LIGHT QUANTITY ADJUSTMENT DEVICE AND PROJECTION IMAGE DISPLAY DEVICE

WIPO Patent Application WO/2024/080166

A1

A light quantity adjustment device according to the present disclosure comprises: a plurality of blade substrates that are provided so as to be rotatable by an operating shaft and a rotating shaft; a first member that has formed therein a first central opening and that lies along the circumferential direction of the rotating shaft so as to define the position of the same; and a second member that sandwiches, together with the first member, the plurality of blade substrates, that forms a second central opening contiguous with the first central opening, and that engages with the plurality of blade substrates via the operating shaft. The plurality of blade substrates are rotatable so as to change the shielding amount of the first central opening. Each of the plurality of blade substrates has a first region and a second region positioned at the leading end side as compared to the first region. The lower surface of the blade substrate in the second region is formed at a position higher in the thickness direction as compared to the upper surface of the blade substrate in the first region. When viewed in the thickness direction, the second region of each of the plurality of blade substrates partially overlaps with the first region of the adjacent another one of the plurality of blade substrates at least in the throttle position.

YAMAGISHI SHIGEKAZU
AMANO AKIHITO

PCT/JP2023/035655

April 18, 2024

September 29, 2023

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PANASONIC INTELLECTUAL PROPERTY MAN CO LTD (JP)

G03B21/14; F21V11/10; G03B9/06; G03B21/00; G03B21/16; H04N5/74; F21Y115/30

KAMATA Kenji et al. (JP)

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