US 11,862,121 B2
Liquid crystal apparatus and projection-type display apparatus
Ken Shimada, Chitose (JP); Hiroyuki Oikawa, Chitose (JP); and Kiyoshi Hara, Suwa (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jul. 28, 2022, as Appl. No. 17/876,475.
Claims priority of application No. 2021-124151 (JP), filed on Jul. 29, 2021.
Prior Publication US 2023/0029855 A1, Feb. 2, 2023
Int. Cl. G09G 3/36 (2006.01); G02F 1/1343 (2006.01); G03B 21/00 (2006.01)
CPC G09G 3/3614 (2013.01) [G02F 1/134309 (2013.01); G03B 21/006 (2013.01); G09G 2310/06 (2013.01); G09G 2320/046 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electronic apparatus comprising:
a light source with an output light flux of 5000 lumen to 20000 lumen;
a light splitting member configured to split light from the light source;
a first liquid crystal apparatus configured to modulate first light split by the light splitting member; and
a second liquid crystal apparatus configured to modulate second light split by the light splitting member, wherein
the first liquid crystal apparatus includes:
a first liquid crystal layer
a first pixel electrode provided in a display region and configured to be supplied with an image signal at a first frequency; and
a first electrode provided in a region outside the display region and configured to be alternately supplied with a positive polarity potential with a potential higher than a predetermined potential and a negative polarity potential with a potential lower than the predetermined potential at a second frequency lower than the first frequency such that a positive polarity period in which the positive polarity potential is supplied and a negative polarity period in which the negative polarity potential is supplied have a same length, and
the second liquid crystal apparatus includes:
a second liquid crystal layer;
a second pixel electrode provided in a display region of the second liquid crystal apparatus and configured to be supplied with an image signal at the first frequency; and
a second electrode provided in a region outside the display region and configured to be alternately supplied with a positive polarity potential with a potential higher than a predetermined potential and a negative polarity potential with a potential lower than the predetermined potential at a third frequency lower than the first frequency such that a positive polarity period in which the positive polarity potential is supplied and a negative polarity period in which the negative polarity potential is supplied have different lengths.