CN106297658B - A kind of current compensation device, method and organic LED display panel - Google Patents
A kind of current compensation device, method and organic LED display panel Download PDFInfo
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- CN106297658B CN106297658B CN201610966985.2A CN201610966985A CN106297658B CN 106297658 B CN106297658 B CN 106297658B CN 201610966985 A CN201610966985 A CN 201610966985A CN 106297658 B CN106297658 B CN 106297658B
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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]
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Abstract
The invention discloses a kind of current compensation device, method and organic light emitting diode display panels, including：Control circuit and Organic Light Emitting Diode OLED pixel circuit.The control circuit determines the light emission luminance of the OLED device in the OLED pixel circuit, and the current value after the compensation for flowing through the OLED device is determined according to the light emission luminance of the OLED device；The OLED pixel circuit, the current value after the compensation determined according to the control circuit drive the OLED device to shine.By the light emission luminance for detecting the OLED device in OLED pixel circuit, current compensation is carried out to OLED device, the problem of being reduced because of the brightness that aging is brought to avoid OLED device, so that the display brightness of the OLED device after compensation is promoted, effectively promote the display quality of OLED display panel.
Description
Technical field
The present invention relates to a kind of technical field of semiconductors more particularly to current compensation device, method and organic light emission two levels
Pipe display panel.
Background technology
With the continuous development of display panel technology, Organic Light Emitting Diode (Organic Lighting Emitting
Diode, OLED) display panel is as a kind of self luminous display device, with traditional liquid crystal display panel of thin film transistor
(Thin Film Transistor Liquid Crystal Display, TFT-LCD) is compared, and does not need backlight not only, also
Have many advantages, such as that light-weight, shock resistance is good, the response time is fast, visual angle is wide, low energy consumption, low-temperature characteristics is good, is widely used in
In every field.
In general, when OLED display panel is when receiving the picture signal of external equipment input, by analog-to-digital conversion equipment
Picture signal corresponding digital signals are converted into analog signal, and analog signal is input in OLED pixel circuit, with driving
The corresponding OLED device of thin film transistor (TFT) in OLED pixel circuit shines.
But with the increase of use time due to OLED device, the dimmed situation of light emission luminance, this feelings are susceptible to
Shape is referred to as in the industry OLED agings.I.e. for the same picture signal of external equipment input, occur the OLED device of aging with
The OLED device that aging not yet occurs is compared, and display brightness of the OLED device of aging when showing the picture signal occurs will be low
In display brightness of the OLED device when showing the picture signal that aging not yet occurs.
In conclusion there is an urgent need for a kind of current compensation device, for solving OLED devices in OLED display panel in the prior art
The problem of display brightness caused by part aging reduces.
Invention content
In view of this, an embodiment of the present invention provides a kind of current compensation device, method and organic light-emitting diode displays
Panel, for solving the problems, such as that display brightness caused by OLED device aging reduces in OLED display panel in the prior art.
An embodiment of the present invention provides a kind of current compensation devices, including：Control circuit and Organic Light Emitting Diode OLED
Pixel circuit, wherein：
The control circuit, the light emission luminance for determining the OLED device in the OLED pixel circuit, and according to institute
The light emission luminance for stating OLED device determines the current value after the compensation for flowing through the OLED device；
The OLED pixel circuit, the current value after the compensation for being determined according to the control circuit, drives institute
OLED device is stated to shine.
The embodiment of the present invention additionally provides a kind of current compensation method, including：
Determine the light emission luminance of the OLED device in Organic Light Emitting Diode OLED pixel circuit；
The current value after the compensation for flowing through the OLED device is determined according to the light emission luminance of the OLED device；
According to the current value after the compensation for flowing through the OLED device, the OLED device is driven to shine.
The embodiment of the present invention additionally provides a kind of organic LED display panel, including：Control circuit and organic hair
Optical diode OLED pixel circuit.
The present invention has the beneficial effect that：
Current compensation device in the embodiment of the present invention includes control circuit and OLED pixel circuit, and control circuit is for true
Determine the light emission luminance of the OLED device in OLED pixel circuit, and is flowed through according to the determination of the light emission luminance of the OLED device described
Current value after the compensation of OLED device；After OLED pixel circuit is for the compensation according to the determining OLED device
Current value drives the OLED device to shine.In this way, the light emission luminance by detecting the OLED device in OLED pixel circuit,
The problem of current compensation is carried out to OLED device, is reduced because of the brightness that aging is brought to avoid OLED device, after making compensation
The display brightness of OLED device is promoted, and the display quality of OLED display panel is effectively promoted.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of structural schematic diagram of current compensation device provided in an embodiment of the present invention；
Fig. 2 is a kind of flow diagram of current compensation method provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of organic LED display panel provided in an embodiment of the present invention.
Specific implementation mode
In order to achieve the object of the present invention, an embodiment of the present invention provides a kind of current compensation device, method and organic hairs
Light diode display panel, current compensation device include control circuit and OLED pixel circuit, and control circuit is for determining OLED
The light emission luminance of OLED device in pixel circuit, and the OLED devices are flowed through according to the determination of the light emission luminance of the OLED device
Current value after the compensation of part；OLED pixel circuit is used for according to the electric current after the compensation of the determining OLED device
Value drives the OLED device to shine.In this way, the light emission luminance by detecting the OLED device in OLED pixel circuit, right
OLED device carries out current compensation, the problem of reduction because of the brightness that aging is brought to avoid OLED device, makes the OLED after compensation
The display brightness of device is promoted, and the display quality of OLED display panel is effectively promoted.
The each embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.Obviously, described
Embodiment is only a part of embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field
All other embodiment that those of ordinary skill is obtained without making creative work, belongs to protection of the present invention
Range.
Fig. 1 is a kind of structural schematic diagram of current compensation device provided in an embodiment of the present invention.The current compensation device
Including：Control circuit 11 and OLED pixel circuit 12, wherein：
The control circuit 11, the light emission luminance for determining the OLED device in the OLED pixel circuit, and according to
The light emission luminance of the OLED device determines the current value after the compensation for flowing through the OLED device；
The OLED pixel circuit 12, the current value after the compensation for being determined according to the control circuit, driving
The OLED device shines.
The control circuit 11 is specifically used for the anode voltage of detection OLED device, and according to the anode of OLED device electricity
Preset relation between pressure and light emission luminance, the corresponding OLED light emission luminance of the anode voltage confirmly detected.
The structure of the recorded OLED pixel circuit 12 includes in the embodiment of the present invention：First film transistor
T1, the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3, the 4th thin film transistor (TFT) T4, the 5th thin film transistor (TFT) T5, the first control
Signal input part em processed, second control signal input terminal Scan, third control signal input Tsen, the 4th control signal input
OLEDsen, OLED device, capacitance C, the first power supply, second source are held, wherein：
The grid of the first film transistor is connect with the drain electrode of the third thin film transistor (TFT), and with it is the described 4th thin
The source electrode of film transistor connects, and is also connect with the cathode of the capacitance；The source electrode of the first film transistor and described first
Power supply connects, and is connect with the anode of the capacitance；The drain electrode of the first film transistor and second thin film transistor (TFT)
Source electrode connection, and connect with the source electrode of the 5th thin film transistor (TFT)；
The grid of second thin film transistor (TFT) is connect with the first control signal input terminal, drain electrode and the OLED devices
The anode of part connects；
The grid of the third thin film transistor (TFT) is connect with the second control signal input terminal, source electrode and digital analog converter
Connection；
The grid of 4th thin film transistor (TFT) is connect with the third control signal input, drain electrode and analog-digital converter
Connection, and connect with the drain electrode of the 5th thin film transistor (TFT)；
The grid of 5th thin film transistor (TFT) is connect with the 4th control signal input；
The cathode of the OLED device is connect with the second source.
It should be noted that the structure of OLED pixel circuit 12 can be structure recorded in the embodiment of the present invention,
It can be other OLED pixel circuit structures, be not specifically limited here.
Due to the restricted lifetime of the anode material of OLED device, the anode voltage of OLED device can as time increases and
Decline, and then the light emission luminance of OLED device is caused to decline, therefore experiment or reality can be passed through in embodiments of the present invention
The modes such as detection determine the preset relation between the anode voltage of OLED device and light emission luminance, and then by detecting OLED device
Actual anode voltage obtain the practical light emission luminance of OLED device.
Specifically, the structure based on OLED pixel circuit 12 recorded in the embodiment of the present invention, the control circuit 11
When the conducting of the second thin film transistor (TFT), the conducting of the 5th thin film transistor (TFT), first film transistor driving OLED device shine, detection
The anode voltage of OLED device, i.e. detection obtain the actual anode voltage of OLED device.
It should be noted that the second thin film transistor (TFT) conducting with turn off the electricity by being input to first control signal input terminal
Flat control.For example, when the level for being input to first control signal input terminal is high level, the shutdown of the second thin film transistor (TFT), when
When the level for being input to first control signal input terminal is low level, the conducting of the second thin film transistor (TFT).
Similarly, the conducting with shutdown of third thin film transistor (TFT) are by the level control of input value second control signal input terminal
The conducting of system, the 4th thin film transistor (TFT) is controlled with shutdown by the level for being input to third control signal input, and the 5th film is brilliant
The conducting of body pipe is controlled with shutdown by the level for being input to the 4th control signal input, and specific control method is believed with the first control
The conducting that the incoming level of number input terminal controls the second thin film transistor (TFT) is identical as the method turned off, and which is not described herein again.
It should be noted that in addition to controlling the second thin film transistor (TFT), third thin film transistor (TFT), the 4th thin using the above method
The conducting and shutdown of film transistor and the 5th thin film transistor (TFT) can also use other control methods, not do specific limit here
It is fixed.
In another embodiment of the present invention, the control circuit 11 can also include memory, and the memory is used
The default pass between the anode voltage of OLED device and light emission luminance is determined by experiment or the modes such as actually detected in storage
System, this preset relation can be stored in the brightness decay table of comparisons of OLED device, can also be stored in other media, this
In be not specifically limited.
Control circuit 11 is after the anode voltage of detection OLED device, according to the anode of the OLED device stored in memory
Preset relation between voltage and light emission luminance compares actual anode voltage and the brightness decay pair of OLED device of OLED device
According to the anode voltage of the OLED device described in table, the practical light emission luminance of OLED device is determined.
Preferably, in embodiments of the present invention, the control circuit 11 further includes analog-digital converter, the analog-digital converter
The anode voltage of the OLED device detected is converted into the first digital code, the brightness of storage OLED device is removed in the memory
Decay other than the table of comparisons, first digital code can also be stored.
The light emission luminance for the OLED device that the control circuit 11 is obtained according to detection is calculated by the following formula really
Current value of the constant current after the compensation of the OLED device：
Iem=100/P*n/m*IWith reference to；
Wherein, IemFor the current value after the compensation for flowing through the OLED device is calculated, P is the hair of the OLED device
Brightness, n are the grayscale value of image to be displayed, and m is total to show that equipment is supported comprising the OLED of the current compensation device
Grayscale value, IWith reference toThe current value provided by the reference power source for including in the control circuit.
The following detailed description of the structure of OLED pixel circuit 12 based on the embodiment of the present invention, how is control circuit 11
The light emission luminance of the OLED device obtained according to detection determines the current value after the compensation for flowing through the OLED device.
First, control circuit 11 determines the first grid electricity of first film transistor when first film transistor cut-off
Pressure, and determine the second grid voltage of first film transistor when first film transistor conducting；
Secondly, control circuit 11 is according to the primary grid voltage, the hair of the second grid voltage, the OLED device
The threshold voltage of brightness and the first film transistor determines the current value after the compensation for flowing through the OLED device.
Optionally, the control circuit 11 further includes：First contactor, ground wire (GND), wherein：
First contactor, for controlling the break-make between the OLED pixel circuit and ground wire；
The ground wire, for being grounded the OLED pixel circuit when first contactor is closed.
Specifically, control circuit 11 is in the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the 4th film crystal
Pipe conducting, the 5th thin film transistor (TFT) conducting, and the first contactor by be closed be transformed to disconnect when, detect first film transistor
The primary grid voltage of first film transistor when cut-off.
It should be noted that when being closed the first contactor, the voltage of capacitance cathode becomes low level, and the first film is brilliant
The grid voltage of body pipe becomes low level, and first film transistor is in the conduction state, when the first contactor is converted by being closed
When to disconnect, the first power supply charges to capacitance when first film transistor is connected, until first film transistor is ended,
At this point, the primary grid voltage of first film transistor meets following first expression formula：
Vg1=Vdd-|Vth|,
Wherein, Vg1 is primary grid voltage, and Vdd is the first supply voltage, and Vth is the threshold value electricity of first film transistor
Pressure.
Optionally, the control circuit 11 further includes：Second circuit switch, reference current source, wherein：
The second circuit switch, for controlling the break-make between the OLED pixel circuit and the reference current source；
The reference current source, for providing OLED when the second circuit is switched and is closed for the OLED pixel circuit
Device does not occur to flow through the current value of OLED device when aging.
Specifically, control circuit 11 is in the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the 4th film crystal
Pipe conducting, the conducting of the 5th thin film transistor (TFT), and when second circuit switch closure, first is thin when detecting first film transistor conducting
Second grid voltage is converted into third digital code, is transmitted to memory by the second grid voltage of film transistor.
When being closed second circuit switch, the electric current of reference current source can flow through OLED pixel circuit, keep the first film brilliant
Body pipe is connected, at this point, the second grid voltage of first film transistor meets following second expression formula：
Wherein, Vg2 is second grid voltage, and K is the dielectric constant of first film transistor grid material, Vth first
The threshold voltage of thin film transistor (TFT).
It should be noted that when determining primary grid voltage and second grid voltage, first grid electricity can be first determined
Pressure, then determine second grid voltage, it can also first determine second grid voltage, then determine primary grid voltage, not do have here
Body limits.
Preferably, the primary grid voltage that the analog-digital converter is additionally operable to detect is converted into the second digital code, with
And the second grid voltage detected is converted into third digital code, the memory is additionally operable to storage and indicates primary grid voltage
The second digital code and storage indicate second grid voltage third digital code.
Specifically, when there is detection signal input current to compensate equipment, the control circuit 11 is according to the first grid
Corresponding second digital code of voltage, the corresponding third digital code of the second grid voltage, the OLED device light emission luminance,
It detects the grayscale value of signal and the OLED comprising the current compensation device shows total grayscale value that equipment is supported, to detection
Signal is modulated.
Modulated detection signal is converted to analog signal by the control circuit 11, and drive is contained in the analog signal
The data voltage of the first film transistor of dynamic OLED pixel circuit 12, the data voltage meet following third expression formula：
Wherein, Vdata is data voltage.
When third thin film transistor (TFT) is connected, the data voltage is transmitted to OLED pixel circuit 12 by control circuit 11
The grid of first film transistor, at this point, the electric current after flowing through the compensation of OLED device meets：
Iem=K (Vdd-Vdata-Vth)2,
Wherein, IemFor the current value after the compensation for flowing through the OLED device is calculated.
According to the first expression formula, the second expression formula and third expression formula, after the compensation for obtaining flowing through the OLED device
The calculation formula of current value is：
Iem=100/P*n/m*IWith reference to。
It should be noted that control circuit 11 determines the calculation formula of the current value after the compensation for flowing through the OLED device
It can realize through the above way, can also realize, be not specifically limited here by other means.
In embodiments of the present invention, the control circuit 11 further includes data image signal input terminal, data processor, number
Mode converter, wherein：
The data image signal input terminal, the digital signal for receiving external equipment transmission, and the number is believed
Number it is transmitted to the data processor.
The data processor, for being modulated to the digital signal；
The digital analog converter, for modulated digital signal to be converted into analog signal.
Specifically, when the data image signal input terminal in control circuit 11 receives the digital signal of external equipment transmission
When, data processor is modulated the digital signal, and modulated digital signal is converted into simulating by digital analog converter
Signal contains the data voltage of the first film transistor of driving OLED pixel circuit 12 in the analog signal.
The OLED pixel circuit 12, the current value after the compensation for being determined according to the control circuit, driving
The OLED device shines.
Specifically, when third thin film transistor (TFT) is connected, the data voltage in analog signal is transferred to OLED pixel electricity
The grid of first film transistor in road 12, realizes the conducting of first film transistor, at this point, flowing through the current value of OLED device
Current value after the compensation that as control circuit determines, OLED pixel circuit drive OLED devices according to the current value after the compensation
Part shines.
Recorded current compensation device in through the embodiment of the present invention, current compensation device include control circuit and OLED
Pixel circuit, control circuit are used to determine the light emission luminance of the OLED device in OLED pixel circuit, and according to the OLED devices
The light emission luminance of part determines the current value after the compensation for flowing through the OLED device；OLED pixel circuit is used for according to determining institute
The current value after the compensation of OLED device is stated, the OLED device is driven to shine.In this way, by detecting OLED pixel circuit
In OLED device light emission luminance, to OLED device carry out current compensation, the brightness brought by aging to avoid OLED device
The problem of reduction, enables the display brightness of the OLED device after compensation to be promoted, and effectively promotes the display matter of OLED display panel
Amount.
Fig. 2 is a kind of flow diagram of current compensation method provided in an embodiment of the present invention.The method can be as follows
It is shown.
Step 201：Determine the light emission luminance of the OLED device in Organic Light Emitting Diode OLED pixel circuit.
In step 201, control circuit detects the anode voltage of OLED device first, then in the sun of detection OLED device
After pole tension, the brightness decay table of comparisons of obtained OLED device anode voltage and the OLED device stored in memory will be measured
It is compared, determines the light emission luminance of OLED.
Wherein, described in the brightness decay table of comparisons of the OLED device stored in memory is the anode electricity of OLED device
Preset relation between pressure and light emission luminance.
Step 202：The current value after the compensation for flowing through the OLED device is determined according to the light emission luminance of OLED device.
In step 202, first, the first grid electricity of first film transistor when determining first film transistor cut-off
Pressure, and determine the second grid voltage of first film transistor when first film transistor is connected；Then, when there is detection signal
When input, according to primary grid voltage, the threshold of second grid voltage, the light emission luminance of OLED device and first film transistor
Threshold voltage determines the current value after the compensation for flowing through the OLED device.
Specifically, it is determined that first film transistor end when first film transistor primary grid voltage detailed process
For：
When the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the conducting of the 4th thin film transistor (TFT), the 5th film are brilliant
Body pipe is connected, and when the first contactor is transformed to disconnect by being closed, when detecting first film transistor cut-off described in the
The primary grid voltage of one thin film transistor (TFT).
Wherein, the primary grid voltage for the expression formula and first film transistor in embodiment 1 that primary grid voltage meets
Expression formula it is identical, which is not described herein again.
The detailed process of the second grid voltage of first film transistor is when determining first film transistor conducting：
When the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the conducting of the 4th thin film transistor (TFT), the 5th film are brilliant
Body pipe is connected, and when second circuit switch closure, detects the first film transistor when first film transistor conducting
The second grid voltage.
Wherein, the second grid voltage for the expression formula and first film transistor in embodiment 1 that second grid voltage meets
Expression formula it is identical, which is not described herein again.
When there is detection signal input current to compensate equipment, the control circuit is according to primary grid voltage, second grid
Voltage, the light emission luminance of OLED device, the grayscale value of detection signal and the OLED comprising the current compensation device show and set
The standby total grayscale value supported is modulated detection signal.
Then modulated detection signal is converted into analog signal, and will in the case where third thin film transistor (TFT) is connected
The analog signal transmission makes first film transistor be connected to OLED pixel circuit, at this point, flowing through the electric current of OLED device i.e.
For the electric current after compensation.
Wherein, the expression formula for flowing through the electric current of OLED is identical as the calculation formula in embodiment 1, and which is not described herein again.
Step 203：According to the current value after the compensation for flowing through the OLED device, the OLED device is driven to send out
Light.
In step 203, control circuit receive external equipment transmission digital signal when, to the digital signal into
Row modulation, modulated digital signal are converted into analog signal by digital analog converter.When third thin film transistor (TFT) is connected, control
The grid of first film transistor in analog signal transmission to OLED pixel circuit is realized first film transistor by circuit processed
Conducting, at this point, the current value for flowing through OLED device is the current value that control circuit determines, OLED pixel circuit is according to the electricity
Flow valuve drives OLED device to shine.
An embodiment of the present invention provides a kind of current compensation methods, it is first determined OLED device in OLED pixel circuit
Then light emission luminance determines the current value after the compensation for flowing through the OLED device according to the light emission luminance of the OLED device,
The last current value according to after the compensation for flowing through the OLED device drives the OLED device to shine.In this way, passing through inspection
Survey OLED pixel circuit in OLED device light emission luminance, to OLED device carry out current compensation, to avoid OLED device because
The problem of brightness that aging is brought reduces, enables the display brightness of the OLED device after compensation to be promoted, and it is aobvious effectively to promote OLED
Show the display quality of panel.
Fig. 3 is the structural schematic diagram of Organic Light Emitting Diode OLED display panel provided in an embodiment of the present invention.It is described
OLED display panel 30 includes current compensation device 31, and the current compensation device 31 is by control circuit 311 and OLED pixel electricity
Road 312 forms, wherein：
The control circuit 311, the light emission luminance for determining the OLED device in OLED pixel circuit, and according to described
The light emission luminance of OLED device determines the current value after the compensation for flowing through the OLED device；
The OLED pixel circuit 312, for according to the current value after the compensation of the determining OLED device, driving
The OLED device is moved to shine.
Organic Light Emitting Diode OLED display panel provided in an embodiment of the present invention, by detecting in OLED pixel circuit
The light emission luminance of OLED device carries out current compensation to OLED device, to avoid OLED device because the brightness that aging is brought reduces
The problem of, so that the display brightness of the OLED device after compensation is promoted, effectively promotes the display quality of OLED display panel.
It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus (equipment) or computer
Program product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware
Embodiment form.Moreover, the present invention can be used in one or more wherein include computer usable program code meter
The computer journey implemented in calculation machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of sequence product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product
And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions
And/or the combination of the flow and/or box in box and flowchart and/or the block diagram.These computer programs can be provided to refer to
Enable the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate
One machine so that by the instruction that computer or the processor of other programmable data processing devices execute generate for realizing
The device for the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from model of the invention by those skilled in the art
It encloses.In this way, if these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology, then
The present invention is also intended to include these modifications and variations.
Claims (8)
1. a kind of current compensation device, which is characterized in that including：Control circuit and Organic Light Emitting Diode OLED pixel circuit,
Wherein：
The control circuit, the light emission luminance for determining the OLED device in the OLED pixel circuit, and according to described
The light emission luminance of OLED device determines the current value after the compensation for flowing through the OLED device；
The OLED pixel circuit, the current value after the compensation for being determined according to the control circuit, described in driving
OLED device shines；
The control circuit determines the electric current after the compensation for flowing through the OLED device according to the light emission luminance of the OLED device
Value, including：
The control circuit, specifically for the electric current for being calculated by the following formula to obtain after the compensation for flowing through the OLED device
Value：
Iem=100/P*n/m*IWith reference to；
Wherein, IemFor the current value after the compensation for flowing through the OLED device is calculated, P is the luminance of the OLED device
Degree, n are the grayscale value of image to be displayed, and m is comprising total grayscale for being supported of the OLED of current compensation device display equipment
Value, IWith reference toThe current value provided by the reference power source for including in the control circuit.
2. current compensation device as described in claim 1, which is characterized in that the control circuit determines the OLED pixel electricity
The light emission luminance of the OLED device in road, including：
The control circuit is specifically used for detecting the anode voltage of the OLED device, and according to the anode voltage of OLED device
Preset relation between light emission luminance, the light emission luminance of the corresponding OLED of the anode voltage confirmly detected.
3. current compensation device as claimed in claim 1 or 2, which is characterized in that the OLED pixel circuit includes:First is thin
Film transistor, the second thin film transistor (TFT), third thin film transistor (TFT), the 4th thin film transistor (TFT), the 5th thin film transistor (TFT), the first control
Signal input part, second control signal input terminal, third control signal input, the 4th control signal input, OLED device,
Capacitance, the first power supply, second source, wherein：
The grid of the first film transistor is connect with the drain electrode of the third thin film transistor (TFT), and brilliant with the 4th film
The source electrode of body pipe connects, and is also connect with the cathode of the capacitance；The source electrode of the first film transistor and first power supply
Connection, and connect with the anode of the capacitance；The source of the drain electrode and second thin film transistor (TFT) of the first film transistor
Pole connects, and is connect with the source electrode of the 5th thin film transistor (TFT)；
The grid of second thin film transistor (TFT) is connect with the first control signal input terminal, drain electrode and the OLED device
Anode connects；
The grid of the third thin film transistor (TFT) is connect with the second control signal input terminal, and source electrode connects with digital analog converter
It connects；
The grid of 4th thin film transistor (TFT) is connect with the third control signal input, and drain electrode connects with analog-digital converter
It connects, and is connect with the drain electrode of the 5th thin film transistor (TFT)；
The grid of 5th thin film transistor (TFT) is connect with the 4th control signal input；
The cathode of the OLED device is connect with the second source.
4. current compensation device as claimed in claim 3, which is characterized in that the control circuit is according to the OLED device
Light emission luminance determines the current value after the compensation for flowing through the OLED device, including：
The control circuit is specifically used for determining the first grid of first film transistor when first film transistor cut-off
Voltage, and determine the second grid voltage of the first film transistor when first film transistor conducting；According to institute
State primary grid voltage, the second grid voltage, the light emission luminance of the OLED device and the first film transistor
Threshold voltage, determine the current value after flowing through the compensation of the OLED device.
5. current compensation device as claimed in claim 4, which is characterized in that the control circuit determines first film transistor
The primary grid voltage of first film transistor when cut-off, including：
The control circuit is specifically used for when the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the 4th film crystal
Pipe conducting, the conducting of the 5th thin film transistor (TFT), and when the first contactor is transformed to disconnect by being closed, it is brilliant to detect the first film
The primary grid voltage of body pipe first film transistor when ending.
6. current compensation device as claimed in claim 4, which is characterized in that the control circuit determines that the first film is brilliant
The second grid voltage of body pipe first film transistor when being connected, including：
The control circuit is specifically used for when the shutdown of the second thin film transistor (TFT), the shutdown of third thin film transistor (TFT), the 4th film crystal
Pipe conducting, the conducting of the 5th thin film transistor (TFT), and when second circuit switch closure, detect first film transistor conducting when institute
State the second grid voltage of first film transistor.
7. a kind of method for realizing current compensation using any one of the claim 1-6 current compensation devices, which is characterized in that
The current compensation method includes：
Determine the light emission luminance of the OLED device in Organic Light Emitting Diode OLED pixel circuit；
The current value after the compensation for flowing through the OLED device is determined according to the light emission luminance of the OLED device；
According to the current value after the compensation for flowing through the OLED device, the OLED device is driven to shine.
8. a kind of Organic Light Emitting Diode OLED display panel, which is characterized in that wanted comprising right in the OLED display panel
Seek 1-6 any one of them current compensation devices.
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| CN107767815B (en) * | 2017-11-30 | 2020-09-29 | 武汉华星光电半导体显示技术有限公司 | Compensation system and method of OLED display panel |
| CN109215580B (en) * | 2018-09-18 | 2020-05-05 | 昆山国显光电有限公司 | Pixel circuit structure and driving method thereof |
| CN110969987A (en) * | 2019-12-20 | 2020-04-07 | 京东方科技集团股份有限公司 | Display driving circuit, display panel, display device and driving method |
| CN110910805A (en) * | 2019-12-31 | 2020-03-24 | 深圳创维－Rgb电子有限公司 | Compensation adjusting device and compensation adjusting method of display screen |
| CN114944134B (en) * | 2022-05-12 | 2023-06-30 | 惠科股份有限公司 | Pixel driving circuit, method and display panel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281720A (en) * | 2008-04-15 | 2008-10-08 | 上海广电光电子有限公司 | Drive circuit for active matrix organic luminous display device |
| CN101515434A (en) * | 2008-02-22 | 2009-08-26 | 乐金显示有限公司 | Organic light emitting diode display and method of driving the same |
| CN101582240A (en) * | 2008-05-16 | 2009-11-18 | 佳能株式会社 | Light-emitting apparatus |
| CN102074189A (en) * | 2009-11-24 | 2011-05-25 | 乐金显示有限公司 | Organic light emitting diode display and method for driving the same |
| CN104157234A (en) * | 2014-01-17 | 2014-11-19 | 北京京东方光电科技有限公司 | Circuit and method for driving pixel unit, and display device |
| CN104464643A (en) * | 2014-12-29 | 2015-03-25 | 上海和辉光电有限公司 | Display device, pixel driving circuit and driving method of pixel driving circuit |
| CN105453164A (en) * | 2013-07-23 | 2016-03-30 | 娜我比可隆股份有限公司 | Brightness deviation compensation apparatus and compensation method of display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101201722B1 (en) * | 2010-02-23 | 2012-11-15 | 삼성디스플레이 주식회사 | Organic light emitting display and driving method thereof |
-
2016
- 2016-10-28 CN CN201610966985.2A patent/CN106297658B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101515434A (en) * | 2008-02-22 | 2009-08-26 | 乐金显示有限公司 | Organic light emitting diode display and method of driving the same |
| CN101281720A (en) * | 2008-04-15 | 2008-10-08 | 上海广电光电子有限公司 | Drive circuit for active matrix organic luminous display device |
| CN101582240A (en) * | 2008-05-16 | 2009-11-18 | 佳能株式会社 | Light-emitting apparatus |
| CN102074189A (en) * | 2009-11-24 | 2011-05-25 | 乐金显示有限公司 | Organic light emitting diode display and method for driving the same |
| CN105453164A (en) * | 2013-07-23 | 2016-03-30 | 娜我比可隆股份有限公司 | Brightness deviation compensation apparatus and compensation method of display device |
| CN104157234A (en) * | 2014-01-17 | 2014-11-19 | 北京京东方光电科技有限公司 | Circuit and method for driving pixel unit, and display device |
| CN104464643A (en) * | 2014-12-29 | 2015-03-25 | 上海和辉光电有限公司 | Display device, pixel driving circuit and driving method of pixel driving circuit |
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