1. A pattern position detection method for capturing patterns displayed on a display panel with a camera and detecting positions of images of the patterns on an imaging surface of the camera, the method comprising: a red pattern capturing step of displaying red patterns at predetermined positions on the display panel and capturing the red patterns with the camera; a first black image capturing step of displaying a black image on the display panel and capturing the black image with the camera using a shutter speed and/or an f-number used in the red pattern capturing step; a green pattern capturing step of displaying green patterns at predetermined positions on the display panel and capturing the green patterns with the camera; a second black image capturing step of displaying a black image on the display panel and capturing the black image with the camera using a shutter speed and/or an f-number used in the green pattern capturing step; a blue pattern capturing step of displaying blue patterns at predetermined positions on the display panel and capturing the blue patterns with the camera; a third black image capturing step of displaying a black image on the display panel and capturing the black image with the camera using a shutter speed and/or an f-number used in the blue pattern capturing step; a red pattern position detecting step of detecting positions of images of the red patterns on the imaging surface based on a difference between an image captured in the red pattern capturing step and an image captured in the first black image capturing step; a green pattern position detecting step of detecting positions of images of the green patterns on the imaging surface based on a difference between an image captured in the green pattern capturing step and an image captured in the second black image capturing step; and a blue pattern position detecting step of detecting positions of images of the blue patterns on the imaging surface based on a difference between an image captured in the blue pattern capturing step and an image captured in the third black image capturing step.