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How to determine the position of the projector for a given screen size

1.Select your screen size.

2.Refer to the table and find the closest match to your screen size in the left columns labelled "4:3 screen diagonal". Using this value, look across this row to the right to find the corresponding average distance from screen value in the column labelled "Average". This is the projection distance.

3.On that same row, look across to the right column and make note of the "Vertical offset in mm" value. This will determine the final vertical offset placement of the projector in relation to the edge of the screen.

4.The recommended position for the projector is aligned perpendicular to the horizontal center of the screen, at the distance from the screen determined in step 2 above, and offset by the value determined in step 3

above.

For example, if you are using a 120-inch screen, the average projection distance is 4416 mm and with a vertical offset of 210 mm.

If you place the projector in a different position (to that recommended), you will have to tilt it down or up to center the image on the screen. In these situations, some image distortion will occur. Use the Keystone function to correct the distortion. See "Correcting keystone" on page 29 for details.

How to determine the recommended screen size for a given distance

This method can be used for situations where you have purchased this projector and would like to know what screen size will fit in your room.

The maximum screen size is limited by the physical space available in your room.

1.Measure the distance between the projector and where you want to position the screen. This is the projection distance.

2.Refer to the table and find the closest match to your measurement in the average distance from screen column labelled "Average". Check that your measured distance is between the min and max distances listed on either side of the average distance value.

3.Using this value, look across that row to the left to find the corresponding screen diagonal listed in that row. That is the projected image size of the projector at that projection distance.

4.On that same row, look across to the right column and make note of the "Vertical offset in mm" value. This

will determine the final placement of the screen in relation to the horizontal plane of the projector. For example, if your measured projection distance was 4.5 m (4500 mm), the closest match in the "Average" column is 4416 mm. Looking across this row shows that a 120-inch screen is required. If you can only obtain metric sized screens, the listed screen sizes on either side of the 120-inch screen are the 3.0 m (3000 mm) and 3.5 m (3500 mm) screens.

Checking the min and max projection distance values for these screen sizes, indicates that the 4.5 m measured projection distance will also fit the 3.0 m (3000 mm) size screen. Be aware that these different screens have different vertical offset values.

There is 3% tolerance among these numbers due to optical component variations. BenQ recommends that if you intend to permanently install the projector, you should physically test the projection size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your installation location.

14 Positioning your projector

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BenQ SP920 user manual Select your screen size
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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.
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