WO2020187282A1 - Plaque réfléchissante dirigeant la lumière, module de rétroécairage et dispositif d'affichage - Google Patents

Plaque réfléchissante dirigeant la lumière, module de rétroécairage et dispositif d'affichage Download PDF

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Publication number
WO2020187282A1
WO2020187282A1 PCT/CN2020/080128 CN2020080128W WO2020187282A1 WO 2020187282 A1 WO2020187282 A1 WO 2020187282A1 CN 2020080128 W CN2020080128 W CN 2020080128W WO 2020187282 A1 WO2020187282 A1 WO 2020187282A1
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WO
WIPO (PCT)
Prior art keywords
reflective
light guiding
guiding properties
reflective sheet
light
Prior art date
Application number
PCT/CN2020/080128
Other languages
English (en)
Chinese (zh)
Inventor
潘杰华
闫延超
胡萌萌
Original Assignee
深圳Tcl新技术有限公司
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Tcl新技术有限公司 filed Critical 深圳Tcl新技术有限公司
Publication of WO2020187282A1 publication Critical patent/WO2020187282A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Definitions

  • the present disclosure relates to the field of backlight modules, and in particular to a reflective sheet, backlight module and display device with light guiding properties.
  • the backlight module in the display module includes a light bar, a reflector, a light guide plate, a diffuser, a brightness enhancement film, a diffuser, etc.
  • the main function of the reflector is to reflect light and improve light utilization.
  • the traditionally used reflective sheet is coated with reflective particles 2 on the surface of the substrate 1 to form an irregular structure.
  • Figure 1 (top view) and Figure 2 (cross-sectional view) show the structure and distribution of the reflective particles 2 of the coating layer.
  • the structure has a divergent diffuse reflection effect on light. The direction of light reflection is random and non-guided.
  • the purpose of the present disclosure is to provide a reflective sheet, backlight module and display device with light guiding properties, which aims to solve the problem that the direction of light reflected by the existing reflective sheet is random and non-directed. Type of problem.
  • a reflective sheet with light guiding properties includes a substrate and reflective particles, and further includes a reflective surface arranged periodically, the reflective surface is arranged on the substrate, and the reflective particles are distributed on the reflective surface.
  • the reflective surface is formed by parallel arrangement of protrusions with a triangular cross section, and the inclined surface of the protrusions is the reflective surface.
  • the top corners of the protrusions are rounded.
  • the base angle of the triangular protrusion is an acute angle.
  • one side in the longitudinal direction of the reflective surface is in contact with the base.
  • the included angle between two adjacent triangular protrusions is an acute angle.
  • the heights of the triangular protrusions are equal.
  • the reflective sheet with light guiding properties wherein the substrate is a PET substrate.
  • the reflective sheet with light guiding properties wherein a resin layer is provided between the substrate and the reflective particles.
  • the reflective surface is prepared by molding.
  • the reflective surface is formed by parallel arrangement of grooves with a "concave" cross-section, and the side walls of the grooves are reflective surfaces.
  • the depths of the "concave"-shaped grooves are equal.
  • the opening widths of the "concave"-shaped grooves are equal.
  • a backlight module adopts the above-mentioned reflective sheet with light guiding properties as a reflective film.
  • a display device includes the above-mentioned backlight module.
  • the present disclosure provides a reflective sheet with light guiding properties as described above.
  • reflective particles are arranged on a reflective surface that is periodically arranged.
  • the structure has certain guiding properties for light and can increase light.
  • the number of transmissions in a specific direction greatly improves the brightness of the light in that direction, and achieves the effect of large-distance transmission, which can meet the needs of reducing the number of LEDs and increasing the gap between the light bars, and thus reduce the number of lights.
  • Figure 1 is a distribution diagram of reflective particles on the surface of a reflective sheet in the prior art.
  • Figure 2 is a cross-sectional view of a prior art reflector.
  • FIG 3 is a cross-sectional view of an embodiment of the reflective sheet with light guiding properties of the present disclosure.
  • FIG. 4 is a distribution diagram of reflective particles on the surface of the reflective sheet of the present disclosure.
  • Fig. 5 is a perspective view (partial view) of the reflective surface of the reflective sheet of the present disclosure.
  • FIG. 6 is a cross-sectional view of another embodiment of the reflective sheet with light guiding properties of the present disclosure.
  • the present disclosure provides a reflective sheet, a backlight module, and a display device with light guiding properties.
  • a reflective sheet a backlight module
  • a display device with light guiding properties.
  • the present disclosure provides a preferred embodiment of a reflective sheet with light guiding properties, as shown in Figures 3 and 4, comprising a substrate 1, reflective particles 2 and a reflective surface 3 arranged periodically.
  • the reflective surface 3 is arranged on On the substrate 1, the reflective particles 2 are distributed on the reflective surface 3.
  • the periodically arranged reflective surface 3 may be formed by parallel arrangement of protrusions with a triangular cross section.
  • the inclined surfaces of the protrusions reflect Function; the periodically arranged reflecting surface 3 can also be formed by parallel arrangement of grooves with a "concave" cross-section.
  • the groove walls are inclined surfaces to play a reflective role.
  • a layer of resin and reflective particles 2 can be sequentially coated on the PET substrate, and then molded through a mold to form the reflective surface 3 arranged periodically.
  • the periodically arranged reflective surfaces 3 have certain guiding properties for light in a specific direction, and can increase the amount of light propagating in a specific direction.
  • the top corners of the protrusions are preferably rounded corners, which can reduce the scratches of other components caused by the sharp corners of the reflective sheet, and also reduce the wear of the reflective sheet itself.
  • the reflective particles are arranged on the reflective surface arranged periodically, and the traditional diffuse reflection surface of the non-guided diffuser sheet is improved to the diffuse reflective surface arranged periodically, which can increase the amount of light propagating in a single direction.
  • the traditional diffuse reflection surface of the non-guided diffuser sheet is improved to the diffuse reflective surface arranged periodically, which can increase the amount of light propagating in a single direction.
  • the present disclosure also provides a backlight module.
  • the backlight module using the reflective sheet can reduce the number of LEDs used and reduce the cost.
  • the present disclosure also provides a display device.
  • the display device adopting the backlight module has low cost and is more competitive in the market.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne une plaque réfléchissante dirigeant la lumière, un module de rétroéclairage et un dispositif d'affichage, dans lesquels : une plaque réfléchissante dirigeant la lumière comprenant une base (1) et des particules réfléchissantes (2), et comprenant en outre une surface réfléchissante (3) disposée périodiquement, la surface réfléchissante (3) étant disposée sur la base (1), et les particules réfléchissantes (2) étant réparties sur la surface réfléchissante (3). La plaque réfléchissante a un certain effet de direction sur les rayons de lumière, et est capable d'augmenter le nombre de rayons de lumière transmis dans une direction spécifique, augmentant ainsi considérablement la luminosité optique dans ladite direction et atteignant l'effet de transmission à longue distance, ce qui permet de satisfaire les exigences de réduction d'un nombre de DEL et de faire en sorte que l'espacement entre les bandes de lampe soit de plus en plus supérieur, et donc de réduire le coût de la bande de lampe et d'augmenter la compétitivité du produit.
PCT/CN2020/080128 2019-03-20 2020-03-19 Plaque réfléchissante dirigeant la lumière, module de rétroécairage et dispositif d'affichage WO2020187282A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201920357987.0U CN209624814U (zh) 2019-03-20 2019-03-20 一种具有光导向性的反射片、背光模组及显示装置
CN201920357987.0 2019-03-20

Publications (1)

Publication Number Publication Date
WO2020187282A1 true WO2020187282A1 (fr) 2020-09-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/080128 WO2020187282A1 (fr) 2019-03-20 2020-03-19 Plaque réfléchissante dirigeant la lumière, module de rétroécairage et dispositif d'affichage

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Country Link
CN (1) CN209624814U (fr)
WO (1) WO2020187282A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209624814U (zh) * 2019-03-20 2019-11-12 深圳Tcl新技术有限公司 一种具有光导向性的反射片、背光模组及显示装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009139869A (ja) * 2007-12-10 2009-06-25 Mitsubishi Rayon Co Ltd 反射シート及び該反射シートの製造方法
CN103162186A (zh) * 2013-03-05 2013-06-19 福建省锐驰电子科技有限公司 一种背光模组
CN203350473U (zh) * 2013-07-10 2013-12-18 钟莉 一种反射膜、反射片或反射罩
CN207249152U (zh) * 2017-08-04 2018-04-17 惠州市凯帝智光电科技有限公司 高效节能的tv液晶模组专用反射片
CN207851340U (zh) * 2018-02-09 2018-09-11 宏丞光电(厦门)有限公司 一种反射片
CN209624814U (zh) * 2019-03-20 2019-11-12 深圳Tcl新技术有限公司 一种具有光导向性的反射片、背光模组及显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009139869A (ja) * 2007-12-10 2009-06-25 Mitsubishi Rayon Co Ltd 反射シート及び該反射シートの製造方法
CN103162186A (zh) * 2013-03-05 2013-06-19 福建省锐驰电子科技有限公司 一种背光模组
CN203350473U (zh) * 2013-07-10 2013-12-18 钟莉 一种反射膜、反射片或反射罩
CN207249152U (zh) * 2017-08-04 2018-04-17 惠州市凯帝智光电科技有限公司 高效节能的tv液晶模组专用反射片
CN207851340U (zh) * 2018-02-09 2018-09-11 宏丞光电(厦门)有限公司 一种反射片
CN209624814U (zh) * 2019-03-20 2019-11-12 深圳Tcl新技术有限公司 一种具有光导向性的反射片、背光模组及显示装置

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