US 11,895,445 B2
Projection video display apparatus with variable light adjustment for multi-screen projection mode
Takuya Shimizu, Osaka (JP); and Shinji Onodera, Osaka (JP)
Assigned to MAXELL, LTD., Kyoto (JP)
Filed by MAXELL, LTD., Kyoto (JP)
Filed on Oct. 17, 2022, as Appl. No. 17/967,088.
Application 17/967,088 is a continuation of application No. 17/346,677, filed on Jun. 14, 2021, granted, now 11,509,872.
Application 17/346,677 is a continuation of application No. 16/850,326, filed on Apr. 16, 2020, granted, now 11,064,169, issued on Jul. 13, 2021.
Application 16/850,326 is a continuation of application No. 16/215,198, filed on Dec. 10, 2018, granted, now 10,666,915, issued on May 26, 2020.
Application 16/215,198 is a continuation of application No. 15/510,160, granted, now 10,205,920, issued on Feb. 12, 2019, previously published as PCT/JP2016/059809, filed on Mar. 28, 2016.
Prior Publication US 2023/0037711 A1, Feb. 9, 2023
Int. Cl. H04N 9/31 (2006.01); G03B 21/20 (2006.01); G06F 3/0482 (2013.01)
CPC H04N 9/3147 (2013.01) [G03B 21/2006 (2013.01); G03B 21/206 (2013.01); G06F 3/0482 (2013.01); H04N 9/3155 (2013.01); H04N 9/3182 (2013.01)] 12 Claims
OG exemplary drawing
 
7. A projection video display apparatus with variable light adjustment for multi-screen projection mode, comprising:
a video input interface configured to input an input video;
a light source;
a display panel configured to allow incidence of light generated by the light source thereon and to make the light pass therethrough or reflect thereon;
a projection optical system configured to project the light from the display panel as a display video;
a movable light shielding plate configured to shield a light on an optical path of an optical system of the projection video display apparatus and to change a light shielding amount of the optical system;
a communication interface configured to communicate with another projection video display apparatus; and
a controller configured to execute at least two types of variable light adjusting controls, the two types of variable light adjusting controls including a first variable light adjusting control to adjust brightness of the light source, and a second variable light adjusting control to adjust a light shielding amount of the optical system by the movable light shielding plate,
wherein a plurality of display modes controlled by the controller are prepared and one display mode of the plurality of display modes can be selected based on a menu screen operation,
wherein the plurality of display modes of the display video controlled by the controller include a display mode, which corresponds to the multi-screen projection mode, in the multi-screen projection mode where a plurality of projection video display apparatuses, including the projection video display apparatus and the another projection video display apparatus, projects display videos to be combined as one video, the communication interface is configured to transmit a first control information to the another projection video display apparatus, for making variable light adjusting control of adjusting brightness of a light source of the another projection video display apparatus inter-locked with the first variable light adjusting control in the projection video display apparatus, and the communication interface is configured to transmit a second control information to the another projection video display apparatus, for making variable light adjusting control of adjusting a light shielding amount of an optical system in the another projection video display apparatus by a movable light shielding plate of the another projection video display apparatus inter-locked with the second variable light adjusting control in the projection video display apparatus.