CN108182910A - Driving circuit and method, the AMOLED display panels of a kind of AMOLED display panels - Google Patents
Driving circuit and method, the AMOLED display panels of a kind of AMOLED display panels Download PDFInfo
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- CN108182910A CN108182910A CN201711396972.7A CN201711396972A CN108182910A CN 108182910 A CN108182910 A CN 108182910A CN 201711396972 A CN201711396972 A CN 201711396972A CN 108182910 A CN108182910 A CN 108182910A
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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
- G09G3/3258—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 voltage across the light-emitting element
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
Abstract
The present invention provides a kind of driving circuit of AMOLED display panels, and driving circuit includes：Multiple pixel units, each pixel unit include three sub-pixels, and driving circuit further includes power management module and temperature sensor corresponding at least one sub-pixel；It is included there are one light emitting diode in each sub-pixel, and the cathode of the light emitting diode in each pixel unit is all connected to same node；Temperature sensor is used to acquire the temperature data at least one sub-pixel, and exporting temperature data into power management module；Power management module is additionally operable to according to temperature data, and combine preset temperature voltage correspondence for the cathode of out-put supply low-voltage to light emitting diode, exports the anode of the light emitting diode in corresponding power supply high voltage to corresponding sub-pixel.The present invention can solve the problems, such as the colour cast of light emitting diode in AMOLED display panels, can also avoid, to having colour cast after sub-pixel overcompensation or compensation, having very good compensation effect to sub-pixel.
Description
Technical field
Driving circuit and method the present invention relates to display technology field more particularly to a kind of AMOLED display panels,
AMOLED display panels.
Background technology
With TFT-LCD (thin film transistor-liquid crystal display, tft liquid crystal
Display) it compares, AMOLED (Active-matrix organic light emitting diode, the organic hair of active matrix
Near-infrafed photodiodes) there is frivolous, low-power consumption, high contrast, high colour gamut and can realize Flexible Displays, it has also become it is next
The development trend of display technology.
Include OLED device (i.e. light emitting diode) in the sub-pixel of AMOLED display panels due to the material of OLED device
Material mobility is affected by temperature, therefore under different temperatures, and the corresponding voltage of white balance decomposition RGB monochromatic brightness is also different, so as to
It can influence the display effect of AMOLED display panels.Due to the characteristic of OLED device itself organic material, in different temperatures environment
Lower mobility can change, and the operating voltage of RGB monochromatic (red, green, blue) is down or up, and RGB is monochromatic
Between variation ratio it is also different, wherein blue variation is maximum, thus under different temperatures environment OLED device colour cast
It differs, after this colour cast is restored to room temperature with mixed degree, mobility can also be restored to room temperature numerical value, the brightness of RGB monochromes
Original intensity is restored to, white light color offset phenomenon disappears therewith.
Invention content
In order to solve the above technical problems, the driving circuit and method of a kind of AMOLED display panels of present invention offer,
AMOLED display panels can solve the problems, such as the colour cast of light emitting diode in AMOLED display panels, can also avoid antithetical phrase picture
There is colour cast after plain overcompensation or compensation, there is very good compensation effect to sub-pixel.
A kind of driving circuit of AMOLED display panels provided by the invention, including：Multiple pixel units, each pixel list
Member includes three sub-pixels, and the driving circuit further includes power management module and temperature corresponding at least one sub-pixel
Sensor；
It is included there are one light emitting diode in each sub-pixel, and the cathode of the light emitting diode in each pixel unit
It is all connected to same node；
The temperature sensor is connect with the power management module, for acquiring at least one sub-pixel
Temperature data, and the temperature data is exported to the power management module；
The power management module for out-put supply low-voltage to the cathode of the light emitting diode, is additionally operable to basis
The temperature data, and preset temperature voltage correspondence is combined, corresponding power supply high voltage is obtained, and the power supply is high
The anode of light emitting diode in voltage output to corresponding sub-pixel.
Preferably, each pixel unit includes red sub-pixel；The red sub-pixel includes the first film crystal
Pipe, the second thin film transistor (TFT), the first capacitance and red light-emitting diode；
The drain and gate of the first film transistor is respectively connected to the first data line and scan line, the first film
The source electrode of transistor is connect with the grid of second thin film transistor (TFT)；
The source electrode of second thin film transistor (TFT) is connect with the anode of the red light-emitting diode, and second film is brilliant
For receiving the power supply high voltage of the power management module output, the cathode of the red light-emitting diode is used for the drain electrode of body pipe
In the power supply low-voltage for receiving the power management module output；
The both ends of first capacitance are connect respectively with the grid of second thin film transistor (TFT) and source electrode.
Preferably, each pixel unit also includes green sub-pixels；It is brilliant that the green sub-pixels include third film
Body pipe, the 4th thin film transistor (TFT), the second capacitance and green light LED；
The drain and gate of the third thin film transistor (TFT) is respectively connected to the second data line and scan line, the third film
The source electrode of transistor is connect with the grid of the 4th thin film transistor (TFT)；
The source electrode of 4th thin film transistor (TFT) is connect with the anode of the green light LED, and the 4th film is brilliant
For receiving the power supply high voltage of the power management module output, the cathode of the green light LED is used for the drain electrode of body pipe
In the power supply low-voltage for receiving the power management module output；
The both ends of second capacitance are connect respectively with the grid of the 4th thin film transistor (TFT) and source electrode.
Preferably, each pixel unit also includes blue subpixels；It is brilliant that the blue subpixels include the 5th film
Body pipe, the 6th thin film transistor (TFT), third capacitance and blue light-emitting diode；
The drain and gate of 5th thin film transistor (TFT) is respectively connected to third data line and scan line, the 5th film
The source electrode of transistor is connect with the grid of the 6th thin film transistor (TFT)；
The source electrode of 6th thin film transistor (TFT) is connect with the anode of the blue light-emitting diode, and the 6th film is brilliant
For receiving the power supply high voltage of the power management module output, the cathode of the blue light-emitting diode is used for the drain electrode of body pipe
In the power supply low-voltage for receiving the power management module output；
The both ends of the third capacitance are connect respectively with the grid of the 6th thin film transistor (TFT) and source electrode.
Preferably, first capacitance, second capacitance and the third capacitance are storage capacitance.
Preferably, the grid of the first film transistor, the grid of the third thin film transistor (TFT) and the described 5th
The grid access same scan line of thin film transistor (TFT).
The present invention also provides a kind of AMOLED display panels, including above-mentioned driving circuit.
The present invention also provides a kind of driving methods of AMOLED display panels, include the following steps：
Acquire the temperature data at AMOLED display panel sub-pixels；
According to the temperature data, and preset temperature voltage correspondence is combined, the power supply for obtaining the sub-pixel is high
Voltage；
The power supply high voltage of the sub-pixel is exported into the anode of the light emitting diode into corresponding sub-pixel.
Preferably, following step is further included：
The cathode of the light emitting diode of different subpixel in the same power supply low-voltage to same pixel unit of the output phase.
Implement the present invention, have the advantages that：The present invention is by acquiring the temperature at AMOLED display panel sub-pixels
Degrees of data, and temperature data is exported to power management module, power management module according to preset temperature voltage correspondence,
The anode of light emitting diode in corresponding power supply high voltage to sub-pixel is exported, the power supply high voltage of sub-pixel access is mended
It repays so that the pressure difference in sub-pixel between the anode voltage and cathode voltage of light emitting diode can be with the variation of sub-pixel temperature
And change, and then can solve the problems, such as the colour cast of light emitting diode in AMOLED display panels.
Also, since the power management module in the present invention can separately control the power supply high voltage of different light emitting diodes
System, thus when the power supply high voltage of light emitting diode in sub-pixel compensates, it will not be to the electricity of other light emitting diodes
Source high voltage impacts, thus can to avoid the power supply high voltage overcompensation to light emitting diode in other sub-pixels or
The light emitting diode of other sub-pixels is caused colour cast after compensation occur, therefore the present invention has sub-pixel very good compensation effect
Fruit.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 be AMOLED display panels provided by the invention driving circuit in pixel unit circuit diagram.
Fig. 2 be AMOLED display panels provided by the invention driving circuit in power management module and temperature sensor
Schematic diagram.
Fig. 3 is the schematic diagram of AMOLED display panels provided by the invention.
Fig. 4 is the flow chart of the driving method of AMOLED display panels provided by the invention.
Specific embodiment
The present invention provides a kind of driving circuit of AMOLED display panels, which includes：Multiple pixel units, often
A pixel unit include three sub-pixels 31,32,33, driving circuit further include power management module and at least one sub- picture
The corresponding temperature sensor of element.The circuit diagram of pixel unit is as shown in Figure 1, power management module and temperature sensor such as Fig. 2 institutes
Show.
It is included there are one light emitting diode in each sub-pixel, and the cathode of the light emitting diode in each pixel unit
It is all connected to same node.
Temperature sensor 1 is connect with power management module 2, for acquiring the temperature data at least one sub-pixel, and
Temperature data is exported to power management module 2.Preferably, the quantity of temperature sensor is identical with the quantity of sub-pixel, each
A temperature sensor 1 is designed at sub-pixel.
Power management module 2, to the cathode of light emitting diode, is additionally operable to according to sub-pixel for out-put supply low-voltage VSS
The temperature data at place, and preset temperature voltage correspondence is combined, obtain corresponding power supply high voltage VDD_R/VDD_G/
VDD_B, and power supply high voltage VDD_R/VDD_G/VDD_B is exported to the anode of the light emitting diode into corresponding sub-pixel.
Further, each pixel unit includes red sub-pixel 31；It is brilliant that red sub-pixel 31 includes the first film
Body pipe T1, the second thin film transistor (TFT) T2, the first capacitance C1 and red light-emitting diode OLED_R.
The drain and gate of first film transistor T1 is respectively connected to the first data line Data_R and scan line Gate, and first
The source electrode of thin film transistor (TFT) T1 is connect with the grid of the second thin film transistor (TFT) T2.
The source electrode of second thin film transistor (TFT) T2 is connect with the anode of red light-emitting diode OLED_R, the second thin film transistor (TFT)
The drain electrode of T2 for receive power management module 2 output power supply high voltage VDD_R, the cathode of red light-emitting diode OLED_R
For receiving the power supply low-voltage VSS of the output of power management module 2.
The both ends of first capacitance C1 are connect respectively with the grid of the second thin film transistor (TFT) T2 and source electrode.
Further, each pixel unit also includes green sub-pixels 32；Green sub-pixels 32 include third film
Transistor T3, the 4th thin film transistor (TFT) T4, the second capacitance C2 and green light LED OLED_G.
The drain and gate of third thin film transistor (TFT) T3 is respectively connected to the second data line Data_G and scan line Gate, third
The source electrode of thin film transistor (TFT) T3 is connect with the grid of the 4th thin film transistor (TFT) T4.
The source electrode of 4th thin film transistor (TFT) T4 is connect with the anode of green light LED OLED_G, the 4th thin film transistor (TFT)
The drain electrode of T4 for receive power management module 2 output power supply high voltage VDD_G, the cathode of green light LED OLED_G
For receiving the power supply low-voltage VSS of the output of power management module 2.
The both ends of second capacitance C2 are connect respectively with the grid of the 4th thin film transistor (TFT) T4 and source electrode.
Further, each pixel unit also includes blue subpixels 33；Blue subpixels 33 include the 5th film
Transistor T5, the 6th thin film transistor (TFT) T6, third capacitance C3 and blue light-emitting diode OLED_B.
The drain and gate of 5th thin film transistor (TFT) T5 is respectively connected to third data line Data_B and scan line Gate, and the 5th
The source electrode of thin film transistor (TFT) T5 is connect with the grid of the 6th thin film transistor (TFT) T6.
The source electrode of 6th thin film transistor (TFT) T6 is connect with the anode of blue light-emitting diode OLED_B, the 6th thin film transistor (TFT)
The drain electrode of T6 for receive power management module 2 output power supply high voltage VDD_B, the cathode of blue light-emitting diode OLED_B
For receiving the power supply low-voltage VSS of the output of power management module 2.
The both ends of third capacitance C3 are connect respectively with the grid of the 6th thin film transistor (TFT) T6 and source electrode.
Red light-emitting diode OLED_R, green light LED OLED_G and blue light-emitting diode OLED_B are
Organic electroluminescent LED.
Further, the first capacitance C1, the second capacitance C2 and third capacitance C3 are storage capacitance.
Further, the grid of first film transistor T1, the grid of third thin film transistor (TFT) T3 and the 5th film are brilliant
The grid access same scan line Gate of body pipe T5.
The present invention also provides a kind of AMOLED display panels, as shown in figure 3, AMOLED display panels 20 include above-mentioned drive
Dynamic circuit 10.
The present invention also provides a kind of driving method of AMOLED display panels in side, as shown in figure 4, this method includes following steps
Suddenly：
Acquire the temperature data at AMOLED display panel sub-pixels；
According to temperature data, and preset temperature voltage correspondence is combined, obtain the power supply high voltage VDD_ of sub-pixel
R/VDD_G/VDD_B；
The power supply high voltage VDD_R/VDD_G/VDD_B of sub-pixel is exported to the light emitting diode into corresponding sub-pixel
Anode.
Further, the driving method of AMOLED display panels further includes following step：
The cathode of the light emitting diode of different subpixel in the same power supply low-voltage VSS to same pixel unit of the output phase.
In conclusion the present invention is by acquiring the temperature data at AMOLED display panel sub-pixels, and by temperature data
It is high to export corresponding power supply according to preset temperature voltage correspondence for output to power management module 2, power management module 2
The anode of light emitting diode in voltage to sub-pixel, the power supply high voltage accessed to light emitting diode in sub-pixel compensate,
At this time light emitting diode access power supply low-voltage VSS it is then constant, therefore in sub-pixel light emitting diode anode voltage and the moon
Pressure difference between pole tension can change with the variation of sub-pixel temperature, and then can solve to shine in AMOLED display panels
The colour cast problem of diode.
Specifically, when the temperature of sub-pixel increases, the high electricity of power supply of light emitting diode in corresponding sub-pixel can be turned up
Pressure conversely, when the temperature of sub-pixel reduces, can turn down the power supply high voltage of light emitting diode in corresponding sub-pixel.
Also, since the power management module 2 in the present invention can separate the power supply high voltage of different light emitting diodes
Control, thus when the power supply high voltage of light emitting diode in sub-pixel compensates, it will not be to the hair in other sub-pixels
The power supply high voltage of optical diode impacts, thus can be to avoid the power supply high voltage to light emitting diode in other sub-pixels
Overcompensation causes the light emitting diode of other sub-pixels colour cast after compensation occur, therefore the present invention has very sub-pixel
Good compensation effect.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, it is impossible to assert
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, several simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (9)
1. a kind of driving circuit of AMOLED display panels, which is characterized in that including：Multiple pixel units, each pixel unit
Including three sub-pixels, the driving circuit further includes power management module and temperature corresponding at least one sub-pixel passes
Sensor；
It is included there are one light emitting diode in each sub-pixel, and the cathode of the light emitting diode in each pixel unit connects
It is connected to same node；
The temperature sensor is connect with the power management module, for acquiring the temperature at least one sub-pixel
Data, and the temperature data is exported to the power management module；
The power management module for out-put supply low-voltage to the cathode of the light emitting diode, is additionally operable to according to
Temperature data, and combine preset temperature voltage correspondence, obtains corresponding power supply high voltage, and by the power supply high voltage
It exports to the anode of the light emitting diode in corresponding sub-pixel.
2. the driving circuit of AMOLED display panels according to claim 1, which is characterized in that each pixel unit wraps
Contain red sub-pixel；The red sub-pixel includes first film transistor, the second thin film transistor (TFT), the first capacitance and red
Light-emitting diode；
The drain and gate of the first film transistor is respectively connected to the first data line and scan line, the first film crystal
The source electrode of pipe is connect with the grid of second thin film transistor (TFT)；
The source electrode of second thin film transistor (TFT) is connect with the anode of the red light-emitting diode, second thin film transistor (TFT)
Drain electrode for receiving the power supply high voltage of power management module output, the cathode of the red light-emitting diode is for connecing
Receive the power supply low-voltage of the power management module output；
The both ends of first capacitance are connect respectively with the grid of second thin film transistor (TFT) and source electrode.
3. the driving circuit of AMOLED display panels according to claim 2, which is characterized in that each pixel unit is also equal
Include green sub-pixels；The green sub-pixels include third thin film transistor (TFT), the 4th thin film transistor (TFT), the second capacitance and
Green light LED；
The drain and gate of the third thin film transistor (TFT) is respectively connected to the second data line and scan line, the third film crystal
The source electrode of pipe is connect with the grid of the 4th thin film transistor (TFT)；
The source electrode of 4th thin film transistor (TFT) is connect with the anode of the green light LED, the 4th thin film transistor (TFT)
Drain electrode for receiving the power supply high voltage of power management module output, the cathode of the green light LED is for connecing
Receive the power supply low-voltage of the power management module output；
The both ends of second capacitance are connect respectively with the grid of the 4th thin film transistor (TFT) and source electrode.
4. the driving circuit of AMOLED display panels according to claim 3, which is characterized in that each pixel unit is also equal
Include blue subpixels；The blue subpixels include the 5th thin film transistor (TFT), the 6th thin film transistor (TFT), third capacitance and
Blue light-emitting diode；
The drain and gate of 5th thin film transistor (TFT) is respectively connected to third data line and scan line, the 5th film crystal
The source electrode of pipe is connect with the grid of the 6th thin film transistor (TFT)；
The source electrode of 6th thin film transistor (TFT) is connect with the anode of the blue light-emitting diode, the 6th thin film transistor (TFT)
Drain electrode for receiving the power supply high voltage of power management module output, the cathode of the blue light-emitting diode is for connecing
Receive the power supply low-voltage of the power management module output；
The both ends of the third capacitance are connect respectively with the grid of the 6th thin film transistor (TFT) and source electrode.
5. the driving circuit of AMOLED display panels according to claim 4, which is characterized in that first capacitance, institute
It is storage capacitance to state the second capacitance and the third capacitance.
6. the driving circuit of AMOLED display panels according to claim 4, which is characterized in that the first film crystal
The grid access same scanning of the grid of pipe, the grid of the third thin film transistor (TFT) and the 5th thin film transistor (TFT)
Line.
7. a kind of AMOLED display panels, which is characterized in that including claim 1 ~ 6 any one of them driving circuit.
8. a kind of driving method of AMOLED display panels, which is characterized in that include the following steps：
Acquire the temperature data at AMOLED display panel sub-pixels；
According to the temperature data, and preset temperature voltage correspondence is combined, obtain the power supply high voltage of the sub-pixel；
The power supply high voltage of the sub-pixel is exported into the anode of the light emitting diode into corresponding sub-pixel.
9. the driving method of AMOLED display panels according to claim 8, which is characterized in that further include following step：
The cathode of the light emitting diode of different subpixel in the same power supply low-voltage to same pixel unit of the output phase.
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| CN113270070A (en) * | 2021-05-25 | 2021-08-17 | 武汉华星光电技术有限公司 | Autonomous light emitting display device |
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| CN113270070A (en) * | 2021-05-25 | 2021-08-17 | 武汉华星光电技术有限公司 | Autonomous light emitting display device |
| WO2022246887A1 (en) * | 2021-05-25 | 2022-12-01 | 武汉华星光电技术有限公司 | Autonomous light emitting display device |
| CN114420028A (en) * | 2022-01-20 | 2022-04-29 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114420028B (en) * | 2022-01-20 | 2024-04-16 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114743471A (en) * | 2022-04-25 | 2022-07-12 | 武汉华星光电半导体显示技术有限公司 | OLED display panel and display device |
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