CN107039004B - The aging compensation approach of AMOLED display panel - Google Patents
The aging compensation approach of AMOLED display panel Download PDFInfo
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- CN107039004B CN107039004B CN201710429360.7A CN201710429360A CN107039004B CN 107039004 B CN107039004 B CN 107039004B CN 201710429360 A CN201710429360 A CN 201710429360A CN 107039004 B CN107039004 B CN 107039004B
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of aging compensation approach of AMOLED display panel.This method passes through the K value for the driving thin film transistor (TFT) detected in advance and the data voltage after a precompensation is calculated in threshold voltage, and the cross-pressure at the Organic Light Emitting Diode both ends is detected using the data voltage after precompensation, the luminous efficiency of Organic Light Emitting Diode is obtained further according to the cross-pressure at Organic Light Emitting Diode both ends, finally show that final compensated data voltage driving AMOLED display panel is shown according to the luminous efficiency of Organic Light Emitting Diode, it can be simultaneously to the threshold voltage for driving thin film transistor (TFT), drive the K value of thin film transistor (TFT), and the aging of Organic Light Emitting Diode compensates, promote the display effect of AMOLED display panel.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of aging compensation approach of AMOLED display panel.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Display, OLED) display device has spontaneous
Light, driving voltage are low, luminous efficiency is high, the response time is short, clarity and contrast are high, nearly 180 ° of visual angles, use temperature ranges
Width is known as being the display for most having development potentiality by industry, it can be achieved that many advantages, such as Flexible Displays are with large area total colouring
Device.
OLED display according to driving method can be divided into passive matrix OLED (Passive Matrix OLED,
) and active array type OLED (Active Matrix OLED, AMOLED) two major classes, i.e. directly addressing and film crystal PMOLED
Manage two class of (Thin Film Transistor, TFT) matrix addressing.Wherein, AMOLED has the pixel in array arrangement, belongs to
In active display type, luminous efficacy is high, is typically used as large scale display device high-definition.
AMOLED display device is current driving apparatus, when there is electric current to flow through Organic Light Emitting Diode, organic light emission two
Pole tube light-emitting, and light emission luminance is determined by the electric current for flowing through Organic Light Emitting Diode itself.Most of existing integrated circuit
(Integrated Circuit, IC) all only transmits voltage signal, therefore the pixel-driving circuit of AMOLED needs to complete voltage
Signal is changed into the task of current signal.During the work time, AMOLED display device is easy to be driven the uniformity of TFT and steady
Qualitatively influence causes to show bad, and due to the aging of OLED itself, will also result in display brightness reduces and show image retention
Problem, it is therefore desirable to which the characteristic of driving TFT and the aging of OLED itself of AMOLED display device are compensated.It is existing
AMOLED display device be typically only capable to driving TFT threshold voltage (Vth) and driving TFT the intrinsic conduction factor (K value) into
Row compensates, and including but not limited to mobility [mu] in K value, can not compensate OLED itself because of aging bring brightness decline and image retention.
Further, each in AMOLED display device in the external compensation method of existing AMOLED display device
The pixel-driving circuit of a sub-pixel needs to be electrically connected to by detection signal line on detecting IC, usual each detection signal
Line corresponds to a column sub-pixel, and the output terminal number for detecting IC is equal with the number of detection signal line, and detecting IC also needs to have
The function that detection signal line is emptied to (floating) causes detecting IC sufficiently complex.
Summary of the invention
The purpose of the present invention is to provide a kind of aging compensation approach of AMOLED display panel, can be thin to driving simultaneously
The aging of the threshold voltage of film transistor, the K value for driving thin film transistor (TFT) and Organic Light Emitting Diode compensates, and is promoted
The display effect of AMOLED display panel.
To achieve the above object, the present invention provides a kind of aging compensation approach of AMOLED display panel, including it is as follows
Step:
Step S1, an AMOLED display panel is provided, comprising: believe in multiple sub-pixels of array distribution, a plurality of detecting
Number line, multiple switch unit and detecting IC；Corresponding each column sub-pixel is arranged one and is electrically connected with the column sub-pixel
Detection signal line, corresponding each detection signal line are arranged one and are electrically connected this detection signal line and detect the switch list of IC
Member；
Be equipped with pixel-driving circuit in each sub-pixel, the pixel-driving circuit include: first film transistor,
Second thin film transistor (TFT), third thin film transistor (TFT), storage capacitance and Organic Light Emitting Diode；
The grid of the first film transistor accesses scanning signal, source electrode incoming data signal, and drain electrode is electrically connected the
One node；The grid of second thin film transistor (TFT) is electrically connected first node, and source electrode is electrically connected second node, drain electrode access
Power supply positive voltage；The grid of the third thin film transistor (TFT) accesses detection control signal, and source electrode is electrically connected second node, drain electrode
It is electrically connected via the corresponding detection signal line of sub-pixel switch unit corresponding with the sub-pixel；The one of the storage capacitance
End is electrically connected first node, and the other end is electrically connected second node；The anode of the Organic Light Emitting Diode is electrically connected the
Two nodes, cathode access power reference voltage；
Step S2, aging detecting is carried out to the AMOLED display panel；
Wherein, the aging detecting process of each sub-pixel includes:
Data voltage after calculating sub-pixel precompensation, calculation formula are as follows:
Wherein, K0 is a reference value of the K value of preset second thin film transistor (TFT), and Vth is the sub- picture detected in advance
The actual value of the threshold voltage of the second thin film transistor (TFT) in element, K are the second film crystal in the sub-pixel detected in advance
The actual value of the K value of pipe, Vgs are the data voltage before sub-pixel compensation, and Vgs ' is the data electricity after sub-pixel precompensation
It presses, a reference value K0 of the K value of the second thin film transistor (TFT) of all sub-pixels is all the same in the AMOLED display panel；
Scanning signal and detection control signal control first and third thin film transistor (TFT) are opened, and are detectd described in switch unit control
The connection surveyed between signal wire and the detecting IC disconnects, and the data voltage after first node write pre-compensation, second node is write
Enter zero potential；
Scanning signal controls first film transistor and closes, and detection control signal controls third thin film transistor (TFT) and opens, and opens
It closes the connection that unit controls between the detection signal line and the detecting IC to disconnect, the current potential of second node is constantly lifted；
By preset duration, so that scanning signal controls first film transistor and closes after the current potential of second node is stablized
It closes, detection control signal controls third thin film transistor (TFT) and opens, and switch unit controls the detection signal line and the detecting IC
Between connection conducting, detecting IC detects the second node current potential, and the current potential of the second node is equal to the organic light emission
The cross-pressure at diode both ends；
Step S3, the luminous efficiency and organic light emission for indicating Organic Light Emitting Diode in the AMOLED display panel are read
The look-up table of the corresponding relationship of the cross-pressure at diode both ends, according to the cross-pressure at the Organic Light Emitting Diode both ends measured in step S2
The corresponding luminous efficiency of Organic Light Emitting Diode is searched, and calculates each sub-pixel finally compensated data voltage, and with each
Finally compensated data voltage driving AMOLED display panel is shown a sub-pixel；
Wherein, the calculation formula of the final compensated data voltage of each sub-pixel are as follows:
Wherein, Vgs " is the final compensated data voltage of the sub-pixel, b=η/η0, η is to measure according in step S2
Organic Light Emitting Diode both ends the corresponding luminous efficiency of Organic Light Emitting Diode that finds of cross-pressure, η0For organic light emission two
The initial light emission efficiency of pole pipe.
The detecting IC includes multiple inspection terminals, each inspection terminal is corresponding to be electrically connected at least one switch list
Member.
Each inspection terminal is corresponding to be electrically connected four switch units.
Each switch unit includes one the 4th thin film transistor (TFT), one control of grid access of the 4th thin film transistor (TFT)
Signal, source electrode are electrically connected the detecting IC, and drain electrode is electrically connected the corresponding detection signal line of the switch unit.
The grid for the 4th thin film transistor (TFT) being connected from the same inspection terminal accesses different control signals.
By the way that the AMOLED display panel is divided into multiple detecting blocks in the step S2, and by one by one to every
One detecting block carries out aging detecting, completes the aging to the AMOLED display panel and detects.
Obtaining in the step S3 indicates the luminous efficiency of Organic Light Emitting Diode in the AMOLED display panel and has
The process of the look-up table of the corresponding relationship of the cross-pressure at machine light emitting diode both ends specifically includes:
A test panel made with the AMOLED display panel provided in step S1 with batch is provided, to the test surfaces
Plate carries out burn-in test, acquires luminous efficiency and the Organic Light Emitting Diode both ends of the Organic Light Emitting Diode in the test panel
Cross-pressure corresponding relationship, according to the luminous efficiency and Organic Light Emitting Diode of the Organic Light Emitting Diode in the test panel
The corresponding relationship production of the cross-pressure at both ends indicates the luminous efficiency of Organic Light Emitting Diode in the AMOLED display panel and has
The look-up table of the corresponding relationship of the cross-pressure at machine light emitting diode both ends.
Indicate the luminous efficiency of Organic Light Emitting Diode and Organic Light Emitting Diode both ends in the AMOLED display panel
The look-up table of corresponding relationship of cross-pressure be stored in external sequence controller corresponding with the AMOLED display panel.
Beneficial effects of the present invention: the present invention provides a kind of aging compensation approach of AMOLED display panel, and this method is logical
Data voltage after a precompensation is calculated in the K value and threshold voltage of the driving thin film transistor (TFT) detected in advance, and utilize
Data voltage after precompensation detects the cross-pressure at the Organic Light Emitting Diode both ends, further according to Organic Light Emitting Diode both ends
Cross-pressure obtains the luminous efficiency of Organic Light Emitting Diode, finally obtains final compensation according to the luminous efficiency of Organic Light Emitting Diode
Data voltage afterwards drives AMOLED display panel to be shown, threshold voltage, drive that can simultaneously to thin film transistor (TFT) is driven
The K value of dynamic thin film transistor (TFT) and the aging of Organic Light Emitting Diode compensate, and promote the display effect of AMOLED display panel
Fruit.
Detailed description of the invention
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed
Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is the detection switch and pixel circuit connection relationship of the aging compensation approach of AMOLED display panel of the invention
Schematic diagram；
Fig. 2 is the pixel equivalent circuit of the aging compensation approach of AMOLED display panel of the invention and detection switch, detects
Survey the schematic diagram of chip；
Fig. 3 is the reconnaissance phase waveform for OLED cross-pressure of the aging compensation approach of AMOLED display panel of the invention
Figure；
Fig. 4 is that the OLED cross-pressure of the aging compensation approach of AMOLED display panel of the invention and luminous efficiency relationship are illustrated
Figure；
Fig. 5 is the flow chart of the aging compensation approach of AMOLED display panel of the invention.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example and its attached drawing are described in detail.
Referring to Fig. 5, the present invention provides a kind of aging compensation approach of AMOLED display panel, include the following steps:
Step S1, Fig. 1 and Fig. 2 are please referred to, an AMOLED display panel is provided, comprising: the multiple sons being distributed in array
Pixel 1, a plurality of detection signal line 4, multiple switch unit 2 and detecting IC3；Corresponding each column sub-pixel 1 is arranged one and should
The detection signal line 4 that column sub-pixel 1 is electrically connected, corresponding the setting of each detection signal line 4 one is electrically connected this and detects
It surveys signal wire 4 and detects the switch unit 2 of IC3；
Pixel-driving circuit is equipped in each sub-pixel 1, the pixel-driving circuit includes: first film transistor
T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, storage capacitance CS and Organic Light Emitting Diode D1；
The grid of the first film transistor T1 accesses scanning signal SCAN, source electrode incoming data signal DATA, drain electrode
It is electrically connected first node G；The grid of the second thin film transistor (TFT) T2 is electrically connected first node G, and source electrode is electrically connected the
Two node S, drain electrode access power supply positive voltage ELVDD；The grid of the third thin film transistor (TFT) T3 accesses detection control signal
SEN, source electrode are electrically connected second node S, drain corresponding with the sub-pixel 1 via the corresponding detection signal line 4 of sub-pixel 1
Switch unit 2 is electrically connected；One end of the storage capacitance CS is electrically connected first node G, and the other end is electrically connected the second section
Point S；The anode of the Organic Light Emitting Diode D1 is electrically connected second node S, and cathode accesses power reference voltage ELVSS.
Specifically, the detecting IC3 includes multiple inspection terminals, each inspection terminal is corresponding to be electrically connected at least one
Switch unit 2, it is preferable that each inspection terminal is corresponding to be electrically connected four switch units 2.
Specifically, each switch unit 2 includes one the 4th thin film transistor (TFT) T4, the grid of the 4th thin film transistor (TFT) T4
One control signal SW of pole access, source electrode are electrically connected the detecting IC3, and drain electrode is electrically connected the corresponding detecting of switch unit 2
Signal wire 4.
Preferably, the grid for the 4th thin film transistor (TFT) T4 being connected from the same inspection terminal accesses different control signals
SW。
Specifically, in a preferred embodiment of the invention, every a line sub-pixel 1 in the AMOLED display panel wraps
It includes: being repeated in red sub-pixel, green sub-pixels, blue subpixels and the white pixel of arrangement, and the sub- picture of same row
The color of element 1 is identical, and each inspection terminal of the detecting IC3 is corresponding to be electrically connected four switch units 2, this four switches
Unit 2 is connected respectively the detection signal line 2 being electrically connected with a column red sub-pixel, electrically connects with a column green sub-pixels
The detection signal line 2 that connects, the detection signal line 2 being electrically connected with a column blue subpixels electrically connect with a column white sub-pixels
The detection signal line 2 connect, four switch units 2 be respectively connected to four different control signal SW (such as SW1, SW2, SW3,
SW4), so that four switch units 2 are in only one conducting of same time, the corresponding switch of sub-pixel 1 of same color is single
The identical control signal SW of 2 access of member.
Step S2, referring to Fig. 3, carrying out aging detecting to the AMOLED display panel；
Wherein, the aging detecting process of each sub-pixel 1 includes:
Data voltage after calculating the sub-pixel 1 precompensation, calculation formula are as follows:
Wherein, K0 is a reference value of the K value of preset second thin film transistor (TFT) T2, and Vth is the son detected in advance
The actual value of the threshold voltage of the second thin film transistor (TFT) T2 in pixel 1, K are second thin in the sub-pixel 1 detected in advance
The actual value of the K value of film transistor T2, Vgs are the data voltage before the sub-pixel 1 compensation, and Vgs ' is the sub-pixel 1 precompensation
Data voltage afterwards.
It is emphasized that the K value of the second thin film transistor (TFT) T2 of all sub-pixels 1 in the AMOLED display panel
A reference value K0 is all the same namely a reference value K0 of all K values of the second thin film transistor (TFT) T2 in the AMOLED display panel is
Unique value.
Scanning signal SCAN and detection control signal SEN control first and third thin film transistor (TFT) T1, T3 are opened, and switch is single
Connection between 2 control of the member detection signal line 4 and the detecting IC3 disconnects, the data after first node G write pre-compensation
Zero potential is written in voltage, second node S；
Scanning signal SCAN controls first film transistor T1 and closes, and detection control signal SEN controls third film crystal
Pipe T3 is opened, and the connection that switch unit 2 controls between the detection signal line 4 and the detecting IC3 disconnects, second node S's
Current potential is constantly lifted；
By preset duration, so that scanning signal SCAN controls the first film crystal after the current potential of second node S is stablized
Pipe T1 is closed, and detection control signal SEN controls third thin film transistor (TFT) T3 and opens, and switch unit 2 controls the detection signal line 4
Connection between the detecting IC3 is connected, and detecting IC3 detects the second node S current potential, the current potential of the second node S
Equal to the cross-pressure at the both ends the Organic Light Emitting Diode D1.
Specifically, in above-mentioned the preferred embodiment of the present invention, by the multiple sub-pixel 1 in the step 2
The mode progressively scanned carries out aging detecting, the control by different control signal SW to switch unit 2, to same a line
The sub-pixel 1 of different colours is detected one by one in sub-pixel 1, for example, controlling open corresponding with the red sub-pixel first
It closes unit 2 to be connected, aging detecting is carried out to each red sub-pixel, then controls switch corresponding with the green sub-pixels again
Unit 2 is connected, and carries out aging detecting to each green sub-pixels, it is single then to control switch corresponding with the blue subpixels again
Member 2 is connected, and carries out aging detecting to each blue subpixels, then controls switch unit corresponding with the white sub-pixels again
2 conductings carry out aging detecting to each white sub-pixels, and then complete the aging detecting of a line sub-pixel 1.
Further, it in order to reduce the influence that IR-drop (supply voltage decline) detects aging, is gone back in the step S2
Can be by the way that the AMOLED display panel be divided into multiple detecting blocks, and carried out by detecting block to each one by one
Aging detecting is completed the aging to the AMOLED display panel and is detected.
Step S3, referring to Fig. 4, reading the luminous efficiency for indicating Organic Light Emitting Diode in the AMOLED display panel
With the look-up table of the corresponding relationship of the cross-pressure at Organic Light Emitting Diode both ends, according to the Organic Light Emitting Diode measured in step S2
The cross-pressure at the both ends D1 searches the corresponding luminous efficiency of Organic Light Emitting Diode D1, and it is final compensated to calculate each sub-pixel 1
Data voltage, and shown with the final compensated data voltage driving AMOLED display panel of each sub-pixel 1；
Wherein, the calculation formula of the final compensated data voltage of each sub-pixel 1 are as follows:
Wherein, Vgs " is the final compensated data voltage of the sub-pixel 1, b=η/η0, η is to survey according in step S2
The corresponding luminous efficiency of Organic Light Emitting Diode D1 that the cross-pressure at the both ends Organic Light Emitting Diode D1 obtained is found, η0It is organic
The initial light emission efficiency of light emitting diode D1.
Specifically, the organic light emission two for newly dispatching from the factory also without the AMOLED display screen used, in each sub-pixel
The initial light emission efficiency η of pole pipe0Consistency is very high.
Specifically, the luminous effect for indicating Organic Light Emitting Diode in the AMOLED display panel is obtained in the step S3
The process of the look-up table of the corresponding relationship of the cross-pressure at rate and Organic Light Emitting Diode both ends specifically includes:
A test panel made with the AMOLED display panel provided in step S1 with batch is provided, to the test surfaces
Plate carries out burn-in test, acquires luminous efficiency and the Organic Light Emitting Diode both ends of the Organic Light Emitting Diode in the test panel
Cross-pressure corresponding relationship, according to the luminous efficiency and Organic Light Emitting Diode of the Organic Light Emitting Diode in the test panel
The corresponding relationship production of the cross-pressure at both ends indicates the luminous efficiency of Organic Light Emitting Diode in the AMOLED display panel and has
The look-up table of the corresponding relationship of the cross-pressure at machine light emitting diode both ends.
Further, the luminous efficiency and organic light emission two of Organic Light Emitting Diode in the AMOLED display panel are indicated
The look-up table of the corresponding relationship of the cross-pressure at pole pipe both ends can be reserved in external timing control corresponding with the AMOLED display panel
In device processed, in order to the calling at any time during the AMOLED display panel compensation of ageing.
It should be noted that according to the current formula of Organic Light Emitting Diode it is found that being shown by AMOLED of the invention
After the aging compensation approach compensation of panel:
L=η I "=η0K0Vgs2
Wherein I " is the electric current by the compensated Organic Light Emitting Diode D1 of aging compensation approach of the invention, and L is warp
Cross the brightness of the compensated Organic Light Emitting Diode D1 of aging compensation approach of the invention, it is seen then that mend by aging of the invention
After compensation method compensation, the brightness of Organic Light Emitting Diode D1 and current luminous efficiency, the driving film of Organic Light Emitting Diode D1
The threshold voltage of transistor and the K value of driving thin film transistor (TFT) are unrelated, i.e., simultaneously to the threshold value electricity of driving thin film transistor (TFT)
The aging of pressure, the K value of driving thin film transistor (TFT) and Organic Light Emitting Diode is compensated.
In conclusion the present invention provides a kind of aging compensation approach of AMOLED display panel, this method by detecing in advance
The data voltage after a precompensation is calculated in the K value and threshold voltage of the driving thin film transistor (TFT) of survey, and after utilization precompensation
Data voltage detect the cross-pressure at the Organic Light Emitting Diode both ends, obtained further according to the cross-pressure at Organic Light Emitting Diode both ends
The luminous efficiency of Organic Light Emitting Diode finally obtains final compensated data according to the luminous efficiency of Organic Light Emitting Diode
Voltage drives AMOLED display panel to be shown, can be brilliant to the threshold voltage, the driving film that drive thin film transistor (TFT) simultaneously
The K value of body pipe and the aging of Organic Light Emitting Diode compensate, and promote the display effect of AMOLED display panel.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the claims in the present invention
Protection scope.
Claims (8)
1. a kind of aging compensation approach of AMOLED display panel, which comprises the steps of:
Step S1, an AMOLED display panel is provided, comprising: in multiple sub-pixels (1) of array distribution, a plurality of detection signal
Line (4), multiple switch unit (2) and detecting IC (3)；One and the column sub-pixel is arranged in corresponding each column sub-pixel (1)
(1) the detection signal line (4) being electrically connected, corresponding each detection signal line (4) are arranged one and are electrically connected this detecting
Signal wire (4) and the switch unit (2) for detecting IC (3)；
It is equipped with pixel-driving circuit in each sub-pixel (1), the pixel-driving circuit includes: first film transistor
(T1), the second thin film transistor (TFT) (T2), third thin film transistor (TFT) (T3), storage capacitance (CS) and Organic Light Emitting Diode
(D1)；
The grid of the first film transistor (T1) accesses scanning signal (SCAN), source electrode incoming data signal (DATA), leakage
Pole is electrically connected first node (G)；The grid of second thin film transistor (TFT) (T2) is electrically connected first node (G), source electrode electricity
Property connection second node (S), drain electrode access power supply positive voltage (ELVDD)；The grid of the third thin film transistor (TFT) (T3) accesses
Detection control signal (SEN), source electrode are electrically connected second node (S), drain via the corresponding detection signal line of sub-pixel (1)
(4) switch unit (2) corresponding with sub-pixel (1) is electrically connected；One end of the storage capacitance (CS) is electrically connected first
Node (G), the other end are electrically connected second node (S)；The anode of the Organic Light Emitting Diode (D1) is electrically connected the second section
Point (S), cathode access power reference voltage (ELVSS)；
Step S2, aging detecting is carried out to the AMOLED display panel；
Wherein, the aging detecting process of each sub-pixel (1) includes:
Data voltage after calculating the sub-pixel (1) precompensation, calculation formula are as follows:
Wherein, K0 is a reference value of the K value of preset second thin film transistor (TFT) (T2), and Vth is the sub- picture detected in advance
The actual value of the threshold voltage of the second thin film transistor (TFT) (T2) in plain (1), K are the in the sub-pixel (1) detected in advance
The actual value of the K value of two thin film transistor (TFT)s (T2), Vgs are the data voltage before the sub-pixel (1) compensation, and Vgs ' is the sub-pixel
(1) data voltage after pre-compensating for, the second thin film transistor (TFT) (T2) of all sub-pixels (1) in the AMOLED display panel
The a reference value K0 of K value is all the same；
Scanning signal (SCAN) and detection control signal (SEN) control first and third thin film transistor (TFT) (T1, T3) are opened, switch
The connection that unit (2) controls between the detection signal line (4) and detecting IC (3) disconnects, and first node (G) write-in is pre- to mend
Zero potential is written in data voltage after repaying, second node (S)；
Scanning signal (SCAN) controls first film transistor (T1) and closes, and it is brilliant that detection control signal (SEN) controls third film
Body pipe (T3) is opened, and the connection that switch unit (2) controls between the detection signal line (4) and detecting IC (3) disconnects, the
The current potential of two nodes (S) is constantly lifted；
By preset duration, so that scanning signal (SCAN) controls the first film crystal after the current potential of second node (S) is stablized
It manages (T1) to close, detection control signal (SEN) controls third thin film transistor (TFT) (T3) and opens, and detects described in switch unit (2) control
The connection surveyed between signal wire (4) and detecting IC (3) is connected, and second node (S) current potential, institute are detected in detecting IC (3)
The current potential for stating second node (S) is equal to the cross-pressure at the both ends the Organic Light Emitting Diode (D1)；
Step S3, the luminous efficiency and organic light-emitting diodes for indicating Organic Light Emitting Diode in the AMOLED display panel are read
The look-up table of the corresponding relationship of the cross-pressure at pipe both ends, according to the cross-pressure at the both ends Organic Light Emitting Diode (D1) measured in step S2
Organic Light Emitting Diode (D1) corresponding luminous efficiency is searched, and calculates the final compensated data voltage of each sub-pixel (1),
And it is shown with the final compensated data voltage driving AMOLED display panel of each sub-pixel (1)；
Wherein, the calculation formula of the final compensated data voltage of each sub-pixel (1) are as follows:
Wherein, Vgs " is the final compensated data voltage of the sub-pixel (1), b=η/η0, η measures according in step S2
The corresponding luminous efficiency of Organic Light Emitting Diode (D1) that the cross-pressure at the both ends Organic Light Emitting Diode (D1) is found, η0It is organic
The initial light emission efficiency of light emitting diode (D1).
2. the aging compensation approach of AMOLED display panel as described in claim 1, which is characterized in that the detecting IC (3)
Including multiple inspection terminals, each inspection terminal is corresponding to be electrically connected an at least switch unit (2).
3. the aging compensation approach of AMOLED display panel as claimed in claim 2, which is characterized in that each inspection terminal
It is corresponding to be electrically connected four switch units (2).
4. the aging compensation approach of AMOLED display panel as claimed in claim 2, which is characterized in that each switch unit
It (2) include one the 4th thin film transistor (TFT) (T4), one control signal (SW) of grid access of the 4th thin film transistor (TFT) (T4), source
Pole is electrically connected the detecting IC (3), and drain electrode is electrically connected the corresponding detection signal line (4) of the switch unit (2).
5. the aging compensation approach of AMOLED display panel as claimed in claim 4, which is characterized in that with the same sense terminal
The grid of the 4th connected thin film transistor (TFT) (T4) of son accesses different control signals (SW).
6. the aging compensation approach of AMOLED display panel as described in claim 1, which is characterized in that lead in the step S2
It crosses and the AMOLED display panel is divided into multiple detecting blocks, and detectd by carrying out aging to each detecting block one by one
It surveys, completes the aging to the AMOLED display panel and detect.
7. the aging compensation approach of AMOLED display panel as described in claim 1, which is characterized in that obtained in the step S3
Taking indicates the luminous efficiency of Organic Light Emitting Diode and the cross-pressure at Organic Light Emitting Diode both ends in the AMOLED display panel
The process of look-up table of corresponding relationship specifically include:
One test panel made with the AMOLED display panel that provides in step S1 with batch is provided, to the test panel into
Row burn-in test, acquire the Organic Light Emitting Diode in the test panel luminous efficiency and Organic Light Emitting Diode both ends across
The corresponding relationship of pressure, according to the luminous efficiency of the Organic Light Emitting Diode in the test panel and Organic Light Emitting Diode both ends
The corresponding relationship production of cross-pressure indicate the luminous efficiency of Organic Light Emitting Diode and organic hair in the AMOLED display panel
The look-up table of the corresponding relationship of the cross-pressure at optical diode both ends.
8. the aging compensation approach of AMOLED display panel as described in claim 1, which is characterized in that indicate the AMOLED
The lookup of the corresponding relationship of the cross-pressure at the luminous efficiency of Organic Light Emitting Diode and Organic Light Emitting Diode both ends in display panel
Table is stored in external sequence controller corresponding with the AMOLED display panel.
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