WO2019024256A1 - 具有温度补偿功能的amoled显示面板及显示装置 - Google Patents
具有温度补偿功能的amoled显示面板及显示装置 Download PDFInfo
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- WO2019024256A1 WO2019024256A1 PCT/CN2017/106880 CN2017106880W WO2019024256A1 WO 2019024256 A1 WO2019024256 A1 WO 2019024256A1 CN 2017106880 W CN2017106880 W CN 2017106880W WO 2019024256 A1 WO2019024256 A1 WO 2019024256A1
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- thin film
- film transistor
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- display panel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
Definitions
- the present invention relates to the field of display technologies, and in particular, to an AMOLED display panel and a display device having a temperature compensation function.
- FIG. 1 is a schematic structural diagram of a pixel driving circuit of a conventional AMOLED display panel.
- the pixel driving circuit includes a first thin film transistor T11, a second thin film transistor T12, a third thin film transistor T13, a storage capacitor C11, and an organic light emitting diode D11.
- the gate of the first thin film transistor T11 is connected to the scan signal SCAN, the source is connected to the data signal DATA, and the drain is electrically connected to the first node P.
- the gate of the second thin film transistor T12 is electrically connected to the first node P, the source is electrically connected to the driving voltage Ovdd, and the drain is electrically connected to the second node Q.
- the gate of the third thin film transistor T13 is connected to the detection pulse signal Sen, the source is connected to the detection control signal Mon, and the drain is electrically connected to the second node Q.
- One end of the storage capacitor C11 is electrically connected to the first node P, and the other end is electrically connected to the second node Q.
- the anode of the organic light emitting diode D10 is electrically connected to the second node Q, and the cathode is electrically connected to the driving voltage Ovss.
- the detection control signal Mon is used to detect the threshold voltage of the organic light emitting diode D11 and the second thin film transistor T12 thereof to compensate the data signal according to the detected threshold voltage, so that the brightness of the organic light emitting diode D11 is constant. .
- the panel temperature is increased, and the temperature of the excessively high AMOLED display panel causes the threshold voltage of the second thin film transistor T12 to shift, thereby causing the current through the organic light emitting diode D11 to increase. Large, and thus shorten the service life of the organic light emitting diode D11 in the AMOLED display panel.
- An object of the present invention is to provide an AMOLED display panel and a display device with temperature compensation function capable of detecting and adjusting a panel temperature, so as to solve the technical problem that the lifetime of the organic light emitting diode in the conventional AMOLED display panel and the display device is short.
- An embodiment of the present invention provides an AMOLED display panel having a temperature compensation function, including a data line, a scan line, a plurality of pixel units formed by interleaving the data line and the scan line, and adjusting the AMOLED display. a temperature adjustment unit for the panel temperature of the panel;
- the pixel unit of the preset position is correspondingly provided with a first pixel driving circuit having a pixel driving function and a temperature detecting function, and the pixel unit at other positions is correspondingly provided with a second pixel driving circuit having a pixel driving function;
- An input end of the temperature adjustment unit is connected to the first pixel driving circuit to receive a temperature detection signal corresponding to the pixel unit; an output end of the temperature adjustment unit is connected to the data line to be according to the temperature The detection signal adjusts the data signal;
- the first pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- one end of the storage capacitor is connected to a gate of the second thin film transistor, and the other end of the storage capacitor is connected to a drain of the third thin film transistor;
- a gate of the fourth thin film transistor is connected to a temperature adjustment unit, a source of the fourth thin film transistor is connected to a drain of the third thin film transistor, and a drain of the fourth thin film transistor Connected to the anode of the organic light emitting diode;
- the second pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- a storage capacitor one end of the storage capacitor being connected to a gate of the second thin film transistor, and the other end of the storage capacitor being connected to a drain of the third thin film transistor;
- An organic light emitting diode having a positive electrode connected to a drain of the third thin film transistor and a negative electrode of the organic light emitting diode being grounded.
- An embodiment of the present invention further provides an AMOLED display panel having a temperature compensation function, including a data line, a scan line, a plurality of pixel units formed by interleaving the data line and the scan line, and adjusting the AMOLED. a temperature adjustment unit that displays the panel temperature of the panel;
- the pixel unit of the preset position is correspondingly provided with a first pixel driving circuit having a pixel driving function and a temperature detecting function, and the pixel unit at other positions is correspondingly provided with a second pixel driving circuit having a pixel driving function;
- An input end of the temperature adjustment unit is connected to the first pixel driving circuit to receive a temperature detection signal corresponding to the pixel unit; an output end of the temperature adjustment unit is connected to the data line to be according to the temperature The detection signal adjusts the data signal.
- the first pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- one end of the storage capacitor is connected to a gate of the second thin film transistor, and the other end of the storage capacitor is connected to a drain of the third thin film transistor;
- a gate of the fourth thin film transistor is connected to a temperature adjustment unit, a source of the fourth thin film transistor is connected to a drain of the third thin film transistor, and a drain of the fourth thin film transistor Connected to the anode of the organic light emitting diode;
- An organic light emitting diode a negative electrode of the organic light emitting diode and a ground.
- the second pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- a storage capacitor one end of the storage capacitor being connected to a gate of the second thin film transistor, and the other end of the storage capacitor being connected to a drain of the third thin film transistor;
- An organic light emitting diode having a positive electrode connected to a drain of the third thin film transistor and a negative electrode of the organic light emitting diode being grounded.
- the preset position is a central position of the AMOLED display panel or a temperature sampling position of the AMOLED display panel.
- each frame of the pixel unit of the preset position of the AMOLED display panel includes a pixel driving phase, a driving holding phase, and a temperature detecting phase which are sequentially performed.
- the first thin film transistor, the second thin film transistor, the third thin film transistor, and the The fourth thin film transistor is turned on; and the corresponding data line inputs a data signal, and the detection signal line outputs a data compensation signal;
- the first thin film transistor, the second thin film transistor, and the third thin film crystal are both turned off when the pixel unit is in a driving holding phase, and the fourth thin film transistor is turned on to pass the storage capacitor The luminous intensity of the organic light emitting diode is maintained.
- the first thin film transistor, the second thin film transistor, and the third thin film transistor are both turned on.
- the fourth thin film transistor is turned off, the organic light emitting diode stops emitting light, and the corresponding data line inputs a preset gray scale signal, and the detection signal line outputs a temperature detection signal.
- the step of adjusting the data signal by the temperature adjustment unit according to the temperature detection signal includes:
- the adjusting the data signal includes adjusting a grayscale value of the data signal or adjusting a gamma value of the data signal.
- An embodiment of the present invention further provides an AMOLED display device including an AMOLED display panel having a temperature compensation function, the AMOLED display panel including a data line, a scan line, and a plurality of data lines and the scan line interlaced a pixel unit, and a temperature adjustment unit for adjusting a panel temperature of the AMOLED display panel;
- the pixel unit of the preset position is correspondingly provided with a first pixel driving circuit having a pixel driving function and a temperature detecting function, and the pixel unit at other positions is correspondingly provided with a second pixel driving circuit having a pixel driving function;
- An input end of the temperature adjustment unit is connected to the first pixel driving circuit to receive a temperature detection signal corresponding to the pixel unit; an output end of the temperature adjustment unit is connected to the data line to be according to the temperature The detection signal adjusts the data signal.
- the first pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- one end of the storage capacitor is connected to a gate of the second thin film transistor, and the other end of the storage capacitor is connected to a drain of the third thin film transistor;
- a gate of the fourth thin film transistor is connected to a temperature adjustment unit, a source of the fourth thin film transistor is connected to a drain of the third thin film transistor, and a drain of the fourth thin film transistor Connected to the anode of the organic light emitting diode;
- An organic light emitting diode a negative electrode of the organic light emitting diode and a ground.
- the second pixel driving circuit includes:
- a gate of the first thin film transistor is connected to a corresponding scan line, a source of the first thin film transistor is connected to a corresponding data line, and a drain and a second film of the first thin film transistor The gate connection of the transistor;
- a source of the second thin film transistor is connected to a driving voltage source, and a drain of the second thin film transistor is connected to a drain of the third thin film transistor;
- a source of the third thin film transistor is connected to a corresponding detection signal line, and a gate of the third thin film transistor is connected to a detection control signal line;
- a storage capacitor one end of the storage capacitor being connected to a gate of the second thin film transistor, and the other end of the storage capacitor being connected to a drain of the third thin film transistor;
- An organic light emitting diode having a positive electrode connected to a drain of the third thin film transistor and a negative electrode of the organic light emitting diode being grounded.
- the preset position is a central position of the AMOLED display panel or a temperature sampling position of the AMOLED display panel.
- each frame of the pixel unit of the preset position of the AMOLED display panel includes a pixel driving phase, a driving holding phase, and a temperature detecting phase that are sequentially performed.
- the first thin film transistor, the second thin film transistor, the third thin film transistor, and the fourth thin film transistor are both Turning on; and the corresponding data line inputs a data signal, and the detection signal line outputs a data compensation signal;
- the first thin film transistor, the second thin film transistor, and the third thin film crystal are both turned off when the pixel unit is in a driving holding phase, and the fourth thin film transistor is turned on to pass the storage capacitor The luminous intensity of the organic light emitting diode is maintained.
- the first thin film transistor, the second thin film transistor, and the third thin film transistor are both turned on, and the fourth The thin film transistor is turned off, the organic light emitting diode stops emitting light, and the corresponding data line inputs a preset gray scale signal, and the detection signal line outputs a temperature detection signal.
- the step of adjusting the data signal by the temperature adjustment unit according to the temperature detection signal includes:
- the adjusting the data signal includes adjusting a grayscale value of the data signal or adjusting a Gamma value of the data signal.
- the AMOLED display panel and the display device with temperature compensation function of the invention realize real-time detection and real-time adjustment of the panel temperature of the AMOLED display panel by the setting of the first pixel driving circuit with the temperature detecting function, and the first pixel driving circuit
- the structure is simple; the technical problem of short service life of the organic light emitting diode in the existing AMOLED display panel and the display device is effectively solved.
- FIG. 1 is a schematic structural diagram of a pixel driving circuit of a conventional AMOLED display panel
- FIG. 2 is a schematic structural view of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention
- FIG. 3 is a schematic structural diagram of a first pixel driving circuit of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention
- FIG. 4 is a schematic structural diagram of a second pixel driving circuit of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention
- FIG. 5 is a driving waveform diagram of a preferred embodiment of an AMOLED display panel with temperature compensation function of the present invention.
- FIG. 2 is a schematic structural diagram of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention.
- the AMOLED display panel 20 with temperature compensation function of the preferred embodiment includes data lines, scan lines (such as SCAN1, SCAN2, and SCANn, etc.), a plurality of pixel units 21 formed by interleaving data lines and scan lines, and for adjusting AMOLED display.
- the temperature adjustment unit 22 of the panel temperature of the panel is a schematic structural diagram of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention.
- the AMOLED display panel 20 with temperature compensation function of the preferred embodiment includes data lines, scan lines (such as SCAN1, SCAN2, and SCANn, etc.), a plurality of pixel units 21 formed by interleaving data lines and scan lines, and for adjusting AMOLED display.
- the temperature adjustment unit 22 of the panel temperature of the panel is not limited to a Wi-Fi, CAN1, SCAN2, and SCANn, etc.
- the data signal of the data line is generated by the data driving chip 23, and the scanning signal of the scanning line is generated by the scanning driving chip 24.
- the pixel unit 21 in FIG. 2 is divided into two types, one is a pixel unit 21A having a pixel driving function and a temperature detecting function, and the other is a pixel having a pixel driving function.
- Unit 21B The pixel unit 21A in the preset position is provided with the first pixel driving circuit 30 for display driving, and the pixel unit 21B at other positions is provided with the second pixel driving circuit 40 for display driving.
- the preset position here may be a central position of the AMOLED display panel 20 or a temperature sampling position of the AMOLED display panel, as shown by the pixel unit 21A in FIG.
- the temperature sampling position can also be set according to the user's requirements.
- the input end of the temperature adjustment unit 22 is connected to the first pixel driving circuit 30 to receive the temperature detection signal corresponding to the pixel unit 21A; the output end of the temperature adjustment unit 22 is connected to the data line through the data driving chip 23 to detect the signal according to the temperature. Adjust the data signal.
- FIG. 3 is a schematic structural view of a first pixel driving circuit of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention.
- the first pixel driving circuit 30 includes a first thin film transistor T31, a second thin film transistor T32, a third thin film transistor T33, a storage capacitor C31, a fourth thin film transistor T34, and an organic light emitting diode D31.
- the gate of the first thin film transistor T31 is connected to the corresponding scan line SCAN, the source of the first thin film transistor T31 is connected to the corresponding data line DATA, and the drain of the first thin film transistor T31 is connected to the gate of the second thin film transistor T32.
- the source of the second thin film transistor T32 is connected to the driving voltage source Ovvd
- the drain of the second thin film transistor T32 is connected to the drain of the third thin film transistor T33
- the gate T33 of the third thin film transistor is connected to the detection control signal line Sen
- one end of the storage capacitor C31 is connected to the gate of the second thin film transistor T32
- the other end of the storage capacitor C31 is connected to the drain of the third thin film transistor T33.
- the gate of the fourth thin film transistor T34 is connected to the temperature adjustment unit 22, the source of the fourth thin film transistor T34 is connected to the drain of the third thin film transistor T33, the drain of the fourth thin film transistor T34 and the anode of the organic light emitting diode D31. Connection; the negative electrode of the organic light emitting diode D31 and the ground (connected to the driving voltage source Ovvs).
- FIG. 4 is a schematic structural view of a second pixel driving circuit of a preferred embodiment of an AMOLED display panel with temperature compensation function according to the present invention.
- the second pixel driving circuit 40 includes a first thin film transistor T41, a second thin film transistor T42, a third thin film transistor T43, a storage capacitor C41, and an organic light emitting diode D41.
- the gate of the first thin film transistor T41 is connected to the corresponding scan line SCAN, the source of the first thin film transistor T41 is connected to the corresponding data line DATA, and the drain of the first thin film transistor T41 is connected to the gate of the second thin film transistor T42.
- the source of the second thin film transistor T42 is connected to the driving voltage source Ovvd
- the drain of the second thin film transistor T42 is connected to the drain of the third thin film transistor T43
- the gate of the third thin film transistor T43 is connected to the detection control signal line Sen
- one end of the storage capacitor C41 is connected to the gate of the second thin film transistor T42
- the other end of the storage capacitor C41 is connected to the drain of the third thin film transistor T43.
- the anode of the organic light emitting diode D41 is connected to the drain of the third thin film transistor T43, and the cathode of the organic light emitting diode D41 is grounded (connected to the driving voltage source Ovvs).
- FIG. 5 is a driving waveform diagram of a preferred embodiment of an AMOLED display panel with temperature compensation function of the present invention.
- Each frame of the pixel unit (such as the pixel unit 21A in FIG. 2) of the preset position of the AMOLED display panel of the preferred embodiment includes a pixel driving phase, a driving holding phase, and a temperature detecting phase which are sequentially performed.
- the first thin film transistor T31, the second thin film transistor T32, the third thin film transistor T33, and the fourth thin film transistor T34 of the first pixel driving circuit 30 are both turned on;
- the data line DATA is input to the data signal, and the detection signal line Mon is outputting the data compensation signal.
- the first thin film transistor T31, the second thin film transistor T32, and the third thin film crystal T33 of the first pixel driving circuit 30 are both turned off, and the fourth thin film transistor T34 is turned on.
- the light emission intensity of the organic light emitting diode D31 is maintained by the storage capacitor C31.
- the first thin film transistor T31, the second thin film transistor T32, and the third thin film transistor T33 of the first pixel driving circuit 30 are both turned on, and the fourth thin film transistor T34 is turned off.
- the organic light emitting diode D31 stops emitting light, and the corresponding data line DATA is input to a preset gray scale signal, and the detection signal line Mon outputs a temperature detection signal.
- Each frame of the pixel unit 21B at other positions of the AMOLED display panel of the preferred embodiment includes a pixel driving phase and a driving holding phase which are sequentially performed.
- the specific working principle is consistent with the pixel driving phase and the driving holding phase of the pixel unit 21A at the preset position.
- the first thin film transistor T31, the second thin film transistor T32, the third thin film transistor T33, and the fourth thin film transistor T34 are both turned on; corresponding scan lines SCAN2 inputs a high-level scan signal, data line DATA inputs a data signal, and the organic light-emitting diode D31 normally emits light to ensure normal display of the pixel unit 21A.
- the detection control signal line Sen2 also inputs a high level, and the corresponding detection signal at this time Line Mon outputs a data compensation signal.
- the pixel unit 21A is in the driving and holding phase, the first thin film transistor T31, the second thin film transistor T32, and the third thin film crystal T33 are both turned off, and the fourth thin film transistor T34 is turned on, and the luminous intensity of the organic light emitting diode D31 is maintained by the storage capacitor C31. .
- the scan line SCAN2 and the detection control signal line Sen2 each input a low level signal.
- the pixel unit 21A After the entire frame picture is scanned, that is, after the current picture frame display is driven, the pixel unit 21A is in the temperature detecting phase, and the first thin film transistor T31, the second thin film transistor T32, and the third thin film transistor T33 are both turned on, and the fourth thin film transistor is turned on.
- T34 When T34 is turned off, the organic light emitting diode D31 stops emitting light.
- the gate of the fourth thin film transistor T34 is input with a low level turn-off signal Ctr
- the scan line SCAN2 and the detection control signal line Sen2 are both input with a high level signal
- the data line DATA passes through the first thin film transistor T31 and the second thin film transistor.
- the detection signal line Mon can output a temperature detection signal through the third thin film transistor T33.
- the high level time length of the scan line SCAN2 should be smaller than the high level time length of the detection control signal line Sen2.
- Other pixel units can display the picture normally.
- the temperature adjustment unit 22 can collect the temperature detection signal corresponding to the pixel unit 21A of the preset position through the detection signal line Mon. Since the detection signal line Mon is used to acquire the data compensation signal during the picture display phase. Therefore, the temperature adjustment unit 22 can be directly disposed in the existing data signal compensation chip, thereby further reducing the manufacturing cost of the AMOLED display panel.
- the temperature adjustment unit 22 can then calculate the detection current of the corresponding second thin film transistor T32 based on the temperature detection signal. The temperature adjustment unit 22 then calculates the average current value of the detection current corresponding to the pixel unit 21A of all the preset positions.
- the final temperature adjustment unit 22 adjusts the data signal through the data driving chip 23 according to the average current value and the preset threshold current, so that the average current value of the adjusted detection current is less than or equal to the preset threshold current, thereby avoiding the AMOLED display panel 20 The panel temperature is too high.
- the data signal is adjusted in the manner of adjusting the grayscale value of the data signal or adjusting the gamma value of the data signal.
- the present invention also provides an AMOLED display device comprising the above-described AMOLED display panel with temperature compensation function.
- the specific working principle of the AMOLED display device of the present invention is the same as or similar to the description in the preferred embodiment of the AMOLED display panel with temperature compensation function.
- the AMOLED display panel and the display device with temperature compensation function of the invention realize real-time detection and real-time adjustment of the panel temperature of the AMOLED display panel by the setting of the first pixel driving circuit with the temperature detecting function, and the first pixel driving circuit
- the structure is simple; the technical problem of short service life of the organic light emitting diode in the existing AMOLED display panel and the display device is effectively solved.
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Abstract
一种具有温度补偿功能的AMOLED显示面板(20)，其包括数据线、扫描线、多个像素单元(21)、以及温度调节单元(22)；其中预设位置的像素单元(21A)对应设置有第一像素驱动电路(30)，其他位置的像素单元(21B)对应设置有第二像素驱动电路(40)；温度调节单元(22)的输入端与第一像素驱动电路(30)连接；温度调节单元(22)的输出端与数据线连接。
Description
本发明涉及显示技术领域，特别是涉及一种具有温度补偿功能的AMOLED显示面板及显示装置。
请参照图1，图1为一种现有的AMOLED显示面板的像素驱动电路的结构示意图。该像素驱动电路包括第一薄膜晶体管T11、第二薄膜晶体管T12、第三薄膜晶体管T13、存储电容C11、以及有机发光二极管D11。
其中第一薄膜晶体管T11的栅极接入扫描信号SCAN，源极接入数据信号DATA，漏极电性连接第一节点P。第二薄膜晶体管T12的栅极电性连接第一节点P，源极电性连接驱动电压Ovdd，漏极电性连接第二节点Q。第三薄膜晶体管T13的栅极接入检测脉冲信号Sen，源极接入检测控制信号Mon，漏极电性连接第二节点Q。存储电容C11的一端电性连接第一节点P，另一端电性连接第二节点Q；有机发光二极管D10的阳极电性连接于第二节点Q，阴极电性连接于驱动电压Ovss。其中，侦测控制信号Mon用于对有机发光二极管D11及其驱动第二薄膜晶体管T12的阈值电压进行检测，以根据检测到的阈值电压对数据信号进行补偿，从而使得有机发光二极管D11的亮度恒定。
但是现有的AMOLED显示面板长时间使用时会造成面板温度升高，而过高的AMOLED显示面板的温度会导致第二薄膜晶体管T12的阈值电压偏移，从而导致通过有机发光二极管D11的电流增大，进而缩短了AMOLED显示面板中有机发光二极管D11的使用寿命。
故，有必要提供一种具有温度补偿功能的AMOLED显示面板及显示装置，以解决现有技术所存在的问题。
本发明的目的在于提供可对面板温度进行检测调整的具有温度补偿功能的AMOLED显示面板及显示装置；以解决现有的AMOLED显示面板及显示装置中有机发光二极管的使用寿命较短的技术问题。
本发明实施例提供一种具有温度补偿功能的AMOLED显示面板，其包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；
其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；
所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整；
所述第一像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；
第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及
有机发光二极管，所述有机发光二极管的负极与接地；
所述第二像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及
有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
本发明实施例还提供一种具有温度补偿功能的AMOLED显示面板，其包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；
其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；
所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述第一像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；
第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及
有机发光二极管，所述有机发光二极管的负极与接地。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述第二像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及
有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述预设位置为所述AMOLED显示面板的中心位置或所述AMOLED显示面板的温度采样位置。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述AMOLED显示面板的预设位置的像素单元的每一帧画面均包括依次执行的像素驱动阶段、驱动保持阶段以及温度检测阶段。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，当所述像素单元处于像素驱动阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管、所述第三薄膜晶体管以及所述第四薄膜晶体管均导通；且对应的数据线输入数据信号，所述检测信号线输出数据补偿信号；
当所述像素单元处于驱动保持阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体均断开，所述第四薄膜晶体管导通，以通过所述存储电容维持所述有机发光二极管的发光强度。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，当所述像素单元处于温度检测阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体管均导通，所述第四薄膜晶体管断开，所述有机发光二极管停止发光，且对应的数据线输入预设灰阶信号，所述检测信号线输出温度检测信号。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述温度调节单元根据温度检测信号对数据信号进行调整的步骤包括：
获取所有预设位置的像素单元对应的温度检测信号，并基于所述温度检测信号计算对应所述第二薄膜晶体管的检测电流；
计算所有预设位置的像素单元对应的检测电流的平均电流值；以及
根据所述平均电流值与预设阈值电流，对所述数据信号进行调整，以使得调整后的检测电流的平均电流值小于等于所述预设阈值电流。
在本发明所述的具有温度补偿功能的AMOLED显示面板中，所述对数据信号进行调整包括对数据信号的灰阶值进行调整或对数据信号的Gamma值进行调整。
本发明实施例还提供一种AMOLED显示装置，其包括具有温度补偿功能的AMOLED显示面板，所述AMOLED显示面板包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；
其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；
所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整。
在本发明所述的AMOLED显示装置中，所述第一像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；
第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及
有机发光二极管，所述有机发光二极管的负极与接地。
在本发明所述的AMOLED显示装置中，所述第二像素驱动电路包括：
第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；
第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；
第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；
存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及
有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
在本发明所述的AMOLED显示装置中，所述预设位置为所述AMOLED显示面板的中心位置或所述AMOLED显示面板的温度采样位置。
在本发明所述的AMOLED显示装置中，所述AMOLED显示面板的预设位置的像素单元的每一帧画面均包括依次执行的像素驱动阶段、驱动保持阶段以及温度检测阶段。
在本发明所述的AMOLED显示装置中，当所述像素单元处于像素驱动阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管、所述第三薄膜晶体管以及所述第四薄膜晶体管均导通；且对应的数据线输入数据信号，所述检测信号线输出数据补偿信号；
当所述像素单元处于驱动保持阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体均断开，所述第四薄膜晶体管导通，以通过所述存储电容维持所述有机发光二极管的发光强度。
在本发明所述的AMOLED显示装置中，当所述像素单元处于温度检测阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体管均导通，所述第四薄膜晶体管断开，所述有机发光二极管停止发光，且对应的数据线输入预设灰阶信号，所述检测信号线输出温度检测信号。
在本发明所述的AMOLED显示装置中，所述温度调节单元根据温度检测信号对数据信号进行调整的步骤包括：
获取所有预设位置的像素单元对应的温度检测信号，并基于所述温度检测信号计算对应所述第二薄膜晶体管的检测电流；
计算所有预设位置的像素单元对应的检测电流的平均电流值；以及
根据所述平均电流值与预设阈值电流，对所述数据信号进行调整，以使得调整后的检测电流的平均电流值小于等于所述预设阈值电流。
在本发明所述的AMOLED显示装置中，所述对数据信号进行调整包括对数据信号的灰阶值进行调整或对数据信号的Gamma值进行调整。
本发明的具有温度补偿功能的AMOLED显示面板及显示装置通过具有温度检测功能的第一像素驱动电路的设置，实现了对AMOLED显示面板的面板温度的实时检测以及实时调整，且第一像素驱动电路的结构简单；有效的解决了现有的AMOLED显示面板及显示装置中有机发光二极管的使用寿命较短的技术问题。
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。其中：
图1为一种现有的AMOLED显示面板的像素驱动电路的结构示意图；
图2为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的结构示意图；
图3为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的第一像素驱动电路的结构示意图；
图4为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的第二像素驱动电路的结构示意图；
图5为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的驱动波形图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参照图2，图2为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的结构示意图。本优选实施例的具有温度补偿功能的AMOLED显示面板20包括数据线、扫描线（如SCAN1、SCAN2以及SCANn等）、由数据线和扫描线交错形成的多个像素单元21以及用于调节AMOLED显示面板的面板温度的温度调节单元22。
其中数据线的数据信号由数据驱动芯片23产生，扫描线的扫描信号由扫描驱动芯片24产生。
图2中的像素单元21分为两类，一类是设置在预设位置，具有像素驱动功能和温度检测功能的像素单元21A；另一类是设置在其他位置，仅具有像素驱动功能的像素单元21B。其中预设位置的像素单元21A设置有第一像素驱动电路30对其进行显示驱动，其他位置的像素单元21B设置有第二像素驱动电路40对其进行显示驱动。
优选的，这里预设位置可为AMOLED显示面板20的中心位置，或AMOLED显示面板的温度采样位置，如图2中的像素单元21A所示。当然温度采样位置还可根据用户的要求进行设定。
其中温度调节单元22的输入端与第一像素驱动电路30连接，以接收像素单元21A对应的温度检测信号；温度调节单元22的输出端通过数据驱动芯片23与数据线连接，以根据温度检测信号对数据信号进行调整。
图2中的预设位置的像素单元21A对应的第一像素驱动电路30的具体电路图如图3所示。图3为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的第一像素驱动电路的结构示意图。该第一像素驱动电路30包括第一薄膜晶体管T31、第二薄膜晶体管T32、第三薄膜晶体管T33、存储电容C31、第四薄膜晶体管T34以及有机发光二极管D31。
第一薄膜晶体管T31的栅极与相应的扫描线SCAN连接，第一薄膜晶体管T31的源极与相应的数据线DATA连接，第一薄膜晶体管T31的漏极与第二薄膜晶体管T32的栅极连接；第二薄膜晶体管T32的源极与驱动电压源Ovvd连接，第二薄膜晶体管T32的漏极与第三薄膜晶体管T33的漏极连接；第三薄膜晶体管T33的源极与相应的检测信号线Mon连接，第三薄膜晶体管的栅极T33与检测控制信号线Sen连接；存储电容C31的一端与第二薄膜晶体管T32的栅极连接，存储电容C31的另一端与第三薄膜晶体管T33的漏极连接；第四薄膜晶体管T34的栅极与温度调节单元22连接，第四薄膜晶体管T34的源极与第三薄膜晶体管T33的漏极连接，第四薄膜晶体管T34的漏极与有机发光二极管D31的正极连接；有机发光二极管D31的负极与接地（与驱动电压源Ovvs连接）。
图2中的其他位置的像素单元对应的第二像素驱动电路的具体电路如图4所示。图4为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的第二像素驱动电路的结构示意图。该第二像素驱动电路40包括第一薄膜晶体管T41、第二薄膜晶体管T42、第三薄膜晶体管T43、存储电容C41以及有机发光二极管D41。
第一薄膜晶体管T41的栅极与相应的扫描线SCAN连接，第一薄膜晶体管T41的源极与相应的数据线DATA连接，第一薄膜晶体管T41的漏极与第二薄膜晶体管T42的栅极连接；第二薄膜晶体管T42的源极与驱动电压源Ovvd连接，第二薄膜晶体管T42的漏极与第三薄膜晶体管T43的漏极连接；第三薄膜晶体管T43的源极与相应的检测信号线Mon连接，第三薄膜晶体管T43的栅极与检测控制信号线Sen连接；存储电容C41的一端与第二薄膜晶体管T42的栅极连接，存储电容C41的另一端与第三薄膜晶体管T43的漏极连接；有机发光二极管D41的正极与第三薄膜晶体管T43的漏极连接，有机发光二极管D41的负极接地（与驱动电压源Ovvs连接）。
下面通过图1-图5详细说明本发明的具有温度补偿功能的AMOLED显示面板的具体工作原理。图5为本发明的具有温度补偿功能的AMOLED显示面板的优选实施例的驱动波形图。
本优选实施例的AMOLED显示面板的预设位置的像素单元（如图2中的像素单元21A）的每一帧画面均包括依次执行的像素驱动阶段、驱动保持阶段以及温度检测阶段。
当预设位置的像素单元21A处于像素驱动阶段时，第一像素驱动电路30的第一薄膜晶体管T31、第二薄膜晶体管T32、第三薄膜晶体管T33以及第四薄膜晶体管T34均导通；且对应的数据线DATA输入数据信号，检测信号线Mon输出数据补偿信号。
当预设位置的像素单元21A处于驱动保持阶段时，第一像素驱动电路30的第一薄膜晶体管T31、第二薄膜晶体管T32以及第三薄膜晶体T33均断开，第四薄膜晶体管T34导通，以通过存储电容C31维持有机发光二极管D31的发光强度。
当预设位置的像素单元21A处于温度检测阶段时，第一像素驱动电路30的第一薄膜晶体管T31、第二薄膜晶体管T32以及第三薄膜晶体管T33均导通，第四薄膜晶体管T34断开，有机发光二极管D31停止发光，且对应的数据线DATA输入预设灰阶信号，检测信号线Mon输出温度检测信号。
本优选实施例的AMOLED显示面板的其他位置的像素单元21B的每一帧画面包括依次执行的像素驱动阶段以及驱动保持阶段。具体工作原理与上述预设位置的像素单元21A的像素驱动阶段以及驱动保持阶段一致。
如图5所示，其中第二行的像素单元21A处于像素驱动阶段，第一薄膜晶体管T31、第二薄膜晶体管T32、第三薄膜晶体管T33以及第四薄膜晶体管T34均导通；相应的扫描线SCAN2输入高电平扫描信号，数据线DATA输入数据信号，有机发光二极管D31正常发光，以保证该像素单元21A的正常显示.同时检测控制信号线Sen2也输入高电平，这时对应的检测信号线Mon输出数据补偿信号。
随后像素单元21A处于驱动保持阶段，第一薄膜晶体管T31、第二薄膜晶体管T32以及第三薄膜晶体T33均断开，第四薄膜晶体管T34导通，通过存储电容C31维持有机发光二极管D31的发光强度。这时扫描线SCAN2以及检测控制信号线Sen2均输入低电平信号。
当整帧画面扫描完毕后，即当前画面帧显示驱动完毕后，像素单元21A处于温度检测阶段，第一薄膜晶体管T31、第二薄膜晶体管T32以及第三薄膜晶体管T33均导通，第四薄膜晶体管T34断开，有机发光二极管D31停止发光。
这时第四薄膜晶体管T34的栅极输入低电平的关断信号Ctr，扫描线SCAN2以及检测控制信号线Sen2均输入高电平信号，数据线DATA通过第一薄膜晶体管T31和第二薄膜晶体管T32输入预设灰阶信号（如128灰阶信号等）后，检测信号线Mon通过第三薄膜晶体管T33可输出温度检测信号。
为了使得预设灰阶信号在存储电容C31两端形成稳定的电压差，这里扫描线SCAN2的高电平时间长度应小于检测控制信号线Sen2的高电平时间长度。而其他像素单元则正常显示画面即可。
这样温度调节单元22可通过检测信号线Mon采集到预设位置的像素单元21A对应的温度检测信号。由于在画面显示阶段，检测信号线Mon用于采集数据补偿信号。因此温度调节单元22可直接设置在现有的数据信号补偿芯片中，进一步降低AMOLED显示面板的制作成本。
随后温度调节单元22可基于温度检测信号计算对应的第二薄膜晶体管T32的检测电流。然后温度调节单元22计算所有预设位置的像素单元21A对应的检测电流的平均电流值。
最后温度调节单元22根据平均电流值与预设阈值电流，通过数据驱动芯片23对数据信号进行调整，以使得调整后的检测电流的平均电流值小于等于预设阈值电流，避免了AMOLED显示面板20的面板温度过高。
优选的，这里的数据信号的调整方式可为对数据信号的灰阶值进行调整或对数据信号的Gamma值进行调整。
这样即完成了本优选实施例的具有温度补偿功能的AMOLED显示面板的预设位置的像素单元的温度采集以及AMOLED显示面板的温度补偿过程。
本发明还提供一种AMOLED显示装置，该AMOLED显示装置包括上述具有温度补偿功能的AMOLED显示面板。本发明的AMOLED显示装置的具体工作原理与上述的具有温度补偿功能的AMOLED显示面板的优选实施例中的描述相同或相似，具体请参见上述具有温度补偿功能的AMOLED显示面板的优选实施例中的相关描述。
本发明的具有温度补偿功能的AMOLED显示面板及显示装置通过具有温度检测功能的第一像素驱动电路的设置，实现了对AMOLED显示面板的面板温度的实时检测以及实时调整，且第一像素驱动电路的结构简单；有效的解决了现有的AMOLED显示面板及显示装置中有机发光二极管的使用寿命较短的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
Claims (19)
- 一种具有温度补偿功能的AMOLED显示面板，其包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整；所述第一像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及有机发光二极管，所述有机发光二极管的负极与接地；所述第二像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
- 一种具有温度补偿功能的AMOLED显示面板，其包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整。
- 根据权利要求2所述的具有温度补偿功能的AMOLED显示面板，其中所述第一像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及有机发光二极管，所述有机发光二极管的负极与接地。
- 根据权利要求2所述的具有温度补偿功能的AMOLED显示面板，其中所述第二像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
- 根据权利要求2所述的具有温度补偿功能的AMOLED显示面板，其中所述预设位置为所述AMOLED显示面板的中心位置或所述AMOLED显示面板的温度采样位置。
- 根据权利要求3所述的具有温度补偿功能的AMOLED显示面板，其中所述AMOLED显示面板的预设位置的像素单元的每一帧画面均包括依次执行的像素驱动阶段、驱动保持阶段以及温度检测阶段。
- 根据权利要求6所述的具有温度补偿功能的AMOLED显示面板，其中当所述像素单元处于像素驱动阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管、所述第三薄膜晶体管以及所述第四薄膜晶体管均导通；且对应的数据线输入数据信号，所述检测信号线输出数据补偿信号；当所述像素单元处于驱动保持阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体均断开，所述第四薄膜晶体管导通，以通过所述存储电容维持所述有机发光二极管的发光强度。
- 根据权利要求6所述的具有温度补偿功能的AMOLED显示面板，其中当所述像素单元处于温度检测阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体管均导通，所述第四薄膜晶体管断开，所述有机发光二极管停止发光，且对应的数据线输入预设灰阶信号，所述检测信号线输出温度检测信号。
- 根据权利要求8所述的具有温度补偿功能的AMOLED显示面板，其中所述温度调节单元根据温度检测信号对数据信号进行调整的步骤包括：获取所有预设位置的像素单元对应的温度检测信号，并基于所述温度检测信号计算对应所述第二薄膜晶体管的检测电流；计算所有预设位置的像素单元对应的检测电流的平均电流值；以及根据所述平均电流值与预设阈值电流，对所述数据信号进行调整，以使得调整后的检测电流的平均电流值小于等于所述预设阈值电流。
- 根据权利要求9所述的具有温度补偿功能的AMOLED显示面板，其中所述对数据信号进行调整包括对数据信号的灰阶值进行调整或对数据信号的Gamma值进行调整。
- 一种AMOLED显示装置，其包括具有温度补偿功能的AMOLED显示面板，所述AMOLED显示面板包括数据线、扫描线、由所述数据线和所述扫描线交错形成的多个像素单元、以及用于调节所述AMOLED显示面板的面板温度的温度调节单元；其中预设位置的像素单元对应设置有具有像素驱动功能和温度检测功能的第一像素驱动电路，其他位置的像素单元对应设置有具有像素驱动功能的第二像素驱动电路；所述温度调节单元的输入端与所述第一像素驱动电路连接，以接收所述像素单元对应的温度检测信号；所述温度调节单元的输出端与所述数据线连接，以根据所述温度检测信号对数据信号进行调整。
- 根据权利要求11所述的AMOLED显示装置，其中所述第一像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；第四薄膜晶体管，所述第四薄膜晶体管的栅极与温度调节单元连接，所述第四薄膜晶体管的源极与所述第三薄膜晶体管的漏极连接，所述第四薄膜晶体管的漏极与有机发光二极管的正极连接；以及有机发光二极管，所述有机发光二极管的负极与接地。
- 根据权利要求11所述的具有温度补偿功能的AMOLED显示面板，其中所述第二像素驱动电路包括：第一薄膜晶体管，所述第一薄膜晶体管的栅极与相应的扫描线连接，所述第一薄膜晶体管的源极与相应的数据线连接，所述第一薄膜晶体管的漏极与第二薄膜晶体管的栅极连接；第二薄膜晶体管，所述第二薄膜晶体管的源极与驱动电压源连接，所述第二薄膜晶体管的漏极与第三薄膜晶体管的漏极连接；第三薄膜晶体管，所述第三薄膜晶体管的源极与相应的检测信号线连接，所述第三薄膜晶体管的栅极与检测控制信号线连接；存储电容，所述存储电容的一端与所述第二薄膜晶体管的栅极连接，所述存储电容的另一端与所述第三薄膜晶体管的漏极连接；以及有机发光二极管，所述有机发光二极管的正极与所述第三薄膜晶体管的漏极连接，所述有机发光二极管的负极接地。
- 根据权利要求11所述的具有温度补偿功能的AMOLED显示面板，其中所述预设位置为所述AMOLED显示面板的中心位置或所述AMOLED显示面板的温度采样位置。
- 根据权利要求12所述的具有温度补偿功能的AMOLED显示面板，其中所述AMOLED显示面板的预设位置的像素单元的每一帧画面均包括依次执行的像素驱动阶段、驱动保持阶段以及温度检测阶段。
- 根据权利要求15所述的具有温度补偿功能的AMOLED显示面板，其中当所述像素单元处于像素驱动阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管、所述第三薄膜晶体管以及所述第四薄膜晶体管均导通；且对应的数据线输入数据信号，所述检测信号线输出数据补偿信号；当所述像素单元处于驱动保持阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体均断开，所述第四薄膜晶体管导通，以通过所述存储电容维持所述有机发光二极管的发光强度。
- 根据权利要求15所述的具有温度补偿功能的AMOLED显示面板，其中当所述像素单元处于温度检测阶段时，所述第一薄膜晶体管、所述第二薄膜晶体管以及所述第三薄膜晶体管均导通，所述第四薄膜晶体管断开，所述有机发光二极管停止发光，且对应的数据线输入预设灰阶信号，所述检测信号线输出温度检测信号。
- 根据权利要求17所述的具有温度补偿功能的AMOLED显示面板，其中所述温度调节单元根据温度检测信号对数据信号进行调整的步骤包括：获取所有预设位置的像素单元对应的温度检测信号，并基于所述温度检测信号计算对应所述第二薄膜晶体管的检测电流；计算所有预设位置的像素单元对应的检测电流的平均电流值；以及根据所述平均电流值与预设阈值电流，对所述数据信号进行调整，以使得调整后的检测电流的平均电流值小于等于所述预设阈值电流。
- 根据权利要求18所述的具有温度补偿功能的AMOLED显示面板，其中所述对数据信号进行调整包括对数据信号的灰阶值进行调整或对数据信号的Gamma值进行调整。
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| CN110097859B (zh) * | 2019-04-10 | 2020-10-13 | 武汉华星光电半导体显示技术有限公司 | 一种显示面板及显示装置 |
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