TWI391601B - Led illuminating device - Google Patents

Description

LED lighting device

The present invention relates to a lighting device, and more particularly to a lighting device using an LED as a light source.

Compared with traditional light sources, light-emitting diodes (LEDs) have higher luminous efficiency (light source temperature is lower than general bulbs), low radiation, low power consumption, long life, low voltage, fast start-up, environmental protection, no pollution, anti-seismic resistance The advantages of pressure and luminaires can be miniaturized. Lighting devices using LEDs as light sources are currently widely used in various lighting applications such as indoor lighting, outdoor lighting, portable lighting (such as flashlights), and situational lighting. However, since the LED itself is a point light source and the illuminating characteristic has a strong directionality, the illuminating angle is much smaller than that of a conventional light source (such as an incandescent lamp, an energy saving lamp, etc.). Referring to Figure 1, the conventional light source (incandescent lamp) has a light divergence angle of S1 and S1 of about 160 degrees. Referring to Figure 2, the light divergence angle of an ordinary LED bulb is S2, and S2 is about 60 degrees. Since the effective illumination range of the LED lighting device is much smaller than that of the conventional light source, the application of the conventional light source does not match the light source characteristics required by the original lighting design, so that the LED lighting device cannot directly replace the conventional light source.

Referring to FIG. 3, in order to improve the problem that the light divergence angle of the LED illumination device is insufficient, the plurality of LED light source substrates 10 can be joined into a ring-shaped light-emitting module, which can greatly improve the light divergence angle of the LED illumination device. However, the joining of the plurality of light source substrates 10 makes the electrical connection complicated, and the bonding between the light source substrates 10 causes the heat energy (indicated by arrows) generated by the LEDs 11 to be effectively discharged naturally, so that this method is mostly applied to low luminous flux (low Among the power (low-heat) lighting products, some applications are combined with high-efficiency heat sinks to form high-brightness LED lighting devices. However, in high-light flux products, it is necessary to join multiple LED light source substrates and high-efficiency heat sinks. This has led to a significant increase in costs.

In view of the above, an LED lighting device is provided which has a wide light divergence angle and a high luminous flux, and has good heat dissipation.

An LED lighting device includes: a first lighting module including a first light source substrate and a first LED light source mounted on the first light source substrate; a second lighting module including a second light source substrate and mounted thereon a second LED light source on the second light source substrate, the first LED light source and the second LED light source are disposed opposite to each other; and a module connecting mechanism connecting the first lighting module and the second lighting module; wherein The first light source substrate and the second light source substrate are disposed in parallel to each other and do not overlap each other in a direction parallel to the light source substrate.

The first light source substrate and the second light source substrate are disposed in parallel with each other and do not overlap each other in a direction parallel to the light source substrate, and heat generated by the LED light source on the light source substrate does not accumulate, and heat dissipation is good. The illumination directions of the first illumination module and the second illumination module are opposite to each other, thereby expanding the light emission angle of the illumination device.

Please refer to FIG. 4 , which discloses an LED lighting device according to a first embodiment of the present invention. The LED lighting device includes a first lighting module 20 , a second lighting module 30 , a module connecting mechanism 40 , and a power input interface 50 .

The first lighting module 20 includes a light source substrate 21 and a lamp cover 22 . The light source substrate 21 is mounted on the module connecting mechanism 40, and the lamp cover 22 is mounted on the light source substrate 21. The lamp cover 22 and the light source substrate 21 constitute a casing. The LED light source 23 is located in the housing and mounted on the light source substrate 21.

The second lighting module 30 includes a light source substrate 31 and a lamp cover 32. The light source substrate 31 is mounted on the module connection mechanism 40, and the lamp cover 32 is mounted on the light source substrate 31. The lamp cover 32 and the light source substrate 31 constitute a casing. The LED light source 33 is located in the housing and mounted on the light source substrate 31. The LED light sources 23, 33 are arranged opposite each other.

The light source substrate 21 and the light source substrate 31 are parallel to each other, are disposed not to overlap each other in a direction parallel to the light source substrate, and are spaced apart from each other in a direction perpendicular to the light source substrate. Referring to FIG. 5 together, in the present embodiment, the light source substrate 21 and the light source substrate 31 are divided by a single light source substrate. Referring to FIG. 6, the arrangement of the LED light source substrate can reduce the cost of the LED substrate and at the same time improve the poor heat dissipation caused by the arrangement of the plurality of light source substrates in the prior art.

Different lighting effects can be obtained by changing the settings of the lampshade. Referring to FIG. 7, a variety of different shades 22 of the first lighting module 20 are disclosed. The lampshade 22a is an ordinary lampshade having a flat surface. The lamp cover 22b is a lamp cover to which diffusing particles are added, which can provide a light scattering effect and soften the light. The lamp cover 22c is a lamp cover in which a light refraction mechanism is provided on the inner surface, which can change the direction in which light is emitted. The lamp cover 22d is a lamp cover provided with a roughness of the inner surface, which can provide a light diffusion effect and homogenize the light. The above arrangement is also applicable to the lamp cover 32 of the second lighting module 30.

Please refer to FIG. 8 and FIG. 9 , which are a structural diagram and a light distribution graph of a conventional LED lighting device. The LED lighting device includes a lighting module 60 corresponding to the first lighting module 20 of the present invention. The lighting module 60 includes a direct-emitting LED light source 61. Referring to Figures 10 and 11, the LED light sources 23, 33 of the present invention are also direct-type LED light sources. It can be seen from FIG. 9 and FIG. 11 that the LED lighting device of the present invention can double the light divergence angle compared with the conventional LED lighting device.

In FIGS. 12 and 13, the conventional LED lighting device employs a side-emitting LED light source 61b. In Figs. 14 and 15, the LED illumination device of the present invention also employs side-emitting LED light sources 23b and 33b. Comparing FIG. 13 and FIG. 15, it can be seen that the LED lighting device of the present invention can double the light divergence angle compared with the conventional LED lighting device.

In FIGS. 16 and 17, the conventional LED illumination device employs both a direct-type LED light source 61 and a side-emitting LED light source 61b. In Figs. 18 and 19, the LED illumination device of the present invention also employs direct-type LED light sources 23, 33 and side-emitting LED light sources 23b, 33b. 17 and 19, the LED lighting device of the present invention can double the light divergence angle as compared with the conventional LED lighting device. As can be seen from FIG. 19, the light divergence angle of the LED lighting device of the present invention is close to that of a conventional incandescent light bulb.

The LED lighting device of the present invention can be adapted to various requirements by using different LED light sources to form different lighting characteristics. Referring to Figures 20 and 21, an embodiment of the LED lighting device of the present invention is disclosed. In this embodiment, the first illumination module 20 uses a direct-type LED 23, and the second illumination module 30 uses a side-emitting LED source 33b to form an asymmetric light-diverging characteristic. Please refer to Figure 22, the illumination set by the above LED light source The device is suitable for applications where bidirectional lighting applications are required.

Different lighting effects can also be obtained by changing the settings of the lampshade. Referring to Figures 23 and 24, yet another embodiment of the LED lighting device of the present invention is disclosed. In the present embodiment, the Led illuminating device simultaneously employs the direct-type LED light sources 23, 33 and the side-emitting type LED light sources 23b, 33b, and the arrangement of the light sources is the same as that shown in FIG. Further, the globes 22b and 32b are made of a diffuser to which diffusing particles are added, and the LED illuminating device can form an illuminating characteristic of the uniform illuminating body by the light diffusing effect of the cap.

10‧‧‧Light source substrate

11‧‧‧LED

20‧‧‧First lighting module

21‧‧‧Light source substrate

22‧‧‧shade

22a‧‧‧shade

22b‧‧‧shade

22c‧‧‧shade

22d‧‧‧shade

23‧‧‧LED light source

23b‧‧‧Side-emitting LED light source

3‧‧‧Second lighting module

31‧‧‧Light source substrate

32‧‧‧shade

33‧‧‧LED light source

33b‧‧‧Side-emitting LED light source

40‧‧‧Module connection mechanism

50‧‧‧Power input interface

60‧‧‧Lighting module

61‧‧‧Direct LED light source

61b‧‧‧Side-emitting LED light source

Figure 1 is a schematic view of the light source divergence angle of a conventional light source.

2 is a schematic diagram of the light divergence angle of a conventional LED bulb.

FIG. 3 is a schematic diagram of a heat dissipation mode of the annular LED lighting module.

4 is a schematic cross-sectional structural view of an LED lighting device according to a first embodiment of the present invention.

Fig. 5 is a schematic view showing the configuration of a light source substrate of the LED lighting device of Fig. 4;

FIG. 6 is a schematic diagram of a heat dissipation mode of the LED lighting device of FIG. 4. FIG.

Figure 7 is a schematic illustration of various different shade arrangements of the LED lighting device of Figure 4.

Fig. 8 is a view showing the illumination characteristics of a conventional LED lighting device.

Fig. 9 is a light distribution graph of the LED lighting device of Fig. 8.

Fig. 10 is a view showing the illumination characteristics of the LED lighting device of Fig. 4.

Figure 11 is a light distribution graph of the LED lighting device of Figure 4.

Fig. 12 is a view showing the illumination characteristics of another conventional LED lighting device.

Fig. 13 is a light distribution graph of the LED lighting device of Fig. 12.

Fig. 14 is a view showing an illumination characteristic of an LED lighting device according to a second embodiment of the present invention.

Fig. 15 is a light distribution graph of the LED lighting device of Fig. 14.

Fig. 16 is a view showing the illumination characteristics of still another conventional LED lighting device.

Figure 17 is a light distribution graph of the LED lighting device of Figure 16;

Fig. 18 is a view showing the illumination characteristics of the LED lighting device according to the third embodiment of the present invention.

Figure 19 is a light distribution graph of the LED lighting device of Figure 18.

Fig. 20 is a view showing the illumination characteristics of the LED lighting device of the fourth embodiment of the present invention.

21 is a light distribution graph of the LED lighting device of FIG. 20.

Figure 22 is a schematic view showing the application of the LED lighting device of Figure 20.

Fig. 23 is a view showing the illumination characteristics of the LED lighting device of the fifth embodiment of the present invention.

Figure 24 is a light distribution graph of the LED lighting device of Figure 23;

20‧‧‧First lighting module

21‧‧‧Light source substrate

22‧‧‧shade

23‧‧‧LED light source

30‧‧‧Second lighting module

31‧‧‧Light source substrate

32‧‧‧shade

33‧‧‧LED light source

40‧‧‧Module connection mechanism

50‧‧‧Power input interface

Claims (6)

An LED lighting device includes: a first lighting module including a first light source substrate and a first LED light source mounted on the first light source substrate; a second lighting module including a second light source substrate and mounted thereon a second LED light source on the second light source substrate, the first LED light source and the second LED light source are disposed opposite to each other; and a module connecting mechanism connecting the first lighting module and the second lighting module; wherein The first light source substrate and the second light source substrate are parallel to each other and the projections in a direction parallel to the light source substrate are disposed not coincident with each other. The LED lighting device of claim 1, wherein the first light source substrate and the second light source substrate are divided by a whole light source substrate. The LED lighting device of claim 1, wherein the first light source substrate and the second light source substrate are spaced apart from each other in a direction of the vertical light source substrate. The LED lighting device of claim 1, further comprising a lamp cover respectively mounted on the first light source substrate and the second light source substrate. The LED lighting device of claim 4, wherein the lampshade is one of a lampshade having a flat surface, a lampshade with diffusing particles, a lampshade with a light refraction mechanism on the inner surface, or an inner surface. Set the shade of the lampshade. The LED lighting device of claim 1, wherein the first LED light source and the second LED light source are respectively one of the following LED light sources. Species: Direct LED or side-emitting LED.