The LED products used in the field of transportation mainly include red, green and yellow signal indications, digital timing displays, arrow indications, etc. The product requires high intensity ambient light during the day to be bright, and the brightness at night to be reduced to avoid dazzling. The light source of the LED traffic signal command lamp is composed of a plurality of leds, so the light source design should consider multiple focal points, and the installation of the LED also has certain requirements, if the installation is inconsistent will affect the uniformity of the luminous surface, so in the design we must consider how to avoid the appearance of this defect, if the optical design is too simple, The light distribution of the signal is mainly ensured by the Angle of view of the LED itself, so the requirements for the light distribution of the LED itself and the installation requirements are relatively strict, otherwise this phenomenon will be very obvious.
LED traffic signals in the light distribution and other signals (such as car headlights, etc.) also have a certain difference, although the same light intensity distribution requirements. The requirements of car headlights on the light cutoff line are more stringent. The design of car headlights as long as enough light is configured to the corresponding place, without considering where the light is emitted, the designer can be divided into small pieces to design the light distribution area of the lens, but the traffic signal also needs to take into account the uniformity of the light effect of the entire luminous surface, it must meet the need to observe the signal luminous surface from any working area used by the signal. The pattern of the signal needs to be clear, and the visual effect needs to be uniform. Although the incandescent lamp and halogen light source signal are stable and uniform, there are defects such as high energy consumption, low life, easy to produce phantom signal display, and color fading. If you can reduce the LED dead lamp phenomenon, reduce the light decay so high brightness, low energy consumption LED in the signal machine application, will bring revolutionary changes to the signal product. The LED products used in the field of transportation mainly include red, green and yellow signal indications, digital timing displays, arrow indications, etc. The product requires high intensity ambient light during the day to be bright, and the brightness at night to be reduced to avoid dazzling. The light source of the LED traffic signal command lamp is composed of a plurality of leds, so the light source design should consider multiple focal points, and the installation of the LED also has certain requirements, if the installation is inconsistent will affect the uniformity of the luminous surface, so in the design we must consider how to avoid the appearance of this defect, if the optical design is too simple, The light distribution of the signal is mainly ensured by the Angle of view of the LED itself, so the requirements for the light distribution of the LED itself and the installation requirements are relatively strict, otherwise this phenomenon will be very obvious.