TWI705216B - Illumination apparatus - Google Patents

Abstract

An illumination apparatus including a housing, a light emitting element and an optical element is provided. The housing has an accommodation space. The housing includes a plurality of first matching sets on the inner wall of the housing. The light emitting element is disposed in the housing and located in the accommodating space. The optical element includes a second matching set at the outer edge of the optical element. The second matching set is adapted to be respectively matched to the first matching sets, wherein the optical element is selectively matched to one of the first matching sets and is adapted to be moved from one of the first matching sets to the other one parallel to a transmission direction of the light emitted by the illuminating element to change the focal length of the illumination apparatus.

Description

Lighting device

The present invention relates to an optical device, and particularly relates to a lighting device.

In the current traffic system, lighting devices, such as traffic lights, are often used to indicate traffic instructions. Generally speaking, traffic lights are classified into two designs: round lights and image lights. Nowadays, because the light type design of traffic lights needs to meet the requirements defined by laws and regulations, the optical design of the round lights needs to meet the light intensity distribution, and the optical design of the image light needs to meet the light intensity distribution and the luminaire. Requirements for uniformity of luminous surface brightness. However, if it is necessary to achieve optical conditions that comply with regulations, the optical architecture must be changed to adjust the light intensity distribution. Therefore, how to design a traffic lamp design with zoom function, without changing the optical element structure, use the zoom effect to effectively achieve the best matching design of light intensity distribution and surface brightness uniformity, and under different zoom effects It can meet the light intensity distribution and the uniformity of the surface brightness separately, so that the lamp structure has the common characteristics, which is the common goal of those in the art.

The present invention provides an illuminating device that can adjust the focal length by simple means to illuminate the light intensity distribution in compliance with traffic laws and regulations.

The invention provides a lighting device, which includes a housing, a light-emitting element and an optical element. The shell has an accommodation space. The housing includes a plurality of first matching groups, which are located on the inner wall of the housing. The light-emitting element is arranged in the casing and located in the accommodating space. The optical element includes a second matching group located at the outer edge of the optical element and adapted to be matched to the first matching group of the housing respectively, wherein the optical element can be selectively matched to one of the first matching groups and is suitable for Parallel to the transmission direction of the light emitted by the light-emitting element, one of the first matching groups of the housing is moved to the other one of the first matching groups to change the focal length of the lighting device.

In an embodiment of the present invention, the distances between the first matching groups and the light-emitting elements are different.

In an embodiment of the present invention, the second matching group of the aforementioned optical element has an external thread structure, and each first matching group of the housing has an internal thread structure.

In an embodiment of the present invention, the internal thread structures of the first matching group are arranged continuously and adjacently.

In an embodiment of the present invention, each of the first matching groups of the above-mentioned housing has a plurality of engaging portions, and the second matching group of the optical element has a plurality of engaging grooves, which are perpendicular to the one where the optical element is located. In the direction of the plane, a part of the engaging parts of the first matching group and another part of the engaging parts of the first matching group do not overlap each other.

In an embodiment of the present invention, the arrangement pitch of a part of the engaging grooves described above is the same as the arrangement pitch of the engaging grooves in another part of the first matching group.

In an embodiment of the present invention, the above-mentioned lighting device further includes a protective cover disposed on the housing to cover the accommodating space.

In an embodiment of the present invention, the aforementioned protective cover includes optical diffusion particles.

In an embodiment of the present invention, the above-mentioned optical element includes optical diffusion particles.

In an embodiment of the present invention, the above-mentioned optical element is a Fresnel lens.

Based on the above, the housing of the lighting device of the present invention has a plurality of first matching groups, the optical element has a second matching group, and the second matching group is adapted to match the first matching groups respectively. Therefore, the distance between the optical element and the light-emitting element can be changed by moving the optical element from one of the first matching group of the housing to the other of the first matching group. In this way, the focal length of the lighting device can be adjusted by changing the position of the internal optical element by simple means. Furthermore, in a traffic lighting system, the focal length of the lighting device can be adjusted by simple means to illuminate a light intensity distribution that complies with traffic laws and regulations.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a three-dimensional schematic diagram of a lighting device according to an embodiment of the invention. Fig. 2 is a three-dimensional exploded schematic diagram of the lighting device of Fig. 1. Please refer to Figure 1 and Figure 2. This embodiment provides an illuminating device 100, which can adjust the focal length of the illuminating device 100 by simply changing the position of the internal optical elements. The lighting device 100 of this embodiment can be applied to a traffic lighting system, such as traffic lights such as traffic signs and safety indicators. In other words, in a traffic lighting system, the focal length of the lighting device 100 can be adjusted by simple means to illuminate a light intensity distribution that complies with traffic laws and regulations.

In this embodiment, the lighting device 100 includes a housing 110, a light-emitting element 120, and an optical element 130. The housing 110 has an accommodating space C for accommodating the light-emitting element 120 and the optical element 130. In this embodiment, the light-emitting element 120 is, for example, a light-emitting diode (LED), and the optical element 130 is, for example, a Fresnel lens (Fresnel lens), but in some embodiments, it can also be used. Other types of light-emitting elements and optical elements are not limited to the present invention. In addition, in this embodiment, the lighting device 100 may further include a protective cover 140 configured to be disposed on the housing 110 to cover the accommodating space C, and the present invention is not limited to this.

The housing 110 includes a plurality of first matching groups 112_1, 112_2, 112_3, these first matching groups 112_1, 112_2, 112_3 are located on the inner wall of the housing 110, and the optical element 130 includes a second matching group 132 located on the optical element At the outer edge of 130, the second matching group 132 of the optical element 130 can be matched with the first matching groups 112_1, 112_2, 112_3 of the housing 110, respectively. It is worth mentioning that the distances between these first matching groups 112_1, 112_2, and 112_3 are different from the light emitting element 120, respectively. That is, the first matching groups 112_1, 112_2, 112_3 are respectively located at different depth positions of the inner wall of the housing 110. Therefore, the user can move the optical element 130 from one group of the first matching group 112_1, 112_2, 112_3 to another group of the first matching group 112_1, 112_2, 112_3 through an operating means, and then make the optical element 130 and the light-emitting element The distance between 120 changes to achieve the effect of changing the focal length of the lighting device 100.

Fig. 3 is a schematic front view of the optical element in Fig. 1. Fig. 4 is a schematic front view of the housing in Fig. 1. Please refer to Figure 2 to Figure 4. In detail, in this embodiment, the housing 110 includes three groups of first matching groups 112_1, 112_2, 112_3, and each of the first matching groups 112_1, 112_2, 112_3 has a plurality of engaging portions T, for example, the number is The three latch structures are shown in Figure 4. The second matching group 132 of the optical element 130 includes a plurality of engaging grooves U, such as three engaging groove structures, as shown in FIG. 3. Among them, in parallel to the transmission direction F of the light emitted by the light-emitting element 120, the engaging portion T of the first matching group 112_1, the engaging portion T of the first matching group 112_2, and the engaging portion T of the first matching group 112_3 Do not overlap each other.

Fig. 5 is a schematic cross-sectional view of the lighting device of Fig. 1. Please also refer to Figure 3 to Figure 5. Therefore, when the plurality of engaging grooves U in the second matching group 132 of the optical element 130 are staggered in the plurality of engaging portions T in the first matching group 112_1 of the housing 110, the optical element 130 is located in the first of the accommodating space C One position, as shown in Figure 5. If the user wants to change the focal length of the illuminating device 100, the optical element 130 can be rotated in a rotating manner so that the multiple engaging grooves U in the second matching set 132 are located on the multiple cards in the first matching set 112_1 of the housing 110. The engaging portion T further allows the engaging groove U to pass through the plurality of engaging portions T in the first matching group 112_1 to move parallel to the transmission direction F of the light emitted by the light-emitting element 120 to the first matching group 112_2. The engaging portion T is misaligned and fixed to the second position in the accommodating space C.

When you want to continue to change the focal length of the lighting device 100, you can move the optical element 130 to the accommodating space C through the plurality of engaging parts T corresponding to the first matching group 112_1, 112_2, 112_3 according to the above-mentioned operation method. Other locations. In this way, the focal length of the lighting device 100 can be adjusted by changing the position of the internal optical elements by simple means. Furthermore, in a traffic lighting system, the focal length of the lighting device 100 can be adjusted by simple means to illuminate a light intensity distribution that complies with traffic laws and regulations.

In this embodiment, the arrangement pitch of the plurality of engaging portions T in the same first matching group 112_1, 112_2, 112_3 is greater than that of the plurality of engaging portions T in the other first matching group 112_1, 112_2, 112_3 The arrangement spacing is equal. That is, the arrangement pitch of the plurality of engaging portions T of the first matching group 112_1, the arrangement pitch of the plurality of engaging portions T of the first matching group 112_2, and the arrangement pitch of the plurality of engaging portions T of the first matching group 112_3 All equal. The arrangement pitch of the plurality of engaging grooves U of the second matching group 132 is the same as the arrangement pitch of the plurality of engaging portions T in each of the first matching groups 112_1, 112_2, 112_3. In this way, the flexibility of changing the focal length can be improved, and the structure can be easily manufactured.

Fig. 6 is a schematic diagram of a light distribution curve of a lighting device according to an embodiment of the present invention. Please refer to Figure 1 and Figure 6. In this embodiment, the light distribution curve shown in FIG. 6 can be generated by the lighting device 100 in FIG. 1, and the following will take the lighting device 100 in FIG. 1 as an example. In addition, in this embodiment, the lighting device 100 may further choose to include optical diffusion particles in the optical element 130 or the protective cover 140. Therefore, the energy of the light emitted by the light emitting element 120 after passing through the optical element 130 or the protective cover 140 can be uniformized and concentrated, as shown in FIG. 6.

FIG. 7 is a three-dimensional exploded schematic diagram of a lighting device according to another embodiment of the invention. Please refer to Figure 7. The lighting device 100A of this embodiment is similar to the lighting device 100 of FIG. 1. The difference between the two is that, in this embodiment, the second matching group 132A of the optical element 130 has an external thread structure, and each first matching group 112A of the housing 110 has an internal thread structure. In detail, in this embodiment, the internal thread structures of the first matching group 112A may be arranged continuously and adjacently. In other words, a plurality of consecutive first matching groups 112A form internal thread structures with different depth positions, so that the optical element 130 can be moved to the housing 110 by matching the second matching group 132A with the first matching group 112A. Different depths within, and then change the focal length. In this way, the focal length of the illuminating device 100A can be adjusted by changing the position of the internal optical element by simple means. Furthermore, in a traffic lighting system, the focal length of the lighting device 100A can be adjusted by simple means to illuminate a light intensity distribution that complies with traffic laws and regulations.

In summary, the housing of the lighting device of the present invention has a plurality of first matching groups, the optical element has a second matching group, and the second matching group is adapted to be matched to the first matching groups respectively. Therefore, the distance between the optical element and the light-emitting element can be changed by moving the optical element from one of the first matching group of the housing to the other of the first matching group. In this way, the focal length of the lighting device can be adjusted by changing the position of the internal optical element by simple means. Furthermore, in a traffic lighting system, the focal length of the lighting device can be adjusted by simple means to illuminate a light intensity distribution that complies with traffic laws and regulations.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be determined by the scope of the attached patent application.

100, 100A: lighting device 110: shell 112_1, 112_2, 112_3, 112A: the first matching group 120: light-emitting element 130: optical components 132, 132A: second matching group 140: Protective cover C: Housing space F: transfer direction T: Card joint U: snap slot

FIG. 1 is a three-dimensional schematic diagram of a lighting device according to an embodiment of the invention. Fig. 2 is a three-dimensional exploded schematic diagram of the lighting device of Fig. 1. Fig. 3 is a schematic front view of the optical element in Fig. 1. Fig. 4 is a schematic front view of the housing in Fig. 1. Fig. 5 is a schematic cross-sectional view of the lighting device of Fig. 1. Fig. 6 is a schematic diagram of a light distribution curve of a lighting device according to an embodiment of the present invention. FIG. 7 is a three-dimensional exploded schematic diagram of a lighting device according to another embodiment of the invention.

100: lighting device

110: shell

112_1, 112_2, 112_3: the first matching group

120: light-emitting element

130: optical components

132: Second matching group

140: Protective cover

C: Housing space

F: transfer direction

Claims (7)

A lighting device includes: a housing with an accommodating space, the housing includes a plurality of first matching groups, and is located on the inner wall of the housing; a light-emitting element is arranged in the housing and is located in the housing Space; and an optical element, including a second matching group located at the outer edge of the optical element, adapted to match the first matching groups of the housing, wherein the optical element is adapted to be parallel to the light emitting The transmission direction of the light emitted by the element is moved from a first position in the housing space of the housing to a second position in the housing space of the housing to change the focal length of the lighting device. The first matching group is a tenon structure, each of the first matching groups of the housing has a first plurality of engaging portions and a second plurality of engaging portions, and the second matching group of the optical element has multiple An engaging groove, wherein in a direction perpendicular to the plane where the optical element is located, the first plurality of engaging portions and the second plurality of engaging portions do not overlap with each other, when the optical element is located at the first position , The engaging grooves in the second matching group are misaligned with the first plurality of engaging parts in the first matching group, when the optical element is rotated so that the engaging groove pairs in the second matching group are located The first plurality of engaging portions in the first matching set, the engaging grooves are adapted to pass the first plurality of engaging portions to make the optical element parallel to the transmission direction of the light emitted by the light-emitting element Move up to the second position, when the optical element is located at the second position, the engaging grooves are misaligned with the second plurality of engaging portions in the first matching set; wherein the first plurality of engaging portions and The engaging grooves extend in a direction parallel to the transmission direction of the light emitted by the light-emitting element. According to the lighting device described in item 1 of the scope of patent application, the distances between the first matching groups and the light-emitting element are different. For the lighting device described in item 1 of the scope of patent application, the arrangement pitch of a part of the engaging parts is the same as the arrangement pitch of the engaging parts in the other part of the first matching groups. The lighting device described in item 1 of the scope of patent application further includes: a protective cover disposed on the housing to cover the accommodating space. The lighting device according to item 4 of the scope of patent application, wherein the protective cover includes optical diffusion particles. The lighting device according to the first item of the scope of patent application, wherein the optical element includes optical diffusion particles. According to the lighting device described in item 1 of the scope of patent application, the optical element is a Fresnel lens.

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