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    • 3. 发明申请
    • Backlight unit
    • 背光单元
    • US20090147532A1
    • 2009-06-11
    • US12289426
    • 2008-10-28
    • Masato TayaTokutarou KomatsuYasushi SugimotoTadashi OkudaTeruo Teshima
    • Masato TayaTokutarou KomatsuYasushi SugimotoTadashi OkudaTeruo Teshima
    • F21V5/02
    • G02B6/0053G02B6/0038G02B6/0051
    • A backlight unit includes: light guide plate surrounded by main surfaces and end surfaces, one end surface facing a light source designated as entrance surface, one main surface designated as emitting surface; first prism sheet provided above the light guide plate, having first prism columns on a top surface and second prism columns on a bottom surface, each first prism column has first ridge line parallel or perpendicular to the entrance surface, each second prism column has second ridge line extending in a different direction from the first ridge line; second prism sheet provided above the first prism sheet, having third prism columns abutting each other on a top surface, each third prism column has third ridge line extending in a direction different from the first and second ridge lines; and reflection sheet facing the light guide plate below the light guide plate.
    • 背光单元包括:由主表面和端面包围的导光板,面向被指定为入射面的光源的一个端面,被指定为发射面的一个主表面; 第一棱镜片,其设置在导光板的上方,在顶面上具有第一棱镜柱,在底面上具有第二棱镜柱,每个第一棱镜柱具有与入射面平行或垂直的第一棱线,每个第二棱镜柱具有第二棱 线沿与第一脊线不同的方向延伸; 第二棱镜片,其设置在第一棱镜片的上方,具有在顶面上彼此抵接的第三棱镜柱,每个第三棱镜柱具有沿与第一和第二脊线不同的方向延伸的第三棱线; 以及与导光板相对的导光板的反射片。
    • 6. 发明申请
    • SURFACE LIGHT SOURCE DEVICE AND PRISM SHEET
    • US20100220498A1
    • 2010-09-02
    • US11997570
    • 2006-05-15
    • Yasuhiko AwanoTokutaro KomatsuMasato TayaYasushi SugimotoTadashi OkudaTeruo Teshima
    • Yasuhiko AwanoTokutaro KomatsuMasato TayaYasushi SugimotoTadashi OkudaTeruo Teshima
    • F21V7/04
    • G02B6/0053G02B5/045G02B6/0038
    • A surface light source device is disclosed that provides greater light condensation in the frontal direction and higher luminance in comparison to a conventional surface light source device. Disclosed is a surface light source device providing a light source, a light guide having at least one of the side surfaces thereof as an incident surface and an outgoing surface substantially perpendicular to the incident surface, and at least two prism sheets, in which the surfaces formed by the prisms of the prism sheets are arranged so as to face upward, moreover the surfaces of the sides opposing the surfaces formed by the prisms of the prism sheets are arranged substantially parallel to the outgoing surface of the light guide. Further, in this surface light source device the prisms are arranged so as to be substantially parallel to the incident surface of the light guide, the half width of emitted light distribution of the light guide is not greater than 30°, and within a cross-section of the prism of the first prism sheet substantially perpendicular to both the outgoing surface and the incident surface of the light guide, the angle θF1 formed between the oblique side of the light source side and the normal to the outgoing surface of the light guide satisfies expression (1), the angle θB1 between the oblique side of the opposite side to the light source and the normal to the outgoing surface of the light source satisfies expression (2), while within a cross-section of the prism of the i-th prism sheet (where i is an integer not less than 2) arranged on the outgoing surface of the first prism sheet substantially perpendicular to both the outgoing surface and the incident surface of the light guide, the angle θFi between the oblique side of the light source side and the normal to the outgoing surface of the light guide satisfies expression (3) and the angle θBi between the oblique side of the opposite side to the light source and the normal to the outgoing surface of the light source satisfies expression (4), wherein θF1≦φ2  (1), 90°−φ2−φc1≦θB1  (2), θFi≦φ6  (3) and 90°−φ6−φci≦θBi  (4), where in expression (1), φ2=sin1 (n1−1 sin φ1), n1 is the refractive index of the material of which the prism of the first prism sheet is formed, φ1 represents the angle formed between the peak light of light emitted from the light guide and the normal to the outgoing surface of the light guide, in expression (2), φc1 represents the critical angle of the first prism sheet, in expression (3), φ6=sin−1 (ni−1 sin φ5), ni is the refractive index of the material of which the prism of the i-th prism sheet is formed, φ5 represents the angle between the peak light of light emitted from the i−1 prism sheets and the normal to the outgoing surface of the light guide, and in expression 4, φci represents the critical angle of the i-th prism sheet.
    • 7. 发明授权
    • Backlight unit
    • 背光单元
    • US07665876B2
    • 2010-02-23
    • US12289426
    • 2008-10-28
    • Masato TayaTokutarou KomatsuYasushi SugimotoTadashi OkudaTeruo Teshima
    • Masato TayaTokutarou KomatsuYasushi SugimotoTadashi OkudaTeruo Teshima
    • F21V7/04
    • G02B6/0053G02B6/0038G02B6/0051
    • A backlight unit includes: light guide plate surrounded by main surfaces and end surfaces, one end surface facing a light source designated as entrance surface, one main surface designated as emitting surface; first prism sheet provided above the light guide plate, having first prism columns on a top surface and second prism columns on a bottom surface, each first prism column has first ridge line parallel or perpendicular to the entrance surface, each second prism column has second ridge line extending in a different direction from the first ridge line; second prism sheet provided above the first prism sheet, having third prism columns abutting each other on a top surface, each third prism column has third ridge line extending in a direction different from the first and second ridge lines; and reflection sheet facing the light guide plate below the light guide plate.
    • 背光单元包括:由主表面和端面包围的导光板,面向被指定为入射面的光源的一个端面,被指定为发射面的一个主表面; 第一棱镜片,其设置在导光板的上方,在顶面上具有第一棱镜柱,在底面上具有第二棱镜柱,每个第一棱镜柱具有与入射面平行或垂直的第一棱线,每个第二棱镜柱具有第二棱 线沿与第一脊线不同的方向延伸; 第二棱镜片,其设置在第一棱镜片的上方,具有在顶面上彼此抵接的第三棱镜柱,每个第三棱镜柱具有沿与第一和第二脊线不同的方向延伸的第三棱线; 以及与导光板相对的导光板的反射片。