WO2019029660A1

WO2019029660A1 - Pin-based light bulb

Info

Publication number: WO2019029660A1
Application number: PCT/CN2018/099818
Authority: WO
Inventors: Yehua Wan; Jinxiang Shen
Original assignee: Zhejiang Shenghui Lighting Co., Ltd.
Priority date: 2017-08-10
Filing date: 2018-08-10
Publication date: 2019-02-14
Also published as: CN107388065A

Abstract

A pin-based light bulb includes a glass cover (6), a bulb base (1), a light-emitting element (5), at least one bulb pin (2), and a power supply element (3). The glass cover (6) includes a closed first cavity and the light-emitting element (5) is disposed in the first cavity. The bulb base (1) is connected to one end of the glass cover (6) and includes a second cavity. The power supply element (3) is disposed in the second cavity and fixedly connected to the bulb base (1). A first end of the at least one bulb pin (2) is connected to the power supply element (3). A second end of the at least one bulb pin (2) is configured to pass through the bulb base (1) and be connected to an external power supply (U0). The power supply element (3) is configured to use the external power supply (U0) connected to the at least one bulb pin (2) to provide power for the light-emitting element (5).

Description

PIN-BASED LIGHT BULB

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority of Chinese Patent Application No. 201710681984.8, filed on August 10, 2017, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The disclosure relates to the field of lighting, in particular to a pin-based light bulb.

BACKGROUND

A pin-based light bulb, also referred as a pin type light bulb, can be plugged into a bulb base, and usually includes a glass cover, a light-emitting element disposed in a cavity of the glass cover, and at least one pin configured to connect the light-emitting element to power supply and realize external plug-in connection.

In conventional technologies, the pin-based light bulb also includes a power supply circuit configured to process the external power supply that the at least one pin is connected to and drive the light-emitting element to emit light. The power supply circuit and the light-emitting element may be disposed on a same substrate and collectively packaged inside the glass cover. In this way, elements of both the power supply circuit and the light-emitting element can generate heat, causing poor heat dissipation of the entire pin-based light bulb.

SUMMARY

To solve the poor heat dissipation problem, the present disclosure provides a pin-based light bulb.

The pin-based light bulb includes a glass cover, a bulb base, a light-emitting element, at least one bulb pin, and a power supply element. The glass cover includes a closed first cavity and the light-emitting element is disposed in the first cavity. The bulb base is connected to one end of the glass cover and includes a second cavity, where the power supply element is disposed in the second cavity and fixedly connected to the bulb base. A first end of the at least one bulb pin is connected to the power supply element, and a second end of the at least one bulb pin is configured to pass through the bulb base and be connected to an external power supply. The power supply element is configured to use the external power supply connected to the at least one bulb pin to provide power for the light-emitting element.

Optionally, the power supply element includes a circuit board and a power supply circuit disposed on the circuit board. The circuit board is disposed in the bulb base, and the first end of the at least one bulb pin is fixed to the circuit board and is electrically connected to the power supply circuit. The light-emitting element is fixedly connected to the circuit board through at least one connection pin and is electrically connected to the power supply circuit.

Optionally, a middle portion of the at least one connection pin is melt-sealed with one end of the cover glass.

Optionally, the power supply circuit includes a rectifier element and a voltage regulation driving element, an input terminal of the rectifier element is connected to the at least one bulb pin, and an output terminal of the rectifier element is connected the voltage regulation driving element. The rectifier element is configured to rectify the external power supply and supply the rectified power supply to the voltage regulation driving element. The voltage regulation driving element is configured to use the supplied power to drive the light-emitting element to emit light.

Optionally, the voltage regulation driving element is a linear voltage regulator.

Optionally, the voltage regulation driving element includes a voltage-current conversion sub-circuit and a first resistor. An output terminal of the voltage-current conversion sub-circuit is connected to a first terminal of the first resistor, an input terminal of the voltage-current conversion sub-circuit is connected to the rectifier element, a sampling terminal of the voltage-current conversion sub-circuit is connected to a second terminal of the first resistor, and the second terminal of the first resistor is connected to the light-emitting element.

Optionally, the voltage regulation driving element is a switching regulator.

Optionally, the voltage regulation driving element includes a voltage-current conversion sub-circuit, a first resistor, a first diode, a first inductor, and a third capacitor. An output terminal of the voltage-current conversion sub-circuit is connected to a first terminal of the first resistor. An input terminal of the voltage-current conversion sub-circuit is connected to the rectifier element. An output terminal of the first diode and the first terminal of the first resistor are connected to the output end of the voltage-current conversion sub-circuit. A first terminal of the first inductor and a second terminal of the first resistor are connected to a sampling terminal of the voltage-current conversion sub-circuit. A third capacitor is connected in parallel with both terminals of the light-emitting element. A first terminal of the third capacitor is further connected to a second terminal of the first inductor. A second terminal of the third capacitor, the output terminal of the light-emitting element, and the input terminal of the first diode are grounded.

Optionally, the bulb base includes a base body and an extension body. A first end of the base body is connected to the cover glass, a second end of the base body is connected to the extension body, and the second cavity body is disposed in the base body. At least one pin path that matches a shape of the at least one bulb pin is disposed in the extension body, and the least one bulb pin is inserted in the at least one pin path.

Optionally, the base body has a cylindrical shape, the extension body has a flat shape, and the cover glass has a cylindrical shape that matches the base body.

Optionally, the light-emitting element includes a substrate and an LED chip disposed on the substrate. The LED chip is electrically connected to the power supply element through at least one connection pin. The substrate is fixedly connected to the at least one connection pin.

Optionally, a surface of the LED chip is coated with phosphor powders.

Optionally, a quantity of the at least one bulb pin is two and a distance between the two bulb pins is 9 mm.

Optionally, the glass cover further includes a vent.

According to the embodiments of the present disclosure, the light-emitting element may be disposed in the first cavity of the glass cover, the bulb base may be connected to one end of the glass cover and the power supply element may be disposed in the second cavity of the bulb base. Such that, the pin-based light bulb according to embodiments of the present disclosure can realize a separation of the light-emitting element and the power supply element to improve heat dissipation. In addition, the power supply element may be fixedly connected to the bulb base, the first end of the bulb base is connected to the power supply element and the second end may pass through the bulb base and connect to the external power supply. The pin-based light bulb according to embodiments of the present disclosure can realize a fixed connection between the power supply element and the bulb base, ensuring the structural stability of the pin-based light bulb and the stability of the electrical connection.

DESCRIPTION OF THE DRAWINGS

To more clearly explain the embodiments of the present disclosure or the technical solutions in a conventional technology, the drawings used in the description of the embodiments or the conventional technology are briefly described below. Obviously, the drawings described below illustrate only some embodiments of the present disclosure. For those skilled in the art, other drawings may also be obtained based on these drawings without creative efforts.

FIG. 1 is a structural view of a pin-based light bulb according to some embodiments of the present disclosure;

FIG. 2 is a circuit diagram of a power supply circuit of some embodiments of the present disclosure; and

FIG. 3 is a circuit diagram of a power supply circuit according to some other embodiments of the present disclosure.

Reference numerals in the drawings: 1-bulb base; 11-base body; 12-extension body; 2-bulb pin; 3-power supply element; 31-power supply circuit; 32-circuit board; 4-connector pin; 5-light-emitting element; 6-glass cover; U0-external power supply; U1-rectifier sub-circuit; U2-voltage-current conversion sub-circuit; C1-first capacitor; C2-second capacitor; R1-first resistance; T1-first inductor; D1-first diode; and C3-third capacitor.

DETAILED DESCRIPTION

The following clearly describes the technical solutions according to embodiments of the present disclosure with reference to the accompanying drawings. Apparently, described embodiments are merely some but not all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of the present disclosure.

Some terms “first” “second” “third” “fourth” and the like, if any, in the specification and claims of the present disclosure and in the above drawings are used to distinguish similar objects and are not necessarily for describing a specific order or sequence. It should be understood that these terms may be interchanged where appropriate, so that the embodiments of the disclosure described herein can be implemented, for example, in other sequences than those illustrated or described herein. In addition, terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to some steps or units that are clearly listed but may include other steps or units that are not explicitly listed or inherent to the process, method, system, product, or apparatus.

The technical solutions of the present disclosure are described in detail with specific embodiments below. The following embodiments can be combined with each other, and some same or similar concepts or processes may not be repeated in some embodiments.

FIG. 1 is a structural diagram of a pin-based light bulb according to some embodiments of the present disclosure. The pin-based light bulb may include a glass cover 6, a bulb base 1, a light-emitting element 5, one or more bulb pins 2 and a power supply element 3.

The glass cover 6 may include a closed first cavity. The light-emitting element 5 may be disposed in the first cavity. The first cavity can be regarded as a closed cavity. The glass cover 6 may be made by glass and include an opening at one end thereof. The opening of the glass cover can be melt-sealed or sealed by other treatment, so as to form the first cavity. The first cavity may be a cylinder-shaped cavity and inflated with gas. The glass cover 6 may also include a vent. The vent may be a single vent that have both gas-intake and gas-exhaust functions, or may include separately-configured gas inlet and gas outlet. The vent may be sealed.

The bulb base 1 may be connected structurally, to one end of the glass cover 6, by any proper fixation mechanism such as gluing. The bulb base 1 may include a second cavity. The power supply element 3 may be disposed in the second cavity, and fixedly connected to the bulb base 1. The second cavity may be referred as a cavity disposed in the bulb base 1 and configured to accommodate the power supply element 3. The second cavity may be closed or unclosed. The bulb base 1 can be made any material and connected to one end of the glass cover 6 that has the sealed opening.

A first end of each bulb pin 2 may be connected to the power supply element 3 and a second end of each bulb pin 2 may pass through the bulb base 1 and connect to an external power supply.

The power supply element 3 may be configured to use the external power supply connected to the one or more bulb pins 2 to provide power for the light-emitting element 5. One side of the power supply element 3 may be connected to the one or more bulb pins 2, and the other side of the power supply element 3 may be connected to the light-emitting element 5.

Referring to FIG. 1, in one embodiment, the bulb base 1 may include a base body 11 and an extension body 12. A first end of the base body 11 may be connected to the glass cover 6, and a second end of the base body 11 may be connected to the extension body 12. The base body 11 may include the second cavity, and is configured to accommodate the structure of the second cavity and connect to the opening end of the glass cover 6. The base body 11 may include a structure configured to fixate the power supply element 3, e.g., a slot structure for inserting a circuit board 32 of a power supply element 3, and/or a limiting structure for limiting the position of the power supply element 3 in the base body 11.

The extension body 12 may include one or more pin path, and each pin path matches a shape of each bulb pin 2. Each of the one or more bulb pins 2 can be inserted into each pin path. Each pin path can be regarded as an insertion path for a bulb pin 2. In some embodiments, the shape of each bulb pin 2 matches the shape of each pin path. That is, the shape of each pin path can facilitate the insertion and fixing of each bulb pin 2. The quantity of the pin paths may be same as the quantity of the pins. Neighboring pin paths can be separated by spacing structures. Insulating treatment can be performed in between the bulb pins 2.

The base body 11 and the extension body12 may integrally form a one-piece structure or may be assembled. Any proper material can be used for the base body 11 and the extension body 12. Optionally, because the one or more bulb pins 2 and the power supply element 3 are both circuit elements, the base body 11 and the extension body 12 may be composed by insulating materials. To further improve the heat dissipation, the base body 11 and the extension body 12 may be composed by materials with better heat dissipation performance.

The second cavity can accommodate the power supply element 3. In addition, the base body 11 and the extension body 12 of the bulb base 1 can accommodate and protect the power supply element 3 and each bulb pin 2 respectively. Moreover, the base body 11 and the extension body 12 ensure not only the stability of electrical and structural connection between the power supply element 3 and each bulb pin 2, but also the structural stability of the bulb pins 2 themselves. Such structural configurations can also prevent each bulb pin 2 and the power supply element 3 being affected by a plug-in operation.

In addition, the base body 11 may have a cylindrical shape, and the extension body 12 may have a flat shape. The cover glass 6 can also have a cylindrical shape that matches the base body 11.

In one embodiment, referring to FIG. 1, a power supply element 3 may include a circuit board 32 and a power supply circuit 31 disposed on the circuit board 32. The circuit board 32 may be disposed in a bulb base 1, and specifically may be disposed in a base body 11 of the bulb base 1. A first end of each bulb pin 2 may be fixedly connected to the circuit board 32, and electrically connected to the power supply circuit 31. Thus, both structural and electrical connections can be achieved.

The light-emitting element 5 may be fixedly connected to the circuit board 32 through the connection pin 4 and is electrically connected to the power supply circuit 31 so as to achieve structural connection and electrical connection at the same time.

Because the power supply element 3 according to embodiments of the present disclosure is independently disposed in the second cavity, it is necessary to achieve electrical transmission through connection pins 4 besides the light-emitting element 5 and the power supply element 3. In addition, the light-emitting element 5 is independently disposed in the first cavity, and two ends of each connection pin 4 are connected to the circuit board 32 and the light-emitting element 5, respectively. Thus, each of the connection pins 4 can also achieve structural support and connection. Compared to conventional technologies, in which each connection pin 4 only has a function of electrical connection and is disposed together with the light-emitting element 5 and the power supply element 3 on the same substrate/board, each connection pin 4 according to embodiments of the present disclosure may have more functions.

In one embodiment, a middle portion of each connection pin 4 is sealed at one end of the cover glass 6. According to this embodiment, it is possible to not only seal the first cavity, but also further improve structural support and connection effect of the connection pin 4 on the light-emitting element 5.

FIG. 2 is a circuit diagram of a power supply circuit according to some embodiments of the present disclosure; and FIG. 3 is a circuit diagram of a power supply circuit according to some other embodiments of the present disclosure.

In one embodiment, referring to FIG. 2 and FIG. 3, the power supply circuit 31 may include a rectifier element and a voltage regulation driving element. Input terminals of the rectifier element may be connected to the pins, and an output terminal of the rectifier element may be connected to the voltage regulation driving element. The rectifier element can be configured to rectify power provided by the external power supply U0 and provide the rectified power to the voltage regulation driving element. Referring to FIG. 2 and FIG. 3, the rectifier element may include a rectifier sub-circuit U1. A first terminal of the rectifier sub-circuit U1 may be connected in parallel with a first capacitor C1, while a second terminal of the rectifier sub-circuit U1 may be connected in parallel with a second capacitor C2 to regulate the voltage.

The voltage regulation driving element may be configured to use the supplied power to drive the light-emitting element 5 to emit light.

Referring to FIG. 2, the voltage regulation driving element may be a linear voltage regulator.

In some embodiments, the voltage regulation driving element may include a voltage-current conversion sub-circuit U2 and a first resistor R1. An output terminal of the voltage-current conversion sub-circuit U2 may be connected to a first terminal of the first resistor R1. An input terminal of the voltage-current conversion sub-circuit U2 may be connected to the rectifier element. A sampling terminal of the voltage-current conversion sub-circuit U2 may be connected to a second terminal of the first resistor R1, and the second terminal of the first resistor R1 is connected to the light-emitting element 5. The voltage-current conversion sub- circuit U2 can be configured to utilize the supplied power and output a constant current source. Voltage from the constant current source can be supplied to the light-emitting element 5 after being divided by the first resistor R1. In one embodiment, the voltage-current conversion sub-circuit U2 may include a controller and a switch device. An input terminal of the switch device is connected to the rectifier element. An output terminal of the switch device is connected to the first terminal of the first resistor R1. A control terminal of the switch device is connected to an output terminal of the controller, and a power supply terminal of the controller is connected to the rectifier element. An enabling terminal of the controller may be input with a high voltage, and the sampling terminal of the voltage-current conversion sub-circuit U2 may be connected to the second terminal of the first resistor R1. The sampling terminal of the voltage-current conversion sub-circuit U2 can be a signal input terminal of the first resistor. The second terminal of the first resistor R1 may also be connected to the light-emitting element 5. The controller can be configured to control the operation of the switch device based on the electrical signal collected by the sampling terminal.

Referring to FIG. 3, the voltage regulation driving element may be a switching regulator element.

In some embodiments, the voltage regulation driving element may include a voltage-current conversion sub-circuit U2, a first resistor R1, a first diode D1, a first inductor T1, and a third capacitor C3. The voltage-current conversion sub-circuit U2 can be configured to utilize the supplied power to output current, of which the mechanism is similar to the embodiment illustrated in FIG. 2, and therefore is not elaborated herein. In some embodiments, the voltage-current conversion sub-circuit U2 can output a low-voltage direct current through the first resistor R1, the first inductor T1, the first diode D1, and the third capacitor C3, so as to supply the direct current to the light-emitting element 5. An input terminal of the first diode D1 is connected to an output terminal of the light-emitting element 5. An output terminal of the first diode D1 is connected to the first terminal of the first resistor R1, i.e. the output terminal of the voltage-current conversion sub-circuit U2. A first terminal of the first inductor T1 is connected to the second terminal of the first resistor R1, i.e. connected to the sampling terminal of the voltage-current conversion sub-circuit U2. The third capacitor C3 is connected in parallel with two terminals of the light-emitting element 5. A first terminal of the third capacitor C3 is connected to the second terminal of the inductor T1. The second terminal of the third capacitor C3, the output terminal of the light-emitting element 5 and the input terminal of the first diode D1 are all grounded.

In some embodiments, the light-emitting element 5 may include a substrate and an LED chip disposed on the substrate. The LED chip may be electrically connected to the power supply element 3 through one or more connection pins 4. The one or more connection pins 4 may be fixedly connected to the substrate. Further, the substrate may be metal or non-metal. The light-emitting element 5 may include phosphor powder, which is coated on the surface of the LED chip. The phosphor powder can be coated on surface of individual LED chips separately, and can also be coated on surface of multiple LED chips.

In addition, in some embodiments, the quantity of the bulb pins 2 may be two, and the distance between the two bulb pins 2 may be 9 mm. Thus, the pin-based light bulb according to embodiments of the present disclosure can be applied to a G9 type light bulb and can also be applied to other types of pin-based light bulbs.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limiting the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that it is still possible to modify the technical solutions described in the foregoing embodiments or equivalently replace some or all of the technical features; and these modifications or replacements do not deviate the scope of the present disclosure.

Claims

A pin-based light bulb, comprising: a glass cover, a bulb base, a light-emitting element, at least one bulb pin, and a power supply element, wherein:

the glass cover includes a closed first cavity and the light-emitting element is disposed in the first cavity;

the bulb base is connected to one end of the glass cover and includes a second cavity, wherein the power supply element is disposed in the second cavity and fixedly connected to the bulb base;

a first end of the at least one bulb pin is connected to the power supply element, and a second end of the at least one bulb pin is configured to pass through the bulb base and be connected to an external power supply; and

the power supply element is configured to use the external power supply connected to the at least one bulb pin to provide power for the light-emitting element.
The pin-based light bulb according to claim 1, wherein:

the power supply element comprises a circuit board and a power supply circuit disposed on the circuit board;

the circuit board is disposed in the bulb base, and the first end of the at least one bulb pin is fixed to the circuit board and is electrically connected to the power supply circuit; and

the light-emitting element is fixedly connected to the circuit board through at least one connection pin and is electrically connected to the power supply circuit.
The pin-based light bulb of claim 2, wherein:

a middle portion of the at least one connection pin is melt-sealed with one end of the cover glass.
The pin-based light bulb according to claim 2, wherein:

the power supply circuit comprises a rectifier element and a voltage regulation driving element, an input terminal of the rectifier element is connected to the at least one bulb pin, and an output terminal of the rectifier element is connected the voltage regulation driving element;

the rectifier element is configured to rectify the external power supply and supply the rectified power supply to the voltage regulation driving element; and

the voltage regulation driving element is configured to use the supplied power to drive the light-emitting element to emit light.
The pin-based light bulb according to claim 4, wherein:

the voltage regulation driving element is a linear voltage regulator.
The light bulb according to claim 4, wherein:

the voltage regulation driving element comprises a voltage-current conversion sub-circuit and a first resistor; and

an output terminal of the voltage-current conversion sub-circuit is connected to a first terminal of the first resistor, an input terminal of the voltage-current conversion sub-circuit is connected to the rectifier element, a sampling terminal of the voltage-current conversion sub-circuit is connected to a second terminal of the first resistor, and the second terminal of the first resistor is connected to the light-emitting element.
The pin-based bulb of claim 4, wherein the voltage regulation driving element is a switching regulator.
The pin-based light bulb of claim 4, wherein:

the voltage regulation driving element comprises a voltage-current conversion sub-circuit, a first resistor, a first diode, a first inductor, and a third capacitor; and

an output terminal of the voltage-current conversion sub-circuit is connected to a first terminal of the first resistor,

an input terminal of the voltage-current conversion sub-circuit is connected to the rectifier element,

an output terminal of the first diode and the first terminal of the first resistor are connected to the output end of the voltage-current conversion sub-circuit,

a first terminal of the first inductor and a second terminal of the first resistor are connected to a sampling terminal of the voltage-current conversion sub-circuit,

a third capacitor is connected in parallel with both terminals of the light-emitting element,

a first terminal of the third capacitor is further connected to a second terminal of the first inductor, and

a second terminal of the third capacitor, the output terminal of the light-emitting element, and the input terminal of the first diode are grounded.
The pin-based light bulb according to claim 1, wherein:

the bulb base includes a base body and an extension body;

a first end of the base body is connected to the cover glass, a second end of the base body is connected to the extension body, and the second cavity body is disposed in the base body; and

at least one pin path that matches a shape of the at least one bulb pin is disposed in the extension body, and the least one bulb pin is inserted in the at least one pin path.
The pin-based light bulb of claim 9, wherein:

the base body has a cylindrical shape, the extension body has a flat shape, and the cover glass has a cylindrical shape that matches the base body.
The pin-based light bulb according to claim 1, wherein:

the light-emitting element includes a substrate and an LED chip disposed on the substrate;

the LED chip is electrically connected to the power supply element through at least one connection pin; and

the substrate is fixedly connected to the at least one connection pin.
The pin-based light bulb according to claim 11, wherein:

a surface of the LED chip is coated with phosphor powders.
The pin-based light bulb according to claim 1, wherein a quantity of the at least one bulb pin is two and a distance between the two bulb pins is 9 mm.
The pin-based light bulb according to claim 1, wherein the glass cover further includes a vent.