TWM514009U - Multi-colour light guiding device - Google Patents

Description

Multi-color light guide

The present invention relates to a lighting device, and more particularly to a multi-color light guiding device.

Nowadays, lighting devices have been widely used in products such as keyboards, mobile phones, televisions, tablets and displays. In general, the light-emitting device is provided on the back side of these products to provide a light source, and projects on the front side of the product to reflect the pattern and the picture. The illuminating device usually uses a light-emitting diode as a light source to replace the traditional white heat lamp or fluorescent tube. The color of the pattern and the picture displayed on these products depends on the color of the light-emitting diode itself and the attached color. Filter color of filters, etc.

With the rapid development of the times, consumers are increasingly demanding the color of light-emitting devices. In order to provide a variety of color effects for light-emitting devices, the number of light-emitting diodes, color filters, and the like must be additionally increased. However, the increase in the number of light-emitting diodes, color filters, and the like causes problems such as an increase in cost, an increase in the overall volume thickness of the light-emitting device, and a complicated structure.

In view of the above, in the prior art, as the color effect of the light-emitting device is improved, problems such as an increase in overall volume thickness and a complicated structure are generated, and the production cost and product refinement are faced with the test.

Therefore, the purpose of the present invention is to provide a lightweight and thin multi-color light guiding device.

The present invention provides a multi-color light guiding device for solving the problems of the prior art, comprising: a light guiding plate, the side surface of which is a light incident surface and the top surface thereof is a light emitting surface, the guide Forming a microstructure on the top surface and/or a bottom surface of the light panel, the microstructure comprising an outwardly convex portion and/or an inwardly extending inner extension portion; a plurality of illumination sources, each of the illumination sources Providing light of different colors and emitting light corresponding to the light incident surface of the light guide plate, wherein the plurality of light emitting sources are disposed at an interval from each other, and the light emitted by the plurality of light emitting sources is different in the light guide plate The incident angle is incident on the microstructure, and is refracted and reflected by the microstructure to be emitted from the microstructure to the outside of the light guide plate at different exit angles to obtain various corresponding colors at different viewing angles with respect to the light guide plate. Light.

In an embodiment of the present invention, a multi-color light guiding device is provided, and the light guiding plate is made of a transparent resin.

In an embodiment of the present invention, a multi-color light guiding device is provided, the outer convex portion being a prism.

In an embodiment of the present invention, a multi-color light guiding device is provided, the inner extension being a prism.

In an embodiment of the present invention, a multi-color light guiding device is provided, the outer raised portion being a geometric shape.

In an embodiment of the present invention, a multi-color light guiding device is provided, the inner extension being a geometric shape.

In an embodiment of the present invention, a multi-color light guiding device is provided, further comprising a reflecting member disposed on a bottom surface of the light guiding plate for reflecting light emitted from a bottom surface of the light guiding plate.

In an embodiment of the present invention, a multi-color light guiding device is provided, further comprising a color enhancement contrast member disposed on a bottom surface of the light guide plate.

In an embodiment of the present invention, a multi-color light guiding device is provided, further comprising a trimming member disposed above a top surface of the light guide plate, the trimming plate having a graphic hollow portion for light to pass therethrough.

The multi-colored light guiding device of the present invention has the following effects. The multi-colored light guiding device of the present invention can provide a variety of color effects in a compact structure with a small thickness and a thin thickness, without the need for additional color filters and a large number of light sources. Moreover, with the multi-color light guiding device of the present invention, the user can view different colors at different angles, giving the user a variety of visual feelings.

Embodiments of the present creation will be described below based on Figs. 1 to 4 . The description is not intended to limit the implementation of the present invention, but is one of the embodiments of the present invention.

As shown in FIG. 1 and FIG. 2 , a multi-color light guiding device 100 according to the present invention comprises: a light guiding plate 1 , the side surface of which is a light incident surface 11 and a top surface thereof is a light emitting surface 12 , The light guide plate is formed with a microstructure 2 on the top surface and/or a bottom surface, and the microstructure 2 includes an outwardly convex portion 21 and/or an inwardly extending inner extension portion 22 (shown in FIG. 3). a plurality of illumination sources 3, each of the illumination sources 3 provides light of different colors and emits light corresponding to the light incident surface 11 of the light guide plate 1, and the plurality of illumination sources 3 are arranged at intervals with each other, and the plurality of illumination sources 3 are arranged The emitted light enters the microstructure 2 at different incident angles in the light guide plate, and is refracted and reflected by the microstructure 2 to be emitted from the microstructure 2 to the outside of the light guide plate 1 at a different exit angle to be opposite to the guide. The different viewing angles of the light panel 1 give light of various corresponding colors.

Specifically, the light guide plate 1 is mainly made of a transparent resin having a high light transmittance, and the light guide plate 1 converts the point light source emitted from the plurality of light sources 3 disposed on the side thereof into a surface light source that emits light from the light exit surface 12 . .

In detail, the microstructure 2 can be formed on the light guide plate 1 by techniques such as hot press forming, injection molding, printing molding, and spray molding.

As shown in Figures 1 and 2, in a first embodiment of the present invention, the microstructure 2 includes an outer raised portion 21 formed by the outer surface of the top surface 12. In detail, the outer convex portion 21 is a prism, for example, the outer convex portion 21 is a triangular prism shaped mirror. Of course, the present invention is not limited thereto, and may be replaced by a quadrangular pyramid shape. A mirror, a circular mirror or any other geometric structure.

As shown in Fig. 3, selectively, the microstructure 2 includes an inner extension 22 formed by the top surface 12 extending vertically inwardly toward the bottom surface. In detail, the inner extending portion 22 is a prism. For example, the inner extending portion 22 is a triangular prism shaped mirror. Of course, the present invention is not limited thereto, and may be replaced by a quadrangular pyramid shaped diamond. Mirror or any other geometric structure. It should be noted that the outer protrusion 21 (shown in FIG. 1 ) and the inner extension 22 can be formed in any combination on the light guide plate 1 . For example, the light guide plate 1 can have an outer protrusion 21 extending outward from the top surface and An inner extension 22 extends inwardly from the top.

A multi-color light guiding device 100a according to a second embodiment of the present invention is substantially the same as the multi-color light guiding device 100 of the first embodiment, and the same portions will not be described again. The difference is that the light guide plate 1 is on the bottom surface 13 A microstructure 2a is formed which includes an inner extension 21a extending inwardly from the bottom surface 13 (as in Fig. 4). Optionally, the microstructure 2a includes an outer convex portion 22a formed by the outer surface of the bottom surface 13 (as shown in Fig. 5). It should be noted that the outer convex portion 22a and the inner extending portion 21a may be formed on the light guide plate 1 in any combination. For example, the light guide plate 1 may be formed with an outer convex portion 22a extending outward from the top surface and an inner portion extending inward from the top surface. The extension portion 21a. Of course, the present invention is not limited thereto, and the light guide plate 1 may be formed with an outer convex portion 21 and an inner extending portion 22 on the top surface, and an inner extending portion 21a and an outer convex portion 22a or a guide body formed on the bottom surface. The light plate 1 may also be formed with any combination of two or more of the outer convex portions 21, 22a and the inner extending portions 22, 21a.

As shown in Fig. 1, a plurality of light sources 3 are Light-Emitting Diodes (LEDs). In the present embodiment, a plurality of light source sources 3 are two or more. In detail, the first illumination source emits red light R, the second illumination source emits green light G, and the third illumination source emits blue light B. The plurality of illumination sources 3 respectively have a separation distance d such that the light emitted by the plurality of illumination sources 2 enters the light guide plate 1 at different angles. For example, the plurality of light sources can be arranged in parallel, and the first light source has a separation distance d from the second light source, the second light source, and the third light source (as shown in FIG. 1). Of course, this creation is not limited to this. The position of the light source only needs to enable the light to enter the light guide plate at different angles.

Preferably, the multi-color light guiding device 100 further includes a reflecting member 4 disposed on the bottom surface of the light guiding plate 1 for reflecting the light emitted from the bottom surface of the light guiding plate 1 back to the light guiding plate 1 to continue the total reflection transmission.

Preferably, the multi-color light guiding device 100 further includes a color enhancement contrast member 5 disposed on the bottom surface of the light guide plate 1. The color enhancement contrast member 5 is a dark color plate, that is, the light emitted by the color enhancement contrast member 5 and the plurality of light sources 3 is mutually contrasting colors, and the light emitted by the plurality of light sources 3 is visually more distinct by the contrast effect.

Preferably, the multi-color light guiding device 100 further includes a trimming member 6 disposed above the light emitting surface 12 of the light guide plate 1. The trimming member 6 has a hollow portion 61 whose hollow shape corresponds to the font (or image) presented by the light guiding device 100. For example, as shown in FIG. 6A, the font displayed by the light guiding device 100 is an English letter "A", and the edge thereof is affected by reflection or refraction caused by light entering the light guide plate 1. The edge of the letter "A" is unclear. As shown in Fig. 6B, the trimming member 6 blocks the trimming of the light of the edge of the English letter "A" so that the light is emitted from the hollow portion 61 to give a clearer English letter "A".

In summary, the light emitted by the illuminating source 3 is incident on the convex portion 21 and/or the inner extending portion 22 outside the microstructure 2 at a different incident angle, via the outer convex portion 21 and/or the inner extending portion 22 Refraction and reflection, and exiting outside the light guide plate at different exit angles, allowing the user to view different colors of light when viewed from different viewing angles relative to the light exit surface of the light guide plate, and to make multi-color light guide The device is thinner and simpler than conventional light-emitting devices.

The above description and description are only illustrative of the preferred embodiments of the present invention, and those of ordinary skill in the art may make other modifications in accordance with the scope of the claims as defined below and the description above, but such modifications should still It is the spirit of the creation of this new type and is within the scope of the present invention.

100, 100a‧‧‧ multi-color light guide
1‧‧‧Light guide plate
11‧‧‧Into the glossy surface
12‧‧‧Glossy
13‧‧‧ bottom
2, 2a‧‧‧ microstructure
21, 22a‧‧‧Outer boss
22. Extension within 21a‧‧
3‧‧‧Light source
4‧‧‧reflector
5‧‧‧Color matching contrast
6‧‧‧Trimming parts
61‧‧‧Graphic hollowing out
B‧‧‧Blue
D‧‧‧ separation distance
G‧‧‧Green Light
R‧‧‧Red Light

Fig. 1 is a side view showing a multi-color light guiding device according to a first embodiment of the present invention. Fig. 2 is a plan view showing a multi-color light guiding device according to the first embodiment of the present invention. Fig. 3 is a cross-sectional view showing an inner extending portion of a light-emitting surface of the multi-color light guiding device according to the first embodiment of the present invention. Fig. 4 is a cross-sectional view showing an inner extending portion of a bottom surface of a multi-color light guiding device according to a second embodiment of the present invention. Fig. 5 is a cross-sectional view showing an outer convex portion of the bottom surface of the multi-color light guiding device according to the second embodiment of the present invention. Fig. 6A is a schematic view showing the illumination of the multi-color light guiding device according to the first embodiment of the present invention when it is not trimmed. FIG. 6B is a schematic diagram showing the illumination of the multi-color light guiding device according to the first embodiment of the present invention after trimming.

100‧‧‧Multi-color light guide

1‧‧‧Light guide plate

2‧‧‧Microstructure

3‧‧‧Light source

B‧‧‧Blue

D‧‧‧ separation distance

G‧‧‧Green Light

R‧‧‧Red Light

Claims (9)

A multi-color light guiding device comprises: a light guide plate having a light incident surface and a top surface thereof being a light emitting surface, wherein the light guide plate has a microstructure formed on the top surface and/or a bottom surface, The microstructure includes an outwardly convex portion and/or an inwardly extending inner extension portion; a plurality of illumination sources, each of the illumination sources providing light of different colors and emitting light corresponding to the light guide plate And the plurality of light sources are arranged at an interval from each other, and the light emitted by the plurality of light sources is incident on the microstructure at different incident angles in the light guide plate, and is refracted and reflected by the microstructure And exiting from the microstructure to the outside of the light guide plate at different exit angles to obtain light of various corresponding colors at different viewing angles with respect to the light guide plate. The multi-color light guiding device of claim 1, wherein the light guide plate is made of a transparent resin. The multi-color light guiding device of claim 1, wherein the outer convex portion is a prism. The multi-color light guiding device of claim 1, wherein the inner extension is a prism. The multi-color light guiding device of claim 1, wherein the outer raised portion is a geometric shape. The multi-color light guiding device of claim 1, wherein the inner extension is a geometric shape. The multi-color light guiding device of claim 1, further comprising a reflecting member disposed on a bottom surface of the light guiding plate for reflecting light emitted from a bottom surface of the light guiding plate. The multi-color light guiding device of claim 1, further comprising a color enhancement contrast member disposed on a bottom surface of the light guide plate. The multi-color light guiding device of claim 1, further comprising a trimming member disposed above the top surface of the light guide plate, the trimming plate having a graphic hollow portion for light to pass through.