WO2014205950A1 - 有源矩阵有机发光二极管像素单元电路以及显示面板 - Google Patents

有源矩阵有机发光二极管像素单元电路以及显示面板 Download PDF

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Publication number
WO2014205950A1
WO2014205950A1 PCT/CN2013/084919 CN2013084919W WO2014205950A1 WO 2014205950 A1 WO2014205950 A1 WO 2014205950A1 CN 2013084919 W CN2013084919 W CN 2013084919W WO 2014205950 A1 WO2014205950 A1 WO 2014205950A1
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Prior art keywords
module
transistor
circuit
pixel unit
light
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/084919
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English (en)
French (fr)
Inventor
谭文
祁小敬
吴博
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Application filed by BOE Technology Group Co Ltd, Chengdu BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US14/235,319 priority Critical patent/US9530354B2/en
Publication of WO2014205950A1 publication Critical patent/WO2014205950A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • 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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • 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
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0262—The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
    • 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
    • G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
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    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to an active matrix organic light emitting diode pixel unit circuit, and a display panel.
  • the touch screen is integrated in the liquid crystal cell.
  • the TSP in Cell technology is a TSP (T uch Screen Panel) sensor sensor and its driving circuit, which is fabricated on the Array substrate by an array Array process. Integrating the TSP Sensor inside the LCD panel LCD (Liquid Crystal Display) panel allows the product to be thinner and lighter, with more functions and improved touch screen reliability.
  • Fig. 1(a) and Fig. 1(b) show the basic light-sensing TSP in Cell circuit in the prior art.
  • the sensor uses photodiode D1 to sense illumination and generate leakage to detect the touch signal.
  • the Sensor uses the sensing capacitor C2 to sense illumination, relying on capacitive coupling and capacitance changes to detect the etch signal.
  • TFT (Thin-Film Transistor) T1 is used as an amplifying transistor to amplify the voltage change after D1 detects the touch signal, and enhances the output driving capability of the TSP m Cell circuit for the external TSP readout circuit to correctly read the detection result.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • FIG. 2 is an embodiment of the pixel unit circuit of the AMOLED.
  • Embodiments of the present invention provide an active matrix organic light emitting diode pixel unit circuit, and a display panel for integrating a touch screen circuit into an AMOLED pixel unit circuit, and an AMOLED display panel having a touch screen function.
  • An active matrix OLED AMOLED pixel unit circuit includes an illuminating module, a driving module, a charging module, a threshold compensation module, a illuminating control module, a touch sensing module, and a sensing signal output module.
  • a driving module configured to amplify the sensing signal generated by the touch sensing module, output the module through the sensing signal, and drive the lighting module;
  • An illumination control module configured to control illumination of the illumination module
  • a threshold compensation module configured to perform threshold voltage compensation on the driving module
  • a charging module configured to charge the threshold compensation module
  • a touch sensing module configured to generate an inductive signal and output the same to the driving module
  • the sensing signal output module is configured to output the amplified signal after being driven by the driving module.
  • a display panel provided by an embodiment of the present invention includes the AMOLED pixel unit circuit. According to the above technical solution, in the present invention, fewer circuit components are added to the existing AMOLED pixel unit circuit, and the common data lines, circuit components, and control signals are realized.
  • the TSP in Cell circuit is integrated in the AMOLED pixel unit circuit.
  • FIG. 1(a) and 1(b) are schematic diagrams of a touch screen circuit in the prior art
  • FIG. 2 is a schematic diagram of a circuit of an AMOLED pixel unit in the prior art
  • FIG. 3 is a circuit diagram of an AMOLED pixel unit according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an AMOLED pixel unit circuit according to another embodiment of the present invention
  • FIG. 6 is a timing diagram of a control signal of an AMOLED pixel unit circuit according to an embodiment of the present invention
  • Embodiments of the present invention provide an active matrix organic light emitting diode pixel unit circuit, and
  • the display panel is configured to integrate the touch screen circuit into the AMOLED pixel unit circuit, and to manufacture an AMOLED display panel with a touch screen function.
  • an active matrix organic light emitting diode (AMOLED) pixel unit circuit includes an illumination module 13 , a driving module 11 , a charging module 15 , a threshold compensation module 14 , an illumination control module 12 , and a touch sensing module 16 . And the sensing signal output module 17; wherein, the driving module 11 is configured to amplify the sensing signal generated by the touch sensing module 16 and output the module through the sensing signal, and drive the light emitting module 13;
  • the illumination control module 12 is configured to control the illumination of the illumination module 13;
  • the threshold compensation module 14 is configured to perform threshold voltage compensation on the driving module 1 !
  • the touch sensing module 16 is configured to generate an inductive signal and output the same to the driving module 11;
  • the sensing signal output module 17 is used to drive the module! 1 amplified signal output.
  • the driving module 11 includes a first transistor T1 whose gate is connected to the threshold compensation module 14, specifically, as shown in FIG. 3, connected by a ⁇ 3 node, and the other two poles respectively and the illuminating control module 12
  • the first node P1 is connected to the second node ⁇ 2.
  • the illumination control module! 2 includes a second transistor ⁇ 2 and a fifth transistor ⁇ 5, wherein the gate of the second transistor ⁇ 2 and the second signal control line of the AMOLED pixel unit circuit of the current stage (corresponding to the second control signal CR2...n of the current level AMOLED pixel unit circuit) Connected, the other two poles are respectively connected with the power line (corresponding to the power control signal POWER) and the first node P1; the gate of the fifth transistor T5 is connected with the second signal control line of the AMOLED pixel unit circuit of the current level, and the other two poles respectively The second node P2 is connected to a low voltage level VSS signal line.
  • the light emitting module 13 includes a first light emitting diode D1 having one end connected to the second node P2 and the other end connected to a low voltage level signal line (corresponding to a low voltage level signal VSS).
  • a first light emitting diode D1 having one end connected to the second node P2 and the other end connected to a low voltage level signal line (corresponding to a low voltage level signal VSS).
  • the threshold compensation module 14 includes a fourth transistor T4, a first capacitor C1, and a second capacitor C2;
  • the gate of the fourth transistor ⁇ 4 is connected to the first signal control line of the AMOLED pixel unit circuit of the current level (corresponding to the first control signal CR1ja of the current level of the AMOLED pixel unit circuit), and the other two poles are respectively associated with the first node Pi and a gate of the first transistor Ti is connected; the first capacitor C1 is connected between a gate of the first transistor T1 and the second node ⁇ 2, the second The capacitor C2 is connected to the charging module! 5 and between the gates of the first transistor T1.
  • the charging module 15 includes a third transistor T3 whose gate is connected to a third signal control line (corresponding to the fourth control signal CR3...n) of the AMOLED pixel unit circuit of the current stage, and the other two poles respectively
  • the data line (corresponding to the data signal DATA.. OLED & TSP) is connected to the second capacitor C2 in the threshold compensation module 14.
  • the touch sensing module 16 includes a seventh transistor T7 and a second LED D2.
  • the gate of the seventh transistor T7 and the third signal control line of the upper AMOLED pixel unit circuit (corresponding to the previous one)
  • the third AMOLED pixel unit circuit has a third control signal CR3....n-1) connected, and the other two electrodes are respectively connected to the second LED D2 and the gate of the first transistor T1; the second LED D2 One end is connected to the seventh transistor T7, and the other end is connected to the low voltage level signal line; or
  • FIG. 4 is a schematic diagram of a circuit of an AMOLED pixel unit according to another embodiment of the present invention.
  • the touch sensing module includes a seventh transistor T7 and a sensing capacitor C3.
  • the gate of the seventh transistor T7 is connected to the previous one.
  • the third AM control circuit is connected to the third signal control line, and the other two electrodes are respectively connected to the sensing capacitor C3 and the gate of the first transistor T1.
  • One end of the sensing capacitor C3 is connected to the seventh transistor T7, and the other end needs to be in contact with the outside world such as a human body, and the voltage of the first capacitor C1 is changed by the sensing capacitance coupling and the capacitance change.
  • the sensing signal output module 17 includes a sixth transistor T6 whose gate is connected to a third signal control line of the upper-level AMOLED pixel unit circuit, and the other two poles respectively correspond to the data line and the The first node P! is connected.
  • the anode of the second light emitting diode D2 is connected to the low voltage level signal line, and the cathode is connected to the seventh transistor T7.
  • the anode of the first light emitting diode D1 is connected to the second node P2, and the cathode is connected to a low voltage level signal line.
  • the first transistor T1, the second transistor ⁇ 2, the third transistor ⁇ 3, the fourth transistor ⁇ 4, the sixth transistor ⁇ 6, and the seventh transistor ⁇ 7 are all ⁇ -type thin film transistors TFT, and the fifth transistor T5 is a P-type TFT.
  • the first transistor ⁇ is amplified and outputted.
  • the sixth transistor T6 is turned on, and the current output by the first transistor T1 is transmitted to the data line, and the data is transmitted.
  • the line reads the signal produced by the touch.
  • the sensing element D2 or C3 can generate an induced signal and input the first transistor TI.
  • the touch sensing module 16 also shares a capacitor as a storage capacitor, and a common power line that alternately inputs the required level of operation of the TSP in cell circuit and the AMOLED circuit.
  • the low voltage level signal VSS described in the embodiment of the present invention is a cutoff level whose level value remains unchanged.
  • the structure shown in FIG. 4 and the structure shown in FIG. 3 include that when the sensing element is a sensing capacitor, one end of the sensing capacitor is connected to the seventh transistor, and the other end needs to be in contact with the outside world, such as a human body, and depends on the capacitive coupling and the capacitor. Change to change the first capacitor voltage, the other part of the connection relationship is no different.
  • the timing relationship of the working signals in the embodiment of the present invention is as shown in FIG. 5.
  • the circuit provided by the embodiment of the present invention includes six working phases: an initial Init phase, a sensing Photo phase, a read Read phase, a charging Charge phase, and a write. Write phase, organic light emitting diode OLED stage.
  • VDATA in Figure 5 is the grayscale voltage of the data line DATA...OLED&TSP, which ranges from [VDL, VDH], and the D1 brightness is different under different grayscale voltages. The respective stages are described below.
  • the magnitude relationship of the values of the respective signals shown in FIG. 5 is as shown in FIG. 6.
  • the level of the display is displayed in the vertical direction. The higher the height, the larger the level is. On the contrary, the lower the height, the higher the level. small. It can be seen from Figure 6 that VSS ⁇ VDL ⁇ VDI-KVINKVDD, the values of these levels are all preset, and the specific values can be set according to actual needs.
  • T7 is turned on, and the photodiode D2 of the TSP Sensor is connected as the gate of T1 of the amplifying TFT, and C1 is a storage capacitor for amplifying the TFT T1.
  • T2 and T4 are turned on, the POWER level is VINI, and the TSP is initialized.
  • the storage capacitor C1 connected to the gate of T1 is precharged to the initialization level VINI to ensure that the later stage T! operates in the saturation amplification state.
  • Photo stage T2, ⁇ 4 cutoff, ⁇ 7 turn on.
  • the photodiode D2 detects the touch state of the panel panel.
  • the external light source cannot be irradiated to the photodiode D2, then D2 receives less light, and the light-induced leakage current is small.
  • the level change of the C1 voltage in the Bay Photo stage due to leakage is small; when the Panel is not etched by the finger Touch, the external light source can illuminate the photodiode D2, then D2 is exposed to light, which produces a large photo-induced leakage current.
  • the voltage of C 1 in the U Photo phase is greatly changed due to leakage. Therefore, if touched, the gate voltage of T 1 is small with respect to the initial voltage change; if not touched, the gate voltage of T 1 is changed with respect to the initial voltage.
  • READ phase The level result of the Photo phase is stored on C1. At this time, T6 is turned on, T3 and ⁇ 4 are turned off, DATA....OLED&TSP is used as the readout line of the TSP output result, and T1 amplifies and outputs its gate voltage to the readout line via the first nodes P1 and ⁇ 6. , output to the peripheral TSP read circuit.
  • the above three stages work for the TSP in Cell, which can sense external eclipse and output an inductive signal. After the TSP in Cell phase of operation, the circuit enters the AMOLED circuit stage of operation.
  • POWER is a voltage slightly lower than VDD T2., ⁇ 4 is on, C 1 voltage is IM; then, POWER is VDD, T2, ⁇ 4 is cut off, B!JCI is discharged to voltage Ti Threshold voltage TH .
  • T3 is turned on.
  • the data line is input with the grayscale voltage DAIA in the previous Charge phase, and then input ⁇ 3 ⁇ 4 ⁇ in the Wnte phase ; so the CI voltage, that is, the T 1 gate voltage becomes
  • OLED stage T2 is turned on, T3, T5 T1 works, D 1 emits light.
  • the current output of T 1 is: Where k is a preset constant and PD AIA ranges from VDL to VDH.
  • the embodiment of the invention further provides a display panel comprising the above AMOLED pixel unit circuit.
  • a display panel comprising the above AMOLED pixel unit circuit.

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Abstract

一种有源矩阵有机发光二极管像素单元电路以及显示面板，用于实现将触摸屏电路集成于AMOLED像素单元电路中以及制作具有触摸屏功能的AMOLED显示面板。像素单元电路包括：驱动模块（11），用于对触摸感应模块（16）产生的感应信号进行放大并通过感应信号输出模块（17）输出，以及驱动发光模块（13）；发光控制模块（12），用于控制发光模块（13）发光；阈值补偿模块（14），用于对驱动模块（11）进行阈值电压补偿；充电模块（15），用于为阈值补偿模块（14）充电；触摸感应模块（16），用于产生感应信号并输出给驱动模块（11）；感应信号输出模块（17），用于将经驱动模块（11）放大后的感应信号输出。

Description

本发明涉及显示技术领域， 尤其涉及一种有源矩阵有机发光二极管像素单 元电路， 以及显示面板。
触摸屏集成在液晶盒内 TSP in Cell技术是将 TSP(T uch Screen Panel 蝕摸 屏)的感应器 Sensor及其驱动电路， 利用阵列 Array工艺制作在 Array基板上。 将 TSP Sensor集成于液晶显示屏面板液晶盒 LCD(Liquid Crystal Display 液晶 显示屏)面板内部， 可以使产品轻薄化， 功能多样化， 并有效提高触摸屏可靠 性。
图 1(a),图 1(b)是现有技术中的基本光感应式 TSP in Cell电路，图 1(a)中， Sensor采用光电二极管 D1感应光照， 并产生漏电来检测触摸信号。 图 1(b), Sensor采用感应电容 C2感应光照， 依靠感应电容耦合和电容变化来检测蝕摸 信号。 TFT(Thin- Film Transistor, 薄膜晶体管） T1 作为放大晶体管， 用于放大 D1检测触摸信号后的电压变化， 增强 TSP m Cell电路输出驱动能力， 供外部 TSP的读出电路正确读取检測结果。
AMOLED (Active Matrix Organic Light Emitting Diode, 有源矩阵有机发光 二极管）相比传统的液晶面板， 具有反应速度较快、 对比度更高、 视角较广等 特点。 AMOLED 的像素依靠 Array基板上相关驱动电路驱动发光显示， 图 2 为 AMOLED的像素单元电路的一种实施例。
如果筒单将图 1(a)或图 1(b)所示 TSP in Cell电路集成于图 2所示 AMOLED 像素单元电路中，除去已有的 5个 TFT和 2个电容，还需再加入 3个 TFT和 1 个电容， 同时控制信号线除 3个控制信号和 2个电源外， 还需再加入 3个控制 信号， AMOLED像素中将无足够空间以增加这些 TFT和信号线。 因此， 现有 技术不能将 TSP in Cell电路集成于 AMOLED像素单元电路中。 本发明实施例提供了一种有源矩阵有机发光二极管像素单元电路， 以及显 示面板， 用于实现将触摸屏电路集成于 AMOLED像素单元电路中， 以及制作 具有触摸屏功能的 AMOLED显示面板。
本发明实施例提供的一种有源矩阵有机发光二极管 AMOLED像素单元电 路， 包括发光模块、 驱动模块、 充电模块、 阈值补偿模块、 发光控制模块、 触 摸感应模块和感应信号输出模块； 其中，
驱动模块， 用于对触摸感应模块产生的感应信号进行放大并通过感应信号 输出模块输出， 以及驱动发光模块；
发光控制模块， 用于控制发光模块发光；
阈值补偿模块， 用于对驱动模块迸行阈值电压补偿；
充电模块， 用于为阈值补偿模块充电；
触摸感应模块， 用于产生感应信号并输出给驱动模块；
感应信号输出模块， 用于将经驱动模块放大后的感应信号输出。
本发明实施例提供的一种显示面板包括所述 AMOLED像素单元电路。 通过以上技术方案可知， 本发明中在现有 AMOLED像素单元电路中新增 较少的电路元件， 通过共用数据线、 电路元件及控制信号等， 实现了在
AMOLED像素单元电路中集成 TSP in Cell电路。
图 l(a)、 图 1(b)是现有技术中的触摸屏电路示意图；
图 2是现有技术中的 AMOLED像素单元电路示意图；
图 3是本发明实施例提供的一种 AMOLED像素单元电路示意图； 图 4是本发明另一实施例提供的一种 AMOLED像素单元电路示意图； 图 5是本发明实施例提供的 AMOLED像素单元电路的控制信号的时序图； 图 6是本发明实施例提供的 AMOLED像素单元电路的控制信号的电平大
具体实施方式
本发明实施例提供了一种有源矩阵有机发光二极管像素单元电路， 以及显 示面板， 用于实现将触摸屏电路集成于 AMOLED像素单元电路中， 以及制作 具有触摸屏功能的 AMOLED显示面板。
参见图 3， 本发明实施例提供的一种有源矩阵有机发光二极管 AMOLED 像素单元电路， 包括发光模块 13、 驱动模块 11、 充电模块 15、 阈值补偿模块 14、 发光控制模块 12、 触摸感应模块 16和感应信号输出模块 17; 其中， 驱动模块 11 , 用于对触摸感应模块 16产生的感应信号进行放大并通过感 应信号输出模块 Π输出， 以及驱动发光模块 13 ;
发光控制模块 12， 用于控制发光模块 13发光；
阈值补偿模块 14, 用于对驱动模块 1 !进行阈值电压补偿；
充电模块 15 , 用于为阈值补偿模块 14充电；
触摸感应模块 16, 用于产生感应信号并输出给驱动模块 11 ;
感应信号输出模块 17， 用于将经驱动模块！1放大后的感应信号输出。 较佳地， 所述驱动模块 11包括第一晶体管 Tl， 其栅极与所述阈值补偿模 块 14连接， 具体地如图 3所示， 通过 Ρ3节点连接， 另外两极分别与所述发光 控制模块 12的第一节点 P1和第二节点 Ρ2连接。
较佳地， 所述发光控制模块！2包括第二晶体管 Τ2和第五晶体管 Τ5 , 其 中，第二晶体管 Τ2的栅极与本级 AMOLED像素单元电路第二信号控制线（对 应本级 AMOLED像素单元电路第二控制信号 CR2...n) 连接， 另外两极分别与 电源线 （对应电源控制信号 POWER) 和所述第一节点 P1 连接； 第五晶体管 T5的栅极与本级 AMOLED像素单元电路第二信号控制线连接，另外两极分别 与所述第二节点 P2和低电压电平 VSS信号线连接。
较佳地， 所述发光模块 13包括第一发光二极管 Dl， 其一端与所述第二节 点 P2连接， 另一端与低电压电平信号线 （对应低电压电平信号 VSS ) 连接。
较佳地， 所述阈值补偿模块 14包括第四晶体管 T4、 第一电容 C1和第二 电容 C2;
其中， 所述第四晶体管 Τ4的栅极与本级 AMOLED像素单元电路第一信 号控制线 （对应本级 AMOLED像素单元电路第一控制信号 CRlja) 连接， 另 外两极分别与所述第一节点 Pi和所述第一晶体管 Ti的栅极连接；所述第一电 容 C1连接于所述第一晶体管 T1的栅极和所述第二节点 Ρ2之间， 所述第二电 容 C2连接于所述充电模块！5和所述第一晶体管 T1的栅极之间。
较佳地， 所述充电模块 15包括第三晶体管 T3， 其栅极与本级 AMOLED 像素单元电路第三信号控制线（对应第四控制信号 CR3...n )连接， 另外两极分 别与所述数据线 （对应数据信号 DATA.. OLED&TSP ) 和所述阈值补偿模块 14 中的第二电容 C2连接。
较佳地，所述触摸感应模块 16包括第七晶体管 T7和第二发光二极管 D2; 其中， 所述第七晶体管 T7的栅极与上一级 AMOLED像素单元电路第三信号 控制线 （对应上一级 AMOLED像素单元电路第三控制信号 CR3....n- 1 ) 连接， 另外两极分别与所述第二发光二极管 D2和所述第一晶体管 T1 的栅极连接； 所述第二发光二极管 D2的一端与所述第七晶体管 T7连接， 另一端与所述低 电压电平信号线连接； 或者，
参见图 4， 是本发明另一实施例提供的一种 AMOLED像素单元电路示意 图， 所述触摸感应模块包括第七晶体管 T7和感应电容 C3 ; 其中， 所述第七晶 体管 T7的栅极与上一级 AMOLED像素单元电路第三信号控制线连接， 另外 两极分别与所述感应电容 C3和所述第一晶体管 T1的栅极连接。 感应电容 C3 一端与第七晶体管 T7连接， 另一端需要与外界例如人体接触， 依靠感应电容 耦合和电容变化来改变第一电容 C1的电压。
参照回图 3， 较佳地， 所述感应信号输出模块 17包括第六晶体管 T6, 其 栅极与上一级 AMOLED像素单元电路第三信号控制线连接， 另外两极分别与 所述数据线和所述第一节点 P!连接。
较佳地， 所述第二发光二极管 D2的阳极与所述低电压电平信号线连接， 阴极与第七晶体管 T7连接。
较佳地，所述第一发光二极管 D1的阳极与所述第二节点 P2连接， 阴极与 低电压电平信号线连接。
较佳地， 第一晶体管 Tl、 第二晶体管 Τ2、 第三晶体管 Τ3、 第四晶体管 Τ4、 第六晶体管 Τ6、 第七晶体管 Τ7均为 Ν型薄膜晶体管 TFT, 第五晶体管 T5为 P型 TFT。
所述触摸感应模块 16产生感应信号之后， 经第一晶体管 ΤΠ放大输出， 此 时第六晶体管 T6导通，将第一晶体管 T1输出的电流传输至数据线，通过数据 线对触摸产生的信号进行读取。
当第七晶体管 T7导通时， 感应元件 D2或者 C3才能产生感应信号并输入 第一晶体管 TI。
触摸感应模块 16还共用电容 作为存储电容， 以及共用电源线， 电源线 交替输入 TSP in cell电路和 AMOLED电路工作所需电平。
本发明实施例中所述的低电压电平信号 VSS 为截止电平， 其电平值保持 不变。
图 4所示的结构与图 3所示的结构， 区别包括当所述感应元件为感应电容 时， 感应电容一端与第七晶体管连接， 另一端需要与外界例如人体接触， 依靠 感应电容耦合和电容变化来改变第一电容电压， 其它部分连接关系没有区别。
下面结合图 3、 图 5和图 6给出本发明实施例提供的电路的具体工作原理 的解释说明。
本发明实施例中的工作信号的时序关系如图 5所示， 本发明实施例提供的 电路包括六个工作阶段： 初始 Init阶段、 感测 Photo阶段、 读取 Read阶段、 充 电 Charge阶段、写入 Write阶段、有机发光二极管 OLED阶段。图 5中的 VDATA 是数据线 DATA...OLED&TSP的灰阶电压， 取值范围为 [VDL， VDH] , 不同的 灰阶电压下 D1亮度不同。 下面对各个阶段分别进行说明。 图 5所示各个信号 的电平取值的大小关系如图 6所示， 竖直方向上显示电平的大小， 高度越高的 表示电平越大， 相反， 高度越低的表示电平越小。 从图 6 中可以看出： VSS< VDL< VDI-KVINKVDD, 这些电平的取值均是预先设置好的， 具体值可以根 据实际需要进行设置。
Init阶段： T7导通，将作为 TSP Sensor的光电二极管 D2接入作为放大 TFT 的 T1的栅极， C1为放大 TFT T1的存储电容。 T2和 T4导通， POWER电平 为 VINI， 迸行 TSP的初始化， 即将连接 T1的栅极的存储电容 C1预充电至初 始化电平 VINI, 以保证后面阶段 T!工作于饱和放大状态。
Photo阶段： T2、 Τ4截止， Τ7导通。 光电二极管 D2检测面板 Panel的触 摸状态。 当 Panel被手指触摸， 则外部光源无法照射到光电二极管 D2 , 则 D2 的受光较少， 光感应漏电流小， 贝 Photo阶段 C1 电压因为漏电产生的电平变 化较小； 当 Panel未被手指蝕摸， 则外部光源可以照射到光电二极管 D2 , 则 D2受光， 产生较大的光感应漏电流， 贝 U Photo阶段 C 1电压因为漏电产生较大 电平变化。 因此， 如果被触摸， 则 T 1 的栅极电压相对初始电压变化小； 如果 未被触摸， 则 T 1的栅极电压相对初始电压变化大。
READ阶段： Photo阶段的电平结果被存储于 C1上。此时 T6为导通， T3、 Τ4截止， DATA....OLED&TSP此时用作 TSP输出结果的读出线， T1将其栅极 电压经由第一节点 P1和 Τ6放大输出到读出取线，输出给外围 TSP读取电路。
以上 3个阶段为 TSP in Cell工作， 能够感应外界蝕摸并输出感应信号。在 TSP in Cell工作阶段结束后， 该电路进入 AMOLED电路工作阶段。
Charge阶段： T6， Τ7截止； 首先， POWER为比 VDD稍低的电压 T2.、 Τ4导通， C 1电压为 IM; 然后， POWER为 VDD， T2、 Τ4截止， 贝 !J C I 放电至电压为 Ti的阈值电压 TH。
Write阶段: T3导通，数据线在之前的 Charge阶段先输入了灰阶电压 DAIA， 然后在该 Wnte 阶段输入 ί¾ί ; 所以 CI 电压即 T 1 栅极电压变为
2
^ΤΗ + (^INi ― ¾ΑΤΛ )
OLED阶段： T2导通， T3、 T5 T1工作， D 1发光。 T 1输出的电流 大小为：
Figure imgf000008_0001
其中， k为预先设置的常数， PDAIA的取值范围为 VDL至 VDH。
本发明实施例还提供了一种显示面板，包括上述 AMOLED像素单元电路。 综上所述， 本发明实施例通过重新设计各工作信号的^序及电平值， 在现 有 AMOLED像素单元电路中新增较少的电路元件， 通过共用数据线、 电路元 件及控制信号等， 实现了在 AMOLED像素单元电路中集成 TSP m Cell电路。
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发 明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要求及 其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

一种有源矩阵有机发光二极管 AMOLED像素单元电路， 其特征在于， 包括： 发光模块、 充电模块、 阈值补偿模块、 驱动模块、 发光控制模块、 触摸 感应模块和感应信号输出模块； 其中，
驱动模块，用于对触摸感应模块产生的感应信号迸行放大并通过感应信号 输出模块输出， 以及驱动发光模块；
发光控制模块， 用于控制发光模块发光；
阈值补偿模块， 用于对驱动模块进行阈值电压补偿；
充电模块， 用于为阈值补偿模块充电；
触摸感应模块， 用于产生感应信号并输出给驱动模块；
感应信号输出模块， 用于将经驱动模块放大后的感应信号输出。
2、 如权利要求 1 所述的电路， 其特征在于， 所述驱动模块包括第一晶体 管， 其栅极与所述 AMOLED像素单元电路的第三节点连接， 另外两极分别与 所述 AMOLED像素单元电路的第一节点和第二节点连接， 其中， 所述第三节 点为所述驱动模块与所述阈值补偿模块的连接点， 所述第一节点为所述驱动模 块与所述发光控制模块的连接点，所述第二节点为所述驱动模块与所述发光控 制模块和所述发光模块的共同连接点。
3、 如权利要求 2所述的电路， 其特征在于， 所述发光控制模块包括第二 晶体管和第五晶体管， 其中， 第二晶体管的栅极与本级 AMOLED像素单元电 路第二信号控制线连接， 另外两极分别与电源线和所述第一节点连接； 第五晶 体管的栅极与本级 AMOLED像素单元电路第二信号控制线连接， 另外两极分 别与所述第二节点和低电压电平信号线连接。
4、 如权利要求 3所述的电路， 其特征在于， 所述发光模块包括第一发光 二极管， 其一端与所述第二节点连接， 另一端与低电压电平信号线连接。
5、 如权利要求 4所述的电路， 其特征在于， 所述阈值补偿模块包括第四 晶体管、 第一电容和第二电容；
其中， 所述第四晶体管的栅极与本级 AMOLED像素单元电路第一信号控 制线连接， 另外两极分别与所述第一节点和所述第一晶体管的栅极连接； 所述 第一电容连接于所述第一晶体管的栅极和所述第二节点之间，所述第二电容连 接于所述充电模块和所述第一晶体管的栅极之间。
6、 如权利要求 5所述的电路， 其特征在于， 所述充电模块包括第三晶体 管， 其栅极与本级 AMOLED像素单元电路第三信号控制线连接， 另外两极分 别与数据线和所述阈值补偿模块中的第二电容连接。
Ί、 如权利要求 6所述的电路， 其特征在于， 所述触摸感应模块包括第七 晶体管和第二发光二极管； 其中， 所述第七晶体管的栅极与上一级 AMOLED 像素单元电路第三信号控制线连接， 另外两极分别与所述第二发光二极管和所 述第一晶体管的栅极连接； 所述第二发光二极管的一端与所述第七晶体管连接, 另一端与所述低电压电平信号线连接。
8、 如权利要求 6所述的电路， 其特征在于， 所述触摸感应模块包括第七 晶体管和感应电容； 其中， 所述第七晶体管的栅极与上一级 AMOLED像素单 元电路第三信号控制线连接， 另外两极分别与所述感应电容和所述第一晶体管 的栅极连接。
9、 如权利要求 7或 8所述的电路， 其特征在于， 所述感应信号输出模块 包括第六晶体管， 其栅极与上一级 AMOLED像素单元电路第三信号控制线连 接， 另外两极分别与所述数据线和所述第一节点连接。
10、 如权利要求 7或 8所述的电路， 其特征在于， 所述第二发光二极管的 阳极与所述低电压电平信号线连接， 阴极与第七晶体管连接。
11、 如权利要求 4所述的电路， 其特征在于， 所述第一发光二极管的阳极 与所述第二节点连接， 阴极与低电压电平信号线连接。
12、 如权利要求 2- 8任一权项所述的电路， 其特征在于， 第一晶体管、 第 二晶体管、 第三晶体管、 第四晶体管、 第六晶体管、 第七晶体管均为 N型薄膜 晶体管 TFT， 第五晶体管为 P型 TFT。
13、 一种显示面板， 其特征在于， 包括权利要求 1-8任一权项所述的有源 矩阵有机发光二极管 AMOLED像素单元电路。
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US20150302801A1 (en) 2015-10-22

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