Three-dimensional space touch apparatus using multiple infrared cameras

A space touch apparatus, comprising:

• at least one infrared light source which emits at least one infrared ray to form an infrared screen having a predetermined coordinate frame in a space;
• at least two cameras oriented to the infrared screen to respectively capture at least two images of an area including a selected location, touched by user pointing means, in the infrared screen;
• and
• a space touch sensor module which calculates coordinates of the selected location in the infrared screen using scattering or diffusion of the infrared ray generated in the at least two images of the area including the selected location respectively captured by the at least two cameras when the selected location is touched by the user pointing means,
• wherein the space touch sensor module:
• calculates a Z-axis coordinate of the selected location in the infrared screen by dividing a vertical-axis coordinate of locations, corresponding to the selected location of the camera images touched by the user pointing means, by a resolution of the at least two cameras, and multiplying a result of the division by a predetermined distance of the Z-axis;
• and
• calculates X-axis and Y-axis coordinates of the selected location in the infrared screen using lateral-axis coordinates of the locations of the camera images touched by the user pointing means and information about angles of view of the at least two cameras.

A space touch apparatus, comprising:

• at least one light source which emits at least one selected wavelength light ray to form a screen having a predetermined shape in a space;
• at least two cameras including a left and a right infrared camera which respectively capture at least two images of an area including a selected location using scattering or diffusion of the selected wavelength light rays when the selected location is touched by user pointing means in the screen, and filtering out different wavelength lights;
• a space touch sensor module which calculates coordinates of the selected location in the infrared screen, touched by user pointing means, using the at least two images of the area including the selected location respectively captured by the at least two cameras,
• wherein the space touch sensor module:
• calculates a Z-axis coordinate of the selected location in the screen by dividing a vertical-axis coordinate of locations, corresponding to the selected location of the camera images touched by the user pointing means, by a resolution of the left and right infrared cameras, and multiplying a result of the division by a predetermined distance of the Z-axis;
• and
• calculates X-axis and Y-axis coordinates of the selected location in the infrared screen using lateral-axis coordinates of the locations in the camera images touched by the user pointing means and the information about angles of view of the left and right infrared cameras.