LAMP WITH ADJUSTABLE LIGHT PATTERN

A lamp with adjustable light pattern including a light source, a first reflective element including a first reflective surface adapted to reflective the light beam emitted from the light source, a second reflective element including a second reflective surface adapted to reflect the light beam reflected by the first reflective surface, and a driving mechanism configured to drive the first reflective element and/or the second reflective element is provided. The first reflective element has a first curved surface and a first another curved surface different from the first curved surface, and the first reflective surface is the first curved surface or the first another curved surface; and/or the second reflective element has a second curved surface and a second another curved surface different from the second curved surface, and the second reflective surface is the second curved surface or the second another curved surface.

This application claims the benefit of Taiwan application Serial No. 106143900, filed Dec. 14, 2017, the disclosure of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

The disclosure relates in general to a lamp, and more particularly to a lamp with adjustable light pattern.

BACKGROUND

The illumination device has become an indispensable and important equipment in our daily lives. The design of lamps used in different occasions is different so as to meet the illumination requirement of each occasion.

However, the lamp under one design is usually applicable for only one occasion instead of being flexibly adjusted for different occasions. Further, it may also need to replace the lamp manually.

SUMMARY

The disclosure relates to a lamp with adjustable light pattern.

According to one embodiment, a lamp with adjustable light pattern is provided. The lamp with adjustable light pattern includes a light source, a first reflective element, a second reflective element and a driving mechanism. The light source is configured to emit a light beam. The first reflective element includes a first reflective surface adapted to reflect the light beam emitted from the light source. The second reflective element includes a second reflective surface adapted to reflect the light beam reflected by the first reflective surface. The driving mechanism is configured to drive at least one of the first reflective element and the second reflective element to move. The first reflective element has a first curved surface and a first another curved surface different from the first curved surface, and the first reflective surface is the first curved surface or the first another curved surface different from the first curved surface; and/or the second reflective element has a second curved surface and a second another curved surface different from the second curved surface, and the second reflective surface is the second curved surface or the second another curved surface different from the second curved surface.

DETAILED DESCRIPTION

In the embodiments of the present disclosure, the light beam emitted from the light source is first reflected by the first reflective surface of the first reflective element, and then reflected by the second reflective surface of the second reflective element to emit out. In addition, at least one of the first reflective element, having a first curved surface and a first another curved surface different from the first curved surface, and the second reflective element, having a second curved surface and a second another curved surface different from the second curved surface, is driven to move by the driving mechanism, such that the first curved surface or the first another curved surface is set as the first reflective surface, and/or the second curved surface or said the second another curved surface is set as the second reflective surface. Thus, the overall light pattern of the lamp can be changed. Therefore, driving at least one of the first reflective element and the second reflective element to move by the driving mechanism may have the lamp emit several different light patterns.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. Although the present disclosure does not illustrate all possible embodiments, other embodiments not disclosed in the present disclosure are still applicable. Moreover, the dimension scales used in the accompanying drawings are not based on actual proportion of the product. Therefore, the specification and drawings are used for explaining and describing the embodiments only, but not used for limiting the scope of protection of the present disclosure. Furthermore, in the drawings of the embodiments, some elements are omitted so that some features can be clearly illustrated. Designations common to the accompanying drawings and embodiments are used to indicate identical or similar elements.

FIG. 1illustrates a perspective view of the lamp1with adjustable light pattern according to one embodiment.FIG. 2illustrates a cross-sectional side view of the lamp1with adjustable light pattern according to one embodiment. Referring toFIGS. 1 and 2, the lamp1includes a light source10, a first reflective element11, a second reflective element12and a driving mechanism13. The light source10is configured to emit light beams. The light source10may be, for example, a Light-Emitting Diode (LED), an Organic Light-Emitting Diode (OLED), a Chip-On-Board (COB) LED, a Surface Mount Device (SMD) type LED, a laser diode, a High-Intensity Discharge (HID) lamp, a fluorescent lamp, a mercury lamp, a halogen lamp, and so on.

The second reflective element12has an accommodation space120. The first reflective element11is disposed in the accommodation space120. In detail, the light source10and the second reflective element12may be arranged together. The light emitting surface of the light source10is exposed from the second reflective element12. The second reflective element12extends from the light source10thus to form the accommodation space120. The first reflective element11includes a first reflective surface111. The second reflective element12includes a second reflective surface121. The second reflective surface121may be the inner surface of the second reflective element12and surround the accommodation space120. Herein, the first reflective surface111and the second reflective surface121may be made of materials capable of reflecting light beams. For example, a metal layer may respectively be plated on the first reflective surface111and the second reflective surface121so as to reflect light beams.

As shown inFIG. 2, the first reflective surface111may be arranged towards the light source10, and may reflect the light beams emitted from the light source10. In addition, the first reflective element11may be spaced from the light source10by a suitable distance, so that a majority of the light beams emitted from the light source10may be reflected by the first reflective surface111. Subsequently, the light beams reflected by the first reflective surface111may be reflected by the second reflective surface121to emit out so as to present the overall light pattern of the lamp.

In one embodiment, the driving mechanism13is configured to drive the first reflective element11to move. As shown inFIG. 2, the driving mechanism13may include a shaft133and a driving unit131coupled with each other. The shaft133is connected to the first reflective element11. The driving unit131may include a motor, such as a stepped motor. The driving unit131is configured to drive the shaft133to rotate, so that the first reflective element11rotates around the shaft133. Furthermore, the driving mechanism13may further include a positioning unit132electrically connected to the driving unit131. The positioning unit132may be, for example, a cam system, an encoder, sensor, switch and so on that can be reset to zero or sense the position, to implement addressing control. Thus, it may make the rotation control more accurate. Moreover, it is not limited to using the motor to directly rotate the shaft133in the present disclosure. In another embodiment, the shaft133may be indirectly driven to rotate by a mechanism such as belts, gears, chains, connecting rod and so on.

According to embodiments of the present disclosure, the shaft133may be arranged to have a specific angle with respect to the light emitting surface of the light source10. For example, in one embodiment, as shown inFIGS. 1 and 2, the shaft133is arranged parallel to the light emitting surface of the light source10. That is, the plane of rotation of the first reflective element11is perpendicular to the light emitting surface of the light source10. In another embodiment, the shaft133may be arranged perpendicular to the light emitting surface of the light source10. That is, the plane of rotation of the first reflective element11is parallel to the light emitting surface of the light source10. But the present disclosure is not limited thereto.

In one embodiment, a metal layer may be plated on the surface of the shaft133so as to enhance the light extraction efficiency of the lamp1. Furthermore, in one embodiment, the driving mechanism13may rotate the first reflective element11by means of, for example, a solenoid valve, a magnetic levitation and so on. In such a condition, the shaft133may be omitted.

FIGS. 3A-3Billustrate exemplary diagrams showing how to adjust light pattern of the lamp1according to the embodiment ofFIG. 2. As shown inFIG. 3A, the first reflective element11has a first curved surface1111. In this attitude, the first reflective surface111is arranged towards the light source10with the first curved surface1111. In one embodiment, the first curved surface1111may have a freeform surface or a variable curvature distribution. Herein, the freeform surface may represent a single reflective mirror having a variable curvature distribution thereon, and the variable curvature distribution may represent a varying curvature distribution composed of several reflective mirrors. For instance, the first curved surface1111may have a freeform surface, such as a distribution of aspheric surface, and may be symmetrical to the optical axis A. For example, the first curved surface1111may face the light source10with a convex contour at the optical axis A, and may face the light source10with a concave contour away from the optical axis A. But the present disclosure is not limited thereto. In another embodiment, the first curved surface1111may be asymmetrical to the optical axis A.

On the other hand, the second reflective element12has a second curved surface. In this attitude, the second reflective surface121is the second curved surface. In one embodiment, the second curved surface may have a constant curvature distribution. For instance, the second curved surface may have a distribution of spherical curvature, but the present disclosure is not limited thereto. In another embodiment, the second curved surface may also have a freeform surface or a variable curvature distribution. For example, the second curved surface may have a variable curvature distribution which may be composed of several reflective mirrors instead of being a smooth curved surface. Furthermore, the second curved surface may be symmetrical or asymmetrical to the optical axis A.

As shown inFIG. 3A, the light beam L emitted from light source10may be reflected by the first reflective surface111having the first curved surface1111first. Subsequently, the reflected light beam L may further be reflected by the second reflective surface121having the second curved surface to emit out, so that the lamp1emits a first type of light pattern. In this attitude, for example, the lamp1emits light at a large angle.

In addition to the first curved surface1111, the first reflective element11further has a first another curved surface1112different from the first curved surface1111. To make the lamp1emit other types of light pattern, the shaft133of the driving mechanism13(as designated inFIG. 1andFIG. 2) may be driven to rotate. Thus, the first reflective element11may rotate accordingly, while the second reflective element12is stationary. As shown inFIG. 3B, herein, the first reflective element11rotate around the shaft133by about 180 degrees. In this attitude, the first reflective surface111is arranged towards the light source10with the first another curved surface1112which may, for example, have a convex contour facing the light source10. In one embodiment, the first another curved surface1112may also have a freeform surface or a variable curvature distribution. For instance, the first another curved surface1112may have a freeform surface, such as a distribution of aspheric surface, and may be symmetrical to the optical axis A. But the present disclosure is not limited thereto. In another embodiment, the first another curved surface1112may be asymmetrical to the optical axis A.

As shown inFIG. 3B, the light beam L′ emitted from the light source10may be reflected by the first reflective surface111having the first another curved surface1112different from the first curved surface1111first. Subsequently, the reflected light beam L′ may further be reflected by the second reflective surface121having the second curved surface to emit out, so that the lamp1emits another type of light pattern. In this attitude, for example, the lamp1emits light at a small angle.

The embodiment ofFIGS. 3A-3Bis described with the case that the first reflective element11rotates by about 180 degrees. However, the first reflective element11may rotate by different degrees, so that the first reflective surface111is arranged towards the light source10with a specific curved surface. Thus, the lamp1may emit several different types of light patterns.

FIG. 4illustrates an exemplary diagram showing how to adjust light pattern of the lamp2according to another embodiment. Referring toFIG. 4, herein, the relative positions among the light source20, the first reflective element21and the second reflective element22are similar to those of the embodiment ofFIGS. 3A-3B, and it will not be described here again.

As shown inFIG. 4, the first reflective element21has a first curved surface. In this attitude, the first reflective surface211is the first curved surface. In one embodiment, the first curved surface may be arranged to be convex towards the light source20, but the first curved surface may also be arranged to be concave towards the light source20. Furthermore, the first curved surface may have a constant curvature distribution. For instance, the first curved surface may have a distribution of spherical curvature, but the present disclosure is not limited thereto. In another embodiment, the first curved surface may also have a freeform surface or a variable curvature distribution. For example, the first curved surface may have a variable curvature distribution which may be composed of several reflective mirrors instead of being a smooth curved surface. Furthermore, the first curved surface may be symmetrical or asymmetrical to the optical axis A.

On the other hand, the second reflective element22has a second curved surface2211. In this attitude, the second reflective surface221is the second curved surface2211. In one embodiment, the second curved surface2211may have a constant curvature distribution, such as a distribution of spherical curvature, but the present disclosure is not limited thereto. In another embodiment, the second curved surface2211may also have a freeform surface or a variable curvature distribution. For example, the second curved surface2211may have a variable curvature distribution which may be composed of several reflective mirrors instead of being a smooth curved surface. Furthermore, the second curved surface2211may be symmetrical or asymmetrical to the optical axis A.

The difference between the embodiment ofFIGS. 3A-3Band the present embodiment is that in the present embodiment, the light pattern of the lamp2may be changed by driving the second reflective element22to move by the driving mechanism.

In detail, as shown in the part depicted by solid line inFIG. 4, the light beam L emitted from the light source20may be reflected by the first reflective surface211having the first curved surface first. Subsequently, the reflected light beam L may further be reflected by the second reflective surface221having the second curved surface2211to emit out, so that the lamp2emits a first type of light pattern. In this attitude, for example, the lamp2emits light at a small angle.

To make the lamp2emit other types of light pattern, the driving mechanism may drive the second reflective element22to move. Thus, the attitude of the second reflective element22may be changed accordingly, while the first reflective element21is stationary. In one embodiment, the second reflective element22may be made of a flexible material. Therefore, the shape of the second reflective element22may be changed by the driving mechanism, so that the second reflective element22further has a second another curved surface2212different from the second curved surface2211. Similarly, the second another curved surface2212may also have a freeform surface, a variable curvature distribution or a constant curvature distribution. In addition, the second another curved surface2212may be symmetrical or asymmetrical to the optical axis A.

As shown in the part depicted by dotted line inFIG. 4, the light beam L′ emitted from the light source20may be reflected by the first reflective surface211having the first curved surface first. Subsequently, the reflected light beam L′ may further be reflected by the second reflective surface221having the second another curved surface2212different from the second curved surface2211to emit out, so that the lamp2emits another type of light pattern. In this attitude, for example, the lamp2emits light at a large angle.

Similarly, the second reflective element22may further be transformed into other shapes by the driving mechanism, so that the second reflective surface221may reflect the light beam reflected by the first reflective surface211with a specific curved surface. Thus, the lamp2may emit several different types of light patterns.

FIGS. 5A-5Billustrate exemplary diagrams showing how to adjust light pattern of the lamp3according to an alternative embodiment. Referring toFIGS. 5A-5B, herein, the relative positions among the light source30, the first reflective element31and the second reflective element32are similar to those of the embodiment ofFIGS. 3A-3B, and it will not be described here again.

In one embodiment, the design of the first reflective element31may be similar to that of the first reflective element11and the modification thereof in the embodiment ofFIGS. 3A-3B, the design of the second reflective element32may be similar to that of the second reflective element22and the modification thereof in the embodiment ofFIG. 4, and it will not be described here again.

The difference between the embodiments ofFIGS. 3A-3B,FIG. 4and the present embodiment is that in the present embodiment, the light pattern of the lamp3may be changed by selectively driving the first reflective element31and the second reflective element32to move by the driving mechanism.

In detail, as shown inFIG. 5A, the first reflective element31has a first curved surface3111. First, the first reflective element31may be driven to be the attitude as shown inFIG. 5Aby the driving mechanism. In this attitude, the first reflective surface311is arranged towards the light source30with the first curved surface3111. On the other hand, the second reflective element32has a second curved surface3211. In this attitude, the second reflective surface321is the second curved surface3211.

As shown in the part depicted by solid line inFIG. 5A, the light beam L1emitted from the light source30may be reflected by the first reflective surface311having the first curved surface3111first. Subsequently, the reflected light beam L1may further be reflected by the second reflective surface321having the second curved surface3211to emit out, so that the lamp3emits a first type of light pattern.

Subsequently, the driving mechanism may drive the second reflective element32to move. Thus, the attitude of the second reflective element32may be changed accordingly. As shown in the part depicted by dotted line inFIG. 5A, the second reflective element32has a second another curved surface3212different from the second curved surface3211through the drive of the driving mechanism. In this attitude, the second reflective surface321is the second another curved surface3212. The light beam L2emitted from the light source30may be reflected by the first reflective surface311having the first curved surface3111first. Subsequently, the reflected light beam L2may further be reflected by the second reflective surface321having the second another curved surface3212different from the second curved surface3211to emit out, so that the lamp3emits a second type of light pattern.

Moreover, in addition to the first curved surface3111, the first reflective element31further has a first another curved surface3112. As shown inFIG. 5B, the driving mechanism may further drive the first reflective element31to rotate, so that the first reflective element31rotates around the shaft333by about 180 degrees. In this attitude, the first reflective surface311is arranged towards the light source30with the first another curved surface3112. However, the first reflective element31may rotate by different degrees, so that the first reflective surface311is arranged towards the light source30with a specific curved surface.

As shown in the part depicted by solid line inFIG. 5B, the light beam L3emitted from the light source30may be reflected by the first reflective surface311having the first another curved surface3112different from the first curved surface3111first. Subsequently, the reflected light beam L3may further be reflected by the second reflective surface321having the second curved surface3211to emit out, so that the lamp3emits a third type of light pattern.

Subsequently, the driving mechanism may drive the second reflective element32to move. Thus, the attitude of the second reflective element32may be changed accordingly. As shown in the part depicted by dotted line inFIG. 5B, the second reflective element32has the second another curved surface3212different from the second curved surface3211through the drive of the driving mechanism. In this attitude, the second reflective surface321is the second another curved surface3212. The light beam L4emitted from the light source30may be reflected by the first reflective surface311having the first another curved surface3112different from the first curved surface3111first. Subsequently, the reflected light beam L4may further be reflected by the second reflective surface321having the second another curved surface3212different from the second curved surface3211to emit out, so that the lamp3emits a fourth type of light pattern.

Similarly, the driving mechanism may further drive the first reflective element31to rotate by different degrees, and/or drive the second reflective element32to be transformed into other shapes, so that the first reflective surface311is arranged towards the light source30with a specific curved surface, and/or the second reflective surface321may reflect the light beam reflected by the first reflective surface311with a specific curved surface. Thus, the lamp3may emit several different types of light patterns.

According to several embodiments set above, the light beam emitted from the light source may be reflected twice before emitting out, thereby shortening the optical path. Therefore, the above embodiments may further reduce the overall volume of the lamp, especially shorten the height of the lamp along the optical axis. Further, the lamp with adjustable light pattern provided in the present disclosure may have several different types of light patterns under a reduced volume.