WO2015018153A1 - 显示面板及其驱动方法、显示装置 - Google Patents

显示面板及其驱动方法、显示装置 Download PDF

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Publication number
WO2015018153A1
WO2015018153A1 PCT/CN2013/088861 CN2013088861W WO2015018153A1 WO 2015018153 A1 WO2015018153 A1 WO 2015018153A1 CN 2013088861 W CN2013088861 W CN 2013088861W WO 2015018153 A1 WO2015018153 A1 WO 2015018153A1
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Prior art keywords
pixel
sub
display panel
pixels
epd
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Ceased
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PCT/CN2013/088861
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English (en)
French (fr)
Inventor
张春兵
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Priority to US14/369,462 priority Critical patent/US9368062B2/en
Publication of WO2015018153A1 publication Critical patent/WO2015018153A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/828—Transparent cathodes, e.g. comprising thin metal layers
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/351—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/44—Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/52—RGB geometrical arrangements
    • 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
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2300/0439—Pixel structures
    • G09G2300/046—Pixel structures with an emissive area and a light-modulating area combined in one pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/023—Power management, e.g. power saving using energy recovery or conservation
    • 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
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a display panel and a driving method thereof, and a display device provided with the display panel.
  • AMOLED Active Matrix Organic Light Emitting Diode
  • OLED organic light-emitting diode
  • OLED organic light-emitting diode
  • the inventors have found that the existing AMOLED is a self-illuminating display device, which has high energy consumption and is difficult to meet the current energy saving requirements for the display device.
  • the embodiment of the invention provides a display panel and a driving method thereof, and a display device provided with the display panel, which solves the technical problem that the existing AMOLED has high energy consumption and is difficult to meet the current energy saving requirements of the display device.
  • the present invention provides a display panel comprising a plurality of pixel units arranged in an array, each of the pixel units including an OLED sub-pixel and an electrophoretic display (EGP) sub-pixel.
  • a display panel comprising a plurality of pixel units arranged in an array, each of the pixel units including an OLED sub-pixel and an electrophoretic display (EGP) sub-pixel.
  • EDP electrophoretic display
  • the number of the OLED sub-pixels is three, and the EPD The number of sub-pixels is one.
  • three OLED sub-pixels and one EPD sub-pixel in each of the pixel units are arranged in a square shape or in a linear arrangement.
  • the OLED sub-pixel includes an anode, a hole transport layer, a light-emitting layer, an electron transport layer, and a cathode which are sequentially stacked.
  • anode and/or the cathode are both transparent conductive materials.
  • the EPD sub-pixel includes a first electrode, a second electrode, and a microcapsule or microcup disposed between the first electrode and the second electrode.
  • the display panel includes an upper substrate and a lower substrate, and the plurality of pixel units arranged in an array are disposed between the upper substrate and the lower substrate, and the upper substrate and/or the lower substrate are flexible transparent substrates.
  • the three OLED sub-pixels in the pixel unit are respectively a red OLED sub-pixel, a green OLED sub-pixel and a blue OLED sub-pixel; and one of the pixel units is a black-and-white EPD sub-pixel.
  • the present invention also provides a display device comprising the above display panel.
  • the display device is further provided with a light source for providing light to the EPD sub-pixel when the external light is weak.
  • the present invention also provides a driving method of the above display panel, comprising:
  • Determining a color to be displayed by the pixel unit if the color to be displayed by the pixel unit is the same as the color of the EPD sub-pixel, driving the EPD sub-pixel to display; otherwise, driving the OLED sub-pixel to display.
  • Each pixel unit of the display panel includes three OLED sub-pixels and one EPD sub-pixel, and the three OLED sub-pixels are a red OLED sub-pixel, a green OLED sub-pixel, and a blue
  • the color to be displayed by the determining pixel unit includes:
  • the color to be displayed in the pixel unit is black and white.
  • the color to be displayed in the pixel unit is color
  • the red OLED sub-pixel, the green OLED sub-pixel, and the blue OLED sub-pixel are driven for display
  • the black-and-white EPD sub-pixel is driven to display black or white
  • the pixel unit is required to display
  • the color is black and white.
  • the black and white EPD sub-pixels are driven for display, the three OLED sub-pixels are not driven.
  • an OLED sub-pixel and an EPD sub-pixel are included in one pixel unit.
  • EPD sub-pixels are commonly used in electronic paper (E-paper), do not need to use a backlight, can reflect the ambient light to display black and white images, and can retain the original gray display without continuous power-on Degree, compared to OLED sub-pixels, its power consumption is very low.
  • the display panel provided by the present invention displays an image
  • the part of the color image may be displayed by the OLED sub-pixel in the part of the pixel unit; Displayed by EPD sub-pixels in this portion of the pixel unit.
  • the display panel and the driving method thereof provided by the present invention can display the portion of the black and white image in the image by using the lower EPD sub-pixels, and do not need all the OLED sub-pixels with relatively high power consumption to participate in the display. , thereby reducing the power consumption used for display, and meeting the current energy saving requirements for the display panel.
  • FIG. 1 is a schematic plan view of a display panel according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention.
  • FIG. 3 is another schematic cross-sectional view of a display panel according to an embodiment of the present invention.
  • the display panel provided by the embodiment of the present invention includes a plurality of pixel units 20 arranged in an array, and each of the pixel units 20 includes an OLED sub-pixel 3 and an electrophoretic display (electrophoretic display). Said EPD) sub-pixel 4.
  • the number of OLED sub-pixels 3 in each pixel unit 20 is three, and the three OLED sub-pixels are red (R) OLED sub-pixel, green (G) OLED sub-pixel, and blue (B), respectively.
  • the OLED sub-pixels that is, the OLED sub-pixels of the three most common red, green, and blue colors are described as an example in the present embodiment.
  • the EPD sub-pixels 4 are described by taking black and white EPD sub-pixels as an example. In other embodiments, other three color OLED sub-pixels may be selected, or a white (W) sub-pixel or a yellow (Y) sub-pixel may be added as the fourth color OLED sub-pixel. This embodiment is described by taking three OLED sub-pixels and one EPD sub-pixel as one pixel unit as an example. In other embodiments, one pixel unit may also be composed of three OLED sub-pixels and three EPD sub-pixels. The present invention does not limit the number of OLED sub-pixels and EPD sub-pixels in a pixel unit, and the pixel unit includes at least one OLED sub-pixel and at least one EPD sub-pixel.
  • each OLED sub-pixel 3 includes an anode 31, which is sequentially stacked, and a hole transport The layer 32, the light-emitting layer 33, the electron transport layer 34 and the cathode 35, and at least one thin film transistor (not shown) for driving the OLED sub-pixel 3.
  • the OLED sub-pixel 3 may further include an illuminating auxiliary layer such as a hole injection layer, an electron injection layer, a hole blocking layer, an electron blocking layer, and the like, and an optical auxiliary layer such as a light-scattering layer or a light-emitting enhancement layer.
  • Each of the EPD sub-pixels 4 includes a first electrode 51, a second electrode 52, and a microcapsule 40 disposed between the first electrode 51 and the second electrode 52.
  • the microcapsule 40 contains white charged particles and black charged
  • the oil solution of the particles, the first electrode 51 and the second electrode 52 cooperate to drive the EPD sub-pixel 4.
  • a microcup or other form of EPD sub-pixel may also be employed in the EPD sub-pixel 4.
  • the three OLED sub-pixels 3 and one EPD sub-pixel 4 may be arranged in a square shape (as shown in Fig. 1) or in a straight line (as shown in Fig. 2). Of course, in other embodiments, the three OLED sub-pixels and one EPD sub-pixel may also be arranged in a diamond shape or other manner according to actual conditions.
  • the shape and size of the OLED sub-pixel and the EPD sub-pixel are not specifically limited in the present invention.
  • the OLED sub-pixel and the EPD sub-pixel may be square, rectangular, equilateral, or other shapes, and the size of the OLED sub-pixel may be the same as the size of the EPD sub-pixel. , can also be different.
  • the arrangement of the OLED sub-pixels and the EPD sub-pixels in the pixel unit needs to take into consideration factors such as the number and size of the sub-pixels, and may be arranged in a square or a straight line, or may be arranged in other manners such as a triangle, a hexagon, a diamond, or the like.
  • one pixel unit 20 includes three OLED sub-pixels 3 and one EPD sub-pixel 4 of different colors.
  • the EPD sub-pixel 4 is generally used in an electronic paper (E-paper), which does not require a backlight, and can display black and white images by reflecting ambient light, and can retain the original display without continuously applying power. Gray scale, compared to the OLED sub-pixel 3, its power consumption is very low.
  • the display panel provided by the embodiment of the present invention displays an image
  • a part of the image is a color image and another part is a black and white image
  • the displayed image is a text with a color illustration, wherein the illustration part is Divided into color images, the rest of the text is black and white.
  • the portion of the color image may be displayed by the OLED sub-pixel 3 in the portion of the pixel unit 20.
  • the EPD sub-pixel 4 in the portion of the pixel unit 20 may display black, and In the continuous color display process, the EPD sub-pixel 4 does not need to be continuously powered, and the EPD sub-pixel 4 can also maintain the black display state; of course, the EPD sub-pixel 4 in the portion of the pixel unit 20 can also display white.
  • the portion of the black-and-white image can be displayed by the EPD sub-pixel 4 in the portion of the pixel unit 20, and without driving the OLED sub-pixel 3, the OLED sub-pixel 3 can be displayed in black without affecting the display of the EPD sub-pixel 4. . If the entire image is a black and white image, it can all be displayed by the EPD sub-pixel 4 in the pixel unit 20.
  • the display panel provided by the embodiment of the present invention can display the portion of the black and white image in the image by using the EPD sub-pixel 4 with relatively low power consumption, and does not need all the functions to participate in the display of the higher OLED sub-pixel 3. , thereby reducing the power consumption used for display, and meeting the current energy saving requirements for the display panel.
  • the black and white image in the image can also be displayed by the OLED sub-pixel 3 in this portion of the pixel unit 20.
  • the EPD sub-pixel in the pixel unit may also be one or more color EPD sub-pixels, and when the color of the pixel unit needs to be displayed is the same as the color of the EPD sub-pixel therein, the EPD sub-pixel can be used for display, and There is no need to drive the OLED sub-pixels, thereby reducing the power consumption used for display.
  • the display panel provided by the embodiment of the present invention includes an upper_1 ⁇ reverse 1 and a lower substrate 2, and a plurality of pixel units 20 arranged in an array are disposed on the upper substrate 1 and the lower substrate 2. between.
  • the OLED sub-pixel 3 is disposed on the lower substrate 2; the first electrode 51 of the EPD sub-pixel 4 is disposed on the lower substrate 2, and the second electrode 52 is disposed on the upper substrate 1.
  • the upper substrate and the lower substrate are base substrates, and do not include other film layers or elements formed on the upper substrate or the lower substrate.
  • the upper substrate 1 or the lower substrate 2 of the display panel may be a transparent substrate, that is, the display panel is a transparent display panel, which can be used for a transparent window, a transparent refrigerator door, and the like.
  • the anode 31 and the cathode 35 of the OLED sub-pixel 3 are each made of a transparent conductive material, so that the OLED sub-pixel 3 has light transmissivity.
  • the OLED sub-pixel 3 in the pixel unit 20 displays a graphic
  • the OLED sub-pixel 3 also has a certain transmittance, and can see the object behind the display panel through the displayed image; when the EPD sub-pixel in the pixel unit 20 When the pixel 4 is displayed, the OLED sub-pixel 3 does not display a color, and can more clearly see the displayed image to see things behind the display panel.
  • the anode 31 and the cathode 35 of the OLED sub-pixel 3 can also be prepared by using a translucent material having a low transmittance.
  • the anode can be prepared by using a completely transparent conductive material, and the cathode is translucent. Preparation of conductive materials.
  • the upper substrate 1 and the lower substrate 2 of the display panel are both flexible transparent substrates, that is, the display panel is a flexible display panel, and has a bendable characteristic, so that it can be conveniently applied to non-planar windows, glass doors and the like.
  • the manufacturing process of the display panel includes the fabrication of film layers and components on the lower substrate and the fabrication of film layers and components on the upper substrate.
  • the film layer and the component on the lower substrate are formed by first forming a gate line, a data line, and a thin film transistor (TFT) corresponding to each OLED sub-pixel on the lower substrate, and sequentially forming each OLED.
  • TFT thin film transistor
  • a first electrode corresponding to each EPD sub-pixel is then formed on the lower substrate to form an EPD sub-pixel.
  • the first electrode of the EPD sub-pixel may also be formed simultaneously with the anode of the OLED sub-pixel.
  • the film layer and the element on the upper substrate are fabricated by forming a second electrode corresponding to each EPD sub-pixel on the upper substrate. Because the second electrode is a transparent electrode, after depositing a second electrode on the upper substrate, the second electrode may not be etched, and the second electrode above the OLED sub-pixel is retained. It also does not affect the display effect of OLED sub-pixels.
  • the upper substrate on which the film layer and the element are formed is bonded to the lower substrate on which the film layer and the element are formed, and a plurality of pixel units arranged in an array are disposed between the upper substrate and the lower substrate.
  • An embodiment of the present invention further provides a driving method of the above display panel, including:
  • the driving method of the display panel of the present invention includes:
  • S1 determining the color to be displayed by the pixel unit, that is, determining whether the pixel unit is to display a color image or a black and white image, and specifically includes:
  • S11 Obtain the respective gray values of red, green, and blue among the components of the color to be displayed by the pixel unit. Because any color can be composed of red, green, and blue by different gray values, the combined colors of red, green, and blue can be used to determine the combined color;
  • the OLED sub-pixels in the pixel unit are other three or more colors, the gray values of the three or more colors should be acquired, and the gray values according to the combination thereof are obtained.
  • the proportional relationship determines the color to be displayed.
  • the red, green, and blue OLED sub-pixels are driven for display.
  • the driving EPD sub-pixel displays black, and has been displayed in continuous color.
  • the EPD sub-pixel does not need to be continuously powered, and the EPD sub-pixel can also maintain the black display state; of course, the EPD sub-pixel in the pixel unit can also display white;
  • the OLED sub-pixels in the pixel unit are other three or more colors, the OLED sub-pixels of the three or more colors should be driven for display.
  • the EPD sub-pixel is driven to display.
  • the OLED sub-pixel is not driven, so that the OLED sub-pixel is in a colorless transparent state, so that the display of the EPD sub-pixel is not affected, and the object behind the display panel can be seen through the OLED sub-pixel.
  • the display panel and the driving method thereof provided by the embodiments of the present invention can display portions of black and white images in an image by using EPD sub-pixels with relatively low power consumption, and do not need all the functions for the higher OLED sub-pixels. Participate in the display, which reduces the power consumption used for the display and meets the current energy saving requirements for the display panel.
  • the embodiment of the invention further provides a display device, which comprises the display panel provided by the above embodiment. Since the display device provided by the embodiment of the present invention has the same technical features as the display panel and the manufacturing method thereof provided by the embodiment of the present invention, the same technical effect can be produced and the same technical problem can be solved.
  • the display device is provided with a light source. Since the EPD sub-pixels are not self-illuminating, when the display device is in an environment at night or in other dark ambient light, the EPD sub-pixel can be more clearly displayed by using the light source provided inside the display device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种显示面板及其驱动方法、以及设有该显示面板的显示装置。显示面板包括呈阵列式设置的若干个像素单元（20），每个像素单元（20）包括OLED子像素（3）和EPD子像素（4）。本显示面板解决了现有的AMOLED能耗较高、难以满足节能要求的技术问题，可应用于透明橱窗、冰箱门等场景。

Description

显示面板及其驱动方法、 显示装置 技术领域
本发明属于显示技术领域， 具体涉及一种显示面板及其驱动方法， 以及设 有该显示面板的显示装置。
背景技术
随着显示技术的不断发展， 有源矩阵有机发光二极管面板（Active Matrix Organic Light Emitting Diode, 筒称 AMOLED )具有生产成本低、 视角宽、 响应 速度快等优点， 因此 AMOLED已经逐渐取代传统的液晶显示器。有机发光二极 管（OLED )利用电流驱动， 其工作原理是电子和空穴结合产生辐射光， 也就是 直接把电能转化为光能， 所以 AMOLED属于自发光的显示装置。
另一方面， 在全球气候变暖的今天， 低碳节能已经是世界各地讨论的重要 话题。 但是， 本发明人发现， 现有的 AMOLED属于自发光的显示装置， 能耗较 高， 难以满足当前对显示装置的节能要求。
发明内容
本发明实施例提供了一种显示面板及其驱动方法， 以及设有该显示面板的 显示装置， 解决了现有的 AMOLED能耗较高，难以满足当前对显示装置的节能 要求的技术问题。
为达到上述目的， 本发明的实施例采用如下技术方案：
本发明提供了一种显示面板， 包括呈阵列式设置的若干个像素单元， 每个 所述像素单元中包括 OLED子像素和电泳显示（Electrophoretic Displays, 筒称 EPD )子像素。
进一步，每个所述像素单元中，所述 OLED子像素的数量为三个，所述 EPD 子像素的数量为一个。
优选的， 每个所述像素单元中的三个 OLED子像素和一个 EPD子像素呈方 形排列或呈直线型排列。
进一步， 所述 OLED子像素包括依次层叠设置的阳极、 空穴传输层、 发光 层、 电子传输层和阴极。
进一步， 所述阳极和 /或所述阴极均为透明导电材料。
进一步， 所述 EPD子像素包括第一电极、 第二电极， 以及设置在第一电极 和第二电极之间的微胶嚢或微杯。
进一步， 所述显示面板包括上基板和下基板， 所述呈阵列式设置的若干个 像素单元设置在所述上基板和下基板之间， 所述上基板和 /或下基板为柔性透明 基板。
优选的， 所述像素单元中的三个 OLED子像素分别为红色 OLED子像素、 绿色 OLED子像素和蓝色 OLED子像素；所述像素单元中的一个 EPD子像素为 黑白 EPD子像素。
本发明还提供一种显示装置， 包括上述的显示面板。
优选的， 所述显示装置中还设有光源， 用于在外界光线较弱时给 EPD子像 素提供光线。
本发明还提供了上述显示面板的驱动方法， 包括：
判断像素单元所要显示的颜色； 若像素单元所要显示的颜色与所述 EPD子 像素的颜色相同， 则驱动所述 EPD子像素进行显示； 否则， 则驱动所述 OLED 子像素进行显示。
其中， 在显示面板的每个像素单元包括三个 OLED子像素和一个 EPD子像 素， 所述三个 OLED子像素分别为红色 OLED子像素、 绿色 OLED子像素和蓝 色 OLED子像素而 EPD子像素为黑白 EPD子像素时， 所述判断像素单元所要 显示的颜色包括：
获取像素单元所要显示的颜色的组成中， 红色、 绿色、 蓝色各自的灰度值； 如果红色、 绿色、 蓝色三个灰度值中存在两个不相等的灰度值， 则该像素 单元所要显示的颜色为彩色；
如果红色、 绿色、 蓝色三个灰度值全部相等， 则该像素单元所要显示的颜 色为黑白色。
进一步地， 在像素单元所要显示的颜色为彩色， 驱动红色 OLED子像素、 绿色 OLED子像素和蓝色 OLED子像素进行显示时，驱动黑白 EPD子像素显示 黑色或白色； 而在像素单元所要求显示的颜色为黑白色， 驱动黑白 EPD子像素 进行显示时， 不对三个 OLED子像素进行驱动。
与现有技术相比， 本发明所提供的上述技术方案具有如下优点： 本发明提 供的显示面板中， 一个像素单元中包括 OLED子像素和 EPD子像素。 EPD子像 素通常用于电子纸（Electronic Paper, 筒称 E-paper ) 中， 不需要利用背光源， 可以靠反射环境光来显示黑白图像， 而且不需要持续加电也能够保留住原先显 示的灰度， 相比于 OLED子像素， 其功耗非常低。 本发明提供的显示面板显示 图像时， 如果图像中一部分为彩色图像， 另一部分为黑白图像， 那么彩色图像 的部分， 可以由这一部分像素单元中的 OLED子像素来显示； 黑白图像的部分， 可以由这一部分像素单元中的 EPD子像素来显示。如果整个图像都是黑白图像， 则可以全部由像素单元中的 EPD子像素来显示。 因此， 本发明提供的显示面板 及其驱动方法， 能够利用功^ 目对较低的 EPD子像素来显示图像中黑白图像的 部分， 不需要全部的功耗相对较高的 OLED子像素都参与显示， 从而降低了显 示所用的功耗， 满足当前对显示面板的节能要求。 附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中所 需要使用的附图作筒单地介绍。
图 1为本发明的实施例所提供的显示面板的平面示意图；
图 2为本发明的实施例所提供的显示面板的截面示意图；
图 3为本发明的实施例所提供的显示面板的另一截面示意图。
具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清 楚、 完整的描述。
如图 1和图 2所示， 本发明实施例所提供的显示面板， 包括呈阵列式设置 的若干个像素单元 20, 每个像素单元 20 中包括 OLED子像素 3和电泳显示 ( Electrophoretic Displays, 筒称 EPD )子像素 4。 本实施例中， 每个像素单元 20中的 OLED子像素 3的数量为三个，三个 OLED子像素分别为红色（ R )OLED 子像素、 绿色 （G ) OLED子像素和蓝色 （B ) OLED子像素， 即本实施例以最 常见的红、 绿、 蓝三种颜色的 OLED子像素为例进行说明， EPD子像素 4以黑 白 EPD子像素为例进行说明。 在其他实施方式中， 也可以选用其他三种颜色的 OLED子像素， 或者还可以增加白色（W )子像素或黄色（Y )子像素作为第四 种颜色的 OLED子像素。本实施例以三个 OLED子像素和一个 EPD子像素组成 一个像素单元为例进行说明。 在其他实施方式中， 一个像素单元也可以由三个 OLED子像素和三个 EPD子像素组成。 本发明对于像素单元中 OLED子像素和 EPD子像素的数量不做限定， 像素单元包括至少一个 OLED子像素和至少一个 EPD子像素即可。
如图 3所示， 每个 OLED子像素 3包括依次层叠设置的阳极 31、 空穴传输 层 32、 发光层 33、 电子传输层 34和阴极 35, 以及至少一个薄膜晶体管 （图中 未示出）， 薄膜晶体管用于驱动 OLED子像素 3。 OLED子像素 3还可以包括空 穴注入层、 电子注入层、 空穴阻挡层、 电子阻挡层等发光辅助层和光散射层、 光出射增强层等光学辅助层。每个 EPD子像素 4包括第一电极 51、第二电极 52, 以及设置在第一电极 51和第二电极 52之间的微胶嚢 40,微胶嚢 40内为含有白 色带电粒子和黑色带电粒子的油溶液，第一电极 51与第二电极 52配合驱动 EPD 子像素 4。 在其他实施方式中， EPD子像素 4中也可以采用微杯或其他形式的 EPD子像素。
三个 OLED子像素 3和一个 EPD子像素 4可以呈方形排列 （如图 1所示）， 也可以呈直线型排列 （如图 2所示）。 当然， 在其他实施方式中三个 OLED子像 素和一个 EPD子像素也可以根据实际情况， 以菱形或其他方式进行排列。 本发 明对于 OLED子像素和 EPD子像素的形状大小不做具体限定， OLED子像素和 EPD子像素可以为正方形、 长方形、 正三角形或其他形状， OLED子像素的大 小与 EPD子像素的大小可以相同， 也可以不同。 OLED子像素和 EPD子像素在 像素单元中的排列需要考虑子像素的数量、 大小等因素， 通常可呈方形排列或 直线型排列， 也可以呈三角形、 六边形、 菱形等其他方式排列。
本发明实施例提供的显示面板中， 一个像素单元 20中包括三个不同颜色的 OLED子像素 3和一个 EPD子像素 4。 EPD子像素 4通常用于电子纸（ Electronic Paper, 筒称 E-paper )中， 不需要利用背光源， 可以靠反射环境光来显示黑白图 像，而且不需要持续加电也能够保留住原先显示的灰度,相比于 OLED子像素 3 , 其功耗非常低。
本发明实施例提供的显示面板显示图像时， 如果图像中一部分为彩色图像， 另一部分为黑白图像， 例如显示的图像为带有彩色插图的文字， 则其中插图部 分为彩色图像， 其余的文字部分为黑白图像。 彩色图像的部分， 可以由这一部 分像素单元 20中的 OLED子像素 3来显示，为了不影响 OLED子像素 3的显示 效果，这一部分像素单元 20中的 EPD子像素 4显示黑色即可， 而且在持续的彩 色显示过程中， 不需要对 EPD子像素 4持续加电， EPD子像素 4也能保持黑色 的显示状态； 当然， 这一部分像素单元 20中的 EPD子像素 4也可以显示白色。 黑白图像的部分，可以由这一部分像素单元 20中的 EPD子像素 4来显示， 同时 不对 OLED子像素 3进行驱动， 就可以使 OLED子像素 3显示为黑色， 而不影 响 EPD子像素 4的显示。 如果整个图像都是黑白图像， 则可以全部由像素单元 20中的 EPD子像素 4来显示。
因此， 本发明实施例提供的显示面板， 能够利用功耗相对较低的 EPD子像 素 4来显示图像中黑白图像的部分， 不需要全部的功^ 目对较高的 OLED子像 素 3都参与显示， 从而降低了显示所用的功耗， 满足当前对显示面板的节能要 求。
当然， 如果是在夜间或其他外界光线较暗的环境中， 图像中的黑白图像也 可以由这一部分像素单元 20中的 OLED子像素 3来显示。
此外，像素单元中的 EPD子像素也可以是一个或多个彩色 EPD子像素， 当 该像素单元需要显示的颜色与其中的 EPD 子像素的颜色相同时， 就可以利用 EPD子像素进行显示， 而不需要驱动 OLED子像素，从而降低显示所用的功耗。
进一步， 如图 2和图 3所示， 本发明实施例提供的显示面板包括上_1 ^反 1 和下基板 2, 呈阵列式设置的若干个像素单元 20设置在上基板 1和下基板 2之 间。 其中， OLED子像素 3设置在下基板 2上； EPD子像素 4的第一电极 51设 置在下基板 2上，第二电极 52设置在上基板 1上。上基板和下基板为衬底基板， 不包括形成在上基板或下基板上的其他膜层或元件。 作为一个优选方案， 显示面板的上基板 1或下基板 2可以为透明基板， 即 该显示面板为透明显示面板， 可用于透明橱窗、 透明冰箱门等场景。 进一步， OLED子像素 3的阳极 31和阴极 35均由透明导电材料制备，使 OLED子像素 3 具有透光性。 当像素单元 20中的 OLED子像素 3显示图形时， OLED子像素 3 还具有一定的透过率， 能够透过所显示的图像从而看到显示面板后面的事物； 当像素单元 20中的 EPD子像素 4显示时， OLED子像素 3不显示颜色， 而且能 够更清楚地透过所显示的图像从而看到显示面板后面的事物。 当然， 考虑到生 产成本和获得原材料困难， OLED子像素 3的阳极 31和阴极 35也可以采用透过 率较低的半透明材料制备， 通常阳极可采用完全透明的导电材料制备， 阴极采 用半透明的导电材料制备。
优选的， 显示面板的上基板 1和下基板 2均为柔性透明基板， 即该显示面 板为柔性显示面板， 具有可弯曲的特性， 从而能够方便的应用在非平面的橱窗、 玻璃门等场景。
该显示面板的制造过程包括下基板上的膜层和元件的制造和上基板上的膜 层和元件的制造。
下基板上的膜层和元件的制造过程为， 先在下基板上形成栅线、 数据线， 以及每个 OLED子像素对应的薄膜晶体管 （ Thin Film Transistor, 筒称 TFT ), 再依次形成每个 OLED子像素的阳极、 空穴传输层、 发光层、 电子传输层和阴 极。 然后在下基板上形成与每个 EPD子像素对应的第一电极，再形成 EPD子像 素。 EPD子像素的第一电极也可以与 OLED子像素的阳极同时形成。
上基板上的膜层和元件的制造过程为， 在上基板上形成与每个 EPD子像素 对应的第二电极。 因为第二电极为透明电极， 所以在上基板上沉积了一层第二 电极之后， 可以不对第二电极进行刻蚀， 保留 OLED子像素上方的第二电极， 也不会影响 OLED子像素的显示效果。
然后， 将形成有膜层和元件的上基板与形成有膜层和元件的下基板进行对 盒即可， 上基板和下基板之间为呈阵列式设置的若干个像素单元。
本发明的一个实施例还提供了上述显示面板的驱动方法， 包括：
S01: 判断像素单元所要显示的颜色； 以及
S02:若像素单元所要显示的颜色与所述 EPD子像素的颜色相同，则驱动所 述 EPD子像素进行显示； 否则， 则驱动所述 OLED子像素进行显示。
在显示面板中所包括的 EPD子像素是黑白 EPD子像素时，本发明的显示面 板的驱动方法， 包括：
S1 : 判断像素单元所要显示的颜色， 即确定像素单元所要显示的是彩色图 像还是黑白图像， 具体包括：
S11: 获取像素单元所要显示的颜色的组成中， 红色、 绿色、 蓝色各自的灰 度值。 因为任意颜色都可以由红色、 绿色、 蓝色按不同的灰度值组合而成， 所 以根据红色、 绿色、 蓝色各自的灰度值就能够判断出其组合而成的颜色；
S12: 如果红色、 绿色、 蓝色三个灰度值中存在两个不相等的灰度值， 则该 像素单元所要显示的颜色为彩色；
S13: 如果红色、 绿色、 蓝色三个灰度值全部相等， 则该像素单元所要显示 的颜色为黑白， 其中包括不同灰度的黑色、 白色和灰色；
在其他实施方式中， 如果像素单元中的 OLED子像素为其他的三种或更多 种颜色， 则应当获取该三种或更多种颜色各自的灰度值， 并根据其组合的灰度 值的比例关系判断所要显示的颜色。
S2: 若像素单元所要显示的颜色为彩色， 则驱动红色、绿色、 蓝色的 OLED 子像素进行显示。 同时， 驱动 EPD子像素显示黑色， 而且在持续的彩色显示过 程中， 不需要对 EPD子像素持续加电， EPD子像素也能保持黑色的显示状态； 当然， 该像素单元中的 EPD子像素也可以显示白色；
在其他实施方式中， 如果像素单元中的 OLED子像素为其他的三种或更多 种颜色， 则应当驱动该三种或更多种颜色的 OLED子像素进行显示。
S3: 若像素单元所要显示的颜色为黑白色， 则驱动 EPD子像素进行显示。 同时， 不对 OLED子像素进行驱动， 使 OLED子像素处于无色透明状态， 从而 不影响 EPD子像素的显示，还能够透过 OLED子像素看到显示面板后面的事物。
因此， 本发明实施例提供的显示面板及其驱动方法， 能够利用功耗相对较 低的 EPD子像素来显示图像中黑白图像的部分， 不需要全部的功^ 目对较高的 OLED子像素都参与显示，从而降低了显示所用的功耗，满足当前对显示面板的 节能要求。
本发明实施例还提供一种显示装置， 包括上述实施例所提供的显示面板。 由于本发明实施例提供的显示装置与上述本发明实施例所提供的显示面板 及其制造方法具有相同的技术特征， 所以也能产生相同的技术效果， 解决相同 的技术问题。
优选的， 该显示装置中设有光源。 由于 EPD子像素不能自发光， 所以当显 示装置处于夜间或其他外界光线较暗的环境中时， 可以利用显示装置内部设置 的光源使 EPD子像素能够更清晰的显示图像。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限于 此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到 的变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围 应以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种显示面板， 其特征在于：
所述显示面板包括呈阵列式设置的若干个像素单元， 每个所述像素单元中 包括 OLED子像素和 EPD子像素。
2、 根据权利要求 1所述的显示面板， 其特征在于： 每个所述像素单元中， 所述 OLED子像素的数量为三个， 所述 EPD子像素的数量为一个。
3、 根据权利要求 2所述的显示面板， 其特征在于： 每个所述像素单元中的 三个 OLED子像素和一个 EPD子像素呈方形排列或呈直线型排列。
4、根据权利要求 1至 3中任意一项所述的显示面板,其特征在于：所述 OLED 子像素包括依次层叠设置的阳极、 空穴传输层、 发光层、 电子传输层和阴极。
5、 根据权利要求 4所述的显示面板， 其特征在于： 所述阳极和 /或所述阴极 为透明导电材料。
6、根据权利要求 1至 5中任意一项所述的显示面板，其特征在于：所述 EPD 子像素包括第一电极、 第二电极， 以及设置在第一电极和第二电极之间的微胶 嚢或微杯。
7、 根据权利要求 1至 6中任意一项所述的显示面板， 其特征在于， 所述显 示面板包括上基板和下基板， 所述呈阵列式设置的若干个像素单元设置在所述 上基板和下基板之间， 所述上基板和 /或下基板为柔性透明基板。
8、 根据权利要求 2或 3所述的显示面板， 其特征在于： 所述像素单元中的 三个 OLED子像素分别为红色 OLED子像素、 绿色 OLED子像素和蓝色 OLED 子像素； 所述像素单元中的一个 EPD子像素为黑白 EPD子像素。
9、 一种显示装置， 其特征在于： 所述显示装置包括如权利要求 1-8任一项 所述的显示面板。
10、 根据权利要求 9 所述的显示装置， 其特征在于： 所述显示装置中还设 有光源， 用于在外界光线较弱时给 EPD子像素提供光线。
11、 一种权利要求 1至 7任一项所述的显示面板的驱动方法， 其特征在于， 包括：
判断像素单元所要显示的颜色；
若像素单元所要显示的颜色与所述 EPD 子像素的颜色相同， 则驱动所述 EPD子像素进行显示； 否则， 则驱动所述 OLED子像素进行显示。
12、 根据权利要求 11所述的显示面板的驱动方法， 其中显示面板的每个像 素单元包括三个 OLED子像素和一个 EPD子像素，所述三个 OLED子像素分别 为红色 OLED子像素、绿色 OLED子像素和蓝色 OLED子像素；所述 EPD子像 素为黑白 EPD子像素， 其特征在于， 所述判断像素单元所要显示的颜色的步骤 包括： 获取像素单元所要显示的颜色的组成中， 红色、 绿色、 蓝色各自的灰度值； 如果红色、 绿色、 蓝色三个灰度值中存在两个不相等的灰度值， 则该像素 单元所要显示的颜色为彩色； 如果红色、 绿色、 蓝色三个灰度值全部相等， 则该像素单元所要显示的颜 色为黑白色。
13、 根据权利要求 12所述的显示面板的驱动方法， 其特征在于， 还包括： 在像素单元所要显示的颜色为彩色， 驱动红色 OLED子像素、 绿色 OLED 子像素和蓝色 OLED子像素进行显示时，驱动黑白 EPD子像素显示黑色或白色； 以及
在像素单元所要显示的颜色为黑白色， 驱动黑白 EPD子像素进行显示时， 不对三个 OLED子像素进行驱动。
PCT/CN2013/088861 2013-08-09 2013-12-09 显示面板及其驱动方法、显示装置 Ceased WO2015018153A1 (zh)

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