CN109119022A - The luminance compensation unit and method of OLED pixel, display panel and device - Google Patents
The luminance compensation unit and method of OLED pixel, display panel and device Download PDFInfo
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- CN109119022A CN109119022A CN201811061897.3A CN201811061897A CN109119022A CN 109119022 A CN109119022 A CN 109119022A CN 201811061897 A CN201811061897 A CN 201811061897A CN 109119022 A CN109119022 A CN 109119022A
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The embodiment of the invention provides a kind of luminance compensation unit of OLED pixel and methods, display panel and display device, are related to field of display technology, for compensating the brightness decay of OLED pixel.Luminance compensation unit includes the first difference calculating module and processing module, wherein, the first input end of first difference calculating module is electrically connected with the output end of power module, second input terminal of the first difference calculating module is electrically connected with the power supply signal input of pixel circuit, and the first difference calculating module is used to calculate the voltage difference between the output end of power module and the power supply signal input of pixel circuit；The input terminal of processing module is electrically connected with the output end of the first difference calculating module, and the output end of processing module is electrically connected with data line, and processing module is used to obtain real data voltage value Vdata according to voltage difference △ ELVDD.The luminance compensation unit of the OLED pixel is used to compensate the brightness decay of OLED pixel.
Description
[technical field]
The present invention relates to the luminance compensation units and method of field of display technology more particularly to a kind of OLED pixel, display
Panel and device.
[background technique]
Organic Light Emitting Diode (Organic Light Emitting Display, hereinafter referred to as OLED) display device tool
Have that self-luminous, luminous efficiency are high, the response time is short, angular field of view is big, it can be achieved that being generally acknowledged many advantages, such as Flexible Displays by industry
To be most potential display device.
OLED belongs to current driving apparatus, in the luminescence process of OLED pixel, scanning signal, power supply signal and data
Signal collective effect, electric current flow through OLED pixel, and OLED pixel is made to shine.Wherein, power supply signal is by the drive positioned at non-display area
Dynamic IC is provided to each pixel circuit positioned at viewing area through power signal line.But due on power signal line impedance deposit
When a current flows through, power supply signal generates pressure drop on power signal line, the power supply that is an actually-received pixel circuit letter
Number decay, influences the light emission luminance of OLED pixel.
[summary of the invention]
In view of this, the embodiment of the invention provides a kind of luminance compensation unit of OLED pixel and methods, display panel
And device, to compensate the brightness decay of OLED pixel.
On the one hand, the embodiment of the invention provides a kind of luminance compensation unit of OLED pixel, the luminance compensation units
It is electrically connected with power module and pixel circuit, the luminance compensation unit includes:
First difference calculating module, the output of the first input end and the power module of first difference calculating module
End electrical connection, the power supply signal input of the second input terminal and the pixel circuit of first difference calculating module are electrically connected
Connect, first difference calculating module be used for calculate the power module output end and the pixel circuit power supply signal it is defeated
Enter the voltage difference △ ELVDD between end；
Processing module, the input terminal of the processing module are electrically connected with the output end of first difference calculating module, institute
The output end for stating processing module is electrically connected with data line, and the processing module is used to be obtained according to the voltage difference △ ELVDD
Real data voltage value Vdata.
On the other hand, the embodiment of the invention provides a kind of luminance compensation method of OLED pixel, the luminance compensation sides
Method includes:
Power module is to pixel circuit output voltage；
Calculate the voltage difference between the output end of the power module and the power supply signal input of the pixel circuit
△ELVDD；
According to the voltage difference △ ELVDD, real data voltage value Vdata is obtained；
The real data voltage value Vdata is exported to data line；
The data line exports the real data voltage value Vdata to the pixel circuit.
In another aspect, the embodiment of the invention provides a kind of display panel, the display panel includes:
Power module；
Multiple pixel circuits, power module are electrically connected with the power supply signal input of pixel circuit；
Multiple data lines, the data line are electrically connected with the data signal input of the pixel circuit；
Luminance compensation unit, the input terminal of the luminance compensation unit are respectively with the output end of power module and each described
The power supply signal input of pixel circuit is electrically connected, and the output end of the luminance compensation unit is electrically connected with the data line.
Also on the one hand, the embodiment of the invention provides a kind of display device, the display device includes above-mentioned display surface
Plate.
The luminance compensation unit and method of OLED pixel provided in an embodiment of the present invention, display panel and device, by
First difference calculating module and processing module are set in luminance compensation unit, enable the defeated of the first difference calculating module and power module
Outlet is connected with the power supply signal input of pixel circuit, and the output of power module is calculated by the first difference calculating module
Voltage difference △ ELVDD between end and the power supply signal input of pixel circuit, then using processing module according to the voltage
Difference △ ELVDD obtains real data voltage value.That is, luminance compensation unit provided in an embodiment of the present invention passes through first
Difference calculating module calculates pad value of the power supply signal on power signal line, and the pad value is then fed back to processing mould
Block makes processing module according to the pad value, obtains can compensate for part decaying, carries out OLED pixel needed for normal luminous
Real data voltage value Vdata, and obtained real data voltage value Vdata is provided to data line, to compensate due to electricity
The brightness decay of OLED pixel caused by pressure drop on source signal line enables OLED pixel normal luminous.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of schematic diagram of display panel in the prior art；
Fig. 2 is the signal that a kind of luminance compensation unit of OLED pixel provided by the embodiment of the present invention is used for display panel
Figure；
Fig. 3 is a kind of schematic diagram of pixel circuit provided by the embodiment of the present invention；
Fig. 4 is luminance compensation unit the showing for display panel of another kind OLED pixel provided by the embodiment of the present invention
It is intended to；
Fig. 5 is luminance compensation unit the showing for display panel of another OLED pixel provided by the embodiment of the present invention
It is intended to；
Fig. 6 is a kind of flow diagram of the luminance compensation method of OLED pixel provided by the embodiment of the present invention；
Fig. 7 is the flow diagram of the luminance compensation method of another kind OLED pixel provided by the embodiment of the present invention；
Fig. 8 is the flow diagram of the luminance compensation method of another OLED pixel provided by the embodiment of the present invention；
Fig. 9 is a kind of schematic diagram of display panel provided in an embodiment of the present invention；
Figure 10 is a kind of schematic diagram of display device provided by the embodiment of the present invention.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though difference meter may be described using term first, second, third, etc. in embodiments of the present invention
Module is calculated, but these difference calculating modules should not necessarily be limited by these terms.These terms are only used to difference calculating module area each other
It separates.For example, it is poor that the first difference calculating module can also be referred to as second in the case where not departing from range of embodiment of the invention
It is worth computing module, similarly, the second difference calculating module can also be referred to as the first difference calculating module.
As shown in FIG. 1, FIG. 1 is a kind of schematic diagrames of display panel in the prior art, wherein power signal line 1 ' is from being located at
The end IC of non-display area 3 ' extends to each sub-pixel (not shown) positioned at viewing area 2 '.It is assumed that the route of power signal line 1 '
Impedance is R1, and is assumed in single sub-pixel for emitting light, and the driving current on power signal line 1 ' is I1, at this point, the sub-pixel
Light emission luminance be L1, the line drop V1=I1R1 on power signal line 1 '.When multiple sub-pixel for emitting light, power signal line
Driving current on 1 ' will be increased to I2, and the line impedance of power signal line 1 ' is still R1 at this time, therefore power signal line at this time
Line drop on 1 ' will also increase to V2, wherein V2=I2R1 > V1, and the power supply signal for being provided to each sub-pixel is caused to decline
Subtract, so that light emission luminance when above-mentioned multiple sub-pixel for emitting light is reduced to L2, wherein L2 < L1.
Based on this, the embodiment of the invention provides a kind of luminance compensation units of OLED pixel, as shown in Fig. 2, Fig. 2 is this
A kind of luminance compensation unit for OLED pixel that inventive embodiments provide is used for the schematic diagram of display panel, wherein luminance compensation
Unit 1 is electrically connected with power module 2 and pixel circuit 3.Illustratively, as shown in figure 3, Fig. 3 is provided in an embodiment of the present invention
A kind of schematic diagram of pixel circuit, wherein pixel circuit 3 include driving transistor 30,31 sum number of power supply signal input it is believed that
Number input terminal 32, data signal input 32 receive data-signal by data line 4, and power supply signal input 31 passes through power supply letter
Number line 5 receives power supply signal.
Luminance compensation unit 1 includes the first difference calculating module 11 and processing module 12.Specifically, the first difference calculates mould
The first input end of block 11 is electrically connected with the output end of power module 2, the second input terminal and picture of the first difference calculating module 11
The power supply signal input 31 of plain circuit 3 is electrically connected, the first difference calculating module 11 be used to calculate power module 2 output end and
Voltage difference △ ELVDD between the power supply signal input 31 of pixel circuit 3.The input terminal of processing module 12 and the first difference
The output end of computing module 11 is electrically connected, and the output end of processing module 12 is electrically connected with data line 4, and processing module 12 is used for basis
Voltage difference △ ELVDD obtains real data voltage value Vdata.
Specifically, in conjunction with Fig. 2 and Fig. 3, in the work of above-mentioned luminance compensation unit 1,2 output supply voltage of power module
ELVDD1, supply voltage ELVDD1 are input to the power supply signal input 31 of pixel circuit 3 via power signal line 5.Wherein,
The supply voltage of the output end of power module 2 is ELVDD1, and the supply voltage of the power supply signal input 31 of pixel circuit 3 is
ELVDD2, ELVDD1 and ELVDD2 pass through the first input end of the first difference calculating module 11 respectively and the second input terminal enters the
One difference calculating module 11, the first difference calculating module 11 calculate the output end of power module 2 and the power supply letter of pixel circuit 3
The voltage difference △ ELVDD of number input terminal 31, wherein △ ELVDD=ELVDD1-ELVDD2.Then, voltage difference △
ELVDD is exported to processing module 12, and processing module 12 obtains sending out OLED pixel normally according to voltage difference △ ELVDD
Real data voltage value Vdata needed for light, real data voltage value Vdata are exported to data line 4, pass through the data line 4
It is provided to the data signal input 32 of pixel circuit 3, for corresponding pixel light emission.
In OLED display, the light emission luminance of each OLED pixel is directly proportional to the electric current for flowing through OLED, for such as Fig. 3
Shown in for OLED pixel circuit, the electric current I for flowing through OLED pixel meets:
I=k (ELVDD-Vdata)2 (1)
Wherein, ELVDD is the supply voltage for being input to OLED pixel circuit, and Vdata is to be input to OLED pixel circuit
Data voltage, k be a constant, the constant depend on OLED pixel circuit driving transistor 30 oneself factor (including driving
The factors such as the channel width-over-length ratio and carrier mobility of transistor 30), after driving transistor 30 is selected, parameter k will not
It changes.
From formula (1) as can be seen that flowing through the electric current I of OLED pixel and being input to the supply voltage of OLED pixel circuit
The difference of both ELVDD, and the data voltage Vdata that is input to OLED pixel circuit are related.Therefore, the embodiment of the present invention is logical
It crosses and the luminance compensation unit 1 including the first difference calculating module 11 and processing module 12 is provided, enable the first difference calculating module 11
It is connected with the power supply signal input 31 of the output end of power module 2 and pixel circuit 3, passes through the first difference calculating module 11
The voltage difference △ ELVDD between the output end of power module 2 and the power supply signal input of pixel circuit 3 is calculated, then
Real data electricity needed for making OLED pixel carry out normal luminous is obtained according to voltage difference △ ELVDD using processing module 12
Pressure value Vdata.That is, luminance compensation unit 1 provided in an embodiment of the present invention is calculated by the first difference calculating module 11
Then the pad value is fed back to processing module 12 by pad value of the power supply signal on power signal line 5 out, make processing module 12
According to the pad value, the decaying that can compensate for power supply signal is obtained, real data voltage needed for making OLED pixel normal luminous
Value Vdata, and obtained real data voltage value Vdata is provided to data line 4, to compensate due on power signal line 5
The brightness decay of OLED pixel caused by pressure drop enables OLED pixel normal luminous.
Specifically, as shown in figure 4, Fig. 4 is the luminance compensation list of another OLED pixel provided in an embodiment of the present invention
Member is used for the schematic diagram of display panel, wherein above-mentioned processing module 12 includes the second difference calculating module 121；Second difference meter
The first input end for calculating module 121 is electrically connected with the output end of the first difference calculating module 11；Second difference calculating module 121
Second input terminal is for receiving current data voltage value Vdata '；4 electricity of output end and data line of second difference calculating module 121
Connection；Second difference calculating module 121 is used to calculate the difference △ of current data voltage value Vdata ' and voltage difference △ ELVDD
Vdata, wherein △ Vdata=Vdata '-△ ELVDD, and using difference △ Vdata as make OLED pixel carry out normal luminous
Required real data voltage value Vdata, is supplied to data line 4.
For example, when OLED pixel shines, it is assumed that need to make the light emission luminance L1 of OLED pixel, it is corresponding to flow through OLED
The electric current of pixel is I1, should receive 15V according to the power supply signal input 31 that pixel circuit 3 is calculated in above-mentioned formula (1)
Supply voltage, data signal input 32 should receive the data voltage of 10V, then, I1=available according to formula (1)
25k.Therefore, it in design, needs that power module 2 is made to provide the supply voltage of 15V, that is, make the electricity of the output end of power module 2
Source voltage ELVDD1 is 15V, and current data voltage value Vdata ' is 10V.But depositing due to the line impedance of power signal line 5
, when the supply voltage ELVDD1 of the output end of power module 2 is 15V, the reception of power supply signal input 31 of pixel circuit 3
To supply voltage ELVDD2 decay to 12V.At this point, if still to data line 4 according to the current data voltage value of 10V
Vdata ' provides data voltage, then can be calculated by above-mentioned formula (1) then flow through the electric current I2 ' of OLED pixel=
k(12-10)2=4k < I1=25k makes the light emission luminance of OLED pixel be affected.And the embodiment of the present invention passes through the first difference
The voltage difference between the output end of power module 2 and the power supply signal input 31 of pixel circuit 3 is calculated in computing module 11
Value △ ELVDD is 3V, then obtains current data voltage value Vdata ' and voltage difference △ by the second difference calculating module 121
The difference △ Vdata of ELVDD, wherein then △ Vdata=Vdata '-△ ELVDD=7V makees obtained difference △ Vdata
It exports for real data voltage value Vdata to data line 4, at this time by above-mentioned formula (1) it can be concluded that flowing through OLED pixel
Electric current I2=k (12-7)2=25k=I1, that is, compensate for the OLED pixel due to caused by the pressure drop on power signal line 5
Brightness decay enables OLED pixel normal luminous.Also, in the process, above-mentioned each voltage difference is with analog signal
Formal layout and transmit, after real data voltage value Vdata is calculated, the value is directly transmitted to data line 4 and is used for
The display of OLED pixel is driven, to compensate the decaying of the power supply signal on power signal line 5, which needs not move through voltage-ash
Rank and grayscale-voltage Mapping and Converting can be improved to calculate the appearance of error during also avoiding Mapping and Converting
The luminance compensation precision of OLED pixel.
Alternatively, above-mentioned treatment process can also be carried out when the brightness to OLED pixel compensates with digital signal form,
The luminance compensation unit 1 can be so integrated in existing IC in display panel, enable entire luminance compensation process by IC
Record and storage.Specifically, as shown in figure 5, Fig. 5 is the luminance compensation list of another OLED pixel provided in an embodiment of the present invention
Member is used for the schematic diagram of display panel, wherein processing module 12 includes mapping block 122 and third difference calculating module 123；It reflects
Penetrate the input terminal of module 122 and the output end of the first difference calculating module 11 and the output end of third difference calculating module 123 electricity
Connection, the output end of mapping block 122 are electrically connected with the first input end 1231 of third difference calculating module 123 and data line 4；
Second input terminal of third difference calculating module 123 is for receiving current gray value G '.
The mapping relations of grayscale and data voltage are set in mapping block 122, it can be by the data electricity of analog signal form
The grayscale of pressure and digital signal form corresponds, and realizes grayscale-data voltage and the mutual conversion of data voltage-grayscale.
Specifically, in embodiments of the present invention, mapping block 122 is used for the voltage difference △ ELVDD according to analog signal form, and
The mapping relations of grayscale and data voltage obtain the grey scale △ G of digital signal form corresponding with voltage difference △ ELVDD.
Third difference calculating module 123 is used to obtain actual gray value G according to current gray value G ' and grey scale △ G.Then, it maps
Module 122 is also used to be obtained according to the actual gray value G and grayscale of digital signal form and the mapping relations of data voltage
The real data voltage value Vdata of analog signal form corresponding with actual gray value G, later, the reality of the analog signal form
Border data voltage Vdata is exported to data line 4, and OLED pixel is driven to be shown.
Illustratively, by taking the display of 8bit as an example, which can show 28=256 luminance levels, i.e., 0~
255 totally 256 grayscale.The embodiment of the present invention makes the luminance compensation unit 1 equally can by utilizing mapping block 122 twice
Realize the purpose that the decaying of power supply signal is compensated by data voltage.Also, because the process is by digital signal form
Grayscale processing, therefore the luminance compensation unit 1 can be integrated in display panel in existing IC, make the compensation process
It can be recorded and stored by IC.
Specifically, above-mentioned mapping block 122 further includes interpolation arithmetic module；In this way, the grayscale set in mapping block 122
In the limited situation of the sample size that mapping relations with data voltage include, the interpolation calculation module can use, according to any
Voltage difference △ ELVDD and the mapping relations of grayscale and data voltage obtained and voltage difference △ by interpolation arithmetic
The corresponding ash scale △ G of ELVDD；Also, the interpolation calculation module is also used to according to arbitrary actual gray value G and grayscale
Real data voltage value Vdata corresponding with actual gray value G is obtained by interpolation arithmetic with the mapping relations of data voltage.
Illustratively, above-mentioned first difference calculating module 11, the second difference calculating module 121 and third difference calculating module
123 can select difference amplifier to realize.
Voltage prison can be set in the output end of above-mentioned power module 2 and the power supply signal input 31 of pixel circuit 3
Device is controlled, with the voltage value at this both ends of real-time detection, and the realization pair of luminance compensation unit 1 provided through the embodiment of the present invention
The real-time compensation of the brightness of OLED pixel.
It should be noted that in the luminance compensation unit 1 work, if the first difference calculating module 11 calculates power supply mould
When the voltage difference △ ELVDD of the power supply signal input 31 of the output end and pixel circuit 3 of block 2 is 0, that is, work as power supply signal
When there is no the decaying of power supply signal to generate on line, without carrying out luminance compensation to the OLED pixel, at this point, the current data of input
Voltage value Vdata ' is real data voltage value Vdata needed for making OLED pixel carry out normal luminous.
The embodiment of the invention also provides a kind of luminance compensation methods of OLED pixel, and as shown in Figure 2 and Figure 6, Fig. 6 is this
A kind of flow diagram of the luminance compensation method for OLED pixel that inventive embodiments provide, the luminance compensation method include:
Step S1: power module 2 is to 3 output supply voltage of pixel circuit；
Step S2: the voltage difference between the output end of power module 2 and the power supply signal input 31 of pixel circuit 3 is calculated
Value △ ELVDD；
Step S3: according to voltage difference △ ELVDD, real data voltage value Vdata is obtained；
Step S4: real data voltage value Vdata is exported to data line 4；
Step S5: data line 4 exports real data voltage value Vdata to the data signal input 32 of pixel circuit 3.
The luminance compensation method of OLED pixel provided in an embodiment of the present invention, the first output end by calculating power module
Voltage difference △ ELVDD between the power supply signal input of pixel circuit, then obtains according to voltage difference △ ELVDD
Real data voltage value Vdata needed for making OLED pixel normal luminous.That is, the embodiment of the present invention is by calculating electricity
Pad value of the source signal on power signal line 5 obtains can compensate for part decaying, makes OLED then according to the pad value
Real data voltage value Vdata needed for pixel normal luminous, and obtained real data voltage value Vdata is provided to data
Line 4 enables OLED pixel just to compensate the brightness decay of the OLED pixel due to caused by the pressure drop on power signal line 5
Often shine.
Illustratively, as shown in fig. 7, Fig. 7 is the luminance compensation side of another OLED pixel provided in an embodiment of the present invention
The flow diagram of method, wherein above-mentioned steps S3 obtains real data voltage value Vdata according to voltage difference △ ELVDD, packet
It includes:
Step S31: using voltage difference △ ELVDD as data voltage offset △ Vdata；
Step S32: the difference of current data voltage value Vdata ' and data voltage compensation value △ Vdata are calculated, and will be poor
Value is used as real data voltage value Vdata.
It implements process, and detailed description has been carried out in luminance compensation unit part above-mentioned, no longer superfluous herein
It states.
Alternatively, as shown in figure 8, Fig. 8 is the luminance compensation method of another OLED pixel provided in an embodiment of the present invention
Flow diagram, wherein above-mentioned steps S3: according to voltage difference △ ELVDD, real data voltage value Vdata is obtained, comprising:
Step S31 ': it according to the mapping relations of voltage difference △ ELVDD and grayscale and data voltage, obtains and voltage
The corresponding ash scale △ G of difference △ ELVDD；
Step S32 ': according to current gray value G ' and grey scale △ G, actual gray value G is obtained；
Step S33 ': it according to the mapping relations of actual gray value G and grayscale and data voltage, obtains and actual gray
The corresponding real data voltage value Vdata of value G.
Specifically, above-mentioned steps S31 ', according to the mapping relations of voltage difference △ ELVDD and grayscale and data voltage,
Obtain ash scale △ G corresponding with voltage difference △ ELVDD, comprising:
It is obtained according to the mapping relations of voltage difference △ ELVDD and grayscale and data voltage by interpolation arithmetic
To ash scale △ G corresponding with voltage difference △ ELVDD；
Above-mentioned steps S33 ': it according to the mapping relations of actual gray value G and grayscale and data voltage, obtains and reality
The corresponding real data voltage value Vdata of grayscale value G, comprising:
According to the mapping relations of actual gray value G and grayscale and data voltage, by interpolation arithmetic, obtain and reality
The corresponding real data voltage value Vdata of grayscale value.
The embodiment of the invention also provides a kind of display panels, as shown in figure 9, Fig. 9 is provided in an embodiment of the present invention one
The schematic diagram of kind display panel, which includes: power module 2, multiple pixel circuits 3, multiple data lines 4, Yi Jiduo
A above-mentioned luminance compensation unit 1.
Wherein, the output end of power module 2 is electrically connected with the power supply signal input of pixel circuit 3, data line 4 and pixel
The data signal input of circuit 3 is electrically connected；The input terminal of luminance compensation unit 1 respectively with the output end of power module 2 and every
The power supply signal input of a pixel circuit 3 is electrically connected, and the output end of luminance compensation unit 1 is electrically connected with data line 4.Brightness is mended
The specific structure for repaying unit 1 is described in detail in the above-described embodiments, and details are not described herein again.
When the display panel is worked, power module 2 provides power supply signal to each pixel circuit 3, specifically, should
Power supply signal is provided to the power supply signal input of each pixel circuit 3 through power signal line 5 from power module 2.Luminance compensation
The first difference calculating module 11 in unit 1 is by calculating the output end of power module 2 and the power supply signal of each pixel circuit 3
Voltage difference △ ELVDD between input terminal, then processing module 12 obtains making OLED pixel according to voltage difference △ ELVDD
Real data voltage value Vdata needed for carrying out normal luminous.That is, display panel provided in an embodiment of the present invention, leads to
It crosses and is respectively provided with above-mentioned luminance compensation unit 1 between power module 2 and each pixel circuit 3, work in this way in the display panel
When, decaying of the power supply signal on power signal line 5 is calculated using the first difference calculating module 11 by luminance compensation unit 1
Value, then feeds back to processing module 12 for the pad value, makes processing module 12 according to the pad value, obtains can compensate for power supply letter
Number decaying, real data voltage value Vdata needed for making each OLED pixel normal luminous, and by obtained real data electricity
Pressure value Vdata is provided to data line 4, to compensate the bright of each OLED pixel due to caused by the pressure drop on power signal line 5
Degree decaying, to enable the display panel normal luminous.
Also, display panel provided in an embodiment of the present invention makes the display panel not by the way that luminance compensation unit 1 is arranged
It, can be by the compensation of luminance compensation unit 1 due to power supply by single sub-pixel for emitting light, or in multiple sub-pixel for emitting light
Caused by the decaying of signal the phenomenon that sub-pixel for emitting light brightness decay, it ensure that the light emission luminance of the display panel can not be by
The influence of power supply signal decaying.In addition to this, display panel provided in an embodiment of the present invention, by the way that luminance compensation unit 1 is arranged
Luminance compensation is carried out to OLED pixel, gamma value of the display panel when showing each color can be made to tend towards stability, avoided out
The phenomenon that now monochromatic gamma curve of the display panel as caused by the decaying of power supply signal is unsatisfactory for standard gamma curve.
Illustratively, as shown in figure 9, for the multiple luminance compensation units 1 being electrically connected with same data line 4,
This multiple luminance compensation unit 1 includes multiple first difference calculating modules 11, the output of this multiple first difference calculating module 11
End is electrically connected to the same processing module 12.That is, for the multiple pixel circuits 3 being electrically connected with same data line 4
For, in multiple luminance compensation units 1 that setting is electrically connected with these pixel circuits 3, this multiple luminance compensation list can be made
Member 1 shares a processing module 12.In this way, in the course of work of the display panel, due to what is be connected with same data line 4
This multiple 3 timesharing of pixel circuit receives data-signal, and therefore, the embodiment of the present invention can use each first difference calculating module
11 calculate multiple voltage differences between the output end of power module 2 and the power supply signal input 31 of each pixel circuit 3
△ ELVDD, when 12 timesharing of processing module receives the current data voltage value Vdata ' for making each pixel circuit 3 work required,
Can according to above-mentioned multiple voltage difference △ ELVDD, calculate separately to obtain make each OLED pixel normal luminous needed for reality
Then this obtained multiple real data voltage value Vdata timesharing are provided to data line 4 by border data voltage Vdata, to mend
The brightness decay for repaying each OLED pixel due to caused by the pressure drop on power signal line 5 keeps the display panel normal
It shines.Also, so set, the number of elements added in display panel can be reduced, reduce the border width of display panel.
It should be noted that succinct for picture, illustrated only in Fig. 9 be electrically connected with two column pixel circuits 3 it is bright
Compensating unit 1 is spent, in fact, being provided between power module 2 and each pixel circuit 3 above-mentioned in the display panel
Luminance compensation unit 1.
The embodiment of the invention also provides a kind of display devices, and as shown in Figure 10, Figure 10 is provided in an embodiment of the present invention
A kind of schematic diagram of display device, the display device include above-mentioned display panel 100.Wherein, the specific knot of display panel 100
Structure is described in detail in the above-described embodiments, and details are not described herein again.Certainly, display device shown in Fig. 10 is only
Schematically illustrate, which can be any such as mobile phone, tablet computer, laptop, electric paper book or television set
Electronic equipment having a display function.
Display device provided in an embodiment of the present invention includes the bright of the first difference calculating module and processing module by being arranged
Compensating unit is spent, the power supply signal input of the output end and pixel circuit that enable the first difference calculating module and power module is homogeneous
Even, it is calculated by the first difference calculating module between the output end of power module and the power supply signal input of pixel circuit
Then voltage difference △ ELVDD obtains real data voltage value according to voltage difference △ ELVDD using processing module.Also
It is to say, the luminance compensation unit in display device provided in an embodiment of the present invention calculates electricity by the first difference calculating module
Pad value of the source signal on power signal line, then feeds back to processing module for the pad value, processing module is made to be declined according to this
Depreciation obtains the real data voltage value Vdata that can compensate for part decaying, and the real data voltage value that will be obtained
Vdata is provided to data line, to compensate the brightness decay of the OLED pixel due to caused by the pressure drop on power signal line, makes this
Display device being capable of normal luminous.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (11)
1. a kind of luminance compensation unit of OLED pixel, which is characterized in that the luminance compensation unit and power module and pixel
Circuit electrical connection, the luminance compensation unit include:
First difference calculating module, the first input end of first difference calculating module and the output end electricity of the power module
Connection, the second input terminal of first difference calculating module are electrically connected with the power supply signal input of the pixel circuit, institute
The first difference calculating module is stated for calculating the output end of the power module and the power supply signal input of the pixel circuit
Between voltage difference △ ELVDD；
Processing module, the input terminal of the processing module are electrically connected with the output end of first difference calculating module, the place
The output end of reason module is electrically connected with data line, and the processing module is used to obtain reality according to the voltage difference △ ELVDD
Data voltage Vdata.
2. luminance compensation unit according to claim 1, which is characterized in that the processing module is calculated including the second difference
Module；The first input end of second difference calculating module is electrically connected with the output end of first difference calculating module；Institute
The second input terminal of the second difference calculating module is stated for receiving current data voltage value Vdata '；Second difference calculates mould
The output end of block is electrically connected with the data line；
Second difference calculating module is used to calculate the difference of current data voltage value Vdata ' and the voltage difference △ ELVDD
Value, and take the difference as the real data voltage value Vdata.
3. luminance compensation unit according to claim 1, which is characterized in that the processing module includes mapping block and
Three difference calculating modules；The input terminal of the mapping block and the output end of first difference calculating module and the third are poor
It is worth the output end electrical connection of computing module, the first input of the output end of the mapping block and the third difference calculating module
End and data line electrical connection；Second input terminal of the third difference calculating module is for receiving current gray value；
The mapping relations of grayscale and data voltage are set in the mapping block；The mapping block is used for according to the voltage difference
The mapping relations of △ ELVDD and grayscale and data voltage obtain grayscale corresponding with the voltage difference △ ELVDD
Difference；
The third difference calculating module is used to obtain actual gray value according to the current gray value and the grey scale；
The mapping block is also used to the mapping relations according to the actual gray value and grayscale and data voltage, obtains
To the real data voltage value Vdata corresponding with actual gray value.
4. luminance compensation unit according to claim 3, which is characterized in that the mapping block further includes interpolation arithmetic mould
Block；
The interpolation calculation module is used for the mapping according to the voltage difference △ ELVDD and grayscale and data voltage
Relationship obtains the grey scale corresponding with the voltage difference △ ELVDD by interpolation arithmetic；
The interpolation calculation module is also used to be closed according to the mapping of the actual gray value and grayscale and data voltage
System, by interpolation arithmetic, obtains the real data voltage value Vdata corresponding with the actual gray value.
5. a kind of luminance compensation method of OLED pixel, which is characterized in that the luminance compensation method includes:
Power module is to pixel circuit output voltage；
Calculate the voltage difference △ between the output end of the power module and the power supply signal input of the pixel circuit
ELVDD；
According to the voltage difference △ ELVDD, real data voltage value Vdata is obtained；
The real data voltage value Vdata is exported to data line；
The data line exports the real data voltage value Vdata to the pixel circuit.
6. luminance compensation method according to claim 5, which is characterized in that
According to the voltage difference △ ELVDD, real data voltage value Vdata is obtained, comprising:
Using the voltage difference △ ELVDD as data voltage offset △ Vdata；
The difference of current data voltage value Vdata ' and the data voltage offset △ Vdata are calculated, and the difference is made
For the real data voltage value Vdata.
7. luminance compensation method according to claim 5, which is characterized in that
According to the voltage difference △ ELVDD, real data voltage value Vdata is obtained, comprising:
According to the voltage difference △ ELVDD and the mapping relations of grayscale and data voltage, obtain and the voltage difference △
The corresponding grey scale of ELVDD；
According to current gray value and the grey scale, actual gray value is obtained；
According to the mapping relations of the actual gray value and grayscale and data voltage, obtain and the actual gray value
The corresponding real data voltage value Vdata.
8. luminance compensation method according to claim 7, which is characterized in that according to the voltage difference △ ELVDD, and
The mapping relations of grayscale and data voltage obtain grey scale corresponding with the voltage difference △ ELVDD, comprising:
It is obtained according to the mapping relations of the voltage difference △ ELVDD and grayscale and data voltage by interpolation arithmetic
To the grey scale corresponding with the voltage difference △ ELVDD；
According to the mapping relations of the actual gray value and grayscale and data voltage, obtain and the actual gray value
The corresponding real data voltage value Vdata, comprising:
According to the mapping relations of the actual gray value and grayscale and data voltage, by interpolation arithmetic, obtain and institute
State the corresponding real data voltage value Vdata of actual gray value.
9. a kind of display panel, which is characterized in that the display panel includes:
Power module；
Multiple pixel circuits, the output end of the power module are electrically connected with the power supply signal input of the pixel circuit；
Multiple data lines, the data line are electrically connected with the data signal input of the pixel circuit；
Multiple luminance compensation units according to any one of claims 1-4, the input terminal of the luminance compensation unit respectively with
The electrical connection of the power supply signal input of the output end of the power module and each pixel circuit；The luminance compensation unit
Output end be electrically connected with the data line.
10. display panel according to claim 9, which is characterized in that be electrically connected with data line described in same multiple
The luminance compensation unit includes multiple first difference calculating modules；The output end of multiple first difference calculating modules is electrically connected
It is connected to the same processing module.
11. a kind of display device, which is characterized in that the display device includes the display panel as described in claim 9 or 10.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534049A (en) * | 2019-09-10 | 2019-12-03 | 京东方科技集团股份有限公司 | Processing unit and processing method, the display equipment of the operating voltage of luminescent device |
| CN110675817A (en) * | 2019-09-18 | 2020-01-10 | 广东晟合技术有限公司 | DDI IR (double diffused infrared) voltage drop compensation method for OLED (organic light emitting diode) panel |
| CN110853573A (en) * | 2019-11-29 | 2020-02-28 | 上海天马微电子有限公司 | Display device and driving method thereof |
| CN111402812A (en) * | 2020-04-27 | 2020-07-10 | 京东方科技集团股份有限公司 | Adjusting module, testing method and display device |
| CN114299877A (en) * | 2021-12-29 | 2022-04-08 | 云谷（固安）科技有限公司 | Brightness compensation method and system of display panel |
| CN116798373A (en) * | 2023-06-30 | 2023-09-22 | 长沙惠科光电有限公司 | Display panel and display control method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| CN106128359A (en) * | 2016-09-06 | 2016-11-16 | 昆山国显光电有限公司 | OLED display device and luminance compensation method thereof |
| CN106920524A (en) * | 2017-04-12 | 2017-07-04 | 深圳市华星光电技术有限公司 | Display panel and driving method |
| CN107039001A (en) * | 2017-05-31 | 2017-08-11 | 武汉天马微电子有限公司 | Gray scale compensation circuit and gray level compensation method |
| CN206628250U (en) * | 2016-12-27 | 2017-11-10 | 北京集创北方科技股份有限公司 | Organic electroluminescence display device and method of manufacturing same |
| CN107665666A (en) * | 2017-10-31 | 2018-02-06 | 京东方科技集团股份有限公司 | The gamma electric voltage bearing calibration of display module and system |
| CN108039146A (en) * | 2018-01-02 | 2018-05-15 | 京东方科技集团股份有限公司 | A kind of driving method of image element circuit, driving device and display device |
| US10049615B2 (en) * | 2015-09-24 | 2018-08-14 | Samsung Display Co., Ltd. | Degradation compensating device and display device having the same |
-
2018
- 2018-09-12 CN CN201811061897.3A patent/CN109119022A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976546A (en) * | 2010-10-19 | 2011-02-16 | 友达光电股份有限公司 | Pixel circuits with power voltage drop compensation functions and luminous panel |
| US10049615B2 (en) * | 2015-09-24 | 2018-08-14 | Samsung Display Co., Ltd. | Degradation compensating device and display device having the same |
| CN106128359A (en) * | 2016-09-06 | 2016-11-16 | 昆山国显光电有限公司 | OLED display device and luminance compensation method thereof |
| CN206628250U (en) * | 2016-12-27 | 2017-11-10 | 北京集创北方科技股份有限公司 | Organic electroluminescence display device and method of manufacturing same |
| CN106920524A (en) * | 2017-04-12 | 2017-07-04 | 深圳市华星光电技术有限公司 | Display panel and driving method |
| CN107039001A (en) * | 2017-05-31 | 2017-08-11 | 武汉天马微电子有限公司 | Gray scale compensation circuit and gray level compensation method |
| CN107665666A (en) * | 2017-10-31 | 2018-02-06 | 京东方科技集团股份有限公司 | The gamma electric voltage bearing calibration of display module and system |
| CN108039146A (en) * | 2018-01-02 | 2018-05-15 | 京东方科技集团股份有限公司 | A kind of driving method of image element circuit, driving device and display device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534049A (en) * | 2019-09-10 | 2019-12-03 | 京东方科技集团股份有限公司 | Processing unit and processing method, the display equipment of the operating voltage of luminescent device |
| CN110675817A (en) * | 2019-09-18 | 2020-01-10 | 广东晟合技术有限公司 | DDI IR (double diffused infrared) voltage drop compensation method for OLED (organic light emitting diode) panel |
| CN110853573A (en) * | 2019-11-29 | 2020-02-28 | 上海天马微电子有限公司 | Display device and driving method thereof |
| CN111402812A (en) * | 2020-04-27 | 2020-07-10 | 京东方科技集团股份有限公司 | Adjusting module, testing method and display device |
| CN114299877A (en) * | 2021-12-29 | 2022-04-08 | 云谷（固安）科技有限公司 | Brightness compensation method and system of display panel |
| CN116798373A (en) * | 2023-06-30 | 2023-09-22 | 长沙惠科光电有限公司 | Display panel and display control method |
| CN116798373B (en) * | 2023-06-30 | 2024-05-28 | 长沙惠科光电有限公司 | Display panel and display control method |
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