CN106935189B - 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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- CN106935189B CN106935189B CN201611272979.3A CN201611272979A CN106935189B CN 106935189 B CN106935189 B CN 106935189B CN 201611272979 A CN201611272979 A CN 201611272979A CN 106935189 B CN106935189 B CN 106935189B
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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]
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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
- 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
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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
- 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
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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
- 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 present invention provides a kind of oganic light-emitting display device and its driving method, which includes display panel, power supply, selective driver and gamma variation driver.Display panel includes sub-pixel.Power supply is configured as exporting the driving voltage for driving sub-pixel.Selective driver, it is configured as generating control signal, 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 methods.
Background technique
With the development of information technology, wide-scale distribution is obtained as the display equipment for connecting medium between user and information.
In this regard, as a kind of display equipment, organic light emitting display (OLED) equipment is more and more applied.
Oganic light-emitting display device includes: the display panel with multiple sub-pixels；Output drive signal is set as to drive
Move the driver of the display panel；And generate the power supply for being supplied to driver and display panel electric power.Driver may include
The scanner driver of scanning signal or gating signal is provided to display panel and provides the data of data-signal to display panel
Driver.
About the operation of oganic light-emitting display device, when the sub-pixel of display panel receives driving signal (for example, scanning
Signal and data-signal) when, selected sub-pixel issues light beam, causes image and shows.
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 to save its energy consumption.
Summary of the invention
On the one hand, the present invention provides a kind of oganic light-emitting display device, which includes display surface
Plate, power supply, selective driver and gamma change driver.Display panel includes sub-pixel.Power supply is configured as output and is used for
Drive the driving voltage of sub-pixel.Selective driver is configured as generating control signal, for the drive in each sub-pixel
Dynamic transistor enables selectivity driving between the first drive scheme and the second drive scheme, and is 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 present invention provides the driving methods of oganic light-emitting display device.This method comprises: generating control letter
Number, for the driving transistor in each sub-pixel, selectivity is enabled between the first drive scheme and the second drive scheme and is driven
It is dynamic, wherein the first drive scheme and the second drive scheme to driving transistor use respectively driving voltage curve saturation region and
Linear zone；Gamma variable signal is generated, to change gamma value based on the drive scheme of selection；And the driving side based on selection
Case changes the level of the high level voltage for being supplied to sub-pixel.
Detailed description of the invention
The attached drawing for including for provide it is of the invention further understand, it includes in a specific embodiment of the invention simultaneously
A part of a specific embodiment of the invention is constituted, and comes together to explain the principle of the present invention with specification.
Fig. 1 is the functional block diagram of the oganic light-emitting display device of first embodiment according to the present invention.
Fig. 2 schematically illustrates Fig. 1 sub-pixel structure figure.
The circuit structure of Fig. 3 expression prior art sub-pixel.
Fig. 4 is the current -voltage curve of the driving transistor of the prior art driving method based on prior art sub-pixel
Figure.
Fig. 5 indicates the circuit structure of the sub-pixel of first embodiment according to the present invention.
Fig. 6 is the current -voltage curve of the driving transistor of first embodiment according to the present invention.
Fig. 7 is the gamma electric voltage-gray level for being used to describe gray level expressional scheme of first embodiment according to the present invention
Curve graph.
Fig. 8 is brightness-grey scale curve figure of the gray level expressional scheme based on Fig. 7.
Fig. 9 is the adaptive gamma curve figure of first embodiment according to the present invention reached for grey scale table.
Figure 10 instantiates the exemplary structure of the equipment of first embodiment according to the present invention.
Figure 11 is indicated for describing the driving method of the oganic light-emitting display device of first embodiment according to the present invention
Drive transistor current-voltage curve.
Figure 12 shows the frame of the interested component of the oganic light-emitting display device of first embodiment according to the present invention
Figure.
Figure 13 shows the modular construction of first embodiment according to the present invention.
Figure 14 shows the modular construction of second embodiment according to the present invention.
Figure 15 instantiates the functional block diagram of oganic light-emitting display device according to the second embodiment of the present invention.
Figure 16 schematically illustrates the structure of the sub-pixel of Figure 15.
Figure 17 instantiates the circuit structure of sub-pixel according to the second embodiment of the present invention.
Figure 18 is the current -voltage curve figure of the driving transistor of second embodiment according to the present invention.
Figure 19 is the drive for describing the driving method of the oganic light-emitting display device of second embodiment according to the present invention
Voltage-gray level curve figure of dynamic transistor.
Figure 20 describes the problem of driving transistor degradation.
Figure 21 shows the driving for describing high level voltage change programme according to the second embodiment of the present invention
The current -voltage curve figure of transistor.
Figure 22 shows the modular construction of third embodiment according to the present invention.
Figure 23 shows the modular construction of fourth embodiment according to the present invention.
Specific embodiment
Referring now to the drawings referring in detail to the embodiment of the embodiment of the present application.
Hereinafter, a 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 type or etching stop ES type.
According to the semiconductor 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 type.
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 phone).
<first embodiment>
Fig. 1 is the functional block diagram of the oganic light-emitting display device of first embodiment according to the present invention.Fig. 2 schematically example
The structure of Fig. 1 sub-pixel is shown.
As shown in Figure 1, oganic light-emitting display device may include host system 1000, timing controller 170, data-driven
Device 130, power supply 140, gate driver 150 and display panel 110.
Host system 1000 may include the SoC (system on a chip) for being internally provided with scaler, and can will input
The digital video data of video is converted into the data-signal for being suitble to format, then defeated for being shown by display panel 110
Out by the data-signal of conversion.Multiple timing signals can be supplied to timing control together with data-signal by host system 1000
Device 170 processed.
The timing signal of Intrusion Detection based on host system 1000, such as based on vertically and horizontally synchronization signal, data enable signal, master
Clock signal etc., timing controller 170 can be configured to the operation timing of control data driver 130 and gate driver 150.
Timing controller 170, which can be configured as, executes video processing, compensation data for the data-signal from host system 1000
Deng the data-signal for being handled and being compensated then is supplied to data driver 130.
Data driver 130 can be configured as to be carried out based on the data controlling signal DDC etc. from timing controller 170
Operation.Data driver 130 can be configured as the data-signal DATA conversion of the digital form of self-timing in future controller 170
At the data-signal of analog form, converted signal is then exported.
About this point, based on the gamma electric voltage of the gamma module inside or outside data driver 130, data-driven
Device 130 can be configured as the data-signal that the data-signal DATA of digital form is converted into analog form.Data driver
130 are supplied to data-signal the data line DL1 to DLn of display panel 110.
Gate driver 150 can be configured as to be grasped based on the gate control signal GDC from timing controller 170
Make.Gate driver 150 can be configured as output gating high voltage or gate the gating signal or scanning signal of low-voltage.
Gate driver 150, which can be configured as, sequentially exports forward or inverse gating signal.Gate driver
150 can be configured as the gating line GL1 to GLm that gating signal is supplied to display panel 110.
Power supply 140 can be configured as high level voltage (drain voltage) EVDD exported for driving display panel 110
With low level voltage (source voltage) EVSS, and collector voltage VCC and ground voltage for driving data driver 130
GND etc..In addition, power supply 140 can be configured as voltage needed for generation shows equipment operation, such as it is transmitted to gate driver
150 gating high voltage or gating low-voltage.
Display panel 110 may include sub-pixel SP, the data line DL1 to DLn for being connected respectively to sub-pixel SP, be separately connected
To the gating line GL1 to GLm of sub-pixel SP.Based on the gating signal from gate driver 150 and come 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 lower substrate.
As shown in Fig. 2, single sub-pixel includes being connected to gating line GL1 and data line 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 pixel circuit PC of DATA operation.Pixel circuit PC may include driving transistor, storage, Organic Light Emitting Diode and picture
Plain compensation circuit.Pixel compensation circuit can be configured as compensation driving transistor, storage and Organic Light Emitting Diode
At least one of.
Pixel compensation circuit can be configured as the characteristic of compensation 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 it works together with external circuit.Pixel compensation circuit may include at least one thin film transistor (TFT) and capacitor.Pixel compensation electricity
Road can have different structures according to compensation method.Therefore, further describing for its structure will be omitted.
Fig. 3 instantiates the circuit structure of prior art sub-pixel.Fig. 4 is that the prior art based on prior art sub-pixel is driven
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
It moves to operate sub-pixel.Therefore, should include high level driving voltage (that is, high level Vds and EVDD).
In this way, since prior art oganic light-emitting display device is in the saturation region of current -voltage curve driving driving crystal
Pipe DTFT should use high level voltage EVDD, result in unnecessary power consumption.
Fig. 5 instantiates the circuit structure of sub-pixel according to the first embodiment of the present invention.Fig. 6 is according to the present invention
Drive transistor current-voltage curve of first embodiment.Fig. 7 be according to the present invention first embodiment for describing
The gamma electric voltage of gray level expressional scheme-gray level curve figure.Fig. 8 is brightness-gray scale of the gray level expressional scheme based on Fig. 7
Curve graph.Fig. 9 is the adaptive gamma curve figure of first embodiment according to the present invention reached for grey scale table.Figure 10 is illustrated
The exemplary structure of the equipment of first embodiment according to the present invention.Figure 11 is shown for describing the first reality according to the present invention
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, first embodiment according to the invention, in order to make the power consumption of oganic light-emitting display device
It reduces, the combination of the zone of saturation and linear region of current -voltage curve can be used for the driving transistor DTFT in sub-pixel
Driving.
Further, in order to make the lower power consumption of oganic light-emitting display device, the level of high level voltage EVDD is convertible into
The low level of level than forming the data voltage VDATA of data-signal.
For example, according to embodiment of the present invention, when driving transistor is generated for driving Organic Light Emitting Diode
Electric current I_oled when, the level as the high level voltage EVDD for generating mono- parameter of target current I_target can be with
P1 level is reduced to from P2 level.
When the driving transistor DTFT in sub-pixel uses the linear zone of curve, the level of high level voltage EVDD is compared
It can be lowered in the method for the prior art.In this way, the method for the stress level of transistor receiving compared with the prior art can be subtracted
It is small.As a result, the degeneration of transistor is it can be desirable to by prolonging compared to the art methods that driving transistor uses saturation region to drive
The slow longer time cycle.
Fig. 5 instantiates usually used 2T1C structure, two of them transistor SW and DTFT and capacitor by example
Device Cst is for driving Organic Light Emitting Diode (OLED).However, the present invention is not limited thereto.On the contrary, the present invention can be used for 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, linear gamma Linear GMA can be used in the driving method of first embodiment according to the present invention
To indicate the gray level of low and middle range, and high grade grey level range is indicated using non-linear gamma (for example, 2.2GMA).This is
Because using the zone of saturation for indicating low and middle range gray level, and using expression when indicating gray level using real pixel
The linear region of high grade grey level range drives driving transistor.
In this regard, adaptive gamma curve algorithm can be used in the driving method of first embodiment according to the present invention,
Algorithm including determining gamma change point (GCP).Using adaptive gamma curve algorithm, can be changed in a manner of adaptive obtain
GCP。
When changing gamma value using adaptive gamma curve algorithm, when driving the transistor using linear region driving
Data voltage can be improved without independent device.When using adaptive gamma curve, grey scale curve can low gray level, in
Change between gray level and high grade grey level range.
As shown in figure 9, gamma change point (GCP) can be determined based on data voltage level.Although data voltage level indicates
Identical gray level, but data voltage level can be different.That is, for example, because based on being controlled using peak brightness
(PLC) peak value of the average picture level (APL) of algorithm, data voltage level is alterable.
Therefore, although data voltage level indicates identical gray level, data voltage level can be 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 linear region based on data voltage level or be 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, which is configured such that, can be based on timing controller 170
(T-con) the gamma variable signal GMAC sent controls the gamma change point (GCP) of gamma module 135 (GMAIC).
In this regard, the module or algorithm for changing driving transistor driving scheme are included in timing controller 170.So
And the present invention is not limited thereto.Independent circuits mould is formed as changing the module or algorithm of driving transistor driving scheme
Block.In this case, gamma variable signal GMAC can be issued by independent circuits module.
As shown in figure 11, in the driving method of the oganic light-emitting display device of first embodiment according to the present invention, it is
It avoids driving deteriroation of image quality caused by driving transistor using linear zone, is desired to have this deteriroation of image quality
Image data can undergo different drive schemes.
For example, executing (a) institute such as Figure 11 when having input the undesirable image data with this deteriroation of image quality
The drive scheme shown.That is, driving driving transistor using linear zone, and the level deviation of high level voltage EVDD is to than data electricity
The level for pressing the level of VDATA low.
On the contrary, being executed as shown in (b) of Figure 11 when having input the image data for being desired to have this deteriroation of image quality
Drive scheme.That is, driving driving transistor using saturation region, and the level deviation of high level voltage EVDD is to than data voltage
The high level of the level of VDATA.
In this regard, as first embodiment, in order to be based on this image matter whether occurs to specific image data
The drive scheme of driving transistor is degenerated and switched to amount, this OLED device is settable as follows:
Figure 12 shows the interested block component diagram of the oganic light-emitting display device of first embodiment according to the present 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
160, 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 driving is enabled between drive scheme.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.For enabled such selectivity driving, selective driver 160 may include non-thread
Property (or normally) driver 161, Linear actuator 163 and gamma variation driver 165.
Non-linear or normal driving device 161, which can be configured as, generates the first driving control signal, executes the with instruction
One drive scheme.That is, driving sub- picture in display panel using saturation region or inelastic region using the first driving control signal
The driving transistor of element.In this regard, when non-linear driver 161 exports the first driving control signal to power supply 140, power supply
It can be configured as from high level voltage EVDD and be displaced to level more higher than the level of data voltage VDATA.
Linear actuator 163, which can be configured as, generates the second driving control signal to indicate to execute the second drive scheme.
That is, driving the driving of sub-pixel in display panel brilliant using linear zone or non-saturated region using the second driving control signal
Body pipe.In this regard, when non-linear driver 161 exports the second driving control signal to power supply 140, power supply can be configured
To be displaced to level more lower than the level of data voltage VDATA from high level voltage EVDD.
When having input the image data with desired deteriroation of image quality, Linear actuator 163 can utilize saturation region
To force the driving transistor in the sub-pixel in driving display panel.In other words, when having input with desired picture quality
It is linear to drive although drive scheme linear driver 163 is arranged to the second drive scheme when the image data of degeneration
Dynamic device 163 can be forced not executing the second drive scheme, but execute the first drive scheme for using saturation region.
For this purpose, Linear actuator 163 can be configured to base search table, look-up table includes estimating as deteriroation of image quality
The parameter of required factor.Look-up table can be used as data storage in memory.Alternatively, linear transducer 163 can be by
It is configured to using image analysis algorithm come forecast image quality degradation.
Factor needed for deteriroation of image quality estimation may include but be not limited to average picture level (APL), You Jifa
Total current (total EL electric current), the peak value of gray level, image complexity, driving frequency, crosstalk mode for being flowed in optical diode etc..
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 that compare current image date
Value, and enable driving transistor less than parameter threshold based on the parameter value for determining current image date and driven using saturation region.
For example, Linear actuator 163 can be with non-linear driver 161 when being determined that deteriroation of image quality occurs for expectation
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 normal driving device 161 changes to logically high.
Based on characteristic parameter and according to the predetermined condition of this OLED device, gamma variation driver 165 be can be configured as
Gamma value is set.Variation based on drive scheme, gamma variation driver 165 can be configured as output gamma model
The gamma variable signal of middle instruction gamma change point.Gamma variation 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 the data-signal that analysis is input to display panel, and compensate due to making respectively
With display panel caused by the selectivity driving between saturation region and the first drive scheme and the second drive scheme of linear zone
Characteristic variations.Further, compensating module 180 can be configured to compensate the display surface caused by the variation of gamma change point
Plate characteristic variations.
Further, compensating module 180, which can be configured as, calculates display panel characteristic variations (for example, by using linearly
The decline of IR caused by the driving in area), then compensate the variation.For this purpose, the gamma variable signal based on gamma variation driver 165
With the analysis of data-signal, compensating module 180, which can be configured as, to be produced and exported for compensating display panel characteristic variations
Thermal compensation signal.
First embodiment according to the present invention can save the power consumption of this OLED device, and simultaneously, by being based on image matter
The selective drive scheme of amount degeneration estimation, can further postpone the degeneration for driving transistor.For this purpose, providing a kind of drive has
The method of machine light-emitting display apparatus, this method comprises: generating control signal to the driving transistor in sub-pixel to drive first
Selectivity driving is enabled between dynamic scheme and the second drive scheme, 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 generated based on selected drive scheme to change
Become gamma value；Change the level for being supplied to the high level voltage of 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 indicated, oganic light-emitting display device can be with
It is modular as first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 can have host
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 indicated
Turn to first circuit board BD1, second circuit board BD2 and display panel 110.First circuit board BD1 has host 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 be arranged in first circuit board BD1
On power supply 140 between the first high level voltage EVDD1 and the second high level voltage EVDD2 enable selectively power.One
In a embodiment, it is (linear that the first high level voltage EVDD1 (saturation region driving voltage) can be 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
It while non-linear driver generates, generates first switch and controls signal, wherein the first driving control signal is enabled to use saturation
Driving of the area (that is, inelastic region) to driving transistor.
Further, timing controller 170, which can be configured as, is exporting gamma variable signal when needing gamma to change
GMAC.It is provided and the based on gamma variable signal GMAC to data driver 130 for example, gamma module 135 can be configured as
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
It changes circuit ST and can be configured as and operated, so that the first high level voltage EVDD1 from power supply 140 is provided to display
Panel 110.In this way, display panel 110 can be worked based on the operating condition of saturation region.
Timing controller 170 can be configured as, and generate in the Linear actuator that the inside of timing controller 170 is arranged in
It while second driving control signal, generates second switch and controls signal, wherein the second driving control signal is enabled using linear
Driving of the area (that is, the region changed) to driving transistor.
Further, when needing gamma to change, timing controller 170 can be configured as output gamma variable signal
GMAC.For example, being based on gamma variable signal GMAC, gamma module 135 can be configured as to be 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, which can be configured as, to be operated, so that the second high level voltage EVDD2 from power supply 140 is supplied to display surface
Plate 110.In this way, display panel 110 can be worked based on the operating condition of linear zone.
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 system
100 receive two EVDD, and the calculated result (parameter calculated result) based on timing controller 170 selects two EVDD wherein
One (this is directed to Figure 13).Selectable, voltage conversion circuit ST receives the calculated result by timing controller 170 as anti-
Feedback, and one of them (this is directed to Figure 14) based on two EVDD of feedback selection.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 above structure.
<second embodiment>
Figure 15 is the functional block diagram of organic light-emitting display device according to the second embodiment of the present invention, and Figure 16 is schematic
The structure of 15 sub-pixel of earth's surface diagram.
As shown in figure 15, oganic light-emitting display device may include host system 1000, timing controller 170, data drive
Dynamic device 130, power supply 140, gate driver 150 and display panel 110.
Host system 1000 may include the SoC (system on chip) for being internally provided with scaler (scaler), and can will input
The digital video data of video is converted into the data-signal of appropriate format, and to be shown by display panel 110, then output is through turning
The data-signal changed.Multiple timing signals can be supplied to timing controller 170 together with data-signal by host system 1000.
The timing signal of Intrusion Detection based on host system 1000, such as based on vertically and horizontally synchronization signal, data enable signal, master
Clock signal etc., timing controller 170 can be configured as control data driver 130 and the work of gate driver 150 is fixed
When.Timing controller 170 can be configured as and execute video processing for the data-signal from host system 1000, data are mended
It repays, the data-signal for being handled and being compensated then is supplied to data driver 130.
Data driver 130 can be configured as based on works such as 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 simulating
Then the data-signal of form exports converted signal.
About this point, based on the gamma electric voltage of the gamma module inside or outside data driver 130, data-driven
Device 130 can be configured as the data-signal that the data-signal DATA of digital form is converted into analog form.Data driver
130 are supplied to data-signal the data line DL1 to DLn of display panel 110.
Gate driver 150 can be configured as to be grasped based on the gate control signal GDC from timing controller 170
Make.Gate driver 150 can be configured as output gating high voltage or gate the gating signal or scanning signal of low-voltage.
Gate driver 150, which can be configured as, sequentially exports forward or inverse gating signal.Gate driver
150 can be configured as the gating line GL1 to GLm that gating signal is supplied to display panel 110.
Power supply 140 can be configured as high level voltage (drain voltage) EVDD exported for driving display panel 110
With low level voltage (source voltage) EVSS, and collector voltage VCC and ground voltage for driving data driver 130
GND etc..In addition, power supply 140 can be configured as voltage needed for generation shows equipment operation, such as it is transmitted to gate driver
150 gating high voltage or gating low-voltage.
Display panel 110 may include sub-pixel SP, the data line DL1 to DLn for being connected respectively to sub-pixel SP, be separately connected
To the gating line GL1 to GLm of sub-pixel SP.Based on the gating signal from gate driver 150 and come 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 lower substrate.
As shown in figure 16, single sub-pixel includes being connected to gating line GL1 and data line DL1 (or between them
Crosspoint on) switching thin-film transistor SW and be configured as based on by switching thin-film transistor SW provide data letter
The pixel circuit PC of number DATA operation.Pixel circuit PC may include driving transistor, storage, Organic Light Emitting Diode and
Pixel compensation circuit.Pixel compensation circuit can be configured as compensation driving transistor, storage and organic light-emitting diodes
At least one of pipe.
Pixel compensation circuit can be configured as the characteristic of compensation 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 it works together with external circuit.Pixel compensation circuit may include at least one thin film transistor (TFT) and capacitor.Pixel compensation electricity
Road can have different structures according to compensation method.Therefore, further describing for its structure will be omitted.
Figure 17 instantiates the circuit structure of sub-pixel according to the second embodiment of the present invention, and Figure 18 is according to the present invention
Drive transistor current-voltage curve of second embodiment, Figure 19 are for describing the second embodiment party according to the present invention
Voltage-gray level curve figure of the driving transistor of the driving method of the oganic light-emitting display device of formula, Figure 20 describe driving
The degenerate problem of transistor, and Figure 21 shows and becomes for describing high level voltage according to the second embodiment of the present invention
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 function of oganic light-emitting display device
Consumption reduces, and the combination of the zone of saturation and linear region of current -voltage curve can be used in the driving transistor DTFT in sub-pixel
To drive.
Further, in order to make the lower power consumption of oganic light-emitting display device, the level of high level voltage EVDD is convertible into
The low level of level than forming the data voltage VDATA of data-signal.
For example, second embodiment according to the present invention, when driving transistor is generated for driving Organic Light Emitting Diode
Electric current I_oled when, the level as the high level voltage EVDD for generating mono- parameter of target current I_target can be with
P1 level is reduced to from P2 level.
When the driving transistor DTFT in sub-pixel uses the linear zone of curve, the level of high level voltage EVDD is compared
It can be lowered in the method for the prior art.In this way, the method for the stress level of transistor receiving compared with the prior art can be subtracted
It is small.As a result, the degeneration of transistor is it can be desirable to by prolonging compared to the art methods that driving transistor uses saturation region to drive
The slow longer time cycle.
Figure 17 instantiates usually used 2T1C structure, two of them transistor SW and DTFT and capacitor by example
Device Cst is for driving Organic Light Emitting Diode (OLED).However, the present invention is not limited thereto.On the contrary, the present invention can be used for 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 according to the second embodiment of the present invention can be used linear
Gamma Linear GMA indicates high using non-linear gamma (for example, 2.2GMA) to indicate the gray level of low and middle range
Grey level range.This is because using the saturation for indicating low and middle range gray level when indicating gray level using real pixel
Region, and driving transistor is driven using the linear region of high grade grey level range is indicated.
As shown in figure 19, in the driving method of oganic light-emitting display device according to the second embodiment of the present invention,
In order to avoid use linear zone drive driving transistor caused by deteriroation of image quality, be desired to have this picture quality and move back
The image data of change can undergo different drive schemes.
For example, executing (a) institute such as Figure 19 when having input the undesirable image data with this deteriroation of image quality
The drive scheme shown.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.
On the contrary, being executed as shown in (b) of Figure 19 when having input the image data for being desired to have this deteriroation of image quality
Drive scheme.That is, driving transistor is driven using saturation region, and the level conversion of high level voltage EVDD is than data voltage
The high level of the level of VDATA.
However, from (a) of Figure 19 as can be seen that when driving transistor to drive using linear zone, it is necessary to improve data
Voltage VDATA is to meet target current I_target.In this way, improving data voltage Wei target current I_target is met
The example of the timing of VDATA is interpretable as follows:
As shown in figure 20, when driving transistor DTFT driving time it is continuous, or driving transistor DTFT positive voltage
When continuously applying, due to deteriroation of image quality, threshold voltage vt h is being deviated forward.In this case, transistor is driven
The Vgs (or Vgs-Vth) of DTFT is gradually decreased, therefore data voltage VDATA should be further increased to meet target current
I_target。
Therefore, when due to deteriroation of image quality, when driving the threshold voltage forward migration of transistor DTFT, data voltage
VDATA should be further increased, however at this point, due to data driver limited output area, it may appear that constraint.Namely
It says, solves such problems and be difficult, that is, for example such situation, due to limited output area, data driver can not
It improves data voltage VDATA and exceeds constant range.
In addition, if continuously causing this deteriroation of image quality problem, the degeneration deviation of threshold voltage be based on position or
The sub-pixel of person's display panel and disperse, cause on display panel the service life of increased screen stain and display panel to reduce.
According to experimental result, when driving driving transistor using linear zone, which is likely to occur more serious, 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 having input the undesirable image data with this deteriroation of image quality, linear zone is used
Driving transistor is driven, the level of high level voltage EVDD can be exchanged into the level lower than data voltage VDATA.Meanwhile root
It, can be by avoiding improving data voltage VDATA and gradually increasing high level voltage EVDD according to the degenerative character of driving transistor
Level, keep target current I_target.
That is, second embodiment according to the present invention, driving transistor is driven using linear zone, crystal is driven
The degenerative character (for example, threshold voltage) of pipe is monitored or incudes.Further, when the degenerative character (example of driving transistor
Such as, threshold voltage) deviate timing controller 170 in be arranged reference range (for example, reference threshold voltage) when, avoid data
The increase of voltage VDATA, and the level of high level voltage EVDD gradually increases.
In order to promote the understanding of specification, the comparison of first embodiment and second embodiment can be described as follows:
In the first embodiment, in order to drive driving transistor using linear zone and generate 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 and to generate target current I_ using linear zone
The level of target, high level voltage EVDD are 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, drive transistor degenerative character (for example,
Threshold voltage) monitored or induction, and the variation in response to driving the degenerative character (for example, threshold voltage) of transistor, high electricity
Level PV1, PV2, PV3 of ordinary telegram pressure EVDD is gradually increased.
For example, level PV1, PV2, PV3 of high level voltage EVDD the direction P2 and threshold voltage variation proportionally
It gradually increases.In this way, in this second embodiment, it is contemplated that drive the degenerative character and compensation allowance of transistor, high level electricity
Level PV1, PV2, PV3 of pressure EVDD is also deviated.Simultaneously as whole sub-pixels are provided with the high level electricity gradually deviated jointly
EVDD is pressed, so it could not be expected that global compensation effect.
As explained above, when driving transistor DTFT threshold voltage forward migration be more than steady state value (for example,
By the reference threshold voltage of experimental setup) when, only by improving data voltage VDATA, hardly results in and meet target current I_
The allowance of target.However, second embodiment according to the present invention, as level PV1, PV2, PV3 of high level voltage EVDD
In response to driving the variation of the threshold voltage of transistor when deviating, it is able to carry out due to only from data voltage VDATA additional
Compensation, so obtaining the allowance that can satisfy target current I_target.
Therefore, second embodiment according to the present invention, compared with first embodiment, due to improving data voltage
The allowance that VDATA can be deviated, it can be ensured that compensation range is (for example, compensate necessary output to data voltage
Range) in bigger width.
In this regard, in this second embodiment, in order to based on this picture quality whether occurs to special image data
It degenerates to switch the drive scheme of driving transistor, and gradually switches the level of high level voltage EVDD, this OLED device can be set
It sets as follows:
Figure 22 shows modular construction according to the third embodiment of the present invention.Figure 23 shows according to the present invention
The modular construction of 4th embodiment.
As shown in figure 22, the third modular construction of oganic light-emitting display device is indicated, 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, which can have, to be arranged on
Host system 1000 and power supply 140.Second circuit board BD2 can have the timing controller 170 being arranged on, gamma module
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 function identical with those examples shown in first embodiment or second embodiment or operation.However, due to
This is not the main feature of second embodiment, and illustrating will be referring to first embodiment or second embodiment of the invention
It discusses part.
As shown in figure 23, the 4th modular construction of organic light-emitting display device is indicated, 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, which can have, to be arranged on
Host system 1000, power supply 140 and voltage conversion circuit ST.Second circuit board BD2 can have the timing control being arranged on
Device 170 processed and gamma module 135.Voltage conversion circuit ST may be provided at the internal or external of power supply 140.However, not due to this
It is the main feature of second embodiment, illustrates the part referring to first embodiment or second embodiment of the invention
It discusses.
Timing controller 170 can be configured as output switch control signal STC, with from be arranged in first circuit board BD1
On power supply 140 between the first high level voltage EVDD1 and the second high level voltage EVDD2 enable selectively power.One
In a embodiment, it is (linear that the first high level voltage EVDD1 (saturation region driving voltage) can be 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
It while non-linear driver generates, generates first switch and controls signal, wherein the first driving control signal is enabled to use 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 to display panel
110.In this way, display panel 110 can be worked based on the operating condition of saturation region.
Timing controller 170 can be configured as, and generate the by the Linear actuator that is arranged in timing controller 170
While two driving control signal, generate second switch control signal, wherein the second driving control signal using linear zone (that is,
The region of change) come enable drive transistor driving.
Further, timing controller 170 continuously monitors or induction drives the degenerative character (such as Vth) of transistor,
And power source change signal EVC is generated based on the degenerative character (such as Vth) of driving transistor, high level voltage is gradually increased
Level.Drive the degenerative character (such as Vth) of transistor from the reference range being arranged in timing controller 170 at this point, working as
When (reference threshold voltage) deviates, timing controller 170 executes 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 to display panel
110.In this way, display panel 110 can the operating condition based on linear zone come work.When timing controller 170 has outputed
When 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 selectively being driven using between saturation region and linear zone to the driving transistor in sub-pixel
Caused high level voltage changes, and the present invention can reduce power consumption.Further, the present invention can consider whether be saturated due to utilizing
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
In addition deteriroation of image quality that system may can be generated due to drive scheme variation.Further, by optionally by
The driving transistor in sub-pixel is driven between saturation region and linear zone, the present invention can further postpone to drive transistor
It degenerates.In addition, when using linear zone driving driving transistor, gradually by the variation in response to drive transistor threshold voltage
Change high level voltage, the service life of product can be improved in the present invention.
This application claims South Korea patent application filed on December 30th, 2015 the 10-2015-0190436th and 2016
No. 10-2016-0125627 priority filed on September 29, herein to all purposes is quoted in this application whole
Hold as reference, as being fully explained the same in this article.
Claims (17)
1. a kind of oganic light-emitting display device, the oganic light-emitting display device include:
Display panel, the display panel include sub-pixel；
Power supply, the power supply are configured as exporting the driving voltage for driving the sub-pixel；
Selective driver, the selectivity driver are configured as generating control signal, each to be directed to based on image data
Driving transistor in sub-pixel enables selectivity driving between the first drive scheme and the second drive scheme, and based on by institute
The drive scheme of selective driver selection is stated to change gamma value, wherein first drive scheme and second driving
Scheme uses the saturation region and linear zone of driving voltage curve respectively,
Wherein, the gamma value is changed to use for first drive scheme and second drive scheme respectively linear
Gamma and non-linear gamma.
2. oganic light-emitting display device according to claim 1, wherein the selectivity driver is configured as:
First control signal is generated when the display panel represents low grey level range and middle grey level range, to be directed to institute
It states driving transistor and enables first drive scheme；And
Second control signal is generated when the display panel represents high grade grey level range, to make for the driving transistor
It can second drive scheme.
3. oganic light-emitting display device according to claim 1, wherein the selectivity driver is configured as: being based on
The analysis of the image data of the display panel is input to as a result, in first drive scheme and second drive scheme
Between enable selectivity driving.
4. oganic light-emitting display device according to claim 1, wherein the selectivity driver is configured as: when wanting
When being input to the image data of the display panel has 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 it is described selectivity driver include:
Non-linear driver, the non-linear driver are configured as generating first control signal, to enable utilizing described first
Drive scheme drives the driving transistor in the sub-pixel；
Linear actuator, the Linear actuator are configured as generating second control signal, to enable second driving is utilized
Scheme drives the driving transistor in the sub-pixel；And
Gamma changes driver, and the gamma variation driver is configured as 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 selectivity driver further includes compensation mould
Block, the compensating module are configured as to due to the choosing between first drive scheme and second drive scheme
Display panel characteristic variations compensate caused by the driving of selecting property.
7. oganic light-emitting display device according to claim 1, wherein the power supply is configured as:
When driving the driving transistor in the sub-pixel using the saturation region, Xiang Suoshu display panel supply first
High level voltage；And
When driving the driving transistor in the sub-pixel using the linear zone, Xiang Suoshu display panel provides second
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 switching circuit, the switch
Circuit is configured to selectively enable to the display panel and provides first high level voltage and second high level
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
It drives the variation of the threshold voltage of transistor and gradually changes.
11. oganic light-emitting display device according to claim 7, the oganic light-emitting display device further includes timing controlled
Device, the timing controller is configured as monitoring the threshold voltage of the driving transistor, brilliant in response to the driving to generate
The power source change signal of the variation of the threshold voltage of body pipe and level that second high level voltage is gradually increased, and will
The power source change signal sends the power supply to.
12. a kind of method for driving oganic light-emitting display device, method includes the following steps:
Control signal is generated, to drive for the driving transistor in sub-pixel in the first drive scheme and second based on image data
Selectivity driving is enabled between dynamic scheme, wherein first drive scheme and second drive scheme are respectively using being directed to
The saturation region and linear zone of the driving voltage curve of the driving transistor；
Gamma variable signal is generated, to change gamma value based on the drive scheme of selection；And
Change the level for being supplied to the high level voltage of the sub-pixel based on selected drive scheme,
Wherein, the gamma value is changed to use for first drive scheme and second drive scheme respectively linear
Gamma and non-linear gamma.
13. according to the method for 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. according to the method for claim 13, wherein changing the high level voltage includes:
When the linear zone drive the driving transistor when, in response to it is described drive transistor threshold voltage variation and
It is gradually increased the level of second high level voltage.
15. according to the method for claim 12, this method further include:
First control signal is generated when display panel represents low grey level range and middle grey level range, to be directed to the drive
Dynamic transistor enables first drive scheme；And
Second control signal is generated when the display panel represents high grade grey level range, to make for the driving transistor
It can second drive scheme.
16. according to the method for claim 12, this method further includes, when the image data of display panel to be input to has
When smaller than predetermined threshold parameter value, the drive scheme is changed into the first driving side from second drive scheme
Case.
17. according to the method for claim 13, wherein data of first high level voltage than being input to display panel
Voltage is high, wherein second high level voltage is lower than the data voltage.
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| KR10-2015-0190436 | 2015-12-30 | ||
| KR20150190436 | 2015-12-30 | ||
| KR1020160125627A KR102563228B1 (en) | 2015-12-30 | 2016-09-29 | Organic Light Emitting Display Device and Method of Driving the same |
| KR10-2016-0125627 | 2016-09-29 |
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| KR102648416B1 (en) | 2016-12-26 | 2024-03-19 | 엘지디스플레이 주식회사 | Organic Light Emitting Display Device and Method of Driving the same |
| CN110709919A (en) * | 2017-11-17 | 2020-01-17 | 深圳市柔宇科技有限公司 | Pixel circuit, flexible display screen and electronic device |
| KR20200040052A (en) * | 2018-10-08 | 2020-04-17 | 엘지디스플레이 주식회사 | Display device |
| KR102537314B1 (en) * | 2018-10-17 | 2023-05-30 | 삼성디스플레이 주식회사 | Organic light emitting display device and method of driving the same |
| CN109346001A (en) * | 2018-11-16 | 2019-02-15 | 上海交通大学 | The digital driving method and device of micro- light emitting diode indicator |
| CN112639948A (en) * | 2018-12-27 | 2021-04-09 | 深圳市柔宇科技股份有限公司 | Screen driving method, display panel and display device |
| US10624190B1 (en) * | 2019-01-21 | 2020-04-14 | Mikro Mesa Technology Co., Ltd. | Micro light-emitting diode driving circuit and method for driving the same |
| CN110942739B (en) * | 2019-12-18 | 2023-05-30 | 京东方科技集团股份有限公司 | Method for determining control voltage of transistor |
| CN111179818A (en) * | 2020-02-22 | 2020-05-19 | 禹创半导体(广州)有限公司 | Micro LED display device |
| TWI805176B (en) * | 2022-01-07 | 2023-06-11 | 友達光電股份有限公司 | Display device and driving method thereof |
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|---|---|
| KR102563228B1 (en) | 2023-08-07 |
| CN106935189A (en) | 2017-07-07 |
| KR20170081123A (en) | 2017-07-11 |
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