2 Data block modules are LED's mounted on rectangular circuit boards and epoxied into block modules that contain a specific number of rows and columns of pixels

3 To simplify the assembly of larger signs and to permit more flexibility in the design and construction of signs, we produce subassemblies that contain a specific number of rows and columns of pixels

4 Display Array or Matrix:The display area of a programmable sign is composed of rows and columns of "pixels".  The term pixel is short for "Picture Element".  The characters and graphics of a message are formed by turning on or activating specific patterns of pixels within the display array.

5 Programming sets the characteristics of the characters used in the message: font, size, color, and position; as well as any special effects and video play, etc

The items you should consider when select the product and a company who you want to work with are as follows:

• Perfect viewing distance for your objected clients
• The size of the sign and the size of the characters are defined by the applications usage.  A rule of thumb for determining how large characters must be to be easily read is to allow 50 feet of distance per readable inch or to allow 600 feet of distance per foot of readable text, the follows is the perfect size of characters for Text and graphics according to the distance and speed.

• Full Color display distance

Virtual Pixel is a technology which employs interlacing of three parts of an image at a very high speed into one image with a resolution three times higher than the actual number of physical pixels in a display.
This technique requires very good design of driving electronics, allowing for high-speed image presentation. The video processing equipment also needs to be top-class.

2.What you want to display?

A.Only Data? So you just need the segment data display

B.Only alphanumeric Text? So you need the single color or Bi-color display

C.Data plug Text? So you need the segment data and panel display

D.Text and Graphics? So you need the single color or Bi-color display or full color displays

E. Video or living media? So you need the full color displays (Real Pixel or Visual Pixel)

• The manufacture you need
• Does he have the complete solutions?
• Can he understand what you want and what you need and provide reasonable proposal for you, special English communication and trianing?
• How long has he been in these fields?
• What kind of LED lamp he will give you?
• Any protection?
• Warranty?
• English Technician training and other training?
• Spare part?

As long as 8 years experience in the LED displays fields, Megalight is sure that you can get what you want and help you to match your requirement.

For some more detail principle of LED displays, please refer to the follows info which make help you to understand some more.

Light Emitting Diodes (LED's)
An LED is a tiny chip of silicon made to produce light in a variety of colors including red, green, yellow, and blue.

Display Array or Matrix
The display area of a programmable sign is composed of rows and columns of "pixels".  The term pixel is short for "Picture Element".  The characters and graphics of a message are formed by turning on or activating specific patterns of pixels within the display array.

LED and Display Colors
Bi-color LED's are made using red and green LED's in the same package. Most indoor programmable LED displays today use either all red LED's or they use red and green LED's.  To a lesser extent all amber is sometime selected. It is possible to create 256 or more shades of color from red to green using only red and green bi-color LED's.  Blue LED's are the most expensive and have the highest brightness.  Adding blue LED's to the red and green can give you over 1.7 million shades of color.

Number of Pixels
LED (light emitting diodes) displays are described by the number of rows and by the number of columns. 

Types of Pixels
The pixel can be one or more LED's.  A discrete LED is one individual diode.  LED blocks and clusters are multiple LED's installed as a single unit.

Pixel Light Sources
LED's are significantly less expensive than incandescent lamps.  LED's are also less expensive than monitors over a life of 10 years. ?LED's have an expected life of more than 100,000 hours or from 11 to more than 20 years.  The longer life dramatically lowers maintenance expense compared to monitors or lamps. ?LED's need very little power and generate less heat than other light sources.  Less power and heat mean less operating and maintenance costs. ?LED's are small and lightweight.  This lowers the cost of the enclosure and installation.

Pixel Diameter
The size of a pixel is stated by the diameter of the pixel.  A pixel can be as small as a single .1" diameter LED.

Center to Center Spacing
The distance from the center of one pixel to the center of the next adjacent pixel is called "Center to Center Spacing" or "Pitch".

Brightness
The output intensity or brightness of an LED is measured in millicandela. The most common technique used in indoor displays to get the greatest range of brightness is called "multiplexing".  The LED's are strobed rapidly, faster than the eye can detect, one at a time.  This method limits the brightness of each pixel since the pixel is only turned on for a sequence of brief instances. When an LED is latched on, it is lighted continuously until it is turned off again.  This produces brighter pixels.  Data block modules can only be multiplexed; discrete clusters are usually latched.

Resolution or Density
Pixel diameter and center to center spacing define the resolution or density of the character being displayed.  The closer the pixels are to each other, the higher the resolution or density of the character.  Low resolution characters are designed for distance viewing.

Viewing Distance and Speed
The size of the sign and the size of the characters are defined by the applications usage.  A rule of thumb for determining how large characters must be to be easily read is to allow 50 feet of distance per readable inch or to allow 600 feet of distance per foot of readable text.  

Programming
Programming sets the characteristics of the characters used in the message: font, size, color, and position; as well as any special effects.

Special Effects
?Scroll Up or Down. ?Wipe Up, Down, Right, Left, In and Out. ?Twinkle sparkle, Glitter, Starburst and Explode. ?Roll, March or Job. ?Snow, Spray On and Slide Across. ?Switch and Interlock. ?Paint On and Scan On. ?Split Color, Rainbow and Reverse Video. ?Flash and Hold. ?Start and Stop Time. ?Date, Time of Day, Temperature and Battery Backup. ?Animation, Graphics and Dot Programming.