WO2018166007A1 - 一种出光率高且光面均匀、无视觉斑点的导光板 - Google Patents

一种出光率高且光面均匀、无视觉斑点的导光板 Download PDF

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WO2018166007A1
WO2018166007A1 PCT/CN2017/079693 CN2017079693W WO2018166007A1 WO 2018166007 A1 WO2018166007 A1 WO 2018166007A1 CN 2017079693 W CN2017079693 W CN 2017079693W WO 2018166007 A1 WO2018166007 A1 WO 2018166007A1
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Prior art keywords
light
guide plate
light guide
sides
uniform
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PCT/CN2017/079693
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English (en)
French (fr)
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徐向阳
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江苏日月照明电器有限公司
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Publication of WO2018166007A1 publication Critical patent/WO2018166007A1/zh

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

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  • the invention belongs to the technical field of light guide plates, and particularly relates to a light guide plate with high light extraction rate, uniform light surface and no visual spots.
  • the light guide plate is a key optical device of the flat lamp, and its function is to introduce the light emitted by the side light source through the light guide plate, and the light entering direction from the side of the light guide plate, through incidence, refraction, reflection, diffuse reflection, etc.
  • a plurality of changes in light become direct illumination with respect to the plane of the panel light, and are emitted from the front surface of the light guide plate to generate an illumination function to illuminate the surrounding environment.
  • a plurality of ink dots are printed by screen printing, and these dots are the dots of the light guide plate.
  • the light-emitting surface (exit surface) of the conventional light guide plate is often adhered to dust.
  • the light surface (exit surface) is observed, and small white spots, bright spots, spots, etc. often appear, resulting in uniform light surface. , affecting both appearance and light output.
  • the existing light guide plate gaps are uniform in size, and the light rays are continuously scattered on the mesh points on the propagation path, the luminous flux in the direction of the symmetrical center line of the light guide plate is gradually attenuated, so that the light extraction rate is low and The light emitted is not uniform.
  • the object of the present invention is to overcome the defects of the prior art and provide a white point, a bright spot, a spot, etc., which are not observed on the undulating surface even if dust adheres to the undulating surface of the light guide plate, thereby ensuring the beautiful appearance of the lamp. And does not affect the light extraction rate; the dot density increases from the two sides toward the center, greatly increasing the scattering area of the dots, and the emitted light is a uniform light guide plate with high light extraction rate, uniform smooth surface and no visual spots.
  • a light guide plate with high light extraction rate and uniform smooth surface and no visual spots which comprises a light guide plate, and a pair of opposite sides of the light guide plate are light source sides, and the light guide plate
  • the scattering surface is a smooth surface and is densely covered with a plurality of dots
  • the exit surface of the light guide plate is a undulating surface which is a cos-curve periodic undulation
  • the two light source sides are located at both ends of the undulating surface in the undulating direction
  • the spacing of two adjacent dots in the incident direction is gradually reduced from the center line of the two light source sides to the light guide plate.
  • the invention injects light from the sides of the two light sources, scatters them through the respective mesh points on the smooth surface, and then scatters them from the undulating surface. Since the undulating surface is wavy, the scattered light can be further redirected, and the light is further spread to the periphery and outward, so that even if dust adheres to the undulating surface of the light guide plate, the undulating surface is not observed.
  • the white spots, bright spots, spots, etc. ensure the beautiful appearance of the lamps and do not affect the light extraction rate.
  • the distance between adjacent two mesh points in the direction of light incident on both sides is gradually reduced from the center line of the light guide plate from the two light source sides, which corresponds to the dot density increasing from the both sides toward the center, which greatly increases the dot.
  • the scattering area is therefore high. Even if the luminous flux in the direction of the symmetry center line of the light guide plate is gradually attenuated, since the dot density increases from the both sides toward the center, the emitted light is emitted. The line will be very uniform.
  • the diameters of two adjacent mesh points in the light incident directions on both sides gradually increase from the edge of the two light sources to the center line of the light guide plate; further increasing the scattering area of the mesh dots, and the light extraction rate is higher.
  • the distance between the two highest peaks of the undulating surface is 2.5-4.5 micrometers
  • the vertical distance between the peaks and the troughs is 0.5-2.5 micrometers
  • the light-emitting effect is better
  • the uniformity is higher
  • the light-emitting rate is higher.
  • the material of the light guide plate is acrylic plexiglass, PS plastic or MS plastic, which is convenient for screen printing dot or laser engraving.
  • the undulating surface is wavy, the scattered light can be further redirected, and the light is further spread to the periphery and outward, so that even if dust adheres to the undulating surface of the light guide plate, no undulation is observed.
  • White spots, bright spots, spots, etc. on the surface ensure the beautiful appearance of the lamps and do not affect the light extraction rate;
  • 1 is a three-dimensional schematic view of a light guide plate with high light extraction rate and uniform smooth surface and no visual spots;
  • FIG. 2 is a three-dimensional schematic view of a light guide plate with high light extraction rate and uniform smooth surface and no visual spots according to the present invention
  • FIG. 3 is a plan view showing the overall structure of a light guide plate having a high light extraction rate and a uniform light surface and no visual spots according to the present invention.
  • a specific embodiment of a light guide plate with high light-emitting rate and uniform smooth surface and no visual spots includes a light guide plate, and a pair of opposite sides of the light guide plate are light source sides.
  • the scattering surface of the light guide plate is a smooth surface 1 and is densely covered with a plurality of mesh points
  • the exit surface of the light guide plate is a undulating surface 2 which is a cos-curve periodic undulation
  • the two light source sides 3 are located in the undulating direction of the undulating surface 2 Both ends;
  • the spacing between adjacent two dots in the direction of light incident on both sides is gradually reduced from the center line of the two light source edges 3 to the light guide plate, respectively.
  • the light after the light is incident on the two light source sides 3, they are scattered on the respective mesh points on the smooth surface 1 and then scattered from the undulating surface 2. Since the undulating surface 2 is wavy, the scattered light can be further redirected, and the light is further spread to the periphery and outward, so that even if dust adheres to the undulating surface 2 of the light guide plate, no undulation is observed.
  • the white spots, bright spots, spots, etc. on the surface 2 ensure the beautiful appearance of the lamp and do not affect the light extraction rate.
  • the distance between adjacent two mesh points in the light incident direction on both sides is gradually reduced from the center line of the two light source edges 3 to the light guide plate, which corresponds to the dot density increasing from the both sides toward the center, which greatly increases The scattering area of the dots, so the light extraction rate is high. Even if the luminous flux in the direction of the symmetry center line of the light guide plate is gradually attenuated, since the dot density increases from both sides toward the center, the emitted light is very uniform.
  • the diameters of two adjacent dots in the light incident directions on both sides gradually increase from the two light source sides 3 to the center line of the light guide plate; further increase the scattering area of the dots, and the light output rate is further increased. high.
  • the distance between the two highest peaks of the undulating surface 2 is 2.5-4.5 micrometers, and the vertical distance between the peaks and the troughs is 0.5-2.5 micrometers, and the light-emitting effect is better, more uniform, and the light-emitting rate is higher.
  • the material of the light guide plate is acrylic plexiglass, PS plastic or MS plastic, which is convenient for screen printing dot or laser engraving.
  • each light source edge 3 is provided with a first order on the center line of the light guide plate.
  • 1-155 dot such as the dot diameter value of Table 1 below.
  • the light is uniform and the light extraction rate is high.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种出光率高且光面均匀、无视觉斑点的导光板，导光板的一对相对设置的两边为光源边（3），导光板的散射面为光滑面（1）且密布有多个网点，导光板的出射面为呈cos曲线状周期性起伏的起伏面（2），两个光源边（3）位于起伏面（2）在起伏方向上的两端；在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边（3）向导光板的中心线逐步减小。即使导光板的起伏面（2）上粘附有灰尘，也不会被观察到起伏面（2）上的白点、亮点、斑点等，保证了灯具美观，且不影响出光率；网点密度由两侧向中央增大，大大增加了网点的散射面积，因此出光率高，射出的光线十分均匀。

Description

一种出光率高且光面均匀、无视觉斑点的导光板 技术领域
本发明属于导光板技术领域，具体涉及一种出光率高且光面均匀、无视觉斑点的导光板。
背景技术
导光板是平板灯的关键光学器件，它的作用是把侧发光的光源所发出的光，经过导光板的导入，从导光板侧向的进光方向，经过入射、折射、反射、漫反射等多次光线变化，变成相对于平板灯平面的直向发光，从导光板的正面出射，从而产生照明功能，照亮周围环境。为了实现导光功能，在导光板两个光滑的表面，在其中的一面上，通过丝网印刷的办法，印刷了很多颗油墨圆点，这些圆点，就是导光板的网点。传统结构的导光板的出光面(出射面)常粘附有灰尘，因此在在灯具点亮后，观察出光面(出射面)，经常出现小的白点、亮点、斑点等，导致光面部均匀，既影响外观，又影响出光率。此外，由于现有的导光板间隙大小一致，而光线在传播路径上的网点上不断被散射而出，因此在射向导光板的对称中心线的方向上的光通量逐渐衰减，从而出光率较低且射出的光线并不均匀。
发明内容
本发明的目的是克服现有技术存在的缺陷，提供一种即使导光板的起伏面上粘附有灰尘，也不会被观察到起伏面上的白点、亮点、斑点等，保证了灯具美观，且不影响出光率；网点密度由两侧向中央增大，大大增加了网点的散射面积，射出的光线十分均匀的出光率高且光面均匀、无视觉斑点的导光板。
本发明解决其技术问题所采用的技术方案是：一种出光率高且光面均匀、无视觉斑点的导光板，其包括导光板，导光板的一对相对设置的两边为光源边，导光板的散射面为光滑面且密布有多个网点，导光板的出射面为呈cos曲线状周期性起伏的起伏面，两个光源边位于起伏面在起伏方向上的两端；在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边向导光板的中心线逐步减小。
本发明从两光源边射入光线后，经光滑面上的各个网点上散射后，从起伏面上散射出去。由于起伏面呈波浪形，因此散射的光线可进一步地再改变方向，光线进一步地向四周、向外扩散，因此即使导光板的起伏面上粘附有灰尘，也不会被观察到起伏面上的白点、亮点、斑点等，保证了灯具美观，且不影响出光率。又由于在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边向导光板的中心线逐步减小，相当于网点密度由两侧向中央增大，大大增加了网点的散射面积，因此出光率高。即使在射向导光板的对称中心线的方向上的光通量逐渐衰减，但由于网点密度由两侧向中央增大，因此射出的光 线会十分均匀。
具体地，在两侧的光线射入方向上的相邻两个网点的直径从两个光源边处至导光板的中心线上逐步增大；进一步增大了网点的散射面积，出光率更高。
优选地，起伏面的相邻两个波峰最高点距离为2.5-4.5微米，波峰与波谷垂直距离为0.5-2.5微米，出光效果更佳，更均匀，出光率更高。
进一步地，导光板的材料为亚克力有机玻璃、PS塑料或MS塑料，方便丝网印刷网点或激光雕刻。
本发明的一种出光率高且光面均匀、无视觉斑点的导光板的有益效果是：
1.由于起伏面呈波浪形，因此散射的光线可进一步地再改变方向，光线进一步地向四周、向外扩散，因此即使导光板的起伏面上粘附有灰尘，也不会被观察到起伏面上的白点、亮点、斑点等，保证了灯具美观，且不影响出光率；
2.又由于在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边向导光板的中心线逐步减小，相当于网点密度由两侧向中央增大，大大增加了网点的散射面积，因此出光率高；
3.即使在射向导光板的对称中心线的方向上的光通量逐渐衰减，但由于网点密度由两侧向中央增大，因此射出的光线会十分均匀。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1是本发明的一种出光率高且光面均匀、无视觉斑点的导光板的三维示意图一；
图2是本发明的一种出光率高且光面均匀、无视觉斑点的导光板的三维示意图二；
图3是本发明的一种出光率高且光面均匀、无视觉斑点的导光板的整体结构俯视图。
其中:1.光滑面；2.起伏面；3.光源边。
具体实施方式
现在结合附图对本发明作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本发明的基本结构，因此其仅显示与本发明有关的构成。
如图1-图3所示的本发明的一种出光率高且光面均匀、无视觉斑点的导光板的具体实施例，其包括导光板，导光板的一对相对设置的两边为光源边3，导光板的散射面为光滑面1且密布有多个网点，导光板的出射面为呈cos曲线状周期性起伏的起伏面2，两个光源边3位于起伏面2在起伏方向上的两端；在 两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边3向导光板的中心线逐步减小。
本实施例从两光源边3射入光线后，经光滑面1上的各个网点上散射后，从起伏面2上散射出去。由于起伏面2呈波浪形，因此散射的光线可进一步地再改变方向，光线进一步地向四周、向外扩散，因此即使导光板的起伏面2上粘附有灰尘，也不会被观察到起伏面2上的白点、亮点、斑点等，保证了灯具美观，且不影响出光率。又由于在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边3向导光板的中心线逐步减小，相当于网点密度由两侧向中央增大，大大增加了网点的散射面积，因此出光率高。即使在射向导光板的对称中心线的方向上的光通量逐渐衰减，但由于网点密度由两侧向中央增大，因此射出的光线会十分均匀。
具体地，在两侧的光线射入方向上的相邻两个网点的直径从两个光源边3处至导光板的中心线上逐步增大；进一步增大了网点的散射面积，出光率更高。
优选地，起伏面2的相邻两个波峰最高点距离为2.5-4.5微米，波峰与波谷垂直距离为0.5-2.5微米，出光效果更佳，更均匀，出光率更高。
进一步地，导光板的材料为亚克力有机玻璃、PS塑料或MS塑料，方便丝网印刷网点或激光雕刻。
优选地，每个光源边3处至导光板的中心线上依次设有第 1-155网点，如下述表1的网点直径值。
表1.第1-155网点的直径值表
网点序号 网点直径mm
1 1.0546
2 1.0574
3 1.0601
4 1.0629
5 1.0656
6 1.0684
7 1.0712
8 1.0739
9 1.0767
10 1.0795
11 1.0822
12 1.085
13 1.0877
14 1.0933
15 1.096
16 1.0988
17 1.1015
18 1.1071
19 1.1098
20 1.1153
21 1.1181
22 1.1209
23 1.1236
24 1.1264
25 1.1319
26 1.1347
27 1.1374
28 1.1402
29 1.1429
30 1.1485
31 1.1512
32 1.154
33 1.1568
34 1.1623
35 1.165
36 1.1678
37 1.1733
38 1.1761
39 1.1788
40 1.1816
41 1.1871
42 1.1899
43 1.1926
44 1.1982
45 1.2009
46 1.2064
47 1.2092
48 1.212
49 1.2175
50 1.2202
51 1.2258
52 1.2285
53 1.2313
54 1.2368
55 1.2396
56 1.2451
57 1.2479
58 1.2534
59 1.2561
60 1.2617
61 1.2644
62 1.2699
63 1.2755
64 1.2782
65 1.2837
66 1.2865
67 1.292
68 1.2976
69 1.3003
70 1.3058
71 1.3114
72 1.3141
73 1.3196
74 1.3252
75 1.3279
76 1.3334
77 1.339
78 1.3417
79 1.3472
80 1.3528
81 1.3583
82 1.361
83 1.3666
84 1.3721
85 1.3776
86 1.3804
87 1.3859
88 1.3914
89 1.3969
90 1.4025
91 1.4052
92 1.4107
93 1.4163
94 1.4218
95 1.4273
96 1.4301
97 1.4356
98 1.4411
99 1.4466
100 1.4522
101 1.4549
102 1.4604
103 1.466
104 1.4715
105 1.477
106 1.4798
107 1.4853
108 1.4908
109 1.4963
110 1.4991
111 1.5046
112 1.5101
113 1.5156
114 1.5184
115 1.5239
116 1.5295
117 1.5322
118 1.5377
119 1.5433
120 1.546
121 1.5515
122 1.5543
123 1.5598
124 1.5626
125 1.5681
126 1.5709
127 1.5764
128 1.5791
129 1.5819
130 1.5874
131 1.5902
132 1.5929
133 1.5957
134 1.5985
135 1.604
136 1.6068
137 1.6095
138 1.6123
139 1.615
140 1.6178
141 1.6206
142 1.6233
143 1.6261
144 1.6261
145 1.6288
146 1.6288
147 1.6316
148 1.6316
149 1.6344
150 1.6344
151 1.6344
152 1.6344
153 1.6371
154 1.6371
155 1.6371
本实施例的上述网点布置后，光线均匀，出光率高。
应当理解，以上所描述的具体实施例仅用于解释本发明，并不用于限定本发明。由本发明的精神所引伸出的显而易见的变化或变动仍处于本发明的保护范围之中。

Claims (4)

  1. 一种出光率高且光面均匀、无视觉斑点的导光板，其特征在于：包括导光板，所述导光板的一对相对设置的两边为光源边(3)，所述导光板的散射面为光滑面(1)且密布有多个网点，所述导光板的出射面为呈cos曲线状周期性起伏的起伏面(2)，两个光源边(3)位于起伏面(2)在起伏方向上的两端；在两侧的光线射入方向上的相邻两个网点的间距分别从两个光源边(3)向导光板的中心线逐步减小。
  2. 根据权利要求1所述的一种出光率高且光面均匀、无视觉斑点的导光板，其特征在于：在两侧的光线射入方向上的相邻两个网点的直径从两个光源边(3)处至导光板的中心线上逐步增大。
  3. 根据权利要求2所述的一种出光率高且光面均匀、无视觉斑点的导光板，其特征在于：所述起伏面(2)的相邻两个波峰最高点距离为2.5-4.5微米，波峰与波谷垂直距离为0.5-2.5微米。
  4. 根据权利要求1-3中任一项所述的一种出光率高且光面均匀、无视觉斑点的导光板，其特征在于：所述导光板的材料为亚克力有机玻璃、PS塑料或MS塑料。
PCT/CN2017/079693 2017-03-17 2017-04-07 一种出光率高且光面均匀、无视觉斑点的导光板 WO2018166007A1 (zh)

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