WO2013159376A1 - 背光模组及液晶显示装置 - Google Patents

背光模组及液晶显示装置 Download PDF

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Publication number
WO2013159376A1
WO2013159376A1 PCT/CN2012/075062 CN2012075062W WO2013159376A1 WO 2013159376 A1 WO2013159376 A1 WO 2013159376A1 CN 2012075062 W CN2012075062 W CN 2012075062W WO 2013159376 A1 WO2013159376 A1 WO 2013159376A1
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WIPO (PCT)
Prior art keywords
dot
light
color
light source
particles
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Ceased
Application number
PCT/CN2012/075062
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English (en)
French (fr)
Inventor
黄建发
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US13/512,347 priority Critical patent/US9201269B2/en
Publication of WO2013159376A1 publication Critical patent/WO2013159376A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a backlight module and a liquid crystal display device.
  • the liquid crystal display device itself cannot emit light, it is necessary to provide a light source by the backlight module to realize image display of the liquid crystal panel.
  • the existing backlight module is divided into two types: a direct type and a side type.
  • the ink dot in the light guide plate absorbs light, or the different color levels of the LED light source (Bin), the color difference occurs in the backlight surface of the backlight module. And these color differences will become more apparent as the size of the liquid crystal panel increases.
  • the technical problem to be solved by the present invention is to provide a backlight module and a liquid crystal display device, which can ensure the consistency of the color of light emitted by the backlight module, thereby reducing chromatic aberration.
  • a technical solution adopted by the present invention is to provide a backlight module, which includes: a light source; a light guide plate, including a light incident surface, a light exit surface, and a bottom surface, wherein the light incident surface and the light source The light-emitting surface is opposite to the light-incident surface, and the bottom surface is opposite to the light-emitting surface; the reflective sheet is disposed below the bottom surface of the light guide plate; and the optical film is disposed above the light-emitting surface of the light guide plate; wherein, on the reflective sheet A color gradient pigment coating is provided, the pigment coating is a yellow gradient to blue coating, wherein the mass percentage of the blue pigment in the pigment coating gradually increases away from the light source; the bottom surface of the light guide plate A dot consisting of a mixture of ink and color particles is included, wherein the mass percent concentration of the color particles in the dots varies with the distance of the dots from the light source.
  • the mass percentage concentration of the blue particles gradually increases along a direction away from the light source; when the color particles are yellow particles, the mass percentage concentration of the yellow particles gradually decreases along a direction away from the light source.
  • a backlight module which includes: a light source; a light guide plate, including a light incident surface, a light exit surface, and a bottom surface, wherein the light incident surface and the light incident surface
  • the light source is oppositely disposed, the light emitting surface is in contact with the light incident surface, the bottom surface is opposite to the light emitting surface; the reflective sheet is disposed below the bottom surface of the light guide plate; and the optical film is disposed above the light emitting surface of the light guide plate; wherein, the reflection is A color gradient pigment coating is applied to the film, and the pigment coating is a yellow gradient to blue coating.
  • the mass percentage of the blue pigment in the pigment coating gradually increases in a direction away from the light source.
  • the bottom surface of the light guide plate comprises an ink dot and a color compensation dot, wherein when the color compensation dot is a blue phosphor dot, the size of the blue phosphor dot gradually increases along a direction away from the light source; the color compensation dot is yellow fluorescent At the point of the powder dot, the size of the yellow phosphor dot gradually decreases in a direction away from the light source.
  • the size of the ink dot is unchanged.
  • the ink dot and the color compensation dot are a single layer structure, and the ink dot and the color compensation dot are alternately distributed on the bottom surface at equal intervals.
  • the ink dot and the color compensation dot are two-layer structure, wherein the first surface of the bottom surface is provided with a color compensation dot, and the second surface of the bottom surface is provided with an ink dot.
  • the ink dot and the color compensation dot are two-layer structure, wherein the first surface of the bottom surface is provided with an ink dot, and the second surface of the bottom surface is provided with a color compensation dot.
  • the bottom surface of the light guide plate comprises a dot composed of a mixture of ink and color particles, wherein the mass percentage concentration of the color particles in the dot changes according to the distance between the dot and the light source.
  • the mass percentage concentration of the blue particles gradually increases along a direction away from the light source; when the color particles are yellow particles, the mass percentage concentration of the yellow particles gradually decreases along a direction away from the light source.
  • a liquid crystal display device including a liquid crystal panel, and a backlight module disposed under the liquid crystal panel, the backlight module comprising: a light source; a light guide plate; The light-incident surface, the light-emitting surface and the bottom surface are included, wherein the light-incident surface is opposite to the light source, the light-emitting surface is in contact with the light-incident surface, and the bottom surface is opposite to the light-emitting surface; the reflective sheet is disposed below the bottom surface of the light guide plate; the optical film The sheet is disposed above the light-emitting surface of the light guide plate; wherein a color-graded pigment coating is disposed on the reflective sheet, and the pigment coating layer is a yellow gradient to blue coating layer.
  • the mass percentage of the blue pigment in the pigment coating gradually increases in a direction away from the light source.
  • the bottom surface of the light guide plate comprises an ink dot and a color compensation dot, wherein when the color compensation dot is a blue phosphor dot, the size of the blue phosphor dot gradually increases along a direction away from the light source; the color compensation dot is yellow fluorescent At the point of the powder dot, the size of the yellow phosphor dot gradually decreases in a direction away from the light source.
  • the size of the ink dot is unchanged.
  • the ink dot and the color compensation dot are a single layer structure, and the ink dot and the color compensation dot are alternately distributed on the bottom surface at equal intervals.
  • the ink dot and the color compensation dot are two-layer structure, wherein the first surface of the bottom surface is provided with a color compensation dot, and the second surface of the bottom surface is provided with an ink dot.
  • the ink dot and the color compensation dot are two-layer structure, wherein the first surface of the bottom surface is provided with an ink dot, and the second surface of the bottom surface is provided with a color compensation dot.
  • the bottom surface of the light guide plate comprises a dot composed of a mixture of ink and color particles, wherein the mass percentage concentration of the color particles in the dot changes according to the distance between the dot and the light source.
  • the mass percentage concentration of the blue particles gradually increases along a direction away from the light source; when the color particles are yellow particles, the mass percentage concentration of the yellow particles gradually decreases along a direction away from the light source.
  • the invention has the beneficial effects that the present invention is different from the prior art, and the invention provides a pigment coating from yellow to blue on the reflective sheet to correct the spectrum in the light guide plate, thereby ensuring that the backlight module is emitted.
  • the color of the light is consistent, thereby reducing the chromatic aberration.
  • FIG. 1 is a schematic structural view of a first embodiment of a backlight module of the present invention
  • Figure 2 is a graph showing the mass percentage of the blue pigment in the reflection sheet shown in Figure 1 as a function of the position of the blue pigment and the distance between the light sources;
  • FIG. 3 is a schematic structural view of a second embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic structural view of a first embodiment of an arrangement of ink dots and color compensation dots shown in FIG. 3;
  • Figure 5 is a schematic view showing the structure of the second embodiment of the arrangement of the ink dots and the color compensation dots shown in Figure 3;
  • FIG. 6 is a schematic structural view of a third embodiment of the arrangement of ink dots and color compensation dots shown in FIG. 3;
  • FIG. 7 is a schematic structural view of a third embodiment of a backlight module of the present invention.
  • Figure 8 is a distribution diagram of the dots composed of a mixture of ink and color particles shown in Figure 7;
  • Figure 9 is a graph showing the mass percent concentration of the yellow phosphor in the dots shown in Figure 7 as a function of the distance between the dots and the light source;
  • Figure 10 is a schematic view showing the structure of a liquid crystal display device of the present invention.
  • FIG. 1 is a schematic structural diagram of a first embodiment of a backlight module of the present invention.
  • the backlight module 100 includes a light source 101 , a light guide plate 102 , a reflective sheet 103 , and an optical film 104 .
  • the light guide plate 102 includes a light incident surface 112 , a light exit surface 122 , and a bottom surface 132 .
  • the light incident surface 112 of the light guide plate 102 is opposite to the light source 101.
  • the light exit surface 122 is in contact with the light incident surface 112, and the bottom surface 132 is disposed opposite to the light exit surface 122.
  • the bottom surface 132 includes ink dots 107.
  • the optical film 104 is disposed above the light-emitting surface 122 of the light guide plate 102, and is, for example, an optical diffusion sheet and an optical brightness-increasing sheet.
  • the reflective sheet 103 is disposed under the bottom surface 132 of the light guide plate 102.
  • a color-graded pigment coating 105 is disposed on the reflective sheet 103, and the pigment coating layer 105 is a yellow-graded to blue coating.
  • the function of the pigment coating is to selectively absorb the light incident on the reflection sheet 103, thereby ensuring the uniformity of the color of the light emitted from the backlight module 100.
  • the mass percentage of the blue pigment in the pigment coating 105 in the pigment coating 105 gradually increases in a direction away from the light source 101.
  • FIG. 2 is a graph in which the mass percentage of the blue pigment in the reflection sheet 103 shown in FIG. 1 changes with the distance between the position where the blue pigment is disposed and the light source 101.
  • the abscissa is the distance from the light source 101, that is, the distance between the position where the blue pigment is disposed and the light source 101, and the unit is mm;
  • the ordinate is the mass percentage of the blue pigment, that is, the blue pigment in the pigment The percentage by mass in the coating 105.
  • the ink dot 107 absorbs and scatters the incident light, and the ink dot 107 has a longer light absorption rate for the short-wavelength green light and blue light.
  • the red light is high. Therefore, at a position close to the light source 101, since the path of the light emitted from the light source 101 through the light guide plate 102 is short, the short light band absorbed by the light guide plate 102 is less, that is, the loss of green light and blue light is less. Therefore, the amount of blue pigment required at this time is small, and thus the mass percentage of the blue pigment near the light source 101 is small.
  • the mass percentage of the blue pigment is zero.
  • the mass percentage of the blue pigment in the pigment coating layer 105 is gradually increased along the direction away from the light source 101 to absorb the excess yellow light incident on the reflection sheet 103, so that the color of the light emitted from the backlight module 100 is made. Uniform.
  • FIG. 3 is a schematic structural view of a second embodiment of a backlight module of the present invention.
  • the backlight module of the second embodiment of the present invention is further improved on the basis of the first embodiment shown in FIG. 1.
  • the bottom surface 132 of the light guide plate 102 of the backlight module 100 further includes a color compensation dot 108 spaced apart from the ink dot 107 .
  • the color compensation dot 108 is made of phosphor, and light of a corresponding color can be generated according to the color of the phosphor.
  • the ink dots 107 and the color compensation dots 108 please refer to FIG. 4-6.
  • the color compensation dot is a blue phosphor dot 108a
  • the ink dot 107 and the blue phosphor dot 108a are arranged in a single layer structure, and the ink dot 107 and the blue phosphor dot 108a are alternately arranged at intervals.
  • the bottom surface 132 of the light plate 102 in other words, the ink dot rows composed of the ink dots 107 are alternately arranged at equal intervals with the blue phosphor dot lines composed of the blue phosphor dots 108a.
  • the specific arrangement is:
  • An ink dot 107 is disposed on a side of the light guide plate 102 closest to the light source 101 to form an ink dot row, and a blue phosphor dot 108a is disposed at a distance from the ink dot to form a blue phosphor dot row, and A side of the light guide plate 102 farthest from the light source 101 is provided with a blue phosphor dot 108a.
  • the size of the ink dot 107 is constant, and the size of the blue phosphor dot 108a gradually increases along the direction away from the light source 101.
  • the main working principle of the ink dot 107 and the blue phosphor dot 108a shown in FIG. 4 for color difference compensation is as follows:
  • the proportion of light in the short-wavelength band is continuously reduced, and the color of the light gradually changes from a bluish blue to a yellowish color. Therefore, the uniformity and uniformity of the color of the light of the light guide plate 102 is reflected in the constant ratio of the emitted blue light and yellow light.
  • the path of incident light in the light guide plate 102 is not long near the light source 101, the short-wavelength light is not absorbed by the ink dot 107, so the smaller blue phosphor dot 108a The color of the light can be compensated.
  • the short-wavelength light is absorbed more by the ink dot 107, that is, the light in the light guide plate 102 gradually becomes yellow, so more blue light is required to perform color compensation on the yellow light. Therefore, the blue phosphor dot 108a gradually increases.
  • the size of the ink dot 107 in this embodiment does not change, and may be set according to a specific situation, and is not mandatory here.
  • FIG. 5 is a schematic structural diagram of a second embodiment of the arrangement of ink dots and color compensation dots shown in FIG.
  • the ink dot and color compensation dot shown in FIG. 5 are different from that of FIG. 4 in that the color compensation dot shown in FIG. 5 is a yellow phosphor dot 108b, and the yellow phosphor dot 108b closest to the light source 101 is set to the largest size. And the size of the yellow phosphor dot 108b gradually decreases in a direction away from the light source 101.
  • light emitted from the light source 101 is converted into yellow light when it is incident on the yellow phosphor dot 108b.
  • the position near the light source 101 is not long because the incident light propagates through the light guide plate 102, and the light of the short wavelength band is not absorbed by the ink dot 107. Therefore, the light at this time is blue, so the setting is large.
  • Yellow phosphor dots 108b to compensate for the color of the light.
  • the short-wavelength light is absorbed more by the ink dot 107, that is, the light in the light guide plate 102 gradually becomes yellow, so the demand for the yellow light for color compensation is gradually reduced, so The size of the yellow phosphor dot 108b gradually decreases.
  • the size of the ink dot 107 in this embodiment does not change, and may be set according to a specific situation, and is not mandatory here.
  • FIG. 6 is a schematic structural diagram of a third embodiment of the arrangement of ink dots and color compensation dots shown in FIG. 3.
  • the ink dots 107 and the color compensation dots 108 are disposed on the light guide plate 102.
  • the bottom surface 132 has a two-layer structure, wherein the first surface of the bottom surface 132 is provided with a color compensation dot 108, and the second surface of the bottom surface 132 is provided with an ink dot 107. Therefore, the ink dot 107 and the color compensation dot 108 can be mutually non-interference, which is advantageous for fabricating the light guide plate 102 and improving the yield.
  • the positions of ink dot 107 and color compensation dot 108 are interchangeable, i.e., the first side of bottom surface 132 of light guide plate 102 is provided with ink dots 107, and the second side of bottom surface 132 is provided with color compensation dots 108.
  • the color compensation dot 108 may be the aforementioned blue phosphor dot 108a or the yellow phosphor dot 108b, and the size of the light-receiving dot 108 on the bottom surface 132 of the light guide plate 102 can be referred to the foregoing FIG. 4 and FIG. As described, it is not described here.
  • FIG. 7 is a schematic structural view of a third embodiment of a backlight module of the present invention. This embodiment is based on the backlight module 100 of the present invention as shown in the first embodiment shown in FIG.
  • the bottom surface 132 of the light guide plate 102 of the backlight module 100 further includes a dot 109 composed of a mixture of ink and color particles.
  • FIG. 8 is a distribution diagram of the dots 109 composed of a mixture of ink and color particles shown in FIG.
  • the dots 109 are of a constant size and are uniformly disposed on the bottom surface 132 of the light guide plate 102.
  • the size of the mesh point 109 is not clearly defined, and can be designed according to actual needs.
  • the diameter of the mesh point 109 can be 0.2-0.4 mm.
  • the minimum mesh point 109 can be 0.2 mm. It is 0.4 mm. Since the number of dots 109 in a screen is very large, the structure of the dots 109 is simplified in FIG.
  • the color particles in the dots 109 are blue particles.
  • the material of the blue particles is a blue pigment, and the mass percentage concentration of the blue pigment in the dots 109 gradually increases in a direction away from the light source 101. That is, the mass percentage concentration of the blue pigment in the dot 109 varies with the distance between the dot 109 and the light source 101, and the change trend is similar to the change trend shown in the graph in FIG. 2 above, and the color difference compensation
  • the principle is the same as that of the embodiment shown in FIG. 2, and details are not described herein again.
  • the color particles in the dot 109 may also be yellow particles, the material of the yellow particles is a yellow phosphor, and the mass percentage concentration of the yellow phosphor in the dot 109 varies with the distance between the dot 109 and the light source 101. Change with different, please refer to Figure 9 for specific changes.
  • FIG. 9 is a graph showing the mass percent concentration of the yellow phosphor in the dot 109 shown in FIG. 7 as a function of the distance between the dot 109 and the light source 101.
  • the abscissa is the distance between the mesh point 109 and the light source 101, and the unit is millimeter;
  • the ordinate is the mass percentage concentration of the yellow phosphor, wherein the mass percentage concentration of the yellow phosphor gradually decreases along the direction away from the light source 101. .
  • the light absorbing plate 102 absorbs less light from the light source 101, so the light loss is less, so the light at this time is bluish, so more yellow is needed.
  • the light is compensated for color, that is, the yellow phosphor has a large mass percentage concentration.
  • the value of the maximum mass percentage concentration of the yellow phosphor is 3%.
  • the light in the short wavelength band absorbed by the light guide plate 102 increases, and therefore, the light propagating in the light guide plate 102 gradually becomes yellow, so that the yellow phosphor capable of compensating for the light can be used.
  • the demand is reduced, that is, the mass percentage concentration of the yellow phosphor is gradually reduced.
  • the yellow phosphor is no longer required to color compensate the light in the light guide plate 102 when the distance between the halftone dot 109 and the light source 101 is 600 mm or more.
  • FIG. 10 is a schematic structural diagram of a liquid crystal display device according to the present invention.
  • the liquid crystal display device 200 of the present invention includes a liquid crystal panel 210 and a backlight module 220.
  • the liquid crystal panel 210 is disposed above the backlight module 220, and the backlight module 220 is configured to provide the liquid crystal panel 210 with a desired light source.
  • the backlight module 220 can adopt the backlight module 100 of any of the foregoing embodiments, so that the colors of the emitted light of the backlight module 220 are uniform, and the chromatic aberration is reduced.
  • the present invention designs a pigment coating from yellow to blue on the reflective sheet, and further provides ink dots and color compensation dots on the bottom surface of the light guide plate, or ink and color particles on the bottom surface of the light guide plate.
  • the present invention can ensure that the colors of the light emitted by the backlight module are uniform, thereby reducing chromatic aberration.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Description

背光模组及液晶显示装置
【技术领域】
本发明涉及显示技术领域，特别是涉及一种背光模组及液晶显示装置。
【背景技术】
液晶显示装置由于其液晶面板本身不能发光，需要由背光模组来提供光源，以实现液晶面板的图像显示。根据光源安装位置的不同，现有背光模组分为直下式和侧入式两种。
其中，在侧入式背光模组设计过程中，通常因为导光板中的油墨网点对光有吸收作用，或者LED光源的不同色度级别(Bin)，导致在背光模组的背光面内出现色差，并且这些色差随着液晶面板尺寸的增大，会显示得更加明显。
因此，有必要提供一种方案以解决上述技术难题。
【发明内容】
本发明主要解决的技术问题是提供一种背光模组及液晶显示装置，能够保证背光模组发出的光颜色的一致性，从而减小色差。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种背光模组，该背光模组包括：光源；导光板，包括入光面、出光面以及底面，其中，入光面与光源相对设置，出光面与入光面相接，底面与出光面相对设置；反射片，设置于导光板的底面的下方；光学膜片，设置于导光板的出光面的上方；其中，在反射片上设置一颜色渐变的颜料涂层，颜料涂层为一黄色渐变到蓝色的涂层，其中，蓝色颜料在颜料涂层中的质量百分比沿着远离光源的方向逐渐增大；导光板的底面包括由油墨和颜色粒子混合组成的网点，其中，网点中的颜色粒子的质量百分比浓度随着网点与光源的距离的不同而改变。
其中，颜色粒子为蓝色粒子时，蓝色粒子的质量百分比浓度沿着远离光源的方向逐渐增大；颜色粒子为黄色粒子时，黄色粒子的质量百分比浓度沿着远离光源的方向逐渐减小。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种背光模组，该背光模组包括：光源；导光板，包括入光面、出光面以及底面，其中，入光面与光源相对设置，出光面与入光面相接，底面与出光面相对设置；反射片，设置于导光板的底面的下方；光学膜片，设置于导光板的出光面的上方；其中，在反射片上设置一颜色渐变的颜料涂层，颜料涂层为一黄色渐变到蓝色的涂层。
其中，蓝色颜料在颜料涂层中的质量百分比沿着远离光源的方向逐渐增大。
其中，导光板的底面包括油墨网点和颜色补偿网点，其中，颜色补偿网点为蓝色荧光粉网点时，蓝色荧光粉网点的大小沿着远离光源的方向逐渐增大；颜色补偿网点为黄色荧光粉网点时，黄色荧光粉网点的大小沿着远离光源的方向逐渐减小。
其中，油墨网点的大小不变。
其中，油墨网点和颜色补偿网点为单层结构，且油墨网点和颜色补偿网点等间隔交替分布于底面。
其中，油墨网点和颜色补偿网点为双层结构，其中，底面的第一面设置颜色补偿网点，底面的第二面设置油墨网点。
其中，油墨网点和颜色补偿网点为双层结构，其中，底面的第一面设置油墨网点，底面的第二面设置颜色补偿网点。
其中，导光板的底面包括由油墨和颜色粒子混合组成的网点，其中，网点中的颜色粒子的质量百分比浓度随着网点与光源的距离的不同而改变。
其中，颜色粒子为蓝色粒子时，蓝色粒子的质量百分比浓度沿着远离光源的方向逐渐增大；颜色粒子为黄色粒子时，黄色粒子的质量百分比浓度沿着远离光源的方向逐渐减小。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示装置，其包括液晶面板；背光模组，设置在液晶面板的下方，该背光模组包括：光源；导光板，包括入光面、出光面以及底面，其中，入光面与光源相对设置，出光面与入光面相接，底面与出光面相对设置；反射片，设置于导光板的底面的下方；光学膜片，设置于导光板的出光面的上方；其中，在反射片上设置一颜色渐变的颜料涂层，颜料涂层为一黄色渐变到蓝色的涂层。
其中，蓝色颜料在颜料涂层中的质量百分比沿着远离光源的方向逐渐增大。
其中，导光板的底面包括油墨网点和颜色补偿网点，其中，颜色补偿网点为蓝色荧光粉网点时，蓝色荧光粉网点的大小沿着远离光源的方向逐渐增大；颜色补偿网点为黄色荧光粉网点时，黄色荧光粉网点的大小沿着远离光源的方向逐渐减小。
其中，油墨网点的大小不变。
其中，油墨网点和颜色补偿网点为单层结构，且油墨网点和颜色补偿网点等间隔交替分布于底面。
其中，油墨网点和颜色补偿网点为双层结构，其中，底面的第一面设置颜色补偿网点，底面的第二面设置油墨网点。
其中，油墨网点和颜色补偿网点为双层结构，其中，底面的第一面设置油墨网点，底面的第二面设置颜色补偿网点。
其中，导光板的底面包括由油墨和颜色粒子混合组成的网点，其中，网点中的颜色粒子的质量百分比浓度随着网点与光源的距离的不同而改变。
其中，颜色粒子为蓝色粒子时，蓝色粒子的质量百分比浓度沿着远离光源的方向逐渐增大；颜色粒子为黄色粒子时，黄色粒子的质量百分比浓度沿着远离光源的方向逐渐减小。
本发明的有益效果是：区别于现有技术的情况，本发明在反射片上设置一由黄色渐变到蓝色的颜料涂层，以对导光板中的光谱进行修正，能够保证背光模组出射的光颜色的一致，从而减小色差。
【附图说明】
图1是本发明背光模组的第一实施例的结构示意图；
图2是图1所示的反射片中的蓝色颜料的质量百分比随着蓝色颜料设置的位置与光源之间的距离而变化的曲线图；
图3是本发明背光模组的第二实施例的结构示意图；
图4是图3所示的油墨网点和颜色补偿网点的排列方式的第一实施例的结构示意图；
图5是图3所示的油墨网点和颜色补偿网点的排列方式的第二实施例的结构示意图；
图6是图3所示的油墨网点和颜色补偿网点的排列方式的第三实施例的结构示意图；
图7是本发明背光模组的第三实施例的结构示意图；
图8是图7所示的由油墨和颜色粒子混合组成的网点的分布图；
图9是图7所示的网点中的黄色荧光粉的质量百分比浓度随着网点与光源的距离而变化的曲线图；
图10是本发明的一种液晶显示装置的结构示意图。
【具体实施方式】
请参阅图1，图1是本发明背光模组的第一实施例的结构示意图，如图1所示，背光模组100包括光源101、导光板102、反射片103以及光学膜片104。其中，导光板102包括入光面112、出光面122以及底面132。导光板102的入光面112和光源101相对设置，出光面122与入光面112相接，底面132与出光面122相对设置。其中，底面132包含油墨网点107。
光学膜片104，设置在导光板102的出光面122的上方，其例如为光学扩散片和光学增亮片。
反射片103设置于导光板102的底面132的下方，其中，在反射片103上设置一颜色渐变的颜料涂层105，颜料涂层105为一黄色渐变到蓝色的涂层。颜料涂层的作用是对入射到反射片103中的光进行选择性的吸收，从而保证背光模组100出射光颜色的一致。
在优选实施中，颜料涂层105中的蓝色颜料在颜料涂层105中的质量百分比沿着远离光源101的方向逐渐增大。
请参阅图2，图2是图1所示的反射片103中的蓝色颜料的质量百分比随着蓝色颜料设置的位置与光源101之间的距离而变化的曲线图。如图2所示，横坐标为与光源101的距离，即蓝色颜料设置的位置与光源101之间的距离，其单位为毫米；纵坐标为蓝色颜料质量百分比，即蓝色颜料在颜料涂层105中的质量百分比。
本实施例中，由于导光板102的底面132上含有油墨网点107，油墨网点107对入射光有吸收和散射作用，并且油墨网点107对短波段的绿光和蓝光的光吸收率较长波段的红光高，因此，在靠近光源101的位置，因光源101发出的光经导光板102的路径较短，所以导光板102吸收的短波段的光较少，即绿光和蓝光的损失较少，所以，此时需要的蓝色颜料较少，因而在距离光源101较近处的蓝色颜料的质量百分比较小。
当蓝色颜料所在的位置与光源101的距离为0毫米时，蓝色颜料的质量百分比为0。
随着光在导光板102中传播，被导光板102吸收的短波段的光就越多，光呈现的颜色由偏蓝色渐变为偏黄色，因此，蓝色颜料的需求逐渐增加。相应地，蓝色颜料在颜料涂层105中的质量百分比沿着远离光源101的方向逐渐增大，以吸收入射到反射片103中的多余的黄光，使背光模组100的出射光的颜色均匀一致。
请参阅图3，图3是本发明背光模组的第二实施例的结构示意图。本发明第二实施例的背光模组是在图1所示的第一实施例的基础上进行进一步的改进。具体而言，如图3所示，在本实施例中，背光模组100的导光板102的底面132进一步包括与油墨网点107间隔设置的颜色补偿网点108。
其中，颜色补偿网点108由荧光粉制成，可根据荧光粉的颜色产生相对应颜色的光。油墨网点107和颜色补偿网点108具体的排列方式请参考图4-图6所示。
图4是图3所示的油墨网点和颜色补偿网点的排列方式的第一实施例的结构示意图。如图4所示，颜色补偿网点为蓝色荧光粉网点108a，设置油墨网点107和蓝色荧光粉网点108a为单层结构，并且油墨网点107和蓝色荧光粉网点108a等间隔交替分布于导光板102的底面132，换而言之，由油墨网点107组成的油墨网点行与由蓝色荧光粉网点108a组成的蓝色荧光粉网点行等间隔的交替排列。具体排列为：
在离光源101最近的导光板102的一侧设置油墨网点107，形成油墨网点行，在距该油墨网点行一定距离的位置设置蓝色荧光粉网点108a，形成蓝色荧光粉网点行，并且在离光源101最远的导光板102的一侧设置蓝色荧光粉网点108a。其中，油墨网点107的大小不变，蓝色荧光粉网点108a的大小沿着远离光源101的方向逐渐增大。
图4所示的油墨网点107和蓝色荧光粉网点108a进行色差补偿的主要工作原理为：
由于光源101发出的光在导光板102内部不断传播的过程中，短波段的光所占的比例不断减小，光的颜色会逐渐由偏蓝色过渡到偏黄色。因此，导光板102的光的颜色的均匀性和一致性体现在出射的蓝光和黄光的比例恒定。本实施例中，因为在靠近光源101的地方，入射的光在导光板102中传播的路径不长，短波段的光被油墨网点107吸收的不多，所以较小的蓝色荧光粉网点108a即可对光的颜色进行补偿。但随着光在导光板102内传播，短波段的光被油墨网点107吸收得较多，即导光板102内的光逐渐变成了黄色，因此需要更多的蓝光对黄光进行颜色补偿，所以蓝色荧光粉网点108a逐渐增大。
本实施例中的油墨网点107的大小不变，也可以根据具体的情况进行设置，在此不加以强制。
请参阅图5，图5是图3所示的油墨网点和颜色补偿网点的排列方式的第二实施例的结构示意图。图5所示的油墨网点和颜色补偿网点与图4的不同之处在于：图5所示的颜色补偿网点为黄色荧光粉网点108b，设置最靠近光源101的黄色荧光粉网点108b的大小为最大，且黄色荧光粉网点108b的大小沿着远离光源101的方向逐渐减小。
本实施例中，当从光源101中发出的光入射到黄色荧光粉网点108b时会转化为黄光。靠近光源101的位置，因入射的光在导光板102中传播的路径不长，短波段的光经油墨网点107吸收的不多，因此，此时的光为偏蓝色，所以设置较大的黄色荧光粉网点108b，以便对光的颜色进行补偿。随着光在导光板102内传播，短波段的光被油墨网点107吸收得较多，即导光板102内的光逐渐变成了黄色，因此对进行颜色补偿的黄光的需求逐渐减少，所以黄色荧光粉网点108b的大小逐渐减小。
本实施例中的油墨网点107的大小不变，也可以根据具体的情况进行设置，在此不加以强制。
请参阅图6，图6是图3所示的油墨网点和颜色补偿网点的排列方式的第三实施例的结构示意图，如图6所示，油墨网点107和颜色补偿网点108设置在导光板102的底面132，且为双层结构，其中，底面132的第一面设置颜色补偿网点108，底面132的第二面设置油墨网点107。由此可以实现油墨网点107和颜色补偿网点108两者互不干涉，有利于制作导光板102，提高成品率。
在优选实施例中，油墨网点107和颜色补偿网点108的位置可以互换，即：导光板102的底面132的第一面设置油墨网点107，底面132的第二面设置颜色补偿网点108。
应理解，本实施方式中，颜色补偿网点108可为前述的蓝色荧光粉网点108a或黄色荧光粉网点108b，其在导光板102的底面132上的设置大小可参考前文图4和图5所述，在此不在赘述。
请参阅图7，图7是本发明背光模组的第三实施例的结构示意图。本实施例是在如图1所示的第一实施例的本发明的背光模组100的基础上进行进一步的改进。
具体而言，如图7所示，本实施例中，背光模组100的导光板102的底面132进一步包括由油墨和颜色粒子混合组成的网点109。
请参考图8，图8是图7所示的由油墨和颜色粒子混合组成的网点109的分布图。如图8所示，网点109的大小不变，并且均匀设置在导光板102的底面132上。其中，网点109的大小没有明确的要求，可根据实际需要进行设计，在本实施例中，网点109的直径可以为0.2-0.4毫米，具体而言，最小的网点109可以做到0.2毫米，优选为0.4毫米。由于一个网版中的网点109数量非常多，图8中对网点109的结构进行了简化绘示。
本实施例中，网点109中的颜色粒子为蓝色粒子。其中，蓝色粒子的材料为蓝色的颜料，且蓝色颜料在网点109中所占的质量百分比浓度沿着远离光源101的方向逐渐增大。即：蓝色颜料在网点109中所占的质量百分比浓度随着网点109与光源101的距离的不同而改变，其变化趋势与前文图2中的曲线图所示的变化趋势类似，其色差补偿原理与图2所示的实施例相同，在此不再赘述。
本实施例中，网点109中的颜色粒子还可以是黄色粒子，黄色粒子的材料为黄色荧光粉，且黄色荧光粉在网点109中所占的质量百分比浓度随着网点109与光源101的距离的不同而改变，具体改变请参考图9。
请参考图9，图9是图7所示的网点109中的黄色荧光粉的质量百分比浓度随着网点109与光源101的距离而变化的曲线图。如图9所示，横坐标为网点109与光源101的距离，单位为毫米；纵坐标为黄色荧光粉的质量百分比浓度，其中，黄色荧光粉的质量百分比浓度沿着远离光源101的方向逐渐减少。
由前文的分析可知，在靠近光源101的位置，由于导光板102对光源101发出的光的吸收较少，光的损失较少，因此此时的光为偏蓝色，所以需要更多的黄光进行颜色的补偿，即黄色荧光粉的质量百分比浓度较大。
在本实施例中，黄色荧光粉的最大质量百分比浓度的数值为3%。随着光在导光板102中继续传播，导光板102吸收的短波段的光就越多，因此，在导光板102中传播的光逐渐变成黄色，所以能够对光进行补偿的黄色荧光粉的需求减少，即黄色荧光粉的质量百分比浓度逐渐减少。
在本实施例中，在网点109与光源101的距离为600毫米甚至更远时不再需要黄色荧光粉对导光板102中的光进行颜色补偿。
请参考图10，图10是本发明的一种液晶显示装置的结构示意图，如图10所示，本发明的液晶显示装置200包括液晶面板210以及背光模组220。其中，液晶面板210设置在背光模组220的上方，背光模组220用于为液晶面板210提供所需光源。
本实施例中，背光模组220可采用前文所述的任一实施例的背光模组100，以使背光模组220的出射光的颜色一致，减少色差。
综上所述，本发明在反射片上设计一由黄色渐变到蓝色的颜料涂层，更进一步在导光板的底面设置油墨网点和颜色补偿网点，或者在导光板的底面设置由油墨和颜色粒子组成的网点，通过上述方式，本发明能够保证背光模组出射光的颜色一致，从而减小色差。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种背光模组，其包括：
    光源；
    导光板，包括入光面、出光面以及底面，其中，所述入光面与所述光源相对设置，所述出光面与所述入光面相接，所述底面与所述出光面相对设置；
    反射片，设置于所述导光板的底面的下方；
    光学膜片，设置于所述导光板的出光面的上方；
    其中，在所述反射片上设置一颜色渐变的颜料涂层，所述颜料涂层为一黄色渐变到蓝色的涂层，其中，所述蓝色颜料在所述颜料涂层中的质量百分比沿着远离所述光源的方向逐渐增大；
    所述导光板的所述底面包括由油墨和颜色粒子混合组成的网点，其中，所述网点中的颜色粒子的质量百分比浓度随着所述网点与所述光源的距离的不同而改变 。
  2. 根据权利要求1所述的背光模组，其中，所述颜色粒子为蓝色粒子时，所述蓝色粒子的质量百分比浓度沿着远离所述光源的方向逐渐增大；所述颜色粒子为黄色粒子时，所述黄色粒子的质量百分比浓度沿着远离所述光源的方向逐渐减小。
  3. 一种背光模组，其包括：
    光源；
    导光板，包括入光面、出光面以及底面，其中，所述入光面与所述光源相对设置，所述出光面与所述入光面相接，所述底面与所述出光面相对设置；
    反射片，设置于所述导光板的底面的下方；
    光学膜片，设置于所述导光板的出光面的上方；
    其中，在所述反射片上设置一颜色渐变的颜料涂层，所述颜料涂层为一黄色渐变到蓝色的涂层。
  4. 根据权利要求3所述的背光模组，其中，蓝色颜料在所述颜料涂层中的质量百分比沿着远离所述光源的方向逐渐增大。
  5. 根据权利要求3所述的背光模组，其中，所述导光板的底面包括油墨网点和颜色补偿网点，其中，所述颜色补偿网点为蓝色荧光粉网点时，所述蓝色荧光粉网点的大小沿着远离所述光源的方向逐渐增大；所述颜色补偿网点为黄色荧光粉网点时，所述黄色荧光粉网点的大小沿着远离所述光源的方向逐渐减小。
  6. 根据权利要求5所述的背光模组，其中，所述油墨网点的大小不变。
  7. 根据权利要求5所述的背光模组，其中，所述油墨网点和所述颜色补偿网点为单层结构，且所述油墨网点和所述颜色补偿网点等间隔交替分布于所述底面。
  8. 根据权利要求5所述的背光模组，其中，所述油墨网点和所述颜色补偿网点为双层结构，其中，所述底面的第一面设置所述颜色补偿网点，所述底面的第二面设置所述油墨网点。
  9. 根据权利要求5所述的背光模组，其中，所述油墨网点和所述颜色补偿网点为双层结构，其中，所述底面的第一面设置所述油墨网点，所述底面的第二面设置所述颜色补偿网点。
  10. 根据权利要求3所述的背光模组，其中，所述导光板的底面包括由油墨和颜色粒子混合组成的网点，其中，所述网点中的颜色粒子的质量百分比浓度随着所述网点与所述光源的距离的不同而改变。
  11. 根据权利要求10所述的背光模组，其中，所述颜色粒子为蓝色粒子时，所述蓝色粒子的质量百分比浓度沿着远离所述光源的方向逐渐增大；所述颜色粒子为黄色粒子时，所述黄色粒子的质量百分比浓度沿着远离所述光源的方向逐渐减小。
  12. 一种液晶显示装置，其包括：
    液晶面板；
    背光模组，设置在所述液晶面板的下方，所述背光模组包括：
    光源；
    导光板，包括入光面、出光面以及底面，其中，所述入光面与所述光源相对设置，所述出光面与所述入光面相接，所述底面与所述出光面相对设置；
    反射片，设置于所述导光板的底面的下方；
    光学膜片，设置于所述导光板的出光面的上方；
    其中，在所述反射片上设置一颜色渐变的颜料涂层，所述颜料涂层为一黄色渐变到蓝色的涂层。
  13. 根据权利要求12所述的液晶显示装置，其中，蓝色颜料在所述颜料涂层中的质量百分比沿着远离所述光源的方向逐渐增大。
  14. 根据权利要求12所述的液晶显示装置，其中，所述导光板的底面包括油墨网点和颜色补偿网点，其中，所述颜色补偿网点为蓝色荧光粉网点时，所述蓝色荧光粉网点的大小沿着远离所述光源的方向逐渐增大；所述颜色补偿网点为黄色荧光粉网点时，所述黄色荧光粉网点的大小沿着远离所述光源的方向逐渐减小。
  15. 根据权利要求14所述的液晶显示装置，其中，所述油墨网点的大小不变。
  16. 根据权利要求14所述的液晶显示装置，其中，所述油墨网点和所述颜色补偿网点为单层结构，且所述油墨网点和所述颜色补偿网点等间隔交替分布于所述底面。
  17. 根据权利要求14所述的液晶显示装置，其中，所述油墨网点和所述颜色补偿网点为双层结构，其中，所述底面的第一面设置所述颜色补偿网点，所述底面的第二面设置所述油墨网点。
  18. 根据权利要求14所述的液晶显示装置，其中，所述油墨网点和所述颜色补偿网点为双层结构，其中，所述底面的第一面设置所述油墨网点，所述底面的第二面设置所述颜色补偿网点。
  19. 根据权利要求12所述的液晶显示装置，其中，所述导光板的底面包括由油墨和颜色粒子混合组成的网点，其中，所述网点中的颜色粒子的质量百分比浓度随着所述网点与所述光源的距离的不同而改变。
  20. 根据权利要求19所述的液晶显示装置，其中，所述颜色粒子为蓝色粒子时，所述蓝色粒子的质量百分比浓度沿着远离所述光源的方向逐渐增大；所述颜色粒子为黄色粒子时，所述黄色粒子的质量百分比浓度沿着远离所述光源的方向逐渐减小。
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