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
Application number
PCT/CN2017/107761
Other languages
English (en)
French (fr)
Inventor
张嘉尹
翁巾婷
陈昊
钟翌菁
Original Assignee
瑞仪(广州)光电子器件有限公司
瑞仪光电股份有限公司
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 瑞仪(广州)光电子器件有限公司, 瑞仪光电股份有限公司 filed Critical 瑞仪(广州)光电子器件有限公司
Priority to CN201780014960.5A priority Critical patent/CN109964157A/zh
Priority to PCT/CN2017/107761 priority patent/WO2019080027A1/zh
Priority to JP2020543660A priority patent/JP7098738B2/ja
Priority to KR1020207011901A priority patent/KR102460679B1/ko
Priority to TW106137987A priority patent/TWI629521B/zh
Priority to US16/232,150 priority patent/US10816715B2/en
Publication of WO2019080027A1 publication Critical patent/WO2019080027A1/zh

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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
    • G02B6/0033—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
    • G02B6/0033—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
    • G02B6/0066—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.

Abstract

本发明涉及导光板、背光模组及显示装置。导光板包括主体及多个棱镜部。主体具有互相垂直的第一延伸方向及第二延伸方向。主体包括入光面及光学面。入光面沿着第一延伸方向延伸。光学面连接入光面，且具有靠近入光面的第一侧及远离入光面的第二侧。第二延伸方向平行于第一侧朝向第二侧的延伸方向。光学面具有沿着第二延伸方向依次排列的第一区域、第二区域及第三区域。棱镜部设置在光学面上，且沿着第二延伸方向延伸。棱镜部位于第一区域中的部分所占面积比大于棱镜部位于第二区域中的部分所占面积比，且小于棱镜部位于第三区域中的部分所占面积比。

Description

导光板、背光模组及显示装置 技术领域
本发明涉及一种导光组件及其应用，且特别涉及一种导光板与该导光板在背光模组及显示装置中的应用。
背景技术
导光板具有入光面、出光面以及反射面。光源所提供的光线从导光板的入光面进入导光板中，并从导光板的出光面射出。为了使得经过导光板内部的光源能够更均匀地混合，通常会在导光板的出光面或反射面设置微结构，但一般的微结构具有在入光侧较稀疏且朝向反入光侧逐渐密集的线性分布趋势，该线性分布趋势容易在入光侧产生亮暗纹从而影响导光板的光学外观。因此，亟需一种导光板，以解决上述问题。
发明内容
因此，本发明的目的在于提供导光板、背光模组及显示装置，其中，该导光板具有棱镜的设计，其可分别控制导光板各处的出光量，进而使背光模组与显示装置产生较高的均齐度以及外观品味。
根据本发明的上述目的，提出了一种导光板。该导光板包括主体以及多个棱镜部。主体具有互相垂直的第一延伸方向以及第二延伸方向。主体包括入光面以及光学面。入光面沿着第一延伸方向延伸。光学面连接入光面，其中，光学面具有靠近入光面的第一侧以及远离入光面的第二侧。第二延伸方向平行于第一侧朝向第二侧的延伸方向。而且，光学面具有沿着第二延伸方向依次排列的第一区域、第二区域以及第三区域。棱镜部设置在光学面上，且每一个棱镜部沿着第二延伸方向延伸，其中，棱镜部位于第一区域中的部分所占面积比大于棱镜部位于第二区域中的部分所占面积比，且小于棱镜部位于第三区域中的部分所占面积比。
根据本发明的实施例，每一个棱镜部具有位于第一区域的第一宽度、位于 第二区域的第二宽度、以及位于第三区域的第三宽度。而且，第一宽度大于第二宽度，且第一宽度小于第三宽度。
根据本发明的实施例，每一个棱镜部由多个棱镜结构沿着第二延伸方向排列形成，其中，位于第一区域中的每一个棱镜结构具有第一宽度，位于第二区域中的每一个棱镜结构具有第二宽度，且位于第三区域中的每一个棱镜结构具有第三宽度。其中，第一宽度大于第二宽度，且第一宽度小于第三宽度。
根据本发明的实施例，每一个棱镜部由多个棱镜结构沿着第二延伸方向排列形成。其中，位于第一区域中的棱镜结构的排列密集度大于位于第二区域中的棱镜结构的排列密集度，但小于位于第三区域中的棱镜结构的排列密集度。
根据本发明的实施例，每一个棱镜部由多个棱镜结构沿着第二延伸方向排列形成。其中，位于第一区域中沿着第二延伸方向的任意两个相邻的棱镜结构之间具有第一间距，位于第二区域中沿着第二延伸方向的任意两个相邻的棱镜结构之间具有第二间距，位于第三区域中沿着第二延伸方向的任意两个相邻的棱镜结构之间具有第三间距。第二间距大于第一间距，且第一间距大于第三间距。
根据本发明的实施例，每一个棱镜部由多个棱镜结构沿着第二延伸方向排列形成，每一个棱镜结构互相连接。
根据本发明的实施例，导光板还包括多个混光结构。混光结构设置在光学面上，且混光结构位于第一侧与第一区域之间。
根据本发明的实施例，每一个棱镜部由多个棱镜结构沿着第二延伸方向排列形成。每一个棱镜结构包括第一光学面以及第二光学面。第一光学面相对入光面倾斜，第一光学面形成从底部延伸至顶部的第一倾角。第二光学面相对入光面倾斜，第二光学面形成从底部延伸至顶部的第二倾角。其中，第一倾角小于第二倾角，而且第一光学面靠近入光面，第二光学面远离该入光面。
根据本发明的实施例，每一个棱镜结构的第一光学面与第二光学面的相互连接形成了脊线，且脊线实质上平行于第一侧。
根据本发明的上述目的，还提出一种背光模组。背光模组包括前述导光板以及光源。光源邻设于导光板的入光面。
根据本发明的上述目的，还提出一种显示装置。显示装置包括前述背光模组以及显示面板。显示面板设置在导光板的前方。
由上述可知，本发明的导光板具有多个棱镜部，且每一个棱镜部分别在靠近导光板入光面、远离导光板入光面(反入光面)以及导光板的中间所占的面积不同，故可分别控制导光板不同位置处的出光量，进而可提升整体导光板的出光均齐度。
附图说明
为了更完整地了解实施例及其优点，现参照附图做出下列描述，其中：
图1A示出了根据本发明的第一实施方式的背光模组的装置示意图；
图1B示出了根据本发明的第一实施方式的棱镜部在导光板的光学面上不同位置处所占面积比的变化曲线图；
图2A示出了根据本发明的第一实施方式的背光模组的局部示意图；
图2B示出了沿着图2A的A-A剖面线所剖切的剖面图；
图3示出了根据本发明的第二实施方式的背光模组的局部示意图；
图4A示出了根据本发明的第三实施方式的背光模组的局部示意图；
图4B示出了沿着图4A的B-B剖面线所剖切的剖面图；
图5示出了根据本发明的第四实施方式的背光模组的局部示意图；
图6示出了根据本发明的第五实施方式的背光模组的局部示意图；以及
图7示出了根据本发明的实施方式的显示装置的装置示意图。
具体实施方式
请参照图1A，其示出了根据本发明的第一实施方式的背光模组的装置示意图。本实施方式的背光模组100主要包括导光板200以及光源300。导光板200包括主体210以及多个棱镜部220。这些棱镜部220设置在主体210上。通过设置棱镜部220，可调整导光板200的光学趋势，并可提升导光板200的出光外观的均匀性。
请继续参照图1A，在导光板200中，主体210可为透光板或其他等效的透光件。在本实施例中，主体210具有第一延伸方向D1以及第二延伸方向D2，且第一延伸方向D1垂直第二延伸方向D2。此外，主体210主要包括入光面211以及光学面212。其中，入光面211沿着第一延伸方向D1延伸。光学面212连接入光面211。在本实施例中，光学面212为出光面。在其他实施例中， 光学面212亦可为反射面。光源300设置在入光面211旁，且光源300所产生的光线可从入光面211进入导光板200。
在一个实施例中，光学面212具有相对的第一侧212a及第二侧212b，其中，第一侧212a较靠近入光面211，第二侧212b较远离入光面211。其中，第二延伸方向D2平行于第一侧212a朝向第二侧212b的延伸方向。在一个实施例中，光学面212具有沿着第二延伸方向D2依次排列的第一区域A1、第二区域A2以及第三区域A3。应理解，图1A所示的虚线方框仅用来示意本发明所指的第一区域A1、第二区域A2以及第三区域A3，该虚线方框本身并不属于本发明的导光板200的结构。
请继续参照图1A，棱镜部220设置在光学面212上。在本实施例中，每一个棱镜部220沿着第二延伸方向D2延伸，并同时跨越第一区域A1、第二区域A2以及第三区域A3。请同时参照图1B，其示出了根据本发明的第一实施方式的棱镜部在导光板的光学面上不同位置处所占面积比的变化曲线图。其中，纵轴的0mm代表光学面212与入光面211连接的位置，且纵轴的数值越大代表位置距离入光面211越远。如图1A及图1B所示，棱镜部220位于第一区域A1中的部分所占面积比大于棱镜部220位于第二区域A2中的部分所占面积比，且小于棱镜部220位于第三区域A3中的部分所占面积比。藉此，当光源300所产生的光线从入光面211进入导光板200后，分别由棱镜部220位于第一区域A1中的部分、棱镜部220位于第二区域A2中的部分、以及棱镜部220位于第三区域A3的部分射出的出光量不同，故可使整体光学面212的出光亮度更均一。
在一个实施例中，每一个棱镜部220具有第一宽度W1、第二宽度W2及第三宽度W3。棱镜部220具有第一宽度W1的部分位于第一区域A1中，棱镜部220具有第二宽度W2的部分位于第二区域A2中，棱镜部220具有第三宽度W3的部分位于第三区域A3中。其中，第一宽度W1大于第二宽度W2，且第一宽度W1小于第三宽度W3，藉此可使棱镜部220位于第一区域A1中的部分所占面积比大于棱镜部220位于第二区域A2中的部分所占面积比，且小于棱镜部220位于第三区域A3中的部分所占面积比。应理解，在此所指的第一宽度W1、第二宽度W2与第三宽度W3为棱镜部220分别位于第一区域A1、第二区域A2及第三区域A3中的部分的最大宽度。
请继续参照图1A，在本实施例中，每一个棱镜部220由多个棱镜结构(例如棱镜结构221、棱镜结构222以及棱镜结构223)沿着第二延伸方向D2依次排列形成。其中，棱镜结构221位于第一区域A1中，棱镜结构222位于第二区域A2中，棱镜结构223位于第三区域A3中。请同时参照图2A及图2B，其中，图2A示出了根据本发明的第一实施方式的，背光模组的局部示意图，图2B示出了沿着图2A的A-A剖面线所剖切的剖面图。在本实施例中，棱镜结构221、棱镜结构222与棱镜结构223沿着第二延伸方向D2互相连接。在本实施例中，棱镜结构221、棱镜结构222与棱镜结构223均为凸出结构，且具有相同的长度L1与高度H1。而且，棱镜结构221、棱镜结构222与棱镜结构223的结构大致上相同，差异仅在于棱镜结构221的第一宽度W1’、棱镜结构222的第二宽度W2’、以及棱镜结构223的第三宽度W3’彼此不同。因此，棱镜结构221、棱镜结构222与棱镜结构223的尺寸彼此不同。
请继续参照图2A及图2B，在本实施例中，第一宽度W1’大于第二宽度W2’，且第一宽度W1’小于第三宽度W3’，藉此可使棱镜结构221位于第一区域A1中的部分所占面积比大于棱镜结构222位于第二区域A2中的部分所占面积比，且小于棱镜结构223位于第三区域A3中的部分所占面积比。因此，当光源300所产生的光线从入光面211进入导光板200后，从靠近入光面211的棱镜结构221射出的出光量能够明显提升，以解决现有技术中容易在入光侧产生亮暗纹的问题，因此可使导光板200的光学面212的出光亮度更均一。
在一个示范例子中，棱镜结构222包括第一光学面222a以及第二光学面222b。其中，第一光学面222a较靠近入光面211，第二光学面222b较远离入光面211。第一光学面222a连接光学面212，并相对入光面211倾斜，由此形成第一倾角α。应理解，第一光学面222a从底部延伸至顶部，且第一倾角α为第一光学面222a与经过第一光学面222a底部的水平面之间的夹角，其中，该水平面与光学面212为同一平面。
第二光学面222b连接光学面212与第一光学面222a。第二光学面222b相对入光面211倾斜，由此形成第二倾角β。应理解，第二光学面222b从底部延伸至顶部，且第二倾角β为第二光学面222b与经过第二光学面222b底部的水平面之间的夹角，其中，该水平面与光学面212为同一平面。其中，第一光学面222a与第二光学面222b相互连接之处为脊线222c，且该脊线222c实质上 平行于光学面212的第一侧212a。在一些实施例中，如图2B所示，第一倾角α小于第二倾角β，且第一倾角α面向入光面211，第二倾角β背向入光面211。在本实施例中，第一光学面222a与第二光学面222b主要用来改变光线从棱镜结构222射出的方向。应理解，棱镜结构221与棱镜结构223的结构与棱镜结构222的结构大致上相同，均包括相对入光面211倾斜的第一光学面与第二光学面，以达到改变光指向性的目的，故在此不再赘述。
在其他实施例中，导光板亦可有其他不同的结构设计。请参照图3，其示出了根据本发明的第二实施方式的背光模组的局部示意图。在本实施例中，导光板400的结构与第一实施例的导光板200大致上相同，差异在于导光板400的棱镜部420具有不同的结构设计。在本实施例中，每一个棱镜部420由多个棱镜结构(例如棱镜结构421、棱镜结构422以及棱镜结构423)沿着第二延伸方向D2依次排列形成。其中，棱镜结构421位于第一区域A1中，棱镜结构422位于第二区域A2中，棱镜结构423位于第三区域A3中。
如图3所示，在一个实施例中，棱镜结构421、棱镜结构422以及棱镜结构423的结构尺寸与形状实质上相同。而且，位于第一区域中A1的棱镜结构421的排列密集度大于位于第二区域A2中的棱镜结构422的排列密集度，但小于位于第三区域A3中的棱镜结构423的排列密集度，藉此可使棱镜部420位于第一区域A1中的部分所占面积比大于棱镜部420位于第二区域A2中的部分所占面积比，且小于棱镜部420位于第三区域A3中的部分所占面积比。因此，当光源300所产生的光线从入光面211进入导光板400后，从靠近入光面211的棱镜结构421射出的出光量能够明显提升，以解决现有技术中容易在入光侧产生亮暗纹的问题，因此可使导光板400的光学面212的出光亮度更均一。
应理解，本实施方式的棱镜结构421、棱镜结构422以及棱镜结构423的结构设计与如图2A及图2B所示的棱镜结构222的结构设计大致上相同，故在此不再赘述。另一方面，本实施方式的棱镜结构421、棱镜结构422以及棱镜结构423的尺寸设计成相同仅用于示范说明。在其他实施例中，棱镜结构421、棱镜结构422以及棱镜结构423的尺寸亦可设计成不同。举例而言，棱镜结构421的宽度可大于棱镜结构422的宽度且小于棱镜结构423的宽度，藉以改变棱镜部420分别位于第一区域A1、第二区域A2以及第三区域A3中的部 分所占面积比，进而控制光线分别从导光板400的第一区域A1、第二区域A2以及第三区域A3的出光量。
请同时参照图4A及图4B，其中，图4A示出了根据本发明的第三实施方式的背光模组的局部示意图，图4B示出了沿着图4A的B-B剖面线所剖切的剖面图。在本实施例中，导光板500的结构与第一实施例的导光板200大致上相同，差异在于导光板500的棱镜部520具有不同的结构设计。在本实施例中，每一个棱镜部520由多个棱镜结构(例如棱镜结构521、棱镜结构522以及棱镜结构523)沿着第二延伸方向D2依次排列形成。其中，棱镜结构521位于第一区域A1中，棱镜结构522位于第二区域A2中，棱镜结构523位于第三区域A3中。
如图4A及图4B所示，在一个实施例中，棱镜结构521、棱镜结构522以及棱镜结构523的结构尺寸与形状实质上相同。其中，位于第一区域A1中沿着第二延伸方向D2的任意两个相邻的棱镜结构521之间具有第一间距S1，位于第二区域A2中沿着第二延伸方向D2的任意两个相邻的棱镜结构522之间具有第二间距S2，以及位于第三区域A3中沿着第二延伸方向D2的任意两个相邻的棱镜结构523之间具有第三间距S3。其中，第二间距S2大于第一间距S1，且第一间距S1大于第三间距S3，藉此可使棱镜部520位于第一区域A1中的部分所占面积比大于棱镜部520位于第二区域A2中的部分所占面积比，且小于棱镜部520位于第三区域A3中的部分所占面积比。因此，当光源300所产生的光线从入光面211进入导光板500后，从靠近入光面211的棱镜结构521射出的出光量能够明显提升，以解决现有技术中容易在入光侧产生亮暗纹的问题，可使导光板500的光学面212的出光亮度更均一。
应理解，本实施方式的棱镜结构521、棱镜结构522以及棱镜结构523的结构设计与如图2A及图2B所示的棱镜结构222的结构设计大致上相同，故在此不再赘述。另一方面，本实施方式的棱镜结构521、棱镜结构522以及棱镜结构523的尺寸设计成相同仅用于示范说明。在其他实施例中，棱镜结构521、棱镜结构522以及棱镜结构523的尺寸亦可设计成不同。举例而言，棱镜结构521的宽度可大于棱镜结构522的宽度且小于棱镜结构523的宽度，藉以改变棱镜部520分别位于第一区域A1、第二区域A2以及第三区域A3的部分所占面积比。在其他实施例中，亦可改变第一区域中A1的棱镜结构521的排 列密集度、位于第二区域A2中的棱镜结构522的排列密集度、以及位于第三区域A3中的棱镜结构523的排列密集度，从而来改变棱镜部520分别位于第一区域A1、第二区域A2以及第三区域A3中的部分所占面积比。
请参照图5，其示出了根据本发明的第四实施方式的背光模组的局部示意图。在本实施例中，导光板600的结构与第一实施例的导光板200大致上相同，差异在于导光板600还包括混光结构601。如图5所示，混光结构601设置在光学面212上，且位于入光面211以及第一区域A1之间。在本实施例中，混光结构601为条状结构，且该条状结构可为从光学面212凸出的凸状部或凹入光学面212的凹陷部。而且，混光结构601沿着第二延伸方向D2延伸。藉此，光源300所射出的光线在进入导光板600后，会先经过混光结构601形成均匀的光线，进而可改善公知导光板在入光侧出现的明显亮暗纹所导致外观不均匀的问题。
应理解，图5的实施例的导光板600的混光结构601搭配棱镜部220仅作为示范说明。在其他实施例中，导光板600的混光结构601亦可搭配如图3所示的棱镜部420或如图4所示的棱镜部520，以产生相同的效果。
应理解，前述的棱镜结构为凸状结构仅用于示范说明。在其他实施例中，棱镜结构亦可为凹状结构。请参照图6，其示出了根据本发明的第五实施方式的背光模组的局部示意图。在本实施例中，导光板700的结构与第一实施例的导光板200大致上相同，差异在于导光板700的棱镜结构721、722及723具有不同的结构设计。在本实施例中，棱镜结构721、722及723为凹陷结构。在一个示范例子中，棱镜结构722包括第一光学面722a以及第二光学面722b。其中，第一光学面722a较靠近入光面211，第二光学面722b较远离入光面211。第一光学面722a相对入光面211倾斜，由此形成从底部延伸至顶部的第一倾角α’。第二光学面722b相对入光面211倾斜，由此形成从底部延伸至顶部的第二倾角β’。在一些实施例中，第一倾角α’小于第二倾角β’。在本实施例中，第一光学面722a与第二光学面722b主要可用来改变光线从棱镜结构722射出的方向。应理解，棱镜结构721及棱镜结构723的结构与棱镜结构722的结构大致上相同，均包括相对入光面211倾斜的第一光学面与第二光学面，以达到改变光指向性的目的，故在此不再赘述。
请同时参照图2B及图6，由于图2B所示的实施例的棱镜结构221、222 及223为凸状部，故光源300射出的大部分光线从入光面211进入导光板200后，会射向第二光学面(例如第二光学面222b)。也就是说，棱镜结构221、222及223的第二光学面为直接受光面。因此，为了达到引导光线的目的，在一些实施例中，棱镜结构221、222及223的第二光学面的面积可大于第一光学面的面积，以提升导光板200的出光效率以及外观的均匀性。另一方面，由于图6所示的实施例的棱镜结构721、722及723为凹陷部，故光源300射出的大部分光线从入光面211进入导光板700后会射向第一光学面(例如第一光学面722a)。也就是说，棱镜结构721、722及723的第一光学面为直接受光面。因此，在结构设计上，棱镜结构721、722及723的第一光学面的面积可大于第二光学面的面积，以提升导光板700的出光效率以及外观的均匀性。
请参照图7，其示出了根据本发明的实施方式的显示装置的装置示意图。本实施方式的显示装置800包括如图2A及图2B所示的背光模组100以及显示面板810。如图7所示，显示面板810设置在背光模组100的导光板200前方，可达到与前述相同的目的，故在此不再赘述。应理解，本申请的实施例以图2A及图2B所示的具有导光板200的背光模组100应用于显示装置800中仅用于示范说明，并非用以限制本发明。前述其他实施例的导光板，例如导光板400、500、600及700亦可应用于显示装置中，以产生同样的效果。
由上述本发明实施方式可知，本发明的导光板具有多个棱镜部，且每一个棱镜部分别在靠近导光板入光面、远离导光板入光面(反入光面)以及导光板的中间所占的面积不同，故可分别控制导光板不同位置处的出光量，进而可提升整体导光板的出光均一度。
虽然本发明已通过实施例进行了如上揭露，然其并非用以限定本发明，任何本领域技术人员，在不脱离本发明的精神和范围内，应当可做出些许更动与润饰，故本发明的保护范围应当以所附的权利要求书所界定的范围为准。
【符号说明】
100   背光模组
200   导光板
210   主体
211   入光面
212   光学面
212a  第一侧
212b  第二侧
220   棱镜部
221   棱镜结构
222   棱镜结构
222a  第一光学面
222b  第二光学面
222c  脊线
223   棱镜结构
300   光源
400   导光板
420   棱镜部
421   棱镜结构
422   棱镜结构
423   棱镜结构
500   导光板
520   棱镜部
521   棱镜结构
522   棱镜结构
523   棱镜结构
600   导光板
601   混光结构
700   导光板
721   棱镜结构
722   棱镜结构
722a  第一光学面
722b  第二光学面
723   棱镜结构
800   显示装置
810   显示面板
A1    第一区域
A2    第二区域
A3    第三区域
D1    第一延伸方向
D2    第二延伸方向
H1    高度
L1    长度
W1    第一宽度
W1’  第一宽度
W2    第二宽度
W2’  第二宽度
W3    第三宽度
W3’  第三宽度
S1    第一间距
S2    第二间距
S3    第三间距
α    第一倾角
α’  第一倾角
β    第二倾角
β’  第二倾角

Claims (11)

  1. 一种导光板，包括：
    主体，其具有互相垂直的第一延伸方向以及第二延伸方向，其中，所述主体包括：
    入光面，其沿着所述第一延伸方向延伸；以及
    光学面，其连接所述入光面，其中，所述光学面具有靠近所述入光面的第一侧以及远离所述入光面的第二侧，其中，所述第二延伸方向平行于所述第一侧朝向所述第二侧的延伸方向，且所述光学面具有沿着所述第二延伸方向依次排列的第一区域、第二区域以及第三区域；以及
    多个棱镜部，其设置在所述光学面上，且每一个所述棱镜部沿着所述第二延伸方向延伸，其中，所述棱镜部位于所述第一区域中的部分所占面积比大于所述棱镜部位于所述第二区域中的部分所占面积比，且小于所述棱镜部位于所述第三区域中的部分所占面积比。
  2. 根据权利要求1所述的导光板，其中，每一个所述棱镜部具有位于所述第一区域的第一宽度、位于所述第二区域的第二宽度、以及位于所述第三区域的第三宽度，且所述第一宽度大于所述第二宽度，且所述第一宽度小于所述第三宽度。
  3. 根据权利要求1所述的导光板，其中，每一个所述棱镜部由多个棱镜结构沿着所述第二延伸方向排列形成，其中，位于所述第一区域中的每一个所述棱镜结构具有第一宽度，位于所述第二区域中的每一个所述棱镜结构具有第二宽度，且位于所述第三区域中的每一个所述棱镜结构具有第三宽度，其中，所述第一宽度大于所述第二宽度，且所述第一宽度小于所述第三宽度。
  4. 根据权利要求1所述的导光板，其中，每一个所述棱镜部由多个棱镜结构沿着所述第二延伸方向排列形成，其中，位于所述第一区域中的所述棱镜结构的排列密集度大于位于所述第二区域中的所述棱镜结构的排列密集度，但小于位于所述第三区域中的所述棱镜结构的排列密集度。
  5. 根据权利要求1所述的导光板，其中，每一个所述棱镜部由多个棱镜结构沿着所述第二延伸方向排列形成，其中，位于所述第一区域中沿着所述第二延伸方向的任意两个相邻的棱镜结构之间具有第一间距，位于所述第二区域中沿着所述第二延伸方向的任意两个相邻的棱镜结构之间具有第二间距，位于所述第三区域中沿着所述第二延伸方向的任意两个相邻的棱镜结构之间具有第三间距，其中，所述第二间距大于所述第一间距，且所述第一间距大于所述第三间距。
  6. 根据权利要求1所述的导光板，其中，每一个所述棱镜部由多个棱镜结构沿着所述第二延伸方向排列形成，每一个所述棱镜结构互相连接。
  7. 根据权利要求1所述的导光板，还包括多个混光结构，其设置在所述光学面上，且所述混光结构位于所述第一侧与所述第一区域之间。
  8. 根据权利要求1所述的导光板，其中，每一个所述棱镜部由多个棱镜结构沿着所述第二延伸方向排列形成，且每一个所述棱镜结构包括：
    第一光学面，其相对所述入光面倾斜，所述第一光学面形成从底部延伸至顶部的第一倾角；以及
    第二光学面，其相对所述入光面倾斜，所述第二光学面形成从底部延伸至顶部的第二倾角，其中，所述第一倾角小于所述第二倾角，且所述第一光学面靠近所述入光面，所述第二光学面远离所述入光面。
  9. 根据权利要求8所述的导光板，其中，每一个所述棱镜结构的所述第一光学面与所述第二光学面的相互连接形成了脊线，且所述脊线实质上平行于所述第一侧。
  10. 一种背光模组，包括：
    根据权利要求1至9中任一项所述的导光板；以及
    光源，其邻设于所述入光面。
  11. 一种显示装置，包括：
    根据权利要求10所述的背光模组；以及
    显示面板，其设置在所述导光板前方。
PCT/CN2017/107761 2017-10-26 2017-10-26 导光板、背光模组及显示装置 WO2019080027A1 (zh)

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CN207301397U (zh) * 2017-10-26 2018-05-01 瑞仪光电股份有限公司 导光板、背光模组及显示装置

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US20190129086A1 (en) 2019-05-02
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TWI629521B (zh) 2018-07-11
CN109964157A (zh) 2019-07-02

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