CN107068053A - Compensation data method and compensation device, the display device of OLED display - Google Patents
Compensation data method and compensation device, the display device of OLED display Download PDFInfo
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- CN107068053A CN107068053A CN201710094701.XA CN201710094701A CN107068053A CN 107068053 A CN107068053 A CN 107068053A CN 201710094701 A CN201710094701 A CN 201710094701A CN 107068053 A CN107068053 A CN 107068053A
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
Abstract
The embodiment of the present invention provides a kind of the compensation data method and compensation device, display device of OLED display, display technology field, in the case where not influenceing display frame the threshold voltage of driving thin film transistor (TFT) can be obtained in real time, and the threshold voltage of each driving thin film transistor (TFT) is compensated.The compensation data method includes obtaining OLED display display frame queue to be shown in a time interval；Offset voltage to driving thin film transistor (TFT) in each sub-pix in display frame is compensated, offset voltage is the threshold voltage for driving thin film transistor (TFT) in the sub-pix, so as in the time interval, show each display frame in frame queue successively with default display frequency, and show that frame shows that one detects picture after showing in a pre-position of display frame queue；The offset voltage of driving thin film transistor (TFT) in the row sub-pix in next time interval is updated according to the threshold voltage of thin film transistor (TFT) is driven in the row sub-pix.
Description
Technical field
The present invention relates to display technology field, more particularly to OLED display compensation data method and compensation device,
Display device.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, abbreviation OLED) display device has because of it
The advantages of self-luminous, luminous efficiency height, short response time, fine definition and high-contrast, as currently most potential
Display device.Existing OLED display is broadly divided into AMOLED (Active Matrix OLED) and PMOLED (Passive
Matrix OLED) two major classes, wherein, because AMOLED low manufacture costs, operating temperature range are big, available for portable set
DC driven, the advantages of can be used as the large scale display device of fine definition, increasingly approved by people, also as OLED
The mainstream development trend of display device.
However, AMOLED display device technique, material and design in terms of due to, in use, driving
The threshold voltage vt h of thin film transistor (TFT) easily produces drift, so that cause the display of the display device uneven, accordingly, it would be desirable to
The threshold voltage vt h of detecting driving thin film transistor (TFT) during the use of the display device, and it is compensated to ensure to show
Show quality.
In the prior art, it is many that drive in each sub-pix in the display frame is detected using a frame is extracted in normally display frame
The threshold voltage vt h of thin film transistor (TFT) is moved, and offset voltage is used as by the threshold voltage detected data-signal is mended
Repay, so as to avoid because threshold voltage vt h produces drift, caused by the display quality of display device the problem of decline.
But the threshold for driving thin film transistor (TFT) in the display frame in each sub-pix is detected using one frame of above-mentioned direct extraction
Threshold voltage Vth, can impact to original display frame, be easily caused the problem of section displays frame is lost, cause display picture
Quality reduction.
The content of the invention
Embodiments of the invention provide a kind of the compensation data method and compensation device, display device of OLED display,
The threshold voltage of driving thin film transistor (TFT) can be obtained in real time in the case where not influenceing display frame, and it is brilliant to each driving film
The threshold voltage of body pipe is compensated.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
On the one hand the embodiment of the present invention provides a kind of compensation data method of OLED display, the OLED display
Including multirow sub-pix, each sub-pix includes driving thin film transistor (TFT), and the compensation data method includes：Obtain institute
OLED display display frame queue to be shown in a time interval is stated, the display frame queue is made up of display frame；It is right
The data-signal of each sub-pix is using driving thin film transistor (TFT) in each sub-pix in the time interval in the display frame
Offset voltage is compensated, the offset voltage be the sub-pix in driving thin film transistor (TFT) threshold voltage, so as to
In the time interval, according to the data-signal after each described display frame compensation, show described successively with default display frequency
Each display frame in frame queue is shown, and is shown in the time interval, in a pre-position of the display frame queue
Display one detects picture after frame is shown, the detection picture includes the detection pixel value of at least a line sub-pix；In the sub- picture of a line
When element is shown according to the detection pixel value, the threshold voltage that thin film transistor (TFT) is driven in the row sub-pix, and root are detected
It is thin according to being driven in the row sub-pix in the next time interval of threshold voltage renewal that thin film transistor (TFT) is driven in the row sub-pix
The offset voltage of film transistor.
Further, between threshold voltage renewal next time according to driving thin film transistor (TFT) in the row sub-pix
The offset voltage of thin film transistor (TFT) is driven to include in the row sub-pix in：Film crystal is driven in the relatively more current row sub-pix
The current threshold voltage of pipe and the previous threshold voltage that thin film transistor (TFT) is driven in the row sub-pix in previous time interval；If
The current threshold voltage is differed with the previous threshold voltage, then the current threshold voltage is updated into next time
The offset voltage of thin film transistor (TFT) is driven in the row sub-pix of this in interval；If the current threshold voltage and the previous threshold value electricity
Pressure is identical, then the previous threshold voltage is updated in next time interval drive thin film transistor (TFT) in the row sub-pix
Offset voltage.
Further, it is described to show that frame shows in the time interval, in a pre-position of the display frame queue
Display one detects that picture includes after showing：Shown in the time interval, in described last display frame for showing frame queue
Display one detects picture afterwards.
Further, the time interval is 1s.
Further, in the case that the display frequency of the display frame in the display frame queue to be shown is 60Hz,
The default display frequency is 61Hz, 119Hz or 120Hz.
Further, all detection pixel values are an identical fixed pixel value；Or, the detection pixel value is
The pixel value of corresponding each sub-pix in the previous display frame of detection picture belonging to the detection pixel value.
Further, it is described to show that frame shows in the time interval, in a pre-position of the display frame queue
Display one detects that picture includes after showing：The corresponding data-signal of detection pixel value of each sub-pix in picture will be detected according to the Asia
Pixel is compensated in the offset voltage of current time interval, and is shown according to the data-signal after the detection frame compensation
Show.
On the other hand the embodiment of the present invention also provides a kind of compensation data device of OLED display, and the OLED is shown
Device includes multirow sub-pix, and each sub-pix includes driving thin film transistor (TFT), and the compensation data device includes：Number
According to acquisition module, the display frame queue to be shown in a time interval for obtaining the OLED display, the display
Frame queue is made up of display frame；Memory module, for being stored to the offset voltage that thin film transistor (TFT) is driven in each sub-pix；
Data conversion module, the pre-position insertion one of the display frame queue for being obtained in the data acquisition module is examined
Picture is surveyed, the detection picture includes the detection pixel value of at least a line sub-pix；Compensating module, in the display frame
The data-signal of each sub-pix uses in each sub-pix stored in the time interval in the memory module and drives film
The offset voltage of transistor is compensated, and the offset voltage is the threshold value electricity for driving thin film transistor (TFT) in the sub-pix
Pressure；Display module, in the time interval, according to the compensating module to showing the data after frame compensation each described
Signal, shows each display frame shown in frame queue, and shown in the time interval successively to preset display frequency
The detection picture；Detecting module, for being carried out in a line sub-pix according to the detection pixel value by the display module
During display, the threshold voltage that thin film transistor (TFT) is driven in the row sub-pix is detected, and the threshold voltage is deposited as offset voltage
Store up to memory module；Update module, for driving thin film transistor (TFT) in the row sub-pix that is detected according to the detecting module
Threshold voltage update the offset voltage for driving thin film transistor (TFT) in next time interval in the row sub-pix.
Further, the update module includes memory cell and comparing unit；The memory cell, for passing through institute
Stating in the row sub-pix that detecting module is detected drives the threshold voltage of thin film transistor (TFT) to be stored；The comparing unit,
Present threshold value electricity for driving thin film transistor (TFT) in the row sub-pix in the current time interval that stores the memory cell
Press with driving the previous threshold voltage of thin film transistor (TFT) to be compared in the row sub-pix in previous time interval；If described work as
Preceding threshold voltage is differed with the previous threshold voltage, then the current threshold voltage is updated in next time interval
The offset voltage of thin film transistor (TFT) is driven in the row sub-pix；If the current threshold voltage and the previous threshold voltage phase
Together, then the previous threshold voltage is updated to drive in the row sub-pix in next time interval to the compensation of thin film transistor (TFT)
Voltage.
Further, the corresponding data of detection pixel value for detecting each sub-pix in picture are believed by the compensating module
Offset voltage number according to the sub-pix in current time interval is compensated, and is believed according to the data after the detection frame compensation
Number shown by the display module.
Another further aspect of the embodiment of the present invention also provides a kind of OLED display, including foregoing any compensation data dress
Put.
The embodiment of the present invention provides a kind of the compensation data method and compensation device, display device of OLED display, should
OLED display includes multirow sub-pix, and each sub-pix includes driving thin film transistor (TFT), the number of the OLED display
Include according to compensation method：Obtain OLED display display frame queue to be shown in a time interval, the display frame queue
It is made up of display frame, and the drive in each sub-pix in the time interval is used by the data-signal to each sub-pix in display frame
The offset voltage of dynamic thin film transistor (TFT) is compensated, wherein, offset voltage is the threshold value for driving thin film transistor (TFT) in sub-pix
Voltage；And each display frame in frame queue is shown successively with default display frequency, while in the time interval, Yu Xian
Show that a pre-position of frame queue shows that frame shows that one detects picture after showing, detection picture includes at least a line sub-pix
Pixel value is detected, so, in a time interval including the detection picture being independently arranged with display frame, so as to basis
The need for reality, set and show the display frequency of frame in the time interval, and by detect in picture a line sub-pix according to
When detection pixel value is shown, the threshold voltage that thin film transistor (TFT) is driven in the row sub-pix is detected, and according to the sub- picture of the row
Drive the threshold voltage of thin film transistor (TFT) to update in element and drive thin film transistor (TFT) in next time interval in the row sub-pix
Offset voltage, so as to which in the case where not influenceing display frame, the threshold voltage of driving thin film transistor (TFT) is obtained in real time, and leads to
The data-signal for crossing each sub-pix is compensated to the threshold voltage of each driving thin film transistor (TFT).
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of compensation data method of OLED display provided in an embodiment of the present invention；
Fig. 2 a are a kind of OLED pixel drive circuit including detecting threshold voltage function provided in an embodiment of the present invention；
A kind of Fig. 2 b signal timing diagrams for detecting threshold voltage provided in an embodiment of the present invention；
Fig. 3 is the compensation data method of another OLED display provided in an embodiment of the present invention；
Fig. 4 is a kind of compensation data device of OLED display provided in an embodiment of the present invention；
Fig. 5 is the compensation data device of another OLED display provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of compensation data method of OLED display, and the OLED display includes multirow
Sub-pix, each sub-pix includes driving thin film transistor (TFT), as shown in figure 1, the compensation data method includes：
Step S101, obtain OLED display display frame queue to be shown in a time interval T, display frame team
Row are made up of display frame.
Step S102, the data-signal to each sub-pix in display frame are used in above-mentioned time interval T in each sub-pix
The offset voltage △ V of driving thin film transistor (TFT) are compensated, and offset voltage △ V are the threshold for driving thin film transistor (TFT) in sub-pix
Threshold voltage Vth, so as in above-mentioned time interval T, according to the data-signal after each display frame compensation, to preset display frequency
Each display frame in display frame queue, and being shown in time interval T, in a pre-position of display frame queue successively
Display one detects picture after frame is shown, detection picture includes the detection pixel value of at least a line sub-pix.
It should be noted that first, above-mentioned offset voltage △ V are the threshold voltage for driving thin film transistor (TFT) in sub-pix
Vth is specifically referred to, due to driving the electric current I of thin film transistor (TFT)dsMeet relationship below：
Ids=K (Vgs-Vth)2=K (Vg-Vs-Vth)2
Wherein, Vgs is the voltage difference of driving thin-film transistor gate and source electrode, and Vth is the threshold value of driving thin film transistor (TFT)
Voltage, Vg is the voltage of driving thin-film transistor gate, and Vs is the voltage of driving thin film transistor (TFT) source electrode.
When offset voltage △ V are Vth, electric current Is of the above-mentioned threshold voltage vt h to driving thin film transistor (TFT) can be eliminatedds
Influence, i.e. Ids=K (Vg-Vs)2, therefore, the threshold voltage by thin film transistor (TFT) is driven is used in actual compensation process
Vth is compensated as offset voltage △ V to data-signal, and the data-signal of the data-signal after compensation as display frame is entered
Row input.
Second, inscribed when being started shooting for OLED display, the offset voltage △ V of thin film transistor (TFT) are driven in each sub-pix
It can be shut down the moment to be last, the threshold voltage vt h or system of driving thin film transistor (TFT) prestore in each sub-pix
OLED display drives the threshold voltage vt h of thin film transistor (TFT) when dispatching from the factory in each sub-pix, the present invention is not limited this
It is fixed.
Step S103, a line sub-pix according to detection pixel value shown when, detect driven in the row sub-pix it is thin
The threshold voltage vt h of film transistor, and update next according to the threshold voltage vt h of driving thin film transistor (TFT) in the row sub-pix
The offset voltage △ V of thin film transistor (TFT) are driven in the row sub-pix of this in time interval.
It should be noted that driving the threshold voltage vt h of thin film transistor (TFT) in the above-mentioned detection row sub-pix specifically, such as
Shown in Fig. 2 a and Fig. 2 b, when sub-pix is shown according to detection pixel value Vdate, thin film transistor (TFT) G1 is opened, and detects picture
Element value Vdate is inputted to G1 nodes, is then opened thin film transistor (TFT) G2 and is charged to detection line (Sense Line), charging complete
Afterwards, the voltage of S nodes is detected, according to formula：
Vth=Vg-Vs=V (G1)-V (S)
Wherein V (G) is the voltage of G1 nodes, as detects pixel value Vdate；V (S) is the voltage of S nodes, passes through detection
Obtain, so as to draw the threshold voltage vt h of driving thin film transistor (TFT).
In summary, by setting the detection picture with display frame independence in a time interval, so as to according to reality
The need for border, the display frequency that frame is shown in the time interval is set, and by detecting that a line sub-pix is according to inspection in picture
When survey pixel value is shown, the threshold voltage that thin film transistor (TFT) is driven in the row sub-pix is detected, and according to the row sub-pix
The threshold voltage of middle driving thin film transistor (TFT) updates the benefit for driving thin film transistor (TFT) in next time interval in the row sub-pix
Voltage is repaid, so as to which in the case where not influenceing display frame, the threshold voltage of driving thin film transistor (TFT) is obtained in real time, and is passed through
The data-signal of each sub-pix is compensated to the threshold voltage of each driving thin film transistor (TFT).
In addition, under being updated in above-mentioned steps S103 according to the threshold voltage vt h of driving thin film transistor (TFT) in the row sub-pix
The offset voltage △ V of thin film transistor (TFT) are driven to include in the row sub-pix in one time interval：The relatively more current row sub-pix
The current threshold voltage of middle driving thin film transistor (TFT) and driving thin film transistor (TFT) in the row sub-pix in previous time interval
Previous threshold voltage, specifically as shown in figure 3, above-mentioned steps S103 includes：
Step S1031, a line sub-pix according to detection pixel value shown when, detect driven in the row sub-pix it is thin
The threshold voltage of film transistor.
In step S1032, the relatively current row sub-pix current threshold voltage of driving thin film transistor (TFT) with it is previous when
Between be spaced in the previous threshold voltage of thin film transistor (TFT) is driven in the row sub-pix, in the case, if current threshold voltage with
Previous threshold voltage is differed, then current threshold voltage is updated in next time interval drive film in the row sub-pix
The offset voltage of transistor；If current threshold voltage is identical with previous threshold voltage, previous threshold voltage is updated to next
The offset voltage of thin film transistor (TFT) is driven in individual time interval in the row sub-pix.
On this basis, it is currently preferred in order to reduce influence of the detection picture to the display frame of display frame queue, on
State in step S102, display one detects picture in time interval T, after a pre-position of display frame queue shows that frame is shown
Face includes：Display one detects picture in time interval T, after last display frame of display frame queue is shown.
Further, above-mentioned time interval T is 1s, if specifically, time interval T is too small, it is necessary to frequently in display frame
Insertion detection picture in the queue of picture, due to the detection picture for the detection picture artificially set, the display with actual displayed
Frame picture has certain difference, therefore, in too small time interval insertion detection picture, can to show frame picture entirety
Display effect causes certain harmful effect；When time interval T is excessive, it is impossible to the effective threshold value electricity realized to thin film transistor (TFT)
Vth detection is pressed, so as to can not be compensated in real time to data-signal, and then can not effectively alleviate threshold voltage vt h drift
Shifting causes the problem of OLED display panel display is uneven, therefore invents preferably, and above-mentioned time interval T is 1s.
On this basis, the display frequency of the display frame in the display frame queue to be shown in above-mentioned steps S101 is
In the case that 60 two field pictures in 60Hz, i.e., display frame queue to be shown are completed in 1s time intervals, in step S102
Default display frequency is 61Hz, 119Hz or 120Hz.
Wherein, so that default display frequency is 61Hz as an example, display frequency is the aobvious of 60Hz in display frame queue to be shown
Show that frame is shown in actual display with 61Hz display frequency, so, in display frame queue to be shown
60 two field pictures in 1s time intervals, need 60/61s time to be shown, it is possible in the 1s in actual display
Between show beyond 60 two field pictures in the T of interval time (1-60/61) s show that one detects picture.
61Hz can also be more than certainly for default display frequency, specific default display frequency can showing according to the time
Show that demand is configured, for example, could be arranged to conventional display rate 119Hz or 120Hz, here is omitted for detailed process.
Further, the detection pixel value for above-mentioned detection picture could be arranged to an identical fixed pixel value, example
Such as, all corresponding detection pixel values of detection picture can be disposed as 2V, this is not limited by the present invention.Of course for
Reduce influence of the detection picture to display frame display picture, the detection pixel value of above-mentioned detection picture can also be set to affiliated
Detection picture previous display frame in corresponding each sub-pix pixel value, i.e., detect picture at the time of, display device tie up
The display picture of previous display frame is held, so that smaller on overall picture display effect influence.
Further, the detection pixel value for above-mentioned detection picture is set to the previous display of affiliated detection picture
In frame in the case of the pixel value of corresponding each sub-pix, overall picture display effect is influenceed in order to reduce, can be to inspection
The corresponding data-signal of detection pixel value for surveying each sub-pix in picture is electric in the compensation of current time interval according to the sub-pix
Pressure is compensated, and is shown according to the data-signal after the detection frame compensation.
The embodiment of the present invention also provides a kind of compensation data device of OLED display, and the OLED display includes
Multirow sub-pix, each sub-pix includes driving thin film transistor (TFT), as shown in figure 4, the compensation data device includes：
Data acquisition module 10, the display frame queue to be shown in a time interval T for obtaining OLED display,
The display frame queue is made up of display frame.
Memory module 20, for being stored to the offset voltage △ V that thin film transistor (TFT) is driven in each sub-pix.
Data conversion module 30, for the pre-position insertion of the display frame queue obtained in data acquisition module 10
One detection picture, the detection picture includes the detection pixel value of at least a line sub-pix.
Compensating module 40, is used in above-mentioned time interval T memory storages for the data-signal to each sub-pix in display frame
The offset voltage △ V of thin film transistor (TFT) are driven to compensate in each sub-pix stored in module 20, offset voltage △ V are Asia
The threshold voltage vt h of driving thin film transistor (TFT) in pixel.
Display module 50, in above-mentioned time interval, according to compensating module 40 to the number after each display frame compensation
It is believed that number, show each display frame in frame queue successively with default display frequency, and inspection is shown in above-mentioned time interval T
Survey picture.
Detecting module 60, for when a line sub-pix is shown according to detection pixel value by display module 50, examining
Survey in the row sub-pix drive thin film transistor (TFT) threshold voltage vt h, and using the threshold voltage as offset voltage △ V store to
In memory module 20.
Update module 70, the threshold value for driving thin film transistor (TFT) in the row sub-pix that is detected according to detecting module 60
Voltage updates the offset voltage △ V for driving thin film transistor (TFT) in next time interval T in the row sub-pix.
The compensation data device of above-mentioned OLED display, using compensation data method as described above, with it is foregoing
The identical beneficial effect of compensation data method that embodiment is provided.Due to the beneficial effect of previous embodiment to data compensation method
Fruit is described in detail, and here is omitted.
On this basis, as shown in figure 4, above-mentioned update module 70 includes memory cell 701 and comparing unit 702.
Wherein, said memory cells 701, for driving film in the row sub-pix to being detected by detecting module 60
The threshold voltage vt h of transistor is stored；Above-mentioned comparing unit 702, between the current time that stores memory cell 701
The current threshold voltage of thin film transistor (TFT) is driven in the row sub-pix in being driven in the row sub-pix in previous time interval T
The previous threshold voltage of dynamic thin film transistor (TFT) is compared, ought if current threshold voltage is differed with previous threshold voltage
Preceding threshold voltage is updated to drive the offset voltage △ V of thin film transistor (TFT), storage in the row sub-pix in next time interval T
Into memory module 20；If current threshold voltage is identical with the previous threshold voltages of T, previous threshold voltage is updated to next
The offset voltage △ V of thin film transistor (TFT) are driven in time interval T in the row sub-pix, are stored into memory module 20.
Further, the corresponding data of detection pixel value for detecting each sub-pix in picture are believed by T compensating modules 40
Offset voltage number according to the sub-pix in current time interval T is compensated, and according to the data after the detection frame compensation
Signal is shown by T display modules 50.
It should be noted that each module in the present embodiment can be the processor being separately provided, or be integrated in
Realized in some processor of the compensation data device, compensation data device can also be stored in the form of program code
In memory, called by some processor of compensation data device and perform the function of above unit.Described here
Processor can be a central processing unit (English full name：Central Processing Unit, English abbreviation：CPU) or
It is specific integrated circuit (English full name：Application Specific Integrated Circuit, English abbreviation：
ASIC), or be arranged to implement the embodiment of the present invention one or more integrated circuits.
The embodiment of the present invention also provides a kind of OLED display, including foregoing compensation data device, with it is foregoing
The identical beneficial effect of compensation data device for the OLED display that embodiment is provided.Because previous embodiment is mended to data
The beneficial effect for repaying device is described in detail, and here is omitted.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (11)
1. a kind of compensation data method of OLED display, the OLED display includes multirow sub-pix, each described
Sub-pix includes driving thin film transistor (TFT), it is characterised in that the compensation data method includes：
OLED display display frame queue to be shown in a time interval is obtained, the display frame queue is by showing
Frame is constituted；
It is brilliant using driving film in each sub-pix in the time interval to the data-signal of each sub-pix in the display frame
The offset voltage of body pipe is compensated, and the offset voltage is the threshold voltage for driving thin film transistor (TFT) in the sub-pix,
In the time interval, according to the data-signal after each described display frame compensation, to be shown successively with default display frequency
Show each display frame in the display frame queue, and in the time interval, in a precalculated position of the display frame queue
Place shows that frame shows that one detects picture after showing, the detection picture includes the detection pixel value of at least a line sub-pix；
When a line sub-pix is shown according to the detection pixel value, detect and thin film transistor (TFT) is driven in the row sub-pix
Threshold voltage, and it is sub- according to the row in the next time interval of threshold voltage renewal that thin film transistor (TFT) is driven in the row sub-pix
The offset voltage of thin film transistor (TFT) is driven in pixel.
2. compensation data method according to claim 1, it is characterised in that described to drive film according in the row sub-pix
The offset voltage that the threshold voltage of transistor updates driving thin film transistor (TFT) in the row sub-pix in next time interval includes：
The current threshold voltage and the row in previous time interval of driving thin film transistor (TFT) are sub- in the relatively more current row sub-pix
The previous threshold voltage of thin film transistor (TFT) is driven in pixel；
If the current threshold voltage is differed with the previous threshold voltage, the current threshold voltage is updated to next
The offset voltage of thin film transistor (TFT) is driven in individual time interval in the row sub-pix；
If the current threshold voltage is identical with the previous threshold voltage, the previous threshold voltage is updated to next
The offset voltage of thin film transistor (TFT) is driven in the row sub-pix of this in time interval.
3. compensation data method according to claim 1, it is characterised in that described in the time interval, in described
One pre-position of display frame queue shows that frame shows that one detects that picture includes after showing：
Display one detects picture in the time interval, after last display frame of the display frame queue is shown.
4. compensation data method according to claim 1, it is characterised in that the time interval is 1s.
5. compensation data method according to claim 4, it is characterised in that in the display frame queue to be shown
In the case of showing that the display frequency of frame is 60Hz, the default display frequency is 61Hz, 119Hz or 120Hz.
6. the compensation data method according to claim any one of 1-5, it is characterised in that all detection pixel values are
One identical fixed pixel value；
Or, corresponding each sub- picture in the previous display frame of detection picture of the detection pixel value belonging to the detection pixel value
The pixel value of element.
7. compensation data method according to claim 6, it is characterised in that described in the time interval, in described
One pre-position of display frame queue shows that frame shows that one detects that picture includes after showing：
By the corresponding data-signal of detection pixel value of each sub-pix in detection picture according to the sub-pix in current time interval
Offset voltage compensate, and shown according to the data-signal after the detection frame compensation.
8. a kind of compensation data device of OLED display, the OLED display includes multirow sub-pix, each described
Sub-pix includes driving thin film transistor (TFT), it is characterised in that the compensation data device includes：
Data acquisition module, the display frame queue to be shown in a time interval for obtaining the OLED display, institute
Display frame queue is stated to be made up of display frame；
Memory module, for being stored to the offset voltage that thin film transistor (TFT) is driven in each sub-pix；
Data conversion module, for the pre-position insertion of the display frame queue obtained in the data acquisition module
One detection picture, the detection picture includes the detection pixel value of at least a line sub-pix；
Compensating module, the storage in the time interval is used for the data-signal to each sub-pix in the display frame
The offset voltage of thin film transistor (TFT) is driven to compensate in each sub-pix stored in module, the offset voltage is the sub- picture
The threshold voltage of driving thin film transistor (TFT) in element；
Display module, in the time interval, according to the compensating module to showing the number after frame compensation each described
It is believed that number, each display frame shown in frame queue is shown successively to preset display frequency, and is shown in the time interval
Show the detection picture；
Detecting module, for when a line sub-pix is shown according to the detection pixel value by the display module, examining
Survey in the row sub-pix and drive the threshold voltage of thin film transistor (TFT), and stored the threshold voltage as offset voltage to storage mould
Block；
Update module, the threshold voltage for driving thin film transistor (TFT) in the row sub-pix that is detected according to the detecting module
Update the offset voltage for driving thin film transistor (TFT) in next time interval in the row sub-pix.
9. compensation data device according to claim 8, it is characterised in that the update module includes memory cell and ratio
Compared with unit；
The memory cell, the threshold for driving thin film transistor (TFT) in the row sub-pix to being detected by the detecting module
Threshold voltage is stored；
The comparing unit, it is brilliant for driving film in the row sub-pix in the current time interval that stores the memory cell
The current threshold voltage of body pipe and the previous threshold voltage that thin film transistor (TFT) is driven in the row sub-pix in previous time interval
It is compared；
If the current threshold voltage is differed with the previous threshold voltage, the current threshold voltage is updated to next
The offset voltage of thin film transistor (TFT) is driven in individual time interval in the row sub-pix；
If the current threshold voltage is identical with the previous threshold voltage, the previous threshold voltage is updated to next
The offset voltage of thin film transistor (TFT) is driven in the row sub-pix of this in time interval.
10. compensation data device according to claim 8 or claim 9, it is characterised in that picture will be detected by the compensating module
Offset voltage of the corresponding data-signal of detection pixel value of each sub-pix according to the sub-pix in current time interval is entered in face
Row compensation, and shown according to the data-signal after the detection frame compensation by the display module.
11. a kind of OLED display, it is characterised in that including the compensation data device described in claim any one of 8-10.
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| CN107068053B (en) | 2019-07-09 |
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