CN207112407U - Lighting device - Google Patents

Abstract

A lighting device comprises a light-transmitting shell, a base, a light bar module, a core column, a lamp holder and a driving piece. The light bar module is placed in the cavity. The light bar module is composed of a plurality of light bars, a plurality of light emitting diode chips are placed in each light bar, and two ends of each light bar are respectively provided with an electric connection end. The stem extends upwards from the base, and the stem is provided with the expansion portion in addition at the top, the electric connection end of the one end of a plurality of lamp strips is fixed to the expansion portion. The open end of the lamp holder is connected with the bottom of the light-transmitting shell. The driving part is arranged in the lamp cap and is electrically connected with the light bar modules, and the driving part provides electric power for the plurality of light bars to illuminate. The utility model discloses a lighting device reaches the even and big technological effect of luminous angle of light-emitting effect.

Description

lighting device

technical field

The utility model relates to a lighting device, in particular to a light emitting diode lighting device.

Background technique

The technology of light emitting diode (Light Emitting Diode, LED) has developed vigorously in recent years, which has made the lighting industry have undergone great changes in these years. More and more light-emitting diodes are used in lighting devices, especially in bulb lamps. However, because the secondary light can not emit light in all directions like black silk light, its light has strong directionality, and the existing bulb lighting devices that use light-emitting diodes as light sources often have uneven light output effects, which are easy to Partially dark spots at one end of the bulb envelope due to less light. In addition, it is precisely because of the strong directionality of light emitting diodes that light-emitting diodes are easily used as light sources for bulb lighting devices that often have too small a light angle and cannot meet people's lighting needs.

Therefore, how to design a light-emitting diode lighting device with a uniform light-emitting effect and a large light-emitting angle is a technical problem that needs to be solved urgently.

Utility model content

According to the first embodiment of the present invention, a lighting device is provided, which has a light-transmitting shell, a base, a light bar module, a stem, a lamp holder and a driving part. The base is connected with the light-transmitting shell to form a cavity, and the base has a closed air inlet. It also includes an inert gas, which enters the cavity through the gas inlet during manufacture and remains in the cavity after the gas inlet is closed. On the one hand, these inert gases can prevent the oxidation of metal components in the cavity, and on the other hand, they can assist the light strip module to dissipate heat.

The light bar module is placed in the cavity. The light strip module is composed of a plurality of light strips, each light strip is placed with a plurality of light emitting diode chips, and each light strip has electrical connection terminals at both ends. The main light emitting direction of each light bar in the plurality of light bars is not completely the same. For example, some light bars make the main light emitting directions of these light bars face different directions by setting different installation angles. Usually, the light-emitting angle of the light-emitting diode chip is about 120 degrees, and within this angle range is the area where the main brightness is concentrated. If a transparent substrate such as a glass substrate is used, even the back side has a main light-emitting area of 120 degrees. By adjusting the orientation of the main light-emitting directions of these light bars, the dark areas with relatively dark light in the light-transmitting housing can be reduced.

For example, if the light-transmitting shell itself is non-transparent, such as a matte surface, the dark area may make the overall light effect of the bulb unable to achieve the desired effect.

Additionally, a stem extends upwardly from said base. The stem is further provided with an expansion part at the top, and the electrical connection end of one end of the plurality of light bars is fixed to the expansion part. The open end of the lamp cap is connected with the bottom of the transparent shell.

The driver is placed in the lamp holder and is electrically connected to the light bar module to provide the electric power required by the plurality of light bars for lighting.

In one embodiment, the stem has a metal part, which includes that the entire stem is made of metal, and also includes that part of the material is metal, and part of the material is made of non-metal. For example, the body of the stem can be made of glass material, and metal wires, metal sheets, etc. are embedded in it. The electrical connection end at one end of the light bar can be electrically connected through the metal part of the stem. One way is that all the electrical connection terminals at one end of the light bar are electrically connected together through the metal part of the core column at the same time. Another way is that some light bars are indirectly fixed to the stem through insulating objects, such as non-conductive glue or non-conductive spacers. Or there are multiple isolated metal parts on the stem, and these multiple light bars are divided into two or more groups, and each group is electrically connected through the metal part of the stem, but at the same time, different groups of light bars are not connected to each other through the chip Make direct electrical connection to the metal parts.

In another embodiment, the stem is made of glass. The expansion part and the stem are made of different materials, for example, the expansion part is a metal conductive material, and the expansion part is installed on the top of the stem to provide a peripheral structure that is horizontally expanded larger than the diameter of the stem. In other words, if the stem is a cylindrical or polygonal body, its horizontal section will have a horizontal cross-sectional area of the stem. On the other hand, the direction in which the expansion part is parallel to the horizontal section has a horizontal cross-sectional area of the expansion part, and the horizontal cross-sectional area of the expansion part is larger than the horizontal cross-sectional area of the stem. The expansion part can be sleeved on the top of the stem in a manner similar to wearing a hat, or fixed on the top of the stem or a relatively upper position by other structures. For example, using a collar to cover the top of the stem or a groove above it can also be assisted by gluing to strengthen the fixation or to dissipate heat.

In addition, a conductive channel may be provided inside the expansion part for connecting the electrical connection end of one end of the plurality of light bars, and leading the current to the driving element.

The core column and the expansion part can be made of the same material or different materials, and different designs can be made according to different design requirements.

In another embodiment, the stem is made of metal, and similar to the description above, the expanded portion at the top of the stem has a larger horizontal cross-sectional area than the stem. In addition, the expansion part is formed by bending the stem at the top, and constitutes a peripheral structure extending horizontally larger than the diameter of the stem.

Moreover, in one embodiment, the electrical connection ends of the plurality of light bars may be electrically connected to the expansion part. In one embodiment, the core post is a metal strip, and the metal strip is bent at the top to form a horizontal circular structure as the expansion part.

In another embodiment, the core post may be a metal strip, and the metal strip is bent at the top to form a horizontal polygonal structure as the expansion part.

Of course, the metal strips can also be wound into planar or three-dimensional expansion parts of various shapes, which are used to connect one end of the plurality of light strips.

In one embodiment, the base is made of glass. The bottom of the stem is embedded into the base, and through the tight combination of the stem and the base, the heat generated when the plurality of light bars emit light is effectively transferred to the base, and further transferred to the base. The light-transmitting shell, the light-transmitting shell has a large heat dissipation area, and can dissipate heat well to the outside world. For example, a glass base can be softened or melted by heating in order to embed the bottom of the stem into the base. Another method is to directly place the stem and related wires in a high-heat-resistant mold, and pour molten glass so that the cooled base directly covers the stem.

According to another embodiment, the lighting device may further include a plurality of extensions extending outward from the base, and the electrical connection ends of the other ends of the plurality of light bars are respectively electrically connected to one of the extensions.

The electrical connection at one end or the other end of the light bar mentioned here refers to a section of conductor that can be used to electrically connect in series with external circuit components or power lines to guide the appropriate current to the light bar. A light emitting diode chip, such that the light emitting diode chip emits light. The electrical connection end of each light bar can be set independently, and can also be directly integrally formed with the electrical connection end of another light bar. In other words, in the latter case, if the two light bars are to be connected in series, no additional soldering operation is required, because at least one end of the two light bars has already been connected in series.

According to an embodiment, one end of the plurality of light bars forms a top polygon, and the other end of the plurality of light bars forms a bottom polygon, and the area of the top polygon is smaller than the area of the bottom polygon. In other words, one end of the plurality of light bars has a relatively small polygon, and the other end of the light bars has a relatively large polygon, and the two form a polygonal cone (cone) with a lower width and a slightly narrower top. This setting can get a relatively ideal light source output route.

Furthermore, according to another embodiment, the top polygon is substantially similar in shape to the bottom polygon but offset by a predetermined angle. As mentioned above, these light bars usually have different light-emitting directions. If these light bars are arranged directly perpendicular to the surface of the light-transmitting shell, some areas are likely to be particularly bright, while some areas are relatively dark, thus generating light spots. Moreover, such a problem is particularly obvious when the light-transmitting shell is not completely transparent, such as milky white. It is found through experiments that if the top polygon and the bottom polygon of multiple light bars are staggered by an angle, a more ideal light output effect can be output, for example, the appearance of light spots can be avoided. In addition, ideally, the staggered angle can be greater than 10 degrees and less than 80 degrees.

As mentioned above, for the problem of light spots, the main irradiation directions of the plurality of light bars can be adjusted until no regular light spots appear on the light-transmitting shell. Since the shape and size of the light-transmitting shell are not fixed for each lamp, the length of the light bar may not be the same as the beam angle. Therefore, the best staggered angle can be achieved by painting white paint on the light-transmitting shell and adjusting the light beam through experiments. The main light emitting directions of the plurality of light strips are used to reduce dark areas formed by relatively little light on the bulb shell.

In another embodiment, the stem may directly or indirectly facilitate the electrical connection. In the application of light-emitting diode chips, there will be two power input terminals, positive and negative. Therefore, the stem in this embodiment can provide a first electrode contact, such as a power input terminal of a positive pole or a negative pole. On the other hand, the plurality of extensions can provide a second electrode contact, that is, another power input end in a direction different from that of the stem. Through the stem, the extension piece, and the related wiring circuit, the power required for the lighting of the plurality of light bars can be supplied.

In some embodiments, these light bars form a series-parallel relationship. Of course, in the description here, in addition to the first group of light bars, there can also be a second group of light bars, and different designs can be made according to different design needs. For example, for light strips in different directions, multiple groups of different light strips can be set, each having relatively different parameters and providing different lighting parameters, so that the entire lighting device can produce the most ideal and effective lighting effects.

In addition, if the angle of the light bar can be further uniformed, that is, not only emitting light toward certain specific angles, the light output effect of the entire lighting device will be more ideal. At the same time, this setting can also make the lighting The lighting angle of the device is greatly increased. One way of doing this is to allow the light strips to be configured in a more three-dimensional way. As in the aforementioned embodiments, the cross-sectional area of the bottom of the light-transmitting cover usually needs to match the size of the lamp head. On the other hand, if the light strip module is to be placed in the light-transmitting cover, it is often limited by the bottom cross-sectional area of the light-transmitting cover, otherwise it is not easy to put it into the light-transmitting cover.

Therefore, in one embodiment, we can add a certain degree of elasticity to the extension of the base, such as shrapnel or springs, so that when the light bar module and the base are put into the light-transmitting case from the bottom of the light-transmitting case, it can The bottom of the light bar module is compressed to a certain extent, and after the light bar module is put into the light transmission, the bottom of the light bar module is expanded.

Through this design method, the area of the polygon formed by the bottom of the light bar module can be larger than the entrance area of the lamp head. Moreover, this design method can make the illumination angle of the entire light bar module more three-dimensional, and can also bring better light output effects.

In addition, even with the same number of light-emitting diode chips, if a relatively long light bar can be used, the effect of light uniformity can be further increased. In one embodiment, the height of the plurality of light bars along the axial direction of the lamp head accounts for more than 50% of the height of the transparent housing along the axial direction of the lamp head, which can produce better lighting effects.

In addition, there are often dark areas on top of lighting fixtures such as light bulbs that are not bright enough. In order to solve this problem, more dense LED chips can be placed in the area of the light bar near the top of the light-transmitting cover, that is, compared to the area of the light bar away from the bottom of the light-transmitting cover. Alternatively, one or more light sources can be mounted on the extension. For example, the expansion part can be made into a module, in which a substrate is installed with light-emitting diode chips, and optical elements such as a diffuser plate that can process light more uniformly. By installing a light source on the expansion part, the luminous brightness toward the top of the light-transmitting shell can be enhanced.

In addition, in some embodiments, reflective surfaces corresponding to the plurality of light bars may be further provided on the stem to reflect light irradiated from the plurality of light bars to the stem. In the design of the lighting device, directing the light to the desired area can not only improve the optical effect more effectively, but also avoid unnecessary hot spot concentration, which will cause the components to age easily.

As mentioned above, the entire light bar module is mainly arranged above the base. In order to supply power, a driver under the base is also required to generate the required current. For the convenience of assembly, two connection wires can be led out from the bottom of the base, and on the other hand, two corresponding electrical connection terminals can be provided on the top of the driver, such as the driver circuit board. During the assembly process, the two electrical connection wires can be inserted into the two electrical connection terminals correspondingly, so that the time and cost of welding can be saved. In another embodiment, the base can be provided with protruding electrical connection terminals, and the driver can be provided with interfaces, and another different design can also be provided.

In addition, in order to provide heat dissipation, heat sinks of various shapes and sizes can also be arranged on the base and connected to the stem. These heat sinks can be further connected to other heat sinks, such as the drive element or the heat sink inside the lamp cap, or connected to the light-transmitting shell, so as to enhance the heat dissipation effect. These should all be considered as belonging to the scope of the present utility model.

According to another embodiment of the present invention, a method for manufacturing a lighting device is provided, including the following steps.

First, provide the base. For example, mold the shape of other materials such as glass material or plastic material with moulds.

A stem is arranged on the base, and an expansion part is arranged on the top of the stem. The stem can be made of glass as the base. Alternatively, the stem can be made of different materials from the base, for example, the stem is a metal rod, metal strip, iron-nickel wire, etc., while the base is glass.

A plurality of light bars are mounted to the stem, wherein electrical connection terminals at one end of the plurality of light bars are fixed to the expansion portion. In other words, one end of more than two light bars is connected to the diffuser. However, this does not mean that a lighting fixture can only have one set of light bars. In other words, not all light bars must have one end connected to the expansion part.

A plurality of extension pieces are provided at the other end of the plurality of light bars, and the extension pieces extend outward from the base. These extensions may be metal rods, metal strips, iron-nickel wires and other materials. These extensions can be embedded into the base using various techniques. Of course, the base mentioned here also includes the bottom of the stem.

The other ends of the plurality of light bars are respectively fixed to the plurality of extension pieces. One of the simplest connections is that the first electrical connection on one end of all light strips goes to the positive pole, and the second electrical connection on the other end of all the light strips goes to the negative pole. In other words, all light bars are powered in parallel. Of course, the present invention is not limited to this connection method, and other electrical connection methods are also possible.

The light-transmitting case is installed so that the bottom of the light-transmitting case is connected to the base to form a cavity. Inert gas is filled into the cavity from the gas inlet of the base. Moreover, after the inflation is completed, the air inlet can be sintered to form a closed cavity, so that the inert gas can remain in the cavity.

The beneficial effects of the utility model are: through the above technical proposal, the lighting device adopting the light emitting diode as the bulb lamp can achieve the technical effect of uniform light emitting effect and large light emitting angle.

Description of drawings

Fig. 1 demonstrates an embodiment of a lighting device.

FIG. 2 is an enlarged view of some components in FIG. 1 .

FIG. 3 is an exploded view of components of an exemplary lighting device embodiment.

Fig. 4 is a schematic diagram of another embodiment of an exemplary lighting device.

FIG. 5 is a schematic diagram illustrating a configuration of a light bar.

FIG. 6 is another schematic diagram illustrating the configuration of the light bar.

Fig. 7 demonstrates a flowchart of a method for assembling a lighting device.

FIG. 8 is a schematic diagram illustrating an electrical connection and fixing method of a light bar.

FIG. 9 illustrates a schematic diagram of an electrical connection manner between light bars.

FIG. 10 is a schematic diagram illustrating another electrical connection method between light bars.

FIG. 11 is a schematic diagram illustrating another electrical connection method between light bars.

Detailed ways

Please refer to FIG. 1 to FIG. 3 to demonstrate an embodiment of the lighting device according to the present invention. Fig. 1 demonstrates an embodiment of a lighting device. FIG. 2 is an enlarged view of some components in FIG. 1 . FIG. 3 is an exploded view of components of an exemplary lighting device embodiment.

This illuminating device has a light-transmitting shell 11 , a base 14 , a light bar module 13 , a stem 12 , a lamp holder 15 and a driver 16 . The base 14 is connected with the transparent shell 11 to form a cavity, and the base 14 has a closed air inlet. It also includes an inert gas, which enters the cavity through the gas inlet during manufacture and remains in the cavity after the gas inlet is closed. On the one hand, these inert gases can prevent the oxidation of metal components in the cavity, and on the other hand, they can assist in heat dissipation.

The light bar module 13 is placed in the cavity. The light strip module 13 is composed of a plurality of light strips, each light strip is placed with a plurality of light emitting diode chips, and two ends of each light strip have electrical connection terminals respectively. The main light emitting direction of each light bar in the plurality of light bars is not completely the same. Generally, the light-emitting angle of the light-emitting diode chip is about 120 degrees, and within this angle range is the area where the main brightness is relatively concentrated. If a transparent substrate such as a glass substrate is used, even the back side has a main light-emitting area of 120 degrees.

Referring to FIGS. 2 and 3 , the stem 12 extends upward from the base 14 . The stem 12 is further provided with an expansion part 121 at the top, and the electrical connection end of one end of the plurality of light bars is fixed to the expansion part 121 . The open end of the lamp holder 15 is connected to the bottom of the transparent shell 11 . In order to insulate most of the electronic components in the driver 16 from the lamp cap 15, an insulating cup 17 can also be placed, and the driver 16 is placed in the insulating cup 17 during assembly.

The insulating cup 17 is placed in the lamp holder 15, and the driver 16 is electrically connected to the light bar module 13 to provide the electric power required by the multiple light bars for lighting.

In one embodiment, the stem 12 is made of glass. The expanded part 121 and the stem 12 are made of different materials, for example, the expanded part 121 is made of a metal conductive material, and the expanded part 121 is installed on the top of the stem 12 to provide a peripheral structure horizontally expanded larger than the diameter of the stem. In other words, if the stem 12 is a cylinder or a polygon, its horizontal section will have a horizontal cross-sectional area of the stem. On the other hand, the direction parallel to the horizontal cross-section of the expansion part 121 has a horizontal cross-sectional area of the expansion part, and the horizontal cross-sectional area of the expansion part is larger than the horizontal cross-sectional area of the stem. The expansion part 121 can be sleeved on the top of the stem 12 in a manner similar to wearing a hat, or fixed on the top or relatively upper part of the stem 12 by other structures. For example, using a collar to cover the top of the stem or a groove above it can also be assisted by gluing to strengthen the fixation or to dissipate heat.

In addition, a conductive channel may be provided inside the expansion part 12 for connecting the electrical connection end of one end of the plurality of light bars, and leading the current to the driving member 16 .

The stem 12 and the expansion part 121 can be made of the same material or different materials, and can be designed in different variations according to different design requirements.

In another embodiment, the stem 12 is made of metal. Similar to the description above, the expanded portion 121 at the top of the stem 12 has a larger horizontal cross-sectional area than the stem 12 . In addition, the expansion part 121 is formed by bending the stem 12 at the top, and forms a peripheral structure that expands horizontally larger than the diameter of the stem.

Moreover, in one embodiment, the electrical connection terminals of the plurality of light bars can be electrically connected to the expansion part 121 . In one embodiment, the stem 12 is a metal strip, and the metal strip is bent at the top to form a horizontal circular structure as the expansion part 121 .

In addition, in FIG. 1, the height 1502 of the plurality of light bars along the axial direction of the lamp head can be set to be greater than 50% of the height 1501 of the transparent housing along the axial direction of the lamp head, so that the overall The luminous effect is more ideal.

Please refer to FIG. 4 . FIG. 4 demonstrates another embodiment of the expansion part. The stem 42 can be a metal strip, and the metal strip is bent at the top to form a horizontal polygonal structure 41 as the expansion part.

Of course, the metal strips can also be wound into planar or three-dimensional expansion parts of various shapes, which are used to connect one end of the plurality of light strips.

In one embodiment, the base is made of glass. The bottom of the stem is embedded into the base, and through the tight combination of the stem and the base, the heat generated when the plurality of light bars emit light is effectively transferred to the base, and further transferred to the base. The light-transmitting shell, the light-transmitting shell has a large heat dissipation area, and can dissipate heat well to the outside world. For example, a glass base can be softened or melted by heating in order to embed the bottom of the stem into the base. Another method is to directly place the stem and related wires in a high-heat-resistant mold, and pour molten glass so that the cooled base directly covers the stem.

Please refer to Figure 2. According to another embodiment, the lighting device may further include a plurality of extensions 122 extending outward from the base 14, and the electrical connection ends of the other ends of the plurality of light bars are respectively electrically connected to one of the extensions. piece 122.

The electrical connection at one end or the other end of the light bar mentioned here refers to a section of conductor that can be used to electrically connect in series with external circuit components or power lines to guide the appropriate current to the light bar. A light emitting diode chip, such that the light emitting diode chip emits light. The electrical connection end of each light bar can be set independently, and can also be directly integrally formed with the electrical connection end of another light bar. In other words, in the latter case, if the two light bars are to be connected in series, no additional soldering operation is required, because at least one end of the two light bars has already been connected in series.

Please refer to FIG. 5 , which demonstrates the relative relationship between the top polygon formed by one end of the light bar and the bottom polygon formed by the other end of the light bar. According to one embodiment, the tops of the plurality of light bars 611, 612, 613, 614, 615 form a top polygon 601, and the bottoms of the plurality of light bars 611, 612, 613, 614, 615 form a bottom polygon 602. , and the area of the top polygon 601 is smaller than the area of the bottom polygon 602 . In other words, in this example, there is a relatively small polygon at one end of the multiple light bars, and a relatively large polygon at the other end of the light bars. The two form a variable cone with a lower width and a slightly narrower top. (cone). This setting can get a relatively ideal light source output route.

Furthermore, according to another embodiment, the top polygon is substantially similar in shape to the bottom polygon but offset by a predetermined angle. As shown in Figure 6, the light bars 611, 612, 613, 614, and 615 usually have different light-emitting orientations. If these light bars are arranged directly perpendicular to the surface of the light-transmitting shell, some areas are likely to be particularly bright, while Some areas are relatively dark, resulting in light spots. Moreover, such a problem is particularly obvious when the light-transmitting shell is not completely transparent, for example, when it is milky white. It is found through experiments that if the top polygon 603 and the bottom polygon 602 of multiple light bars are staggered by an angle 605 , for example, a more ideal light effect can be output, for example, the appearance of dark areas can be avoided. In addition, ideally, the staggered angle can be greater than 10 degrees and less than 80 degrees.

As mentioned above, for the problem of light spots, the main irradiation directions of the plurality of light bars can be adjusted until no regular light spots appear on the light-transmitting shell. Since the shape and size of the light-transmitting shell are not fixed for each lamp, the length of the light bar may not be the same as the beam angle. Therefore, the best staggered angle can be achieved by painting white paint on the light-transmitting shell and adjusting the light beam through experiments. The main light emitting directions of the plurality of light strips are used to reduce dark areas formed by relatively little light on the bulb shell.

In another embodiment, the stem may directly or indirectly facilitate the electrical connection. In the application of light-emitting diode chips, there will be two power input terminals, positive and negative. Therefore, the stem in this embodiment can provide a first electrode contact, such as a power input terminal of a positive pole or a negative pole. On the other hand, the plurality of extensions can provide a second electrode contact, that is, another power input end in a direction different from that of the stem. Through the stem, the extension piece, and the related wiring circuit, the power required for the lighting of the plurality of light bars can be supplied.

In some embodiments, these light bars form a series-parallel relationship. Of course, in the description here, in addition to the first group of light bars, there can also be a second group of light bars, and different designs can be made according to different design needs. For example, for light strips in different directions, multiple groups of different light strips can be set, each having relatively different parameters and providing different lighting parameters, so that the entire lighting device can produce the most ideal and effective lighting effects.

In addition, if the angle of the light bar can be further uniformed, that is, not only emitting light toward certain specific angles, the light output effect of the entire lighting device will be more ideal. At the same time, this setting can also make the lighting The lighting angle of the device is greatly increased. One way of doing this is to allow the light strips to be configured in a more three-dimensional way. As in the aforementioned embodiments, the cross-sectional area of the bottom of the light-transmitting cover usually needs to match the size of the lamp head. On the other hand, if the light strip module is to be placed in the light-transmitting cover, it is often limited by the bottom cross-sectional area of the light-transmitting cover, otherwise it is not easy to put it into the light-transmitting cover.

Therefore, in one embodiment, we can add a certain degree of elasticity to the extension of the base, such as shrapnel or springs, so that when the light bar module and the base are put into the light-transmitting case from the bottom of the light-transmitting case, it can The bottom of the light bar module is compressed to a certain extent, and after the light bar module is put into the light transmission, the bottom of the light bar module is expanded.

Through this design method, the area of the polygon formed by the bottom of the light bar module can be larger than the entrance area of the lamp head. Moreover, this design method can make the illumination angle of the entire light bar module more three-dimensional, and can also bring better light output effects.

In addition, even with the same number of light-emitting diode chips, if a relatively long light bar can be used, the effect of light uniformity can be further increased. In one embodiment, the height of the plurality of light bars along the axial direction of the lamp head accounts for more than 50% of the height of the transparent housing along the axial direction of the lamp head, which can produce better lighting effects.

In addition, there are often dark areas on top of lighting fixtures such as light bulbs that are not bright enough. In order to solve this problem, more dense LED chips can be placed in the area of the light bar near the top of the light-transmitting cover, that is, compared to the area of the light bar away from the bottom of the light-transmitting cover. Alternatively, one or more light sources can be mounted on the extension. For example, the expansion part can be made into a module, in which a substrate is installed with light-emitting diode chips, and optical elements such as a diffuser plate that can process light more uniformly. By installing a light source on the expansion part, the luminous brightness toward the top of the light-transmitting shell can be enhanced.

In addition, in some embodiments, reflective surfaces corresponding to the plurality of light bars may be further provided on the stem to reflect light irradiated from the plurality of light bars to the stem. In the design of the lighting device, directing the light to the desired area can not only improve the optical effect more effectively, but also avoid unnecessary hot spot concentration, which will cause the components to age easily.

As mentioned above, the entire light bar module is mainly arranged above the base. In order to supply power, a driver under the base is also required to generate the required current. For the convenience of assembly, two connection wires can be led out from the bottom of the base, and on the other hand, two corresponding electrical connection terminals can be provided on the top of the driver, such as the driver circuit board. During the assembly process, the two electrical connection wires can be inserted into the two electrical connection terminals correspondingly, so that the time and cost of welding can be saved. In another embodiment, the base can be provided with protruding electrical connection terminals, and the driver can be provided with interfaces, and another different design can also be provided.

In addition, in order to provide heat dissipation, heat sinks of various shapes and sizes can also be arranged on the base and connected to the stem. These heat sinks can be further connected to other heat sinks, such as the drive element or the heat sink inside the lamp cap, or connected to the light-transmitting shell, so as to enhance the heat dissipation effect. These should all be considered as belonging to the scope of the present utility model.

According to another embodiment of the present invention, a method for manufacturing a lighting device is provided, including the following steps.

First, a base is provided (step 701). For example, mold the shape of other materials such as glass material or plastic material with moulds.

A stem is arranged on the base, and an expansion part is arranged on the top of the stem. The stem can be made of glass as the base. Alternatively, the stem can be made of different materials from the base, for example, the stem is a metal rod, metal strip, iron-nickel wire, etc., while the base is glass.

Mounting a plurality of light bars to the stem (step 702 ), wherein electrical connection terminals at one end of the plurality of light bars are fixed to the expansion portion. In other words, one end of more than two light bars is connected to the diffuser. However, this does not mean that a lighting fixture can only have one set of light bars. In other words, not all light bars must have one end connected to the expansion part.

A plurality of extension pieces are provided on the other end of the plurality of light bars (step 703 ), and the extension pieces extend outward from the base. These extensions may be metal rods, metal strips, iron-nickel wires and other materials. These extensions can be embedded into the base using various techniques. Of course, the base mentioned here also includes the bottom of the stem.

Fix the other electrical connection ends of the plurality of light bars to the plurality of extension pieces respectively (step 704 ). One of the simplest connections is that the first electrical connection on one end of all light strips goes to the positive pole, and the second electrical connection on the other end of all the light strips goes to the negative pole. In other words, all light bars are powered in parallel. Of course, the present invention is not limited to this connection method, and other electrical connection methods are also possible.

The light-transmitting case is installed so that the bottom of the light-transmitting case is connected to the base to form a cavity. Inert gas is filled into the cavity from the gas inlet of the base. Moreover, after the inflation is completed, the air inlet can be sintered to form a closed cavity, so that the inert gas can remain in the cavity.

Next please refer to FIG. 8 , FIG. 9 , FIG. 10 and FIG. 11 . FIG. 8 is a schematic diagram illustrating an electrical connection and fixing method of a light bar. FIG. 9 illustrates a schematic diagram of an electrical connection manner between light bars. FIG. 10 is a schematic diagram illustrating another electrical connection method between light bars. FIG. 11 is a schematic diagram illustrating another electrical connection method between light bars.

First, in FIG. 8 , the top of the light bars 801 , 802 , 803 , 804 are fixed to the top of the stem 81 . In this example, one end of the light bars 801 , 802 , 803 and 804 are electrically connected through the metal part above the chip. Therefore, the stem can further connect this electrical connection point to the driving circuit of the lamp head through the metal part of the stem itself, or through an additional metal wire.

Fig. 9 is a logical schematic diagram. In Fig. 9, the stem 91 is used to connect to the wire or guide plate (not shown in the figure) of the lamp head driving circuit, and is responsible for electrically connecting with one end of the light bars 901, 902, 903 and 904, and then electrically connecting this contact to the power supply , to form an electrical circuit.

Fig. 10 is another electrical connection and fixing method of the light bar. One end of the light bars 1901, 1902, 1903 and 1904 is fixed to the upper end of the stem. However, unlike FIG. 9 , in FIG. 10 , light bars 1901 , 1902 form one set, while light bars 1903 , 1904 form another set. An insulating material 193 is set at the fixedly connected place above the stem so that although the two groups of light bars are fixed on the stem, they do not directly form an electrical connection. The core post electrically connects the two groups of light bars to the other electrical terminal of the driving circuit through two wires 191 and 192 to form an electrical circuit.

Fig. 11 is another electrical connection and fixing method of the light bar. In this example, the stem can be all metal or mostly no metal. There are more than two metal parts 195 , 197 connected by an insulating material 196 on the top of the stem, which are respectively used to electrically connect the first group of light bars 2901 , 2902 and the second group of light bars 2903 , 2904 . Moreover, the light bar 2902 and the light bar 2903 are electrically connected at the bottom. In other words, this connection constitutes a series connection.

Although the above example uses four light bars as an example, it can be extended to other numbers of light bars, and other more parallel or series or series-parallel ways. These different settings should still be considered to fall within the protection scope of the present utility model.

In addition to the above-mentioned embodiments, there can also be various deformations. As long as they are under the same spirit of the utility model, under such disclosure, various designs that can be produced by those familiar with the technical field should all belong to the utility model. new type of range.

Claims (14)

1. A lighting device, characterized in that it comprises: Light-transmitting shell; The base is connected with the light-transmitting shell to form a cavity, and the base has a closed air inlet; an inert gas that enters the cavity through the gas inlet during manufacture and remains in the cavity after the gas inlet is closed; The light bar module is placed in the cavity, the light bar module is composed of a plurality of light bars, each light bar is placed with a plurality of light-emitting diode chips, and the two ends of each light bar have electrical connection terminals respectively; a stem extending upward from the base, and the stem is further provided with an expansion part at the top, and the electrical connection ends at one end of the plurality of light bars are fixed to the expansion part; a lamp holder, the open end of the lamp holder is connected to the bottom of the light-transmitting shell; and The driver is placed in the lamp holder and is in electrical connection with the light bar module to provide the electric power required by the plurality of light bars for lighting. 2. The illuminating device according to claim 1, wherein the stem comprises a metal part, and the expansion part is formed by bending the stem at the top, and forms a horizontal expansion larger than the diameter of the stem. peripheral structure. 3. The lighting device according to claim 2, wherein the electrical connection ends of the plurality of light bars are electrically connected to the metal part of the expansion part to achieve electrical connection between the plurality of light bars. connect. 4. The lighting device according to claim 2, wherein the stem is a metal strip, and the metal strip is bent at the top to form a horizontal circular structure or a horizontal polygonal structure as the expansion part . 5. The lighting device according to claim 2, wherein the base is made of glass, the stem is embedded in the base, and the plurality of stems are tightly combined with the base to The heat generated when the light bar emits light is effectively transferred to the base, and further transferred to the light-transmitting shell. 6. The lighting device according to claim 1, further comprising a plurality of extensions extending outward from the base, and the electrical connection ends of the other ends of the plurality of light bars are respectively electrically connected to one the extension. 7. The lighting device according to claim 6, wherein one end of the plurality of light bars forms a top polygon, the other end of the plurality of light bars forms a bottom polygon, and the area of the top polygon is less than The area of the bottom polygon. 8. The lighting device according to claim 7, wherein the top polygon and the bottom polygon are substantially similar in shape and substantially parallel to each other, and in the direction in which the top polygon projects toward the bottom polygon, the top polygon and the bottom polygon The polygons are offset from each other by a predetermined angle. 9 . The lighting device according to claim 6 , wherein the main light emitting directions of the plurality of light bars are adjusted to reduce the dark area formed by relatively little light on the bulb shell. 10 . 10. The lighting device according to claim 6, wherein the stem provides a first electrode contact, and the plurality of extensions provide a second electrode contact to supply the lighting requirements of the plurality of light bars. electricity. 11. The lighting device according to claim 6, wherein the plurality of light bars form a series-parallel relationship. 12 . The lighting device according to claim 6 , wherein the extension member is elastic, and the area of the polygon formed by the other ends of the plurality of light bars is larger than the area of the open end of the lamp head. 13 . 13 . The lighting device according to claim 1 , wherein the height of the plurality of light bars along the axial direction of the lamp cap accounts for more than 50% of the height of the transparent housing along the axial direction of the lamp cap. 14 . 14. The lighting device according to claim 1, wherein the base has two electrical connecting wires, and the driving member further includes two electrical connecting terminals, and the two electrical connecting wires are correspondingly inserted into the The two electrical connection terminals are further connected to the plurality of light bars to provide electric power required by the plurality of light bars for lighting.