WO2019033484A1 - 柔性显示器及其弯折显示异常的改善方法和改善装置 - Google Patents

柔性显示器及其弯折显示异常的改善方法和改善装置 Download PDF

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Publication number
WO2019033484A1
WO2019033484A1 PCT/CN2017/101543 CN2017101543W WO2019033484A1 WO 2019033484 A1 WO2019033484 A1 WO 2019033484A1 CN 2017101543 W CN2017101543 W CN 2017101543W WO 2019033484 A1 WO2019033484 A1 WO 2019033484A1
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thin film
film transistor
pixel
driving thin
flexible panel
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PCT/CN2017/101543
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English (en)
French (fr)
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黄泰钧
梁鹏飞
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深圳市华星光电半导体显示技术有限公司
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Priority to US15/750,184 priority Critical patent/US20190057982A1/en
Publication of WO2019033484A1 publication Critical patent/WO2019033484A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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]
    • 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]
    • G09G3/3266—Details of drivers for scan 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
    • 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

Definitions

  • the invention belongs to the field of flexible display technologies, and in particular to a flexible display and an improved method and an improved device for bending display abnormality.
  • OLED display panels have become very popular emerging flat panel products at home and abroad. This is because OLED display panels have self-luminous, wide viewing angle, short response time, high luminous efficiency, and wide Color gamut, thin thickness, large size and flexible display panel, and simple process, it also has the potential for low cost.
  • the threshold voltage and the intrinsic conductive factor of the driving thin film transistor of the OLED at the bent portion are changed, thereby causing a change in the driving current of the OLED.
  • the visual difference caused by the superimposed bending causes an abnormality in the display of the flexible display.
  • a method for improving an abnormality of a bending display of a flexible display comprising the steps of: detecting a characteristic parameter of a driving thin film transistor of each pixel in a flexible panel during bending display; a characteristic parameter of the driving thin film transistor of each pixel calculates a bending position of the flexible panel; an image visual correction is performed on an image displayed by the pixel of the flexible panel at the bending position, and the flexibility is performed The characteristic parameters of the driving thin film transistor of the pixel at the bent position of the panel are corrected.
  • the implementing step "displays the pixel of the flexible panel at the bending position
  • a specific method of performing image visual correction of the image includes performing image sharpening processing on an image displayed by the pixel of the flexible panel at the bent position.
  • the specific method of implementing the step of “correcting the characteristic parameter of the driving thin film transistor of the pixel of the flexible panel at the bending position” includes: positioning the flexible panel at the bending position The mobility and/or channel aspect ratio and/or equivalent capacitance of the driving thin film transistor of the pixel are corrected.
  • the specific method of implementing the step “detecting the characteristic parameter of the driving thin film transistor of each pixel in the flexible panel during the bending display” includes: detecting the gate of the driving thin film transistor of each pixel in the flexible panel during the bending display Voltage and / or mobility.
  • an improved apparatus for bending display abnormality of a flexible display comprising: a detecting module for detecting a driving thin film transistor of each pixel in the flexible panel during bending display a characteristic parameter; a bending position calculation module, configured to calculate a bending position of the flexible panel according to the detected characteristic parameter of the driving thin film transistor of each pixel; and a processing module, configured to locate the flexible panel
  • the image displayed by the pixel at the bending position performs image visual correction, and corrects characteristic parameters of the driving thin film transistor of the pixel of the flexible panel located at the bending position.
  • processing module is further configured to perform image sharpening processing on an image displayed by the pixel of the flexible panel at the bending position.
  • processing module is further configured to modify a mobility and/or a channel width to length ratio and/or an equivalent capacitance of a driving thin film transistor of the pixel of the flexible panel at the bent position.
  • the detecting module is further configured to detect a gate voltage and/or a mobility of a driving thin film transistor of each pixel in the flexible panel when the display is bent.
  • a flexible display includes: a flexible panel including a plurality of pixels, the pixel including a driving thin film transistor and an organic light emitting diode connected to the driving thin film transistor; a power supply voltage device Providing a power supply positive voltage to the driving thin film transistor and a negative power supply voltage to the organic light emitting diode; Forming, when the flexible panel is bent and displayed, correcting the pixel at the bending position of the flexible panel to generate a correction signal; and timing controller for scanning control signal and data control signal generated according to the correction signal Performing a correction; a scan driver for generating a corrected scan voltage according to the corrected scan control signal, and providing the corrected scan voltage to the pixel; and a data driver for generating a corrected data voltage according to the corrected data control signal, and The corrected data voltage is provided to the pixel.
  • the pixel further includes a second thin film transistor, a third thin film transistor, a storage capacitor, a read line, and a switch control line; a source of the driving thin film transistor is connected to an anode of the organic light emitting diode, and the driving thin film transistor a drain connected to the power supply voltage to receive the positive voltage of the power supply; a gate of the driving thin film transistor is connected to the drain of the second thin film transistor; a cathode of the organic light emitting diode is connected to the power supply voltage to receive the negative voltage of the power supply; a gate of the second thin film transistor is connected to the scan line, and a source thereof is connected to the data line; a storage capacitor is connected between the source and the gate of the driving thin film transistor; and a gate of the third thin film transistor is connected to the switch control line, The source of the third thin film transistor is connected to the read line, the drain of the third thin film transistor is connected to the source of the first thin film transistor, and the read line is connected to the improvement device.
  • the invention has the beneficial effects that when the flexible display is displayed in a bend, the pixels at the bending position are corrected to improve the display anomaly, thereby improving the display quality.
  • FIG. 1 is a schematic structural view of a flexible display according to an embodiment of the present invention.
  • FIG. 2 is a circuit configuration diagram of a pixel in accordance with an embodiment of the present invention.
  • FIG. 3 is a flow chart of a method of improving a bend display anomaly of a flexible display in accordance with an embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a flexible display according to an embodiment of the present invention.
  • a flexible display includes a flexible panel 100, a scan driver 200, a data driver 300, a timing controller 400, a power supply voltage 500, and an improvement device 600.
  • the flexible panel 100 includes a plurality of pixels PX, and the plurality of pixels PX are connected to display signal lines.
  • the display signal line may include a plurality of scanning lines G 1 to G n that transmit a scanning voltage and a plurality of data lines D 1 to D m that transmit the data voltage.
  • the scanning lines G 1 to G n extend in the row direction and are substantially parallel to each other, and the data lines D 1 to D m extend in the column direction and are substantially parallel to each other.
  • the scan driver 200 is connected to the scan lines G 1 to G n, G 1 and applying a scanning voltage to the scanning line G n. Scan voltage supplied to the pixels PX through the plurality of scan lines G 1 to G n.
  • the data driver 300 is connected to the data lines D 1 to D m and applies data voltages to the data lines D 1 to D m .
  • the data voltage is supplied to the plurality of pixels PX through the data lines D 1 to D m .
  • the timing controller 400 controls the operations of the scan driver 200 and the data driver 300.
  • the timing controller 400 receives image signals (such as R, G, and B signals) from an external graphics controller (not shown). The timing controller 400 appropriately processes the image signals to generate scan control signals and data control signals. Then, the timing controller 400 transmits the scan control signal to the scan driver 200 and transmits the data control signal to the data driver 300.
  • image signals such as R, G, and B signals
  • the timing controller 400 appropriately processes the image signals to generate scan control signals and data control signals. Then, the timing controller 400 transmits the scan control signal to the scan driver 200 and transmits the data control signal to the data driver 300.
  • the scan driver 200 generates a scan voltage in response to a scan control signal, and a scan voltage is applied to the scanning line G to G n.
  • the data driver 300 generates a data voltage by responding to the data control signal and applies the data voltage to the data lines D 1 to D m .
  • the power supply voltage source 500 generates a power supply positive voltage OVDD and a power supply negative voltage OVSS, and will be powered
  • the source positive voltage OVDD and the power supply negative voltage OVSS are supplied to the plurality of pixels PX.
  • FIG. 2 is a circuit configuration diagram of a pixel in accordance with an embodiment of the present invention.
  • a pixel PX includes: a first thin film transistor (or a driving thin film transistor) T1, a second thin film transistor T2, a third thin film transistor T3, a storage capacitor Cst, an organic light emitting diode OLED, and a read. Take line RD and switch control line SEN.
  • the source of the first thin film transistor T1 is connected to the anode of the organic light emitting diode OLED; the drain of the first thin film transistor T1 is connected to the power supply voltage device 500 to receive the power supply positive voltage OVDD; the gate of the first thin film transistor T1 is connected to the second a drain of the thin film transistor T2; a cathode of the organic light emitting diode OLED is connected to the power supply voltage source 500 to receive the power source negative voltage OVSS; a gate of the second thin film transistor T2 is connected to the scan line G i (1 ⁇ i ⁇ n), and The source is connected to the data line D j (1 ⁇ j ⁇ m); the storage capacitor Cst is connected between the source and the gate of the driving thin film transistor T1; the gate of the third thin film transistor T3 is connected to the switching control line SEN, The source of the third thin film transistor T3 is connected to the read line RD, the drain of the third thin film transistor T3 is connected to the source of the first thin film transistor T
  • the switch control line SEN can control whether or not the third thin film transistor T3 is turned on or not.
  • the improving device 600 reads the characteristic parameter of the driving thin film transistor T1 of the pixel PX through the read line RD and the turned-on third thin film transistor T3.
  • the improving device 600 when the flexible display according to the embodiment of the present invention performs the bending display, the improving device 600 performs an improvement correction on the pixel PX at the bending position, and generates a correction signal.
  • the improvement apparatus 600 includes: a detection module 610, a bending position calculation module 620, and a processing module 630.
  • the detecting module 610 is configured to detect a characteristic parameter of the driving thin film transistor T1 of each pixel PX in the flexible panel 100 when the display is bent. Specifically, the detecting module 610 is configured to detect a gate voltage and/or a mobility of the driving thin film transistor T1 of each pixel PX in the flexible panel 100 when the display is bent.
  • the bending position calculation module 620 is configured to calculate the flexibility according to the detected characteristic parameter of the driving thin film transistor T1 of each pixel PX (ie, the gate voltage and/or mobility detected by the detecting module 610). The bent position of the panel 100.
  • the processing module 630 performs image visual correction on the image displayed by the pixel PX of the flexible panel 100 at the bending position, and performs characteristic parameters of the driving thin film transistor T1 of the pixel PX of the flexible panel 100 at the bending position. Correction is made to generate a correction signal. Specifically, the processing module 630 performs image sharpening processing on the image displayed by the pixel PX of the flexible panel 100 at the bending position, and the processing module 630 also pairs the pixel PX of the flexible panel 100 at the bent position. The mobility and/or channel width-to-length ratio and/or equivalent capacitance of the driving thin film transistor T1 are corrected, and a correction signal carrying image visual correction information and characteristic parameter correction information for driving the thin film transistor T1 is generated.
  • U represents the mobility of the driving thin film transistor T1
  • COX represents the equivalent capacitance
  • W represents the channel width of the driving thin film transistor T1
  • L represents the channel length of the driving thin film transistor T1.
  • the driving current of the OLED changes.
  • the mobility U and/or the channel width to length ratio W of the driving thin film transistor T1 of the pixel PX located at the bending position by the processing module 630 is W. / L and / or COX equivalent capacitance is corrected, so that the driving current of the organic light emitting diode OLED I 1 unchanged.
  • the processing module 630 performs image sharpening processing on the image displayed by the pixel PX of the flexible panel 100 at the bending position to eliminate visual differences.
  • the timing controller 400 receives the correction signal and corrects the scan control signal and the data control signal generated therefrom based on the correction signal.
  • the timing controller 400 includes a data processing module 410 and a signal correction module 420.
  • data processing module 410 receives image signals (such as R, G, and B signals) from an external graphics controller (not shown). The data processing module 410 processes the image signals as appropriate to generate scan control signals and data control signals.
  • image signals such as R, G, and B signals
  • the data processing module 410 processes the image signals as appropriate to generate scan control signals and data control signals.
  • the signal correction module 420 receives the correction signal provided by the processing module 630, and corrects the scan control signal and the data control signal processed by the data processing module 410 according to the correction signal.
  • the scan driver 200 generates a scan voltage in accordance with the correction scan control signal corrected, the correction and G 1 is applied to the scanning voltage of the scanning line G n.
  • the data driver 300 generates the control signal voltage according to the correction data corrected data, 1 to D m is applied to the correction data voltage of the data line D.
  • the corrected scan voltage and the corrected data voltage are used to keep the display of each pixel PX constant before and after the bending.
  • FIG. 3 is a flow chart of a method of improving a bend display anomaly of a flexible display in accordance with an embodiment of the present invention.
  • a method of improving a bending display abnormality of a flexible display includes steps S310 to S360.
  • step S310 the characteristic parameter of the driving thin film transistor T1 of each pixel PX in the flexible panel 100 during the bending display is detected by the detecting module 610.
  • the detection module 610 detects the gate voltage and/or mobility of the driving thin film transistor T1 of each pixel PX in the flexible panel 100 when the display is bent.
  • step S320 the bending position calculation module 620 calculates the characteristic parameter of the driving thin film transistor T1 of each pixel PX (ie, the gate voltage and/or mobility detected by the detecting module 610). The bent position of the flexible panel 100.
  • step S330 the image displayed by the pixel PX located at the bending position of the flexible panel 100 is visually corrected by the processing module 630, and the driving of the pixel PX of the flexible panel 100 at the bending position is performed.
  • the characteristic parameters of the thin film transistor T1 are corrected.
  • the image displayed by the pixel PX of the flexible panel 100 at the bending position is subjected to image sharpening processing by the processing module 630, and the processing module 630 is also used to position the flexible panel 100 at the bent position.
  • the mobility and/or the channel width-to-length ratio and/or the equivalent capacitance of the driving thin film transistor T1 of the pixel PX are corrected so that the display of each pixel PX of the flexible panel 100 remains unchanged until before and after the bending.
  • the pixels at the bending position are corrected to improve the display abnormality, thereby improving the display quality.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)
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Abstract

一种柔性显示器的弯折显示异常的改善装置(600)、柔性显示器、柔性显示器的弯折显示异常的改善方法，包括步骤：侦测弯折显示时柔性面板(100)中每个像素(PX)的驱动薄膜晶体管(T1)的特性参数(S310)；根据侦测到的每个像素(PX)的驱动薄膜晶体管(T1)的特性参数计算出柔性面板(100)的弯折位置(S320)；对柔性面板(100)的位于弯折位置处的像素(PX)显示的图像进行图像视觉修正，并对柔性面板(100)的位于弯折位置处的像素(PX)的驱动薄膜晶体管(T1)的特性参数进行修正。当柔性显示器在弯折显示时，对弯折位置处的像素进行修正，以改善显示异常现象，从而提高显示质量。

Description

柔性显示器及其弯折显示异常的改善方法和改善装置 技术领域
本发明属于柔性显示技术领域，具体地讲，涉及一种柔性显示器及其弯折显示异常的改善方法和改善装置。
背景技术
近年来，有机发光二极管(Organic Light-Emitting Diode，OLED)显示面板成为国内外非常热门的新兴平面显示器产品，这是因为OLED显示面板具有自发光、广视角、短反应时间、高发光效率、广色域、薄厚度、可制作大尺寸与可挠曲的显示面板及制程简单等特性，而且它还具有低成本的潜力。
在采用OLED显示面板的柔性显示器中，当柔性显示器在弯折显示时，在弯折处的OLED的驱动薄膜晶体管的阈值电压和本征导电因子均会发生变化，从而导致OLED的驱动电流变化，此外叠加弯折导致的视觉差异，会使柔性显示器的显示出现异常。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种在弯折显示时能够改善显示异常的柔性显示器及其弯折显示异常的改善方法和改善装置。
根据本发明的一方面，提供了一种柔性显示器的弯折显示异常的改善方法，其包括步骤：侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数；根据侦测到的每个像素的驱动薄膜晶体管的特性参数计算出所述柔性面板的弯折位置；对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像视觉修正，并对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正。
进一步地，实现步骤“对所述柔性面板的位于所述弯折位置处的像素显示 的图像进行图像视觉修正”的具体方法包括：对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像锐化处理。
进一步地，实现步骤“对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正”的具体方法包括：对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
进一步地，实现步骤“侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数”的具体方法包括：侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的栅极电压和/或迁移率。
根据本发明的另一方面，还提供了一种柔性显示器的弯折显示异常的改善装置，其包括：侦测模块，用于侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数；弯折位置计算模块，用于根据侦测到的每个像素的驱动薄膜晶体管的特性参数计算出所述柔性面板的弯折位置；处理模块，用于对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像视觉修正，并对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正。
进一步地，所述处理模块进一步用于对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像锐化处理。
进一步地，所述处理模块进一步用于对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
进一步地，所述侦测模块进一步用于侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的栅极电压和/或迁移率。
根据本发明的又一方面，又提供了一种柔性显示器，其包括：柔性面板，包括多个像素，所述像素包括驱动薄膜晶体管以及与所述驱动薄膜晶体管连接的有机发光二极管；电源电压器，被构造为向所述驱动薄膜晶体管提供电源正极电压，并向所述有机发光二极管提供电源负极电压；上述的改善装置，被构 造为当柔性面板弯折显示时对所述柔性面板的位于弯折位置处的像素进行修正，以产生修正信号；时序控制器，用于根据修正信号对其产生的扫描控制信号和数据控制信号进行修正；扫描驱动器，用于根据修正后的扫描控制信号产生修正扫描电压，并向所述像素提供所述修正扫描电压；数据驱动器，用于根据修正后的数据控制信号产生修正数据电压，并向所述像素提供所述修正数据电压。
可选地，所述像素还包括第二薄膜晶体管、第三薄膜晶体管、存储电容器、读取线和开关控制线；所述驱动薄膜晶体管的源极连接有机发光二极管的阳极，所述驱动薄膜晶体管的漏极连接到电源电压器，以接收电源正极电压；所述驱动薄膜晶体管的栅极连接到第二薄膜晶体管的漏极；有机发光二极管的阴极连接到电源电压器，以接收电源负极电压；第二薄膜晶体管的栅极连接到扫描线，且其源极连接到数据线；存储电容器连接在驱动薄膜晶体管的源极和栅极之间；第三薄膜晶体管的栅极连接到开关控制线，第三薄膜晶体管的源极连接到读取线，第三薄膜晶体管的漏极连接到第一薄膜晶体管的源极，读取线连接到所述改善装置。
本发明的有益效果：当柔性显示器在弯折显示时，对弯折位置处的像素进行修正，以改善显示异常现象，从而提高显示质量。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是根据本发明的实施例的柔性显示器的结构示意图；
图2是根据本发明的实施例的像素的电路结构图；
图3是根据本发明的实施例的柔性显示器的弯折显示异常的改善方法的流程图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施 例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
在附图中，为了清楚器件，夸大了层和区域的厚度。相同的标号在整个说明书和附图中表示相同的元器件。
图1是根据本发明的实施例的柔性显示器的结构示意图。
参照图1，根据本发明的实施例的柔性显示器包括：柔性面板100、扫描驱动器200、数据驱动器300、时序控制器400、电源电压器500和改善装置600。
具体而言，柔性面板100包括多个像素PX，多个像素PX与显示信号线连接。显示信号线可以包括传送扫描电压的多条扫描线G1至Gn和传送数据电压的多条数据线D1至Dm。扫描线G1至Gn按行方向延伸并且彼此大致平行，并且数据线D1至Dm按列方向延伸并且彼此大致平行。
扫描驱动器200连接到扫描线G1至Gn，并向扫描线G1至Gn施加扫描电压。扫描电压通过扫描线G1至Gn而提供给多个像素PX。
数据驱动器300连接到数据线D1至Dm，并向数据线D1至Dm施加数据电压。数据电压通过数据线D1至Dm而提供给多个像素PX。
时序控制器400控制扫描驱动器200和数据驱动器300的操作。
时序控制器400从外部图形控制器(未示出)接收图像信号(诸如R、G和B信号)。时序控制器400适当处理图像信号，从而产生扫描控制信号和数据控制信号。然后，时序控制器400将扫描控制信号传送到扫描驱动器200，并将数据控制信号传送到数据驱动器300。
扫描驱动器200通过响应于扫描控制信号而产生扫描电压，并向扫描线G1至Gn施加扫描电压。数据驱动器300通过响应于数据控制信号而产生数据电压，并将数据电压施加到数据线D1至Dm。
电源电压器500产生电源正极电压OVDD和电源负极电压OVSS，并将电 源正极电压OVDD和电源负极电压OVSS提供给多个像素PX。
图2是根据本发明的实施例的像素的电路结构图。
参照图2，根据本发明的实施例的像素PX包括：第一薄膜晶体管(或称驱动薄膜晶体管)T1、第二薄膜晶体管T2、第三薄膜晶体管T3、存储电容器Cst、有机发光二极管OLED、读取线RD和开关控制线SEN。
第一薄膜晶体管T1的源极连接有机发光二极管OLED的阳极；第一薄膜晶体管T1的漏极连接到电源电压器500，以接收电源正极电压OVDD；第一薄膜晶体管T1的栅极连接到第二薄膜晶体管T2的漏极；有机发光二极管OLED的阴极连接到电源电压器500，以接收电源负极电压OVSS；第二薄膜晶体管T2的栅极连接到扫描线Gi(1≤i≤n)，且其源极连接到数据线Dj(1≤j≤m)；存储电容器Cst连接在驱动薄膜晶体管T1的源极和栅极之间；第三薄膜晶体管T3的栅极连接到开关控制线SEN，第三薄膜晶体管T3的源极连接到读取线RD，第三薄膜晶体管T3的漏极连接到第一薄膜晶体管T1的源极，读取线RD连接到改善装置600，以使改善装置600通过读取线RD读取每个像素PX的驱动薄膜晶体管T1的特性参数。
此外，开关控制线SEN能够控制第三薄膜晶体管T3的导通与否。当第三薄膜晶体管T3导通时，改善装置600通过读取线RD以及导通的第三薄膜晶体管T3读取像素PX的驱动薄膜晶体管T1的特性参数。
参照图1和图2，当根据本发明的实施例的柔性显示器进行弯折显示时，改善装置600对弯折位置处的像素PX进行改善修正，并产生修正信号。
进一步地，根据本发明的实施例的改善装置600包括：侦测模块610、弯折位置计算模块620、处理模块630。
侦测模块610用于侦测弯折显示时柔性面板100中每个像素PX的驱动薄膜晶体管T1的特性参数。具体地，侦测模块610用于侦测弯折显示时柔性面板100中每个像素PX的驱动薄膜晶体管T1的栅极电压和/或迁移率。
弯折位置计算模块620用于根据侦测到的每个像素PX的驱动薄膜晶体管T1的特性参数(即侦测模块610侦测出的栅极电压和/或迁移率)计算出柔性 面板100的弯折位置。
处理模块630对柔性面板100的位于所述弯折位置处的像素PX显示的图像进行图像视觉修正，并对柔性面板100的位于所述弯折位置处的像素PX的驱动薄膜晶体管T1的特性参数进行修正，以产生修正信号。具体地，处理模块630对柔性面板100的位于所述弯折位置处的像素PX显示的图像进行图像锐化处理，并且处理模块630还对柔性面板100的位于所述弯折位置处的像素PX的驱动薄膜晶体管T1的迁移率和/或沟道宽长比和/或等效电容进行修正，并且产生携带图像视觉修正信息和驱动薄膜晶体管T1的特性参数修正信息的修正信号。
有机发光二极管OLED的驱动电流为I1＝k(Vsg-Vth)2＝k(Vs-Vg-Vth)2＝k(OVDD-Vg-Vth)2，其中，k为驱动薄膜晶体管T1的本征导电因子，由驱动薄膜晶体管T1本身特性决定，Vth为驱动薄膜晶体管T1的阈值电压，Vs为驱动薄膜晶体管T1的源极电压，Vg为驱动薄膜晶体管T1的栅极电压。
而
Figure PCTCN2017101543-appb-000001
其中，U表示驱动薄膜晶体管T1的迁移率，COX表示等效电容，W表示驱动薄膜晶体管T1的沟道宽度，L表示驱动薄膜晶体管T1的沟道长度。
如背景技术中所述，当柔性显示器在弯折显示时，在弯折位置处的像素PX的驱动薄膜晶体管T1的阈值电压Vth和本征导电因子k均会发生变化，从而使有机发光二极管OLED的驱动电流发生变化。为了保证有机发光二极管OLED的驱动电流不变，在本实施例中，通过处理模块630位于所述弯折位置处的像素PX的驱动薄膜晶体管T1的迁移率U和/或沟道宽长比W/L和/或等效电容COX进行修正，从而使有机发光二极管OLED的驱动电流I1不变。
此外，还如背景技术中所述，弯折位置处PX显示的图像会出现视觉差异，诸如图像拉伸等。为了消除视觉差异，在本实施例中，处理模块630对柔性面板100的位于所述弯折位置处的像素PX显示的图像进行图像锐化处理，以消除视觉差异。
时序控制器400接收修正信号，并根据该修正信号对其产生的扫描控制信号和数据控制信号进行修正。
进一步地，根据本发明的实施例的时序控制器400包括：数据处理模块410、信号修正模块420。
具体地，数据处理模块410从外部图形控制器(未示出)接收图像信号(诸如R、G和B信号)。数据处理模块410适当处理图像信号，从而产生扫描控制信号和数据控制信号。
信号修正模块420接收处理模块630提供的修正信号，并根据所述修正信号对数据处理模块410处理成的扫描控制信号和数据控制信号进行修正。
扫描驱动器200根据修正后的扫描控制信号产生修正扫描电压，并向扫描线G1至Gn施加修正扫描电压。
数据驱动器300根据修正后的数据控制信号产生修正数据电压，并向数据线D1至Dm施加修正数据电压。
所述修正扫描电压和所述修正数据电压用于使各像素PX的显示在弯折前后始终保持不变。
图3是根据本发明的实施例的柔性显示器的弯折显示异常的改善方法的流程图。
参照图3，根据本发明的实施例的柔性显示器的弯折显示异常的改善方法包括步骤S310至步骤S360。
参照图1至图3，在步骤S310中，利用侦测模块610侦测弯折显示时柔性面板100中每个像素PX的驱动薄膜晶体管T1的特性参数。具体地，利用侦测模块610侦测弯折显示时柔性面板100中每个像素PX的驱动薄膜晶体管T1的栅极电压和/或迁移率。
在步骤S320中，利用弯折位置计算模块620根据侦测到的每个像素PX的驱动薄膜晶体管T1的特性参数(即侦测模块610侦测出的栅极电压和/或迁移率)计算出柔性面板100的弯折位置。
在步骤S330中，利用处理模块630对柔性面板100的位于所述弯折位置处的像素PX显示的图像进行图像视觉修正，并对柔性面板100的位于所述弯折位置处的像素PX的驱动薄膜晶体管T1的特性参数进行修正。具体地，利用处理模块630对柔性面板100的位于所述弯折位置处的像素PX显示的图像进行图像锐化处理，并且还利用处理模块630对柔性面板100的位于所述弯折位置处的像素PX的驱动薄膜晶体管T1的迁移率和/或沟道宽长比和/或等效电容进行修正，以使柔性面板100的各像素PX的显示在弯折前后始终保持不变。
综上所述，根据本发明的实施例，当柔性显示器在弯折显示时，对弯折位置处的像素进行修正，以改善显示异常现象，从而提高显示质量。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (12)

  1. 一种柔性显示器的弯折显示异常的改善方法，其中，包括步骤：
    侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数；
    根据侦测到的每个像素的驱动薄膜晶体管的特性参数计算出所述柔性面板的弯折位置；
    对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像视觉修正，并对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正。
  2. 根据权利要求1所述的改善方法，其中，实现步骤“对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像视觉修正”的具体方法包括：对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像锐化处理。
  3. 根据权利要求1所述的改善方法，其中，实现步骤“对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正”的具体方法包括：对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
  4. 根据权利要求2所述的改善方法，其中，实现步骤“对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正”的具体方法包括：对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
  5. 根据权利要求1所述的改善方法，其中，实现步骤“侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数”的具体方法包括：侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的栅极电压和/或迁移率。
  6. 一种柔性显示器的弯折显示异常的改善装置，其中，包括：
    侦测模块，用于侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的特性参数；
    弯折位置计算模块，用于根据侦测到的每个像素的驱动薄膜晶体管的特性参数计算出所述柔性面板的弯折位置；
    处理模块，用于对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像视觉修正，并对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的特性参数进行修正。
  7. 根据权利要求6所述的改善装置，其中，所述处理模块进一步用于对所述柔性面板的位于所述弯折位置处的像素显示的图像进行图像锐化处理。
  8. 根据权利要求6所述的改善装置，其中，所述处理模块进一步用于对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
  9. 根据权利要求7所述的改善装置，其中，所述处理模块进一步用于对所述柔性面板的位于所述弯折位置处的像素的驱动薄膜晶体管的迁移率和/或沟道宽长比和/或等效电容进行修正。
  10. 根据权利要求6所述的改善装置，其中，所述侦测模块进一步用于侦测弯折显示时柔性面板中每个像素的驱动薄膜晶体管的栅极电压和/或迁移率。
  11. 一种柔性显示器，其中，包括：
    柔性面板，包括多个像素，所述像素包括驱动薄膜晶体管以及与所述驱动薄膜晶体管连接的有机发光二极管；
    电源电压器，被构造为向所述驱动薄膜晶体管提供电源正极电压，并向所述有机发光二极管提供电源负极电压；
    权利要求6所述的改善装置，被构造为当柔性面板弯折显示时对所述柔性面板的位于弯折位置处的像素进行修正，以产生修正信号；
    时序控制器，用于根据修正信号对其产生的扫描控制信号和数据控制信号 进行修正；
    扫描驱动器，用于根据修正后的扫描控制信号产生修正扫描电压，并向所述像素提供所述修正扫描电压；
    数据驱动器，用于根据修正后的数据控制信号产生修正数据电压，并向所述像素提供所述修正数据电压。
  12. 根据权利要求11所述的柔性显示器，其中，所述像素还包括第二薄膜晶体管、第三薄膜晶体管、存储电容器、读取线和开关控制线；
    所述驱动薄膜晶体管的源极连接有机发光二极管的阳极，所述驱动薄膜晶体管的漏极连接到电源电压器，以接收电源正极电压；所述驱动薄膜晶体管的栅极连接到第二薄膜晶体管的漏极；有机发光二极管的阴极连接到电源电压器，以接收电源负极电压；第二薄膜晶体管的栅极连接到扫描线，且其源极连接到数据线；存储电容器连接在驱动薄膜晶体管的源极和栅极之间；第三薄膜晶体管的栅极连接到开关控制线，第三薄膜晶体管的源极连接到读取线，第三薄膜晶体管的漏极连接到第一薄膜晶体管的源极，读取线连接到所述改善装置。
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