WO2020199239A1 - 一种 oled 显示面板 - Google Patents

一种 oled 显示面板 Download PDF

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Publication number
WO2020199239A1
WO2020199239A1 PCT/CN2019/082249 CN2019082249W WO2020199239A1 WO 2020199239 A1 WO2020199239 A1 WO 2020199239A1 CN 2019082249 W CN2019082249 W CN 2019082249W WO 2020199239 A1 WO2020199239 A1 WO 2020199239A1
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WIPO (PCT)
Prior art keywords
pixel
blue sub
sub
thin film
film transistor
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Ceased
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PCT/CN2019/082249
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English (en)
French (fr)
Inventor
郑旭煌
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Publication of WO2020199239A1 publication Critical patent/WO2020199239A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • 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

  • This application relates to the field of display technology, and in particular to an OLED display panel.
  • OLED Organic Light-Emitting Diode.
  • the traditional sub-pixel arrangement adopts the form of RGB sub-pixels with equal area and spaced apart from each other.
  • Pentile arrangement which is characterized by that adjacent sub-pixels will borrow (share) phases. Adjacent pixels form the three primary colors to simulate high resolution with low resolution.
  • LG display 4K panel technology adds white sub-pixels on the basis of RGB to form a RGBW pixel structure. The added white sub-pixels make display applications more flexible.
  • the characteristics of the three RGB organic light-emitting materials are quite different.
  • blue light-emitting materials are the most unstable and have the shortest light-emitting life.
  • the instability of the blue light-emitting material will lead to the largest change in the brightness of the blue sub-pixel under the same current change, resulting in color shift.
  • the traditional RGB sub-pixel structure with the same area cannot better compensate for the display difference caused by the material difference.
  • the Pentile is arranged to display fine content, the sharpness will be greatly reduced. With the RGBW architecture, the process is more complicated, and the aperture ratio and panel routing are more difficult.
  • the present application provides an OLED display panel, which can improve the service life and display effect of blue sub-pixels, while avoiding an increase in process difficulty and a reduction in screen resolution, thereby enhancing the reliability of the OLED display panel.
  • the present application provides an OLED display panel, including data lines, scan lines, and pixel units distributed in an array.
  • One of the pixel units includes four sub-pixels, and the sub-pixels include red sub-pixels, green sub-pixels, and first blue sub-pixels. Pixel, second blue sub-pixel;
  • the OLED display panel further includes a first power supply and a second power supply.
  • the first power supply is used to provide a first power high level
  • the second power supply is used to provide a second power low level.
  • Each pixel includes a first thin film transistor, a second thin film transistor and a storage capacitor;
  • the gate of the first thin film transistor is connected to the scan line, the source of the first thin film transistor is connected to the data line, and the drain of the first thin film transistor is connected in parallel to the gate of the second thin film transistor And the first plate of the storage capacitor;
  • the source of the second thin film transistor is connected to the first power source, and the drain of the second thin film transistor is connected to the second power source;
  • the scan signal transmitted by the scan line and the data signal transmitted by the data line are used to jointly cause the first blue sub-pixel and the second blue sub-pixel to alternately display.
  • the scan signal voltage of each sub-pixel has the same waveform.
  • the first blue sub-pixel and the second blue sub-pixel are respectively connected to one of the data lines.
  • the voltage of the data signal input by the second blue sub-pixel is continuously at a low level, and the second thin film of the second blue sub-pixel
  • the transistor is turned off, and the second blue sub-pixel is in a resting state;
  • the data signal voltage input by the first blue sub-pixel is at a high level, and the second thin film transistor of the first blue sub-pixel Turn on, the first blue sub-pixel is in a light-emitting state;
  • the data signal voltage input by the second blue sub-pixel is at a high level, the second thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is turned on.
  • the sub-pixel is in a light-emitting state; the data signal voltage input by the first blue sub-pixel is at a low level, the second thin film transistor of the first blue sub-pixel is turned off, and the first blue sub-pixel
  • the pixel is in a resting state; where M is a positive integer.
  • the voltages of the scan signals of the red sub-pixel and the green sub-pixel are positive voltages; all of the first blue sub-pixel and the second blue sub-pixel One of the voltages of the scan signal is a positive voltage and the other is a negative voltage; the voltages of the scan signals of the first blue sub-pixel and the second blue sub-pixel are alternately with those of the red sub-pixel and The voltage waveforms of the scanning signals of the green sub-pixels are consistent.
  • the first blue sub-pixel and the second blue sub-pixel share one data line, and the two are independently connected to one scan line; the red sub-pixel It shares one scan line with the green sub-pixel.
  • the voltage of the scan signal input by the second blue sub-pixel is a negative voltage, and the first thin film transistor of the second blue sub-pixel is turned off , The second blue subpixel is in a resting state; the voltage of the scanning signal input by the first blue subpixel is a positive voltage, and the first thin film transistor of the first blue subpixel is turned on, The first blue sub-pixel is in a light-emitting state;
  • the voltage of the scan signal input by the second blue sub-pixel is a positive voltage, the first thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is turned on.
  • the sub-pixel is in a light-emitting state; the voltage of the scan signal input by the first blue sub-pixel is a negative voltage, the first thin film transistor of the first blue sub-pixel is turned off, and the first blue sub-pixel The pixel is in a resting state; where M is a positive integer.
  • the voltage waveforms of the scan signals of the red sub-pixel and the green sub-pixel are consistent, and the red sub-pixel and the green sub-pixel share one scan line;
  • the voltage waveforms of the scan signals of the first blue sub-pixel and the second blue sub-pixel are consistent, and the first blue sub-pixel and the second blue sub-pixel share one scan line.
  • the first thin film transistor and the second thin film transistor of the red sub-pixel, the green sub-pixel, and the first blue sub-pixel are all n-type;
  • the first thin film transistor of the second blue sub-pixel is p-type, and the second thin film transistor is n-type.
  • the first blue The first thin film transistor and the second thin film transistor of the sub-pixel are both turned on, and the first blue sub-pixel is in a light-emitting state; the first thin film transistor of the second blue sub-pixel is turned off, and the The second blue sub-pixel is in a resting state;
  • the first blue sub-pixel of the first blue sub-pixel when the voltages of the scanning signals input by the first blue sub-pixel and the second blue sub-pixel are negative voltages, the first blue sub-pixel of the first blue sub-pixel When the thin film transistor is turned off, the first blue sub-pixel is in a resting state; the first thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is in a light-emitting state; where M is positive Integer.
  • the present application also provides an OLED display panel, including data lines, scan lines, and pixel units distributed in an array.
  • One of the pixel units includes four sub-pixels, and the sub-pixels include red sub-pixels and green sub-pixels. , The first blue sub-pixel and the second blue sub-pixel;
  • the OLED display panel further includes a first power source and a second power source, and each of the sub-pixels includes a first thin film transistor, a second thin film transistor, and a storage capacitor;
  • the gate of the first thin film transistor is connected to the scan line, the source of the first thin film transistor is connected to the data line, and the drain of the first thin film transistor is connected in parallel to the gate of the second thin film transistor And the first plate of the storage capacitor;
  • the source of the second thin film transistor is connected to the first power source, and the drain of the second thin film transistor is connected to the second power source;
  • the scan signal transmitted by the scan line and the data signal transmitted by the data line are used to jointly cause the first blue sub-pixel and the second blue sub-pixel to alternately display.
  • the scan signal voltage of each sub-pixel has the same waveform.
  • the first blue sub-pixel and the second blue sub-pixel are respectively connected to one of the data lines.
  • the voltage of the data signal input by the second blue sub-pixel is continuously at a low level, and the second thin film of the second blue sub-pixel
  • the transistor is turned off, and the second blue sub-pixel is in a resting state;
  • the data signal voltage input by the first blue sub-pixel is at a high level, and the second thin film transistor of the first blue sub-pixel Turn on, the first blue sub-pixel is in a light-emitting state;
  • the data signal voltage input by the second blue sub-pixel is at a high level, the second thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is turned on.
  • the sub-pixel is in a light-emitting state; the data signal voltage input by the first blue sub-pixel is at a low level, the second thin film transistor of the first blue sub-pixel is turned off, and the first blue sub-pixel
  • the pixel is in a resting state; where M is a positive integer.
  • the voltages of the scan signals of the red sub-pixel and the green sub-pixel are positive voltages; all of the first blue sub-pixel and the second blue sub-pixel One of the voltages of the scan signal is a positive voltage and the other is a negative voltage; the voltages of the scan signals of the first blue sub-pixel and the second blue sub-pixel are alternately with those of the red sub-pixel and The voltage waveforms of the scanning signals of the green sub-pixels are consistent.
  • the first blue sub-pixel and the second blue sub-pixel share one data line, and the two are independently connected to one scan line; the red sub-pixel It shares one scan line with the green sub-pixel.
  • the voltage of the scan signal input by the second blue sub-pixel is a negative voltage, and the first thin film transistor of the second blue sub-pixel is turned off , The second blue subpixel is in a resting state; the voltage of the scanning signal input by the first blue subpixel is a positive voltage, and the first thin film transistor of the first blue subpixel is turned on, The first blue sub-pixel is in a light-emitting state;
  • the voltage of the scan signal input by the second blue sub-pixel is a positive voltage, the first thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is turned on.
  • the sub-pixel is in a light-emitting state; the voltage of the scan signal input by the first blue sub-pixel is a negative voltage, the first thin film transistor of the first blue sub-pixel is turned off, and the first blue sub-pixel The pixel is in a resting state; where M is a positive integer.
  • the voltage waveforms of the scan signals of the red sub-pixel and the green sub-pixel are consistent, and the red sub-pixel and the green sub-pixel share one scan line;
  • the voltage waveforms of the scan signals of the first blue sub-pixel and the second blue sub-pixel are consistent, and the first blue sub-pixel and the second blue sub-pixel share one scan line.
  • the first thin film transistor and the second thin film transistor of the red sub-pixel, the green sub-pixel, and the first blue sub-pixel are all n-type;
  • the first thin film transistor of the second blue sub-pixel is p-type, and the second thin film transistor is n-type.
  • the first blue The first thin film transistor and the second thin film transistor of the sub-pixel are both turned on, and the first blue sub-pixel is in a light-emitting state; the first thin film transistor of the second blue sub-pixel is turned off, and the The second blue sub-pixel is in a resting state;
  • the first blue sub-pixel of the first blue sub-pixel when the voltages of the scanning signals input by the first blue sub-pixel and the second blue sub-pixel are negative voltages, the first blue sub-pixel of the first blue sub-pixel When the thin film transistor is turned off, the first blue sub-pixel is in a resting state; the first thin film transistor of the second blue sub-pixel is turned on, and the second blue sub-pixel is in a light-emitting state; where M is positive Integer.
  • the OLED display panel provided by the present application provides two blue sub-pixels in one pixel unit and controls the data of the two blue sub-pixels.
  • the signal voltage or the scan signal voltage makes the two blue sub-pixels work alternately, that is, when one of the blue sub-pixels is in the light-emitting state, the other blue sub-pixel is in the resting state. Therefore, the problem of short service life of the blue sub-pixels of the display panel can be improved, and the color shift problem of the display panel can be improved.
  • the process is simple, which can avoid the reduction of the screen resolution, thereby enhancing the reliability of the OLED display panel.
  • FIG. 1 is a circuit diagram of a pixel structure of an OLED display panel provided by Embodiment 1 of the application;
  • 2A ⁇ 2B are waveform diagrams of pixel circuits of the OLED display panel provided in the first embodiment of the application;
  • FIG. 3 is a circuit diagram of the pixel structure of the OLED display panel provided in the second embodiment of the application.
  • 4A to 4B are waveform diagrams of pixel circuits of the OLED display panel provided in the second embodiment of the application;
  • FIG. 5 is a circuit diagram of a pixel structure of an OLED display panel provided in a third embodiment of the application.
  • 6A to 6B are waveform diagrams of pixel circuits of the OLED display panel provided in the third embodiment of the application.
  • the present application is directed to the existing OLED display panel, which has a technical problem that the blue sub-pixel has a short service life, which causes a difference in panel display. This embodiment can solve this defect.
  • the OLED display panel provided by the present application includes, but is not limited to, data lines, scan lines, and array-distributed pixel units fabricated on a base substrate; one pixel unit includes four sub-units Pixel, the sub-pixel includes a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, a second blue sub-pixel B2; the OLED display panel further includes a first power supply and a second power supply, the The first power supply is used to provide a first power supply high level VDD, and the second power supply is used to provide a second power supply low level VSS.
  • the first blue sub-pixel B1 includes an anode, a light-emitting layer and a cathode, and a first thin film transistor T41 responsible for controlling data signal writing, and a first thin film transistor T41 responsible for controlling the pixel current to achieve control.
  • the second thin film transistor T42 of the first blue sub-pixel B1 emits brightness and a storage capacitor Cst4.
  • the gate of the first thin film transistor T41 is connected to the scan line Scan-B1, the source of the first thin film transistor T41 is connected to the data line Date-B1, and the drain of the first thin film transistor T41 is connected in parallel
  • the drain of T42 is connected to the anode, and is connected to the second power supply low level VSS through the light-emitting layer and the cathode;
  • the second plate of the storage capacitor Cst4 is connected to the anode and passes through the The light-emitting layer and the cathode are connected to the second power supply low level VSS.
  • the pixel circuit designs of the red sub-pixel R, the green sub-pixel G, the second blue sub-pixel B2 and the first blue sub-pixel B1 are similar, and will not be repeated here.
  • the scan signal transmitted by the scan line and the data signal transmitted by the data line are used to jointly cause the first blue sub-pixel B1 and the second blue sub-pixel B2 to alternately display.
  • two independent blue sub-pixels are arranged in one pixel unit, and the data signal voltage and/or scan signal voltage of the two blue sub-pixels are controlled to make the two blue sub-pixels work alternately and cooperatively. That is, when one of the blue sub-pixels is in the light-emitting state, the other blue sub-pixel is in the resting state. Therefore, the problem of short service life of the blue sub-pixels of the display panel can be improved, and the color shift problem of the display panel can be improved.
  • FIG. 1 it is a circuit diagram of the pixel structure of the OLED display panel provided in the first embodiment of this application.
  • the waveforms of the voltages of the scanning signals input by the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2 are all consistent , That is, the gate of the first thin film transistor T21 of the red subpixel R, the gate of the first thin film transistor T31 of the green subpixel G, and the gate of the first blue subpixel B1
  • the gate of the first thin film transistor T41 and the gate of the first thin film transistor T11 of the second blue sub-pixel B2 are both connected to a scan line Scan-B2/R/G/B1, which can be greatly reduced
  • the number of wiring on the panel increases the opening rate.
  • the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2 are respectively connected to one data line.
  • the second thin film transistor T22 of the red subpixel R, the second thin film transistor T32 of the green subpixel G, the second thin film transistor T42 of the first blue subpixel B1, the The sources of the second thin film transistor T12 of the second blue sub-pixel B2 are all connected to the first power supply high level VDD, and the drains are all connected to the second power supply low level VSS.
  • the first thin film transistor and the second thin film transistor of each sub-pixel are both N-type thin film transistors.
  • the first blue sub-pixel B1 and the second blue sub-pixel B2 at the same time, only one input valid data signal to make it emit light normally; the other input low level to make the sub-pixel
  • the second thin film transistor is under a low-level stress condition, so that the sub-pixel can stop.
  • the voltage of the scan signal input by the scan line Scan-B2/R/G/B1 is high Level, the first thin film transistor of each sub-pixel is turned on; the voltage of the data signal input by the data line Date-B2 connected to the second blue sub-pixel B2 is continuously at a low level , The second thin film transistor T12 of the second blue sub-pixel B2 is turned off, and the second blue sub-pixel B2 is in a resting state; the data line Date- to which the first blue sub-pixel B1 is connected The voltage of the data signal input by B1 is at a high level, the second thin film transistor T42 of the first blue sub-pixel B1 is turned on, and the first blue sub-pixel B1 is in a light-emitting state.
  • the voltages of the data signals input by the red sub-pixel R and the green sub-pixel G are both at a high level, that is, the red sub-pixel R, the green sub-pixel G, and the first blue sub-pixel G are at the same time.
  • the color sub-pixel B1 is in a light-emitting state.
  • the voltage of the data signal input by the second blue subpixel B2 is at a high level, and the second blue subpixel B2
  • the second thin film transistor T12 is turned on, the second blue sub-pixel B2 is in a light-emitting state; the voltage of the data signal input by the first blue sub-pixel B1 is at a low level, and the first blue
  • the second thin film transistor T42 of the color sub-pixel B1 is turned off, and the first blue sub-pixel B1 is in a resting state. That is, the red sub-pixel R, the green sub-pixel G, and the second blue sub-pixel B2 are in a light-emitting state at the same time.
  • the sub-pixels of this embodiment input the same scanning signal voltage, and by controlling the voltage of the data signal input by the two blue sub-pixels, the two blue sub-pixels work alternately and cooperatively, thereby improving the blueness of the display panel.
  • the shorter life span of the color sub-pixels improves the color cast of the display panel.
  • FIG. 3 it is a circuit diagram of the pixel structure of the OLED display panel provided in the second embodiment of this application.
  • the difference between this embodiment and the first embodiment above is:
  • the first blue sub-pixel B1 and the second blue sub-pixel B2 share a data line Date-B2/B1, the red sub-pixel R is correspondingly connected to a data line Date-R, and the green sub-pixel G Correspondingly connect a data line Date-G.
  • the first blue sub-pixel B1 is correspondingly connected to a scan line Scan-B1
  • the second blue sub-pixel B2 is correspondingly connected to a scan line Scan-B2
  • the red sub-pixel R is shared with the green sub-pixel G One scan line Scan-R/G.
  • the voltages of the scanning signals input by the red sub-pixel R and the green sub-pixel G are positive voltages; the scanning signals input by the first blue sub-pixel B1 and the second blue sub-pixel B2 One of the signal voltages is a positive voltage and the other is a negative voltage; the voltage of the scan signal of both the first blue sub-pixel B1 and the second blue sub-pixel B2 is alternately with the voltage of the red sub-pixel
  • the voltage waveforms of the scanning signals of the pixel R and the green sub-pixel G are the same.
  • the voltages of the scanning signals input by the red subpixel R, the green subpixel G, and the first blue subpixel B1 are all Positive voltage
  • the voltage of the scan signal input by the second blue sub-pixel B2 is a negative voltage
  • the first thin film transistor T11 of the second blue sub-pixel B2 is turned off
  • the second blue sub-pixel B2 is turned off.
  • the pixel B2 is in a resting state; the first thin film transistor T41 of the first blue sub-pixel B1 is turned on, that is, the red sub-pixel R, the green sub-pixel G, and the first blue sub-pixel B1 are all In a light-emitting state.
  • the voltages of the scanning signals input by the red sub-pixel R, the green sub-pixel G, and the second blue sub-pixel B2 Is a positive voltage
  • the first thin film transistors of the red sub-pixel R, the green sub-pixel G, and the second blue sub-pixel B2 are all turned on, that is, the red sub-pixel R, the green sub-pixel G.
  • the second blue sub-pixel B2 is in a light-emitting state
  • the voltage of the scanning signal input by the first blue sub-pixel B1 is a negative voltage
  • the first blue sub-pixel B1 has a negative voltage.
  • a thin film transistor T41 is turned off, and the first blue sub-pixel B1 is in a resting state.
  • the voltage of the scan signal input by only one of the two blue sub-pixels is consistent with the voltage of the scan signal input by the red sub-pixel R and the green sub-pixel G, so that the two blue sub-pixels Only one of the color sub-pixels can input a valid data signal, so that the two blue sub-pixels can alternately work together to improve the short lifespan of the blue sub-pixels of the display panel, thereby improving the color cast of the display panel .
  • FIG. 5 it is a circuit diagram of the pixel structure of the OLED display panel provided in the third embodiment of this application.
  • the difference between this embodiment and the first embodiment above is:
  • the red sub-pixel R and the green sub-pixel G have the same scan signal voltage waveform, that is, the red sub-pixel R and the green sub-pixel G share one scan line Scan-R/G;
  • the waveforms of the voltages of the scanning signals of the first blue sub-pixel B1 and the second blue sub-pixel B2 are the same, that is, the first blue sub-pixel B1 and the second blue sub-pixel B2 share one channel
  • the scan line Scan-B2/B1 in other words, the scan signals input to the first blue sub-pixel B1 and the second blue sub-pixel B2 are consistent.
  • the first thin film transistor T41 and the second thin film transistor T42 are both n-type; the first thin film transistor T11 of the second blue sub-pixel B2 is p-type, and the second thin film transistor T12 is n-type.
  • the first blue sub-pixel B1 and the second blue sub-pixel B2 share a data line Date-B2/B1
  • the red sub-pixel R is correspondingly connected to a data line Date-R
  • the pixel G is correspondingly connected to a data line Date-G.
  • the first thin film transistor T41 and the second thin film transistor T42 of the first blue sub-pixel B1 are both turned on, that is, the red sub-pixel R, the green sub-pixel G, and the first blue sub-pixel B1 is in a light-emitting state; the first thin film transistor T11 of the second blue sub-pixel B2 is turned off, and the second blue sub-pixel B2 is in a resting state.
  • the thin film transistor of the second blue sub-pixel B2 when two blue sub-pixels input the same scanning signal voltage, only one of them can input a valid data signal, so that the two blue sub-pixels can input valid data signals.
  • the color sub-pixels alternately work together to improve the short service life of the blue sub-pixels of the display panel, thereby improving the color shift of the display panel.
  • the thin film transistor of the first blue sub-pixel B1 can also be designed, as long as one of the two blue sub-pixels emits light at the same time.
  • the OLED display panel provided by the present application, two blue sub-pixels are arranged in one pixel unit, and the data signal voltage or scan signal voltage of the two blue sub-pixels is controlled to make two blue sub-pixels.
  • the sub-pixels work alternately, that is, when one blue sub-pixel is in a light-emitting state, the other blue sub-pixel is in a resting state. Therefore, the problem of short service life of the blue sub-pixels of the display panel can be improved, and the color shift problem of the display panel can be improved.
  • the process is simple, which can avoid the reduction of the screen resolution, thereby enhancing the reliability of the OLED display panel.

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Abstract

本申请提供一种OLED显示面板，包括数据线、扫描线以及像素单元，一像素单元包括红色子像素、绿色子像素、第一蓝色子像素、第二蓝色子像素；每个子像素均包括第一薄膜晶体管与第二薄膜晶体管；其中，扫描线所传输的扫描信号和数据线所传输的数据信号用于共同使得第一蓝色子像素和第二蓝色子像素交替显示。

Description

一种OLED显示面板 技术领域
本申请涉及显示技术领域，尤其涉及一种OLED显示面板。
 背景技术
OLED即有机发光二极管(Organic Light-Emitting Diode)，传统子像素排列采用RGB子像素面积相等、相互间隔的形式；另一种排列方式为Pentile排列，特点为相邻子像素会借用（共享）相邻的像素来构成三基色，以此来用低分辨率模拟高分辨率。LG display 4K面板技术，在RGB的基础上增设了白光子像素，构成了RGBW的像素结构，增加的白色子像素，使显示应用上更为灵活。
实际上，RGB三种有机发光材料的特性差异较大，通常，蓝色发光材料最不稳定、且存在发光寿命最短的问题。因为OLED亮度与电流呈正相关，蓝色发光材料不稳定会导致等电流变化量下蓝色子像素亮度变化量最大，从而导致色偏。传统的RGB子像素等面积的结构，无法更好地弥补因材料差异而产生的显示差异。Pentile排列在显示精细内容时，清晰度会大幅下降。RGBW的架构，工艺制程更复杂，开口率、面板走线难度更大。
因此，现有技术存在缺陷，急需改进。
 技术问题
本申请提供一种OLED显示面板，能够改善蓝色子像素使用寿命以及显示效果，同时避免造成工艺难度的提升以及屏幕分辨率的降低，从而增强OLED显示面板的可靠性。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请提供一种OLED显示面板，包括数据线、扫描线以及阵列分布的像素单元，一所述像素单元包括四个子像素，所述子像素包括红色子像素、绿色子像素、第一蓝色子像素、第二蓝色子像素；
所述OLED显示面板还包括第一电源和第二电源，所述第一电源用于提供第一电源高电平，所述第二电源用于提供第二电源低电平，每个所述子像素均包括第一薄膜晶体管、第二薄膜晶体管以及存储电容；
所述第一薄膜晶体管的栅极连接所述扫描线，所述第一薄膜晶体管的源极连接所述数据线，所述第一薄膜晶体管的漏极并联连接所述第二薄膜晶体管的栅极以及所述存储电容的第一极板；
所述第二薄膜晶体管的源极接入所述第一电源，所述第二薄膜晶体管的漏极接入所述第二电源；
所述存储电容的第二极板接入所述第二电源；
其中，所述扫描线所传输的扫描信号和所述数据线所传输的数据信号用于共同使得所述第一蓝色子像素和所述第二蓝色子像素交替显示。
在本申请的OLED显示面板中，每个所述子像素的所述扫描信号电压的波形一致。
在本申请的OLED显示面板中，所述第一蓝色子像素和所述第二蓝色子像素分别对应连接一路所述数据线。
在本申请的OLED显示面板中，第M帧时，所述第二蓝色子像素输入的所述数据信号的电压持续处于低电平，所述第二蓝色子像素的所述第二薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述数据信号电压处于高电平，所述第一蓝色子像素的所述第二薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
第M+1帧时，所述第二蓝色子像素输入的所述数据信号电压处于高电平，所述第二蓝色子像素的所述第二薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述数据信号电压处于低电平，所述第一蓝色子像素的所述第二薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
在本申请的OLED显示面板中，所述红色子像素与所述绿色子像素的所述扫描信号的电压为正电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压一者为正电压，一者为负电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压交替地与所述红色子像素以及所述绿色子像素的所述扫描信号的电压波形一致。
在本申请的OLED显示面板中，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述数据线，且两者分别独立连接一路所述扫描线；所述红色子像素与所述绿色子像素共用一路所述扫描线。
在本申请的OLED显示面板中，第M帧时，所述第二蓝色子像素输入的所述扫描信号的电压为负电压，所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述扫描信号的电压为正电压，所述第一蓝色子像素的所述第一薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
第M+1帧时，所述第二蓝色子像素输入的所述扫描信号的电压为正电压，所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述扫描信号的电压为负电压，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
在本申请的OLED显示面板中，所述红色子像素与所述绿色子像素的所述扫描信号的电压波形一致，所述红色子像素与所述绿色子像素共用一路所述扫描线；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压波形一致，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述扫描线。
在本申请的OLED显示面板中，所述红色子像素、所述绿色子像素、所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均为n型；所述第二蓝色子像素的所述第一薄膜晶体管为p型，所述第二薄膜晶体管为n型。
在本申请的OLED显示面板中，第M帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为正电压时，所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均打开，所述第一蓝色子像素处于发光状态；所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；
第M+1帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为负电压时，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；其中，M为正整数。
为解决上述问题，本申请还提供一种OLED显示面板，包括数据线、扫描线以及阵列分布的像素单元，一所述像素单元包括四个子像素，所述子像素包括红色子像素、绿色子像素、第一蓝色子像素、第二蓝色子像素；
所述OLED显示面板还包括第一电源和第二电源，每个所述子像素均包括第一薄膜晶体管、第二薄膜晶体管以及存储电容；
所述第一薄膜晶体管的栅极连接所述扫描线，所述第一薄膜晶体管的源极连接所述数据线，所述第一薄膜晶体管的漏极并联连接所述第二薄膜晶体管的栅极以及所述存储电容的第一极板；
所述第二薄膜晶体管的源极接入所述第一电源，所述第二薄膜晶体管的漏极接入所述第二电源；
所述存储电容的第二极板接入所述第二电源；
其中，所述扫描线所传输的扫描信号和所述数据线所传输的数据信号用于共同使得所述第一蓝色子像素和所述第二蓝色子像素交替显示。
在本申请的OLED显示面板中，每个所述子像素的所述扫描信号电压的波形一致。
在本申请的OLED显示面板中，所述第一蓝色子像素和所述第二蓝色子像素分别对应连接一路所述数据线。
在本申请的OLED显示面板中，第M帧时，所述第二蓝色子像素输入的所述数据信号的电压持续处于低电平，所述第二蓝色子像素的所述第二薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述数据信号电压处于高电平，所述第一蓝色子像素的所述第二薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
第M+1帧时，所述第二蓝色子像素输入的所述数据信号电压处于高电平，所述第二蓝色子像素的所述第二薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述数据信号电压处于低电平，所述第一蓝色子像素的所述第二薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
在本申请的OLED显示面板中，所述红色子像素与所述绿色子像素的所述扫描信号的电压为正电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压一者为正电压，一者为负电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压交替地与所述红色子像素以及所述绿色子像素的所述扫描信号的电压波形一致。
在本申请的OLED显示面板中，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述数据线，且两者分别独立连接一路所述扫描线；所述红色子像素与所述绿色子像素共用一路所述扫描线。
在本申请的OLED显示面板中，第M帧时，所述第二蓝色子像素输入的所述扫描信号的电压为负电压，所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述扫描信号的电压为正电压，所述第一蓝色子像素的所述第一薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
第M+1帧时，所述第二蓝色子像素输入的所述扫描信号的电压为正电压，所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述扫描信号的电压为负电压，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
在本申请的OLED显示面板中，所述红色子像素与所述绿色子像素的所述扫描信号的电压波形一致，所述红色子像素与所述绿色子像素共用一路所述扫描线；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压波形一致，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述扫描线。
在本申请的OLED显示面板中，所述红色子像素、所述绿色子像素、所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均为n型；所述第二蓝色子像素的所述第一薄膜晶体管为p型，所述第二薄膜晶体管为n型。
在本申请的OLED显示面板中，第M帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为正电压时，所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均打开，所述第一蓝色子像素处于发光状态；所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；
第M+1帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为负电压时，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；其中，M为正整数。
 有益效果
本申请的有益效果为：相较于现有的OLED显示面板，本申请提供的OLED显示面板，通过在一个像素单元中设置两个蓝色子像素，并通过控制两个蓝色子像素的数据信号电压或扫描信号电压，使得两个蓝色子像素进行交替工作，即其中一个蓝色子像素处于发光状态时，另一个蓝色子像素处于停息状态。从而可以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。同时，工艺制程简单，能够避免造成屏幕分辨率的降低，从而增强OLED显示面板的可靠性。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例一提供的OLED显示面板的像素结构电路图；
图2A~2B为本申请实施例一提供的OLED显示面板的像素电路波形图；
图3为本申请实施例二提供的OLED显示面板的像素结构电路图；
图4A~4B为本申请实施例二提供的OLED显示面板的像素电路波形图；
图5为本申请实施例三提供的OLED显示面板的像素结构电路图；
图6A~6B为本申请实施例三提供的OLED显示面板的像素电路波形图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请针对现有的OLED显示面板，存在蓝色子像素使用寿命短，从而造成面板显示差异的技术问题，本实施例能够解决该缺陷。
参照图1、图3、图5所示，本申请提供的OLED显示面板包括但不限于制作于衬底基板上的数据线、扫描线以及阵列分布的像素单元；一所述像素单元包括四个子像素，所述子像素包括红色子像素R、绿色子像素G、第一蓝色子像素B1、第二蓝色子像素B2；所述OLED显示面板还包括第一电源和第二电源，所述第一电源用于提供第一电源高电平VDD，所述第二电源用于提供第二电源低电平VSS。
以其中的所述第一蓝色子像素B1为例进行说明，其包括阳极、发光层和阴极，以及一个负责控制数据信号写入的第一薄膜晶体管T41、一个负责控制像素电流大小以达到控制所述第一蓝色子像素B1发光亮度的第二薄膜晶体管T42以及一个存储电容Cst4。所述第一薄膜晶体管T41的栅极连接所述扫描线Scan-B1，所述第一薄膜晶体管T41的源极连接所述数据线Date-B1，所述第一薄膜晶体管T41的漏极并联连接所述第二薄膜晶体管T42的栅极以及所述存储电容Cst4的第一极板；所述第二薄膜晶体管T42的源极接入所述第一电源高电平VDD，所述第二薄膜晶体管T42的漏极连接所述阳极，并通过所述发光层及所述阴极接入所述第二电源低电平VSS；所述存储电容Cst4的第二极板连接所述阳极，并通过所述发光层及所述阴极接入所述第二电源低电平VSS。所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2与所述第一蓝色子像素B1的像素电路设计相似，此处不再赘述。
其中，所述扫描线所传输的扫描信号和所述数据线所传输的数据信号用于共同使得所述第一蓝色子像素B1和所述第二蓝色子像素B2交替显示。
本申请通过在一个像素单元中设置两个独立的蓝色子像素，并通过控制两个蓝色子像素的数据信号电压和/或扫描信号电压，使得两个蓝色子像素进行交替协同工作，即其中一个蓝色子像素处于发光状态时，另一个蓝色子像素处于停息状态。从而可以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。
具体如图1所示，为本申请实施例一提供的OLED显示面板的像素结构电路图。本实施例中，所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1以及所述第二蓝色子像素B2输入的所述扫描信号的电压的波形均一致，即所述红色子像素R的所述第一薄膜晶体管T21的栅极、所述绿色子像素G的所述第一薄膜晶体管T31的栅极、所述第一蓝色子像素B1的所述第一薄膜晶体管T41的栅极、所述第二蓝色子像素B2的所述第一薄膜晶体管T11的栅极均连接至一条扫描线Scan-B2/R/G/B1上，如此可大幅缩减面板走线的数量，提升开口率。
所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1、所述第二蓝色子像素B2分别对应连接一条所述数据线。所述红色子像素R的所述第二薄膜晶体管T22、所述绿色子像素G的所述第二薄膜晶体管T32、所述第一蓝色子像素B1的所述第二薄膜晶体管T42、所述第二蓝色子像素B2的所述第二薄膜晶体管T12的源极均接入所述第一电源高电平VDD，漏极均接入所述第二电源低电平VSS。
其中，每个所述子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均为N型薄膜晶体管。
对于所述第一蓝色子像素B1和所述第二蓝色子像素B2，同一时刻只有一者输入有效的所述数据信号使其正常发光；另一者输入低电平，使该子像素的所述第二薄膜晶体管处于低电平应力的条件下，从而该子像素得以停息。
结合图2A，以第N行（N为整数）像素单元为例，在第M帧（M为整数）时，所述扫描线Scan-B2/R/G/B1输入的扫描信号的电压处于高电平，每个所述子像素的所述第一薄膜晶体管均打开；所述第二蓝色子像素B2连接的所述数据线Date-B2输入的所述数据信号的电压持续处于低电平，所述第二蓝色子像素B2的所述第二薄膜晶体管T12关闭，所述第二蓝色子像素B2处于停息状态；所述第一蓝色子像素B1连接的所述数据线Date-B1输入的所述数据信号的电压处于高电平，所述第一蓝色子像素B1的所述第二薄膜晶体管T42打开，所述第一蓝色子像素B1处于发光状态。所述红色子像素R与所述绿色子像素G输入的所述数据信号的电压均处于高电平，即同一时刻下所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1处于发光状态。
结合图2B，所述第N行像素单元在第M+1帧时，所述第二蓝色子像素B2输入的所述数据信号的电压处于高电平，所述第二蓝色子像素B2的所述第二薄膜晶体管T12打开，所述第二蓝色子像素B2处于发光状态；所述第一蓝色子像素B1输入的所述数据信号的电压处于低电平，所述第一蓝色子像素B1的所述第二薄膜晶体管T42关闭，所述第一蓝色子像素B1处于停息状态。即同一时刻下所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2处于发光状态。
本实施例的所述子像素输入相同的扫描信号电压，并通过控制两个蓝色子像素输入的数据信号的电压，使得两个蓝色子像素进行交替协同工作，从而可以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。
如图3所示，为本申请实施例二提供的OLED显示面板的像素结构电路图。本实施例与上述实施例一的区别特征在于：
所述第一蓝色子像素B1和所述第二蓝色子像素B2共用一路数据线Date-B2/B1，所述红色子像素R对应连接一条数据线Date-R，所述绿色子像素G对应连接一条数据线Date-G。所述第一蓝色子像素B1对应连接一条扫描线Scan-B1，所述第二蓝色子像素B2对应连接一条扫描线Scan-B2，所述红色子像素R与所述绿色子像素G共用一条扫描线Scan-R/G。
即所述红色子像素R与所述绿色子像素G输入的所述扫描信号的电压为正电压；所述第一蓝色子像素B1和所述第二蓝色子像素B2输入的所述扫描信号的电压一者为正电压，一者为负电压；所述第一蓝色子像素B1和所述第二蓝色子像素B2两者的所述扫描信号的电压交替地与所述红色子像素R以及所述绿色子像素G的所述扫描信号的电压波形一致。
结合图4A所示，第N行像素单元在第M帧时，所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1输入的所述扫描信号的电压均为正电压，所述第二蓝色子像素B2输入的所述扫描信号的电压为负电压，所述第二蓝色子像素B2的所述第一薄膜晶体管T11关闭，所述第二蓝色子像素B2处于停息状态；所述第一蓝色子像素B1的所述第一薄膜晶体管T41打开，即所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1均处于发光状态。
结合图4B所示，第N行像素单元在第M+1帧时，所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2输入的所述扫描信号的电压为正电压，所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2的所述第一薄膜晶体管均打开，即所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2均处于发光状态；所述第一蓝色子像素B1输入的所述扫描信号的电压为负电压，所述第一蓝色子像素B1的所述第一薄膜晶体管T41关闭，所述第一蓝色子像素B1处于停息状态。
本实施例由于在同一时刻，两个蓝色子像素中只有一者输入的扫描信号的电压与所述红色子像素R及所述绿色子像素G输入的扫描信号的电压一致，使得两个蓝色子像素中只有一者可以输入有效的数据信号，从而使得两个蓝色子像素进行交替协同工作，以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。
如图5所示，为本申请实施例三提供的OLED显示面板的像素结构电路图。本实施例与上述实施例一的区别特征在于：
所述红色子像素R与所述绿色子像素G的所述扫描信号的电压的波形一致，即所述红色子像素R与所述绿色子像素G共用一路扫描线Scan-R/G；所述第一蓝色子像素B1和所述第二蓝色子像素B2的所述扫描信号的电压的波形一致，即所述第一蓝色子像素B1和所述第二蓝色子像素B2共用一路扫描线Scan-B2/B1，换句话说，也就是输入所述第一蓝色子像素B1和所述第二蓝色子像素B2的所述扫描信号一致。
其中，所述红色子像素R的第一薄膜晶体管T21和第二薄膜晶体管T22、所述绿色子像素G的第一薄膜晶体管T31和第二薄膜晶体管T32、所述第一蓝色子像素B1的第一薄膜晶体管T41和第二薄膜晶体管T42均为n型；所述第二蓝色子像素B2的第一薄膜晶体管T11为p型，第二薄膜晶体管T12为n型。
其中，所述第一蓝色子像素B1和所述第二蓝色子像素B2共用一路数据线Date-B2/B1，所述红色子像素R对应连接一条数据线Date-R，所述绿色子像素G对应连接一条数据线Date-G。
结合图6A所示，第N行像素单元在第M帧时，所述第一蓝色子像素B1与所述第二蓝色子像素B2输入的所述扫描信号的电压为正电压时，所述第一蓝色子像素B1的所述第一薄膜晶体管T41和所述第二薄膜晶体管T42均打开，即所述红色子像素R、所述绿色子像素G、所述第一蓝色子像素B1均处于发光状态；所述第二蓝色子像素B2的所述第一薄膜晶体管T11关闭，所述第二蓝色子像素B2处于停息状态。
结合图6B所示，第N行像素单元在第M+1帧时，所述第一蓝色子像素B1与所述第二蓝色子像素B2输入的所述扫描信号的电压为负电压时，所述第一蓝色子像素B1的所述第一薄膜晶体管T41关闭，所述第一蓝色子像素B1处于停息状态；所述第二蓝色子像素B2的所述第一薄膜晶体管T11打开，即所述红色子像素R、所述绿色子像素G、所述第二蓝色子像素B2均处于发光状态。
本实施例通过对所述第二蓝色子像素B2的薄膜晶体管进行设计，使得两个蓝色子像素输入相同的扫描信号电压时，只有一者可以输入有效的数据信号，从而使得两个蓝色子像素进行交替协同工作，以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。当然，也可以对所述第一蓝色子像素B1的薄膜晶体管进行设计，只要在同一时刻使得两个蓝色子像素中的一者发光即可。
综上所述，本申请提供的OLED显示面板，通过在一个像素单元中设置两个蓝色子像素，并通过控制两个蓝色子像素的数据信号电压或扫描信号电压，使得两个蓝色子像素进行交替工作，即其中一个蓝色子像素处于发光状态时，另一个蓝色子像素处于停息状态。从而可以改善显示面板的蓝色子像素使用寿命较短的问题，进而改善显示面板色偏问题。同时，工艺制程简单，能够避免造成屏幕分辨率的降低，从而增强OLED显示面板的可靠性。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种OLED显示面板，其包括数据线、扫描线以及阵列分布的像素单元，一所述像素单元包括四个子像素，所述子像素包括红色子像素、绿色子像素、第一蓝色子像素、第二蓝色子像素；
    所述OLED显示面板还包括第一电源和第二电源，所述第一电源用于提供第一电源高电平，所述第二电源用于提供第二电源低电平，每个所述子像素均包括第一薄膜晶体管、第二薄膜晶体管以及存储电容；
    所述第一薄膜晶体管的栅极连接所述扫描线，所述第一薄膜晶体管的源极连接所述数据线，所述第一薄膜晶体管的漏极并联连接所述第二薄膜晶体管的栅极以及所述存储电容的第一极板；
    所述第二薄膜晶体管的源极接入所述第一电源，所述第二薄膜晶体管的漏极接入所述第二电源；
    所述存储电容的第二极板接入所述第二电源；
    其中，所述扫描线所传输的扫描信号和所述数据线所传输的数据信号用于共同使得所述第一蓝色子像素和所述第二蓝色子像素交替显示。
  2. 根据权利要求1所述的OLED显示面板，其中，每个所述子像素的所述扫描信号电压的波形一致。
  3. 根据权利要求2所述的OLED显示面板，其中，所述第一蓝色子像素和所述第二蓝色子像素分别对应连接一路所述数据线。
  4. 根据权利要求3所述的OLED显示面板，其中，第M帧时，所述第二蓝色子像素输入的所述数据信号的电压持续处于低电平，所述第二蓝色子像素的所述第二薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述数据信号电压处于高电平，所述第一蓝色子像素的所述第二薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
    第M+1帧时，所述第二蓝色子像素输入的所述数据信号电压处于高电平，所述第二蓝色子像素的所述第二薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述数据信号电压处于低电平，所述第一蓝色子像素的所述第二薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
  5. 根据权利要求1所述的OLED显示面板，其中，所述红色子像素与所述绿色子像素的所述扫描信号的电压为正电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压一者为正电压，一者为负电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压交替地与所述红色子像素以及所述绿色子像素的所述扫描信号的电压波形一致。
  6. 根据权利要求5所述的OLED显示面板，其中，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述数据线，且两者分别独立连接一路所述扫描线；所述红色子像素与所述绿色子像素共用一路所述扫描线。
  7. 根据权利要求6所述的OLED显示面板，其中，第M帧时，所述第二蓝色子像素输入的所述扫描信号的电压为负电压，所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述扫描信号的电压为正电压，所述第一蓝色子像素的所述第一薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
    第M+1帧时，所述第二蓝色子像素输入的所述扫描信号的电压为正电压，所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述扫描信号的电压为负电压，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
  8. 根据权利要求1所述的OLED显示面板，其中，所述红色子像素与所述绿色子像素的所述扫描信号的电压波形一致，所述红色子像素与所述绿色子像素共用一路所述扫描线；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压波形一致，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述扫描线。
  9. 根据权利要求8所述的OLED显示面板，其中，所述红色子像素、所述绿色子像素、所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均为n型；所述第二蓝色子像素的所述第一薄膜晶体管为p型，所述第二薄膜晶体管为n型。
  10. 根据权利要求9所述的OLED显示面板，其中，第M帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为正电压时，所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均打开，所述第一蓝色子像素处于发光状态；所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；
    第M+1帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为负电压时，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；其中，M为正整数。
  11. 一种OLED显示面板，其包括数据线、扫描线以及阵列分布的像素单元，一所述像素单元包括四个子像素，所述子像素包括红色子像素、绿色子像素、第一蓝色子像素、第二蓝色子像素；
    所述OLED显示面板还包括第一电源和第二电源，每个所述子像素均包括第一薄膜晶体管、第二薄膜晶体管以及存储电容；
    所述第一薄膜晶体管的栅极连接所述扫描线，所述第一薄膜晶体管的源极连接所述数据线，所述第一薄膜晶体管的漏极并联连接所述第二薄膜晶体管的栅极以及所述存储电容的第一极板；
    所述第二薄膜晶体管的源极接入所述第一电源，所述第二薄膜晶体管的漏极接入所述第二电源；
    所述存储电容的第二极板接入所述第二电源；
    其中，所述扫描线所传输的扫描信号和所述数据线所传输的数据信号用于共同使得所述第一蓝色子像素和所述第二蓝色子像素交替显示。
  12. 根据权利要求11所述的OLED显示面板，其中，每个所述子像素的所述扫描信号电压的波形一致。
  13. 根据权利要求12所述的OLED显示面板，其中，所述第一蓝色子像素和所述第二蓝色子像素分别对应连接一路所述数据线。
  14. 根据权利要求13所述的OLED显示面板，其中，第M帧时，所述第二蓝色子像素输入的所述数据信号的电压持续处于低电平，所述第二蓝色子像素的所述第二薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述数据信号电压处于高电平，所述第一蓝色子像素的所述第二薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
    第M+1帧时，所述第二蓝色子像素输入的所述数据信号电压处于高电平，所述第二蓝色子像素的所述第二薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述数据信号电压处于低电平，所述第一蓝色子像素的所述第二薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
  15. 根据权利要求11所述的OLED显示面板，其中，所述红色子像素与所述绿色子像素的所述扫描信号的电压为正电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压一者为正电压，一者为负电压；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压交替地与所述红色子像素以及所述绿色子像素的所述扫描信号的电压波形一致。
  16. 根据权利要求15所述的OLED显示面板，其中，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述数据线，且两者分别独立连接一路所述扫描线；所述红色子像素与所述绿色子像素共用一路所述扫描线。
  17. 根据权利要求16所述的OLED显示面板，其中，第M帧时，所述第二蓝色子像素输入的所述扫描信号的电压为负电压，所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；所述第一蓝色子像素输入的所述扫描信号的电压为正电压，所述第一蓝色子像素的所述第一薄膜晶体管打开，所述第一蓝色子像素处于发光状态；
    第M+1帧时，所述第二蓝色子像素输入的所述扫描信号的电压为正电压，所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；所述第一蓝色子像素输入的所述扫描信号的电压为负电压，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；其中，M为正整数。
  18. 根据权利要求11所述的OLED显示面板，其中，所述红色子像素与所述绿色子像素的所述扫描信号的电压波形一致，所述红色子像素与所述绿色子像素共用一路所述扫描线；所述第一蓝色子像素和所述第二蓝色子像素的所述扫描信号的电压波形一致，所述第一蓝色子像素和所述第二蓝色子像素共用一路所述扫描线。
  19. 根据权利要求18所述的OLED显示面板，其中，所述红色子像素、所述绿色子像素、所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均为n型；所述第二蓝色子像素的所述第一薄膜晶体管为p型，所述第二薄膜晶体管为n型。
  20. 根据权利要求19所述的OLED显示面板，其中，第M帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为正电压时，所述第一蓝色子像素的所述第一薄膜晶体管和所述第二薄膜晶体管均打开，所述第一蓝色子像素处于发光状态；所述第二蓝色子像素的所述第一薄膜晶体管关闭，所述第二蓝色子像素处于停息状态；
    第M+1帧时，所述第一蓝色子像素与所述第二蓝色子像素输入的所述扫描信号的电压为负电压时，所述第一蓝色子像素的所述第一薄膜晶体管关闭，所述第一蓝色子像素处于停息状态；所述第二蓝色子像素的所述第一薄膜晶体管打开，所述第二蓝色子像素处于发光状态；其中，M为正整数。
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Publication number Priority date Publication date Assignee Title
CN101984487A (zh) * 2010-11-02 2011-03-09 友达光电股份有限公司 主动式矩阵有机发光二极管显示面板的驱动方法
CN103927973A (zh) * 2013-12-25 2014-07-16 上海中航光电子有限公司 一种显示面板及其像素驱动方法
CN206353536U (zh) * 2016-12-29 2017-07-25 长春海谱润斯科技有限公司 一种有机发光显示面板及显示装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101984487A (zh) * 2010-11-02 2011-03-09 友达光电股份有限公司 主动式矩阵有机发光二极管显示面板的驱动方法
CN103927973A (zh) * 2013-12-25 2014-07-16 上海中航光电子有限公司 一种显示面板及其像素驱动方法
CN206353536U (zh) * 2016-12-29 2017-07-25 长春海谱润斯科技有限公司 一种有机发光显示面板及显示装置

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