WO2018233187A1 - Module de rétroéclairage et dispositif d'affichage - Google Patents

Module de rétroéclairage et dispositif d'affichage Download PDF

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Publication number
WO2018233187A1
WO2018233187A1 PCT/CN2017/110181 CN2017110181W WO2018233187A1 WO 2018233187 A1 WO2018233187 A1 WO 2018233187A1 CN 2017110181 W CN2017110181 W CN 2017110181W WO 2018233187 A1 WO2018233187 A1 WO 2018233187A1
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WO
WIPO (PCT)
Prior art keywords
light
quantum dots
blue
red
green
Prior art date
Application number
PCT/CN2017/110181
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English (en)
Chinese (zh)
Inventor
邓天应
强科文
陈细俊
Original Assignee
深圳Tcl新技术有限公司
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Filing date
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Application filed by 深圳Tcl新技术有限公司 filed Critical 深圳Tcl新技术有限公司
Publication of WO2018233187A1 publication Critical patent/WO2018233187A1/fr

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Classifications

    • 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
    • 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 liquid crystal display technology, and in particular, to a backlight module and a display device.
  • liquid crystal display televisions generally include a backlight module and a liquid crystal display panel.
  • the liquid crystal display panel itself does not emit light, and the backlight module is required to provide sufficient excitation light with uniform brightness and distribution, so that the display panel can display images normally.
  • the excitation light source provided on the backlight module is a white light excitation light source, and the traditional liquid crystal display panel is driven by the white light excitation light source for image display, wherein the white excitation light source mainly has a mixture of red, green and blue primary colors.
  • the prior art mainly encapsulates the red and green quantum dots in a glass tube (by brackets The glass tube encapsulating the quantum dot is assembled and fixed in front of the excitation light source or in the optical film, and then the blue light emitted by the blue chip is used to excite the red and green quantum dots, and then the blue light emitted by the blue chip and the red and green quantum dots.
  • the white light is mixed with the red and green light emitted by the excitation to improve the color gamut and image quality of the display.
  • the white light formed by the combination of red and green light excited by the red and green quantum dots cannot realize the image quality display of the ultra-wide color gamut.
  • the main object of the present invention is to provide a backlight module, which aims to excite red quantum dots, green quantum dots and blue quantum dots by an excitation light source to obtain red, green and blue light with better color purity, and the color purity is more
  • the white light mixed with red light, green light and blue light realizes the image quality display of the super wide color gamut of the display.
  • a backlight module is provided by the present invention, and the backlight module includes:
  • the wavelength of the emitted light is less than the wavelength of the blue light
  • An optical component set the optical component set is located on a light exiting side of the excitation light source, the optical component set includes a light guide plate and an optical film;
  • red quantum dot a red quantum dot, a green quantum dot, and a blue quantum dot
  • red quantum dot a red quantum dot
  • green quantum dot a green quantum dot
  • blue quantum dot wherein the red quantum dot, the green quantum dot, and the blue quantum dot are disposed in the optical component group, and an optical path in the optical component group passes through the red quantum Points, green quantum dots, and blue quantum dots;
  • the light emitted by the excitation light source excites red, green, and blue light respectively emitted by the red quantum dots, the green quantum dots, and the blue quantum dots to form white light.
  • the light guide plate has oppositely disposed reflective surfaces and light exiting surfaces and a light incident surface disposed opposite to the excitation light source, wherein the reflective surface and the light exiting surface are both perpendicular to the light incident surface;
  • the optical film is located on one side of the light emitting surface of the light guide plate.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are all disposed on the same optical component.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on a light incident surface of the light guide plate.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on a reflective surface of the light guide plate.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on a light incident surface of the optical film, and a light incident surface of the optical film is opposite to a light emitting surface of the light guide plate.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are each packaged in a glass tube of a certain size, and the glass tube is fixed directly in front of the excitation light source by a fixing bracket.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are respectively disposed on different optical components, and the red quantum dots, the green quantum dots, and the blue quantum dots are excited by the near excitation light source end.
  • the light source ends are arranged in order.
  • the red quantum dot is disposed on a light incident surface of the light guide plate
  • the green quantum dot is disposed on a reflective surface of the light guide plate
  • the blue quantum dot is disposed on an optical film. Glossy.
  • the red quantum dots and the green quantum dots are proportionally mixed and disposed on the light incident surface of the light guide plate, and the blue quantum dots are disposed on the reflective surface of the light guide plate or the light incident on the optical film.
  • the red quantum dots and the green quantum dots are proportionally mixed and disposed on the reflective surface of the light guide plate, and the blue quantum dots are disposed on the light incident surface of the optical film.
  • the red quantum dot is disposed on a light incident surface of the light guide plate, and the green quantum dot and the blue quantum dot are proportionally mixed and disposed on a reflective surface of the light guide plate or a light incident on the optical film.
  • the red quantum dots are disposed on the reflective surface of the light guide plate, and the green quantum dots and the blue quantum dots are proportionally mixed and disposed on the light incident surface of the optical film.
  • the excitation light source has a violet light emitter or an ultraviolet light emitter.
  • a mesh dot is disposed on the reflective surface of the light guide plate, and the mesh dots are arranged on the reflective surface in proportion.
  • the backlight module further includes a glass tube fixed in front of the excitation light source by a fixing bracket, and the red quantum dot, the green quantum dot and the blue quantum dot are encapsulated in the glass tube .
  • the optical component further includes a diffusion plate and a lens, and the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on the diffusion plate or the lens.
  • the excitation light source has a violet light emitter or an ultraviolet light emitter.
  • the present invention further provides a display device, characterized in that the display device comprises the backlight module described above.
  • red quantum dots, green quantum dots and blue quantum dots are arranged on the optical component group of the backlight module, and the light emitted by the excitation light source excites red quantum dots, green quantum dots and blue quantum dots to excite red.
  • Light, green and blue light, while the red, green and blue colors emitted by quantum dots are characterized by high color purity. Therefore, the white light mixed by red, green and blue light is excited to achieve ultra-wide color gamut. The quality of the display.
  • FIG. 1 is a schematic structural view of a backlight module of the present invention
  • FIG. 2 is a schematic diagram of optical path propagation of a first embodiment of a backlight module of the present invention
  • FIG. 3 is a schematic diagram of optical path propagation of a second embodiment of a backlight module of the present invention.
  • FIG. 4 is a schematic diagram of optical path propagation of a third embodiment of a backlight module of the present invention.
  • Label name Label name 10 Backlight module border 50
  • Light guide 20 PCB board 51 Light-incident surface of the light guide plate twenty one Excitation source 52
  • a reflective sheet 60 Optical diaphragm 61
  • the directional indication is only used to explain in a certain posture (as shown in the figure).
  • first”, “second”, etc. in the embodiments of the present invention, the description of the "first”, “second”, etc. is used for the purpose of description only, and is not to be construed as an Its relative importance or implicit indication of the number of technical features indicated.
  • features defining “first” and “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • FIG. 1 is a schematic structural view of a backlight module of the present invention.
  • the invention provides a backlight module, which comprises an excitation light source 21, an optical component group (not labeled), red quantum dots, green quantum dots and blue quantum dots.
  • the wavelength of the light emitted by the excitation light source 21 is smaller than the wavelength of the blue light. Based on the principle that the shorter the wavelength, the larger the energy, the light having a shorter wavelength is used to excite the light of a longer wavelength, so that the light of a long wavelength can be sufficiently excited.
  • the optical component group is located on a light exiting side of the excitation light source 21, and the optical component group includes a light guide plate 50 and an optical film 60.
  • the red quantum dots, green quantum dots, and blue quantum dots are disposed in the optical component group, and optical paths in the optical component group pass through the red quantum dots, green quantum dots, and blue quantum dots.
  • the light emitted by the excitation light source 21 excites the red, green and blue light respectively emitted by the red quantum dots, the green quantum dots and the blue quantum dots to form white light.
  • the backlight module further includes a backlight module frame 10, a PCB board 20, a back board 30, and a heat sink 40.
  • the backlight module frame 10 and the back board 30 are combined into a cavity.
  • the heat sink 40 is located in the cavity and adjacent to the inner wall of the cavity, and the PCB board 20 is located on the heat sink 40. During the operation of the PCB board 20, the heat sink 40 dissipates heat to ensure its use.
  • the excitation light source 21 is disposed on the PCB board 20 and electrically connected to the excitation light source 21 on the PCB board 20, and the optical component group is located at a relative position of the light-emitting side of the excitation light source 21.
  • the PCB board 20 controls the excitation light source 21 to emit light, and the light emitted by the excitation light source 21 passes through the light guide plate 50 and the optical film 60 to be emitted onto the display panel, so that the display panel can display the picture normally.
  • the light emitted onto the display panel is white light
  • the white light is generally formed by mixing three primary colors of light, that is, between the excitation light source 21 and the display panel, three primary colors of light are mixed to form white light required for the display panel.
  • red quantum dots, green quantum dots and blue quantum dots are arranged on the optical component group of the backlight module, and the light emitted by the excitation light source 21 excites red quantum dots, green quantum dots and blue quantum dots to excite Red, green and blue light, while the red, green and blue colors emitted by quantum dots are characterized by high color purity. Therefore, the white light mixed by red, green and blue light is super-wide. The image quality of the field is displayed.
  • the light guide plate 50 has oppositely disposed reflective surfaces 52 and light exiting surfaces 53 and a light incident surface 51 disposed opposite to the excitation light source 21, and the reflective surface 52 and the light exiting surface 53 are both inward
  • the optical surface 50 is perpendicular to the light-emitting surface 53 of the light guide plate 50, and one surface of the optical film 60 facing the light guide plate 50 is a light-incident surface 61 of the optical film.
  • the light emitted by the excitation light source 21 enters the light guide plate 50 through the light incident surface 51 of the light guide plate, part of the light is directly emitted from the light exit surface 53, and part of the light is transmitted to the reflective surface 52 to be reflected, and then the light is emitted.
  • the surface 53 is emitted, and the light is emitted from the light-emitting surface 53 and enters the optical film 60. After the light is collected by the optical film 60, it is incident on the display panel.
  • the reflective surface 52 is arranged with mesh dots, and the mesh dots are arranged in a certain proportion, and the mesh dots are arranged on the reflective surface 52, so that when the light is irradiated onto the reflective surface 52, irregular reflection occurs, so that the light can be After being diffused by the arbitrary angle of light, the light is emitted, and by arranging the dots to be arranged in a certain ratio, the light reaches a uniform surface excitation light source 21 effect during the reflection process.
  • a reflective sheet 54 is further disposed on the reflective surface 52. The reflection sheet 54 mainly makes the reflection surface 52 reflect the effect of the excitation light source 21 better.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on one of the optical components, and specifically, the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on the same optical component.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed; or the red quantum dots, the green quantum dots, and the blue quantum dots may be respectively disposed on different optical components, and the red quantum The dot, the green quantum dot and the blue quantum dot are arranged in sequence from the near excitation light source end to the far excitation light source end; or, the two quantum dots of the red quantum dot, the green quantum dot and the blue quantum dot are mixed and disposed on On one optical component, one of the quantum dots is disposed on the other optical component. in particular:
  • FIG. 2 is a schematic diagram of optical path propagation of a first embodiment of a backlight module of the present invention.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on the light incident surface 51 of the light guide plate. That is, the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed and disposed on the light incident surface 51 of the light guide plate.
  • the light emitted by the excitation light source 21 first enters the light incident surface 51 of the light guide plate 50 opposite to the excitation light source 21, and the light excites the red quantum dot, the green quantum dot and the blue light on the light incident surface 51 of the light guide plate.
  • the quantum dots cause red, green, and blue quantum dots to be excited by red, green, and blue light, respectively, and the red, green, and blue light that is excited is mixed with white light and then partially emitted from the light guide plate.
  • the surface 53 is emitted, partially reflected by the reflective surface 52, and then emitted from the light-emitting surface 53 and brightened by the optical film 60 to be incident on the display panel.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed and disposed on the light incident surface 51 of the light guide plate. Since the light incident surface 51 of the light guide plate is located on the light exiting side of the excitation light source 21, the excitation light source is excited. After the light emitted by 21 reaches the light guide plate, red quantum dots, green quantum dots and blue quantum dots are excited, and the light emitted by the excitation light source 21 loses less during propagation, and can excite red quantum dots, green quantum dots and blue quantum dots.
  • the red light, the green light and the blue light are released, so that the red light, the green light and the blue light are mixed to form more white light, and since the light incident surface 51 of the light guide plate is close to the excitation light source 21, the red quantum dot and the green quantum dot are made. And blue quantum dots can be quickly excited to release.
  • FIG. 3 is a schematic diagram of optical path propagation of a second embodiment of a backlight module according to the present invention.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on the reflective surface 52 of the light guide plate 50. That is, the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed and disposed on the reflective surface 52 of the light guide plate 50.
  • the light emitted from the excitation light source 21 is incident on the light guide plate 50 through the light incident surface 51 of the light guide plate, and then incident on the light reflecting surface 52, the light excites the red quantum dots, the green quantum dots, and the blue quantum disposed on the light guide plate 50.
  • the red quantum dot, the green quantum dot and the blue quantum dot are respectively excited to emit red light, green light and blue light, and the red, green light and blue light excited by the red light, green light and blue light are directly emitted from the light exit surface 53 after being mixed with white light. After being brightened by the optical film 60, it is incident on the display panel.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed and disposed on the reflective surface 52 of the light guide plate 50, and the red light quantum dots are excited when the light emitted by the excitation light source 21 passes through the reflective surface 52.
  • the red, green and blue light emitted by the green quantum dots and the blue quantum dots are mixed into white light and directly emitted through the light exit surface 53 to reduce the loss of white light on the light guide plate 50, and the reflective surface provided with the dots
  • the red quantum dots, the green quantum dots and the blue quantum dots are excited on 52, and the formed white light is diffused and reflected by the dots, so that the white light reaches the uniform surface excitation light source 21 effect during the reflection process.
  • FIG. 4 is a schematic diagram of optical path propagation of a third embodiment of a backlight module of the present invention.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are disposed on the light incident surface 61 of the optical film, and the light incident surface 61 of the optical film and the guide The light exit surface 53 of the light plate is opposite.
  • the light emitted from the excitation light source 21 is incident on the light guide plate 50 by the light incident surface 51 of the light guide plate, and is partially emitted from the light exit surface 53 when partially meeting the exit angle of the light exit surface, and partially directly incident on the light reflecting surface 52, and the reflective surface 52 is directly incident on the light reflecting surface 52.
  • the light exit surface 53 is emitted, and when incident on the optical film 60, the red quantum dots, the green quantum dots, and the blue quantum dots disposed on the light incident surface 61 of the optical film are excited, so that the red quantum dots and the green quantum
  • the dots and the blue quantum dots are respectively excited to emit red light, green light, and blue light, and the red, green, and blue light rays excited are white light and then directly brightened through the optical film 60 to be incident on the display panel.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are mixed in a certain ratio, and the red quantum dots, the green quantum dots, and the blue quantum dots are formed into a quantum dot film, and then the quantum dot film is further formed. It is disposed on the light incident surface of the optical film 60.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are proportionally mixed and disposed on the light incident surface 61 of the optical film, and the light emitted by the excitation light source 21 passes through the light incident surface of the optical film.
  • the red, green and blue light emitted by the red quantum dots, the green quantum dots and the blue quantum dots are mixed into white light, and then directly passed through the optical film 60 to be brightened and then directed to the display panel, and the white light is lost during propagation. less.
  • the red quantum dots, the green quantum dots and the blue quantum dots can also be packaged in a glass tube (not shown) of a certain size, and the glass tube is fixed to the excitation light source 21 by a fixing bracket.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are mixed in a certain ratio, and then encapsulated in a glass tube, and then the glass tube is fixed directly in front of the excitation light source 21, and the light emitted from the excitation light source 21 passes through the glass tube.
  • the red quantum dots, the green quantum dots, and the blue quantum dots can be excited to mix red, green, and blue light to form white light.
  • the red quantum dot is disposed on the light incident surface 51 of the light guide plate, and the green quantum dot is disposed on the light guide plate 50.
  • the blue quantum dots are disposed on the light incident surface 61 of the optical film 60.
  • the red quantum dots, the green quantum dots, and the blue quantum dots are sequentially arranged from the near excitation light source end to the far excitation light source end, and the wavelengths of the red, green, and blue light are sequentially shortened, and the energy of the light is sequentially Strongening, the red quantum dot is set at the near excitation light source end.
  • the red quantum dot When the light emitted by the excitation light source excites the red quantum dot to emit red light, when the red light propagates to the green quantum dot, since the red light energy is less than the green light, the red light Unable to excite green light, green quantum dots can only be excited by the light emitted by the excitation source.
  • red and green light propagates to the blue quantum dots
  • the energy of both red and green light is less than blue light
  • red light and None of the green light can excite blue quantum dots
  • blue quantum dots can only be excited by the light emitted by the excitation source.
  • the red quantum dot is disposed at the near excitation source end, and the blue quantum dot is disposed at the high beam end, so that the light emitted by the previously excited quantum dot can be prevented from being absorbed by the excited light (for example, blue light can excite red light and Green light, if the blue light is located at the low-end end, when the blue light excites the red quantum dot and the green quantum dot, part of the energy is absorbed by the red or green light, so that the light conversion efficiency is lost, resulting in low light energy.
  • the excited light for example, blue light can excite red light and Green light, if the blue light is located at the low-end end, when the blue light excites the red quantum dot and the green quantum dot, part of the energy is absorbed by the red or green light, so that the light conversion efficiency is lost, resulting in low light energy.
  • the light emitted by the excitation light source 21 is first incident on the light incident surface 51 of the light guide plate 50 opposite to the excitation light source 21, and the red quantum dots are excited when the light is incident on the light incident surface 51 of the light guide plate, so that the red quantum dots are
  • the red light and the light emitted by the excitation light source 21 are transmitted to the reflective surface 52 of the light guide plate 50, the light emitted by the excitation light source 21 excites the green quantum dot, so that the green quantum dot excites the green light, and the excited
  • the green light and the light emitted from the excitation light source 21 are emitted from the light exit surface 53 of the light guide plate, and are incident on the optical film 60 to excite the light emitted from the light source.
  • the light incident surface 61 of the optical film When the red light and the green light are incident on the light incident surface 61 of the optical film, the light is excited.
  • the light emitted by the light source excites the blue quantum dots to emit blue light, and the red, green and blue light excited on the light guide plate 50 and the optical film 60 in turn form white light on the optical film 60 and is incident on the display panel.
  • the red quantum dot is encapsulated in a glass tube of a certain size, and the glass tube is fixed in front of the excitation light source 21 by a fixing bracket, and the green quantum dot is disposed on the light incident surface 51 of the light guide plate.
  • the blue quantum dots are disposed on the light incident surface 61 of the optical film. That is, the light emitted by the excitation light source 21 first emits red light through the glass tube to excite the red quantum dot, and then passes through the light incident surface 51 or the reflective surface 52 of the light guide plate to excite the green quantum dot to emit green light, and finally the blue light is excited by the optical film 60.
  • the color quantum dots emit green light, which in turn is excited by red, green and blue light to form white light.
  • the red quantum dots, the green quantum dots, and the blue quantum dots may be combined on different optical components, that is, the red quantum dots and the green quantum dots are uniformly mixed on an optical component, blue The quantum dots are disposed on another optical component; or, the red quantum dots are disposed on one optical component, and the green quantum dots and the blue blue quantum dots are disposed on the other optical component.
  • the optical component with reddish quantum dots is a near excitation light source end
  • the optical component with blue quantum dot design is a far excitation light source.
  • the red quantum dots and the green quantum dots are mixed in a certain ratio and disposed on the light incident surface 51 of the light guide plate or the reflective surface 52 of the light guide plate 50 or encapsulated in a glass tube, wherein the glass tube is fixed by the bracket
  • the light source 21 is directly in front of the excitation light source 21, and the blue quantum dots are correspondingly disposed on the light reflecting surface 52 of the light guide plate 50 or the light incident surface 61 of the optical film or the light incident surface 51 of the light guide plate.
  • the red quantum dots are disposed on the light incident surface 51 or the reflective surface 52 of the light guide plate or encapsulated in a glass tube, and the green quantum dots and the blue quantum dots are mixed in a certain ratio and correspondingly disposed in the The light reflecting surface 52 of the light guide plate 50 or the light incident surface 61 of the optical film or the light incident surface 51 of the light guide plate is described.
  • the optical component of the backlight module further includes a diffusion plate (not labeled) and a lens (not labeled), and the red quantum dots, the green quantum dots, and the blue quantum dots can also be disposed in the On the diffuser plate and lens.
  • the quantum dots can also be disposed in a glass tube (not shown), and the glass tube is fixedly disposed in front of the excitation light source 21 through the bracket.
  • the excitation light source 21 has a violet light emitter or an ultraviolet (UV) light emitter.
  • the light emitted by the excitation light source 21 for exciting the red quantum dots, the green quantum dots, and the blue quantum dots is violet or ultraviolet light, and the wavelengths of the violet light and the ultraviolet light are shorter than the wavelengths of the blue light, the green light, and the red light, and It has higher energy than blue light, green light and red light, and uses blue or ultraviolet light to excite blue light, green light and red light.
  • the excitation efficiency of blue light, green light and red light is high.
  • the first compound includes CdSe, CdTe, MgS, MgSe, MgTe, CaS, CaSe, CaTe, SrS, SrSe, SrTe, BaS, BaSe, BaTe, ZnS, ZnSe, ZnTe
  • the second compound includes GaN, GaP, GaAs, InN, InP, and InAs.
  • the embodiment of the invention further provides a display device, which comprises the above backlight module.
  • the specific structure of the backlight module refers to the above embodiment. Since the backlight module adopts all the technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are not included herein. Narration.

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

Abstract

La présente invention concerne un module de rétroéclairage et un dispositif d'affichage. Le module de rétroéclairage comprend : une source de lumière d'excitation (21) émettant de la lumière ayant une longueur d'onde plus courte qu'une longueur d'onde de lumière bleue ; et un ensemble de composants optiques positionné au niveau d'un côté d'émission de lumière de la source de lumière d'excitation (21) ; un point quantique rouge ; un point quantique vert ; et un point quantique bleu. Le point quantique rouge, le point quantique vert et le point quantique bleu sont disposés à l'intérieur de l'ensemble de composants optiques, et un trajet optique dans l'ensemble de composants optiques passe à travers le point quantique rouge, le point quantique vert et le point quantique bleu. La lumière émise par la source de lumière d'excitation (21) excite le point quantique rouge, le point quantique vert et le point quantique bleu pour émettre respectivement de la lumière rouge, de la lumière verte et de la lumière bleue, et les lumières rouge, verte et bleue sont mélangées pour former une lumière blanche. En disposant le point quantique rouge, le point quantique vert et le point quantique bleu au niveau de l'ensemble de composants optiques du module de rétroéclairage, les lumières rouge, verte et bleue émises par le point quantique rouge, le point quantique vert et le point quantique bleu excités par la lumière émise par la source de lumière d'excitation (21) ont des niveaux de pureté élevés, de telle sorte que la lumière blanche formée à partir des lumières rouge, verte et bleue mélangées réalise l'affichage d'images à l'aide d'une gamme de couleurs ultra-large.
PCT/CN2017/110181 2017-06-22 2017-11-09 Module de rétroéclairage et dispositif d'affichage WO2018233187A1 (fr)

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CN107420804A (zh) * 2017-09-07 2017-12-01 合肥惠科金扬科技有限公司 量子点背光模组及显示装置
CN107783223B (zh) * 2017-09-27 2019-08-16 深圳Tcl新技术有限公司 背光模组及显示装置
CN109946879A (zh) * 2019-03-05 2019-06-28 惠州市创亿达新材料有限公司 量子点背光模组
CN114755861B (zh) * 2022-06-15 2023-01-06 广东欧迪明光电科技股份有限公司 一种高效率量子点光学基片及其制备方法

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