TWI398605B - Led lamp - Google Patents

Description

Light-emitting diode lamp

The invention relates to a lighting device, in particular to a light-emitting diode lamp capable of reducing glare.

Compared with traditional light sources, light-emitting diodes have the advantages of small size, long life, low driving voltage, fast start-up, environmental protection, shock resistance and compression resistance, and are now widely used in daily indoor lighting. However, due to the small light-emitting point and beam angle of the light-emitting diode, the light intensity of the light-emitting diode is generally concentrated, which easily causes glare to the observer, causing adverse reactions such as visual fatigue and headache of the observer.

In view of the above, the present invention provides a light-emitting diode lamp with high uniformity of light emission and reduced glare.

A light-emitting diode lamp includes a base and a light cover and a light source substrate fixed on the base, the light-emitting substrate is mounted with a light-emitting diode, and further includes a light distribution plate disposed between the light cover and the light source substrate, The light distribution plate is respectively opposite to the lamp cover and the light source substrate, and the light distribution plate is formed with a protrusion. Both ends of the base include an inclined reflection portion, and the reflection portion is formed with a reflection layer for receiving the light emitting diode. The light incident on the light distribution plate at a predetermined incident angle is totally reflected to the reflective layer, and the reflective layer reflects the light to the lamp cover.

The above-mentioned light-emitting diode lamp changes the light emission direction through the light distribution plate, so that the illumination is more uniform, thereby reducing glare.

100‧‧‧Lighting diode lamps

10‧‧‧ Pedestal

20‧‧‧shade

30‧‧‧Power connector

40‧‧‧Light source substrate

50‧‧‧Lighting board

42‧‧‧Lighting diode

12‧‧‧ Heat sink fins

14‧‧‧ containment chamber

16‧‧‧Reflection Department

15‧‧‧reflective layer

18‧‧‧ card slot

22‧‧‧Snaps

52‧‧‧ bumps

1 is a schematic view of a light-emitting diode lamp according to an embodiment of the present invention.

2 is a schematic cross-sectional view of the light emitting diode lamp of FIG. 1.

FIG. 3 is a schematic diagram of an optical path in which the light emitted from the light-emitting diode lamp of FIG. 2 is totally reflected by the reflective layer.

FIG. 4 is a schematic diagram of an optical path in which the light emitted from the light-emitting diode lamp of FIG. 2 is diffusely reflected by the reflective layer.

Referring to FIG. 1 and FIG. 2 simultaneously, the LED device 100 has a substantially elongated tubular structure, and includes a base 10, a lamp cover 20, a power connector 30, a light source substrate 40, and a light distribution plate 50. The lamp cover 20 and the light source substrate 40 are fixed to the base 10, and the light distribution plate 50 is placed between the lamp cover 20 and the light source substrate 40. The power connector 30 is disposed at both ends of the light emitting diode lamp 100, and the power connector 30 is electrically connected to a power source (not shown). The light source substrate 40 is electrically connected to the power connector 30, and a light-emitting diode 42 is mounted thereon. The light distribution plate 50 is for changing the direction of light emitted from the light-emitting diode 42.

The susceptor 10 is made of an aluminum alloy substrate with good heat dissipation, and can dissipate the heat generated when the illuminating diode lamp 100 operates. The bottom of the base 10 is provided with a plurality of heat dissipation fins 12 spaced apart from each other, and the heat dissipation fins 12 are used to increase the surface area of the base 10 to accelerate air circulation and heat dissipation efficiency. The base 10 is formed with a receiving cavity 14. The light source substrate 40 is housed in the housing cavity 14. Both ends of the susceptor 10 include a slanted reflecting portion 16, and the surface of the reflecting portion 16 forms a reflecting layer 15 for totally or diffusely reflecting light projected onto the reflecting portion 16. The edge of the reflecting portion 16 is formed with a card slot 18, and the edge of the lamp cover 20 extends toward the latching portion 22, and the latching portion 22 is engaged in the card slot 18 to fix the lamp cover 20 to the base 10.

The light source substrate 40 and the susceptor 10 are adhered by a high thermal conductivity thermal conductive tape, and the thermal conductive tape can better transfer the heat generated by the light source substrate 40 to the susceptor 10, and then exchange heat with the air through the heat dissipation fins 12. .

In the present embodiment, the light distribution plate 50 is integrally formed with the globe 20, and both sides of the light distribution plate 50 are opposed to the light source substrate 40 and the globe 20, respectively. The light distribution plate 50 is formed opposite to the light emitting diode 42 with an isosceles triangular protrusion 52 having a cross section for totally reflecting the forward and near forward light emitted from the light emitting diode 42 to the reflective layer 15. . The cross section of the projection 52 may also be other shapes such as a curved surface.

As with reference to FIG. 3 and FIG. 4 at the same time, the light emitted from the light-emitting diode 42 in the forward and near-emissions is projected onto the protrusion 52 and is totally reflected by the protrusion 52 onto the reflective layer 15, which is totally reflected or diffused by the reflective layer 15. The reflection is projected onto the light distribution plate 50, and after two reflections, the incident angle of the light incident on the light distribution plate 50 is greatly increased, and the area of the light that is refracted by the light distribution plate 50 and projected onto the lamp cover 20 is correspondingly increased, thus increasing The light-emitting diode 42 has a light-emitting angle that makes the light distribution density more uniform and the light effect is softer, thereby reducing glare.

10‧‧‧ Pedestal

20‧‧‧shade

40‧‧‧Light source substrate

50‧‧‧Lighting board

42‧‧‧Lighting diode

12‧‧‧ Heat sink fins

14‧‧‧ containment chamber

16‧‧‧Reflection Department

15‧‧‧reflective layer

18‧‧‧ card slot

22‧‧‧Snaps

52‧‧‧ bumps

Claims (7)

A light-emitting diode lamp comprises a base and a lamp cover and a light source substrate fixed on the base, wherein the light source substrate is mounted with a light-emitting diode, and the improvement thereof comprises: a device disposed between the lamp cover and the light source substrate a light plate, the two sides of the light distribution plate are respectively opposite to the lamp cover and the light source substrate, and the light distribution plate is formed with a protrusion facing the light emitting diode, the two ends of the base include an inclined reflection portion, and the reflection portion is formed with a reflection layer. The bumps are used to totally reflect light from the forward and near forward directions of the light emitting diode to the reflective layer, the reflective layer reflecting the light to the shade. The light-emitting diode lamp of claim 1, wherein the light distribution plate and the lamp cover are integrally formed. The illuminating diode lamp of claim 1, wherein the protrusion has an isosceles triangle in cross section. The illuminating diode lamp of claim 1, wherein the protrusion has a curved cross section. The light-emitting diode lamp of claim 1, wherein the base is formed with a card slot, and the lamp cover protrudes toward the buckle portion, the buckle portion is locked in the card slot, and the lamp cover is fixed. On the pedestal. The illuminating diode lamp of claim 1, wherein the pedestal further comprises a plurality of spaced fins. The light-emitting diode lamp of claim 1, wherein the base is formed with a receiving cavity, and the light source substrate is received in the receiving cavity.