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Patent Searching and Data


Title:
VIRTUAL IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/158258
Kind Code:
A1
Abstract:
Provided is a virtual image display device that displays a virtual image by projecting the display light of an image onto a projection unit. This virtual image display device comprises: an image display element that has a portion to be illuminated which has longitudinal dimensions larger than lateral dimensions, and displays an image; and a backlight unit that irradiates the portion to be illuminated with light-source light. The backlight unit is equipped with: a light source unit that has light source elements aligned with each other at predetermined intervals in a longitudinal corresponding direction (XD) which corresponds to the longitudinal direction; and a small light source array lens unit (51) that is disposed on the optical path between the light source unit and the portion to be illuminated and has small light source lens elements (52) arranged at a pitch (PIT) smaller than the predetermined interval along a lateral corresponding direction (YD) which corresponds to the lateral direction. In the small light source lens elements (52), the absolute value of the focal length (fay) in the lateral corresponding direction is smaller than the absolute value of the focal length (fax) in the longitudinal corresponding direction.

Inventors:
YOKOE JUNYA (JP)
Application Number:
PCT/JP2019/050528
Publication Date:
August 06, 2020
Filing Date:
December 24, 2019
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
B60K35/00; G02B3/00; G02B27/01
Foreign References:
JP2016218391A2016-12-22
JP2016057491A2016-04-21
Attorney, Agent or Firm:
JIN Shunji (JP)
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