Patent Application
20120032577
1. Field of the Invention
The present invention relates to a lighting device, and more particularly to an LED lighting device with a wide angle illumination.
2. Description of Related Art
Since power consumption of lighting emitting diode (LED) is relatively low, more and more LED-based lighting device are available in the market and substitute conventional illuminating elements. With reference to
The light generated by the LEDs 51 is directional. If the LEDs 51 are mounted on the same plane, the light from the LEDs 51 will irradiate toward the same direction. Therefore, the conventional LED lamp is unable to provide a wide angle illumination area.
To overcome the shortcomings, the present invention provides an LED lighting device to mitigate or obviate the aforementioned problems.
The main objective of the invention is to provide an LED lighting device with a larger area for mounting multiple LEDs that emit light toward different directions to achieve a wide angle illumination.
An LED lighting device in accordance with the present invention comprises a cap, a circuit board assembly and a bulb envelope. The circuit board assembly is electrically mounted on the cap and has multiple circuit boards intersecting to each other to form a light frame with a crisscross section, and has multiple LEDs mounted on the circuit boards. The circuit board assembly may further have a top circuit board mounted on one end of the light frame. The top circuit board also has multiple LEDs mounted thereon. Sine the circuit boards intersect to each other, the light frame has a large surface area for mounting a lot number of LEDs. Therefore, the LED lighting device providers a wide angle illumination area with enhanced lighting intensity.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The cap 10 has an inner space to hold a base 11. The cap 10 is made of conductive material and may have a screwed outer surface to electrically connect to a socket. The base 11 is an insulative base, for example a glass base.
With further reference to
The bulb envelope 30 is securely mounted around the cap 30 and not limited to a particular shape. For example, the shape of the bulb envelope 30 may be a candle fire as shown in
The circuit board assembly 20 can further comprise a top circuit board 26 mounted on one end of the light frame opposite to the base 11. The top circuit board 26 is electrically connected to the circuit boards 21, 22 and has multiple LEDs 23a mounted thereon to increase illuminating area and enhance the lighting effect. The top circuit board 26 can be, but not limited to, crisscross, circular, rectangular as shown in
With further reference to
From the above description, it is noted that the present invention has the following advantages.
1. Large surface for mounting LEDs
The circuit boards 21, 22 of the circuit board assembly 20 are arranged to form a three-dimensional light frame with a surface large enough for mounting a lot number of LEDs to enhance intensity of illuminating light and provides a wide angle illumination.
2. Excellent heat dissipation effect
Because the group of LEDs aligned in one circuit board is separated from another group mounted in another circuit board by a space, the generated heat can be dissipated efficiently.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
