Luma SMD Resources page

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Product Brochures

Click on the product name to download the respective PDF brochure

Product Selection

Location

Indoor or outdoor? IP ratings

LED Screens designed for outdoors are built to withstand water and dust from damaging their components arising from typical usage. In most cases the front of the screens are “sealed” from dust and water sprayed from all directions for a minimum of 10 minutes without causing damage *IP65 rated

In many situations the electronics must be able to dissipate heat and are open and ventilated to some degree at the rear. This ventilation can be either fan-based or a valve system that allows them to exhaust heat. This requirement including cables and power supply etc often means that LED screens are less “waterproof” on the rearward side and may be suited to a weather covering or awning for added protection. Understanding IP Ratings is important for selecting the right product.

Application

Size and usage ie. road signage, waypoint, HD vidio, retail

Whether it is a giant billboard, a 10m backdrop to a rock concert, or a waypoint sign or banner, each application has specific limitations and requirements. The selection process may be governed by the minimum panel size limits, the type of display you require or the type of content being displayed. Many panels are in simple configurations, often 1 metre x 1 metre squares, but some products are more flexible and can be made up of a mixture of larger and smaller panels to achieve the right size for the space you have available. There are even panels that are nearly infinitely scalable, even bendable and you can do shapes and curves depending on the desired effect.

If you are not sure ASK OUR TEAM for their advice. Selecting a cheaper screen might not be the right answer, similarly going for a “better” or finer pitch may be a waste of time with a large viewing distance.

Content

fine detail or bold large fonts, HD video or static images

It is also important to consider the anticipated content before deciding on the final product. Do you need large bold lettering displaying pricing or specials, eye-catching graphics or HD Video, or do you need ultra-fine detail to get your message across. High Definition displays look amazing but can add many thousands of dollars to a project so careful consideration needs to be taken.

Viewing distance & pixel pitch

calculating comfortable viewing distance and letter height vs distance formulas

What is Pixel Pitch?
Pixel pitch is the distance between individual LED chips on a panel represented in mm ie. P 4.5 = 1 pixel every 4.5 mm

Rough Guide
Pixel pitch x 1.3 = minimum comfortable viewing distance (m) ie. P4 (4 mm pixel pitch) would look good beyond 5-6 m for finer detail. This guide is generally adopted by LED Manufacturers as a starting point.

Minimum Viewing Distance
Minimum viewing distance is greatly limited by Pixel Pitch. To determine the right pitch, you need to decide if the viewers are walking or driving past your sign, or standing stationary in front watching it for 20 minutes or more. This is especially important if you were designing a cinema or environment where the viewer are looking at the screen for an extended period.

Maximum viewing time
As well as considering the content, the size and the application, you may need to consider the minimum legible viewing distance, and also the time the reader might have to read the sign. This is particularly important in the case of road-side signage. There is little point having long explanations on a sign by a fast moving Highway when the average time a viewer can understand it is only a few seconds.

Luckily there is a handy font-size calculator to determine the right size lettering and the local or passing traffic speed. It gives you an easy guide to designing the right banners and what font size you should be using.

Brightness

explaining nits

It takes a lot of brightness to compete with sunlight and even the brightest screens will struggle in full sunlight. One of the main reasons LED and more especially SMD Technology has only started to be used in the past few years, was due to the maximum brightness that came from early LED-PID diodes. Multi-colour and super bright SMD chips have allowed this market to become an extremely versatile and efficient source of light and has easily adopted to the many digital signage options in the market today.

The brightness of a screen is often referred to using the unit of “Nits” originating from a computer term meaning: “Network Investigative Technique”.

A unit of measurement of luminance, or the intensity of visible light, where one nit is equal to one candle per square meter. Nits are used to describe the brightness of computer displays, such as LCD and CRT monitors and have been adopted by the LED Manufacturers to identify the maximum brightness of their products. Brightness is measured in candelas per meter squared (cd/m2) or nits. A 300 nit desktop monitor has the light power of 300 candles lighting a square meter of space whereas a 6000 Nit LED screen can illuminate a square meter with the relevant candle brightness of 6000 candles, scented or unscented.

NITS IN SIMPLE ENGLISH

Indoors 300- 800 nits is common for LCD screens but under 1000 nits is suitable for LED SMD screens and most indoor screens are run on 30-50% brightness which extends their life span and does not dazzle the viewers

Partial Sun/Shade 800+ is more suitable, depending on the amount of direct sunlight and other competing glare etc.

Full Direct Sun 5000 Nits or more is preferred for clear viewing in direct sunlight.

Important! Signs that are viewable from the road must have the ability to reduce their brightness after dark so as to not cause nuisance to road users or local residents.

Regulations

local government regulations for size, placement, height & brightness

Finally (and most importantly) you also have to understand your local government regulations for signage and if a resource consent, engineers report, or building application needs to be obtained before ordering your products.

Many regions have strict guidelines on maximum size, height and position and even brightness. This information is usually easy to find in your local government building code or regulations booklet.

A quick call to your local building authority could save you thousands of dollars, if you make a mistake. Be sure to find out WHO can be held responsible for an illegal sign, as it may be the responsibility of the contractor or installer to ensure the permits have been satisfactorily obtained. Before proceeding on your selection you should consult with the local authority and make sure your plans are within their guidelines.

Here are some examples of building regulations with regards to signage. Auckland City Council have tons of information readily available..

Warranty

Luma SMD Panels are aged at the factory to reduce the possibility of DOA pixels, a common problem with some manufacturers. Due to shipping and handling during installation there is a chance that some modules will show dead or blank pixels. We will happily replace any faulty modules within the first 6 weeks and cover the overall integrity of our screens with a 3 year warranty. We also include 5% spare SMD chips with your order to cover any damaged or faulty components that may occur within the life of your product.

Should any manufacturing fault occur within that period we will endeavour to repair or replace the affected parts on a “back-to-base” arrangement.

Our LED screens have a *life expectancy of up to 100,000 hours and over this period you would expect a gradual change in brightness and color however this generally would not render the product unusable. Not all components in a display have the same life expectancy and environmental factors also have an impact on the product lifespan. Please contact your dealer for more detailed information.

Disclaimer: This information is designed to assist you with the understanding of a wide range of products and is not specifically aimed at any particular item. For legal purposes we instruct you to look at the warranty information supplied with individual components at the time of sale.

All warranties are held through Luma AVC in New Zealand and Australia and are fully backed and supported locally.

Service Level Agreement

We also have Service Level Agreements where we can assure the ongoing integrity of your product through our local technical support teams.

Modern SMD-LED chips are capable of lasting for over 100,000 hours or around 11 years of continuous operation, if maintained and serviced appropriately. Although we are very confident your screen will be working well past its 3 year warranty we strongly recommend an annual service procedure involving module removal, cleaning, colour balancing and correction if required and re-applying protective coatings to all cable-joins/plugs and terminals. Maintaining your investment gives you peace of mind and most of our clients select our Automatic Service and Support arrangement. We will regularly inspect the screen for any damage or dropped pixels, if we find any issues we will generally repair them on the spot. Once a year we will arrange an appropriate time to complete your annual service. You don’t have to think about whats happening, it all gets taken care of by our expert technicians.

Our Priority Service Customers have even more urgent requirements and we will drop what we are doing if they have an equipment failure 24/7. Operation centres, Television stations and Emergency Services can rely on our immediate call-back service and we personally tailor a package to suit your own requirements. Protection Prevents Problems

Terms and Conditions

In order to keep your costs at a minimum we ask for a deposit of 50% of the total product cost at the time of the initial order and the 50% balance paid before the product leaves our factory in China.

In general please allow 4 weeks for manufacturing and a further 2 weeks for sea-freight to mainland NZ and Australia. Air freight can be arranged at extra cost.

Due to international currency fluctuations we often quote in US Dollars. Please confirm if you would like your quotes in US Dollars or your local currency prior to your order.