Illumination device
An illumination device includes the following features. A substrate is located in a shell and stands next to a light outlet of the shell. A plurality of first light sources and second light sources are disposed side by side on the substrate, respectively arranged along a direction on the substrate, and adapted to respectively generate first light beams and second light beams. The second light sources are located between the first light sources and the light outlet. A reflective element is located in the shell and has a first reflective surface and a second reflective surface facing the light outlet. The first reflective surface is located on a side of the substrate far away from the light outlet, and the second reflective surface and the substrate are respectively located on two opposite side edges of the first reflective surface. The second reflective surface is inclined to the first reflective surface.
1 . An illumination device, comprising:
a shell, provided with a light outlet;
a substrate, located in the shell and standing next to the light outlet;
a plurality of first light sources, arranged on the substrate along a direction and adapted to generate a first light beam;
a plurality of second light sources, arranged on the substrate along the direction, wherein the second light sources and the first light sources are arranged side by side on the substrate, the second light sources are located between the first light sources and the light outlet, and the second light sources are adapted to generate a second light beam; and
a reflective element, located in the shell and having a first reflective surface and a second reflective surface, wherein the first reflective surface is located on a side of the substrate opposite to the light outlet, the second reflective surface and the substrate are respectively located on two opposite side edges of the first reflective surface, the first reflective surface and the second reflective surface face the light outlet, the second reflective surface is inclined relative to the first reflective surface, the first light sources and the second light sources are together located in an accommodation space formed by the substrate and the reflective element, the first reflective surface is adapted to reflect a chief ray of the first light beam to the light outlet, and the second reflective surface is adapted to reflect a chief ray of the second light beam to the light outlet;
wherein a shortest distance between the first light source and the light outlet is greater than a shortest distance between the second light source and the light outlet;
wherein each of the first light sources has a top surface facing away from the substrate, and the first reflective surface overlaps each of the first light sources in a normal direction of each of the top surfaces of the first light sources;
wherein each of the second light sources has a top surface facing away from the substrate, and the second reflective surface totally overlaps each of the second light sources in a normal direction of each of the top surfaces of the second light sources.
2 . The illumination device according to claim 1 , wherein the substrate has a first side and a second side, the first side is opposite to the second side, the second side is fixed next to the light outlet, the first light sources and the second light sources are located between the first side and the second side, and an angle between the direction and a side edge of the second side is 0° to 10°.
3 . The illumination device according to claim 1 , wherein the second reflective surface has a first edge and a second edge, the first edge is opposite to the second edge, the first edge is connected to a side of the first reflective surface far away opposite to the substrate, the second edge is connected to the shell, and the second edge and the substrate are located on two opposite sides of the light outlet.
4 . The illumination device according to claim 1 , wherein the second reflective surface has a first edge and a second edge that are opposite to each other, the first reflective surface has a third edge and a fourth edge that are opposite to each other, the first edge is connected to the fourth edge, the third edge is connected to the substrate, the first reflective surface has a first width between the third edge and the fourth edge, the second reflective surface has a second width between the first edge and the second edge, and the first width is smaller than the second width.
5 . The illumination device according to claim 1 , wherein the first light sources and the second light sources are disposed on a surface of the substrate, a first angle is formed between the first reflective surface and a normal direction of the surface, a second angle is formed between the second reflective surface and the normal direction of the surface, and the first angle is smaller than the second angle.
6 . The illumination device according to claim 5 , wherein the first angle is between 0° and 50°.
7 . The illumination device according to claim 5 , wherein the second angle is between 0° and 65°.
8 . The illumination device according to claim 1 , wherein the first reflective surface and the second reflective surface each comprise a plane.
9 . The illumination device according to claim 1 , wherein the first light sources and the second light sources are disposed on a surface of the substrate, and the surface comprises a reflective surface.
10 . The illumination device according to claim 1 , further comprising a light transmission plate, wherein the light transmission plate is disposed at the light outlet of the shell.
11 . The illumination device according to claim 1 , wherein the first light beams and the second light beams are adapted to illuminate a reference surface after emitting through the light outlet, and a distance between a center point of the first light beam in an illumination region of the reference surface and the light outlet is greater than a distance between a center point of the second light beam in the illumination region of the reference surface and the light outlet.