WO2019080027A1 - 导光板、背光模组及显示装置 - Google Patents

导光板、背光模组及显示装置

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Publication number
WO2019080027A1
WO2019080027A1 PCT/CN2017/107761 CN2017107761W WO2019080027A1 WO 2019080027 A1 WO2019080027 A1 WO 2019080027A1 CN 2017107761 W CN2017107761 W CN 2017107761W WO 2019080027 A1 WO2019080027 A1 WO 2019080027A1
Authority
WO
WIPO (PCT)
Prior art keywords
prism
region
guide plate
light guide
optical surface
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2017/107761
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
张嘉尹
翁巾婷
陈昊
钟翌菁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Radiant Guangzhou Opto Electronics Co Ltd
Radiant Opto Electronics Corp
Original Assignee
Radiant Guangzhou Opto Electronics Co Ltd
Radiant Opto Electronics Corp
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 Radiant Guangzhou Opto Electronics Co Ltd, Radiant Opto Electronics Corp filed Critical Radiant Guangzhou Opto Electronics Co Ltd
Priority to CN201780014960.5A priority Critical patent/CN109964157A/zh
Priority to PCT/CN2017/107761 priority patent/WO2019080027A1/zh
Priority to CN202510460475.7A priority patent/CN120215009A/zh
Priority to KR1020207011901A priority patent/KR102460679B1/ko
Priority to JP2020543660A priority patent/JP7098738B2/ja
Priority to TW106137987A priority patent/TWI629521B/zh
Priority to US16/232,150 priority patent/US10816715B2/en
Publication of WO2019080027A1 publication Critical patent/WO2019080027A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B6/0035—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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the invention relates to a light guiding component and an application thereof, and particularly to a light guiding plate and the application of the light guiding plate in a backlight module and a display device.
  • the light guide plate has a light incident surface, a light exit surface, and a reflective surface.
  • the light provided by the light source enters the light guide plate from the light incident surface of the light guide plate, and is emitted from the light exit surface of the light guide plate.
  • a microstructure is usually arranged on the light-emitting surface or the reflective surface of the light guide plate, but the general microstructure has a sparse entrance light side and gradually becomes dense toward the reverse light entrance side. A linear distribution tendency that tends to produce bright and dark lines on the light incident side to affect the optical appearance of the light guide plate. Therefore, there is a need for a light guide plate to solve the above problems.
  • the object of the present invention is to provide a light guide plate, a backlight module, and a display device, wherein the light guide plate has a prism design, which can respectively control the amount of light emitted from the light guide plate, thereby making the backlight module and the display device more High uniformity and appearance.
  • the light guide plate includes a body and a plurality of prism portions.
  • the body has a first extending direction that is perpendicular to each other and a second extending direction.
  • the body includes a light incident surface and an optical surface.
  • the light incident surface extends along the first extending direction.
  • the optical surface is coupled to the light surface, wherein the optical surface has a first side adjacent to the light incident surface and a second side remote from the light incident surface.
  • the second extending direction is parallel to the direction in which the first side extends toward the second side.
  • the optical surface has a first region, a second region, and a third region that are sequentially arranged along the second extending direction.
  • the prism portion is disposed on the optical surface, and each of the prism portions extends along the second extending direction, wherein an area ratio of a portion of the prism portion located in the first region is larger than a ratio of a portion of the portion of the prism portion located in the second region And smaller than the area ratio of the portion of the prism portion located in the third region.
  • each of the prism portions has a first width located at the first region, located a second width of the second region and a third width at the third region. Moreover, the first width is greater than the second width and the first width is less than the third width.
  • each of the prism portions is formed by a plurality of prism structures arranged along a second extending direction, wherein each of the prism structures located in the first region has a first width, each of the second regions The prism structure has a second width, and each of the prism structures located in the third region has a third width. Wherein the first width is greater than the second width and the first width is less than the third width.
  • each of the prism portions is formed by a plurality of prism structures arranged along the second extending direction.
  • the arrangement density of the prism structures located in the first region is greater than the arrangement density of the prism structures located in the second region, but less than the arrangement density of the prism structures located in the third region.
  • each of the prism portions is formed by a plurality of prism structures arranged along the second extending direction.
  • any two adjacent prism structures located along the second extending direction in the first region have a first pitch
  • any two adjacent prism structures in the second region along the second extending direction There is a second spacing therebetween, and there is a third spacing between any two adjacent prism structures along the second extending direction in the third region.
  • the second pitch is greater than the first pitch
  • the first pitch is greater than the third pitch.
  • each of the prism portions is formed by a plurality of prism structures arranged along a second extending direction, and each of the prism structures is connected to each other.
  • the light guide plate further includes a plurality of light mixing structures.
  • the light mixing structure is disposed on the optical surface, and the light mixing structure is located between the first side and the first area.
  • each of the prism portions is formed by a plurality of prism structures arranged along the second extending direction.
  • Each prism structure includes a first optical surface and a second optical surface.
  • the first optical surface is inclined relative to the light incident surface, and the first optical surface forms a first tilt angle extending from the bottom to the top.
  • the second optical surface is inclined with respect to the light incident surface, and the second optical surface forms a second tilt angle extending from the bottom to the top.
  • the first tilt angle is smaller than the second tilt angle, and the first optical surface is close to the light incident surface, and the second optical surface is away from the light incident surface.
  • the interconnection of the first optical face and the second optical face of each prism structure forms a ridge line and the ridge line is substantially parallel to the first side.
  • the backlight module includes the foregoing light guide plate and a light source.
  • the light source is adjacent to the light incident surface of the light guide plate.
  • the display device includes the foregoing backlight module and a display panel.
  • the display panel is disposed in front of the light guide plate.
  • the light guide plate of the present invention has a plurality of prism portions, and each of the prism portions is adjacent to the light incident surface of the light guide plate, away from the light incident surface of the light guide plate (reverse light incident surface), and the area occupied by the light guide plate. Differently, the amount of light emitted from different positions of the light guide plate can be separately controlled, thereby improving the uniformity of light output of the entire light guide plate.
  • FIG. 1A is a schematic view showing a device of a backlight module according to a first embodiment of the present invention
  • 1B is a graph showing a change in the area ratio of the prism portion at different positions on the optical surface of the light guide plate according to the first embodiment of the present invention
  • FIG. 2A is a partial schematic view showing a backlight module according to a first embodiment of the present invention
  • Figure 2B shows a cross-sectional view taken along line A-A of Figure 2A;
  • FIG. 3 is a partial schematic view showing a backlight module according to a second embodiment of the present invention.
  • FIG. 4A is a partial schematic view showing a backlight module according to a third embodiment of the present invention.
  • Figure 4B shows a cross-sectional view taken along line B-B of Figure 4A;
  • FIG. 5 is a partial schematic view showing a backlight module according to a fourth embodiment of the present invention.
  • FIG. 6 is a partial schematic view showing a backlight module according to a fifth embodiment of the present invention.
  • FIG. 7 shows a schematic diagram of a device of a display device in accordance with an embodiment of the present invention.
  • the backlight module 100 of the present embodiment mainly includes a light guide plate 200 and a light source 300.
  • the light guide plate 200 includes a main body 210 and a plurality of prism portions 220. These prism portions 220 are disposed on the body 210. By providing the prism portion 220, the optical tendency of the light guide plate 200 can be adjusted, and the uniformity of the appearance of the light guide plate 200 can be improved.
  • the main body 210 may be a light transmissive plate or other equivalent light transmissive member.
  • the body 210 has a first extending direction D1 and a second extending direction D2, and the first extending direction D1 is perpendicular to the second extending direction D2.
  • the main body 210 mainly includes a light incident surface 211 and an optical surface 212.
  • the light incident surface 211 extends along the first extending direction D1.
  • the optical surface 212 is connected to the light surface 211.
  • the optical surface 212 is a light exiting surface.
  • the optical surface 212 can also be a reflective surface.
  • the light source 300 is disposed beside the light incident surface 211, and the light generated by the light source 300 can enter the light guide plate 200 from the light incident surface 211.
  • the optical surface 212 has an opposite first side 212a and a second side 212b, wherein the first side 212a is closer to the light incident surface 211, and the second side 212b is closer to the light incident surface 211.
  • the second extending direction D2 is parallel to the extending direction of the first side 212a toward the second side 212b.
  • the optical surface 212 has a first area A1, a second area A2, and a third area A3 that are sequentially arranged along the second extending direction D2. It should be understood that the dashed box shown in FIG. 1A is only used to indicate the first area A1, the second area A2, and the third area A3 referred to in the present invention, and the dashed box itself does not belong to the light guide plate 200 of the present invention. structure.
  • the prism portion 220 is disposed on the optical surface 212.
  • each of the prism portions 220 extends along the second extending direction D2 and simultaneously spans the first area A1, the second area A2, and the third area A3.
  • FIG. 1B is a graph showing changes in the area ratio of the prism portions at different positions on the optical surface of the light guide plate according to the first embodiment of the present invention.
  • the 0 mm of the vertical axis represents the position where the optical surface 212 is connected to the light incident surface 211, and the larger the numerical value of the vertical axis represents the farther the position is from the light incident surface 211.
  • the ratio of the area occupied by the portion of the prism portion 220 in the first area A1 is larger than the area ratio of the portion of the prism portion 220 located in the second area A2, and is smaller than the area of the prism portion 220 located in the third area.
  • each of the prism portions 220 has a first width W1, a second width W2, and a third width W3.
  • a portion of the prism portion 220 having the first width W1 is located in the first region A1, a portion of the prism portion 220 having the second width W2 is located in the second region A2, and a portion of the prism portion 220 having the third width W3 is located in the third region A3.
  • the first width W1 is greater than the second width W2, and the first width W1 is smaller than the third width W3, whereby the ratio of the area occupied by the portion of the prism portion 220 in the first area A1 is larger than the area ratio of the prism portion 220 in the second area.
  • the area ratio of the portion in A2 is smaller than the area ratio of the portion of the prism portion 220 located in the third region A3. It should be understood that the first width W1, the second width W2, and the third width W3 referred to herein are the maximum widths of the portions of the prism portion 220 located in the first region A1, the second region A2, and the third region A3, respectively.
  • each of the prism portions 220 is formed by sequentially arranging a plurality of prism structures (for example, the prism structure 221, the prism structure 222, and the prism structure 223) along the second extending direction D2.
  • the prism structure 221 is located in the first area A1
  • the prism structure 222 is located in the second area A2
  • the prism structure 223 is located in the third area A3.
  • FIG. 2A shows a partial schematic view of a backlight module according to a first embodiment of the present invention
  • FIG. 2B shows a section taken along line AA of FIG. 2A. Sectional view.
  • the prism structure 221, the prism structure 222 and the prism structure 223 are connected to each other along the second extending direction D2.
  • the prism structure 221, the prism structure 222 and the prism structure 223 are both convex structures and have the same length L1 and height H1.
  • the prism structure 221, the prism structure 222 and the prism structure 223 have substantially the same structure except for the first width W1' of the prism structure 221, the second width W2' of the prism structure 222, and the third width of the prism structure 223. W3' is different from each other. Therefore, the dimensions of the prism structure 221, the prism structure 222, and the prism structure 223 are different from each other.
  • the first width W1 ′ is greater than the second width W2 ′, and the first width W1 ′ is smaller than the third width W3 ′, thereby the prism structure 221 can be located at the first
  • the area ratio of the portion in the area A1 is larger than the area ratio of the portion of the prism structure 222 located in the second area A2, and smaller than the area ratio of the portion of the prism structure 223 located in the third area A3.
  • the amount of light emitted from the prism structure 221 near the light incident surface 211 can be significantly improved, so as to solve the problem that it is easy to generate on the light incident side in the prior art.
  • the problem of bright and dark lines can make the brightness of the optical surface 212 of the light guide plate 200 more uniform.
  • prism structure 222 includes a first optical surface 222a and a second optical surface 222b.
  • the first optical surface 222a is closer to the light incident surface 211, and the second optical surface 222b is closer to the light incident surface 211.
  • the first optical surface 222a is coupled to the optical surface 212 and is inclined with respect to the light incident surface 211, thereby forming a first tilt angle ⁇ .
  • the first optical surface 222a extends from the bottom to the top, and the first tilt angle ⁇ is the angle between the first optical surface 222a and the horizontal plane passing through the bottom of the first optical surface 222a, wherein the horizontal plane and the optical surface 212 are same plane.
  • the second optical surface 222b connects the optical surface 212 and the first optical surface 222a.
  • the second optical surface 222b is inclined with respect to the light incident surface 211, thereby forming a second tilt angle ⁇ .
  • the second optical surface 222b extends from the bottom to the top, and the second inclination angle ⁇ is an angle between the second optical surface 222b and a horizontal plane passing through the bottom of the second optical surface 222b, wherein the horizontal plane and the optical surface 212 are same plane.
  • the first optical surface 222a and the second optical surface 222b are connected to each other by a ridge line 222c, and the ridge line 222c is substantially Parallel to the first side 212a of the optical face 212.
  • the first tilt angle ⁇ is smaller than the second tilt angle ⁇ , and the first tilt angle ⁇ faces the light incident surface 211, and the second tilt angle ⁇ faces away from the light incident surface 211.
  • the first optical surface 222a and the second optical surface 222b are mainly used to change the direction in which light is emitted from the prism structure 222. It should be understood that the structure of the prism structure 221 and the prism structure 223 is substantially the same as the structure of the prism structure 222, and both include a first optical surface and a second optical surface inclined with respect to the light incident surface 211, so as to achieve the purpose of changing the light directivity. Therefore, it will not be repeated here.
  • the light guide plate may have other different structural designs.
  • FIG. 3 shows a partial schematic view of a backlight module according to a second embodiment of the present invention.
  • the structure of the light guide plate 400 is substantially the same as that of the light guide plate 200 of the first embodiment, with the difference that the prism portions 420 of the light guide plate 400 have different structural designs.
  • each of the prism portions 420 is formed by sequentially arranging a plurality of prism structures (for example, the prism structure 421, the prism structure 422, and the prism structure 423) along the second extending direction D2.
  • the prism structure 421 is located in the first area A1, the prism structure 422 is located in the second area A2, and the prism structure 423 is located in the third area A3.
  • the prism structure 421, the prism structure 422, and the prism structure 423 are substantially the same in size and shape. Moreover, the arrangement density of the prism structures 421 located in the first region A1 is greater than the arrangement density of the prism structures 422 located in the second region A2, but smaller than the arrangement density of the prism structures 423 located in the third region A3, This allows the area ratio of the portion of the prism portion 420 located in the first area A1 to be larger than the area ratio of the portion of the prism portion 420 located in the second area A2, and is smaller than the portion of the portion of the prism portion 420 located in the third area A3. Area ratio.
  • the amount of light emitted from the prism structure 421 close to the light incident surface 211 can be significantly improved to solve the problem that the light source side is easily generated in the prior art.
  • the problem of bright and dark lines can thus make the brightness of the optical surface 212 of the light guide plate 400 more uniform.
  • the structural design of the prism structure 421, the prism structure 422, and the prism structure 423 of the present embodiment is substantially the same as the structural design of the prism structure 222 shown in FIGS. 2A and 2B, and thus will not be described herein.
  • the prism structure 421, the prism structure 422, and the prism structure 423 of the present embodiment are sized identically for illustrative purposes only. In other embodiments, the prism structure 421, the prism structure 422, and the prism structure 423 may also be sized differently.
  • the width of the prism structure 421 may be greater than the width of the prism structure 422 and smaller than the width of the prism structure 423, thereby changing the portions of the prism portion 420 located in the first area A1, the second area A2, and the third area A3, respectively.
  • the area ratio of the points further controls the amount of light emitted from the first area A1, the second area A2, and the third area A3 of the light guide plate 400, respectively.
  • FIG. 4A shows a partial schematic view of a backlight module according to a third embodiment of the present invention
  • FIG. 4B shows a section taken along the line BB of FIG. 4A.
  • the structure of the light guide plate 500 is substantially the same as that of the light guide plate 200 of the first embodiment, with the difference that the prism portion 520 of the light guide plate 500 has a different structural design.
  • each of the prism portions 520 is formed by sequentially arranging a plurality of prism structures (for example, the prism structure 521, the prism structure 522, and the prism structure 523) along the second extending direction D2.
  • the prism structure 521 is located in the first area A1
  • the prism structure 522 is located in the second area A2
  • the prism structure 523 is located in the third area A3.
  • the prism structure 521, the prism structure 522, and the prism structure 523 are substantially the same in size and shape. Wherein any two adjacent prism structures 521 located along the second extending direction D2 in the first area A1 have a first spacing S1 between them, and any two of the second areas A2 along the second extending direction D2 The adjacent prism structures 522 have a second spacing S2 therebetween, and any two adjacent prism structures 523 located along the second extending direction D2 in the third region A3 have a third spacing S3 therebetween.
  • the second spacing S2 is greater than the first spacing S1, and the first spacing S1 is greater than the third spacing S3, whereby the area ratio of the portion of the prism portion 520 located in the first area A1 is greater than the second portion of the prism portion 520.
  • the area ratio of the portion in A2 is smaller than the area ratio of the portion of the prism portion 520 located in the third region A3. Therefore, when the light generated by the light source 300 enters the light guide plate 500 from the light incident surface 211, the amount of light emitted from the prism structure 521 near the light incident surface 211 can be significantly improved to solve the problem that the light source side is easily generated in the prior art.
  • the problem of bright and dark lines makes the brightness of the optical surface 212 of the light guide plate 500 more uniform.
  • the structural design of the prism structure 521, the prism structure 522, and the prism structure 523 of the present embodiment is substantially the same as that of the prism structure 222 shown in FIG. 2A and FIG. 2B, and therefore will not be described herein.
  • the prism structure 521, the prism structure 522, and the prism structure 523 of the present embodiment are sized identically for illustrative purposes only. In other embodiments, the prism structure 521, the prism structure 522, and the prism structure 523 may also be sized differently.
  • the width of the prism structure 521 may be greater than the width of the prism structure 522 and smaller than the width of the prism structure 523, thereby changing the area occupied by the prism portion 520 in the first region A1, the second region A2, and the third region A3, respectively. ratio.
  • the row of prism structures 521 of A1 in the first region may also be changed.
  • the column density, the arrangement density of the prism structures 522 located in the second region A2, and the arrangement density of the prism structures 523 located in the third region A3, thereby changing the prism portions 520 in the first regions A1, 2, respectively The area ratio of the portion in the area A2 and the third area A3.
  • the structure of the light guide plate 600 is substantially the same as that of the light guide plate 200 of the first embodiment, with the difference that the light guide plate 600 further includes a light mixing structure 601.
  • the light mixing structure 601 is disposed on the optical surface 212 and located between the light incident surface 211 and the first area A1.
  • the light mixing structure 601 is a strip structure, and the strip structure may be a convex portion protruding from the optical surface 212 or a concave portion recessed into the optical surface 212.
  • the light mixing structure 601 extends along the second extending direction D2. Therefore, after entering the light guide plate 600, the light emitted by the light source 300 first forms a uniform light through the light mixing structure 601, thereby improving the appearance of the visible light and dark lines on the light incident side of the known light guide plate. problem.
  • the light mixing structure 601 of the light guide plate 600 of the embodiment of FIG. 5 is matched with the prism portion 220 for illustrative purposes only. In other embodiments, the light mixing structure 601 of the light guide plate 600 may also be combined with the prism portion 420 as shown in FIG. 3 or the prism portion 520 as shown in FIG. 4 to produce the same effect.
  • the aforementioned prism structure is a convex structure for illustrative purposes only. In other embodiments, the prism structure can also be a concave structure.
  • FIG. 6 a partial schematic view of a backlight module according to a fifth embodiment of the present invention is shown.
  • the structure of the light guide plate 700 is substantially the same as that of the light guide plate 200 of the first embodiment, with the difference that the prism structures 721, 722, and 723 of the light guide plate 700 have different structural designs.
  • the prism structures 721, 722, and 723 are recessed structures.
  • prism structure 722 includes a first optical surface 722a and a second optical surface 722b.
  • the first optical surface 722a is closer to the light incident surface 211, and the second optical surface 722b is closer to the light incident surface 211.
  • the first optical surface 722a is inclined with respect to the light incident surface 211, thereby forming a first tilt angle ⁇ ' extending from the bottom to the top.
  • the second optical surface 722b is inclined with respect to the light incident surface 211, thereby forming a second inclination angle ⁇ ' extending from the bottom to the top.
  • the first angle of inclination ⁇ ' is less than the second angle of inclination ⁇ '.
  • the first optical surface 722a and the second optical surface 722b are mainly used to change the direction in which light is emitted from the prism structure 722.
  • the structures of the prism structure 721 and the prism structure 723 are substantially the same as those of the prism structure 722, and both include a first optical surface and a second optical surface inclined with respect to the light incident surface 211, so as to achieve the purpose of changing the light directivity. Therefore, it will not be repeated here.
  • the prism structures 221, 222 of the embodiment shown in FIG. 2B And 223 is a convex portion. Therefore, most of the light emitted from the light source 300 enters the light guide plate 200 from the light incident surface 211, and then is incident on the second optical surface (for example, the second optical surface 222b). That is, the second optical surfaces of the prism structures 221, 222, and 223 are direct light receiving surfaces. Therefore, in order to achieve the purpose of guiding light, in some embodiments, the area of the second optical surface of the prism structures 221, 222, and 223 may be larger than the area of the first optical surface to improve the light extraction efficiency and uniform appearance of the light guide plate 200. Sex.
  • the prism structures 721, 722, and 723 of the embodiment shown in FIG. 6 are recessed portions, most of the light emitted from the light source 300 enters the light guide plate 700 from the light incident surface 211 and is incident on the first optical surface ( For example, the first optical surface 722a). That is, the first optical faces of the prism structures 721, 722, and 723 are direct light receiving faces. Therefore, in the structural design, the area of the first optical surface of the prism structures 721, 722, and 723 may be larger than the area of the second optical surface to improve the light extraction efficiency and uniformity of the appearance of the light guide plate 700.
  • FIG. 7 shows a schematic diagram of a device of a display device according to an embodiment of the present invention.
  • the display device 800 of the present embodiment includes a backlight module 100 and a display panel 810 as shown in FIGS. 2A and 2B.
  • the display panel 810 is disposed in front of the light guide plate 200 of the backlight module 100 , and the same purpose as described above can be achieved, and thus no further details are provided herein.
  • the embodiment of the present application is applied to the display device 800 by using the backlight module 100 having the light guide plate 200 shown in FIG. 2A and FIG. 2B for exemplary purposes only, and is not intended to limit the present invention.
  • the light guide plates of the other embodiments described above, such as the light guide plates 400, 500, 600, and 700, can also be applied to a display device to produce the same effect.
  • the light guide plate of the present invention has a plurality of prism portions, and each of the prism portions is adjacent to the light incident surface of the light guide plate, away from the light incident surface of the light guide plate (reverse light incident surface), and the middle of the light guide plate.
  • the occupied area is different, so that the amount of light emitted at different positions of the light guide plate can be separately controlled, thereby improving the uniformity of light emission of the entire light guide plate.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
PCT/CN2017/107761 2017-10-26 2017-10-26 导光板、背光模组及显示装置 Ceased WO2019080027A1 (zh)

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CN201780014960.5A CN109964157A (zh) 2017-10-26 2017-10-26 导光板、背光模组及显示装置
PCT/CN2017/107761 WO2019080027A1 (zh) 2017-10-26 2017-10-26 导光板、背光模组及显示装置
CN202510460475.7A CN120215009A (zh) 2017-10-26 2017-10-26 导光板、背光模组及显示装置
KR1020207011901A KR102460679B1 (ko) 2017-10-26 2017-10-26 도광판, 백라이트 모듈 및 디스플레이 장치
JP2020543660A JP7098738B2 (ja) 2017-10-26 2017-10-26 導光板、バックライトモジュール及び表示装置
TW106137987A TWI629521B (zh) 2017-10-26 2017-11-02 導光板、背光模組及顯示裝置
US16/232,150 US10816715B2 (en) 2017-10-26 2018-12-26 Light guide plate, backlight module and display device

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TW201917426A (zh) 2019-05-01
CN109964157A (zh) 2019-07-02
US10816715B2 (en) 2020-10-27
JP2021508929A (ja) 2021-03-11
CN120215009A (zh) 2025-06-27
TWI629521B (zh) 2018-07-11
KR102460679B1 (ko) 2022-10-28
JP7098738B2 (ja) 2022-07-11
US20190129086A1 (en) 2019-05-02

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