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WO2016045201A2 - Plaque à guide lumineux et dispositif d'affichage à cristaux liquides - Google Patents

Plaque à guide lumineux et dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2016045201A2
WO2016045201A2 PCT/CN2014/093728 CN2014093728W WO2016045201A2 WO 2016045201 A2 WO2016045201 A2 WO 2016045201A2 CN 2014093728 W CN2014093728 W CN 2014093728W WO 2016045201 A2 WO2016045201 A2 WO 2016045201A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
guide plate
shape
light guide
liquid crystal
Prior art date
Application number
PCT/CN2014/093728
Other languages
English (en)
Chinese (zh)
Other versions
WO2016045201A3 (fr
Inventor
邓天应
陈细俊
劳宣招
许怀书
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 WO2016045201A2 publication Critical patent/WO2016045201A2/fr
Publication of WO2016045201A3 publication Critical patent/WO2016045201A3/fr

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Definitions

  • the present invention relates to the field of liquid crystal display terminals, and in particular, to a light guide plate and a liquid crystal display device.
  • the liquid crystal panel is one of the important components that determine the display quality of the entire liquid crystal display screen, which directly affects the viewing effect of the screen, and the existing liquid crystal panel has inevitable defects. For example, after the panel is formed, the local light transmittance is not Both, and there is a problem that the display screen is inconsistent. In addition, in the curved liquid crystal display, due to the bending of the liquid crystal panel, the light transmittance of the panel is greatly reduced, especially the area of the left and right parts of the panel is larger than the area of the middle portion of the panel, resulting in the liquid crystal display. The brightness of the output screen appears to be a problem of severe unevenness in the left, center, and right.
  • the main object of the present invention is to solve the technical problem that the brightness of the screen displayed on the liquid crystal panel is locally uneven.
  • the present invention provides a light guide plate including a light emitting surface, a bottom surface disposed opposite to the light emitting surface, and a light incident surface connecting the light emitting surface and the bottom surface, wherein the bottom surface is at least divided into a light guiding region and a second light guiding region, wherein the first light guiding region is arranged with a plurality of first shape mesh dots, and the second light guiding region is arranged with a plurality of second shape mesh dots, the first shape The dot and the second shape dot have different reflectivities to light.
  • the first light guiding region is located at a middle portion of the bottom surface, and the second light guiding region is located between the first light guiding region and the light incident surface; the reflected light of the second shape dot is stronger than The reflected light intensity of the first shape dot is strong.
  • a third light guiding area is disposed on the bottom surface, the third light guiding area is disposed between the light incident surface and the second light guiding area; and the third light guiding area includes a plurality of a uniformly arranged third shape dot, the reflected light intensity of the third shape dot being smaller than the reflected light intensity of the second shape dot.
  • the first shape dot and the second shape dot and the third shape dot are disposed on the bottom surface by a laser process or a printing process.
  • the first shape dot is a square shape
  • the second shape dot is a spherical shape
  • a third light guiding area is disposed on the bottom surface, the third light guiding area is disposed between the light incident surface and the second light guiding area; and the third light guiding area includes a plurality of a uniformly arranged third shape dot, the reflected light intensity of the third shape dot being smaller than the reflected light intensity of the second shape dot.
  • the first shape dot and the second shape dot and the third shape dot are disposed on the bottom surface by a laser process or a printing process.
  • the second light guiding regions are symmetrically disposed on both sides of the first light guiding region.
  • a third light guiding area is disposed on the bottom surface, the third light guiding area is disposed between the light incident surface and the second light guiding area; and the third light guiding area includes a plurality of a uniformly arranged third shape dot, the reflected light intensity of the third shape dot being smaller than the reflected light intensity of the second shape dot.
  • the first shape dot and the second shape dot and the third shape dot are disposed on the bottom surface by a laser process or a printing process.
  • the third light guiding region is disposed symmetrically with the first light guiding region as an axis.
  • the third light guiding area is in contact with the second light guiding area.
  • the light guide plate is arranged in a curved shape such that the light exit surface and the bottom surface are curved surfaces.
  • the present invention further provides a liquid crystal display device including a light source, a light guide plate, and a liquid crystal panel, the light guide plate including a light emitting surface, a bottom surface opposite to the light emitting surface, and Connecting the light-emitting surface to the light-incident surface of the bottom surface, wherein the bottom surface of the light guide plate includes a plurality of regions having different dot shapes, and the light source is opposite to the light-incident surface of the light guide plate, and the liquid crystal
  • the light panel emits light along the light guide surface of the light guide plate, and the light emitted by the light source is reflected by the light guide plate and reflected from the mesh point of the bottom surface of the light guide plate to be emitted from the light exit surface onto the liquid crystal panel.
  • the direction of propagation of the light is curved, and a plurality of regions of the bottom surface of the light guide plate having different dot shapes are arranged along the light propagation direction.
  • the light guide plate has two light-input surfaces disposed opposite to each other, and the bottom surface of the light guide plate sequentially includes a first light guide area, a second light guide area and a second shape having different dot shapes from the middle to the two light incident surfaces.
  • the dot of the second light guiding region has the strongest reflection ability for light
  • the dot of the first light guiding region is second
  • the dot of the third light guiding region has the weakest reflecting ability for light.
  • the liquid crystal display device further includes a reflective sheet, an optical film, and a front frame, the reflective sheet is disposed on a side of the back plate opposite to the light guide plate; the optical film is disposed on the guide
  • the front panel is disposed on the outer side of the plastic frame and is fixedly connected to the plastic frame, and the front frame and the plastic frame are fixed between the light panel and the liquid crystal panel.
  • a card slot for fixing the liquid crystal panel is formed between the two.
  • At least a first light guiding area and a second light guiding area are disposed on a bottom surface of the light guiding plate, and a plurality of first shape dot points are disposed on the first light guiding area, and a plurality of first light guiding areas are disposed on the second light guiding area a shape of the second shape dot, and the difference in the reflection ability of the first shape dot and the second shape dot to the light is different, so as to solve the problem that the partial transmittance of the liquid crystal panel is uneven, and the display screen is uneven.
  • a dot having a strong reflected light intensity is disposed at a corresponding position on the light guide plate, and a corresponding position on the light guide plate is in a region where the light transmittance is high on the liquid crystal panel.
  • the screen dots with weak reflected light are arranged, so that the light guide plate reflects the light onto the liquid crystal panel, and finally the brightness of the screen displayed by the entire liquid crystal panel is substantially the same, thereby improving the uniformity of the display screen of the liquid crystal display device.
  • FIG. 1 is a schematic structural view of a preferred embodiment of a light guide plate of the present invention.
  • FIG. 2 is a schematic view showing another perspective structure of FIG. 1;
  • FIG. 3 is a schematic structural view of a light guide plate applied to a liquid crystal display device according to the present invention.
  • FIG. 4 is a schematic enlarged view of a portion A of FIG. 3.
  • the invention provides a light guide plate suitable for a liquid crystal display device, and is particularly suitable for a side-entry liquid crystal display device, such as a side-entry liquid crystal television and a side-entry liquid crystal display.
  • the directions of the ends of the arrow z in FIG. 3 are defined as the left and right sides of the entire liquid crystal display device, that is, the propagation direction of the light.
  • the light guide plate includes a light emitting surface a, a bottom surface disposed opposite to the light emitting surface a, and a light incident surface b connecting the light emitting surface a and the bottom surface.
  • the light-incident surface b may be one or more, preferably two in the embodiment, and disposed oppositely; the bottom surface is divided at least with the first light guiding region 10 and the second light guiding region 20,
  • the first light guiding area 10 is arranged with a plurality of first shape dots 101
  • the second light guiding area 20 is arranged with a plurality of second shape dots 102, the first shape dots 101 and the second shape dots 102
  • the ability to reflect light is different.
  • the shape of the first shape dot 101 or the second shape dot 102 may be a spherical shape, a linear shape, a square shape or other polyhedral shape, such as a hexahedron.
  • the light guide plate is in the form of a flat plate. Of course, in other embodiments, the light guide plate may also be a curved arrangement.
  • the idea of the present embodiment is directed to the problem that the display screen has inconsistencies in brightness due to uneven local transmittance of the liquid crystal panel.
  • the light guiding region disposed on the bottom surface is not limited to the first light guiding region 10 and The second light guiding area 20 can also be disposed more.
  • the light transmittance of each area on the liquid crystal panel should be set. Specifically, the light penetration on the liquid crystal panel is corresponding to the bottom surface of the light guiding plate 100.
  • a dot having a relatively high reflected light intensity is disposed at a position of a lower region, and a dot having a weaker reflected light intensity is disposed on a bottom surface of the light guide plate 100 corresponding to a region of the liquid crystal panel having a higher light transmittance.
  • the brightness of the entire liquid crystal panel 200 should be uniform and substantially uniform.
  • the structure in which the light guide plate 100 is applied to the side-entry liquid crystal display device is as shown in FIGS. 3 and 4. Where L represents the path of the light reflected by each region of the light guide plate 100.
  • the present invention provides at least a first light guiding region 10 and a second light guiding region 20 on the bottom surface of the light guiding plate 100, and a plurality of first shape mesh points 101 are disposed on the first light guiding region 10, in the second light guiding region.
  • a plurality of second shape dots 102 are disposed on the second shape dot, and the reflection power of the first shape dot 101 and the second shape dot 102 is different from each other to solve the unevenness of the partial transmittance of the liquid crystal panel.
  • the said The first light guiding region 10 is located at a middle portion of the bottom surface, and the second light guiding region 20 is located between the first light guiding region 10 and the light incident surface b; the reflected light of the second shape dot 102 is stronger than The reflected light intensity of the first shape dot 101 is strong. It is easy to understand that the first shape dot 101 reflects the light incident through the light incident surface b toward the region where the light transmittance of the liquid crystal panel 200 is high, and the second shape dot 102 located at both ends of the bottom surface passes through the light incident surface.
  • the shapes of the first shape mesh point 101 and the second shape mesh point 102 are not limited, but the second shape dot 102 to be ensured is reflected by the light incident on the light incident surface b to form a light intensity greater than that of the first shape dot 102.
  • the intensity of the light intensity formed by the reflection of the light incident from the light-incident surface b by a shape dot 101 is as shown in FIG. 3, the first shape dot 101 is a square shape, and the second shape dot 102 is a spherical shape.
  • the spherical surface has a large reflecting area, and the amount of light reflected to the light emitting surface a is the largest, and the side of the square corresponding to the light emitting surface a is a plane, and only the surface can reflect the light toward the light emitting surface a, and therefore, the square body reflects toward the light emitting surface.
  • the amount of light of a is relatively small compared to the spherical surface, that is, the amount of light that is finally incident on the liquid crystal panel 200 is relatively small.
  • the dot shape of the square shape corresponds to the central portion of the liquid crystal panel 200
  • the dot of the spherical shape corresponds to the middle sides of the liquid crystal panel 200.
  • the area of the liquid crystal panel 200 is illuminated by the light reflected by the light guide plate 100, and the brightness of the entire liquid crystal panel 200 is substantially uniform and relatively uniform.
  • the second light guiding regions 20 are symmetrically disposed on both sides of the first light guiding region 10.
  • the second light guiding area 20 located on the left and right sides may be connected to the first light guiding area 10 located in the middle portion or spaced apart, regardless of the situation, due to the second light guiding on the left and right sides.
  • the area of the area 20 is the same as that of the central area of the liquid crystal panel 200, so that the display brightness of the left side screen of the liquid crystal panel 200 and the corresponding right side screen can be made uniform, thereby improving the uniformity of the screen brightness of the liquid crystal panel 200 as a whole. Sex.
  • the second light guiding region 20 is disposed on the two sides of the first light guiding region 10 to ensure that the light guide plate 100 reflects the light toward the liquid crystal panel 200 to the greatest extent.
  • the display brightness of the entire liquid crystal panel 200 is made substantially uniform.
  • the third light guiding area 30 is disposed on the bottom surface of the light guiding plate 100 corresponding to the left end and the right end of the light guiding plate 100, and the third light guiding area 30 is provided.
  • the third light guiding region 30 includes a plurality of evenly arranged third shape dots 103, and the reflection of the third shape dot 103 The light intensity is less than the reflected light intensity of the second shape dot 102.
  • the light guide plate 100 is divided into five dot reflection regions, a first light guiding region 10, two second light guiding regions 20, and two third light guiding regions 30, in order to ensure that the light guiding plate 100 will light.
  • the display brightness of the entire liquid crystal panel 200 is substantially uniform. It should be noted that, since the light guide plate 100 is light entering the left end and the right end side, that is, the light of the light guide plate 100 near the left end and the right end is concentrated, and the brightness is large, so that after the dot passing through the area is reflected, The intensity of the light is also large.
  • the reflected light intensity of the region at the right end position is set by a dot having a weak reflected light intensity, for example, a linear dot as shown in FIG.
  • the third light guiding area 30 is symmetrically disposed with the first light guiding area 10 as an axis.
  • the display brightness of the entire liquid crystal panel 200 is substantially uniform, and the third light guiding region 30 and the second light guiding region 20 are opposite to each other. Pick up.
  • the meshes of different shapes may be implemented by the same process or different processes.
  • the first shape dot 101, the second shape dot 102, and the third shape dot 103 are laser processed. Or a printing process is provided on the bottom surface.
  • the present invention also provides a liquid crystal display device.
  • the liquid crystal display device includes the light guide plate 100, and the liquid crystal panel 200, the heat dissipation plate 300, the back plate 400, the light source 500, and the plastic frame.
  • the detailed structure of the light guide plate 100 can be referred to the above embodiment, and details are not described herein.
  • the light guide plate 100 is disposed on the back plate 400 and along the left end to the right end of the back plate 400. a curved curved arrangement, wherein the left end and the right end of the back plate 400 are reference directions to the left and right of the entire liquid crystal display device in FIG.
  • the heat dissipation plate 300 includes a bottom plate 310 and extends upward from four sides of the bottom plate 310
  • the side wall 320 is disposed on the bottom plate 310.
  • the light source 500 is disposed on the side wall 320 and faces the light incident surface a of the light guide plate 100.
  • the plastic frame 600 The liquid crystal panel 200 is disposed on the plastic frame 200 and is opposite to the position of the light-emitting surface a of the light guide plate 100.
  • the liquid crystal panel 200 is along the back plate 400.
  • the left end to the right end are curvedly curved, and the liquid crystal panel 200 and the light guide plate 100 are disposed. Same bending angle, bending direction and consistent.
  • the screen brightness outputted by the liquid crystal display device has high uniformity, and the display effect of the liquid crystal display device can be improved.
  • the liquid crystal display device further includes a reflective sheet 700, an optical film 800, and a front frame 900.
  • the reflective sheet 700 is disposed on a side of the back plate 400 opposite to the light guide plate 100, and the optical film 800 is disposed.
  • the light guide plate 100 is disposed between the light guide plate 100 and the liquid crystal panel 200, and is connected to the plastic frame 600.
  • the front frame 900 is disposed outside the plastic frame 600 and is fixedly connected to the plastic frame 600.
  • a card slot (not shown) for holding and fixing the liquid crystal panel 200 is formed between the plastic frame 600 and the plastic frame 600.

Landscapes

  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

L'invention concerne un dispositif à plaque à guide lumineux. La plaque à guide lumineux comprend une surface apparente, une surface inférieure disposée à l'opposé de la surface apparente, et une surface d'incidence reliée à la surface apparente et à la surface inférieure. Au moins une première zone de guide lumineux et une deuxième zone de guide lumineux sont délimitées sur la surface inférieure. De multiples points de grille de première forme sont disposés dans la première zone de guide lumineux. De multiples points de grille de deuxième forme sont disposés dans la deuxième zone de guide lumineux. Les points de grille de première forme et les points de grille de deuxième forme diffèrent en termes de réflectivité par rapport à la lumière. L'invention concerne également un dispositif à afficheur à cristaux liquides. La présente invention résout le problème technique de partiellement que représente l'ombrage irrégulier au niveau de la luminosité d'une image affichée par un panneau à cristaux liquides, ce qui permet d'augmenter les effets d'affichage du dispositif d'affichage à cristaux liquides.
PCT/CN2014/093728 2014-09-24 2014-12-12 Plaque à guide lumineux et dispositif d'affichage à cristaux liquides WO2016045201A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201420553550.1U CN204129250U (zh) 2014-09-24 2014-09-24 导光板及液晶显示装置
CN201420553550.1 2014-09-24

Publications (2)

Publication Number Publication Date
WO2016045201A2 true WO2016045201A2 (fr) 2016-03-31
WO2016045201A3 WO2016045201A3 (fr) 2016-05-19

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PCT/CN2014/093728 WO2016045201A2 (fr) 2014-09-24 2014-12-12 Plaque à guide lumineux et dispositif d'affichage à cristaux liquides

Country Status (2)

Country Link
CN (1) CN204129250U (fr)
WO (1) WO2016045201A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108776412A (zh) * 2018-08-10 2018-11-09 Oppo广东移动通信有限公司 背光模组、液晶显示模组和电子装置
CN113866864A (zh) * 2021-10-18 2021-12-31 扬昕科技(苏州)有限公司 导光板及显示装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105676521A (zh) * 2014-12-29 2016-06-15 深圳Tcl新技术有限公司 液晶显示模组
CN104613384B (zh) * 2015-02-17 2017-09-01 深圳市华星光电技术有限公司 背光模组
CN105629575A (zh) * 2016-03-24 2016-06-01 京东方科技集团股份有限公司 一种曲面背光源及显示装置
CN106772761A (zh) * 2016-12-27 2017-05-31 广东晶科电子股份有限公司 一种高色域侧入式led背光模组
CN108181679A (zh) * 2017-11-29 2018-06-19 上海亚明照明有限公司 一种led灯具及其导光板
CN108761625B (zh) * 2018-05-11 2020-08-11 深圳市帝显电子有限公司 一种导光板及背光模组

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201083928Y (zh) * 2007-08-30 2008-07-09 比亚迪股份有限公司 背光源及其反光片
JP5469552B2 (ja) * 2010-07-08 2014-04-16 シャープ株式会社 液晶表示装置
CN102537754A (zh) * 2010-12-14 2012-07-04 上海蓝光科技有限公司 侧光式背光源模组
CN103675990B (zh) * 2013-12-26 2017-05-03 深圳Tcl新技术有限公司 弯曲导光板及其制作方法
CN203799042U (zh) * 2014-04-15 2014-08-27 瑞仪(广州)光电子器件有限公司 导光板、背光源模组及显示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108776412A (zh) * 2018-08-10 2018-11-09 Oppo广东移动通信有限公司 背光模组、液晶显示模组和电子装置
CN113866864A (zh) * 2021-10-18 2021-12-31 扬昕科技(苏州)有限公司 导光板及显示装置
CN113866864B (zh) * 2021-10-18 2024-05-28 扬昕科技(苏州)有限公司 导光板及显示装置

Also Published As

Publication number Publication date
WO2016045201A3 (fr) 2016-05-19
CN204129250U (zh) 2015-01-28

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