TWI635325B - Light source module - Google Patents

Abstract

A light source module includes a reflective structure, an optical film, and a light source. The reflective structure has a groove. The groove includes a convex bottom surface and a first side and a second side opposite to the bottom surface and opposite to each other. The optical film is located above the groove. The light source is located between the recess and the optical film.

Description

Light source module

The invention relates to a light source module, and in particular to a light source module with a reflective structure.

With the progress of the times, the characteristics of light, thin, short, and small have gradually become the primary conditions for consumers to choose products. In some products with display or illumination functions, the light source module occupies a large volume. Therefore, in order to reduce the size of the product, many R&D teams are currently working on the development of related technologies for reducing the light source module.

In the light source module, in order to achieve uniform uniformity of light emitted by each light source (for example, a light-emitting diode), it is often necessary to reserve a section between the light source and the optical film. Optical distance (OD). The light mixing distance provides sufficient space for the light from adjacent sources to mix with each other. However, in the case where the light source does not use other external optical elements, such as a second lens, in order to improve surface uniformity, the light source module must increase the light mixing distance. However, as the light mixing distance of the light source module increases, the thickness of the display module also increases. Therefore, there is a need for a method for reducing the light mixing distance of the light source module and maintaining the uniformity of light.

The invention provides a light source module capable of reducing the light mixing distance and maintaining the uniformity of the surface of the light.

The light source module of the invention comprises a reflective structure, an optical film and a light source. The reflective structure has a groove. The groove includes a convex bottom surface and a first side and a second side opposite to the bottom surface and opposite to each other. The optical film is located above the groove. The light source is located between the recess and the optical film.

In at least one embodiment of the present invention, the reflective structure of the light source module can reflect the light beam emitted by the light source, and can improve the uniformity of the light and reduce the light mixing distance. Therefore, the size of the light source module can be reduced.

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

FIG. 1A is a top plan view of a light source module 10 according to an embodiment of the invention. FIG. 1B is a perspective view of the light source module 10 of FIG. 1A, wherein FIG. 1B omits the support structure 110 of FIG. 1A. 1C and 1D are schematic cross-sectional views taken along line AA' of Fig. 1B.

Referring to FIG. 1A to FIG. 1D , the light source module 10 includes a reflective structure 100 , an optical film OF and a light source L. In some embodiments, a display panel can be disposed on the light source module 10.

In some embodiments, light source L includes a light emitting diode or other similar light emitting element. The light source L can emit white light or a single wavelength of light (for example, ultraviolet light, blue light, red light, green light, yellow light, or other wavelengths of light).

The reflective structure 100 has a plurality of grooves OP. In the present embodiment, the orthographic shape of the opening of the groove OP is a regular hexagon (for example, a shape projected onto the optical film OF), and the side length W of the regular hexagon is 1 mm to 100 mm, but the present invention Not limited to this. In some embodiments, the orthographic shape of the opening of the groove OP is a polygonal shape such as a rectangle, a hexagon, an octagon, a decagon, or a dodecagonal. The light source L is located in the groove OP. The groove OP includes a convex bottom surface BS and side surfaces SW connected to the bottom surface BS (for example, oppositely disposed first side SW1 and second side SW2). In the present embodiment, the bottom surface BS includes six triangular convex surfaces, each triangular convex surface is connected to the other two adjacent triangular convex surfaces and one side SW, and each side SW is connected to the other two adjacent side SWs And a triangular convex surface. In some embodiments, the bottom surface BS includes only one convex surface, and one convex surface is coupled to the plurality of side surfaces SW. The orthographic projection of the light source L on the reflective structure 100 is for example located at the center of the bottom surface BS of the recess OP. The first side SW1 and the second side SW2 of the groove OP include a curved surface or a flat surface or a free smooth surface (Spline surface). In this embodiment, the first side surface SW1 and the second side surface SW2 are concave surfaces, and the concave surface faces the light source L, but the invention is not limited thereto. In other embodiments, the first side SW1 and the second side SW2 are planar or convex. In some embodiments, the thickness H1 of the reflective structure 100 is between 100 nanometers and 150 millimeters.

The support structure 110 is mounted on the recess OP of the reflective structure 100. The light source L is disposed on the support structure 110 and suspended in the groove OP or above the groove OP. The light source L is located between the support structure 110 and the reflective structure 100. The light emitting surface ES of the light source L faces the reflective structure 100, and the distance H2 from the reflective structure 100 is, for example, between 0.1 mm and 200 mm. The light beam emitted from the light source L is reflected by the bottom surface BS of the groove OP and the side surface SW.

In some embodiments, the support structure 110 has wires or other electronic components electrically connected to the light source L, and wires or other electronic components on the support structure 110 can be used to control the brightness or switching of the light source L.

In some embodiments, the support structure 110 is zigzag, linear, mesh, or other shape, such as an irregular shape. In the present embodiment, the support structure 110 is zigzag and the support structure 110 does not completely cover the opening of the recess OP. In this embodiment, the support structure 110 has a plurality of turning portions T, each of which is located at the intersection of the three reflective structures 100. The three reflecting structures 100 support one turning portion T, so that the supporting structure 110 can be further Stabilize and maintain the position of the light source L. In some embodiments, the support structure 110 is fixed to the reflective structure 100 by a fixing member SS (for example, a screw, a nail, a support column of a transparent material, or the like), and the fixing member SS may be located at the support structure 110. The turning portion T or other location on the support structure 110. In some embodiments, the width W1 of the support structure 110 is, for example, between 1 mm and 4 mm. Although the support structure 110 has an equal width in this embodiment, the invention is not limited thereto. In other embodiments, the support structure 110 may have a wider width at a portion that connects the light sources L, and a portion that is not connected to the light source L may have a narrower width, or the width may also be a gradual adjustment.

In some embodiments, the support structure 110 is made of polymethyl methacrylate (PMMA), polycarbonate (PC), glass, metal or other reflective material or a combination of the above. In some embodiments, the surface of the support structure 110 is provided with a layer of highly reflective material, such as silver, aluminum, gold or other metal, so that the support structure 110 can reflect the light beam emitted by the light source L, or the support structure 110 itself is Highly reflective material. In some embodiments, the support structure 110 is a transparent material such as transparent glass, patterned indium tin oxide (ITO) or transparent polymer material (such as polyamide, ethylene-tetrafluoroethylene polyester). (ETFE), polyethylene terephthalate (PET), polymethyl methacrylate (PMMA) or polycarbonate (PC), etc., even if the support structure 110 completely obscures the groove OP, the beam remains It can pass through the support structure 110 and exit from the groove OP.

The optical film OF is located above the groove OP, and the optical film OF is, for example, a Quantum Dot Enhancement Film (QDEF), a phosphor film, a Diffuser film, or a Light Guide film. , Prism film, Dual Brightness Enhancement Film (DBEF), Diffraction film or other optical film or a combination of the above optical films.

1C is an optical path diagram of an embodiment of the present invention. It should be noted that although FIG. 1C only illustrates the first light beam E1 and the second light beam E2, the light source L of the present invention does not actually only emit the first light. The light beam E1 and the second light beam E2, the light source L of the present invention actually emits an infinite number of light beams, and FIG. 1C only shows an optical path diagram of two of the light beams.

Referring to FIG. 1C, the light source L emits a first light beam E1 and a second light beam E2 that are symmetric with each other. The first light beam E1 reaches the point A' on the bottom surface BS and is reflected to the point A on the first side surface SW1. The second light beam E2 reaches a point C' on the bottom surface BS and is reflected to a point C on the first side surface SW1. The first light beam E1 is reflected at a point A on the first side SW1 and reaches a point B on the optical film OF. The second light beam E2 is reflected at a point C on the second side SW2 and reaches a point D on the optical film OF. The opening width of the groove OP is larger than the line distance between the point B and the point D. The first beam E1 and the second beam E2 have an intersection E. Point A, point C, and intersection E constitute a first triangle ACE. Point B, point D, and intersection E constitute a second triangle BDE, and the area of the first triangle ACE is greater than or equal to the area of the second triangle BDE.

1D is another optical path diagram of an embodiment of the present invention. It should be noted that although FIG. 1D only shows the first light beam E1 and the second light beam E2, the light source L of the present invention does not actually only emit the first light. A light beam E1 and a second light beam E2, the light source L of the present invention actually emits an infinite number of light beams, and FIG. 1D only shows an optical path diagram of two of the light beams.

Referring to FIG. 1D, the light source L emits a first light beam E1 and a second light beam E2 that are symmetric with each other. The first light beam E1 is reflected at a point A on the first side SW1 and reaches a point B on the optical film OF. The second light beam E2 is reflected at a point C on the second side SW2 and reaches a point D on the optical film OF. The width of the groove OP is greater than the line distance between the point B and the point D. The first beam E1 and the second beam E2 have an intersection E. Point A, point C, and intersection E constitute a first triangle ACE. Point B, point D, and intersection E constitute a second triangle BDE, and the area of the first triangle ACE is greater than or equal to the area of the second triangle BDE.

Referring to FIG. 1C and FIG. 1D simultaneously, the linear distance between the support structure 110 and the optical film OF is the distance L1, and the distance L1 is about the optical distance (OD) of the light source module 10, the intersection point E and the optical film OF. The straight line distance between them is the distance L2, the distance L1 is greater than or equal to the distance L2, and the distance L1 is greater than zero. In an embodiment, the distance L1 is approximately equal to 0.1 to 0.5 times the distance P between the adjacent two light sources L, depending on the stacking structure of the optical film OF and the viewing angle of the light source L.

In some embodiments, the light source module has a plurality of dimming zones, each of which corresponds to one light source L and one recess OP, but the invention is not limited thereto. In other embodiments, each dimming zone corresponds to more than one light source L and more than one recess OP.

Based on the above, the reflective structure 100 can adjust the incident angle and intensity of the light beam emitted from the light source L into the optical film OF, and the light beams of different optical paths are mixed with each other, thereby improving the surface uniformity of the light source module. In addition, the light source module of the embodiment can reduce the light mixing distance and obtain a high uniformity light mixing effect, so that the thickness of the light source module can be reduced.

FIG. 2 is a perspective view of a light source module 20 according to an embodiment of the invention. It should be noted that the embodiment of FIG. 2 follows the component numbers and parts of the embodiment of FIG. 1A to FIG. 1D, wherein the same or similar elements are used to denote the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted part, reference may be made to the foregoing embodiment, and details are not described herein.

In the embodiment of Figures 1A-1D, the support structure 110 exposes a majority of the grooves OP. In the embodiment of Figure 2, the support structure 210 completely covers the recess OP.

Referring to FIG. 2B , in the embodiment, the support structure 210 is a transparent material, and the support structure 210 shields the groove OP, and the support structure 210 covers the entire groove OP, for example. In this embodiment, more light sources L may be disposed on the same support structure 210. Therefore, the support structure 210 in the light source module 20 can have a small number, and the number of fixing members (not shown) for fixing the support structure 210 can also be less, and the support structure 210 can also be used by the light source module. The function of other machine components (such as plastic frame or iron frame) to support. In some embodiments, a display panel can be disposed on the light source module 20.

3 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. It should be noted that the embodiment of FIG. 3 follows the component numbers and parts of the embodiment of FIG. 1A to FIG. 1D, wherein the same or similar elements are used to denote the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted part, reference may be made to the foregoing embodiment, and details are not described herein.

In the present embodiment, the reflective structure 200 has a groove OP, and the orthographic projection shape of the groove OP is a rectangle (for example, a shape projected onto the optical film), for example, a square, and the side length of the rectangle is 1 mm to 100 mm. . The groove OP includes a convex bottom surface BS and a side surface SW connecting the bottom surface BS. In the present embodiment, the bottom surface BS includes four triangular convex surfaces, each triangular convex surface is connected to the other two adjacent triangular convex surfaces and one side SW, and each side SW is connected to the other two adjacent side SWs And a triangular convex surface.

Although the reflective structure 200 of FIG. 3 has only one recess OP, the invention is not limited thereto. In fact, the reflective structure 200 can have a plurality of grooves OP whose orthographic projections are rectangular.

The reflection structure 200 can adjust the incident angle and intensity of the light beam emitted from the light source L into the optical film OF, and the light beams of different optical paths are mixed with each other to improve the uniformity of the light. In addition, the light source module of the embodiment can reduce the light mixing distance and obtain an excellent light mixing effect, so that the thickness of the light source module can be reduced.

4 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. It should be noted that the embodiment of FIG. 4 follows the component numbers and parts of the embodiment of FIG. 1A to FIG. 1D, wherein the same or similar elements are used to denote the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted part, reference may be made to the foregoing embodiment, and details are not described herein.

In the present embodiment, the reflective structure 300 has a groove OP, and the orthographic shape of the groove OP is an octagonal shape (for example, a shape projected onto the optical film), for example, a regular octagon, and the side length of the octagon It is from 1 mm to 100 mm. The groove OP includes a convex bottom surface BS and a side surface SW connecting the bottom surface BS. In the present embodiment, the bottom surface BS includes eight triangular convex surfaces, each triangular convex surface is connected to the other two adjacent triangular convex surfaces and one side SW, and each side SW is connected to the other two adjacent side SWs And a triangular convex surface.

Although the reflective structure 300 of FIG. 4 has only one recess OP, the invention is not limited thereto. In fact, the reflective structure 300 can have a plurality of grooves OP having an orthographic shape that is octagonal.

The reflective structure 300 can adjust the incident angle of the light beam emitted from the light source L into the optical film OF, and the light beams of different optical paths are mixed with each other to improve the uniformity of the light. In addition, the light source module of the embodiment can obtain an excellent light mixing effect without requiring a large light mixing distance, and thus the thickness of the light source module can be reduced.

FIG. 5 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. It should be noted that the embodiment of FIG. 5 follows the component numbers and parts of the embodiment of FIG. 1A to FIG. 1D, wherein the same or similar elements are used to denote the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted part, reference may be made to the foregoing embodiment, and details are not described herein.

In the present embodiment, the reflective structure 400 has a groove OP, and the orthographic shape of the groove OP is a decagon (for example, a shape projected onto the optical film), for example, a regular decagon, and a decagon edge It is from 1 mm to 100 mm long. The groove OP includes a convex bottom surface BS and a side surface SW connecting the bottom surface BS. In the present embodiment, the bottom surface BS includes ten triangular convex surfaces, each triangular convex surface is connected to the other two adjacent triangular convex surfaces and one side SW, and each side SW is connected to the other two adjacent side SWs. And a triangular convex surface.

Although the reflective structure 400 of FIG. 5 has only one recess OP, the invention is not limited thereto. In fact, the reflective structure 400 can have a plurality of grooves OP having a forward projection shape that is a decagon.

The reflective structure 400 can adjust the incident angle of the light beam emitted from the light source L into the optical film OF, and the light beams of different optical paths are mixed with each other to improve the uniformity of the light. In addition, the light source module of the embodiment can obtain an excellent light mixing effect without requiring a large light mixing distance, and thus the thickness of the light source module can be reduced.

6 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. It should be noted that the embodiment of FIG. 6 follows the component numbers and parts of the embodiment of FIG. 1A to FIG. 1D, wherein the same or similar elements are used to denote the same or similar elements, and the same technical content is omitted. Description. For the description of the omitted part, reference may be made to the foregoing embodiment, and details are not described herein.

In the present embodiment, the reflective structure 500 has a groove OP, and the orthographic shape of the groove OP is a dodecagonal shape (for example, a shape projected onto the optical film), for example, a regular dodecagon, and twelve sides The sides of the shape are from 1 mm to 100 mm. The groove OP includes a convex bottom surface BS and a side surface SW connecting the bottom surface BS. In this embodiment, the bottom surface BS includes twelve triangular convex surfaces, each triangular convex surface is connected to the other two adjacent triangular convex surfaces and one side SW, and each side SW is connected to the other two adjacent sides. SW and a convex face of a triangle.

Although the reflective structure 500 of FIG. 6 has only one recess OP, the invention is not limited thereto. In fact, the reflective structure 500 can have a plurality of grooves OP having a dodecagonal shape that is dodecagonal.

The reflective structure 500 can adjust the incident angle of the light beam emitted from the light source L into the optical film OF, and the light beams of different optical paths are mixed with each other to improve the uniformity of the light. In addition, the light source module of the embodiment can obtain an excellent light mixing effect without requiring a large light mixing distance, and thus the thickness of the light source module can be reduced.

In at least one embodiment of the present invention, the light source module includes a reflective structure, and the reflective structure can adjust an incident angle of the light beam emitted by the light source into the optical film, and the light beams of the different light paths are mixed with each other to improve the uniformity of the light.

In at least one embodiment of the present invention, the light source module can obtain an excellent light mixing effect without requiring a large light mixing distance, and thus the thickness of the light source module can be reduced.

In at least one embodiment of the present invention, the support structure is a transparent material, and more light sources can be disposed on the same support structure, which can reduce the number of support structures in the light source module.

In at least one embodiment of the present invention, the reflective structure of the light source module may be a hybrid combination, for example, a dodecagonal reflective structure 500 and a decagon shaped reflective structure 400 are mixed, but not limited thereto.

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

10, 20‧‧‧Light source module
100, 200, 300, 400, 500‧‧‧ reflective structures
110, 210‧‧‧Support structure
A, A', B, C, C', D‧‧ points
BS‧‧‧ bottom
E‧‧‧ intersection
E1‧‧‧First beam
E2‧‧‧second beam
ES‧‧‧Lighting surface
H1‧‧‧ thickness
H2, L1, L2, P‧‧‧ distance
L‧‧‧Light source
OF‧‧‧Optical film
OP‧‧‧ Groove
SS‧‧‧Fixed components
SW‧‧‧ side
SW1‧‧‧ first side
SW2‧‧‧ second side
T‧‧‧ turning section
W1‧‧‧Width

FIG. 1A is a top plan view of a light source module according to an embodiment of the invention. FIG. 1B is a perspective view of the light source module of FIG. 1A. 1C and 1D are schematic cross-sectional views taken along line AA' of Fig. 1B. 2 is a perspective view of a light source module in accordance with an embodiment of the invention. 3 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. 4 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. FIG. 5 is a perspective view of a reflective structure in accordance with an embodiment of the present invention. 6 is a perspective view of a reflective structure in accordance with an embodiment of the present invention.

Claims (11)

A light source module includes: a reflective structure having a recess, wherein the recess includes a bottom surface of the protrusion and a first side and a second side opposite to the bottom surface; an optical film located in the recess Above the slot; and a light source between the recess and the optical film. The light source module of claim 1, wherein the light source emits a first light beam and a second light beam that are symmetric with each other, wherein: the first light beam reflects at a point A on the first side and reaches the optical film. Point B above, the second beam is reflected at a point C on the second side and reaches a point D on the optical film, the first beam having an intersection E with the second beam, the point A, the point C and The intersection E constitutes a first triangle, the point B, the point D and the intersection E form a second triangle, and the area of the first triangle is greater than or equal to the area of the second triangle. The light source module of claim 2, wherein the first light beam emitted by the light source and the second light beam are reflected by the bottom surface of the groove. The light source module of claim 2, further comprising: a support structure disposed on the groove of the reflective structure, the light source being disposed on the support structure, between the support structure and the optical film The linear distance is L1, and the linear distance between the intersection E and the optical film is L2, where L1 is greater than or equal to L2, and L1 is greater than zero. The light source module of claim 2, wherein a width of the groove is greater than a line distance between the point B and the point D. The light source module of claim 1, wherein the light emitting surface of the light source faces the reflective structure. The light source module of claim 1, further comprising: a support structure disposed on the groove of the reflective structure, wherein the light source is disposed on the support structure. The light source module of claim 7, wherein the material of the support structure comprises a transparent material. The light source module of claim 1, wherein the orthographic projection shape of the groove comprises a rectangle, a hexagon, an octagon, a decagon or a dodecagonal. The light source module of claim 1, wherein the first side and the second side of the groove comprise a curved surface. The light source module of claim 1, wherein the orthographic projection of the light source is located at a center of the bottom surface of the groove.