TWI386589B - Two-color mixing led device - Google Patents

Description

Two-color mixed light LED point light source device

The invention relates to a point light source device, in particular to a two-color mixed light LED point light source device capable of adjusting light color.

LED has the advantages of no mercury, high luminous efficiency, long service life, etc., and has a tendency to gradually replace traditional lighting sources. Although the LED has a high luminous efficiency, the LED single-point light source has a small light-emitting volume, and when used in a large-scale lighting system, multiple LEDs are required to be arrayed into a sufficiently large-area light-emitting unit. However, this method requires The large number of LEDs leads to higher costs, and if a single LED lamp is damaged, the entire column of LEDs will fail, reducing reliability. In the prior art, a three-way microprism optical plate is used to generate a six-fold virtual light source for the LED point light source, so that the number of LEDs is reduced and the cost is saved without affecting the brightness of the light, but usually the LED lighting device is The monochromatic light source can only be used to adjust the brightness and not change the light color, which makes the monochrome LED lighting device unable to emit the appropriate light color.

In view of the above, it is necessary to provide a light source device for a two-color mixed-light LED point source array to increase the brightness of the emitted light, and to emit a light color as needed.

An LED point light source device includes a housing and a microprism optical plate and a circuit substrate fixed in the housing. The microprism optical plate is formed with a plurality of V-shaped ridges extending in three different directions, and the plurality of monochromatic LED point light sources are alternately arranged on the circuit substrate, and the plurality of LED point light sources comprise the first type a first LED point source of color light and a second LED point source emitting a second color of light, the second color of light being different from the first color of light, each of the first LED point source and the second LED point source emitting The light passes through the microprism optical plate to form six virtual light sources, and each of the first LED point light sources is uniformly arranged with three second LED point light sources at a first predetermined value, so that the first LED point light source and the three second color LEDs Among the virtual light sources corresponding to the point source, there are two pairs of overlapping virtual light sources.

The LED point light source device of the invention diffuses the light emitted by the single LED point light source into six virtual light sources and gathers in a specific viewing angle range, increases the brightness of the monochromatic light, and alternates the two-color LED point light sources alternately, so that the two types The virtual light sources of the light colors are superimposed to form a new mixed light color, thereby emitting an appropriate light color.

Referring to FIG. 1, an LED point light source device 100 includes a housing 10, a circuit substrate 20, and a microprism optical plate 30. The housing 10 includes a bottom plate 101, side walls 102 extending along the periphery of the bottom plate 101, and a protective cover 103. The bottom plate 101 and the side wall 102 enclose a receiving cavity. The protective cover 103 is made of one of transparent materials such as transparent glass, frosted glass, and transparent plastic plate. The protective cover 103 is located above the microprism optical plate 30 for protecting the surface layer of the microprism optical plate 30 from contamination or scraping. hurt. In this embodiment, the bottom plate 101 and the side wall 102 may be made of metal or plastic having high reflectivity, or the inner surface may be made of metal or plastic coated with a high reflectivity coating. The microprism optical plate 30 is located within the housing 10 and is positioned above the LED point source 201 and substantially parallel to the bottom plate 101. The circuit substrate 20 is fixed to the bottom plate 101.

Referring to FIG. 2 and FIG. 3, two or more monochromatic LED point light sources 201 are arranged on the surface of the circuit substrate 20. The two or more LED point light sources 201 can emit light of two different colors, and alternate Arranged in an array structure such that the same color LED point light sources 201 are not adjacent to each other and the adjacent two LED point light sources 201 are arranged at a predetermined distance. The light emitted by each of the LED point light sources 201 passes through the microprism optical plate 30 to form six virtual light sources 204. In the present embodiment, the six virtual light sources 204 are evenly distributed on a circumference centered on each of the LED point light sources 201 and having a predetermined value R as a radius. In this embodiment, each of the LED point light sources 202 of the first color in the non-edge position is evenly distributed with three LED color point sources 203 of the second color, and the LED point light sources 202 of each of the first colors and the three The distance of the second color LED point light source 203 is . The arrangement is such that the adjacent first color LED point light source 202 and the virtual light source 204 generated by the second color LED point light source 203 are regularly overlapped, and the overlapping portion forms a mixed light of two light colors to form a new mixed light color. , thus emitting the appropriate light color.

Referring to FIG. 4, in the embodiment, in the two-color LED point source array 21, the virtual light source 204 formed by the outermost LED point source 201 does not mix light, and the area is the non-mixing area 22, and the outermost layer is LED. The virtual light source 204 generated by the other internal LED point light sources 201 surrounded by the point light source 201 forms a complete light mixture, and the area is the light mixing area 23.

Referring to FIG. 5 , the microprism optical plate 30 is made of a transparent plastic material, and has a light incident surface 301 and a light exit surface 302 opposite to the light incident surface 301 . The light incident surface 301 is planar and faces the LED point light source 201 . The illuminating surface 302 is formed with a plurality of V-shaped ridges 303 extending in three different directions, and the plurality of V-shaped ridges 303 extending in the three directions are staggered with each other and have a common connection point.

In the present embodiment, the apex angle of each V-shaped ridge 303 is 45 degrees, and the V-shaped ridge 303 includes a plurality of elongated V-shaped ridges 313 extending in the first direction X1 and a plurality of extending along the second direction X2. a strip-shaped V-shaped ridge 314 and a plurality of elongated V-shaped ridges 315 extending in the third direction X3, wherein the plurality of elongated V-shaped ridges 313 extending in the first direction X1 extend in the second direction X3 The plurality of elongated V-shaped ridges 315 and the plurality of elongated V-shaped ridges 316 extending in the third direction X3 intersect at one point, and the angles θ1 and θ2 between the directions X1, X2 and X3 are both 60 degrees. Further, the elongated V-shaped ridges extending in the symmetry directions X4, X5, and X6 in the X1, X2, and X3 directions and the plurality of elongated V-shaped ridges 313, 314, and 315 form a hexagonal star 322.

In the two-color LED point light source device 100 of the present invention, since a plurality of elongated V-shaped ridges in three directions are disposed on the light-emitting surface 302 of the microprism optical plate 30, the light emitted from the LED point light source 201 passes through the light-emitting surface 302 of the bidirectional V-shaped ridge. Specific refraction, reflection, and the like may occur, thereby diffusing the light emitted by the single LED point source 201 into six virtual light sources 204 and collecting them in a specific viewing angle range, and alternately arranged two-color LED point light sources 201 to make two kinds of light. The virtual light source 204 generated by the color LED point light source 201 is superimposed, and the mixed light of the superimposed portion forms a new mixed light color 205, which ensures the brightness of the light and effectively reduces the number of the LED point light sources 201.

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

100‧‧‧LED point light source device

10‧‧‧shell

101‧‧‧floor

102‧‧‧ side wall

103‧‧‧ protective cover

20‧‧‧ circuit board

201, 202, 203‧‧‧LED point light source

204‧‧‧virtual light source

205‧‧‧mixed light color

21‧‧‧LED point source array

22‧‧‧Non-mixed zone

23‧‧‧Hybrid zone

30‧‧‧Microprism optical plate

301‧‧‧Into the glossy surface

302‧‧‧Glossy

303, 313, 314, 315‧‧‧ V-shaped ridges

322‧‧‧Heights of stars

1 is a schematic cross-sectional view of a two-color mixed light LED point light source device of the present invention.

2 is a schematic diagram of an optical path of the virtual light source generated by the LED point light source of FIG. 1.

FIG. 3 is a schematic diagram of the light mixing of the virtual light source generated by the LED point light sources of the two colors in FIG.

4 is a schematic view of the arrangement of the LED point source arrays of FIG. 1.

FIG. 5 is a schematic perspective view of the microprism optical plate of FIG. 1. FIG.

201, 202, 203‧‧‧LED point light source

204‧‧‧virtual light source

205‧‧‧mixed light color

21‧‧‧LED point source array

Claims (9)

An LED point light source device comprising a housing and a microprism optical plate and a circuit substrate fixed in the housing, wherein the microprism optical plate is formed with a plurality of V-shaped ridges extending in three different directions. Arranging a plurality of monochromatic LED point light sources alternately on the circuit substrate, the plurality of LED point light sources comprising a first LED point light source emitting a first color light and a second LED point light source emitting a second color light, The two color lights are different from the first color light, and the light emitted by each of the first LED point light source and the second LED point light source forms six virtual light sources through the microprism optical plate, and each of the first LED point light sources is first around The predetermined values uniformly align the three second LED point light sources such that the first LED point light source and the three second color LED point light sources correspond to two virtual light sources that overlap. The LED point light source device of claim 1, wherein the microprism optical plate has a light incident surface facing the LED point light source and a light exit surface opposite to the light incident surface, wherein the light incident surface is a plane. A plurality of V-shaped ridges extending in three directions are formed on the light-emitting surface. The LED point light source device of claim 1, wherein the six virtual light sources are evenly distributed on a circumference centered on the first LED point source or the second LED point source and having a radius of a second predetermined value. on. The LED point light source device of claim 1, wherein the first predetermined value is a second predetermined value Times. The LED point light source device of claim 1, wherein the V-shaped ridge comprises a plurality of V-shaped ridges extending in a first direction, a plurality of V-shaped ridges extending in a second direction, and a A plurality of elongated V-shaped ridges extending in three directions, wherein the plurality of elongated V-shaped ridges extending in the first direction, the second direction, and the third direction are staggered with each other and have a common connection point. The LED point light source device of claim 5, wherein an angle formed between the first direction, the second direction, and the third direction is 60 degrees. The LED point light source device of claim 1, wherein the microprism optical plate is made of a transparent plastic material. The LED point light source device of claim 1, wherein the housing comprises a bottom plate and a side wall extending along a circumference of the bottom plate, the bottom plate and the side wall enclosing a receiving cavity, the circuit substrate and the microprism An optical plate is disposed in the receiving cavity, wherein the microprism optical plate is located above the circuit substrate and parallel to the bottom plate. The LED point light source device of claim 1, wherein the LED point light source device further comprises a protective cover made of a transparent material, and the protective cover is fixed above the microprism optical plate.