US 9,812,070 B2
Display apparatus and irradiation light controlling method
Daisuke Takayanagi, Kawasaki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jul. 29, 2016, as Appl. No. 15/223,232.
Claims priority of application No. 2015-165569 (JP), filed on Aug. 25, 2015.
Prior Publication US 2017/0061898 A1, Mar. 2, 2017
Int. Cl. H05B 33/08 (2006.01); G09G 3/34 (2006.01); H05B 37/02 (2006.01); G02F 1/1335 (2006.01)
CPC G09G 3/3406 (2013.01) [G02F 1/133602 (2013.01); H05B 37/0218 (2013.01); H05B 37/0227 (2013.01); G02F 2001/133612 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a display unit configured to display an image;
a light emitting unit which is provided on a rear side of the display unit and is configured to output irradiation light which is irradiated to the display unit;
a light detecting unit which is provided on a rear side of the display unit and is configured to detect an intensity of the light which enters;
an external light intensity specifying unit configured to specify an intensity of external light which enters the display unit on the basis of the intensity of the light, detected by the light detecting unit while the light emitting unit does not irradiate the irradiation light; and
a correcting unit configured to correct an intensity of the irradiation light in such a manner that in the case where the intensity of the external light is equal to or smaller than an external light determination threshold value and the intensity of the detection light detected by the light detecting unit while the light emitting unit is irradiating the irradiation light is equal to or smaller than a detected light determination threshold value larger than the external light determination threshold value, the intensity of the irradiation light is corrected by using a first correcting method, and in the case where the intensity of the external light is larger than the external light determination threshold value or the intensity of the detection light detected by the light detecting unit while the light emitting unit is irradiating the irradiation light is larger than the detected light determination threshold value, the intensity of the irradiation light is not corrected or the intensity of the irradiation light is corrected by using a second correcting method different from the first correcting method.