How to choose your video projector?
So you want to purchase a video projector but you don’t know where to start in terms of making a selection. We are going to guide you by providing the key information you should know, and outlining the right questions to ask in order to choose the correct video projector.

What you should know

  • Projection ratio. One of the key characteristics of a video projector is its projection ratio, which is the projection distance divided by the image width. This means that, at a given distance, you will achieve a (min and max) image size that can be adjusted using the zoom (with the exception of short throw and ultra-short throw video projectors). For example, if the video projector has a ratio of 1.9 - 2.2 and it is positioned 4 metres from the wall, your image will have a minimum width of 1.82 m (4 divided by 2.2) and a maximum width of 2.10 m(4 divided by 1.9). 

  • Resolution. A video projector has another key characteristic: its native resolution. This refers to the number of pixels that make up the projected image, expressed as columns x rows. The higher the number of pixels, the better the resolution. The most common resolutions are: SVGA 800x600 pixels, XGA 1024x768 pixels, WXGA 1280x720 pixels, FULL HD 1920x1080 pixels, and finally, 4K 3840x2160 pixels. 

  • Output (lumens). You must also take the device’s output into account: the further the video projector is from the projector screen, the greater the required output in order to achieve a good brightness. If used exclusively as a home cinema, in the dark, an output between 1000 and 2000 lumens is sufficient. 

By taking into account these 3 characteristics, which are linked exclusively to your video projector, you must define the projection distance that allows you to produce a good image resolution, with sufficient brightness. In order to determine the projection distance, you must know the size of your image (which corresponds to the measurement in cm from the left to the right of the white canvas of your projection screen), which you multiply by the projection ratio of the video projector (minimum and maximum) and thus determine the minimum and maximum distance for the installation of your video projector.

CALCULATION EXAMPLE FOR THE PROJECTION DISTANCE
Before purchasing your equipment, it is important to define the size of the image based on your video projector and the projection distance, or, inversely, the projection distance based on your image size and your video projector.

Minimum projection distance = image width x minimum ratio = 3 x 1.95 = 5.85 m 
Maximum projection distance = image width x maximum ratio= 3 x 2.15 = 6.45 m

Basic questions to ask

1- For which use, domestic or professional, will you use your video projector? 
You need to project films, for a home cinema, or require professional projection for meetings, conferences, or in classrooms, with fairly regular or even intensive use. Depending on your requirements, we can recommend a suitable video projector, as their use is also linked to the lighting in the room. In fact, for a home cinema in a darkened room, 2000 lumens may suffice, however, if the room is somewhat brighter, then you must increase the limens and select a video projector with an output of at least 3000 lumens. For installation on a table, our ultra-compact pico or mini projectors project an image ranging from 19” to 120”. If you use your video projector very frequently, choose a laser projector without a lamp, which may be limited in terms of the number of hours of use. 

2- Is your room dimly lit or very bright during projection? 
In the case of a dimly lit room, choose an output of around 2000 lumens, but if the room is bright to very bright, you will have to increase the lumen output. A minimum of 3000 will be required for a well lit room and you can increase this to 5000 if the room is very bright. 

3- What size of image will be projected by your video projector? 
Here too, the larger the projected image, the the higher the output brightness you will require, i.e. in lumens. This is why, in large theatres or conference halls with large screens in excess of 4 metres, you will find very powerful video projectors with an output of as much as 50,000 lumens! Our video projectors have a maximum output of 6200 lumens, meaning they are better suited for screens with a maximum size of 3 metres, with a maximum projection distance of 10 metres, in a room with moderate lighting. 

4- What type of content do you wish to project with your video projector? 
Depending on the content to be projected, you will have to carefully choose your video resolution. For a film or video game, we recommend that you choose a video projector capable of projecting in WUXGA or Full HD, however, if you wish to project Excel tables, diagrams or business data, a simple XGA resolution will suffice. 

5- What ports should your video projector have? 
On the back of your video projector there are several ports, which allow you to connect various devices to your projector. All of our video projectors are equipped with VGA, HDMI (up to 3), USB, DVI, RJ45 and RS232 ports.

> See the Kimex connexions

Our team remains at your disposal for any information you may require, and will support you in your projects.

How to choose your video projector?
So you want to purchase a video projector but you don’t know where to start in terms of making a selection. We are going to guide you by providing the key information you should know, and outlining the right questions to ask in order to choose the correct video projector.

What you should know

  • Projection ratio. One of the key characteristics of a video projector is its projection ratio, which is the projection distance divided by the image width. This means that, at a given distance, you will achieve a (min and max) image size that can be adjusted using the zoom (with the exception of short throw and ultra-short throw video projectors). For example, if the video projector has a ratio of 1.9 - 2.2 and it is positioned 4 metres from the wall, your image will have a minimum width of 1.82 m (4 divided by 2.2) and a maximum width of 2.10 m(4 divided by 1.9). 

  • Resolution. A video projector has another key characteristic: its native resolution. This refers to the number of pixels that make up the projected image, expressed as columns x rows. The higher the number of pixels, the better the resolution. The most common resolutions are: SVGA 800x600 pixels, XGA 1024x768 pixels, WXGA 1280x720 pixels, FULL HD 1920x1080 pixels, and finally, 4K 3840x2160 pixels. 

  • Output (lumens). You must also take the device’s output into account: the further the video projector is from the projector screen, the greater the required output in order to achieve a good brightness. If used exclusively as a home cinema, in the dark, an output between 1000 and 2000 lumens is sufficient. 

By taking into account these 3 characteristics, which are linked exclusively to your video projector, you must define the projection distance that allows you to produce a good image resolution, with sufficient brightness. In order to determine the projection distance, you must know the size of your image (which corresponds to the measurement in cm from the left to the right of the white canvas of your projection screen), which you multiply by the projection ratio of the video projector (minimum and maximum) and thus determine the minimum and maximum distance for the installation of your video projector.

CALCULATION EXAMPLE FOR THE PROJECTION DISTANCE
Before purchasing your equipment, it is important to define the size of the image based on your video projector and the projection distance, or, inversely, the projection distance based on your image size and your video projector.

Minimum projection distance = image width x minimum ratio = 3 x 1.95 = 5.85 m 
Maximum projection distance = image width x maximum ratio= 3 x 2.15 = 6.45 m

Basic questions to ask

1- For which use, domestic or professional, will you use your video projector? 
You need to project films, for a home cinema, or require professional projection for meetings, conferences, or in classrooms, with fairly regular or even intensive use. Depending on your requirements, we can recommend a suitable video projector, as their use is also linked to the lighting in the room. In fact, for a home cinema in a darkened room, 2000 lumens may suffice, however, if the room is somewhat brighter, then you must increase the limens and select a video projector with an output of at least 3000 lumens. For installation on a table, our ultra-compact pico or mini projectors project an image ranging from 19” to 120”. If you use your video projector very frequently, choose a laser projector without a lamp, which may be limited in terms of the number of hours of use. 

2- Is your room dimly lit or very bright during projection? 
In the case of a dimly lit room, choose an output of around 2000 lumens, but if the room is bright to very bright, you will have to increase the lumen output. A minimum of 3000 will be required for a well lit room and you can increase this to 5000 if the room is very bright. 

3- What size of image will be projected by your video projector? 
Here too, the larger the projected image, the the higher the output brightness you will require, i.e. in lumens. This is why, in large theatres or conference halls with large screens in excess of 4 metres, you will find very powerful video projectors with an output of as much as 50,000 lumens! Our video projectors have a maximum output of 6200 lumens, meaning they are better suited for screens with a maximum size of 3 metres, with a maximum projection distance of 10 metres, in a room with moderate lighting. 

4- What type of content do you wish to project with your video projector? 
Depending on the content to be projected, you will have to carefully choose your video resolution. For a film or video game, we recommend that you choose a video projector capable of projecting in WUXGA or Full HD, however, if you wish to project Excel tables, diagrams or business data, a simple XGA resolution will suffice. 

5- What ports should your video projector have? 
On the back of your video projector there are several ports, which allow you to connect various devices to your projector. All of our video projectors are equipped with VGA, HDMI (up to 3), USB, DVI, RJ45 and RS232 ports.

> See the Kimex connexions

Our team remains at your disposal for any information you may require, and will support you in your projects.