WO2016138677A1 - Unité de rétroéclairage et sa plaque de guidage de lumière - Google Patents

Unité de rétroéclairage et sa plaque de guidage de lumière Download PDF

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Publication number
WO2016138677A1
WO2016138677A1 PCT/CN2015/074387 CN2015074387W WO2016138677A1 WO 2016138677 A1 WO2016138677 A1 WO 2016138677A1 CN 2015074387 W CN2015074387 W CN 2015074387W WO 2016138677 A1 WO2016138677 A1 WO 2016138677A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
prism
prisms
light guide
Prior art date
Application number
PCT/CN2015/074387
Other languages
English (en)
Chinese (zh)
Inventor
张简圣哲
樊勇
Original Assignee
深圳市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 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Publication of WO2016138677A1 publication Critical patent/WO2016138677A1/fr

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Classifications

    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide

Definitions

  • the invention relates to the technical field of liquid crystal displays, in particular to an improved structure of a light guide plate.
  • the design of the backlight module if the single long side enters the light, due to the limitation of the current brightness and heat dissipation of the LED single lamp, coupled with the low transmittance of the large-size high-definition liquid crystal panel, the single Long design, when the brightness does not reach the brightness of the design, it is usually the choice of double short or double long side light.
  • the coupling between the LED and the light guide plate is generally increased.
  • Light distance to reduce the risk of warping and the risk of hitting the light As the coupling distance increases, the coupling efficiency of light entering the light guide plate is greatly reduced.
  • a low reflectivity material is usually added above the coupling region to reduce light leakage. The risk of such coupling light is further reduced.
  • the present invention provides a light guide plate for a backlight module, comprising a first light incident side and a second light incident side having a width smaller than the first light incident side, the first input
  • the light side and the second light incident side respectively introduce a first incident light and a second incident light by a corresponding light source, and the surface of the light guide plate is arranged with a plurality of first prisms having a trapezoidal or triangular or semicircular cross section.
  • a prism a prism; a long axis of the first prism is perpendicular to the first incident light, a long axis of the second prism is perpendicular to a direction of the second incident light; and between the first prism and the second prism There is a gap between them.
  • the apex angle of the triangle is a right angle.
  • an angle between the first light incident side and the second light incident side is a right angle.
  • the second prism is interposed between the two rows of first prisms.
  • the present invention also provides a backlight module including the above-mentioned light guide plate and a light source, that is, the light guide plate includes a first light incident side and a second light incident side having a width smaller than the first light incident side, The first light incident side and the second light incident side respectively introduce a first incident light and a second incident light from the corresponding light source, wherein the surface of the light guide plate is arranged with a plurality of cross sections that are trapezoidal or triangular or semicircular a first prism, a second prism; a long axis of the first prism is perpendicular to the first incident light, and a major axis of the second prism is perpendicular to the second incident light direction; There is a gap between the second prism.
  • the apex angle of the cross section is a right angle.
  • an angle between the first light incident side and the second light incident side is a right angle.
  • the second prism is interposed between the two rows of first prisms.
  • the invention relates to a light guide plate applied to a backlight module with short-side and long-side mixed light, wherein a plurality of prism structures are arranged on the surface of the light guide plate, which can improve the light-emitting efficiency of the light guide plate, improve the brightness of the backlight, and can be matched with the light guide plate.
  • the bottom mesh improves the brightness uniformity of the backlight and improves the viewing angle.
  • FIG. 1 is a schematic top plan view of a light guide plate according to an embodiment of the invention.
  • FIG. 2 is a schematic view of a prism structure of the present invention.
  • FIG. 3 is a schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • the present invention proposes a special microstructure design of the light exit surface of the light guide plate.
  • the present invention provides a light guide plate 10 for a backlight module, including a first light incident side. 11 and a second light incident side 12 having a width smaller than the first light incident side 11. That is, the first light incident side 11 is the long side of the light guide plate 10, and the second light incident side 12 is the short side of the light guide plate 10.
  • a light source (not shown in FIG. 1) is distributed on the second light incident side 12 (short side, not restricting the left and right direction) and the first light incident side 11 (long side, not limited to the heaven and earth side).
  • the first light incident side 11 and the second light incident side 12 respectively introduce first incident light (perpendicular to the first light incident side 11) and second incident light (perpendicular to the second input) by corresponding light sources.
  • Light side 12 ).
  • the upper surface of the light guide plate 10 is arranged with a plurality of prisms 20 having a triangular cross section (as shown in FIG. 2), and can be divided into first prisms 21 and second according to different positions and orientations of the prisms 20 Prism 22.
  • first prism 21 and the second prism 22 are the same, and both of them have a triangular cross section.
  • the apex angle of the cross section is a right angle, and the other two inner corners are not particularly limited.
  • the long axis of the first prism 21 is perpendicular to the first incident light
  • the long axis of the second prism 22 is perpendicular to the second incident light direction.
  • the first incident light and the second incident light are perpendicular to the first light incident side 11 and the second light incident side 12, respectively, so that the first prism and the second prism are respectively associated with the first The light incident side 11 and the second light incident side 12 are parallel.
  • the first prisms 21 are sequentially arranged in parallel with the first light incident side 11, and there is a gap between the first prisms 21 in the same row, that is, the first prisms are intermittent rows in one row. Cloth.
  • the second prism 22 is interposed between the two rows of first prisms 21, and has a similar discontinuous arrangement.
  • the number of the first prisms in a row does not need to be particularly limited, and can be set in accordance with the size of the prism produced by the production process.
  • the prism can be conveniently disposed on the upper surface of the light guide plate 10 by bonding or the like.
  • the lower surface of the light guide plate is provided with a scattering dot (not shown), which may be printed by ink or by hot stamping or rolling.
  • the prism arrangement method can make the light out of the light guide plate more uniform, and greatly improve the light extraction efficiency of the light guide plate, improve the brightness of the backlight, and the design of the scattering dot on the lower surface of the light guide plate can significantly improve the brightness, uniformity and vision of the backlight. effect.
  • the structure of the prism may also be various.
  • the cross section of the prism may also be trapezoidal or semi-circular; even according to the illumination direction of the light source, the prism may be adjusted accordingly, for example, the first
  • the prisms may be arranged in parallel parallel to the diagonal direction of the light guide plate, and the object of the present invention can be achieved.
  • the present invention also provides a backlight module assembled by using the above-mentioned light guide plate.
  • the backlight module 50 includes the light guide plate 10 (the prism structure is not shown), and is disposed on the light incident side of the light guide plate 10 .
  • the quality of the backlight module can be greatly improved by the improvement of the structure of the light guide plate.

Abstract

L'invention concerne une plaque de guidage de lumière (10) utilisée pour une unité de rétroéclairage, comprenant un premier côté entrée lumineuse (11) et un second côté entrée lumineuse (12) dont la largeur est plus petite que celle du premier côté entrée lumineuse (11), une première lumière incidente et une seconde lumière incidente sont séparément importées sur le premier côté entrée lumineuse (11) et le second côté entrée lumineuse (12) par des sources de lumière correspondantes, et plusieurs premiers prismes (21) et de seconds prismes (22) dont les sections transversales sont de forme trapézoïdale ou triangulaire ou semi-circulaire sont disposés en réseau sur la surface supérieure de la plaque de guidage de lumière (10) ; les axes longs des premiers prismes (21) sont verticaux par rapport à la première lumière incidente, et les axes longs des seconds prismes (22) sont verticaux par rapport à la seconde lumière incidente ; et un espace existe entre les premiers prismes (21) et entre les seconds prismes (22). L'efficacité d'émission de lumière de la plaque de guidage de lumière est améliorée, la luminosité du rétroéclairage est augmentée, et en même temps, en combinaison avec des points de grille de la surface inférieure de la plaque de guidage de lumière, le rapport d'uniformité de la luminosité du rétroéclairage et d'un angle visuel peut être amélioré.
PCT/CN2015/074387 2015-03-02 2015-03-17 Unité de rétroéclairage et sa plaque de guidage de lumière WO2016138677A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510092207.0A CN104614802B (zh) 2015-03-02 2015-03-02 一种背光模组及其导光板
CN201510092207.0 2015-03-02

Publications (1)

Publication Number Publication Date
WO2016138677A1 true WO2016138677A1 (fr) 2016-09-09

Family

ID=53149331

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/074387 WO2016138677A1 (fr) 2015-03-02 2015-03-17 Unité de rétroéclairage et sa plaque de guidage de lumière

Country Status (2)

Country Link
CN (1) CN104614802B (fr)
WO (1) WO2016138677A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6474827B2 (en) * 1995-10-13 2002-11-05 Omron Corporation Image display apparatus
CN2791690Y (zh) * 2005-04-09 2006-06-28 群康科技(深圳)有限公司 导光板和背光模组
CN1967341A (zh) * 2005-11-18 2007-05-23 鸿富锦精密工业（深圳）有限公司 导光板
TW200720771A (en) * 2005-11-18 2007-06-01 Hon Hai Prec Ind Co Ltd Light guiding plate
JP2009134883A (ja) * 2007-11-28 2009-06-18 Nippon Leiz Co Ltd 導光板および平面照明装置
US8033706B1 (en) * 2004-09-09 2011-10-11 Fusion Optix, Inc. Lightguide comprising a low refractive index region
CN202256962U (zh) * 2011-09-13 2012-05-30 汕头市锐科电子有限公司 一种液晶显示器
US20120287669A1 (en) * 2010-01-13 2012-11-15 Sharp Kabushiki Kaisha Backlight, and display having a backlight

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7478942B2 (en) * 2003-01-23 2009-01-20 Samsung Electronics Co., Ltd. Light guide plate with light reflection pattern
CN100363803C (zh) * 2004-12-03 2008-01-23 鸿富锦精密工业（深圳）有限公司 导光板及背光模组
CN102301272B (zh) * 2008-12-18 2015-06-24 3M创新有限公司 具有增强的光提取的光导

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6474827B2 (en) * 1995-10-13 2002-11-05 Omron Corporation Image display apparatus
US8033706B1 (en) * 2004-09-09 2011-10-11 Fusion Optix, Inc. Lightguide comprising a low refractive index region
CN2791690Y (zh) * 2005-04-09 2006-06-28 群康科技(深圳)有限公司 导光板和背光模组
CN1967341A (zh) * 2005-11-18 2007-05-23 鸿富锦精密工业（深圳）有限公司 导光板
TW200720771A (en) * 2005-11-18 2007-06-01 Hon Hai Prec Ind Co Ltd Light guiding plate
JP2009134883A (ja) * 2007-11-28 2009-06-18 Nippon Leiz Co Ltd 導光板および平面照明装置
US20120287669A1 (en) * 2010-01-13 2012-11-15 Sharp Kabushiki Kaisha Backlight, and display having a backlight
CN202256962U (zh) * 2011-09-13 2012-05-30 汕头市锐科电子有限公司 一种液晶显示器

Also Published As

Publication number Publication date
CN104614802A (zh) 2015-05-13
CN104614802B (zh) 2018-03-20

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