CN110310595A - A kind of the service life backoff algorithm and device of organic electroluminescent device OLED - Google Patents
A kind of the service life backoff algorithm and device of organic electroluminescent device OLED Download PDFInfo
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- CN110310595A CN110310595A CN201810260359.0A CN201810260359A CN110310595A CN 110310595 A CN110310595 A CN 110310595A CN 201810260359 A CN201810260359 A CN 201810260359A CN 110310595 A CN110310595 A CN 110310595A
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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]
Abstract
The present invention relates to field of display technology, disclose the service life backoff algorithm and device of a kind of organic electroluminescent device OLED, the service life backoff algorithm of the organic electroluminescent device OLED includes: to light OLED；When the brightness of OLED at the T moment and is stablized when setting brightness, according to the drive signal value driving OLED of setting；Wherein, drive signal value Data (t) meets following equation: Data (t)=a × exp (b × t) × Data (0), wherein a, b are the constant coefficient when the brightness of OLED is to set brightness；Data (0) is the initial driving signal value when lighting OLED under setting brightness；The ratio between brightness decay speed when t is brightness decay total amount of the OLED in 0 to T time section and OLED display setting brightness.The service life backoff algorithm of above-mentioned organic electroluminescent device OLED carries out real-time compensation to OLED using the method adjusted to the OLED drive signal value inputted, extends the service life of OLED, and compensation precision is higher, compensation way is simple and reliable, and cost is relatively low.
Description
Technical field
The present invention relates to field of display technology, in particular to the service life backoff algorithm of a kind of organic electroluminescent device OLED
And device.
Background technique
OLED has self-luminous, fast response time, brightness height, contrast height, advantages of simple structure and simple, is existing display dress
The display product of field favor is set, and OLED shows that product is also gradually applied in people's lives, still, while OLED is also deposited
The brightness decay the problem of, there are many ways to extending the service life of OLED at present, wherein due to technique constantly improve and OLED
The limitation of size has been unable to satisfy application demand by technological compensa tion and internal circuit compensation, so needing one kind can be improved
The compensation method of OLED service life.
Summary of the invention
The present invention provides the service life backoff algorithm and device of a kind of organic electroluminescent device OLED, organic electroluminescence hairs
The service life backoff algorithm of optical device OLED mends OLED to the method for the OLED drive signal value inputted using adjusting in real time
It repays, extends the service life of OLED, and compensation precision is higher, compensation way is simple and reliable, and cost is relatively low.
In order to achieve the above objectives, the present invention the following technical schemes are provided:
A kind of service life backoff algorithm of organic electroluminescent device OLED, comprising:
Light OLED；
When the brightness of the OLED at the T moment and is stablized when setting brightness, according to the drive signal value driving institute of setting
State OLED；Wherein, the drive signal value Data (t) meets following equation:
Data (t)=a × exp (b × t) × Data (0)
Wherein, a, b are the constant coefficient when the brightness of OLED is the setting brightness；Data (0) is in the setting
The initial driving signal value when OLED is lighted under brightness；T is brightness decay of the OLED in 0 to T time section
The ratio between brightness decay speed when total amount and the OLED show the setting brightness.
In the service life backoff algorithm of above-mentioned organic electroluminescent device OLED, after OLED is lighted, using with the aobvious of OLED
Show that the method for the driving signal of time adjustment OLED input compensates OLED, allows the OLED after lighting in the bright of setting
The lower display of degree, wherein need the drive signal value inputted according to formula at the T moment and when setting brightness display: Data (t)=
A × exp (b × t) × Data (0) is calculated, and the Data (t) in formula is to set the driving signal for needing to input when brightness display
Value, Data (0) are the initial driving signal value when lighting OLED under setting brightness, can be obtained by measurement；T is that OLED exists
No matter brightness decay total amount and OLED in 0 to T time section show the ratio between brightness decay speed when setting brightness, i.e.,
How brightness of the OLED within the 0-T period shows state, t be from 0 to T time section in OLED brightness decay total amount not
In the case where change, the brightness decay time in the state that OLED always show setting brightness being converted into, the embodiment of the present invention
The service life backoff algorithm of the organic electroluminescent device OLED of offer can carry out real-time compensation by the driving signal to OLED,
Extend the OLED service life, and compensation precision is higher, in addition, there are many methods by changing the preparation process of OLED in the prior art
To extend the service life of OLED, higher cost, and the service life backoff algorithm of above-mentioned organic electroluminescent device OLED only needs to change
OLED is compensated to the drive signal value of OLED, cost is relatively low, above-mentioned organic electroluminescence device illustrated below
The service life backoff algorithm of OLED.
For example, lighting OLED, the T moment shows setting brightness, wherein display side of the OLED within the period at 0-T moment
There are two types of formulas, wherein indicating the display time after OLED is lighted with t ', i.e. OLED always show setting brightness, mode one: for 0
The brightness of OLED does not change in the period of < t '≤T；Mode two: the brightness of OLED becomes within the period of 0 < t '≤T
Change.
Wherein, OLED display brightness situation be mode one in the case where, it is assumed that OLED is lighted with brightness L, 0 < t '≤
The brightness of OLED is stable always in brightness L in the period of T, then in formula Data (t)=a × exp (b × t) × Data (0)
T=T, then drive signal value Data (T)=a × exp (b × T) × Data (0) of the OLED at T moment and display brightness L,
In, a, b herein is the value of constant coefficient of the OLED at brightness L, and Data (0) herein is to light OLED's at brightness L1
Initial driving signal value to the T moment again and is stablized in brightness L that is, after OLED is lighted, gives OLED input drive signal value
Data (T)=a × exp (b × T) × Data (0).
OLED is in the case where display brightness situation is mode two, it is assumed that OLED is with brightness L1It lights, and in 0 < t '≤T
One-shot change occurs for the brightness of OLED in period, i.e., in 0 < t '≤T1Display brightness L in time section1, in T1< t '≤T
It is stable always in brightness L2 in period, then at this time in formula Data (t)=a × exp (b × t) × Data (0)The then drive signal value at T moment and display brightness L Wherein, a herein1、b1For OLED
The value of constant coefficient at brightness L1, a2、b2It is OLED in brightness L2Under constant coefficient value, Data (0) herein be
Brightness L2Under light the initial driving signal value of OLED, i.e., after OLED is lighted, at the T moment and stablize in brightness L2, give
OLED input drive signal value
It should be noted that above-mentioned OLED is in the case where display brightness situation is mode two, OLED is in 0 < t '≤T
Between in section the brightness of OLED repeatedly variation occurs, and show setting brightness at the T moment, it is first according to the algorithm in aforesaid way two
Conversion obtains the value of t in formula, and then can obtain the drive signal value at T moment and display setting brightness, specific to calculate
Process occurs that the algorithm of a brightness change is similar, and details are not described herein with the example above OLED in 0 < t '≤T time section.
The service life backoff algorithm of above-mentioned organic electroluminescent device OLED, the drive signal value inputted using adjusting to OLED
Method to OLED carry out real-time compensation, extend the service life of OLED, and compensation precision is higher, compensation way is simple and reliable, cost
It is lower.
Preferably, obtaining the method for setting constant coefficient a, b under brightness includes:
The OLED is lighted, and maintains the brightness all-the-time stable of the OLED in the setting brightness；
The measured value of the driving signal of the OLED is detected and obtained in different moments；And use formula: Data (t)=a
× exp (b × t) × Data (0) calculates the calculated value of the driving signal of OLED at the time of obtaining corresponding；
The measured value according to multiple groups and corresponding calculated value application least square method obtain normal under the setting brightness
Number system number a, b.
Preferably, using the method acquisition OLED for obtaining constant coefficient a, b under setting brightness, each is bright
Constant coefficient a, b under angle value, the brightness value are natural number.
Preferably, the OLED selection are obtained using the method for obtaining constant coefficient a, b under setting brightness more
Constant coefficient a, b under the brightness value at a interval；
The OLED is obtained not according to constant coefficient a, b application interpolation method under the brightness value at the multiple interval of acquisition
Constant coefficient a, b under the brightness value of selection, it is described bright to obtain constant coefficient a, b under each brightness value of the OLED
Angle value is natural number.
Preferably, the driving signal includes driving voltage or driving current.
The present invention also provides a kind of devices of service life backoff algorithm for organic electroluminescent device OLED, comprising:
For detecting the brightness of OLED and storing the brightness calculation module of brightness value；
It is connect with the brightness calculation module and is used to calculate after the OLED is lighted at the T moment and stablizes bright in setting
The driving signal computing module of driving signal when spending；
And the driving signal computing module connects and for inputting drive corresponding with the setting brightness to the OLED
The output module of dynamic signal value.
Preferably, the driving signal includes driving voltage or driving current.
Detailed description of the invention
Fig. 1 is the process signal of the service life backoff algorithm of organic electroluminescent device OLED provided in an embodiment of the present invention
Figure；
Fig. 2 is to be become at any time in the embodiment of the present invention according to drive signal value of the OLED of measurement acquisition in the case where setting brightness
The schematic diagram of the curve of change.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, a kind of service life backoff algorithm of organic electroluminescent device OLED provided in an embodiment of the present invention, packet
It includes:
Step S101, lights OLED；
Step S102, when the brightness of OLED at the T moment and is stablized when setting brightness, according to the drive signal value of setting
Drive OLED；Wherein, drive signal value Data (t) meets following equation:
Data (t)=a × exp (b × t) × Data (0)
Wherein, a, b are the constant coefficient when the brightness of OLED is to set brightness；Data (0) is the point in the case where setting brightness
Initial driving signal value when bright OLED；T shows with OLED for brightness decay total amount of the OLED in 0 to T time section and sets
Determine the ratio between brightness decay speed when brightness.
In the service life backoff algorithm of above-mentioned organic electroluminescent device OLED, according to step S101, after OLED is lighted, root
According to step S102, OLED is compensated using the method for the driving signal of the display time adjustment OLED input with OLED, is made
OLED after lighting can be shown under the brightness of setting, wherein at the T moment and set the drive for needing to input when brightness display
Signal value is moved according to formula: Data (t)=a × exp (b × t) × Data (0) is calculated, and the Data (t) in formula is bright in setting
The drive signal value for needing to input when degree display, Data (0) are the initial driving signal value when lighting OLED under setting brightness,
It can be obtained by measurement；When t is brightness decay total amount of the OLED in 0 to T time section and OLED display setting brightness
The ratio between brightness decay speed, i.e., the brightness regardless of OLED within the 0-T period shows state, when t is from 0 to T moment
Between in section OLED brightness decay total amount it is constant in the case where, be converted into the state that OLED always show setting brightness
The service life backoff algorithm of brightness decay time, organic electroluminescent device OLED provided in an embodiment of the present invention can be by right
The driving signal of OLED carries out real-time compensation, extends the OLED service life, and compensation precision is higher, in addition, having in the prior art very much
Extend the service life of OLED by the method for the preparation process of change OLED, higher cost, and above-mentioned organic electroluminescence device
The service life backoff algorithm of OLED, which only needs to change, compensates OLED to the drive signal value of OLED, and cost is relatively low, lifts below
Example illustrates the service life backoff algorithm of above-mentioned organic electroluminescent device OLED.
For example, lighting OLED, the T moment shows setting brightness, wherein display side of the OLED within the period at 0-T moment
There are two types of formulas, wherein indicating the display time after OLED is lighted, mode one: for the OLED within the period of 0 < t '≤T with t '
Brightness does not change, i.e. OLED always show setting brightness；Mode two: the brightness of OLED becomes within the period of 0 < t '≤T
Change.
Wherein, OLED display brightness situation be mode one in the case where, it is assumed that OLED is lighted with brightness L, 0 < t '≤
The brightness of OLED is stable always in brightness L in the period of T, then in formula Data (t)=a × exp (b × t) × Data (0)
T=T, then drive signal value Data (T)=a × exp (b × T) × Data (0) of the OLED at T moment and display brightness L,
In, a, b herein is the value of constant coefficient of the OLED at brightness L, and Data (0) herein is in brightness L1Under light OLED's
Initial driving signal value to the T moment again and is stablized in brightness L that is, after OLED is lighted, gives OLED input drive signal value
Data (T)=a × exp (b × T) × Data (0).
OLED is in the case where display brightness situation is mode two, it is assumed that OLED is with brightness L1It lights, and in 0 < t '≤T
One-shot change occurs for the brightness of OLED in period, i.e., in 0 < t '≤T1Display brightness L in time section1, in T1< t '≤T
It is stable always in brightness L in period2, then at this time in formula Data (t)=a × exp (b × t) × Data (0)Then in T moment and display brightness L2When drive signal value Wherein, a herein1、b1For OLED
In brightness L1Under constant coefficient value, a2、b2It is OLED in brightness L2Under constant coefficient value, Data (0) herein be
Brightness L2Under light the initial driving signal value of OLED, i.e., after OLED is lighted, at the T moment and stablize in brightness L2, give
OLED input drive signal value
It should be noted that above-mentioned OLED is in the case where display brightness situation is mode two, OLED is in 0 < t '≤T
Between in section the brightness of OLED repeatedly variation occurs, and show setting brightness at the T moment, it is first according to the algorithm in aforesaid way two
Conversion obtains the value of t in formula, and then can obtain the drive signal value at T moment and display setting brightness, specific to calculate
Process occurs that the algorithm of a brightness change is similar, and details are not described herein with the example above OLED in 0 < t '≤T time section.
The service life backoff algorithm of above-mentioned organic electroluminescent device OLED, the drive signal value inputted using adjusting to OLED
Method to OLED carry out real-time compensation, extend the service life of OLED, and compensation precision is higher, compensation way is simple and reliable, cost
It is lower.
Specifically, in the service life backoff algorithm of above-mentioned organic electroluminescent device OLED, acquisition formula Data (t)=a ×
Exp (b × t) × Data (0) mode specifically includes:
OLED is lighted in the case where setting brightness, with the passage of the display time of OLED, the driving signal by adjusting OLED is tieed up
The brightness for holding OLED is stable always in setting brightness, i.e. the brightness of maintenance OLED is constant always, and it is corresponding to measure different moments
Drive signal value, then the curve that the drive signal value in the case where setting brightness changes over time can be obtained, with reference to shown in Fig. 2.
Wherein, multiple and different brightness values is taken to setting brightness, the driving signal under multiple and different brightness values can be obtained
The curve that value changes over time is analyzed according to multiple curves of acquisition, obtains functional equation Data (t)=a of curve
× exp (b × t) × Data (0), i.e. formula Data (t)=a × exp (b × t) × Data (0), the constant under different brightness values
Coefficient a, b can be calculated by detection and be obtained.
Specifically, for formula Data (t)=a × exp (b × t) × Data (0), OLED is obtained in the case where setting brightness
The method of constant coefficient a, b specifically include:
OLED is lighted, the drive signal value inputted to OLED is adjusted, makes the brightness all-the-time stable of OLED in setting brightness；With
OLED the display time passage, different moments detect and record acquisition OLED driving signal measured value；And using public
Formula: Data (t)=a × exp (b × t) × Data (0) calculates the calculated value of the driving signal of OLED at the time of obtaining corresponding；
Then constant coefficient of the OLED in the case where setting brightness is obtained according to multiple groups measured value and corresponding calculated value application least square method
a、b。
Specifically, obtain constant coefficient a, b under each brightness value of OLED mode can there are many selections, such as:
Mode one
The constant under each brightness value of OLED is obtained using the method that above-mentioned acquisition sets constant coefficient a, b under brightness
Coefficient a, b, brightness value are natural number.That is, making setting brightness that different brightness values be taken to light OLED, then repeats above-mentioned acquisition and exist
The method for setting constant coefficient a, b under brightness obtains the value of constant coefficient a, the b of OLED under each brightness value.It obtains
Each brightness value under constant coefficient a, b value accuracy it is higher.
Mode two
Using under the brightness value for obtaining multiple intervals that the method for setting constant coefficient a, b under brightness obtains OLED selection
Constant coefficient a, b；Then OLED is obtained according to constant coefficient a, b application interpolation method under the brightness value at multiple intervals of acquisition
Constant coefficient a, b under the brightness value that do not choose, to obtain constant coefficient a, b under each brightness value of OLED, brightness value is
Natural number.The value of constant coefficient a, b under each brightness of OLED are obtained using the method in which two, that is, pass through acquisition OLED
Part luma value under constant coefficient a, b, then using calculation obtain each brightness value of OLED under constant coefficient
A, b does not need to detect the carry out driving signal under each brightness value, simplifies the constant obtained under each brightness value
The process of coefficient a, b improve total computational efficiency.
Specifically, the initial driving signal value for setting OLED under brightness can be obtained by measurement, wherein give setting brightness
It takes different brightness values to detect OLED, initial driving signal of the OLED under each brightness value can be obtained.
Specifically, the driving signal in the service life backoff algorithm of above-mentioned organic electroluminescent device OLED be driving voltage or
Driving current.
The embodiment of the invention also provides a kind of device of service life backoff algorithm for organic electroluminescent device OLED,
It include: for detecting the brightness of OLED and storing the brightness calculation module of brightness value；It is connect with brightness calculation module and based on
It calculates after OLED is lighted in T moment and the driving signal computing module of the stable driving signal when setting brightness；With driving signal
Computing module connection and the output module for being used to input drive signal value corresponding with setting brightness to OLED.Brightness calculation module
Brightness real-time detection to OLED simultaneously stores luminance information, and signal driving computing module receives the brightness of brightness calculation module
Information, and combine luminance information according to formula Data (t)=a × exp (b × t) × Data (0) obtain the T moment and display set
The drive signal value for determining brightness, inputting corresponding drive signal value to OLED by output module makes OLED stablize display at the T moment
Set brightness.The device of the above-mentioned service life backoff algorithm for organic electroluminescent device OLED is inputted using adjusting to OLED
The method of drive signal value carries out real-time compensation to OLED, extends the service life of OLED, and compensation precision is higher, compensation way is simple
Reliably, cost is relatively low.
Wherein, the driving signal in above-mentioned apparatus is specially driving voltage or driving current.And driving voltage, that is, anode electricity
Pressure.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies
Within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of service life backoff algorithm of organic electroluminescent device OLED characterized by comprising
Light OLED；
When the brightness of the OLED at the T moment and is stablized when setting brightness, described in the drive signal value driving according to setting
OLED；Wherein, the drive signal value Data (t) meets following equation:
Data (t)=a × exp (b × t) × Data (0)
Wherein, a, b are the constant coefficient when the brightness of OLED is the setting brightness；Data (0) is in the setting brightness
Under initial driving signal value when lighting the OLED；T is brightness decay total amount of the OLED in 0 to T time section
The ratio between the brightness decay speed when setting brightness is shown with the OLED.
2. the service life backoff algorithm of organic electroluminescent device OLED according to claim 1, which is characterized in that obtain institute
Stating the method for setting constant coefficient a, b under brightness includes:
The OLED is lighted, and maintains the brightness all-the-time stable of the OLED in the setting brightness；
The measured value of the driving signal of the OLED is detected and obtained in different moments；And use formula: Data (t)=a × exp
(b × t) × Data (0) calculates the calculated value of the driving signal of OLED at the time of obtaining corresponding；
The measured value according to multiple groups and corresponding calculated value application least square method obtain the constant system under the setting brightness
Number a, b.
3. the service life backoff algorithm of organic electroluminescent device OLED according to claim 2, which is characterized in that use institute
The method for stating constant coefficient a, b under acquisition setting brightness obtains constant coefficient a, b under each brightness value of the OLED, institute
Stating brightness value is natural number.
4. the service life backoff algorithm of organic electroluminescent device OLED according to claim 2, which is characterized in that use institute
State the constant under the brightness value at multiple intervals that the method for obtaining constant coefficient a, b under setting brightness obtains the OLED selection
Coefficient a, b；
The OLED is obtained according to constant coefficient a, b application interpolation method under the brightness value at the multiple interval of acquisition not choose
Brightness value under constant coefficient a, b, to obtain constant coefficient a, b under each brightness value of the OLED, the brightness value
For natural number.
5. the service life backoff algorithm of organic electroluminescent device OLED according to claim 1-4, feature exist
In the driving signal includes driving voltage or driving current.
6. a kind of device of the service life backoff algorithm for organic electroluminescent device OLED characterized by comprising
For detecting the brightness of OLED and storing the brightness calculation module of brightness value；
It is connect with the brightness calculation module and is used to calculate after the OLED is lighted at the T moment and stablizes when setting brightness
Driving signal driving signal computing module；
And the driving signal computing module connects and believes for inputting driving corresponding with the setting brightness to the OLED
Number value output module.
7. device according to claim 6, which is characterized in that the driving signal includes driving voltage or driving current.
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| 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 |
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| CN102222455A (en) * | 2011-06-14 | 2011-10-19 | 云南北方奥雷德光电科技股份有限公司 | Method for assessing service life of AMOLED (active matrix/organic light emitting diode) microdisplay |
| CN106847176A (en) * | 2017-03-02 | 2017-06-13 | 西安交通大学 | A kind of OLED life-spans improve algorithm and device |
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| 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 |
| CN110706637B (en) * | 2019-10-28 | 2022-10-25 | 昆山国显光电有限公司 | Display panel brightness compensation method, compensation device and display device |
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