CN104318900A - Organic electroluminescence display device and method - Google Patents

Organic electroluminescence display device and method Download PDF

Info

Publication number
CN104318900A
CN104318900A CN201410658426.6A CN201410658426A CN104318900A CN 104318900 A CN104318900 A CN 104318900A CN 201410658426 A CN201410658426 A CN 201410658426A CN 104318900 A CN104318900 A CN 104318900A
Authority
CN
China
Prior art keywords
display data
gtg
image element
element circuit
gray scale
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201410658426.6A
Other languages
Chinese (zh)
Other versions
CN104318900B (en
Inventor
吴仲远
宋丹娜
曾思衡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN201410658426.6A priority Critical patent/CN104318900B/en
Publication of CN104318900A publication Critical patent/CN104318900A/en
Application granted granted Critical
Publication of CN104318900B publication Critical patent/CN104318900B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the invention provides an organic electroluminescence display device and method used for improving the uniformity of the brightness of an image in a display area of the display device. A gray scale compensation lookup table comprising a corresponding relationship between gray scale compensation parameters and addressing addresses of pixel circuits located on a display panel is stored, and the gray scale compensation parameters comprise monomial coefficients and constants. The method comprises the steps that a display data gray scale is received, the addressing address of the pixel circuit to which the display data gray scale is about to be input is determined, and the gray scale compensation parameter corresponding to the determined addressing address is obtained from a storer; compensation is carried out on the received display data gray scale according to the obtained gray scale compensation parameter, the compensated display data gray scale is output, and the compensated display data gray scale is obtained by multiplying the received display data gray scale by the monomial coefficient in the determined gray scale compensation parameter and adding the constant in the determined gray scale compensation parameter; the compensated display data gray scale is converted into an analog data signal to carry out control over a display picture.

Description

A kind of organic electroluminescence display device and method of manufacturing same and method
Technical field
The present invention relates to organic light emission technical field, particularly relate to a kind of organic electroluminescence display device and method of manufacturing same and method.
Background technology
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) is applied in Performance Monitor more and more as a kind of current mode luminescent device.Traditional passive matrix Organic Light Emitting Diode (Passive Matrix OLED, PMOLED) display, along with the increase of display size, needs the driving time of shorter single pixel, thus needs to increase transient current, increases power consumption.The application of big current simultaneously can cause pressure drop on ITO line excessive, and makes OLED operating voltage too high, and then reduces its efficiency.And active matrix organic light-emitting diode (Active Matrix OLED, AMOLED) display to be lined by line scan input OLED electric current by switching tube, can address these problems well.
Drive in type at digital, the current type of AMOLED and voltage-type three kinds, voltage-type driving method and conventional active array liquid crystal display (Active Matrix Liquid Crystal, AMLCD) driving method is similar, a voltage signal representing GTG is provided by driving circuit (IC), this voltage signal can be converted in image element circuit inside the current signal driving thin film transistor (TFT), thus driving OLED realizes intensity gray scale, it is fast that this method has actuating speed, realize simple advantage, be applicable to driving large size panel, extensively adopted by industry.
But, for driving type to be in the displayer of voltage-type, there is backboard viewing area, to be applied to the voltage of each OLED unequal, and then the electric current flowing through each OLED is unequal, cause the current unevenness on backboard even, thus the problem causing brightness of image uneven, concrete reason is analyzed as follows:
The first, AMOLED adopts thin film transistor (TFT) (TFT) to build image element circuit for OLED and provides corresponding electric current.Adopt low-temperature polysilicon film transistor (LTPS TFT) or oxide thin film transistor (Oxide TFT) more, compared with general amorphous silicon film transistor (amorphous-Si TFT), LTPS TFT and Oxide TFT has higher mobility and more stable characteristic, is more suitable for being applied in AMOLED display.But due to the limitation of crystallization process, the LTPS TFT that large-area glass substrate makes, usually on the such as electrical parameter such as threshold voltage, mobility, there is heterogeneity, this heterogeneity can be converted into current difference and the luminance difference of OLED, and by the perception of human eye institute, i.e. moire (mura) phenomenon.Although the homogeneity of Oxide TFT technique is better, but it is similar with a-Si TFT, under long-time pressurization and high temperature, its threshold voltage there will be drift, because display frame is different, the threshold drift amount of panel each several part TFT is different, cause the electric current of the OLED flowing through each several part different, and then display brightness difference can be caused, due to this species diversity with show before image-related, therefore be often rendered as ghost phenomena, below by Fig. 1, the relation between threshold voltage and electric current be described.
Fig. 1 is voltage driven type image element circuit structure (2T1C) schematic diagram of traditional employing 2 TFT transistors 1 electric capacity composition.Wherein the data voltage on data line is transferred to the grid of driving tube T2 by switch transistor T 1, and this data voltage is converted into corresponding electric current supply OLED by driving tube T2.When normally working, driving tube T2 should be in saturation region, within the sweep time of a line, provide steady current.Its electric current can be expressed as:
I OLED = 1 2 μ n · Cox · W L · ( Vdata - Voled - Vyhn ) 2 = 1 2 μ n · Cox · W L · ( Vgs - Vthn ) - - - ( 1 )
Wherein μ nfor carrier mobility, C oXfor gate oxide capacitance, W/L is transistor breadth length ratio, Vdata is data voltage, and Voled is OLED operating voltage, for all pixel cells are shared, Vthn is the threshold voltage of transistor, Vgs is the gate source voltage of transistor, for enhancement mode TFT, Vthn be on the occasion of, be negative value for depletion type TFT, Vthn.From above formula (1), if the Vthn between different pixels unit is different, then electric current there are differences.If the Vthn of pixel drifts about in time, then first after-current may be caused different, cause ghost.And cause OLED operating voltage different due to OLED heterogeneity, also can cause current difference.
Second, in large scale display application, because backboard power lead exists certain resistance, and the drive current of all pixels is all provided by ARVDD, therefore compare from for electric position near the supply voltage of the ARVDD Power supply band of position in backboard and want high compared with the supply voltage of far region, this phenomenon is called as IR pressure drop (Drop).Because the voltage of ARVDD is relevant to electric current, IR Drop also can cause the current difference of zones of different, and then produces mura when showing.Adopt the LTPS technique of P-Type TFT structure pixel cell especially responsive to this problem, because its memory capacitance is connected between ARVDD and TFT grid, the voltage of ARVDD changes, and directly can affect the Vgs of drive TFT.
3rd, the heterogeneity that OLED also can cause electric property when evaporation because thickness is uneven.For a-Si or the Oxide TFT technique adopting N-Type TFT to build pixel cell, its memory capacitance is connected between drive TFT grid and OLED anode, when data voltage is transferred to grid, if each pixel OLED anode voltage is different, then the Vgs of actual loaded on TFT is different, thus drive current difference causes display brightness difference.
Summary of the invention
The embodiment of the present invention provides a kind of organic electroluminescence display device and method of manufacturing same and method, in order to improve the homogeneity of display device viewing area brightness of image.
The organic electroluminescence display device and method of manufacturing same that the embodiment of the present invention provides and method specific as follows:
A kind of organic electroluminescence display device and method of manufacturing same, comprising:
Storer, for storing gray scale compensation look-up table, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
Gray scale compensation module, for receiving display data GTG, determines the addressable address of the image element circuit that the display data GTG received will input, and obtains the gray scale compensation parameter that the described addressable address determined is corresponding from described storer; According to the gray scale compensation parameter obtained, the described display data GTG received is compensated, and exporting the display data GTG after compensating, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Data-driven module, for being converted to analog data signal by the display data GTG after compensation;
Display panel, for receiving described analog data signal, and shows corresponding picture according to described analog data signal.
In the scheme of the embodiment of the present invention, due to the corresponding relation of the addressable address and gray scale compensation parameter that store each image element circuit on display panel in advance, and compensate according to the display data GTG of this corresponding relation to each image element circuit of input, therefore, when making the display data GTG of input identical, the electric current flowing through the driving transistors of each image element circuit is identical, when making each image element circuit luminescent device identical, flow through each image element circuit luminescent device glow current identical, also the brightness of the image of i.e. display panel display is identical, improve the homogeneity of display device viewing area brightness of image.
Preferably, described organic electroluminescence display device and method of manufacturing same also comprises: gray scale compensation parameter determination module and control module;
Gray scale compensation parameter determination module, for when receiving from control module control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets;
Control module, for transmitting control signal to gray scale compensation parameter determination module, and the gray scale compensation parameter of each image element circuit utilizing gray scale compensation parameter determination module to determine upgrades the gray scale compensation look-up table stored in described storer.
Preferably, described data-driven module, also for respectively the first display data GTG after first of input the display data GTG or adjustment being converted to the first analog data signal, the second display data GTG after second of input the display data GTG or adjustment is converted to the second analog data signal;
Described display panel, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Described gray scale compensation parameter determination module, specifically comprises: comparing unit, GTG adjustment unit, trigger element, determining unit and arithmetic element;
Comparing unit, for for arbitrary image element circuit, the described first object current value of the value of the first analog current signal of this image element circuit received from data-driven module and setting is compared, described second target current value of the value of the second analog current signal of this image element circuit received from data-driven module and setting is compared, and comparative result is exported to GTG adjustment unit and trigger element;
GTG adjustment unit, for the first display data GTG and the second display data GTG are exported to data-driven module, and according to the comparative result received, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, the first display data GTG after being adjusted, and the first display data GTG after adjustment is exported to data-driven module, and adjustment inputs the display data GTG of each image element circuit on the basis of the second display data GTG, the second display data GTG after being adjusted, and the second display data GTG after adjustment is exported to data-driven module and determining unit,
Trigger element, for for arbitrary image element circuit, when the comparative result of this image element circuit that this receives is not identical with the comparative result of this image element circuit that last time receives, sends the trigger pip for this image element circuit to determining unit;
Determining unit, for when according to the comparative result received, on the first display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When according to the comparative result received, on the second display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
Arithmetic element, for for arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, determining unit show data GTG for the first object that this image element circuit is determined and the second target shows gray scale compensation parameter k and the b that data GTG determines this image element circuit.
Preferably, described data-driven module, also for respectively first of input the display data GTG being converted to the first analog data signal, is converted to the second analog data signal by second of input the display data GTG;
Described display panel, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Described gray scale compensation parameter determination module, specifically comprises: input block, AD conversion unit, subtracter, look-up table unit, totalizer, storage unit and arithmetic element;
Described input block, for exporting to data-driven module by the first display data GTG and the second display data GTG;
AD conversion unit, exports to subtracter for the first analog current signal is converted to the first digital current signal, the second analog current signal is converted to the second digital current signal and exports to subtracter;
Subtracter, for for arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment, the first current increment and the second current increment are exported to look-up table unit;
Look-up table unit, for for arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding, and the first GTG increment determined and the second GTG increment are exported to totalizer;
Totalizer, for for arbitrary image element circuit, first display data GTG and the first GTG increment are added and obtain first object display data GTG and export to storage unit, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and export to storage unit;
Storage unit, for for arbitrary image element circuit, stores first object display data GTG and the second target display data GTG of this image element circuit;
Arithmetic element, for for arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit of cell stores 1'=k × G 1+ b, G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
Preferably, described image element circuit comprises: the first transistor, transistor seconds, third transistor, electric capacity and luminescent device;
The first transistor, its first end is connected with data line, and its control end is connected with grid line, and its second end is connected with the control end of transistor seconds, under the Control of Voltage on grid line, utilizes the analog data signal on data line to be capacitor charging;
Transistor seconds, its control end is connected with the first end of electric capacity, its first end is connected with the first reference voltage, and its second end is connected with the second end of electric capacity, for driving luminescent device luminous according to the sparking voltage of the first reference voltage and electric capacity that are carried in its first end;
Luminescent device, its first end is connected with the second end of electric capacity, and its second end is connected with the second reference voltage;
Third transistor, its control end is connected with grid line, and its first end is connected with the first end of luminescent device, and its second end is connected with gray scale compensation parameter determination module, for exporting the electric current flowing through luminescent device to gray scale compensation parameter determination module.
A kind of ORGANIC ELECTROLUMINESCENCE DISPLAYS method, comprising:
Receive display data GTG;
Determine the addressable address of image element circuit that the display data GTG received will input, from storer, obtain the gray scale compensation parameter that the described addressable address determined is corresponding; Store gray scale compensation look-up table in described storer, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
According to the gray scale compensation parameter obtained, the described display data GTG received is compensated, display data GTG after being compensated, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Display data GTG after compensating is converted to the control that analog data signal carries out display frame.
In the scheme of the embodiment of the present invention, due to the corresponding relation of the addressable address and gray scale compensation parameter that store each image element circuit on display panel in advance, and compensate according to the display data GTG of this corresponding relation to each image element circuit of input, therefore, when making the display data GTG of input identical, the electric current flowing through the driving transistors of each image element circuit is identical, when making each image element circuit luminescent device identical, flow through each image element circuit luminescent device glow current identical, also the brightness of the image of i.e. display panel display is identical, improve the homogeneity of display device viewing area brightness of image.
Preferably, described method also comprises:
When receiving control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
The gray scale compensation parameter of each image element circuit determined is utilized to upgrade the gray scale compensation look-up table stored in described storer;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets.
Preferably, described for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit, specifically comprises:
Respectively the first display data GTG after first of input the display data GTG or adjustment is converted to the first analog data signal, the second display data GTG after second of input the display data GTG or adjustment is converted to the second analog data signal;
Obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
For arbitrary image element circuit, the described first object current value of the value of the first analog current signal of image element circuit and setting is compared, described second target current value of the value of the second analog current signal of image element circuit and setting is compared, obtains comparative result;
According to described comparative result, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, and the display data GTG adjusting each image element circuit of input on the basis of the second display data GTG;
For arbitrary image element circuit, when comparative result is the display data GTG for each image element circuit of adjustment input on the first display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When comparative result is the display data GTG for each image element circuit of adjustment input on the second display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
For arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, the first object display data GTG determined for this image element circuit and the second target display data GTG determine gray scale compensation parameter k and the b of this image element circuit.
Preferably, described for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit, specifically comprises:
Respectively first of input the display data GTG is converted to the first analog data signal, second of input the display data GTG is converted to the second analog data signal;
Obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
First analog current signal is converted to the first digital current signal, the second analog current signal is converted to the second digital current signal;
For arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment;
For arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding;
For arbitrary image element circuit, the first display data GTG and the first GTG increment are added and obtain first object display data GTG and store, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and store;
For arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit stored 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
Accompanying drawing explanation
Fig. 1 is voltage driven type image element circuit structure (2T1C) schematic diagram of employing 2 TFT transistors 1 electric capacity composition traditional in background technology;
One of structural representation of the organic electroluminescence display device and method of manufacturing same that Fig. 2 provides for the embodiment of the present invention one;
The structural representation two of the organic electroluminescence display device and method of manufacturing same that Fig. 3 provides for the embodiment of the present invention one;
The structural representation of the organic electroluminescence display device and method of manufacturing same that Fig. 4 provides for the embodiment of the present invention two;
The annexation schematic diagram of the image element circuit that Fig. 5 provides for the embodiment of the present invention two and gray scale compensation parameter determination module;
The structural representation of the organic electroluminescence display device and method of manufacturing same that Fig. 6 provides for the embodiment of the present invention three;
The annexation schematic diagram of the image element circuit that Fig. 7 provides for the embodiment of the present invention three and gray scale compensation parameter determination module;
The process flow diagram of the ORGANIC ELECTROLUMINESCENCE DISPLAYS method that Fig. 8 provides for the embodiment of the present invention four;
GTG-map of current before the gray scale compensation that Fig. 9 provides for the embodiment of the present invention;
GTG-map of current after the gray scale compensation that Figure 10 provides for the embodiment of the present invention.
Embodiment
A kind of organic electroluminescence display device and method of manufacturing same that the embodiment of the present invention provides and method, in order to improve the homogeneity of display device viewing area brightness of image.
In order to the scheme of the embodiment of the present invention is clearly described, first the principle of the embodiment of the present invention is described below.
For different image element circuits, driving transistors all works in state of saturation, and the mobility of driving transistors (μ) and threshold voltage (V th) may be all different, but substantially all observing the I-V formula of transistor, the arbitrary gate source voltage V namely for input queued switches transistor has:
I＝K×(V-V th) 2 (2)
In formula (2), I is the leakage current of the driving transistors of this image element circuit, V thbe the threshold voltage of the driving transistors of this image element circuit, K is structural parameters.
Make the brightness of image identical, just need when the display data GTG inputted is identical, the leakage current flowing through the driving transistors of all image element circuits is identical, but, for different image element circuits, expect identical leakage current I, the threshold voltage due to different driving transistorss is V th', structural parameters are K', then the gate source voltage needed is V', also namely:
I＝K'×(V'-V th') 2 (3)
Hypothesis formula (2) be set standard pixel circuit I-V relation (now, Vth road K is known standard figures), (3) formula is the I-V relation of arbitrary image element circuit on display panel, the relation of the gate source voltage that the gate source voltage needed for the image element circuit obtained on display panel and standard pixel circuit need, can substitute into (2) Shi Ke get by (3) formula:
K'×(V'-V th') 2＝K×(V-V th) 2 (4)
Are extracted square root in formula (4) equal sign both sides, obtain:
| V ′ - V th ′ | = K K ′ × | V - V th | - - - ( 5 )
Usual V'-V th' and V-V thbeing and being greater than 0 or be the value being less than 0, when supposing to be the value being greater than 0, obtaining after formula (5) is removed absolute value:
V ′ = K K ′ × ( V- V th ) + V th ′ - - - ( 6 )
In formula (6), V th, K is known standard figures, concerning a specific image element circuit, in certain hour section, K' and V th' be changeless, therefore, can establish in formula (6) wherein, k is a fixed value, and now, formula (6) becomes:
V'＝k×V+(V th'-k×V th) (7)
In formula (7), due to V th', k, V thbe fixed value, therefore, can by V th'-k × V th=b, b are a fixed value, and now formula (7) becomes:
V'＝k×V+b (8)
At hypothesis V'-V th' and V-V thwhen being the value being less than 0, can obtain formula (8) equally, from formula (8), the relationship essence of V and V' is linear relationship, and now, k can be called the Monomial coefficient of this linear relationship, b is called the constant of this linear relationship.
The gate source voltage of driving transistors is determined by the data-signal on input data line in essence, and the data-signal on this input data line is converted by the display data GTG inputted;
If the relation of the data-signal (being alternatively gate source voltage V) on the display data GTG G of input and input data line is adjusted to linearly, then from formula (8):
G'＝k×G+b (9)
Wherein, G is the display data GTG of input, and G' is the display data GTG (also can be described as the display data GTG after the compensation of input) of actual needs, k and b is respectively Monomial coefficient and constant.
In order to obtain k and b of all image element circuits, the first display data GTG G can be set 1with the second display data GTG G 2.For arbitrary image element circuit, in order to k and b and this image element circuit obtaining this image element circuit shows data GTG G first 1under first object current value I 1with the second display data GTG G 2under the second target current value I 2, by changing the display data GTG G' exporting to image element circuit respectively, until the current value obtained and first object current value I 1, record now inputs the first object display data GTG G of this image element circuit 1'; And until the current value that obtains and the second target current value I 2identical, record now inputs the second target display data GTG G of this image element circuit 2', and by G 1, G 1' data to and G 2, G 2' data to substituting into formula (9) respectively, obtain:
G 1'＝k×G 1+b (10)
G 2'＝k×G 2+b (11)
It should be noted that, show data GTG G in setting first 1with the second display data GTG G 2, and set the target current value I under these two GTGs 1and I 2after, need all use this two groups of data (G for each image element circuit of same display panel 1, I 1) and (G 2, I 2) carry out G 1' and G 2' mensuration, can ensure that different pixels circuit is under the prerequisite of the identical display data GTG of input like this, the electric current flowing through the driving thin film transistor (TFT) of all image element circuits after carrying out showing data gray scale compensation is identical, and then the brightness of image is identical.
Utilize formula (10) and formula (11) that the value of k and b of this image element circuit can be solved.By the mark corresponding stored of k and b that obtain and this image element circuit, the follow-up GTG of k and b to input that can utilize compensates, and then export on this data line needing the image element circuit carrying out gray scale compensation to use after the display data GTG after described compensation is converted to analog data signal, all carry out the determination of k and b according to this principle for each image element circuit, and compensate accordingly, different pixels circuit can be realized when the display data GTG inputted is identical, the brightness of the image obtained is substantially identical, improve the homogeneity of display device viewing area brightness of image.
In an embodiment of the present invention, display panel in above-mentioned display device comprises multiple data line being suitable for transmission of data signals, multiple being suitable for transmits the sweep trace selecting signal, multiple image element circuit, the line of induction corresponding to the electric current of data-signal that multiple driving transistors for transmitting image element circuit exports, each image element circuit is connected with one of one of multiple sweep trace, multiple data line and one of multiple line of induction; The plurality of image element circuit can be the image element circuit in background technology, also can be that other comprises the image element circuit of switching tube, driving tube and OLED, not limit here to it.
Below by specific embodiment, the solution of the present invention is described.
Embodiment one
As shown in Figure 2, be a kind of organic electroluminescence display device and method of manufacturing same that the embodiment of the present invention one provides, comprise: storer 21, gray scale compensation module 22, data-driven module 23 and display panel 24; Wherein:
Storer 21, for storing gray scale compensation look-up table, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
Compensating parameter in described storer 21 can be obtain by measuring respectively the image element circuit on display panel; Because As time goes on the threshold voltage of the driving transistors on image element circuit and structural parameters can along with changing, therefore, the gray scale compensation parameter stored in above-mentioned storer upgrades once after can showing predetermined frame number at set intervals or often.
Gray scale compensation module 22, for receiving display data GTG, determines the addressable address of the image element circuit that the display data GTG received will input, and obtains the gray scale compensation parameter that the described addressable address determined is corresponding from described storer; According to the gray scale compensation parameter obtained, the described display data GTG received is compensated, and exporting the display data GTG after compensating, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Wherein, the addressable address of the image element circuit that above-mentioned display data GTG will input can be determine according to the rule of setting, such as: determine according to data line on display panel and the annexation of image element circuit and the Control timing sequence of sweep trace and data line; Because the annexation of image element circuit on display panel and data line is determined, under the effect of the sweep signal of the data-signal in data line on clock signal and grid line, the image element circuit that data-signal will input can be determined exactly, and this image element circuit position on a display panel (being alternatively address) is fixing, therefore, in embodiments of the present invention, receive display data GTG, the addressable address of the image element circuit that these display data will input can be determined.
Data-driven module 23, for being converted to analog data signal by the display data GTG after compensation;
Display panel 24, for receiving described analog data signal, and shows corresponding picture according to described analog data signal.
In the scheme of the embodiment of the present invention one, due to the corresponding relation of the addressable address and gray scale compensation parameter that store each image element circuit on display panel in advance, and compensate according to the display data GTG of this corresponding relation to each image element circuit of input, therefore, when making the display data GTG of input identical, the electric current flowing through the driving transistors of each image element circuit is identical, when making each image element circuit luminescent device identical, flow through each image element circuit luminescent device glow current identical, also the brightness of the image of i.e. display panel display is identical, improve the homogeneity of display device viewing area brightness of image.
Preferably, in order to obtain gray scale compensation parameter, new module can be added on the basis of the organic electroluminescence display device and method of manufacturing same shown in Fig. 2.As shown in Figure 3, described organic electroluminescence display device and method of manufacturing same also comprises: control module 31 and gray scale compensation parameter determination module 32;
Control module 31, for transmitting control signal to gray scale compensation parameter determination module, and the gray scale compensation parameter of each image element circuit utilizing gray scale compensation parameter determination module to determine upgrades the gray scale compensation look-up table stored in described storer;
Gray scale compensation parameter determination module 32, for when receiving from control module control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets.
Gray scale compensation parameter determination module in above-mentioned Fig. 3 has at least two kinds of specific implementations to realize.Below by embodiment two, a kind of implementation is described, by embodiment three, another implementation is described.Current, the embodiment of the present invention is not limited to the two kinds of modes illustrated in embodiment two and embodiment three, any mode that can realize above-mentioned gray scale compensation parameter determination module.
Embodiment two
As shown in Figure 4, be the structural representation of the organic electroluminescence display device and method of manufacturing same in the embodiment of the present invention two; Its display panel 24 comprises multiple data line being suitable for transmission of data signals, multiple being suitable for transmits the sweep trace selecting signal, multiple image element circuit, the line of induction corresponding to the electric current of data-signal that multiple driving transistors for transmitting image element circuit exports, each image element circuit is connected with one of one of multiple sweep trace, multiple data line and one of multiple line of induction; Described gray scale compensation parameter determination module 32, specifically comprises: comparing unit 41, GTG adjustment unit 42, trigger element 43, determining unit 44 and arithmetic element 45; The course of work below by each module illustrates the determination of gray scale compensation parameter.
In order to realize the determination of gray scale compensation parameter, the data-driven module 23 in embodiment one and display panel 24 all will participate in, and need new function to support the determination of gray scale compensation parameter, specific as follows:
Described data-driven module 23, also for respectively the first display data GTG after first of input the display data GTG or adjustment being converted to the first analog data signal, the second display data GTG after second of input the display data GTG or adjustment is converted to the second analog data signal; The major function of data-driven module is here the function of digital to analog converter, therefore, with the addition of digital to analog converter in data-driven module 23 in the diagram;
Described display panel 24, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Comparing unit 41, for for arbitrary image element circuit, the described first object current value of the value of the first analog current signal of this image element circuit received from data-driven module and setting is compared, described second target current value of the value of the second analog current signal of this image element circuit received from data-driven module and setting is compared, and comparative result is exported to GTG adjustment unit and trigger element;
GTG adjustment unit 42, for the first display data GTG and the second display data GTG are exported to data-driven module, and according to the comparative result received, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, the first display data GTG after being adjusted, and the first display data GTG after adjustment is exported to data-driven module, and adjustment inputs the display data GTG of each image element circuit on the basis of the second display data GTG, the second display data GTG after being adjusted, and the second display data GTG after adjustment is exported to data-driven module 23 and determining unit 44,
Trigger element 43, for for arbitrary image element circuit, when the comparative result of this image element circuit that this receives is not identical with the comparative result of this image element circuit that last time receives, the trigger pip (this trigger pip can be rising edge trigger pip, also can be negative edge trigger pip) for this image element circuit is sent to determining unit;
Determining unit 44, for when according to the comparative result received, on the first display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When according to the comparative result received, on the second display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
Arithmetic element 45, for for arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, determining unit show data GTG for the first object that this image element circuit is determined and the second target shows gray scale compensation parameter k and the b that data GTG determines this image element circuit.
In addition, these two modules, with of the prior art identical, are illustrated to be schemes in order to more clearly illustrate in the embodiment of the present invention two by the function of the turntable driving module in Fig. 4 and turntable driving control module in Fig. 4.
Below by Fig. 5, the concrete annexation of image element circuit and gray scale compensation parameter determination module is described.
The annexation of an image element circuit and gray scale compensation parameter determination module is only shown in Fig. 5, dotted line with arrow in Fig. 5 refers to the flow direction of the drain current that driving transistors T2 produces, other image element circuit is similar with the annexation of the image element circuit illustrated and gray scale compensation parameter determination module, repeats no more here.
Image element circuit in Fig. 5 comprises: the first transistor T1, transistor seconds T2, third transistor T3, electric capacity C and luminescent device D;
The first transistor T1, its first end is connected with data line, and its control end is connected with grid line, and its second end is connected with the control end of transistor seconds, under the Control of Voltage on grid line, utilizes the analog data signal on data line to be capacitor charging;
Transistor seconds T2, its control end is connected with the first end of electric capacity, its first end is connected with the first reference voltage, and its second end is connected with the second end of electric capacity, for driving luminescent device luminous according to the sparking voltage of the first reference voltage and electric capacity that are carried in its first end;
Luminescent device D, its first end is connected with the second end of electric capacity, and its second end is connected with the second reference voltage;
Third transistor T3, its control end is connected with grid line, its first end is connected with the first end of luminescent device, its second end is connected with gray scale compensation parameter determination module, for the electric current flowing through luminescent device being exported to gray scale compensation parameter determination module (be specially the comparer of the formation comparing unit in gray scale compensation parameter determination module here, the target current that in Fig. 5, comparer connects can be the first object electric current of setting also can be the second target current set).
Embodiment three
As shown in Figure 6, be the structural representation of the organic electroluminescence display device and method of manufacturing same in the embodiment of the present invention three; Its display panel 24 comprises multiple data line being suitable for transmission of data signals, multiple being suitable for transmits the sweep trace selecting signal, multiple image element circuit, the line of induction corresponding to the electric current of data-signal that multiple driving transistors for transmitting image element circuit exports, each image element circuit is connected with one of one of multiple sweep trace, multiple data line and one of multiple line of induction; Described gray scale compensation parameter determination module 32, specifically comprises: input block 61, AD conversion unit 62, subtracter 63, look-up table unit 64, totalizer 65, storage unit 66 and arithmetic element 67; The course of work below by each module illustrates the determination of gray scale compensation parameter.
In order to realize the determination of gray scale compensation parameter, the data-driven module 23 in embodiment one and display panel 24 all will participate in, and need new function to support the determination of gray scale compensation parameter, specific as follows:
Described data-driven module 23, also for respectively first of input the display data GTG being converted to the first analog data signal, is converted to the second analog data signal by second of input the display data GTG;
Described display panel 24, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Described input block 61, for exporting to data-driven module by the first display data GTG and the second display data GTG;
AD conversion unit 62, exports to subtracter for the first analog current signal is converted to the first digital current signal, the second analog current signal is converted to the second digital current signal and exports to subtracter;
Here AD conversion unit is realized by analog to digital converter.
Subtracter 63, for for arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment, the first current increment and the second current increment are exported to look-up table unit;
The corresponding target current value of each display data GTG, this target current value can be that experiment obtains, and also can be the average to as target current value corresponding to this display data GTG of the current value that all image element circuits are exported under this display data GTG.
Look-up table unit 64, for for arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding, and the first GTG increment determined and the second GTG increment are exported to totalizer;
Totalizer 65, for for arbitrary image element circuit, first display data GTG and the first GTG increment are added and obtain first object display data GTG and export to storage unit, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and export to storage unit;
Storage unit 66, for for arbitrary image element circuit, stores first object display data GTG and the second target display data GTG of this image element circuit;
Arithmetic element 67, for for arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit of cell stores 1'=k × G 1+ b, G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
Below by Fig. 7, the concrete annexation of image element circuit and gray scale compensation parameter determination module is described.
The annexation of an image element circuit and gray scale compensation parameter determination module is only shown in Fig. 7, and other image element circuit is similar with the annexation of the image element circuit illustrated and gray scale compensation parameter determination module, repeats no more here.
Described image element circuit in Fig. 7 comprises: the first transistor T1, transistor seconds T2, third transistor T3, electric capacity C and luminescent device D;
The first transistor T1, its first end is connected with data line, and its control end is connected with grid line, and its second end is connected with the control end of transistor seconds, under the Control of Voltage on grid line, utilizes the analog data signal on data line to be capacitor charging;
Transistor seconds T2, its control end is connected with the first end of electric capacity, its first end is connected with the first reference voltage, and its second end is connected with the second end of electric capacity, for driving luminescent device luminous according to the sparking voltage of the first reference voltage and electric capacity that are carried in its first end;
Luminescent device D, its first end is connected with the second end of electric capacity, and its second end is connected with the second reference voltage;
Third transistor T3, its control end is connected with grid line, its first end is connected with the first end of luminescent device, its second end is connected with gray scale compensation parameter determination module, for the electric current flowing through luminescent device being exported to gray scale compensation parameter determination module (in Fig. 7, concrete connection is the analog to digital converter in gray scale compensation parameter determination module).
It should be noted that, image element circuit shown in Fig. 5 and Fig. 7 is preferred pixel circuit of the present invention, certainly the image element circuit of other structures is also not limited to, when image element circuit is the image element circuit of other structure, only need add third transistor T3 in the image element circuit of other structure, this third transistor T3 control end is connected with grid line, and its first end is connected with the first end of luminescent device, its second end is connected with gray scale compensation parameter determination module, reaches and is exported by the electric current flowing through luminescent device.
Embodiment four
As shown in Figure 8, be the process flow diagram of a kind of ORGANIC ELECTROLUMINESCENCE DISPLAYS method that the embodiment of the present invention four provides, comprise the following steps:
Step 801: receive display data GTG;
Step 802: determine the addressable address of image element circuit that the display data GTG received will input, obtains the gray scale compensation parameter that the described addressable address determined is corresponding from storer; Store gray scale compensation look-up table in described storer, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
Step 803: the described display data GTG received is compensated according to the gray scale compensation parameter obtained, display data GTG after being compensated, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Step 804: the display data GTG after compensating is converted to the control that analog data signal carries out display frame.
Preferably, in order to obtain gray scale compensation parameter, above-mentioned ORGANIC ELECTROLUMINESCENCE DISPLAYS method also comprises following two steps:
The first step: when receiving control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
Second step: utilize the gray scale compensation parameter of each image element circuit determined to upgrade the gray scale compensation look-up table stored in described storer;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets.
Preferably, the above-mentioned first step specifically have following two kinds of implementations, respectively as follows:
The first implementation, comprises the following steps A1 to steps A 6:
Steps A 1: respectively the first display data GTG after first of input the display data GTG or adjustment is converted to the first analog data signal, is converted to the second analog data signal by the second display data GTG after second of input the display data GTG or adjustment;
Steps A 2: obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Steps A 3: for arbitrary image element circuit, the described first object current value of the value of the first analog current signal of image element circuit and setting is compared, described second target current value of the value of the second analog current signal of image element circuit and setting is compared, obtains comparative result;
Steps A 4: according to described comparative result, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, and the display data GTG adjusting each image element circuit of input on the basis of the second display data GTG;
Steps A 5: for arbitrary image element circuit, when comparative result is the display data GTG for each image element circuit of adjustment input on the first display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When comparative result is the display data GTG for each image element circuit of adjustment input on the second display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
Steps A 6: for arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, the first object display data GTG determined for this image element circuit and the second target display data GTG determine gray scale compensation parameter k and the b of this image element circuit.
The second implementation, comprises the following steps B1 to step B7::
Step B1: respectively first of input the display data GTG is converted to the first analog data signal, is converted to the second analog data signal by second of input the display data GTG;
Step B2: obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Step B3: the first analog current signal is converted to the first digital current signal, is converted to the second digital current signal by the second analog current signal;
Step B4: for arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment;
Step B5: for arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding;
Step B6: for arbitrary image element circuit, first display data GTG and the first GTG increment are added and obtain first object display data GTG and store, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and store;
Step B7: for arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit stored 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
The essence of the embodiment of the present invention compensates the GTG of input display panel, said method is utilized to suffer emulation to the electric current of different pixels circuit under different GTG at simulation softwares, input GTG-the current curve of each image element circuit before having shown gray scale compensation in Fig. 9, input GTG-the current curve of each image element circuit after carrying out gray scale compensation is shown in Figure 10, in Fig. 9, the input GTG-current curve difference of each image element circuit is larger, and the input GTG-current curve of each image element circuit is basically identical in Figure 10, also namely when the display data GTG inputted is identical, the electric current flowing through the driving transistors of each image element circuit is identical, therefore, absolutely prove that the scheme by the embodiment of the present invention can improve the homogeneity of display device viewing area brightness of image from simulation result.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (9)

1. an organic electroluminescence display device and method of manufacturing same, is characterized in that, comprising:
Storer, for storing gray scale compensation look-up table, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
Gray scale compensation module, for receiving display data GTG, determines the addressable address of the image element circuit that the display data GTG received will input, and obtains the gray scale compensation parameter that the described addressable address determined is corresponding from described storer; According to the gray scale compensation parameter obtained, the described display data GTG received is compensated, and exporting the display data GTG after compensating, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Data-driven module, for being converted to analog data signal by the display data GTG after compensation;
Display panel, for receiving described analog data signal, and shows corresponding picture according to described analog data signal.
2. organic electroluminescence display device and method of manufacturing same as claimed in claim 1, it is characterized in that, described organic electroluminescence display device and method of manufacturing same also comprises: gray scale compensation parameter determination module and control module;
Gray scale compensation parameter determination module, for when receiving from control module control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets;
Control module, for transmitting control signal to gray scale compensation parameter determination module, and the gray scale compensation parameter of each image element circuit utilizing gray scale compensation parameter determination module to determine upgrades the gray scale compensation look-up table stored in described storer.
3. organic electroluminescence display device and method of manufacturing same as claimed in claim 2, it is characterized in that, described data-driven module, also for respectively the first display data GTG after first of input the display data GTG or adjustment being converted to the first analog data signal, the second display data GTG after second of input the display data GTG or adjustment is converted to the second analog data signal;
Described display panel, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Described gray scale compensation parameter determination module, specifically comprises: comparing unit, GTG adjustment unit, trigger element, determining unit and arithmetic element;
Comparing unit, for for arbitrary image element circuit, the described first object current value of the value of the first analog current signal of this image element circuit received from data-driven module and setting is compared, described second target current value of the value of the second analog current signal of this image element circuit received from data-driven module and setting is compared, and comparative result is exported to GTG adjustment unit and trigger element;
GTG adjustment unit, for the first display data GTG and the second display data GTG are exported to data-driven module, and according to the comparative result received, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, the first display data GTG after being adjusted, and the first display data GTG after adjustment is exported to data-driven module, and adjustment inputs the display data GTG of each image element circuit on the basis of the second display data GTG, the second display data GTG after being adjusted, and the second display data GTG after adjustment is exported to data-driven module and determining unit,
Trigger element, for for arbitrary image element circuit, when the comparative result of this image element circuit that this receives is not identical with the comparative result of this image element circuit that last time receives, sends the trigger pip for this image element circuit to determining unit;
Determining unit, for when according to the comparative result received, on the first display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When according to the comparative result received, on the second display data GTG basis, adjustment inputs the display data GTG of each image element circuit to GTG adjustment unit, when receiving the trigger pip for image element circuit that trigger element sends, using GTG adjustment unit last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
Arithmetic element, for for arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, determining unit show data GTG for the first object that this image element circuit is determined and the second target shows gray scale compensation parameter k and the b that data GTG determines this image element circuit.
4. organic electroluminescence display device and method of manufacturing same as claimed in claim 2, it is characterized in that, described data-driven module, also for respectively first of input the display data GTG being converted to the first analog data signal, is converted to the second analog data signal by second of input the display data GTG;
Described display panel, also for receiving the first analog data signal and the second analog data signal, export first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
Described gray scale compensation parameter determination module, specifically comprises: input block, AD conversion unit, subtracter, look-up table unit, totalizer, storage unit and arithmetic element;
Described input block, for exporting to data-driven module by the first display data GTG and the second display data GTG;
AD conversion unit, exports to subtracter for the first analog current signal is converted to the first digital current signal, the second analog current signal is converted to the second digital current signal and exports to subtracter;
Subtracter, for for arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment, the first current increment and the second current increment are exported to look-up table unit;
Look-up table unit, for for arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding, and the first GTG increment determined and the second GTG increment are exported to totalizer;
Totalizer, for for arbitrary image element circuit, first display data GTG and the first GTG increment are added and obtain first object display data GTG and export to storage unit, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and export to storage unit;
Storage unit, for for arbitrary image element circuit, stores first object display data GTG and the second target display data GTG of this image element circuit;
Arithmetic element, for for arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit of cell stores 1'=k × G 1+ b, G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
5. organic electroluminescence display device and method of manufacturing same as claimed in claim 2, it is characterized in that, described image element circuit comprises: the first transistor, transistor seconds, third transistor, electric capacity and luminescent device;
The first transistor, its first end is connected with data line, and its control end is connected with grid line, and its second end is connected with the control end of transistor seconds, under the Control of Voltage on grid line, utilizes the analog data signal on data line to be capacitor charging;
Transistor seconds, its control end is connected with the first end of electric capacity, its first end is connected with the first reference voltage, and its second end is connected with the second end of electric capacity, for driving luminescent device luminous according to the sparking voltage of the first reference voltage and electric capacity that are carried in its first end;
Luminescent device, its first end is connected with the second end of electric capacity, and its second end is connected with the second reference voltage;
Third transistor, its control end is connected with grid line, and its first end is connected with the first end of luminescent device, and its second end is connected with gray scale compensation parameter determination module, for exporting the electric current flowing through luminescent device to gray scale compensation parameter determination module.
6. an ORGANIC ELECTROLUMINESCENCE DISPLAYS method, is characterized in that, comprising:
Receive display data GTG;
Determine the addressable address of image element circuit that the display data GTG received will input, from storer, obtain the gray scale compensation parameter that the described addressable address determined is corresponding; Store gray scale compensation look-up table in described storer, described gray scale compensation look-up table comprises the addressable address of each image element circuit be positioned on display panel and the corresponding relation of gray scale compensation parameter, and described gray scale compensation parameter comprises Monomial coefficient and constant;
According to the gray scale compensation parameter obtained, the described display data GTG received is compensated, display data GTG after being compensated, the display data GTG after described compensation is that to the described display data GTG received and the Monomial coefficient in the gray scale compensation parameter determined amassing is added that the constant in the gray scale compensation parameter determined obtains;
Display data GTG after compensating is converted to the control that analog data signal carries out display frame.
7. ORGANIC ELECTROLUMINESCENCE DISPLAYS method as claimed in claim 6, it is characterized in that, described method also comprises:
When receiving control signal, for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit;
The gray scale compensation parameter of each image element circuit determined is utilized to upgrade the gray scale compensation look-up table stored in described storer;
Wherein, G 1be the first display data GTG, G 2be the second display data GTG, G 1' be first object display data GTG, the G of this image element circuit 2' for the second target display data GTG of this image element circuit, k be Monomial coefficient, the constant that b is, described first display data GTG, the second display data GTG, is positioned at the first object current value of all image element circuits under the first display data GTG of display panel and the second target current value under the second display data GTG presets.
8. ORGANIC ELECTROLUMINESCENCE DISPLAYS method as claimed in claim 7, it is characterized in that, described for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit, specifically comprises:
Respectively the first display data GTG after first of input the display data GTG or adjustment is converted to the first analog data signal, the second display data GTG after second of input the display data GTG or adjustment is converted to the second analog data signal;
Obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
For arbitrary image element circuit, the described first object current value of the value of the first analog current signal of image element circuit and setting is compared, described second target current value of the value of the second analog current signal of image element circuit and setting is compared, obtains comparative result;
According to described comparative result, the display data GTG of each image element circuit of adjustment input on the first display data GTG basis, and the display data GTG adjusting each image element circuit of input on the basis of the second display data GTG;
For arbitrary image element circuit, when comparative result is the display data GTG for each image element circuit of adjustment input on the first display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit first object display data GTG and store; When comparative result is the display data GTG for each image element circuit of adjustment input on the second display data GTG basis, this comparative result with last time this image element circuit comparative result not identical time, using last or this export for this image element circuit display data GTG as this image element circuit the second target display data GTG and store;
For arbitrary image element circuit, according to G 1'=k × G 1+ b, G 2'=k × G 2+ b, the first object display data GTG determined for this image element circuit and the second target display data GTG determine gray scale compensation parameter k and the b of this image element circuit.
9. ORGANIC ELECTROLUMINESCENCE DISPLAYS method as claimed in claim 7, it is characterized in that, described for arbitrary image element circuit, determine respectively the electric current of the driving transistors flowing through this image element circuit be first object current value and the second target current value time input to first object display data GTG and the second target display data GTG of this image element circuit, according to G 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit, specifically comprises:
Respectively first of input the display data GTG is converted to the first analog data signal, second of input the display data GTG is converted to the second analog data signal;
Obtain first analog current signal of driving transistors under the first analog data signal of each pixel cell and the second analog current signal under the second analog data signal;
First analog current signal is converted to the first digital current signal, the second analog current signal is converted to the second digital current signal;
For arbitrary image element circuit, the described first object current value of the value of the first digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the first current increment, described second target current value of the value of the second digital current signal of this image element circuit and setting is carried out doing difference operation and obtains the second current increment;
For arbitrary image element circuit, according to the corresponding relation between the current increment stored and GTG increment, determine the second GTG increment that the second current increment of the first GTG increment that the first current increment of this image element circuit is corresponding and this image element circuit is corresponding;
For arbitrary image element circuit, the first display data GTG and the first GTG increment are added and obtain first object display data GTG and store, the second display data GTG and the second GTG increment are added and obtain the second target display data GTG and store;
For arbitrary image element circuit, according to first object display data GTG, the second target display data GTG, the G of this image element circuit stored 1'=k × G 1+ b and G 2'=k × G 2+ b determines gray scale compensation parameter k and the b of this image element circuit.
CN201410658426.6A 2014-11-18 2014-11-18 A kind of organic electroluminescence display device and method of manufacturing same and method Active CN104318900B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410658426.6A CN104318900B (en) 2014-11-18 2014-11-18 A kind of organic electroluminescence display device and method of manufacturing same and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410658426.6A CN104318900B (en) 2014-11-18 2014-11-18 A kind of organic electroluminescence display device and method of manufacturing same and method

Publications (2)

Publication Number Publication Date
CN104318900A true CN104318900A (en) 2015-01-28
CN104318900B CN104318900B (en) 2016-08-24

Family

ID=52374124

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410658426.6A Active CN104318900B (en) 2014-11-18 2014-11-18 A kind of organic electroluminescence display device and method of manufacturing same and method

Country Status (1)

Country Link
CN (1) CN104318900B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105304024A (en) * 2015-11-30 2016-02-03 上海天马有机发光显示技术有限公司 Display panel pixel current compensation method and system
CN106409226A (en) * 2016-11-09 2017-02-15 深圳天珑无线科技有限公司 Display screen residual image prevention method and device
CN107909965A (en) * 2017-12-07 2018-04-13 京东方科技集团股份有限公司 Compensation method and device for display panel
CN109036277A (en) * 2018-09-27 2018-12-18 京东方科技集团股份有限公司 Compensation method and compensation device, display device, display methods and storage medium
CN109272940A (en) * 2018-11-15 2019-01-25 京东方科技集团股份有限公司 Pixel-driving circuit and its driving method, display base plate
CN109493784A (en) * 2018-12-25 2019-03-19 福建华佳彩有限公司 A kind of circuit structure of over-speed compensation pixel electrode voltage and its compensation method
CN109671389A (en) * 2017-09-29 2019-04-23 Lg 电子株式会社 Organic LED display device and its operating method
WO2019200893A1 (en) * 2018-04-18 2019-10-24 京东方科技集团股份有限公司 Pixel data compensation method and device for display device, and display device
CN110444151A (en) * 2018-05-02 2019-11-12 京东方科技集团股份有限公司 Gray level compensation method and device, display device, computer storage medium
CN110570804A (en) * 2019-09-12 2019-12-13 云谷（固安）科技有限公司 driving device and driving method of display panel and display device
CN112017597A (en) * 2019-05-29 2020-12-01 云谷（固安）科技有限公司 Pixel circuit and display device
CN113284449A (en) * 2021-05-17 2021-08-20 深圳市华星光电半导体显示技术有限公司 Power consumption control method and device for display picture
WO2022001383A1 (en) * 2020-06-29 2022-01-06 Oppo广东移动通信有限公司 Display processing method and apparatus
CN114613318A (en) * 2022-03-14 2022-06-10 厦门天马微电子有限公司 Display module, driving method thereof and display device
CN114822425A (en) * 2021-01-19 2022-07-29 京东方科技集团股份有限公司 Display panel driving method, display panel and display device
TWI819816B (en) * 2022-09-28 2023-10-21 超炫科技股份有限公司 Pixel compensation circuit, driving method thereof and electroluminescence display
CN114822425B (en) * 2021-01-19 2024-08-27 京东方科技集团股份有限公司 Display panel driving method, display panel and display device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040246220A1 (en) * 2003-06-09 2004-12-09 Man-Bok Cheon Display device, apparatus and method for driving the same
CN101097700A (en) * 2006-06-27 2008-01-02 三星电子株式会社 Display apparatus, and method and apparatus for driving the same
US20090322799A1 (en) * 2008-06-27 2009-12-31 Innocom Technology(Shenzhen) Co., Ltd. Liquid crystal display
CN101751843A (en) * 2008-12-10 2010-06-23 乐金显示有限公司 Compensating for display defect of flat panel display
CN101937644A (en) * 2009-06-30 2011-01-05 奇晶光电股份有限公司 Image compensation module, organic light-emitting diode display panel and image compensation method
TW201227662A (en) * 2010-12-27 2012-07-01 Chunghwa Picture Tubes Ltd Method of compensating pixel voltage for a display panel and the structure thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040246220A1 (en) * 2003-06-09 2004-12-09 Man-Bok Cheon Display device, apparatus and method for driving the same
CN101097700A (en) * 2006-06-27 2008-01-02 三星电子株式会社 Display apparatus, and method and apparatus for driving the same
US20090322799A1 (en) * 2008-06-27 2009-12-31 Innocom Technology(Shenzhen) Co., Ltd. Liquid crystal display
CN101751843A (en) * 2008-12-10 2010-06-23 乐金显示有限公司 Compensating for display defect of flat panel display
CN101937644A (en) * 2009-06-30 2011-01-05 奇晶光电股份有限公司 Image compensation module, organic light-emitting diode display panel and image compensation method
TW201227662A (en) * 2010-12-27 2012-07-01 Chunghwa Picture Tubes Ltd Method of compensating pixel voltage for a display panel and the structure thereof

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105304024A (en) * 2015-11-30 2016-02-03 上海天马有机发光显示技术有限公司 Display panel pixel current compensation method and system
CN105304024B (en) * 2015-11-30 2018-05-15 上海天马有机发光显示技术有限公司 A kind of pixel current compensation method of display panel and system
CN106409226A (en) * 2016-11-09 2017-02-15 深圳天珑无线科技有限公司 Display screen residual image prevention method and device
CN109671389A (en) * 2017-09-29 2019-04-23 Lg 电子株式会社 Organic LED display device and its operating method
CN109671389B (en) * 2017-09-29 2022-04-26 Lg 电子株式会社 Organic light emitting diode display device and method of operating the same
CN107909965A (en) * 2017-12-07 2018-04-13 京东方科技集团股份有限公司 Compensation method and device for display panel
US11011114B2 (en) 2017-12-07 2021-05-18 Boe Technology Group Co., Ltd. Compensation method, device, circuit for display panel, display panel and display device
CN107909965B (en) * 2017-12-07 2019-08-13 京东方科技集团股份有限公司 Compensation method and device for display panel
US11211015B2 (en) 2018-04-18 2021-12-28 Boe Technology Group Co., Ltd. Pixel data compensation method and device for display device, display device
WO2019200893A1 (en) * 2018-04-18 2019-10-24 京东方科技集团股份有限公司 Pixel data compensation method and device for display device, and display device
CN110444151A (en) * 2018-05-02 2019-11-12 京东方科技集团股份有限公司 Gray level compensation method and device, display device, computer storage medium
US11217146B2 (en) 2018-05-02 2022-01-04 Ordos Yuansheng Optoelectronics Co., Ltd. Gray-level compensation method and apparatus, display device and computer storage medium
CN110444151B (en) * 2018-05-02 2021-03-09 京东方科技集团股份有限公司 Gray scale compensation method and device, display device and computer storage medium
CN109036277A (en) * 2018-09-27 2018-12-18 京东方科技集团股份有限公司 Compensation method and compensation device, display device, display methods and storage medium
CN109272940A (en) * 2018-11-15 2019-01-25 京东方科技集团股份有限公司 Pixel-driving circuit and its driving method, display base plate
CN109493784A (en) * 2018-12-25 2019-03-19 福建华佳彩有限公司 A kind of circuit structure of over-speed compensation pixel electrode voltage and its compensation method
CN112017597B (en) * 2019-05-29 2021-10-12 成都辰显光电有限公司 Pixel circuit and display device
CN112017597A (en) * 2019-05-29 2020-12-01 云谷（固安）科技有限公司 Pixel circuit and display device
CN110570804A (en) * 2019-09-12 2019-12-13 云谷（固安）科技有限公司 driving device and driving method of display panel and display device
WO2022001383A1 (en) * 2020-06-29 2022-01-06 Oppo广东移动通信有限公司 Display processing method and apparatus
CN114822425A (en) * 2021-01-19 2022-07-29 京东方科技集团股份有限公司 Display panel driving method, display panel and display device
CN114822425B (en) * 2021-01-19 2024-08-27 京东方科技集团股份有限公司 Display panel driving method, display panel and display device
CN113284449A (en) * 2021-05-17 2021-08-20 深圳市华星光电半导体显示技术有限公司 Power consumption control method and device for display picture
CN113284449B (en) * 2021-05-17 2022-08-02 深圳市华星光电半导体显示技术有限公司 Power consumption control method and device for display picture
CN114613318A (en) * 2022-03-14 2022-06-10 厦门天马微电子有限公司 Display module, driving method thereof and display device
CN114613318B (en) * 2022-03-14 2023-07-18 厦门天马微电子有限公司 Display module, driving method thereof and display device
TWI819816B (en) * 2022-09-28 2023-10-21 超炫科技股份有限公司 Pixel compensation circuit, driving method thereof and electroluminescence display

Also Published As

Publication number Publication date
CN104318900B (en) 2016-08-24

Similar Documents

Publication Publication Date Title
CN104318900A (en) Organic electroluminescence display device and method
CN103218970B (en) Active matrix organic light emitting diode (AMOLED) pixel unit, driving method and display device
CN104465715B (en) Image element circuit, driving method, display panel and display device
CN102651194B (en) Voltage driving pixel circuit, driving method thereof and display panel
US10242616B2 (en) Pixel compensation circuit and active matrix organic light emitting diode display apparatus
CN103077680B (en) A kind of OLED pixel-driving circuit
CN102982767B (en) Pixel unit driving circuit, driving method and display device
CN103165080B (en) Pixel circuit and driving method and display device thereof
CN104036725B (en) Image element circuit and its driving method, organic electroluminescence display panel and display device
CN103258501B (en) Pixel circuit and driving method thereof
CN103400548B (en) Pixel-driving circuit and driving method, display device
CN102651196B (en) Drive circuit and drive method of AMOLED (Active Matrix Organic Light-Emitting Diode), and display device
CN106448560A (en) Organic light emitting display panel and driving method thereof, and organic light emitting display device
CN104299572A (en) Pixel circuit, display substrate and display panel
CN102930821B (en) A kind of image element circuit and driving method, display device
CN109036291B (en) Display panel, control method thereof and display device
CN105427809A (en) Pixel compensation circuit and AMOLED display apparatus
CN102789761B (en) Pixel circuit, driving method thereof and organic light emitting display
CN108154834B (en) Electroluminescent display panel and cross-voltage detection method of light emitting device
CN104700780A (en) Pixel circuit and driving method thereof and display device
CN108389551B (en) Pixel circuit, driving method thereof and display device
CN103198793A (en) Pixel circuit, drive method and display device thereof
CN107369412B (en) Pixel circuit, driving method thereof and display device
CN105096826A (en) Pixel circuit and driving method thereof, array substrate and display device
CN203288217U (en) Pixel circuit and display device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant