WO2016192278A1 - 场序显示面板、场序显示装置及驱动方法 - Google Patents

场序显示面板、场序显示装置及驱动方法 Download PDF

Info

Publication number
WO2016192278A1
WO2016192278A1 PCT/CN2015/092682 CN2015092682W WO2016192278A1 WO 2016192278 A1 WO2016192278 A1 WO 2016192278A1 CN 2015092682 W CN2015092682 W CN 2015092682W WO 2016192278 A1 WO2016192278 A1 WO 2016192278A1
Authority
WO
WIPO (PCT)
Prior art keywords
light source
color
frame
light
field
Prior art date
Application number
PCT/CN2015/092682
Other languages
English (en)
French (fr)
Inventor
刘鹏
陈小川
董学
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/039,673 priority Critical patent/US10127850B2/en
Publication of WO2016192278A1 publication Critical patent/WO2016192278A1/zh

Links

Images

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
    • G09G3/34—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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/2003—Display of colours
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • G09G3/34—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
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • 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
    • G09G3/36—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 liquid crystals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • 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
    • 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
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination
    • 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 
    • G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • 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
    • G09G3/36—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 liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

Definitions

  • Embodiments of the present invention relate to a field sequential display panel, a field sequential display device, and a driving method.
  • one of the methods for realizing color display of a liquid crystal display device is a red (R), green (G), and blue (B) filter layer display method.
  • each pixel unit is divided into three RGB sub-pixels, and a filter layer of a corresponding color is provided for each sub-pixel, and light emitted from the backlight is transmitted to the liquid crystal to the An RGB color filter layer, thereby forming a color image.
  • the above RGB color filter layer reduces the transmittance of light emitted from the backlight, thereby reducing the luminous flux of the liquid crystal display device.
  • Embodiments of the present invention provide a field sequential display panel, a field sequential display device, and a driving method capable of reducing a response time to a liquid crystal response time when a color field sequential display method is employed.
  • a field sequential display panel including: a lower substrate including a substrate substrate and a plurality of pixel units disposed on the base substrate, each of the plurality of pixel units including a thin film transistor; a substrate; and a liquid crystal layer between the lower substrate and the upper substrate; an OLED light source disposed on a side of the base substrate away from the thin film transistor for each of the plurality of pixel units Providing three primary color lights, wherein the OLED light source comprises: a plurality of three primary color light source groups, each of the three primary color light source groups comprising a first color sub-light source, a second color sub-light source and a third color sub-light source, wherein the first color, the The second color and the third color are colors different from each other.
  • a field sequential display device comprising: a liquid crystal display panel comprising: an upper substrate and a lower substrate opposite to each other; and a liquid crystal layer disposed between the upper substrate and the lower substrate;
  • the liquid crystal display panel includes a plurality of pixel units, and an OLED light source is disposed on the light incident side of the liquid crystal display panel for providing three primary colors of light to each of the plurality of pixel units of the liquid crystal display panel, wherein the OLED
  • the light source comprises: a plurality of three primary color light source groups, and each of the three primary color light source groups A first color sub-light source, a second color sub-light source, and a third color sub-light source are included, wherein the first color, the second color, and the third color are colors different from each other.
  • a driving method of the field sequential display panel or the field sequential display device comprising: driving a first color sub-light source in the OLED light source to emit light in a first field sequence of the first frame Driving a second color sub-light source in the OLED light source in a second field sequence of the first frame; driving a third color sub-light source in the OLED light source to emit light in a first field sequence of the second frame, a second field sequence of the second frame driving the first color sub-light source in the OLED light source to emit light; a first field order of the second frame is adjacent to a second field order of the first frame; a first field sequence of the third frame, driving the second color sub-light source in the OLED light source to emit light, and driving the third color sub-light source in the OLED light source to emit light in a second field sequence of the third frame
  • the first field order of the third frame is adjacent to the second field order of the second frame; in each of the first field order and the second field order, driving the liquid crystal
  • a driving method of the above-mentioned field sequential display panel or field sequential display device comprising: driving a first color sub-light source in the OLED light source to emit light in a first field sequence of the first frame Driving a second color sub-light source in the OLED light source in a second field sequence of the first frame; driving a third color sub-light source in the OLED light source to emit light in a first field sequence of the second frame, a second field sequence of the second frame, driving the second color sub-light source in the OLED light source to emit light; a first field order of the second frame is adjacent to a second field order of the first frame;
  • Each sequence of steps drives the liquid crystal deflection in the liquid crystal layer such that each of the plurality of pixel units of the liquid crystal layer reaches a target luminance value; wherein the first frame and the first Two frames constitute a drive cycle.
  • FIG. 1a is a cross-sectional structural view of a field sequential display panel according to an embodiment of the present invention
  • FIG. 1b is a cross-sectional structural view of a field sequential display device according to an embodiment of the present invention.
  • 1c is a schematic diagram of a pixel unit in a liquid crystal display panel corresponding to a three primary color light source group in an OLED light source according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of field sequence division corresponding to a driving method according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of field sequence division corresponding to a driving method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of another field order division corresponding to a driving method according to an embodiment of the invention.
  • the color field sequential display method for realizing color display it is not necessary to provide an RGB color filter layer in the liquid crystal display device, but an RGB color LED lamp is set in each pixel unit of the display device, and the pixel unit corresponding is controlled in a time sharing manner.
  • the liquid crystal molecules deflect the preset angle, and control the RGB color LED light source to emit the R, G, and B primary color lights through the liquid crystal in time, so that the pixel unit displays the corresponding color value in one frame.
  • one frame time can be divided into three fields, and in one time, all the pixel units in the liquid crystal display can complete one scan, and when the liquid crystal flip angle matches the target transmittance, one The backlight of the color (eg red) is fully open.
  • LED lights of three colors of R, G, and B can be respectively illuminated. In this way, three different colors of light can form a color mixing effect within one frame, thereby forming a color image.
  • the color field sequential display method requires a high response speed of the liquid crystal, and the response time needs to be reduced to 1/3 of the RGB color filter method.
  • An embodiment of the present invention provides a field sequential display panel, as shown in FIG. 1a, including a lower substrate 102, an upper substrate 103, and a liquid crystal layer 104 between the lower substrate 102 and the upper substrate 103.
  • the lower substrate 102 may include a plurality of pixel units 101 disposed on the base substrate 50, and each of the pixel units 101 includes a Thin Film Transistor (TFT).
  • the field sequential display panel may further include an OLED light source 20 disposed on a side of the base substrate 50 away from the thin film transistor. It is used to supply the three primary colors of light to the pixel unit 101.
  • the OLED light source may include a plurality of three primary color light source groups 201, and each of the three primary color light source groups 201 includes a first color sub-light source 2011, a second color sub-light source 2012, and a third color sub-light source 2013.
  • Each sub-light source as shown in FIG. 1b, may include an anode 2014, a cathode 2016, and a luminescent layer 2015 between the anode 2014 and the cathode 2016.
  • the material of the light-emitting layer 2015 is the material that emits the first color light
  • the material of the light-emitting layer 2015 is the second color light
  • Material; for the third color sub-light source 2013, the material of the light-emitting layer 2015 is a material that emits light of a third color; wherein the first color, the second color, and the third color are different colors.
  • the electron transport layer and the hole transport layer may be further included, and further, in order to increase the electron and the hole injection into the light-emitting layer
  • the efficiency may further include an electron injection layer disposed between the cathode and the electron transport layer, and a hole injection layer between the anode and the hole transport layer.
  • Each of the pixel units 101 of the lower substrate 102 includes a thin film transistor, a pixel electrode, and a common electrode, but does not include a color filter layer; the thin film transistor includes a gate, a gate insulating layer, a semiconductor active layer, a source and a drain The drain is connected to the pixel electrode.
  • the lower substrate 102 further includes a gate line connected to the gate and a data line connected to the source.
  • the first color, the second color, and the third color may be red, green, and blue, respectively, but the embodiment of the present invention is not limited thereto, and other three primary colors such as cyan and magenta may be used. ,yellow.
  • the materials of the anodes 2014 and the cathodes 2016 in each of the sub-light sources and the mutual positions are not limited as long as the light emitted from each of the sub-light sources is directed toward the lower substrate 102.
  • each of the three primary color light source groups 201 of the embodiment of the present invention may correspond to a plurality of pixel units 101.
  • each pixel unit 101 must be able to receive the light of the first color, the light of the second color, and the light of the third color, so that the OLED light source 20 and the pixel unit are required.
  • There is a certain distance between 101 i.e., the thickness of the base substrate 50.
  • the embodiment of the present invention does not limit the thickness of the base substrate 50 and the number of pixel units 101 corresponding to the three primary color light source groups 201, so that each pixel unit 101 of the lower substrate 102 can receive the first color sub-light source.
  • Light emitted by each of the second color sub-light source and the third color sub-light source By controlling the deflection of the liquid crystal, the pixel unit 101 can emit light of a corresponding color satisfying the required brightness at different timings of one frame.
  • the embodiment of the present invention provides a field sequential display panel, which uses the first color sub-light source 2011, the second color sub-light source 2012, and the third color sub-light source 2013 of the OLED light source 20 to respectively provide three primary colors of light to the lower substrate 102, so that the The liquid crystal display panel 10 can also perform color display without a color filter layer.
  • the embodiment of the present invention adopts the OLED light source 20 as the backlight of the field sequential display panel, and can precisely control the opening and closing of each sub-light source on the one hand, has higher flexibility, and can accurately control the brightness values of the three primary colors of light. In this way, the field sequential display panel has a better display effect, and on the other hand, the defect of the LED lamp as a backlight can be avoided, so that the field sequential display device has better performance.
  • the shape of the pixel unit 101 may be a square; the thickness of the base substrate 50 is less than or equal to 10 times the side length of the pixel unit 101.
  • any one of the three primary color light source groups 201 of the OLED light source 20 corresponds to the pixel unit 101 of 4 rows ⁇ 4 columns or 5 rows ⁇ 5 columns.
  • each of the three primary color light source groups 201 is made to correspond to fewer pixel units 101, it means that the size of each of the sub-light sources of the OLED light source 20 is relatively small; if each of the three primary color light source groups 201 is corresponding to more pixel units 101, In order to make the light reaching the liquid crystal display panel 10 uniform, it is necessary to increase the pitch between the OLED light source 20 and the pixel unit 101 (ie, the thickness of the base substrate 50). Therefore, in order to integrate the above two cases, the embodiment of the present invention makes a three primary color light source group 201 corresponding to 4 rows ⁇ 4 columns or 5 rows ⁇ 5 of the pixel units 101, and the size of the OLED light source 20 is controlled within a reasonable range. In the conventional process, the thickness of the field display panel can also be prevented from being too thick.
  • the embodiment of the present invention provides a field sequential display device, as shown in FIGS. 1b and 1c, the field sequential display device includes a liquid crystal display panel 10, and an OLED (Organic Light-Emitting Diode) disposed on the light incident side of the liquid crystal display panel 10. , an organic electroluminescent diode) light source 20 for providing a three primary color light source to a pixel unit of the liquid crystal display panel 10.
  • OLED Organic Light-Emitting Diode
  • an organic electroluminescent diode light source 20 for providing a three primary color light source to a pixel unit of the liquid crystal display panel 10.
  • the upper polarizer 30 disposed on the light exiting side of the liquid crystal display panel 10 and the lower polarizer 40 disposed between the liquid crystal display panel 10 and the OLED light source 20 may be further included.
  • the OLED light source 20 may include: a plurality of three primary color light source groups 201, each of the three primary color light source groups 201 includes a first color sub-light source 2011, a second color sub-light source 2012, and a third color sub-light source 2013; each sub-light source includes an anode 2014, cathode 2016 and luminescent layer 2015 between the anode and the cathode.
  • the material of the light-emitting layer 2015 is the material that emits the first color light
  • the material of the light-emitting layer 2015 is the second color light
  • Material; for the third color sub-light source 2013, the material of the light-emitting layer 2015 is a material that emits light of a third color; wherein the first color, the second color, and the third color are different colors.
  • the electron transport layer and the hole transport layer may be further included, and further, in order to increase the electron and the hole injection into the light-emitting layer
  • the efficiency may further include an electron injection layer disposed between the cathode and the electron transport layer, and a hole injection layer between the anode and the hole transport layer.
  • Each of the pixel units 101 of the liquid crystal display panel 10 includes a thin film transistor, a pixel electrode, and a common electrode, but does not include a color filter layer; the thin film transistor includes a gate, a gate insulating layer, a semiconductor active layer, a source and a drain The drain is connected to the pixel electrode.
  • the liquid crystal display panel 10 further includes a gate line connected to the gate and a data line connected to the source.
  • the thin film transistor and the pixel electrode are disposed on the lower substrate 102 of the liquid crystal display panel 10, the lower substrate 102 is disposed adjacent to the lower polarizer 40; the common electrode may be disposed on the lower substrate 102
  • the upper substrate 103 may be disposed on the upper substrate 103, and the upper substrate 103 is disposed adjacent to the upper polarizer 30, and a liquid crystal layer 104 is disposed between the upper substrate 103 and the lower substrate 102.
  • the substrate electrode and the common electrode are in the same layer for an In-Plane Switch (IPS) lower substrate.
  • the electrodes are spaced apart and are strip electrodes; for the substrate of the Advanced-Super Dimensional Switching (ADS), the pixel electrode and the common electrode are disposed in different layers, wherein the upper electrode It is a strip electrode, and the lower electrode is a plate electrode. Based on this, for the upper substrate, it includes a black matrix.
  • the first color, the second color, and the third color may be red, green, and blue, respectively, but the embodiment of the present invention is not limited thereto, and other three primary colors such as cyan may be used. Magenta, yellow.
  • the materials of the anodes 2014 and the cathodes 2016 in each of the sub-light sources and the mutual positions are not limited as long as the light emitted from each of the sub-light sources is directed toward the liquid crystal display panel 10.
  • each of the three primary color light source groups 201 of the embodiment of the present invention may correspond to the plurality of pixel units 101 of the liquid crystal display panel 10.
  • the liquid crystal display panel 10 needs to be normally displayed, that is, each pixel unit 101 must be able to receive the light of the first color, the light of the second color, and the light of the third color, so that the OLED light source 20 and the liquid crystal are required. There is a certain distance between the display panels 10.
  • the embodiment of the present invention does not limit the spacing between the OLED light source 20 and the liquid crystal display panel 10, and how many pixel units 101 corresponding to the three primary color light source groups 201, so that each pixel unit 101 of the liquid crystal display panel 10 can be The light emitted by each of the first color sub-light source, the second color sub-light source and the third color sub-light source can be received, and by controlling the deflection of the liquid crystal, the pixel unit 101 can be issued at different timings of one frame. Light of the corresponding color of brightness is required.
  • the embodiment of the present invention provides a field sequential display device, which uses the first color sub-light source 2011, the second color sub-light source 2012, and the third color sub-light source 2013 of the OLED light source 20 to respectively provide the three primary colors of light to the liquid crystal display panel 10, so as to In the case of a color filter layer, color display is also possible.
  • the embodiment of the present invention adopts the OLED light source 20 as the backlight of the field sequential display panel, and can precisely control the opening and closing of each sub-light source on the one hand, has higher flexibility, and can accurately control the brightness values of the three primary colors of light. In this way, the field sequential display panel has a better display effect, and on the other hand, the defect of the LED lamp as a backlight can be avoided, so that the field sequential display device has better performance.
  • the shape of the pixel unit 101 in the liquid crystal display panel 10 is square; the spacing between the liquid crystal display panel 10 and the OLED light source 20 is 10 times or less the side length of the pixel unit 101.
  • all the monochromatic sub-light sources of the OLED light source 20 that is, the light emitted by all the first color sub-light sources 2011 or the light emitted by all the second color sub-light sources 2012 or the light emitted by all the third color sub-light sources 2013 reach the liquid crystal.
  • the panel 10 it is possible to mix light uniformly.
  • any one of the three primary color light source groups 201 of the OLED light source 20 corresponds to the pixel unit 101 in the liquid crystal display panel 10 in 4 rows ⁇ 4 columns or 5 rows ⁇ 5 columns.
  • each of the three primary color light source groups 201 is associated with a smaller number of pixel units 101, it means The size of each sub-light source of the OLED light source 20 is relatively small; if each of the three primary color light source groups 201 corresponds to more pixel units 101, in order to make the light reaching the liquid crystal display panel 10 uniform, it is necessary to increase the liquid crystal display panel 10 and the The spacing between the OLED light sources 20 is described. Therefore, in order to integrate the above two cases, the embodiment of the present invention makes a three primary color light source group 201 corresponding to 4 rows ⁇ 4 columns or 5 rows ⁇ 5 of the pixel units 101, and the size of the OLED light source 20 is controlled within a reasonable range.
  • the thickness of the field sequential display device can also be prevented from being too thick in a conventional process.
  • the OLED light source 20 is an active matrix type display panel, that is, each of the sub-light sources of the OLED light source 20 further includes a thin film transistor.
  • the materials of the red, green, and blue light in the OLED light source 20 are relatively easy to prepare, and the current application is also relatively wide. Therefore, the first color, the second color, and the third color of the embodiment of the present invention may be separately Red (R), green (G), and blue (B), that is, the luminescent layer 2015 in the first color sub-light source 2011 is a red luminescent layer, and the luminescent layer 2015 in the second color sub-light source 2012 is a green luminescent layer.
  • the luminescent layer 2015 in the third color sub-light source 2013 is a blue luminescent layer.
  • the OLED light source 20 may be an OLED display panel; each of the three primary color light source groups 201 corresponds to one pixel unit of the OLED display panel.
  • the first color sub-light source 2011 emits red light
  • the second color sub-light source 2012 emits green light
  • the third color sub-light source 2013 emits blue light for explanation.
  • An embodiment of the present invention provides a driving method for driving any of the above-described field sequential displays/devices, wherein the structure of the field sequential display panel/device is as described above, and details are not described herein again.
  • the driving method may include:
  • the first frame, the second frame, and the third frame constitute one driving cycle.
  • the color field sequential display can be realized by repeating the driving cycle.
  • one half of the above one drive cycle displays a complete image information such that the half drive cycle can be less than the visual persistence time of the human eye.
  • each frame includes only two field orders, and each field order has only one color sub-light source, that is, in any frame, only two color sub-light sources emit light, however, the art is technical. It is known that the color display must be a color mixture of three primary colors. Based on this, the embodiment of the present invention passes the second field sequence of the previous frame adjacent to the frame and the first field sequence of the next frame. In the middle, the sub-light source of another color is illuminated, so that the light emitted by the sub-light source of the color in the two field sequences compensates the frame, thereby realizing the color mixing of the three primary colors to realize color display.
  • the light emitted by the first color sub-light source 2011 is red (R)
  • the light emitted by the second color sub-light source 2012 is green (G)
  • the light emitted by the third color sub-light source 2013 is Blue (B) is an example of the description.
  • An embodiment of the present invention provides a driving method of a field sequential display device
  • the field sequential display device includes a liquid crystal display panel and an OLED light source, wherein the OLED light source is used to provide a light source to the liquid crystal display panel; and the liquid crystal display panel includes a plurality of pixel units;
  • the OLED light source includes a plurality of three primary color light source groups 201, and each of the three primary color light source groups 201 includes a first color sub-light source, a second color sub-light source, and a third color sub-light source.
  • the OLED light source can be used as the backlight of the liquid crystal display panel. Since the OLED light source can accurately control the opening or closing of each sub-light source, the flexibility is more than that of the field sequential display device using the LED lamp as the backlight. It is high and can reduce the thickness of the field sequential display device.
  • the driving method includes: driving a first color sub-light source in the OLED light source to emit light in a first field sequence of the first frame, and driving a second color sub-light source in the OLED light source to emit light in a second field sequence of the first frame Driving a third color sub-light source in the OLED light source in a first field sequence of the second frame, and driving a first color sub-light source in the OLED light source to emit light in a second field sequence of the second frame; the second frame The first field sequence is adjacent to the second field sequence of the first frame; in the first field sequence of the third frame, the second color sub-light source in the OLED light source is driven to emit light, in the second field order of the third frame Driving a third color sub-light source in the OLED light source; the first field sequence of the third frame and the second frame of the second frame The field sequence is adjacent; in each field sequence, the liquid crystal deflection in the liquid crystal display panel is driven to cause the light emitted by the pixel unit of the liquid crystal display panel to
  • the first frame, the second frame, and the third frame constitute one driving cycle.
  • the color field sequential display can be realized by repeating the above driving cycle. Since the above driving method includes only two field orders per frame, the liquid crystal in the liquid crystal display panel only needs to be inverted twice in each frame. Turn, you can achieve color field display. Therefore, when the number of inversions of the liquid crystal is reduced within one frame time, the liquid crystal response time is relatively increased, thereby reducing the requirement for the liquid crystal response time.
  • step S104 may be performed first to deflect the liquid crystal, and at the same time or thereafter, step S101, step S102 or step S103 is performed to cause the sub-light source of the OLED light source 20 to emit light.
  • step S104 can be performed first. Then, step S101, step S102 or step S103 is performed.
  • one frame is 60 Hz, and the time of each frame can be 1/60 s, that is, 16.67 ms.
  • One frame time is divided into two field orders, and the time per field is 8.335 ms.
  • the gate lines in the liquid crystal display panel 10 are progressively scanned by the gate driving circuit, and the data lines input data voltages to deflect the liquid crystals to the first angle, the OLED light source
  • the first color sub-light source 2011 of 20 emits light; then enters the next field sequence, the liquid crystal display panel 10 scans the gate line progressively by the gate driving circuit, and the data line inputs the data voltage to deflect the liquid crystal to the second angle, the OLED light source
  • the second color sub-light source 2012 of 20 emits light.
  • the first angle and the second angle are related to the light transmittance of the liquid crystal display panel 10.
  • the specifications of the liquid crystal are different, and the liquid crystal deflection angles corresponding to the same transmittance are also different.
  • the liquid crystal specification is constant, the correspondence between the light transmittance and the liquid crystal deflection angle can be found by the specification of the liquid crystal.
  • the light transmittance of the pixel unit of the liquid crystal display panel 10 in the first field sequence can be obtained, that is, the pixel
  • the light transmittance of the liquid crystal in the cell and according to the light transmittance of the liquid crystal and the type of the liquid crystal, the deflection angle of the liquid crystal in the pixel unit 101 in the first field sequence can be obtained.
  • the light transmittance of the pixel unit of the liquid crystal display panel 10 in the second field sequence can be obtained.
  • the over-rate that is, the light transmittance of the liquid crystal in the pixel unit, and the deflection angle of the liquid crystal in the pixel unit in the second field sequence is obtained according to the light transmittance of the liquid crystal and the type of the liquid crystal.
  • the deflection angle of the liquid crystal in each of the other frames is equally acceptable.
  • the liquid crystal in the pixel unit of the liquid crystal display panel 10 can be driven to angularly deflect in each field sequence.
  • color field sequential display method for realizing the three primary color mixed color display will be described in detail below by using an exemplary embodiment for including two field sequences per frame.
  • the first field sequence of the second frame emits blue (B) light through the third color sub-light source 2013, and the second field sequence emits red (R) light through the first color sub-light source 2011. Since the second frame OLED light source 20 does not emit green (G) light, the luminance value of the green light in the second frame needs to be the second field sub-order of the first frame and the second color sub-light source in the first field sequence of the third frame. The brightness value of the green light emitted by 2012 is superimposed and displayed.
  • the luminance values of the green light emitted by the second field sub-light source 2012 in the second field sequence of the first frame and the first field sequence of the third frame may be added and averaged as the second frame.
  • the brightness value of the green light Since the time of each frame is extremely short, the second color sub-light source 2012 is issued by the second field sequence of the first frame, the green light emitted by the second color sub-light source 2012 and the first field sequence of the third frame.
  • the green light is superimposed to compensate for the green light in the second frame, thereby achieving a color display of each frame (ie, displaying the corresponding color value).
  • the blue light in the first frame needs to be superimposed by the zeroth frame (not shown in the figure) and the blue light emitted by the third color sub-light source 2013 in the second frame; the red light in the third frame needs to pass The red light emitted by the first color sub-light source 2011 in the second frame is superimposed with the fourth frame (not shown).
  • the specific superposition method is the same as above, and will not be described here.
  • the times of the first field sequence and the second field sequence described above may be the same.
  • the embodiment of the present invention divides one frame (60 Hz) into two field orders, the field time is 8.335 ms, which is divided into three fields, and the field time drive with a time of 5.56 ms is compared with the same one frame time.
  • the response time of the liquid crystal of the liquid crystal display panel 10 when the field is reversed is extended, so that the response time to the liquid crystal can be reduced.
  • the driving method provided by the embodiment of the present invention can realize color display (such as RGB display) and increase the sound of liquid crystal. Time should be taken, thereby reducing the requirement of liquid crystal response time in color field display.
  • the brightness of the light emitted by each color sub-light source in the OLED light source 20 is the same, so that the brightness of the entire display panel is uniform.
  • the embodiment of the present invention further provides a driving method of the field sequential display panel/device; wherein the specific structure of the field sequential display panel/device is the same as the specific structure provided by the foregoing embodiment, and details are not described herein again.
  • the driving method may include:
  • the liquid crystal in the liquid crystal display panel 10 is driven to be deflected so that the light emitted from the pixel unit 101 of the liquid crystal display panel 10 reaches the target brightness value.
  • the first frame and the second frame constitute one driving cycle.
  • the color field sequential display can be realized by repeating the driving cycle.
  • the following embodiments are described by taking the first color sub-light source 2011 to emit red (R) light and the third color sub-light source 2013 emitting blue (B) light as an example.
  • the second field sequential (OLED) OLED light source 20 of each frame emits green light through the second color sub-light source 2012. Therefore, the solution only needs two frames to form a driving cycle, and since each The frames are divided into two field orders, so that the deflection time of the liquid crystal can be prolonged, and the requirement of the liquid crystal response time of the color field sequential display can be reduced.
  • the human eye is sensitive to green light
  • the following method for setting the driving method of the second field sequence is detailed by a specific embodiment.
  • the light distribution of the various colors provided by the OLED display as a backlight is uniform.
  • the brightness of the light emitted by the second color sub-light source 2012 is one-half of the brightness of the light emitted by the first color sub-light source 2011, the first color sub-light source 2011.
  • the brightness of the emitted light is the same as the brightness of the light emitted by the third color sub-light source; the first field sequence and the second field sequence have the same time.
  • the second color sub-light source 2012 emits green light in the second field sequence. Therefore, in one frame, the light emitted by the second color sub-light source 2012 matches the green data of the frame, and the color not in the frame needs to be superimposed and displayed by the data of the previous frame and the next frame. For example, in the second frame, blue light is emitted through the third color sub-light source 2013 in the first field sequence, and the second field sequence emits green light through the second color sub-light source 2012. Since the second frame OLED light source 20 does not emit red light, the red light of the second frame needs to superimpose and display the first field sequence of the first frame and the red field data of the first field sequence of the third frame.
  • the red field values of the first field sequence of the first frame and the first field sequence of the third frame may be added and averaged as the brightness value of the second frame red. Since the time of each frame is extremely short, the first color sub-light source 2011 is issued by the first field sequence of the first frame, the red light emitted by the first color sub-light source 2011 and the first field sequence of the third frame. The red light is superimposed to compensate for the red light in the second frame, thereby realizing RGB display.
  • the blue light in the first frame needs to be superimposed by the zeroth frame (0Frame) and the blue light emitted by the third color sub-light source 2013 in the second frame.
  • the specific superposition method is the same as above, and will not be described here.
  • the light source provided by the entire OLED light source 20 is evenly distributed. Moreover, since the human eye has a high sensitivity to green light, the human eye does not perceive the reduction of green light in a very short period of time, thereby reducing the power consumption of the display device without affecting the display effect. .
  • the brightness of the light emitted by each color sub-light source in the OLED light source is the same, and the time of the first field sequence is twice the second field sequential time.
  • the second color sub-light source 2012 emits green light in the second field sequence. Therefore, in one frame, the light emitted by the second color sub-light source 2012 matches the green data of the frame, and the color not in the frame needs to be superimposed and displayed by the data of the previous frame and the next frame.
  • the specific superimposed manner is the same as that in the first embodiment, and details are not described herein again.
  • the first color sub-light source 2011 emits green light in the second field sequence of each frame for one-half of the red or blue light brightness
  • the light source provided by the entire OLED light source 20 is evenly distributed.
  • the human eye since the human eye has a high sensitivity to green light, the human eye does not perceive the reduction of green light in a very short period of time, thereby reducing the power consumption of the display device without affecting the display effect. .
  • the embodiment of the present invention provides a field sequential display panel, a field sequential display device, and a driving method
  • the field sequential display device includes a liquid crystal display panel, and further includes: an OLED light source located on a light incident side of the liquid crystal display panel, for the liquid crystal display
  • the pixel unit of the display panel provides three primary colors of light; wherein the OLED light source comprises: a plurality of three primary color light source groups, each of the three primary color light source groups includes a first color sub-light source, a second color sub-light source and a third color sub-light source; each sub-light source comprises an anode a cathode and a luminescent layer between the anode and the cathode.
  • the OLED light source can be used as the three primary color backlight of the liquid crystal display panel. Since the OLED light source can accurately control the opening or closing of each sub-light source, the flexibility is compared with the field sequential display device using the LED lamp as the backlight. It is higher and can reduce the thickness of the field sequential display device.
  • the driving method includes: driving a first color sub-light source in the OLED light source to emit light in a first field sequence of the first frame, and driving a second color sub-light source in the OLED light source to emit light in a second field sequence of the first frame Driving a third color sub-light source in the OLED light source in a first field sequence of the second frame, and driving a first color sub-light source in the OLED light source to emit light in a second field sequence of the second frame; the second frame The first field sequence is adjacent to the second field sequence of the first frame; in the first field sequence of the third frame, the second color sub-light source in the OLED light source is driven to emit light, in the second field order of the third frame Driving a third color sub-light source in the OLED light source to emit light; the first field sequence of the third frame is adjacent to the second field order of the second frame; and driving the liquid crystal in the liquid crystal display panel in each field order Deflection so that the light emitted by the pixel unit of the liquid crystal display panel
  • the first frame, the second frame, and the third frame constitute one driving cycle.
  • the color field sequential display can be realized by repeating the above driving cycle. Since the above driving method includes only two field orders per frame, the liquid crystal in the liquid crystal display panel only needs to be inverted twice in each frame. Turn, you can achieve color field display. Therefore, compared with the prior art, when the number of inversions of the liquid crystal is reduced within one frame time, the liquid crystal response time is relatively increased, thereby reducing the requirement for the liquid crystal response time.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种场序显示面板、场序显示装置及驱动方法被提供。该场序显示面板方法包括：下基板(102)，包括衬底基板(50)以及设置在所述衬底基板(50)上的多个像素单元(101)，所述多个像素单元(101)的每个均包括薄膜晶体管；上基板(103)；以及液晶层(104)，位于所述下基板(102)和所述上基板(103)之间；OLED光源(20)设置在所述衬底基板(50)远离所述薄膜晶体管的一侧，用于向所述多个像素单元(101)的每个提供三原色光，其中，所述OLED光源(20)包括：多个三原色光源组(201)，每个三原色光源组(201)包括第一颜色子光源(2011)、第二颜色子光源(2012)和第三颜色子光源(2013)，其中所述第一颜色、所述第二颜色和所述第三颜色是彼此不同的颜色。利用上述场序显示面板、场序显示装置及驱动方法，在采用彩色场序显示方法时，能够降低对液晶响应时间的要求。

Description

场序显示面板、场序显示装置及驱动方法 技术领域
本发明的实施例涉及一种场序显示面板、场序显示装置及驱动方法。
背景技术
目前，液晶显示装置实现彩色显示的方法之一为红(R)、绿(G)、蓝(B)滤光层显示方法。
对于使用RGB滤色层显示方法的液晶显示装置，每个像素单元被划分为三个RGB亚像素，并为每个亚像素提供对应颜色的滤光层，背光源发出的光通过液晶而传送到RGB滤色层，由此形成彩色图像。然而，上述RGB滤色层会降低背光源发出的光线的透过率，从而降低了液晶显示装置的光通量。
发明内容
本发明的实施例提供一种场序显示面板、场序显示装置及驱动方法，能够在采用彩色场序显示方法时，降低对液晶响应时间的要求。
一方面，提供一种场序显示面板，包括：下基板，包括衬底基板以及设置在所述衬底基板上的多个像素单元，所述多个像素单元的每个均包括薄膜晶体管；上基板；以及液晶层，位于所述下基板和所述上基板之间；OLED光源，设置在所述衬底基板远离所述薄膜晶体管的一侧，用于向所述多个像素单元的每个提供三原色光，其中，所述OLED光源包括：多个三原色光源组，每个三原色光源组包括第一颜色子光源、第二颜色子光源和第三颜色子光源，其中所述第一颜色、所述第二颜色和所述第三颜色是彼此不同的颜色。
另一方面，提供一种场序显示装置，包括：液晶显示面板，包括：彼此对置的上基板和下基板；以及液晶层，设置在所述上基板与所述下基板之间；其中所述液晶显示面板包括多个像素单元，OLED光源，位于所述液晶显示面板入光侧，用于向所述液晶显示面板的所述多个像素单元的每个提供三原色光，其中，所述OLED光源包括：多个三原色光源组，每个三原色光源组 包括第一颜色子光源、第二颜色子光源和第三颜色子光源，其中所述第一颜色、所述第二颜色和所述第三颜色是彼此不同的颜色。
再一方面，提供一种上述场序显示面板或场序显示装置的驱动方法，所述驱动方法包括：在第一帧的第一场序，驱动所述OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动所述OLED光源中的第二颜色子光源发光；在第二帧的第一场序，驱动所述OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动所述OLED光源中的所述第一颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；在第三帧的第一场序，驱动所述OLED光源中的所述第二颜色子光源发光，在第三帧的第二场序，驱动所述OLED光源中的所述第三颜色子光源发光；所述第三帧的第一场序与所述第二帧的第二场序相邻；在第一场序和第二场序中的每一场序，驱动所述液晶层中的液晶偏转，以使所述多个像素单元的每个发出的光达到目标亮度值；其中，所述第一帧、所述第二帧以及所述第三帧构成一个驱动周期。
又一方面，提供一种上述场序显示面板或场序显示装置的驱动方法，所述驱动方法包括：在第一帧的第一场序，驱动所述OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动所述OLED光源中的第二颜色子光源发光；在第二帧的第一场序，驱动所述OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动所述OLED光源中的所述第二颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；在每一场序，驱动所述液晶层中的液晶偏转，以使所述液晶层的所述多个像素单元的每个发出的光达到目标亮度值；其中，所述第一帧以及所述第二帧构成一个驱动周期。
附图说明
为了更清楚地说明本发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地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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1a为本发明实施例提供的一种场序显示面板的截面结构图；
图1b为本发明实施例提供的一种场序显示装置的截面结构图；
图1c为本发明实施例提供的液晶显示面板中的像素单元与OLED光源中的三原色光源组对应的示意图；
图2为根据本发明实施例的一种驱动方法对应的场序划分示意图；
图3为根据本发明实施例的一种驱动方法对应的场序划分示意图；以及
图4为根据本发明实施例的一种驱动方法对应的另一种场序划分示意图。
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、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
对于实现彩色显示的彩色场序显示方法，无需在液晶显示装置中设置RGB滤色层，而是在显示装置的每个像素单元中设置RGB色LED灯，并以分时的方式控制像素单元对应的液晶分子偏转预设的角度，并控制RGB色LED光源分时发出R、G、B三原色光通过液晶，以使在一帧中所述像素单元显示相应的颜色值。
在该分时控制方法中，可以将一帧时间划分为三场，在一场时间内，液晶显示器中的所有像素单元可以完成一次扫描，当液晶翻转角度与目标透过率相匹配后，一种颜色(例如红色)的背光完全打开。通过连续三场，可以使得R、G、B三种颜色的LED灯分别点亮。这样一来在一帧之内，三种不同颜色的光可以形成混色效果，从而形成彩色图像。这样，彩色场序显示方法需要液晶具有较高的响应速度，响应时间上需要降至RGB滤色器方法的1/3。
本发明实施例提供一种场序显示面板，如图1a所示，包括下基板102、上基板103以及位于下基板102和上基板103之间的液晶层104。此外，下基板102可以包括设置在衬底基板50上的多个像素单元101，每个像素单元101均包括薄膜晶体管(Thin Film Transistor，简称TFT)。此外，场序显示面板还可以包括设置在衬底基板50远离薄膜晶体管一侧的OLED光源20， 用于向像素单元101提供三原色光。
其中，OLED光源可以包括：多个三原色光源组201，每个三原色光源组201包括第一颜色子光源2011、第二颜色子光源2012和第三颜色子光源2013。每个子光源如图1b所示，可以包括阳极2014、阴极2016以及位于阳极2014和阴极2016之间的发光层2015。
示例性地，对于第一颜色子光源2011，其中的发光层2015的材料为发第一颜色光的材料；对于第二颜色子光源2012，其中的发光层2015的材料为发第二颜色光的材料；对于第三颜色子光源2013，其中的发光层2015的材料为发第三颜色光的材料；其中，第一颜色、第二颜色和第三颜色为不同的颜色。
进一步的，对于每个子光源，其除包括用于发相应颜色光的发光层外，还可以包括电子传输层和空穴传输层，进一步为了能够提高所述电子和所述空穴注入发光层的效率，还可以包括设置在所述阴极与所述电子传输层之间的电子注入层，以及在所述阳极与所述空穴传输层之间的空穴注入层。
所述下基板102的每个像素单元101均包括薄膜晶体管、像素电极和公共电极，但不包括彩色滤光层；薄膜晶体管包括栅极、栅绝缘层、半导体有源层、源极和漏极，所述漏极与所述像素电极相连。当然，所述下基板102还包括与栅极连接的栅线，与源极连接的数据线。
需要说明的是，第一，所述第一颜色、第二颜色、第三颜色可以分别为红、绿、蓝，但是本发明实施例并不限于此，也可以是其他三原色例如青色、品红、黄色。
第二，不对每个子光源中阳极2014和阴极2016的材料以及相互的位置进行限定，只要能保证每个子光源发出的光朝向下基板102即可。
第三，本发明实施例每个三原色光源组201可以对应多个像素单元101。
基于此，场序显示面板要想正常显示，即每个像素单元101必须都能接收到第一颜色的光、第二颜色的光和第三颜色的光，则需使OLED光源20和像素单元101之间具有一定的距离(即衬底基板50的厚度)。其中，本发明实施例不对衬底基板50的厚度，以及三原色光源组201对应多少个像素单元101进行限定，以能使下基板102的每个像素单元101均能接收到第一颜色子光源、第二颜色子光源和第三颜色子光源中每个子光源发出的光，并通 过控制液晶的偏转，能使该像素单元101可在一帧的不同时序发出满足要求亮度的相应颜色的光即可。
本发明实施例提供一种场序显示面板，利用OLED光源20的第一颜色子光源2011、第二颜色子光源2012和第三颜色子光源2013分别给下基板102提供三原色光，以使所述液晶显示面板10在没有彩色滤光层的情况下，也可以进行彩色显示。其中，本发明实施例采用OLED光源20作为所述场序显示面板的背光源，一方面可以精确控制各子光源的打开和关闭，具有更高的灵活性，并且可精确控制三原色光的亮度值，使得场序显示面板具有更好的显示效果，另一方面，可以避免作为背光源的LED灯的缺陷，使该场序显示装置具有更好的性能。
示例性地，所述像素单元101的形状可以为正方形；所述衬底基板50的厚度小于等于10倍所述像素单元101的边长。
这样可以保证所述OLED光源20的所有单色子光源，即所有第一颜色子光源2011发出的光或所有第二颜色子光源2012发出的光或所有第三颜色子光源2013发出的光到达所述像素单元101时能够混光均匀。
进一步的，所述OLED光源20中的任一个三原色光源组201对应4行×4列或5行×5列个所述像素单元101。
此处，若使每个三原色光源组201对应较少的像素单元101，就意味着OLED光源20的每个子光源的尺寸比较小；若使每个三原色光源组201对应更多的像素单元101，则为了使到达液晶显示面板10的光均匀，需增大所述OLED光源20与像素单元101之间的间距(即衬底基板50的厚度)。因此，为了综合上述两种情况，本发明实施例使一个三原色光源组201对应4行×4列或5行×5个所述像素单元101，既将OLED光源20的尺寸控制在合理范围内，以适用常规工艺，也可避免该场序显示面板的厚度过厚。
本发明实施例提供一种场序显示装置，如图1b和1c所示，该场序显示装置包括液晶显示面板10，设置于所述液晶显示面板10入光侧的OLED(Organic Light-Emitting Diode，有机电致发光二极管)光源20，所述OLED光源20用于向所述液晶显示面板10的像素单元提供三原色光源。当然，还可以包括设置于所述液晶显示面板10出光侧的上偏光片30、设置于所述液晶显示面板10和所述OLED光源20之间的下偏光片40。
其中，所述OLED光源20可以包括：多个三原色光源组201，每个三原色光源组201包括第一颜色子光源2011、第二颜色子光源2012和第三颜色子光源2013；每个子光源包括阳极2014、阴极2016以及位于所述阳极和所述阴极之间的发光层2015。
示例性地，对于第一颜色子光源2011，其中的发光层2015的材料为发第一颜色光的材料；对于第二颜色子光源2012，其中的发光层2015的材料为发第二颜色光的材料；对于第三颜色子光源2013，其中的发光层2015的材料为发第三颜色光的材料；其中，第一颜色、第二颜色和第三颜色为不同的颜色。
进一步的，对于每个子光源，其除包括用于发相应颜色光的发光层外，还可以包括电子传输层和空穴传输层，进一步为了能够提高所述电子和所述空穴注入发光层的效率，还可以包括设置在所述阴极与所述电子传输层之间的电子注入层，以及在所述阳极与所述空穴传输层之间的空穴注入层。
所述液晶显示面板10的每个像素单元101均包括薄膜晶体管、像素电极和公共电极，但不包括彩色滤光层；薄膜晶体管包括栅极、栅绝缘层、半导体有源层、源极和漏极，所述漏极与所述像素电极相连。当然，所述液晶显示面板10还包括与栅极连接的栅线，与源极连接的数据线。
示例性地，所述薄膜晶体管和像素电极设置于所述液晶显示面板10的下基板102，所述下基板102靠近所述下偏光片40设置；所述公共电极可以设置于所述下基板102，也可以设置于上基板103上，所述上基板103靠近所述上偏光片30设置，且所述上基板103和所述下基板102之间设置有液晶层104。
当所述像素电极和所述公开电极均设置于所述下基板102时，对于面内转换型(In-Plane Switch，简称IPS)下基板而言，所述像素电极和所述公共电极同层间隔设置，且均为条状电极；对于高级超维场转换型(Advanced-super Dimensional Switching，简称ADS)下基板而言，所述像素电极和所述公共电极不同层设置，其中在上的电极为条状电极，在下的电极为板状电极。基于此，对于上基板，其包括黑矩阵。
需要说明的是，第一，所述第一颜色、第二颜色、第三颜色可以分别为红、绿、蓝，但是本发明实施例并不限于此，也可以是其他三原色例如青色、 品红、黄色。
第二，不对每个子光源中阳极2014和阴极2016的材料以及相互的位置进行限定，只要能保证每个子光源发出的光是朝向液晶显示面板10即可。
第三，示例性地，本发明实施例每个三原色光源组201可以对应液晶显示面板10的多个像素单元101。
基于此，液晶显示面板10要想正常显示，即每个像素单元101必须都能接收到第一颜色的光、第二颜色的光和第三颜色的光，则需使于OLED光源20和液晶显示面板10之间具有一定的距离。其中，本发明实施例不对所述OLED光源20和液晶显示面板10之间的间距，以及三原色光源组201对应多少个像素单元101进行限定，以能使液晶显示面板10的每个像素单元101均能接收到第一颜色子光源、第二颜色子光源和第三颜色子光源中每个子光源发出的光，并通过控制液晶的偏转，能使该像素单元101可在一帧的不同时序发出满足要求亮度的相应颜色的光即可。
本发明实施例提供一种场序显示装置，利用OLED光源20的第一颜色子光源2011、第二颜色子光源2012和第三颜色子光源2013分别给液晶显示面板10提供三原色光，以在没有彩色滤光层的情况下，也可以进行彩色显示。其中，本发明实施例采用OLED光源20作为所述场序显示面板的背光源，一方面可以精确控制各子光源的打开和关闭，具有更高的灵活性，并且可精确控制三原色光的亮度值，使得场序显示面板具有更好的显示效果，另一方面，可以避免作为背光源的LED灯的缺陷，使该场序显示装置具有更好的性能。
示例性地，所述液晶显示面板10中的像素单元101的形状为正方形；所述液晶显示面板10与所述OLED光源20之间的间距小于等于10倍所述像素单元101的边长。
这样可以保证所述OLED光源20的所有单色子光源，即所有第一颜色子光源2011发出的光或所有第二颜色子光源2012发出的光或所有第三颜色子光源2013发出的光到达液晶显示面板10时能够混光均匀。
进一步的，所述OLED光源20中的任一个三原色光源组201对应4行×4列或5行×5列个所述液晶显示面板10中的所述像素单元101。
此处，若使每个三原色光源组201对应较少的像素单元101，就意味着 OLED光源20的每个子光源的尺寸要比较小；若使每个三原色光源组201对应更多的像素单元101，则为了使到达液晶显示面板10的光均匀，需增大液晶显示面板10与所述OLED光源20之间的间距。因此，为了综合上述两种情况，本发明实施例使一个三原色光源组201对应4行×4列或5行×5个所述像素单元101，既将OLED光源20的尺寸控制在合理范围内，以适用常规工艺，也可避免该场序显示装置的厚度过厚。
示例性地，所述OLED光源20为有源矩阵型显示面板，即，OLED光源20的每个子光源均还包括薄膜晶体管。
进一步的，考虑到OLED光源20中的发红光、绿光、蓝光的材料比较容易制备，且目前应用也比较广，因此，本发明实施例第一颜色、第二颜色、第三颜色可以分别为红色(R)、绿色(G)、蓝色(B)，即，第一颜色子光源2011中的发光层2015为红色发光层，第二颜色子光源2012中的发光层2015为绿色发光层，第三颜色子光源2013中的发光层2015为蓝色发光层。
基于上述，示例性地，所述OLED光源20可以为OLED显示面板；所述每个三原色光源组201对应于OLED显示面板的一个像素单元。
以下如无特别说明，均以第一颜色子光源2011发红光，第二颜色子光源2012发绿光，第三颜色子光源2013发蓝光进行说明。
本发明实施例提供一种用于驱动上述任意一种场序显示/装置的驱动方法，其中，场序显示面板/装置的结构如上所述，此处不再赘述。
所述驱动方法，可以包括：
S101、在如图2所示的第一帧(1Frame)的第一场序(1st Field)，驱动OLED光源20中的第一颜色子光源2011发光，在第一帧的第二场序(2nd Field)，驱动OLED光源20中的第二颜色子光源2012发光。
S102、在第二帧(2Frame)的第一场序，驱动OLED光源20中的第三颜色子光源2013发光，在第二帧的第二场序，驱动OLED光源中20的第一颜色子光源2011发光。其中，第二帧的第一场序与第一帧的第二场序相邻。
S103、在第三帧(3Frame)的第一场序，驱动OLED光源20中的第二颜色子光源2012发光，在第三帧的第二场序，驱动OLED光源20中的第三颜色子光源2013发光。其中，第三帧的第一场序与第二帧的第二场序相邻。
S104、在每一场序，驱动液晶显示面板10中的液晶偏转，以使液晶显 示面板10的像素单元101发出的光达到目标亮度值。彩色显示时液晶显示面板10的像素单元要显示的目标颜色值对应三原色的目标亮度值。
其中，上述第一帧、第二帧以及第三帧构成一个驱动周期。在上述驱动方法中，通过重复该驱动周期，即可实现彩色场序显示。
示例性地，上述一个驱动周期的一半显示一幅完整的图像信息，这样，半个驱动周期可以小于人眼的视觉暂留时间。
这里，由于每帧只包括两个场序，而每个场序只有一种颜色的子光源发光，也就是说，在任一帧中，只有两种颜色的子光源发光，然而，本领域就技术人员均知道，要想实现彩色显示必须是三原色的混色，基于此，本发明实施例通过分别在与该帧相邻的上一帧的第二场序中和下一帧的第一个场序中，使另一种颜色的子光源发光，以使上述两个场序中该颜色的子光源发出的光对本帧进行补偿，从而实现三原色的混色以实现彩色显示。
为了方面说明，以下实施例均是以第一颜色子光源2011发出的光为红色(R)，第二颜色子光源2012发出的光为绿色(G)，第三颜色子光源2013发出的光为蓝色(B)为例进行的说明。
本发明实施例提供一种场序显示装置的驱动方法，该场序显示装置包括液晶显示面板和OLED光源，所述OLED光源用于向液晶显示面板提供光源；液晶显示面板包括多个像素单元；OLED光源包括多个三原色光源组201，每个三原色光源组201包括第一颜色子光源、第二颜色子光源、第三颜色子光源。这样一来，可以采用OLED光源作为液晶显示面板的背光源，由于OLED光源能够精确控制各子光源的打开或关闭，因此相对于采用LED灯作为背光源的场序显示装置而言，灵活性更高，且能够降低场序显示装置的厚度。
此外，上述驱动方法包括：在第一帧的第一场序，驱动OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动OLED光源中的第二颜色子光源发光；在第二帧的第一场序，驱动OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动OLED光源中的第一颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；在第三帧的第一场序，驱动OLED光源中的第二颜色子光源发光，在第三帧的第二场序，驱动OLED光源中的第三颜色子光源发光；所述第三帧的第一场序与所述第二帧的第二 场序相邻；在每一场序，驱动液晶显示面板中的液晶偏转，以使液晶显示面板的像素单元发出的光达到目标亮度值。其中，上述第一帧、第二帧以及第三帧构成一个驱动周期。这样一来，通过重复上述驱动周期就可以实现彩色场序显示，由于上述驱动方法中，每一帧只包括两个场序，因此液晶显示面板中的液晶，在每一帧只需要两次反转，即可实现彩色场序显示。所以，在一帧时间内，液晶的反转次数减少，则液晶响应时间相对增大，从而降低了对液晶响应时间的要求。
需要说明的是、本发明对上述步骤S104分别与步骤S101、步骤S102以及步骤S103的先后顺序不做限定。通常情况下，在每一场序，可以先进行步骤S104以将液晶进行偏转，与此同时或之后再进行步骤S101、步骤S102或步骤S103，使得OLED光源20的子光源进行发光。然而，为了降低OLED光源20的功耗，可以等到液晶完全偏转后，OLED光源20再发光，从而可以避免由于OLED光源20的发光时长增加而造成功耗的上升，因此，可以先进行步骤S104，然后再进行步骤S101、步骤S102或步骤S103。
例如，一帧为60Hz，每一帧的时间可以为1/60s，即16.67ms。一帧时间分为两个场序，则每场的时间为8.335ms。在如图2所示的第一帧的第一场序，通过栅极驱动电路对液晶显示面板10中的栅线进行逐行扫描，数据线输入数据电压使得液晶偏转至第一角度，OLED光源20中的第一颜色子光源2011发光；然后进入下一场序，液晶显示面板10通过栅极驱动电路对栅线进行逐行扫描，数据线输入数据电压使得液晶偏转至第二角度，OLED光源20中的第二颜色子光源2012发光。
其中，上述第一角度和第二角度与液晶显示面板10的光透过率有关。液晶的规格不同，相同透过率对应的液晶偏转角度也不尽相同。当液晶规格一定后，可以通过液晶的规格查找出光透过率与液晶偏转角度之间的对应关系。
示例性地，根据第一颜色子光源2011发出的红光的亮度值，以及目标红光亮度值，便可以得到第一场序中液晶显示面板10的像素单元的光透过率，即该像素单元中液晶的光透过率，而根据液晶的光透过率以及液晶的类型，便可以得到第一场序中该像素单元101中液晶的偏转角度。
同理，根据第二场序中第二颜色子光源2012发出的绿光的亮度值，以及目标绿光亮度值，便可以得到第二场序中液晶显示面板10的像素单元的光透 过率，即该像素单元中液晶的光透过率，而根据液晶的光透过率以及液晶的类型，便得到第二场序中该像素单元中液晶的偏转角度。其它每一帧中液晶的偏转角度同理可得。
基于此，通过给液晶显示面板10中的像素电极和公共电极提供相应的电压，便可以在每个场序中驱动液晶显示面板10的像素单元中液晶进行角度偏转。
进一步的，以下通过示例性的实施例对每帧包括两个场序，来实现三原色混色显示的彩色场序显示方法进行详细的说明。
例如，如图2所示，在第二帧的第一场序通过第三颜色子光源2013发出蓝色(B)光，第二场序通过第一颜色子光源2011发出红色(R)光。由于第二帧OLED光源20没有发绿色(G)光，因此第二帧中绿光的亮度值需要将第一帧的第二场序和第三帧的第一场序中第二颜色子光源2012发出的绿光的亮度值进行叠加显示。
示例性地，可以将第一帧的第二场序和第三帧的第一场序中第二颜色子光源2012发出的绿光的亮度值进行相加并取平均值，以作为第二帧绿光的亮度值。由于每帧的时间极短，因此通过将第一帧的第二场序中，第二颜色子光源2012发出的绿光与第三帧的第一场序中，第二颜色子光源2012发出的绿光进行叠加，以对第二帧中的绿光进行补偿，从而实现每帧的彩色显示(即显示相应的颜色值)。
同理，第一帧中的蓝光，需要通过第零帧(图中未示出)和第二帧中第三颜色子光源2013发出的蓝光进行叠加得到；第三帧中的红光，需要通过第二帧中第一颜色子光源2011发出的红光和第四帧(图中未示出)进行叠加得到。具体的叠加方法同上所述，此处不再赘述。
基于上述，为了使得作为背光源的OLED显示器提供的各种颜色的光分布均匀，上述第一场序和第二场序的时间可以相同。
由于本发明实施例将一帧(60Hz)被分为了两个场序，因此一场时间为8.335ms，相对于将同样的一帧时间分为三场，一场时间为5.56ms的场序驱动方法而言，液晶显示面板10的液晶在每一场进行翻转时的响应时间有所延长，因此可以降低对液晶响应时间的要求。综上所述，本发明实施例提供的驱动方法，既可以实现彩色显示(例如RGB显示)，又可以增加液晶的响 应时间，从而降低了彩色场序显示时对液晶响应时间的要求。
进一步的，在所述驱动周期，所述OLED光源20中的各颜色子光源发出的光的亮度相同，从而整个显示面板的亮度均匀。
此外，本发明实施例还提供了另外一种场序显示面板/装置的驱动方法；其中，该场序显示面板/装置的具体结构与前述实施例提供的具体结构相同，此处不再赘述。
所述驱动方法，可以包括：
S201、在如图3所示第一帧(1Frame)的第一场序(1st Field)，驱动OLED光源20中的第一颜色子光源2011发光，在第一帧的第二场序(2nd Field)，驱动OLED光源20中的第二颜色子光源2012发光。
S202、在第二帧(2Frame)的第一场序，驱动OLED光源20中的第三颜色子光源2013发光，在第二帧的第二场序，驱动OLED光源20中的第二颜色子光源2012发光。其中，第二帧的第一场序与第一帧的第二场序相邻。
S203、在每一场序，驱动液晶显示面板10中的液晶偏转，以使液晶显示面板10的像素单元101发出的光达到目标亮度值。
其中，第一帧以及第二帧构成一个驱动周期。在上述驱动方法中，通过重复该驱动周期，即可实现彩色场序显示。
为了方便说明，以下实施例均是以第一颜色子光源2011发出红(R)光，第三颜色子光源2013发出蓝(B)光为例进行的说明。
由于上述驱动方法，每一帧的第二场序(2nd Field)OLED光源20都通过第二颜色子光源2012发出绿光，因此，本方案只需两帧就可以构成一个驱动周期，并且由于每帧都被划分为两个场序，从而可以延长液晶的偏转时间，降低彩色场序显示对液晶响应时间的要求。
在此情况下，由于人眼对绿光较为敏感，因此在利用人眼对绿光较高的敏感度的基础上，以下通过具体的实施例对上述第二场序的设置驱动方法进行详细的说明，以使得作为背光源的OLED显示器提供的各种颜色的光分布均匀。
实施例一
如图3所示，在一个驱动周期内，第二颜色子光源2012发出的光的亮度为第一颜色子光源2011发出的光的亮度的二分之一，第一颜色子光源2011 发出的光的亮度与第三颜色子光源发出的光的亮度相同；第一场序和第二场序的时间相同。
这样一来，每一帧中，第二颜色子光源2012在第二场序均发出绿光。因此，在一帧中，第二颜色子光源2012发出的光与该帧的绿色数据相匹配，而该帧中没有的颜色，需要通过上一帧和下一帧的数据进行叠加来显示。例如，在第二帧在第一场序通过第三颜色子光源2013发出蓝光，第二场序通过第二颜色子光源2012发出绿光。由于第二帧OLED光源20没有发红光，因此第二帧的红光需要将第一帧的第一场序和第三帧的第一场序的红光数据进行叠加显示。
示例性地，可以将第一帧的第一场序和第三帧第一场序的红色亮度值进行相加并取平均值，以作为第二帧红色的亮度值。由于每帧的时间极短，因此通过将第一帧的第一场序中，第一颜色子光源2011发出的红光与第三帧的第一场序中，第一颜色子光源2011发出的红光进行叠加，以对第二帧中的红光进行补偿，从而实现RGB显示。
同理，第一帧中的蓝光，需要通过第零帧(0Frame)和第二帧中第三颜色子光源2013发出的蓝光进行叠加得到，具体的叠加方法同上所述，此处不再赘述。
由于每一帧的第二场序中，第一颜色子光源2011发出绿光的亮度均为红光或蓝光亮度的二分之一，因此整个OLED光源20提供的光源分布均匀。并且由于人眼对绿光有较高的敏感度，因此在极短的时间内，人眼不会感知到绿光的减少，从而可以在不影响显示效果的基础上，降低显示装置的功耗。
实施例二
如图4所示，在一个驱动周期内，OLED光源中的各颜色子光源发出的光的亮度相同，且第一场序的时间是第二场序时间的两倍。这样一来，每一帧中，第二颜色子光源2012在第二场序均发出绿光。因此，在一帧中，第二颜色子光源2012发出的光与该帧的绿色数据相匹配，而该帧中没有的颜色，需要通过上一帧和下一帧的数据进行叠加来显示。具体的叠加方式与实施例一相同，此处不再赘述。
由于每一帧的第二场序中，第一颜色子光源2011发出绿光的时间均为红光或蓝光亮度的二分之一，因此整个OLED光源20提供的光源分布均匀。 并且由于人眼对绿光有较高的敏感度，因此在极短的时间内，人眼不会感知到绿光的减少，从而可以在不影响显示效果的基础上，降低显示装置的功耗。
本发明实施例提供一种场序显示面板、场序显示装置及驱动方法，其中，该场序显示装置包括液晶显示面板，还包括：位于液晶显示面板入光侧的OLED光源，用于向液晶显示面板的像素单元提供三原色光；其中，OLED光源包括：多个三原色光源组，每个三原色光源组包括第一颜色子光源、第二颜色子光源和第三颜色子光源；每个子光源包括阳极、阴极以及位于阳极和阴极之间的发光层。这样一来，可以采用OLED光源作为液晶显示面板的三原色背光源，由于OLED光源能够精确控制各子光源的打开或关闭，因此相对于采用LED灯作为背光源的场序显示装置而言，灵活性更高，且能够降低场序显示装置的厚度。
此外，上述驱动方法包括：在第一帧的第一场序，驱动OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动OLED光源中的第二颜色子光源发光；在第二帧的第一场序，驱动OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动OLED光源中的第一颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；在第三帧的第一场序，驱动OLED光源中的第二颜色子光源发光，在第三帧的第二场序，驱动OLED光源中的第三颜色子光源发光；所述第三帧的第一场序与所述第二帧的第二场序相邻；在每一场序，驱动液晶显示面板中的液晶偏转，以使液晶显示面板的像素单元发出的光达到目标亮度值。其中，上述第一帧、第二帧以及第三帧构成一个驱动周期。这样一来，通过重复上述驱动周期就可以实现彩色场序显示，由于上述驱动方法中，每一帧只包括两个场序，因此液晶显示面板中的液晶，在每一帧只需要两次反转，即可实现彩色场序显示。所以相对于现有技术而言，在一帧时间内，液晶的反转次数减少，则液晶响应时间相对增大，从而降低了对液晶响应时间的要求。
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所述权利要求的保护范围为准。
本申请要求于2015年5月29日递交的中国专利申请第201510289387.1 号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (20)

  1. 一种场序显示面板，包括：
    下基板，包括衬底基板以及设置在所述衬底基板上的多个像素单元，所述多个像素单元的每个均包括薄膜晶体管；
    上基板；以及
    液晶层，位于所述下基板和所述上基板之间；
    OLED光源，设置在所述衬底基板远离所述薄膜晶体管的一侧，用于向所述多个像素单元的每个提供三原色光，
    其中，所述OLED光源包括：多个三原色光源组，每个三原色光源组包括第一颜色子光源、第二颜色子光源和第三颜色子光源，其中所述第一颜色、所述第二颜色和所述第三颜色是彼此不同的颜色。
  2. 根据权利要求1所述的场序显示面板，其中所述多个三原色光源组的每个对应于所述多个像素单元中多于一个像素单元。
  3. 根据权利要求1或2所述的场序显示面板，其中所述第一颜色、所述第二颜色和所述第三颜色分别为红色、绿色和蓝色或者分别为青色、品红色或黄色。
  4. 根据权利要求1或2所述的场序显示面板，其中所述第一颜色子光源、所述第二颜色子光源和所述第三颜色子光源中每个子光源包括阳极、阴极以及设置在所述阳极和所述阴极之间的发光层。
  5. 根据权利要求1或2所述的场序显示面板，其中每个所述像素单元的形状为正方形；所述衬底基板的厚度小于等于10倍所述像素单元的边长。
  6. 根据权利要求1或2所述的场序显示面板，其中所述多个三原色光源组的每个对应于4×4或5×5个所述像素单元。
  7. 根据权利要求6所述的场序显示面板，其中所述每个子光源还包括电子传输层、空穴传输层、电子注入层和空穴注入层。
  8. 一种场序显示装置，包括：
    液晶显示面板，包括：
    彼此对置的上基板和下基板；以及
    液晶层，设置在所述上基板与所述下基板之间；
    其中所述液晶显示面板包括多个像素单元，
    OLED光源，位于所述液晶显示面板入光侧，用于向所述液晶显示面板的所述多个像素单元的每个提供三原色光，
    其中，所述OLED光源包括：多个三原色光源组，每个三原色光源组包括第一颜色子光源、第二颜色子光源和第三颜色子光源，其中所述第一颜色、所述第二颜色和所述第三颜色是彼此不同的颜色。
  9. 根据权利要求8所述的场序显示装置，其中所述多个三原色光源组的每个对应于所述多个像素单元中多于一个像素单元。
  10. 根据权利要求8或9所述的场序显示装置，其中所述每个子光源包括阳极、阴极以及位于所述阳极和所述阴极之间的发光层。
  11. 根据权利要求8或9所述的场序显示装置，其中所述液晶显示面板中的所述多个像素单元的每个的形状为正方形；所述液晶显示面板与所述OLED光源之间的间距小于等于10倍所述像素单元的边长。
  12. 根据权利要求8或9所述的场序显示装置，其中所述第一颜色、所述第二颜色和所述第三颜色分别为红色、绿色和蓝色或者分别为青色、品红色或黄色。
  13. 根据权利要求8或9所述的场序显示装置，其中所述OLED光源为OLED显示面板，所述三原色光源组的每个为所述OLED显示面板的像素单元。
  14. 一种如权利要求1-7中任一项所述的场序显示面板或如权利要求8-13中任一项所述的场序显示装置的驱动方法，包括：
    在第一帧的第一场序，驱动所述OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动所述OLED光源中的第二颜色子光源发光；
    在第二帧的第一场序，驱动所述OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动所述OLED光源中的所述第一颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；
    在第三帧的第一场序，驱动所述OLED光源中的所述第二颜色子光源发光，在第三帧的第二场序，驱动所述OLED光源中的所述第三颜色子光源发光；所述第三帧的第一场序与所述第二帧的第二场序相邻；
    在第一场序和第二场序中的每一场序，驱动所述液晶层中的液晶偏转， 以使所述多个像素单元的每个发出的光达到目标亮度值；
    其中，所述第一帧、所述第二帧以及所述第三帧构成一个驱动周期。
  15. 根据权利要求14所述的驱动方法，其中所述第一场序和所述第二场序的时间相同。
  16. 根据权利要求14或15所述的驱动方法，其中在所述驱动周期，所述OLED光源中的各颜色子光源发出的光的亮度相同。
  17. 根据权利要求14所述的驱动方法，其中所述第一颜色子光源、所述第二颜色子光源以及所述第三颜色子光源发出的光分别为红色、绿色和蓝色。
  18. 一种如权利要求1-7中任一项所述的场序显示面板或如权利要求8-13中任一项所述的场序显示装置的驱动方法，所述驱动方法包括：
    在第一帧的第一场序，驱动所述OLED光源中的第一颜色子光源发光，在第一帧的第二场序，驱动所述OLED光源中的第二颜色子光源发光；
    在第二帧的第一场序，驱动所述OLED光源中的第三颜色子光源发光，在第二帧的第二场序，驱动所述OLED光源中的所述第二颜色子光源发光；所述第二帧的第一场序与所述第一帧的第二场序相邻；
    在每一场序，驱动所述液晶层中的液晶偏转，以使所述液晶层的所述多个像素单元的每个发出的光达到目标亮度值；
    其中，所述第一帧以及所述第二帧构成一个驱动周期。
  19. 根据权利要求18所述的驱动方法，其中在所述驱动周期，所述第二颜色子光源发出的光的亮度为所述第一颜色子光源发出的光的亮度的二分之一，所述第一颜色子光源发出的光的亮度与所述第三颜色子光源发出的光的亮度相同；所述第一场序和所述第二场序的时间相同。
  20. 根据权利要求19所述的驱动方法，其中在所述驱动周期，所述OLED光源中的各颜色子光源发出的光的亮度相同，且所述第一场序的时间是所述第二场序时间的两倍。
PCT/CN2015/092682 2015-05-29 2015-10-23 场序显示面板、场序显示装置及驱动方法 WO2016192278A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/039,673 US10127850B2 (en) 2015-05-29 2015-10-23 Field sequential display panel, field sequential display device and driving method using an organic light emitting diode (OLED) light source

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510289387.1A CN104820315B (zh) 2015-05-29 2015-05-29 一种场序显示面板、场序显示装置及驱动方法
CN201510289387.1 2015-05-29

Publications (1)

Publication Number Publication Date
WO2016192278A1 true WO2016192278A1 (zh) 2016-12-08

Family

ID=53730650

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/092682 WO2016192278A1 (zh) 2015-05-29 2015-10-23 场序显示面板、场序显示装置及驱动方法

Country Status (3)

Country Link
US (1) US10127850B2 (zh)
CN (1) CN104820315B (zh)
WO (1) WO2016192278A1 (zh)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104821161B (zh) * 2015-05-29 2018-05-08 京东方科技集团股份有限公司 一种场序显示面板的驱动方法、场序显示装置的驱动方法
CN104820315B (zh) * 2015-05-29 2018-06-05 京东方科技集团股份有限公司 一种场序显示面板、场序显示装置及驱动方法
US10706792B2 (en) * 2016-09-14 2020-07-07 Sharp Kabushiki Kaisha Field sequential type display device and display method
CN106324878B (zh) * 2016-10-31 2017-11-21 京东方科技集团股份有限公司 显示装置和控制显示装置的方法
CN106898703A (zh) * 2017-02-28 2017-06-27 昆山国显光电有限公司 显示装置及其制作方法
US10692417B2 (en) 2017-06-23 2020-06-23 Samsung Electronic Co., Ltd. Display apparatus
CN108206016B (zh) * 2018-01-02 2020-02-07 京东方科技集团股份有限公司 像素单元及其驱动方法、显示装置
CN108957862B (zh) * 2018-10-09 2022-05-10 京东方科技集团股份有限公司 透明显示装置和容器
TWI688945B (zh) * 2019-01-10 2020-03-21 友達光電股份有限公司 顯示裝置及驅動方法
CN110349549B (zh) * 2019-07-17 2022-07-05 京东方科技集团股份有限公司 液晶显示面板的驱动方法、驱动电路及显示装置
CN112014995A (zh) * 2020-09-15 2020-12-01 武汉华星光电技术有限公司 显示装置
CN113362776A (zh) * 2021-06-30 2021-09-07 北京京东方光电科技有限公司 一种场序显示装置、控制方法及显示设备
CN116052612A (zh) * 2023-02-16 2023-05-02 厦门天马微电子有限公司 显示面板的驱动方法、显示装置
CN116189625A (zh) * 2023-03-27 2023-05-30 厦门天马微电子有限公司 一种显示装置及其驱动方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101435935A (zh) * 2007-11-13 2009-05-20 上海广电Nec液晶显示器有限公司 双场序液晶显示器显示方法
US20100090937A1 (en) * 2008-10-09 2010-04-15 National Chiao Tung University Displaying Method for Field Sequential Color Displays Using Two Color Fields
CN101887183A (zh) * 2009-05-15 2010-11-17 斯坦雷电气株式会社 液晶显示装置
CN202813107U (zh) * 2012-10-12 2013-03-20 京东方科技集团股份有限公司 一种背光源及液晶显示器
CN104036739A (zh) * 2014-05-08 2014-09-10 深圳市华星光电技术有限公司 一种场序液晶显示驱动方法及显示装置
CN104820315A (zh) * 2015-05-29 2015-08-05 京东方科技集团股份有限公司 一种场序显示面板、场序显示装置及驱动方法
CN104821161A (zh) * 2015-05-29 2015-08-05 京东方科技集团股份有限公司 一种场序显示面板、场序显示装置及驱动方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3459721B2 (ja) 1995-05-22 2003-10-27 キヤノン株式会社 立体画像表示方法及びそれを用いた立体画像表示装置
KR100329237B1 (ko) * 1999-10-22 2002-03-21 구본준, 론 위라하디락사 칼라필터 불요형 칼라 액정표시소자
US7170482B2 (en) 2000-06-07 2007-01-30 Masaya Okita Color display device and method
JP2005077471A (ja) * 2003-08-28 2005-03-24 Casio Comput Co Ltd 液晶表示装置
US20060109397A1 (en) * 2004-11-24 2006-05-25 Organic Lighting Technologies Llc Organic light emitting diode backlight inside LCD
KR100788669B1 (ko) * 2005-11-02 2007-12-26 삼성전자주식회사 발광 디바이스 및 이를 광원으로 사용하는 백라이트 유닛및 이를 적용한 영역별 순차 구동방식 액정표시장치
WO2007138389A1 (en) * 2006-05-31 2007-12-06 Nokia Corporation Sample -and-hold display with impulse backlight
JP2008066366A (ja) * 2006-09-05 2008-03-21 Konica Minolta Holdings Inc 有機ｅｌデバイスを用いたフィールドシーケンシャル駆動ｌｃｄ用のバックライト
JP2008083073A (ja) 2006-09-25 2008-04-10 Toshiba Corp 立体表示装置および駆動方法
JP2008158454A (ja) * 2006-12-26 2008-07-10 Sony Corp 液晶表示装置
US20080204382A1 (en) * 2007-02-23 2008-08-28 Kevin Len Li Lim Color management controller for constant color point in a field sequential lighting system
US20080224973A1 (en) * 2007-03-16 2008-09-18 Tpo Displays Corp. Color Sequential Backlight Liquid Crystal Displays and Related Methods
WO2010140299A1 (ja) * 2009-06-03 2010-12-09 三菱電機株式会社 画像表示装置
JP5395180B2 (ja) * 2009-08-31 2014-01-22 シャープ株式会社 ドライバ装置、バックライトユニット、および画像表示装置
US9488862B2 (en) * 2013-02-12 2016-11-08 Apple Inc. Displays with organic light-emitting diode backlight structures
KR20140112741A (ko) * 2013-03-14 2014-09-24 삼성디스플레이 주식회사 표시 패널, 이의 구동 방법 및 이를 포함하는 표시 장치

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101435935A (zh) * 2007-11-13 2009-05-20 上海广电Nec液晶显示器有限公司 双场序液晶显示器显示方法
US20100090937A1 (en) * 2008-10-09 2010-04-15 National Chiao Tung University Displaying Method for Field Sequential Color Displays Using Two Color Fields
CN101887183A (zh) * 2009-05-15 2010-11-17 斯坦雷电气株式会社 液晶显示装置
CN202813107U (zh) * 2012-10-12 2013-03-20 京东方科技集团股份有限公司 一种背光源及液晶显示器
CN104036739A (zh) * 2014-05-08 2014-09-10 深圳市华星光电技术有限公司 一种场序液晶显示驱动方法及显示装置
CN104820315A (zh) * 2015-05-29 2015-08-05 京东方科技集团股份有限公司 一种场序显示面板、场序显示装置及驱动方法
CN104821161A (zh) * 2015-05-29 2015-08-05 京东方科技集团股份有限公司 一种场序显示面板、场序显示装置及驱动方法

Also Published As

Publication number Publication date
US20170110043A1 (en) 2017-04-20
US10127850B2 (en) 2018-11-13
CN104820315A (zh) 2015-08-05
CN104820315B (zh) 2018-06-05

Similar Documents

Publication Publication Date Title
WO2016192278A1 (zh) 场序显示面板、场序显示装置及驱动方法
US9898972B2 (en) Field-sequential display panel, field-sequential display apparatus and driving method
CN104932137B (zh) 一种彩膜基板、阵列基板、显示面板及显示装置
TWI390495B (zh) 色序背光式液晶顯示器及相關方法
US9892673B2 (en) Display substrate, display apparatus and driving method thereof
CN103855187B (zh) 有机发光显示装置
CN104517998B (zh) 显示装置
WO2017219414A1 (zh) 微发光二极管显示面板
CN107359176A (zh) 一种有机发光显示面板及显示装置
CN103869569A (zh) 显示装置
US10204575B2 (en) Display panel and display device
WO2019100420A1 (zh) 显示面板及具有该显示面板的显示装置
US9286837B2 (en) Display device and driving method thereof
US20130321495A1 (en) Display device
CN103943059A (zh) 一种有机电致发光显示器及驱动方法
CN101551979A (zh) 户外可读液晶显示装置
KR20190055642A (ko) 표시패널
US20170309858A1 (en) Display device
TW201621423A (zh) 顯示裝置、顯示裝置之驅動方法
CN109065568A (zh) 一种woled面板和woled显示装置
TW201517260A (zh) 主動式矩陣有機發光二極體畫素結構
CN109581723B (zh) 一种显示面板和显示装置
US9601066B2 (en) Field sequential display including primary color sub-pixels, a transparent sub-pixel, and differently-colored light sources
US20110148310A1 (en) Field emission lamp
CN105789265A (zh) 一种显示装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 15039673

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15893926

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15893926

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 25/04/2018)

122 Ep: pct application non-entry in european phase

Ref document number: 15893926

Country of ref document: EP

Kind code of ref document: A1