It’s easy to get lost in the technical terms surrounding LED signs, and one that often confuses people is pixel pitch, commonly referred to as the resolution of a digital sign.

Pixel pitch, measured in millimeters (e.g., 4mm, 6mm, 9mm, 15mm), refers to the distance from the center of one pixel to the center of the next. This spacing determines how crisp and detailed your sign’s images will appear. Each pixel is composed of three diodes (or LEDs): red, green, and blue. These combine to produce full-color visuals. In higher-resolution LED signs, these three diodes may be combined into a single lens using Surface Mount Diode (SMD) technology. This results in a cleaner, more compact design ideal for close-up viewing.

The smaller the pixel pitch, the closer the diodes, the higher the resolution, and the clearer the image and visuals for vibrant, lifelike animations.

• LED: (Light Emitting Diode): A semiconductor device that emits light when electrical current flows through it.
• Diode: The individual light-emitting components in a pixel, typically red, green, and blue, either through three LEDs or a single one, depending on the technology used, that work together to produce millions of colors.
• RGB: (Red, Green, Blue): The three primary colors used in LED displays. By varying the intensity of each, a full spectrum of colors is created for vibrant, full-motion graphics.
• SMD: (Surface Mounted Device): A compact LED packaging format where all three RGB diodes are mounted on a single chip and share one lens. SMD allows for tighter pixel pitches and superior image clarity at close viewing distances.
• DIP: (Dual In-Line Package) In this LED technology, each pixel is composed of three separate LEDs (RGB) mounted through holes on a circuit board. It looks like three small domes in contrast to SMD technology which is a flat square.

An LED display’s matrix represents how many pixels are on the display. A display with a matrix resolution of 60 (h) by 180 (w) means it has 60 pixels from top to bottom and 180 pixels from left to right. A higher matrix on your LED sign will give you #1 more lines of text, #2 more characters per line, and #3 better images and video. If you are purchasing (for example) a 4′ tall x 8′ long sign, selecting a smaller pitch will increase the matrix of the display, which means better image quality. A 20mm resolution 4′ tall x 8′ long LED sign has a pixel matrix of 60×120 pixels (60 rows x 120 columns = 7,200 pixels). On the other hand, a 15mm resolution 4′ tall x 8′ long LED sign has a pixel matrix of 80×160, which gives you a total of 12,800. That’s 77% more pixels in the same square footage = a much higher resolution sign

• 4mm pixel pitch best viewed at 4 meters or 13 feet and beyond
• 6mm pixel pitch best viewed at 6 meters or 20 feet and beyond
• 9mm pixel pitch best viewed at 9 meters or 30 feet and beyond
• 15mm pixel pitch best viewed at 15 meters or 50 feet and beyond

Tip: The higher the resolution (i.e., smaller pixel pitch), the greater the investment. Choose a pitch appropriate for your audience's average viewing distance to maximize ROI.

If your sign is to be installed along a highway or roadside, where viewers are typically 50 feet or more away, a 15mm pixel pitch is an excellent choice. It provides image quality visually comparable to a 6mm display, at a significantly lower cost, saving your budget for other business needs.