CN106935189A - Oganic light-emitting display device and its driving method - Google Patents
Oganic light-emitting display device and its driving method Download PDFInfo
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- CN106935189A CN106935189A CN201611272979.3A CN201611272979A CN106935189A CN 106935189 A CN106935189 A CN 106935189A CN 201611272979 A CN201611272979 A CN 201611272979A CN 106935189 A CN106935189 A CN 106935189A
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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
- G09G3/3233—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 current through the light-emitting element
-
- 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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
Abstract
The invention provides a kind of oganic light-emitting display device and its driving method, the oganic light-emitting display device includes display panel, power supply, selective driver and gamma change driver.Display panel includes sub-pixel.Power supply is configured as output for driving the driving voltage of sub-pixel.Selective driver, it is configured as producing control signal, so that selectivity driving is enabled between the first drive scheme and the second drive scheme for the driving transistor in each sub-pixel, wherein, the first drive scheme and the second drive scheme use the saturation region and linear zone of driving voltage curve respectively.Gamma changes driver, is configured as changing gamma value based on the drive scheme selected by selective driver.
Description
Technical field
The present invention relates to oganic light-emitting display device and its driving method.
Background technology
With the development of information technology, wide-scale distribution is obtained as the display device that medium is connected between user and information.
At this point, as a kind of display device, organic light emitting display (OLED) equipment is more and more applied.
Oganic light-emitting display device includes：Display panel with multiple sub-pixels；Output drive signal is set to drive
Move the driver of the display panel；And produce the power supply for being supplied to driver and display panel electric power.Driver may include
The scanner driver and the data to display panel offer data-signal of scanning signal or gating signal are provided to display panel
Driver.
Operation on oganic light-emitting display device, when the sub-pixel of display panel receives drive signal (for example, scanning
Signal and data-signal) when, selected sub-pixel sends light beam, triggers image to show.
Oganic light-emitting display device can be used for various equipment, such as TV, navigation equipment, video player, personal meter
Calculation machine PC, wearable device (for example, wrist-watch, glasses etc.), and mobile phone (for example, smart phone).However, currently available
Oganic light-emitting display device should need save its energy consumption.
The content of the invention
On the one hand, the invention provides a kind of oganic light-emitting display device, the oganic light-emitting display device includes display surface
Plate, power supply, selective driver and gamma change driver.Display panel includes sub-pixel.Power supply is configured as output to be used for
Drive the driving voltage of sub-pixel.Selective driver is configured as producing control signal, with for the drive in each sub-pixel
Dynamic transistor enables selectivity between the first drive scheme and the second drive scheme and drives, and based on being selected by selective driver
The drive scheme selected changes gamma value, wherein, the first drive scheme and the second drive scheme use driving voltage curve respectively
Saturation region and linear zone.
On the other hand, the invention provides the driving method of oganic light-emitting display device.The method includes：Produce control letter
Number, for the driving transistor in each sub-pixel, selectivity drive is enabled between the first drive scheme and the second drive scheme
It is dynamic, wherein, the first drive scheme and the second drive scheme to driving transistor respectively using driving voltage curve saturation region and
Linear zone；Gamma variable signal is produced, gamma value is changed with the drive scheme based on selection；And the driving side based on selection
Case changes the level of the high level voltage for being supplied to sub-pixel.
Brief description of the drawings
Comprising accompanying drawing be used to providing it is of the invention further understand, it is included in specific embodiment of the invention simultaneously
A part for specific embodiment of the invention is constituted, and comes together to explain principle of the invention with specification.
Fig. 1 is the theory diagram of the oganic light-emitting display device according to first embodiment of the invention.
Fig. 2 schematically illustrates Fig. 1 sub-pixel structure figures.
Fig. 3 represents the circuit structure of prior art sub-pixel.
Fig. 4 is the current -voltage curve of the driving transistor of driving method in the prior art based on prior art sub-pixel
Figure.
Fig. 5 represents the circuit structure of the sub-pixel according to first embodiment of the invention.
Fig. 6 is the current -voltage curve of the driving transistor according to first embodiment of the invention.
Fig. 7 is the gamma electric voltage-gray level for describing gray level expressional scheme according to first embodiment of the invention
Curve map.
Fig. 8 is the brightness-grey scale curve figure of the gray level expressional scheme based on Fig. 7.
Fig. 9 is the self adaptation gamma curve figure reached for grey scale table according to first embodiment of the invention.
Example arrangements of the Figure 10 exemplified with the equipment according to first embodiment of the invention.
Figure 11 represents the driving method for describing the oganic light-emitting display device according to first embodiment of the invention
Drive transistor current-voltage curve.
Figure 12 shows the frame of the component interested of the oganic light-emitting display device according to first embodiment of the invention
Figure.
Figure 13 shows the modular construction of first embodiment of the invention.
Figure 14 shows modular construction according to the second embodiment of the present invention.
Theory diagrams of the Figure 15 exemplified with oganic light-emitting display device second embodiment of the invention.
Figure 16 schematically illustrates the structure of the sub-pixel of Figure 15.
Circuit structures of the Figure 17 exemplified with sub-pixel second embodiment of the invention.
Figure 18 is the current -voltage curve figure of the driving transistor according to second embodiment of the invention.
Figure 19 is the drive for describing the driving method of the oganic light-emitting display device according to second embodiment of the invention
Voltage-gray level curve the figure of dynamic transistor.
Figure 20 describes the problem of driving transistor degeneration.
Figure 21 shows the driving for describing high level voltage change programme second embodiment of the invention
The current -voltage curve figure of transistor.
Figure 22 shows modular construction according to the third embodiment of the invention.
Figure 23 shows modular construction according to the fourth embodiment of the invention.
Specific embodiment
With reference now to accompanying drawing referring in detail to the embodiment of the present application implementation method.
Hereinafter, specific embodiment of the invention will be described in detail with reference to the attached drawings.
According to light emission direction, oganic light-emitting display device can be divided into top emitting, bottom emitting and double emission types.
According to the channel type of its internal transistor, oganic light-emitting display device can be divided into reverse superimposed type, superimposed type or
Coplanar type, wherein, reverse superimposed type may include that rear channel etch BCE types or etching stop ES types.
According to the semi-conducting material of transistor, oganic light-emitting display device can be divided into oxide, low temperature polycrystalline silicon LTPS, non-
Crystal silicon a-Si and polysilicon p-Si types.
Oganic light-emitting display device can be used for TV, navigation equipment, video player, personal computer PC, wearable
Equipment (such as wrist-watch, glasses etc.) and mobile phone (such as smart mobile phone).
<First embodiment>
Fig. 1 is the theory diagram of the oganic light-emitting display device according to first embodiment of the invention.Fig. 2 schematically examples
The structure of Fig. 1 sub-pixels is shown.
As shown in figure 1, oganic light-emitting display device can include host computer system 1000, timing controller 170, data-driven
Device 130, power supply 140, gate driver 150 and display panel 110.
Host computer system 1000 can include being internally provided with the SoC (system on a chip) of scaler, and will can be input into
The digital of digital video data of video is converted into having the data-signal for being adapted to form, then defeated for being shown by display panel 110
Go out the data-signal by changing.Multiple timing signals can be supplied to timing control by host computer system 1000 together with data-signal
Device processed 170.
The timing signal of Intrusion Detection based on host system 1000, for example, enable signal, master based on vertically and horizontally synchronizing signal, data
Clock signal etc., timing controller 170 can be configured as the operation timing of control data driver 130 and gate driver 150.
Timing controller 170 can be configured as performing Video processing, compensation data for the data-signal from host computer system 1000
Deng, then will through process and compensate data-signal be supplied to data driver 130.
Data driver 130 can be configured as being carried out based on data controlling signal DDC from timing controller 170 etc.
Operation.Data driver 130 can be configured as the data-signal DATA conversions of the digital form of self-timing in future controller 170
Into the data-signal of analog form, converted signal is then exported.
On this point, based on the gamma electric voltage from gamma module inside or outside data driver 130, data-driven
Device 130 can be configured as being converted into the data-signal DATA of digital form the data-signal of analog form.Data driver
The 130 data wire DL1 to DLn that data-signal is supplied to display panel 110.
Gate driver 150 can be configured as being grasped based on the gate control signal GDC from timing controller 170
Make.Gate driver 150 can be configured as the gating signal or scanning signal of output gating high voltage or gating low-voltage.
Gate driver 150 can be configured as sequentially exporting the gating signal of forward or inverse.Gate driver
The 150 select lines GL1 to GLm that can be configured as being supplied to gating signal display panel 110.
Power supply 140 can be configured as output for driving high level voltage (drain voltage) EVDD of display panel 110
With low level voltage (source voltage) EVSS, and for the collector voltage VCC and ground voltage of driving data driver 130
GND etc..In addition, power supply 140 can be configured as the voltage needed for producing display device operation, for example, it is sent to gate driver
150 gating high voltage or gating low-voltage.
Display panel 110 may include sub-pixel SP, be connected respectively to sub-pixel SP data wire DL1 to DLn, connect respectively
To the select lines GL1 to GLm of sub-pixel SP.Based on the gating signal from gate driver 150 and from data driver 130
Data-signal DATA, display panel 110 can be configured as display image.Display panel 110 may include upper substrate and lower base
Plate.Sub-pixel SP may be arranged between upper substrate and infrabasal plate.
As shown in Fig. 2 single sub-pixel includes being connected to select lines GL1 and data wire DL1 (or positioned between them
On crosspoint) switching thin-film transistor SW and be configured as based on by switching thin-film transistor SW provide data-signal
The image element circuit PC of DATA operations.Image element circuit PC may include driving transistor, storage, Organic Light Emitting Diode and picture
Plain compensation circuit.Pixel compensation circuit can be configured to compensate for driving transistor, storage and Organic Light Emitting Diode
At least one of.
Pixel compensation circuit can be configured to compensate for the characteristic of driving transistor (for example, threshold voltage, current transfer rate
Deng) and/or Organic Light Emitting Diode characteristic (for example, threshold voltage) and/or its degeneration.Pixel compensation circuit can work independently
Or worked together with external circuit.Pixel compensation circuit may include at least one thin film transistor (TFT) and electric capacity.Pixel compensation electricity
Road can have different structures according to compensation method.Therefore, further describing for its structure will be omitted.
Circuit structures of the Fig. 3 exemplified with prior art sub-pixel.Fig. 4 is drive in the prior art based on prior art sub-pixel
The current -voltage curve of dynamic method.
As shown in Figure 3 and Figure 4, in prior art driving method, driving transistor DTFT is driven in the saturation region of curve
Move to operate sub-pixel.Therefore, high level driving voltage (that is, high level Vds and EVDD) should be included.
So, because prior art oganic light-emitting display device drives crystal in the saturation region of current -voltage curve
Pipe DTFT, should use high level voltage EVDD, result in unnecessary power consumption.
Circuit structures of the Fig. 5 exemplified with sub-pixel according to the first embodiment of the invention.Fig. 6 is of the invention
Drive transistor current-the voltage curve of first embodiment.Fig. 7 is for describing according to first embodiment of the invention
The gamma electric voltage of gray level expressional scheme-gray level curve figure.Fig. 8 is the brightness-gray scale of the gray level expressional scheme based on Fig. 7
Curve map.Fig. 9 is the self adaptation gamma curve figure reached for grey scale table according to first embodiment of the invention.Figure 10 is illustrated
The example arrangement of the equipment according to first embodiment of the invention.Figure 11 shows real according to the present invention first for describing
Apply the current -voltage curve figure of the driving transistor of the driving method of the oganic light-emitting display device of mode.
As shown in Figure 5 and Figure 6, according to first embodiment of the invention, in order that the power consumption of oganic light-emitting display device
Reduce, the driving transistor DTFT in sub-pixel can be used the combination of the zone of saturation and the range of linearity of current -voltage curve
Drive.
Further, in order that the lower power consumption of oganic light-emitting display device, the level of high level voltage EVDD is convertible into
The level lower than the level for forming the data voltage VDATA of data-signal.
For example, an implementation method of the invention, when driving transistor is produced for driving Organic Light Emitting Diode
Electric current I_oled when, can be with as the level of the high level voltage EVDD for producing mono- parameter of target current I_target
P1 level is reduced to from P2 level.
When linear zones of the driving transistor DTFT in sub-pixel using curve, the level of high level voltage EVDD is compared
Can be lowered in the method for prior art.So, the stress level that transistor bears can be subtracted compared to the method for prior art
It is small.As a result, the art methods for being driven using saturation region compared to driving transistor, the degeneration of transistor is it can be desirable to prolonged
Time cycle longer late.
Fig. 5 is by example exemplified with usually used 2T1C structures, two of which transistor SW and DTFT and electric capacity
Device Cst is used to drive Organic Light Emitting Diode (OLED).However, the present invention is not restricted to this.On the contrary, the present invention can be used to having
There is the oganic light-emitting display device of the sub-pixel comprising another different pixels circuit structure.
As shown in FIG. 7 and 8, the driving method according to first embodiment of the invention can be used linear gamma Linear GMA
To represent the gray level of low and middle scope, and high grade grey level scope is represented using non-linear gamma (for example, 2.2GMA).This is
Because when gray level is represented using real pixel, using the zone of saturation for representing low and middle scope gray level, and using expression
The range of linearity of high grade grey level scope drives driving transistor.
At this point, according to first embodiment of the invention driving method can be used self adaptation gamma curve algorithm, its
Algorithm including determining gamma change point (GCP).Using self adaptation gamma curve algorithm, mode can be obtained with self adaptation and changed
GCP。
When gamma value is changed using self adaptation gamma curve algorithm, when the transistor is driven using range of linearity driving
Data voltage can be improved without independent device.When using self adaptation gamma curve when, grey scale curve can low gray level, in
Change between gray level and high grade grey level scope.
As shown in figure 9, gamma change point (GCP) can be determined based on data voltage level.Although data voltage level is represented
Identical gray level, but data voltage level can be with difference.That is, for example, because based on using peak brightness control
(PLC) the average picture level (APL) of algorithm, the peak value alterable of data voltage level.
Therefore, although data voltage level represents identical gray level, data voltage level can be with different from each other, can
Gamma change point (GCP) is determined based on peak brightness control (PLC) and/or average picture level (APL) benchmark.As a result, gal
Horse change point (GCP) can be offset downward to the range of linearity based on data voltage level or offset up nonlinear area.
As shown in Figure 9 and Figure 10, gamma change point (GCP) can be based on the characteristic variations of data voltage level.Therefore, in order to
The changing features of response data voltage level, current OLED device is configured such that can be based on timing controller 170
(T-con) the gamma variable signal GMAC for sending controls the gamma change point (GCP) of gamma module 135 (GMAIC).
At this point, comprising the module or algorithm for changing driving transistor drive scheme in timing controller 170.So
And, the present invention is not restricted to this.Module or algorithm for changing driving transistor drive scheme are formed as independent circuits mould
Block.In this case, gamma variable signal GMAC can be sent by independent circuits module.
As shown in figure 11, according to the driving method of the oganic light-emitting display device of first embodiment of the invention, it is
Avoid driving the deteriroation of image quality caused by driving transistor using linear zone, be desired to have this deteriroation of image quality
View data can experience different drive schemes.
For example, when have input undesirable view data with this deteriroation of image quality, performing such as (a) institute of Figure 11
The drive scheme for showing.That is, driving transistor is driven using linear zone, and the level deviation of high level voltage EVDD arrives more electric than data
The level for pressing the level of VDATA low.
Conversely, when have input the view data for being desired to have this deteriroation of image quality, performing as shown in (b) of Figure 11
Drive scheme.That is, using saturation region drive driving transistor, and high level voltage EVDD level deviation to than data voltage
The level of VDATA level high.
At this point, as first embodiment, in order to be based on whether this image matter to specific view data
The drive scheme for degenerating and switching driving transistor is measured, this OLED device is settable as follows：
Figure 12 shows the block component diagram interested of the oganic light-emitting display device according to first embodiment of the invention.
Figure 13 shows modular construction according to a first embodiment of the present invention.Figure 14 shows mould according to a second embodiment of the present invention
Blocking structure.
As shown in figure 12, oganic light-emitting display device according to a first embodiment of the present invention may include selective driver
160th, power supply 140 and compensating module 180.Selective driver 160 and compensating module 180 can be integrated into individual module, for example,
It is integrated into timing controller.
Selective driver 160 can be configured as to the driving transistor in sub-pixel in the first drive scheme and second
Selectivity is enabled between drive scheme to drive.In the first drive scheme, using saturation region (EVDD ＞ VDATA) aobvious to drive
Show the driving transistor of sub-pixel in panel.In the second drive scheme, using linear zone (EVDD ＜ VDATA) aobvious to drive
Show the driving transistor of sub-pixel in panel.Driven to enable such selectivity, selective driver 160 may include non-thread
Property (or normally) driver 161, Linear actuator 163 and gamma change driver 165.
Non-linear or driven device 161 can be configured as producing the first driving control signal, to indicate execution the
One drive scheme.That is, using the first driving control signal, sub- picture in display panel is driven using saturation region or inelastic region
The driving transistor of element.At this point, when non-linear driver 161 exports the first driving control signal to power supply 140, power supply
Can be configured as being displaced to level than data voltage VDATA level higher from high level voltage EVDD.
Linear actuator 163 can be configured as producing the second driving control signal to indicate to perform the second drive scheme.
That is, using the second driving control signal, drive the driving of sub-pixel in display panel brilliant using linear zone or non-saturated region
Body pipe.At this point, when non-linear driver 161 exports the second driving control signal to power supply 140, power supply can be configured
It is to be displaced to the lower level of level than data voltage VDATA from high level voltage EVDD.
When have input the view data with desired deteriroation of image quality, Linear actuator 163 can utilize saturation region
To force to drive the driving transistor in the sub-pixel in display panel.In other words, when have input with desired picture quality
It is linear to drive although drive scheme linear driver 163 is arranged to the second drive scheme during the view data of degeneration
Dynamic device 163 can be forced not performing the second drive scheme, but perform and use the first drive scheme of saturation region.
Therefore, Linear actuator 163 can be configured as base search table, look-up table includes estimating as deteriroation of image quality
The parameter of required factor.Look-up table can be stored as data in memory.Alternatively, linear transducer 163 can be by
It is configured to using image analysis algorithm come prognostic chart picture quality degradation.
Factor needed for deteriroation of image quality is estimated can include but is not limited to average picture level (APL), You Jifa
Total current (total EL electric currents), the peak value of gray level, image complexity, driving frequency, crosstalk pattern of flowing etc. in optical diode.
These factors can experimentally be provided as parameter threshold.
Linear actuator 163 can be configured as the parameter threshold in the parameter value and look-up table for compare current image date
Value, and parameter threshold is less than based on the value of consult volume for determining current image date, enable driving transistor and driven using saturation region.
For example, when expectation generation deteriroation of image quality is determined, Linear actuator 163 can be with non-linear driver 161
Cooperation so that the second driving control signal from linear transducer 163 does not change to logic low, but from non-linear or
First driving control signal of driven device 161 changes to logically high.
Feature based parameter and according to the predetermined condition of this OLED device, gamma change driver 165 can be configured as
Gamma value is set.Change based on drive scheme, gamma change driver 165 can be configured as exporting gamma model
The gamma variable signal of middle instruction gamma change point.Gamma change driver 165 can be configured as based on such as peak brightness
Characteristic parameter as (PLC) and/or average picture level (APL) benchmark is controlled to export gamma variable signal.
Compensating module 180 can be configured as analyzing the data-signal for being input to display panel, and compensate due to making respectively
Display panel caused by being driven with the selectivity between saturation region and first drive scheme and the second drive scheme of linear zone
Characteristic variations.Further, compensating module 180 can be configured to compensate for the display surface caused by the change of gamma change point
Plate characteristic variations.
Further, compensating module 180 can be configured as calculating display panel characteristic variations (for example, by using linear
IR declines caused by the driving in area), then compensate for the change.Therefore, changing the gamma variable signal of driver 165 based on gamma
With the analysis of data-signal, compensating module 180 can be configured as producing and exporting for compensating display panel characteristic variations
Thermal compensation signal.
According to the first embodiment of the invention, the power consumption of this OLED device can be saved, and simultaneously, by based on image matter
The selective drive scheme that amount degeneration is estimated, can further postpone the degeneration of driving transistor.Therefore, provide a kind of driving having
The method of machine light-emitting display apparatus, the method includes：To the driving transistor in sub-pixel, control signal is produced to be driven with first
The dynamic selectivity that enabled between scheme and the second drive scheme drives, wherein, first scheme and alternative plan are to driving transistor point
Not Li Yong driving voltage curve saturation region and linear zone；Gamma variable signal is produced to change based on selected drive scheme
Become gamma value；Change the level of the high level voltage for being supplied to sub-pixel based on selected drive scheme.
Hereinafter, the first modular construction of oganic light-emitting display device will be described by way of example, wherein, choosing
Selecting property driver 160 and compensating module 180 are merged into timing controller 170.
As shown in figure 13, the first modular construction of organic light-emitting display device is represented, oganic light-emitting display device can be with
Be modular is first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 can have main frame
System 1000 and the power supply 140 being disposed thereon.Second circuit board BD2 can have timing controller 170, gamma module 135
With the voltage conversion circuit ST being disposed thereon.Voltage conversion circuit ST may be provided at the internal or external of power supply 140.
As shown in figure 14, the second modular construction of organic light-emitting display device, oganic light-emitting display device module are represented
Turn to first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 has host computer system 1000, electricity
Source 140 and the voltage conversion circuit ST being disposed thereon.Second circuit board BD2 has timing controller 170 and is disposed thereon
Gamma module 135.Voltage conversion circuit ST may be provided at the internal or external of power supply 140.
Timing controller 170 can be configured as output switch control signal STC, with from being arranged on first circuit board BD1
On power supply 140 enable selectively power between the first high level voltage EVDD1 and the second high level voltage EVDD2.One
In individual embodiment, the first high level voltage EVDD1 (saturation region driving voltage) can be (linear higher than the second high level voltage EVDD2
Area's driving voltage).
Timing controller 170 can be configured as, when the first driving control signal is by being arranged in timing controller 170
While non-linear driver is produced, first switch control signal is produced, wherein, the first driving control signal uses saturation
Driving of the area (that is, inelastic region) to driving transistor.
Further, timing controller 170 can be configured as exporting gamma variable signal when needing gamma to change
GMAC.For example, gamma module 135 can be configured as being provided and the to data driver 130 based on gamma variable signal GMAC
The gamma electric voltage GMA1 that one gamma curve meets.
When timing controller 170 has outputed the first driving control signal and first switch control signal, voltage turns
Changing circuit ST can be configured for operation so that the first high level voltage EVDD1 from power supply 140 is provided to display
Panel 110.So, display panel 110 can be based on saturation region condition of work be operated.
Timing controller 170 can be configured as, and be produced in the Linear actuator for being arranged on the inside of timing controller 170
While second driving control signal, second switch control signal is produced, wherein, the second driving control signal is enabled using linear
Driving of the area (that is, the region of change) to driving transistor.
Further, when needing gamma to change, timing controller 170 can be configured as exporting gamma variable signal
GMAC.For example, being based on gamma variable signal GMAC, gamma module 135 can be configured as being provided and the to data driver 130
The gamma electric voltage GMA2 that two grey scale curves are consistent.
When timing controller 170 has exported the second driving control signal and second switch control signal, voltage conversion
Circuit ST can be configured for operation so that the second high level voltage EVDD2 from power supply 140 is supplied into display surface
Plate 110.So, display panel 110 can be based on linear zone condition of work be operated.
As described above, according to the present invention, in order to change the level of high level voltage, voltage conversion circuit ST is from host computer system
100 receive two EVDD, and the result of calculation (parameter result of calculation) based on timing controller 170 selects two EVDD wherein
One (this is directed to Figure 13).Selectable, voltage conversion circuit ST is received by the result of calculation of timing controller 170 as anti-
Feedback, and selected two one of them (this is directed to Figure 14) of EVDD based on the feedback.However, both modes can be only example
Property.Further alternative, both power supply 140 and timing controller 170 all may be provided on second circuit board DB2.The present invention
It is not limited to said structure.
<Second embodiment>
Figure 15 is the theory diagram of organic light-emitting display device second embodiment of the invention, and Figure 16 is schematic
The structure of the sub-pixel of earth's surface diagram 15.
As shown in figure 15, oganic light-emitting display device can include that host computer system 1000, timing controller 170, data drive
Dynamic device 130, power supply 140, gate driver 150 and display panel 110.
Host computer system 1000 may include to be internally provided with the SoC (on-chip system) of scaler (scaler), and will can be input into
The digital of digital video data of video is converted into the data-signal of appropriate format, is shown with by display panel 110, and then output is through turning
The data-signal for changing.Multiple timing signals can be supplied to timing controller 170 by host computer system 1000 together with data-signal.
The timing signal of Intrusion Detection based on host system 1000, for example, enable signal, master based on vertically and horizontally synchronizing signal, data
Clock signal etc., timing controller 170 can be configured as control data driver 130 and the work of gate driver 150 is determined
When.Timing controller 170 can be configured as performing Video processing, data benefit for the data-signal from host computer system 1000
Repay, the data-signal through processing and compensate then is supplied to data driver 130.
Data driver 130 can be configured as based on works such as the data controlling signal DDC from timing controller 170
Make.The data-signal DATA that data driver 130 may be configured as the digital form of self-timing in future controller 170 is converted into simulation
The data-signal of form, then exports converted signal.
On this point, based on the gamma electric voltage from gamma module inside or outside data driver 130, data-driven
Device 130 can be configured as being converted into the data-signal DATA of digital form the data-signal of analog form.Data driver
The 130 data wire DL1 to DLn that data-signal is supplied to display panel 110.
Gate driver 150 can be configured as being grasped based on the gate control signal GDC from timing controller 170
Make.Gate driver 150 can be configured as the gating signal or scanning signal of output gating high voltage or gating low-voltage.
Gate driver 150 can be configured as sequentially exporting the gating signal of forward or inverse.Gate driver
The 150 select lines GL1 to GLm that can be configured as being supplied to gating signal display panel 110.
Power supply 140 can be configured as output for driving high level voltage (drain voltage) EVDD of display panel 110
With low level voltage (source voltage) EVSS, and for the collector voltage VCC and ground voltage of driving data driver 130
GND etc..In addition, power supply 140 can be configured as the voltage needed for producing display device operation, for example, it is sent to gate driver
150 gating high voltage or gating low-voltage.
Display panel 110 may include sub-pixel SP, be connected respectively to sub-pixel SP data wire DL1 to DLn, connect respectively
To the select lines GL1 to GLm of sub-pixel SP.Based on the gating signal from gate driver 150 and from data driver 130
Data-signal DATA, display panel 110 can be configured as display image.Display panel 110 may include upper substrate and lower base
Plate.Sub-pixel SP may be arranged between upper substrate and infrabasal plate.
As shown in figure 16, single sub-pixel includes being connected to select lines GL1 and data wire DL1 (or positioned between them
Crosspoint on) switching thin-film transistor SW and be configured as based on by switching thin-film transistor SW provide data believe
The image element circuit PC of number DATA operation.Image element circuit PC may include driving transistor, storage, Organic Light Emitting Diode and
Pixel compensation circuit.Pixel compensation circuit can be configured to compensate for driving transistor, storage and organic light-emitting diodes
At least one of pipe.
Pixel compensation circuit can be configured to compensate for the characteristic of driving transistor (for example, threshold voltage, current transfer rate
Deng) and/or Organic Light Emitting Diode characteristic (for example, threshold voltage) and/or its degeneration.Pixel compensation circuit can work independently
Or worked together with external circuit.Pixel compensation circuit may include at least one thin film transistor (TFT) and electric capacity.Pixel compensation electricity
Road can have different structures according to compensation method.Therefore, further describing for its structure will be omitted.
Exemplified with the circuit structure of sub-pixel second embodiment of the invention, Figure 18 is according to the present invention to Figure 17
Drive transistor current-the voltage curve of second embodiment, Figure 19 is for describing the second embodiment party of the invention
The voltage of the driving transistor of the driving method of the oganic light-emitting display device of formula-gray level curve figure, Figure 20 describes to drive
The degenerate problem of transistor, and Figure 21 shows that the high level voltage for description second embodiment of the invention becomes
The current -voltage curve of the driving transistor of change scheme.
As shown in Figure 17 and Figure 18, according to second embodiment of the invention, in order to realize the work(of oganic light-emitting display device
Consumption is reduced, and the driving transistor DTFT in sub-pixel can be used the combination of the zone of saturation and the range of linearity of current -voltage curve
To drive.
Further, in order that the lower power consumption of oganic light-emitting display device, the level of high level voltage EVDD is convertible into
The level lower than the level for forming the data voltage VDATA of data-signal.
For example, second embodiment of the invention, when driving transistor is produced for driving Organic Light Emitting Diode
Electric current I_oled when, can be with as the level of the high level voltage EVDD for producing mono- parameter of target current I_target
P1 level is reduced to from P2 level.
When linear zones of the driving transistor DTFT in sub-pixel using curve, the level of high level voltage EVDD is compared
Can be lowered in the method for prior art.So, the stress level that transistor bears can be subtracted compared to the method for prior art
It is small.As a result, the art methods for being driven using saturation region compared to driving transistor, the degeneration of transistor is it can be desirable to prolonged
Time cycle longer late.
Figure 17 is by example exemplified with usually used 2T1C structures, two of which transistor SW and DTFT and electric capacity
Device Cst is used to drive Organic Light Emitting Diode (OLED).However, the present invention is not restricted to this.On the contrary, the present invention can be used to having
There is the oganic light-emitting display device of the sub-pixel comprising another different pixels circuit structure.
Such as first embodiment of the invention, driving method second embodiment of the invention can be used linearly
Gamma Linear GMA represent the gray level of low and middle scope, and represent high using non-linear gamma (for example, 2.2GMA)
Grey level range.Because when gray level is represented using real pixel, using the saturation for representing low and middle scope gray level
Region, and drive driving transistor using the range of linearity for representing high grade grey level scope.
As shown in figure 19, in the driving method of oganic light-emitting display device second embodiment of the invention,
In order to avoid driving the deteriroation of image quality caused by driving transistor using linear zone, it is desired to have this picture quality and moves back
The view data of change can experience different drive schemes.
For example, when have input undesirable view data with this deteriroation of image quality, performing such as (a) institute of Figure 19
The drive scheme for showing.That is, driving transistor is driven using linear zone, and the level conversion of high level voltage EVDD is than data electricity
The level for pressing the level of VDATA low.
Conversely, when have input the view data for being desired to have this deteriroation of image quality, performing as shown in (b) of Figure 19
Drive scheme.That is, driving transistor is driven using saturation region, and the level conversion of high level voltage EVDD is to compare data voltage
The level of VDATA level high.
However, from (a) of Figure 19 as can be seen that when driving transistor is driven using linear zone, it is necessary to improve data
Voltage VDATA is meeting target current I_target.So, data voltage is improved to meet target current I_target
The example of the timing of VDATA can be explained as follows：
As shown in figure 20, when the driving time of driving transistor DTFT is continuous, or driving transistor DTFT positive voltage
During continuous applying, due to deteriroation of image quality, threshold voltage vt h is offseting forward.In this case, driving transistor
The Vgs (or Vgs-Vth) of DTFT is gradually reduced, therefore data voltage VDATA further should improve to meet target current
I_target。
Therefore, when due to deteriroation of image quality, during the threshold voltage forward migration of driving transistor DTFT, data voltage
VDATA should be improved further, but now, due to the limited output area of data driver, it may appear that constraint.Namely
Say, it is difficult to solve such problem, i.e. for example such situation, due to limited output area, data driver cannot
Improve data voltage VDATA and exceed constant range.
In addition, if continuously cause this deteriroation of image quality problem, then the degeneration deviation of threshold voltage be based on position or
The sub-pixel of person's display panel and disperse, cause the life-span of increased screen stain and display panel on display panel to reduce.
According to experimental result, when using linear zone to drive driving transistor, it is more serious that the problem is likely to occur, therefore, according to
Second embodiment of the present invention, can be according to improvement of such as getting off：
As shown in figure 21, when have input undesirable view data with this deteriroation of image quality, linear zone is used
Level to drive driving transistor, high level voltage EVDD can be exchanged into the level lower than data voltage VDATA.Meanwhile, root
According to the degenerative character of driving transistor, can be by avoiding improving data voltage VDATA and gradually increasing high level voltage EVDD
Level, keep target current I_target.
That is, second embodiment of the invention, driving transistor is driven using linear zone, crystal is driven
The degenerative character (for example, threshold voltage) of pipe is monitored or senses.Further, when the degenerative character (example of driving transistor
Such as, threshold voltage) when deviateing reference range (for example, the reference threshold voltage) set in timing controller 170, it is to avoid data
The increase of voltage VDATA, and the level of high level voltage EVDD gradually increases.
In order to the comparing for promoting the understanding of specification, first embodiment and second embodiment can be described as follows：
In the first embodiment, in order to drive driving transistor using linear zone and produce target current I_target,
The level of high level voltage EVDD is reduced to P1 level from P2 level, and data voltage VDATA increases to Vd3.
In this second embodiment, in order to drive driving transistor using linear zone and produce target current I_
The level of target, high level voltage EVDD is reduced to P1 level from P2 level, and data voltage VDATA keeps current level, example
Such as Vd1, or slightly increase to Vd2.Further, in this second embodiment, driving transistor degenerative character (for example,
Threshold voltage) it is monitored or sense, and the degenerative character (for example, threshold voltage) in response to driving transistor change, electricity high
Level PV1, PV2, PV3 of ordinary telegram pressure EVDD gradually increases.
For example, level PV1, PV2, PV3 of high level voltage EVDD P2 directions and threshold voltage change proportionally
Gradually increase.So, in this second embodiment, it is contemplated that the degenerative character and compensation allowance of driving transistor, high level electricity
Level PV1, PV2, PV3 of EVDD is pressed also to offset.Simultaneously as whole sub-pixels are provided with the high level electricity for gradually offseting jointly
Pressure EVDD, so it could not be expected that global compensation effect.
It is as explained above, when driving transistor DTFT threshold voltage forward migration exceed steady state value (for example,
By the reference threshold voltage of Setup Experiments) when, only by improving data voltage VDATA, hardly result in and meet target current I_
The allowance of target.However, second embodiment of the invention, as level PV1, PV2, PV3 of high level voltage EVDD
When being offset in response to the change of the threshold voltage of driving transistor, it is able to carry out from data voltage VDATA due to only additional
Compensation, so obtaining the allowance that disclosure satisfy that target current I_target.
Therefore, second embodiment of the invention, compared with first embodiment, due to improve data voltage
The allowance that VDATA can offset, it can be ensured that compensation range is (for example, compensate necessary output to data voltage
Scope) in bigger width.
At this point, in this second embodiment, in order to be based on whether this picture quality occurs to special image data
Degenerate to switch the drive scheme of driving transistor, and the gradually level of switching high level voltage EVDD, this OLED device can set
Put as follows：
Figure 22 shows the modular construction of the 3rd implementation method of the invention.Figure 23 shows of the invention
The modular construction of the 4th implementation method.
As shown in figure 22, the 3rd modular construction of oganic light-emitting display device is represented, oganic light-emitting display device can mould
Block turns to first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 can have be arranged on
Host computer system 1000 and power supply 140.Second circuit board BD2 can have the timing controller 170, gamma module being arranged on
135 and voltage conversion circuit ST.Voltage conversion circuit ST may be provided at the internal or external of power supply 140.Gamma module 135 is also held
Row and those example identical functions or operation for being shown in first embodiment or second embodiment.However, due to
This is not the principal character of second embodiment, and its explanation is by with reference to first embodiment of the invention or second embodiment
Discuss part.
As shown in figure 23, the 4th modular construction of organic light-emitting display device is represented, oganic light-emitting display device can mould
Block turns to first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 can have be arranged on
Host computer system 1000, power supply 140 and voltage conversion circuit ST.Second circuit board BD2 can have the timing control being arranged on
Device processed 170 and gamma module 135.Voltage conversion circuit ST may be provided at the internal or external of power supply 140.However, due to this not
It is the principal character of second embodiment, its explanation is by with reference to the part of first embodiment of the invention or second embodiment
Discuss.
Timing controller 170 can be configured as output switch control signal STC, with from being arranged on first circuit board BD1
On power supply 140 enable selectively power between the first high level voltage EVDD1 and the second high level voltage EVDD2.One
In individual embodiment, the first high level voltage EVDD1 (saturation region driving voltage) can be (linear higher than the second high level voltage EVDD2
Driving voltage).
Timing controller 170 can be configured as, when the first driving control signal is by being arranged in timing controller 170
While non-linear driver is produced, first switch control signal is produced, wherein, the first driving control signal uses saturation
Driving of the area (that is, inelastic region) to driving transistor.
When timing controller 170 has outputed the first driving control signal and first switch control signal, voltage turns
Changing circuit ST can be configured as work so that the first high level voltage EVDD1 from power supply 140 is supplied into display panel
110.So, display panel 110 can be based on saturation region condition of work be operated.
Timing controller 170 can be configured as, and Linear actuator in by being arranged on timing controller 170 produces the
While two driving control signal, second switch control signal is produced, wherein, the second driving control signal utilizes linear zone (i.e.,
The region of change) enable the driving of driving transistor.
Further, timing controller 170 continuously monitors or senses the degenerative character (such as Vth) of driving transistor,
And degenerative character (such as Vth) based on driving transistor produces power source change signal EVC, to gradually step up high level voltage
Level.Now, when the degenerative character (such as Vth) of driving transistor is from the reference range being arranged in timing controller 170
When (reference threshold voltage) deviates, timing controller 170 performs compensating operation, to avoid the increase of data voltage VDATA, and by
The cumulative level for increasing level voltage EVDD.
When timing controller 170 has exported the second driving control signal and second switch control signal, voltage conversion
Circuit ST can be configured as work so that the second high level voltage EVDD2 from power supply 140 is supplied into display panel
110.So, display panel 110 can be based on the condition of work of linear zone come work.When timing controller 170 has been outputed
During power source change signal EVC, based on the compensating operation of timing controller 170, power supply 140 changes the second high level voltage EVDD2
Level and export the level.
By using optionally being driven to the driving transistor in sub-pixel between saturation region and linear zone and
Caused high level voltage changes, and the present invention can reduce power consumption.Further, the present invention can consider whether due to using in saturation
Selective driving is carried out to the driving transistor in sub-pixel between area and linear zone and deteriroation of image quality occurs.This can press down
The deteriroation of image quality that system may can be produced in addition because drive scheme changes.Further, by optionally by
The driving transistor in sub-pixel is driven between saturation region and linear zone, the present invention can further postpone driving transistor
Degenerate.In addition, when driving transistor is driven using linear zone, by the change in response to drive transistor threshold voltage gradually
Change high level voltage, the present invention can improve the life-span of product.
This application claims korean patent application filed in 30 days December in 2015 the 10-2015-0190436th and 2016
The priority of No. 10-2016-0125627 filed on September 29, herein to all purposes quote this application all in
Hold as reference, as illustrating completely herein.
Claims (17)
1. a kind of oganic light-emitting display device, the oganic light-emitting display device includes：
Display panel, the display panel includes sub-pixel；
Power supply, the power supply is configured as output for driving the driving voltage of the sub-pixel；
Selective driver, the selective driver is configured as producing drive signal, with for the drive in each sub-pixel
Dynamic transistor enables selectivity driving between the first drive scheme and the second drive scheme, and based on by the selectivity driving
The drive scheme of device selection changes gamma value, wherein, first drive scheme and second drive scheme use respectively
The saturation region and linear zone of the driving voltage curve.
2. oganic light-emitting display device according to claim 1, wherein, the selective driver is configured as：
The first control signal is produced when the display panel represents low grey level range and middle grey level range, with for institute
State driving transistor and enable first drive scheme；And
The second control signal is produced when the display panel represents high grade grey level scope, is made with for the driving transistor
Can second drive scheme.
3. oganic light-emitting display device according to claim 1, wherein, the selective driver is configured as：It is based on
The analysis result of the view data of the display panel is input to, in first drive scheme and second drive scheme
Between enable selectivity drive.
4. oganic light-emitting display device according to claim 1, wherein, the selective driver is configured as：When will
When being input to the view data of the display panel there is the parameter value smaller than predetermined threshold, by the drive scheme from described the
Two drive schemes change into first drive scheme.
5. oganic light-emitting display device according to claim 1, wherein, the selective driver includes：
Non-linear driver, the non-linear driver is configured as producing the first control signal, to enable using described first
Drive scheme drives the driving transistor in the sub-pixel；
Linear actuator, the Linear actuator is configured as producing the second control signal, is driven using described second with enabling
Scheme drives the driving transistor in the sub-pixel；And
Gamma changes driver, and the gamma change driver is configured as being based on as described in the selective driver selection
Drive scheme changes gamma value.
6. oganic light-emitting display device according to claim 5, wherein, the selective driver also includes compensation mould
Block, the compensating module is configured as to due to the choosing between first drive scheme and second drive scheme
The display panel characteristic variations are compensated caused by selecting property drives.
7. oganic light-emitting display device according to claim 1, wherein, the power supply is configured as：
When the driving transistor in driving the sub-pixel using the saturation region, first is supplied to the display panel
High level voltage；And
When the driving transistor in driving the sub-pixel using the linear zone, second is provided to the display panel
High level voltage, wherein, second high level voltage is lower than first high level voltage.
8. oganic light-emitting display device according to claim 7, wherein, the power supply includes on-off circuit, the switch
Circuit is configured to selectively enable and provides first high level voltage and second high level to the display panel
Voltage.
9. oganic light-emitting display device according to claim 7, wherein, the first high level voltage ratio is input to described
The data voltage of display panel is high, wherein, second high level voltage is lower than the data voltage.
10. oganic light-emitting display device according to claim 7, wherein, second high level voltage is in response to described
The change of the threshold voltage of driving transistor and gradually change.
11. oganic light-emitting display devices according to claim 7, the oganic light-emitting display device also includes timing controlled
Device, the timing controller is configured as monitoring the threshold voltage of the driving transistor, and crystalline substance is driven in response to described to generate
The change of the threshold voltage of body pipe and the power source change signal of the level that gradually steps up second high level voltage, and will
The power source change signal sends the power supply to.
A kind of 12. methods for driving oganic light-emitting display device, the method is comprised the following steps：
Control signal is produced, is made between the first drive scheme and the second drive scheme with for the driving transistor in sub-pixel
Can selectively drive, wherein, first drive scheme and second drive scheme are respectively using for the driving crystal
The saturation region and linear zone of the driving voltage curve of pipe；
Gamma variable signal is produced, gamma value is changed with the drive scheme based on selection；And
Change the level of the high level voltage for being supplied to the sub-pixel based on selected drive scheme.
13. methods according to claim 12, wherein, changing the high level voltage includes：
When selected drive scheme is first drive scheme, the first high level voltage is selected；
When selected drive scheme is second drive scheme, the second high level voltage is selected, wherein, described second is high
Level voltage is lower than first high level voltage.
14. methods according to claim 13, wherein, changing the high level voltage includes：
When the linear zone drive the driving transistor when, in response to the threshold voltage of the driving transistor change and
Gradually increase the level of second high level voltage.
15. methods according to claim 12, the method also includes：
The first control signal is produced when display panel represents low grey level range and middle grey level range, with for the drive
Dynamic transistor enables first drive scheme；And
The second control signal is produced when the display panel represents high grade grey level scope, is made with for the driving transistor
Can second drive scheme.
16. methods according to claim 12, the method also includes, when the view data of display panel to be input to has
During smaller than predetermined threshold parameter value, the drive scheme is changed into the first driving side from second drive scheme
Case.
17. methods according to claim 13, wherein, first high level voltage is than being input to the data of display panel
Voltage is high, wherein, second high level voltage is lower than the data voltage.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0190436 | 2015-12-30 | ||
| KR20150190436 | 2015-12-30 | ||
| KR10-2016-0125627 | 2016-09-29 | ||
| KR1020160125627A KR102563228B1 (en) | 2015-12-30 | 2016-09-29 | Organic Light Emitting Display Device and Method of Driving the same |
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| CN106935189A true CN106935189A (en) | 2017-07-07 |
| CN106935189B CN106935189B (en) | 2019-09-24 |
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| CN201611272979.3A Active CN106935189B (en) | 2015-12-30 | 2016-12-30 | Oganic light-emitting display device and its driving method |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20170081123A (en) | 2017-07-11 |
| KR102563228B1 (en) | 2023-08-07 |
| CN106935189B (en) | 2019-09-24 |
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