Selection, installation of screen, projector for schools.

1.Where is the ideal place to put the projection screen?

• This seems like an unnecessary question, because most people assume that the ideal location will be in front of and in the middle of the classroom.
• However, sunlight, light in the room, and light reflecting from the walls, floors, light-colored ceilings can have a negative effect on the expected picture quality.
• Ideally, you should place the screen in a place where there is little sunlight and direct sunlight on the screen. Can cover the window and turn off the lights is best. Walls, ceilings or dark floors will also reduce the amount of reflected light on the screen.
• Therefore, limiting the ambient light acting on the screen is the best way.

2.How far is the distance from the screen?

• The answer to this question will determine what screen you need.
• Generally, the height of the screen should be about one fifth of the distance of the student’s distance. For example, if the student is at a distance of 9 meters, the height of the screen should be 1m8 (100 inches).
• If the student seat area is quite high, the bottom of the screen should be about 1 meter from the floor.
• If you move into the back seat of the classroom, do not move over the projection area, the screen may be slightly lowered.

3. Where can you place the projector?

• Ideally, you want your projector to be in a place where your students can not intentionally or accidentally block the light from the projector by their movements or look directly into the projection lens.
• One solution is to mount the projector on the same wall as the projection screen or very close to the wall, as this will remove the projector from the seating area.
• It can be done with close-up projector or super-close projector. This helps the teacher to travel freely, teaching without worrying about dazzling as well as covering the content on the screen.
• Either use a conventional projector but use a ceiling mount, a desktop, but far away from the near and super-close.

4.How do we optimize the number of projectors required?

• First you need to determine the intensity of the projector light, the distance from the projection screen to the point where you want to place the projector.
• This decision may be affected by the location of furniture, lighting, work desks, or anything else that may interfere with the installation of the projector or the light path from the projector to the monitor. .
• Determining the brightness and distance you will reduce the number of projectors that can meet your requirements.