TW202111253A - Led bulb - Google Patents

Abstract

The invention discloses an LED bulb, which comprises: a lamp shell; a LED filament, the LED filament is placed in the lamp shell and has a light emitting surface; at least one passive component, the passive component is placed in the lamp shell and located away from the emitting surface, and electrically connected the LED filament; and two wires, one of the wires is electrically connected to the passive component, used to power the LED filament through the passive component.

Description

LED bulb

The present invention relates to the field of lighting. More specifically, it relates to an LED bulb with built-in passive components.

After the LED bulb is energized, the LED filament components in the lamp shell have their withstand voltage and current limits. To avoid the LED components from being burnt due to overload, the passive component 23 (that is, the current limiting resistor) is used for current limiting and voltage division processing. . Generally speaking, as shown in FIG. 4, the aforementioned passive component 23 may be a plug-in resistor (DIP resistor) placed in a lamp holder for fitting the LED lamp housing.

)，而該被動元件23所產生之高溫易造成燈頭接著劑碳化而導電，從而導致LED燈泡內部構件電性短路進而造成毀損或產生危機。In the current manufacturing process of LED bulbs, the passive component 23 and the guide wire must be manually welded, then the lamp holder is placed to set the passive component 23, and then the lamp housing and the lamp holder are connected through an adhesive (resin). However, the process of setting the passive element 23 and injecting the adhesive is time-consuming and labor-intensive, so the manufacturing cost of the LED bulb cannot be effectively reduced at all. Since the power consumption of the resistor is real power, the passive component 23 is prone to high temperature when the LED bulb is energized (

), and the high temperature generated by the passive component 23 may easily cause the lamp cap adhesive to be carbonized and conduct electricity, which may cause electrical short-circuit of the internal components of the LED bulb, thereby causing damage or crisis.

In view of the above-mentioned various problems of the prior art, the main purpose of the present invention is to provide an LED bulb, which can effectively solve the risk of electrical short circuit caused by the high heat generated by the passive component after the conventional LED bulb is energized and lighted, and the risk of electrical short-circuit caused by the carbonization of the adhesive is effectively shortened and the manufacturing time is reduced. The production cost also solves the problem of insufficient space for passive components in the small lamp holder of the LED bulb or possible electrical short circuit and the problem of no space for passive components in the LED bulb without a lamp holder.

In order to achieve the above objectives and other objectives, the present invention provides an LED bulb, the LED bulb includes: a lamp housing; an LED filament, the LED filament is accommodated in the lamp housing, and has a light-emitting surface; at least one passive Element, the passive element is accommodated in the lamp housing, and is located at a position avoiding the light-emitting surface, and is electrically connected to the LED filament; and two guide wires, one of the two guide wires is electrically connected to the The passive element is used to supply power to the LED filament via the passive element.

In the above-mentioned LED bulb, the LED filament has a light-emitting body, a head end and a tail end, the light-emitting surface is located on the outer surface of the light-emitting body, and the head end and the tail end are respectively located at the head and tail of the light-emitting body Both ends, and the passive component is electrically connected to the head end or the tail end.

The above-mentioned LED bulb also includes a current-limiting circuit, the current-limiting circuit is housed in the lamp housing, and is used to limit the supply current so that the current range of the guide wire for supplying power to the LED filament meets expectations, and the passive component is The resistor placed in the current-limiting circuit.

The above-mentioned LED bulb also includes a capacitor step-down circuit, which is housed in the lamp housing, and is used to provide step-down so that the voltage range of the guide wire for supplying power to the LED filament meets expectations, and the passive component It is the capacitor arranged in the capacitor step-down circuit.

In the above LED bulb, the capacitor and the resistor are connected in series with each other and electrically connected with the LED filament.

The above-mentioned LED bulb also includes a capacitor step-down circuit, which is housed in the lamp housing, and is used to provide step-down so that the voltage range of the guide wire for supplying power to the LED filament meets expectations, and the passive component It is the capacitor arranged in the capacitor step-down circuit.

The above-mentioned LED bulb also includes a current stabilization circuit which is housed in the lamp housing and is used to provide a stable current to stabilize the current supplied by the guide wire to the LED filament, and the passive element is arranged on the Constant current diode in steady current circuit.

In the above-mentioned LED bulb, the passive component is an electronic part of a surface-mounted component (namely, Surface-Mount Devices; SMD for short).

The above-mentioned LED bulb also includes a stem which extends into the lamp housing to provide positioning for the guide wire.

In the above-mentioned LED bulb, the lamp housing provides a protective cover for the LED filament and fixes the guide wire to provide positioning for the guide wire.

In the above-mentioned LED bulb, the angle at which the LED filament and the passive element intersect is substantially between 90 degrees and 180 degrees.

In the above-mentioned LED bulb, the lamp housing is a translucent lamp housing.

In the above LED bulb, the translucent lamp shell is a glass lamp shell or a plastic lamp shell.

In summary, the LED bulb of the present invention has the at least one passive element built into the lamp housing to effectively avoid the problem of electrical short-circuiting of the internal components of the LED bulb due to the high temperature generated by the passive element and the carbonization of the lamp cap adhesive. ; Preferably, the LED bulb of the present invention uses SMD passive components that can be welded through automated equipment in the lamp housing, without the need for manual welding of passive components, so as to effectively save manpower and reduce manufacturing costs, while also solving the small lamp holder of the LED bulb Insufficient space for passive components may cause electrical short circuits and LED bulbs without caps have no space to accommodate passive components.

The following content will be combined with the drawings to illustrate the technical content of the present invention through specific specific embodiments. Those familiar with this technology can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments. Various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of the present invention. In particular, the proportional relationship and relative positions of the various elements in the drawings are only for exemplary purposes, and do not represent the actual implementation of the present invention.

For the technical disclosure of the present invention, please refer to FIGS. 1A, 1B and 2 in the drawings.

As shown in Figures 1A and 1B, Figure 1A is a front view of the LED light bulb of the present invention, and Figure 1B is a side view of the LED light bulb shown in Figure 1A rotated 90 degrees clockwise, the LED light bulb 1 of the present invention The system includes: a lamp housing 11, an LED filament 12, at least one passive component 13 and two guide wires 14, wherein the lamp housing 11 is a translucent lamp housing such as a glass lamp housing or a plastic lamp housing, the LED filament 12 and passive components 13 are all contained in the lamp housing 11, and the LED filament 12 has a light-emitting surface 121, a light-emitting body 122, a head end 123, and a tail end 124. The light-emitting surface 121 is located on the outer surface of the light-emitting body 122 and the head end 123 The tail end 124 and the tail end 124 are respectively located at the head and tail ends of the light-emitting body 122. The LED filament 12 in this embodiment is a non-polar LED filament, but it is not limited to this.

In one embodiment, the passive element 13 is located at a position avoiding the light-emitting surface 121 to avoid blocking the light-emitting surface 121 on the light-emitting body 122, which may cause the LED bulb 1 to be shielded from light.

Two points of explanation must be added here. The first point is the positional relationship between the passive element 13 and the LED filament 12, which is not limited to the passive element provided between the tip 123 of the LED filament 12 and the guide wire 14 as shown in FIG. 1A. The element 13 can also be provided with the passive element 13 between the tail end 124 of the LED filament 12 and the guide wire 14. That is, the passive element 13 is electrically connected to the head end 123 or the tail end 124 of the LED filament 12, and the passive element 13 is electrically connected to the head end 123 or the tail end 124 of the LED filament 12. The connection between the element 13 and the LED filament 12 is not limited to the straight type shown in FIG. 1A, but may also be a horizontal type. In other words, the angle at which the LED filament 12 and the passive element 13 intersect after the connection is substantially between The angle between 90 degrees and 180 degrees is acceptable. The second point is that the arrangement relationship between the passive element 13 and the LED filament 12 is not limited to those shown in FIGS. 1A and 1B. The LED filament 12 can be electrically connected to multiple passive elements 13 in series, or simultaneously. Two or more passive components 13 are connected in series.

One of the two guide wires 14 is electrically connected to the passive element 13 for supplying power to the LED filament 12 through the passive element 13. As can be seen from FIGS. 1A and 1B, the tail of the lamp housing 11 has an accommodating space 110 for accommodating the two guide wires 14, and the two guide wires 14 are clamped and fixed by the tails of the lamp housing 11.

The passive component 13 of the LED bulb 1 of the present invention is an electronic component of a surface-mounted component (Surface-Mount Devices; SMD for short). Since the passive component 13 of the SMD type is small in size, the problem of shading is not big, so the passive component When the 13 is placed at the head end 123 or the tail end 124 of the LED filament 12, it is not necessary to particularly consider the problem of the light source of the LED filament 12 being blocked. In the present invention, the electronic component as the passive component 13 can be a resistor, a capacitor, or a constant current diode, but it is not limited thereto.

)，但因內置於該燈殼11內，並不與用以黏合該燈殼11與燈頭16的接著劑接觸，故並不會發生因通電時電阻產生高溫而使燈頭16內的接著劑碳化而導致電性短路的危機，亦可將被動元件13的電阻與電容同時串接，如此可以有效降低被動元件13電阻產生高溫的程度，同時也可有效提升LED燈絲的發光效率，並降低電阻之實功率且提升節能效益。For example, in one embodiment, the LED bulb 1 of the present invention includes a current-limiting circuit, the current-limiting circuit is accommodated in the lamp housing 11 for limiting the supply current so that the guide wire 14 is the LED filament 12 The current range of the power supply meets expectations, and the passive element 13 is, for example, a resistor arranged in the current limiting circuit. The passive element 13 is used to provide a partial voltage current limiting process after the LED bulb 1 is powered on to avoid the The LED filament 12 in the lamp housing 11 is overloaded with current. It should also be noted that although the resistance is real power, it is easy to generate high temperature when the current passes (

), but because it is built into the lamp housing 11 and does not contact the adhesive used to bond the lamp housing 11 and the lamp cap 16, carbonization of the adhesive in the lamp cap 16 will not occur due to the high temperature generated by the resistance during power-on As a result of the crisis of electrical short circuit, the resistance of the passive element 13 can also be connected in series with the capacitor at the same time. This can effectively reduce the degree of high temperature generated by the resistance of the passive element 13. At the same time, it can effectively improve the luminous efficiency of the LED filament and reduce the resistance. Real power and improve energy-saving benefits.

In another embodiment, the LED bulb 1 of the present invention includes a capacitor step-down circuit, the capacitor step-down circuit is housed in the lamp housing 11 for providing a step-down voltage so that the guide wire 14 provides power to the LED filament 12 The voltage range is in line with expectations, and the passive element 13 is a capacitor placed in the capacitor step-down circuit (because the appearance of the capacitor and the resistor are very similar, the capacitor is not shown separately in the figure). The lamp housing 11 is built into the capacitor. Since the LED filament 12 connected in series by the capacitor has no polarity, the capacitor consumes virtual power when the LED filament 12 is energized and emits light, and the actual power consumed by the capacitor is very small. The problem of overheating of the energized passive component 13 will occur, and at the same time, the luminous efficiency of the LED bulb 1 can be improved and the actual power consumption can be reduced.

In yet another embodiment, the LED bulb 1 of the present invention includes a current stabilizing circuit, the current stabilizing circuit is housed in the lamp housing 11, for providing a steady current to enable the guide wire 14 to power the LED filament 12 The passive component 13 is a constant current diode arranged in the steady current circuit. The constant current diode can be used as a steady current component (because the steady current component and the resistance icon are very similar in appearance, the diagram No additional illustration for the constant current components in the) provides a stable current. Since the passive component 13 built into the lamp housing 11 can be of SMD type, the passive component 13 in the lamp holder 16 can be welded through automated equipment, thereby effectively saving manpower and reducing manufacturing costs. In addition, it should be specifically stated that the LED bulb 1 of the present invention is not limited to the lamp cap 16 shown in FIGS. 1A and 1B, and can also be an LED bulb without a lamp cap, that is, the present invention can be applied to a small lamp cap. LED bulbs and LED bulbs without caps. As shown in FIG. 3, the LED bulb does not need to pass through the reserved space of the lamp cap to install the passive element 13, so that the LED bulb of the present invention can be applied to, for example, Christmas light strings and LED bulbs using small caps.

Next, as shown in FIG. 2, which is used to illustrate the appearance of another embodiment of the LED bulb of the present invention, the LED bulb 1'of this embodiment is different from the LED bulb 1 of the embodiment of FIG. 1A in that it also includes a stem 15 That is, the LED bulb of the present invention can be applied to a stem-type LED bulb. The guide wires 14 at both ends of the LED filament 12 of this embodiment are joined to the stem 15, and the stem 15 extends into the lamp housing 11, so that The two guide wires 14 are positioned in the lamp housing 11 so that the two guide wires 14 support the LED filament 12 in the lamp housing 11 so that the position of the LED filament 12 meets expectations.

The above-mentioned embodiments only exemplarily illustrate the principles and effects of the present invention, and are not used to limit the present invention. Anyone familiar with the technology can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be as listed in the scope of the patent application of the present invention.

1,1': LED bulb 11: Lamp housing 110: accommodating space 12: LED filament 121: light-emitting surface 122: luminous body 123: Headend 124: End 13,23: Passive components 14: Guide wire 15: stem 16: lamp holder

According to the above-mentioned features and other advantages of the present invention and other aspects of the present invention, it will be more clearly understood in conjunction with the detailed description of the following drawings.

Figure 1A is a front view for explaining the LED bulb of the present invention;

Figure 1B is a side view illustrating the LED bulb shown in Figure 1A rotated 90 degrees clockwise;

2 is a structural diagram for explaining an embodiment of the LED bulb of the present invention applied to a stem-type LED bulb;

FIG. 3 is a structural diagram for explaining an embodiment of the LED bulb of the present invention applied to an LED bulb without a cap; and

Fig. 4 is a structural diagram for explaining the conventional LED bulb.

1: LED bulb

11: Lamp housing

110: accommodating space

12: LED filament

121: light-emitting surface

122: luminous body

123: Headend

124: End

13: Passive components

14: Guide wire

16: lamp holder

Claims (13)

An LED light bulb, which includes: A lamp housing; An LED filament, the LED filament is accommodated in the lamp housing and has a light-emitting surface; At least one passive element, the passive element is accommodated in the lamp housing, is located at a position avoiding the light-emitting surface, and is electrically connected to the LED lamp; and Two guide wires, one of the two guide wires is electrically connected to the passive element for supplying power to the LED filament through the passive element. The LED bulb described in item 1 of the scope of patent application, wherein the LED filament has a light-emitting body, a head end and a tail end, the light-emitting surface is located on the outer surface of the light-emitting body, and the head end and the tail end The ends are respectively located at the head and tail ends of the light-emitting body, and the passive element is electrically connected to the head end or the tail end. The LED bulb described in item 1 of the scope of patent application further includes a current limiting circuit which is housed in the lamp housing and is used to limit the supply current so that the guide wire can supply power to the LED filament. As expected, the passive component is a resistor arranged in the current limiting circuit. As described in item 3 of the scope of patent application, the LED bulb further includes a capacitor step-down circuit, the capacitor step-down circuit is housed in the lamp housing for providing step-down voltage so that the guide wire can supply power to the LED filament The voltage range is in line with expectations, and the passive element is a capacitor arranged in the capacitor step-down circuit. According to the LED bulb described in item 4 of the scope of patent application, the capacitor and the resistor are connected in series with each other and electrically connected with the LED filament. The LED bulb described in item 1 of the scope of patent application further includes a capacitor step-down circuit, which is housed in the lamp housing and used to provide step-down voltage so that the guide wire can supply power to the LED filament The voltage range is in line with expectations, and the passive element is a capacitor arranged in the capacitor step-down circuit. The LED bulb as described in item 1 of the scope of patent application, further includes a current stabilizing circuit, which is housed in the lamp housing and used to provide a steady current to stabilize the current supplied by the guide wire to the LED filament , And the passive component is a constant current diode arranged in the steady current circuit. For the LED light bulb described in item 1 of the scope of patent application, the passive component is an electronic part of a surface-mounted component. For example, the LED bulb described in item 1 of the scope of patent application further includes a stem, which extends into the lamp housing to provide positioning for the guide wire. According to the LED bulb described in item 1 of the scope of patent application, the lamp housing provides a protective cover for the LED filament and fixes the guide wire to provide positioning for the guide wire. According to the LED bulb described in item 1 of the scope of patent application, the angle at which the LED filament and the passive element intersect is substantially between 90 degrees and 180 degrees. For the LED bulb described in item 1 of the scope of patent application, the lamp housing is a light-transmitting lamp housing. For the LED bulb described in item 12 of the scope of patent application, the light-transmitting lamp housing is a glass lamp housing or a plastic lamp housing.

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