LED lamp beads are widely used in lighting, LED large screen display, traffic lights, decoration, computers, electronic toys gifts, switches, telephone fans, advertising, urban brilliance projects and many other production areas. The application of LED lamp beads in the field of transportation.

Because of its extraordinary use, the traffic signal instigation light requires the brightness of the LED lamp beads to be in a strong scale, and at the same time does not cause visual stimulation or confusion to vehicles and pedestrians, so the red, yellow and green light beads are in the band. , brightness and life are required.

The latest national standard parameters and brightness angles of traffic light beads are as follows:

Traffic light red light band 620-625nm brightness 4000-6000mcd

Traffic light yellow light band 590-593nm brightness 4000-6000mcd

Traffic light green light band 503-505nm brightness 8000-10000mcd
The LED products used in the traffic field mainly include red, green and yellow signal signals, digital timing display, arrow signals, etc. When the product requires high-intensity ambient light during the day, it should be bright, and the brightness should be lowered at night to avoid glare. The light source of the LED traffic signal indicator light is composed of multiple LED lamp beads. When designing the light source, multiple cores must be considered, and there are certain requirements for the installation of the LED lamp beads. If the installation is inconsistent, it will affect the light of the light-emitting surface. The uniformity of the effect, so it is necessary to consider how to avoid the appearance of such defects in the design. If the optical design is too simple, the light distribution of the signal lamp is mainly guaranteed by the LED's own perspective, then the LED's own light distribution The requirements and installation requirements are relatively strict, otherwise this phenomenon will be very obvious.

LED traffic lights also have certain distinctions from other signal lights (such as car headlights, etc.) in the light distribution, of course, there are also requirements for light intensity distribution. And the requirements of car headlamps on the light cut-off line are even more severe. The design of car headlights only needs to arrange enough light to the corresponding place, and it is not necessary to consider where the light is emitted. It is necessary to take into account the uniformity of the luminous effect of the entire luminous surface, and it must be satisfied that when observing the luminous surface of the signal from any working area used by the signal lamp, the pattern of the signal must be clear, and the visual results must be average. Although incandescent and tungsten halogen light source signal lamps emit constant and average light, they have disadvantages such as high energy consumption, low lifespan, easy phantom signal display, and easy fading of color chips. If the dead light phenomenon of LED lamp beads can be reduced and the light decay can be reduced, the use of high-brightness, low-energy-consumption LEDs in signal lamps will definitely bring revolutionary changes to signal lamp products.