CN110473501A - A kind of compensation method of display panel - Google Patents
A kind of compensation method of display panel Download PDFInfo
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- CN110473501A CN110473501A CN201910812497.XA CN201910812497A CN110473501A CN 110473501 A CN110473501 A CN 110473501A CN 201910812497 A CN201910812497 A CN 201910812497A CN 110473501 A CN110473501 A CN 110473501A
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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]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
Abstract
The embodiment of the present application provides a kind of compensation method of display panel pixel compensation circuit, and pixel compensation circuit includes concatenated power supply signal end, driving transistor, organic illuminating element and electrode signal end；The power supply signal end electric connection of power supply signal wire；The compensation method includes that the pixel compensation circuit is driven to enter the compensation of ageing stage；First node current potential is read in the compensation of ageing stage；The first node is set between the driving transistor and the organic illuminating element；Also, the first power supply signal is provided to the power signal line in the compensation of ageing stage, first power supply signal is alternate level.The application is jumped by the first power supply signal, reduces the charging time in compensation of ageing stage, is shortened the detecting period, is improved the efficiency of compensation of ageing.
Description
[technical field]
The present invention relates to field of display technology more particularly to a kind of compensation methodes of display panel.
[background technique]
As consumption upgrades, car-mounted display product is gradually converted to organic light emission (OLED) display panel, but due to OLED
Device aging, becomes and applies difficult point threshold voltage (Vth) drift.Automobile is updated unlike mobile phone than very fast, so for a long time,
After applied at elevated temperature, display effect is significantly deteriorated, and at this moment needs to carry out compensation of ageing to OLED display panel.And due to detection lines
Upper load is larger, and the charging time can be grown very much, causes the detecting period longer, greatly reduces the efficiency of compensation of ageing.
[summary of the invention]
In view of this, being asked the embodiment of the invention provides a kind of compensation method of display panel to solve above-mentioned technology
Topic.
The application provides a kind of display panel compensation method, comprising: pixel compensation circuit include concatenated power supply signal end,
Drive transistor, organic illuminating element and electrode signal end；The power supply signal end electric connection of power supply signal wire；The compensation side
Method includes that the pixel compensation circuit is driven to enter the compensation of ageing stage；First node electricity is read in the compensation of ageing stage
Position；The first node is set between the driving transistor and the organic illuminating element；Also, in the compensation of ageing
Stage provides the first power supply signal to the power signal line, and first power supply signal is alternate level.The application passes through the
The jump of one power supply signal, reduces the charging time in compensation of ageing stage, shortens the detecting period, improves the efficiency of compensation of ageing.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the schematic diagram of one embodiment display panel of the application；
Fig. 2 is the schematic diagram of the pixel compensation circuit of one embodiment of the application；
Fig. 3 is the compensation of ageing time diagram of Fig. 2 embodiment；
Fig. 4 is the node potential schematic diagram of the application one embodiment；
Fig. 5 is the node potential schematic diagram of another embodiment of the application；
Fig. 6 is the schematic diagram of the pixel compensation circuit of another embodiment of the application；
Fig. 7 is the compensation of ageing time diagram of Fig. 6 embodiment；
Fig. 8 is the threshold compensation time diagram of Fig. 6 embodiment；
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though power supply electricity may be described using term first, second, third, etc. in embodiments of the present invention
Pressure, but these supply voltages should not necessarily be limited by these terms.These terms are only used to for supply voltage being distinguished from each other out.For example, In
In the case where not departing from range of embodiment of the invention, the first supply voltage can also be referred to as second source voltage, similarly, the
Two supply voltages can also be referred to as the first supply voltage.
As stated in the background art, it needs on the OLED product that such as automobile needs to be used for a long time in this way to display panel
OLED device carries out compensation of ageing.First have to OLED device charge to reach equilibrium state (OLED device is equivalent to one
Capacitor, it is exactly to reach equilibrium state that capacitor, which is full of).Compensation of ageing process needs to be connected to detection lines by driving chip IC
OLED device could charge to it.And detection lines are due to can be with other devices of display panel for cabling inside display panel, example
Scan line, data line, other signal wires of reference signal line in such as pixel circuit is overlapping to generate parasitic capacitance.IC is generated
Electric current flow through all capacitors on cabling, to after being filled on cabling could again give OLED device charge, due to above
Reason, so that the charging time is too long, it usually needs 6ms.By taking the display panel of 720*1920 as an example, when scanning used in 720 rows
Between be 6ms*720, then be equivalent to frequency be 1000ms/ (6ms*720) ≈ 0.23Hz, this be far below consumer's acceptable
Frequency substantially reduces the efficiency of detecting, is unfavorable for entire detecting process.
The application provides a kind of compensation method of pixel compensation circuit, for solving above-mentioned technical problem.Please refer to Fig. 1 and
Fig. 2, Fig. 1 are the schematic diagram of one embodiment display panel of the application；Fig. 2 is the pixel compensation of one embodiment of the application
The schematic diagram of circuit；
Referring to FIG. 1, the display panel of the application includes viewing area AA and the non-display area NA around viewing area, further include
It is set to the pixel compensation circuit of viewing area AA.Referring to FIG. 2, pixel compensation circuit include concatenated power supply signal end PVDD,
Drive transistor DT, organic illuminating element OLED and electrode signal end PVEE；Power supply signal end PVDD electric connection of power supply signal wire
Vdd；
The compensation method includes that the pixel compensation circuit 10 is driven to enter the compensation of ageing stage；It is driven in the compensation of ageing stage
Chip IC reads first node N1 current potential by detection lines Sense；First node N1 is set to driving transistor DT and organic
Between light-emitting component OLED；Also, the first power supply signal VDD is provided to power signal line Vdd in the compensation of ageing stage, described the
One power supply signal VDD is alternate level.
The application is by being arranged to alternate level for the first power supply signal VDD in the compensation of ageing stage, so that the first power supply
Signal VDD is jumped, to give posting between the first power signal line Vdd and display panel other elements by coupling
Raw capacitor charging, reduces the time charged in reconnaissance phase, the detection lines Sense of IC to parasitic capacitance, and then improves old
Change the efficiency of detecting.Inventor is obtained by analog simulation, under identical other conditions, the first power supply signal VDD of fixed voltage
For 4.6v, the time of aging detecting is 6ms；When the first power supply signal VDD for being changed to alternate level jumps to 4.95v from 4.6v
When, the aging detecting time is reduced to 4.5~4.9ms, reduces nearly 25%.
Specifically, Fig. 3 is the compensation of ageing time diagram of Fig. 2 embodiment please continue to refer to Fig. 2~Fig. 4；Fig. 4 is this
Apply for the node potential schematic diagram of one embodiment；
For the pixel compensation circuit described in Fig. 2, which includes driving transistor DT, is set to driving
The power supply signal end PVDD of the first pole transistor DT；The organic illuminating element OLED being electrically connected with driving the second pole transistor DT；
The data writing transistor T1 being connect with driving transistor DT grid；Connection and driving transistor DT grid and power supply signal end
Storage capacitance CST between PVDD；And it is connected to the detection transistor between detection lines Sense and organic illuminating element OLED
T8.Wherein the tie point of detection transistor T8 and organic illuminating element OLED is first node N1.
In the lighting timings of pixel compensation circuit, in the luminous preparation stage, the conducting of data writing transistor T1 first will
The grid of data-signal write driver transistor DT；In light emitting phase, the cut-off of data writing transistor, data-signal passes through storage
Capacitor CST is stored in the grid i.e. second node N2 of driving transistor.It should be noted that Fig. 2 is only example one
Pixel compensation circuit, the pixel compensation circuit and its working stage of the application are not limited to this.
With continued reference to FIG. 3, the compensation of ageing stage includes reseting stage P1 in the compensation of ageing stage, charging balance rank
Section P2 and reconnaissance phase P3；
In the compensated stage of a pixel column, resetting current is provided to first node N1 in reseting stage P1；So that every time
Detecting be all can control variable as far as possible since identical starting point so that detecting result it is more accurate.For not
Accurate aging detecting result, which compensates, cannot not only compensate organic illuminating element aging bring display exception, instead can be right
It shows that result causes to deteriorate.In order to enable the result of aging detecting is more accurate, either detected before detecting starts every time
It needs to reset the first node N1 being electrically connected with organic illuminating element after terminating；
Reference current I is provided to first node N1 in charging equilibrium stage P2baseSo that organic illuminating element OLED reaches
Balance；The principle that organic illuminating element OLED aging is detected in this motion is to provide electric current for organic illuminating element OLED, and test has
The I-V characteristic of machine light-emitting component judges the degree of aging of organic illuminating element OLED by the drift of I-V characteristic.And this Shen
Principle please is to give the accurately reference current I of organic illuminating element OELD mono-base, to detect voltage to obtain its I-V spy
Property.And inventor has found later by numerous studies, the organic illuminating element OLED prepared in organic light emitting display panel is folded
Layer structure.Hole class functional layer is provided between anode and cathode, shine layer function and electrical type functional layer.Cathode, anode with
Functional layer between and be equivalent to capacitor pole plate and between dielectric layer, therefore, organic illuminating element OLED is equivalent to one
Capacitor.Need " capacitor " to organic illuminating element OLED fully charged before being detected, therefore, present inventor is to benefit
The stage of repaying adds a charging equilibrium stage, obtains accurate I-V characteristic.
First node N1 current potential is read in reconnaissance phase P3；Since the electrode signal end of organic illuminating element OLED is set as
Electrode signal VEE, according to the electrode signal of the current potential of the first node N1 of detecting and the other end of organic illuminating element OLED
VEE, and provide reference current obtain organic illuminating element OLED I-V characteristic, according to the I-V characteristic of detecting be stored in
Initial I-V characteristic in IC obtains the aging conditions of organic illuminating element OLED more afterwards, uses for subsequent compensation.
The level of first power supply signal VDD charge equilibrium stage P2 start when jump or charging equilibrium stage P2 it
Preceding jump.Due to the presence of parasitic capacitance on detection lines Sense, reference current IbaseCharging rate it is very slow, cause aging to be detectd
Survey inefficiency.The application is jumped by the jump when the equilibrium stage P2 that charges starts or before the equilibrium stage P2 that charges,
So that the first power supply signal VDD is jumped, thus by coupling to the first power signal line Vdd and display panel other
Parasitic capacitance charging between element, reduces the time charged in reconnaissance phase, the detection lines sense of IC to parasitic capacitance,
And then improve the efficiency of aging detecting.
Specifically, the level of the first power supply signal VDD jumps to second source voltage VDD2 by the first supply voltage VDD1；
Second source voltage VDD2 is greater than the first supply voltage VDD1；Second source voltage VDD2 and the difference of electrode signal VEE are less than
The threshold voltage of organic illuminating element OLED.Wherein the threshold voltage of OLED be can make organic illuminating element OLED open it is bright most
Small voltage.Reference current is reduced to organic hair by second source voltage VDD2 and the first supply voltage VDD1 difference in the application
The charging time of optical element OLED.The voltage of its bigger coupling of one side difference is bigger, then the efficiency promoted is more；Another party
Face, the first power supply signal VDD is excessively high, and to will lead to organic illuminating element OLED bright steathily.Second source voltage VDD2 is arranged in the present embodiment
It is less than the threshold voltage of organic illuminating element OLED with the difference of electrode signal VEE, it is ensured that in reseting stage P1, charging balance rank
The difference of section P2 and reconnaissance phase P3 the first power supply signal VDD and electrode signal VEE not will lead to organic illuminating element OLED and steal
It is bright.
Due to only having the first power supply signal VDD just to can be reduced reference current from lower level jump for higher level
Charging time.But the first power supply signal VDD high jump to the difference of electrode signal VEE be equal to organic illuminating element OLED threshold
It can not just be further continued for high jump when threshold voltage, it is bright steathily otherwise to will appear organic illuminating element OLED.Therefore it needs first
Power supply signal VDD is set as jumping between the first supply voltage VDD1 and second source voltage VDD2.And in order not to allow first
Power supply signal causes from second source voltage VDD2 jump to reduce the current potential of first node N1 when the first supply voltage VDD1
Charging time increases, and in the present embodiment, starts after reconnaissance phase P3 completes detecting and in next pixel column reseting stage P1
Between, the level of the first power supply signal jumps back the first supply voltage VDD1 by second source voltage VDD2.A side is arranged such
Face makes first node current potential turn down setting after detecting, does not influence to detect；It on the other hand can be quick by reseting stage
It eliminates the first supply voltage and jumps low bring influence.
In order to further reduce the time of charging equilibrium stage, the efficiency of aging detecting is promoted.In the benefit of a pixel column
It repays in the stage, charging equilibrium stage P2 includes the first charging equilibrium stage P21 and the second charging equilibrium stage P22；It is filled first
Electric equilibrium stage P21 provides preliminary filling electric current Ipre, preliminary filling electric current IpreGreater than reference current Ibase.The present embodiment passes through preliminary filling electric current
IpreIt is first charged with high current to parasitic capacitance, then will be the progress of benchmark electric current by the current balance type of organic illuminating element OLED
Aging detecting.The time that aging detecting is greatly reduced while guaranteeing aging detecting accuracy, improve aging detecting
Efficiency.
Specifically, preliminary filling electric current IpreAbsolute value be more than or equal to three times reference current IbaseAbsolute value.Due to benchmark
Electric current IbaseIt is the Naan order of magnitude, and reference current I to the electric current very little that detection lines sense chargesbaseIt is that driving chip IC is mentioned
It supplies, charging ability is weaker.Therefore lesser preliminary filling electric current is set the effect for shortening the charging time is not achieved.The present embodiment setting
Preliminary filling electric current be 3 times of benchmark electric current or more can guarantee aging detect accuracy while greatly reduce aging detect when
Between, improve the efficiency of aging detecting.
Further, preliminary filling electric current IpreCharging time is too long will lead to it is overcharged so that the parasitism of detection lines sense
Capacitor carries out back discharge, the first node N1 detected to organic illuminating element OLED in reference current charging and reconnaissance phase
Voltage is not the corresponding voltage of reference current, and the aging conditions of the organic illuminating element OLED detected are inaccurate, so as to cause
The compensation of ageing of mistake.Therefore, the present embodiment is realized to arrive simultaneously again in order to avoid the above problem promotes detecting efficiency, the first charging
Equilibrium stage P21 continues first time t1；Second charging equilibrium stage P22 continues the second time t2；First time t1 be less than etc.
In the half of the second time t2, to avoid overcharging.
It further, is the pixel compensation circuit of another embodiment of the application please continue to refer to Fig. 6~Fig. 8, Fig. 6
Schematic diagram；Fig. 7 is the compensation of ageing time diagram of Fig. 6 embodiment；Fig. 8 is the threshold compensation time diagram of Fig. 6 embodiment；
Pixel compensation circuit includes: detection signal end Vsense, and is set to detection signal end Vsense and first node
Detection transistor T8 between N1.Detect signal end Vsense connection detection lines Sense.
Detection transistor T8 is controlled by detection control signal VS；In reseting stage P1, charging equilibrium stage P2 and detecting rank
Section P3, driving transistor DT cut-off；In the present embodiment, transistor DT is driven to be in off state in the timing of compensation of ageing,
It avoids generating driving current and influencing the result that aging is detected.
In reseting stage P1, detection control signal VS provide significant level, detects signal end Vsense to the first segment
Point N1 provides resetting current；Organic illuminating element OLED is resetted by resetting current, so that aging detecting is organic every time
Light-emitting component OLED is since identical state, and then the result detected is more accurate.
In charging equilibrium stage P2, detection control signal VS provide significant level, detects signal end Vsense to first segment
Point N1 provides reference current；Stable reference current I is provided for organic illuminating element OLEDbase。
In reconnaissance phase P3, detection control signal VS provide significant level, detects first node N1 signal.According to benchmark electricity
The voltage of stream detecting organic illuminating element OLED and is stored in driving core to obtain the I-V characteristic of organic illuminating element OLED
Initial I-V characteristic in piece IC compares, and judges the degree of aging of organic illuminating element OLED, and then compensate to it.
Specifically, pixel compensation circuit includes: first be set between power supply signal end PVDD and driving transistor DT
Light emitting control transistor T3；
Data signal end DATA, and it is set to the direct data write-in crystal of data signal end DATA and driving transistor DT
Pipe T1；
Drive the second light emitting control transistor T4 between transistor DT and organic illuminating element OLED；
Initializing signal end VREF, and be set to initializing signal end VREF and drive the grid between transistor DT grid
Initialization transistor T6；The anode initialization transistor T2 being set between initializing signal end VREF and first node N1；
The compensation transistor T5 being set between driving the first pole transistor DT and grid.
In the present embodiment, detection transistor T8 is directly connected in organic illuminating element OLED, reference current write-in and aging
Detecting needs not move through an any other transistor, can to avoid other transistors Vgs-Ids characteristic for reference current and
Detect the change of voltage.
Further, detection transistor T8 is controlled by detection control signal VS；First light emitting control transistor T3 and second
Light emitting control transistor T4 is controlled by LED control signal EMIT；Grid initialization transistor T6 and anode initialization transistor T2
It is controlled by the first scanning signal SA；Data writing transistor T1 and compensation transistor T5 are controlled by the second scanning signal SB；
In compensation of ageing timing,
In reseting stage P1, charging equilibrium stage P2 and reconnaissance phase P3, the first scanning signal SA, the second scanning signal SB
Cut-off level is provided with LED control signal EMIT；In the present embodiment, other than detecting transistor T8, driving transistor DT,
Grid initialization transistor T6, anode initialization transistor T2, the first light emitting control transistor T3, the second light emitting control transistor
T4, data writing transistor T1 compensate transistor T5 and are in off state in the timing of compensation of ageing, avoid generating driving electricity
Flow and influence the result of aging detecting.Also the Vgs-Ids characteristic of other transistors is avoided for reference current and detects voltage
Change.
In reseting stage P1, detection control signal VS provide significant level, detects signal end Vsense to first node N1
Resetting current is provided；Organic illuminating element OLED is resetted by resetting current, so that organic light emission is detected in aging every time
Element OLED is since identical state, and then the result detected is more accurate.
In charging equilibrium stage P2, detection control signal VS provide significant level, detects signal end Vsense to first segment
Point N1 provides reference current；Stable reference current is provided for organic illuminating element OLED.
In reconnaissance phase P3, detection control signal VS provide significant level, detects first node signal.According to reference current
The voltage for detecting organic illuminating element OLED and is stored in driving chip to obtain the I-V characteristic of organic illuminating element OLED
Initial I-V characteristic in IC compares, and judges the degree of aging of organic illuminating element OLED, and then compensate to it.
Further, compensation method further includes the threshold compensation stage:
The threshold compensation stage includes initial phase P4, threshold value stage of gripping P5 and light emitting phase P6；
In initial phase P4, threshold value stage of gripping P5 and light emitting phase P6, detection control signal VS provide cut-off level
Make to detect transistor T8 cut-off；
Conduction level, the second scanning signal SB and light emitting control letter are provided in initial phase P4, the first scanning signal SA
Number EMIT provides cut-off level, and grid initialization transistor t6 conducting makes to drive transistor DT initialization；It should be noted that this
In significant level refer to can its another control transistor level in the conductive state, such as the pmos type light sensation in Fig. 6
In driving circuit, significant level refers to low level.Initializing signal Vref is transferred to driving transistor DT so that driving crystal
Pipe DT resets.
Conduction level, the first scanning signal SA and light emitting control are provided in threshold value stage of gripping P5, the second scanning signal SB
Signal EMIT provides cut-off level；Data writing transistor T1 and compensation transistor T5 conducting drives data-signal write-in
The grid of dynamic transistor DT simultaneously completes self compensation；At the same time, anode initialization transistor T2 is connected, and initializing signal is transferred to
Organic illuminating element OLED resets organic illuminating element OLED.Data-signal passes through the first of data writing transistor T1
Pole, driving transistor DT and compensation transistor T5 are transferred to the grid of driving transistor DT, and it is brilliant will to be stored in driving last moment
The current potential Vref of body tube grid is raised, and drives transistor 40 when driving the current potential of transistor gate is VDATA-Vth
It closes, driving the current potential of the grid storage of transistor at this time is VDATA-Vth, and wherein Vth is the threshold voltage for driving transistor.
Due to the technological reason of transistor manufacture, even if meeting identical technological parameter when manufacturing transistor, the crystalline substance on display panel
The threshold voltage of body pipe is not also identical, and with the increase for using the time, its threshold voltage can also be sent out after transistor ageing
Raw drift, this result in identical data-signal is written it is different in the different position brightness of display panel, and when using therewith
Between increase, it is different to be written the brightness that same data-signal can also show, it is uneven to have resulted in display, color drift.Therefore, originally
The threshold voltage for driving transistor DT is grabbed and stores the grid of driving transistor by embodiment, to eliminate threshold voltage
Influence for light emission luminance.
In the light emitting phase P6, LED control signal EMIT provides conduction level, the first scanning signal SA and second is swept
It retouches signal SB and cut-off level is provided；Driving transistor DT generates driving current and organic illuminating element OLED is made to shine.First hair
Photocontrol transistor T3 conducting, the first power supply signal VDD is transferred to the first pole of driving transistor DT so that driving transistor DT
Generate driving current；Driving current is transferred to organic illuminating element OLED by the second light emitting control transistor T4 conducting.Wherein, it drives
Driving current Ids=1/2Cox μ * W/L* (Vsg-Vth) the ^2=1/2Cox μ * W/L* (VDD- that dynamic transistor DT is generated
(VDATA-Vth)-Vth) ^2=1/2Cox μ * W/L* (VDD-VDATA) ^2.As can be seen that by the benefit of data write-in period P5
It repays, the glow current of the present embodiment depends on the data-signal of write-in, and it is uncorrelated to the driving threshold voltage of transistor DT, because
This, eliminates the influence that drive transistor threshold voltage is inhomogenous and drift is for glow current.
Referring to FIG. 1, a kind of display panel and display device is also disclosed in the application.The display panel display apparatus of the application
It may include compensation method as described above.The including but not limited to display of cellular mobile phone, tablet computer, computer
Device, applied in intelligent wearable device display, applied to display device on the vehicles such as automobile etc..As long as display
Device contains compensation method included by display device disclosed in the present application, be just contemplated as falling within the application protection scope it
It is interior.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (12)
1. a kind of compensation method of pixel compensation circuit, which is characterized in that the pixel compensation circuit includes concatenated power supply letter
Number end, driving transistor, organic illuminating element and electrode signal end；The power supply signal end electric connection of power supply signal wire；
The compensation method includes that the pixel compensation circuit is driven to enter the compensation of ageing stage；It is read in the compensation of ageing stage
Take first node current potential；The first node is set between the driving transistor and the organic illuminating element；Also, In
The compensation of ageing stage provides the first power supply signal to the power signal line, and first power supply signal is alternate level.
2. compensation method according to claim 1, which is characterized in that
The compensation of ageing stage includes reseting stage, and charge equilibrium stage and reconnaissance phase；
In the compensated stage of a pixel column, resetting current is provided to the first node in the reseting stage；It is filled described
The electric equilibrium stage provides reference current so that the organic illuminating element reaches balance to the first node；In the detecting rank
Section reads the first node current potential；
The level of first power supply signal jumps when the charging equilibrium stage starts or in the charging equilibrium stage
It jumps before.
3. compensation method according to claim 2, which is characterized in that
The level of first power supply signal jumps to second source voltage by the first supply voltage；The second source voltage is big
In first supply voltage；The difference of the second source voltage and the electrode signal is less than the organic illuminating element
Threshold voltage.
4. compensation method according to claim 3, which is characterized in that
After the reconnaissance phase completes detecting and between next pixel column reseting stage starts, first power supply signal
Level by the second source voltage jump return the first supply voltage.
5. compensation method according to claim 2, which is characterized in that
In the compensated stage of a pixel column, the charging equilibrium stage includes the first charging equilibrium stage and the second charging balance
Stage；
Preliminary filling electric current is provided in the first charging equilibrium stage, the preliminary filling electric current is greater than the reference current.
6. compensation method according to claim 5, which is characterized in that
The absolute value of the preliminary filling electric current is more than or equal to the absolute value of the reference current of three times.
7. compensation method according to claim 5, which is characterized in that
The first charging equilibrium stage continues at the first time；The second charging equilibrium stage continued for the second time；Described
One time was less than or equal to the half of second time.
8. compensation method according to claim 1, which is characterized in that the pixel compensation circuit includes: detection signal end,
And the detection transistor being set between the detection signal end and the first node；The detection signal end connection detecting
Line.
9. compensation method according to claim 8, which is characterized in that the pixel compensation circuit includes:
The detection transistor is controlled by detection control signal；In the reseting stage, the charging equilibrium stage and described detect
Survey stage, the driving transistor cutoff；
In the reseting stage, the detection control signal provides significant level, and the detection signal end is to the first node
Resetting current is provided；
In the charging equilibrium stage, the detection control signal provides significant level, and the detection signal end is to described first
Node provides reference current；
In the reconnaissance phase, the detection control signal provides significant level, detects the first node signal.
10. compensation method according to claim 8, which is characterized in that the pixel compensation circuit includes:
The first light emitting control transistor being set between the power supply signal end and the driving transistor；
Data signal end, and it is set to the data signal end and the direct data writing transistor of driving transistor；
The second light emitting control transistor between the driving transistor and the organic illuminating element；
Initializing signal end, and the grid being set between the initializing signal end and the driving transistor gate initialize
Transistor；The anode initialization transistor being set between the initializing signal end and the first node；Be set to institute
State the compensation transistor between driving the first pole of transistor and grid.
11. compensation method according to claim 10, which is characterized in that the detection transistor is controlled by detection control letter
Number；The first light emitting control transistor and the second light emitting control transistor are controlled by LED control signal；The grid
Initialization transistor and the anode initialization transistor are controlled by the first scanning signal；The data writing transistor and described
Compensation transistor is controlled by the second scanning signal；
In the reseting stage, the charging equilibrium stage and the reconnaissance phase, first scanning signal, described second are swept
It retouches signal and the LED control signal provides cut-off level；
In the reseting stage, the detection control signal provides significant level, and the detection signal end is to the first node
Resetting current is provided；
In the charging equilibrium stage, the detection control signal provides significant level, and the detection signal end is to described first
Node provides reference current；
In the reconnaissance phase, the detection control signal provides significant level, detects the first node signal.
12. compensation method according to claim 11, which is characterized in that the compensation method further includes threshold compensation rank
Section:
The threshold compensation stage includes initial phase, threshold value stage of gripping and light emitting phase；
In the initial phase, the threshold value stage of gripping and the light emitting phase, the detection control signal provides cut-off
Level makes the detection transistor cutoff；
In the initial phase, first scanning signal provides conduction level, second scanning signal and described shines
It controls signal and cut-off level is provided；The grid initialization transistor conducting initializes the driving transistor；
In the threshold value stage of gripping, second scanning signal provides conduction level, first scanning signal and the hair
Optical control signal provides cut-off level；The data writing transistor and the compensation transistor turns, are written data-signal
It drives the grid of transistor and completes self compensation；
In the light emitting phase, the LED control signal provides conduction level, first scanning signal and described second is swept
It retouches signal and cut-off level is provided；The driving transistor generates driving current and the organic illuminating element is made to shine.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992878A (en) * | 2019-11-28 | 2020-04-10 | 上海天马有机发光显示技术有限公司 | Display panel, compensation method thereof and display device |
| CN111312129A (en) * | 2020-02-28 | 2020-06-19 | 京东方科技集团股份有限公司 | Pixel circuit, light-emitting device aging detection and compensation method and display substrate |
| CN111445852A (en) * | 2020-05-06 | 2020-07-24 | Oppo广东移动通信有限公司 | Pixel compensation circuit, display device and compensation method |
| CN112863428A (en) * | 2021-01-25 | 2021-05-28 | 京东方科技集团股份有限公司 | Pixel circuit, driving method, display panel and display device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104575382A (en) * | 2015-01-06 | 2015-04-29 | 昆山国显光电有限公司 | Aging compensation system and method for OLED component |
| CN105139790A (en) * | 2015-10-09 | 2015-12-09 | 青岛海信电器股份有限公司 | OLED display aging detection method and display device |
| US9384698B2 (en) * | 2009-11-30 | 2016-07-05 | Ignis Innovation Inc. | System and methods for aging compensation in AMOLED displays |
| CN106205479A (en) * | 2014-10-13 | 2016-12-07 | 三星显示有限公司 | OLED and the method driving OLED |
| CN108269537A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Organic light-emitting diode (OLED) display apparatus |
| CN108877685A (en) * | 2018-07-20 | 2018-11-23 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED pixel driving circuit and OLED display |
| CN109308879A (en) * | 2017-07-27 | 2019-02-05 | 乐金显示有限公司 | Organic light emitting display and the method for sensing its deterioration |
| US10211268B1 (en) * | 2012-09-28 | 2019-02-19 | Imaging Systems Technology, Inc. | Large area OLED display |
| CN109377943A (en) * | 2018-12-26 | 2019-02-22 | 合肥鑫晟光电科技有限公司 | A kind of compensation method and display device of pixel unit |
-
2019
- 2019-08-29 CN CN201910812497.XA patent/CN110473501B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9384698B2 (en) * | 2009-11-30 | 2016-07-05 | Ignis Innovation Inc. | System and methods for aging compensation in AMOLED displays |
| US10211268B1 (en) * | 2012-09-28 | 2019-02-19 | Imaging Systems Technology, Inc. | Large area OLED display |
| CN106205479A (en) * | 2014-10-13 | 2016-12-07 | 三星显示有限公司 | OLED and the method driving OLED |
| CN104575382A (en) * | 2015-01-06 | 2015-04-29 | 昆山国显光电有限公司 | Aging compensation system and method for OLED component |
| CN105139790A (en) * | 2015-10-09 | 2015-12-09 | 青岛海信电器股份有限公司 | OLED display aging detection method and display device |
| CN108269537A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Organic light-emitting diode (OLED) display apparatus |
| CN109308879A (en) * | 2017-07-27 | 2019-02-05 | 乐金显示有限公司 | Organic light emitting display and the method for sensing its deterioration |
| CN108877685A (en) * | 2018-07-20 | 2018-11-23 | 深圳市华星光电半导体显示技术有限公司 | A kind of OLED pixel driving circuit and OLED display |
| CN109377943A (en) * | 2018-12-26 | 2019-02-22 | 合肥鑫晟光电科技有限公司 | A kind of compensation method and display device of pixel unit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110992878A (en) * | 2019-11-28 | 2020-04-10 | 上海天马有机发光显示技术有限公司 | Display panel, compensation method thereof and display device |
| US11183114B2 (en) | 2019-11-28 | 2021-11-23 | Shanghai Tianma AM-OLED Co., Ltd. | Display panel, compensation method thereof and display device compensating an organic light-emitting element |
| CN111312129A (en) * | 2020-02-28 | 2020-06-19 | 京东方科技集团股份有限公司 | Pixel circuit, light-emitting device aging detection and compensation method and display substrate |
| CN111445852A (en) * | 2020-05-06 | 2020-07-24 | Oppo广东移动通信有限公司 | Pixel compensation circuit, display device and compensation method |
| CN112863428A (en) * | 2021-01-25 | 2021-05-28 | 京东方科技集团股份有限公司 | Pixel circuit, driving method, display panel and display device |
| CN113808529A (en) * | 2021-09-28 | 2021-12-17 | 深圳市华星光电半导体显示技术有限公司 | Pixel circuit and external compensation method thereof |
| CN114220397A (en) * | 2022-02-10 | 2022-03-22 | 上海天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN114220397B (en) * | 2022-02-10 | 2023-03-28 | 上海天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN115359756A (en) * | 2022-08-30 | 2022-11-18 | Tcl华星光电技术有限公司 | Detection compensation circuit and display panel |
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Effective date of registration: 20211022 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |