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    • 26. 发明授权
    • Illuminating lens, lighting device, surface light source, and liquid crystal display apparatus
    • 照明透镜,照明装置,表面光源和液晶显示装置
    • US08773616B2
    • 2014-07-08
    • US13058143
    • 2010-08-06
    • Tomoko IiyamaSyunsuke KimuraDaizaburo Matsuki
    • Tomoko IiyamaSyunsuke KimuraDaizaburo Matsuki
    • G02F1/1335G02B6/32
    • F21V5/04F21Y2115/10G02B19/0014G02B19/0061G02B27/0955
    • An illuminating lens (1) includes a light entrance surface (11), a light exit surface (12), and a bottom surface (13). The light entrance surface (11) has a first light entrance surface (111) and a second light entrance surface (112). The first light entrance surface (111) is a curved surface convex toward the light exit surface (12) and perpendicularly intersecting an optical axis A, and the second light entrance surface (112) extends outwardly from an edge of the first light entrance surface (111) and is connected obliquely to an inner edge of the bottom surface (13). In a cross section in a light spreading direction, θ1 has a negative value at the first light entrance surface (111) and a positive value at the second light entrance surface (112), where θ1 is a refraction angle at which virtual light reaching the light entrance surface (11) directly from a starting point Q on the optical axis A corresponding to a position of a light source (20) passes through the light entrance surface (11), and θ1 is defined as negative when θ1 is on the side of the optical axis A with respect to a normal N to the light entrance surface (11) and as positive when θ1 is on the opposite side.
    • 照明透镜(1)包括光入射表面(11),光出射表面(12)和底表面(13)。 光入射面(11)具有第一光入射面(111)和第二光入射面(112)。 第一光入射面(111)是向光出射面(12)凸出并与光轴A垂直相交的弯曲面,第二光入射面(112)从第一光入射面 111)并且倾斜地连接到底表面(13)的内边缘。 在光扩散方向的横截面中,在第一光入射面(111)处具有负值,在第二光入射面(112)处具有正值,其中θ是折射角,在该角度处 从与光源(20)的位置相对应的光轴A上的起点Q直接到达光入射面(11)的虚拟光通过光入射面(11),< 当光轴A相对于光入射表面(11)的法线N处于光轴A的一侧时,当θ为相对侧时为正。
    • 28. 发明申请
    • SURFACE LIGHT SOURCE DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND LENS
    • 表面光源装置,液晶显示装置和透镜
    • US20120287375A1
    • 2012-11-15
    • US13203851
    • 2011-02-01
    • Daizaburo MatsukiTomoko IiyamaMasahiro Kasano
    • Daizaburo MatsukiTomoko IiyamaMasahiro Kasano
    • G02F1/1335F21V5/04H01L33/58
    • G02B19/0066F21V5/04F21Y2115/10G02B19/0014G02F1/133603G02F1/133605G02F2001/133607
    • The present invention relates to a surface light source, including a light source section made up of plural light emitting diodes and lenses that expand light from these light emitting diodes. The lens in the light source section has a light incident surface on which light from the light emitting diode is incident with an optical axis at a center, and a light exit surface that expands and emits the incident light. The light incident surface has a continued depressed surface, while the light exit surface has a continued projected surface. The lens performs such that “sag Y” decreases from a maximum value “sag Y0” with an increment of “θi”, where θi is an angle included between a straight line, connecting an arbitrary point on the light exit surface and a base point on the optical axis which corresponds to a position of the light emitting diode, and the optical axis; sag Y is a distance measured in a light axis direction from the base point on the optical axis to the arbitrary point on the light exit surface; and “sag Y0” is a value of sag Y when angle θi is 0 (zero) degree, and wherein the light exit surface except a vicinity of the optical axis takes a shape satisfying a relation of 10 degrees
    • 本发明涉及一种面光源,包括由多个发光二极管构成的光源部分和从这些发光二极管扩展光的透镜。 光源部分中的透镜具有光入射表面,来自发光二极管的光以其中心的光轴入射,并且光出射面扩张并发射入射光。 光入射表面具有持续的凹陷表面,而光出射表面具有连续的突出表面。 透镜进行使得凹陷Y以最大值sag Y0减小,增量为&amp; Thetas; i,其中&amp; It; i是包括在直线之间的角度,连接光出射表面上的任意点和 对应于发光二极管的位置的光轴和光轴; 下垂Y是从光轴的基点到光出射面的任意点的光轴方向测定的距离; 并且下垂Y0是当角度&amp;θ; i为0(零)度时的sag Y的值,并且其中除光轴附近之外的光出射表面具有满足关系10度<&amp; t; min <30度的形状 ,其中&thetas;我采用最小值,即&thetas; min,在包括光轴的截面图中的光出射表面上的微小部分的曲率C为最小值。