CN107068061A - The driving method and device of AMOLED panel - Google Patents
The driving method and device of AMOLED panel Download PDFInfo
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- CN107068061A CN107068061A CN201710459316.0A CN201710459316A CN107068061A CN 107068061 A CN107068061 A CN 107068061A CN 201710459316 A CN201710459316 A CN 201710459316A CN 107068061 A CN107068061 A CN 107068061A
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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
- G09G3/3233—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 with pixel circuitry controlling the current through the light-emitting element
Abstract
The present invention relates to a kind of driving method of AMOLED panel and device.The driving method of the AMOLED panel includes:The temperature of step 10, detecting display panel detecting point;Step 20, the temperature according to default display panel calculate corresponding driving current at this temperature with the functional relation of driving current;Step 30, driving current is compared to the compensating gain for obtaining driving current with default threshold current;Step 40, according to the compensating gain of driving current the data-signal and gamma signals that drive display panel are adjusted;The brightness of step 50, in real time detection display panel, when brightness decay is to predetermined threshold value, by improving driving current by luminance compensation to original intensity.Present invention also offers corresponding device.The present invention proposes the driving method and device of a kind of AMOLED panel, under the premise of panel driving electric current is constant, by OLED life-span upgrading algorithms, can extend the service life of oled panel, and then ensures the accuracy of the life-span upgrading model of OLED.
Description
Technical field
The present invention relates to the driving method and device of field of liquid crystal, more particularly to a kind of AMOLED panel.
Background technology
Organic Light Emitting Diode (OLED) display device has self-luminous, and driving voltage is low, and luminous efficiency is high, the response time
It is short, many advantages, such as temperature in use scope is wide, it is the display device for most having development potentiality to be known as by industry.
OLED display, which installs type of drive, can be divided into passive matrix OLED (PMOLED) and active array type
The major classes of OLED (AMOLED) two, wherein, AMOLED has the sub-pixel arranged in array, belongs to active display type, lights
Efficiency is high, is generally used for the large scale display device of fine definition.Each luminescence unit in AMOLED is by thin film transistor (TFT)
(TFT) independent control is addressed.The dot structure of luminescence unit and TFT addressing circuits composition needs to add it by power signal line
Direct current power source voltage (OVDD) is carried to be driven.
But, also there is luminance degradation and life time decay, it is necessary to take steps to extend its life-span in current OLED.Figure
1 is existing OLED lifes principle schematic, and as shown in solid lines in fig. 1, transverse axis is the time to OLED brightness decay curves
(time), the longitudinal axis is brightness;Life-span compensates as shown in phantom in Figure 1, (default to original intensity x% when detecting brightness decay
Value) when, by improving OLED driving currents by its luminance compensation to original intensity.In the OLED courses of work, by constantly examining
The driving current surveyed and improve constantly OLED makes OLED brightness return to L0。
Fig. 2 is existing OLED life-span upgradings algorithm flow chart.This OLED life-span upgrading algorithm is in perseverance according to OLED
The brightness set up during stream driving and time age compensation model:OLED brightness time relationships are solved first, obtain expression formula, can
Solved by the method being fitted to the attenuation curve in Fig. 1;Then the expression formula of OLED attenuation degrees is defined;Connect down
Can just calculate any time OLED attenuation degree;Then it is compared to determine the need for improving with default threshold value
The electric current of OLED has recovered brightness.In the expression formula listed in Fig. 2, L represents brightness, L0Original intensity is represented, t is represented
Time, remaining parameter is the constant coefficient that curve matching is obtained.But panel is in real work, due to the lifting of panel temperature, meeting
Driving current is set to become big, deviation occur in the brightness and time age compensation model for causing OLED.Therefore, a kind of AMOLED faces are needed badly
The driving method of plate, the life-span for extending AMOLED panel avoids OLED brightness and time age compensation model from occurring partially simultaneously
Difference.
The content of the invention
Therefore, can be in extension AMOLED faces it is an object of the invention to provide a kind of driving method of AMOLED panel
The life-span of plate avoids OLED brightness and time age compensation model from deviation occur simultaneously.
A further object of the present invention is to provide a kind of drive device of AMOLED panel, can be in extension AMOLED panel
Life-span simultaneously avoid OLED brightness and time age compensation model from deviation occur.
To achieve the above object, the present invention provides a kind of driving method of AMOLED panel, including:
The temperature of step 10, detecting display panel detecting point;
Step 20, the temperature according to default display panel calculate corresponding at this temperature with the functional relation of driving current
Driving current;
Step 30, driving current is compared to the compensating gain for obtaining driving current with default threshold current;
Step 40, data-signal and the progress of gamma signals according to the compensating gain of driving current to driving display panel
Regulation;
The brightness of step 50, in real time detection display panel, when brightness decay is to predetermined threshold value, by improving driving current
By luminance compensation to original intensity.
Wherein, in step 50, the degree of brightness decay is calculated by brightness and time age compensation model.
Wherein, calculating the process of the degree of brightness decay includes:
The expression formula of OLED brightness time relationships is solved according to OLED brightness decay curves first;
Then obtain defining the expression formula of OLED attenuation degrees according to the expression formula of OLED brightness time relationships;
Finally obtain the formula for calculating any time OLED attenuation degree.
Wherein, the expression formula of the OLED brightness time relationships is drawn by curve-fitting method.
Wherein, any time OLED attenuation degree a=exp (- ((t0L0 n+……+tmLm n)/C)β), wherein, tmRepresent
With brightness LmThe time lighted, m represents the quantity of the period with different brightness, and C and β are constant coefficient.
Present invention also offers a kind of drive device of AMOLED panel, including:
Detecting module, the temperature for detecting display panel detecting point;
Computing module, the temperature is calculated for the temperature and the functional relation of driving current according to default display panel
Under corresponding driving current;
Comparison module, the compensating gain of driving current is obtained for driving current to be compared with default threshold current;
Adjustment module, believes the data-signal and gamma that drive display panel for the compensating gain according to driving current
Number it is adjusted;
Compensating module, the brightness for detecting display panel in real time, when brightness decay is to predetermined threshold value, is driven by improving
Streaming current is by luminance compensation to original intensity.
Wherein, in the compensating module, the degree of brightness decay is calculated by brightness and time age compensation model.
Wherein, calculating the process of the degree of brightness decay includes:
The expression formula of OLED brightness time relationships is solved according to OLED brightness decay curves first;
Then obtain defining the expression formula of OLED attenuation degrees according to the expression formula of OLED brightness time relationships;
Finally obtain the formula for calculating any time OLED attenuation degree.
Wherein, the expression formula of the OLED brightness time relationships is drawn by curve-fitting method.
Wherein, any time OLED attenuation degree a=exp (- ((t0L0 n+……+tmLm n)/C)β), wherein, tmRepresent
With brightness LmThe time lighted, m represents the quantity of the period with different brightness, and C and β are constant coefficient.
To sum up, the present invention proposes a kind of driving method for the AMOLED panel that temperature control and OLED life-span upgradings are combined
And device, under the premise of panel driving electric current is constant, by OLED life-span upgrading algorithms, the use longevity of oled panel can be extended
Life, and then ensure the accuracy of the life-span upgrading model of OLED.
Brief description of the drawings
Below in conjunction with the accompanying drawings, it is described in detail by the embodiment to the present invention, technical scheme will be made
And other beneficial effects are apparent.
In accompanying drawing,
Fig. 1 is existing OLED lifes principle schematic;
Fig. 2 is existing OLED life-span upgradings algorithm flow chart;
Fig. 3 is the flow chart of the driving method of AMOLED panel of the present invention;
Fig. 4 shows for the regulating effect of current temperature relation in the preferred embodiment of driving method one of AMOLED panel of the present invention
It is intended to.
Embodiment
Referring to Fig. 3, it is the flow chart of the driving method of AMOLED panel of the present invention.Oled panel in real work,
Due to the lifting of panel temperature, driving current can be made to become big, deviation occur in the brightness and time age compensation model for causing OLED,
Therefore the present invention carries out temperature detecting and electric current regulation in panel driving, it is ensured that OLED is operated in constant current mode in panel.
The invention mainly comprises:
The temperature of step 10, detecting display panel detecting point.Can be by setting temperature detecting in the logic card of panel
Module carrys out detecting real-time temperature.
Step 20, the temperature according to default display panel calculate corresponding at this temperature with the functional relation of driving current
Driving current.Respective function relation can be drawn previously according to the relation curve fitting of temperature and driving current, according to function
Relation calculates the driving current under specified temp.
Step 30, driving current is compared to the compensating gain for obtaining driving current with default threshold current.After comparing
Determine the need for compensating driving current, to realize the constant of panel driving electric current.
Step 40, data-signal and the progress of gamma signals according to the compensating gain of driving current to driving display panel
Regulation.Referring to Fig. 4, it is imitated for the regulation of current temperature relation in the preferred embodiment of driving method one of AMOLED panel of the present invention
Fruit schematic diagram, electric current increases with temperature before adjustment, constant current hold after adjustment.
The brightness of step 50, in real time detection display panel, when brightness decay is to predetermined threshold value, by improving driving current
By luminance compensation to original intensity.In step 50, the degree of brightness decay can be old by brightness and time as shown in fig. 2
Change compensation model to calculate.Calculating the process of the degree of brightness decay can include:Asked first according to OLED brightness decay curves
Solve the expression formula of OLED brightness time relationships;Then definition OLED is obtained according to the expression formula of OLED brightness time relationships to decline
Subtract the expression formula of degree;Finally obtain the formula for calculating any time OLED attenuation degree, any time OLED decay journey
Spend a=exp (- ((t0L0 n+……+tmLm n)/C)β), wherein, tmRepresent with brightness LmThe time lighted, m, which is represented, has difference
The quantity of the period of brightness, C and β are the constant coefficient determined by specific panel characteristics.When detecting brightness decay to initial bright
When spending x% (preset value), by improving OLED driving currents by its luminance compensation to original intensity.In the OLED courses of work,
OLED brightness is set to return to L by constantly detecting and improving constantly OLED driving current0。
The present invention proposes the driving method that a kind of temperature control and OLED life-span upgradings are combined.Can patrolling in liquid crystal panel
Collecting increases temperature detection module and temperature control modules to realize temperature adjustment algorithm in plate, regulation and control panel driving electric current falls in threshold
It is worth in current range, reaches the purpose of regulation and control panel temperature;The driving method is detected and adjusted by opposite plate temperature, is made
Panel driving electric current is constant, and then ensures the accuracy of the life-span upgrading model of OLED.
According to the driving method of AMOLED panel of the present invention, present invention also offers the driving of corresponding AMOLED panel dress
Put, the function of the drive device realizes that the method that can refer to the present invention is realized, can specifically include:
Detecting module, the temperature for detecting display panel detecting point;
Computing module, the temperature is calculated for the temperature and the functional relation of driving current according to default display panel
Under corresponding driving current;
Comparison module, the compensating gain of driving current is obtained for driving current to be compared with default threshold current;
Adjustment module, believes the data-signal and gamma that drive display panel for the compensating gain according to driving current
Number it is adjusted;
Compensating module, the brightness for detecting display panel in real time, when brightness decay is to predetermined threshold value, is driven by improving
Streaming current is by luminance compensation to original intensity.
To sum up, the present invention proposes the driving method and device that a kind of temperature control and OLED life-span upgradings are combined, and passes through
Opposite plate temperature is detected, and is regulated and controled the electric current of panel, is made panel driving electric current constant;The driving method and device drive in panel
Under the premise of streaming current is constant, by OLED life-span upgrading algorithms, the service life of oled panel can be extended;The life-span upgrading is calculated
Method, on the premise of excellent image quality is ensured, can extend the service life of oled panel.
It is described above, for the person of ordinary skill of the art, can be with technique according to the invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to appended right of the invention
It is required that protection domain.
Claims (10)
1. a kind of driving method of AMOLED panel, it is characterised in that including:
The temperature of step 10, detecting display panel detecting point;
Step 20, the temperature according to default display panel calculate corresponding drive at this temperature with the functional relation of driving current
Streaming current;
Step 30, driving current is compared to the compensating gain for obtaining driving current with default threshold current;
Step 40, according to the compensating gain of driving current the data-signal and gamma signals that drive display panel are adjusted;
The brightness of step 50, in real time detection display panel, will be bright by improving driving current when brightness decay is to predetermined threshold value
Original intensity is arrived in degree compensation.
2. the driving method of AMOLED panel as claimed in claim 1, it is characterised in that in step 50, the journey of brightness decay
Degree is calculated by brightness and time age compensation model.
3. the driving method of AMOLED panel as claimed in claim 2, it is characterised in that calculate the mistake of the degree of brightness decay
Journey includes:
The expression formula of OLED brightness time relationships is solved according to OLED brightness decay curves first;
Then obtain defining the expression formula of OLED attenuation degrees according to the expression formula of OLED brightness time relationships;
Finally obtain the formula for calculating any time OLED attenuation degree.
4. the driving method of AMOLED panel as claimed in claim 3, it is characterised in that the table of the OLED brightness time relationships
Drawn up to formula by curve-fitting method.
5. the driving method of AMOLED panel as claimed in claim 3, it is characterised in that any time OLED attenuation degree
A=exp (- ((t0L0 n+……+tmLm n)/C)β), wherein, tmRepresent with brightness LmThe time lighted, m, which is represented, has difference bright
The quantity of the period of degree, C and β are constant coefficient.
6. a kind of drive device of AMOLED panel, it is characterised in that including:
Detecting module, the temperature for detecting display panel detecting point;
Computing module, it is right at this temperature to be calculated for the temperature and the functional relation of driving current according to default display panel
The driving current answered;
Comparison module, the compensating gain of driving current is obtained for driving current to be compared with default threshold current;
Adjustment module, enters for the compensating gain according to driving current to the data-signal and gamma signals that drive display panel
Row regulation;
Compensating module, the brightness for detecting display panel in real time, when brightness decay is to predetermined threshold value, by improving driving electricity
Flow luminance compensation to original intensity.
7. the drive device of AMOLED panel as claimed in claim 6, it is characterised in that in the compensating module, brightness decay
Degree calculated by brightness and time age compensation model.
8. the drive device of AMOLED panel as claimed in claim 7, it is characterised in that calculate the mistake of the degree of brightness decay
Journey includes:
The expression formula of OLED brightness time relationships is solved according to OLED brightness decay curves first;
Then obtain defining the expression formula of OLED attenuation degrees according to the expression formula of OLED brightness time relationships;
Finally obtain the formula for calculating any time OLED attenuation degree.
9. the drive device of AMOLED panel as claimed in claim 8, it is characterised in that the table of the OLED brightness time relationships
Drawn up to formula by curve-fitting method.
10. the drive device of AMOLED panel as claimed in claim 8, it is characterised in that any time OLED decay journey
Spend a=exp (- ((t0L0 n+……+tmLm n)/C)β), wherein, tmRepresent with brightness LmThe time lighted, m, which is represented, has difference
The quantity of the period of brightness, C and β are constant coefficient.
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CN107610676A (en) * | 2017-09-27 | 2018-01-19 | 上海展扬通信技术有限公司 | The screen brightness control method and screen intensity control system of a kind of intelligent terminal |
CN107863068A (en) * | 2017-12-12 | 2018-03-30 | 京东方科技集团股份有限公司 | Voltage compensating device, voltage compensating method and display device |
CN108510940A (en) * | 2018-05-10 | 2018-09-07 | 昆山国显光电有限公司 | Display screen, the compensation method of brightness of display screen and compensation device |
CN108597442A (en) * | 2018-04-13 | 2018-09-28 | 武汉精测电子集团股份有限公司 | The OLED module Gamma adjusting process and system of mathematical model are associated with based on multiple target |
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CN113811941A (en) * | 2019-05-09 | 2021-12-17 | 深圳云英谷科技有限公司 | Method and system for estimating and compensating for light emitting element aging in a display panel |
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WO2021035407A1 (en) * | 2019-08-23 | 2021-03-04 | 京东方科技集团股份有限公司 | Temperature compensation method for display panel, display panel, and electronic device |
CN110706637A (en) * | 2019-10-28 | 2020-01-17 | 昆山国显光电有限公司 | Display panel brightness compensation method, compensation device and display device |
CN111402801A (en) * | 2019-12-04 | 2020-07-10 | 友达光电股份有限公司 | Pixel compensation circuit and display device |
CN113096575A (en) * | 2021-04-01 | 2021-07-09 | 京东方科技集团股份有限公司 | Service life compensation method and device of display device and display device |
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