Analyze LED street light design requirements specification
In the market, common LED street light power supply with constant current power supply, this is determined by the LED lighting material characteristics, these materials are greatly influenced by the environment, more than rated current job for a long time, can greatly shorten the service life of the lamp bead, and constant current power supply can play the role of protection current is stable.
LED street light design has the following requirements:
1, the biggest characteristic of LED lighting is has the function of directional transmission light because almost all equipped with power type LED reflector, and the efficiency of the reflector are significantly higher than the efficiency of the reflectors of lamps and lanterns.
In addition, the efficiency of the self - reflector has been included in the light - effect detection of the led. LED street light as far as possible use of LED light beam transmission characteristics, the light directly into the road that have been illuminated, reuse reflector lamps and lanterns of auxiliary light distribution, to achieve the comprehensive light distribution of lamps and lanterns is very reasonable way.
It should be said that LED street light should truly meet the standard requirements of CJJ45-2006，CIE31 and CIE115 standard and the uniformity of the illumination requirement. The luminaire should contain three light matching functions to achieve a better realization.
The LED street light with reflector and reasonable beam output angle has a good photocoordination function. In the lamps and lanterns, the installation position and the direction of the emitting light can be realized in the direction of the installation position and emission light of the various leds according to the height and pavement width of the road lamps.
2, the power system of LED street light is different from the traditional light source, LED by realizing the constant current drive power, is to guarantee the normal work of a large foundation, the scheme of simple switching power supply often brings damage to LED devices.
How to tighten tightly together a group of LED safety, It is also an index to investigate the LED street light. LED to the requirement of the drive circuit is can ensure constant current output characteristics, because the LED forward junction voltage relative changes at work area is very small, so to ensure the LED drive current constant is basic guarantee for the LED constant power output.
The status quo of china the power supply voltage is not stable, driver circuit of LED street light with constant current output characteristics is very necessary, can ensure constant and prevent the super power of the LED street light output.
LED street light design has the following requirements:
1, the biggest characteristic of LED lighting is has the function of directional transmission light because almost all equipped with power type LED reflector, and the efficiency of the reflector are significantly higher than the efficiency of the reflectors of lamps and lanterns.
In addition, the efficiency of the self - reflector has been included in the light - effect detection of the led. LED street light as far as possible use of LED light beam transmission characteristics, the light directly into the road that have been illuminated, reuse reflector lamps and lanterns of auxiliary light distribution, to achieve the comprehensive light distribution of lamps and lanterns is very reasonable way.
It should be said that LED street light should truly meet the standard requirements of CJJ45-2006，CIE31 and CIE115 standard and the uniformity of the illumination requirement. The luminaire should contain three light matching functions to achieve a better realization.
The LED street light with reflector and reasonable beam output angle has a good photocoordination function. In the lamps and lanterns, the installation position and the direction of the emitting light can be realized in the direction of the installation position and emission light of the various leds according to the height and pavement width of the road lamps.
2, the power system of LED street light is different from the traditional light source, LED by realizing the constant current drive power, is to guarantee the normal work of a large foundation, the scheme of simple switching power supply often brings damage to LED devices.
How to tighten tightly together a group of LED safety, It is also an index to investigate the LED street light. LED to the requirement of the drive circuit is can ensure constant current output characteristics, because the LED forward junction voltage relative changes at work area is very small, so to ensure the LED drive current constant is basic guarantee for the LED constant power output.
The status quo of china the power supply voltage is not stable, driver circuit of LED street light with constant current output characteristics is very necessary, can ensure constant and prevent the super power of the LED street light output.
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