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Patent Searching and Data


Title:
HEAD-UP DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2016065908
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a head-up display device that can suppress illumination unevenness in a display region of a display element caused by aberration of condensing means.SOLUTION: A head-up display device 100 projects display light L emitted from a display unit 3 comprising a backlight unit 1 and a liquid crystal display element 2 onto a viewing region of an observer by projection means to allow the observer to visually recognize an image represented by the display light L. The backlight unit 1 includes: a light source 10 that emits light I to illuminate the liquid crystal display element 2; a lens array 40 including a plurality of lenses, which divides the light I exiting from the light source 10 to produce a plurality of images of the light source 10; and condensing means 51, 52 that condenses the light I exiting from images of the light source 10 to be matched to the display region of the liquid crystal display element 2. The lens array 40 is configured in such a manner that a light distribution angle of the lens in a peripheral part is different from a light distribution angle of the lens in the center.SELECTED DRAWING: Figure 3

Inventors:
MATSUURA MUNEYA
KAWAI TAKESHI
HARUYAMA YUKI
Application Number:
JP2014193282A
Publication Date:
April 28, 2016
Filing Date:
September 24, 2014
Export Citation:
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Assignee:
NIPPON SEIKI CO LTD
International Classes:
G02B27/01; B60K35/00
Domestic Patent References:
JP2012203176A2012-10-22
JP2010152005A2010-07-08
JP3418985B22003-06-23
JPH09179060A1997-07-11
JPH09179060A1997-07-11
JP2012203176A2012-10-22
JP2010152005A2010-07-08
JP3418985B22003-06-23
Foreign References:
US20130141909A12013-06-06
US20130141909A12013-06-06