Image projection apparatus capable of preventing image which would be hindrance to viewing printed material from being projected on printed material, control method therefor, and storage medium

Abstract

An image projection apparatus which is capable of preventing an image which would be a hindrance to viewing printed material from being projected on the printed material. Based on input image data, a projection unit projects a projected image. Whether or not the printed material is placed on a screen at a projection destination of light projected by the projection unit is determined. The projection unit is controlled based on a result of the determination.

What is claimed is: 
     
         1 . A projection apparatus comprising:
 a projection unit configured to project an image on a screen; and   at least one processor and/or at least one circuit that performs operations of following:   determining whether or not image data is input;   determining a condition of the screen;   in a case that the image data is not input, controlling the projection unit based on the condition of the screen.   
     
     
         2 . The projection apparatus according  claim 1 , wherein the at least one processor and/or at least one circuit further performs operations of following:
 determining whether or not an object is on the screen,   in a case that the image data is not input and the object is not on the screen, controlling the projection unit to project a first image on the screen, and   in a case that the image data is not input and the object is on the screen, controlling the projection unit to project a second image on the screen.   
     
     
         3 . The projection apparatus according  claim 2 , wherein the object is printed material. 
     
     
         4 . The projection apparatus according  claim 2 , wherein the first image is a color image, and the second image is a white image. 
     
     
         5 . A projection apparatus comprising:
 a projection unit configured to project an image on a screen; and   at least one processor and/or at least one circuit that performs operations of following:   setting a projection mode;   determining whether or not image data is input;   in a case that the image data is not input, controlling the projection unit based on the set projection mode.   
     
     
         6 . The projection apparatus according  claim 5 , wherein the at least one processor and/or at least one circuit further performs operations of following:
 in a case that the image data is not input and the set projection mode is a first projection mode, controlling the projection unit to project a first image on the screen, and   in a case that the image data is not input and the set projection mode is a second projection mode, controlling the projection unit to project a second image on the screen.   
     
     
         7 . The projection apparatus according  claim 6 , wherein the first image is a color image, and the second image is a white image. 
     
     
         8 . A control method for a projection apparatus having a projection unit configured to project an image on a screen, the control method comprising:
 determining whether or not image data is input;   determining a condition of the screen;   in a case that the image data is not input, controlling the projection unit based on the condition of the screen.   
     
     
         9 . The control method according  claim 8 , further comprising:
 determining whether or not an object is on the screen;   in a case that the image data is not input and the object is not on the screen, controlling the projection unit to project a first image on the screen; and   in a case that the image data is not input and the object is on the screen, controlling the projection unit to project a second image on the screen.   
     
     
         10 . The control method according  claim 9 , wherein the object is printed material. 
     
     
         11 . The control method according  claim 9 , wherein the first image is a color image, and the second image is a white image. 
     
     
         12 . A control method for a projection apparatus having a projection unit configured to project an image on a screen, the control method comprising:
 setting a projection mode;   determining whether or not image data is input; and   in a case that the image data is not input, controlling the projection unit based on the set projection mode.   
     
     
         13 . The control method according  claim 12 , further comprising:
 in a case that the image data is not input and the set projection mode is a first projection mode, controlling the projection unit to project a first image on the screen; and   in a case that the image data is not input and the set projection mode is a second projection mode, controlling the projection unit to project a second image on the screen.   
     
     
         14 . The control method according  claim 13 , wherein the first image is a color image, and the second image is a white image. 
     
     
         15 . A con-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a projection apparatus having a projection unit configured to project an image on a screen, the control method comprising:
 determining whether or not image data is input;   determining a condition of the screen;   in a case that the image data is not input, controlling the projection unit based on the condition of the screen.   
     
     
         16 . A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a projection apparatus having a projection unit configured to project an image on a screen, the control method comprising:
 setting a projection mode;   determining whether or not image data is input; and   in a case that the image data is not input, controlling the projection unit based on the set projection mode.