TWI516711B - Light emitting diode lamp - Google Patents

Description

Light-emitting diode bulb

The invention relates to a light-emitting diode bulb, in particular to a light-emitting diode bulb using a light-transmitting substrate to carry light-emitting diode crystal grains.

A light emitting diode (LED) is a semiconductor component that converts electrical energy into light energy through a semiconductor compound to achieve a luminous effect. Therefore, it has the advantages of long life, high stability, and low power consumption. Widely used in home, office, outdoor and mobile lighting to replace traditional non-directional light sources such as lamps and incandescent bulbs.

Referring to the first figure, it is a side view of a conventional light-emitting diode bulb. The LED bulb 20 includes a body 200, a circuit board 210, a plurality of LEDs 226, a lamp cover 230, and a conductive connector 240. The circuit board 210 and the conductive joint 240 are respectively disposed on opposite sides of the base 200. The circuit board 210 has a rectangular flat shape, and one surface of the circuit board 210 having a larger area is flatly attached to the base 200. The light-emitting diodes 226 are disposed on the circuit board 210 and are located on one surface of the circuit board 210 having a larger area. The light-emitting diodes 226 are electrically connected to the circuit board 210. The circuit board 210 is The power for illuminating the light-emitting diodes 226 is provided, wherein the light-emitting diodes 226 are illuminated to emit light in a direction opposite to the body 200. The lamp cover 230 covers the circuit board 210 and the light-emitting diodes 226 such that the circuit board 210 and the light-emitting diodes 226 are located between the base body 200 and the lamp cover 230.

Since the light-emitting diodes 220 are directional light sources, the light emitted by the light-emitting diodes 226 can only emit light toward the front (that is, the light emitted by the light-emitting diodes 226 can only face oppositely The light from the direction of the body 200 is such that the light-emitting area of the light-emitting diode bulb 20 is far less than that of an incandescent light bulb, and the light-emitting requirement of a non-directional light source such as an incandescent light bulb cannot be achieved, and the user is reduced in use of the light-emitting diode. The will of the body bulb 20.

In view of the foregoing, it is an object of the present invention to provide a light emitting diode bulb that uses a light transmissive substrate to carry light emitting diode dies.

To achieve the above objective, the present invention provides a light-emitting diode bulb comprising a circuit board, at least one light source module, a conductive joint, and a lamp cover. The board contains at least one slot. The light source module is located on one side of the circuit board. The light source module comprises a transparent substrate, a circuit layer, an electrode member and a plurality of light emitting diode dies. The transparent substrate includes a first surface and a second surface opposite to the first surface; the circuit layer is attached to at least one of the first surface and the second surface; the electrode member is disposed on One end of the light-transmitting substrate, the electrode member is inserted into the slot and electrically connected to the circuit layer, so that the light-transmitting substrate is standing on the circuit board; the light-emitting diode die is disposed first At least one of the surface and the second surface and electrically connected to the circuit layer. The conductive joint is located on the other side of the circuit board and electrically connected to the circuit board; the light cover is combined with the conductive joint to place the circuit board and the light source module between the lamp cover and the conductive joint.

According to an embodiment of the invention, the light source module further includes a phosphor layer covering the light emitting diode crystal grains.

According to an embodiment of the invention, the transparent substrate has a rectangular shape, and the electrode member is disposed in a short side direction of one of the transparent substrates.

According to an embodiment of the invention, the LED bulb further includes a driver disposed on the The circuit board is electrically connected to the circuit board.

According to an embodiment of the present invention, the light emitting diodes are respectively disposed on the first surface and the second surface, and the light emitting diodes are arranged on the second surface. The same as the light emitting diode dies disposed on the first surface.

According to an embodiment of the present invention, the illuminating diode dies are respectively disposed on the first surface and the second surface, and the illuminating diode dies disposed on the second surface are disposed on The light-emitting diode crystal grains of the first surface are arranged in a dislocation manner.

According to an embodiment of the present invention, the light-emitting diode bulb further includes a plurality of light source modules, and the electrode members of each of the light source modules are inserted into a plurality of slots formed on the circuit board, so that the light source modules are The light transmissive substrate is standing on the circuit board.

According to an embodiment of the invention, the light source modules are linearly arranged on the circuit board, and the distance between any two light source modules is a certain value.

According to an embodiment of the invention, the light transmissive substrate has a light transmittance of 50% or more.

According to an embodiment of the invention, the material of the transparent substrate is selected from the group consisting of alumina, gallium nitride, glass, gallium phosphide, tantalum carbide and chemical vapor deposited diamond.

10, 10a, 10b‧‧‧Light Bulbs

110‧‧‧Base

120‧‧‧ boards

122‧‧‧Slots

126‧‧‧ board

130, 130a, 130b‧‧‧ light source module

132, 132a‧‧‧Transparent substrate

1320, 1320a‧‧‧ first surface

1322, 1322a‧‧‧ second surface

134, 134a‧‧‧ circuit layer

135‧‧‧Electrode parts

136, 136a‧‧‧Lighting diode

138a‧‧‧Fluorescent layer

140‧‧‧shade

150‧‧‧Electrical connector

170‧‧‧ drive

20‧‧‧Lighting diode bulb

200‧‧‧ body

210‧‧‧ boards

226‧‧‧Lighting diode

230‧‧‧shade

240‧‧‧Electrical connector

The first figure is a side view of a conventional light-emitting diode bulb.

Fig. 2 is a perspective view of a light-emitting diode bulb according to a first embodiment of the present invention.

Fig. 3 is a cross-sectional view showing a light-emitting diode bulb according to a first embodiment of the present invention.

The fourth figure is a cross-sectional view of a light-emitting diode bulb according to a second embodiment of the present invention.

Fig. 5 is a cross-sectional view showing a light-emitting diode bulb according to a third embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more apparent from the <RTIgt;

Referring to the second and third figures, respectively, a perspective view and a cross-sectional view of a light-emitting diode bulb according to a first embodiment of the present invention. The light-emitting diode bulb 10 is mainly used to provide a light source similar to the light intensity distribution generated by the incandescent light bulb. The light-emitting diode bulb 10 includes a base 110, a circuit board 120, and at least one light source module 130. A lamp cover 140 and a conductive joint 150.

The base 110 can be made of, for example, but not limited to, a plastic or ceramic. In this embodiment, the base 110 is a circular cylinder, which is not limited in practice. The pedestal 110 is used to support the circuit board 120 and the light source module 130.

The circuit board 120 is disposed on one side of the base 110. In the embodiment, the circuit board 120 is an FR4 fiberglass circuit board having high mechanical strength, non-combustible and moisture-proof characteristics. In actual implementation, the circuit board 120 can be a metal-based circuit board or other types according to actual needs. The printed circuit board is next; the circuit board 120 is substantially circular, and the surface area of the board 120 having a larger area is smaller than the area of the surface of the base 110 in contact with the circuit board 120. The circuit board 120 has at least one slot 122 therein. The slot 122 is a slot structure extending through the circuit board 120. The circuit board 120 is provided with a driver 170 for driving the light source module 130 to emit light, and the driver 170 is electrically connected to the circuit board 120.

The light source module 130 includes a transparent substrate 132, a circuit layer 134, an electrode member 135, and a plurality of light emitting diode dies 136. The transparent substrate 132 is a glass substrate, and the transmittance of the transparent substrate 132 is 50% or more. The light transmittance refers to the light intensity passing through the transparent substrate 132 and the light transmitting substrate 132. The ratio of the light intensity. The material of the transparent substrate 132 may be selected from the group consisting of alumina, gallium nitride, glass, gallium phosphide, tantalum carbide and chemical vapor deposited diamond. a group of materials. The transparent substrate 132 has a first surface 1320 and a second surface 1322 opposite to the first surface. In the embodiment, the transparent substrate 132 is a rectangular plate, the first surface 1320 and the second surface. 1322 is a surface having a large area of the transparent substrate 132. In actual implementation, the transparent substrate 132 can be other geometric shapes, such as a circle or a polygon, according to actual needs.

The circuit layer 134 is attached to at least one of the first surface 1320 and the second surface 1322 of the transparent substrate 132. The circuit layer 134 is made of a material having conductive properties (such as copper). Used as a path for power transmission. In this embodiment, the circuit layer 134 is disposed on the first surface 1320 and the second surface 1322. The circuit layer 134 is disposed in a strip shape, and the circuit layer 134 is the same length as the first surface 1320 and The length of the second surface 1322.

The electrode member 135 is disposed at one end of the transparent substrate 132 and electrically connected to the circuit layer 134. In this embodiment, the electrode member 135 is disposed in a short side direction of the transparent substrate 132, and the circuit Layer 134 forms an electrical connection. The electrode member 135 is inserted into the slot 122 such that the first surface 1320 and the second surface 1322 of the transparent substrate 132 are perpendicular to a plate surface 126 of the circuit board 120, so that the transparent substrate 132 is The circuit board 120 and the light source module 130 are electrically connected to each other on the circuit board 120. Next, the electrode member 135 and the socket 122 can be fixed to the circuit board 120 by solder (not shown) to improve the bonding strength between the electrode member 135 and the socket 122. And conductivity.

The light emitting diode dies 136 are respectively disposed on at least one of the first surface 1320 and the second surface 1322 of the transparent substrate 132, and are electrically connected to the circuit layer 134. The illuminating diode dies 136 are connected in series, in parallel, or in series and in parallel by the circuit layer 134. In this embodiment, the light emitting diode dies 136 are simultaneously disposed on the The first surface 1320 and the second surface 1322 have the same number of light emitting diode dies 136 disposed on the first surface 1320 and the second surface 1322, and the LED 136 is disposed on the second surface. The position of the light-emitting diode die 136 disposed on the first surface 1320 is the same as that of the light-emitting diode die 136 disposed on the second surface 1322. The light emitting diode dies 136 of the first surface 1320. The LED 136 can be fixed to the transparent substrate 132 by a die attachment technique and then electrically connected to the circuit layer 134. The LED 136 may be a flip chip in the form of a flip chip, and the electrodes directly contact the circuit layer 134. Alternatively, the LED 136 may be The LED structure of the horizontal structure or the vertical structure is electrically connected to the circuit layer 134 by at least one metal bonding wire. Since the light transmittance of the light-transmitting substrate 132 is greater than 50%, the light emitted by the light-emitting diode crystal grains 136 can be prevented from being shielded or absorbed by the light-transmitting substrate 132, thereby improving the light-emitting diode. The light utilization efficiency of the bulb 10.

The conductive connector 150 is disposed on the other side of the circuit board 120 and coupled to the lamp cover 140 such that the circuit board 110 and the light source module 130 are respectively disposed between the conductive connector 150 and the lamp cover 140. The lamp cover 140 can be selectively designed to be transparent or translucent to adjust the light intensity of the light emitted through the lamp cover 140. Meanwhile, the lamp cover 140 can also be used to adjust the light emitted by the light emitting diode die 136. The light-emitting characteristics of the light, such as condensing or astigmatism, make the optical characteristics of the light-emitting diode bulb 10 more in line with actual needs. The conductive joint 150 is connected to the luminaire for drawing power to illuminate the illuminating diode bulb 10. A plurality of wires (not shown) are connected between the conductive connector 150 and the circuit board 120, and the wires can pass through the base 110, and the wires are used to transmit power drawn by the conductive connector 150 to the The circuit board 120 is transmitted by the electrode member 135 The light source module 130 is delivered to illuminate the light emitting diode dies 136.

Referring to the fourth figure, a perspective view of a light-emitting diode bulb according to a second embodiment of the present invention is shown. The light-emitting diode bulb 10a shown in the fourth figure is similar to the light-emitting diode bulb 10 of the first embodiment, and the same elements are denoted by the same reference numerals. It is worth noting that the difference between the two is: the light source module 130a shown in the fourth figure.

The light source module 130a includes a transparent substrate 132a, a circuit layer 134a, a plurality of light emitting diode dies 136a, and a phosphor layer 138a. The circuit layer 134a is disposed on a first surface 1320a of the transparent substrate 132a and a second surface 1322a opposite to the first surface 1320a.

The LEDs 136a are respectively disposed on the first surface 1320a and the second surface 1322a, and are electrically connected to the circuit layer 120, and are disposed on the first surface 1320a. The polar crystal grains 136a are arranged in a staggered manner with the light emitting diode crystal grains 136a disposed on the second surface 1322a.

The phosphor layer 138a covers the LED dipoles 136a for wavelength conversion with a portion of the light emitted by the LED dipoles 136a and generates a wavelength-converted light. The wavelength-converted light is mixed with other portions of the light emitted by the light-emitting diode dies 136a to generate a light of a desired color. In this embodiment, the phosphor layer 138a simultaneously covers a plurality of light emitting diode dies 136a disposed on the first surface 1320a or the second surface 1322a, thereby improving the convenience in fabrication. In actual implementation, the phosphor layer 138a may also cover only at least one of the light emitting diode dies 136a. The function and related description of each element of the light-emitting diode bulb 10a are substantially the same as those of the light-emitting diode bulb 10 of the first embodiment, and will not be described herein. The light-emitting diode bulb 10a can at least achieve the same function as the light-emitting diode bulb 10.

Referring to FIG. 5, a perspective view of a light-emitting diode bulb according to a third embodiment of the present invention is shown. First The light-emitting diode bulb 10b shown in FIG. 5 is similar to the light-emitting diode bulb 10a of the second embodiment, and the same elements are denoted by the same reference numerals. It should be noted that the difference between the two is that the LED bulb 10b shown in FIG. 5 includes a plurality of linear arrays of light source modules 130b.

The light source modules 130b are respectively inserted into a plurality of slots 122 formed on the circuit board 120 to provide a light source required for the LEDs 10b to illuminate. Secondly, the distance between any two light source modules 130b is a certain value, so that not only the brightness of the light-emitting diode bulb 10b but also a light source of uniform light intensity distribution can be provided. In actual implementation, the arrangement of the light source modules 130b may be other forms according to the required light intensity, such as irregular shapes. The function and related description of each element of the light-emitting diode bulb 10b are substantially the same as those of the light-emitting diode bulb 10a of the second embodiment, and will not be described herein. The light-emitting diode bulb 10b can at least achieve the same function as the light-emitting diode bulb 10a.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

10‧‧‧Lighting diode bulb

110‧‧‧Base

120‧‧‧ boards

130‧‧‧Light source module

132‧‧‧Transparent substrate

134‧‧‧ circuit layer

135‧‧‧Electrode parts

136‧‧‧Lighting diode

140‧‧‧shade

150‧‧‧Electrical connector

170‧‧‧ drive

Claims (10)

A light-emitting diode bulb comprising: a circuit board comprising at least one slot; at least one light source module standing on the circuit board, the light source module comprising: a transparent substrate comprising a first surface and a second surface opposite to the first surface; a circuit layer disposed on at least one of the first surface and the second surface; an electrode member disposed on the first surface and the second surface And the plurality of light-emitting diode dies are disposed in the socket; and at least one of the first surface and the second surface is disposed, and the plurality of light-emitting diode dies are The circuit board forms an electrical connection; a conductive connector is coupled to the circuit board; and a lamp cover is coupled to the conductive connector. The light-emitting diode bulb of claim 1, wherein the light source module further comprises a phosphor layer covering the light-emitting diode crystal grains. The light-emitting diode bulb of claim 1, wherein the light source module can pass through the circuit board. The light-emitting diode bulb of claim 1, further comprising a driver disposed on the circuit board and electrically connected to the circuit board. The illuminating diode bulb of claim 1, wherein the illuminating diode dies are disposed on the first surface and the second surface in the same arrangement. The illuminating diode bulb of claim 1, wherein the illuminating diode dies are disposed on the first surface and the second surface in a misaligned manner. The light-emitting diode bulb of claim 1, further comprising a plurality of light source modules, wherein the electrode members of each of the light source modules are inserted into a plurality of slots formed on the circuit board, so that the light sources are The transparent substrate of the module stands on the circuit board. The light-emitting diode bulb of claim 7, wherein the light source modules are linearly arranged on the circuit board, and the distance between any two light source modules is a certain value. The light-emitting diode bulb according to claim 1, wherein the light-transmitting substrate has a light transmittance of 50% or more. The light-emitting diode bulb according to claim 1, wherein the material of the transparent substrate is selected from the group consisting of alumina, gallium nitride, glass, gallium phosphide, tantalum carbide and chemical vapor deposited diamond. Ethnic group.