LED Display terminology
LED is abbreviated by Light Emitting Diode. Best described as a lighting bulb which is smaller than the size of dime. On the other word, the diodes have a life expectancy of 100,000 hours or 11.5 years of continuous working, therefore, it is more economical than the standard incandescent lighting bulb.
PIXEL is short for picture element. Pixels are points of light that illuminate to form letters, words, graphics, animation and video images. A pixel can be made up of a single LED, multiple LEDs of the same color or multiple LEDs of different colors. A pixel is the smallest element of the electronic display system that can be individually controlled. It can be turned off or on at various brightness levels.
PIXEL PITCH The distance from the center of a pixel to the center of the next pixel. It influences the resolution of a LED display that shows images. Longer distances require less resolution, and shorter distances require higher.
RESOLUTION is defined as the number of pixels contained in the physical area of an electronic display. The greater the number of pixels per square foot, the greater the amount of detail displayed.
VIEWING ANGLE(Horizontal/Vertical) Optimum viewing angle is determined by the horizontal and vertical points at which the measured light intensity is 50 percent of that measured directly in front of the display.
Viewing area may exceed the optimum viewing angle depending on site-specific circumstances and ambient light conditions.
VIEWING DISTANCE The distance between your sign and its viewers is the number one factor in determining the type of LED display you will need. Longer distances require less resolution and shorter distances require higher resolutions.
BRIGHTNESS is one of the most important characteristics of any display. The main unit of brightness for light sources is candela (cd). The brightness of individual LEDs is usually expressed in millicandelas (mcd - a thousandth of a candela). If individual LED brightness in one square meter is added together, we get the value of area brightness. It is expressed in Nits (1 Nit = 1 cd/m2 - candelas per square meter).
GRAY LEVEL is the number of different brightness levels that each of LEDs can reproduce. This is usually 256 in a standard full color LED display, thereby allowing the display to produce 16.7 million colors (256 x 256 x 256 = 16,777,216). Regarding to one color say Red, the levels from most black to most bright which is called Grey Levels. The greater levels, the clearer of displaying.
Select a right LED Display
The following factors should seriously be taken into consideration when you plan to purchase a YAHAM LED Display.
- Pitch
- Text, Graphics, animation and/or Video
- Communication Method(for example, RS232, WIFI, LAN/WAN, 802.11 wireless)
- Installation manner
- Where will the viewing audience be? i.e. the viewing distance
YAHAM’s employee is highly expertised to be always ready for helping you to make a right decision in purchasing the right YAHAM LED Display for your application. Call us right now or go to our Contact page to request more information.