バックライト用反射鏡

Reflection mirror for backlight

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the brightness irregularity caused because a part of a double semi-ellipse is missing. <P>SOLUTION: The reflection mirror 3 for backlight has such a shape that two semi-ellipses prepared by dividing contours of two ellipses 31, 32 which jointly own one focus 10 with a straight line containing the owned focus 10 and other two focuses 21, 22 are arranged side by side, wherein a protrusion part 34 is disposed so as to cover an intersection 37 of two divided semi-ellipses. The brightness is uniformized by directing reflection light 54 to the boundary position 61 with the protrusion part 34. <P>COPYRIGHT: (C)2007,JPO&INPIT
【課題】2連半楕円の一部が欠けているために起きる輝度ムラを解消する。 【解決手段】バックライト用反射鏡3は、1つの焦点10を共有する2つの楕円31,32の輪郭を、共有する焦点10と他の2つの焦点21,22を含む直線で分割した2つの半楕円を並べた形状で、分割された2つの半楕円の交点37を覆うように突起部34を設ける。この突起部34により、境界位置61に反射光54を指向させることで、輝度を均一化させる。 【選択図】図1

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Patent Citations (2)

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    JP-2000227625-AAugust 15, 2000Minolta Co Ltd, ミノルタ株式会社Flash light emitting device
    JP-2005024746-AJanuary 27, 2005Stanley Electric Co Ltd, スタンレー電気株式会社バックライト用反射鏡

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