CN107818754A - Image element circuit and active matrix/organic light emitting display - Google Patents
Image element circuit and active matrix/organic light emitting display Download PDFInfo
- Publication number
- CN107818754A CN107818754A CN201610818006.9A CN201610818006A CN107818754A CN 107818754 A CN107818754 A CN 107818754A CN 201610818006 A CN201610818006 A CN 201610818006A CN 107818754 A CN107818754 A CN 107818754A
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- Prior art keywords
- transistor
- light emitting
- image element
- element circuit
- organic light
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
In image element circuit provided by the invention and active matrix/organic light emitting display, by the three scan line that the 9th transistor and control the 9th transistor are set between the first power supply and the anode of OLED, form simple controllable aging circuit, thus it is applied to that the aging voltage at OLED both ends is unrestricted, the aging effect of OLED is more preferably.
Description
Technical field
The present invention relates to technical field of flat panel display, more particularly to a kind of image element circuit and active matrix organic light-emitting are shown
Device.
Background technology
OLED (English full name Organic Lighting Emitting Display, abbreviation OLED) is
A kind of active luminescent device, compared to present main flow flat panel display Thin Film Transistor-LCD (English full name Thin
Film Transistor liquid crystal display, abbreviation TFT-LCD), OLED have high-contrast, wide viewing angle,
The advantages that low-power consumption, thinner volume, it is expected to turn into the flat panel display of future generation after TFT-LCD, is that current flat board shows
Show one of the most technology that attracted attention in technology.
According to the difference of type of drive, OLED is divided into passive-matrix OLED (English full name
Passive Matrix Organic Lighting Emitting Display, abbreviation PMOLED) and the organic hair of active-matrix
Optical display unit (English full name Active Matrix Organic Lighting Emitting Display, abbreviation AMOLED),
Active matrix organic light-emitting display is also referred to as active matrix/organic light emitting display.Active matrix/organic light emitting display includes
The pel array that scan line, data wire and the scan line and data wire are defined, each pixel of the pel array
Include Organic Light Emitting Diode (also referred to as OLED) and image element circuit, the Organic Light Emitting Diode are incorporated in the first power supply
Between second source, the image element circuit is incorporated between the first power supply and Organic Light Emitting Diode, and institute is fed to control
State the driving current of Organic Light Emitting Diode.
In the manufacturing process of active matrix/organic light emitting display, it is necessary to by aging technique to the both ends of OLED
Apply aging voltage, to improve the Performance And Reliability of OLED.However, found during the aging technique of reality,
The aging voltage that OLED both ends are applied is limited by image element circuit, and portion voltage condition can not be straight by image element circuit
Connect and be applied to OLED both ends.
Base this, how solving existing active matrix/organic light emitting display part aging voltage in aging can not pass through
Image element circuit is applied directly to the problem of OLED both ends, and a technology urgently to be resolved hurrily into those skilled in the art is asked
Topic.
The content of the invention
It is existing to solve it is an object of the invention to provide a kind of image element circuit and active matrix/organic light emitting display
Active matrix/organic light emitting display part aging voltage in aging can not be applied directly to OLED by image element circuit
The problem of both ends.
To solve the above problems, the present invention provides a kind of image element circuit, the image element circuit includes：
The first transistor, it is connected between data wire and first node, its grid is connected to the second scan line；
Second transistor and the 4th strings of transistors are coupled between section point and the 3rd node, and its grid is all connected to second
Scan line；
Third transistor, it is connected between first node and the first power supply, its grid is connected to control line；
5th transistor, it is connected between first node and the 3rd node, its grid is connected to section point；
The strings of transistors of 6th transistor AND gate the 8th is coupled between section point and reference power source, and its grid is all connected to first
Scan line；
7th transistor is connected between the 3rd node and the anode of Organic Light Emitting Diode, and its grid is connected to control
Line；
9th transistor, it is connected between the first power supply and the anode of Organic Light Emitting Diode, its grid is connected to the 3rd
Scan line；
First capacitor, both ends are connected with the first power supply with section point respectively；
Second capacitor, both ends are connected with the second scan line with section point respectively.
Optionally, in described image element circuit, the negative electrode of the Organic Light Emitting Diode is connected with second source.
Optionally, in described image element circuit, first power supply and second source are used as the organic light-emitting diodes
The driving power of pipe.
Optionally, in described image element circuit, first power supply and second source are used as the organic light-emitting diodes
The aging power supply of pipe.
Optionally, in described image element circuit, the conducting of the first transistor, second transistor and the 4th transistor
The the second scanning signal control provided with cut-off by second scan line, the third transistor and the 7th transistor are led
The control signal that logical and cut-off is provided by the control line controls, the conducting and cut-off of the 6th transistor and the 8th transistor
The first scanning signal provided by first scan line controls.
Optionally, in described image element circuit, the conducting and cut-off of the 9th transistor are by the three scan line
The 3rd scanning signal control provided.
Optionally, in described image element circuit, the first transistor to the 9th transistor is thin film transistor (TFT).
Accordingly, present invention also offers a kind of active matrix/organic light emitting display, the active matrix organic light-emitting
Display includes image element circuit as described above.
In image element circuit provided by the invention and active matrix/organic light emitting display, by the first power supply and OLED
The three scan line of 9th transistor and control the 9th transistor is set between the anode of device, formed simple controllable
Aging circuit, is thus applied to that the aging voltage at OLED both ends is unrestricted, and the aging effect of OLED is more preferably.
Brief description of the drawings
Fig. 1 is the structural representation of the image element circuit of the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments to a kind of image element circuit proposed by the present invention and active matrix organic light-emitting
Display is described in further detail.According to following explanation and claims, advantages and features of the invention will become apparent from.Need
Illustrate, accompanying drawing uses using very simplified form and non-accurately ratio, only to conveniently, lucidly auxiliary is said
The purpose of the bright embodiment of the present invention.
Fig. 1 is refer to, it is the structural representation of the image element circuit of the embodiment of the present invention.As shown in figure 1, the pixel electricity
Road 20 includes：
The first transistor M1, it is connected between data wire VDATA and first node N1, its grid is connected to the second scan line
sa2；
Second transistor M2 and the 4th transistor M4 are series between section point N2 and the 3rd node N3, and its grid connects
It is connected to the second scan line sa2；
Third transistor M3, it is connected between first node N1 and the first power supply ELVDD, its grid is connected to control line
EM；
5th transistor M5, it is connected between first node N1 and the 3rd node N3, its grid is connected to section point N2；
6th transistor M6 and the 8th transistor M8 are series between section point N2 and reference power source VREF, and its grid is equal
It is connected to the first scan line sa1；
7th transistor M7, it is connected between the 3rd node N3 and Organic Light Emitting Diode OLED anode, its grid connects
It is connected to control line EM；
9th transistor M9, it is connected between the first power supply ELVDD and Organic Light Emitting Diode OLED anode, its grid
It is connected to three scan line sa3；
First capacitor, both ends are connected with the first power supply ELVDD with section point N2 respectively；
Second capacitor, both ends are connected with the second scan line sa2 with section point N2 respectively.
Specifically, as shown in figure 1, the anode of the Organic Light Emitting Diode OLED is connected with the image element circuit 20, institute
The negative electrode for stating Organic Light Emitting Diode OLED is connected with second source ELVSS, and the image element circuit 20 is fed to institute for control
State Organic Light Emitting Diode OLED driving current.The first power supply ELVDD be used for provide the first supply voltage, described second
Power supply ELVSS is used to provide second source voltage.
When driving the Organic Light Emitting Diode OLED to carry out luminous, the first power supply ELVDD and second source ELVSS
Driving power as Organic Light Emitting Diode OLED.When carrying out aging to the Organic Light Emitting Diode OLED, described first
Power supply and second source are used as the aging power supply of the Organic Light Emitting Diode.In the present embodiment, the second source ELVSS connects
Ground, the second source voltage are ground voltage.
Please continue to refer to Fig. 1, the image element circuit 20 is a kind of 9T2C types circuit structure, including 9 transistors and 2 electricity
Hold.Preferably, the first transistor M1 to the 9th transistor M9 is thin film transistor (TFT).The first transistor M1 to the 9th
Transistor M9 can select P-type TFT, can also select N-type TFT.Known, P-type TFT exists
Signal turns on when being low level bit, and N-type TFT turns on when signal is high level position.Therefore, as long as will
The transistor types of selection and electric conduction non-colinear position.
Wherein, the first transistor M1, second transistor M2 and the 4th transistor M4 conducting and cut-off are by the second scanning
The second scanning signal control that line sa2 is provided, third transistor M3 and the 7th transistor M7 conducting and cut-off are by control line EM
The control signal control of offer, the 6th transistor M6 and the 8th transistor M8 conducting and cut-off carry by the first scan line sa1
The the first scanning signal control supplied, the 3rd scanning that the 9th transistor M9 conducting and cut-off are provided by three scan line sa3 are believed
Number control.
In the present embodiment, the first transistor M1 to the 9th transistor M9 is N-type TFT.
When the first scanning signal that the first scan line sa1 is provided transits to high level, the 6th transistor M6 and the 8th is brilliant
Body pipe M8 is both turned on, and the reference voltage that reference power source VREF is provided is applied to the via the 8th transistor M8 and the 6th transistor M6
Two node N2.
When the second scanning signal that the second scan line sa2 is provided transits to high level, the first transistor M1, the second crystal
Pipe M2 and the 4th transistor M4 are both turned on, and the data-signal that data wire VDATA is provided writes first segment via the first transistor M1
Point N1.
When the control signal that control line EM is provided is high level, third transistor M3 and the 7th transistor M7 are both turned on,
The driving current of 5th transistor M5 outputs is along the first power supply ELVDD through third transistor M3, the 5th transistor M5, the 7th crystal
Pipe M7 and Organic Light Emitting Diode OLED path flow to second source ELVSS, cause Organic Light Emitting Diode OLED point brighten the hairs
Light.
When the 3rd scanning signal that three scan line sa3 is provided is high level, the 9th transistor M9 conductings, the first power supply
The first supply voltage that ELVDD is provided is provided to the anode of the Organic Light Emitting Diode OLED via the 9th transistor M9.
In the present embodiment, driving transistors of the 5th transistor M5 as pixel, come corresponding to section point N2 current potential
Control provides the driving current to the Organic Light Emitting Diode OLED, and the Organic Light Emitting Diode OLED is according to the driving
Electric current sends the light of corresponding brightness, so as to display image.
In the image element circuit 20, set between the anode of the first power supply ELVDD and Organic Light Emitting Diode OLED
The 9th transistor M9 is put, one end of the 9th transistor M9 is connected by its corresponding contact hole with the first power supply ELVDD, institute
The other end for stating the 9th transistor M9 is connected by its corresponding contact hole and the anode of OLED.In the image element circuit 20
In, include control the 9th transistor M9 three scan line sa3, the three scan line sa3 as Aging control line,
Control the 9th transistor M9 switch.Thus, simple controllable aging circuit (dotted arrow is formd in the image element circuit 20
Shown part).When needing to carry out aging, the 9th transistor M9 conductings, aging voltage is applied to organic via the aging circuit
Light emitting diode OLED both ends.
Accordingly, present invention also offers a kind of active matrix/organic light emitting display, the active matrix organic light-emitting
Display includes image element circuit 20 as described above.Specific to refer to above, here is omitted.
When the active matrix/organic light emitting display carries out aging, Organic Light Emitting Diode OLED minus earth is (i.e.
The second source voltage is ground voltage), the 3rd scanning signal that three scan line sa3 is provided is changed into high level so that the
Nine transistor M9 are turned on, and the first supply voltage that the first power supply ELVDD is provided is straight via the 9th transistor M9 as aging voltage
The anode for being applied to Organic Light Emitting Diode OLED is connect, aging is carried out to the Organic Light Emitting Diode OLED.
In the present embodiment, because the image element circuit 20 that the active matrix/organic light emitting display uses includes aging electricity
Road, the aging circuit is not only simple controllable, and wider aging voltage can be used to the Organic Light Emitting Diode
OLED carries out aging so that the aging effect of OLED is more preferably.
Moreover, the active matrix/organic light emitting display can judge the fail bit of pixel using the aging circuit
Put.Once the situation that pixel appearance point does not work, OLED failure or pixel electricity can be quickly judged by aging circuit
Fail on road 20.
To sum up, in image element circuit provided by the invention and active matrix/organic light emitting display, by the first power supply
The three scan line of 9th transistor and control the 9th transistor is set between the anode of OLED, formed simple
Controllable aging circuit, is thus applied to that the aging voltage at OLED both ends is unrestricted, and the aging effect of OLED is more
It is good.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Scope.
Claims (8)
- A kind of 1. image element circuit, it is characterised in that including：The first transistor, it is connected between data wire and first node, its grid is connected to the second scan line；Second transistor and the 4th strings of transistors are coupled between section point and the 3rd node, and its grid is all connected to the second scanning Line；Third transistor, it is connected between first node and the first power supply, its grid is connected to control line；5th transistor, it is connected between first node and the 3rd node, its grid is connected to section point；The strings of transistors of 6th transistor AND gate the 8th is coupled between section point and reference power source, and its grid is all connected to the first scanning Line；7th transistor is connected between the 3rd node and the anode of Organic Light Emitting Diode, and its grid is connected to control line；9th transistor, it is connected between the first power supply and the anode of Organic Light Emitting Diode, its grid is connected to the 3rd scanning Line；First capacitor, both ends are connected with the first power supply with section point respectively；Second capacitor, both ends are connected with the second scan line with section point respectively.
- 2. image element circuit as claimed in claim 1, it is characterised in that the negative electrode and second source of the Organic Light Emitting Diode Connection.
- 3. image element circuit as claimed in claim 2, it is characterised in that first power supply and second source are used as described organic The driving power of light emitting diode.
- 4. image element circuit as claimed in claim 2, it is characterised in that first power supply and second source are used as described organic The aging power supply of light emitting diode.
- 5. image element circuit as claimed in claim 1, it is characterised in that the first transistor, second transistor and the 4th are brilliant The second scanning signal that the conducting and cut-off of body pipe provide by second scan line controls, the third transistor and the 7th The control signal that the conducting and cut-off of transistor are provided by the control line controls, the 6th transistor and the 8th transistor The first scanning signal that conducting and cut-off provide by first scan line controls.
- 6. image element circuit as claimed in claim 1, it is characterised in that the conducting of the 9th transistor and cut-off are by described the The 3rd scanning signal control that three scan line provides.
- 7. image element circuit as claimed in claim 1, it is characterised in that the first transistor to the 9th transistor is film Transistor.
- 8. a kind of active matrix/organic light emitting display, it is characterised in that including as any one of claim 1 to 7 Image element circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610818006.9A CN107818754A (en) | 2016-09-12 | 2016-09-12 | Image element circuit and active matrix/organic light emitting display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610818006.9A CN107818754A (en) | 2016-09-12 | 2016-09-12 | Image element circuit and active matrix/organic light emitting display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107818754A true CN107818754A (en) | 2018-03-20 |
Family
ID=61601103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610818006.9A Pending CN107818754A (en) | 2016-09-12 | 2016-09-12 | Image element circuit and active matrix/organic light emitting display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021184897A1 (en) * | 2020-03-18 | 2021-09-23 | 京东方科技集团股份有限公司 | Pixel circuit and driving method therefor, and display apparatus |
| CN114373427A (en) * | 2022-01-26 | 2022-04-19 | 深圳市华星光电半导体显示技术有限公司 | OLED driving circuit, display panel, preparation method and display device |
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| US20080169460A1 (en) * | 2007-01-15 | 2008-07-17 | Jaeho Yoo | Organic light emitting diodes display and aging method thereof |
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| WO2021184897A1 (en) * | 2020-03-18 | 2021-09-23 | 京东方科技集团股份有限公司 | Pixel circuit and driving method therefor, and display apparatus |
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Application publication date: 20180320 |