公开(公告)号：US20240126092A1

公开(公告)日：2024-04-18

申请号：US17966891

申请日：2022-10-17

Applicant: PIXART IMAGING INC.

Inventor： Sai-Mun LEE ,  Hun-Kwang LEE ,  Yee-Loong CHIN ,  Chee-Pin T'NG

IPC: G02B27/09 ,  G01S7/481

CPC classification number: G02B27/0955 ,  G01S7/4815

Abstract: There is provided an optical navigation device including a substrate, a light sensor, a first light source, a second light source and a light directing member. The light sensor is arranged on the substrate and has a field of view (FOV) perpendicular to the substrate. The emission light of the first light source forms a first illumination light beam after passing the light directing member. The emission light of the second light source forms a second illumination light beam after passing the light directing member. A first crossover region of the first illumination light beam with the FOV is closer to the substrate than a second crossover region of the second illumination light beam with the FOV.

公开(公告)号：US20240069650A1

公开(公告)日：2024-02-29

申请号：US18504192

申请日：2023-11-08

Applicant: PIXART IMAGING INC.

Inventor： Yee-Loong CHIN ,  Wan-Piang LIM ,  Sai-Mun LEE

IPC: G06F3/03 ,  G06F3/0354

CPC classification number: G06F3/0304 ,  G06F3/03543

Abstract: There is provided a navigation device including a light source, a light guide and a light sensor. The navigation device is operated relative to a work surface. The light source generates an illumination beam passing through the light guide to generate an illuminated area on the work surface. The light sensor receives reflected light from the illuminated area via the light guide. When a working gap between the navigation device and the work surface is increased, a first size of the illuminated area in a first direction is substantially identical to a first initial size of the illumination beam in the first direction after just leaving the light guide, and a second size of the illuminated area in a second direction is smaller than a second initial size of the illumination beam in the second direction after just leaving the light guide.