CN109637408A - AMOLED panel and its method for detecting - Google Patents
AMOLED panel and its method for detecting Download PDFInfo
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- CN109637408A CN109637408A CN201910115048.XA CN201910115048A CN109637408A CN 109637408 A CN109637408 A CN 109637408A CN 201910115048 A CN201910115048 A CN 201910115048A CN 109637408 A CN109637408 A CN 109637408A
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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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- 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]
- G09G3/3225—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] using an active matrix
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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]
- G09G3/3225—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] using an active matrix
- G09G3/3258—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] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to a kind of AMOLED panel and its method for detecting.The AMOLED panel includes: that each column AMOLED pixel is correspondingly provided with the detection lines longitudinally extended along panel, the upper end of the detection lines connects the first source electrode driver, the lower end of the detection lines connects the second source electrode driver, which connects the AMOLED pixel-driving circuit of each AMOLED pixel in column AMOLED pixel in effective display area one by one；The corresponding detection lines of odd column AMOLED pixel are equipped with first switching element and second switch element；The corresponding detection lines of even column AMOLED pixel are equipped with third switch element and the 4th switch element；The first switching element and the 4th switch element are controlled by first switch signal to open simultaneously or close, the second switch element and third switch element are opened simultaneously or are closed by the control of second switch signal, when detecting, threshold voltage is alternately detected by the first source electrode driver and the second source electrode driver.AMOLED panel and its method for detecting of the invention can reduce the detecting error of threshold voltage.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of AMOLED panel and its method for detecting.
Background technique
Organic Light Emitting Diode (OLED) display device has self-luminous, and driving voltage is low, and luminous efficiency is high, the response time
It is short, it many advantages, such as use temperature range is wide, is known as being the display device for most having development potentiality by industry.
OLED display panel 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 PMOLED.Wherein, AMOLED panel has
In the pixel that array is arranged, belong to active display type, luminous efficacy is high, commonly used in large scale high-definition display dress
It sets.
AMOLED occupies panel industry middle and high-end market, and consumer is higher and higher to the requirement of its resolution, when parsing is spent
Gao Shi, since size limits, panel side is not distributed all source electrode drivers (Source Driver), common source drive
The solution of device distribution is that two sides are distributed source electrode driver to panel up and down, and are separately connected odd column pixel and even column picture
Element.
It is a kind of existing AMOLED panel source electrode driver distribution schematic diagram referring to Fig. 1.AMOLED panel 1 has
The pixel 2 of array arrangement, about 1 two sides of AMOLED panel are respectively equipped with source electrode driver-above and under source electrode driver-, source
Driver-above connects and drives the pixel 2 of even column, such as the pixel B of secondary series the first row, and source electrode driver-is lower to be connected
And drive the pixel 2 of odd column, such as the pixel A of first row the first row.
Referring to fig. 2, illustrate for the connection relationship of source electrode driver in a kind of existing AMOLED panel and AMOLED pixel
Figure, source electrode driver-above connect and drive the pixel 3 of even column, the pixel 3 of odd column is connected and driven under source electrode driver-,
Each pixel 3 by multiple sub-pixel groups at, such as in Fig. 2 pixel 3 include tetra- sub-pixels of RGBW.About source electrode driver with
The connection relationship of AMOLED pixel is illustrated so that source electrode driver-is lower as an example, source electrode driver-it is lower by data line D1~
D4 and detection lines (Sensing Line) S1 is separately connected each sub-pixel of first row pixel 3, passes through data line D5~D8
And detection lines S2 is separately connected each sub-pixel of third column pixel 3.
Referring to Fig. 3, for a kind of existing AMOLED pixel-driving circuit schematic diagram with detecting function, the AMOLED
Pixel-driving circuit specifically include that first film transistor T1, as driving thin film transistor (TFT) the second thin film transistor (TFT) T2, the
Three thin film transistor (TFT) T3, first capacitor Cst, the second capacitor Csen and Organic Light Emitting Diode D1；The AMOLED pixel driver
Circuit realizes that detecting function, circuit for detecting are electric from AMOLED pixel driver by detection lines by detection lines connection sensing circuit
Road obtains detecting voltage Vsamp, and with reference to Fig. 2, circuit for detecting be may include in source electrode driver, utilizes detecting voltage Vsamp
The threshold voltage vt h that can compensate for the second thin film transistor (TFT) T2 drives thin since AMOLED panel is current-driven display
The uniformity and stability of film transistor will affect display effect, by the threshold voltage vt h for compensating the second thin film transistor (TFT) T2
Display quality can be promoted.
The grid of first film transistor T1 connects the first scanning signal WR, and source electrode and drain electrode is separately connected data-signal
Data-signal Data is transferred to by Data and first node g, first film transistor T1 under the control of the first scanning signal WR
The grid of second thin film transistor (TFT) T2；The grid of second thin film transistor (TFT) T2 connects first node g, and source electrode and drain electrode is separately connected
Second node s and power supply high voltage VDD；The grid of third thin film transistor (TFT) T3 connects the second scanning signal RD, source electrode and drain electrode
It is separately connected second node s and detection lines；The both ends of first capacitor Cst are separately connected first node g and second node s；Second
The both ends of capacitor Csen are separately connected detection lines and ground connection；The anode of Organic Light Emitting Diode D1 connects second node s, and cathode connects
Meet power supply low-voltage VSS.
The impedance of detection lines itself includes the effective display area for being fanned out to (Fanout) impedance R1 and detection lines of detection lines
(AA) impedance R2, closer apart from source electrode driver, effective display area impedance R2 is smaller.
Circuit for detecting mainly includes detecting pin ADC and reference voltage output terminal；It detects pin ADC and passes through first switch K1
Detection lines are connected, detecting pin ADC is connect by first switch K1 under the control of detection signal samp with detection lines, draws detecting
Foot ADC can obtain detecting voltage Vsamp from AMOLED pixel-driving circuit by detection lines, and detecting pin ADC can be further
It is connect with analog to digital conversion circuit to convert detecting voltage Vsamp；Reference voltage output terminal passes through second switch K2 connection detection lines,
Reference voltage output terminal is connect by second switch K2 under the control of control signal sen_pre with detection lines, keeps reference voltage defeated
Outlet can be by detection lines to AMOLED pixel-driving circuit output reference voltage Vref.
Referring to fig. 4 and Fig. 5, Fig. 4 be Fig. 3 AMOLED pixel-driving circuit threshold voltage vt h detect time diagram,
Fig. 5 is the threshold voltage vt h detecting result schematic diagram of the AMOLED pixel-driving circuit of Fig. 3.As shown in Figure 4, in threshold voltage
Reconnaissance phase, the voltage Vs of pixel A, pixel B at second node s start to climb, and threshold voltage is detected, and circuit for detecting is logical
When crossing detecting pin ADC sampling, electric current levels off to 0 in detection lines, at this time it is believed that detecting voltage Vsamp is equal to voltage Vs；By
In closer apart from source electrode driver, the effective display area impedance R2 of detection lines is smaller, thus same detection lines connected it is same
The impedance of column pixel to source electrode driver is inconsistent；The difference of effective display area impedance R2 will affect the climbing speed of voltage Vs,
Lead between the odd column and even column pixels of same a line that there are errors, such as pixel A, pixel B by voltage Vs, to influence threshold value
Voltage Vth detecting result；The error for indicating the threshold voltage vt h detecting result of panel different location pixel in Fig. 5 with gray scale, by
Panel or more two sides must be arranged in source electrode driver, therefore the threshold voltage vt h for resulting in AMOLED pixel-driving circuit is detectd
The error of result is surveyed, under the conditions of same detecting, the threshold voltage detecting result of pixel A is smaller than pixel B.
Summary of the invention
Therefore, the purpose of the present invention is to provide a kind of AMOLED panel and its method for detecting, reduce due to source drive
Device two sides above and below panel are distributed caused AMOLED driving circuit threshold voltage and detect error.
To achieve the above object, the present invention provides a kind of AMOLED panels, including being located at the first source electrode above panel
Driver, positioned at the second source electrode driver of below the panel, and in the effective display area of panel in the more of matrix array arrangement
A AMOLED pixel；Each column AMOLED pixel is correspondingly provided with the detection lines longitudinally extended along panel, the detection lines it is upper
The first source electrode driver of end connection, the lower ends of the detection lines connect the second source electrode driver, the detection lines effective display area by
In a connection column AMOLED pixel AMOLED pixel-driving circuit of each AMOLED pixel with by the first source electrode driver or
Second source electrode driver detects the threshold voltage in each AMOLED pixel-driving circuit；Odd column AMOLED pixel is corresponding to detect
Survey line is equipped with the control detection lines upper end and connect the first switching element of on-off with the first source electrode driver, and controls the detecting
Line lower end connect the second switch element of on-off with the second source electrode driver；The corresponding detection lines of even column AMOLED pixel are equipped with
Control the third switch element that the detection lines upper end connect on-off with the first source electrode driver, and control the detection lines lower end with
4th switch element of the second source electrode driver connection on-off；The first switching element and the 4th switch element are by first switch
Signal is controlled to open simultaneously or close, and the second switch element and third switch element are controlled simultaneously by second switch signal
It opens or closes, when detecting, each AMOLED pixel driver is alternately detected by the first source electrode driver and the second source electrode driver
Threshold voltage in circuit.
Wherein, the first switching element, second switch element, third switch element and the 4th switch element are film
Transistor, the first switch signal and second switch signal input the grid of corresponding thin film transistor (TFT).
Wherein, the AMOLED pixel includes tetra- sub-pixels of RGBW.
Wherein, the end of adjacent odd column and corresponding two detection lines of even column AMOLED pixel links together.
Wherein, the AMOLED pixel-driving circuit includes: first film transistor, grid connection the first scanning letter
Number, source electrode and drain electrode is separately connected data-signal and first node；Second thin film transistor (TFT), grid connect first node, source
Pole and drain electrode are separately connected second node and power supply high voltage；Third thin film transistor (TFT), grid connect the second scanning signal, source
Pole and drain electrode are separately connected second node and detection lines；First capacitor, both ends are separately connected first node and second node；The
Two capacitors, both ends are separately connected detection lines and ground connection；Organic Light Emitting Diode, anode connect second node, cathode connection
Power supply low-voltage.
Wherein, first source electrode driver and the second source electrode driver are respectively provided with the detecting electricity of connection detection lines
Road, the circuit for detecting include detecting pin and reference voltage output terminal；It detects pin and detection lines is connected by first switch, the
One switch under the control of detection signal will detecting pin connect conducting with detection lines so that detect pin pass through detection lines from
AMOLED pixel-driving circuit obtains detecting voltage；Reference voltage output terminal connects detection lines, second switch by second switch
Reference voltage output terminal is connect with detection lines under control of the control signal so that reference voltage output terminal by detection lines to
AMOLED pixel-driving circuit output reference voltage.
Wherein, the detecting pin is further connect to convert detecting voltage with analog to digital conversion circuit.
The present invention also provides the method for detecting of above-mentioned AMOLED panel, comprising:
Second switch signal control second switch element and third switch element are opened, first switch signal control the
One switch element and the 4th switch element are closed；The each AMOLED pixel-driving circuit of odd column is detected by the second source electrode driver
First threshold voltage, by the first source electrode driver detecting each AMOLED pixel-driving circuit of even column second threshold electricity
Pressure；
Second switch signal control second switch element and third switch element are closed, first switch signal control the
One switch element and the 4th switch element are opened；The each AMOLED pixel-driving circuit of even column is detected by the second source electrode driver
Third threshold voltage, by the first source electrode driver detecting each AMOLED pixel-driving circuit of odd column the 4th threshold value electricity
Pressure；
Calculate the first threshold voltage of each AMOLED pixel-driving circuit of odd column and the average value of the 4th threshold voltage
As the threshold voltage detecting result of each AMOLED pixel-driving circuit of odd column, calculates each AMOLED pixel of even column and drive
The second threshold voltage of dynamic circuit and the average value of third threshold voltage are as each AMOLED pixel-driving circuit of even column
Threshold voltage detecting result
To sum up, AMOLED panel of the invention and its method for detecting are detected using the source electrode driver of upper and lower two sides respectively
AMOLED driving circuit threshold voltage takes the average value of detecting result twice to miss as final detecting result to reduce detecting
Difference.
Detailed description of the invention
With reference to the accompanying drawing, by the way that detailed description of specific embodiments of the present invention, technical solution of the present invention will be made
And other beneficial effects are apparent.
In attached drawing,
Fig. 1 is a kind of existing AMOLED panel source electrode driver distribution schematic diagram；
Fig. 2 is the connection relationship diagram of source electrode driver and AMOLED pixel in a kind of existing AMOLED panel；
Fig. 3 is a kind of existing AMOLED pixel-driving circuit schematic diagram with detecting function；
Fig. 4 is that the threshold voltage vt h of the AMOLED pixel-driving circuit of Fig. 3 detects time diagram；
Fig. 5 is the threshold voltage vt h detecting result schematic diagram of the AMOLED pixel-driving circuit of Fig. 3；
Fig. 6 is the structural schematic diagram of one preferred embodiment of AMOLED panel of the present invention；
Fig. 7 is the flow chart of one preferred embodiment of AMOLED panel method for detecting of the present invention.
Specific embodiment
It is the structural schematic diagram of one preferred embodiment of AMOLED panel of the present invention referring to Fig. 6, the AMOLED panel is main
It include: on the first source electrode driver i.e. source electrode driver-above panel, positioned at the second source electrode driver of below the panel
I.e. under source electrode driver-, and in the effective display area of panel in multiple AMOLED pixels 4,5 of matrix array arrangement；It is each
Column AMOLED pixel be correspondingly provided with the detection lines 41 or 51 longitudinally extended along panel, the detection lines 41 or 51 upper end connection
First source electrode driver, the lower ends of the detection lines connect the second source electrode driver, the detection lines 41 or 51 effective display area by
The AMOLED pixel-driving circuit of each AMOLED pixel 4 or 5 is by the first source drive in a connection column AMOLED pixel
Device or the second source electrode driver detect the threshold voltage in each AMOLED pixel-driving circuit；Odd column AMOLED pixel is corresponding
Detection lines 41 be equipped with and control 41 upper end of detection lines and connect the first switching element T11 of on-off with the first source electrode driver, with
And control the second switch element T12 that 41 lower end of detection lines connect on-off with the second source electrode driver；Even column AMOLED picture
The corresponding detection lines 51 of element, which are equipped with, controls the third switch element that 51 upper end of detection lines connect on-off with the first source electrode driver
T13, and control the 4th switch element T14 that 51 lower end of detection lines connect on-off with the second source electrode driver；Described first
Switch element T11 and the 4th switch element T14 is controlled by first switch signal SW1 to open simultaneously or close, and described second opens
It closes element T12 and third switch element T13 to be opened simultaneously or closed by second switch signal SW2 control, when detecting, by the first source
Driver and the second source electrode driver alternately detect the threshold voltage in each AMOLED pixel-driving circuit.
In this preferred embodiment, first switching element T11, second switch element T12, third switch element T13 and
4th switch element T14 can use thin film transistor (TFT), and first switch signal SW1 and second switch signal SW2 input are corresponding
The grid of thin film transistor (TFT).AMOLED pixel 4,5 may include tetra- sub-pixels of RGBW, similar to the dot structure in Fig. 2,
It can be using other dot structures；In addition, only denote detection lines 41 and 51 in Fig. 6, be omitted connection source electrode driver with
The data line of pixel or sub-pixel.In Fig. 6, adjacent odd column and corresponding two detection lines 41 of even column AMOLED pixel
End with 51 links together, two upper ends of detection lines 41 and 51 link together after with connect on source electrode driver-, lower end
With the lower connection of source electrode driver-after linking together, in this embodiment, circuit for detecting is contained in source electrode driver, detecting
Line 41 and 51 can connect to circuit for detecting same in source electrode driver.
The detection lines of the source electrode driver for focusing on upper and lower two sides of AMOLED panel of the present invention with adjacent odd even
Pixel is connected, and respectively by switch control, odd column pixel or even column pixels is optionally detected, by using upper
Lower two sides source electrode driver detects the threshold voltage vt h of the driving thin film transistor (TFT) in pixel-driving circuit, and uses average value
As final detecting result, to reduce the detecting error of threshold voltage vt h；It present invention can be suitably applied to various needs detecting drivings
The AMOLED pixel-driving circuit structure of thin film transistor (TFT) threshold voltage.
It is illustrated by taking AMOLED pixel-driving circuit shown in Fig. 3 as an example below, in this embodiment, AMOLED picture
Plain driving circuit specifically includes that
First film transistor T1, as driving thin film transistor (TFT) the second thin film transistor (TFT) T2, third thin film transistor (TFT)
T3, first capacitor Cst, the second capacitor Csen and Organic Light Emitting Diode D1；The AMOLED pixel-driving circuit passes through detecting
Line connection sensing circuit is to realize that detecting function, circuit for detecting obtain detecting electricity from AMOLED pixel-driving circuit by detection lines
Press Vsamp.The grid of first film transistor T1 connects the first scanning signal WR, and source electrode and drain electrode is separately connected data-signal
Data-signal Data is transferred to by Data and first node g, first film transistor T1 under the control of the first scanning signal WR
The grid of second thin film transistor (TFT) T2；The grid of second thin film transistor (TFT) T2 connects first node g, and source electrode and drain electrode is separately connected
Second node s and power supply high voltage VDD；The grid of third thin film transistor (TFT) T3 connects the second scanning signal RD, source electrode and drain electrode
It is separately connected second node s and detection lines；The both ends of first capacitor Cst are separately connected first node g and second node s；Second
The both ends of capacitor Csen are separately connected detection lines and ground connection；The anode of Organic Light Emitting Diode D1 connects second node s, and cathode connects
Meet power supply low-voltage VSS.
Circuit for detecting may include in source electrode driver, AMOLED panel the first source electrode driver of two sides and the up and down
Two source electrode drivers can be respectively provided with the circuit for detecting of connection detection lines, and referring to Fig. 3, main includes detecting pin ADC
And reference voltage output terminal；Pin ADC is detected by first switch K1 connection detection lines, first switch K1 is in detection signal samp
Control under detecting pin ADC is connect with detection lines, allow detecting pin ADC by detection lines from AMOLED pixel driver
Circuit obtains detecting voltage Vsamp, and detecting pin ADC can be further connect to convert detecting voltage with analog to digital conversion circuit
Vsamp；Reference voltage output terminal passes through second switch K2 connection detection lines, control of the second switch K2 in control signal sen_pre
Reference voltage output terminal is connect with detection lines under system, drives reference voltage output terminal to AMOLED pixel by detection lines
Dynamic circuit output reference voltage Vref.
Based on AMOLED panel of the invention, the present invention also provides corresponding threshold voltage method for detecting, in conjunction with Fig. 6,
And the flow chart of one preferred embodiment of AMOLED panel method for detecting of the present invention shown in Fig. 7, this method specifically include that
Firstly, second switch signal SW2 control second switch element T12 and third switch element T13 is opened, first switch
Signal SW1 controls first switching element T11 and the 4th switch element T14 and closes；It is every by the second source electrode driver detecting odd column
The first threshold voltage of a AMOLED pixel-driving circuit, can be denoted as Vth_o1, detect even column by the first source electrode driver
The second threshold voltage of each AMOLED pixel-driving circuit, can be denoted as Vth_e1；
Next, second switch signal SW2 control second switch element T12 and third switch element T13 is closed, first is opened
OFF signal controls SW1 first switching element T11 and the 4th switch element T14 and opens；Even column is detected by the second source electrode driver
The third threshold voltage of each AMOLED pixel-driving circuit, can be denoted as Vth_e2, detect odd column by the first source electrode driver
4th threshold voltage of each AMOLED pixel-driving circuit, can be denoted as Vth_o2；
The first threshold voltage of each AMOLED pixel-driving circuit of odd column and the average value of the 4th threshold voltage are calculated,
It can be denoted as Vth_o, as the threshold voltage detecting result of each AMOLED pixel-driving circuit of odd column, it is each to calculate even column
The second threshold voltage of AMOLED pixel-driving circuit and the average value of third threshold voltage, can be denoted as Vth_e, as even column
The threshold voltage detecting result of each AMOLED pixel-driving circuit；Namely Vth_o=(Vth_o1+Vth_o2)/2, Vth_e
=(Vth_e1+Vth_e2)/2.
The method for detecting of AMOLED panel of the invention uses the source electrode driver of upper and lower sides to detect AMOLED panel respectively
The corresponding threshold voltage vt h of each pixel uses the detecting result twice of each pixel to average and detects as threshold voltage vt h
As a result, to reduce threshold voltage vt h detecting error.
To sum up, AMOLED panel of the invention and its method for detecting are detected using the source electrode driver of upper and lower two sides respectively
AMOLED driving circuit threshold voltage takes the average value of detecting result twice to miss as final detecting result to reduce detecting
Difference.
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 appended right of the present invention
It is required that protection scope.
Claims (8)
1. a kind of AMOLED panel, which is characterized in that including being located at the first source electrode driver above panel, be located at below the panel
The second source electrode driver, and the effective display area of panel be in matrix array arrangement multiple AMOLED pixels；Each column
AMOLED pixel is correspondingly provided with the detection lines longitudinally extended along panel, and the upper end of the detection lines connects the first source drive
The lower end of device, the detection lines connects the second source electrode driver, which connects column AMOLED picture in effective display area one by one
The AMOLED pixel-driving circuit of each AMOLED pixel is by the first source electrode driver or the detecting of the second source electrode driver in element
Threshold voltage in each AMOLED pixel-driving circuit；The corresponding detection lines of odd column AMOLED pixel, which are equipped with, controls the detecting
Line upper end connect the first switching element of on-off with the first source electrode driver, and controls the detection lines lower end and the drive of the second source electrode
The second switch element of dynamic device connection on-off；The corresponding detection lines of even column AMOLED pixel be equipped with control the detection lines upper end with
First source electrode driver connects the third switch element of on-off, and controls the detection lines lower end and connect with the second source electrode driver
4th switch element of on-off；The first switching element and the 4th switch element are controlled by first switch signal to open simultaneously
Or close, the second switch element and third switch element are opened simultaneously or are closed by the control of second switch signal, when detecting,
The threshold voltage in each AMOLED pixel-driving circuit is alternately detected by the first source electrode driver and the second source electrode driver.
2. AMOLED panel as described in claim 1, which is characterized in that the first switching element, second switch element,
Three switch elements and the 4th switch element are thin film transistor (TFT), and the first switch signal and the input of second switch signal are corresponding
Thin film transistor (TFT) grid.
3. AMOLED panel as described in claim 1, which is characterized in that the AMOLED pixel includes tetra- sub- pictures of RGBW
Element.
4. AMOLED panel as described in claim 1, which is characterized in that adjacent odd column and even column AMOLED pixel pair
The end for two detection lines answered links together.
5. AMOLED panel as described in claim 1, which is characterized in that the AMOLED pixel-driving circuit includes: first
Thin film transistor (TFT) (T1), grid connect the first scanning signal (WR), source electrode and drain electrode be separately connected data-signal (Data) and
First node (g)；Second thin film transistor (TFT) (T2), grid connect first node (g), and source electrode and drain electrode is separately connected the second section
Point (s) and power supply high voltage (VDD)；Third thin film transistor (TFT) (T3), grid connect the second scanning signal (RD), source electrode and leakage
Pole is separately connected second node (s) and detection lines；First capacitor (Cst), both ends are separately connected first node (g) and the second section
Point (s)；Second capacitor (Csen), both ends are separately connected detection lines and ground connection；Organic Light Emitting Diode (D1), anode connection
Second node (s), cathode connect power supply low-voltage (VSS).
6. AMOLED panel as described in claim 1, which is characterized in that first source electrode driver and the second source drive
Device is respectively provided with the circuit for detecting of connection detection lines, and the circuit for detecting includes that detecting pin (ADC) and reference voltage are defeated
Outlet；It detects pin (ADC) and detection lines, control of the first switch (K1) in detection signal (samp) is connected by first switch (K1)
System is lower to connect conducting with detection lines for detecting pin (ADC), so that detecting pin (ADC) is driven by detection lines from AMOLED pixel
Dynamic circuit obtains detecting voltage；Reference voltage output terminal connects detection lines by second switch (K2), and second switch (K2) is being controlled
Reference voltage output terminal is connect with detection lines under the control of signal (sen_pre) processed, so that reference voltage output terminal is by detecing
Survey line is to AMOLED pixel-driving circuit output reference voltage (Vref).
7. AMOLED panel as claimed in claim 6, which is characterized in that the detecting pin (ADC) further turns with modulus
Circuit connection is changed to convert detecting voltage.
8. a kind of method for detecting of AMOLED panel as described in claim 1 characterized by comprising
The second switch signal control second switch element and third switch element are opened, and first switch signal control first is opened
It closes element and the 4th switch element is closed；By the of the second source electrode driver detecting each AMOLED pixel-driving circuit of odd column
One threshold voltage, by the second threshold voltage of the first source electrode driver detecting each AMOLED pixel-driving circuit of even column；
The second switch signal control second switch element and third switch element are closed, and first switch signal control first is opened
It closes element and the 4th switch element is opened；By the of the second source electrode driver detecting each AMOLED pixel-driving circuit of even column
Three threshold voltages, by the 4th threshold voltage of the first source electrode driver detecting each AMOLED pixel-driving circuit of odd column；
Calculate the first threshold voltage of each AMOLED pixel-driving circuit of odd column and the average value conduct of the 4th threshold voltage
The threshold voltage detecting result of each AMOLED pixel-driving circuit of odd column calculates each AMOLED pixel driver electricity of even column
The threshold value of the second threshold voltage on road and the average value of third threshold voltage as each AMOLED pixel-driving circuit of even column
Detecting voltage result.
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