CN106409232A - Compensation voltage determination method and device, compensation method and system, and driving chip - Google Patents

Compensation voltage determination method and device, compensation method and system, and driving chip Download PDF

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Publication number
CN106409232A
CN106409232A CN201610970875.3A CN201610970875A CN106409232A CN 106409232 A CN106409232 A CN 106409232A CN 201610970875 A CN201610970875 A CN 201610970875A CN 106409232 A CN106409232 A CN 106409232A
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China
Prior art keywords
voltage
sub
pixel circuits
magnitude
data
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CN201610970875.3A
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Chinese (zh)
Inventor
张春雷
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Kunshan Govisionox Optoelectronics Co Ltd
Kunshan Guoxian Photoelectric Co Ltd
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Kunshan Guoxian Photoelectric Co Ltd
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Priority to CN201610970875.3A priority Critical patent/CN106409232A/en
Publication of CN106409232A publication Critical patent/CN106409232A/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element

Abstract

The invention discloses a sub pixel circuit compensation voltage determination method for solving the problem of how to determine the voltage value for the power supply voltage compensation of a sub pixel circuit in the prior art. The method comprises a step of obtaining the first brightness value when a first sub pixel circuit emits light under the driving of first data voltage, a step of obtaining a second brightness value when a second sub pixel circuit as a reference emits light under the driving of second data voltage, and a step of determining the voltage value for compensating the data voltage of the first sub pixel circuit according to the obtained first brightness value and the second brightness value. The invention also discloses a sub pixel circuit compensation voltage determination device, a sub pixel voltage compensation method, system and a driving chip. By using the method, the brightness uniformity degree of an AMOLED panel which the first sub pixel circuit and the second sub pixel circuit belong can be improved effectively, and the display quality of the AMOLED panel is improved.

Description

Offset voltage determines method, device, compensation method, system and driving chip
Technical field
The application is related to technical field of display panel, and more particularly, to one sub-pixel circuits offset voltage determines method, dress Put, sub-pixel voltage compensation method, system and driving chip.
Background technology
Current active matrix organic light-emitting diode (Active-matrix organic light emitting Diode, AMOLED) display floater, especially large-sized AMOLED display floater, due to being driven the wiring of supply voltage Mode and the impact walking line impedence, the driving power supply voltage reaching each effective display unit (sub-pixel circuits) often exists Difference, thus causing display picture uneven, the overall display quality of impact AMOLED display floater.
In order to ensure the overall display quality of AMOLED display floater it may be considered that passing through to compensate the data of sub-pixel circuits The mode of voltage (i.e. the voltage of data wire), comparatively supply voltage is made up than relatively low sub-pixel circuits.As What, it is determined that compensating great magnitude of voltage for the data voltage of sub-pixel circuits, is current problem demanding prompt solution.
Content of the invention
The embodiment of the present application provides a sub-pixel circuits offset voltage to determine method, in order to solve prior art presence How to determine the problem of the magnitude of voltage for sub-pixel circuits are carried out with data voltage compensation.
The embodiment of the present application also provides a kind of determination device determining sub-pixel circuits offset voltage, in order to solve existing skill The problem of the magnitude of voltage how determining for sub-pixel circuits are carried out with data voltage compensation that art exists.
The embodiment of the present application also provides a kind of voltage compensating method, voltage compensation system and driving chip.
The embodiment of the present application adopts following technical proposals:
One sub-pixel circuits offset voltage determines method, including:
Obtain the first sub-pixel circuits and drive the first brightness value when issuing light in the first data voltage;
Obtain the second sub-pixel circuits as benchmark and drive the second brightness value when issuing light in the second data voltage;
According to described first brightness value getting and described second brightness value, determine for compensating the first sub-pixel circuits Data voltage magnitude of voltage.
A kind of determination device determining sub-pixel circuits offset voltage using said method, including:
Brightness value acquiring unit, drives when issuing light first for obtaining the first sub-pixel circuits in the first data voltage Brightness value, and obtain as benchmark the second sub-pixel circuits second data voltage drive issue light when the second brightness Value;
Magnitude of voltage determining unit, for described first brightness value and described second being got according to brightness value acquiring unit Brightness value, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits.
A kind of voltage compensation system, including:
Memorizer, for storage for compensating the magnitude of voltage of the data voltage of the first sub-pixel circuits;
Magnitude of voltage reading device, for reading described magnitude of voltage from described memorizer;
Voltage adjusting device, for the magnitude of voltage being read according to described magnitude of voltage reading device, to described for driving The voltage of the data signal of the first sub-pixel circuits is adjusted;
Signal projector, for by the data signal of the 3rd data voltage after adjustment, being sent to described first sub-pixel The data wire that circuit is connected.
A kind of driving chip, including above-mentioned voltage compensation system.
A kind of voltage compensating method, including:
Determine the magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits;
According to the magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits, to for driving described first son The voltage of the data signal of image element circuit is adjusted;
By the data signal after adjustment, it is sent to the data wire that described first sub-pixel circuits are connected.
At least one technical scheme above-mentioned that the embodiment of the present application adopts can reach following beneficial effect:
Due to the first brightness value that can be according to the first sub-pixel circuits when the first data voltage driving issues light, and The second sub-pixel circuits as benchmark drive the second brightness value when issuing light in the second data voltage, determine for compensating the The magnitude of voltage of the data voltage of one sub-pixel circuits, is thus provided that one kind determines for carrying out supply voltage to sub-pixel circuits The scheme of the magnitude of voltage compensating, the driving power supply voltage solving each effective display unit in prior art has differences, with And the impact due to aspects such as techniques, cause display picture uneven, the problem of the overall display quality of impact panel.
Brief description
Accompanying drawing described herein is used for providing further understanding of the present application, constitutes the part of the application, this Shen Schematic description and description please is used for explaining the application, does not constitute the improper restriction to the application.In the accompanying drawings:
Fig. 1 provides what a sub-pixel circuits offset voltage determined method to implement flow chart for the embodiment of the present application;
Fig. 2 is to need to carry out the schematic diagram of the sub-pixel of data voltage compensation in AMOLED panel;
Fig. 3 be in AMOLED panel the junction point that is connected with power line respectively of each row sub-pixel circuits at a distance of power supply away from From schematic diagram;
The concrete structure of the determination device of the sub-pixel circuits offset voltage that Fig. 4 provides for the embodiment of the present application is illustrated Figure;
A kind of voltage compensating method that Fig. 5 provides for the embodiment of the present application implement flow chart;
A kind of concrete structure schematic diagram of voltage compensation system that Fig. 6 provides for the embodiment of the present application;
A kind of concrete structure schematic diagram of driver IC for providing in the embodiment of the present application for the Fig. 7.
Specific embodiment
Purpose, technical scheme and advantage for making the application are clearer, below in conjunction with the application specific embodiment and Corresponding accompanying drawing is clearly and completely described to technical scheme.Obviously, described embodiment is only the application one Section Example, rather than whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing The every other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of the application protection.
Below in conjunction with accompanying drawing, describe the technical scheme that each embodiment of the application provides in detail.
Embodiment 1
For solving the magnitude of voltage how determining for sub-pixel circuits are carried out with data voltage compensation that prior art exists Problem, the data voltage V to sub-pixel circuits for the inventordata, supply voltage Vdd, drive sub-pixel circuits in light-emitting diodes Relation between pipe (OLED) the electric current I that works, and brightness L when luminous for the electric current I and OLED that driven by electric current I is carried out Analysis.Specifically, the relation between those physical quantitys can be represented with formula below [1] and [2]:
I=kL [1]
Wherein, k is the inverse of current efficiency;μ is carrier mobility;CoxFor gate insulation GI layer unit-area capacitance;W/L For device channel breadth length ratio;N is the empirical value determined according to practical situation, and span is generally (1.2,2.8).
According to the relation between above-mentioned physical quantity, for any two row sub-pixel circuits (as J row sub-pixel circuits With the i-th row sub-pixel circuits) for, following formula [3]~[6] are set up:
IJ=kLJ[3]
Ii=kLi[4]
Wherein, i and J is respectively the i-th row sub-pixel circuits and J row sub-pixel circuits belonging to this two row sub-pixel circuits AMOLED in residing row line number;IJFor the electric current driving the OLED in J row sub-pixel circuits to work;IiFor driving the i-th row The electric current of the OLED work in sub-pixel circuits;LJIt is by IJBrightness value when luminous for the J row sub-pixel circuits driving;Li It is by IiBrightness value when luminous for the i-th row sub-pixel circuits driving;VddJSupply voltage for J row sub-pixel circuits; VdataJData voltage for J row sub-pixel circuits;VddiSupply voltage for the i-th row sub-pixel circuits;VdataiFor the i-th row The data voltage of image element circuit.
Taking J row sub-pixel circuits and the i-th row sub-pixel circuits as a example it is contemplated that the embodiment of the present application will determine for right Sub-pixel circuits carry out the magnitude of voltage of supply voltage compensation, its purposes, are to work as VdataJ=Vdatai=Vdata, and Vddi≠VddJ In the case of so that IJ=Ii.Therefore, work as VdataJ=Vdatai=VdataWhen, according to above-mentioned formula [3]~[6], can release down State formula [7] and [8]:
Based on formula [7] and [8], may further determine that out for supply voltage benefit is carried out to the i-th row sub-pixel circuits The magnitude of voltage Δ V repayingdataiComputing formula as follows:
Based on above-mentioned analysis process and the analysis result that obtains, the embodiment of the present application provides sub-pixel circuits to compensate Voltage determines method.The method implement flow chart as shown in figure 1, comprising the steps:
Step 11, obtains the first sub-pixel circuits and drives the first brightness value when issuing light in the first data voltage;
Previously described i-th row sub-pixel circuits, are equivalent to the first sub-pixel circuits described in step 11.
In the embodiment of the present application, when the first sub-pixel circuits drive and issue light in the first data voltage, can be by super High definition resolution device (the SEMU mura check machine of such as SEMI company exploitation), to belonging to the first sub-pixel circuits The viewing area of AMOLED is shot, thus according to shooting result, determining that the first sub-pixel circuits are driven in the first data voltage Dynamic the first brightness value issuing during light.This first brightness value, that is, be equivalent to previously described Li.
Due to how this first brightness value being determined according to shooting result, it has been the correlation technique having been carried out at present, because This embodiment of the present application is no longer repeated.
The executive agent of the method described in the embodiment of the present application, can exactly be used for described viewing area is shot from And determine the equipment of the first brightness value;Or, described executive agent, can be another equipment setting up correspondence with this equipment (can be described as offset voltage and determine equipment) etc..It is for the situation that described offset voltage determines equipment for described executive agent, Offset voltage determines that equipment obtains the specific implementation of the first brightness value, can include:Receive for described viewing area Shot so that it is determined that the first brightness value equipment send the first brightness value.
Step 12, obtain the second sub-pixel circuits as benchmark drive in the second data voltage second bright when issuing light Angle value;
Previously described J row sub-pixel circuits, are equivalent to the second sub-pixel circuits described in step 12.
Due to the implementation of step 12, the implementation basic simlarity with step 11, therefore the embodiment of the present application is to step Rapid 12 specific implementation repeats no more.
It should be noted that when the first sub-pixel circuits and the second sub-pixel circuits, be that AMOLED panel comprises one During full line sub-pixel circuits, the first sub-pixel circuits drive the first brightness value when issuing light in the first data voltage, are first Each sub-pixel circuits that sub-pixel circuits comprise drive the meansigma methodss of brightness value when issuing light in the first data voltage.Similar Ground, the second sub-pixel circuits drive the second brightness value when issuing light in the second data voltage, are that the second sub-pixel circuits comprise Each sub-pixel circuits second data voltage drive issue light when brightness value meansigma methodss.
Certainly, the first sub-pixel circuits are not it is also possible to be the sub-pixel circuits of the full line that AMOLED panel comprises, but Need in AMOLED panel to carry out the sub-pixel circuits of data voltage compensation.As shown in Fig. 2 needing to carry out in AMOLED panel The schematic diagram of the sub-pixel that data voltage compensates.In this AMOLED panel 21 as shown in Figure 2, exist due to processing technology etc. Reason causes the sub-pixel circuits 22 (collection that usually some sub-pixel circuits are constituted of luminous abnormal (abnormal bright or abnormal dark) Close), thus leading to the display inequality of whole AMOLED panel 21.For sub-pixel circuits 22, it would however also be possible to employ the application is implemented The method that example provides, determines that sub-pixel circuits 22 drive the first brightness value when issuing light in the first data voltage.In this scene Under, this first brightness value, each sub-pixel circuits that can be comprised by sub-pixel circuits 22 are driven in the first data voltage respectively The meansigma methodss of the dynamic brightness value issuing during light.
When the first sub-pixel circuits are not full line sub-pixel circuits, in the embodiment of the present application, still can be with a certain whole The sub-pixel circuits of row (or a few full line) are as benchmark (namely as second sub-pixel circuits).
So that the follow-up magnitude of voltage according to the data voltage for compensating the first sub-pixel circuits determined, to the After the data voltage of one sub-pixel circuits compensates, enabling to brightness when luminous for first sub-pixel circuits will not be too Secretly, in the embodiment of the present application, the selection standard that can be provided as the second sub-pixel circuits of benchmark is as follows:
Compared in the AMOLED panel belonging to described first sub-pixel circuits and the second sub-pixel circuits, except described the The junction point that other sub-pixel circuits outside two sub-pixel circuits are connected with power line is at a distance of the distance of power supply, described second son The junction point that image element circuit is connected with power line at a distance of power supply distance closer to.
For according to selected second sub-pixel circuits of above-mentioned selection standard, due to the second sub-pixel circuits and electricity The junction point that source line is connected at a distance of power supply distance comparatively closer to, therefore, the supply voltage phase of the second sub-pixel circuits Supply voltage for other sub-pixel circuits described (including the first sub-pixel circuits) can be some higher.Therefore, with this The supply voltage of the second sub-pixel circuits of sample as benchmark, to determine data voltage for compensating the first sub-pixel circuits Magnitude of voltage, so that the overall brightness of the AMOLED panel after compensating is brighter.
Refer to Fig. 3, be junction point that in AMOLED panel, each row sub-pixel circuits are connected with power line respectively apart The schematic diagram of the distance of power supply.AMOLED panel 31 in Fig. 3 is assumed to comprise Z row sub-pixel circuits altogether, each row sub-pixel circuits Be followed successively by from top to bottom the 1st row, the 2nd row ..., Z row;Numbering is 32 line is power line 32, and this power line 32 is sequentially connected 1st row~the Z row sub-pixel circuits.Taking the 1st row sub-pixel circuits as a example, the sub-pixel circuits of this power line 32 and the 1st row Junction point is junction point 33.So, according to the selection standard of above-mentioned the second sub-pixel circuits as benchmark, for AMOLED face For plate 31, the 1st row sub-pixel circuits can be selected as benchmark.
Certainly, it is also possible to choose other pixels being unsatisfactory for above-mentioned selection standard in AMOLED in the embodiment of the present application As benchmark, the embodiment of the present application does not limit as benchmark circuit to choosing what kind of sub-pixel circuits.But usually, in reality In the application of border, the sub-pixel circuits that can select luminous situation relatively good (as than more uniform) are as benchmark.
Relation for the first data voltage and the second data voltage it should be noted that in the embodiment of the present application, in order to The first brightness value and the second brightness value is made to possess comparability, usually, described first data voltage and described second data are electric The magnitude of voltage of pressure can be with the data voltage of equal J row sub-pixel circuits described earlier and the i-th row sub-pixel circuits Data voltage as a example, that is, be equivalent to VdataJ=Vdatai=Vdata.Or, the magnitude of voltage of described first data voltage and described The absolute value of the difference of the magnitude of voltage of two data voltages, can be more than 0, but less than predetermined voltage value threshold.In practical application In, this voltage value threshold can be set according to demand, and the embodiment of the present application is not construed as limiting to this.
Step 13, according to the first brightness value getting and the second brightness value, determines for compensating the first sub-pixel circuits Data voltage magnitude of voltage.
Specifically, in the embodiment of the present application, can be calculated for compensating the first son according to formula [9] explained before The magnitude of voltage of the data voltage of image element circuit.When this magnitude of voltage is calculated according to formula [9], the first brightness described in step 13 Value, is equivalent to the L in formula [9]i, and described second brightness value, then be equivalent to the L in formula [9]J.
The number embodying mode, calculating for compensating the first sub-pixel circuits according to formula [9] from formula [9] According to the magnitude of voltage of voltage, that is, according to described first brightness value, described second brightness value, the inverse of current efficiency, device ditch Road breadth length ratio, carrier mobility and gate insulation GI layer unit-area capacitance, calculate for compensating the first sub-pixel circuits The magnitude of voltage of data voltage.
In the embodiment of the present application, after the magnitude of voltage of the data voltage calculating for compensating the first sub-pixel circuits, also This magnitude of voltage can be exported.Specifically, this magnitude of voltage such as can export in the driver IC of AMOLED panel Row storage, so that driver IC subsequently compensates to the data voltage of the first sub-pixel circuits according to this magnitude of voltage.
Wherein, the driver IC of AMOLED panel, refers to that the driving chip of setting in AMOLED panel (also referred to as drives brilliant Piece, drive integrated circult or display floater drive), the effect of this driver IC, generally comprise:Digital Image Data is entered Row serializing is processed, to obtain the digital signal being respectively used to each row sub-pixel circuits driving AMOLED panel;Then, then will Corresponding digital signal is respectively converted into each row sub-pixel circuits corresponding analogue signal respectively to each row sub-pixel circuits respectively;Will Corresponding analogue signal is sent respectively to the data wire that each row sub-pixel circuits are connected to each row sub-pixel circuits respectively, and it is right to realize The driving of each row sub-pixel circuits.
Using the embodiment of the present application provide said method, due to can according to the first sub-pixel circuits first data electricity Pressure drives and issues the first brightness value during light, and drives in the second data voltage and issue as the second sub-pixel circuits of benchmark Second brightness value of light time, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits, is thus provided that one kind Determine the scheme of the magnitude of voltage for sub-pixel circuits are carried out with supply voltage compensation, solve the drive of each effective display unit Dynamic supply voltage has differences, and the impact due to aspects such as techniques, causes display picture uneven, and the entirety of impact panel shows Show the problem of quality.
For inventive concept same as mentioned above, the embodiment of the present application also provides one kind to utilize previously described sub- picture Plain circuit compensation voltage determines that method determines the determination device of sub-pixel circuits offset voltage, in order to solve prior art presence How to determine the problem of the magnitude of voltage for sub-pixel circuits are carried out with supply voltage compensation.The concrete structure schematic diagram of this device As shown in figure 4, including following functional unit:
Brightness value acquiring unit 41, drives when issuing light for obtaining the first sub-pixel circuits in the first data voltage One brightness value, and obtain as benchmark the second sub-pixel circuits second data voltage drive issue light when the second brightness Value;
Magnitude of voltage determining unit 42, for described first brightness value that got according to brightness value acquiring unit 41 and described Second brightness value, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits.
The first sub-pixel circuits of referring to when introducing described device, the second sub-pixel circuits and other definition concrete Introduce, may refer to introducing the related description carrying out during the method for the embodiment of the present application offer above, repeat no more.
Relation for the first data voltage and the second data voltage it should be noted that in the embodiment of the present application, in order to The first brightness value and the second brightness value is made to possess comparability, usually, described first data voltage and described second data are electric The magnitude of voltage of pressure can be with the data voltage of equal J row sub-pixel circuits described earlier and the i-th row sub-pixel circuits Data voltage as a example, that is, be equivalent to VdataJ=Vdatai=Vdata.Or, the magnitude of voltage of described first data voltage and described The absolute value of the difference of the magnitude of voltage of two data voltages, can be more than 0, but less than predetermined voltage value threshold.In practical application In, this voltage value threshold can be set according to demand, and the embodiment of the present application is not construed as limiting to this.
In the embodiment of the present application, a kind of implementation of brightness value acquiring unit 41 function includes:
When described first sub-pixel circuits drive and issue light in described first data voltage, to described first sub-pixel electricity The viewing area of the active matrix organic light-emitting diode display floater belonging to road and described second sub-pixel circuits is shot, And according to shooting result, determine that the first sub-pixel circuits drive the first brightness value when issuing light in described first data voltage;
When described second sub-pixel circuits drive and issue light in described second data voltage, organic to described active matrix The viewing area of LED display panel is shot, and according to shooting result, determines the second sub-pixel circuits described Second data voltage drives the second brightness value issuing during light.
In one embodiment, the data voltage for compensating the first sub-pixel circuits can be calculated according to formula [9] Magnitude of voltage that is to say, that magnitude of voltage determining unit 42 can be according to described first brightness value, described second brightness value, electric current The inverse of efficiency, device channel breadth length ratio, carrier mobility and gate insulation GI layer unit-area capacitance, calculate for compensating The magnitude of voltage of the data voltage of the first sub-pixel circuits.
Magnitude of voltage in order to realize magnitude of voltage determining unit 42 is determined exports, and provide in the embodiment of the present application should Device can also include:Output unit (not shown).This output unit, in magnitude of voltage determining unit 42 according to described First brightness value and the second brightness value, after determining the magnitude of voltage of data voltage for compensating the first sub-pixel circuits, output electricity The magnitude of voltage that pressure value determining unit determines.
The determination device of this sub-pixel circuits offset voltage that the embodiment of the present application provides, can be a kind of entity device (often realizing function by the way of software and hardware combining) or a kind of virtual unit (can be such as a kind of applications Program), the embodiment of the present application is not defined to this.
Using the embodiment of the present application provide said apparatus, due to can according to the first sub-pixel circuits first data electricity Pressure drives and issues the first brightness value during light, and drives in the second data voltage and issue as the second sub-pixel circuits of benchmark Second brightness value of light time, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits, is thus provided that one kind Determine the scheme of the magnitude of voltage for sub-pixel circuits are carried out with supply voltage compensation, solve the drive of each effective display unit Dynamic supply voltage has differences, and the impact due to aspects such as techniques, causes display picture uneven, and the entirety of impact panel shows Show the problem of quality.
Embodiment 2
Determine scheme identical inventive concept, this Shen for the sub-pixel circuits offset voltage providing with the embodiment of the present application Embodiment please also provide a kind of voltage compensating method, in order to solve in prior art due to the supply voltage of different subpixel circuit Have differences, and the impact due to aspects such as techniques, and lead to the uneven problem of AMOLED panel display.The method concrete Schematic flow sheet is as shown in figure 5, comprise the steps:
Step 51, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits;
Wherein, the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits mentioned here, can be using real Apply what the method described in example 1 or device determined.
Determine the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits described in step 51, may refer to from In the storage storing this magnitude of voltage (this magnitude of voltage specifically can be determined) using the method described in embodiment 1 or device In space (as the memorizer of driver IC), obtain this magnitude of voltage;Or, can be directly to adopt the side described in embodiment 1 Method, or call the device described in (or triggering) embodiment 1 to determine this magnitude of voltage in real time.
In one embodiment, can be to receive the horizontal synchronization for the first sub-pixel circuits After (horizontal synchronization, HSYNC) signal, using this signal as the condition of triggering execution step 51, enter Row is for compensating the determination of the magnitude of voltage of data voltage of the first sub-pixel circuits.
Step 52, according to the magnitude of voltage of the data voltage determined for compensating the first sub-pixel circuits, to for driving The voltage of the data signal of dynamic first sub-pixel circuits is adjusted;
In the embodiment of the present application, taking the i-th row sub-pixel circuits as AMOLED panel for first sub-pixel circuits as a example, according to The magnitude of voltage determined is adjusted to the voltage for driving the data signal of the i-th row sub-pixel circuits, specifically may refer to According to the following equation [10], after calculating the data signal for driving the i-th row sub-pixel circuits being adjusted, obtained number It is believed that number voltage
Wherein,It is the electricity for driving the data signal of the i-th row sub-pixel circuits (data signal before not adjusting) Pressure;It is for driving the data signal of the i-th row sub-pixel circuits to carry out the voltage after Voltage Cortrol;ΔVdataiIt is for mending Repay the magnitude of voltage of the data voltage of the first sub-pixel circuits, specific formula for calculation can be found in formula [9] above.Depending on practical situation, ΔVdataiValue may be negative or positive.
Step 53, the data signal after adjustment is sent to the data wire that the first sub-pixel circuits are connected, to trigger the The OLED of one sub-pixel circuits is luminous under the driving of the data signal after described adjustment.
This voltage compensating method being provided using the embodiment of the present application, even if the supply voltage due to the first sub-pixel circuits With respect to the second sub-pixel circuits as benchmark supply voltage deviation it is also possible to by drive first sub-pixel electricity The compensation of the data voltage on road is so that the electric current of driving the first sub-pixel circuits is identical with the electric current driving the second sub-pixel circuits Or as identical as possible, it is thus possible to improve the AMOLED panel brightness belonging to the first sub-pixel circuits and the second sub-pixel circuits Homogenization degree, improves the display quality of AMOLED panel.
For the above-mentioned voltage compensating method identical inventive concept providing with the embodiment of the present application, the embodiment of the present application is also There is provided a kind of voltage compensation system, in order to solve in prior art because the supply voltage of different subpixel circuit has differences Lead to the uneven problem of AMOLED panel display.The concrete structure schematic diagram of this voltage compensation system is as shown in fig. 6, include as follows Functional unit:
Memorizer 61, for storage for compensating the magnitude of voltage of the data voltage of the first sub-pixel circuits;
Horizontal-drive signal receptor 62, for receiving the HSYNC signal for the first sub-pixel circuits;
Magnitude of voltage reading device 63, for after horizontal-drive signal receptor 62 receives described HSYNC signal, from depositing The magnitude of voltage of the data voltage for compensating the first sub-pixel circuits is read in reservoir 62;
Voltage adjusting device 64, for the magnitude of voltage being read using magnitude of voltage reading device 63, to for driving first The voltage of the data signal of sub-pixel circuits is adjusted;
Signal projector 65, for by the data signal of the 3rd data voltage after adjustment, being sent to the first sub-pixel electricity The data wire that road is connected.
Or, in the embodiment of the present application, magnitude of voltage reading device 63 can not also be in order to horizontal-drive signal receptor 62 Receive HSYNC signal as trigger condition, and read the data electricity for compensating the first sub-pixel circuits from memorizer 62 The magnitude of voltage of pressure.In this case, horizontal-drive signal receptor 62 receive HSYNC signal can as triggering " signal is sent out Emitter 65 by adjust after the 3rd data voltage data signal, be sent to the data wire that the first sub-pixel circuits are connected " Trigger condition.
In actual applications, said system can be contained in driving chip (driver IC).Carry in the embodiment of the present application For a kind of driver IC concrete structure schematic diagram as shown in fig. 7, comprises Display Engine TCON71, Data Latcha72, Line Buffer73, Gamma Generator74 (wherein comprising DAC741) and Line Source compensating unit 75.Hereinafter the function of each several part is described in detail:
Display Engine TCON71, also known as display engine logic card.Its effect, for original by receive Picture signal (analogue signal) carries out analog conversion, and original image signal is converted into discrete digital signal.For ease of reason Solution, hereinafter by the described original image signal receiving, referred to as original image signal, the discrete numeral letter that conversion is obtained Number, referred to as digitized view data.Original image signal is being converted into digitized figure by Display Engine TCON71 As, after data, sequential process being carried out to digitized view data so that digitized view data is with the side of data sequence Formula, stores in Data Latcha72.Wherein, an image data sequence, a line sub-pixel electricity of corresponding A MOLED panel Road.
Additionally, another effect of Display Engine TCON71, it is to Line Source compensating unit 75 Send timing control signal, so that Line Source compensating unit 75, according to timing control signal, determines that current time slots should Which with the drive signal that DAC741 is sent to Line Source compensating unit 75, sub-pixel sequence is driven.
Data Latcha72, referred to as data latches, for store Display Engine TCON71 output by counting The image data sequence that the view data of word is constituted.
Line Buffer73, referred to as line buffer.Line buffer is a caching, for when quilt in Data Latcha72 After Display Engine TCON71 write image data sequence, to Line Source compensating unit 75 in Display The image data sequence reading from Data Latcha72 under the control of the timing control signal that Engine TCON71 sends enters Row storage.Wherein, the timing control signal that Line Source compensating unit 75 sends in Display Engine TCON71 Under control, according to each mode reading single image data sequence, from Data Latcha72, read image data sequence, And store the image data sequence reading to Line Buffer73.Such as, Display Engine TCON71 is permissible According to certain frequency, periodicity transmission timing control signal compensates to Line Source compensating unit 75, Line Source Unit 75 often receives a timing control signal, just reads an image data sequence.The image data sequence being read No longer carry out repeating to read, the image data sequence being therefore read can be deleted from Data Latcha72.
Gamma Generator74, for being monitored to the image data sequence storing in Line Buffer73 and reading Take, once monitoring to store image data sequence in Line Buffer73, Gamma Generator74 is just by Line In Buffer73, the image data sequence of storage reads in DAC741 and carries out D/A conversion, so that image data sequence is converted into Corresponding analogue signal (after the analogue signal that single image data sequence is carried out obtaining after D/A conversion is referred to as driven letter Number), then, Gamma Generator74 will convert the drive signal obtaining, and exports to Line Source compensating unit 75.
Line Source compensating unit 75, for receiving the sequencing contro letter that Display Engine TCON71 sends Number, and under the control of described timing control signal, read image data sequence from Data Latcha72 to Line In Buffer73.Image data sequence is read some steps carrying out after Line Buffer73 referring to description above, this Place is not repeated to introduce.
Line Source compensating unit 75, is additionally operable to receive HSYNC signal, and fixed according to the HSYNC signal receiving After position goes out sub-pixel circuits to be driven (such as assuming it is previously described i-th row sub-pixel circuits), using being stored in Line The data voltage for compensating sub-pixel circuits (the i-th row sub-pixel circuits as previously described) in Source compensating unit 75 Magnitude of voltage, Gamma Generator74 is currently exported to be driven for driving to Line Source compensating unit 75 The voltage of the drive signal of sub-pixel circuits (such as assuming it is previously described i-th row sub-pixel circuits) compensates.Specifically Ground, when described magnitude of voltage is timing, can be lifted with this magnitude of voltage for voltage increase amount to the voltage of this drive signal, The voltage making this drive signal, by original voltage, is promoted to " original voltage+voltage increase amount ";Similarly, when described When magnitude of voltage is negative, the voltage of this drive signal with the absolute value of this magnitude of voltage as decrease amount av, can be reduced to " original Voltage-voltage lifting capacity ".
Then, the driving voltage after voltage can be changed by Line Source compensating unit 75, is sent in figure Source Driver76.Wherein, this Source Driver76, may refer to for driving described sub-pixel circuits to be driven The driving transistor of the OLED work in (such as assuming it is previously described i-th row sub-pixel circuits).Specifically, voltage changes Driving voltage after change, is sent to the grid of this driving transistor, so that be connected with the drain electrode of this driving transistor OLED works (lighting).
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, system or computer program Product.Therefore, the application can be using complete hardware embodiment, complete software embodiment or the reality combining software and hardware aspect Apply the form of example.And, the application can be using in one or more computers wherein including computer usable program code The upper computer program implemented of usable storage medium (including but not limited to disk memory, CD-ROM, optical memory etc.) produces The form of product.
The application be with reference to the embodiment of the present application the flow chart of method, equipment (system) and computer program and/ Or block diagram is describing.It should be understood that can by each flow process in computer program instructions flowchart and/or block diagram and/ Or the combination of the flow process in square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can be provided To general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device processor to produce one Individual machine is so that produced for realizing by the instruction of computer or the computing device of other programmable data processing device The device of the function of specifying in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device with spy Determine in the computer-readable memory that mode works so that the instruction generation inclusion being stored in this computer-readable memory refers to Make the manufacture of device, this command device realize in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or The function of specifying in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that counting On calculation machine or other programmable devices, execution series of operation steps to be to produce computer implemented process, thus in computer or On other programmable devices, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process and/or block diagram one The step of the function of specifying in individual square frame or multiple square frame.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net Network interface and internal memory.
Internal memory potentially includes the volatile memory in computer-readable medium, random access memory (RAM) and/or The forms such as Nonvolatile memory, such as read only memory (ROM) or flash memory (flash RAM).Internal memory is computer-readable medium Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method Or technology is realizing information Store.Information can be computer-readable instruction, data structure, the module of program or other data. The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves State random access memory (DRAM), other kinds of random access memory (RAM), read only memory (ROM), electric erasable Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc read only memory (CD-ROM), Digital versatile disc (DVD) or other optical storage, magnetic cassette tape, the storage of tape magnetic rigid disk or other magnetic storage apparatus Or any other non-transmission medium, can be used for storing the information that can be accessed by a computing device.Define according to herein, calculate Machine computer-readable recording medium does not include temporary computer readable media (transitory media), the such as data signal of modulation and carrier wave.
Also, it should be noted term " inclusion ", "comprising" or its any other variant are intended to nonexcludability Comprising, so that including a series of process of key elements, method, commodity or equipment not only include those key elements, but also wrapping Include other key elements being not expressly set out, or also include for this process, method, commodity or intrinsic the wanting of equipment Element.In the absence of more restrictions, the key element being limited by sentence "including a ..." is it is not excluded that including key element Also there is other identical element in process, method, commodity or equipment.
These are only embodiments herein, be not limited to the application.To those skilled in the art, The application can have various modifications and variations.All any modifications made within spirit herein and principle, equivalent, Improve etc., within the scope of should be included in claims hereof.

Claims (14)

1. a sub-pixel circuits offset voltage determines method it is characterised in that including:
Obtain the first sub-pixel circuits and drive the first brightness value when issuing light in the first data voltage;
Obtain the second sub-pixel circuits as benchmark and drive the second brightness value when issuing light in the second data voltage;
According to described first brightness value getting and described second brightness value, determine the number for compensating the first sub-pixel circuits Magnitude of voltage according to voltage.
2. the method for claim 1 is it is characterised in that the electricity of described first data voltage and described second data voltage Pressure value is equal.
3. the method for claim 1 is it is characterised in that obtain the first sub-pixel circuits under the first data voltage drives The first brightness value when luminous, including:
When described first sub-pixel circuits drive and issue light in described first data voltage, to described first sub-pixel circuits and The viewing area of the active matrix organic light-emitting diode display floater belonging to described second sub-pixel circuits is shot, and root According to shooting result, determine that the first sub-pixel circuits drive the first brightness value when issuing light in described first data voltage;
Obtain the second brightness value when the second data voltage driving issues light for second sub-pixel circuits, including:
When described second sub-pixel circuits drive and issue light in described second data voltage, to described active matrix organic light-emitting The viewing area of diode display panel is shot, and according to shooting result, determines the second sub-pixel circuits described second Data voltage drives the second brightness value issuing during light.
4. the method for claim 1 is it is characterised in that the second sub-pixel circuits as benchmark meet:
Show compared to the active matrix organic light-emitting diode belonging to described first sub-pixel circuits and the second sub-pixel circuits The junction point that in panel, other sub-pixel circuits in addition to described second sub-pixel circuits are connected with power line is at a distance of power supply Distance, the junction point that described second sub-pixel circuits are connected with power line at a distance of power supply distance closer to.
5. the method for claim 1 is it is characterised in that according to described first brightness value getting and described second bright Angle value, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits, including:
Moved according to described first brightness value, described second brightness value, the inverse of current efficiency, device channel breadth length ratio, carrier Shifting rate and gate insulation GI layer unit-area capacitance, calculate the voltage of the data voltage for compensating the first sub-pixel circuits;Defeated Go out the magnitude of voltage determined.
6. the method for claim 1 is it is characterised in that described first sub-pixel circuits and described second sub-pixel are electric Road, is full line sub-pixel circuits of active matrix organic light-emitting diode display floater;
Described first sub-pixel circuits drive the first brightness value when issuing light in the first data voltage, are described first sub-pixel Each sub-pixel circuits that circuit comprises drive the meansigma methodss of brightness value when issuing light in the first data voltage;
Described second sub-pixel circuits drive the second brightness value when issuing light in the second data voltage, are described second sub-pixel Each sub-pixel circuits that circuit comprises drive the meansigma methodss of brightness value when issuing light in the second data voltage.
7. using sub-pixel circuits offset voltage as described in any one of claim 1-6, one kind determines that method determines sub-pixel circuits The determination device of offset voltage is it is characterised in that include:
Brightness value acquiring unit, drives the first brightness when issuing light for obtaining the first sub-pixel circuits in the first data voltage It is worth, and the second sub-pixel circuits obtaining as benchmark drive the second brightness value when issuing light in the second data voltage;
Magnitude of voltage determining unit, for described first brightness value that got according to brightness value acquiring unit and described second brightness Value, determines the magnitude of voltage of the data voltage for compensating the first sub-pixel circuits.
8. device as claimed in claim 7 is it is characterised in that described device also includes:
Output unit, determines for compensating according to described first brightness value and the second brightness value in magnitude of voltage determining unit After the magnitude of voltage of the data voltage of the first sub-pixel circuits, the magnitude of voltage that output voltage values determining unit determines.
9. a kind of voltage compensation system is it is characterised in that include:
Memorizer, for storage for compensating the magnitude of voltage of the data voltage of the first sub-pixel circuits;
Magnitude of voltage reading device, for reading described magnitude of voltage from described memorizer;
Voltage adjusting device, for the magnitude of voltage being read according to described magnitude of voltage reading device, to for driving described first The voltage of the data signal of sub-pixel circuits is adjusted;
Signal projector, the data signal of the 3rd data voltage for obtaining after adjustment, it is sent to described first sub-pixel The data wire that circuit is connected.
10. system as claimed in claim 9 is it is characterised in that described system also includes:
Horizontal-drive signal receptor, for receiving the horizontal-drive signal for the first sub-pixel circuits;Then, magnitude of voltage reads Device, specifically for, after horizontal-drive signal receptor receives described horizontal-drive signal, reading from described memorizer Described magnitude of voltage.
A kind of 11. driving chip are it is characterised in that include the voltage compensation system as described in claim 9 or 10 any one.
12. a kind of using offset voltage as described in any one of claim 1-6 determine method determine offset voltage value voltage mend Compensation method is it is characterised in that include:
Determine the magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits;
According to the magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits, to for driving described first sub-pixel The voltage of the data signal of circuit is adjusted;
By the data signal after adjustment, it is sent to the data wire that described first sub-pixel circuits are connected.
13. voltage compensating methods as claimed in claim 12 are it is characterised in that determine described electric for compensating the first sub-pixel The magnitude of voltage of the data voltage on road, including:
From the described driving chip of the magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits that is stored with, read The magnitude of voltage of the described data voltage for compensating the first sub-pixel circuits.
14. voltage compensating methods as claimed in claim 12 it is characterised in that from be stored with described for compensating the first sub- picture In the described driving chip of the magnitude of voltage of the data voltage of plain circuit, read the described data for compensating the first sub-pixel circuits The magnitude of voltage of voltage, including:
After the horizontal-drive signal for the first sub-pixel circuits described in receiving, described sub for compensating first from being stored with In the driving chip of the magnitude of voltage of the data voltage of image element circuit, read the described electricity of the data for compensating the first sub-pixel circuits The magnitude of voltage of pressure.
CN201610970875.3A 2016-10-31 2016-10-31 Compensation voltage determination method and device, compensation method and system, and driving chip Pending CN106409232A (en)

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Application publication date: 20170215