LED Facts & Information
A light-emitting diode (LED) is a semiconductor device. You can see it as an electronic device that permits current to flow in One direction. And it illuminates when electricity passes through it. It is typical that LED's expected life is 100,000 hours.
A pixel (short for picture element) is an image component of an LED display's overall resolution. The more pixels used to represent an image, the higher the resolution is to offer greater picture quality. In an LED display, a pixel can consist of 1 (one) or more LED diodes. A monochrome or grayscale LED display pixel has 1 (one) or more LED diodes of the same color. A color LED display pixel either has LED diodes of different colors or 1 (one) single diode which contains semi-conductor chips that emits lights with different colors.
A pixel is a point of light and the smallest element of an LED display. An LED display is manufactured by an array of pixels. Pixels are capable to present letters, graphics, animations and videos.
The Hybrid pixel technology was the first hot swappable LED display pixel of any kind in the US market and is still the leading technology of its kind. Each Hybrid pixel unit has a mini circuit board inside and individual gold plated pin connecting the unit to the display surface of the hybrid unit. Instead of 1 (one) single horizontal glare protection louver over a huge quantity of LED diodes, individual louvers for each LED diodes are used, creating maximum glare reflection and reflection protection as well as contrast enhancement and light focusing. The uneven display area surface as a result of utilizing the Hybrid pixels further enhances a display's contrast under direct sunlight.
Pitch is a terminology to determine the resolution of the LED display. Pitch is the distance from the center of a pixel to the center of an adjacent pixel. Pitch is very important because for the same display area, the pitch determines the resolution of the display. For smaller, tighter pitches, you have more pixels per unit area thus a better resolution. Selecting the right pitch when you are purchasing an LED display may save you money as well as getting you the appropriate resolution for your particular application. The smaller the pitch, the higher picture resolution will be represented because of more pixels per area. On the contrary, the bigger pitch size, because of less pixels, will represent lower picture resolution.
Please see the example below.
What does Master / Slave mean?
Master / Slave refers to a display's configuration. One side, the "Master", acts as the display's main control center and relays messages to the "Slave" side of the display. When a display is shipped as a "Master / Slave", it contains two single sided displays that are configured to work as one.
An LED display's matrix resolution represents how many pixels there is on the display. A display with a matrix resolution of 320 (h) by 480 (w) - means it has 480 pixels from side to side and 320 pixels from top to bottom. The higher the matrix resolution is, the better and image is represented on the display. As we discussed in "What is Pitch", for a fixed display area, selecting a smaller pitch will increase the matrix resolution of the display which means better image quality.
Nit is the brightness measurement unit the industry usually uses to measure luminance over a square meter. It is also well-known as meter-lamberts. NIT + meter-lamberts + candela per square meter (cd/m2). or NIT + cd per pixel X pixels per M2.
Did I confuse you yet?? :)
At nights, generally speaking, LED displays are always readable and working fine. However, to ensure your LED displays is readable and outstanding against sunlight during day times - is the key is to turning the traffic to to your business 24 / 7. So, this is why Brightness matters.
Typically, the average sunlight brightness in North America is about 5000 Nits. It does not take a Einstein to figure that in order to have a readable display during daytime, an outdoor LED display needs to be at least 5000 Nits bright after the initial 20% brightness degradation. Therefore, when you are purchasing your LED display for your customer, it is important to compare the brightness of displays from different manufacturers under sunlight - to make sure you are getting their money's worth and your customers will be happy your did - especially when their customers can notice their sign while driving by during the day.
Two perspectives to know why choosing LED display:
- Cost Effective Advertising Medium.
- Level of return on your Investment.
"For business that choose to enhance their signage with an electronic message display, the owners typically see an increase in business of 15% to 150%."
United States Small Business Administration on Signage for business
Monochrome displays
Enable shades of a single color in Red or in Amber. If you are looking for a text-oriented display for your business, monochrome displays are the ideal one you would like to purchase.
Grayscale displays
Portrays the different intensity of a color ranging from the intensity black to the intensity white.
RGB displays
Also called full-color displays, this type of display enables to produce a complex array of colors. If you are looking for an LED display that is capable of playing videos or slideshows to enhance your customers advertising tools - previously only available on TV - RGB displays are the ideal one for your customers.
The distance between your sign and its viewers is the number one factor in determining the type and size of LED display you will need. Longer distances require less resolution and shorter distances require higher resolutions. In addition, if you are traveling at 55 MPH on a freeway, and the sign is 600 feet away at a truck stop, the text letters must be at least 20 (twenty) inches tall to be legible. Likewise, if you are standing 60 feet away from a street level sign, the letters need only be two inches tall to be legible. The rule of thumb is that you need 1 (one) inch for every 30 (thirty) feet of viewing distance.
In addition to the discussion of viewing distance, it is important to know that at least seven rows of diodes are required to make one text character. For multiple lines of text, it requires an eighth line as a separator. This means that for each line of text there needs to be eight rows of pixels, and that those eight rows together measure the required character height.
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A With wide viewing angle LEDs, the image is visible in consistent brightness and uniform colors throughout the entire viewing range of the display. It is important to make sure that you know what LED diode density is being used.
The Louver design is an idea, and result, to reduce the wast of LED brightness while against the sunlight.
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