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WO2019062290A1 - 发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置 - Google Patents

发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置 Download PDF

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Publication number
WO2019062290A1
WO2019062290A1 PCT/CN2018/096167 CN2018096167W WO2019062290A1 WO 2019062290 A1 WO2019062290 A1 WO 2019062290A1 CN 2018096167 W CN2018096167 W CN 2018096167W WO 2019062290 A1 WO2019062290 A1 WO 2019062290A1
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WIPO (PCT)
Prior art keywords
light
color
color filter
colors
filter layer
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Application number
PCT/CN2018/096167
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English (en)
French (fr)
Inventor
蔺东龙
吴鹏
佟泽源
任富健
李文洋
龙斌
张志鹏
崔栋
韩锐
马青
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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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 US16/329,899 priority Critical patent/US11391989B2/en
Publication of WO2019062290A1 publication Critical patent/WO2019062290A1/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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue 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
    • G02F1/1335—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
    • 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
    • G02F1/133624—Illuminating devices characterised by their spectral emissions

Definitions

  • At least one embodiment of the present disclosure relates to a light emitting device and a method of adjusting the same thereof, a backlight module, and a liquid crystal display device.
  • the gamut is the range of colors that a device can express, that is, the range of colors that can be represented by various screen display devices, printers, or printing devices.
  • the National Television Standards Committee (NTSC) developed the NTSC color gamut standard based on the CIE chromaticity diagram, and delineated a 100% gamut area, which quantifies the size of the gamut by percentage.
  • NTSC National Television Standards Committee
  • the color gamut with a color gamut value of about 72% NTSC is a normal color gamut
  • a color gamut with a color gamut value of 90% or more is called a high color gamut.
  • At least one embodiment of the present disclosure provides a light emitting device, a method for adjusting the same thereof, a backlight module, and a liquid crystal display device.
  • At least one embodiment of the present disclosure provides a light emitting device including a light source and a color filter layer on a light exiting side of the light source.
  • the color filter layer includes color filters of at least two colors arranged in an array, and the color filter layer is configured to have different transmittances of light of at least two colors of white light emitted from the light source.
  • the light source emits a first white light
  • the first white light is converted into a second white light after filtering the color layer
  • the first white light includes a first color light and a second color light
  • the relative spectral intensity of the first color light in the first white light is less than a relative spectral intensity of the second color light in the first white light
  • the color filter layer being configured to have a transmittance for the first color light greater than a transmittance for the second color light such that the first color light is in the second white light
  • the relative spectral intensity is greater than the relative spectral intensity of the second color light in the second white light.
  • the light source comprises a yttrium aluminum garnet (YAG) phosphor.
  • YAG yttrium aluminum garnet
  • the wavelength of the first color light is greater than the wavelength of the second color light.
  • the first color light is red light and the second color light is green light or blue light.
  • the color filters of at least two colors are different in volume such that the color filter layer has different transmittances of light of at least two colors emitted from the light source.
  • the areas of the color filters of at least two colors are different to adjust the transmittance of the color filter layer for light of at least two colors.
  • the thickness of the color filters of at least two colors is different to adjust the transmittance of the color filter layer for light of at least two colors.
  • the color filter layer includes a red color filter, a green color filter, and a blue color filter.
  • the color filter layer also includes a transparent film layer or opening.
  • a color filter of each color includes a plurality of color filters each having the same shape and size.
  • multiple color filters of each color are evenly distributed.
  • At least one embodiment of the present disclosure provides a method for adjusting an illuminating spectrum of the illuminating device, comprising: acquiring an original spectrum of light emitted by a light source; acquiring a reference spectrum; comparing the original spectrum with a reference spectrum to obtain a comparison result; After adjusting the color filter layer so that the light emitted by the light source passes through the filter color layer, the original spectrum of the light source is converted into a target spectrum, and the target spectrum is substantially the same as the reference spectrum.
  • adjusting the color filter layer includes adjusting the volume of the color filter of at least two colors.
  • adjusting the volume of the color filter of at least two colors included in the color filter layer includes adjusting an area of the color filter of at least two colors.
  • adjusting the volume of the color filter of at least two colors included in the color filter layer includes adjusting a thickness of the color filter of at least two colors.
  • At least one embodiment of the present disclosure provides a backlight module, comprising: the light-emitting device according to any one of the above embodiments; and a light-adjusting structure located on a light-emitting side of the light-emitting device to achieve uniform light extraction.
  • At least one embodiment of the present disclosure provides a liquid crystal display device including an array substrate and a color filter substrate disposed opposite to each other, a liquid crystal layer between the array substrate and the color filter substrate, and a side of the array substrate away from the liquid crystal layer.
  • a backlight module as described in any of the above embodiments.
  • FIG. 1A is a schematic partial structural view of a light emitting device according to an embodiment of the present disclosure
  • FIG. 1B is a partial plan view of the light-emitting device shown in FIG. 1A taken along line AB;
  • 2A is an original spectrum diagram of a light emitting device according to an embodiment of the present disclosure
  • 2B is a reference spectrum diagram of a light emitting device according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic flow chart of a method for adjusting an illuminating spectrum of a illuminating device according to an embodiment of the present disclosure
  • FIG. 4 is a schematic partial structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic partial structural diagram of a liquid crystal display device according to an embodiment of the present disclosure.
  • a relatively effective method for improving the color gamut is to improve the backlight, that is, to improve the purity of the backlight (especially the three bands of red, green and blue) to improve the utilization of the backlight.
  • the purpose of the color gamut of the display device is to improve the backlight, that is, to improve the purity of the backlight (especially the three bands of red, green and blue) to improve the utilization of the backlight.
  • Embodiments of the present disclosure provide a light emitting device, a method for adjusting an emission spectrum thereof, a backlight module, and a liquid crystal display device.
  • the light emitting device includes a light source and a color filter layer on a light exiting side of the light source.
  • the color filter layer includes color filters of at least two colors arranged in an array, and the color filter layer is configured to have different transmittances of light of at least two colors of white light emitted from the light source.
  • the illuminating device can improve the color gamut of the display device including the illuminating device by adjusting the spectrum.
  • FIG. 1A is a schematic diagram showing a partial structure of a light-emitting device according to an embodiment of the present disclosure.
  • the light-emitting device includes a light source 1130 and a color filter layer 120 on the light-emitting side of the light source 1130 .
  • the color filter layer 120 includes color filters 121 of at least two colors arranged in a two-dimensional array, and the color filter layer 120 is configured to have different transmittances of light of at least two colors of white light emitted from the light source 1130.
  • the light-emitting device in the embodiment of the present disclosure adjusts the transmittance of light of at least two colors emitted by the light source by using the color filter layer, that is, the color filter layer can perform transmittance of light of a specific wavelength of light emitted from the light source.
  • the adjustment is such that the original spectrum of the illumination device is converted to the target spectrum, thereby increasing the color gamut of the display device to which the illumination device is applied.
  • the light source 1130 in this embodiment includes the light emitting chip 110 and the phosphor 130 located on the light emitting side of the light emitting chip 110.
  • the light emitting chip 110 may be a light emitting diode chip, and the embodiment includes but is not limited thereto.
  • the light emitted by the light emitting chip 110 is blue light
  • the phosphor 130 is a YAG (yttrium aluminum garnet) phosphor
  • the blue light emitted by the light emitting chip 110 excites the YAG phosphor to form the first white light 210.
  • This embodiment includes but is not limited thereto. .
  • the light emitted by the light emitting chip 110 is blue light
  • the fluorescent powder 130 is RG phosphor
  • the blue light emitted by the light emitting chip 110 excites the RG phosphor 130 to form the first white light 210.
  • the embodiment is not limited thereto, as long as the light source 1130 can emit the first white light 210.
  • the color filter layer 120 of the at least two colors included in the color filter layer 120 includes a red color filter 1211, a green color filter 1212, and a blue color filter 1213.
  • the color filter 121 of each color transmits light of the same color and absorbs most of the light of other colors.
  • the red color filter 1211 allows red light (700 nm) in the first white light 210 and a small amount of other colors of light, the transmittance of red light is much greater than that of other colors;
  • the green color filter 1212 allows The green light (546.1 nm) in a white light 210 and a small amount of light of other colors, the transmittance of green light is much larger than that of other colors;
  • the blue color filter 1213 allows the blue light in the first white light 210 to pass through (435.8 nm) And a small amount of light of other colors, the transmittance of blue light is much larger than that of other colors, and therefore, the light transmitted by the different color filters 121 is mixed to form the second white light 220.
  • the color filter of the at least two colors included in the color filter layer may also be a red color filter and a blue color filter.
  • an opening is required in the color filter layer to make the first white light Part of the white light is transmitted, that is, when the color filter layer includes color filters of two colors, the color filter layer further includes an opening.
  • the color filter layer 120 further includes a transparent film layer 1214 or an opening 1214, which transmits almost all of the light in the first white light 210, or the opening passes through the first white light 210.
  • a transparent film layer 1214 or an opening 1214 which transmits almost all of the light in the first white light 210, or the opening passes through the first white light 210.
  • the light transmittance of the color filter layer can be improved by using a transparent film layer or opening.
  • the volume of the color filter 121 of at least two colors is different so that the transmittance of the color filter layer 120 to the light of at least two colors of the light emitted from the light source 1130 is different as an example.
  • the embodiment is not limited thereto.
  • the color filters of all colors are the same in volume, but doping a certain color of the color filter of one or several colors (for example, a light conversion material, shading) The material or the like) changes the transmittance of the color filter of the doped material to the light of at least two colors, so that the transmittance of the color filter layer to the light of at least two colors of the light emitted from the light source is different.
  • the first white light 210 passes through the color filter layer 120 and is converted into the second white light 220.
  • the second white light 220 can be adjusted by adjusting the volume of the color filter 121 of each color in the color filter layer 120.
  • the relative spectral intensity of each color light is converted to convert the original spectrum of the illumination device to the target spectrum, thereby increasing the color gamut of the display device to which the illumination device is applied.
  • FIG. 1B is a partial plan view of the light-emitting device shown in FIG. 1A taken along the line AB.
  • the color filter layer 120 includes a color filter 121 of at least two colors arranged in a two-dimensional array, that is, The color filter layer 121 included in the color filter layer 120 is arranged in an array in the X direction and the Y direction.
  • the difference in volume of the color filter 121 of the at least two colors included in the color filter layer 120 includes: only adjusting the area of the color filter 121 of at least two colors, that is, only by adjusting the color filter 121 of at least two colors
  • the area of the XZ plane is such that the volume of the color filter 121 of at least two colors is different, so that the transmittance of the color filter layer 120 for at least two colors of light is different.
  • the color filter 121 of each color includes a plurality of color filters 121, that is, the number of color filters 121 of each color is plural, and the shape and size of each color filter 121 The same, that is, the color filter 121 of all colors included in the color filter layer 120 has the same shape and size along the XZ plane. Therefore, in an example of the embodiment, the area ratio of the color filters of different colors in the color filter layer can be converted into the number ratio of the color filters of different colors, thereby more conveniently adjusting the original spectrum of the light-emitting device.
  • each of the color filters 121 may be a rectangle as shown in FIG. 1B, or may be a circular shape, a polygonal shape, or other irregular shapes, which is not limited in this embodiment.
  • the plurality of color filters 121 of each color are evenly distributed.
  • the color filters 121 of different colors may be alternately arranged, i.e., the red color filter 1211, the green color filter 1212, and the blue color filter 1213 are evenly distributed to make the light emitted from the color filter layer more uniform.
  • the different color of the color filter 121 of the at least two colors included in the color filter layer 120 further includes: the thickness of the color filter 121 of at least two colors is different to adjust the color filter layer 120 to at least two The transmittance of the light of the color, that is, the adjustment of the transmittance of the light of at least two colors by adjusting the thickness of the color filter 121 of the at least two colors in the Y direction.
  • the transmittance of the red color filter to other color lights can be changed by adjusting the thickness of the red color filter.
  • the thickness of the red color filter can be increased to reduce its transmittance to blue and green light.
  • the adjustment of the volume and the thickness of the color filter 121 of at least two colors included in the color filter layer 120 can be performed to better achieve the adjustment of the volume of the color filter 121. .
  • the color filter layer may produce an uneven side, that is, a certain portion may generate a depressed portion, and after the filter layer is completed, the filter may be filtered.
  • a flat layer is formed on the uneven side of the color layer to enable the flat layer to fill the depressed portion of the color filter layer, thereby flattening the color filter layer.
  • FIG. 2A is an original spectrum diagram of a light-emitting device according to an embodiment of the present disclosure
  • FIG. 2B is a reference spectrum diagram of the light-emitting device according to an embodiment of the present disclosure, as shown in FIG. 2A and FIG.
  • the coordinates are the wavelength of the light, and the ordinate is the relative spectral intensity of the light at each wavelength.
  • the spectrum of the first white light emitted by the light source is the original spectrum
  • the first white light is converted into the second white light by the filtering color layer
  • the spectrum of the second white light is the target spectrum.
  • the spectral difference between the reference spectrum and the original spectrum is used as a design basis of the color filter layer, and the volume of the color filter of each color in the color filter layer is adjusted so that the target spectrum of the second white light is substantially the same as the reference spectrum. That is, the target spectrum of the second white light in the present embodiment is similar to the reference spectrum shown in FIG. 2B (for example, the similarity of the target spectrum to the reference spectrum is 90% or more) or completely the same.
  • the original spectrum in this embodiment is a spectrum of a light source including a YAG phosphor which has a lower color gamut when applied to a display device.
  • the first white light in the original spectrum includes first color light 211 and second color light 212, the relative spectral intensity of the first color light 211 being less than the relative spectral intensity of the second color light 212.
  • the wavelength of the first color light 211 is greater than the wavelength of the second color light 212.
  • the first color light 211 is red light and the second color light 212 is green light or blue light.
  • the center wavelength of the first color light 211 is 630 nm
  • the center wavelength of the second color light 212 is 450 nm, that is, the first color light 211 is red light
  • the second color light 212 is blue light.
  • the original spectrum further includes a third color light 213 having a center wavelength of 550 nm, that is, the third color light 213 is green light.
  • the relative spectral intensity of the second color light 212 is greatest, and the relative spectral intensities of the first color light 211 and the third color light 213 are less than the relative spectral intensity of the second color light 212.
  • the relative intensity of the first color light 211 is about 0.1
  • the relative spectral intensity of the second color light 212 is about 1
  • the relative intensity of the third color light 213 is about 0.3.
  • the reference spectrum in this embodiment is a spectrum of a light source including RG phosphor, and when applied to a display device, the color gamut of the display device is higher than that having the original as shown in FIG. 2A.
  • the color gamut of the display device of the spectrum Therefore, in this embodiment, a color filter layer may be disposed on a light-emitting side of the light source including the YAG phosphor, so that the first white light emitted from the light source including the YAG phosphor is converted into the second white light after being filtered by the color filter layer, and includes the RG phosphor powder.
  • the source of light is similar to the spectrum.
  • the relative spectral intensity of the first color light 211 included in the reference spectrum is the largest, and the relative spectral intensity of the second color light 212 and the third color light 213 is smaller than the relative spectral intensity of the first color light 211.
  • the relative intensity of the first color light 211 is about 1
  • the relative intensity of the second color light 212 is about 0.5
  • the relative intensity of the third color light 213 is about 0.2.
  • the difference between the two spectra is obtained as the relative spectral intensity of the first color light 211 having a wavelength band between 600 nm and 650 nm, and the peak wavelength of the entire spectrum is determined by
  • the relative spectral intensity of the first color light 211 is increased by 10 times
  • the relative spectral intensity of the second color light 212 is attenuated by 1/2
  • the relative spectral intensity of the third color light 213 is attenuated by 1/3.
  • the color filter layer in this embodiment is configured to increase the relative spectral intensity of the first color light 211 by 10 times and the relative spectral intensity of the second color light 212 by 1/2, so that the third color light 213
  • the relative spectral intensity is attenuated by 1/3 such that the relative spectral intensity of the first color light 211 is greater than the relative spectral intensity of the second color light 212 and the third color light 213, ie, the color filter layer is configured to be the first color light 211
  • the transmittance is greater than the transmittance of the second color light 212 and the third color light 213 such that the relative spectral intensity of the first color light 211 in the second white light is greater than the relative color of the first color light 211 in the first white light Spectral intensity.
  • the spectrum of the light source including the YAG phosphor is used as the original spectrum
  • the spectrum of the light source including the RG phosphor is used as the reference spectrum as an example, but is not limited thereto.
  • a color filter layer is disposed in the light emitting device, and the light emission spectrum of the light emitting device is improved by adjusting the volume of the color filter in the color filter layer, and the embodiment of the present disclosure can realize that the color patch is not adjusted. Fine-tune the function of displaying the white coordinates of the device.
  • FIG. 3 is a schematic flowchart of a method for adjusting an illuminating spectrum of a illuminating device according to an embodiment of the present invention. As shown in FIG. 3, the method for adjusting an illuminating spectrum of the illuminating device shown in FIG. 1A provided by the embodiment includes:
  • obtaining the original spectrum of light emitted by the light source in the present embodiment includes acquiring a spectrum of a light source including YAG phosphor as shown in FIG. 2A, the spectrum having a lower color gamut when applied to the display device.
  • the original spectrum here refers to the spectrum of the first white light emitted by the light source without filtering the color layer.
  • the original spectrum is the spectrum of the first white light emitted by the light source, and the original spectrum includes the first color light and the second color light, the relative spectral intensity of the first color light being less than the relative spectral intensity of the second color light.
  • the center wavelength of the first color light 211 is 630 nm
  • the center wavelength of the second color light 212 is 450 nm, that is, the first color light 211 is red light
  • the second color light 212 is blue light.
  • the original spectrum further includes a third color light 213 having a center wavelength of 550 nm, that is, the third color light 213 is green light.
  • the relative spectral intensity of the second color light 212 is greatest, and the relative spectral intensities of the first color light 211 and the third color light 213 are less than the relative spectral intensity of the second color light 212.
  • the relative intensity of the first color light 211 is about 0.1
  • the relative spectral intensity of the second color light 212 is about 1
  • the relative intensity of the third color light 213 is about 0.3.
  • acquiring the reference spectrum in the present embodiment includes acquiring a spectrum of a light source including the RG phosphor as shown in FIG. 2B.
  • the relative spectral intensity of the first color light 211 included in the reference spectrum is the largest, and the relative spectral intensity of the second color light 212 and the third color light 213 is smaller than the relative spectral intensity of the first color light 211.
  • the relative intensity of the first color light 211 is about 1
  • the relative intensity of the second color light 212 is about 0.5
  • the relative intensity of the third color light 213 is about 0.2.
  • the difference between the two spectra is obtained as the relative spectral intensity of the first color light 211 having a wavelength band between 600 nm and 650 nm, and the peak wavelength of the entire spectrum is determined by
  • the relative spectral intensity of the first color light 211 is increased by 10 times
  • the relative spectral intensity of the second color light 212 is attenuated by 1/2
  • the relative spectral intensity of the third color light 213 is attenuated by 1/3.
  • the first white light emitted by the light source may be converted into the second white light after the filtered color layer by adjusting the volume of the color filter of the at least two colors included in the color filter layer, and the original white light is converted into the first white light.
  • the target spectrum of two white light means that the target spectrum in this embodiment is similar to the reference spectrum shown in FIG. 2B (for example, the similarity of the target spectrum to the reference spectrum is 90% or more) or completely the same.
  • the volume of the color filter of at least two colors included in the color filter layer to increase the relative spectral intensity of the first color light 211 by a factor of 10 and attenuate the relative spectral intensity of the second color light 212 by 1/2
  • the relative spectral intensity of the third color light 213 is attenuated by 1/3, that is, the color filter layer is configured such that the transmittance to the first color light 211 is greater than the transmittance to the second color light 212 and the third color light 213.
  • the relative spectral intensity of the first color light 211 in the second white light is greater than the relative spectral intensity of the first color light 211 in the first white light.
  • the color filter includes at least two color filters including a red color filter, a green color filter, and a blue color filter.
  • a color filter of each color transmits light of the same color and absorbs light of other colors. Therefore, the red color filter transmits red light (700 nm) in the first white light, and the green color filter transmits the first color.
  • the green light (546.1 nm) in a white light and the blue color filter pass through the blue light (435.8 nm) in the first white light. Therefore, the light transmitted by the different color filters is mixed to form a second white light.
  • the color filter layer further includes a transparent film layer or opening, the transparent film layer transmitting almost all of the light of the first white light, or the opening transmitting the light of all the colors of the first white light. Therefore, the light transmittance of the color filter layer can be improved by using a transparent film layer or opening.
  • adjusting the volume of the color filter of at least two colors included in the color filter layer includes adjusting an area of the color filter of at least two colors.
  • a color filter of each color includes a plurality of color filters each having the same shape and size. Therefore, in an example of the embodiment, the area ratio of the color filters of different colors in the color filter layer can be converted into the number ratio of the color filters of different colors, thereby more conveniently adjusting the original spectrum of the light-emitting device.
  • adjusting the volume of the color filter of at least two colors included in the color filter layer includes adjusting a thickness of the color filter of at least two colors.
  • the adjustment of the volume of the color filter can be better achieved by adjusting the area and thickness of the color filter of at least two colors included in the color filter layer.
  • the relative spectral intensity of the 600 nm to 650 nm band is to be improved, it is necessary to maximize the ratio of the volume of the red color filter to the total volume of the color filter.
  • the spectrum of the light source including the YAG phosphor is used as the original spectrum
  • the spectrum of the light source including the RG phosphor is used as the reference spectrum as an example, but is not limited thereto.
  • FIG. 4 is a schematic diagram showing a partial structure of a backlight module according to an embodiment of the present invention.
  • the backlight module 100 of the present embodiment includes the illumination device provided by any of the above embodiments, and the illumination device.
  • the light-adjusting structure 140 on the light-emitting side is used to achieve uniform light extraction of the second white light 220.
  • the backlight module 100 is a direct-type backlight module as an example.
  • the light adjustment structure 140 includes a diffusion film 141 .
  • the diffusion film 141 may include a high transmittance polymer (such as polycarbonate, polymethyl methacrylate, polyethylene terephthalate, etc.) substrate and scattering particles doped therein. (such as titanium dioxide, etc.).
  • a high transmittance polymer such as polycarbonate, polymethyl methacrylate, polyethylene terephthalate, etc.
  • scattering particles doped therein. such as titanium dioxide, etc.
  • the diffusion film 141 may also be a laminated structure of a multilayer film.
  • the light passing through the diffusion film 141 is scattered by the scattering particles therein, so that the observer perceives that the light is a luminance distribution directly provided by the surface of the diffusion film 141.
  • the light adjustment structure 140 further includes a prism film 142 disposed on a side of the diffusion film 141 away from the color filter layer 120.
  • the prism film 142 may be formed by laminating a prism layer having a sharp-angled microprism structure and a substrate layer, and is configured to concentrate a large angle of light toward a small angle to increase the viewing brightness of the positive viewing angle.
  • the backlight module may also be a side-in type.
  • the light adjustment structure at this time includes a light guide plate configured to homogenize light incident into the light guide plate.
  • the backlight module provided by the embodiment of the present disclosure further includes a reflective layer 150 disposed on a side of the light source 1130 away from the color filter layer 120 to improve utilization of light energy.
  • a color filter substrate is also provided with a color filter on the liquid crystal display device.
  • the arrangement of the color filters on the color filter substrate and the arrangement of the pixels on the array substrate are identical, it is difficult to make adjustments (for example, on an area). Adjusting), when the color gamut of the display device is low, the phosphor in the light source of the backlight module can be replaced, but the process is complicated and costly. Therefore, the embodiment of the present disclosure selects to set the color filter in the backlight module.
  • the layer can not only reduce the cost required for the backlight module, simplify the process, but also quickly solve the problem of insufficient color gamut of the display device.
  • FIG. 5 is a partial schematic structural diagram of a liquid crystal display device according to an embodiment of the present disclosure.
  • the liquid crystal display device provided in this embodiment includes an array substrate 300 and a color filter substrate 400 disposed opposite each other.
  • the color film substrate 400 provided in this embodiment further includes a color film layer 410.
  • the color film layer 410 includes a red color film layer, a green color film layer, a blue color film layer, and a white color film layer. This embodiment includes but is not limited thereto.
  • the color filter layer included in the backlight module of the embodiment can filter and adjust the wavelength of the light emitted by the light source to better match the color film layer, thereby improving the color gamut of the liquid crystal display device.
  • the liquid crystal display device may be any product or component having a display function such as a television, a digital camera, a mobile phone, a watch, a tablet, a notebook computer, a navigator, or the like including the liquid crystal display device, and the embodiment is not limited thereto.

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Abstract

一种发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置。该发光装置包括光源(1130)以及位于光源(1130)出光侧的滤色层(120)。滤色层(120)包括阵列排布的至少两种颜色的滤色片(121)，并且，滤色层(120)被配置为对光源(1130)发出的白光中的至少两种颜色的光的透过率不同。该发光装置通过对光谱的调节，可以提高包括该发光装置的显示装置的色域。

Description

发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置
本申请要求于2017年9月28日递交的中国专利申请第201710899172.0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。
技术领域
本公开至少一个实施例涉及一种发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置。
背景技术
随着科技的发展，人们对色彩的追求日益提高，高色域的产品也逐渐占据市场的主导地位，还原自然色也成为现代显示技术的一个发展方向。色域是指某种设备所能表达的颜色数量所构成的范围区域，也就是各种屏幕显示设备、打印机或者印刷设备所能表现的颜色范围。美国国家电视标准委员会(National Television Standards Committee，简称NTSC)基于CIE色度图制定了NTSC色域标准，划出了一个100％的色域区域，通过百分比来量化表示色域的大小。一般色域值在72％NTSC左右的色域为普通色域，色域值达到90％NTSC以上的色域就可称为高色域。
发明内容
本公开的至少一实施例提供一种发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置。
本公开的至少一实施例提供一种发光装置，包括光源以及位于光源出光侧的滤色层。滤色层包括阵列排布的至少两种颜色的滤色片，并且，滤色层被配置为对光源发出的白光中的至少两种颜色的光的透过率不同。
例如，光源发出第一白光，第一白光经过滤色层后转化为第二白光，第一白光包括第一颜色光和第二颜色光，第一颜色光在第一白光中的相对光谱强度小于第二颜色光在第一白光中的相对光谱强度，滤色层被配置为对第一颜色光的透过率大于对第二颜色光的透过率以使第一颜色光在第二白光中的相对光谱强度大于第二颜色光在第二白光中的相对光谱强度。
例如，光源包括钇铝石榴石(YAG)荧光粉。
例如，第一颜色光的波长大于第二颜色光的波长。
例如，第一颜色光为红光，第二颜色光为绿光或者蓝光。
例如，至少两种颜色的滤色片的体积不同，以使滤色层对光源发出的至少两种颜色的光的透过率不同。
例如，至少两种颜色的滤色片的面积不同以调节滤色层对至少两种颜色的光的透过率。
例如，至少两种颜色的滤色片的厚度不同以调节滤色层对至少两种颜色的光的透过率。
例如，滤色层包括红色滤色片、绿色滤色片以及蓝色滤色片。
例如，滤色层还包括透明膜层或开口。
例如，每种颜色的滤色片包括多个滤色片，每个滤色片的形状以及尺寸相同。
例如，每种颜色的多个滤色片均匀分布。
本公开的至少一实施例提供一种对上述发光装置的发光光谱的调节方法，包括：获取光源发出的光的原始光谱；获取基准光谱；比较原始光谱与基准光谱，得到比较结果；根据比较结果调节滤色层以使光源发出的光经过滤色层后，光源的原始光谱转换为目标光谱，目标光谱与基准光谱大致相同。
例如，调节滤色层包括调节至少两种颜色的滤色片的体积。
例如，调节滤色层包括的至少两种颜色的滤色片的体积包括：调节至少两种颜色的滤色片的面积。
例如，调节滤色层包括的至少两种颜色的滤色片的体积包括：调节至少两种颜色的滤色片的厚度。
本公开的至少一实施例提供一种背光模组，包括：上述任一项实施例所述的发光装置；以及位于发光装置的出光侧的光线调整结构以实现均匀取光。
本公开的至少一实施例提供一种液晶显示装置，包括对置设置的阵列基板和彩膜基板，位于阵列基板与彩膜基板之间的液晶层，以及位于阵列基板远离液晶层的一侧的如上述任一种实施例所述的背光模组。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简 单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1A为本公开的一实施例提供的一种发光装置的局部结构示意图；
图1B为图1A所示的发光装置沿AB线所截的局部平面示意图；
图2A为本公开一实施例提供的发光装置的原始光谱图；
图2B为本公开一实施例提供的发光装置的基准光谱图；
图3为本公开一实施例提供的发光装置的发光光谱的调节方法的流程示意图；
图4为本公开一实施例提供的一种背光模组的局部结构示意图；
图5为本公开一实施例提供的一种液晶显示装置的局部结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“上”、“下”等仅用于表示相对位置关系。
在研究中，本申请的发明人发现：提高色域的比较有效的方法是对背光进行改善，即，可以通过提高背光的纯度(尤其是红绿蓝三个波段)以达到提高利用该背光的显示装置的色域的目的。
本公开的实施例提供一种发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置。该发光装置包括光源以及位于光源出光侧的滤色层。滤色层包括阵列排布的至少两种颜色的滤色片，并且，滤色层被配置为对光源发出的白光中的至少两种颜色的光的透过率不同。该发光装置通过对光谱的调节，可以提高包括该发光装置的显示装置的色域。
下面结合附图对本公开实施例提供的发光装置及其发光光谱的调节方法、背光模组以及液晶显示装置进行描述。
图1A为本公开的一实施例提供的一种发光装置的局部结构示意图，如图1A所示，发光装置包括：光源1130以及位于光源1130出光侧的滤色层120。滤色层120包括二维阵列排布的至少两种颜色的滤色片121，并且，滤色层120被配置为对光源1130发出的白光中的至少两种颜色的光的透过率不同。本公开实施例中的发光装置利用滤色层对光源发出的至少两种颜色的光的透过率进行调节，即，滤色层可以对光源发出的光中的特定波长光的透过率进行调节，从而将发光装置的原始光谱转换为目标光谱，进而提高应用该发光装置的显示装置的色域。
例如，本实施例中的光源1130包括发光芯片110以及位于发光芯片110的出光侧的荧光粉130。
例如，发光芯片110可以为发光二极管芯片，本实施例包括但不限于此。例如，发光芯片110发出的光为蓝光，荧光粉130为YAG(钇铝石榴石)荧光粉，发光芯片110发出的蓝光激发YAG荧光粉后形成第一白光210，本实施例包括但不限于此。
例如，发光芯片110发出的光为蓝光，荧光粉130为RG荧光粉，发光芯片110发出的蓝光激发RG荧光粉130后形成第一白光210。本实施例不限于此，只要光源1130能够发出第一白光210即可。
例如，如图1A所示，滤色层120包括的至少两种颜色的滤色片121包括红色滤色片1211、绿色滤色片1212以及蓝色滤色片1213。
例如，每种颜色的滤色片121会透过与其颜色相同的光并吸收大部分其他颜色的光。
例如，红色滤色片1211允许透过第一白光210中的红光(700nm)以及少量其他颜色的光，红光的透过率远大于其他颜色的光；绿色滤色片1212允许透过第一白光210中的绿光(546.1nm)以及少量其他颜色的光，绿光的透过率远大于其他颜色的光；蓝色滤色片1213允许透过第一白光210中的蓝光(435.8nm)以及少量其他颜色的光，蓝光的透过率远大于其他颜色的光，因此，由不同颜色滤色片121透过的光混合后形成第二白光220。
本实施例不限于此，滤色层包括的至少两种颜色的滤色片还可以为红色滤色片和蓝色滤色片，此时滤色层中需设置开口以使第一白光中的部分白光透 过，即，在滤色层包括两种颜色的滤色片时，滤色层中还包括开口。
例如，如图1A所示，滤色层120还包括透明膜层1214或开口1214，该透明膜层几乎透过第一白光210中的所有颜色的光，或者开口透过第一白光210中的所有颜色的光。因此，采用透明膜层或开口可以提高滤色层的光透过率。
例如，本实施例以至少两种颜色的滤色片121的体积不同以使滤色层120对光源1130发出的光中的至少两种颜色的光的透过率不同为例进行描述。但本实施例不限于此，例如，还可以是所有颜色的滤色片的体积均相同，但是通过对其中一种或几种颜色的滤色片掺杂某种材料(例如光转换材料、遮光材料等)以改变被掺杂材料的滤色片对至少两种颜色的光的透过率，从而使滤色层对光源发出的光中的至少两种颜色的光的透过率不同。
例如，如图1A所示，第一白光210通过滤色层120后转换为第二白光220，通过对滤色层120中各颜色的滤色片121的体积的调节，可以调节第二白光220中各颜色光的相对光谱强度，从而将发光装置的原始光谱转换为目标光谱，进而提高应用该发光装置的显示装置的色域。
例如，图1B为图1A所示的发光装置沿AB线所截的局部平面示意图，如图1B所示，滤色层120包括二维阵列排布的至少两种颜色的滤色片121，即，滤色层120包括的滤色片121沿X方向和Y方向阵列排布。滤色层120包括的至少两种颜色的滤色片121的体积不同包括：仅通过调节至少两种颜色的滤色片121的面积，即，仅通过调节至少两种颜色的滤色片121沿XZ面的面积，以使至少两种颜色的滤色片121的体积不同，从而使滤色层120对至少两种颜色的光的透过率不同。
例如，如图1B所示，每种颜色的滤色片121包括多个滤色片121，即每种颜色的滤色片121的数量为多个，且每个滤色片121的形状以及尺寸相同，即，滤色层120包括的所有颜色的滤色片121的沿XZ面的形状以及尺寸均相同。因此，本实施例的一示例中可以将滤色层中的不同颜色的滤色片的面积比转化为不同颜色的滤色片的数量比，从而更方便的调节发光装置的原始光谱。
例如，每个滤色片121的形状可为如图1B所示的矩形，也可为圆形、多边形或者其他非规则形状，本实施例对此不做限制。
例如，每种颜色的多个滤色片121均匀分布。
例如，不同颜色的滤色片121可以交替设置，即，红色滤色片1211、绿色 滤色片1212以及蓝色滤色片1213均匀分布以使从滤色层出射的光混合的更均匀。
例如，如图1A所示，滤色层120包括的至少两种颜色的滤色片121的体积不同还包括：至少两种颜色的滤色片121的厚度不同以调节滤色层120对至少两种颜色的光的透过率，即，通过对至少两种颜色的滤色片121沿Y方向的厚度的调节可以实现对至少两种颜色的光的透过率的调节。
例如，本实施例中，可以通过调节红色滤色片的厚度以改变红色滤色片对其他颜色光的透过率。例如，可以增加红色滤色片的厚度以减小其对蓝色和绿色的光的透过率。
例如，如图1A和图1B所示，可以通过对滤色层120包括的至少两种颜色的滤色片121的面积以及厚度均进行调节以更好的实现对滤色片121的体积的调节。
例如，当滤色层中的不同颜色的滤色片的厚度不同时，滤色层会产生不平坦的一侧，即某些位置会产生凹陷部，在滤色层制作完成后，可在滤色层不平坦的一侧制作平坦层以使平坦层能够填充滤色层的凹陷部，从而使滤色层平坦化。
例如，图2A为本公开一实施例提供的发光装置的原始光谱图，图2B为本公开一实施例提供的发光装置的基准光谱图，如图2A和图2B所示，光谱图中的横坐标为光的波长，纵坐标为各波长光的相对光谱强度。本实施例中光源发出的第一白光的光谱为原始光谱，第一白光经过滤色层后转换为第二白光，第二白光的光谱为目标光谱。本实施例以基准光谱与原始光谱的光谱差异作为滤色层的设计依据，对滤色层中的各颜色的滤色片的体积进行调节，以使第二白光的目标光谱与基准光谱大致相同，即，本实施例中的第二白光的目标光谱与图2B所示的基准光谱相似(例如目标光谱与基准光谱的相似度为90％以上)或完全相同。
例如，如图2A所示，本实施例中的原始光谱为包括YAG荧光粉的光源的光谱，该光谱在应用于显示装置时，显示装置的色域较低。
例如，如图2A所示，原始光谱中的第一白光包括第一颜色光211和第二颜色光212，第一颜色光211的相对光谱强度小于第二颜色光212的相对光谱强度。
例如，第一颜色光211的波长大于第二颜色光212的波长。
例如，第一颜色光211为红光，第二颜色光212为绿光或者蓝光。
例如，如图2A所示，第一颜色光211的中心波长为630nm，第二颜色光212的中心波长为450nm，即，第一颜色光211为红光，第二颜色光212为蓝光。
例如，如图2A所示，原始光谱中还包括第三颜色光213，其中心波长为550nm，即，第三颜色光213为绿光。
例如，如图2A所示，第二颜色光212的相对光谱强度最大，第一颜色光211以及第三颜色光213的相对光谱强度小于第二颜色光212的相对光谱强度。
例如，第一颜色光211的相对光谱强度约为0.1，第二颜色光212的相对光谱强度约为1，第三颜色光213的相对光谱强度约为0.3。
例如，如图2B所示，本实施例中的基准光谱为包括RG荧光粉的光源的光谱，该光谱在应用于显示装置时，该显示装置的色域高于具有如图2A所示的原始光谱的显示装置的色域。因此，本实施例可在包括YAG荧光粉的光源的出光侧设置滤色层，从而使包括YAG荧光粉的光源发出的第一白光经过滤色层后转化的第二白光具有与包括RG荧光粉的光源相似的光谱。
例如，如图2B所示，基准光谱中包括的第一颜色光211的相对光谱强度最大，第二颜色光212以及第三颜色光213的相对光谱强度小于第一颜色光211的相对光谱强度。
例如，第一颜色光211的相对光谱强度约为1，第二颜色光212的相对光谱强度约为0.5，第三颜色光213的相对光谱强度约为0.2。
例如，如图2A和图2B所示，比较原始光谱与基准光谱，得到两个光谱的差异点为波段在600nm-650nm的第一颜色光211的相对光谱强度的提升，整个光谱的峰值波长由450nm变为630nm，第一颜色光211的相对光谱强度提升10倍，第二颜色光212的相对光谱强度衰减1/2，第三颜色光213的相对光谱强度衰减1/3。
因此，本实施例中的滤色层被配置为使第一颜色光211的相对光谱强度提高10倍，并且使第二颜色光212的相对光谱强度衰减1/2，使第三颜色光213的相对光谱强度衰减1/3，以使第一颜色光211的相对光谱强度大于第二颜色光212以及第三颜色光213的相对光谱强度，即，滤色层被配置为对第一颜色光211的透过率大于对第二颜色光212以及第三颜色光213的透过率以使第一颜色光211在第二白光中的相对光谱强度大于第一颜色光211在第一白光中的 相对光谱强度。
由上述比较结果可知，若需实现对600nm～650nm波段的相对光谱强度的提升，则需要使红色滤色片的体积在滤色片总体积中的比例最大。对比三原色变化比率，在各滤色片厚度均相同的情况下，三种颜色滤色片的面积比率为R:G:B＝40:2:1，考虑到该比例在小面积发光二极管的发光面难以实现，故可通过对三种颜色滤色片的厚度进行调节来实现滤色比例的调节。
例如，蓝色滤色片和绿色滤色片的厚度不变，且使红色滤色层的厚度变为蓝色滤色片和绿色滤色片的厚度的4倍，则各颜色滤色片的面积比可变为R:G:B＝10:2:1，此时，滤色片在发光二极管表面排布相对易实现。在对滤色层进行了上述调节之后，第一白光通过滤色层后得到的第二白光的目标光谱与基准光谱大致相同。
本实施例仅以包括YAG荧光粉的光源的光谱作为原始光谱，包括RG荧光粉的光源的光谱作为基准光谱为示例进行说明，但不限于此。
本公开实施例在发光装置中设置滤色层，通过对滤色层中的不同颜色滤色片的体积进行调节以改善发光装置的发光光谱，并且，本公开实施例能够实现不调整色块而微调显示装置白坐标的功能。
图3为本公开一实施例提供的发光装置的发光光谱的调节方法的流程示意图，如图3所示，本实施例提供的如图1A所示的发光装置的发光光谱的调节方法包括：
S201：获取光源发出的光的原始光谱。
例如，本实施例中获取光源发出的光的原始光谱包括：获取如图2A所示的包括YAG荧光粉的光源的光谱，该光谱在应用于显示装置时，显示装置的色域较低。这里的原始光谱指光源发出的第一白光未经过滤色层时的光谱。
例如，原始光谱为光源发出的第一白光的光谱，且原始光谱包括第一颜色光和第二颜色光，第一颜色光的相对光谱强度小于第二颜色光的相对光谱强度。
例如，如图2A所示，第一颜色光211的中心波长为630nm，第二颜色光212的中心波长为450nm，即，第一颜色光211为红光，第二颜色光212为蓝光。
例如，如图2A所示，原始光谱中还包括第三颜色光213，其中心波长为550nm，即，第三颜色光213为绿光。
例如，如图2A所示，第二颜色光212的相对光谱强度最大，第一颜色光211以及第三颜色光213的相对光谱强度小于第二颜色光212的相对光谱强度。
例如，第一颜色光211的相对光谱强度约为0.1，第二颜色光212的相对光谱强度约为1，第三颜色光213的相对光谱强度约为0.3。
S202：获取基准光谱。
例如，本实施例中获取基准光谱包括：获取如图2B所示的包括RG荧光粉的光源的光谱。
例如，如图2B所示，基准光谱中包括的第一颜色光211的相对光谱强度最大，第二颜色光212以及第三颜色光213的相对光谱强度小于第一颜色光211的相对光谱强度。
例如，第一颜色光211的相对光谱强度约为1，第二颜色光212的相对光谱强度约为0.5，第三颜色光213的相对光谱强度约为0.2。
S203：比较原始光谱与基准光谱，得到比较结果。
例如，如图2A和图2B所示，比较原始光谱与基准光谱，得到两个光谱的差异点为波段在600nm-650nm的第一颜色光211的相对光谱强度的提升，整个光谱的峰值波长由450nm变为630nm，第一颜色光211的相对光谱强度提升10倍，第二颜色光212的相对光谱强度衰减1/2，第三颜色光213的相对光谱强度衰减1/3。
S204：根据比较结果调节滤色层以使光源发出的光经过滤色层后，光源的原始光谱转换为目标光谱，该目标光谱与基准光谱大致相同。
例如，可以通过调节滤色层包括的至少两种颜色的滤色片的体积以使光源的发出的第一白光在经过滤色层后转化为第二白光，第一白光的原始光谱转换为第二白光的目标光谱。这里的“目标光谱与基准光谱大致相同”指：本实施例中的目标光谱与图2B所示的基准光谱相似(例如目标光谱与基准光谱的相似度为90％以上)或完全相同。
例如，调节滤色层包括的至少两种颜色的滤色片的体积，以使第一颜色光211的相对光谱强度提高10倍，并且使第二颜色光212的相对光谱强度衰减1/2，第三颜色光213的相对光谱强度衰减1/3，即，滤色层被配置为对第一颜色光211的透过率大于对第二颜色光212以及第三颜色光213的透过率以使第一颜色光211在第二白光中的相对光谱强度大于第一颜色光211在第一白光中的相对光谱强度。
例如，滤色层包括的至少两种颜色的滤色片包括红色滤色片、绿色滤色片以及蓝色滤色片。
例如，每种颜色的滤色片会透过与其颜色相同的光并吸收其他颜色的光，因此，红色滤色片透过第一白光中的红光(700nm)、绿色滤色片透过第一白光中的绿光(546.1nm)、蓝色滤色片透过第一白光中的蓝光(435.8nm)，因此，由不同颜色滤色片透过的光混合后形成第二白光。
例如，滤色层还包括透明膜层或开口，透明膜层几乎透过第一白光中的所有颜色的光，或者开口透过第一白光中的所有颜色的光。因此，采用透明膜层或开口可以提高滤色层的光透过率。
例如，调节滤色层包括的至少两种颜色的滤色片的体积包括：调节至少两种颜色的滤色片的面积。
例如，每种颜色的滤色片包括多个滤色片，每个滤色片的形状以及尺寸相同。因此，本实施例的一示例中可以将滤色层中的不同颜色的滤色片的面积比转化为不同颜色的滤色片的数量比，从而更方便的调节发光装置的原始光谱。
例如，调节滤色层包括的至少两种颜色的滤色片的体积包括：调节至少两种颜色的滤色片的厚度。
例如，可以通过对滤色层包括的至少两种颜色的滤色片的面积以及厚度均进行调节以更好的实现对滤色片的体积的调节。
例如，由上述比较结果可知，若需实现对600nm～650nm波段的相对光谱强度的提升，则需要使红色滤色片的体积在滤色片总体积中的比例最大。对比三原色变化比率，在各滤色片厚度均相同的情况下，三种颜色滤色片的面积比率为R:G:B＝40:2:1，考虑到该比例在小面积发光二极管的发光面难以实现，故可通过对三种颜色滤色片的厚度进行调节来实现滤色比例的调节。例如，蓝色滤色片和绿色滤色片的厚度不变，且使红色滤色层的厚度调整为蓝色滤色片和绿色滤色片的厚度的4倍，则各颜色滤色片的面积比可变为R:G:B＝10:2:1，此时，滤色片在发光二极管表面排布相对易实现。在对滤色层进行了上述调节之后，第一白光通过滤色层后得到的第二白光的目标光谱与基准光谱大致相同。
本实施例仅以包括YAG荧光粉的光源的光谱作为原始光谱，包括RG荧光粉的光源的光谱作为基准光谱为示例进行说明，但不限于此。
图4为本公开一实施例提供的一种背光模组的局部结构示意图，如图4所示，本实施例提供的背光模组100包括上述任一实施例提供的发光装置，以及 位于发光装置的出光侧的光线调整结构140，光线调整结构140用于实现对第二白光220的均匀取光。
例如，如图4所示，本实施例以背光模组100为直下式背光模组为例进行描述，光线调整结构140包括扩散膜141。
例如，扩散膜141可以包括一个高透过率的聚合物(如聚碳酸酯、聚甲基丙稀酸甲酯、聚对苯二甲酸乙二醇酯等)基板和掺杂在其中的散射颗粒(如二氧化钛等)。
例如，扩散膜141也可以为多层膜的叠层结构。穿过扩散膜141的光线会被其中的散射颗粒散射，使观察者感知光是由扩散膜141表面直接提供的亮度分布。
例如，如图4所示，光线调整结构140还包括设置在扩散膜141远离滤色层120的一侧棱镜膜142。
例如，棱镜膜142可以由一个具有尖角微棱镜结构的棱镜层和一个基板层贴合而成，被配置为将大角度的光向小角度集中，增加正视角的观看亮度。
本实施例不限于此，例如，背光模组还可以为侧入式，此时的光线调整结构包括导光板，导光板被配置为对入射到导光板中的光进行均匀化。
例如，如图4所示，本公开实施例提供的背光模组还包括反射层150，设置在光源1130远离滤色层120的一侧以提高光能的利用率。
一般液晶显示装置中的彩膜基板上也会设置有滤色片，但由于彩膜基板上滤色片的排列和阵列基板上的像素排列是一致的，很难做出调整(例如，面积上的调整)，当显示装置的色域较低时，可以选择更换背光模组的光源中的荧光粉，但是其工艺复杂且成本高，因此，本公开实施例选择在背光模组中设置滤色层，既可以降低背光模组所需的成本、简化工艺，又能够快速解决显示装置的色域不足的问题。
图5为本公开一实施例提供的一种液晶显示装置的局部结构示意图，如图5所示，本实施例提供的液晶显示装置包括对置设置的阵列基板300和彩膜基板400，位于阵列基板300与彩膜基板400之间的液晶层500，以及位于阵列基板300远离液晶层500的一侧的如上述任一实施例描述的背光模组100。
例如，如图5所示，本实施例提供的彩膜基板400还包括彩膜层410。例如，彩膜层410包括红色彩膜层、绿色彩膜层、蓝色彩膜层以及白色彩膜层，本实施例包括但不限于此。
本实施例中的背光模组包括的滤色层在对光源发出的光的波长进行过滤以及调整后，可以更好的与彩膜层相匹配，从而提高液晶显示装置的色域。
例如，该液晶显示装置可以为包括该液晶显示装置的电视、数码相机、手机、手表、平板电脑、笔记本电脑、导航仪等任何具有显示功能的产品或者部件，本实施例不限于此。
有以下几点需要说明：
(1)除非另作定义，本公开实施例以及附图中，同一标号代表同一含义。
(2)本公开实施例附图中，只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(3)为了清晰起见，在用于描述本公开的实施例的附图中，层或区域被放大。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
以上所述，仅为本公开的具体实施方式，但本公开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公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (17)

  1. 一种发光装置，包括：
    光源以及位于所述光源出光侧的滤色层，所述滤色层包括阵列排布的至少两种颜色的滤色片，
    其中，所述滤色层被配置为对所述光源发出的白光中的至少两种颜色的光的透过率不同。
  2. 根据权利要求1所述的发光装置，其中，所述光源发出第一白光，所述第一白光经过所述滤色层后转化为第二白光，所述第一白光包括第一颜色光和第二颜色光，所述第一颜色光在所述第一白光中的相对光谱强度小于所述第二颜色光在所述第一白光中的相对光谱强度，所述滤色层被配置为对所述第一颜色光的透过率大于对所述第二颜色光的透过率，以使所述第一颜色光在所述第二白光中的相对光谱强度大于所述第二颜色光在所述第二白光中的相对光谱强度。
  3. 根据权利要求1或2所述的发光装置，其中，所述光源包括钇铝石榴石(YAG)荧光粉。
  4. 根据权利要求1-3任一项所述的发光装置，其中，所述至少两种颜色的滤色片的体积不同，以使所述滤色层对所述至少两种颜色的光的透过率不同。
  5. 根据权利要求4所述的发光装置，其中，所述至少两种颜色的滤色片的面积不同以调节所述滤色层对所述至少两种颜色的光的透过率。
  6. 根据权利要求4或5所述的发光装置，其中，所述至少两种颜色的滤色片的厚度不同以调节所述滤色层对所述至少两种颜色的光的透过率。
  7. 根据权利要求2所述的发光装置，其中，所述第一颜色光为红光，所述第二颜色光为绿光或者蓝光。
  8. 根据权利要求1-7任一项所述的发光装置，其中，所述滤色层包括红色滤色片、绿色滤色片以及蓝色滤色片。
  9. 根据权利要求8所述的发光装置，其中，所述滤色层还包括透明膜层或开口。
  10. 根据权利要求1-9任一项所述的发光装置，其中，每种颜色的所述滤色片包括多个滤色片，每个所述滤色片的形状以及尺寸相同。
  11. 根据权利要求10所述的发光装置，其中，每种颜色的多个所述滤色片均匀分布。
  12. 一种背光模组，包括：
    权利要求1-11任一项所述的发光装置；以及
    位于所述发光装置的出光侧的光线调整结构以实现均匀取光。
  13. 一种液晶显示装置，包括对置设置的阵列基板和彩膜基板，位于所述阵列基板与所述彩膜基板之间的液晶层，以及位于所述阵列基板远离所述液晶层的一侧的如权利要求12所述的背光模组。
  14. 一种如权利要求1所述的发光装置的发光光谱的调节方法，包括：
    获取所述光源发出的光的原始光谱；
    获取基准光谱；
    比较所述原始光谱与所述基准光谱，得到比较结果；
    根据所述比较结果调节所述滤色层以使所述光源发出的光经过所述滤色层后，所述光源的原始光谱转换为目标光谱，所述目标光谱与所述基准光谱大致相同。
  15. 根据权利要求14所述的调节方法，其中，调节所述滤色层包括调节所述至少两种颜色的滤色片的体积。
  16. 根据权利要求15所述的调节方法，其中，调节所述滤色层包括的所述至少两种颜色的滤色片的体积包括：
    调节所述至少两种颜色的滤色片的面积。
  17. 根据权利要求15或16所述的调节方法，其中，调节所述滤色层包括的所述至少两种颜色的滤色片的体积包括：
    调节所述至少两种颜色的滤色片的厚度。
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