Obtaining a preferred projected image size

Obtaining a preferred projected image size

The distance from the projector lens to the screen, the zoom setting, and the video format each factors in the projected image size.

4:3 is the native aspect ratio of this projector. To be able to project a complete 16:9 (widescreen) aspect ratio image, the projector can resize and scale a widescreen image to the projector's native aspect width. This will result in a proportionally smaller height equivalent to 75% of the projector's native aspect height.

English

4:3 aspect image in a 4:3	16:9 aspect image scaled to
aspect display area	a 4:3 aspect display area

Thus, a 16:9 aspect image will not utilize 25% of the height of a 4:3 aspect image displayed by this projector. This will be seen as darkened (unlit) bars along the top and bottom (vertical 12.5% height respectively) of the 4:3 projection display area whenever displaying a scaled 16:9 aspect image in the vertical center of the 4:3 projection display area.

The projector should always be placed horizontally level (like flat on a table), and positioned directly perpendicular (90° right-angle square) to the horizontal center of the screen. This prevents image distortion caused by angled projections (or projecting onto angled surfaces).

The modern digital projector does not project directly forward (like older style reel-to-reel film projectors did). Instead, digital projectors are designed to project at a slightly upward angle above the horizontal plane of the projector. This is so that they can be readily placed on a table and will project forward and upwards onto a screen positioned so that the bottom edge of the screen is above the level of the table (and everyone in the room can see the screen).

If the projector is mounted on a ceiling, it must be mounted upside-down so that it projects at a slightly downward angle.

You can see from the diagram on page 15, that this type of projection causes the bottom edge of the projected image to be vertically offset from the horizontal plane of the projector. When ceiling mounted, this refers to the top edge of the projected image.

If the projector is positioned further away from the screen, the projected image size increases, and the vertical offset also increases proportionately.

When determining the position of the screen and projector, you will need to account for both the projected image size and the vertical offset dimension, which are directly proportional to the projection distance.

BenQ has provided a table of 4:3-aspect-ratio screen sizes to assist you in determining the ideal location for your projector. There are two dimensions to consider, the perpendicular horizontal distance from the center of the screen (projection distance), and the vertical offset height of the projector from the horizontal edge of the screen (offset).

Positioning your projector

SP920 specifications

The BenQ SP920 is a sophisticated projector designed for a variety of professional and educational applications. As a versatile option, it stands out due to its impressive imaging capabilities, robust connectivity features, and user-friendly operation, making it a reliable choice for presentations, lectures, and even home entertainment.

One of the key features of the BenQ SP920 is its remarkable brightness, boasting an output of 5,000 ANSI lumens. This powerful lumen rating ensures that images remain vivid and clear even in well-lit environments, making it ideal for large conference rooms or classrooms. The projector’s resolution is another highlight, with a native WUXGA resolution of 1920 x 1200 pixels. This high-definition quality supports detailed visuals, ensuring that text is legible and images are sharp, enhancing the overall viewing experience.

The SP920 employs advanced DLP technology, known for producing high contrast ratios and vibrant colors. The combination of 10,000:1 contrast ratio and BrilliantColor technology allows for a broader color spectrum and improved white balance. This results in stunning image quality, showcasing deep blacks and bright whites, as well as rich, color-accurate visuals suitable for a multitude of content types.

Connectivity is another area where the BenQ SP920 excels. It features multiple input options, including HDMI, VGA, and USB, allowing it to easily connect to various devices such as laptops, Blu-ray players, and gaming consoles. The built-in speaker enhances its convenience, providing decent audio quality without the need for additional external sound systems.

User-oriented features include a simple setup process with easy-to-navigate menus, making it accessible for individuals with varying levels of technical expertise. The projector supports vertical and horizontal keystone correction, enabling easy adjustments for an even and properly aligned image when projecting at angles.

In terms of longevity and maintenance, the BenQ SP920 is equipped with a lamp life of up to 4,000 hours in normal mode and an impressive 6,000 hours in Eco Mode. This extends the time between replacements, reducing operational costs in the long run.

Overall, the BenQ SP920 is an excellent choice for professionals and educators seeking a reliable, high-performance projector that delivers exceptional image quality and versatile functionality for various applications. Its combination of brightness, clarity, and connectivity options make it a valuable tool for any presentation setup.