WO2020224314A1 - Module d'affichage séquentiel de champ, dispositif d'affichage et procédé de commande pour module d'affichage séquentiel de champ - Google Patents

Module d'affichage séquentiel de champ, dispositif d'affichage et procédé de commande pour module d'affichage séquentiel de champ Download PDF

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Publication number
WO2020224314A1
WO2020224314A1 PCT/CN2020/077431 CN2020077431W WO2020224314A1 WO 2020224314 A1 WO2020224314 A1 WO 2020224314A1 CN 2020077431 W CN2020077431 W CN 2020077431W WO 2020224314 A1 WO2020224314 A1 WO 2020224314A1
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WIPO (PCT)
Prior art keywords
substrate
field sequential
panel
area adjustment
display module
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Application number
PCT/CN2020/077431
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English (en)
Chinese (zh)
Inventor
孙川
汪志强
董学
时凌云
王雪绒
陈雷
马鑫
芮博超
王秋里
姚建峰
杨超
胡国锋
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
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Publication of WO2020224314A1 publication Critical patent/WO2020224314A1/fr

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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
    • G09G3/34—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
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or 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
    • 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
    • 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

Definitions

  • the embodiments of the present disclosure relate to the field of display technology, in particular, to a field sequential display module, a display device, and a control method of the field sequential display module.
  • LCD Liquid Crystal Display
  • TFT Thin Film Transistor
  • the color film layer is provided on the upper glass substrate. The signal and voltage on the TFT are changed to control the rotation direction of the liquid crystal molecules, so as to control whether the polarized light of each pixel point is emitted or not to achieve the purpose of display.
  • Contrast is an important indicator of liquid crystal display panels.
  • the control ICs, filters and alignment films used in LCD manufacturing are all related to the contrast of liquid crystal display panels.
  • a field sequential display module including:
  • Backlight module used to turn on or off multiple monochromatic lights in cycles
  • An area adjustment panel located on the backlight module;
  • a display panel the display panel is located on the side of the area adjustment panel away from the backlight module,
  • the area adjustment panel is used to adjust the transmittance of light, and the orthographic projection of a positive integer number of pixels on the display panel on the area adjustment panel and one pixel on the area adjustment panel are in the same position.
  • the orthographic projections on the area adjustment panel coincide.
  • the field sequential display module does not include a color filter layer.
  • the orthographic projection of a pixel on the display panel on the area adjustment panel coincides with the orthographic projection of a pixel on the area adjustment panel on the area adjustment panel.
  • an upper polarizer is provided on the side of the display panel facing away from the area adjustment panel, and a lower polarizer is provided on the side of the area adjustment panel facing the backlight module.
  • the backlight module includes a plurality of light emitting diodes.
  • the plurality of light emitting diodes include red light diodes, green light diodes, and blue light diodes.
  • the backlight module includes a plurality of sub-millimeter light emitting diodes.
  • the plurality of sub-millimeter light-emitting diodes include red sub-millimeter light-emitting diodes, green sub-millimeter light-emitting diodes, and blue sub-millimeter light-emitting diodes.
  • the display panel includes:
  • a first substrate and a second substrate disposed oppositely;
  • a first liquid crystal layer located between the first substrate and the second substrate;
  • a plurality of thin film transistors arranged in a matrix arranged on the side of the second substrate facing the first liquid crystal layer;
  • the area adjustment panel includes:
  • a third substrate and a fourth substrate disposed oppositely;
  • a second liquid crystal layer located between the third substrate and the fourth substrate.
  • the fourth substrate is arranged on a side of the first substrate away from the first liquid crystal layer.
  • the thin film transistor provided on the fourth substrate is used to drive the second liquid crystal layer to control the light transmission ratio of each frame, and the thin film transistor provided on the second substrate is used for The first liquid crystal layer is driven to control the display of a monochrome image.
  • the display panel includes:
  • a first substrate and a second substrate disposed oppositely;
  • a first liquid crystal layer located between the first substrate and the second substrate;
  • a plurality of thin film transistors arranged in a matrix arranged on the side of the second substrate facing the first liquid crystal layer;
  • the area adjustment panel includes:
  • a third substrate arranged opposite to the first substrate
  • a second liquid crystal layer located between the first substrate and the third substrate.
  • a plurality of thin film transistors arranged in a matrix are arranged on the side of the third substrate facing the second liquid crystal layer.
  • the thin film transistor provided on the third substrate is used to drive the second liquid crystal layer to control the light transmission ratio of each frame, and the thin film transistor provided on the second substrate is used for The first liquid crystal layer is driven to control the display of a monochrome image.
  • the display panel further includes transparent conductive films disposed on both sides of the first liquid crystal layer, and the area adjustment panel further includes transparent conductive films disposed on both sides of the second liquid crystal layer.
  • the display panel and the area adjustment panel are adjusted independently of each other.
  • an embodiment of the present disclosure provides a display device including the field sequential display module according to any one of the first aspect of the present disclosure.
  • an embodiment of the present disclosure provides a method for controlling a field sequential display module for controlling the field sequential display module according to any one of the first aspect of the present disclosure, including:
  • the display panel obtains the video signal, and converts the image frames in the video signal into three basic monochrome image frames;
  • the area adjustment panel adjusts the brightness of each pixel included in the area adjustment panel according to a predetermined algorithm
  • the backlight module receives the light source control signal from the display panel, turns on or off the monochromatic light, so as to control the display or turn off of the basic monochromatic image frame.
  • the predetermined algorithm includes identifying gray levels on different regions of the image frame, and adjusting the brightness of each pixel according to a result of the gray level recognition.
  • acquiring the video signal by the display panel, and converting the image frames in the video signal into three basic monochrome image frames includes: a lighting machine sends the video signal to the The flexible circuit board of the display panel, the chip in the display panel converts the image frame in the video signal into three basic monochrome image frames, wherein the monochrome image frame rate is 3 times the color display frame rate.
  • the signal of the area adjustment panel is generated by the chip of the display panel, or the signal of the area adjustment panel is directly generated by the lighting machine.
  • FIG. 1 is a schematic structural diagram of a field sequential display module provided by an embodiment of the disclosure
  • FIG. 2 is a schematic structural diagram of a field sequential display module provided by an embodiment of the disclosure.
  • FIG. 3 is a schematic structural diagram of a display panel and an area adjustment panel provided by an embodiment of the disclosure
  • FIG. 4 is a schematic structural diagram of a display panel and an area adjustment panel provided by an embodiment of the disclosure
  • FIG. 5 is a flowchart of a method for controlling a field sequential display module provided by an embodiment of the disclosure
  • FIG. 6 is a schematic diagram of the principle of a field sequential display control method provided by an embodiment of the disclosure.
  • FIG. 7 is a schematic diagram of the principle of a field sequential display control method provided by an embodiment of the disclosure.
  • the present application provides a field sequential display module, a display device, and a control method of the field sequential display module.
  • the field sequential display refers to the use of RGB backlight, and the backlight R, G, and B are cyclically lit, and color display can be realized without a color film.
  • an embodiment of the present disclosure provides a field sequential display module.
  • the field sequential display module includes: a display panel (Display Panel) 100, and a regional adjustment panel (Local Dimming Panel) 200 ⁇ Backlight module 300.
  • the display panel 100 is stacked on the area adjustment panel 200, and the area adjustment panel 200 is used to adjust the light transmittance.
  • the orthographic projection of a positive integer number of pixels on the display panel 100 on the area adjustment panel 200 coincides with one pixel on the area adjustment panel 200.
  • the backlight module 300 is disposed on the side of the area adjustment panel 200 that faces away from the display panel 100, and is used to cyclically turn on or turn off the monochromatic light so as to display an image on the display panel 100.
  • the field sequential display module provided by the embodiments of the present disclosure realizes color display by cyclically turning on or turning off the monochromatic light by the backlight module.
  • the display panel 100 does not need to be separately provided with a color film layer, thereby improving the light transmittance of the screen. Compared with the way of realizing color display with color film, it can reduce the power consumption of the device while ensuring the display effect.
  • the field sequential display module provided in the embodiment of the present disclosure includes a display panel 100 and an area adjustment panel 200.
  • the display panel 100 and the area adjustment panel 200 can be adjusted independently, and the cooperation between the display panel 100 and the area adjustment panel 200 can achieve transparency.
  • the coordination of the overrate adjustment and the display effect can achieve high contrast and high transmittance; because the positive integer number of pixels on the display panel 100 is projected on the area adjustment panel 200 and the area adjustment panel 200 is overlapped with a pixel point on the area adjustment panel 200, In addition, the display panel 100 and the area adjustment panel 200 will not affect each other during display, which is closer to the display effect of the organic light emitting display panel.
  • n pixels on the display panel 100 correspond to one pixel point on the area adjustment panel 200, where n is 1, 2, 3... and other positive integers.
  • n is 1, 2, 3... and other positive integers.
  • the contour shape of the rectangular pixel point is just the contour shape formed by the splicing of two small squares.
  • the above example is only to illustrate the correspondence between the pixels on the area adjustment panel 200 and the pixels on the display panel 100, and does not mean that the pixels must be square or rectangular, and may also be circles, triangles, or polygons.
  • the pixel points correspond to the pixel points of the area adjustment panel 200 in a one-to-one manner.
  • the color depth of each screen is 8bit and can generate 0-255 gray scales
  • the color of the field sequential display module provided by the embodiment of the present disclosure
  • the depth is 8bit*8bit, that is, 0-65535 grayscale.
  • n>1 a single pixel on the screen cannot achieve high color depth, but the regional adjustment (Local Dimming) effect can be achieved according to the algorithm.
  • the fineness of the partition is related to the value of n. The smaller the value of n, the finer the effect of Local Dimming. The lower the transmittance of the adjustment panel 200 is. Therefore, in the design process, it is necessary to balance the local Dimming requirements and the power consumption requirements of the module according to the actual application, and adjust the area to adjust the light transmittance of the panel 200.
  • the luminance meter when adjusting the grayscale brightness, the luminance meter is placed above the field sequential display module, and the grayscale brightness is adjusted by changing the liquid crystal deflection voltage under different grayscales of the field sequential display module. Since the display panel 100 and the area adjustment panel 200 can be individually lit, the adjustment of the Gamma curve is the same as that of a conventional TFT-LCD, but the Gamma curve of the display panel 100 and the area adjustment panel 200 can be overlapped more easily.
  • the display panel 100 is provided with an upper polarizer 140 on the side facing the area adjustment panel 200, and the area adjustment panel 200 is provided with a lower polarizer 240 on the side facing the backlight module 300.
  • the backlight module 300 includes several light emitting diodes (LED) 310 or several millimeter light emitting diodes (mini LED) 320. Since the sub-millimeter light-emitting diode 320 can be partially lit, its partitioned display effect will be better, which is more conducive to the function of the area adjustment panel 200 and produces a better display effect.
  • LED light emitting diodes
  • mini LED millimeter light emitting diodes
  • the light-emitting color of the light-emitting diode is red (R), green (G) or blue (B); or, the light-emitting color of the sub-millimeter light-emitting diode used is red, green or blue. Since the field sequential display module provided by the embodiment of the present disclosure does not use a color film, the color display is realized by the combination of three monochromatic lights.
  • the backlight module 300 includes light emitting diodes 310;
  • the display panel 100 includes: a first substrate 110 and a second substrate 130 disposed opposite to each other, and a first substrate located between the first substrate 110 and the second substrate 130;
  • the liquid crystal layer 120 and the upper polarizer 140 disposed on the side of the second substrate 130 facing away from the first liquid crystal layer 120, wherein the first substrate 110 is on the bottom and the second substrate 130 is on the top;
  • the area adjustment panel 200 includes: a third substrate 210 , The second liquid crystal layer 220 located between the third substrate 210 and the first substrate 110 of the display panel 100, and the lower polarizer 240 disposed on the side of the third substrate 210 facing away from the second liquid crystal layer 220, wherein the third substrate 210 is below, and the area adjustment panel 200 shares the first substrate 110 of the display panel 100.
  • the area adjustment panel 200 is disposed between the backlight module 300 and the display panel 100.
  • the difference between the field sequential display module in FIG. 2 and the field sequential display module in FIG. 1 is that the backlight module 300 uses sub-millimeter light emitting diodes 320 instead of light emitting diodes 310.
  • the display panel 100 includes: a first substrate 110 and a second substrate 130 disposed oppositely, and a first liquid crystal located between the first substrate 110 and the second substrate 130.
  • a plurality of thin film transistors 150 (schematically shown) arranged in a matrix are provided on the side of the second substrate 130 facing the first liquid crystal layer 120.
  • the area adjustment panel 200 includes: a third substrate 210 and a fourth substrate 230 disposed opposite to each other, and a second liquid crystal layer 220 located between the third substrate 210 and the fourth substrate 230.
  • the fourth substrate 230 faces the second liquid crystal layer 220.
  • a number of thin film transistors 250 (schematically shown) arranged in a matrix are arranged on one side; the fourth substrate 230 is arranged on the side of the first substrate 110 away from the first liquid crystal layer 120.
  • the manufacturing process of the field sequential display module provided in this embodiment includes: separately manufacturing the display panel 100 and the area adjustment panel 200, and then accurately align the respective pixels of the display panel 100 and the area adjustment panel 200.
  • the field sequential display module provided by the embodiment of the present disclosure includes 2 liquid crystal layers and 2 thin film transistors arranged in a matrix.
  • the thin film transistor 250 provided on the fourth substrate 230 controls the light transmission ratio of each frame of the picture to realize the local Dimming effect.
  • the thin film transistor 150 provided on the second substrate 130 is used to control the display of red, green and blue monochromatic images, combined with the backlight module 300 that can make the red, green and blue monochromatic light cyclically lit, the field of the embodiment of the present disclosure
  • the sequential display module has the characteristics of high contrast, high color depth, and high transmittance. It can be combined with image processing algorithms to use liquid crystal display (LCD) to achieve high dynamic range image (High-Dynamic Range, referred to as HDR) effects, compared with ordinary The image can provide more dynamic range and image details.
  • LCD liquid crystal display
  • HDR High-Dynamic Range
  • the display panel 100 includes: a first substrate 110 and a second substrate 130 disposed opposite to each other, and a first substrate 110 and a second substrate 130 located between the first substrate 110 and the second substrate 130.
  • a number of thin film transistors 150 arranged in a matrix are provided on the side of the second substrate 130 facing the first liquid crystal layer 120.
  • the area adjustment panel 200 includes a third substrate 210 disposed opposite to the first substrate 110, and a second liquid crystal layer 220 located between the first substrate 110 and the third substrate 210.
  • the third substrate 210 faces the second liquid crystal layer 220.
  • a number of thin film transistors 250 arranged in a matrix are provided on one side.
  • the manufacturing process of the field sequential display module provided in this embodiment includes: after the manufacturing of the display panel 100 is completed, an alignment film is disposed on the underside of the first substrate 110, and then a third substrate 210 including a plurality of thin film transistors arranged in a matrix is manufactured. Then, the first substrate 110 and the third substrate 210 are aligned, and the pixel points corresponding to the display panel 100 and the area adjustment panel 200 need to be accurately aligned during the assembly process.
  • the number of substrates used in the field sequential display module provided by this embodiment is small, which can make the field sequential display module lighter and thinner.
  • the second substrate 130 provided by the embodiment of the present disclosure may use a glass substrate for aligning with the first substrate 110 below, so as to be between the first substrate 110 and the second substrate 130.
  • the liquid crystal layer is formed.
  • the field sequential display module includes two liquid crystal layers and two thin film transistors arranged in a matrix. The thin film transistors respectively drive corresponding layers of liquid crystal.
  • the thin film transistors arranged on the second substrate 130 are used to drive the first liquid crystal layer 120, as shown in FIG. 3
  • the thin film transistor provided on the fourth substrate 230 in the middle or the thin film transistor provided on the third substrate 210 in FIG. 4 is used to drive the second liquid crystal layer 220.
  • RGB chips are packaged in the backlight module 300, which can drive R, G, and B monochromatic lights to light up respectively.
  • the display panel 100 and the area adjustment panel 200 are also provided with a transparent conductive film 400 and an orientation layer.
  • the transparent conductive film 400 can be made of ITO (tin doped indium trioxide) or AZO (aluminum doped Hetero zinc oxide) and so on.
  • ITO titanium oxide
  • AZO aluminum doped Hetero zinc oxide
  • the thin film transistor matrix design in this solution is the same as the existing thin film transistor matrix design process, and no special process is required to realize it.
  • the first substrate 110, the second substrate 130, the third substrate 210, the fourth substrate 230, etc. described above can all be made of glass substrates.
  • a display device in a second aspect of the embodiments of the present disclosure, includes the field sequential display module in each of the embodiments provided in the first aspect of the present disclosure.
  • the light transmittance of the screen in the display device provided by the embodiment of the present disclosure is high, and compared with the way of realizing color display with a color film, the device has lower power consumption on the basis of a good display effect.
  • the display panel 100 and the area adjustment panel 200 included in the display device can be adjusted independently.
  • the cooperation between the display panel 100 and the area adjustment panel 200 can achieve the coordination of transmittance adjustment and display effect, and can better adapt to the actual situation of different use occasions. Usage requirements.
  • the embodiments of the present disclosure provide a method for controlling the field sequential display module, which is used to control the field sequential display module as described in the various embodiments provided in the first aspect of the present disclosure, as shown in FIG. 5,
  • the control method includes:
  • the display panel 100 obtains the video signal, and converts the image frames in the video signal into three basic monochrome image frames;
  • the area adjustment panel 200 adjusts the brightness of each pixel included in the area adjustment panel 200 according to a predetermined algorithm
  • the backlight module 300 receives the light source control signal from the display panel 100, and turns on or off the monochromatic light to control the display or turn off of the basic monochromatic image frame.
  • the lighter when displaying a frame of H ⁇ W (height ⁇ width) image, the lighter sends a video signal to the flexible circuit board (FPC) of the display panel 100, and the chip (IC) in the display panel 100 converts the video
  • the image frame in the signal is converted into three kinds of monochrome image frame display of R, G, B.
  • the monochrome image frame rate is required to be 3 times the color display frame rate, that is, when the screen display frame rate is 60Hz, monochrome image is required
  • the frame rate is 180Hz.
  • the signal of the area adjustment panel 200 is generated by the IC of the display panel 100, as shown in FIG. 6, or the signal of the area adjustment panel 200 is directly generated by the lighting machine, as shown in FIG. 7, the generated signal of the area adjustment panel 200 is sent to The area adjusts the FPC of the panel 200.
  • the area adjustment panel 200 adjusts the brightness of each pixel on the area adjustment panel 200 based on the image to be displayed, and presents the corresponding grayscale image generated by the algorithm.
  • the resolution of the area adjustment panel 200 is H/n ⁇ W/n, where n represents the number of pixels in each Local Dimming partition, n ⁇ 1. Since the grayscale image of the area adjustment panel 200 is also expressed as low grayscale at the low grayscale of the displayed image, and high grayscale is also expressed as high grayscale at the high grayscale, the difference between light and dark of the displayed image is more obvious, thus improving The role of LCD contrast.
  • the predetermined algorithm used in the area adjustment panel 200 includes grayscale recognition on different areas of the image frame, and adjusts the brightness of each pixel according to the result of the grayscale recognition, that is, the predetermined algorithm can Recognize the picture, adjust the gray scale of each area on the image frame adaptively according to the picture content, and further improve the fineness of contrast adjustment.
  • the light bar of the backlight module 300 receives the light source (LED) on or off signal from the display panel 100.
  • LED light source
  • the red chip in the backlight module 300 is turned on to emit light, and the blue and green chips are turned off and do not emit light.
  • the display of blue and green images is the same as the above, so that the color display of the image is realized in the entire field sequential display module range.
  • UP POL is the upper polarizer
  • Down Pol is the lower polarizer
  • BLU is the backlight module
  • CF is the color film layer
  • LC is the liquid crystal layer
  • GLASS is the glass substrate.
  • the screen transmittance is calculated to be about 5%.
  • the LED luminous efficiency of the RGB chip in the backlight module 300 is about 70% of that of the white LED.
  • the transmittance is about 9%, which theoretically increases the transmittance by 80% compared to traditional liquid crystal display modules. If n>1, that is, the number of Local Dimming partitions is smaller than the screen resolution of the display panel 100, the transmittance can be further improved.
  • Color display is realized by using the backlight module to cyclically turn on or turn off the monochromatic light.
  • the display panel does not need to be separately provided with a color film layer, which improves the light transmittance of the screen. Compared with the color display method using color film, it can On the basis of ensuring the display effect, the power consumption of the LCD is reduced; furthermore, the display panel and the area adjustment panel in the field sequential display module provided by the embodiments of the present disclosure can be adjusted independently, and the two can cooperate to achieve transmittance adjustment Coordination with the display effect can achieve high contrast and high transmittance, so that the field sequential display module can better adapt to the needs of different use occasions.
  • the display panel and the area adjustment panel will not affect each other during display, which is closer to organic light emitting display.
  • the display effect of the panel since the orthographic projection of a positive integer number of pixels on the display panel on the area adjustment panel coincides with a pixel point on the area adjustment panel, the display panel and the area adjustment panel will not affect each other during display, which is closer to organic light emitting display. The display effect of the panel.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
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  • Liquid Crystal Display Device Control (AREA)
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Abstract

La présente invention concerne un module d'affichage séquentiel de champ, un dispositif d'affichage et un procédé de commande pour le module d'affichage séquentiel de champ. Le module d'affichage séquentiel de champ comprend : un module de rétroéclairage (300) utilisé pour allumer ou éteindre cycliquement une pluralité de lumières monochromatiques ; un panneau de réglage de région (200) qui est situé sur le module de rétroéclairage (300) ; et un écran d'affichage (100) qui est situé sur un côté du panneau de réglage de région (200) à l'opposé du module de rétroéclairage (300), le panneau de réglage de région (200) étant utilisé pour ajuster la transmittance de la lumière, et une projection orthographique d'un nombre entier positif de points de pixel sur l'écran d'affichage (100) sur le panneau de réglage de région (200) coïncide avec une projection orthographique d'un point de pixel sur le panneau de réglage de région (200) sur le panneau de réglage de région (200).
PCT/CN2020/077431 2019-05-05 2020-03-02 Module d'affichage séquentiel de champ, dispositif d'affichage et procédé de commande pour module d'affichage séquentiel de champ WO2020224314A1 (fr)

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