ILLUMINATION LENS, ILLUMINATION UNIT, AND HEAD-UP DISPLAY DEVICE

Japanese Patent JP2015133304

A

PROBLEM TO BE SOLVED: To provide an illumination lens capable of suppressing illuminance irregularity in illumination by emitted light.SOLUTION: An illumination lens 4 illuminating a display unit by condensing rays from a light source 3 and emitting the condensed rays to the display unit comprises: a plurality of first lens surface sections 40 each formed into a shape extracted partially from a first virtual lens surface having the light source 3 arranged on a first optical axis L1 and capable of second derivative between optical axes L1 and L2 aligned in a reference direction X as a virtual lens surface defining the first optical axis L1 by setting the first optical axis L1 to be eccentric from the second optical axis L2 in the reference direction X; and a plurality of second lens surface sections 41 each formed into a shape extracted partially from a second virtual lens surface capable of at least first derivative between the optical axes L1 and L2 aligned in the reference direction X as a virtual lens surface defining the second optical axis L2, the second lens surface sections 41 being arranged in the reference direction X to alternate with the first lens surface sections 40.

WO/2015/183684	WALL WASH LIGHTING SYSTEM
WO/2022/007690	ILLUMINATION DEVICE
WO/2014/170746	LED-LUMINAIRE

NAMBARA TAKAHIRO

JP2014005371A

July 23, 2015

January 15, 2014

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DENSO CORP

F21V5/04; F21S2/00; G02B3/06; G02B3/08; G02B19/00; G02B27/01; H04N5/64

JP2009258621A	2009-11-05
JP2009109780A	2009-05-21
JP2009169399A	2009-07-30
JP2008311032A	2008-12-25
JP2002352611A	2002-12-06
JP2012032536A	2012-02-16
JP2009175597A	2009-08-06

Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo

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