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Contrast Ratio

Screen contrast ratio is a statistic that measures light and dark. Compare the luminance of the brightest white and darkest black on a screen to determine the contrast ratio. A 1000:1 contrast ratio indicates the brightest white is 1000x brighter than the darkest black. Thus, a high contrast ratio produces a stunningly detailed image. 

If there isn’t a noticeable enough distinction between white and black, it could be difficult to view the rich cinematic content in the home theatre, where ambient light is usually present.

Resolution

Resolution is the number of pixels used to show a picture. Higher resolutions use more pixels, creating crisper, cleaner images. Projecting comprehensive charts, graphs, text, and HD video requires high resolution. A number combination like 1920 x 1200 indicates resolution. This means the screen image has 2,304,000 dots, 1920 horizontally and 1200 vertically.

• Lower-resolution SVGA (800×600 pixels, 4:3 aspect ratio) projectors are cheaper and suited for presenting small amounts of information, charts, and video clips.
• XGA (1024×768 pixels, 4:3): Popular. Most computers use XGA as their native resolution, hence XGA projectors are widespread.
• WXGA (1280×800 pixels, 16:10 aspect ratio): WXGA is XGA’s widescreen variant, matching vertical resolution but adding 20% horizontal resolution. This is a typical notebook and smartphone resolution.
• High-end notebooks and workstations are using WUXGA (1920×1200 pixels, 16:10 aspect ratio). In addition, WUXGA is used for installation projectors and huge venues that need bright, HD information.
• The most common format for cheap movie projection is 720p (1280×720 pixels, 16:9). It matches 720p HDTV. 
• Standard home theater format is 1080p (1920×1080 pixels, 16:9 aspect ratio). It matches Blu-ray and 1080i/1080p HDTV.

Throwing Distance, Position

The arrangement of your room will dictate the placement of the projector and the size of the image. Therefore, you must examine the throw distance and projector capabilities that provide placement flexibility. Projector throw distance is the distance between the projector and the screen picture (the image is “thrown”).

• Long Throw: Projectors mounted in the centre of the ceiling in large rooms can produce very large images.
• Short throw projectors on the wall or ceiling near the wall project huge images while reducing shadows and eye glare. Short-throw projection ranges from 1m to 2.5m from projector to screen.
• Ultra-short throw : This throw avoids shadows and eye glare from projectors on the wall, the ceiling near a wall, or a table projecting downwards. Ultra-short throw projection is 0–1.2m from projector to screen.

Wireless or Wired

• A wireless-ENABLED projector. This indicates that the projector includes an 802.11 b/g/n wireless LAN. As soon as the included LAN module is inserted, the projector will begin wireless projection.
• A wireless projector as an option; to initiate the wireless function, one must acquire the wireless LAN module. Wireless projection is possible by simply connecting the purchased LAN module to the projector.

Technologies for Projections

The two most common types of projector technology are 1-chip DLP and 3-chip 3LCD.

• The 3-chip 3LCD technology provides energy-efficient projection while still producing vivid, lifelike images. In addition to a high white brightness, 3LCD projectors also feature a high colour brightness. 
• Compared to 3LCD technology, the colour light output of 1-chip DLP technology is lower since it uses a spinning colour wheel to render colour. 

Interactivity

You get all the benefits of an interactive whiteboard—interactivity, mobility, and affordability—in a single device with the projector and pen. You can project without glare or shadow using an interactive projector with a short-throw or ultra-short throw distance. Using interactive features, you can display and annotate content from various sources, as well as make big or tiny interactive areas with interactive pens for navigating, clicking, and drawing.

Image Alignment and Modification

Using a projector becomes a breeze when it provides easy control over image alignment.

• Adjustments made manually should only require a few steps to complete. You can avoid navigating the menu by using the projector’s physical adjustment button or slider. 
• A far more significant advantage is automatic adjustment, which permits immediate alignment without requiring any sort of user intervention.
  The majority of projectors allow for some level of adjustment, however some are more sophisticated than others. Some ways to set up your projected image include features like as horizontal and vertical keystone correction, screen fit, zoom, quick corner, optional lenses, and horizontal easy-slide image correction .

Connections

A wide variety of connectors, including Display Port, Component, USB, and VGA, are available for use with projectors. With the right adaptor, you can make many different kinds of connections work with each other.

Projection via a Network 

For purposes such as digital signs, meetings, and presentations, content can be transmitted from a computer to a projector via a network. Your options with the Easy MP Network Projector program are:

From a single computer, you can send one or more images to various projectors. Presenters can share the projector without having to swap cables. One projector can be linked to as many as 16 computers.