US 11,054,726 B2
Pico projector and control method therefor
Yun-Lin Miao, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on May 27, 2020, as Appl. No. 16/885,256.
Claims priority of provisional application 62/853,724, filed on May 29, 2019.
Claims priority of application No. 201911015584.9 (CN), filed on Oct. 24, 2019.
Prior Publication US 2020/0379322 A1, Dec. 3, 2020
Int. Cl. G03B 21/28 (2006.01); G03B 21/14 (2006.01); F21S 41/16 (2018.01); F21S 41/141 (2018.01); F21S 41/67 (2018.01)
CPC G03B 21/14 (2013.01) [F21S 41/141 (2018.01); F21S 41/16 (2018.01); F21S 41/67 (2018.01); G03B 21/28 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pico projector, installed on a door of a vehicle and comprising:
a light source, configured to provide an illumination beam,
a digital micromirror device, disposed on a propagation path of the illumination beam and configured to convert the illumination beam to an image beam,
a projection lens, disposed on a propagation path of the image beam and configured to project the image beam to the outside of the pico projector,
a power supply unit, coupled to the light source and the digital micromirror device, and
a processing circuit, coupled to the power supply unit and the digital micromirror device, wherein the processing circuit receives a shutdown warning signal, transmits a parking signal to the digital micromirror device to perform a parking operation on the digital micromirror device, and notifies the power supply unit of cutting off a first power supplied to the digital micromirror device after a predetermined time interval from transmitting the parking signal.