CN104021755B - A kind of image element circuit, its driving method and display device - Google Patents
A kind of image element circuit, its driving method and display device Download PDFInfo
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- CN104021755B CN104021755B CN201410219292.8A CN201410219292A CN104021755B CN 104021755 B CN104021755 B CN 104021755B CN 201410219292 A CN201410219292 A CN 201410219292A CN 104021755 B CN104021755 B CN 104021755B
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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]
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Abstract
nullThe invention discloses a kind of image element circuit、Its driving method and display device，In the image element circuit that the embodiment of the present invention provides，When driving module to provide driving voltage for luminescent device，This driving voltage is sampled by sampling module，The driving voltage that processing module samples according to sampling module processes，And the luminosity of the luminescent device prestored is along with the corresponding relation of change and the driving voltage of the time of use，Obtain the compensation voltage corresponding with this driving voltage，The compensation voltage that processing module is determined by compensating module is input to the luminescent device of correspondence，Achieve and use the difference of time that the driving voltage of luminescent device is carried out different compensation functions according to luminescent device，Avoid due to luminescent device along with the brightness increasing the luminescent device using identical driving voltage to occur when driving luminescent device of the time of use can reduce，And the problem that the display brightness of the display floater caused is uneven，Improve the uniformity of display floater display brightness.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of image element circuit, its driving method and display dress
Put.
Background technology
At present, at existing organic elctroluminescent device (OLED, Organic Light Emitting
Diode), in, the luminosity of OLED and driving electric current are directly proportional, and and driving voltage exponentially
Relation；When low gray scale shows, the driving voltage of the OLED change shadow to its luminosity
Ring clearly.The electric property of OLED has decayed along with the increase of the time of use, OLED
Device in use its voltage drop can increased, and i.e. along with the growth of the time of use, uses identical
When driving voltage drives OLED, the brightness of OLED can reduce so that display brightness is uneven,
Thus affect the display effect of whole image.And OLED belongs to electric current and drives, need stable electric current
Control luminescence, due to the reason such as manufacturing process and device aging, the driving transistor of image element circuit can be made
Threshold voltage VthThere is inhomogeneities, which results in the electric current generation flowing through each pixel OLED
Change makes display brightness uneven, also can affect the display effect of whole image.
Therefore, typically can introduce corresponding internal compensation technology when carrying out pixel circuit design, there is inside
Compensate function image element circuit, as it is shown in figure 1, include: drive transistor T1, switching transistor T2,
Input control circuit module, electric capacity C and OLED；When image element circuit works, use inside this
Compensate circuit, can make the luminous driving voltage of driving luminescent device only with data signal end at the data of input
Signal voltage is relevant, unrelated with the threshold voltage driving transistor, is avoided that threshold voltage is to luminescent device
Impact, can increased it can however not eliminate OLED in use its voltage drop so that aobvious
Show brightness irregularities, the problem affecting the display effect of whole image.
Therefore, how to alleviate the electric property of OLED to decay along with the growth of the time of use and to bring
The problem affecting the display effect of whole image, is those skilled in the art's problems of needing solution badly.
Summary of the invention
Embodiments provide a kind of image element circuit, its driving method and display device, send out in order to solving
Optical device increases, along with the time of use, the problem that the display floater display brightness that brings of luminance-reduction is uneven.
Embodiments provide a kind of image element circuit, including luminescent device with for for described luminescent device
The driving module of driving voltage is provided, also includes: sampling module, compensating module and processing module；Its
In,
The input of described sampling module is connected with the output of described driving module, and described sampling module is used for
The driving voltage providing described driving module is sampled；
The input of described processing module is connected with the output of described sampling module, and described processing module is used for
The driving voltage sampled according to described sampling module, and the luminance of the described luminescent device prestored
Spend the corresponding relation of the change along with the time of use and driving voltage, determine the benefit corresponding with described driving voltage
Repay voltage；
The input of described compensating module is connected with the output of described processing module, and described compensating module is used for
The compensation voltage described processing module determined is input to described luminescent device.
In the above-mentioned image element circuit that the embodiment of the present invention provides, drive electricity driving module to provide for luminescent device
During pressure, this driving voltage is sampled by sampling module, the driving that processing module samples according to sampling module
Voltage processes, and the luminosity of the luminescent device prestored along with use the time change with drive
The corresponding relation of dynamic voltage, obtains the compensation voltage corresponding with this driving voltage, and compensating module is by processing module
The voltage that compensates determined is input to the luminescent device of correspondence, it is achieved that use the time not according to luminescent device
Different compensation functions is carried out, it is to avoid owing to luminescent device is along with use with to the driving voltage of luminescent device
The brightness increasing the luminescent device using identical driving voltage to occur when driving luminescent device of time can be dropped
Low, and the problem that the display brightness of the display floater caused is uneven, improve display floater display brightness
Uniformity.
In a kind of possible embodiment, the embodiment of the present invention provide above-mentioned image element circuit in, described in adopt
Original mold block includes: the first film transistor and the second thin film transistor (TFT)；Wherein,
The grid of described the first film transistor and sampled signal control end and are electrical connected, described sampled signal control
End processed is in the conduction state for controlling described sampling module in sampling time section；
The drain electrode of described the first film transistor respectively with the source electrode of described second thin film transistor (TFT) and described drive
The output of dynamic model block is electrical connected；
The source electrode of described the first film transistor is electrical connected with the grid of described second thin film transistor (TFT)；
The drain electrode of described second thin film transistor (TFT) is electrical connected with the input of described processing module.
In a kind of possible embodiment, in the above-mentioned image element circuit that the embodiment of the present invention provides, described benefit
Repay module to include: the 3rd thin film transistor (TFT) and the 4th thin film transistor (TFT): wherein,
The grid of described 3rd thin film transistor (TFT) is electrical connected with compensation signal control end, described compensation signal control
End processed is in the conduction state for controlling described compensating module in the compensation time period；
The drain electrode of described 3rd thin film transistor (TFT) respectively with source electrode and the described place of described 4th thin film transistor (TFT)
The output of reason module is electrical connected；
Described 3rd thin film transistor (TFT) source electrode is electrical connected with the grid of described 4th thin film transistor (TFT)；
The drain electrode of described 4th thin film transistor (TFT) is electrical connected with described luminescent device input.
In a kind of possible embodiment, in the above-mentioned image element circuit that the embodiment of the present invention provides, described place
The input of reason module is same port with output；Described sampled signal controls end or described compensation signal
Controlling end timesharing drives corresponding described sampling module or compensating module in the conduction state.
In a kind of possible embodiment, in the above-mentioned image element circuit that the embodiment of the present invention provides, also include:
It is connected between the output of described sampling module and the input of described processing module, and is connected to described
Cache module between input and the output of described processing module of compensating module；Described cache module is used
In the compensation voltage letter that the drive voltage signal or described processing module that cache the sampling of described sampling module determine
Number.
In a kind of possible embodiment, in the above-mentioned image element circuit that the embodiment of the present invention provides, described slow
Storing module includes electric capacity, one end ground connection of described electric capacity, and the other end is connected to the output of described sampling module
And between the input of described processing module, and it is connected to the input of described compensating module and described process
Between the output of module.
In a kind of possible embodiment, in the above-mentioned image element circuit that the embodiment of the present invention provides, described place
Reason module includes:
AD conversion unit, the analog signal of the driving voltage for being sampled by described sampling module is converted into
Corresponding data signal；
Memory cell, for storing the luminosity of the described luminescent device pre-build along with the time of use
Change and the corresponding relation of driving voltage；
Determine unit, the data signal after changing according to described AD conversion unit, and prestore
The luminosity of described luminescent device along with the corresponding relation of change and the driving voltage of the time of use, determine
Go out the data signal that compensate voltage corresponding with described driving voltage；
D/A conversion unit, right for the described data signal compensating voltage determining that unit determines is converted into
The analog signal answered.
Embodiments provide a kind of display device, including the embodiment of the present invention provide above-mentioned any one
Plant image element circuit.
Embodiments provide the driving method of a kind of image element circuit, including:
When driving module to luminescent device input driving voltage, described driving voltage is adopted by sampling module
Sample, and under sampled signal controls the control of end, the described driving voltage sampled is input to processing module；
The described driving voltage that processing module samples according to described sampling module, and prestore described
The change along with the time of use of the luminosity of luminescent device and the corresponding relation of driving voltage, determine with described
The compensation voltage that driving voltage is corresponding, and described compensation voltage is input to compensating module；
The compensation that described processing module is determined under the control of compensation signal control end by described compensating module
Voltage is input to described luminescent device.
In a kind of possible embodiment, the above-mentioned pixel circuit drive method that the embodiment of the present invention provides
In, the described driving voltage that described processing module samples according to described sampling module, and prestore
The luminosity of described luminescent device along with the corresponding relation of change and the driving voltage of the time of use, determine with
The compensation voltage that described driving voltage is corresponding, specifically includes:
The mould of the driving voltage that described sampling module is sampled by the AD conversion unit in described processing module
Intend signal and be converted into the data signal of correspondence；
Data signal after cell is changed according to described AD conversion unit really in described processing module, with
And the luminosity of the described luminescent device prestored is along with change and driving voltage right of the time of use
Should be related to, determine the data signal compensating voltage that described luminescent device is compensated；
D/A conversion unit in described processing module is by the described numeral compensating voltage determining that unit determines
Signal is converted into the analog signal of correspondence.
Accompanying drawing explanation
Fig. 1 is the structural representation of the image element circuit using internal compensation in prior art；
The structural representation of the image element circuit that Fig. 2 provides for the embodiment of the present invention；
The concrete structure schematic diagram of the image element circuit that Fig. 3 provides for the embodiment of the present invention；
Sampled signal in the image element circuit that Fig. 4 provides for the embodiment of the present invention controls end and compensation signal control
The working timing figure of end；
The structural representation of the analog to digital conversion circuit that Fig. 5 provides for the embodiment of the present invention；
The structural representation of the D/A converting circuit that Fig. 6 provides for the embodiment of the present invention；
The luminosity of the luminescent device that Fig. 7 provides for the embodiment of the present invention is bent with the corresponding relation of driving voltage
Line；
The flow chart of the driving method of the image element circuit that Fig. 8 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings, image element circuit, its driving method and the display device embodiment of the present invention provided
Detailed description of the invention be described in detail.
A kind of image element circuit that the embodiment of the present invention provides, as in figure 2 it is shown, include luminescent device 01 and use
In the driving module 02 for luminescent device offer driving voltage, also include: sampling module 03, compensating module
04 and processing module 05；Wherein,
The input of sampling module 03 is connected with the output driving module 02, and sampling module 03 is for right
The driving voltage driving module 02 to provide is sampled；
The input of processing module 05 is connected with the output of sampling module 03, and processing module 05 is for root
The driving voltage sampled according to sampling module 03, and the luminosity of the luminescent device 01 prestored with
The corresponding relation of driving voltage, determines the compensation voltage corresponding with driving voltage；
The input of compensating module 04 is connected with the output of processing module 05, and compensating module 04 is used for will
The compensation voltage that processing module 05 is determined is input to luminescent device.
In the specific implementation, in the above-mentioned image element circuit that the embodiment of the present invention provides, drive module 02 for sending out
Optical device 01 provides driving voltage, when driving module 02 that luminescent device 01 is inputted driving voltage, adopts
Driving voltage is sampled by original mold block 03, and the driving voltage of sampling is exported processing module 05；Place
Sampled voltage is processed by reason module 05, determines the compensation voltage corresponding with driving voltage, and will compensate
Voltage exports compensating module 04；The compensation voltage that processing module 05 is determined by compensating module 04 is input to send out
Optical device 01.
In the above-mentioned image element circuit that the embodiment of the present invention provides, provide for luminescent device 01 driving module 02
During driving voltage, this driving voltage is sampled by sampling module 03, and processing module 05 is according to sampling module
03 driving voltage sampled processes, and the luminosity of the luminescent device 01 prestored along with
The change of use time and the corresponding relation of driving voltage, obtain the compensation voltage corresponding with this driving voltage,
The compensation voltage that processing module 05 is determined by compensating module 04 is input to the luminescent device 01 of correspondence, it is achieved
Use the difference of time that the driving voltage of luminescent device 01 is carried out different compensation according to luminescent device 01
Function, it is to avoid use identical driving voltage to drive along with increasing of the time of use due to luminescent device 01
The brightness of the luminescent device occurred during luminescent device 01 can reduce, and the display brightness of the display floater caused
Uneven problem, improves the uniformity of display floater display brightness.
Further, in the above-mentioned image element circuit that the embodiment of the present invention provides, as it is shown on figure 3, drive module
02 can be identical with prior art, uses internal compensation circuit, specifically includes: input control module, electric capacity
Cst, driving transistor DTFT, switching transistor STFT.When image element circuit works, drive module 02
The driving voltage after compensating is provided commonly through node N1 for luminescent device 01 with compensating module 04；Wherein,
The driving electric current being input to luminescent device 01 is:
Wherein, VMendCompensation voltage for compensating module 04 output.So, by the work of above-mentioned image element circuit
Make process, it is achieved that the driving voltage of luminescent device 01 is compensated, it is to avoid due to luminescent device 01
Along with the luminance-reduction occurred when increasing and use identical driving voltage driving luminescent device 01 of the time of use,
And the problem that the display brightness of the display floater caused is uneven, improve the uniform of display floater display brightness
Property.
Specifically, the driving transistor DTFT driving module 02 to have can use P-type transistor, also
N-type transistor can be used, do not limit at this.
Specifically, above-mentioned luminescent device 01 generally refers to Organic Light Emitting Diode (OLED), the most also may be used
To be other electroluminescent devices, do not limit at this.
Further, the above-mentioned image element circuit that the embodiment of the present invention provides, in the specific implementation, above-mentioned pixel
Sampling module 03 in circuit, as it is shown on figure 3, can specifically include: the first film transistor T1 and
Two thin film transistor (TFT) T2；Wherein,
The grid of the first film transistor T1 and sampled signal control end SW1 and are electrical connected, sampled signal control
End SW1 processed is in the conduction state for controlling sampling module 03 in sampling time section；
The drain electrode of the first film transistor T1 respectively with the source electrode of the second thin film transistor (TFT) T2 and drive module
The output of 02 is electrical connected；
The source electrode of the first film transistor T1 and the grid of the second thin film transistor (TFT) T2 are electrical connected；
The drain electrode of the second thin film transistor (TFT) T2 is electrical connected with the input of processing module 05.
In the specific implementation, in the above-mentioned image element circuit that the embodiment of the present invention provides, the of sampling module 03
One thin film transistor (TFT) T1 and the second thin film transistor (TFT) T2 can be N-type transistor or P-type transistor simultaneously,
Do not limit at this.The following stated is all with the first film transistor T1 and the second thin film transistor (TFT) T2 as P
As a example by transistor npn npn, the above-mentioned sampling module 03 that the embodiment of the present invention provides controls end SW1 in sampled signal
When receiving low level signal, the first film transistor T1 and the second thin film transistor (TFT) T2 is in the conduction state,
Constitute a unidirectional signal path from the output to the input of processing module 05 driving module 02, i.e.
Under sampled signal controls the control of end SW1, the driving voltage driving module 02 output is sampled.And
And, according to above-mentioned the first film transistor T1 and the annexation of the second thin film transistor (TFT) T2, adopting
In original mold block 03, the transmission direction of signal is only capable of from defeated to processing module 05 of output driving module 02
Enter to hold one-way conduction, reversely end.
Further, the above-mentioned image element circuit that the embodiment of the present invention provides, in the specific implementation, above-mentioned pixel
The compensating module 04 of circuit, as it is shown on figure 3, can specifically include: the 3rd thin film transistor (TFT) T3 and the 4th
Thin film transistor (TFT) T4；Wherein,
The grid of the 3rd thin film transistor (TFT) T3 is electrical connected with compensation signal control end SW2, compensates signal control
End SW2 processed is in the conduction state in compensation time period control and compensation module 04；
The drain electrode of the 3rd thin film transistor (TFT) T3 respectively with source electrode and the processing module of the 4th thin film transistor (TFT) T4
The output of 05 is electrical connected；
The source electrode of the 3rd thin film transistor (TFT) T3 and the grid of the 4th thin film transistor (TFT) T4 are electrical connected；
The drain electrode of the 4th thin film transistor (TFT) T4 is electrical connected with luminescent device input.
In the specific implementation, in the above-mentioned image element circuit that the embodiment of the present invention provides, the of compensating module 04
Three thin film transistor (TFT) T3 and the 4th thin film transistor (TFT) T4 can be N-type transistor or P-type transistor simultaneously,
Do not limit at this.The following stated is all with the 3rd thin film transistor (TFT) T3 and the 4th thin film transistor (TFT) T4 as P
As a example by transistor npn npn, the above-mentioned compensating module 04 that the embodiment of the present invention provides is at compensation signal control end SW2
When receiving low level signal, the 3rd thin film transistor (TFT) T3 and the 4th thin film transistor (TFT) T4 is in the conduction state,
Constitute a unidirectional signal path from the output of processing module 05 to the input of luminescent device 01, i.e.
Under the control of compensation signal control end SW2, the compensation voltage that processing module 05 exports is input to photophore
The input of part 01.Further, according to above-mentioned 3rd thin film transistor (TFT) T3's and the 4th thin film transistor (TFT) T4
Annexation understands, and in compensating module 04, the transmission direction of signal is only capable of the output from processing module 05
To the input one-way conduction of luminescent device 01, reversely end.
Further, in the specific implementation, in the above-mentioned image element circuit that the embodiment of the present invention provides, typically
Sampling module 03 and compensating module 04 are arranged at display floater with driving module 02 and luminescent device 01
Viewing area, processing module 05 is arranged on non-display area, in order to will sampling and compensate signal transmission
To non-display area, need to be respectively provided with lead-out wire, in order to save the quantity of wiring, it is also possible to mould will be processed
The input of block 05 and output are set to same port, the i.e. output of sampling module 03 and compensate mould
The input of block 04 is commonly connected to a port of processing module 05.On the basis of this annexation,
In order to avoid interfering between sampling module 03 and compensating module 04, only allow wherein one at synchronization
Individual module is in running order, accordingly, it would be desirable to sampled signal controls end SW1 or compensation signal control end SW2
Timesharing drives corresponding sampling module 03 or compensating module 04 in the conduction state, and sampled signal controls end
The work schedule of SW1 and compensation signal control end SW2, as shown in Figure 4.This way it is ensured that signal stream
Dynamic one-way so that sampling process is not disturbed by outer signals with compensation process.
In the specific implementation, the above-mentioned image element circuit that the embodiment of the present invention provides can also include being connected to sampling
Between output and the input of processing module 05 of module 03, and it is connected to the defeated of compensating module 04
Enter the cache module 06 between end and the output of processing module 05, as it is shown on figure 3, cache module 06
Can cache sampling module 03 sampling drive voltage signal or processing module 05 determine compensation voltage letter
Number.So, use cache module 06 that sampled voltage signal or compensation voltage signal are cached, a side
Face can carry out the electric current signal conversion to voltage, on the one hand coordinates corresponding sampled signal to control end SW1
Or the work schedule of compensation signal control end SW2, reduce the brush of the real time data read-write realizing external compensation
New frequency, thus reduce power consumption.
In the specific implementation, the cache module 06 in the above-mentioned image element circuit that the embodiment of the present invention provides, such as figure
Shown in 3, can be an electric capacity C1, one end a of electric capacity C1 be connected to the output of sampling module 03 with
Between the input of processing module 05, and it is connected to input and the processing module 05 of compensating module 04
Output between, other end b ground connection.So, by capacitor charge and discharge process, to sampled voltage or benefit
Repay voltage cache and discharge, preferably the driving voltage of luminescent device 01 can be sampled or mend
Repay, thus the decay to the electric property of luminescent device 01 compensates, bright to guarantee that display system shows
The uniformity of degree.
In the specific implementation, the processing module 05 in the above-mentioned image element circuit that the embodiment of the present invention provides, such as figure
Shown in 3, specifically include:
AD conversion unit 051, the analog signal conversion of the driving voltage for sampling module 03 is sampled
Become corresponding data signal；
Memory cell 052, for storing the luminosity of the luminescent device 01 pre-build along with the use time
The corresponding relation of change and driving voltage；
Determine unit 053, the data signal after changing according to AD conversion unit 051, and in advance
The change along with the time of use of the luminosity of the luminescent device of storage and the corresponding relation of driving voltage, determine
Go out the data signal that compensate voltage corresponding with driving voltage；
D/A conversion unit 054, for the data signal conversion compensating voltage that will determine that unit 053 determines
Become corresponding analog signal.
Fig. 5 and Fig. 6 respectively illustrates the circuit diagram of AD conversion unit and D/A conversion unit, due to
Analog to digital conversion circuit is same as the prior art with the operation principle of D/A converting circuit, in place of repeating at this no longer
Repeat.
In the specific implementation, the storage in processing module 05 in the image element circuit that the embodiment of the present invention provides
The luminosity of the luminescent device 01 of unit storage and the corresponding relation of driving voltage, be according to luminescent device
The monochromatic luminosity of the VL curve of 01, i.e. luminescent device 01 is over time and between driving voltage
Corresponding relation, as it is shown in fig. 7, the corresponding look-up table set up, and be prestored in memory cell 052.
The luminosity of the luminescent device 01 that processing module 05 prestores according to memory cell 052 is along with when using
Between the look-up table of corresponding relation of change and driving voltage, determine the compensation voltage corresponding with driving voltage,
Compensation voltage exports compensating module 04, and compensation voltage is exported luminescent device 01 by compensating module 04,
The driving voltage of luminescent device 01 is compensated, thus the decay to luminescent device electric property is mended
Repay, it is to avoid use identical driving voltage to drive to send out along with increasing of the time of use due to luminescent device 01
The luminance-reduction occurred during optical device 01, and the problem that the display brightness of the display floater caused is uneven,
The uniformity that improve display floater display brightness ensure that the uniformity of display system display brightness.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of display device, real including the present invention
Execute any one image element circuit above-mentioned that example provides.Owing to this display device solves principle and the pixel electricity of problem
Road is similar, and therefore the enforcement of this display device may refer to the enforcement of image element circuit, repeats no more in place of repetition.
In the specific implementation, the above-mentioned display device that the embodiment of the present invention provides can apply to LCD
Plate, it is also possible to be applied to organic EL display panel, does not limits at this.This display device can be
Display, mobile phone, TV, notebook, all-in-one etc., for other requisite group of display device
One-tenth part is and it will be apparent to an ordinarily skilled person in the art that have, and does not repeats at this, the most should not make
For limitation of the present invention.
Based on same inventive concept, the embodiment of the present invention additionally provides the driving method of a kind of image element circuit, as
Shown in Fig. 8, comprise the steps:
S101, drive module to luminescent device input driving voltage time, driving voltage is carried out by sampling module
Sampling, and under sampled signal controls the control of end, the driving voltage sampled is input to processing module；
In the specific implementation, sampling module can drive the module every frame to luminescent device input driving voltage
Between driving voltage is sampled, it is also possible within the time of every frame, driving voltage is sampled, at this
Do not limit；
The driving voltage that S102, processing module sample according to sampling module, and the photophore prestored
The change along with the time of use of the luminosity of part and the corresponding relation of driving voltage, determine and driving voltage pair
The compensation voltage answered, and compensation voltage is input to compensating module；
The compensation voltage that processing module is determined under the control of compensation signal control end by S103, compensating module
It is input to luminescent device.
In the driving method of the above-mentioned image element circuit that the embodiment of the present invention provides, it is luminescent device driving module
When providing driving voltage, this driving voltage is sampled by sampling module, and processing module is adopted according to sampling module
Sample to driving voltage process, and the luminosity of the luminescent device prestored is along with the use time
The corresponding relation of change and driving voltage, obtain the compensation voltage corresponding with this driving voltage, compensating module
The voltage that compensates processing module determined is input to the luminescent device of correspondence, it is achieved that make according to luminescent device
By the difference of time, the driving voltage of luminescent device is carried out different compensation functions, it is to avoid due to photophore
Part increases, along with the time of use, the luminescent device using identical driving voltage to occur when driving luminescent device
Brightness can reduce, and the problem that the display brightness of the display floater caused is uneven, improve display floater
The uniformity of display brightness.
In the specific implementation, in the driving method of the above-mentioned image element circuit that the embodiment of the present invention provides, process mould
The driving voltage that block samples according to sampling module, and the luminosity of the luminescent device prestored along with
The change of use time and the corresponding relation of driving voltage, determine the compensation voltage corresponding with driving voltage, can
To use following manner to realize:
First, the simulation letter of the driving voltage that sampling module is sampled by the AD conversion unit in processing module
Number it is converted into the data signal of correspondence；
Then, the data signal after cell is changed according to AD conversion unit really in processing module, and deposit
The luminosity of the luminescent device that storage unit prestores is along with change and driving voltage right of the time of use
Should be related to, determine the data signal compensating voltage that luminescent device is compensated；
Finally, the data signal compensating voltage that the D/A conversion unit in processing module will determine that unit determines
It is converted into the analog signal of correspondence.
Embodiments providing a kind of image element circuit, its driving method and display device, the present invention implements
In the above-mentioned image element circuit that example provides, when driving module to provide driving voltage for luminescent device, sampling module
Sampling this driving voltage, the driving voltage that processing module samples according to sampling module processes,
And the luminosity of the luminescent device prestored along with use the time change corresponding with driving voltage
Relation, obtains the compensation voltage corresponding with this driving voltage, the compensation that processing module is determined by compensating module
Voltage is input to the luminescent device of correspondence, it is achieved that use the difference of time to luminescent device according to luminescent device
Driving voltage carry out different compensation functions, it is to avoid adopt along with the growth of the time of use due to luminescent device
The brightness of the luminescent device occurred when driving luminescent device with identical driving voltage can reduce, and cause aobvious
Show the problem that the display brightness of panel is uneven, improve the uniformity of display floater display brightness.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. an image element circuit, including luminescent device with for providing driving voltage for described luminescent device
Drive module, it is characterised in that also include: sampling module, compensating module and processing module；Wherein,
The input of described sampling module is connected with the output of described driving module, and described sampling module is used for
The driving voltage providing described driving module is sampled；
The input of described processing module is connected with the output of described sampling module, and described processing module is used for
The driving voltage sampled according to described sampling module, and the luminance of the described luminescent device prestored
Spend the corresponding relation of the change along with the time of use and driving voltage, determine the benefit corresponding with described driving voltage
Repay voltage；
The input of described compensating module is connected with the output of described processing module, and described compensating module is used for
The compensation voltage described processing module determined is input to described luminescent device；Described luminescent device is organic
Light emitting diode；
Also include: be connected between the output of described sampling module and the input of described processing module, and
And it is connected to the cache module between the input of described compensating module and the output of described processing module；
Described cache module is for caching the drive voltage signal of described sampling module sampling or described process mould
The compensation voltage signal that block determines.
2. image element circuit as claimed in claim 1, it is characterised in that described sampling module includes: the
One thin film transistor (TFT) and the second thin film transistor (TFT)；Wherein,
The grid of described the first film transistor and sampled signal control end and are electrical connected, described sampled signal control
End processed is in the conduction state for controlling described sampling module in sampling time section；
The drain electrode of described the first film transistor respectively with the source electrode of described second thin film transistor (TFT) and described drive
The output of dynamic model block is electrical connected；
The source electrode of described the first film transistor is electrical connected with the grid of described second thin film transistor (TFT)；
The drain electrode of described second thin film transistor (TFT) is electrical connected with the input of described processing module.
3. image element circuit as claimed in claim 2, it is characterised in that described compensating module includes: the
Three thin film transistor (TFT)s and the 4th thin film transistor (TFT)；Wherein,
The grid of described 3rd thin film transistor (TFT) is electrical connected with compensation signal control end, described compensation signal control
End processed is in the conduction state for controlling described compensating module in the compensation time period；
The drain electrode of described 3rd thin film transistor (TFT) respectively with source electrode and the described place of described 4th thin film transistor (TFT)
The output of reason module is electrical connected；
Described 3rd thin film transistor (TFT) source electrode is electrical connected with the grid of described 4th thin film transistor (TFT)；
The drain electrode of described 4th thin film transistor (TFT) is electrical connected with described luminescent device input.
4. image element circuit as claimed in claim 3, it is characterised in that the input of described processing module
It is same port with output；
Described sampled signal controls end and drives corresponding described sampling mould with described compensation signal control end timesharing
Block and compensating module are in the conduction state.
5. image element circuit as claimed in claim 1, it is characterised in that described cache module includes electric capacity,
One end ground connection of described electric capacity, the other end is connected to the output of described sampling module and described processing module
Between input, and be connected to the input of described compensating module and described processing module output it
Between.
6. the image element circuit as described in any one of claim 1-5, it is characterised in that described processing module
Including:
AD conversion unit, the analog signal of the driving voltage for being sampled by described sampling module is converted into
Corresponding data signal；
Memory cell, for storing the luminosity of the described luminescent device pre-build along with the time of use
Change and the corresponding relation of driving voltage；
Determine unit, the data signal after changing according to described AD conversion unit, and prestore
The luminosity of described luminescent device along with the corresponding relation of change and the driving voltage of the time of use, determine
Go out the data signal that compensate voltage corresponding with described driving voltage；
D/A conversion unit, right for the described data signal compensating voltage determining that unit determines is converted into
The analog signal answered.
7. a display device, it is characterised in that include the pixel as described in any one of claim 1-6
Circuit.
8. the driving method of the image element circuit as described in any one of claim 1-6, it is characterised in that
Including:
When driving module to luminescent device input driving voltage, described driving voltage is adopted by sampling module
Sample, and under sampled signal controls the control of end, the described driving voltage sampled is input to processing module；
After described driving voltage is sampled by described sampling module, cache module caches described sampling module
The drive voltage signal of sampling；
The described driving voltage that processing module samples according to described sampling module, and prestore described
The change along with the time of use of the luminosity of luminescent device and the corresponding relation of driving voltage, determine with described
The compensation voltage that driving voltage is corresponding, and described compensation voltage is input to compensating module；
After described processing module determines the compensation voltage corresponding with described driving voltage, cache module caches institute
State the compensation voltage signal that processing module determines；
The compensation that described processing module is determined under the control of compensation signal control end by described compensating module
Voltage is input to described luminescent device.
9. the driving method of image element circuit as claimed in claim 8, it is characterised in that described process mould
The described driving voltage that block samples according to described sampling module, and the described luminescent device prestored
The luminosity change along with the time of use and the corresponding relation of driving voltage, determine and described driving voltage pair
The compensation voltage answered, specifically includes:
The mould of the driving voltage that described sampling module is sampled by the AD conversion unit in described processing module
Intend signal and be converted into the data signal of correspondence；
Data signal after cell is changed according to described AD conversion unit really in described processing module, with
And the luminosity of the described luminescent device prestored is along with change and driving voltage right of the time of use
Should be related to, determine the data signal compensating voltage that described luminescent device is compensated；
D/A conversion unit in described processing module is by the described numeral compensating voltage determining that unit determines
Signal is converted into the analog signal of correspondence.
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| CN201410219292.8A CN104021755B (en) | 2014-05-22 | 2014-05-22 | A kind of image element circuit, its driving method and display device |
| PCT/CN2014/086311 WO2015176420A1 (en) | 2014-05-22 | 2014-09-11 | Pixel circuit, driving method thereof and display device thereof |
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| CN201410219292.8A CN104021755B (en) | 2014-05-22 | 2014-05-22 | A kind of image element circuit, its driving method and display device |
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| CN104021755B true CN104021755B (en) | 2016-09-07 |
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| CN104021755B (en) * | 2014-05-22 | 2016-09-07 | 京东方科技集团股份有限公司 | A kind of image element circuit, its driving method and display device |
| CN107331346A (en) * | 2017-08-18 | 2017-11-07 | 深圳市华星光电半导体显示技术有限公司 | Brightness regulating apparatus and brightness adjusting method, the display device of display device |
| CN111727471B (en) * | 2018-02-23 | 2022-06-03 | 索尼半导体解决方案公司 | Display device, driving method of display device, and electronic apparatus |
| KR102546312B1 (en) * | 2018-09-28 | 2023-06-22 | 엘지디스플레이 주식회사 | Current Sensing Device And Organic Light Emitting Display Device Including The Same |
| CN109147674B (en) | 2018-10-25 | 2020-11-03 | 深圳创维－Rgb电子有限公司 | AMOLED display ghost eliminating method, display terminal and storage medium |
| CN110730534A (en) * | 2019-10-30 | 2020-01-24 | 广东晟合技术有限公司 | OLED product brightness compensation method |
| CN113077750A (en) * | 2019-12-17 | 2021-07-06 | 咸阳彩虹光电科技有限公司 | Method for maintaining brightness of LED, driving circuit and display device |
| CN114038397A (en) * | 2021-08-18 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Drive compensation circuit, display device, and method for driving display unit |
| CN114005405A (en) * | 2021-10-19 | 2022-02-01 | 惠州华星光电显示有限公司 | Display panel and brightness compensation method thereof |
| CN115268329A (en) * | 2022-07-29 | 2022-11-01 | 青岛海信宽带多媒体技术有限公司 | Optical module and power supply voltage monitoring and compensating method thereof |
| CN116246575A (en) * | 2022-12-23 | 2023-06-09 | 惠科股份有限公司 | Pixel driving circuit, display panel and display device |
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| SG120888A1 (en) * | 2001-09-28 | 2006-04-26 | Semiconductor Energy Lab | A light emitting device and electronic apparatus using the same |
| KR100703500B1 (en) * | 2005-08-01 | 2007-04-03 | 삼성에스디아이 주식회사 | Data Driving Circuit and Driving Method of Light Emitting Display Using the same |
| US20070146253A1 (en) * | 2005-12-22 | 2007-06-28 | Au Optronics Corporation | Method and device for brightness stabilization in AMOLED display |
| KR100893482B1 (en) * | 2007-08-23 | 2009-04-17 | 삼성모바일디스플레이주식회사 | Organic Light Emitting Display and Driving Method Thereof |
| KR100902219B1 (en) * | 2007-12-05 | 2009-06-11 | 삼성모바일디스플레이주식회사 | Organic Light Emitting Display |
| US8299983B2 (en) * | 2008-10-25 | 2012-10-30 | Global Oled Technology Llc | Electroluminescent display with initial nonuniformity compensation |
| CA2688870A1 (en) * | 2009-11-30 | 2011-05-30 | Ignis Innovation Inc. | Methode and techniques for improving display uniformity |
| CN103400545A (en) * | 2011-08-08 | 2013-11-20 | 东莞万士达液晶显示器有限公司 | Pixel circuit |
| CN103280188B (en) * | 2013-06-14 | 2015-09-02 | 电子科技大学 | OLED compensation of ageing system and method |
| CN103578428B (en) * | 2013-10-25 | 2015-12-02 | 华南理工大学 | A kind of driving method of image element circuit of active organic electroluminescent display |
| CN203825990U (en) * | 2014-05-22 | 2014-09-10 | 京东方科技集团股份有限公司 | Pixel circuit and display apparatus |
| CN104021755B (en) * | 2014-05-22 | 2016-09-07 | 京东方科技集团股份有限公司 | A kind of image element circuit, its driving method and display device |
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| CN104021755A (en) | 2014-09-03 |
| WO2015176420A1 (en) | 2015-11-26 |
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