WO2017092131A1 - 彩膜基板的制作方法及液晶显示装置 - Google Patents

彩膜基板的制作方法及液晶显示装置 Download PDF

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WO2017092131A1
WO2017092131A1 PCT/CN2015/099620 CN2015099620W WO2017092131A1 WO 2017092131 A1 WO2017092131 A1 WO 2017092131A1 CN 2015099620 W CN2015099620 W CN 2015099620W WO 2017092131 A1 WO2017092131 A1 WO 2017092131A1
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green
film
red
light
filter
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PCT/CN2015/099620
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English (en)
French (fr)
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李吉
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深圳市华星光电技术有限公司
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Priority to US14/908,121 priority Critical patent/US9964797B2/en
Publication of WO2017092131A1 publication Critical patent/WO2017092131A1/zh

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    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • G—PHYSICS
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    • 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
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    • 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
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    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • G—PHYSICS
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    • 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
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    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
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    • 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
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    • G—PHYSICS
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    • G—PHYSICS
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    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for fabricating a color filter substrate and a liquid crystal display device.
  • Quantum Dots refer to semiconductor grains having a particle size of 1-100 nm. Since the particle size of the QDs is small, the quantum Boolean effect is smaller or closer to the exciton Bohr radius of the corresponding bulk material, and the continuous energy band structure of the bulk material is transformed into a discrete energy level structure, which is excited by the external light source. The electrons will transition and emit fluorescence.
  • quantum dot materials has the advantages of concentrated luminescence spectrum, high color purity, and easy adjustment of the luminescent color by the size, structure or composition of the quantum dot material, which can be effectively applied to display devices to effectively increase the color gamut of the display device and Color reproduction ability.
  • the most common method is to use blue LED as the backlight.
  • the blue backlight is red and green after passing through the red quantum dot film and the green quantum dot film.
  • the transparent layer is blue
  • the three primary colors (red and green) are used. , blue) mixed to display color.
  • the quantum dot material can improve the display effect of the display panel, it only stays in the three primary color display technology, but the three primary color display cannot actually display all the colors in nature.
  • red (R, Red), green (G, Green), blue (B, Blue) in the three primary color display, and this is
  • the added new primary colors fall on the chromaticity diagram outside the triangular gamut space surrounded by red, green and blue primary colors, such as cyan (C, Cyan), that is, the four primary color display technology, wherein the blue light can be composed of green light and The mixed light of blue light is obtained.
  • C, Cyan cyan
  • the four primary colors are provided by the filter film composed of the corresponding pigment or dye, the light utilization efficiency is not high, and the color effect is not satisfactory.
  • research on the application of quantum dot materials in four-color display technology is still immature.
  • the object of the present invention is to provide a method for fabricating a color filter substrate, which utilizes the characteristics of the quantum dot material to form a color film layer including red, green, cyan, and blue filter layers on the substrate, and can be used for realizing
  • the four primary colors of the display device increase the quantum dot utilization while effectively increasing the display gamut range.
  • the object of the present invention is to provide a liquid crystal display device comprising a backlight module and a color film layer, and combining the blue backlight and the color film layer to form a four primary color display by utilizing the characteristics of the quantum dot material, thereby improving quantum dot utilization. At the same time, the range of the display gamut is effectively improved.
  • the present invention provides a method of fabricating a color filter substrate, comprising the steps of:
  • Step 1 Providing a base substrate on which a black matrix is formed, and the black matrix encloses a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, and a plurality of cyan sub-pixel regions on the base substrate And a plurality of blue sub-pixel regions;
  • Step 2 forming a red filter film and a green filter film in the red sub-pixel region and the green sub-pixel region on the base substrate;
  • Step 3 forming a red quantum dot film in the red sub-pixel region on the base substrate, forming a green quantum dot film in the green sub-pixel region and the cyan sub-pixel region on the base substrate;
  • a color film layer is formed on the substrate, and the color film layer includes a plurality of red, green, and corresponding sub-pixel regions respectively corresponding to a plurality of red, green, cyan, and blue sub-pixel regions.
  • the red filter layer comprises a red filter film and a red quantum dot film on the red filter film;
  • the green filter layer comprises a green filter film, and is located on the green filter film a green quantum dot film;
  • the cyan filter layer comprises a green quantum dot film;
  • the blue filter layer does not comprise any material or comprises a transparent material film.
  • the black matrix formed on the base substrate has a thickness of 1 to 3 ⁇ m.
  • a red filter film and a green filter film are formed by a photolithography process or an inkjet printing process; in the step 3, a red quantum dot film is formed by a photolithography process or an inkjet printing process, And green quantum dot film.
  • the red quantum dot film emits red light having a peak of 620-640 nm and a half-wave width of 30-40 nm under photoexcitation; the green quantum dot film emits a peak of 520-540 nm and a half-wave width of 30 under light excitation.
  • the red filter film has a wavelength in the range of 620-780 nm
  • the light transmittance is 95.8% or more, and the transmittance of light having a wavelength in the range of 430 to 570 nm is 0.2% or less; and the transmittance of the green filter film to light having a wavelength in the range of 486 to 560 nm is 90% or more, the transmittance of light having a wavelength in the range of 640 to 730 nm is 50% or less.
  • the present invention also provides a liquid crystal display device comprising a liquid crystal display panel and a backlight module located below the liquid crystal display panel;
  • the liquid crystal display panel includes an upper substrate and a lower substrate disposed opposite to each other, a liquid crystal layer disposed between the upper substrate and the lower substrate, an upper polarizer disposed above the upper substrate, and a lower polarizer disposed on the lower substrate Lower polarizer below;
  • the upper substrate includes a first substrate, a black matrix and a color film layer disposed on a side of the first substrate adjacent to the liquid crystal layer, and a common electrode disposed on the black matrix and the color film layer a layer, a first alignment film disposed on the common electrode layer;
  • the black matrix encloses a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, a plurality of cyan sub-pixel regions, and a plurality of blue sub-pixel regions on the first substrate, the color film layer a plurality of red, green, cyan, and blue filter layers respectively corresponding to a plurality of red, green, cyan, and blue sub-pixel regions;
  • the red filter layer comprises a red filter film and a red quantum dot film on the red filter film;
  • the green filter layer comprises a green filter film, and is located on the green filter film a green quantum dot film;
  • the cyan filter layer comprises a green quantum dot film;
  • the blue filter layer does not comprise any material or comprises a transparent material film;
  • the light emitted by the backlight module is blue light
  • the red quantum dot film emits red light under blue light excitation, and the green quantum dot film emits green light under blue light excitation;
  • the backlight blue light passes through the red quantum dot film of the red filter layer, and then emits a mixed light of blue light and red light, and is filtered by the red filter film to emit red light and red.
  • the blue light After passing through the green quantum dot film of the green filter layer, the blue light emits a mixture of blue light and green light, and after passing through the green filter film, emits green light and becomes green, and the backlight blue light passes through the green quantum dot of the cyan filter layer.
  • a mixed light of blue light and green light is emitted to display cyan, and the backlight blue light passes through the blue filter layer to be blue, thereby realizing display of red, green, blue and blue primary colors.
  • the lower substrate includes a second substrate, a TFT layer disposed on a side of the second substrate adjacent to the liquid crystal layer, a pixel electrode layer on the TFT layer, and a pixel electrode disposed on the pixel electrode a second alignment film on the layer.
  • the black matrix has a thickness of 1 to 3 ⁇ m.
  • the red quantum dot film emits red light having a peak of 620-640 nm and a half-wave width of 30-40 nm under photoexcitation; the green quantum dot film emits a peak of 520-540 nm under photoexcitation, Green light having a half-wave width of 30 to 40 nm; the transmittance of the red filter film to light having a wavelength in the range of 620 to 780 nm is 95.8% or more, and the transmittance of light having a wavelength in the range of 430 to 570 nm.
  • the transmittance of the green filter film to light having a wavelength in the range of 486 to 560 nm is 90% or more, and the transmittance of light having a wavelength in the range of 640 to 730 nm is 50% or less.
  • the present invention also provides a liquid crystal display device comprising a liquid crystal display panel and a backlight module located below the liquid crystal display panel;
  • the liquid crystal display panel includes an upper substrate and a lower substrate disposed opposite to each other, a liquid crystal layer disposed between the upper substrate and the lower substrate, an upper polarizer disposed above the upper substrate, and disposed under the lower substrate Lower polarizer;
  • the upper substrate includes a first substrate, a black matrix and a color film layer disposed on a side of the first substrate adjacent to the liquid crystal layer, and a common electrode disposed on the black matrix and the color film layer a layer, a first alignment film disposed on the common electrode layer;
  • the black matrix encloses a plurality of red sub-pixel regions, a plurality of green sub-pixel regions, a plurality of cyan sub-pixel regions, and a plurality of blue sub-pixel regions on the first substrate, the color film layer a plurality of red, green, cyan, and blue filter layers respectively corresponding to a plurality of red, green, cyan, and blue sub-pixel regions;
  • the red filter layer comprises a red filter film and a red quantum dot film on the red filter film;
  • the green filter layer comprises a green filter film, and is located on the green filter film a green quantum dot film;
  • the cyan filter layer comprises a green quantum dot film;
  • the blue filter layer does not comprise any material or comprises a transparent material film;
  • the light emitted by the backlight module is blue light
  • the red quantum dot film emits red light under blue light excitation, and the green quantum dot film emits green light under blue light excitation;
  • the backlight blue light passes through the red quantum dot film of the red filter layer, and then emits a mixed light of blue light and red light, and is filtered by the red filter film to emit red light and red.
  • the blue light After passing through the green quantum dot film of the green filter layer, the blue light emits a mixture of blue light and green light, and after passing through the green filter film, emits green light and becomes green, and the backlight blue light passes through the green quantum dot of the cyan filter layer.
  • the mixed light of blue light and green light is emitted to display cyan, and the backlight blue light passes through the blue filter layer to be blue, thereby realizing display of red, green, blue and blue primary colors;
  • the lower substrate includes a second substrate, a TFT layer disposed on a side of the second substrate adjacent to the liquid crystal layer, a pixel electrode layer on the TFT layer, and a second alignment film on the pixel electrode layer;
  • the black matrix has a thickness of 1 to 3 ⁇ m
  • the red quantum dot film emits a peak of 620-640 nm under light excitation, and has a half-wave width. It is red light of 30-40 nm; the green quantum dot film emits green light with a peak of 520-540 nm and a half-wavelength of 30-40 nm under photoexcitation; the red filter film has a wavelength range of 620-780 nm.
  • the transmittance of light is 95.8% or more, and the transmittance of light having a wavelength in the range of 430 to 570 is 0.2% or less; and the transmittance of the green filter film to light having a wavelength in the range of 486 to 560 nm
  • the transmittance of light having a wavelength in the range of 640 to 730 nm is 50% or less, which is 90% or more.
  • the present invention provides a method of fabricating a color filter substrate and a liquid crystal display device.
  • the method for fabricating the color filter substrate of the present invention utilizes the characteristics of the quantum dot material to form a color film layer including red, green, cyan, and blue filter layers on the base substrate, and can be used to realize the four primary colors of the display device. It is shown that, while improving the quantum dot utilization rate, the display color gamut range is effectively improved; the liquid crystal display device of the present invention comprises a color film layer and a backlight module emitting blue light, and the color film layer comprises red, green, cyan and blue.
  • the red filter layer comprises a red filter film, and a red quantum dot film on the red filter film
  • the green filter layer comprises a green filter film
  • the green filter film is disposed on the green filter film a green quantum dot film
  • the cyan filter layer comprises a green quantum dot film
  • FIG. 1 is a flow chart showing a method of fabricating a color filter substrate of the present invention
  • FIG. 2 is a schematic view showing the first step of the method for fabricating the color filter substrate of the present invention
  • FIG. 3 is a schematic view showing a step 2 of a method for fabricating a color filter substrate of the present invention
  • 4-5 is a schematic view showing the step 3 of the method for fabricating the color filter substrate of the present invention.
  • FIG. 6 is a schematic view showing the principle of color development of a color filter substrate prepared by the method for fabricating a color filter substrate of the present invention
  • Figure 7 is a cross-sectional structural view showing a liquid crystal display device of the present invention.
  • FIG. 8 is a diagram showing a method for fabricating a color filter substrate of the present invention and an emission spectrum of a red quantum dot film excited by a blue light in a liquid crystal display device;
  • FIG. 9 is a graph showing a method for fabricating a color filter substrate of the present invention and a transmittance curve of a red filter film for visible light in a liquid crystal display device;
  • FIG. 10 is a graph showing a method of fabricating a color filter substrate of the present invention and a transmittance of visible light of a green filter film in a liquid crystal display device;
  • FIG. 11 is a view showing a four-primary color display and a conventional display device performed by the liquid crystal display device of the present invention; The gamut contrast map of the primary color display.
  • the present invention provides a method for fabricating a color film substrate, which includes the following steps:
  • Step 1 as shown in FIG. 2, a base substrate 10 is provided, and a black matrix 40 is formed on the base substrate 10, and the black matrix 40 encloses a plurality of red sub-pixel regions 41 and numbers on the base substrate 10. a green sub-pixel region 42, a plurality of cyan sub-pixel regions 43, and a plurality of blue sub-pixel regions 44;
  • the black matrix 40 is formed on the base substrate 10 to have a thickness of 1 to 3 ⁇ m.
  • the black matrix 40 is used for blocking light, preventing color mixing between different sub-pixels, and can be used as a retaining wall for subsequent operation.
  • an inkjet printing process is used to form a red, green filter film and red and green quantum dot films.
  • Step 2 as shown in FIG. 3, a red filter film 511 and a green filter film 521 are respectively formed in the red sub-pixel region 41 and the green sub-pixel region 42 on the base substrate 10;
  • the red filter film 511 and the green filter film 521 are formed by a photolithography process, an inkjet printing process, or other processes.
  • the red filter film 511 may be a red photoresist layer
  • the green filter film 512 may be a green photoresist layer.
  • Step 3 as shown in FIG. 4-5, a red quantum dot film 512, a green sub-pixel region 42 on the base substrate 10, and cyan are formed in the red sub-pixel region 41 on the base substrate 10.
  • a green quantum dot film 522 is formed in the sub-pixel region 43;
  • the red quantum dot film 512 and the green quantum dot film 522 are formed by a photolithography process, an inkjet printing process, or other processes.
  • the color film layer 50 on the substrate substrate 11 is obtained, and the color film layer 50 includes a plurality of red, green, cyan, and blue sub-pixel regions 41 and 42 respectively. a plurality of red, green, cyan, and blue filter layers 51, 52, 53, 54 of 43 and 44;
  • the red filter layer 51 includes a red filter film 511 and a red quantum dot film 512 located on the red filter film 511.
  • the green filter layer 52 includes a green filter film 521 and The green quantum dot film 522 on the green filter film 521 is formed; the cyan filter layer 53 includes a green quantum dot film 522.
  • the blue filter layer 54 may not include any material, and may also include a transparent material film;
  • the step 2 or 3 further includes coating a transparent layer in the blue sub-pixel region 44 on the base substrate 10. Material film.
  • the principle of color development of the color filter substrate obtained by the method for fabricating a color filter substrate of the present invention is: when the color filter substrate is used for display in a display device with a backlight of blue light, the red quantum The dot film 512 emits red light under blue light excitation, the green quantum dot film 522 emits green light under blue light excitation, and the backlight blue light passes through the red quantum dot film 512 of the red filter layer 51 to emit a mixture of blue light and red light. The light is filtered by the red filter film 511 to emit red light and red.
  • the backlight blue light passes through the green quantum dot film 522 of the green filter layer 52, and then emits a mixture of blue light and green light, and passes through the green filter film. After 521, the green light is emitted to be green, and the backlight blue light passes through the green quantum dot film 522 of the cyan filter layer 53 to emit a mixed light of blue light and green light to be cyan, and the backlight blue light passes through the blue filter layer 53.
  • the blue color is displayed, thereby realizing the display of the red, green, blue and blue primary colors of the display device, and the quantum dot utilization rate is improved, and the display color gamut range is effectively improved.
  • the color film substrate obtained by the method for fabricating the color filter substrate of the present invention is used for displaying four primary colors in a display device, and the following conditions are also satisfied: as shown in FIG. 8, the red quantum dot film 521 Under the light excitation, red light having a peak of 620-640 nm and a half-wave width of 30-40 nm is emitted; the green quantum dot film 522 emits green light having a peak of 520-540 nm and a half-wave width of 30-40 nm under photoexcitation. As shown in FIG. 8, the red quantum dot film 521 Under the light excitation, red light having a peak of 620-640 nm and a half-wave width of 30-40 nm is emitted; the green quantum dot film 522 emits green light having a peak of 520-540 nm and a half-wave width of 30-40 nm under photoexcitation. As shown in FIG.
  • the red filter film 511 has a transmittance of more than 95.8% for light having a wavelength in the range of 620 to 780 nm, and a transmittance of 0.2% for light having a wavelength of 430 to 570 nm.
  • the green filter film 522 has a transmittance of light of 90% or more for a wavelength in the range of 486 to 560 nm, and a transmittance of 50 for a wavelength of 640 to 730 nm. %the following.
  • the present invention further provides a liquid crystal display device comprising a liquid crystal display panel 1 and a backlight module 2 located below the liquid crystal display panel 1;
  • the liquid crystal display panel 1 includes an upper substrate 100 and a lower substrate 200 disposed opposite to each other, a liquid crystal layer 30 disposed between the upper substrate 100 and the lower substrate 200, and an upper polarizer 12 disposed above the upper substrate 100. And a lower polarizer 24 disposed under the lower substrate 200.
  • the upper substrate 100 includes a first substrate 11 , a black matrix 40 and a color film layer 50 disposed on a side of the first substrate 11 adjacent to the liquid crystal layer 30 , and is disposed on the black matrix 40 .
  • the black matrix 40 encloses a plurality of red sub-pixel regions 41, a plurality of green sub-pixel regions 42, a plurality of cyan sub-pixel regions 43, and a plurality of blue sub-pixel regions 44 on the first base substrate 11.
  • the color film layer 50 includes a plurality of red, green, and cyan filter layers 51, 52, 53, 54 corresponding to a plurality of red, green, cyan, and blue sub-pixel regions 41, 42, 43, 44, respectively;
  • the red filter layer 51 includes a red filter film 511 and a red quantum dot film 512 located on the red filter film 511.
  • the green filter layer 52 includes a green filter film 521 and The green quantum dot film 522 on the green filter film 521; the cyan filter layer 53 includes a green quantum dot film 522; the blue filter layer 54 may not contain any material, or may include a layer Transparent material film.
  • the light emitted by the backlight module 2 is blue light.
  • the red quantum dot film 512 emits red light under blue light excitation, and the green quantum dot film 522 emits green light under blue light excitation;
  • the backlight blue light passes through the red quantum dot film 512 of the red filter layer 51, and then emits mixed light of blue light and red light, and is filtered by the red filter film 511 to emit red light.
  • Red backlight blue light passes through the green quantum dot film 521 of the green filter layer 52, and then emits mixed light of blue light and green light, and passes through the green filter film 522 to emit green light to be green
  • the backlight blue light passes through the cyan filter.
  • the green quantum dot film 522 of the light layer 53 emits a mixture of blue light and green light to develop a cyan color
  • the backlight blue light passes through the blue filter layer 53 to be blue, thereby realizing display of red, green, and blue primary colors.
  • the lower substrate 200 includes a second substrate 21, a TFT layer 22 disposed on a side of the second substrate 21 adjacent to the liquid crystal layer 30, and a pixel electrode on the TFT layer 22.
  • the liquid crystal display panel 1 may also be a COA (Color Filter on Array) structure, that is, the color film layer 50 is disposed on the side of the lower substrate 200, and specifically, may be disposed on the TFT layer 22 and Between the pixel electrode layers 23.
  • COA Color Filter on Array
  • the black matrix 40 has a thickness of 1 to 3 ⁇ m.
  • the red quantum dot film 512 emits red with a peak of 620-640 nm and a half-wave width of 30-40 nm under photoexcitation.
  • the green quantum dot film 522 emits green light having a peak of 520-540 nm and a half-wavelength of 30-40 nm under photoexcitation; as shown in FIG. 9, the red filter film 511 has a wavelength of 620-780 nm.
  • the transmittance of light in the interval is 95.8% or more, and the transmittance of light having a wavelength in the range of 430 to 570 nm is 0.2% or less; as shown in FIG. 10, the wavelength of the green filter film 521 is 486 ⁇ .
  • the transmittance of light in the 560 nm range is 90% or more, and the transmittance of light in the wavelength range of 640 to 730 nm is 50% or less.
  • Table 1 below shows the coordinates and color gamut of each of the primary colors in the four primary color display and the three primary colors in the color gamut, and the color gamut comparison chart is shown in FIG.
  • Table 1 shows the primary color coordinates and color gamut values in the primary color display and the three primary colors.
  • the liquid crystal display device of the invention combines the blue backlight and the color film layer to form four primary colors of red, green, cyan and blue, and displays the three primary colors of red, green and blue with the conventional display device. Compared, while improving the utilization of quantum dots, the display color gamut range is effectively improved.
  • the method for fabricating the color filter substrate of the present invention utilizes the characteristics of the quantum dot material to form a color film layer including red, green, cyan, and blue filter layers on the substrate, which can be used for realizing
  • the four primary colors of the display device can effectively improve the display color gamut range while improving the quantum dot utilization rate.
  • the liquid crystal display device of the present invention comprises a color film layer and a backlight module emitting blue light
  • the color film layer includes red, a green, cyan, and blue filter layer
  • the red filter layer includes a red filter film, and a red quantum dot film on the red filter film
  • the green filter layer includes a green filter film, and is located in the green a green quantum dot film on the filter film
  • the cyan filter layer comprises a green quantum dot film; using the characteristics of the quantum dot material, the blue backlight and the color film layer are combined to realize four primary color display, and the quantum dot is improved At the same time of utilization, the display gamut range is effectively improved.

Abstract

一种彩膜基板的制作方法及液晶显示装置。彩膜基板的制作方法，利用量子点材料的特点，在衬底基板（10、11）上形成包括红、绿、青、蓝色滤光层（51、52、53、54）的彩膜层（50），进而能够用于实现显示装置的四原色显示，在提高量子点利用率的同时，有效提高显示色域范围；液晶显示装置包括彩膜层（50）及发出蓝光的背光模组（2），该彩膜层（50）包括红、绿、青、蓝色滤光层（51、52、53、54），该红色滤光层（51）包含红色滤光膜（511）、及位于红色滤光膜（511）上的红色量子点膜（512），该绿色滤光层（52）包含绿色滤光膜（521）、及位于绿色滤光膜（521）上的绿色量子点膜（522），该青色滤光层（53）包含绿色量子点膜（522）；利用量子点材料的特点，将蓝色背光与彩膜层（50）进行结合，可实现四原色显示。

Description

彩膜基板的制作方法及液晶显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种彩膜基板的制作方法及液晶显示装置。
背景技术
随着显示技术的不断发展，人们对显示装置的显示质量要求也越来越高。目前市面上的液晶电视能表现的色域在68％-72％NTSC(National Television Standards Committee)之间，因而不能提供高品质的色彩效果。为提高液晶电视的表现色域，高色域背光技术正成为行业内研究的重点。
量子点材料(Quantum Dots，简称QDs)是指粒径在1-100nm的半导体晶粒。由于QDs的粒径较小，小于或者接近相应体材料的激子波尔半径，产生量子限域效应，本体材料连续的能带结构会转变为分立的能级结构，在外部光源的激发下，电子会发生跃迁，发射荧光。
利用量子点材料具有发光光谱集中，色纯度高、且发光颜色可通过量子点材料的尺寸、结构或成分进行简易调节的这些优点将其应用在显示装置中可有效地提升显示装置的色域及色彩还原能力。目前，最常见的做法是，采用蓝光LED为背光源，蓝光背光经红色量子点膜、绿色量子点膜后显红色、绿色，经透明层后显蓝色，即使用三个原色(红、绿、蓝)混合来显示色彩。量子点材料虽然可以提高显示面板的显示效果，但仅停留在应用于三原色显示技术中，然而三原色显示器事实上并无法完整地呈现自然界所有的颜色。
为扩大显示面板的显示色域，人们提出了在三原色显示器中再加入一种不同于红(R，Red)、绿(G，Green)、蓝(B，Blue)的新原色，且此种被加入的新原色在色度图上落于红、绿、蓝原色所围的三角形色域空间之外，如青色(C，Cyan)，即四原色显示技术，其中，青光可以由绿光和蓝光的混合光所得到。然而，目前常规的四原色显示中，其中的四原色由相应的颜料或染料所构成的滤光膜所提供，光利用率不高，及色彩效果也并不理想。在显示领域内，对于量子点材料在四色显示技术中应用的研究还不成熟。
发明内容
本发明的目的在于提供一种彩膜基板的制作方法，利用量子点材料的特点，在衬底基板上形成包括红、绿、青、蓝色滤光层的彩膜层，进而能够用于实现显示装置的四原色显示，提高量子点利用率的同时，有效提高显示色域范围。
本发明的目的还在于提供一种液晶显示装置，包括背光模组及彩膜层，利用量子点材料的特点，将蓝色背光与彩膜层进行结合，形成四原色显示，在提高量子点利用率的同时，有效提高显示色域范围。
为实现上述目的，本发明提供一种彩膜基板的制作方法，包括以下步骤：
步骤1、提供衬底基板，在所述衬底基板上形成黑色矩阵，所述黑色矩阵在衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域；
步骤2、在所述衬底基板上的红色子像素区域、绿色子像素区域内分别形成红色滤光膜、及绿色滤光膜；
步骤3、在所述衬底基板上的红色子像素区域内形成红色量子点膜，在所述衬底基板上的绿色子像素区域、及青色子像素区域内形成绿色量子点膜；
经所述步骤2-3后，得到位于所述衬底基板上的彩膜层，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜。
所述步骤1中，在所述衬底基板上形成的黑色矩阵的厚度为1～3μm。
所述步骤2中，通过光刻制程、或喷墨打印制程形成红色滤光膜、及绿色滤光膜；所述步骤3中，通过光刻制程、或喷墨打印制程形成红色量子点膜、及绿色量子点膜。
所述步骤2或3中，还包括在所述衬底基板上的蓝色子像素区域内形成一层透明材料膜；所述蓝色滤光层包含位于所述蓝色子像素区域内的透明材料膜。
所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；所述红色滤光膜对波长在620～780nm区间内的 光的穿透率为95.8％以上，对波长在430～570nm区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
本发明还提供一种液晶显示装置，包括液晶显示面板、及位于液晶显示面板下方的背光模组；
所述液晶显示面板包括包括相对设置的上基板与下基板、设于所述上基板与下基板之间的液晶层、设于所述上基板上方的上偏光片、及设于所述下基板下方的下偏光片；
所述上基板包括第一衬底基板、设于所述第一衬底基板上靠近所述液晶层一侧的黑色矩阵与彩膜层、设于所述黑色矩阵与彩膜层上的公共电极层、设于所述公共电极层上的第一配向膜；
其中，所述黑色矩阵在第一衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜；
所述背光模组发出的光为蓝光；
所述红色量子点膜在蓝光激发下发出红光，所述绿色量子点膜在蓝光激发下发出绿光；
所述液晶显示装置进行彩色显示时，背光蓝光经所述红色滤光层的红色量子点膜后射出蓝光与红光的混合光，并经过红色滤光膜过滤后射出红光而显红色，背光蓝光经所述绿色滤光层的绿色量子点膜后射出蓝光与绿光的混合光，并经过绿色滤光膜后射出绿光而显绿色，背光蓝光经所述青色滤光层的绿色量子点膜后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层而显蓝色，从而实现红绿青蓝四原色显示。
所述下基板包括第二衬底基板、设于所述第二衬底基板上靠近所述液晶层一侧的TFT层、位于所述TFT层上的像素电极层、及设于所述像素电极层上的第二配向膜。
所述黑色矩阵的厚度为1～3μm。
所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、 半波宽为30～40nm的绿光；所述红色滤光膜对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570nm区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
本发明还提供一种液晶显示装置，包括液晶显示面板、及位于液晶显示面板下方的背光模组；
所述液晶显示面板包括相对设置的上基板与下基板、设于所述上基板与下基板之间的液晶层、设于所述上基板上方的上偏光片、及设于所述下基板下方的下偏光片；
所述上基板包括第一衬底基板、设于所述第一衬底基板上靠近所述液晶层一侧的黑色矩阵与彩膜层、设于所述黑色矩阵与彩膜层上的公共电极层、设于所述公共电极层上的第一配向膜；
其中，所述黑色矩阵在第一衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜；
所述背光模组发出的光为蓝光；
所述红色量子点膜在蓝光激发下发出红光，所述绿色量子点膜在蓝光激发下发出绿光；
所述液晶显示装置进行彩色显示时，背光蓝光经所述红色滤光层的红色量子点膜后射出蓝光与红光的混合光，并经过红色滤光膜过滤后射出红光而显红色，背光蓝光经所述绿色滤光层的绿色量子点膜后射出蓝光与绿光的混合光，并经过绿色滤光膜后射出绿光而显绿色，背光蓝光经所述青色滤光层的绿色量子点膜后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层而显蓝色，从而实现红绿青蓝四原色显示；
其中，所述下基板包括第二衬底基板、设于所述第二衬底基板上靠近所述液晶层一侧的TFT层、位于所述TFT层上的像素电极层、及设于所述像素电极层上的第二配向膜；
其中，所述黑色矩阵的厚度为1～3μm；
其中，所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽 为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；所述红色滤光膜对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
本发明的有益效果：本发明提供了一种彩膜基板的制作方法及液晶显示装置。本发明的彩膜基板的制作方法，利用量子点材料的特点，在衬底基板上形成包括红、绿、青、蓝色滤光层的彩膜层，进而能够用于实现显示装置的四原色显示，在提高量子点利用率的同时，有效提高显示色域范围；本发明的液晶显示装置，包括彩膜层及发出蓝光的背光模组，所述彩膜层包括红、绿、青、蓝色滤光层，所述红色滤光层包含红色滤光膜、及位于红色滤光膜上的红色量子点膜，所述绿色滤光层包含绿色滤光膜、及位于绿色滤光膜上的绿色量子点膜，所述青色滤光层包含绿色量子点膜；利用量子点材料的特点，将蓝色背光与彩膜层进行结合，可实现四原色显示，在提高量子点利用率的同时，有效提高了显示色域范围。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其他有益效果显而易见。
附图中，
图1为本发明的彩膜基板的制作方法的流程图；
图2为本发明的彩膜基板的制作方法的步骤1的示意图；
图3为本发明的彩膜基板的制作方法的步骤2的示意图；
图4-5为本发明的彩膜基板的制作方法的步骤3的示意图；
图6为本发明的彩膜基板的制作方法制得的彩膜基板的显色原理示意图；
图7为本发明的液晶显示装置的剖面结构示意图；
图8为本发明的彩膜基板的制作方法及液晶显示装置中的红色量子点膜受蓝光激发后的发射频谱图；
图9为本发明的彩膜基板的制作方法及液晶显示装置中的红色滤光膜对可见光的透光率曲线图；
图10为本发明的彩膜基板的制作方法及液晶显示装置中的绿色滤光膜对可见光的透光率曲线图；
图11为本发明的液晶显示装置进行四原色显示与现有显示装置进行三 原色显示的色域对比图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1-6，本发明提供一种彩膜基板的制作方法，包括以下步骤：
步骤1、如图2所示，提供衬底基板10，在所述衬底基板10上形成黑色矩阵40，所述黑色矩阵40在衬底基板10上围出数个红子像素区域41、数个绿色子像素区域42、数个青色子像素区域43、及数个蓝色子像素区域44；
具体的，在所述衬底基板10上形成黑色矩阵40的厚度为1～3μm，所述黑色矩阵40既用于挡光，防止不同子像素间的混色，又有可以作为挡墙，便于后续步骤中使用喷墨打印制程形成红、绿色滤光膜和红、绿色量子点膜。
步骤2、如图3所示，在所述衬底基板10上的红色子像素区域41、绿色子像素区域42内分别形成红色滤光膜511、及绿色滤光膜521；
具体的，通过光刻制程、喷墨打印制程或其他制程形成红色滤光膜511、及绿色滤光膜521。
具体的，所述红色滤光膜511可以为红色光阻层，所述绿色滤光膜512可以为绿色光阻层。
步骤3、如图4-5所示，在所述衬底基板10上的红色子像素区域41内形成红色量子点膜512，在所述衬底基板10上的绿色子像素区域42、及青色子像素区域43内形成绿色量子点膜522；
具体的，通过光刻制程、喷墨打印制程或其他制程形成所述红色量子点膜512、及绿色量子点膜522。
经所述步骤2-3后，得到位于所述衬底基板11上的彩膜层50，所述彩膜层50包括分别对应数个红、绿、青、蓝色子像素区域41、42、43、44的数个红、绿、青、蓝色滤光层51、52、53、54；
所述红色滤光层51包含一红色滤光膜511、及位于所述红色滤光膜511上的红色量子点膜512；所述绿色滤光层52包含一绿色滤光膜521、及位于所述绿色滤光膜521上的绿色量子点膜522；所述青色滤光层53包含一绿色量子点膜522。
具体的，所述蓝色滤光层54可以为不包含任何材料，也可以为包含一层透明材料膜；
当所述蓝色滤光层54为包含一层透明材料膜时，所述步骤2或3中，还包括在所述衬底基板10上的蓝色子像素区域44内涂布形成一层透明材料膜。
请参阅图6，本发明的彩膜基板的制作方法所得到的彩膜基板的显色原理为：当所述彩膜基板用于背光为蓝光的显示装置中而进行显示时，所述红色量子点膜512在蓝光激发下发出红光，所述绿色量子点膜522在蓝光激发下发出绿光，背光蓝光经所述红色滤光层51的红色量子点膜512后射出蓝光与红光的混合光，并经过红色滤光膜511过滤后射出红光而显红色，背光蓝光经所述绿色滤光层52的绿色量子点膜522后射出蓝光与绿光的混合光，并经过绿色滤光膜521后射出绿光而显绿色，背光蓝光经所述青色滤光层53的绿色量子点膜522后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层53而显蓝色，从而实现了显示装置的红绿青蓝四原色显示，提高了量子点利用率的同时，有效提高显示色域范围。
具体的，为有效实现本发明的彩膜基板的制作方法所得到的彩膜基板用于显示装置中进行四原色显示，还需满足以下条件：如图8所示，所述红色量子点膜521在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜522在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；如图9所示，所述红色滤光膜511对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570nm区间内的光的穿透率为0.2％以下；如图10所示，所述绿色滤光膜522对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
如图7所示，本发明还提供一种液晶显示装置，包括液晶显示面板1、及位于液晶显示面板1下方的背光模组2；
所述液晶显示面板1包括相对设置的上基板100与下基板200、设于所述上基板100与下基板200之间的液晶层30、设于所述上基板100上方的上偏光片12、及设于所述下基板200下方的下偏光片24。
所述上基板100包括第一衬底基板11、设于所述第一衬底基板11上靠近所述液晶层30一侧的黑色矩阵40与彩膜层50、设于所述黑色矩阵40与彩膜层50上的公共电极层60、设于所述公共电极层60上的第一配向膜70。
其中，所述黑色矩阵40在第一衬底基板11上围出数个红子像素区域41、数个绿色子像素区域42、数个青色子像素区域43、及数个蓝色子像素区域44，所述彩膜层50包括分别对应数个红、绿、青、蓝色子像素区域41、42、43、44的数个红、绿、青色滤光层51、52、53、54；
所述红色滤光层51包含一红色滤光膜511、及位于所述红色滤光膜511上的红色量子点膜512；所述绿色滤光层52包含一绿色滤光膜521、及位于所述绿色滤光膜521上的绿色量子点膜522；所述青色滤光层53包含一绿色量子点膜522；所述蓝色滤光层54可以为不包含任何材料，也可以为包含一层透明材料膜。
所述背光模组2发出的光为蓝光。
所述红色量子点膜512在蓝光激发下发出红光，所述绿色量子点膜522在蓝光激发下发出绿光；
所述液晶显示装置进行彩色显示时，背光蓝光经所述红色滤光层51的红色量子点膜512后射出蓝光与红光的混合光，并经过红色滤光膜511过滤后射出红光而显红色，背光蓝光经所述绿色滤光层52的绿色量子点膜521后射出蓝光与绿光的混合光，并经过绿色滤光膜522后射出绿光而显绿色，背光蓝光经所述青色滤光层53的绿色量子点膜522后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层53而显蓝色，从而实现红绿青蓝四原色显示。
具体的，所述下基板200包括第二衬底基板21、设于所述第二衬底基板21上靠近所述液晶层30一侧的TFT层22、位于所述TFT层22上的像素电极层23、及设于所述像素电极层23上的第二配向膜25。
具体的，所述液晶显示面板1还可以为COA(Color Filter on Array)结构，即，将所述彩膜层50设置于下基板200一侧，具体的，可以设置于所述TFT层22与像素电极层23之间。
具体的，所述黑色矩阵40的厚度为1～3μm。
具体的，为使本发明的液晶显示装置有效实现四原色显示，如图8所示，所述红色量子点膜512在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜522在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；如图9所示，所述红色滤光膜511对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570nm区间内的光的穿透率为0.2％以下；如图10所示，所述绿色滤光膜521对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
以下表一显示了四原色显示及三原色显示中各基色在色域图中的坐标及色域范围，其色域对比图如图11所示。
表一四原色显示及三原色显示中各基色坐标及色域值
Figure PCTCN2015099620-appb-000001
Figure PCTCN2015099620-appb-000002
本发明的液晶显示装置利用量子点材料的特点，将蓝色背光与彩膜层进行结合，形成红、绿、青、蓝四原色显示，与传统的显示装置采用红、绿、蓝三原色显示相比，在提高量子点利用率的同时，有效提高显示色域范围。
综上所述，本发明的彩膜基板的制作方法，利用量子点材料的特点，在衬底基板上形成包括红、绿、青、蓝色滤光层的彩膜层，进而能够用于实现显示装置的四原色显示，在提高量子点利用率的同时，有效提高显示色域范围；本发明的液晶显示装置，包括彩膜层及发出蓝光的背光模组，所述彩膜层包括红、绿、青、蓝色滤光层，所述红色滤光层包含红色滤光膜、及位于红色滤光膜上的红色量子点膜，所述绿色滤光层包含绿色滤光膜、及位于绿色滤光膜上的绿色量子点膜，所述青色滤光层包含绿色量子点膜；利用量子点材料的特点，将蓝色背光与彩膜层进行结合，可实现四原色显示，在提高量子点利用率的同时，有效提高了显示色域范围。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

  1. 一种彩膜基板的制作方法，包括以下步骤：
    步骤1、提供衬底基板，在所述衬底基板上形成黑色矩阵，所述黑色矩阵在衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域；
    步骤2、在所述衬底基板上的红色子像素区域、绿色子像素区域内分别形成红色滤光膜、及绿色滤光膜；
    步骤3、在所述衬底基板上的红色子像素区域内形成红色量子点膜，在所述衬底基板上的绿色子像素区域、及青色子像素区域内形成绿色量子点膜；
    经所述步骤2-3后，得到位于所述衬底基板上的彩膜层，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
    所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜。
  2. 如权利要求1所述的彩膜基板的制作方法，其中，所述步骤1中，在所述衬底基板上形成的黑色矩阵的厚度为1～3μm。
  3. 如权利要求1所述的彩膜基板的制作方法，其中，所述步骤2中，通过光刻制程、或喷墨打印制程形成红色滤光膜、及绿色滤光膜；所述步骤3中，通过光刻制程、或喷墨打印制程形成红色量子点膜、及绿色量子点膜。
  4. 如权利要求1所述的彩膜基板的制作方法，其中，所述步骤2或3中，还包括在所述衬底基板上的蓝色子像素区域内形成一层透明材料膜；所述蓝色滤光层包含位于所述蓝色子像素区域内的透明材料膜。
  5. 如权利要求1所述的彩膜基板的制作方法，其中，所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；所述红色滤光膜对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570nm区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm 区间内的光的穿透率为50％以下。
  6. 一种液晶显示装置，包括液晶显示面板、及位于液晶显示面板下方的背光模组；
    所述液晶显示面板包括相对设置的上基板与下基板、设于所述上基板与下基板之间的液晶层、设于所述上基板上方的上偏光片、及设于所述下基板下方的下偏光片；
    所述上基板包括第一衬底基板、设于所述第一衬底基板上靠近所述液晶层一侧的黑色矩阵与彩膜层、设于所述黑色矩阵与彩膜层上的公共电极层、设于所述公共电极层上的第一配向膜；
    其中，所述黑色矩阵在第一衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
    所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜；
    所述背光模组发出的光为蓝光；
    所述红色量子点膜在蓝光激发下发出红光，所述绿色量子点膜在蓝光激发下发出绿光；
    所述液晶显示装置进行彩色显示时，背光蓝光经所述红色滤光层的红色量子点膜后射出蓝光与红光的混合光，并经过红色滤光膜过滤后射出红光而显红色，背光蓝光经所述绿色滤光层的绿色量子点膜后射出蓝光与绿光的混合光，并经过绿色滤光膜后射出绿光而显绿色，背光蓝光经所述青色滤光层的绿色量子点膜后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层而显蓝色，从而实现红绿青蓝四原色显示。
  7. 如权利要求6所述的液晶显示装置，其中，所述下基板包括第二衬底基板、设于所述第二衬底基板上靠近所述液晶层一侧的TFT层、位于所述TFT层上的像素电极层、及设于所述像素电极层上的第二配向膜。
  8. 如权利要求6所述的液晶显示装置，其中，所述黑色矩阵的厚度为1～3μm。
  9. 如权利要求6所述的液晶显示装置，其中，所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；所述 红色滤光膜对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
  10. 一种液晶显示装置，包括液晶显示面板、及位于液晶显示面板下方的背光模组；
    所述液晶显示面板包括相对设置的上基板与下基板、设于所述上基板与下基板之间的液晶层、设于所述上基板上方的上偏光片、及设于所述下基板下方的下偏光片；
    所述上基板包括第一衬底基板、设于所述第一衬底基板上靠近所述液晶层一侧的黑色矩阵与彩膜层、设于所述黑色矩阵与彩膜层上的公共电极层、设于所述公共电极层上的第一配向膜；
    其中，所述黑色矩阵在第一衬底基板上围出数个红子像素区域、数个绿色子像素区域、数个青色子像素区域、及数个蓝色子像素区域，所述彩膜层包括分别对应数个红、绿、青、蓝色子像素区域的数个红、绿、青、蓝色滤光层；
    所述红色滤光层包含一红色滤光膜、及位于所述红色滤光膜上的红色量子点膜；所述绿色滤光层包含一绿色滤光膜、及位于所述绿色滤光膜上的绿色量子点膜；所述青色滤光层包含一绿色量子点膜；所述蓝色滤光层不包含任何材料或者包含一透明材料膜；
    所述背光模组发出的光为蓝光；
    所述红色量子点膜在蓝光激发下发出红光，所述绿色量子点膜在蓝光激发下发出绿光；
    所述液晶显示装置进行彩色显示时，背光蓝光经所述红色滤光层的红色量子点膜后射出蓝光与红光的混合光，并经过红色滤光膜过滤后射出红光而显红色，背光蓝光经所述绿色滤光层的绿色量子点膜后射出蓝光与绿光的混合光，并经过绿色滤光膜后射出绿光而显绿色，背光蓝光经所述青色滤光层的绿色量子点膜后射出蓝光与绿光的混合光而显青色，背光蓝光穿过所述蓝色滤光层而显蓝色，从而实现红绿青蓝四原色显示；
    其中，所述下基板包括第二衬底基板、设于所述第二衬底基板上靠近所述液晶层一侧的TFT层、位于所述TFT层上的像素电极层、及设于所述像素电极层上的第二配向膜；
    其中，所述黑色矩阵的厚度为1～3μm；
    其中，所述红色量子点膜在光激发下发出波峰为620～640nm、半波宽 为30～40nm的红光；所述绿色量子点膜在光激发下发出波峰为520～540nm、半波宽为30～40nm的绿光；所述红色滤光膜对波长在620～780nm区间内的光的穿透率为95.8％以上，对波长在430～570区间内的光的穿透率为0.2％以下；所述绿色滤光膜对波长在486～560nm区间内的光的穿透率为90％以上，对波长在640～730nm区间内的光的穿透率为50％以下。
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