Method, device and lamp for adjusting light distribution curve of light emitting diode (LED)

Abstract

The invention provides a method for smoothly adjusting a light distribution curve (half light intensity angle) of the LED as well as a device and a lamp corresponding to the method. When the light distribution curve is adjusted, the current of a first LED luminous module is reduced, simultaneously the current of a second LED luminous module is increased, and the first LED luminous module and the second LED luminous module have different half light intensity angles. More than two LED luminous modules with different half light intensity angles are adopted, the light intensity distribution of the entire LED lamp is the weighted average of the light intensity of each LED luminous module, when the light distribution curve needs to be adjusted, the current of one LED luminous module is reduced, and simultaneously the current of the other LED luminous module with different half light intensity angle is increased, so that in the variation process, a waxing and waning effect is achieved, and the variation of the light distribution curve of the lamp is realized through the combination of the light intensity variation of more than two LED luminous modules with different half light intensity angles.

Description

technical field [0001] The invention relates to the field of LEDs, in particular to a method, a device and a lamp for adjusting an LED light distribution curve. Background technique [0002] In recent years, LED (Light Emitting Diode) has been favored by the industry due to its high luminous efficiency and long service life, so related technologies have developed extremely rapidly. A large number of LED products and technologies are widely used in lighting fields, such as street lighting, home lighting, special lighting and so on. In LED lighting technology, the LED light distribution curve represents the distribution of the light intensity of the LED lighting device as a function of the angular position, and the "half light intensity angle" is an important parameter to characterize the LED light distribution curve, such as figure 1 Shown: [0003] figure 1 The middle abscissa is the light intensity. Use concentric arcs to draw the isoluminous intensity line similar to th...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. Only by changing the deflection angle in the light pattern, it is impossible to control the half light intensity angle in the light distribution curve of the lamp and cannot make the half light intensity angle excessively continuously change.

2. The mechanical structure is easy to cause the lamp to be too large

3. Not by current control but by mechanical control

In this case, since the lens and light source are already selected models, if the light source is at a certain distance from the lens, the lamp can achieve a relatively uniform spot, but the distance between them continues to decrease or increase, which will affect the uniformity of the spot. It is possible to form a bright center or a black hole in the middle, resulting in unsatisfactory lighting effects

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