Patent Application
20170030557
The present invention relates generally to an optical structure, and particularly to an optical structure designed using a reflective housing and a lens module so that a light-emitting device can emit light with high uniformity.
Modern technologies are progressing increasingly. Given the human-based thinking model, lamps are always one of the most important inventions in the history. Until now, there haven been various kinds of lamps, including table lamps, floor lamps, streetlamps, billboard lamps, traffic lights, flashlights, and car lamps. There lamps are applied in various scenarios. Apparently, lamps are a very important invention to us.
As the times advance, the evolution of lamps becomes faster increasingly. Electric lamps are developed gradually from the traditional simplest incandescent bulbs to solar-cell lamps, and finally to LED lamps today. LED lamps requires no warm-up time. They have the advantages of fast response time, small size, saving power, low pollution, high mass productivity, and high reliability. Besides, according to the requirements in applications, they can be manufactured as miniature or matrix-type devices. Hence, LEDs are applied extensively to various lighting applications and their market share is growing. They are applied to different products such as LED car lamps, LED streetlamps, LED table lamps, and various small lamps for displaying.
Currently, there are many products making use of LEDs. In particular, many stores have rows of billboard lamps or spotlight for large billboards at night. According to the prior art, the T-bar billboards along highways adopt projective lights for lighting the billboards at night and thus showing the advertisements clearly. Nonetheless, to light a large-area billboard, multiple sets of lamps are required. In addition, each set of lamps needs to include a plurality of LED chips to light the corresponding billboards. It requires massive electrical energy and expense by using the above method, making the charge for lighting per night daunting. Considering the drawbacks of the billboards according to the prior art, how to reduce the cost while maintaining the same efficacy of billboards has become the problem to be solved and the target to be achieved.
Accordingly, the present invention provides an optical structure for lamps. By using the design of optical structure for lens module and reflective housing, light-emitting devices are enabled to project light with high uniformity and the required quantity of lamps can be reduced. Furthermore, the required quantity of light-emitting devices in each lamp can be reduced. Thereby, better light-emitting efficiency can be achieved by using fewer light-emitting devices.
An objective of the present invention is to provide an optical structure. By using the design of optical structure, light-emitting devices are enabled to project light with high uniformity.
In order to achieve the above objective and efficacy, the present invention provides an optical structure, which comprises a lens module, a reflective housing, and a light-emitting device. The lens module includes a lens body, which includes a first curved surface and a second curved surface connected symmetrically. The first curved surface extends from the top of the lens body to the front and left sides and reaches the bottom part; the second curved surface extends from the top of the lens body to the front and right sides and reaches the bottom part. The reflective housing includes a housing, which includes a reflective concave surface facing the lens module. In addition, one end of the housing is higher than the lens module. The light-emitting device is disposed between the lens module and the reflective housing and inside the lens module.
In order to make the structure and characteristics as well as the effectiveness of the present invention to be further understood and recognized, the detailed description of the present invention is provided as follows along with embodiments and accompanying figures.
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The lens module 10 is a continuous curved surface formed by connecting the first and second curved surfaces 120, 130, which are just the light-emitting surfaces of the light-emitting device 30. Besides, the reflective housing 20 is a pointed arc structure. The reflective housing 20 according to the present embodiment is disposed on one side of the lens module 10. The lens module 10 includes a first fixing structure 150 on a contact surface 140 opposing the reflective housing 20. A second fixing structure 230 is disposed on the reflective housing opposing the first fixing structure 150. The first fixing structure 150 combines with the second fixing structure 230. Moreover, the first fixing structure 150 includes one or more fixing pillar 1510; the second fixing structure 230 includes one or more fixing hole 2310. The one or more fixing pillar 1510 passes through the one or more fixing hole 2310. In addition, the one or more fixing pillar 1510 includes a fixing hook 1511 at the end thereof. The fixing hook 1511 hooks and thus fixed in the one or more fixing hole 2310.
Besides, the light-emitting device 30 is disposed on a base 310. The base 310 is disposed inside the reflective concave surface 220 of the reflective housing 20 and inside a concave 11. A part of the light-emitting device 30 is disposed in the concave 11; the other part thereof is disposed inside the reflective concave surface 220. The light-emitting device 30 is disposed in the package structure of LED using a lens housing.
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The reflective housing 20 is a pointed arc housing corresponding to the illuminating angle of the light 100 and thus controlling the reflection of the light 100 from the reflective housing 20. Then the reflected light 100 becomes a uniform light source to a certain range. In addition, the reflective concave surface 220 covers completely the light 100 in the downward direction. In other words, the reflective concave surface 220 can reflect the light 100 from the light-emitting device 30 in the downward direction and concentrate the light 100 to illuminate upwards without consuming the light source. Moreover, the light 100 of the light-emitting device 30 illuminate the reflective concave surface 220. The curvature of the reflective concave surface 220 enables the directions of the optical paths of the reflected light 100 to be upward and forward. Thereby, optical energy loss of the light 100 after secondary reflection can be avoided and most of the light 100 by the light-emitting device 30 can be utilized efficiently.
Furthermore, the horizontal illuminating range of the light 100 is influenced by the lens module 10. A part of the light 100 by the light-emitting device 30 passes through the connected surface of the first and second curved surfaces 120, 130 and illuminates upwards directly. The other part of the light 100 passes through the first and second curved surfaces 120, 130. The light 100 is influenced by the curved surfaces and refracted to both sides, thus broadening the illuminating ranges of the light 100 on both sides.
According to the present embodiment, the lens module 10 is used for broadening the illuminating width of the light 100. The reflective housing 20 is used for concentrating the energy of the light 100 to illuminate upwards. Thereby, the light-emitting device 30 can achieve the preferred light-emitting effect and the projected light is highly uniform.
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To sum up, the present invention relates to an optical structure. The light-emitting device emits the light. The light is reflected by the reflective housing in the vertical direction and thus enabling the light to be concentrated and illuminate upwards. The light is refracted by the lens module in the horizontal direction and thus illuminating to both sides. It is thereby possible to project light with high uniformity by using small light-emitting devices.
Accordingly, the present invention conforms to the legal requirements owing to its novelty, nonobviousness, and utility. However, the foregoing description is only embodiments of the present invention, not used to limit the scope and range of the present invention. Those equivalent changes or modifications made according to the shape, structure, feature, or spirit described in the claims of the present invention are included in the appended claims of the present invention.
