US 11,670,250 B2
Image processing device, display apparatus, and image processing method for converting color image signal
Hiroaki Kimura, Kanagawa (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Filed by SONY GROUP CORPORATION, Tokyo (JP)
Filed on Nov. 29, 2021, as Appl. No. 17/537,347.
Application 17/537,347 is a continuation of application No. 16/966,137, granted, now 11,217,189, previously published as PCT/JP2018/045877, filed on Dec. 13, 2018.
Claims priority of application No. JP2018-019983 (JP), filed on Feb. 7, 2018.
Prior Publication US 2022/0108664 A1, Apr. 7, 2022
Int. Cl. G09G 3/36 (2006.01); G02F 1/1347 (2006.01)
CPC G09G 3/3607 (2013.01) [G02F 1/13471 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0271 (2013.01); G09G 2340/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A display apparatus comprising:
a display panel in which a display image is generated by light passing through a rear liquid crystal cell and a front liquid crystal cell, and including a diffusion layer arranged between the front liquid crystal cell and the rear liquid crystal cell,
wherein a distance between the diffusion layer and the front liquid crystal cell is less than a distance between the diffusion layer and the rear liquid crystal cell, and
circuitry configured to:
convert a color image signal for the display panel into a black-and-white image signal;
generate a rear image signal based on the converted color image signal for the rear liquid crystal cell; and
convert the color image signal based on a lower limit value of a gradation value set for each color included in the color image signal.