LED road lamp
A technology of LED street lamps and LED light sources, applied in the field of optical systems, can solve problems such as being unfavorable for the utilization of light energy, unable to meet the lighting requirements of rectangular areas, etc.
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Embodiment 1
[0034] see figure 1 , figure 2 In this embodiment, the LED street lamp includes LED light sources, and there are multiple LED light sources. Each LED light source is an LED chip 1. The size of the LED chip can be 350um×350um or 1mm×1mm. The LED chip is coated with phosphor 7.
[0035]Each LED chip is placed at the bottom of an aspherical primary packaging divergent lens 2 and packaged with the primary package divergent lens to form an LED module. Each LED chip corresponds to a group of optical devices, the group of optical devices includes two pairs of different side collimating reflective surfaces, a pair of end reflective slopes 8,9, wherein a pair of side collimating reflective surfaces 3,4 are used to The light is compressed in the width direction of the illuminated plane rectangle, and the other pair of side collimating reflective surfaces 5 and 6 are used to expand the light in the length direction of the illuminated plane rectangle through reflection. The direction ...
Embodiment 2
[0047] The difference in this embodiment is that the pair of end reflective surfaces are curved surfaces 11 and 12 . An array of LED light sources is placed symmetrically along the Z-axis of symmetry. Such as Figure 7 shown. Each group of optical devices is packaged with one or several LED chips as a group, and multiple groups are used in matrix splicing and combination. In order to make the light spot on the far-field flat screen a rectangle, the directions of all symmetry axes X and Y of the optical system should be consistent or parallel during splicing.
[0048] Such as Figure 8 As shown, the reflective curved surfaces 11, 12 reflect the large-angle (Ψ>ΨM) light emitted by the lens 2 to the opposite direction of the X-axis, and the design of the exit angle of the marginal rays 41, 51 determines the maximum exit angle Ψ0 of the system in the X direction , usually Ψ0>ΨM. Thereby guiding all outgoing light such as: light 42, 43, and emitted light 52, 53, all will be sh...
Embodiment 3
[0050] see Figure 9 , the difference in this embodiment is that the LED light source is a combination of multiple LED chips, and the combined LED chips as a whole correspond to two pairs of different side collimating reflective surfaces and a pair of end reflective surfaces. The optical device of this LED street lamp is only one set, but the corresponding LED light source is a combination of multiple LED chips.
[0051] In a specific implementation, the primary lens 2 attached to the light source may be a spherical mirror or an aspheric lens. The light source can also use no lens or planar packaging, which only changes the light distribution emitted by the light source, and can be optimized according to these initial conditions when designing the reflective surface.
[0052] The street light system designed by the invention has higher light output efficiency than the general refracting lens optical system, the system is simple, easy to mass-produce, can be applied to high-po...
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