Now lets be honest, have you ever thought you could use a projector in a well lit environment, say like outdoors and achieve a high quality bright image? If you said No it is impossible, then you are not alone. So why is it that people the world over still believe they need a incredibly powerful and VERY expensive projector? Even those in the audio visual industry believe that it is not possible, unless you go and spend $200,000 then you might get an image bright enough.
This week we astounded an number of people when we proved that it is not the projector that is the key to achieving a high bright image outdoors, which is contrary to what they have been told as long as they can remember. The screen is the absolute first point to consider, get this wrong and you will be chasing around in circles forever, trying to get an image that you can view in a well lit environment. The washed out image is so common it is come to the point that folk believe that simply the projector is not bright enough. To this we say they are 200% absolutely wrong and we can prove it before their very own eyes.
The point I want to draw your attention to in the above photo:
1 – Notice how the image is very bright on the left and right screen areas
2 – The middle white area you can barely make out any content
3 – A single projector is covering the full area
And yet we get a dramatically different type of image brightness display quality on the two screen surface areas.
First the point of adding the Matte White Screen section in the photo is purely for your direct comparative benefit. A matte white screen is the cloth material used on the bulk of screens world wide in Government meeting rooms, classrooms, offices, universities, home theatre. It typically has a rated Gain efficiency of Gain 1. This means the amount of light projected is reflected and displayed at 100%. (further detail about Gain below)
So the big question you are probably asking is, “How is that possible?” You have probably tried using the projector yourself with all the lights on, curtains open and know only to well that you have a poor quality image. Many churches realise this problem only to well where the projected words for songs and images are almost washed out.
The big misunderstanding people make is that they think the white or grey roll up screen (or tensioned screen) is the correct surface (their first mistake) and that they have come to expect the image will be washed our, lacking in contrast if any light is in the room from switched on lights of sunlight coming into the room. So you might say that people have come to expect in their thinking that the only way to solve this is to either sit in a darkened room or buy a far brighter projector (for which invariably no budget exists!)
An explanation of Gain (from Wikipedia)
A Gain of 1.0 means the amount of light that is projected on the screen returns to the viewer at the same brightness: none is absorbed and all is re-radiated with perfect uniformity from all viewing angles. If one was to isolate certain rays striking the screen, he/she would see the rays diffuse to form a perfect hemisphere shape. A block of magnesium carbonate (MgCO3) or a matte white screen will result in a gain of 1.0. This is fine in theory or in a dark room but for most applications projectors are not used in a dark room where a Matt White screen can perform at its best.
A screen with a Gain of 1.0 will reflect the same amount of light as that from a matte white screen. A screen rated at 1.5 gain will reflect 50% more light as from a matte white screen. A screen with a 0.9 gain will reflect 90% of the light compared against a matte white screen.
Gain is measured from the vantage point where the screen is at its brightest, which is directly in front and perpendicular to the screen. When the measurement is taken for light targeted and reflected perpendicular to the screen. Technically the measurement of Gain at this point is known as Peak Gain at Zero Degrees Viewing Axis. If you move to the side and view the screen at an angle the brightness of the projected image drops. The angle at which the gain reading drops to 50% of the peak value is known as the Half Gain Viewing Angle. A person viewing the screen from this angle will see an image half as bright as the person seated at the center position.
In the photo (above and below) taken outdoors early evening when the meter measured 73.5 lux. This is about the darkness that you might have also when in a home theatre setup. Take note of the lack of contrast on the matte white strip and the white cloth background and yet on the ICE screen the brightness is substantially larger. The reason is the Gain 20 factor performance of the screen surface efficiency.
Whilst we have shown the screen outdoors the ICE Digital daytime screen is not manufactured for permanent outdoor installations. If you use the ICE Daytime screen outdoors your results may vary according to many different factors.
Church auditorium screens
Office meeting rooms
Retail Advertising screen
Indoor Stadium screens
Score board screens
Virtual Reality Viewing
Used in conjunction with tablets and interactive screens the ICE Digital Daytime Lens Screen becomes the perfect large format screen to display the interactive output without having to actually touch the screen.
Important points to remember:
- ICE Digital Daytime Lens Screen can be used with any type of projector
- Makes any projected image up to 2000% brighter than using a Matte White Screen
- A Matte White screen only works when the environmental light is dramatically reduced.
- Long term you will always achieve a brighter image at a lower price than any other combination of screen or projector.
- Results can vary depending on many reasons.
- Cost wise, to achieve a high quality bright image in a well lit environment, you will always achieve it at a lower cost if you factor in a ICE Daytime Screen, than throwing money at a higher brightness projector with a Matte White Screens
- Our ICE Lens screen does not wear out and will always last longer than projectors.
If you have a project and a requirement where you need to make a dramatic difference in your projected images we look forward to hearing from. Call us on Tel +64-9-441 2348 (New Zealand) or email to sales at iceavglobal.com
We used a Digitech QM-1593 light meter for these measurements to provide some objectivity. Any inaccuracy in lux readings has no impact on the comparative views. Learn more about LUX levels here.