US Patent No. 9,357,187

PROJECTOR AND IMAGE DISPLAY METHOD


Patent No. 9,357,187
Issue Date May 31, 2016
Title Projector And Image Display Method
Inventorship Atsushi Katou, Tokyo (JP)
Assignee NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP)

Claim of US Patent No. 9,357,187

1. An image display method implemented in a projector that includes first to third display elements each of which spatially
modulates incident light to display an image, synthesizes the images displayed by the first to third display elements, and
projects the synthesized image,
the method comprising:
irradiating, for a predetermined period, the first display element with red light having a peak wavelength in a red wavelength
band such that the first display element displays a red image based on an input video signal;

irradiating, for the predetermined period, the second display element with first green light having a peak wavelength in a
green wavelength band such that the second display element displays a green image based on the input video signal; and

irradiating, for a first period, the third display element with second green light having a peak wavelength in the green wavelength
band such that the third display element displays the green image, and irradiating, for a second period, the third display
element with blue light having a peak wavelength in a blue wavelength band on the same optical path as that of the second
green light such that the third display element displays a blue image based on the input video signal, the first and second
periods being provided by dividing the predetermined period with a predetermined ratio,

wherein the peak wavelength of said first green light is equal to that of said second green light.