公开(公告)号：US5528709A

公开(公告)日：1996-06-18

申请号：US441963

申请日：1995-05-16

申请人： Yasuhiro Koike ,  Kayoko Watai

发明人： Yasuhiro Koike ,  Kayoko Watai

IPC分类号： G02B6/00 ,  F21V8/00 ,  G02B6/42 ,  G02F1/1335 ,  G02F1/13357 ,  G02B6/12 ,  F21V7/04 ,  G02B6/10

CPC分类号： G02B6/0041 ,  G02B6/0065 ,  G02B6/0068 ,  G02B6/4298 ,  G02B6/0021 ,  G02B6/0073 ,  Y10S385/901

摘要： A corner supply type plane light source device having a simple structure and capable of forming a uniform luminescent part with a small power consumption is disclosed. The corner supply type plane light source device comprises a flat-plate light-scattering light guide 1, diffusion reflective sheets 2, 4, and LEDs 3 disposed at corners. The light-scattering light guide 1 is composed of a material provided with a uniform scattering power, and the effective scattering irradiation parameter E and the correlation distance a satisfy the conditions of 9.ltoreq.E[cm.sup.-1 ].ltoreq.100 and 0.06.ltoreq.a[.mu.m].ltoreq.35. Turning on the LEDs 3, light is supplied from each corner. The LED radiation light having directivity immediately undergoes the scattering in the light-scattering light guide 1 and the propagation direction is expanded in the lateral and vertical directions, and also undergoes the internal reflection on the bottom 12 and sides 13, and diffusion reflection by the diffusion reflective sheets 2, 4. As a result, the light propagates throughout the entire light-scattering light guide 1. The light surpassing the critical conditions on the light exit surface 11 through this process is emitted from the light exit surface 11 to provide a light flux F. (Representative drawing) FIG. 4

摘要翻译： 公开了具有简单结构并且能够形成具有小功耗的均匀发光部分的角供电型平面光源装置。 角供应型平面光源装置包括平角光散射光导1，扩散反射片2,4和设置在角部的LED 3。 光散射光导1由具有均匀散射功率的材料构成，有效散射照射参数E和相关距离a满足条件9 [E] [cm -1]≤100， 0.06

公开(公告)号：US06309080B1

公开(公告)日：2001-10-30

申请号：US08622204

申请日：1996-03-27

申请人： Hiromi Sasako ,  Kayoko Watai

发明人： Hiromi Sasako ,  Kayoko Watai

IPC分类号： G02F1335

CPC分类号： G02B6/0053 ,  F21V5/02 ,  F21Y2105/00 ,  G02B6/0041 ,  G02F1/133615

摘要： A surface light source device has a narrowed visual field and increased brightness. The surface light source device can be applied to a liquid crystal display. The back side of a fluorescent lamp is covered with silver foil. Light emitted from the lamp enters a wedge-shaped light guide plate through its incident surface. The light guide plate is designed so that directional light exits from the guide plate. When the light is guided toward a thin-walled end surface through the light guide plate, the light is scattered, reflected, and undergoes other action. Collimated light flux gradually exits from the exiting surface. The light flux passes through two prism sheets successively. As a result, the direction of propagation of the light is restricted in two dimensions. The light flux of increased brightness is directed to the liquid crystal panel. V-shaped channels formed in the prism faces of the two prism sheets PS1, PS2 are arrayed in two mutually perpendicular directions while facing outward. The prismatic vertical angles of the two sheets PS1, PS2 have various desirable combinations of values. For example, where the first sheet PS1 is disposed vertical to the lamp, the vertical angles of the two sheets PS1, PS2 are preferably 90° and 70°, respectively.

摘要翻译： 表面光源装置的视野变窄，亮度增加。 表面光源装置可以应用于液晶显示器。 荧光灯的背面用银箔覆盖。 从灯发出的光通过其入射面进入楔形导光板。 导光板被设计成使得定向光从导板排出。 当光通过导光板被引向薄壁端面时，光被散射，反射并经历其他动作。 准直光通量从出射表面逐渐退出。 光通量依次通过两个棱镜片。 结果，光的传播方向在二维上受到限制。 增加亮度的光通量指向液晶面板。 形成在两个棱镜片PS1，PS2的棱镜面中的V形通道在两个相互垂直的方向上排列，同时面向外。 两个片材PS1，PS2的棱镜垂直角度具有各种所需的值组合。 例如，在第一片PS1垂直于灯配置的情况下，两片PS1，PS2的垂直角分别优选为90°，70°。

公开(公告)号：US5961197A

公开(公告)日：1999-10-05

申请号：US762802

申请日：1996-12-09

申请人： Kayoko Watai ,  Hiromi Sasako

发明人： Kayoko Watai ,  Hiromi Sasako

IPC分类号： F21V8/00 ,  G02B6/00

CPC分类号： G02B6/0016 ,  G02B6/0025 ,  G02B6/0061

摘要： A wedge-shaped light scattering guide plate 10 employed in a surface light source device of side-light type has a width equal to the length of a primary light source element. An incidence end surface 11 is formed as a matte surface (rough surface) by a matting process. The incidence end surface 11 is provided with roughness which is uniform or increases toward end portions. The roughened incidence end surface 11 produces scattered light in the vicinity of the incidence end surface, especially at both side end portions. The scattered light contributes to elimination of variation in luminance which tends to occur in the vicinity of the incidence end surface 11. A light diffusing plate may be interposed between the primary light source element and the light scattering guide plate.

摘要翻译： 在侧光型面光源装置中使用的楔形光散射导向板10的宽度等于一次光源元件的长度。 入射端面11通过消光处理形成为无光泽表面（粗糙表面）。 入射端面11具有均匀的粗糙度或朝向端部增加的粗糙度。 粗糙化的入射端面11在入射端面附近产生散射光，特别是在两侧端部。 散射光有助于消除倾向于在入射端面11附近发生的亮度变化。光扩散板可以插入在一次光源元件和光散射导向板之间。

公开(公告)号：US5788356A

公开(公告)日：1998-08-04

申请号：US622161

申请日：1996-03-27

申请人： Kayoko Watai ,  Kayoko Masaki ,  Hiromi Sasako

发明人： Kayoko Watai ,  Kayoko Masaki ,  Hiromi Sasako

IPC分类号： G02B6/00 ,  F21V8/00 ,  G02F1/1335 ,  G02F1/13357

CPC分类号： G02B6/0031 ,  G02B6/0023 ,  G02B6/0025 ,  G02B6/0053

摘要： In a surface light source device of side light type, occurrence of irregularities in luminance is prevented in the vicinity of an incidence surface 10 of a light guide plate 1. A light source element 2 is disposed on a lateral side of the light guide plate 1 and the light introduced into the light guide plate 1 through the incidence surface 10 is emitted through an emission surface 11. The light comes outside after undergoing the action of an additional element 3 (such as a priority traveling direction correcting action) and is applied to, for example, back lighting in a liquid crystal display. A reflection sheet such as a silver foil is disposed along a rear surface 12. The rear surface 12 is treated in various manners in order to reflect the light toward the emission surface 11. Another reflection sheet 20 is disposed as a reflector surrounding the light source element 2 from the back side. A case 4 partially projects inward along the incidence surface 10 to form light shielding walls 8, 9. The shielding walls 8, 9 are adapted to prevent light emitted from the light source element 2 from intruding through gaps G1 to G4 between the elements, or through an end surface of an end edge portion 3a of the additional element.

摘要翻译： 在侧光型的面光源装置中，在导光板1的入射面10附近防止亮度的不均匀的发生。光源元件2设置在导光板1的侧面 并且通过入射表面10引入导光板1的光通过发射表面11发射。光在经受附加元件3的作用（诸如优先行进方向校正动作）之后进入外部并被应用于 ，例如在液晶显示器中的后照明。 沿着背面12设置银箔等反射片。为了将光反射到发光面11，背面12以各种方式进行处理。另外，反射片20被设置为围绕光源的反射器 元件2从背面。 壳体4沿着入射面10部分地向内突出以形成遮光壁8,9。屏蔽壁8,9适于防止从光源元件2发射的光侵入元件之间的间隙G1至G4，或 通过附加元件的端缘部分3a的端表面。