TWM512674U - Beam control element - Google Patents

Description

Beam control element

This creation relates to a beam steering element, particularly to a wide-angle beam steering element.

As an emerging light source, light-emitting diodes have been widely used in various applications, especially as backlight modules for displays. Conventional backlight modules are generally composed of a plurality of light-emitting diodes arranged in an array, and the light emitted by each of the light-emitting diodes is mixed with each other to illuminate the display panel. However, since the illumination range of each of the light-emitting diodes is small, in order to illuminate the display panel having a large area, the backlight module needs to use a large number of light-emitting diodes, resulting in a high overall cost. Therefore, in order to reduce the number of use of the light-emitting diodes, the light-emitting diodes are usually used in conjunction with lenses. The lens diffuses the light from the light-emitting diode to achieve a wide range of illumination effects. However, with the improvement of the quality of life requirements, the thinning requirements of the backlight module are becoming higher and higher. How to effectively reduce the thickness of the backlight module while still maintaining the uniform light distribution of the backlight module has been urgently solved by the industry. The subject.

The main purpose of this creation is to provide a wide-angle beam control element that, when applied to a backlight module, can effectively reduce the thickness of the backlight module while still maintaining a uniform light distribution of the backlight module.

To achieve the above objectives, the present invention provides a beam steering element including a central axis, a bottom surface, a light exiting surface, and a light incident surface. The bottom surface is symmetrical to the central axis. The light-emitting surface includes a light-emitting surface, a cylindrical side surface, and a concave surface, and the light-emitting surface is symmetrical to the central axis. The side of the cylinder surrounds the central axis and is symmetrical to the central axis, and the sides of the cylinder are connected to the curved surface. The concave surface is symmetrical to the central axis and is connected to the side of the cylinder, and the concave surface is a concave curved reflecting surface. The light incident surface includes a top surface and an inner side surface, the top surface is symmetric with respect to the central axis, and the top surface protrudes toward the bottom surface. The inner side surface surrounds the central axis and is symmetrical with respect to the central axis, and the inner side surface is connected to the bottom surface and is concavely converged toward the light exiting surface, and is connected to the top surface at the end of the converging end.

In an embodiment of the present invention, the light surface is a free surface, an elliptical surface, a spherical surface or a paraboloid.

In one embodiment of the present invention, the concave surface is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid.

In one embodiment of the present invention, the top surface is a free-form surface, an elliptical surface, a spherical surface, or a paraboloid.

In one embodiment of the present invention, the bottom surface includes a plurality of microstructures.

In one embodiment of the present invention, the microstructure is selected from the group consisting of a semi-circular protrusion and an elliptical protrusion.

In one embodiment of the present invention, the microstructure is selected from the group consisting of a conical convex body, a triangular pyramidal convex body, a quadrangular pyramidal convex body, a hexagonal tapered convex body, and an irregular tapered convex body. .

In one embodiment of the present invention, the concave surface is coated with a reflective material.

In one embodiment of the present invention, the material of the beam steering element is selected from the group consisting of polycarbonate (Polycarbonate, PC), polymethylmethacrylate (PMMA), polyetherimide (PEI), and cyclic olefin. Cycloolefin coplymer (COC) Into the group.

In one embodiment of the present invention, the peak intensity of light passing through the beam steering element is between 77 and 80 degrees.

10‧‧‧ Beam Control Element

20‧‧‧ center axis

30‧‧‧ bottom

32‧‧‧Microstructure

40‧‧‧Glossy

42‧‧‧Light surface

44‧‧‧ cylindrical side

46‧‧‧ concave

48‧‧‧Ringed surface

50‧‧‧Into the glossy surface

52‧‧‧ top surface

54‧‧‧ inside

Fig. 1 is a perspective view showing the three-dimensional structure of the light beam controlling member of the first embodiment.

Fig. 2 is a cross-sectional view taken along line AA of Fig. 1.

Figure 3 is a schematic view of the light trace of the beam steering element of Figure 2.

Figure 4 is a spectrogram of the beam steering element of Figure 2.

Fig. 5 is a schematic cross-sectional view showing the beam control element of the second embodiment of the present invention.

Figure 6 is a plan view of the beam steering element of Figure 5.

Figure 7 is a plan view of the beam steering element of Figure 5.

Figure 8 is a schematic diagram of an embodiment of the microstructure of the present invention.

Figure 9 is a side elevational view of the beam steering element of the third embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2 for the perspective view of the beam control element of the first embodiment and the AA cross-sectional view of FIG. The light beam control element 10 includes a central axis 20, a bottom surface 30, a light exit surface 40, and a light incident surface 50. The bottom surface 30 is symmetrical to the central axis 20. The light exit surface 40 includes a light exit surface 42, a cylindrical side surface 44, and a concave surface 46. The light exit curved surface 42 is symmetric with respect to the central axis 20. The cylindrical side 44 surrounds the central axis 20 and is symmetrical about the central axis 20, and the cylindrical side 44 joins the light curved surface 42. The concave surface 46 is symmetrical to the central axis 20 and is connected to the cylindrical side surface 44, which is a concave curved reflecting surface. The light incident surface 50 includes a top surface 52 that is symmetrical to the central axis 20 and an inner side surface 54 that protrudes toward the bottom surface 30. The inner side surface 54 surrounds the central axis 20 and is symmetrical with respect to the central axis 20. The inner side surface 54 is connected to the bottom surface 30 and is concavely converged toward the light exit surface 40, and is connected to the top surface 52 at the end of the converging.

The light exiting surface 42 is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid, the concave surface 46 is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid, and the top surface 52 is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid surface. In this embodiment, the curved surface 42 may be a paraboloid, the concave surface 46 may be a free curved surface, and the top surface 52 may be a spherical surface, but this embodiment is not intended to limit the creation.

Concave surface 46 can be a curved surface designed using the principle of total reflection or a curved surface coated with a reflective material to reflect all incident light. The reflective material is selected from the group consisting of aluminum, nickel, tin, gold, silver, chromium, copper, and iron. In the present embodiment, the concave surface 46 may be a curved surface designed by the principle of total reflection, but this embodiment is not intended to limit the creation.

The material of the beam control element 10 is selected from the group consisting of polycarbonate (Polycarbonate, PC), polymethylmethacrylate (PMMA), polyetherimide (PEI) and cycloolefin coplymer (COC). ) the group formed. In the present embodiment, the material of the light beam controlling member 10 may be polycarbonate, but this embodiment is not intended to limit the creation.

Please refer to "Fig. 3", which is a schematic diagram of the light trace of the beam control element of "Fig. 2". The central axis of the light-emitting element 60 coincides with the central axis 20 of the light beam control element 10, which may be, but is not limited to, a light-emitting diode. The light emitted by the light-emitting element 60 passes through the light-incident surface 50 (the top surface 52 and the inner side surface 54) and is respectively refracted to the light-emitting surface 40 (the light-emitting surface 42, the cylindrical side surface 44 and the concave surface 46), and the concave surface 46 reflects the incident light, and the curved surface 42 and the cylindrical side 44 refract the incident light such that the peak intensity of the light passing through the beam steering element 10 (i.e., the light penetrates the exit surface 40) is between 77 and 80 degrees. In this embodiment, the peak intensity of the light passing through the beam control element 10 (ie, the light penetrating the light exit surface 40) is 80 degrees (as shown in FIG. 4, and the "Fig. 4" is "Fig. 2". The light pattern of the beam control element), but this embodiment Not used to limit the creation of this book.

Please refer to "Fig. 3", because some of the light incident on the beam control element 10 (as indicated by the broken line in "Fig. 3") cannot be penetrated by the refraction of the light incident surface 50 and the reflection and refraction of the light exit surface 50. The beam steering element 10 reduces the light extraction efficiency of the beam steering element 10. Therefore, the light extraction efficiency of the light beam control element 10 can be improved by providing the plurality of microstructures 32 on the bottom surface 30. Moreover, the arrangement of the microstructures 32 can effectively improve the uniformity of the light output of the light beam control element 10. For details, please refer to "figure 5" and "figure 6", which are schematic cross-sectional views of the beam control element of the second embodiment and a plan view of the beam control element of "figure 5". In the present embodiment, the difference between the second embodiment and the first embodiment is that the bottom surface 30 of the beam control element 10 of the second embodiment may further include a plurality of microstructures 32. The microstructure 32 is selected from the group consisting of a semi-circular convex body and an elliptical convex body. In the present embodiment, the microstructures 32 are semi-circular convex bodies, and the uniformity of the light output of the light beam control element 10 is effectively improved (as shown in FIG. 7 and the "figure 7" is "5th." Fig. 3 is a plan view of the beam control element, but this embodiment is not intended to limit the creation. For example, the microstructures 32 may be selected from a conical convex body (refer to FIG. 8 , which is a schematic diagram of an embodiment of the microstructure of the present invention), a triangular pyramidal protrusion, and a quadrangular pyramid. A group of convex bodies, hexagonal pyramidal protrusions, and irregular tapered protrusions.

Please refer to FIG. 9 for a side view of the beam control element of the third embodiment of the present invention. In the present embodiment, the difference between the third embodiment and the first embodiment is that the light-emitting surface 40 of the beam control element 10 of the third embodiment may further include an annular curved surface 48. The annular curved surface 48 can be an atomized or quilted surface to more effectively increase the light uniformity of the beam steering element 10.

In summary, the beam control component of the present invention can effectively reduce the thickness of the backlight module when applied to the backlight module, and at the same time maintain the uniform light distribution of the backlight module, thereby further improving the creation of the creation. More practical and more in line with the needs of consumers, it has indeed met the creation patent For the requirements of the application, the patent application is filed according to law.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited by this; therefore, the simple equivalent changes and modifications made by the scope of the patent application and the content of the creation specification are All should remain within the scope of this creation patent.

10‧‧‧ Beam Control Element

20‧‧‧ center axis

30‧‧‧ bottom

40‧‧‧Glossy

42‧‧‧Light surface

44‧‧‧ cylindrical side

46‧‧‧ concave

50‧‧‧Into the glossy surface

52‧‧‧ top surface

54‧‧‧ inside

Claims (10)

A beam control element comprising: a central axis; a bottom surface symmetrical to the central axis; and a light emitting surface comprising: a light emitting surface symmetric to the central axis; a cylindrical side surrounding the central axis and symmetric to the central axis a side surface of the cylinder is connected to the light exiting surface; and a concave surface symmetrical to the central axis and connected to the side surface of the cylinder, the concave surface is a concave curved reflecting surface; and a light incident surface comprising: a top surface, symmetric to the a central axis, the top surface protruding toward the bottom surface; and an inner side surface surrounding the central axis and symmetrical to the central axis, the inner side surface connecting the bottom surface and being concavely converged toward the light exiting surface, and is most converged The end is connected to the top surface. The beam control element of claim 1, wherein the light exiting surface is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid. The beam steering element of claim 1, wherein the concave surface is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid. The beam steering element of claim 1, wherein the top surface is a free curved surface, an elliptical curved surface, a spherical surface or a paraboloid. The beam steering element of claim 1, wherein the bottom surface comprises a plurality of microstructures. The beam steering element of claim 5, wherein the microstructures are selected from semi-circular A group of convex and elliptical convex bodies. The beam control element of claim 5, wherein the microstructures are selected from the group consisting of a conical convex body, a triangular pyramidal convex body, a quadrangular pyramidal convex body, a hexagonal tapered convex body, and an irregular tapered convex body. The group formed. The beam steering element of claim 1 wherein the concave surface is coated with a reflective material. The beam control element of claim 1, wherein the material of the beam control element is selected from the group consisting of polycarbonate (Polycarbonate, PC), polymethylmethacrylate (PMMA), and polyetherimide (Polyetherimide, Group of PEI) and Cycloolefin coplymer (COC). The beam steering element of claim 1, wherein the peak intensity of the light passing through the beam steering element is between 77 degrees and 80 degrees.