US 12,457,310 B2
Projector
Kohei Miura, Tokyo (JP); Tomoyuki Ueda, Tokyo (JP); and Hirofumi Fujikura, Tokyo (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Mar. 22, 2023, as Appl. No. 18/125,040.
Application 18/125,040 is a continuation of application No. PCT/JP2021/032631, filed on Sep. 6, 2021.
Claims priority of application No. 2020-159224 (JP), filed on Sep. 24, 2020; and application No. 2021-017720 (JP), filed on Feb. 5, 2021.
Prior Publication US 2023/0254460 A1, Aug. 10, 2023
Int. Cl. H04N 9/31 (2006.01); G09G 3/00 (2006.01)
CPC H04N 9/3164 (2013.01) [G09G 3/001 (2013.01); H04N 9/3144 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A projector, comprising:
an optical apparatus;
a control circuit board disposed above an upper side of the optical apparatus;
a cooling fan disposed near a rear surface outside air inlet portion of a case which lies opposite to a projection direction and having an upper surface outside air inlet port configured to let in outside air from an upper surface and a lower surface outside air inlet port configured to let in outside air from a lower surface of the case; and
a heat sink provided corresponding to a discharge port of the cooling fan and connected with the optical apparatus,
wherein a flow path resistance on a side facing the lower surface outside air inlet port is smaller than a flow path resistance on a side facing the upper surface outside air inlet port.