CN106297665B - A kind of system and method compensating the internal electric source pressure drop of AMOLED display panel - Google Patents
A kind of system and method compensating the internal electric source pressure drop of AMOLED display panel Download PDFInfo
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- CN106297665B CN106297665B CN201610930048.1A CN201610930048A CN106297665B CN 106297665 B CN106297665 B CN 106297665B CN 201610930048 A CN201610930048 A CN 201610930048A CN 106297665 B CN106297665 B CN 106297665B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
Abstract
A kind of system compensating the internal electric source pressure drop of AMOLED display panel, including AMOLED display panel, detecting voltage unit, computing unit and correction unit；AMOLED display panel be divided on the extending direction of power supply voltage signal line the first area being sequentially connected, second area ..., the total n region in the n-th region, each region have 2k+1 row pixel unit；Detecting voltage unit reads the actual voltage value ELVDD of the voltage value ELVDD of the first row pixel unit of first area and the center row pixel unit in each region1~ELVDDn；Computing unit calculates the actual voltage value ELVDD of the voltage value ELVDD of the first row pixel unit and the center row pixel unit in each region1~ELVDDnVoltage difference delta V1~Δ Vn；Unit is corrected according to voltage difference delta V1~Δ VnThe voltage that every row pixel unit needs to compensate is calculated, and the voltage that every row pixel unit is needed to compensate converts paired data voltage VdataCompensation.The invention further relates to a kind of methods for compensating the internal electric source pressure drop of AMOLED display panel.
Description
Technical field
The present invention relates to a kind of system and method for compensating the internal electric source pressure drop of AMOLED display panel, belong to display system
Actuation techniques field.
Background technique
The type of display technology is more, including LCD (Liquid Crystal Display, liquid crystal display) and OLED
(Organic Light-Emitting Diode, organic light-emitting diode display) etc..Wherein OLED is shown with self-luminous, gently
The advantages that thin power saving, can also be made flexible display apparatus based on flexible material, can be curled, fold or as wearable
A part of equipment.OLED refers to using organic semiconducting materials and luminescent material under electric field driven, is injected by carrier
With the diode of composite guide photoluminescence.OLED principle of luminosity is to use ito transparent electrode and metal electrode respectively as the sun of device
Pole and cathode, under certain voltage driving, electrons and holes are injected into electron and hole transport layer from cathode and anode respectively, electricity
Son and hole pass through electron and hole transport layer respectively and move to luminescent layer, and meet in luminescent layer, form exciton and make to send out
Optical molecule excites and issues visible light.Radiant light can be from ITO unilateral observation to metal electrode film also plays the work in reflecting layer simultaneously
With.
AMOLED (Active Matrix/Organic Light Emitting Diode, active matrix organic light-emitting two
Pole pipe) there is thinner lighter, active to shine without backlight, without viewing angle problem, high-resolution, high brightness, response quickly, energy
The features such as low, use temperature range is wide, shock resistance is strong, achievable soft display is consumed, wherein many characteristics are TFT liquid crystal display panels
It is difficult to realize, nowadays AMOLED has become the OLED technology of mainstream.
Fig. 1 is the structural schematic diagram of existing AMOLED display panel, referring to Fig. 1, AMOLED display panel 10 is a plurality of
Scan line GL, multiple data lines DL and the multiple pixel units (figure does not mark) arranged in arrays for forming multiple lines and multiple rows, each
It is equipped with pixel-driving circuit 11 in pixel unit, pixel-driving circuit 11 is, for example, that (including switch is thin for the most common 2T1C structure
Film transistor, driving thin film transistor (TFT), storage capacitance and Organic Light Emitting Diode), each pixel-driving circuit 11 is by one
Scan line GL and data line DL driving, AMOLED display panel 10 further include power supply chip (figure is not painted) and with electricity
More connected power supply voltage signal line PL of source chip, power supply chip is for providing supply voltage ELVDD, power supply voltage signal line
PL is used for the pixel-driving circuit 11 being transmitted to supply voltage ELVDD in each pixel unit.As shown in Figure 1, it is assumed that
AMOLED display panel 10 has the pixel unit of X row Y column, and the pixel-driving circuit 11 of each column pixel unit passes through a power supply
Voltage signal line PL output supply voltage ELVDD shares Y power supply voltage signal line PL, every power supply voltage signal line PL
On be sequentially connected in series X pixel-driving circuit 11.Ignore in the impedance of the power supply voltage signal line PL to transmission supply voltage ELVDD
Disregard that ideally to flow through the electric current of each pixel-driving circuit 11 be identical, but under actual conditions, due to power supply electricity
Pressure signal wire PL is inevitable in the presence of certain line impedence of walking, and as the size of AMOLED display panel 10 is bigger, divides
Resolution is higher, and power supply voltage signal line PL is longer, and impedance is also bigger, and supply voltage ELVDD can be in power supply voltage signal line
Voltage drop (IR Drop) is generated on PL, the supply voltage in AMOLED display panel 10 close to power supply chip region is than remote
Supply voltage from power supply chip is high, so that the electric current for flowing through the pixel-driving circuit 11 of different location is different, causes
There are deviations for the display brightness of AMOLED display panel 10, and then influence the display effect of display picture.
Summary of the invention
The purpose of the present invention is to provide a kind of system and method for compensating the internal electric source pressure drop of AMOLED display panel, energy
Power voltage-drop is effectively compensated for, the display effect of AMOLED display panel is improved.
The embodiment of the present invention provides a kind of system for compensating the internal electric source pressure drop of AMOLED display panel, including AMOLED is shown
Show panel, detecting voltage unit, computing unit and correction unit；
The AMOLED display panel includes power supply chip, at least one supply voltage being connected with power supply chip letter
It number line and is sequentially connected in series in the multirow pixel unit on the power supply voltage signal line；The AMOLED display panel is described
Be divided on the extending direction of power supply voltage signal line the first area being sequentially connected, second area ..., the total n in the n-th region
A region, each region have 2k+1 row pixel unit, wherein n, k are the positive integer greater than 1；
The detecting voltage unit is used to read the first row pixel of the first area of the AMOLED display panel
The actual voltage value ELVDD of the center row pixel unit of the voltage value ELVDD and each region of unit1~ELVDDn, and will read
Voltage value be sent to the computing unit；
The computing unit is used to receive the first row pixel list for the first area that the detecting voltage unit is read
The actual voltage value ELVDD of the center row pixel unit of the voltage value ELVDD and each region of member1~ELVDDn, and according to
Received voltage value calculates the voltage value ELVDD of the first row pixel unit and the center row pixel list in each region
The actual voltage value ELVDD of member1~ELVDDnVoltage difference delta V1~Δ VnAnd it is sent to the correction unit；
The correction unit is used to receive the voltage difference delta V that the computing unit calculates1~Δ VnAnd according to the voltage difference
ΔV1~Δ VnCalculate the voltage that every row pixel unit needs to compensate, and the voltage that every row pixel unit is needed to compensate
Convert paired data voltage VdataCompensation.
Further, the calculation method of the correction unit are as follows: in the first area, according to the voltage of+1 row of kth
Poor Δ V1Average pressure drop before calculating between the every two rows pixel unit of k row pixel unitThen according to the preceding k row picture
Average pressure drop between the plain every two rows pixel unit of unitWith the voltage difference delta V of+1 row of kth1Calculate described first
The pressure drop of each row pixel unit in regionIn the second region, according to the voltage of (2k+1)+k+1 row
Poor Δ V2Average pressure drop before calculating between the every two rows pixel unit of (2k+1)+k row pixel unitThen according to
Before average pressure drop between the every two rows pixel unit of (2k+1)+k row pixel unitWith the electricity of (2k+1)+k+1 row
Pressure differential deltap V2Calculate the pressure drop of each row pixel unit of the second areaAnd so on, it calculates
The pressure drop of every row pixel unit in AMOLED display panelEvery row in the AMOLED display panel
The pressure drop of pixel unitIt is the voltage that every row pixel unit needs to compensate.
Further, in the first area: Wherein
In the second area: Wherein
……
In (n-1)th region: Wherein
In n-th region: Wherein
Further, the system of the compensation AMOLED display panel internal electric source pressure drop further includes memory, described to deposit
Reservoir is connected with the correction unit, and the memory is used to store every row pixel unit of the AMOLED display panel
Pressure dropThe correction unit from the memory by reading the every of the AMOLED display panel
The pressure drop of row pixel unitConvert paired data voltage VdataCompensation.
Further, the correction unit calculates every row pixel unit and needs after the voltage compensated by searching for table
Mode convert paired data voltage VdataCompensation.
Further, the first area is close to the power supply chip, and n-th region is far from power supply chip, and described
The first row pixel unit in one region is the one-row pixels unit near the power supply chip.
Further, the computing unit is subtracter, including with the AMOLED display panel first area, second
Region ..., one-to-one first subtrator in the n-th region, the second subtrator ..., the n-th subtrator, described
One subtrator is used to receive the actual voltage value ELVDD of the center row pixel unit of the first area1With firstth area
The voltage value ELVDD of the first row pixel unit in domain and calculate the first area the first row pixel unit voltage value
The actual voltage value ELVDD of ELVDD and the center row pixel unit of the first area1Voltage difference delta V1；Second subtraction
Unit is used to receive the actual voltage value ELVDD of the intermediate every trade pixel unit of the second area2With the first area
The voltage value ELVDD of the first row pixel unit and calculate the first area the first row pixel unit voltage value ELVDD
With the actual voltage value ELVDD of the center row pixel unit of the second area2Voltage difference delta V2；……；N-th subtraction
Unit is used to receive the actual voltage value ELVDD of the center row pixel unit in n-th regionnWith the first of the first area
The voltage value ELVDD of row pixel unit and calculate the first area the first row pixel unit voltage value ELVDD and institute
State the actual voltage value ELVDD of the center row pixel unit in the n-th regionnVoltage difference delta Vn。
The embodiment of the present invention also provides a kind of method for compensating the internal electric source pressure drop of AMOLED display panel, comprising: provides
The system of above-mentioned compensation AMOLED display panel internal electric source pressure drop, by AMOLED display panel along power supply voltage signal line
Extending direction be divided into the first area being sequentially connected, second area ..., the total n region in the n-th region, and make each region
2k+1 row pixel unit is all had, wherein n, k are the positive integer greater than 1；
The center row pixel unit of the voltage value ELVDD and each region of the first row pixel unit of reading first area
Actual voltage value ELVDD1~ELVDDn；
Calculate separately out the voltage value ELVDD of the first row pixel unit of first area and the center row pixel in each region
The actual voltage value ELVDD of unit1~ELVDDnVoltage difference delta V1~Δ Vn；
According to voltage difference delta V1~Δ VnCalculate the voltage that every row pixel unit of AMOLED display panel needs to compensate；
And
The voltage that every row pixel unit is needed to compensate converts paired data voltage VdataCompensation.
Further, according to voltage difference delta V1~Δ VnThe every row pixel unit for calculating AMOLED display panel needs to mend
The method for the voltage repaid includes: the voltage difference delta V according to+1 row of first area kth1The every two rows picture of k row pixel unit before calculating
Average pressure drop between plain unitThen according to the average pressure drop between the every two rows pixel unit of preceding k row pixel unit
With the voltage difference delta V of+1 row of kth1Calculate the pressure drop of each row pixel unit in first areaAccording to the secondth area
The voltage difference delta V of domain (2k+1)+k+1 row2It is flat between the every two rows pixel unit of (2k+1)+k row pixel unit before calculating
Equal pressure dropThen the average pressure drop before between the every two rows pixel unit of (2k+1)+k row pixel unitWith
The voltage difference delta V of (2k+1)+k+1 row2Calculate the pressure drop of each row pixel unit of second areaWith such
It pushes away, calculates the pressure drop of every row pixel unit in AMOLED display panelThe AMOLED display panel
In every row pixel unit pressure dropIt is the voltage that every row pixel unit needs to compensate.
Further, the voltage for every row pixel unit being needed to compensate converts paired data voltage VdataCompensation method
It needs to convert paired data voltage by searching for the mode of table after the voltage compensated including calculating every row pixel unit
VdataCompensation.
The system and method for compensation AMOLED display panel internal electric source pressure drop provided in an embodiment of the present invention are by AMOLED
Display panel be divided on the extending direction of power supply voltage signal line the first area being sequentially connected, second area ...,
The total n region in n-th region, each region have 2k+1 row pixel unit, wherein n, k are the positive integer greater than 1；Utilize electricity
The voltage value ELVDD of the first row pixel unit of the first area of pressure detecting unit reading AMOLED display panel and each region
Center row pixel unit actual voltage value ELVDD1~ELVDDn；Using computing unit according to the first row picture of first area
The actual voltage value ELVDD of the center row pixel unit of the voltage value ELVDD and each region of plain unit1~ELVDDnIt calculates
The actual voltage value ELVDD of the center row pixel unit of the voltage value ELVDD and each region of the first row pixel unit1~
ELVDDnVoltage difference delta V1~Δ Vn；Recycle correction unit according to voltage difference delta V1~Δ VnCalculating every row pixel unit needs
The voltage to be compensated, and the voltage that every row pixel unit is needed to compensate converts paired data voltage VdataCompensation；The present invention
No setting is required on AMOLED display panel a large amount of pixel unit voltage detecting cabling, simplifies the complexity of peripheral circuit.
The present invention can also effectively compensate for the deviation of the display brightness because of caused by the voltage drop of the too long generation of power supply voltage signal line, mention
The display effect of high AMOLED display panel.
Detailed description of the invention
Fig. 1 is the equivalent circuit structure schematic diagram of existing AMOLED display panel.
Fig. 2 is the system schematic of the compensation AMOLED display panel internal electric source pressure drop of present pre-ferred embodiments.
The step of Fig. 3 is the method for the compensation AMOLED display panel internal electric source pressure drop of present pre-ferred embodiments signal
Figure.
Specific embodiment
It is of the invention to reach the technical approach and effect that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Accompanying drawings and embodiments, to a specific embodiment of the invention, structure, feature and its effect, detailed description is as follows.
Fig. 2 is the system schematic of the compensation AMOLED display panel internal electric source pressure drop of present pre-ferred embodiments, Fig. 3
It is the step schematic diagram of the method for the compensation AMOLED display panel internal electric source pressure drop of present pre-ferred embodiments, please joins together
Fig. 2 and Fig. 3 are read, the system of compensation AMOLED display panel internal electric source pressure drop includes AMOLED display panel 100, detecting voltage
Unit 200, computing unit 300, correction unit 400 and memory 500.It should be noted that AMOLED display panel 100 includes
Substrate, the multi-strip scanning line being disposed on the substrate and multiple data lines and be connected with scan line and data line in multiple lines and multiple rows
Arranged in matrix multiple pixel units, each pixel unit includes pixel-driving circuit, this is ripe for those skilled in the art
Know technology, details are not described herein.
AMOLED display panel 100 further includes power supply chip 110 and a plurality of power supply voltage signal line 120, a plurality of power supply electricity
Pressure signal wire 120 is connect with power supply chip 110, is serially connected with multiple pixel-driving circuits on every power supply voltage signal line 120,
The supply voltage that power supply chip 110 provides is transmitted to by power supply voltage signal line 120 and is serially connected in the power supply voltage signal line 120
On each pixel-driving circuit.A wherein power supply voltage signal line 120 is only symbolically depicted in Fig. 2, the present invention
The system of compensation AMOLED display panel internal electric source pressure drop can pass through a power supply any in AMOLED display panel 100
Voltage signal 120 is implemented.
AMOLED display panel 100 is divided into first be sequentially connected along the extending direction of power supply voltage signal line 120
Region A1, second area A2..., the n-th region AnTotal n region, and each region all has 2k+1 row pixel unit (i.e. often
The line number of the pixel unit in a region is odd number), wherein n, k are the positive integer greater than 1；Wherein first area A1Near electricity
Source chip 110, the n-th region AnIt is farthest from power supply chip 110.
Detecting voltage unit 200 is connected with AMOLED display panel 100, and detecting voltage unit 200 is for reading AMOLED
The first area A of display panel 1001The first row pixel unit voltage value ELVDD and each region center row pixel list
The actual voltage value ELVDD of member1~ELVDDn, and the voltage value of reading is sent to computing unit 300.Specifically, first area
A1The first row pixel unit be one-row pixels unit near power supply chip 110, therefore, first area A1The first row picture
The voltage value ELVDD of plain unit is equal to the supply voltage that power supply chip 110 provides；First area A1Center row pixel unit be
The pixel unit of+1 row of kth, detecting voltage unit 200 read first area A1+ 1 row of kth pixel unit voltage value
ELVDD1；Second area A2The center pixel unit i.e. pixel unit of (2k+1)+k+1 row, detecting voltage unit 200 read
Second area A2(2k+1)+k+1 row pixel unit voltage value ELVDD2；……；N-th region AnCenter pixel list
Member is the pixel unit of (n-1) (2k+1)+k+1 row, and detecting voltage unit 200 reads the n-th region An(n-1) (2k+1)
The voltage value ELVDD of the pixel unit of+k+1 rown。
Computing unit 300 is connected with detecting voltage unit 200, and computing unit 300 is for receiving the reading of detecting voltage unit 200
The first area A taken1The first row pixel unit voltage value ELVDD and each region center row pixel unit practical electricity
Pressure value ELVDD1~ELVDDn, and based on the received voltage value calculate the first row pixel unit voltage value ELVDD and each area
The actual voltage value ELVDD of the center row pixel unit in domain1~ELVDDnVoltage difference delta V1~Δ Vn.Meanwhile computing unit
The 300 voltage difference delta V being also calculated1~Δ VnIt is sent to correction unit 400.
In the present embodiment, computing unit 300 is, for example, subtracter, including the first area with AMOLED display panel 100
A1, second area A2..., the n-th region AnOne-to-one first subtrator MU1, the second subtrator MU2..., n-th
Subtrator MUn, the first subtrator MU1For receiving first area A1Center row pixel unit (+1 row of kth) practical electricity
Pressure value ELVDD1With first area A1The first row pixel unit voltage value ELVDD and calculate first area A1The first row
The voltage value ELVDD and first area A of pixel unit1Center row pixel unit actual voltage value ELVDD1Voltage difference delta
V1；Second subtrator MU2For receiving second area A2Center row pixel unit ((2k+1)+k+1 row) virtual voltage
Value ELVDD2With first area A1The first row pixel unit voltage value ELVDD and calculate first area A1The first row picture
The voltage value ELVDD and second area A of plain unit2Center row pixel unit actual voltage value ELVDD2Voltage difference delta
V2；……；N-th subtrator MUnFor receiving the n-th region AnCenter row pixel unit ((n-1) (2k+1)+k+1 row)
Actual voltage value ELVDDnWith first area A1The first row pixel unit voltage value ELVDD and calculate first area A1's
The voltage value ELVDD of the first row pixel unit and the n-th region AnCenter row pixel unit actual voltage value ELVDDnVoltage
Poor Δ Vn。
Correction unit 400 is connected with computing unit 300, and correction unit 400 is used to receive the voltage of the calculating of computing unit 300
Poor Δ V1~Δ Vn, voltage difference delta V based on the received1~Δ VnCalculate every row pixel unit of AMOLED display panel 100
Pressure dropThe pressure dropIt is the voltage that every row pixel unit needs to compensate, corrects unit
Every row pixel unit is needed the voltage compensated to convert paired data voltage V by searching for the mode of table by 400 againdataCompensation,
Finally by compensated data voltage VdataIt exports to every row pixel unit of AMOLED display panel 100.
Hold above-mentioned, the calculation method of correction unit 400 are as follows: in first area A1In, according to the voltage difference delta V of+1 row of kth1
Average pressure drop before calculating between the every two rows pixel unit of k row pixel unitThen according to preceding k row pixel unit every two
Average pressure drop between row pixel unitWith the voltage difference delta V of+1 row of kth1Calculate first area A1Each row pixel unit
Pressure dropIn second area A2In, according to the voltage difference delta V of (2k+1)+k+1 row2(2k+ before calculating
1) average pressure drop between the every two rows pixel unit of+k row pixel unitThen (2k+1)+k row pixel unit is every before
Average pressure drop between two row pixel unitsWith the voltage difference delta V of (2k+1)+k+1 row2Calculate second area A2Each row
The pressure drop of pixel unitAnd so on, calculate voltage that every row pixel unit needs to compensate (i.e.
The pressure drop of every row pixel unit of AMOLED display panel 100)。
Specifically, first area A1In: Wherein
Second area A2In: Wherein
……
In (n-1)th region (not shown): Wherein
N-th region AnIn: Wherein
Memory 500 is connected with correction unit 400, and memory 500 is used to store each row picture of AMOLED display panel 100
The pressure drop of plain unitSpecifically, unit 400 is corrected by each of the AMOLED display panel 100 being calculated
The pressure drop of row pixel unitIt is stored into memory 500, and the electricity inside compensation AMOLED display panel
The system of source pressure drop is being needed to data voltage VdataWhen compensating, unit 400 is corrected by reading from memory 500
The pressure drop of every row pixel unit of AMOLED display panel 100Convert paired data voltage VdataCompensation.
The invention further relates to a kind of methods for compensating the internal electric source pressure drop of AMOLED display panel, as shown in figure 3, on providing
The system for the compensation AMOLED display panel internal electric source pressure drop stated, which includes AMOLED display panel 100, detecting voltage
Unit 200, computing unit 300, correction unit 400 and memory 500.AMOLED display panel 100 includes 110 He of power supply chip
A plurality of power supply voltage signal line 120, a plurality of power supply voltage signal line 120 are connect with power supply chip 110, every power supply voltage signal
Multiple pixel-driving circuits are serially connected on line 120, the supply voltage that power supply chip 110 provides passes through power supply voltage signal line
120 are transmitted to each pixel-driving circuit being serially connected on the power supply voltage signal line 120.By AMOLED display panel 100
The first area A being sequentially connected is divided into along the extending direction of power supply voltage signal line 1201, second area A2..., the n-thth area
Domain AnTotal n region, and each region all have 2k+1 row pixel unit (line number of the pixel unit in i.e. each region for surprise
Number), wherein n, k are the positive integer greater than 1；Wherein first area A1Near power supply chip 110, the n-th region AnFrom power supply core
Piece 110 is farthest.
The method of compensation AMOLED display panel internal electric source pressure drop specifically comprises the following steps:
Step S1: first area A is read1The first row pixel unit voltage value ELVDD and each region center row
The actual voltage value ELVDD of pixel unit1~ELVDDn。
Specifically, along the extending direction of power supply voltage signal line 120 by the multirow pixel unit of AMOLED display panel 100
It is divided into n region, as shown in Fig. 2, each region is illustrated as first area A1, second area A2..., the n-th region An, and
Make each region that there is 2k+1 row pixel unit (the line number odd number of the pixel unit in i.e. each region)；Wherein first area A1
Near power supply chip 110, the n-th region AnFarthest away from power supply chip 110.
First area A is read respectively1The first row pixel unit voltage value ELVDD and each region center row pixel
The actual voltage value ELVDD of unit1~ELVDDn.Wherein, first area A1The voltage value ELVDD of the first row pixel unit etc.
In the voltage value that power supply chip 110 exports；First area A1Center pixel unit, that is,+1 row of kth pixel unit, read the
One region A1+ 1 row of kth pixel unit voltage value ELVDD1；Second area A2Center pixel unit i.e. (2k+1)+k
The pixel unit of+1 row reads second area A2(2k+1)+k+1 row pixel unit voltage value ELVDD2；……；N-th
Region AnThe center pixel unit i.e. pixel unit of (n-1) (2k+1)+k+1 row, read the n-th region An(n-1) (2k+
1) the voltage value ELVDD of the pixel unit of+k+1 rown。
Step S2: first area A is calculated separately out1The first row pixel unit voltage value ELVDD and each region
The actual voltage value ELVDD of center row pixel unit1~ELVDDnVoltage difference delta V1~Δ Vn。
Specifically, calculating separately out first area A using computing unit 3001The first row pixel unit voltage value
The actual voltage value ELVDD of ELVDD and the center row pixel unit in each region1~ELVDDnVoltage difference delta V1~Δ Vn.Meter
Calculating unit 300 is, for example, subtracter, including the first area A with AMOLED display panel 1001, second area A2..., n-th
Region AnOne-to-one first subtrator MU1, the second subtrator MU2..., the n-th subtrator MUn, the first subtraction list
First MU1For receiving first area A1Center row pixel unit (+1 row of kth) actual voltage value ELVDD1With first area A1
The first row pixel unit voltage value ELVDD and calculate first area A1The first row pixel unit voltage value ELVDD
With first area A1Center row pixel unit actual voltage value ELVDD1Voltage difference delta V1；Second subtrator MU2For
Receive second area A2Center row pixel unit ((2k+1)+k+1 row) actual voltage value ELVDD2With first area A1's
The voltage value ELVDD of the first row pixel unit simultaneously calculates first area A1The first row pixel unit voltage value ELVDD with
Second area A2Center row pixel unit actual voltage value ELVDD2Voltage difference delta V2；……；N-th subtrator MUnWith
In the n-th region A of receptionnCenter row pixel unit ((n-1) (2k+1)+k+1 row) actual voltage value ELVDDnWith the firstth area
Domain A1The first row pixel unit voltage value ELVDD and calculate first area A1The first row pixel unit voltage value
ELVDD and the n-th region AnCenter row pixel unit actual voltage value ELVDDnVoltage difference delta Vn。
Step S3: according to voltage difference delta V1~Δ VnCalculate the voltage that every row pixel unit needs to compensate.
Specifically, the voltage that every row pixel unit needs to compensate is calculated using correction unit 400, correction unit 400
Calculation method is as follows: according to first area A1The voltage difference delta V of+1 row of kth1The every two rows pixel list of k row pixel unit before calculating
Average pressure drop between memberThen basisWith Δ V1Calculate first area A1The pressure drop of each row pixel unitAccording to second area A2The voltage difference delta V of (2k+1)+k+1 row2(2k+1)+k row pixel before calculating
Average pressure drop between the every two rows pixel unit of unitThen basisWith Δ V2Calculate second area A2Each row picture
The pressure drop of plain unitAnd so on, calculate voltage (i.e. every row picture that every row pixel unit needs to compensate
The pressure drop of plain unit)。
Specifically, first area A1In: Wherein
Second area A2In: Wherein
……
In (n-1)th region (not shown): Wherein
N-th region AnIn: Wherein
Step S4: the voltage that every row pixel unit is needed to compensate converts paired data voltage VdataCompensation, will compensate
Data voltage V afterwardsdataIt exports and gives AMOLED display panel.
In the present invention, the pressure drop of every row pixel unit of AMOLED display panel 100 is stored using memory 500Specifically, unit 400 is corrected by the every row pixel unit for the AMOLED display panel 100 being calculated
Pressure dropIt is stored into memory 500, and when the system of compensation AMOLED display panel internal electric source pressure drop
It is needing to data voltage VdataWhen compensating, correction unit 400 from memory 500 by reading AMOLED display panel
The pressure drop of 100 every row pixel unitAnd paired data voltage V is converted by searching for the mode of tabledata's
Compensation.Finally by compensated data voltage VdataIt exports and gives AMOLED display panel.
The beneficial effects of the present invention are: compensation AMOLED display panel internal electric source pressure drop provided in an embodiment of the present invention
AMOLED display panel is divided into first be sequentially connected by system and method on the extending direction of power supply voltage signal line
Region, second area ..., the total n region in the n-th region, each region have 2k+1 row pixel unit, wherein n, k are big
In 1 positive integer；The electricity of the first row pixel unit of the first area of AMOLED display panel is read using detecting voltage unit
The actual voltage value ELVDD of pressure value ELVDD and the center row pixel unit in each region1~ELVDDn；Using computing unit according to
The actual voltage value of the center row pixel unit of the voltage value ELVDD and each region of the first row pixel unit of first area
ELVDD1~ELVDDnCalculate the reality of the voltage value ELVDD of the first row pixel unit and the center row pixel unit in each region
Border voltage value ELVDD1~ELVDDnVoltage difference delta V1~Δ Vn；Recycle correction unit according to voltage difference delta V1~Δ VnIt calculates
Every row pixel unit needs the voltage compensated out, and the voltage that every row pixel unit is needed to compensate converts paired data voltage
VdataCompensation；The present invention no setting is required on AMOLED display panel a large amount of pixel unit voltage detecting cabling, simplifies
The complexity of peripheral circuit.The present invention can also be effectively compensated for because of caused by the voltage drop of the too long generation of power supply voltage signal line
The deviation of display brightness improves the display effect of AMOLED display panel.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
It is right according to the technical essence of the invention for the equivalent embodiment of equivalent variations, but without departing from the technical solutions of the present invention
Any simple modification, equivalent change and modification made by above embodiments, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of system for compensating the internal electric source pressure drop of AMOLED display panel, including AMOLED display panel (100), voltage are detectd
Survey unit (200), computing unit (300) and correction unit (400)；The AMOLED display panel (100) includes power supply chip
(110), it at least one power supply voltage signal line (120) that is connected with the power supply chip (110) and is sequentially connected in series in described
Multirow pixel unit on power supply voltage signal line (120)；It is characterized in that, the AMOLED display panel (100) is described
First area (the A being sequentially connected is divided on the extending direction of power supply voltage signal line (120)1), second area
(A2) ..., the n-th region (An) total n region, each region has 2k+1 row pixel unit, wherein n, k are greater than 1
Positive integer；
The detecting voltage unit (200) is used to read the first area (A of the AMOLED display panel (100)1)
The actual voltage value ELVDD of the center row pixel unit of the voltage value ELVDD and each region of one-row pixels unit1~ELVDDn,
And the voltage value of reading is sent to the computing unit (300)；
The computing unit (300) is used to receive the first area (A that the detecting voltage unit (200) is read1) first
The actual voltage value ELVDD of the voltage value ELVDD of row pixel unit and the center row pixel unit in each region1~
ELVDDn, and based on the received voltage value calculate the first row pixel unit voltage value ELVDD and each region
Center row pixel unit actual voltage value ELVDD1~ELVDDnVoltage difference delta V1~Δ VnAnd it is single to be sent to the correction
First (400)；
Correction unit (400) is used to receive the voltage difference delta V of the computing unit (300) calculating1~Δ VnAnd according to described
Voltage difference delta V1~Δ VnThe voltage that every row pixel unit needs to compensate is calculated, and every row pixel unit is needed to compensate
Voltage convert paired data voltage VdataCompensation.
2. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 1, which is characterized in that described
Correct the calculation method of unit (400) are as follows: in the first area (A1) in, according to the voltage difference delta V of+1 row of kth1Before calculating
Average pressure drop between the every two rows pixel unit of k row pixel unitThen according to the preceding every two rows picture of k row pixel unit
Average pressure drop between plain unitWith the voltage difference delta V of+1 row of kth1Calculate the first area (A1) each row picture
The pressure drop of plain unitIn the second area (A2) in, according to the voltage difference delta V of (2k+1)+k+1 row2
Average pressure drop before calculating between the every two rows pixel unit of (2k+1)+k row pixel unitThen according to (2k+ before described
1) average pressure drop between the every two rows pixel unit of+k row pixel unitWith the voltage difference delta of (2k+1)+k+1 row
V2Calculate the second area (A2) each row pixel unit pressure dropAnd so on, calculate AMOLED
The pressure drop of every row pixel unit in display panel (100)In the AMOLED display panel (100)
The pressure drop of every row pixel unitIt is the voltage that every row pixel unit needs to compensate.
3. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 2, which is characterized in that described
First area (A1) in: Wherein
Second area (the A2) in: Wherein
……
In (n-1)th region: Wherein
N-th region (the An) in: Wherein
4. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 3, which is characterized in that described
The system for compensating the internal electric source pressure drop of AMOLED display panel further includes memory (500), the memory (500) and the school
Positive unit (400) is connected, and the memory (500) is used to store every row pixel of the AMOLED display panel (100)
The pressure drop of unitThe correction unit (400) passes through described in the reading from the memory (500)
The pressure drop of every row pixel unit of AMOLED display panel (100)Convert paired data voltage VdataBenefit
It repays.
5. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 1, which is characterized in that described
Correction unit (400) calculates every row pixel unit and needs to be converted into logarithm by searching for the mode of table after the voltage compensated
According to voltage VdataCompensation.
6. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 1, which is characterized in that described
First area (A1) close to the power supply chip (110), the n-th region (An) far from power supply chip (110), firstth area
Domain (A1) the first row pixel unit be one-row pixels unit near the power supply chip (110).
7. the system of compensation AMOLED display panel internal electric source pressure drop according to claim 1, which is characterized in that described
Computing unit (300) is subtracter, including the first area (A with the AMOLED display panel (100)1), second area
(A2) ..., the n-th region (An) one-to-one first subtrator (MU1), the second subtrator (MU2) ..., n-th subtract
Method unit (MUn), the first subtrator (MU1) for receiving the first area (A1) center row pixel unit reality
Border voltage value ELVDD1With the first area (A1) the first row pixel unit voltage value ELVDD and calculate described first
Region (A1) the first row pixel unit voltage value ELVDD and the first area (A1) center row pixel unit reality
Voltage value ELVDD1Voltage difference delta V1；Second subtrator (the MU2) for receiving the second area (A2) center row
The actual voltage value ELVDD of row pixel unit2With the first area (A1) the first row pixel unit voltage value ELVDD simultaneously
Calculate the first area (A1) the first row pixel unit voltage value ELVDD and the second area (A2) center row
The actual voltage value ELVDD of pixel unit2Voltage difference delta V2；……；N-th subtrator (the MUn) for receiving described the
The region n (An) center row pixel unit actual voltage value ELVDDnWith the first area (A1) the first row pixel unit
Voltage value ELVDD and calculate the first area (A1) the first row pixel unit voltage value ELVDD and n-thth area
Domain (An) center row pixel unit actual voltage value ELVDDnVoltage difference delta Vn。
8. a kind of method for compensating the internal electric source pressure drop of AMOLED display panel characterized by comprising provide such as claim
The system of 1~7 described in any item compensation AMOLED display panel internal electric source pressure drops, by AMOLED display panel (100) edge
The extending direction of power supply voltage signal line (120) is divided into the first area (A being sequentially connected1), second area (A2) ...,
The region n (An) total n region, and each region is made to all have 2k+1 row pixel unit, wherein n, k are the positive integer greater than 1；
Read first area (A1) the first row pixel unit voltage value ELVDD and each region center row pixel unit
Actual voltage value ELVDD1~ELVDDn；
Calculate separately out first area (A1) the first row pixel unit voltage value ELVDD and each region center row pixel
The actual voltage value ELVDD of unit1~ELVDDnVoltage difference delta V1~Δ Vn；
According to voltage difference delta V1~Δ VnCalculate the voltage that every row pixel unit of AMOLED display panel (100) needs to compensate；
And
The voltage that every row pixel unit is needed to compensate converts paired data voltage VdataCompensation.
9. the method for compensation AMOLED display panel internal electric source pressure drop according to claim 8, which is characterized in that according to
Voltage difference delta V1~Δ VnCalculate the method packet of voltage that every row pixel unit of AMOLED display panel (100) needs to compensate
It includes: according to first area (A1) kth+1 row voltage difference delta V1Before calculating between the every two rows pixel unit of k row pixel unit
Average pressure dropThen according to the average pressure drop between the every two rows pixel unit of preceding k row pixel unitWith+1 row of kth
Voltage difference delta V1Calculate first area (A1) each row pixel unit pressure dropAccording to second area (A2)
The voltage difference delta V of (2k+1)+k+1 row2Being averaged between the every two rows pixel unit of (2k+1)+k row pixel unit before calculating
Pressure dropThen the average pressure drop before between the every two rows pixel unit of (2k+1)+k row pixel unitWith (2k+
1) the voltage difference delta V of+k+1 row2Calculate second area (A2) each row pixel unit pressure dropWith such
It pushes away, calculates the pressure drop of every row pixel unit in AMOLED display panel (100)The AMOLED is aobvious
Show the pressure drop of every row pixel unit in panel (100)It is the voltage that every row pixel unit needs to compensate.
10. the method for compensation AMOLED display panel internal electric source pressure drop according to claim 8, which is characterized in that will
The voltage conversion paired data voltage V that every row pixel unit needs to compensatedataCompensation method include calculate every row
Paired data voltage V is converted after the voltage that pixel unit needs compensate by searching for the mode of tabledataCompensation.
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| CN107665670B (en) * | 2017-10-10 | 2019-10-18 | 深圳市华星光电半导体显示技术有限公司 | OLED display |
| CN108492766B (en) * | 2018-01-19 | 2020-02-07 | 昆山国显光电有限公司 | Compensation voltage calculation method and device, compensation method and system and driving chip |
| US10796629B2 (en) * | 2018-07-31 | 2020-10-06 | Apple Inc. | Display panel voltage drop correction |
| CN112639945A (en) * | 2018-09-21 | 2021-04-09 | 深圳市柔宇科技股份有限公司 | Display device and display driving method thereof |
| CN109243374A (en) * | 2018-11-29 | 2019-01-18 | 昆山国显光电有限公司 | The voltage-drop compensation system and method for display panel internal electric source |
| CN109377935B (en) * | 2018-12-10 | 2022-04-15 | 京东方科技集团股份有限公司 | Brightness compensation method and device and electroluminescent display device |
| CN109377947A (en) * | 2018-12-13 | 2019-02-22 | 武汉华星光电半导体显示技术有限公司 | Display device and its driving method |
| WO2020133240A1 (en) * | 2018-12-28 | 2020-07-02 | 深圳市柔宇科技有限公司 | Display screen and display device |
| CN111862891B (en) * | 2019-04-25 | 2021-10-01 | 上海和辉光电股份有限公司 | Organic light emitting display |
| CN110444164A (en) * | 2019-08-16 | 2019-11-12 | 京东方科技集团股份有限公司 | A kind of adjustment method and debugging apparatus of display device |
| CN110992884B (en) * | 2019-12-24 | 2021-07-09 | 武汉天马微电子有限公司 | Display panel, display device and detection compensation method of display panel |
| CN111028777B (en) * | 2019-12-31 | 2021-12-07 | 武汉天马微电子有限公司 | Display device and control method thereof |
| US11295674B2 (en) * | 2020-03-27 | 2022-04-05 | Novatek Microelectronics Corp. | Image compensation circuit and related compensation method |
| CN111402812B (en) * | 2020-04-27 | 2021-11-16 | 京东方科技集团股份有限公司 | Adjusting module, testing method and display device |
| CN114582285B (en) * | 2022-05-06 | 2022-11-15 | 惠科股份有限公司 | Drive circuit, display device and debugging method |
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| CN104050915B (en) * | 2014-05-30 | 2015-06-03 | 京东方科技集团股份有限公司 | AMOLED display panel and AMOLED display device |
| CN104078006B (en) * | 2014-06-27 | 2016-04-13 | 京东方科技集团股份有限公司 | Image element circuit, display panel and display device |
| CN104464621B (en) * | 2014-11-14 | 2017-01-25 | 深圳市华星光电技术有限公司 | Compensation AMOLED power supply voltage-drop method |
| CN104464630B (en) * | 2014-12-23 | 2018-07-20 | 昆山国显光电有限公司 | Pixel circuit and its driving method and active matrix/organic light emitting display |
| CN104867455B (en) * | 2015-06-16 | 2017-05-03 | 深圳市华星光电技术有限公司 | System and method for compensating AMOLED voltage drop |
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