Image display apparatus, image display method, and recording medium having image display program stored therein

An image display apparatus for emitting laser light, displaying a first image on a first projection surface, and display a second image on a second projection surface comprising:

• a laser light source for outputting said laser light;
• a scanner for scanning said laser light;
• a light splitting element for splitting said laser light scanned by said scanner into a first laser beam directed to said first projection surface and a second laser beam directed to said second projection surface;
• a photodetector for detecting said second laser beam reflected by an external object on said second projection surface;
• and
• a controller for controlling an operation of said image display apparatus, said controller being configured;
• to allow said scanner to operate at a prescribed scanning frequency,
• to execute processing of accepting image data and increasing luminance of a pixel in a designated region included in accepted said image data,
• to control output of said laser light by said laser light source based on said image data subjected to said processing and said scanning frequency,
• to calculate a position of said external object based on a scanning position of said laser light at a light detection timing of said photodetector, and
• to create an instruction to change said second image based on calculated said position, wherein said controller is configured to define a region including calculated said position as said designated region, and to calculate a predicted position of said object based on a change of said position and a time interval between changes of said second image and define a region including said predicted position as said designated region.

An image display apparatus for emitting laser light, displaying a first image on a first projection surface, and displaying a second image on a second projection surface comprising:

• a laser light source for outputting said laser light,
• said laser light source including
• a two-color laser for outputting red laser light and blue laser light, and
• a green laser for outputting green laser light;
• a resonant MEMS mirror for scanning said laser light;
• a beam splitter for splitting said laser light scanned by said resonant MEMS mirror into a first laser beam directed to said first projection surface and a second laser beam directed to said second projection surface;
• a photodiode for detecting said second laser beam reflected by an external object on said second projection surface;
• and
• a controller for controlling an operation of said image display apparatus, said controller being configured:
• to allow said resonant MEMS mirror to operate at a prescribed scanning frequency,
• to execute processing of accepting image data and setting to white a pixel in a designated region included in accepted said image data,
• to control output of said laser light by said laser light source based on said image data subjected to said processing and said scanning frequency,
• to calculate a position of said external object based on a scanning position of said laser light at a light detection timing of said photodiode,
• to create an instruction to change said second image based on calculated said position, and
• to set a region including calculated said position as said designated region,
• wherein a size of said designated region is larger than a distance of movement of said object in a time interval between changes of said second image.

A method for emitting laser light, displaying a first image on a first projection surface, and displaying a second image on a second projection surface, using an image display apparatus,

• said image display apparatus having:
• a laser light source for outputting said laser light,
• a scanner for scanning said laser light,
• a light splitting element for splitting said laser light scanned by said scanner into a first laser beam directed to said first projection surface and a second laser beam directed to said second projection surface, and
• a photodetector for detecting said second laser beam reflected by an external object on said second projection surface,
• said method comprising:
• executing processing of accepting image data and increasing luminance of a pixel in a designated region included in accepted said image data;
• allowing said scanner to operate at a prescribed scanning frequency and controlling output of said laser light by said laser light source based on said image data subjected to said processing and said scanning frequency;
• calculating a position of said external object based on a scanning position of said laser light at a light detection timing of said photodetector;
• and
• changing said second image based on calculated said position,
• defining a region including calculated said position as said designated region, wherein a size of said designated region is larger than a distance of movement of said object in a time interval between changes of said second image.

A non-transitory recording medium having a program stored therein for allowing an image display apparatus to emit laser light, display a first image on a first projection surface, and display a second image on a second projection surface,

• said image display apparatus having:
• a laser light source for outputting said laser light,
• a scanner for scanning said laser light,
• a light splitting element for splitting said laser light scanned by said scanner into a first laser beam directed to said first projection surface and a second laser beam directed to said second projection surface, and
• a photodetector for detecting said second laser beam reflected by an external object on said second projection surface,
• when said program is read out, said program causing a computer to execute:
• executing processing of increasing luminance of a pixel in a designated region included in image data applied to said computer;
• allowing said scanner to operate at a prescribed scanning frequency and controlling output of said laser light by said laser light source based on said image data subjected to said processing and said scanning frequency;
• calculating a position of said external object based on a scanning position of said laser light at a light detection timing of said photodetector;
• and
• changing said second image based on calculated said position,
• defining a region including calculated said position as said designated region, wherein a size of said designated region is larger than a distance of movement of said object in a time interval between changes of said second image.