LED device

#With reference to FIG. 1, similar light-emitting diode (LED) device are being employed in more and more fields. As required by one application, the LED device provides intense and non-divergent light. A known LED device 1 emitting small-light-emitting angle is provided, which meets conditions below: Assume that the optical-axis light L11 moving along the optical axis direction D11 of the known LED device 1 has maximum light intensity, and take 100% light intensity of the optical-axis light L11 as the basis. When light intensity of the deviating light L12 that deviates from the optical axis direction D11 is reduced to 50%, the light-emitting angle A11 between the light direction D12 of each deviating light L12 and the optical axis direction D11 must be less than or equal to 25 degrees (θ1/2≤±25).

#With reference to FIG. 2, the known LED device 1 comprises a base 11, a LED chip 12 that generates light on the base 11, a reflective cavity body 13 on the base 11 that surrounds the LED chip 12 and defines a reflective cavity 131 accommodating the LED chip 12, and a lens 14 in the reflective cavity body 13 that seals the reflective cavity 131 and is separated from the LED chip 12. The reflective cavity body 13 has a reflective surface 132 that defines a near-bowl-shaped reflective cavity 131. The lens 14 has a first surface 141 that orients to the LED chip 12 and appears spherical bend, and a second surface 142 opposite to the first surface 141, the section of which appears serrated shape.

#This known LED device 1 provides small light-emitting angle light mainly by reflecting the light emitted by the LED chip 12 through the reflective surface 132 and then refracted by the lens 14. However, in addition to high cost of the reflective cavity body 13, the usage of the reflective cavity body 13 also improves package difficulty of the known LED device 1 and increases production cost. To further narrow the light-emitting angle All as required during usage, an existing practice is to increase height H0 of the reflective cavity body 13, which may result in overlarge size of the LED device 1 and limits applications. In addition, this known LED device 1 generates intense stray light that influences other optical components and causes optical interference for other optical components.

#Other features and advantages of the present invention will be illustrated in embodiments below with reference to figures:

#FIG. 1 is a schematic diagram, showing how a light-emitting angle is defined in a known LED device.

#FIG. 2 is an incomplete section view, showing the known LED device.

#In the drawings: 2 Base 20 Accommodating space 21 Base 22 Encircling base portion 221 Encircling wall portion 222 Straight wall portion 224 Top surface 225 Inner surface 226 Outer surface 25 Encircling dam 3 LED chip 31 Upper top surface 4 Gold wire 5 Packaging adhesive 51 Upper surface 6 Lens 61 First surface 611 First subsurface 612 Second subsurface 613 Third subsurface 614 Top ring edge 615 Fourth subsurface 616 Fifth subsurface 617 Stretch-out surface portion 618 Radial-shrinkage surface portion 62 Second surface 621 Encircling surface segment 622 Circular surface segment 623 Straight surface portion 624 Inclined surface portion A1 Optical axis A21 Obtuse angle A22 Strong light angle A23 Semi light angle D1 Optical axis direction H1 Height L1 Chip size L2 Up-and-down spacing L3 Maximum surface spacing L4 Spacing distance L5 Shortest straight-direction spacing L6 Horizontal spacing L7 Small-angle light L8 Large-angle light W1 Minimum ring width W2 Maximum ring width W3 Outer ring width W4 Maximum diameter width W5 Face width.

#Similar components shall bear the same numbering throughout the description below.

#With reference to FIGS. 3 to 6, an embodiment of the LED device according to the present invention comprises a base 2, a LED chip 3 disposed on the base 2, a gold wire 4 that connects the LED chip 3 and the circuit which is not shown, a packaging adhesive 5 wrapping the LED chip 3 and the gold wire 4, and a lens covering the base 2.