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.

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 diagrams on pages 17-20, 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 tables of 16:9-aspect-ratio and 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).

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

1.Determine the aspect ratio of your screen, 16:9 or 4:3? If you have a 16:9 screen, refer to page 17 or 18. If you have a 4:3 screen, refer to page 19 or 20 depending on the projected picture aspect ratio you’ve got.

2.Select your screen size.

3.Refer to the table and find the closest match to your screen size in the left columns labelled "Screen Dimensions". 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.

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

5.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 3 above, and offset by the value determined in step 4 above.

For example, if you are using an 120-inch, 4:3-aspect-ratio screen and the projected picture is 16:10, please refer to Table B2 on page 20. The average projection distance is 4180 mm and with a vertical offset of 61 mm.

Positioning your projector

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BenQ MP730 manual Obtaining a preferred projected image size
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MP730 specifications

The BenQ MP730 is a high-performance projector designed to meet the diverse needs of business and education environments. Recognized for its exceptional image quality and advanced features, the MP730 offers a blend of functionality and ease of use, making it a popular choice among professionals and educators alike.

At the heart of the BenQ MP730 is its high brightness of 3000 ANSI lumens, which ensures vivid, detailed images even in well-lit rooms. This is especially beneficial in classrooms or conference rooms where ambient light can affect visibility. Coupled with a native XGA resolution (1024 x 768), the projector produces sharp and clear visuals, making it ideal for presentations, video conferencing, and educational uses.

The MP730 employs DLP (Digital Light Processing) technology, which enhances the projector's color accuracy and reduces the risk of image distortion. This technology also contributes to the overall reliability of the projector, with a longer lifespan for the lamp, enabling extended operational periods without the need for frequent replacements. Additionally, the 2000:1 contrast ratio ensures that images display rich blacks and bright whites, providing depth to presentations and videos.

Another notable feature of the BenQ MP730 is its extensive connectivity options. It includes VGA, composite video, and S-Video inputs, as well as USB connectivity, allowing users to easily connect various devices like laptops, DVD players, and mobile devices. The inclusion of a built-in speaker further enhances the projector's versatility, making it suitable for multimedia presentations without the necessity of external audio equipment.

User-friendliness is a core characteristic of the MP730. With features such as auto keystone correction, users can quickly adjust images for perfect alignment, while the built-in setup wizard simplifies initial configuration. The lightweight design of the MP730 also facilitates easy transportation, making it an excellent choice for traveling professionals or educators who need to move between different locations.

Moreover, the MP730 demonstrates an environmentally conscious design. Its energy-saving mode significantly reduces power consumption when the projector is idle, with features like the SmartEco technology optimally adjusting brightness to extend the life of the lamp while minimizing energy use.

In conclusion, the BenQ MP730 is a versatile projector packed with features that cater to the needs of business professionals and educators. Its combination of high brightness, rich color accuracy, multiple connectivity options, and user-friendly design makes it an excellent choice for anyone seeking a dependable and effective presentation tool.
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