Granted Patent B2

US 12,610,028 · App. 18/143,986 · Granted Apr 21, 2026

Inventors: Eunseok Choi (Suwon-si, KR); Sungho Chae (Suwon-si, KR); Byungseok Soh (Suwon-si, KR)

Assignee: SAMSUNG ELECTRONICS CO., LTD.

H04N9/317G01B11/026H04N9/3185

Abstract

Claims (57)

1 . An electronic apparatus comprising:

a projection part;

an acceleration sensor;

a plurality of distance sensors arranged on one surface of the electronic apparatus, the one surface facing a projection surface;

a memory storing at least one instruction; and

a processor configured to:

control the projection part to project an image,

detect information on a movement of the electronic apparatus by using at least one of the acceleration sensor or the plurality of distance sensors,

based on determining from the information on a movement of the electronic apparatus, that the electronic apparatus is in a stopped state after having moved, acquire information on a posture of the electronic apparatus based on sensing values acquired through the acceleration sensor and the plurality of distance sensors, and acquire information on a distance between the electronic apparatus and the projection surface based on sensing values acquired through the plurality of distance sensors, and

perform keystone correction for the image based on the information on the posture of the electronic apparatus and perform auto-focusing of the image based on the distance between the electronic apparatus and the projection surface.

2 . The electronic apparatus of claim 1 ,

wherein the plurality of distance sensors are arranged side by side on a left side and a right side on the one surface, and are arranged to be rotated by a first angle to face one another.

3 . The electronic apparatus of claim 2 ,

wherein the processor is further configured to:

calculate a first rotation angle and a second rotation angle for the direction of gravity of the electronic apparatus based on the sensing values acquired by using the acceleration sensor, and

calculate a third rotation angle of the electronic apparatus for the projection surface based on the sensing values acquired by using the plurality of distance sensors and the first angle, and

wherein the first rotation angle is a pitch angle,

the second rotation angle is a roll angle, and

the third rotation angle is a yaw angle.

4 . The electronic apparatus of claim 2 ,

wherein the first angle is an angle by which the plurality of distance sensors are rotated such that lights output by the plurality of distance sensors are located within the projection surface, and is an angle by which the plurality of distance sensors are rotated such that lights output by the plurality of distance sensors intersect one another before reaching the projection surface.

5 . The electronic apparatus of claim 1 ,

wherein the plurality of distance sensors are arranged to be rotated by a second angle in an upper direction or a lower direction to be toward a center of the projection surface.

6 . The electronic apparatus of claim 5 ,

wherein the processor is further configured to:

calculate a first distance between a center of the plurality of distance sensors and the center of the projection surface by using the sensing values acquired through the plurality of distance sensors, and

calculate a straight distance from the center of the plurality of distance sensors to the projection surface by using the first distance and the second angle.

7 . The electronic apparatus of claim 6 ,

wherein the processor is further configured to:

perform auto-focusing of the image by moving a predetermined location of a focus lens by using the straight distance.

8 . The electronic apparatus of claim 1 , wherein the plurality of distance sensors are arranged to be rotated on the one surface of the electronic apparatus.

9 . A method for controlling an electronic apparatus including an acceleration sensor and a plurality of distance sensors arranged on one surface facing a projection surface, the method comprising:

projecting an image;

detecting information on a movement of the electronic apparatus by using at least one of the acceleration sensor or the plurality of distance sensors;

based on determining from the information on a movement of the electronic apparatus, that the electronic apparatus is in a stopped state after having moved, acquiring information on a posture of the electronic apparatus based on sensing values acquired through the acceleration sensor and the plurality of distance sensors, and acquiring information on a distance between the electronic apparatus and the projection surface based on sensing values acquired through the plurality of distance sensors; and

performing keystone correction for the image based on the information on the posture of the electronic apparatus and performing auto-focusing of the image based on the distance between the electronic apparatus and the projection surface.

10 . The controlling method of claim 9 ,

wherein the plurality of distance sensors are arranged side by side on a left side and a right side on the one surface, and are arranged to be rotated by a first angle to face one another.

11 . The controlling method of claim 10 ,

wherein the acquiring comprises:

calculating a first rotation angle and a second rotation angle for the direction of gravity of the electronic apparatus based on the sensing values acquired by using the acceleration sensor; and

calculating a third rotation angle of the electronic apparatus for the projection surface based on the sensing values acquired by using the plurality of distance sensors and the first angle, and

wherein the first rotation angle is a pitch angle,

the second rotation angle is a roll angle, and

the third rotation angle is a yaw angle.

12 . The controlling method of claim 10 ,

wherein the first angle is an angle by which the plurality of distance sensors are rotated such that lights output by the plurality of distance sensors are located within the projection surface, and is an angle by which the plurality of distance sensors are rotated such that lights output by the plurality of distance sensors intersect one another before reaching the projection surface.

13 . The controlling method of claim 9 ,

wherein the plurality of distance sensors are arranged to be rotated by a second angle in an upper direction or a lower direction to be toward a center of the projection surface.

14 . The controlling method of claim 13 ,

wherein the acquiring comprises:

calculating a first distance between a center of the plurality of distance sensors and the center of the projection surface by using the sensing values acquired through the plurality of distance sensors, and

calculating a straight distance from the center of the plurality of distance sensors to the projection surface by using the first distance and the second angle.

15 . The controlling method of claim 14 ,

wherein the control method comprises:

performing auto-focusing of the image by moving a predetermined location of a focus lens by using the straight distance.

16 . The controlling method of claim 9 , wherein the plurality of distance sensors are arranged to be rotated on the one surface.

Assignments (1)

Priority Claims (2)

Continuity (2)

References Cited (33)