Abstract: A holographic display apparatus capable of providing an expanded viewing window and a display method are provided. The holographic display apparatus includes an image processor configured to provide computer generated hologram (CGH) data to a spatial light modulator, wherein the image processor is further configured to generate a hologram data array comprising information of the holographic image to be reproduced at the first resolution or a resolution less than the first resolution, perform an off-axis phase computation on the hologram data array at the second resolution, and then, generate the CHG data at the first resolution.
Type:
Grant
Filed:
June 24, 2021
Date of Patent:
January 31, 2023
Assignees:
SAMSUNG ELECTRONICS CO., LTD., Korean University Research and Business Foundation, Sejong Campus
Inventors:
Hoon Song, Hwi Kim, Jungkwuen An, Hongseok Lee, Yunhee Kim, Chilsung Choi
Abstract: A low-jitter digital clock signal generating system which uses optical pulses output from a pulse laser includes a first balanced photodetector that converts first and second optical pulses with a delayed time interval into first and second electrical pulses through first and second photodiodes and outputs first and second modulated pulses generated by allowing the first and second electrical pulses to partially overlap each other, a second balanced photodetector that converts third and fourth optical pulses with the delayed time interval into third and fourth electrical pulses through third and fourth photodiodes, and outputs a second modulated pulse generated by allowing the third and fourth electrical pulses to partially overlap each other, and a capacitor. The capacitor is charged by the first modulated pulse, is discharged by the second modulated pulse, and outputs a voltage according to the charging and discharging as a clock signal.
Type:
Grant
Filed:
February 26, 2020
Date of Patent:
August 3, 2021
Assignees:
Korea Advanced Institute of Science and Technology, Korean University Research and Business Foundation, Sejong Campus
Inventors:
Jungwon Kim, Hayun Cecillia Chung, Minji Hyun, Yongjin Na