TWI482995B - Light collecting device and lighting equipment - Google Patents

Description

Light collecting device and lighting equipment

The present invention relates to a light collecting device and a lighting device, and more particularly to a light collecting device and a lighting device having a light guiding plate.

The development of electricity has brought great convenience to human beings, and daily life, work, driving or entertainment equipment cannot leave electricity. For the general public, the expenditure on electricity is an indispensable fixed expenditure for the family. For the government, how to supply electricity stably to maintain the needs of industry and people's livelihood is a problem that needs to be met every summer. Therefore, how to save electricity is a consensus that the whole people should have. In terms of lighting equipment in daily life, home lighting requires at least one lighting device per space. If a family of three bedrooms, two living rooms, one kitchen and one bathroom, at least seven lighting equipment is required, and in the office, Because it is a place where vision is highly used, in order to protect the vision of workers, it is necessary to install multiple lighting equipment, and modern houses are not required to be turned on during the day, so whether it is a general household or a business operator, In addition to a small amount of electricity bills, the consumption and replacement of lamps is also indispensable.

Nowadays, in the environment of energy shortage, sunlight is a natural resource that human beings can't use and use. The people who are interested in it all hope to develop solar panels with high conversion efficiency to effectively collect and convert sunlight into Electricity, in turn, replaces existing power equipment. However, solar panels are bulky and costly, and cannot truly achieve green lighting. Moreover, the energy efficiency of a general bulb is about 15%, and that of a fluorescent lamp is about 25%. If solar energy is converted into electric energy, the solar cell has a conversion efficiency of only 5 to 10%, and the use is limited. Therefore, the development of environmentally friendly, non-polluting and non-consumable natural light collecting devices and lighting equipment to replace the existing lighting equipment with electric lighting is a trend.

The invention provides an economical light collecting device and a lighting device, which collects sunlight as an illumination source to save power.

The invention provides a pollution-free light collecting device and a lighting device, which can reduce the consumption of natural resources and the emission of carbon dioxide.

The invention provides a light collecting device and a lighting device without consumables, which can reduce the cost of the lighting device.

The invention provides a light collecting device comprising a light guide plate, a reflective film and a first light collecting structure. The light guide plate has a light incident surface, a reflective surface and a light exit surface. The light incident surface and the reflective surface intersect to form a first inner corner of the light guide plate, and the light exit surface and the reflective surface intersect to form one of the light guide plates. An angle, wherein the first inner angle is smaller than the second inner angle. The reflective film covers the reflective surface or is adjacent to the reflective surface. The first light collecting structure is disposed on the light incident surface, and the light of a light source is refracted through the first light collecting structure to be incident into the light guide plate, and is reflected by the reflecting surface and the reflective film to finally reach the light emitting surface.

The invention provides a lighting device comprising a light guide plate, a reflective film and a first light collecting structure. The light guide plate has a light incident surface, a reflective surface and a light emitting surface, and the light incident surface intersects the reflective surface to form a first inner corner of the light guide plate, and the light emitting surface intersects the reflective surface to form the guide a second inner corner of the light panel, wherein the first inner angle is smaller than the second inner angle. The reflective film covers the reflective surface or is adjacent to the reflective surface. The first light collecting structure is disposed on the light incident surface, and the light of a light source is refracted through the first light collecting structure to be incident into the light guide plate, and is reflected by the reflective surface and the reflective film to finally reach the light emitting surface. . A collector is used to collect the light emitted by the light exit surface. One end of the transmission component is coupled to the collector. The light transmissive body is located at the other end of the transmission assembly, wherein light collected by the collector is transmitted to the light transmissive body via the transmission assembly to provide an illumination.

In an embodiment of the invention, the first light collecting structure comprises a plurality of first prism units, wherein the first prism units respectively have a first vertex angle and a first angle relative to the first vertex angle a bottom surface, and each of the first top corners has a first height from the first bottom surface.

In an embodiment of the invention, the first light collecting structure comprises a Fresnel lens.

In an embodiment of the invention, the light collecting device further includes a second light collecting structure disposed between the first light collecting structure and the light guiding plate.

In an embodiment of the present invention, the second light collecting structure includes a plurality of second prism units, wherein the second prism units respectively have a second vertex angle and a second angle relative to the second vertex angle And a second bottom surface, wherein each of the second top corners has a second height from the second bottom surface.

In an embodiment of the invention, each of the first apex angles and each of the second apex angles are disposed opposite to each other or alternately arranged. In addition, the angle of the first apex angle is between 20 degrees and 80 degrees. The angle of the first apex angle is less than the angle of the second apex angle. The first height is greater than the second height.

In an embodiment of the invention, the second light collecting structure comprises a Fresnel lens.

In an embodiment of the invention, the light guide plate is a light transmissive material, and the material thereof comprises glass or plastic.

In an embodiment of the invention, the light guide plate comprises a wedge plate, the top angle of the wedge plate is the first inner angle, and the angle of the first inner angle is between 1 and 30 degrees.

In an embodiment of the invention, the reflective film comprises a fully reflective film or a film having total reflection and partial reflection characteristics.

In an embodiment of the invention, the material of the reflective film comprises an organic material or an inorganic material.

In an embodiment of the invention, the area of the light incident surface of the light guide plate is larger than the area of the light exit surface.

In an embodiment of the invention, the light source comprises a natural light or a light emitting module.

In an embodiment of the invention, the light collecting device further includes a collector and a transmission component, the collector collecting the light emitted by the light emitting surface, and the collected light is transmitted through the transmission component.

In an embodiment of the invention, the transmission assembly comprises an optical fiber line.

In an embodiment of the invention, the light transmissive body comprises a wedge-shaped light guide plate.

Based on the above, the light collecting device and the lighting device of the present invention can introduce sunlight or other natural light into the room as an indoor lighting source or as another usable light source, without using electricity and lamps, and have the advantages of saving electricity, environmental protection, and no consumables. Reducing the consumption of natural resources and carbon dioxide emissions can truly achieve green lighting.

The above described features and advantages of the present invention will be more apparent from the following description.

In this embodiment, a light collecting device having a light guide plate can be introduced, and sunlight or other natural light can be introduced into the room as an indoor illumination source or as another available light source, without using a large lens or a solar battery to be converted into an illumination station. The power required is easy to install on the wall or roof of the building (home), and as long as the natural light is sufficient, the light can be collected and transmitted to the interior of the building (home) where it needs to be illuminated. Hereinafter, components such as a light guide plate, a reflective film, a first light collecting structure, a second light collecting structure, a collector, and a transmission assembly of the light collecting device will be described in detail, but the present invention is not limited to the following two embodiments.

1A and 1B are schematic views respectively showing a light guide plate of a light collecting device according to an embodiment of the present invention. Referring to FIG. 1A and FIG. 1B , the light guide plate 100 has a light incident surface 102 , a reflective surface 104 , and a light exit surface 106 . The light incident surface 102 intersects the reflective surface 104 to form a first inner angle θ1 of the light guide plate 100, and the light exit surface 106 intersects the reflective surface 104 to form a second inner angle θ2 of the light guide plate 100, wherein the first inner angle θ1 Less than the second inner angle θ2. For example, the light guide plate 100 is a light transmissive material, and the material thereof includes glass or plastic. The light guide plate 100 is, for example, a long and narrow wedge plate, and the angle of the apex angle of the wedge plate (ie, the first inner angle θ1) is between 1 and 30 degrees, preferably between 1 and 5 degrees.

Since the light guide plate 100 is a light transmissive material, the light L of the light source (natural light or light source module) is incident into the light guide plate 100 at an incident angle, and is reflected by the reflective surface 104 to finally reach the light exit surface 106. The reflective film 110 is, for example, a fully reflective film (as shown in FIG. 1A) or a film having total reflection and partial reflection characteristics (FIG. 1B) covering the reflective surface 104. The material of the reflective film 110 is, for example, an organic material or an inorganic material, and may be fabricated by a method such as attaching, coating, or physical/chemical deposition. In this embodiment, the reflective film 110 is used to increase the light utilization efficiency, but the thickness and refractive index of the reflective film 110 can be adjusted according to different conditions, and the invention is not limited. Further, according to the law of total reflection, when the light L enters the medium of lower refractive index from the medium of higher refractive index, and the incident angle is larger than the critical angle, since no refraction occurs, it is called total reflection. It can be seen that when the light L in the light guide plate 100 conforms to the law of total reflection, the light L will reach the light exit surface 106 directly or indirectly from the reflective surface 104 and the reflective film 110 with at least one total reflection, and finally exit from the light exit surface 106. In order to achieve the effect of collecting light.

In addition, FIG. 1C illustrates a reflective film 110 of another embodiment disposed adjacent to the reflective surface 104. The reflective surface 104 and the reflective film 110 are separated by an appropriate spacing, and the reflective film 110 can also be used to increase light utilization. effectiveness. Therefore, the arrangement of the reflective film 110 is not limited by the above two embodiments.

It is to be noted that, in order to achieve the effect of collecting a large amount of light, the area of the light incident surface 102 of the light guide plate 100 and the area of the reflective surface 104 are enlarged as much as possible, and the area of the light exit surface 106 is relative to the light incident surface 102. The area is reduced as much as possible, so that the total amount of light incident on the light guide plate 100 increases as the area of the light incident surface 102 increases, and the intensity of light emitted from the light guide plate 100 (the luminous flux per unit area) also follows the light exit surface. The area of 106 is reduced and increased. In addition, the light-incident surface 102 of the light guide plate 100 may be configured or formed according to the degree of light collection to form a first light-collecting structure and/or a second light-collecting structure to enhance light collection efficiency, and the first/second light collecting structure may be A polyhedral mirror structure or a concentrating lens (for example, a Fresnel lens). The following two embodiments will be described in detail with reference to the light guide plate having a prism structure, but the present invention is not limited to the following two embodiments.

2A and 2B are respectively a schematic view and a partial enlarged view of a light collecting device according to an embodiment of the present invention. Referring to FIG. 2A , the first light collecting structure 120 is disposed on the light incident surface 102 of the light guide plate 100 , and includes a plurality of first prism units 122 , for example, a plurality of triangular prism shaped prism bodies arranged in parallel and connected. Each of the first prism units 122 has a first apex angle α and a first bottom surface D1 with respect to the first apex angle α, and each of the first apex angles α has a first height H1 (for example, 2) from the first bottom surface D1. ~4 mm). Next, referring to FIG. 2B, in addition to configuring the first light collecting structure 120 to increase the light collecting effect, the second light collecting structure 130 may be disposed between the first light collecting structure 120 and the light guiding plate 100, and the second light collecting structure The 130 includes a plurality of second prism units 132, such as a plurality of triangular prism shaped mirror bodies arranged in parallel and connected. The second prism units respectively have a second apex angle β and a second bottom surface D2 with respect to the second apex angle β, and each of the second apex angles β has a second height H2 from the second bottom surface D2 (for example, 1 to 2 mm). The second height H2 is generally smaller than the first height H1.

In detail, when combining and fixing the first/second light collecting structures 120, 130, the orientations arranged or aligned in the following manners may be selected. The first vertex angle α of the first prism unit 122 and the second vertex angle β of the second prism unit 132 are opposite to each other, and the angle of the first vertex angle α is generally smaller than the angle of the second vertex angle β, but the present invention does not This is limited to this. For example, if the angle of the first apex angle α is an acute angle, usually between 20 degrees and 80 degrees, the preferred angle is between 30 degrees and 40 degrees, and the angle of the second apex angle β is an obtuse angle. , usually between 95 and 105.

In the above two embodiments, the light L of the light source may be refracted through the first light collecting structure 120 (the multi-mirror structure or the collecting lens) to be incident into the light guiding plate 100, and reflected by the reflecting surface 104 directly or indirectly. The ground reaches the light surface 106. In addition, the light L of the light source may also be refracted multiple times through the first/second light collecting structures 120, 130 (the multi-mirror structure or the collecting lens) to be incident into the light guide plate 100, and reflected by the reflecting surface 104 directly Or indirectly to the light exit surface 106. In any event, the light that is ultimately emitted by the light exit surface 106 can be collected to become available illumination. The following embodiments will describe the light that is emitted through the light guide plate, collected through the collector, and transmitted to the desired illumination by the transmission assembly. To provide the required lighting.

Furthermore, FIG. 2C illustrates the first/second light collecting structure 120, 130 of another embodiment, which sets the first apex angle α of the first sculpt unit 122 and the second apex angle of the second sculpt unit 132 The β is staggered with each other, that is, the first apex angle α and the second apex angle β do not need to be oppositely arranged. Therefore, the apex angle configuration is not limited by the above two embodiments.

3 is a block diagram of a lighting device in accordance with an embodiment of the present invention. Referring to FIG. 3, the lighting device includes a light collecting device 200, a collector 210, a transmission assembly 220, and a light transmitting body 230. The collector 210 collects the light emitted by the light guide plate of the light collecting device 200, and the collected light is transmitted via the transmission component 220. The collector is, for example, an optocoupler coupled to one end of the transmission assembly 220, and the transmission assembly 220 is, for example, a fiber optic line that allows light to travel along the path of the pipeline. The light transmissive body 230 is located at the other end of the transmission component 220, for example, a wedge-shaped light guide plate, and has a structure such as a light incident surface, a reflective surface, and a light exiting surface. However, the light transmitting body 230 is a reverse use of the light collecting principle of the light guiding plate. It is to restore the light transmitted by the fiber line to natural light for illumination. Therefore, the area of the light-emitting surface of the light-transmitting body 230 should be as large as possible to the area of the light-incident surface, which is exactly opposite to the light-collecting effect of the above-mentioned light guide plate, so that uniform illumination can be obtained. The light-transmitting body 230 described above may be replaced by other light-transmitting means, and the invention is not limited.

In summary, the light collecting device and the lighting device of the present invention can introduce sunlight or other natural light into the room as an indoor lighting source or as another usable light source, without using electricity and lamps, and have the advantages of saving electricity and environmental protection. No consumables, reduced consumption of natural resources and carbon dioxide emissions can truly achieve green lighting. As long as the natural light is sufficient, the light can be collected and transmitted to the interior of the building (home) where it needs to be illuminated, which is both practical and groundbreaking.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Light guide

102. . . Glossy surface

104. . . Reflective surface

106. . . Glossy surface

Θ1. . . First inner angle

Θ2. . . Second inner angle

L. . . Light

110. . . Reflective film

120. . . First light collection structure

122. . . First prism unit

130. . . Second light structure

132. . . Second mirror unit

α. . . First corner

β. . . Second top angle

D1. . . First bottom

D2. . . Second bottom

H1. . . First height

H2. . . Second height

200. . . Light collecting device

210. . . collector

220. . . Transmission component

230. . . Translucent body

1A and 1B are schematic views respectively showing a light guide plate of a light collecting device according to an embodiment of the present invention.

FIG. 1C is a schematic view of a reflective film of another embodiment.

2A and 2B are respectively a schematic view and a partial enlarged view of a light collecting device according to an embodiment of the present invention.

2C is a partial enlarged view of the first/second light collecting structure of another embodiment.

3 is a block diagram of a lighting device in accordance with an embodiment of the present invention.

100. . . Light guide

102. . . Glossy surface

104. . . Reflective surface

106. . . Glossy surface

120. . . First light collection structure

122. . . First prism unit

Θ1. . . First inner angle

Θ2. . . Second inner angle

L. . . Light

α. . . First corner

D1. . . First bottom

H1. . . First height

Claims (37)

A light collecting device includes: a light guiding plate having a light incident surface, a reflecting surface and a light emitting surface, wherein the light incident surface intersects the reflecting surface to form a first inner corner of the light guiding plate, and the light emitting surface Intersecting the reflective surface to form a second inner corner of the light guide plate, wherein the first inner angle is smaller than the second inner angle; a reflective film covering the reflective surface or adjacent to the reflective surface; An optical structure is disposed on the light incident surface, and light of a light source is refracted through the first light collecting structure to be incident into the light guide plate, and reflected by the reflective surface and the reflective film to finally reach the light output surface. The light collecting device of claim 1, wherein the first light collecting structure comprises a plurality of first prism units, the first prism units respectively having a first vertex angle and relative to the first a first bottom surface of the top corner, and each of the first top corners has a first height from the first bottom surface. The light collecting device of claim 1, wherein the first light collecting structure comprises a Fresnel lens. The light collecting device of claim 2, further comprising a second light collecting structure disposed between the first light collecting structure and the light guiding plate. The light collecting device of claim 4, wherein the second light collecting structure comprises a plurality of second prism units, each of the second prism units having a second vertex angle and opposite to the second a second bottom surface of the top corner, and each of the second top corners has a second height from the second bottom surface. The light collecting device of claim 5, wherein each of the first apex angles and each of the second apex angles are disposed opposite to each other or alternately arranged. The light collecting device of claim 6, wherein the angle of the first apex angle is between 20 degrees and 80 degrees. The light collecting device of claim 7, wherein the angle of the first apex angle is smaller than the angle of the second apex angle. The light collecting device of claim 5, wherein the first height is greater than the second height. The light collecting device of claim 4, wherein the second light collecting structure comprises a Fresnel lens. The light collecting device of claim 1, wherein the light guiding plate is a light transmissive material, and the material thereof comprises glass or plastic. The light collecting device of claim 1, wherein the light guide plate comprises a wedge plate, the top angle of the wedge plate is the first inner angle, and the angle of the first inner angle is between 1 and 30 degrees. . The light collecting device of claim 1, wherein the reflective film comprises a fully reflective film or a film having total reflection and partial reflection characteristics. The light collecting device of claim 1, wherein the material of the reflective film comprises an organic material or an inorganic material. The concentrating device of claim 1, wherein an area of the light incident surface of the light guide plate is larger than an area of the light exit surface. The light collecting device of claim 1, wherein the light source comprises a natural light or a light emitting module. The light collecting device of claim 1, further comprising a collector and a transmission component, the collector collecting the light emitted by the light exiting surface, and the collected light is transmitted through the transmission component. The light collecting device of claim 17, wherein the transmitting component comprises an optical fiber line. An illumination device includes: a light guide plate having a light incident surface, a reflective surface, and a light exiting surface, the light incident surface intersecting the reflective surface to form a first inner corner of the light guide plate, and the light emitting surface is The reflective surfaces intersect to form a second inner corner of the light guide plate, wherein the first inner angle is smaller than the second inner angle; a reflective film covering the reflective surface or adjacent to the reflective surface; The light structure is disposed on the light incident surface, and the light of a light source is refracted through the first light collecting structure and incident into the light guide plate, and is reflected by the reflective surface and the reflective film to reach the light emitting surface; a collector for collecting light emitted from the light-emitting surface; a transmission component having one end coupled to the collector; and a light transmitting body at the other end of the transmission assembly, wherein the light collected by the collector is via The transmission assembly is transmitted to the light transmissive body to provide an illumination. The illumination device of claim 19, wherein the first light collecting structure comprises a plurality of first prism units, each of the first prism units having a first vertex angle and a first top angle a first bottom surface of the corner, and each of the first top corners has a first height from the first bottom surface. The illuminating device of claim 19, wherein the first light collecting structure comprises a Fresnel lens. The lighting device of claim 20, further comprising a second light collecting structure disposed between the first light collecting structure and the light guiding plate. The illuminating device of claim 22, wherein the second light collecting structure comprises a plurality of second prism units, each of the second mirror units having a second apex angle and a second top a second bottom surface of the corner, and each of the second top corners has a second height from the second bottom surface. The lighting device of claim 23, wherein each of the first apex angles and each of the second apex angles are disposed opposite to each other or staggered. The lighting device of claim 24, wherein the angle of the first apex angle is between 20 degrees and 80 degrees. The illuminating device of claim 25, wherein the angle of the first apex angle is smaller than the angle of the second apex angle. The lighting device of claim 23, wherein the first height is greater than the second height. The illumination device of claim 22, wherein the second light collecting structure comprises a Fresnel lens. The lighting device of claim 19, wherein the light guide plate is a light transmissive material, and the material thereof comprises glass or plastic. The illuminating device of claim 19, wherein the light guide plate comprises a wedge plate, the apex angle of the wedge plate is the first inner angle, and the angle of the first inner angle is between 1 and 30 degrees. The illuminating device of claim 19, wherein the reflective film comprises a fully reflective film or a film having total reflection and partial reflection characteristics. The illuminating device of claim 19, wherein the material of the reflective film comprises an organic material or an inorganic material. The illuminating device of claim 19, wherein an area of the light incident surface of the light guide plate is larger than an area of the light exit surface. The illuminating device of claim 19, wherein the light source comprises a natural light or a light source module. The lighting device of claim 19, further comprising a collector and a transport assembly, the collector collecting light emitted by the light exiting surface, and the collected light is transmitted via the transport assembly. The lighting device of claim 35, wherein the transmission component comprises a fiber optic line. The illuminating device of claim 19, wherein the light transmissive body comprises a wedge-shaped light guide plate.