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WO2017020381A1 - Module de rétroéclairage et procédé de préparation pour module de rétro-éclairage - Google Patents

Module de rétroéclairage et procédé de préparation pour module de rétro-éclairage Download PDF

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Publication number
WO2017020381A1
WO2017020381A1 PCT/CN2015/088426 CN2015088426W WO2017020381A1 WO 2017020381 A1 WO2017020381 A1 WO 2017020381A1 CN 2015088426 W CN2015088426 W CN 2015088426W WO 2017020381 A1 WO2017020381 A1 WO 2017020381A1
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WO
WIPO (PCT)
Prior art keywords
quantum dot
guide plate
light
light guide
module
Prior art date
Application number
PCT/CN2015/088426
Other languages
English (en)
Chinese (zh)
Inventor
郑颖博
Original Assignee
武汉华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Publication of WO2017020381A1 publication Critical patent/WO2017020381A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • 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
    • 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 invention relates to the field of flat display, in particular to a backlight module backlight module and a method for preparing the backlight module.
  • the liquid crystal display device includes a liquid crystal display panel and a backlight module, and the backlight module is disposed adjacent to the liquid crystal display panel for providing a surface light source for the liquid crystal display panel.
  • the backlight module usually includes a light source and a light guide plate. Light emitted from the light source enters the light incident surface of the light guide plate and enters the light guide plate. After being diffused by the light guide plate, the light is emitted from the light exit surface of the light guide plate.
  • the liquid crystal display panel provides a surface light source. Quantum dots can achieve better imaging color because they can emit monochromatic light with concentrated spectrum, which is very pure.
  • the quantum dot application has a quantum dot film in the backlight module.
  • the quantum dot film is cut and applied to the backlight module.
  • a certain range of the edge of the quantum dot film for example, about 1 mm
  • oxygen and water in the air resulting in failure of the edge of the quantum dot film after being cut.
  • the quality of the light emitted from the edge after the quantum dot film is cut is further affected, and the performance of the display screen of the liquid crystal display device is further affected.
  • the present invention provides a backlight module, the backlight module includes a light guide plate and a quantum dot module, the light guide plate includes a light incident surface and a light exit surface, and the quantum dot module is filled with quantum dots, and the quantum dot module Buried in the light guide plate, and the quantum dot module is disposed on a light incident surface of the light guide plate and the Between the light-emitting surfaces of the light guide plate.
  • the light guide plate further includes a bottom surface disposed opposite to the light emitting surface, wherein the light incident surface respectively intersects the light emitting surface and the light emitting surface;
  • the quantum dot module includes a first surface and a second surface, a third surface and a fourth surface, the first surface is disposed opposite to the second surface, the third surface is disposed opposite to the fourth surface, and the third surface is respectively associated with the first surface and The second surfaces intersect, the fourth surface intersecting the first surface and the second surface, respectively, the first surface being disposed adjacent to the light incident surface than the second surface, The third surface is disposed adjacent to the light exiting surface, and the fourth surface is disposed adjacent to the bottom surface.
  • the third surface protrudes from the light emitting surface of the light guide plate
  • the fourth surface protrudes from the bottom surface of the light guide plate.
  • the first surface is parallel to the light incident surface of the light guide plate.
  • the material of the substrate of the light guide plate and the material of the substrate of the quantum dot module are both PMMA.
  • the invention also provides a method for preparing a backlight module, and the method for preparing the backlight module comprises:
  • the accommodating groove is disposed between the light incident surface of the light guide plate and the light emitting surface of the light guide plate, wherein the light guide plate forms a notch, and the notch communicates with the receiving Slot and the outside world;
  • the step of “curing the quantum dot colloid to form a quantum dot module” includes:
  • the quantum dot colloid is cured from the end remote from the gap toward the gap to form the quantum dot module.
  • the step of "curing the quantum dot colloid to form a quantum dot module” is carried out in an environment of insulating water and oxygen.
  • the accommodating groove is formed on the light guide plate, and the accommodating groove is disposed between the light incident surface of the light guide plate and the light emitting surface of the light guide plate, and a gap is formed on the light guide plate.
  • the gap is connected between the accommodating groove and the outside, and the step of inserting the quantum dot by the notch into the accommodating groove.
  • the preparation method of the backlight module further includes:
  • the quantum dot powder is mixed into an acrylic resin to prepare a quantum dot suspension colloid
  • the quantum dot suspension colloid uniformly mixed is subjected to centrifugal defoaming treatment.
  • the step of “sealing the gap” includes:
  • a sealing gel is filled into the notch to seal the gap using a dispenser, the material of the sealing gel being the same as the material of the light guide plate.
  • the backlight module of the present invention embeds the quantum dot module in the light guide plate, and the quantum dot module is disposed between the light incident surface and the light exit surface of the light guide plate.
  • the quantum dot module is not exposed to the air, and thus is not reacted by oxygen and water vapor in the air, so that the quality of the light emitted through the backlight module is better, and further, the backlight is used.
  • the liquid crystal display device of the module has a better display screen.
  • FIG. 1 is a schematic structural view of a backlight module according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view along line I-I of FIG. 1.
  • FIG. 3 is a schematic structural diagram of a backlight module according to another preferred embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view along line III-III of FIG. 3.
  • FIG. 5 is a flow chart of a method for fabricating a backlight module according to a preferred embodiment of the present invention.
  • FIG. 1 is a schematic structural view of a backlight module according to a preferred embodiment of the present invention
  • FIG. 2 is a cross-sectional structural view along I-I of FIG.
  • the backlight module 10 includes a light guide plate 100 and a quantum dot module 200.
  • the light guide plate 100 includes a light incident surface 110 and a light exit surface 120.
  • the quantum dot module 200 is filled with quantum dots.
  • the quantum dot module 200 is buried in the light guide plate 100, and the quantum dot module 200 is included. It is disposed between the light incident surface 110 of the light guide plate 100 and the light emitting surface 120 of the light guide plate 100.
  • the side-lighting type backlight module that is, the light source in the backlight module is located on the side of the light guide plate 100, the side of the light guide plate 100 adjacent to the light source is the light-incident surface, and the side-in-light backlight module
  • the light incident surface of the light guide plate 100 intersects the light exit surface.
  • the light-incident surface 110 is located at one side of the light-guiding plate 100.
  • the light-guiding plate 100 further includes a bottom surface 130.
  • the light-incident surface 110 intersects the light-emitting surface 120 and the bottom surface 130, respectively. 120 is disposed opposite to the bottom surface 130.
  • the quantum dot module 200 is embedded in the light guide plate 100 , and the quantum dot module 200 is disposed between the light incident surface 110 of the light guide plate 100 and the light exit surface 120 of the light guide plate 100 .
  • the quantum dot module 200 described herein is embedded in the light guide plate 100, which means that the quantum dot film 200 is completely covered in the light guide plate 100.
  • the light guide plate 100 is applied to the side-lit backlight module as an example.
  • the light guide plate 100 can also be applied to a direct-type backlight module.
  • the direct-lit backlight module that is, the light source in the backlight module is disposed on the bottom surface of the light guide plate.
  • the bottom surface of the light guide plate 100 adjacent to the light source is also a light-incident surface
  • the direct-lit backlight module In the group, the light incident surface of the light guide plate is disposed opposite to the light emitting surface.
  • the quantum dot module 200 is also disposed between the light incident surface of the light guide plate 100 and the light exit surface of the light guide plate 100.
  • the light guide plate 100 is formed by an injection molding process, and the material of the light guide plate 100 is polymethyl methacrylate (PMMA).
  • PMMA polymethyl methacrylate
  • a corresponding design can be made in the mold for preparing the light guide plate 100 to prepare the light guide plate 100 having the accommodating cavity, and the quantum dot module is embedded in the accommodating cavity of the light guide plate 100 200.
  • the PMMA material has strong hygroscopicity and has good airtightness. Therefore, selecting the material of the light guide plate 100 as PMMA can prevent the influence of moisture on the quantum dot module 200 to prevent the Quantum dot module 200 fails in reaction with water and oxygen. In addition, since the quantum dots are easily quenched by heat at high temperatures, the quantum dot module 200 is thermally deactivated.
  • the thermal conductivity of the PMMA material is weak, and the material of the light guide plate 100 is selected as PMMA. Therefore, when the light source is disposed adjacent to the light incident surface 110 of the light guide plate 100, the light guide plate 100 can be well. The heat emitted by the light source is isolated to avoid quenching of quantum dots in the quantum dot module 200 when heated. At the same time, the PMMA material has a good UV transmittance. Therefore, the light guide plate 100 is not suitable for yellowing and yellowing when the quantum dot module 200 is subsequently formed.
  • the material of the substrate in the quantum dot module 200 is the same as the material of the light guide plate 100, that is, the material of the quantum dot module 200 in the embodiment is also PMMA, and the refractive index of the PMMA substrate.
  • the stability is 1.49.
  • the material of the quantum dot module 200 and the material of the light guide plate 100 are the same, there is no refractive index difference between the quantum dot module 200 and the light guide plate 100. Therefore, light is from the light guide plate 100.
  • the material enters the quantum dot module 200 or is emitted from the quantum dot module 200 into the light guide plate 100 the light transmission path is not affected by the interface between the quantum dot module 200 and the light guide plate 200. Therefore, the light is not lost when the material of the light guide plate 100 enters the quantum dot module 200 or is emitted from the quantum dot module 200 into the light guide plate 100.
  • the quantum dot module 200 includes quantum dot powder.
  • a process of the quantum dot module 200 is simply described as follows.
  • the quantum dot powder is mixed in a substrate (for example, an acrylic resin, preferably, PMMA) to form a quantum dot suspension colloid, and the quantum dot suspension colloid is cured.
  • the process is followed by formation of a quantum dot module 200.
  • the curing process can be cured by irradiation with UV light.
  • the quantum dot module 200 can illuminate the quantum dots of the quantum dot module 200 to emit high-color solid light rays, and the light emitted by the light source and the high-color solid color light excited by the quantum dot module 200 are excited. The light is mixed to produce a high-color white light. Quantum dots, however, can be used to convert light rays emitted by light emitting diodes to produce light in the visible or infrared regions.
  • a quantum dot is a nanocrystal having a diameter smaller than a bulk radius of a bulk exciton. Due to the quantum confinement effect, the energy difference between the electronic states of a quantum dot is a function of both the composition and the physical size of the quantum dot.
  • Quantum dots absorb all wavelengths shorter than the absorption peak wavelength and emit light at longer wavelengths. 2nmCdSe quantum dots are emitted in the blue region of the visible spectrum, while 10nmCdSe quantum dots are in the visible spectrum Launched in the red area.
  • the application of quantum dots to display technology can produce high-quality red/green monochromatic light with concentrated spectrum and very pure color by means of quantum dots, completely surpassing the fluorescent light-emitting characteristics of conventional LED backlights to achieve better imaging color. Therefore, quantum dot display technology is regarded as the best solution to effectively improve the display color gamut value in the future, and it is a new technical wind vane in the global display industry.
  • the quantum dot module 200 includes a first surface 210, a second surface 220, a third surface 230, and a fourth surface 240.
  • the first surface 210 is disposed opposite to the second surface 220
  • the third surface 230 is disposed opposite to the fourth surface 240
  • the third surface 230 is respectively associated with the first surface 210 and the
  • the second surface 220 intersects the first surface 210 and the second surface 220, respectively, the first surface 210 is adjacent to the light incident surface compared to the second surface 220
  • the third surface 230 is disposed adjacent to the light emitting surface 120
  • the fourth bottom surface 240 is disposed adjacent to the bottom surface 130 .
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100 , and/or the fourth surface 240 protrudes from the bottom surface 130 of the light guide plate 100 .
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100, and the fourth surface 240 is flush with the bottom surface 130 of the light guide plate, thereby guiding the guide
  • the light panel 100 and the quantum dot module 200 form an inverted "T".
  • the area of the quantum dot module 200 adjacent to the light exit surface 120 is increased. Therefore, from the backlight module 10 When the light emitted by the light source enters the light guide plate 100, it can better interact with the quantum dots in the quantum dot module 200 to improve the performance of the light emitted from the quantum dot module 200.
  • the third surface 230 is flush with the light emitting surface 120 of the light guide plate 100 , and the fourth surface 240 protrudes from the bottom surface 130 of the light guide plate 100 .
  • the light guide plate 110 and the quantum dot module 200 form a "T" word.
  • the area of the quantum dot module 200 adjacent to the light exit surface 120 is increased, and therefore, the light source from the backlight module 10 is emitted.
  • the light enters the light guide plate 100 it can better interact with the quantum dots in the quantum dot module 200 to improve the performance of the light emitted from the quantum dot module 200.
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100
  • the fourth surface 240 protrudes from the bottom surface 130 of the light guide plate 100 .
  • the light guide plate 110 and the quantum dot module 200 form a "ten" word.
  • the light guide plate 100 and the quantum dot module 200 is designed to be "ten"
  • the area of the quantum dot module 200 adjacent to the light emitting surface 120 is increased, and therefore, light emitted from the light source of the backlight module 10 enters the
  • the light guide plate 100 can better interact with the quantum dots in the quantum dot module 200 to improve the performance of light emitted from the quantum dot module 200.
  • the first surface 210 is parallel to the light incident surface 110 of the light guide plate 100.
  • the first surface 210 is parallel to the light incident surface 110 of the light guide plate 100, there is no between the light incident surface 110 of the light guide plate 100 and the first surface 210 of the quantum dot module 200.
  • An angle is formed to avoid entering the quantum dot module 200 due to the presence of an angle when the light entering from the light incident surface 110 of the light guide plate 100 re-enters the first surface 210 of the quantum dot module 200
  • the brightness of the portion of the rear light guide plate 100 is different.
  • the light guide plate 100 is integrally formed with the quantum dot module 200.
  • FIG. 3 is a schematic structural view of a backlight module according to another preferred embodiment of the present invention.
  • FIG. 4 is a cross-sectional structural view along III-III of FIG.
  • the backlight module 10 includes a light guide plate 100 and a quantum dot module 200.
  • the light guide plate 100 includes a light incident surface 110 and a light exit surface 120.
  • the quantum dot module 200 is filled with quantum dots.
  • the quantum dot module 200 is buried in the light guide plate 100, and the quantum dot module 200 is included. It is disposed between the light incident surface 110 of the light guide plate 100 and the light emitting surface 120 of the light guide plate 100.
  • the light guide plate 100 is applied to a side-lit backlight module as an example for description.
  • the side-lighting type backlight module that is, the light source in the backlight module is located on the side of the light guide plate 100, the side of the light guide plate 100 adjacent to the light source is the light-incident surface, and the side-in-light backlight module
  • the light incident surface of the light guide plate 100 intersects the light exit surface.
  • the light-incident surface 110 is located at one side of the light-guiding plate 100.
  • the light-guiding plate 100 further includes a bottom surface 130.
  • the light-incident surface 110 intersects the light-emitting surface 120 and the bottom surface 130, respectively. 120 is disposed opposite to the bottom surface 130.
  • the quantum dot module 200 is embedded in the light guide plate 100 , and the quantum dot module 200 is disposed between the light incident surface 110 of the light guide plate 100 and the light exit surface 120 of the light guide plate 100 .
  • the quantum dot module 200 described herein is embedded in the light guide plate 100, which means that the quantum dot film 200 is completely covered in the light guide plate 100.
  • the light guide plate 100 is applied to the side of the side light type in the above embodiment.
  • the optical module is described as an example.
  • the light guide plate 100 can also be applied to a direct type backlight module.
  • the direct-lit backlight module that is, the light source in the backlight module is disposed on the bottom surface of the light guide plate.
  • the bottom surface of the light guide plate 100 adjacent to the light source is also a light-incident surface, and the direct-lit backlight module In the group, the light incident surface of the light guide plate is disposed opposite to the light emitting surface.
  • the quantum dot module 200 is also disposed between the light incident surface of the light guide plate 100 and the light exit surface of the light guide plate 100.
  • the light guide plate 100 is formed by an injection molding process, and the material of the light guide plate 100 is polymethyl methacrylate. A corresponding design can be made in the mold for preparing the light guide plate 100 to prepare the light guide plate 100 having the accommodating cavity, and the quantum dot module is embedded in the accommodating cavity of the light guide plate 100 200.
  • the PMMA material has strong hygroscopicity and has good airtightness. Therefore, selecting the material of the light guide plate 100 as PMMA can prevent the influence of moisture on the quantum dot module 200 to prevent the The quantum dot module 200 fails in reaction with water and oxygen. In addition, since the quantum dots are easily quenched by heat at high temperatures, the quantum dot module 200 is thermally deactivated.
  • the thermal conductivity of the PMMA material is weak, and the material of the light guide plate 100 is selected as PMMA. Therefore, when the light source is disposed adjacent to the light incident surface 110 of the light guide plate 100, the light guide plate 100 can be well. The heat emitted by the light source is isolated to avoid quenching of quantum dots in the quantum dot module 200 when heated. At the same time, the PMMA material has a good UV transmittance. Therefore, the light guide plate 100 is not suitable for yellowing and yellowing when the quantum dot module 200 is subsequently formed.
  • the quantum dot module 200 includes quantum dot powder.
  • a process of the quantum dot module 200 is simply described as follows.
  • a quantum dot suspension colloid formed by mixing a quantum dot powder in a substrate for example, an acrylic resin, preferably, PMMA
  • a quantum dot suspension colloid is subjected to a curing process.
  • a quantum dot module 200 is formed.
  • the curing process can be cured by irradiation with UV light.
  • the quantum dot module 200 includes a first surface 210, a second surface 220, a third surface 230, and a fourth surface 240.
  • the first surface 210 is disposed opposite to the second surface 220
  • the third surface 230 is disposed opposite to the fourth surface 240
  • the third surface 230 is respectively associated with the first surface 210 and the
  • the second surface 220 intersects the first surface 210 and the second surface 220, respectively, the first surface 210 is adjacent to the light incident surface compared to the second surface 220 110, the third surface 230 is disposed adjacent to the light emitting surface 120, the fourth The bottom surface 240 is disposed adjacent to the bottom surface 130.
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100 , and/or the fourth surface 240 protrudes from the bottom surface 130 of the light guide plate 100 .
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100, and the fourth surface 240 is flush with the bottom surface 130 of the light guide plate, thereby the light guide plate 100 and the quantum Point module 200 forms an inverted "T".
  • the light guide plate 100 and the quantum dot module 200 as an inverted "T"
  • the area of the quantum dot module 200 adjacent to the light exit surface 120 is increased. Therefore, from the backlight module 10 When the light emitted by the light source enters the light guide plate 100, it can better interact with the quantum dots in the quantum dot module 200 to improve the performance of the light emitted from the quantum dot module 200.
  • the third surface 230 is flush with the light emitting surface 120 of the light guide plate 100 , and the fourth surface 240 protrudes from the bottom surface 130 of the light guide plate 100 .
  • the light guide plate 110 and the quantum dot module 200 form a "T" word.
  • the area of the quantum dot module 200 adjacent to the light exit surface 120 is increased, and therefore, the light source from the backlight module 10 is emitted.
  • the light enters the light guide plate 100 it can better interact with the quantum dots in the quantum dot module 200 to improve the performance of the light emitted from the quantum dot module 200.
  • the third surface 230 protrudes from the light emitting surface 120 of the light guide plate 100
  • the fourth surface 240 protrudes from the light guide plate 100 .
  • the light guide plate 110 and the quantum dot module 200 form a "ten" word.
  • the area of the quantum dot module 200 adjacent to the light emitting surface 120 is increased, and therefore, the light source from the backlight module 10 is emitted.
  • the light enters the light guide plate 100 it can better interact with the quantum dots in the quantum dot module 200 to improve the performance of the light emitted from the quantum dot module 200.
  • the first surface 210 is parallel to the light incident surface 110 of the light guide plate 100.
  • the first surface 210 is parallel to the light incident surface 110 of the light guide plate 100, there is no between the light incident surface 110 of the light guide plate 100 and the first surface 210 of the quantum dot module 200.
  • An angle is formed to avoid entering the quantum dot module 200 due to the presence of an angle when the light entering from the light incident surface 110 of the light guide plate 100 re-enters the first surface 210 of the quantum dot module 200
  • the brightness of the portion of the rear light guide plate 100 is different.
  • the light guide plate 100 is integrally formed with the quantum dot module 200.
  • the backlight module 100 further includes a light source 300, a reflective sheet 400, and an optical film 500.
  • the light source 300 is disposed adjacent to the light incident surface 110 of the light guide plate 100, and the light source 300 is configured to emit a first light.
  • the light emitted from the light source 300 enters one end of the light guide plate 100 through the light incident surface 110 of the light guide plate 100.
  • the first light passes through the quantum dot module 200 to form a second light, enters the remaining portion of the light guide plate 100, and exits through the light exit surface 120 of the light guide plate 100.
  • the light source 300 is a blue light emitting diode.
  • the first light emitted by the light source 300 is blue light, and the first light is used to excite the quantum dot module 200 to generate red and green light.
  • the blue light emitted by the light source 300 is mixed with the red-green light generated by the quantum dot module 200 to generate a high-color white second light.
  • the reflective sheet 400 is disposed adjacent to the bottom surface 130 of the light guide plate 100.
  • a first light emitted from the light source 300 and a second light generated after passing through the quantum dot module 200 enter a portion of the light guide plate 100, and a portion of the first light and a portion of the second light pass through the guide.
  • the bottom surface 130 of the light panel 100 is emitted. If a part of the first light or part of the second light passes through the bottom surface 130 of the light guide plate 100, the light emitted through the light exit surface 120 is reduced. The light emitted from the backlight module 10 to the display panel in the liquid crystal display device is reduced, thereby affecting the brightness of the display panel.
  • the reflective sheet 400 is disposed on the bottom surface 130 of the light guide plate 100 such that light emitted from the bottom surface 130 of the light guide plate 100 passes through the reflection of the reflective sheet 400 to enter the light guide plate again.
  • the light emitted through the light-emitting surface 120 is increased, thereby increasing the light emitted from the backlight module 10 to the display panel of the liquid crystal display device, thereby improving the brightness of the display panel.
  • the number of the optical films 500 is at least one, and the optical film 500 is disposed adjacent to the light-emitting surface 120.
  • the optical film 500 is a brightness enhancement film for improving the light extraction efficiency of the second light emitted to the display panel in the display device.
  • the brightness enhancement film may be a normal prism sheet, a multi-function prism sheet, a micro-lens film, a reflective polarizer, or the like.
  • the backlight module 10 of the present invention embeds the quantum dot module 200 in the light guide plate 100, and the quantum dot module 200 is disposed on the light incident surface 110 of the light guide plate 100. Between the illuminating surface 120 and the illuminating surface 120, the quantum dot module 200 is not exposed to the air and thus will not be empty. The oxygen in the gas reacts with the water vapor to make the quality of the light emitted through the backlight module 10 better. Further, the liquid crystal display device using the backlight module 10 has a better display screen.
  • FIG. 5 is a flow chart of a method for fabricating a backlight module according to a preferred embodiment of the present invention.
  • the method for preparing the backlight module includes, but is not limited to, the following steps.
  • a accommodating groove is formed on the light guide plate 100.
  • the accommodating groove is disposed between the light incident surface 110 of the light guide plate 100 and the light emitting surface 120 of the light guide plate 100. a notch that communicates with the receiving groove and the outside.
  • Step S102 filling the accommodating groove with the quantum dot colloid through the notch.
  • the quantum dot colloid is a colloid formed by mixing quantum dots into a substrate such as an acrylic resin, preferably PMMA.
  • Step S103 curing the quantum dot colloid to form a quantum dot module 200.
  • the gap may be away from the gap.
  • One end of the quantum dot colloid is cured in the direction of the gap to form the quantum dot module 200.
  • the step of curing the quantum dot colloid to form the quantum dot module 200 is performed in an environment that is insulated from water and oxygen so that oxygen and water vapor in the air affect the quantum dots.
  • Step S104 sealing the gap.
  • the gap can be sealed by a dispenser using a sealing gel, and then the sealing gel that seals the gap is cured.
  • the material of the sealing gel is the same as the material of the light guide plate, and the material of the sealing gel may be UV glue.
  • the substrate into which the quantum dots are incorporated is an acrylic resin
  • the following steps are further included between the step S101 and the step S102.
  • step I the quantum dot powder is mixed into the acrylic resin to form a quantum dot suspension colloid.
  • Step II shaking and stirring the quantum dot suspension colloid to uniformly mix the quantum dot powder In the acrylic resin.
  • step III the quantum dot suspension colloid uniformly mixed is subjected to centrifugal defoaming treatment.
  • the gas in the quantum dot suspension colloid can be discharged.

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  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Un module de rétro-éclairage (10) comprend une plaque de guidage de la lumière (100) et un module à points quantiques (200). La plaque de guidage de la lumière (100) comporte une surface (110) d'entrée de lumière et une surface (120) de sortie de lumière. Le module à points quantiques est incorporé dans la plaque de guidage de la lumière, et est agencé entre la surface d'entrée de lumière et la surface de sortie de lumière de la plaque de guidage de la lumière. Les points quantiques sont remplis dans le module à points quantiques. L'invention concerne également un procédé de préparation du module de rétro-éclairage.
PCT/CN2015/088426 2015-08-04 2015-08-28 Module de rétroéclairage et procédé de préparation pour module de rétro-éclairage WO2017020381A1 (fr)

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CN201510472562.0A CN105090823B (zh) 2015-08-04 2015-08-04 背光模组及背光模组的制备方法
CN201510472562.0 2015-08-04

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WO2017020381A1 true WO2017020381A1 (fr) 2017-02-09

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CN105700242B (zh) * 2016-04-29 2019-04-05 深圳市华星光电技术有限公司 背光模组及双面液晶显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102628580A (zh) * 2011-11-30 2012-08-08 友达光电股份有限公司 导光板结构、背光模块及其制造方法
CN102937268A (zh) * 2012-11-15 2013-02-20 京东方科技集团股份有限公司 一种导光板、背光模组和显示装置
KR20130024152A (ko) * 2011-08-30 2013-03-08 엘지이노텍 주식회사 라이트 유닛 및 표시장치
CN103459549A (zh) * 2011-03-31 2013-12-18 松下电器产业株式会社 荧光薄膜以及显示薄膜
CN204345536U (zh) * 2014-12-26 2015-05-20 翰博高新材料(合肥)股份有限公司 一种侧入式背光模组的量子点材料导光板

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104730619A (zh) * 2015-03-27 2015-06-24 深圳市华星光电技术有限公司 导光板及具有该导光板的背光模块和液晶显示器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103459549A (zh) * 2011-03-31 2013-12-18 松下电器产业株式会社 荧光薄膜以及显示薄膜
KR20130024152A (ko) * 2011-08-30 2013-03-08 엘지이노텍 주식회사 라이트 유닛 및 표시장치
CN102628580A (zh) * 2011-11-30 2012-08-08 友达光电股份有限公司 导光板结构、背光模块及其制造方法
CN102937268A (zh) * 2012-11-15 2013-02-20 京东方科技集团股份有限公司 一种导光板、背光模组和显示装置
CN204345536U (zh) * 2014-12-26 2015-05-20 翰博高新材料(合肥)股份有限公司 一种侧入式背光模组的量子点材料导光板

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CN105090823A (zh) 2015-11-25

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