WO2017000407A1 - 一种检测电路、检测方法和像素驱动电路 - Google Patents
一种检测电路、检测方法和像素驱动电路 Download PDFInfo
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- WO2017000407A1 WO2017000407A1 PCT/CN2015/091183 CN2015091183W WO2017000407A1 WO 2017000407 A1 WO2017000407 A1 WO 2017000407A1 CN 2015091183 W CN2015091183 W CN 2015091183W WO 2017000407 A1 WO2017000407 A1 WO 2017000407A1
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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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
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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
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
Definitions
- the present invention relates to the field of display technologies, and in particular, to a detection circuit, a detection method, and a pixel driving circuit.
- the OLED display device may include a plurality of pixels and a pixel driving circuit for driving the pixels, wherein each of the pixels includes an OLED, and the pixel driving circuit may include a Thin Film Transistor (TFT) and a capacitor.
- TFT Thin Film Transistor
- the OLED display device since the specific factors such as the threshold voltage Vth, the mobility, the parasitic capacitance, and the channel width/length of the TFT corresponding to each pixel are different, the OLED display device may cause uneven brightness during display. .
- data compensation can be performed on the OLED display device by using a data compensation method, for example, data compensation is performed on the TFT in the OLED display device by an external compensation circuit. Before the data is compensated for the TFT, it is necessary to detect the characteristic parameters of the TFT in the OLED display device.
- Embodiments of the present invention provide a detection circuit, a detection method, and a pixel driving circuit for detecting characteristic parameters of a driving module and detecting characteristic parameters of the light emitting device.
- a detection circuit includes: a first detection module, a second detection module, a load module, a light emitting device, and a driving module, wherein the first detecting module is connected to the driving module and the load module, The second detection module is connected to the light emitting device and the load module.
- the first detecting module includes: a first switching tube, a second switching tube, a third switching tube, and a storage capacitor
- the driving module includes a driving tube
- the control pole of the first switch tube is connected to the first control line, the first pole of the first switch tube is connected to the data line and the load module, and the second pole of the first switch tube is connected to the third switch tube a second pole and a first end of the storage capacitor;
- the control pole of the second switch tube is connected to the second control line, the first pole of the second switch tube is connected to the reference power source, and the second pole of the second switch tube is connected to the control pole and the storage tube of the drive tube a second end of the capacitor;
- the control pole of the third switch tube is connected to a third control line, the first pole of the third switch tube is connected to the first power source, and the second pole of the third switch tube is connected to the first pole of the drive tube And a first end of the storage capacitor;
- a control electrode of the drive tube is coupled to a second end of the storage capacitor, and a second pole of the drive tube is coupled to the first electrode of the light emitting device.
- the second detecting module includes a fourth switching tube, the control pole of the fourth switching tube is connected to the fourth control line, and the first pole of the fourth switching tube is connected to the data line and the load module The first end of the fourth switch tube is connected to the first electrode of the light emitting device.
- the second electrode of the light emitting device is connected to a second power source.
- the load module includes a load capacitance.
- the characteristic parameter of the driving module includes at least one of a threshold voltage and an electron mobility
- the characteristic parameters of the load module include at least one of a threshold voltage and an electron mobility.
- the data line provides a pre-charging voltage to the load module; in the first detecting phase, the load module discharges through the first detecting module and the driving module to detect a characteristic parameter of the driving module; In the second detection phase, the load module discharges through the second detecting module and the light emitting device to detect characteristic parameters of the light emitting device.
- a pixel driving circuit including the above detecting circuit and a pixel compensation circuit is provided;
- the pixel compensation circuit is configured to compensate the driving module according to a characteristic parameter of the driving module and compensate the light emitting device according to the characteristic parameter of the light emitting device.
- a detection method is provided, the method being applied to a detection circuit according to an embodiment of the present invention, the detection circuit comprising: a first detection module, a second detection module, and a load a module, a light emitting device and a driving module, the first detecting module is connected to the driving module and the load module, and the second detecting module is connected to the light emitting device and the load module;
- the detection method includes:
- the data line provides a pre-charge voltage to the load module
- the load module discharges through the first detecting module and the driving module to detect characteristic parameters of the driving module;
- the load module discharges through the second detection module and the light emitting device to detect characteristic parameters of the light emitting device.
- the second detecting module includes a fourth switching tube, the control pole of the fourth switching tube is connected to the fourth control line, and the first pole of the fourth switching tube is connected to the data line and the load module a first end, the second pole of the fourth switch tube is connected to the first electrode of the light emitting device;
- the discharging of the load module by the second detecting module and the light emitting device includes:
- the fourth switch tube is turned on, and the load module discharges through the fourth switch tube and the light emitting device.
- the load module includes a load capacitance.
- the drive module comprises a drive tube.
- the first detecting module is connected to the driving module and the load module
- the second detecting module is connected to the light emitting device and the load module, so that the characteristic parameters of the driving module can be detected and the light is detected The characteristic parameters of the device.
- FIG. 1 is a schematic structural diagram of a detecting circuit according to a first embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a detecting circuit according to Embodiment 2 of the present invention.
- FIG 3 is an equivalent circuit diagram of the detection circuit in the precharge phase in the second embodiment
- FIG. 5 is an equivalent circuit diagram of the detection circuit in the second detection stage in the second embodiment.
- FIG. 1 is a schematic structural diagram of a detecting circuit according to a first embodiment of the present invention.
- the detecting circuit may include: a first detecting module 11 , a second detecting module 12 , a load module 13 , a light emitting device 14 and a driving module 15 , wherein the first detecting module 11 is connected to the driving module 15 and the load module 13.
- the second detection module 12 is connected to the light emitting device 14 and the load module 13.
- the data line DL provides a pre-charging voltage to the load module 13; in the first detecting phase, the load module 13 discharges through the first detecting module 11 and the driving module 15 to detect the characteristic parameter of the driving module 15; In the second detection phase, the load module 13 discharges through the second detection module 12 and the light emitting device 14 to detect characteristic parameters of the light emitting device 14.
- the characteristic parameter of the driving module 15 may include at least one of a threshold voltage, an electron mobility, and the like.
- the load module 13 discharges through the first detecting module 11, the driving module 15, and the light emitting device 14 so that the external detecting circuit detects the characteristic parameters of the driving module 15.
- the characteristic parameter of the load module 13 may include at least one of a threshold voltage, an electron mobility, and the like.
- the load module 13 discharges through the second detecting module 12 and the light emitting device 14 so that the external detecting circuit detects the characteristic parameters of the light emitting device 14.
- the first detecting module is connected to the driving module and the load module
- the second detecting module is connected to the light emitting device and the load module
- the driving module and the light emitting device are connected, so that the characteristic parameters of the driving module can be detected.
- the data line is used as the detection line, and the functions of the data line and the detection line are combined, and the detection line is not required to be separately provided, thereby reducing circuit complexity and manufacturing cost.
- the detecting circuit may include: a first detecting module 11, a second detecting module 12, a load module 13, a light emitting device 14, and The driving module 15, the first detecting module 11 is connected to the driving module 15 and the load module 13, and the second detecting module 12 is connected to the light emitting device 14 and the load module 13.
- the data line DL provides a pre-charging voltage to the load module 13; in the first detecting phase, the load module 13 discharges through the first detecting module 11 and the driving module 15 to detect the characteristic parameters of the driving module 15; In the second detection phase, the load module 13 discharges through the second detection module 12 and the light emitting device 14 to detect the characteristic parameters of the light emitting device 14.
- the driving module 15 is also connected to the light emitting device 14.
- the characteristic parameter of the driving module 15 may include at least one of a threshold voltage, an electron mobility, and the like.
- the driving module 15 discharges through the first detecting module 11, the driving module 15, and the light emitting device 14 so that the external detecting circuit detects the characteristic parameters of the driving module 15.
- the characteristic parameter of the load module 13 may include at least one of a threshold voltage, an electron mobility, and the like.
- the load module 13 discharges through the second detecting module 12 and the light emitting device 14 so that the external detecting circuit detects the characteristic parameters of the light emitting device 14.
- the first detecting module 11 may include: a first switch tube T1, a second switch tube T2, a third switch tube T3, and a storage capacitor Cst, and the drive module 15 may include a drive tube. DrT.
- the control pole of the first switch T1 is connected to the first control line G1, the first pole of the first switch T1 is connected to the data line DL and the load module 13, and the second pole of the first switch T1 is connected to the third switch a second pole of T3 and a first end of the storage capacitor Cst; a control pole of the second switch transistor T2 is connected to the second control line G2, a first pole of the second switch transistor T2 is connected to the reference power source Ref, and the second switch transistor T2
- the second pole is connected to the control pole of the driving tube DrT and the second end of the storage capacitor Cst;
- the control pole of the third switching transistor T3 is connected to the third control line G3, and the first pole of the third switching transistor T3 is connected to the first The power supply Vdd
- the second pole of the third switch T3 is connected to the first pole of the drive tube DrT and the first end of the storage capacitor Cst; the control pole of the drive tube DrT is connected to the second end of the storage capacitor Cst,
- the second detecting module 12 includes a fourth switching tube T4, the control pole of the fourth switching tube T4 is connected to the fourth control line G4, and the first pole of the fourth switching tube T4 is connected to the data line DL and the load module.
- the first end of the third switch tube T4 is connected to the first electrode of the light emitting device 14.
- the fourth switching transistor T4 is turned off; in the first detecting phase, the fourth switching transistor T4 is turned off; in the second detecting phase, the fourth switching transistor T4 is turned on, and the load module 13 passes through the fourth switching transistor T4.
- the light emitting device 14 is discharged to detect characteristic parameters of the light emitting device 14.
- the second electrode of the light emitting device 14 is connected to the second power source Vss.
- the first electrode is an anode and the second electrode is a cathode.
- the second end of the load module 13 is grounded or connected to a voltage power line, which is a stable voltage power line.
- the load module 13 includes a load capacitance Cload.
- the light emitting device 14 includes an OLED; the first switch tube T1, the first switch tube T2, the third switch tube T3, the fourth switch tube T4, and the drive tube DrT are all TFTs.
- the drive tube DrT is a P-type TFT.
- FIG. 3 is an equivalent circuit diagram of the detection circuit in the pre-charging phase in the second embodiment.
- the first control line G1 outputs a first control signal to the first switching transistor T1 to make the first switching transistor.
- T1 is turned off, at which time the first control signal is low level;
- the second control line G2 outputs a second control signal to the second switching transistor T2 to turn off the second switching transistor T2, and the second control signal is low.
- the third control line G3 outputs a third control signal to the third switch tube T3 to turn off the third switch tube T3, and the third control signal is at a low level;
- the fourth control line G4 is turned to the fourth switch tube T4.
- the fourth control signal is output to turn off the fourth switching transistor T4, and the fourth control signal is at a low level.
- the data line DL supplies a precharge voltage Vpre to the load capacitor Cload to charge the load capacitor Cload. Then, the load capacitor Cload can maintain the precharge voltage Vpre on the data line DL.
- the first control line G1 outputs a first control signal to the first switching transistor T1 to enable the first control signal.
- a switch tube T1 is turned on, at which time the first control signal is at a high level;
- the second control line G2 outputs a second control signal to the second switch tube T2 to turn on the second switch tube T2, and the second control signal at this time Is a high level;
- the third control line G3 outputs a third control signal to the third switching tube T3 to turn off the third switching tube T3, at which time the third control signal is low level;
- the fourth control line G4 is fourth The switch tube T4 outputs a fourth control signal to turn off the fourth switch tube T4, and the fourth control signal is at a low level.
- the data line DL supplies a precharge voltage Vpre to the first end of the storage capacitor Cst to charge the storage capacitor Cst.
- the voltage of the first end of the storage capacitor Cst is Vpre;
- the second switch When the tube T2 is turned on, the reference power supply Ref supplies the reference voltage Vref to the second end of the storage capacitor Cst to charge the storage capacitor Cst.
- the voltage of the second end of the storage capacitor Cst is Vref. Since the voltage difference Vpre-Vref across the storage capacitor Cst is larger than the threshold voltage Vth of the drive tube DrT, the drive tube DrT is driven.
- the load capacitance Cload is discharged through the first switch tube T1, the drive tube DrT, and the OLED until the voltage difference across the storage capacitor Cst is equal to the threshold voltage Vth of the drive tube DrT to detect the characteristic parameter of the drive tube DrT.
- the external detecting circuit measures the sensing voltage V1 on the data line DL, and the sensing voltage V1 is the voltage at the first end of the Cst due to The voltage at the second end of Cst is the reference voltage Vref, so the outside
- the detecting circuit calculates that the threshold voltage of the driving tube DrT is V1 - Vref; and the external detecting circuit can calculate other characteristic parameters of the driving tube DrT according to the sensing voltage V1, for example, electron mobility.
- the first control line G1 outputs a first control signal to the first switch tube T1 to enable the first control signal.
- a switch tube T1 is turned off, at which time the first control signal is at a low level;
- the second control line G2 outputs a second control signal to the second switch tube T2 to turn off the second switch tube T2, and the second control signal at this time Is a low level;
- the third control line G3 outputs a third control signal to the third switch tube T3 to turn off the third switch tube T3, the third control signal is at a low level;
- the fourth control line G4 is fourth The switch tube T4 outputs a fourth control signal to turn on the fourth switch tube T4, and the fourth control signal is at a high level.
- the load capacitor Cload is discharged through the fourth switch tube T4 and the OLED to detect the characteristic parameter of the OLED.
- the external detecting circuit measures the sensing voltage or the sensing current on the data line DL, and calculates the OLED according to the sensing voltage or the sensing current. Characteristic parameters. Then, uniformity can be evaluated by analyzing the difference in characteristic parameters of OLEDs of different pixels.
- the load module in the first detecting phase, discharges through the first detecting module and the driving module to detect the characteristic parameter of the driving module, and in the second detecting phase, the load module performs the second detecting module and the light emitting device.
- the discharge is performed to detect characteristic parameters of the light emitting device, so that the embodiment can detect both the characteristic parameters of the driving module and the characteristic parameters of the light emitting device.
- the data line is used as the detection line, and the functions of the data line and the detection line are combined, and the detection line is not required to be separately provided, thereby reducing circuit complexity and manufacturing cost.
- Embodiment 3 of the present invention provides a pixel driving circuit including a detecting circuit and a pixel compensation circuit.
- the detecting circuit can adopt the detecting circuit provided in the first embodiment, and is not described in detail herein.
- the pixel compensation circuit is configured to compensate the driving module according to the characteristic parameter of the driving module and compensate the light emitting device according to the characteristic parameter of the light emitting device.
- the first detecting module is connected to the driving module and the load module
- the second detecting module is connected to the light emitting device and the load module, so that the embodiment can detect the characteristic parameters of the driving module and can The characteristic parameters of the light emitting device are detected.
- the data line is used as the detection line, and the functions of the data line and the detection line are combined, and the detection line is not required to be separately provided, thereby reducing circuit complexity and manufacturing cost.
- a fourth embodiment of the present invention provides a detection method for detecting a circuit.
- the detection circuit includes: a first detection module, a second detection module, a load module, a light emitting device, and a driving module.
- the first detecting module is connected to the driving module and the load.
- a module, the second detection module is connected to the light emitting device and the load module;
- the detection method can include:
- Step 101 In a pre-charging phase, the data line provides a pre-charge voltage to the load module;
- Step 102 In the first detecting phase, the load module discharges through the first detecting module and the driving module to detect a characteristic parameter of the driving module.
- Step 103 In the second detection phase, the load module discharges through the second detecting module and the light emitting device to detect characteristic parameters of the light emitting device.
- the second detecting module includes a fourth switching tube, the control pole of the fourth switching tube is connected to the fourth control line, and the first pole of the fourth switching tube is connected to the first end of the data line and the load module, A second pole of the four switch transistor is coupled to the first electrode of the light emitting device.
- Step 103 includes:
- the fourth switch tube is turned on, and the load module discharges through the fourth switch tube and the light emitting device.
- the load module includes a load capacitor; the drive module includes a drive tube.
- the detection method provided in this embodiment may be implemented by using the detection circuit provided in the first embodiment or the second embodiment.
- the detection circuit provided in the first embodiment or the second embodiment.
- the load module in the first detecting phase, discharges through the first detecting module and the driving module to detect the characteristic parameter of the driving module, and in the second detecting phase, the load module passes the second detecting module and the light emitting device. Discharge is performed to detect characteristic parameters of the light emitting device, so that the present embodiment can detect both the characteristic parameters of the driving module and the characteristic parameters of the light emitting device.
- the data line is used as the detection line, and the functions of the data line and the detection line are combined, and the detection line is not required to be separately provided, thereby reducing circuit complexity and manufacturing cost.
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Abstract
Description
Claims (12)
- 一种检测电路,包括:第一检测模块;第二检测模块;负载模块;发光器件;和驱动模块;其中,第一检测模块连接到驱动模块以及所述负载模块,第二检测模块连接到发光器件以及所述负载模块。
- 根据权利要求1所述的检测电路,其特征在于,所述第一检测模块包括:第一开关管、第二开关管、第三开关管和存储电容,所述驱动模块包括驱动管;其中,所述第一开关管的控制极连接至第一控制线,所述第一开关管的第一极连接至数据线和负载模块,所述第一开关管的第二极连接至第三开关管的第二极和存储电容的第一端;所述第二开关管的控制极连接至第二控制线,所述第二开关管的第一极连接至基准电源,所述第二开关管的第二极连接至驱动管的控制极和存储电容的第二端;所述第三开关管的控制极连接至第三控制线,所述第三开关管的第一极连接至第一电源,所述第三开关管的第二极连接至驱动管的第一极和存储电容的第一端;所述驱动管的控制极连接至存储电容的第二端,所述驱动管的第二极连接至发光器件的第一电极。
- 根据权利要求1所述的检测电路,其特征在于,所述第二检测模块包括第四开关管,所述第四开关管的控制极连接至第四控制线,所述第四开关管的第一极连接至数据线和负载模块的第一端,所述第四开关管的第二极连接至发光器件的第一电极。
- 根据权利要求2或3所述的检测电路,其特征在于,所述发光器件的第二 电极连接至第二电源。
- 根据权利要求1所述的检测电路,其特征在于,所述负载模块包括负载电容。
- 根据权利要求1所述的检测电路,其特征在于,所述驱动模块的特性参数包括阈值电压和电子迁移率中的至少一个;所述负载模块的特性参数包括阈值电压和电子迁移率中的至少一个。
- 根据权利要求1所述的检测电路,其特征在于,在预充电阶段,数据线向负载模块提供预充电电压;在第一检测阶段,所述负载模块通过第一检测模块和驱动模块进行放电,以检测驱动模块的特性参数;在第二检测阶段,所述负载模块通过所述第二检测模块和发光器件进行放电,以检测发光器件的特性参数。
- 一种像素驱动电路,包括像素补偿电路和根据权利要求1至6任一所述的检测电路;所述像素补偿电路用于根据所述驱动模块的特性参数对所述驱动模块进行补偿以及根据所述发光器件的特性参数对发光器件进行补偿。
- 一种检测方法,所述检测方法用于根据权利要求1所述的检测电路,所述检测方法包括:在预充电阶段,数据线向负载模块提供预充电电压;在第一检测阶段,负载模块通过第一检测模块和驱动模块进行放电,以检测驱动模块的特性参数;在第二检测阶段,负载模块通过第二检测模块和发光器件进行放电,以检测发光器件的特性参数。
- 根据权利要求9所述的检测方法,其特征在于,所述第二检测模块包括第四开关管,所述第四开关管的控制极连接至第四控制线,所述第四开关管的第一极 连接至数据线和负载模块的第一端,所述第四开关管的第二极连接至发光器件的第一电极;所述负载模块通过第二检测模块和发光器件进行放电包括:所述第四开关管导通,负载模块通过第四开关管和发光器件进行放电。
- 根据权利要求9或10所述的检测方法,其特征在于,所述负载模块包括负载电容。
- 根据权利要求9或10所述的检测方法,其特征在于,所述驱动模块包括驱动管。
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US11461259B2 (en) * | 2019-10-22 | 2022-10-04 | Skyworks Solutions, Inc. | Systems and methods for load detection on serial communication data lines |
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