Patent Application
20110181165
1. Field of the Invention
The present invention relates to a light emitting diode (LED) lamp, especially to a lamp using LEDs as a light source.
2. Description of the Prior Art(s)
With rising energy costs environmental consciousness, conventional incandescent bulbs having low energy conversion efficiency will be eventually gradually replaced by lower-energy variants, such as fluorescent, halogen and light emitting diode (LED) lamps. Of the foregoing, LEDs have longer operating lives so gain greater energy efficiency when production and transportation energy is included in such measures.
With reference to
However, the conventional LED lamp with the converter module (25) has the following disadvantages.
When the converter module (25) converts the AC to the DC, power loss occurs and unnecessary heat is generated. Consequently, energy is wasted and temperature of the conventional LED lamp is hard to be lowered causing failure of the conventional LED lamp.
The converter module (25) and assembling the converter module (25) causes high manufacturing cost of the conventional LED lamp. Moreover, the converter module (25) has an operating life shorter than the DC LED module (23). Therefore, when the converter module (25) breaks, although the DC LED module (23) still works, the conventional LED lamp cannot be used anymore.
Since the temperature of the conventional LED lamp is high, the DC fan (24) for the conventional LED lamp needs to have rotational speeds higher than 4000 rotation per minute (RPM) and consequently generates noise.
To overcome the shortcomings, the present invention provides an LED lamp to mitigate or obviate the aforementioned problems.
The main objective of the present invention is to provide a light emitting diode (LED) lamp. The LED lamp has a seat with a base, a cover mounted on the seat, and an AC fan, a heat sink and an AC LED light source mounted in the seat. The AC fan and the AC LED light source are electrically connected to the base of the seat.
An AC directly drives the AC fan and the AC LED light source and no converter module is needed. Therefore, the LED lamp is quiet, energy saving and has good heat dissipation and low manufacturing costs for a prolonged operating life.
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
With further reference to
The cover (12) is pervious to light, is mounted on the top of the seat (11) and has a lens (121) and multiple front vents (122). The lens (121) gathers light and may be transparent. The front vents (122) are formed through the cover (12).
The AC fan (13) is mounted in the mounting recess (111) of the seat (11) and has two fan wires (131). The fan wires (131) are respectively connected electrically to the AC contacts (1121, 1122) of the base (12).
The heat sink (14) is mounted in the mounting recess (111) of the seat (11) and between the cover (12) and the AC fan (13) and has multiple fins (141) and a storing recess (142). The storing recess (142) is formed in a top of the heat sink (14) and corresponds to the cover (12).
The fasteners (16) are mounted through the heat sink (14) and the AC fan (13) and are fastened to the seat (11) to securely hold the heat sink (14) and the AC fan (13) on the seat (11).
The AC LED light source (15, 15A) is mounted in the mounting recess (111) of the seat (11), is securely mounted in the storing recess (142) of the heat sink (14), corresponds to the cover (12) and has multiple LED wires (151). The LED wires (151) are connected electrically to the AC contacts (1121, 1122) of the base (12).
The AC LED light source (15) may be an AC LED module and has at least one AC LED chip and a heat dissipating base. The at least one AC LED chip is packaged on the heat dissipating base. The heat dissipating base is attached to the heat sink (14).
With further reference to
The LED lamp as described has the following advantages. Since an AC provided by a domestic power supply directly drives the AC LED light source (15, 15A) and the AC fan (13), no energy waste occurs and no unnecessary heat generates while rectifying current. Besides, the AC fan (13) dissipates heat of the AC LED light source (15, 15A) and the heat sink (14) out of the seat (11) through the rear and front vents (113, 122) of the seat (11) and the cover (12). Therefore, the LED lamp without a converter module has low manufacturing costs and a prolonged operating life. Moreover, as no more heat generated from the converter module, the AC fan (13) for the LED lamp is able to have lower rotational speeds with lower noise.
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 features of the invention, the disclosure is illustrative only. Changes may be made in the details, 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.
