Position indication method, operation device, display device and position indication device

Abstract

The invention discloses a position indication method, an operation device, a display device and a position indication device. The method comprises the steps that the operation device shoots the indication position on a display picture of the display device; a position marker is identified in an imaging picture at the preset moment; when the position marker is identified, coordinates of the indication position on the display picture are obtained according to coordinates of the position marker in the imaging picture; when the position marker is not identified, coordinates of the position marker on the display picture are obtained according to coordinates of the position marker on the imaging picture at the moment X and motion displacement of the operation device between the moment time X and the present moment; the operation device sends the coordinates of the indication position on the display picture to the display device to be displayed. By means of the method, no matter whether or not the position marker is identified on the imaging picture at the present moment, the coordinates of the indication position in the display picture can be calculated, and the defect that normal indication cannot be achieved due to a shooting dead zone is overcome.

Description

Technical field [0001] The present invention relates to the field of electronic display technology, in particular to a position indication method, operating device, display device and position indication device. Background technique [0002] In a meeting or teaching scene, the lecturer usually uses a laser pointer to project a light spot on the screen to indicate a specific location on the screen. Laser pointers, also known as laser pointers, pointing stars, etc., are pen-shaped transmitters designed to be portable, easy to hold, and processed into laser modules (light-emitting diodes) with visible lasers. [0003] The use of laser pointers for position indication has two defects: [0004] First, many of the laser pointers and laser flashlights on the market are of class IIIB, with a power exceeding 5mW. If the laser is directed into the eyes, it may cause damage to the eyes. For some high-power laser pointers, the diffused light may also cause damage to the eyes, and may even igni...

AI Technical Summary

Problems solved by technology

[0008] In view of the above problems, the object of the present invention is to provide a position indication method, an operating device, a display device and a position indication device, which are suitable for various display devices, and can accurately indicate the position to be indicated, avoiding the failure of normal indication due to blind spots in shooting Case

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