Title:
ヘッドアップディスプレイ装置及びその照明ユニット
Document Type and Number:
Japanese Patent JP6575616
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a compact illumination unit for illuminating a wide area of a display device at high illumination efficiency in a HUD device.SOLUTION: An illumination unit 2 comprises a plurality of sets of illumination units 26 lined up in a reference direction X, each of the sets of illumination units 26 comprising: a light source 20 arranged at a position Pl conjugate with a visual area across a magnifying optical system; and a plurality of stages of condensing lenses 21 that condense light from the light source 20 towards a display unit. Each of the sets of illumination units 26 includes: an initial-stage lens 22 as a condensing lens 21 most adjacent to the light source 20; and a final-stage lens 24 as a condensing lens 21 furthest away from the light source 20. When a combined focal point Pc for a combined lens being a combination of all stages of the condensing lenses 21 from the initial-stage lens 22 to the final-stage lens 24 is assumed in each of the sets of illumination units 26, a main plane 224 of the initial-stage lens 22 has a gap Gl between the same and the light source 20 that is set to equal to or smaller than a gap Gc between the same and the combined focal point Pc.SELECTED DRAWING: Figure 3
Inventors:
Takahiro Minamihara
Application Number:
JP2018013730A
Publication Date:
September 18, 2019
Filing Date:
January 30, 2018
Export Citation:
Assignee:
株式会社デンソー
International Classes:
G02B27/01; B60K35/00; F21S2/00; F21V5/04; G02B3/00; G02B3/06; G02B3/08
Domestic Patent References:
| JP2018078122A | ||||
| JP2007108429A | ||||
| JP2012203176A | ||||
| JP2013164512A | ||||
| JP2008068766A | ||||
| JP2007172997A | ||||
| JP2012163613A |
Foreign References:
| WO2015107883A1 | ||||
| WO2005066688A1 |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo