Projection Screen
You can buy in Saudi Arabia rear projection and front projection screen. Company Comboglass in KSA supply two types of projection screen, rear projection screen or front projection screen. Clarity of picture on both types of projection screen depends on quality and resolution of projector.
Rear projection screen means that picture appears on other side of glass than projector. Rear projection film can be both type
1. Rear projection screen on Smart Glass(switchable glass)
2. Rear projection screen on transparent or milky white interlayer.
Front projection screen means that picture appears on the same side as projector. Front projection screen you can buy in Saudi Arabia both types milky white or transparent.
Projection options
When the projector stands on its feet, this is called a vertical or front projection. When the projector is attached to a ceiling mount by its bottom and turned over — this is a ceiling projection. When projecting on a special rear projection screen, the projector is placed behind the screen — this is a rear projection.
For each of these uses, the appropriate mode must be selected in the projector menu so that the image would be properly positioned, if necessary. Vertical projection on the floor or ceiling, and portrait projection when the projector is placed on its side, are also available. The last two options are special features and may not be supported. Another feature is the projection at any angle (360 degrees). Non-conventional installation options are often required for installation projectors.
Original resolution
The resolution of the projector’s matrices (vertical and horizontal dots), which determines the maximum possible image sharpness. The resolution is selected according to the source resolution (e.g. computer) or the resolution of the video format the user wishes to display.
Supported resolutions
Resolutions the projector is ready to accept and then convert to its original resolution. The signal resolution may be higher or lower than that of the projector. Sometimes the resolution format is not specified as 1920×1080, but as 1080i or 1080p. I (interlaced) means that the picture is refreshed through interlacing — even lines go first, followed by odd lines. P (progressive) means that each frame of the image is refreshed completely.
As a result, such a designation (480i, 1080p, etc.) is about signal transmission format rather than resolution. When receiving interlaced video, the projector must be able to perform a high-quality deinterlacing, otherwise there will be a «comb» in scenes with motion. Another characteristic of the signal is the number of frames per second. For example, at high resolutions, such as 4K, the projector’s ability to accept 60 frames per second is emphasized.
Image Format
The screen width to height ratio means how the image is stretched horizontally. Modern video systems use a square pixel, so the format (aspect ratio) is calculated by dividing the horizontal resolution by the vertical resolution. The image format is useful for calculating the screen size. The most popular formats are 4:3, 16:9, 16:10, 2,35:1. The 4:3 format may be more convenient for viewing portrait-mode document pages, while 2,35:1 is a merely widescreen movie format. The HD (TV and Blu-ray) format has an aspect ratio of 16:9, so movies in a different format will fit inside this 16:9 frame, and the unused space will be displayed as black bars.
Supported image formats
As a rule, frame format may be set manually in the projector menu. The projector is able to recalculate any image by displaying it with the desired aspect ratio. The projector’s ability to support various resolutions also means that the signal is displayed in the correct format. However, when using a frame format that is different from the original (inherent in the projector), the letterboxing effect (black bars of unused space) will occur.