WO2020015399A1 - Plaque de guidage de lumière et dispositif d'affichage - Google Patents

Plaque de guidage de lumière et dispositif d'affichage Download PDF

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Publication number
WO2020015399A1
WO2020015399A1 PCT/CN2019/082293 CN2019082293W WO2020015399A1 WO 2020015399 A1 WO2020015399 A1 WO 2020015399A1 CN 2019082293 W CN2019082293 W CN 2019082293W WO 2020015399 A1 WO2020015399 A1 WO 2020015399A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light
light guide
bubble
bubbles
Prior art date
Application number
PCT/CN2019/082293
Other languages
English (en)
Chinese (zh)
Inventor
程加河
Original Assignee
惠科股份有限公司
重庆惠科金渝光电科技有限公司
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.)
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Application filed by 惠科股份有限公司, 重庆惠科金渝光电科技有限公司 filed Critical 惠科股份有限公司
Publication of WO2020015399A1 publication Critical patent/WO2020015399A1/fr

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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
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk 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
    • G02B6/005—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

Definitions

  • the present application relates to the field of display technology, and in particular, to a light guide plate and a display device including the light guide plate.
  • a surface light source is often formed by combining a light guide plate with an edge-type light source.
  • the light emitted by the edge-type light source enters the light guide plate from the light entrance surface on one side of the light guide plate, and then passes through the light guide points on the light guide plate. After being emitted and diffused, it is emitted from the light exit surface of the light guide plate to provide the panel with the light required for work.
  • the light guide plate needs to reach a certain thickness, which results in an increase in the thickness of the display, which does not meet the current trend of lightweight display development.
  • embodiments of the present application provide a light guide plate and a display device.
  • a light guide plate provided in an embodiment of the present application is used for a display device, and the light guide plate includes: a main body, and air bubbles for reducing weight and atomizing light are formed in the main body; The light incident surface is located on the side of the body; and the light emitting surface is located on the top of the body; wherein the air bubbles are formed by a foaming agent; the light guide plate is made of polymethyl methacrylate material or transparent Made of polycarbonate material; the air bubbles in the body are evenly distributed, the diameter of the air bubbles is 0.1mm to 2mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.
  • An embodiment of the present application further provides a light guide plate for a display device.
  • the light guide plate includes a body, a light incident surface on a side of the body, and a light emitting surface on a top of the body. bubble.
  • the air bubbles in the body are evenly distributed, and the diameter of the air bubbles is 0.1 mm to 2 mm; the volume ratio of the air bubbles to the body is 1: 9 to 4: 6.
  • the body includes a bubble that makes the light guide plate have a hollow structure; in a direction perpendicular to the light exit surface, the bubble is circular or rectangular, and the bubble is provided in the body Inside the center.
  • the light guide plate includes a reflective surface opposite to the light emitting surface; a center line of the air bubble is centrally disposed between the reflective surface and the light emitting surface, or is biased toward the reflective surface. Between the reflecting surface and the light emitting surface, the thickness of the bubble is 0.1 mm to 3 mm.
  • the light guide plate includes a reflecting surface opposite to the light emitting surface; the air bubbles in the body are located on the same plane, the plane is parallel to the light emitting surface, and is close to the reflecting surface and away from the reflecting surface.
  • the light emitting surface is described; the diameter of the bubbles is 0.3 mm to 1.5 mm; and the volume ratio of the bubbles to the body is 1: 9 to 3: 7.
  • the light guide plate includes a reflective surface opposite to the light emitting surface; air bubbles in the body are located on two mutually parallel planes between the light emitting surface and the reflecting surface; the two planes and The light emitting surface and the reflecting surface are parallel; two planes are close to the reflecting surface and far from the light emitting surface; the diameter of the bubble is 0.1mm to 1.5mm; the ratio of the volume of the bubble to the body is 1: 9 to 4: 6.
  • the body includes a central region and a peripheral region surrounding the central region, and bubbles in the peripheral region are denser than bubbles in the central region; and the diameter of the bubbles is 0.1 mm to 1.5 mm;
  • the central area is a symmetrical figure or a special figure;
  • the bubble volume ratio in the peripheral region is 2: 8 to 3: 7; the bubble volume ratio in the central region is 1: 9 to 2: 8.
  • the air bubbles in the main body maintain a distance from the light incident surface, and the distance is 2 to 10 mm; and the central region is rectangular or circular.
  • a display device provided in an embodiment of the present application includes any one of the light guide plates described above.
  • the air bubbles are formed of a foaming agent and are used for weight reduction and atomization of light.
  • the above display device further includes a light source module and a back plate;
  • the light source module includes a light emitting unit disposed adjacent to the light incident surface and a circuit board supporting the light emitting unit;
  • the back plate is disposed at the bottom of the light guide plate .
  • a surface of the back plate facing the light guide plate is a mirror-finished surface.
  • air bubbles are formed in the body of the light guide plate provided in the embodiment of the present application, and the air bubbles can be provided to reduce the weight of the light guide plate without reducing the thickness of the light guide plate.
  • the thickness of the light guide plate is unchanged, and most of the light emitted by the light emitting unit can still enter the light guide plate, and air bubbles are set in the body of the light guide plate.
  • the weight of the light guide plate can be reduced without reducing the thickness of the light guide plate.
  • the air bubbles can destroy the total reflection of light in the body, and produce an atomized light exit effect, so that more light is emitted uniformly from the light exit surface on the top of the light guide plate.
  • the display device provided in the embodiment of the present application has a light weight product, which meets the requirements for reducing the weight of the display device.
  • the air bubbles in the light guide plate have the effect of atomizing light, so that the light emitting surface forms a relatively atomized light source, which improves the uniform display effect.
  • FIG. 1 is a schematic diagram of a display device in an exemplary embodiment of the present application.
  • FIG. 2 is a schematic diagram of a display device in another exemplary embodiment of the present application.
  • FIG. 3 is a schematic diagram of a display device in another exemplary embodiment of the present application.
  • FIG. 4 is a schematic diagram of a display device in another exemplary embodiment of the present application.
  • FIG. 5 is a schematic diagram of a display device in still another exemplary embodiment of the present application.
  • FIG. 6 is a schematic diagram of a light guide plate in the display device of FIG. 5;
  • FIG. 7 is a schematic diagram of a display device in another exemplary embodiment of the present application.
  • FIG. 8 is a schematic diagram of a light guide plate in the display device of FIG. 7.
  • the display device in the embodiment of the present application may be a liquid crystal display panel, an OLED (Organic Light Emitting Diode) display device, a QLED (Quantum Light Emitting Diode) display device, a curved display device, or other display devices. .
  • OLED Organic Light Emitting Diode
  • QLED Quadantum Light Emitting Diode
  • the display device 100a includes a light source module 10a, a back plate 20a, and a light guide plate 30a.
  • the light guide plate 30a includes a main body 31a, a light incident surface 32a on the side of the main body 31a, a light exit surface 33a on the top of the main body 32a, and a reflective surface 34a on the bottom of the main body 31a opposite to the light exit surface 33a, and reflects in one embodiment
  • the surface 34a is provided with a plurality of halftone dots or a reflective sheet is bonded to the surface.
  • the light incident surface 32a may be located on only one side of the main body 31a, or may be symmetrically distributed on opposite sides of the main body 31a, or even on the sides of the main body 31a.
  • the light source module 10a includes a light emitting unit 11a disposed adjacent to the light incident surface 32a of the light guide plate, and a circuit board 12a supporting the light emitting unit 11a.
  • the back plate 20a is disposed at the bottom of the light guide plate 30a.
  • the surface of the back plate 20a facing the light guide plate 30a is mirror-finished to reflect the light emitted from the reflective surface 34a onto the back plate 20a onto the light exit surface 33a of the light guide plate 30a.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • air bubbles 311a are formed in the body 31a of the light guide plate 30a.
  • the arrangement of the air bubbles 311a can reduce the weight of the light guide plate 30a without reducing the thickness of the light guide plate 30a.
  • the thickness of the light guide plate 30a is unchanged, and most of the light emitted by the light emitting unit 11a can still enter the light guide plate 30a.
  • the air bubble 311a is disposed in the body 31a, and the structural strength of the light guide plate 30a will not be greatly reduced.
  • the bubble 311a can destroy the total reflection of the light in the body 31a, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33a on the top of the light guide plate 30a.
  • the weight of the display device 100a using the light guide plate 30a is also effectively reduced.
  • the body 31a shown in FIG. 1 may include a plurality of uniformly distributed air bubbles 311a.
  • the diameter of the air bubbles 311a in the main body 31a ranges from 0.1 mm to 2 mm, and can be specifically set according to the thickness of the light guide plate 30a and the weight to be reduced. For example, when the thickness of the light guide plate 30a is 4mm, the diameter of the bubble 311a may be 0.5mm; when the thickness of the light guide plate 30a is 6mm, the diameter of the bubble 311a may be 0.8mm; when the thickness of the light guide plate 30a is 9mm, the diameter of the bubble 311a may be It's 1.5mm.
  • the space occupied by the bubble 311a in the body 31a greatly affects the weight of the light guide plate 30a.
  • the total volume of the bubble 311a can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311a can be It is large, but in order to ensure that the light guide plate 30a has a certain strength, the total volume of the bubbles 311a should not be too large.
  • the volume ratio of the bubbles 311a to the body 31a ranges from 1: 9 to 4: 6.
  • the volume ratio of the bubbles 311a to the body 31a may be 2: 8; when a large weight reduction is required, the volume ratio of the bubbles 311a to the body 31a may be 3: 7.
  • the material of the light guide plate 30a is preferably a polymer material such as PMMA (Polymethylmethacrylate, polymethyl methacrylate) or transparent PC (Polycarbonate, polycarbonate), so that the foaming agent and the The polymer materials are uniformly mixed to form uniformly distributed air bubbles 311a in the body 31a of the light guide plate 30a.
  • PMMA Polymethylmethacrylate, polymethyl methacrylate
  • transparent PC Polycarbonate, polycarbonate
  • the display device 100 b includes a light source module 10 b, a back plate 20 b, and a light guide plate 30 b.
  • the light guide plate 30b includes a main body 31b, a light incident surface 32b on the side of the main body 31b, a light exit surface 33b on the top of the main body 32b, and a reflective surface 34b on the bottom of the main body 31b and opposite to the light exit surface 33b.
  • the light incident surface 32b may be located only on one side of the body 31b, or may be symmetrically distributed on opposite sides of the body 31b, or even on the sides of the body 31b.
  • the light source module 10b includes a light emitting unit 11b disposed adjacent to the light incident surface 32b of the light guide plate 30b, and a circuit board 12b supporting the light emitting unit 11b.
  • the back plate 20b is disposed at the bottom of the light guide plate 30b.
  • the surface of the back plate 20b facing the light guide plate 30b is treated as a mirror to reflect the light emitted from the reflective surface 34b onto the back plate 20b onto the light exit surface 33b of the light guide plate 30b.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • air bubbles 311b are formed in the body 31b of the light guide plate 30b.
  • the arrangement of the air bubbles 311b can reduce the weight of the light guide plate 30b without reducing the thickness of the light guide plate 30b.
  • the thickness of the light guide plate 30b is unchanged, most of the light emitted by the light emitting unit 11b can still enter the light guide plate 30b, and the air bubble 311b is disposed in the body, and the structural strength of the light guide plate 30b will not be greatly reduced.
  • the bubble 311b can destroy the total reflection of the light in the body 31b, and generate a fogged light output effect, so that more light is uniformly emitted from the light output surface 33b on the top of the light guide plate 30b.
  • the weight of the display device 100b using the light guide plate 30b is also effectively reduced.
  • the body 31b may include a bubble 311b, that is, the light guide plate 30b forms a hollow structure.
  • the air bubble 311b may be circular or rectangular and disposed at the center of the body 31b.
  • the length of the light guide plate 30b is 400mm and the width is 300mm.
  • the diameter of the circle can be 50mm to 100mm, such as 80mm.
  • the bubble 311b is rectangular, the length of the rectangular bubble 311b can be 80mm, width is 60mm.
  • the center line of the bubble 311b may be disposed between the reflective surface 34b and the light emitting surface 33b in the center, or may be offset in the direction of the reflective surface 34b.
  • the thickness of the bubble is 0.1mm to 3mm, which is determined according to the thickness of the light guide plate 30b.
  • the bubble 311b provided between the reflecting surface 34b and the light emitting surface 33b should be kept at a distance from the reflecting surface 34b and the light emitting surface 33b so that The light guide plate 30b still has sufficient strength.
  • the thickness of the bubble 311b is 0.5 mm to 2 mm, for example, 1 mm.
  • the material of the light guide plate 30b is preferably a polymer material such as PMMA or transparent PC.
  • the display device 100 c includes a light source module 10 c, a back plate 20 c, a light guide plate 30 c, and an optical film group.
  • the light guide plate 30c includes a main body 31c, a light incident surface 32c on the side of the main body 31c, a light exit surface 33c on the top of the main body 32c, and a reflective surface 34c located on the bottom of the main body 31c and opposite to the light exit surface 33c.
  • the light incident surface 32c may be located only on one side of the main body 31c, or may be symmetrically distributed on both sides of the main body 31c, or even on the sides of the main body 31c.
  • the light source module 10c includes a light emitting unit 11c disposed adjacent to the light incident surface 32c of the light guide plate 30c and a circuit board 12c supporting the light emitting unit 11c.
  • the light emitting unit 11c is an LED
  • the corresponding light source module 10c is an LED light bar.
  • the back plate 20c is disposed at the bottom of the light guide plate 30c.
  • the surface of the back plate 20c facing the light guide plate 30c is mirror-finished to reflect the light emitted from the reflective surface 34c onto the back plate 20c onto the light exit surface 33c of the light guide plate 30c.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • the optical film group (not labeled in FIG. 3) is located above the light exit surface 33 c of the light guide plate 30 c, and includes, for example, an optical film such as a diffusion sheet.
  • air bubbles 311c are formed in the body 31c of the light guide plate 30c.
  • the arrangement of the air bubbles 311c can reduce the weight of the light guide plate 30c without reducing the thickness of the light guide plate 30c.
  • the thickness of the light guide plate 30c does not change. Most of the light emitted by the light emitting unit 11c can still enter the light guide plate 30c.
  • the air bubble 311c is disposed in the body, and the structural strength of the light guide plate 30c will not be greatly reduced.
  • the bubble 311c can destroy the total reflection of the light in the body 31c, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33c on the top of the light guide plate 30c.
  • the weight of the display device 100c using the light guide plate 30c is also effectively reduced.
  • the bubbles 311c are located on a layer between the light emitting surface 33c and the reflecting surface 34c, and the plurality of bubbles 311c are generally located on the same plane, which is parallel to the reflecting surface 34c and the light emitting surface 33c and is away from the reflecting surface 34c.
  • the bubble 311c is disposed near the reflecting surface 34c, so that the light totally reflected in the body 31c is scattered by the bubble 311c and exits from the light emitting surface 33c when it approaches the reflecting surface 34c, thereby improving the light flux on the light emitting surface 33c.
  • the diameter of the air bubble 311c in the body 31c ranges from 0.3 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30c and the weight to be reduced. For example, when the thickness of the light guide plate 30c is 5mm, the diameter of the bubble 311c may be 0.4mm; when the thickness of the light guide plate 30c is 6mm, the diameter of the bubble 311c may be 1.0mm; when the thickness of the light guide plate 30c is 10mm, the diameter of the bubble 311c may be It is 1.3mm.
  • the space occupied by the bubble 311c in the body 31c greatly affects the weight of the light guide plate 30c.
  • the total volume of the bubble 311c can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311c can be It is large, but in order to ensure that the light guide plate 30c has a certain strength, the total volume of the bubble 311c should not be too large.
  • the volume ratio of the bubbles 311c to the body 31c ranges from 1: 9 to 3: 7.
  • the volume ratio of the bubble 311c to the body 31c may be 1: 9; when a large weight reduction is required, the volume ratio of the bubble 311c to the body 31c may be 2: 8.
  • the material of the light guide plate 30c is preferably a polymer material such as PMMA or transparent PC.
  • the display device 100 d includes a light source module 10 d, a back plate 20 d, a light guide plate 30 d, and an optical film group.
  • the light guide plate 30d includes a main body 31d, a light incident surface 32d on the side of the main body 31d, a light exit surface 33d on the top of the main body 32d, and a reflective surface 34d on the bottom of the main body 31d and opposite to the light exit surface 33d.
  • the light incident surface 32d may be located on only one side of the body 31d, or may be symmetrically distributed on both sides of the body 31d, or even on the sides of the body 31d.
  • the light source module 10d includes a light emitting unit 11d disposed adjacent to the light incident surface 32d of the light guide plate 30d, and a circuit board 12d supporting the light emitting unit 11d.
  • the back plate 20d is disposed at the bottom of the light guide plate 30d.
  • the surface of the back plate 20d facing the light guide plate 30d is mirror-finished to reflect the light emitted from the reflective surface 34d onto the back plate 20d to the light exit surface 33d of the light guide plate 30d.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • the optical film group (not shown in FIG. 4) is located above the light emitting surface 33 d of the light guide plate 30 d, and includes, for example, an optical film such as a diffusion sheet.
  • air bubbles 311d are formed in the body 31d of the light guide plate 30d.
  • the arrangement of the air bubbles 311d can reduce the weight of the light guide plate 30d without reducing the thickness of the light guide plate 30d.
  • the thickness of the light guide plate 30d is unchanged, most of the light emitted by the light emitting unit 11d can still enter the light guide plate 30d, and the air bubble 311d is disposed in the body, and the structural strength of the light guide plate 30d will not be greatly reduced.
  • the bubble 311d can destroy the total reflection of the light in the body 31d, and produce a fogged light output effect, so that more light is uniformly emitted from the light output surface 33d on the top of the light guide plate 30d.
  • the weight of the display device 100d using the light guide plate 30d is also effectively reduced.
  • the bubbles 311d are located on two layers between the light emitting surface 33d and the reflecting surface 34d, and the plurality of bubbles 311d are located on two mutually parallel planes, and the two mutually parallel planes are parallel to the reflecting surface 34d and the light emitting surface 33d. And the two planes which are parallel to each other are close to the reflecting surface 34d and away from the light emitting surface 33d as a whole.
  • the bubble 311d is disposed near the reflecting surface 34d, so that the light totally reflected in the body 31d is scattered by the bubble 311d and exits from the light emitting surface 33d when approaching the reflecting surface 34d, thereby improving the light flux on the light emitting surface 33d.
  • the diameter of the air bubble 311d in the body 31d ranges from 0.1 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30d and the weight to be reduced. For example, when the thickness of the light guide plate 30d is 5mm, the diameter of the bubble 311d may be 0.5mm; when the thickness of the light guide plate 30d is 6mm, the diameter of the bubble 311d may be 1.0mm; when the thickness of the light guide plate 30d is 10mm, the diameter of the bubble 311d may be It is 1.2mm.
  • the space occupied by the bubble 311d in the body 31d greatly affects the weight of the light guide plate 30d.
  • the ratio of the volume of the bubbles 311d to the volume of the body 31d ranges from 1: 9 to 4: 6.
  • the volume ratio of the bubble 311d to the body 31d may be 1: 9; when a large weight reduction is required, the volume ratio of the bubble 311d to the body 31d may be 2: 8.
  • the material of the light guide plate 30d is preferably a polymer material such as PMMA or transparent PC.
  • the display device 100 e includes a light source module 10 e, a back plate 20 e, a light guide plate 30 e, and an optical film group.
  • the light guide plate 30e includes a main body 31e, a light incident surface 32e on the side of the main body 31e, a light exit surface 33e on the top of the main body 32e, and a reflective surface 34e on the bottom of the main body 31e and opposite to the light exit surface 33e.
  • the light incident surface 32e may be located on only one side of the body 31e, or may be symmetrically distributed on both sides of the body 31e, or even on the sides of the body 31e.
  • the light source module 10e includes a light emitting unit 11e disposed adjacent to the light incident surface 32e of the light guide plate 30e and a circuit board 12e supporting the light emitting unit 11e.
  • the back plate 20e is disposed at the bottom of the light guide plate 30e.
  • the surface of the back plate 20e facing the light guide plate 30e is mirror-finished to reflect the light emitted from the reflective surface 34e onto the back plate 20e onto the light exit surface 33e of the light guide plate 30e.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • the optical film group (not labeled in FIG. 5) is located above the light emitting surface 33 e of the light guide plate 30 e, and includes, for example, an optical film such as a diffusion sheet.
  • air bubbles 311e are formed in the body 31e of the light guide plate 30e.
  • the arrangement of the air bubbles 311e can reduce the weight of the light guide plate 30e without reducing the thickness of the light guide plate 30e.
  • the thickness of the light guide plate 30e does not change, most of the light emitted by the light emitting unit 11e can still enter the light guide plate 30e, and the air bubble 311e is set in the body, which will not greatly reduce the structural strength of the light guide plate 30e.
  • the bubble 311e can destroy the total reflection of the light in the body 31e, and generate a fogged light output effect, so that more light is uniformly emitted from the light output surface 33e on the top of the light guide plate 30e.
  • the weight of the display device 100e using the light guide plate 30e is also effectively reduced.
  • the body 31e includes a central area 312e and a peripheral area 313e surrounding the central area 312e.
  • the thickness of the light guide plate 30e is small, and the number of air bubbles 311e on the body 31e will greatly reduce the light guide plate 30e.
  • the bubbles 311e of the peripheral region 313e may be denser than the bubbles 311e of the central region 312e, so that the central region 312e has a higher intensity than the peripheral region 313e.
  • the central area 312e may be a symmetrical figure or a special figure, and the symmetrical figure is, for example, a circle or a rectangle. In this embodiment, the central area 312e is rectangular.
  • the diameter of the air bubble 311e in the main body 31e ranges from 0.1 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30e and the weight to be reduced. For example, when the thickness of the light guide plate 30e is 5mm, the diameter of the bubble 311e may be 0.5mm; when the thickness of the light guide plate 30e is 6mm, the diameter of the bubble 311e may be 1.0mm; when the thickness of the light guide plate 30e is 10mm, the diameter of the bubble 311e may be It is 1.2mm.
  • the space occupied by the bubble 311e in the body 31e greatly affects the weight of the light guide plate 30e.
  • the total volume of the bubble 311e can be relatively small; when the weight to be reduced is large, the total volume of the bubble 311e can be It is large, but in order to ensure that the light guide plate 30e has a certain strength, the total volume of the bubble 311e should not be too large.
  • the volume ratio of the bubbles 311e to the body 31e ranges from 1: 9 to 4: 6.
  • the bubble volume ratio of the central region 312e may be 1: 9
  • the bubble volume ratio of the peripheral region 313e may be 3: 7.
  • the bubble volume ratio of the central region 312e may be 1: 9, and the bubble volume ratio of the peripheral region 313e may be 2: 8; when substantial weight reduction is required, the bubble volume of the central region 312e may be The ratio may be 2: 8, and the ratio of the bubble volume in the peripheral region 313e may be 3: 7.
  • the air bubble 311e is located in the body 31e, and the air bubble 311 maintains a distance from the light incident surface 32e, and the distance dimension is 2 to 10 mm, for example, 5 mm.
  • the air bubble 311e is formed in the body 31e of the light guide plate 30e, the light guide plate 30e is lightened without reducing the thickness of the light guide plate 30e and the intensity of the light guide plate 30e.
  • the display device 100e including the light guide plate 30e is also made lighter.
  • the bubbles 311e can be used as a scattering structure to scatter light.
  • the material of the light guide plate 30e is preferably a polymer material such as PMMA or transparent PC.
  • the display device 100 f includes a light source module 10 f, a back plate 20 f, a light guide plate 30 f, and an optical film group.
  • the light guide plate 30f includes a main body 31f, a light incident surface 32f on the side of the main body 31f, a light exit surface 33f on the top of the main body 32f, and a reflective surface 34f on the bottom of the main body 31f and opposite to the light exit surface 33f.
  • the light incident surface 32f may be located on only one side of the body 31f, or may be symmetrically distributed on both sides of the body 31f, or even on the sides of the body 31f.
  • the light source module 10f includes a light emitting unit 11f disposed adjacent to the light incident surface 32f of the light guide plate 30f and a circuit board 12f supporting the light emitting unit 11f.
  • the back plate 20f is disposed at the bottom of the light guide plate 30f.
  • the surface of the back plate 20f facing the light guide plate 30f is treated as a mirror surface, so as to reflect the light incident on the back plate 20f from the reflective surface 34f to the light exit surface 33f of the light guide plate 30f.
  • Mirror treatment means that the surface is smooth, and most of the light can be specularly reflected after incident on the surface.
  • the optical film group (not labeled in FIG. 7) is located above the light exit surface 33 f of the light guide plate 30 f, and includes, for example, an optical film such as a diffusion sheet.
  • air bubbles 311f are formed in the body 31f of the light guide plate 30f.
  • the arrangement of the air bubbles 311f can reduce the weight of the light guide plate 30f without reducing the thickness of the light guide plate 30f.
  • the thickness of the light guide plate 30f does not change. Most of the light emitted by the light emitting unit 11f can still enter the light guide plate 30f.
  • the air bubble 311f is disposed in the body, and the structural strength of the light guide plate 30f will not be greatly reduced.
  • the bubble 311f has a scattering function, which can destroy the total reflection of the light in the body 31f, and generate an atomized light emitting effect, so that more light is uniformly emitted from the light emitting surface 33f on the top of the light guide plate 30f.
  • the weight of the display device 100f using the light guide plate 30f is also effectively reduced.
  • the body 31f includes a central area 312f and a peripheral area 313f surrounding the central area 312f.
  • the thickness of the light guide plate 30f is small, and the number of air bubbles 311f on the body 31f will greatly reduce the light guide plate 30f.
  • the bubbles 311f of the peripheral region 313f may be denser than the bubbles 311f of the central region 312f, so that the central region 312f has a higher intensity than the peripheral region 313f.
  • the central area 312f may be a symmetrical figure or a special figure, such as a circle or a rectangle. In this embodiment, the central area 312f is circular.
  • the diameter of the air bubble 311f in the body 31f ranges from 0.2 mm to 1.5 mm, and can be specifically set according to the thickness of the light guide plate 30f and the weight to be reduced. For example, when the thickness of the light guide plate 30f is 5mm, the diameter of the bubble 311f may be 0.4mm; when the thickness of the light guide plate 30f is 6mm, the diameter of the bubble 311f may be 1.2mm; when the thickness of the light guide plate 30f is 10mm, the diameter of the bubble 311f may be It is 1.4mm.
  • the space occupied by the bubble 311f in the body 31f greatly affects the weight of the light guide plate 30f.
  • the ratio of the volume of the bubbles 311f to the volume of the body 31f ranges from 1: 9 to 4: 6.
  • the bubble volume ratio of the central region 312f may be 1: 9
  • the bubble volume ratio of the peripheral region 313f may be 3: 7.
  • the bubble volume ratio of the central area 312f may be 1: 9, and the bubble volume ratio of the peripheral area 313f may be 2: 8; when a substantial weight loss is required, the bubble volume of the central area 312f may be The ratio may be 2: 8, and the ratio of the bubble volume in the peripheral region 313f may be 3: 7.
  • the light guide plate 30f is lightened without reducing the thickness and the intensity of the light guide plate 30f.
  • the display device 100f including the light guide plate 30f is also made lighter.
  • the material of the light guide plate 30f is preferably a polymer material such as PMMA or transparent PC.
  • the display devices 100a-100f in the foregoing embodiments also include: Structures known to those skilled in the art such as plastic frames, front frames, panels, etc. may be included.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne une plaque de guidage de lumière (30a), comprenant un corps principal (31a), une surface d'entrée de lumière (32a) située au niveau d'une partie latérale du corps principal (31a), et une surface de sortie de lumière (33a) située au niveau d'une partie supérieure du corps principal (31a). Des bulles (311a) sont formées dans le corps principal (31a). L'invention concerne aussi un dispositif d'affichage comprenant ladite plaque de guidage de lumière. La fourniture de bulles peut réduire le poids de la plaque de guidage de lumière et perturber la réflexion interne totale de la lumière, produisant un effet d'émission de lumière atténué, de sorte que la lumière puisse être émise uniformément.
PCT/CN2019/082293 2018-07-17 2019-04-11 Plaque de guidage de lumière et dispositif d'affichage WO2020015399A1 (fr)

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CN201810786441.7A CN108594358A (zh) 2018-07-17 2018-07-17 导光板和显示装置
CN201810786441.7 2018-07-17

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WO2020015399A1 true WO2020015399A1 (fr) 2020-01-23

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Publication number Priority date Publication date Assignee Title
CN108594358A (zh) * 2018-07-17 2018-09-28 惠科股份有限公司 导光板和显示装置
CN209311728U (zh) * 2018-07-17 2019-08-27 惠科股份有限公司 导光板和显示装置
CN113531409A (zh) * 2021-08-27 2021-10-22 松山湖材料实验室 照明装置
CN115128716B (zh) * 2022-05-25 2024-01-02 广东瑞捷新材料股份有限公司 一种新型发泡扩散板结构

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CN205299407U (zh) * 2016-01-18 2016-06-08 潍坊星美电子科技有限公司 Led透镜高混光导光板
CN108267810A (zh) * 2018-03-02 2018-07-10 深圳创维－Rgb电子有限公司 一种导光板、背光模组及显示设备
CN108594358A (zh) * 2018-07-17 2018-09-28 惠科股份有限公司 导光板和显示装置
CN108873152A (zh) * 2018-07-17 2018-11-23 惠科股份有限公司 导光板的制作方法和显示装置的制作方法

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JPH0694923A (ja) * 1991-07-25 1994-04-08 Ono Gijutsu Kenkyusho:Kk 薄型ライトボックス
CN101117014A (zh) * 2006-07-31 2008-02-06 三星电子株式会社 光学板模具及其制造方法和光学板及其制造方法
CN205299407U (zh) * 2016-01-18 2016-06-08 潍坊星美电子科技有限公司 Led透镜高混光导光板
CN108267810A (zh) * 2018-03-02 2018-07-10 深圳创维－Rgb电子有限公司 一种导光板、背光模组及显示设备
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CN108873152A (zh) * 2018-07-17 2018-11-23 惠科股份有限公司 导光板的制作方法和显示装置的制作方法

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