TWI518283B - Led lamp - Google Patents

Description

Light-emitting diode bulb

The present invention relates to a light bulb, and more particularly to a light emitting diode bulb.

Light-emitting diodes are currently being promoted as a light source for illumination because of their low energy consumption and high efficiency. Although the light-emitting diode bulb has the above advantages, the problem of heat dissipation must be solved. If the heat cannot be effectively dissipated, the high temperature may cause problems such as reduced luminous efficiency, reduced lifetime, and wavelength shift of the light-emitting diode, and even burning of the LED chip.

Conventional technology has a heat sink fin mounted on the base of the light-emitting diode bulb to dissipate the heat generated by the light-emitting diode bulb during operation. Although the heat dissipating fins described above can dissipate heat, their bulk is large and the appearance is not satisfactory. Furthermore, the provision of heat sink fins increases the manufacturing cost and also increases the overall weight of the bulb.

In view of this, there is a need to propose a solution to solve the above problems.

The invention provides a light-emitting diode bulb with better heat dissipation effect.

In order to achieve the above object, the light-emitting diode bulb package of the present invention The invention comprises: a lamp cap having a first electrode and a second electrode, the lamp cap being a hollow structure defining a chamber; a capacitor disposed in the chamber; and a light emitting diode light source disposed on the capacitor And a thermally conductive insulating material filled in the chamber and in mechanical contact with the second electrode of the base and the capacitor.

The above and other objects, features, and advantages of the present invention will become more apparent from the accompanying drawings. In the description of the present invention, the same components are denoted by the same reference numerals and will be described.

Referring to Fig. 1, a light-emitting diode bulb 100 of the present invention has a lamp housing 190 and a base 110. The lamp housing 190 has a hollow structure and is disposed on the base 110. The lamp cap 110 is a hollow structure, and has a chamber 112 defined therein, and a first electrode 114 and a second electrode 116 are disposed on the outside to be electrically connected to an AC power source. It should be understood by those of ordinary skill in the art that the second electrode 116 has a spiral-shaped metal shell for screwing into a power supply seat, and the interior thereof is a chamber 112. A resistor 120 and a capacitor 130 are disposed in the chamber 112, wherein one end of the resistor 120 is electrically connected to the second electrode 116. The capacitor 130 is preferably an aluminum solid capacitor having a first pin 134 and a second pin 132, wherein the second pin The 132 is electrically connected to the other end of the resistor 120 by the wire 122, and the first pin 134 is electrically connected to the first electrode 114 of the lamp cap 110 by a wire. A light emitting diode (LED) light source 140 is disposed on the top of the capacitor 130, and has a light emitting diode chip 144 fixed on a bracket 142 and covered with a sealant 146. The LED light source 140 further includes two electrodes 147 and 148, wherein the electrode 147 is electrically connected to the second pin 132 of the capacitor 130 by the wire 172, and the other electrode 148 is connected to the capacitor 130 by the wire 174 and the capacitor 130. The first pin 134 is electrically connected.

In this embodiment, the LED source 140 can be an AC LED source, and the LED array 144 is an AC LED chip. It should be understood by those skilled in the art that the so-called alternating current illuminating diode chip has two light emitting diodes arranged in opposite directions and connected in parallel between the two electrodes 147, 148, each having at least one of the directions. A light-emitting diode, the two light-emitting diodes disposed in opposite directions are respectively illuminated in positive and negative half cycles of the alternating current power source. The bracket 142 typically contains a metal sheet that assists in the dissipation of the alternating current LED chip 142. Therefore, when the bracket 142 is fixed on the top of the capacitor 130 by using the conductive or non-conductive heat conductive adhesive 150, the heat generated by the LED wafer 144 during operation can be conducted to the capacitor 130 to pass through the capacitor 130. Help with heat dissipation. In order to help dissipate heat, the present invention is filled with a thermally conductive insulating material 180 in the chamber 112 of the base 110, which mechanically contacts the resistor. 120. The capacitor 130 and the second electrode 116 of the lamp cap 110 provide a heat channel for conducting heat generated by the light-emitting diode wafer 144 due to energization and illumination to the second electrode 116 for heat dissipation. In one embodiment, the thermally conductive insulating material 180 may be epoxy or a thermally conductive powder such as alumina, aluminum nitride, boron oxide or other thermally conductive materials.

According to the LED bulb 100 of the present invention, the second pin 132 of the capacitor 130 is electrically connected to the electrode 147 of the LED source 140, and the first pin 134 is connected to the electrode of the LED source 140. 148 is electrically connected, so that the light emitting diode source 140 is connected in parallel with the capacitor 130. In addition, one end of the resistor 120 is electrically connected to the second electrode 116, and the other end is electrically connected to the second pin 132 of the capacitor 130 and the electrode 147 of the light emitting diode light source 140. Therefore, the resistor 120 is coupled to The parallel LED light source 140 and the capacitor 130 are connected in series. Fig. 2 shows an equivalent circuit of the light-emitting diode bulb 100 of the present invention.

According to the LED bulb 100 of the present invention, the capacitor 130 is disposed such that the light emitted by the LED source 140 is more stable. The heat generated by the LED wafer 144 during operation can be conducted to the capacitor 130 and then conducted to the second electrode 116 by the thermally conductive insulating material 180 for heat dissipation.

Although the present invention has been disclosed in the foregoing examples, it is not intended to limit the invention, and is generally Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Lighting diode bulb

110‧‧‧ lamp holder

112‧‧‧ chamber

114‧‧‧First electrode

116‧‧‧Second electrode

120‧‧‧Resistors

122‧‧‧Wire

130‧‧‧ capacitor

132‧‧‧second pin

134‧‧‧first pin

140‧‧‧Lighting diode source

142‧‧‧ bracket

144‧‧‧Light Diode Wafer

146‧‧‧Packing

147‧‧‧electrode

148‧‧‧electrode

150‧‧‧thermal adhesive

172‧‧‧ wire

174‧‧‧Wire

180‧‧‧ Thermal insulation material

190‧‧‧ lamp shell

Fig. 1 is a cross-sectional view showing a light-emitting diode bulb of the present invention.

Fig. 2 is an equivalent circuit diagram of the light-emitting diode bulb of the present invention.

100‧‧‧Lighting diode bulb

110‧‧‧ lamp holder

112‧‧‧ chamber

114‧‧‧First electrode

116‧‧‧Second electrode

120‧‧‧Resistors

122‧‧‧Wire

130‧‧‧ capacitor

132‧‧‧second pin

134‧‧‧first pin

140‧‧‧Lighting diode source

142‧‧‧ bracket

144‧‧‧Light Diode Wafer

146‧‧‧Packing

147‧‧‧electrode

148‧‧‧electrode

150‧‧‧thermal adhesive

172‧‧‧ wire

174‧‧‧Wire

180‧‧‧ Thermal insulation material

190‧‧‧ lamp shell

Claims (5)

A light-emitting diode bulb comprising: a lamp cap having a first electrode and a second electrode, the lamp cap being a hollow structure defining a chamber; a capacitor disposed in the chamber, the capacitor having a first a pin and a second pin; a resistor disposed in the chamber, one end of the resistor is electrically connected to the second electrode of the lamp cap, and the other end of the resistor is opposite to the capacitor The two pins are electrically connected; a light emitting diode light source is fixed on the top of the capacitor by a heat conductive adhesive material; and a heat conductive insulating material is filled in the chamber, and the second electrode of the lamp cap and the The capacitor is in mechanical contact. The light-emitting diode bulb of claim 1, wherein the light-emitting diode light source comprises a light-emitting diode chip fixed on a bracket, and the bracket is fixed to the capacitor by the heat-conductive adhesive material. On the top. The light-emitting diode bulb of claim 1, wherein the light-emitting diode light source has two electrodes electrically connected to the first pin and the second pin of the capacitor, respectively. The light-emitting diode bulb of claim 1, wherein the capacitor is a solid capacitor. The light-emitting diode bulb of claim 4, wherein the capacitor is an aluminum solid capacitor.