TWI576540B - Lighting device - Google Patents

Description

Lighting device

The present invention relates to an illumination device, and more particularly to an illumination device having a diffractive optical element.

In current lighting devices, in order to make the light uniform or to produce a specific pattern, a matte lamp housing or an integrally formed patterned lamp housing is often used. Matte lamp housings are typically used in general household or office lighting, while integrally formed patterned lamp housings are commonly found in automotive lights to provide specific stripes or geometric patterns.

However, the matte lamp housing has a poor light extraction efficiency, and the integrally formed patterned lamp housing does not provide a uniform visual pattern. The observer can easily see a plurality of separate light sources through the integrally formed patterned lamp housing.

In order to solve the aforementioned problems, we need a novel lighting device.

It is an object of the present invention to disclose an illumination device that provides a uniform line of display pattern by at least one diffractive optical element.

Another object of the present invention is to disclose an illumination device that provides a three-dimensional display pattern by at least one diffractive optical element.

Another object of the present invention is to disclose a lighting device which can be at least A diffractive optical element saves the number of light sources.

To achieve the above object, an illumination device is provided having: a light source assembly having a plurality of first light sources and at least one diffractive optical element, wherein the at least one diffractive optical element forms a diffraction pattern a pattern, the at least one diffractive optical element each having a light incident side and a light exiting side, and the plurality of first light sources provide incident light to the light incident side of the at least one diffractive optical element; a lamp housing that receives light emitted by the light exiting side of the at least one diffractive optical element.

In one embodiment, the plurality of first light sources are LED (light emitting diode) or OLED (organic light emitting diode) or PLED (polymer light emitting diode; Organic light-emitting diode).

In an embodiment, the plurality of first light sources have a single package or a plurality of packages.

In an embodiment, the plurality of first light sources have the same color light or different color lights.

In one embodiment, the plurality of first light sources have an optical conversion member and at least one second light source, and the at least one second light source is located on at least one side of the optical conversion member.

In an embodiment, the plurality of first light sources are in the same plane or different planes.

In an embodiment, the plurality of first light sources have a plurality of optical axis directions.

In an embodiment, the diffractive optical element is a transparent or translucent optical element.

In one embodiment, the diffractive optical element is made of glass, PC (polycarbonate), PMMA (polymethyl methacrylate), COP (cyclo olefin polymers), ABS ( A material selected from the group consisting of acrylonitrile butadiene styrene; acrylonitrile butadiene styrene, and any combination of the foregoing.

In order to achieve the above object, another illumination device is proposed having: a light source assembly having a plurality of first light sources and an array of diffractive optical elements, wherein the array of diffractive optical elements has a plurality of diffractions The optical element is formed to form a diffraction pattern, the plurality of diffractive optical elements each having a light incident side and a light exiting side, and the plurality of first light sources provide incident light to the plurality of diffractive optical elements The light incident side; and a lamp housing that receives light emitted by the light exiting side of the plurality of diffractive optical elements.

The detailed description of the drawings and the preferred embodiments are set forth in the accompanying drawings.

10‧‧‧Light source module

11‧‧‧Diffractive optical components

12‧‧‧Light shell

10a‧‧‧first light source

11a‧‧‧light side

11b‧‧‧light side

13‧‧‧Optical converter

13a‧‧‧Lighting area

14‧‧‧Second light source

15‧‧‧Reflecting parts

1 is a schematic exploded view of an embodiment of a lighting device of the present invention.

2 is a schematic view showing the combination of the lighting device of FIG. 1.

3 is a schematic view showing a stripe pattern generated by the illumination device of FIG. 2 when illuminated.

4 is a schematic diagram of a plurality of first light sources of the light source module of FIG. 1 not in the same plane.

FIG. 5 is a schematic diagram of a plurality of first light sources of the light source module of FIG. 1 having two optical axis directions.

Figure 6 is a schematic exploded view of another embodiment of the lighting device of the present invention.

Figure 7 is a schematic illustration of an illumination device of the present invention provided with an array of diffractive optical elements comprised of a plurality of diffractive optical elements.

Please refer to FIG. 1, which is a schematic exploded view of an embodiment of a lighting device of the present invention. As shown in FIG. 1, the lighting device has a light source module 10, a diffractive optical element 11, and a lamp housing 12.

The light source module 10 has a plurality of first light sources 10a, and the first light source 10a may be composed of an LED or an OLED or a PLED. The plurality of first light sources 10a may have a single package or a plurality of packages, and the plurality of first light sources 10a may have the same color light or different color lights.

The diffractive optical element 11 is a transparent or translucent optical element and may be made of a material selected from the group consisting of glass, PC, PMMA, COP, ABS, and any combination of the foregoing. The diffractive optical element 11 and the plurality of first light sources 10a form a light source assembly, wherein the diffractive optical element 11 has a diffraction pattern, a light incident side 11a, and a light exit side 11b, and the plurality of The first light source 10a supplies incident light to the light incident side 11a of the diffractive optical element 11. The diffractive optical element 11 allows the viewer to see a uniform stripe pattern, geometric pattern, number, or text symbol at a distance from the light exit side 11b by the diffraction pattern on its surface.

The lamp housing 12 is for receiving light emitted by the light exiting side 11b of the diffractive optical element 11. The lamp housing 12 can be a curved lamp housing or a flat lamp housing.

At the time of illumination, due to the diffraction effect of the diffractive optical element 11, the viewer will see a slightly curved pattern of the pattern seen from the front side at an angle deviating from the front side. Accordingly, the illumination device of the present invention provides a stereoscopic pattern display effect.

Please refer to FIG. 2 , which is a schematic diagram of the combination of the lighting device of FIG. 1 . Please refer to FIG. 3 , which is a schematic diagram of a stripe pattern generated by the illumination device of FIG. 2 when illuminated. As shown in FIG. 3, the stripe pattern produced by the illumination device is a uniform stripe pattern with a three-dimensional effect.

In addition, the plurality of first light sources 10a of the light source module 10 may be located in the same plane or not in the same plane. Please refer to FIG. 4 , which is a schematic diagram of a plurality of first light sources 10 a of the light source module 10 not in the same plane. When the plurality of first light sources 10a are not in the same plane, the illumination device of the present invention can further enhance the stereoscopic effect of the display pattern thereof.

In addition, the plurality of first light sources 10a of the light source module 10 may have a plurality of optical axis directions. Please refer to FIG. 5 , which is a schematic diagram of a plurality of first light sources 10 a of the light source module 10 having two optical axis directions. Accordingly, the illumination device of the present invention can provide two different display patterns.

In addition, the plurality of first light sources 10a of the light source module 10 can also be indirectly generated by an optical conversion member. Please refer to FIG. 6, which is a schematic exploded view of another embodiment of the lighting device of the present invention. As shown in FIG. 6, the light source module 10 of the illumination device has an optical conversion member 13, a plurality of second light sources 14, and a reflection member 15.

The optical conversion member 13 can be composed of a light guide plate having two sides, a light exiting surface, and a back surface. The two sides are respectively provided with two second light sources 14 (at least one second light source 14 may be disposed on a single side), and the light exiting surface has a plurality of light exiting regions 13a to provide the plurality of first portions. Light source 10a.

The plurality of second light sources 14 may be comprised of LEDs or OLEDs or PLEDs.

The reflector 15 can be constructed of, for example, but not limited to, a metal to provide a light reflecting function.

In addition, the illumination device of the present invention may also be provided with an array of diffractive optical elements for For more complex display patterns. Please refer to FIG. 7, which is a schematic diagram of a lighting device of the present invention provided with an array of diffractive optical elements composed of a plurality of diffractive optical elements. As shown in FIG. 7, the diffractive optical element labeled A has a first diffractive pattern to create a vertical stripe display pattern, and the diffractive optical element labeled B has a second diffractive pattern to produce a horizontal Stripe display pattern. That is, by forming the plurality of diffractive optical elements into a diffraction pattern combination, the illumination device of the present invention allows the viewer to see a character or a digital symbol when illuminated.

As can be seen from the above description, the present invention has the following advantages due to its novel design:

1. The illumination device of the present invention provides a uniform line of display pattern by at least one diffractive optical element.

2. The illumination device of the present invention can provide a three-dimensional display pattern by at least one diffractive optical element.

3. The illumination device of the present invention can save the number of light sources by at least one diffractive optical element.

The disclosure of the present invention is a preferred embodiment. Any change or modification of the present invention originating from the technical idea of the present invention and being easily inferred by those skilled in the art will not deviate from the scope of patent rights of the present invention.

In summary, this case, regardless of its purpose, means and efficacy, is showing its technical characteristics that are different from the conventional ones, and its first invention is practical and practical, and it is also in compliance with the patent requirements of the invention. I will be granted a patent at an early date.

10‧‧‧Light source module

11‧‧‧Diffractive optical components

12‧‧‧Light shell

10a‧‧‧first light source

11a‧‧‧light side

11b‧‧‧light side

Claims (10)

A lighting device having: a light source assembly having a plurality of first light sources and a diffractive optical element, wherein the diffractive optical element forms a diffraction pattern, and the diffractive optical element has an incoming light a side and a light exiting side, and the plurality of first light sources provide incident light to the light incident side of the diffractive optical element; and a lamp housing received by the light exiting side of the diffractive optical element a light emitted by the diffractive optical element, wherein the diffraction pattern allows the viewer to view a three-dimensional display pattern at a distance from the light exiting side, the display pattern being a pattern selected from the group consisting of a striped pattern, a geometric pattern, a number, and a text symbol, and the display pattern corresponds to an aligned pattern of the plurality of first light sources. The lighting device of claim 1, wherein the plurality of first light sources are composed of LEDs or OLEDs or PLEDs. The illuminating device of claim 1, wherein the plurality of first light sources have a single package or a plurality of packages. The illumination device of claim 1, wherein the plurality of first light sources have the same color light or different color lights. The illuminating device of claim 1, wherein the plurality of first light sources have an optical conversion member and at least one second light source, and the at least one second light source is located on at least one side of the optical conversion member And the optical conversion member is a light guide plate. The illuminating device of claim 1, wherein the plurality of first light sources are in the same plane or different planes. The illumination device of claim 1, wherein the plurality of first light sources have a plurality of optical axis directions. The illuminating device of claim 1, wherein the diffractive optical element is a transparent or translucent optical element. The illuminating device of claim 1, wherein the diffractive optical element is glass, polycarbonate, polymethyl acrylate, cycloolefin polymer, acrylonitrile-butadiene-styrene, and the foregoing Made of a material selected by a group consisting of any combination. A lighting device having: a light source assembly having a plurality of first light sources and an array of diffractive optical elements, wherein the array of diffractive optical elements has a plurality of diffractive optical elements to form a diffraction pattern combination, The plurality of diffractive optical elements each have a light incident side and a light exiting side, and the plurality of first light sources provide incident light to the light incident side of the plurality of diffractive optical elements; and a lamp housing Receiving light emitted by the light exiting side of the plurality of diffractive optical elements; wherein the array of diffractive optical elements is such that the diffraction pattern combination causes the viewer to be at a distance from the light exiting side A stereoscopic display pattern is viewed at a distance, the display pattern being a selected one of a group consisting of a striped pattern, a geometric pattern, a number, and a text symbol, and the display pattern is An arrangement pattern of a plurality of first light sources corresponds to each other.