Title:
Head-up display device and its lighting unit
Document Type and Number:
Japanese Patent JP6287605
Kind Code:
B2
Abstract:
An illumination unit includes a plurality of sets of illumination modules each having a light source placed at a conjugate position and a plurality of stages of condenser lenses that collect light from the light source toward a display device, a magnifying optical system being between the conjugate position and a viewing area. Each illumination module set includes an initial stage lens closest to the light source and a final stage lens farthest from the light source. In a surrounding illumination module of the illumination module sets, principal points of all stages of condenser lenses are positioned on a surrounding principal ray that passes through a periphery of an angle of view center of the display device to reach the viewing area, and the light source is positioned on the surrounding principal ray by being offset from a light axis of the initial stage lens in the reference direction.
Inventors:
Takahiro Minamihara
Application Number:
JP2014118742A
Publication Date:
March 07, 2018
Filing Date:
June 09, 2014
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F21V13/02; B60K35/00; F21S2/00; G02B27/01; H04N5/74
Domestic Patent References:
| JP2010277065A | ||||
| JP2012058690A | ||||
| JP2012226301A | ||||
| JP2006019027A | ||||
| JP2011090217A |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo
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