CN109036268A - The compensation system and compensation method of OLED display - Google Patents
The compensation system and compensation method of OLED display Download PDFInfo
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- CN109036268A CN109036268A CN201810786724.1A CN201810786724A CN109036268A CN 109036268 A CN109036268 A CN 109036268A CN 201810786724 A CN201810786724 A CN 201810786724A CN 109036268 A CN109036268 A CN 109036268A
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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]
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Abstract
The present invention provides the compensation system and compensation method of a kind of OLED display.The compensation system of the OLED display is in threshold voltage reconnaissance phase, storage control module, which reads initial threshold voltage and is transmitted to threshold voltage, obtains module, threshold voltage obtains the threshold voltage of the driving thin film transistor (TFT) of module detecting pixel-driving circuit and subtracts each other with initial threshold voltage, it obtains threshold voltage variation value and stores into the first memory module, in data write phase, storage control module access initial data signal simultaneously obtains corresponding brightness, corresponding optical compensation data voltage is obtained from look-up table, and the read threshold voltages changing value from the first memory module, offset data signal is exported after optical compensation data voltage is superimposed with threshold voltage variation value to source electrode driver, source electrode driver generates offset data voltage and exports to pixel-driving circuit, optics and electric compensation are realized simultaneously, compensation Effect is good, and show uniformity is effectively promoted.
Description
Technical field
The present invention relates to field of display technology more particularly to the compensation systems and compensation method of a kind of OLED display.
Background technique
Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display device, it is also referred to as organic
El display device is a kind of emerging panel display apparatus, due to its simple with preparation process, at low cost, power consumption
It is low, light emission luminance is high, operating temperature wide adaptation range, volume are frivolous, fast response time, and be easily achieved colored display and big
Screen shows, is easily achieved and matches with driver ic, is easily achieved the advantages that Flexible Displays, thus has wide
Application prospect.
OLED is generally included: substrate, the anode on substrate, hole injection layer (the Hole Inject on anode
Layer, HIL), the hole transmission layer (Hole Transport Layer, HTL) on hole injection layer, be set to hole pass
Luminescent layer on defeated layer, is set to electricity at the electron transfer layer on luminescent layer (Electron Transport Layer, ETL)
Electron injecting layer (Electron Inject Layer, EIL) in sub- transport layer and the cathode on electron injecting layer.
The principle of luminosity of OLED display device is semiconductor material and luminous organic material under electric field driven, by carrier injection and
Composite guide photoluminescence.Specifically, OLED display device generallys use tin indium oxide (ITO) pixel electrode and metal electrode is made respectively
For the anode and cathode of device, under certain voltage driving, electrons and holes are injected into electron-transport from cathode and anode respectively
Layer and hole transmission layer, electrons and holes pass through electron transfer layer respectively and hole transmission layer moves to luminescent layer, and are shining
It meets in layer, form exciton and excites light emitting molecule, the latter issues visible light by radiative relaxation.
In the prior art, each pixel of OLED display includes pixel-driving circuit, referring to Fig. 1, existing
Pixel-driving circuit includes first film transistor (TFT) T10, the second thin film transistor (TFT) T20, capacitor C10 and organic light emission two
Pole pipe D10.Wherein, the first film transistor T10 is switching thin-film transistor, and grid accesses scanning signal Scan, source
Pole incoming data signal voltage Vdata, drain electrode are electrically connected the grid of the second thin film transistor (TFT) T20, second film crystal
Pipe T20 is driving thin film transistor (TFT), drain electrode access power supply positive voltage VDD, source electrode electric connection first node S, the capacitor
The grid and source electrode of the second thin film transistor (TFT) T20, the sun of the Organic Light Emitting Diode D10 is electrically connected in the both ends of C10
Pole is electrically connected first node S, and cathode accesses power supply negative voltage VSS.Voltage data signal Vdata by OLED display source
Driver provides.The working sequence of the pixel-driving circuit includes data write phase and driving light emitting phase, in data
In write phase, scanning signal Scan controls first film transistor T10 conducting, and voltage data signal Vdata write-in second is thin
The grid of film transistor T20, in driving light emitting phase, scanning signal Scan controls first film transistor T10 cut-off, due to electricity
Hold the memory action of C10, the second thin film transistor (TFT) T20 conducting, Organic Light Emitting Diode D10 shines.In the prior art, cause
The non-uniform reason that OLED display is shown mainly has two o'clock: first, the driving thin film transistor (TFT) in pixel-driving circuit
Threshold voltage shift can seriously affect the electric current for flowing through OLED device, shown unevenly so as to cause display device；Second, not
Luminescent layer processing procedure with the OLED device in pixel has differences display device is also caused to show unevenly.Referring to Fig. 2, existing
A kind of OLED display compensation system include detecting voltage module 100, with detecting voltage module 100 be electrically connected detect
Survey control module 200, the first static memory 310 and the second static memory 320 are electrically connected with detecting control module 200,
The storage control module 400 and storage being electrically connected with the first static memory 310 and the second static memory 320 control
The flash memory control module 600 and dodge that the dynamic memory 500 and dynamic memory 500 that module 400 is electrically connected are electrically connected
The data mapping module 800 depositing the flash memory 700 of the electric connection of control module 600 and being electrically connected with storage control module 400.
The detecting voltage module 100 is electrically connected the first node S in pixel-driving circuit shown in FIG. 1,800 electricity of data mapping module
Property connection OLED display source electrode driver 900.When work, before entering data write phase, it is introduced into a threshold value
In the detecting voltage stage, in threshold voltage reconnaissance phase, scanning signal Scan controls first film transistor T10 conducting, source electrode
It is thin that driver 900 is provided as first film transistor T10 write-in second of the voltage data signal Vdata of reference voltage through being connected
The grid of film transistor T20, detecting control module 200 control detecting voltage module 100 detect the second thin film transistor (TFT) T20 namely
The source voltage of thin film transistor (TFT) is driven, and by detecting control module 200 according to reference voltage and the second thin film transistor (TFT) T20
Source voltage generates corresponding second thin film transistor (TFT) T20 namely drives the threshold voltage of thin film transistor (TFT), then utilizes first
Static memory 310 and the second static memory 320 carry out ping-pong operation, and the second thin film transistor (TFT) T20 namely driving film is brilliant
The threshold voltage of body pipe is transmitted to storage control module 400, by storage control module 400 by the second thin film transistor (TFT) T20 namely
The threshold voltage of driving thin film transistor (TFT) is stored into dynamic memory 500, in data write phase, storage control module 400
Access initial data signal generate initial data voltage, and read the second thin film transistor (TFT) T20 in dynamic memory 500 namely
The threshold voltage and initial data voltage for driving thin film transistor (TFT) are overlapped to obtain offset data signal, then by offset data
Signal is transmitted to data mapping module 800, by data mapping module 800 to offset data signal export after mapping processing to
The source electrode driver 900 of OLED display, source electrode driver 900 generate corresponding offset data voltage as data-signal electricity
It presses first film transistor T10 of the Vdata through being connected that the grid of the second thin film transistor (TFT) T20 is written, realizes brilliant to driving film
The compensation of the threshold voltage shift of body pipe, before shutdown, flash memory control module 600 is thin by the driving stored in dynamic memory 500
Film transistor threshold voltage is into storing into flash memory 700.The design be merely capable of to driving thin film transistor (TFT) threshold voltage into
Row compensation, but it is uneven to compensate display caused by OLED device luminescent layer processing procedure has differences.
Summary of the invention
The purpose of the present invention is to provide a kind of compensation systems of OLED display, can carry out to OLED display
Compensation promotes show uniformity.
Another object of the present invention is to provide a kind of compensation methodes of OLED display, can be to OLED display
It compensates, promotes show uniformity.
To achieve the above object, present invention firstly provides a kind of compensation system of OLED display, the OLED is shown
Device includes multiple pixel-driving circuits and the source electrode driver with the electric connection of multiple pixel-driving circuits, each pixel driver
Circuit includes driving thin film transistor (TFT)；The compensation system of the OLED display includes that threshold voltage obtains module and threshold
The first memory module that threshold voltage obtains the storage control module that module is electrically connected and is electrically connected with storage control module；Institute
It states threshold voltage and obtains module electric connection pixel-driving circuit；The storage control module is electrically connected source electrode driver；
First memory module is stored with preset initial threshold voltage and preset brightness and optical compensation data electricity
The look-up table of the corresponding relationship of pressure；
In threshold voltage reconnaissance phase, the storage control module reads the initial threshold voltage in the first memory module simultaneously
It is transmitted to threshold voltage and obtains module；The threshold voltage obtains the driving thin film transistor (TFT) of module detecting pixel-driving circuit
Threshold voltage simultaneously subtracts each other with initial threshold voltage, obtain threshold voltage variation value and is transmitted to storage control module；Storage control
Module stores the threshold voltage variation value into the first memory module；
In data write phase, the storage control module accesses initial data signal and obtains initial data signal and corresponds to
Brightness, according to the corresponding brightness of initial data signal from pair of brightness and optical compensation data voltage in the first memory module
Corresponding optical compensation data voltage is obtained in the look-up table that should be related to, then read threshold voltages become from the first memory module
Change value will export corresponding offset data signal to source electrode after the optical compensation data voltage and the superposition of threshold voltage variation value
Driver, source electrode driver generate corresponding offset data voltage and export to pixel-driving circuit.
The pixel-driving circuit includes first film transistor, the second thin film transistor (TFT), capacitor and organic light-emitting diodes
Pipe；The grid of the first film transistor accesses scanning signal, and source electrode is electrically connected source electrode driver, and drain electrode is electrically connected the
The grid of two thin film transistor (TFT)s, the drain electrode of second thin film transistor (TFT) access power supply positive voltage, and source electrode is electrically connected organic hair
The anode of optical diode；The grid and source electrode of the second thin film transistor (TFT) is electrically connected in the both ends of the capacitor；It is described organic
The cathode of light emitting diode accesses power supply negative voltage；The threshold voltage obtains the source that module is electrically connected the second thin film transistor (TFT)
Pole；
In threshold voltage reconnaissance phase, the scanning signal control first film transistor conducting, the source electrode driver
Preset reference voltage is written to the grid of the second thin film transistor (TFT) in first film transistor through being connected, and the threshold voltage obtains
Modulus block detects the source voltage of the second thin film transistor (TFT), according to the source voltage of the second thin film transistor (TFT) and preset reference
Voltage obtains the threshold voltage of the second thin film transistor (TFT)；
In data write phase, the scanning signal control first film transistor conducting, source electrode driver will be corresponding
The grid of the second thin film transistor (TFT) is written in first film transistor of the offset data voltage through being connected；
In driving light emitting phase, the scanning signal control first film transistor cut-off.
The threshold voltage obtains the detecting control that module includes detecting voltage module and is electrically connected with detecting voltage module
Molding block；The detecting control module is electrically connected the storage control module；The detecting voltage module is electrically connected second
The source electrode of thin film transistor (TFT)；
In threshold voltage reconnaissance phase, the storage control module reads the initial threshold voltage in the first memory module simultaneously
It is transmitted to detecting control module；The detecting control module controls the source that the detecting voltage module detects the second thin film transistor (TFT)
Pole tension is simultaneously transmitted to detecting control module, and the detecting control module is according to the source voltage of the second thin film transistor (TFT) and pre-
If reference voltage obtain the second thin film transistor (TFT) threshold voltage and subtract each other with initial threshold voltage, obtain threshold voltage variation
It is worth and is transmitted to storage control module.
The compensation system of the OLED display further includes electric with threshold voltage acquisition module and storage control module
Property the first transmission module of connection and obtain the second transmission mould that module and storage control module are electrically connected with threshold voltage
Block；
In threshold voltage reconnaissance phase, the storage control module is transmitted initial threshold voltage by the second transmission module
Module is obtained to threshold voltage；The threshold voltage obtains module and is transmitted to threshold voltage variation value by the first transmission module
Storage control module.
First transmission module includes the second memory module and third memory module；Second memory module and threshold value
Voltage obtains module and storage control module is electrically connected；The third memory module and threshold voltage obtain module and storage
Control module is electrically connected；
Second transmission module includes the 4th memory module and the 5th memory module；4th memory module and threshold value
Voltage obtains module and storage control module is electrically connected；5th memory module and threshold voltage obtain module and storage
Control module is electrically connected；
In threshold voltage reconnaissance phase, the storage control module is carried out using the 4th memory module and the 5th memory module
Initial threshold voltage is transmitted to threshold voltage and obtains module by ping-pong operation；The threshold voltage obtains module using the second storage
Module and third memory module carry out ping-pong operation and threshold voltage variation value are transmitted to storage control module.
First memory module is third generation Double Data Rate synchronous DRAM；
Second memory module, third memory module, the 4th memory module and the 5th memory module are static random
Access memory.
The compensation system of the OLED display further include be electrically connected the first memory module flash memory control module with
And the flash memory module being electrically connected with flash memory control module；
In shut-down-phase, the flash memory control module reads the threshold voltage variation value in the first memory module and is stored in
In flash memory module.
The compensation system of the OLED display further includes the data mapping module being electrically connected with storage control module；
The source electrode driver is electrically connected through data mapping module and storage control module；
In data write phase, the storage control module is by the optical compensation data voltage and threshold voltage variation value
Corresponding offset data signal is exported after superposition to data mapping module, the data mapping module carries out offset data signal
It is transmitted in source electrode driver after mapping processing.
First memory module includes mutually independent first storage region, the second storage region and third memory block
Domain；First storage region is used for storing initial threshold voltage；Second storage region is mended for storing brightness and optics
Repay the look-up table of the corresponding relationship of data voltage；The third storage region is for storing threshold voltage variation value.
The present invention also provides a kind of compensation methodes of OLED display, the compensation system applied to above-mentioned OLED display
System, includes the following steps:
Step S1, into threshold voltage reconnaissance phase；
The storage control module reads the initial threshold voltage in the first memory module and is transmitted to threshold voltage acquisition
Module；The threshold voltage obtain the threshold voltage of the driving thin film transistor (TFT) of module detecting pixel-driving circuit and with initial threshold
Threshold voltage subtracts each other, and obtains threshold voltage variation value and is transmitted to storage control module；Storage control module is by the threshold voltage
Changing value is stored into the first memory module；
Step S2, into data write phase；
The storage control module accesses initial data signal and obtains the corresponding brightness of initial data signal, according to initial
Look-up table of the corresponding brightness of data-signal from the corresponding relationship of brightness and optical compensation data voltage in the first memory module
It is middle to obtain corresponding optical compensation data voltage, the then read threshold voltages changing value from the first memory module, by the light
Corresponding offset data signal is exported to source electrode driver after learning offset data voltage and the superposition of threshold voltage variation value, and source electrode drives
Dynamic device generates corresponding offset data voltage and exports to pixel-driving circuit.
Beneficial effects of the present invention: the compensation system of OLED display of the invention include threshold voltage obtain module,
Storage control module and the first memory module.In threshold voltage reconnaissance phase, storage control module is read in the first memory module
Initial threshold voltage and be transmitted to threshold voltage obtain module, threshold voltage obtain module detecting pixel-driving circuit driving
The threshold voltage of thin film transistor (TFT) simultaneously subtracts each other with initial threshold voltage, obtain threshold voltage variation value and is deposited by storage control module
Storage is into the first memory module, and in data write phase, storage control module access initial data signal is simultaneously obtained corresponding bright
Degree, obtains corresponding optical compensation data voltage, and the read threshold voltages changing value from the first memory module from look-up table,
Offset data signal is exported after optical compensation data voltage is superimposed with threshold voltage variation value to source electrode driver, source drive
Device generates offset data voltage and exports to pixel-driving circuit, while realizing optics and electric compensation, and compensation effect is good, has
Improve show uniformity to effect.The compensation method of OLED display of the invention can mend OLED display
It repays, promotes show uniformity.
Detailed description of the invention
For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed
Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.
In attached drawing,
Fig. 1 is a kind of existing circuit diagram of the pixel-driving circuit of OLED display；
Fig. 2 is a kind of existing structural schematic diagram of the compensation system of OLED display；
Fig. 3 is the structural schematic diagram of the compensation system of OLED display of the invention；
Fig. 4 is the pixel-driving circuit that one preferred embodiment of compensation system of OLED display of the invention is electrically connected
Circuit diagram；
Fig. 5 is the structural schematic diagram of the first memory module of the compensation system of OLED display of the invention；
Fig. 6 is the flow chart of the compensation method of OLED display of the invention.
Specific embodiment
Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention
Example and its attached drawing are described in detail.
Referring to Fig. 3, the present invention provides a kind of compensation system of OLED display.The OLED display includes more
A pixel-driving circuit 90 and the source electrode driver 80 being electrically connected with multiple pixel-driving circuits 90.Each pixel-driving circuit
90 include driving thin film transistor (TFT).The compensation system of OLED display of the invention include threshold voltage obtain module 10,
The storage control module 20 that module 10 is electrically connected and be electrically connected with storage control module 20 first is obtained with threshold voltage
Memory module 30.The threshold voltage obtains module 10 and is electrically connected pixel-driving circuit 90.20 electricity of storage control module
Property connection source electrode driver 80.
First memory module 30 is stored with preset initial threshold voltage and preset brightness and optical compensation data
The look-up table of the corresponding relationship of voltage.
In threshold voltage reconnaissance phase, the storage control module 20 reads the initial threshold electricity in the first memory module 30
It presses and is transmitted to threshold voltage and obtain module 10.The driving that the threshold voltage obtains the detecting pixel-driving circuit 90 of module 10 is thin
The threshold voltage of film transistor simultaneously subtracts each other with initial threshold voltage, obtain threshold voltage variation value and is transmitted to storage control module
20.Storage control module 20 stores the threshold voltage variation value into the first memory module 30.
In data write phase, the storage control module 20 accesses initial data signal and obtains initial data signal pair
The brightness answered, according to the corresponding brightness of initial data signal from the first memory module 30 brightness and optical compensation data voltage
Corresponding relationship look-up table in obtain corresponding optical compensation data voltage, the then read threshold from the first memory module 30
Voltage change will export corresponding offset data signal after the optical compensation data voltage and the superposition of threshold voltage variation value
To source electrode driver 80, source electrode driver 80 generates corresponding offset data voltage and exports to pixel-driving circuit 90.
Specifically, referring to Fig. 4, in the preferred embodiment of the present invention, the pixel-driving circuit 90 is 2T1C knot
The pixel-driving circuit of structure, including first film transistor T1, the second thin film transistor (TFT) T2, capacitor C1 and Organic Light Emitting Diode
D1.The first film transistor T1 is switching thin-film transistor, and grid accesses scanning signal Scan, and source electrode is electrically connected source
Driver 80, drain electrode are electrically connected the grid of the second thin film transistor (TFT) T2.The second thin film transistor (TFT) T2 is driving film
Transistor, drain electrode access power supply positive voltage VDD, source electrode are electrically connected the anode of organic light emitting diode D1.The capacitor C1
Both ends the grid and source electrode of the second thin film transistor (TFT) T2 is electrically connected.The cathode of the Organic Light Emitting Diode D1 accesses
Power supply negative voltage VSS.The threshold voltage obtains the source electrode that module 10 is electrically connected the second thin film transistor (TFT) T2.
In threshold voltage reconnaissance phase, the scanning signal Scan control first film transistor T1 conducting, the source electrode
Preset reference voltage, institute is written to the grid of the second thin film transistor (TFT) T2 in first film transistor T1 of the driver 80 through being connected
It states threshold voltage and obtains the source voltage that module 10 detects the second thin film transistor (TFT) T2, according to the source electrode of the second thin film transistor (TFT) T2
Voltage and preset reference voltage obtain the threshold voltage of the second thin film transistor (TFT) T20.
In data write phase, the scanning signal Scan control first film transistor T1 conducting, source electrode driver 80
The grid of the second thin film transistor (TFT) T2 is written in first film transistor T1 by corresponding offset data voltage through being connected.
In driving light emitting phase, the scanning signal Scan control first film transistor T1 cut-off, due to capacitor C10's
Memory action, the second thin film transistor (TFT) T2 conducting, and the grid voltage of the second thin film transistor (TFT) T2 is offset data voltage, therefore
Optics and electric compensation are realized simultaneously, and Organic Light Emitting Diode D1 shines.
Specifically, referring to Fig. 3, it includes detecting voltage module 11 and and detecting voltage that the threshold voltage, which obtains module 10,
The detecting control module 12 that module 11 is electrically connected.The detecting control module 12 is electrically connected the storage control module 20.
The detecting voltage module 11 is electrically connected the source electrode of the second thin film transistor (TFT) T2.In threshold voltage reconnaissance phase, the storage
Control module 20 reads the initial threshold voltage in the first memory module 30 and is transmitted to detecting control module 12.The detecting control
Molding block 12 controls the detecting voltage module 11 and detects the source voltage of the second thin film transistor (TFT) T2 and be transmitted to detecting control
Module 12, the detecting control module 12 are obtained according to the source voltage of the second thin film transistor (TFT) T2 and preset reference voltage
The threshold voltage of second thin film transistor (TFT) T2 simultaneously subtracts each other with initial threshold voltage, obtain threshold voltage variation value and is transmitted to storage
Control module 20.
Specifically, referring to Fig. 3, the compensation system of the OLED display further includes obtaining module 10 with threshold voltage
And storage control module 20 is electrically connected the first transmission module 41 and obtains module 10 and storage control mould with threshold voltage
The second transmission module 42 that block 20 is electrically connected.In threshold voltage reconnaissance phase, the storage control module 20 passes through second
Initial threshold voltage is transmitted to threshold voltage and obtains module 10 by transmission module 42.The threshold voltage obtains module 10 by the
Threshold voltage variation value is transmitted to storage control module 20 by one transmission module 41.
Further, referring to Fig. 3, first transmission module 41 includes that the second memory module 411 and third store mould
Block 412.Second memory module 411 obtains the detecting control module 12 and storage control module 20 of module 10 with threshold voltage
It is electrically connected.The third memory module 412 obtains the detecting control module 12 of module 10 with threshold voltage and storage controls
Module 20 is electrically connected.Second transmission module 42 includes the 4th memory module 421 and the 5th memory module 422.It is described
4th memory module 421 obtains the detecting control module 12 of module 10 with threshold voltage and storage control module 20 electrically connects
It connects.The detecting control module 12 and storage control module 20 that 5th memory module 422 obtains module 10 with threshold voltage are
It is electrically connected.In threshold voltage reconnaissance phase, the storage control module 20 utilizes the 4th memory module 421 and the 5th storage mould
Block 422 carries out ping-pong operation and initial threshold voltage is transmitted to threshold voltage acquisition module 10.The threshold voltage obtains module
10, which carry out ping-pong operation using the second memory module 411 and third memory module 412, is transmitted to storage for threshold voltage variation value
Control module 20.
Preferably, first memory module 30 is third generation Double Data Rate synchronous DRAM (DDR3).
Preferably, second memory module 411, third memory module 412, the 4th memory module 421 and the 5th storage
Module 422 is static random access memory (SRAM).
Specifically, referring to Fig. 3, the compensation system of the OLED display further includes being electrically connected the first memory module
30 flash memory control module 50 and the flash memory module 60 being electrically connected with flash memory control module 50.In shut-down-phase, the sudden strain of a muscle
It deposits control module 50 to read the threshold voltage variation value in the first memory module 30 and be stored in flash memory module 60, in order under
It is used when secondary booting.
Specifically, referring to Fig. 3, the compensation system of the OLED display further includes electrical with storage control module 20
The data mapping module 70 of connection.The source electrode driver 80 electrically connects through data mapping module 70 with storage control module 20
It connects.In data write phase, the storage control module 20 folds the optical compensation data voltage with threshold voltage variation value
Corresponding offset data signal is exported after adding to data mapping module 70, the data mapping module 70 to offset data signal into
It is transmitted in source electrode driver 80 after row mapping processing.
Specifically, referring to Fig. 5, first memory module 30 includes mutually independent first storage region 31, second
Storage region 32 and third storage region 33.First storage region 31 is used for storing initial threshold voltage.Described second deposits
Storage area domain 32 is used to store the look-up table of the corresponding relationship of brightness and optical compensation data voltage.The third storage region 33 is used
In storage threshold voltage variation value.
Specifically, the detecting control module 12, the second memory module 411, third memory module 412, storage control mould
Block 20, the 4th memory module 421, the 5th memory module 422, data mapping module 70 and flash memory control module 50 are arranged at together
On one field programmable gate array (FPGA) chip.
It should be noted that the compensation system of OLED display of the invention in threshold voltage reconnaissance phase, stores
Control module 20, which reads the initial threshold voltage in the first memory module 30 and is transmitted to threshold voltage, obtains module 10, threshold value electricity
Pressure obtains the threshold voltage of the driving thin film transistor (TFT) of the detecting pixel-driving circuit 90 of module 10 and subtracts each other with initial threshold voltage,
It obtains threshold voltage variation value and is stored by storage control module 20 into the first memory module 30, in data write phase, deposited
Storage control module 20 accesses initial data signal and obtains corresponding brightness, and corresponding optical compensation data are obtained from look-up table
Voltage can show uneven progress effective compensation caused by the otherness OLED device luminescent layer to realize optical compensation,
Also, the read threshold voltages changing value also from the first memory module 30 of storage control module 20, by optical compensation data voltage
Offset data signal is exported after being superimposed with threshold voltage variation value to source electrode driver 80, source electrode driver 80 generates offset data
Voltage is simultaneously exported to pixel-driving circuit 90, to realize electric compensation, can be floated to the threshold voltage of driving thin film transistor (TFT)
Display caused by shifting is uneven to carry out effective compensation, so that whole compensation effect is promoted, show uniformity is effectively promoted.
In addition, the compensation system of OLED display of the invention is mended in addition to can be achieved at the same time electric compensation and optics
It repays, can also realize the pure electric compensation of the prior art, when carrying out pure electric compensation, in threshold voltage reconnaissance phase, institute
It states the threshold voltage of the driving thin film transistor (TFT) of the threshold voltage acquisition detecting pixel-driving circuit 90 of module 10 and is directly transferred to
Storage control module 20.Storage control module 20 directly deposits the threshold voltage of the driving thin film transistor (TFT) of pixel-driving circuit 90
Storage is into the first memory module 30.Accordingly, in data write phase, the storage control module 20 accesses initial data signal
Corresponding initial data voltage is generated, drives the threshold voltage of thin film transistor (TFT) to primary data using pixel-driving circuit 90
Voltage carries out electric compensation and obtains offset data voltage and export corresponding offset data signal.And in shut-down-phase, flash memory control
Molding block 50 reads the threshold voltage of the driving thin film transistor (TFT) of the pixel-driving circuit 90 in the first memory module 30 and storage
In flash memory module 60.
Referring to Fig. 6, based on the same inventive concept, the present invention also provides a kind of compensation methodes of OLED display, answer
For the compensation system of OLED display shown in Fig. 3, no longer the structure of the compensation system of OLED display is done herein
Repeatability description.The compensation method of the OLED display includes the following steps:
Step S1, into threshold voltage reconnaissance phase.
The storage control module 20 reads the initial threshold voltage in the first memory module 30 and is transmitted to threshold voltage
Obtain module 10.The threshold voltage obtains the threshold voltage that module 10 detects the driving thin film transistor (TFT) of pixel-driving circuit 90
And subtracts each other with initial threshold voltage, obtain threshold voltage variation value and be transmitted to storage control module 20.Storage control module 20
The threshold voltage variation value is stored into the first memory module 30.
Specifically, in Fig. 3 and embodiment shown in Fig. 4, in the step S1, the scanning signal Scan control first
Thin film transistor (TFT) T1 conducting, first film transistor T1 of the source electrode driver 80 through being connected is to the second thin film transistor (TFT) T2's
Preset reference voltage is written in grid, and the threshold voltage obtains the source voltage that module 10 detects the second thin film transistor (TFT) T2,
The threshold value electricity of the second thin film transistor (TFT) T20 is obtained according to the source voltage of the second thin film transistor (TFT) T2 and preset reference voltage
Pressure.
Further, in the step S1, the storage control module 20 reads the initial threshold in the first memory module 30
Threshold voltage is simultaneously transmitted to detecting control module 12.The detecting control module 12 controls the detecting of detecting voltage module 11 second
The source voltage of thin film transistor (TFT) T2 is simultaneously transmitted to detecting control module 12, and the detecting control module 12 is according to the second film crystalline substance
The source voltage of body pipe T2 and preset reference voltage obtain the threshold voltage and and initial threshold of the second thin film transistor (TFT) T2
Voltage subtracts each other, and obtains threshold voltage variation value and is transmitted to storage control module 20.
Specifically, in the step S1, the storage control module 20 is electric by initial threshold by the second transmission module 42
Pressure is transmitted to threshold voltage and obtains module 10.The threshold voltage obtains module 10 and passes through the first transmission module 41 for threshold voltage
Changing value is transmitted to storage control module 20.
Further, in the step S1, the storage control module 20 utilizes the 4th memory module 421 and the 5th storage
Module 422 carries out ping-pong operation and initial threshold voltage is transmitted to threshold voltage acquisition module 10.The threshold voltage obtains mould
Threshold voltage variation value is transmitted to and deposits using the second memory module 411 and the progress ping-pong operation of third memory module 412 by block 10
Store up control module 20.
Step S2, into data write phase.
The storage control module 20 accesses initial data signal and obtains the corresponding brightness of initial data signal, according to first
The corresponding brightness of beginning data-signal is looked into from the corresponding relationship of brightness and optical compensation data voltage in the first memory module 30
It looks in table and obtains corresponding optical compensation data voltage, then the read threshold voltages changing value from the first memory module 30, it will
The optical compensation data voltage exports corresponding offset data signal to source electrode driver after being superimposed with threshold voltage variation value
80, source electrode driver 80 generates corresponding offset data voltage and exports to pixel-driving circuit 90.
Specifically, in Fig. 3 and embodiment shown in Fig. 4, in the step S2, the scanning signal Scan control first
Thin film transistor (TFT) T1 conducting, first film transistor T1 write-in of the source electrode driver 80 by corresponding offset data voltage through being connected
The grid of second thin film transistor (TFT) T2.
Specifically, in the step S2, the storage control module 20 is electric by the optical compensation data voltage and threshold value
Corresponding offset data signal is exported out to data mapping module to data mapping module 70, the data after pressure changing value superposition
Mapping block 70 is transmitted in source electrode driver 80 after carrying out mapping processing to offset data signal.
Specifically, the compensation method of the OLED display further include step S3, into driving light emitting phase.It is described to sweep
Signal Scan control first film transistor T1 cut-off is retouched, due to the memory action of capacitor C10, the second thin film transistor (TFT) T2 is led
It is logical, and the grid voltage of the second thin film transistor (TFT) T2 is offset data voltage, therefore realizes optics and electric compensation simultaneously, is had
Machine light emitting diode D1 shines.
Specifically, the compensation method of the OLED display further includes step S4, into shut-down-phase.The flash memory control
Molding block 50 reads the threshold voltage variation value in the first memory module 30 and is stored in flash memory module 60, in order to which next time opens
It is used when machine.
It should be noted that the compensation method of OLED display of the invention in threshold voltage reconnaissance phase, stores
Control module 20, which reads the initial threshold voltage in the first memory module 30 and is transmitted to threshold voltage, obtains module 10, threshold value electricity
Pressure obtains the threshold voltage of the driving thin film transistor (TFT) of the detecting pixel-driving circuit 90 of module 10 and subtracts each other with initial threshold voltage,
It obtains threshold voltage variation value and is stored by storage control module 20 into the first memory module 30, in data write phase, deposited
Storage control module 20 accesses initial data signal and obtains corresponding brightness, and corresponding optical compensation data are obtained from look-up table
Voltage can show uneven progress effective compensation caused by the otherness OLED device luminescent layer to realize optical compensation,
Also, the read threshold voltages changing value also from the first memory module 30 of storage control module 20, by optical compensation data voltage
Offset data signal is exported after being superimposed with threshold voltage variation value to source electrode driver 80, source electrode driver 80 generates offset data
Voltage is simultaneously exported to pixel-driving circuit 90, to realize electric compensation, can be floated to the threshold voltage of driving thin film transistor (TFT)
Display caused by shifting is uneven to carry out effective compensation, so that whole compensation effect is promoted, show uniformity is effectively promoted.
In addition, the compensation method of OLED display of the invention is mended in addition to can be achieved at the same time electric compensation and optics
It repays, can also realize the pure electric compensation of the prior art, when carrying out pure electric compensation, in threshold voltage reconnaissance phase, institute
It states the threshold voltage of the driving thin film transistor (TFT) of the threshold voltage acquisition detecting pixel-driving circuit 90 of module 10 and is directly transferred to
Storage control module 20.Storage control module 20 directly deposits the threshold voltage of the driving thin film transistor (TFT) of pixel-driving circuit 90
Storage is into the first memory module 30.Accordingly, in data write phase, the storage control module 20 accesses initial data signal
Corresponding initial data voltage is generated, drives the threshold voltage of thin film transistor (TFT) to primary data using pixel-driving circuit 90
Voltage carries out electric compensation and obtains offset data voltage and export corresponding offset data signal.And in shut-down-phase, flash memory control
Molding block 50 reads the threshold voltage of the driving thin film transistor (TFT) of the pixel-driving circuit 90 in the first memory module 30 and storage
In flash memory module 60.
In conclusion the compensation system of OLED display of the invention includes that threshold voltage obtains module, storage control
Module and the first memory module.In threshold voltage reconnaissance phase, storage control module reads the initial threshold in the first memory module
Threshold voltage is simultaneously transmitted to threshold voltage acquisition module, and threshold voltage obtains the driving film crystal of module detecting pixel-driving circuit
The threshold voltage of pipe simultaneously subtracts each other with initial threshold voltage, obtains threshold voltage variation value and is stored by storage control module to first
In memory module, in data write phase, storage control module access initial data signal simultaneously obtains corresponding brightness, from lookup
Corresponding optical compensation data voltage, and the read threshold voltages changing value from the first memory module are obtained in table, and optics is mended
It repays and exports offset data signal after data voltage is superimposed with threshold voltage variation value to source electrode driver, source electrode driver generates benefit
It repays data voltage and exports to pixel-driving circuit, while realizing optics and electric compensation, compensation effect is good, is effectively promoted
Show uniformity.The compensation method of OLED display of the invention can compensate OLED display, be promoted aobvious
Show uniformity.
The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology
Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the claims in the present invention
Protection scope.
Claims (10)
1. a kind of compensation system of OLED display, the OLED display include multiple pixel-driving circuits (90) and with
The source electrode driver (80) that multiple pixel-driving circuits (90) are electrically connected, each pixel-driving circuit (90) include that driving is thin
Film transistor；It is characterised in that it includes threshold voltage obtains module (10), obtains module (10) electric connection with threshold voltage
Storage control module (20) and the first memory module (30) being electrically connected with storage control module (20)；The threshold voltage obtains
Modulus block (10) is electrically connected pixel-driving circuit (90)；The storage control module (20) is electrically connected source electrode driver
(80)；
First memory module (30) is stored with preset initial threshold voltage and preset brightness and optical compensation data electricity
The look-up table of the corresponding relationship of pressure；In threshold voltage reconnaissance phase, the storage control module (20) reads the first memory module
(30) initial threshold voltage in is simultaneously transmitted to threshold voltage and obtains module (10)；The threshold voltage obtains module (10) detecting
The threshold voltage of the driving thin film transistor (TFT) of pixel-driving circuit (90) simultaneously subtracts each other with initial threshold voltage, obtains threshold voltage change
Change value is simultaneously transmitted to storage control module (20)；The threshold voltage variation value is stored to first and is deposited by storage control module (20)
It stores up in module (30)；
In data write phase, the storage control module (20) accesses initial data signal and obtains initial data signal and corresponds to
Brightness, according to the corresponding brightness of initial data signal from the first memory module (30) brightness and optical compensation data voltage
Corresponding relationship look-up table in obtain corresponding optical compensation data voltage, threshold is then read from the first memory module (30)
Threshold voltage changing value is believed corresponding offset data is exported after the optical compensation data voltage and the superposition of threshold voltage variation value
Number to source electrode driver (80), source electrode driver (80) generates corresponding offset data voltage and simultaneously exports to pixel-driving circuit
(90)。
2. the compensation system of OLED display as described in claim 1, which is characterized in that the pixel-driving circuit (90)
Including first film transistor (T1), the second thin film transistor (TFT) (T2), capacitor (C1) and Organic Light Emitting Diode (D1)；Described
The grid of one thin film transistor (TFT) (T1) accesses scanning signal (Scan), and source electrode is electrically connected source electrode driver (80), and drain electrode is electrically
The grid of the second thin film transistor (TFT) (T2) is connected, the drain electrode of second thin film transistor (TFT) (T2) accesses power supply positive voltage (VDD),
Source electrode is electrically connected the anode of organic light emitting diode (D1)；The second film crystalline substance is electrically connected in the both ends of the capacitor (C1)
The grid and source electrode of body pipe (T2)；The cathode of the Organic Light Emitting Diode (D1) accesses power supply negative voltage (VSS)；The threshold value
Voltage obtains the source electrode that module (10) are electrically connected the second thin film transistor (TFT) (T2)；
In threshold voltage reconnaissance phase, scanning signal (Scan) control first film transistor (T1) conducting, the source electrode
Preset reference is written to the grid of the second thin film transistor (TFT) (T2) in first film transistor (T1) of the driver (80) through being connected
Voltage, the threshold voltage obtain the source voltage of module (10) detecting the second thin film transistor (TFT) (T2), according to the second film crystalline substance
The source voltage of body pipe (T2) and preset reference voltage obtain the threshold voltage of the second thin film transistor (TFT) (T20)；
In data write phase, scanning signal (Scan) control first film transistor (T1) conducting, source electrode driver
(80) grid of first film transistor (T1) write-in the second thin film transistor (TFT) (T2) by corresponding offset data voltage through being connected
Pole；
In driving light emitting phase, scanning signal (Scan) control first film transistor (T1) cut-off.
3. the compensation system of OLED display as claimed in claim 2, which is characterized in that the threshold voltage obtains module
(10) the detecting control module (12) for including detecting voltage module (11) and being electrically connected with detecting voltage module (11)；It is described to detect
It surveys control module (12) and is electrically connected the storage control module (20)；It is thin that the detecting voltage module (11) is electrically connected second
The source electrode of film transistor (T2)；
In threshold voltage reconnaissance phase, the storage control module (20) reads the initial threshold electricity in the first memory module (30)
It presses and is transmitted to detecting control module (12)；The detecting control module (12) controls detecting voltage module (11) detecting the
The source voltage of two thin film transistor (TFT)s (T2) is simultaneously transmitted to detecting control module (12), and the detecting control module (12) is according to the
The source voltage of two thin film transistor (TFT)s (T2) and preset reference voltage obtain the threshold voltage of the second thin film transistor (TFT) (T2)
And subtracts each other with initial threshold voltage, obtain threshold voltage variation value and be transmitted to storage control module (20).
4. the compensation system of OLED display as described in claim 1, which is characterized in that further include being obtained with threshold voltage
Module (10) and storage control module (20) are electrically connected the first transmission module (41) and obtain module with threshold voltage
(10) and the second transmission module (42) for being electrically connected of storage control module (20)；
In threshold voltage reconnaissance phase, the storage control module (20) passes through the second transmission module (42) for initial threshold voltage
It is transmitted to threshold voltage and obtains module (10)；The threshold voltage obtains module (10) and passes through the first transmission module (41) for threshold value
Voltage change is transmitted to storage control module (20).
5. the compensation system of OLED display as claimed in claim 4, which is characterized in that first transmission module (41)
Including the second memory module (411) and third memory module (412)；Second memory module (411) and threshold voltage obtain
Module (10) and storage control module (20) are electrically connected；The third memory module (412) and threshold voltage obtain module
(10) and storage control module (20) is electrically connected；
Second transmission module (42) includes the 4th memory module (421) and the 5th memory module (422)；4th storage
Module (421) obtains module (10) with threshold voltage and storage control module (20) is electrically connected；5th memory module
(422) module (10) are obtained with threshold voltage and storage control module (20) is electrically connected；
In threshold voltage reconnaissance phase, the storage control module (20) utilizes the 4th memory module (421) and the 5th storage mould
Block (422) carries out ping-pong operation and initial threshold voltage is transmitted to threshold voltage acquisition module (10)；The threshold voltage obtains
Module (10) carries out ping-pong operation for threshold voltage variation value using the second memory module (411) and third memory module (412)
It is transmitted to storage control module (20).
6. the compensation system of OLED display as claimed in claim 5, which is characterized in that first memory module (30)
For third generation Double Data Rate synchronous DRAM；
Second memory module (411), third memory module (412), the 4th memory module (421) and the 5th memory module
It (422) is static random access memory.
7. the compensation system of OLED display as described in claim 1, which is characterized in that further include being electrically connected first to deposit
The flash memory module (60) for storing up the flash memory control module (50) of module (30) and being electrically connected with flash memory control module (50)；
In shut-down-phase, the flash memory control module (50) is read the threshold voltage variation value in the first memory module (30) and is deposited
Storage is in flash memory module (60).
8. the compensation system of OLED display as described in claim 1, which is characterized in that further include and storage control module
(20) data mapping module (70) being electrically connected；The source electrode driver (80) controls through data mapping module (70) and storage
Module (20) is electrically connected；
In data write phase, the storage control module (20) is by the optical compensation data voltage and threshold voltage variation value
Corresponding offset data signal is exported after superposition to data mapping module (70), the data mapping module (70) is to offset data
Signal is transmitted in source electrode driver (80) after carrying out mapping processing.
9. the compensation system of OLED display as described in claim 1, which is characterized in that first memory module (30)
Including mutually independent first storage region (31), the second storage region (32) and third storage region (33)；Described first deposits
Storage area domain (31) is used for storing initial threshold voltage；Second storage region (32) is for storing brightness and optical compensation data
The look-up table of the corresponding relationship of voltage；The third storage region (33) is for storing threshold voltage variation value.
10. a kind of compensation method of OLED display is applied to such as the described in any item OLED displays of claim 1-9
Compensation system, which comprises the steps of:
Step S1, into threshold voltage reconnaissance phase；
The storage control module (20) reads the initial threshold voltage in the first memory module (30) and is transmitted to threshold voltage
It obtains module (10)；The threshold voltage obtains the threshold of the driving thin film transistor (TFT) of module (10) detecting pixel-driving circuit (90)
Threshold voltage simultaneously subtracts each other with initial threshold voltage, obtains threshold voltage variation value and is transmitted to storage control module (20)；Storage control
Molding block (20) stores the threshold voltage variation value into the first memory module (30)；
Step S2, into data write phase；
The storage control module (20) accesses initial data signal and obtains the corresponding brightness of initial data signal, according to initial
The corresponding brightness of data-signal is looked into from the corresponding relationship of brightness and optical compensation data voltage in the first memory module (30)
It looks in table and obtains corresponding optical compensation data voltage, then the read threshold voltages changing value from the first memory module (30),
Corresponding offset data signal will be exported to source drive after the optical compensation data voltage and the superposition of threshold voltage variation value
Device (80), source electrode driver (80) generate corresponding offset data voltage and export to pixel-driving circuit (90).
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| CN201810786724.1A CN109036268B (en) | 2018-07-17 | 2018-07-17 | Compensation system and compensation method of OLED display device |
| PCT/CN2018/123264 WO2020015317A1 (en) | 2018-07-17 | 2018-12-24 | Compensation system and compensation method for organic light-emitting diode display module |
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| CN109036268B (en) | 2020-06-30 |
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