Patent ID: 11934086
Assignee: ZTE CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. The method as claimed in claim 1, wherein the distance L2 between the mobile terminal and the projection screen is calculated by the following formulae:

L2=L−√{square root over (L12−L32)}, when α≤90°;

L2=L+√{square root over (L12−L32)}, when α>90°;

where the L is the specified distance, the L1 is the first distance, the α is an included angle between a line segment corresponding to the L and a line segment corresponding to the L1, the L3 is a distance between an intersection point A and an intersection point B, and is equal to sin α wherein the intersection point A is an orthogonal projection point of the projection device onto a plane of the projection screen, and the intersection point B is an orthogonal projection point of the mobile terminal onto the plane of the projection screen.