Title:
PRISM GROUP AND PROJECTION-TYPE VIDEO DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/075748
Kind Code:
A1
Abstract:
This prism group according to the present disclosure includes a first prism, a second prism, a third prism, and a support member that can support the first, second and third prisms so that the prisms can move between a first position and a second position in a direction intersecting a first optical axis. In the first position, the first prism reflects the received illumination light at the first prism surface onto a light modulation element, transmits the first light generated by reflection at the light modulation element at the first prism surface and emits the first light to the front side, and the second prism transmits the first light incident from the first prism at the second prism surface and emits the first light to the front side along the first optical axis, and in the second position, the third prism receives the second light propagating toward the back side along the first optical axis, reflects at least a portion of the received second light at the third prism surface, and deflects the second light to be emitted along the second optical axis.
Inventors:
YAMAMOTO NORIKAZU
Application Number:
PCT/JP2023/036111
Publication Date:
April 11, 2024
Filing Date:
October 03, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G03B21/14; G02B5/04; G03B21/00; H04N5/74
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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