US 12,130,547 B2
Image display apparatus
Keisuke Homma, Kanagawa (JP); and Kazuya Matsumoto, Kanagawa (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Filed by SONY GROUP CORPORATION, Tokyo (JP)
Filed on May 30, 2023, as Appl. No. 18/325,881.
Application 18/325,881 is a continuation of application No. 17/535,888, filed on Nov. 26, 2021, granted, now 11,693,305.
Application 17/535,888 is a continuation of application No. 16/628,227, granted, now 11,209,725, issued on Dec. 28, 2021, previously published as PCT/JP2018/019073, filed on May 17, 2018.
Claims priority of application No. 2017-136618 (JP), filed on Jul. 12, 2017.
Prior Publication US 2023/0296977 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G03B 33/12 (2006.01); G03B 21/00 (2006.01); G03B 21/20 (2006.01); G03B 21/28 (2006.01)
CPC G03B 33/12 (2013.01) [G03B 21/006 (2013.01); G03B 21/008 (2013.01); G03B 21/2053 (2013.01); G03B 21/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image display apparatus, comprising:
a first optical device configured to extract a first light beam corresponding to a first color, the first color being one of red, green, and blue,
a second optical device configured to split the first light beam into a first split light beam and a second split light beam, the first split light beam and the second split light beam each travelling in a different direction, and
a sensor disposed on an optical path of the second split light beam and comprising a first filter and a second filter, the sensor being configured to detect a state of the second split light beam, wherein
the first filter is configured to transmit a light beam in a first wavelength range corresponding to the first color,
the second filter is configured to transmit a light beam in a second wavelength range, the second wavelength range including at least part of the first wavelength range and being different from the first wavelength range, and
the sensor comprises a plurality of the first filters and a plurality of the second filters, the plurality of the first filters and the plurality of the second filters being arranged in a two-dimensional form, and each of the plurality of the second filters is arranged to not be next to another one of the second filters.