The video projector is the best way to improve the quality of a home theater: it allows to obtain a larger image and to recreate the impression felt in a real cinema room. By mounting the projector on the ceiling or on the wall, you will make your installation look clean and professional, but you will also save space. For a projector on the wall or ceiling, you need to consider various parameters, including screen size and room size, as well as projection distance and vertical offset (which you will find in the user guide of device). Use the tips below in addition to the guide to make sure you install your projector correctly on the wall / ceiling.
Part 1 of 3: determine the location of the screen
Step 1. Choose the location of the screen
Depending on the configuration of your room, your options will likely be limited. However, you should choose a wall that is protected from direct light, as the screen image may appear washed out.
- If you have no choice but to mount your screen on a wall exposed to direct light, opt for a projection screen that rejects ambient light. If you are projecting your image directly onto the wall, use paint that rejects ambient light (you can find it in hardware stores).
- Also consider purchasing full occlusion curtains for your windows.
Step 2. Determine the height of your screen
Again, everything will depend on the configuration of your room. If you only have a sofa and a few chairs (which aren't placed next to each other like in a movie theater), the correct height is between two and three feet from the floor.
- If you have more than one row of chairs in your home theater, you will need to position your screen a little higher so that those farthest away can see the projected images or movies.
- When determining the height of the screen from the ground, you should always consider its size. If the screen is very large and you place it too high, it will not be able to fit on the wall.
Step 3. Know how big your screen is
How tall and how wide is the screen you plan to use to project your images? Keep these dimensions handy, as you will need them when choosing a location for your projector.
Most recent projectors are able to create a sharp image that is 250cm wide. If you do not know which screen size to choose and if your room allows it, opt for a projection surface of this size
Part 2 of 3: determine the location of the projector
Step 1. Calculate the throw distance of your projector
Projection distance is the distance between your screen and the lens of your projector. You can calculate it using the throw ratio of your device (which should be stated in the user guide as a number for projectors without optical zoom and a series of numbers for others). To find out how far away from your screen to place the projector, use the following formula: throw ratio x screen width = throw distance. The formula is valid for all units of measurement: inches, centimeters, feet, etc.
- If you have a screen of 250cm and a projection ratio of 1, 4: 1 to 2, 8: 1, your projector will be placed between 350 cm and 700 cm away. The calculation is done like this (for a ratio of 1, 4: 1): 1, 4 x 250 cm = 350 cm.
- You can also use another formula. If you are looking for a screen size suitable for the throw distance of your projector, the calculation is done by dividing the throw distance by the throw ratio. You get the screen size to buy.
Let's say you want to place your projector 480cm from your screen and the device has a ratio of 1.4: 1 to 2.8: 1. Using the lowest ratio (1.4: 1), you have 480cm divided by 1, 4 and you get a little over 340cm. Since the ratio is up to 2.8: 1, you can choose a screen size of 170-340cm
Step 2. Determine the best throw distance for your projector
Once you have found the projection distance for your projector, you can consider your room and choose a location where the device can give optimum picture quality. During this step, you should consider the following factors.
- The location of spectators. If your projector is very large or very heavy, avoid placing it directly over their heads.
- The power supply and wiring of the projector. Most projectors have two cables: an HDMI cable and a power cable. You need to make sure that your device is close enough to an outlet or that your cable / extension cord is long enough.
- The quality of the image. Even if your projection distance is correct, the image quality may not be perfect. You need to find the distance that works best for you before you fix the projector permanently. A small distance (the projector is close to the screen) will give a clearer image and a greater distance (the projector is far from the screen) will give a more vivid image with more contrast.
Step 3. Determine the vertical offset of your projector
The vertical offset is the orientation up or down of the projector in order to obtain an image adapted to the height of the screen. It is listed as a percentage in your user guide. A positive offset (eg +96.3%) means the image will be projected higher than the lens while a negative offset (eg -96.3%) means it will be projected lower. If the projector is mounted upside down, you should opt for a positive offset.
- Most projectors have a vertically shifting lens that allows you to adjust the height of the image without having to move the device. If your projector has one, place it at different heights while moving the lens to see where it gives the best picture quality.
- If your projector does not have a vertically shifting lens (in the case of a fixed vertical offset), you will need to place it exactly at the recommended height.
Step 4. Calculate the vertical positioning of your projector
To calculate the vertical positioning of your projector, use this formula: screen height x percentage offset = distance of the lens above / below the middle of the screen.
- The following example applies to a projector with an offset of -96.3% to +96.3%:
- A high definition projection screen has a ratio of 1.78: 1 (16: 9), which means it is 1.78 times wider than it is tall. If your screen is 250 cm wide, its height will therefore be 140 cm,
- the calculation is done as follows: 140cm (the height) x 96.3% (the offset, if your calculator has no% symbol, use 0.963) = about 135cm,
- this means that the projector can be placed anywhere 135cm above and 135cm below the middle of the screen.
Step 5. Determine the horizontal displacement of the lens
It is advisable to install the projector so that it is aligned with the middle of the screen (widthwise), but if your room configuration does not allow it, you will need to calculate the horizontal displacement of your lens. The calculation of the horizontal lens shift is similar to that of the vertical shift except that you use the following formula: screen width x percentage offset = distance of lens left / right of middle of l 'screen.
It is advisable to avoid the use of horizontal lens shift as much as possible. Your image may be distorted and your changes may interfere with the vertical movement of the lens
Part 3 of 3: install the video projector
Step 1. Choose a mount suitable for your projector and room
The supports vary according to their destination (on the ceiling or on a wall), the availability or not of devices allowing to adjust the height of the image and the type, size and weight of the video projector intended to be there. fixed. You must take this into account when choosing.
- Buy something sturdy and of good quality. Low-end mounts are more likely to misalign over time and your projector (as well as your image) will no longer be aligned with your screen.
- You will need to purchase adapters for your bracket depending on your type of ceiling. For a suspended ceiling (which is not attached to the ceiling structure and therefore cannot withstand heavy loads), purchase a suspended ceiling kit. For a cathedral ceiling (high and vaulted), purchase a cathedral ceiling adapter.
Step 2. Attach the bracket
Connect a suitable support to your video projector. Follow the instructions that came with the stand kit and your projector. Make sure the bracket tray is level with the projector when attached. Also make sure that the bracket is securely attached to the projector before attaching it securely to the wall / ceiling.
Step 3. Calculate the distance between the holder and the lens
Calculate the distance between the mount and the lens and adjust the throw distance accordingly. Use a tape measure to determine the distance from the middle of the mount to the front face of the projector lens. Add the length obtained to the acceptable distance range between the lens and the screen (for example, the projection distance).
If the distance between the holder and the lens is 15 cm, the new projection distance will be 495 cm, if it was initially 480 cm
Step 4. Securely mount the projector
Use a stud finder to locate the available roof studs between the screen and the projector. Secure the bracket securely to the upright you have chosen using a screwdriver, a wrench and two lag screws.
- Lag screws (also called wood screws) with a flat, hexagonal head as well as a cylindrical and threaded shank provide better fixation. They can be screwed directly into wood, but also into concrete using a dowel. The lag bolts used for the installation of your projector should be 7.6cm long and 7.9mm wide (unless specific dimensions are indicated in the stand manual).
- To use a stud finder, you simply run it along the wall until its indicator alerts you to the presence of a stud. You will certainly find detailed instructions in the manual of the device.
- If you cannot find joists where you want to install your projector, you will either need to look for another location or install a piece of wood that crosses the space between the two joists. If possible (for example if there is an attic above), hide the wood inside the ceiling.
Step 5. Secure the cables
Connect the cables to the projector by following the instructions in the user guide.
- Use a grommet (or cable cover) to hide the wires that run from your device to the electrical outlet. You will need to find it at the nearest hardware store.
- If you don't mind the visibility of the cables, but you still want them tidy, you can secure them to the wall in some places using cable brackets and clips (also available at the hardware store). nearest to you).
Step 6. Adjust the projector to sharpen the image
Turn on the projector and follow the instructions in the user guide to adjust the zoom as well as lens shift and focus on certain settings. Refer to the guide to change the contrast, color and brightness of the device.