissioning controling signal is the alternate signal of low and high level.Emission control drive circuit of the present invention can produce the alternate emissioning controling signal of low and high level, opened and closed so that the emission control transistor of image element circuit is intermittent, and then corresponding OLED intervals hair tonic light is controlled, so as to greatly prolong the life-span of emission control transistor and OLED.
Description
Technical field
The present invention relates to organic light emitting display technology, specifically, is a kind of emission control drive circuit and uses the electricity
The OLED on road.
Background technology
In recent years, with the progress of luminescent material and related self-luminous flat panel display, OLED is
Through having obtained a range of application.Current classical image element circuit structure is as shown in figure 1, Fig. 2 is its conventional work schedule
Waveform.In t3 stages EM（Control）Signal is low level, and corresponding emission control transistor is opened, and then OLED（Organic light emission two
Pole pipe）Device lights.Under this traditional mode of operation, emission control transistor most times within the time of a frame
In open mode, while the OLED overwhelming majority time is all luminous, and this will cause emission control transistor AND gate OLED
The life-span of device declines.
The content of the invention
It can be exported the technical problem to be solved in the present invention is to provide one kind so that being knocked off between pixel switch controlling transistor
The emission control drive circuit of the signal of work, and the OLED using the emission control drive circuit.
In order to solve the above-mentioned technical problem, the invention provides a kind of emission control drive circuit, including：
Pulse signal input terminal and initial signal input；
Drive signal generation unit, it is connected with the pulse signal input terminal and initial signal input, is connect for basis
The pulse signal and initial signal that receive produce the emissioning controling signal for driving OLED；
Emissioning controling signal output end, it is connected with the drive signal generation unit, for by the emissioning controling signal
It is output to the grid of emission control transistor in the image element circuit of OLED；
Wherein, the emissioning controling signal is the alternate signal of low and high level.
Further, the pulse signal input terminal has three, is respectively used to receive the first pulse signal, the second pulse letter
Number and the 3rd pulse signal.
Further, the drive signal generation unit includes sampled signal generation circuit, the 6th transistor M6 and the 3rd
Capacitor C3, the sampled signal generation circuit are used to receive the first pulse signal CK1, the second pulse signal CK2, initial signal
IN, a high level signal VGH and a low level signal VGL, and sampled signal is exported by sampled signal output node；Described 6th
Transistor M6 gate electrode connects the sampled signal output node, and the 6th transistor M6 first end connects the high level letter
Number VGH, the second end connect one end of the 3rd capacitor C3, and the other end of the 3rd capacitor C3 receives the 3rd pulse letter
Number CK3；Node between the second end of the 6th transistor M6 and the 3rd capacitor C3 exports the emission control letter
Number.
Further, the sampled signal output node also drives the sampled signal exported to next stage emission control
Circuit, the initial signal as next stage emission control drive circuit.
Further, the sampled signal generation circuit includes the first transistor M1, second transistor M2, third transistor
M3, the 4th transistor M4 and the 5th transistor M5, wherein, the first transistor M1 gate electrode receives the first pulse signal CK1, the
One end receives initial signal IN, the second end connection second transistor M2 gate electrode, and second transistor M2 first end receives
Second pulse signal CK2, the second end are connected to third transistor M3 gate electrode, and third transistor M3 first end is provided height
Level signal VGH, the other end are connected to the 5th transistor M5 gate electrode, and the 4th transistor M4 gate electrode is connected to the first crystalline substance
Body pipe M1 gate electrode, first end connect the 5th transistor M5 first end, and the second end is connected to low level signal VGL, and the 5th
Transistor M5 first end is provided high level signal VGH, wherein, first end and the 5th transistor of the 4th transistor M4
Node N2 between M5 first end forms the sampled signal output node.
Further, the first capacitor C1, the first capacitor C1 one end reception low level signal VGL is included,
The other end is connected to the gate electrode of the second transistor M2.
Further, in addition to the second capacitor C2, the second capacitor C2 is connected to second transistor M2 grid electricity
Between pole and the 6th transistor M6 gate electrode.
Present invention also offers a kind of OLED for including above-mentioned emission control drive circuit.
Further, the multistage emission control drive circuit of concatenation is included.
Further, the first pulsed signal end of the emission control drive circuit of odd level receives the first pulse
Signal CLK1, the second pulsed signal end receive the second pulse signal CLK2, the emission control drive circuit of even level
The first pulsed signal end receive the second pulse signal CLK2, the second pulsed signal end reception signal CLK1.Odd number
Level and the 3rd pulsed signal end of the emission control drive circuit of even level receive the 3rd pulse signal CLK3.
Emission control drive circuit of the present invention can produce the alternate emissioning controling signal of low and high level, so that pixel is electric
The emission control transistor on road is intermittent to be opened and closed, and then controls corresponding OLED intervals hair tonic light, so as to significantly
Extend the life-span of emission control transistor and OLED.
Brief description of the drawings
Fig. 1 is the schematic diagram for commonly using pixel-driving circuit in the prior art.
Fig. 2 is the timing waveform of pixel-driving circuit shown in Fig. 1.
Fig. 3 is the theory diagram of an embodiment of the OLED of the present invention.
Fig. 4 is the schematic diagram of the embodiment of first order emission control drive circuit one in embodiment illustrated in fig. 3.
Fig. 5 is the circuit structure diagram after further being improved on the basis of embodiment illustrated in fig. 4.
Fig. 6 is the oscillogram of the circuit course of work of embodiment illustrated in fig. 5.
Fig. 7 is the work wave using the emissioning controling signal respective pixel of the emission control drive circuit output of the present invention
Figure.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
It is better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
As shown in figure 3, the OLED of the present invention includes the multi-stage launch control drive circuit being connected in series, often
Level emission control drive circuit includes：
Pulse signal input terminal and initial signal input；
Drive signal generation unit, it is connected with the pulse signal input terminal and initial signal input, is connect for basis
The pulse signal and initial signal that receive produce the emissioning controling signal for driving OLED；
Emissioning controling signal output end, it is connected with the drive signal generation unit, for by the emissioning controling signal
It is output to the grid of emission control transistor in the image element circuit of OLED；
Wherein, the emissioning controling signal is the alternate signal of low and high level.
Preferably, the pulse signal input terminal has three, is respectively used to receive the first pulse signal, the second pulse signal
With the 3rd pulse signal.
Emission control drive circuit as shown in Figure 4, by taking first order emission control drive circuit as an example, form emission control
The drive signal generation unit of drive circuit includes sampled signal generation circuit（Part in dotted line frame）, the 6th transistor
M6 and the 3rd capacitor C3.Wherein sampled signal generation circuit be used for receive the first pulse signal CK1, the second pulse signal CK2,
Initial signal IN, a high level signal VGH and a low level signal VGL, and sampled signal is exported by sampled signal output node.
And the 6th transistor M6 gate electrode is connected to the sampled signal output node of sampled signal generation circuit, the 6th transistor M6's
First end connects high level signal VGH, and the second end connects the 3rd capacitor C3 one end, and the 3rd capacitor C3 other end receives
3rd pulse signal CK3；Node between 6th transistor M6 the second end and the 3rd capacitor C3 exports the emission control
Signal.The present invention produces emissioning controling signal using the sampled signal of existing sampled signal generation circuit output, simplifies
Circuit design, reduce production cost.
A kind of part in the preferred embodiment such as Fig. 4 of sampled signal generation circuit therein in dotted line frame, including the
One transistor M1, second transistor M2, third transistor M3, the 4th transistor M4 and the 5th transistor M5, wherein, first is brilliant
Body pipe M1 gate electrode receives the first pulse signal CK1, and first end receives initial signal IN, the second end connection second transistor
M2 gate electrode, second transistor M2 first end receive the second pulse signal CK2, and the second end is connected to third transistor M3
Gate electrode, third transistor M3 first end is provided high level signal VGH, and the other end is connected to the 5th transistor M5 grid
Electrode, the 4th transistor M4 gate electrode are connected to the first transistor M1 gate electrode, and first end connects the 5th transistor M5's
First end, the second end are connected to low level signal VGL, and the 5th transistor M5 first end is provided high level signal VGH, its
In, the node N2 between the first end of the 4th transistor M4 and the 5th transistor M5 first end forms the sampled signal
Output node.
Shown in as shown in Figure 34, sampled signal output node also drives the sampled signal exported to next stage emission control
Dynamic circuit, the initial signal as next stage emission control drive circuit.
As shown in figure 5, two capacitors, i.e. emission control drive circuit can be increased also on the basis of above-described embodiment
Low level signal VGL, the other end are received including the first capacitor C1 and the second capacitor C2, the first capacitor C1 one end
It is connected to the gate electrode of the second transistor M2；The second capacitor C2 is connected to second transistor M2 gate electrode and
Between six transistor M6 gate electrode.First capacitor C1 and the second capacitor C2 effect, stablize the first transistor M1
The voltage of node N1 between second end and second transistor M2 gate electrode.
As shown in fig. 6, the oscillogram of the circuit course of work for embodiment illustrated in fig. 5.Referring also to shown in Fig. 5, first
Pulse signal CK1 and initial signal IN provides low level signal simultaneously, when the second pulse signal CK2 provides high level signal, the
One transistor M1, second transistor M2, the 4th transistor M4, the 5th transistor M5 are opened, and corresponding node N2 is high level, and the 3rd
Transistor M3, the 6th transistor M6 are closed, and now the 3rd pulse signal CK3 couples a signal to transmitting by the 3rd capacitor C3
Control signal EM output point, now EM signals are identical with the 3rd pulse signal CK3 waveforms.When initial signal IN, the first pulse
Signal CK1 is changed into high level simultaneously, and when the second pulse signal CK2 is low level, second transistor M2, third transistor M3 are beaten
Open, the first transistor M1, the 4th transistor M4, the 5th transistor M5 are closed, and node N2 is low level, namely sampled signal OUT
For low level, then the 6th transistor M6 transistors opening, VGH signals are exported to EM signal output sections by the 6th transistor M6
Point.When initial signal IN, the second pulse signal CK2 are high level, when the first pulse signal CK1 is low level, the first transistor
M1, the 4th transistor M4, the 5th transistor M5 are opened, and second transistor M2, third transistor M3 are closed, and now node N2 is height
Level, then the 6th transistor M6 closings, the 3rd pulse signal CK3 are exported by the 3rd capacitor C3 coupled to emissioning controling signal
Hold EM.EM1 signals as shown in Figure 6 are then drawn by above working method, to be supplied to the emission control in image element circuit
Transistor.
The emissioning controling signal that the emission control drive circuit of the present invention is exported, can be supplied to OLED
One-row pixels circuit, multirow image element circuit can also be supplied to simultaneously.The multi-stage launch of the OLED of the present invention
Control in drive circuit, the sampled signal OUT of first order emission control drive circuit is provided to second level emission control driving
The input of circuit, and then emission control drive circuit in the second level produces emissioning controling signal EM2.By that analogy, can produce
More emissioning controling signals.
In addition, in the present invention, the first pulsed signal end of the emission control drive circuit of odd level receives
First pulse signal CLK1, the second pulsed signal end receive the second pulse signal CLK2, the emission control of even level
First pulsed signal end of drive circuit receives the second pulse signal CLK2, the second pulsed signal end reception signal
CLK1.3rd pulsed signal end of the emission control drive circuit of odd level and even level receives the 3rd pulse letter
Number CLK3.
Fig. 7 shows the timing waveform using emissioning controling signal driving image element circuit work caused by the present invention.It is existing
Have in technology, in launching phase（The t3 stages shown in Fig. 2）, EM signals are in low level all the time.And the hair of the invention shown in Fig. 7
It is that low and high level is alternate to penetrate control signal, opens and closes, enters so that the emission control transistor of image element circuit is intermittent
And control corresponding OLED intermittent luminous, so as to greatly prolong the life-span of emission control transistor and OLED.And
The brightness of OLED can be adjusted by the dutycycle of the 3rd pulse signal.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
Enclose not limited to this.The equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (8)
- A kind of 1. emission control drive circuit, it is characterised in that including：Pulse signal input terminal and initial signal input, the pulse signal input terminal have three, are respectively used to reception first Pulse signal, the second pulse signal and the 3rd pulse signal；Drive signal generation unit, it is connected with the pulse signal input terminal and initial signal input, is received for basis Pulse signal and initial signal produce emissioning controling signal for driving OLED；Emissioning controling signal output end, it is connected with the drive signal generation unit, for the emissioning controling signal to be exported The grid of emission control transistor into the image element circuit of OLED；Wherein, the emissioning controling signal is the alternate signal of low and high level；The drive signal generation unit includes sampled signal generation circuit, the 6th transistor M6 and the 3rd capacitor C3, described Sampled signal generation circuit is used to receive the first pulse signal CK1, the second pulse signal CK2, initial signal IN, high level letter A number VGH and low level signal VGL, and sampled signal is exported by sampled signal output node；The grid of the 6th transistor M6 Electrode connects the sampled signal output node, and the 6th transistor M6 first end connects the high level signal VGH, the second end One end of the 3rd capacitor C3 is connected, the other end of the 3rd capacitor C3 receives the 3rd pulse signal CK3；Described Node between six transistor M6 the second end and the 3rd capacitor C3 exports the emissioning controling signal；The sampling letter Number generation circuit includes the first transistor M1, second transistor M2, third transistor M3, the 4th transistor M4 and the 5th crystal Pipe M5, wherein, the first transistor M1 gate electrode receives the first pulse signal CK1, and first end receives initial signal IN, and second End connection second transistor M2 gate electrode, second transistor M2 first end receive the second pulse signal CK2, and the second end connects Third transistor M3 gate electrode is connected to, third transistor M3 first end is provided high level signal VGH, and the other end is connected to 5th transistor M5 gate electrode, the 4th transistor M4 gate electrode are connected to the first transistor M1 gate electrode, and first end connects The 5th transistor M5 first end is connect, the second end is connected to low level signal VGL, and the 5th transistor M5 first end is provided height Level signal VGH, wherein, the node N2 shapes between the first end of the 4th transistor M4 and the 5th transistor M5 first end Into the sampled signal output node.
- 2. emission control drive circuit according to claim 1, it is characterised in that the sampled signal output node will also The sampled signal exported gives next stage emission control drive circuit, and the starting as next stage emission control drive circuit is believed Number.
- 3. emission control drive circuit according to claim 1, it is characterised in that described also including the first capacitor C1 First capacitor C1 one end receives low level signal VGL, and the other end is connected to the gate electrode of the second transistor M2.
- 4. emission control drive circuit according to claim 1, it is characterised in that described also including the second capacitor C2 Second capacitor C2 is connected between second transistor M2 gate electrode and the 6th transistor M6 gate electrode.
- 5. emission control drive circuit according to claim 3, it is characterised in that described also including the second capacitor C2 Second capacitor C2 is connected between second transistor M2 gate electrode and the 6th transistor M6 gate electrode.
- 6. one kind includes the OLED of the emission control drive circuit described in any one in claim 1 ~ 5.
- 7. OLED according to claim 6, it is characterised in that the multistage emission control including concatenation Drive circuit.
- 8. OLED according to claim 7, it is characterised in that the emission control driving electricity of odd level The first pulsed signal end on road receives the first pulse signal CLK1, and the second pulsed signal end receives the second pulse signal CLK2, the first pulsed signal end of the emission control drive circuit of even level receive the second pulse signal CLK2, the The 3rd pulse letter of the emission control drive circuit of two pulsed signal end reception signal CLK1, odd level and even level Number receiving terminal receives the 3rd pulse signal CLK3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310725216.XA CN104751770B (en) | 2013-12-25 | 2013-12-25 | Emission control drive circuit and the OLED using the circuit |
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| CN201310725216.XA CN104751770B (en) | 2013-12-25 | 2013-12-25 | Emission control drive circuit and the OLED using the circuit |
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| CN104751770B true CN104751770B (en) | 2018-01-16 |
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| CN108122534B (en) | 2016-11-29 | 2019-03-26 | 昆山国显光电有限公司 | A kind of drive control circuit and its driving method, display device |
| TWI651704B (en) * | 2017-07-20 | 2019-02-21 | 友達光電股份有限公司 | Panel driving circuit and panel driving method |
| CN207781162U (en) * | 2018-01-19 | 2018-08-28 | 昆山国显光电有限公司 | A kind of emission control circuit, light emitting control driver and display device |
| CN110767173B (en) * | 2019-11-08 | 2021-03-23 | 京东方科技集团股份有限公司 | Display driving method, display driver and display device |
| CN113066422B (en) * | 2019-12-13 | 2022-06-24 | 华为机器有限公司 | Scanning and light-emitting drive circuit, scanning and light-emitting drive system and display panel |
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| KR100646992B1 (en) * | 2005-09-13 | 2006-11-23 | 삼성에스디아이 주식회사 | Emission driver and organic light emitting display using the same |
| KR100793557B1 (en) * | 2006-06-05 | 2008-01-14 | 삼성에스디아이 주식회사 | Organic electro luminescence display and driving method thereof |
| KR100986887B1 (en) * | 2009-02-17 | 2010-10-08 | 삼성모바일디스플레이주식회사 | Emission Driver and Organic Light Emitting Display Using the same |
| CN101847445B (en) * | 2009-03-27 | 2012-11-21 | 北京京东方光电科技有限公司 | Shift register and grid line driving device thereof |
| KR101944465B1 (en) * | 2011-01-06 | 2019-02-07 | 삼성디스플레이 주식회사 | Emission Driver and Organic Light Emitting Display Device Using the same |
| CN103065584B (en) * | 2012-12-18 | 2015-06-03 | 华南理工大学 | Power source organic electroluminescence scanning drive device and drive method thereof |
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Effective date of registration: 20201215 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: Building 4, No.1 Longteng Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |
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