KR102143317B1 - Diffraction type optical element and optoelectronic module including the same - Google Patents

Abstract

Disclosed is a diffractive optical element for adjusting a light outputted from a light source toward a predetermined direction. According to the present invention, the diffractive optical element comprises: a first portion from which lights outputted from the light source is fully reflected, wherein the full-reflected lights are radiated in an optical axial line; and a second portion from which the lights are refracted, wherein a part of the refracted lights has an angle from the optical axial line, which is gradually increased from the optical axial direction, and the remainder of the refrigerated lights is radiated in the optical axial line.

Description

Diffraction type optical element and optoelectronic module including the same}

The present invention relates to a diffraction-type optical device and an optoelectronic module including the same, and more particularly, to a diffraction-type optical device capable of controlling light output from a light source toward a specific direction, and an optoelectronic module including the same.

The optoelectronic module may be used for external advertising signboards or lighting. An external advertisement signboard using a conventional optoelectronic module has a problem that people cannot focus on advertisement because it cannot shine light in a specific direction. In addition, there is a problem of light pollution as light emitted from an external advertisement signboard shines not only in a desired direction but also in an undesirable direction. Therefore, new optical devices and optoelectronic modules are required to solve the aforementioned problems.

Korean Patent Publication No. 10-0935205 (2009.12.24.)

The technical problem to be achieved by the present invention is to provide a diffractive optical device capable of controlling light output from a light source to face a specific direction, and an optoelectronic module including the same.

In the optical device according to an exemplary embodiment of the present invention, the light rays output from the light source are totally reflected, the first part implemented so that the total reflected light rays diverge in the optical axis direction, and the light rays are refracted, and some of the refracted rays are An angle between the light beam and the optical axis increases as the distance from the optical axis direction increases, and the rest of the refracted rays include a second portion configured to be diverged in the optical axis direction.

The first portion and the second portion are implemented such that the luminous intensity of the optical element is not the largest in the optical axis, and is the strongest at a position distant from the optical axis by an arbitrary distance.

The first portion includes a first inner side wall, a first inner surface perpendicular to the first inner side wall, a first inclined outer surface extending from the first inner surface, and a second inclined outer surface extending from the first inclined outer surface. An inclined outer surface and a third inclined outer surface extending from the second inclined outer surface. The first inner side wall is horizontal to the optical axis.

The second portion includes a first inclined inner surface extending from the first inner side wall to the optical axis, a second inclined inner surface extending from the first inclined inner surface, and a second inner surface extending from the second inclined inner surface A side wall, a fourth inclined outer surface extending from the third inclined outer surface, a fifth inclined outer surface extending from the fourth inclined outer surface, a sixth inclined outer surface extending from the fifth inclined outer surface, the third In the seventh inclined outer surface extending from the sixth inclined outer surface, the eighth inclined outer surface extending from the seventh inclined outer surface, the ninth inclined outer surface extending from the eighth inclined outer surface, the ninth inclined outer surface The second inner surface from the tenth inclined outer surface extending, the eleventh inclined outer surface extending from the tenth inclined outer surface, the twelfth inclined outer surface extending from the eleventh inclined outer surface, and the twelfth inclined outer surface And a second inner surface extending to the side wall.

The inner shape of the optical element formed by the first inner side wall, the first inclined inner surface, the second inclined inner surface, and the second inner side wall, and the first inclined outer surface to the 12th inclined The external shapes of the optical elements formed by the external surfaces are different from each other.

The first inclined outer surface is divided into a first plurality of gratings, the second inclined outer surface is divided into a second plurality of gratings, and the third inclined outer surface is divided into a third plurality of gratings. The angles between each of the plurality of gratings and the optical axis are all the same, the angles between each of the second plurality of gratings and the optical axis are the same, and each of the third plurality of gratings is perpendicular to the optical axis. The angles between the axes are all the same, and the first inner side wall and the first inner surface are not divided into a plurality of gratings.

The first inclined inner surface, the second inclined inner surface, the second inner side wall, the fourth inclined outer surface, the fifth inclined outer surface, the sixth inclined outer surface, the seventh inclined outer surface, the Each of the eighth inclined outer surface, the ninth inclined outer surface, the tenth inclined outer surface, the eleventh inclined outer surface, and the twelfth inclined outer surface is divided into a plurality of grids, and in the first inclined inner surface The plurality of divided gratings are all the same, the angles between each of the plurality of gratings divided on the first inclined inner surface and the axis perpendicular to the optical axis are the same, and the second inner surface is a plurality of gratings. Not divided.

The optoelectronic module according to an embodiment of the present invention includes a light source implemented on a substrate and a light source device.

The light source element is a first portion implemented so that the light rays output from the light source are totally reflected, the total reflected light rays are radiated in the optical axis direction, and the light rays are refracted, and some of the refracted rays are far from the optical axis direction. An angle between the light beam and the optical axis increases as it increases, and the rest of the refracted light rays include a second portion configured to diverge in the direction of the optical axis.

A diffraction optical device according to another embodiment of the present invention includes a first surface configured to refract light rays output from a light source, and a second surface configured to diffract light rays refracted through the first surface, The second surface is implemented with a plurality of steps, and the width of the step increases from one end to the other of the second surface.

The first surface and the second surface are implemented such that the luminous intensity of the optical element is not the largest in the optical axis, and is the strongest at a position distant from the optical axis by an arbitrary distance.

The second surface includes a first zone to which rays emitted farthest from among the rays from the light source belong, a second zone to which rays radiated closer than rays belonging to the first zone based on the light source belong, and And a third zone to which light rays radiating closer than light rays belonging to the second zone belong to the light source.

The second surface is implemented such that rays belonging to the third zone are bent more than rays belonging to the second zone, and rays belonging to the second zone are bent more than rays belonging to the first zone. .

The closer the first surface is to the center of the optical axis, the less the rays output from the light source are refracted, and the further away from the center of the optical axis, the more rays output from the light source are refracted.

An optoelectronic module according to another embodiment of the present invention includes a light source implemented on a substrate and a light source device. The light source device includes a first surface configured to refract light rays output from the light source, and a second surface configured to diffract light rays refracted through the first surface.

The second surface is implemented with a plurality of steps, and the width of the step increases from one end to the other of the second surface.

The optical device of the diffraction method according to an embodiment of the present invention and the optoelectronic module including the same include a first part implemented so that light output from a light source is totally reflected, and a second part implemented so that light output from the light source is refracted. By implementing a diffraction-type optical device, there is an effect of controlling the light output from the light source to face a specific direction.

In order to better understand the drawings cited in the detailed description of the present invention, detailed descriptions of each drawing are provided.
1 shows a cross-sectional view and a light distribution curve graph of conventional optoelectronic modules.
2 is a perspective view of an optical device according to an embodiment of the present invention.
3 is a cross-sectional view and a light distribution curve graph of the optical device shown in FIG. 2.
4 is a cross-sectional view of the optical element shown in FIG. 3.
5 is a cross-sectional view of an optical device according to another embodiment of the present invention.
6 is a cross-sectional view of an optical device according to another embodiment of the present invention.
7 shows a block diagram of an optoelectronic system including the optical device shown in FIG. 4, 5, or 6;

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are exemplified only for the purpose of explaining the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention It can be implemented in various forms and is not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosure forms, and includes all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the concept of the present invention, the first component may be named as the second component, and similarly The second component may also be referred to as a first component.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "just between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, "includes." Or "take it." The terms, such as, are intended to designate the existence of the described feature, number, step, action, component, part, or combination thereof, and one or more other features or numbers, steps, actions, components, parts, or combinations thereof. It is to be understood that the possibility of the existence or addition of one thing is not precluded.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present specification. Does not.

Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings.

1 shows a cross-sectional view and a light distribution curve graph of conventional optoelectronic modules. FIG. 1(a) shows a cross-sectional view and a light distribution curve graph when the optoelectronic module includes only a light source, and FIG. 1(b) shows a cross-sectional view and a light distribution curve graph when the optoelectronic module includes a light source and a general lens. .

Referring to FIG. 1A, when the optoelectronic module 1 includes only the light source 5 implemented on the substrate 3, the luminous intensity is the strongest at the center OX1 of the light source 3, and the light source 3 ), the further away from the center (OX1), the light intensity becomes weaker.

Referring to FIG. 1B, when the optoelectronic module 7 includes a light source 11 implemented on a substrate 9 and a general lens 13, the luminous intensity at the center OX2 of the light source 11 It is the strongest, and the luminous intensity decreases as the distance from the center OX2 of the light source 3 increases.

When the optoelectronic modules 1 or 7 shown in FIGS. 1A and 1B are used for an advertisement signboard, light emitted from the advertisement signboard is irradiated in not only a desired direction but also an undesired direction. This is because the luminous intensity is the strongest at the center (OX1 or OX2) of the light sources 3 or 11, and the luminous intensity decreases as the distance from the center (OX1 or OX2) of the light sources 3 or 11 increases. In order to increase the effect of the advertising signboard and to illuminate the light only in a desired direction, a new optical device to control the light output from the light source 5 or 11 is required.

2 is a perspective view of an optical device according to an embodiment of the present invention. 3 is a cross-sectional view and a light distribution curve graph of the optical device shown in FIG. 2. 4 is a cross-sectional view of the optical element shown in FIG. 3.

2 to 4, the optoelectronic module 20 may be used for advertising signage, digital signage, or lighting. The optoelectronic module 20 includes a light source 23 and an optical device 30 implemented on the substrate 21.

A plurality of light rays (11-1 to 11-n; n is a natural number) are emitted from the light source 23. The light source 23 may be implemented as a VCSEL (Vertical-Cavity Surface-Emitting Laser) array.

The optical element 30 refers to an optical system between tens of micrometers and millimeters, such as a lens. The optical device 30 has a cylindrical shape with a fine inside.

In the optical device 30, the light rays R1 and R2 output from the light source 23 are totally reflected, and the total reflected light rays R1 and R2 are a first part P1 implemented so as to diverge in the direction of the optical axis OX3. ), and the rays (R3 to Rn; n is a natural number) are refracted, and some of the refracted rays (R3 to Rn) (R4 to Rn) are light rays (R4, R5) as the distance from the optical axis (OX3) direction increases. ,.. The angle between Rn and the optical axis OX3 is increased, and the remaining R3 of the refracted rays R3 to Rn includes a second part P2 implemented so as to diverge in the direction of the optical axis OX3. do,

The first part (P1) and the second part (P2) are implemented so that the luminous intensity of the optical device 30 is not the largest from the optical axis (OX3), but is the strongest at a position away from the optical axis (OX3) by an arbitrary distance (d1). do.

The first portion P1 is a first inner side wall 31, a first inner surface 33 perpendicular to the first inner side wall 31, a first inclined outer surface extending from the first inner surface 33 (35), a second inclined outer surface 37 extending from the first inclined outer surface 35, and a third inclined outer surface 39 extending from the second inclined outer surface 37.

The first inner side wall 31 is horizontal with the optical axis OX3. The first inner surface 33 is horizontal with the substrate 21. The angle between the first inner surface 33 and the first inclined outer surface 35 is greater than 90 degrees and less than 120 degrees. The angle between the first inclined outer surface 35 and the second inclined outer surface 37 is greater than 150 degrees and less than 180 degrees. The angle between the second inclined outer surface 37 and the third inclined outer surface 39 is greater than 90 degrees and less than 120 degrees.

The second portion P2 includes a first inclined inner surface 61 extending from the first inner side wall 31 to the optical axis OX3, and a second inclined inner surface 63 extending from the first inclined inner surface 61. ), and a second inner side wall 65 extending from the second inclined inner surface 63.

The angle between the first inner side wall 31 and the first inclined inner surface 61 is greater than 90 degrees and less than 100 degrees. The angle between the first inclined inner surface 61 and the second inclined inner surface 63 is greater than 100 degrees and less than 180 degrees. The angle between the second inclined inner surface 63 and the second inner side wall 65 is greater than 120 degrees and less than 180 degrees.

The second part P2 is a fourth inclined outer surface 41 extending from the third inclined outer surface 39, a fifth inclined outer surface 43 extending from the fourth inclined outer surface 41, and the fifth inclined The sixth inclined outer surface 45 extending from the outer surface 43, the seventh inclined outer surface 47 extending from the sixth inclined outer surface 45, the eighth extending from the seventh inclined outer surface 47 The inclined outer surface 49, the ninth inclined outer surface 51 extending from the eighth inclined outer surface 49, the tenth inclined outer surface 53 extending from the ninth inclined outer surface 51, the tenth inclined The eleventh oblique outer surface 55 extending from the outer surface 53, the twelfth oblique outer surface 57 extending from the eleventh oblique outer surface 55, and the second inner at the twelfth oblique outer surface 57 It further comprises a second inner surface 59 extending to the side wall 65.

The third inclined outer surface 39 and the fourth inclined outer surface 41 form one surface. The third inclined outer surface 39 belongs to the first portion P1, and the fourth inclined outer surface 41 belongs to the second portion P2. The angle between the fourth inclined outer surface 41 and the fifth inclined outer surface 43 is 150 degrees or more and 180 degrees or less. The angle between the fifth inclined outer surface 43 and the sixth inclined outer surface 45 is 170 degrees or more and 180 degrees or less. The angle between the sixth inclined outer surface 45 and the seventh inclined outer surface 47 is 90 degrees or more and 180 degrees or less. The angle between the seventh inclined outer surface 47 and the eighth inclined outer surface 49 is 150 degrees or more and 180 degrees or less. The angle between the eighth inclined outer surface 49 and the ninth inclined outer surface 51 is 120 degrees or more and 180 degrees or less. The angle between the ninth inclined outer surface 51 and the tenth inclined outer surface 53 is 150 degrees or more and 180 degrees or less. The angle between the tenth inclined outer surface 53 and the eleventh inclined outer surface 55 is 150 degrees or more and 180 degrees or less. The angle between the eleventh inclined outer surface 55 and the twelfth inclined outer surface 57 is 150 degrees or more and 180 degrees or less. The angle between the twelfth inclined outer surface 57 and the second inner surface 59 is 90 degrees or more and 120 degrees or less. The angle between the second inner surface 59 and the second inner side wall 65 is 90 degrees or more and 120 degrees or less.

The inner shape of the optical element 30 formed by the first inner side wall 31, the first inclined inner surface 61, the second inclined inner surface 63, and the second inner side wall 65, The external shapes of the optical elements 30 formed by the first inclined outer surface 35 to the twelfth inclined outer surface 57 are different from each other.

The optical device 30 may be divided into three zones Z1 to Z3. The first zone Z1 is a region in which light rays are diverged through the first inclined outer surface 35 to the sixth inclined outer surface 45. The second zone Z2 is a region through which light rays are diverged through the seventh inclined outer surface 47 to the eighth inclined outer surface 49. The third zone Z3 is a region through which light rays are diverged through the ninth inclined outer surface 51 to the twelfth inclined outer surface 57.

Referring to the graph of FIG. 4, the intensity of light rays emitted through the first zone Z1 is the greatest at a position away from the center OX3 of the light source 23 by an arbitrary distance d1. The intensity of the rays emitted through the first zone Z1 is greater than the intensity of the rays emitted through the second zone Z2, and the intensity of the rays emitted through the second zone Z2 is in the third zone Z3. It is stronger than the intensity of the rays radiating through it.

The rays emitted through the first zone Z1 are dissipated farther from the light source 23 than the rays radiated through the second zone Z2, and the rays emitted through the second zone Z2 are reduced. The light rays radiate farther based on the light source 23 than the rays radiated through the three zone Z3.

The optical device 30 focuses the rays at a specific location by varying the intensity of the rays and the divergence distance from the light source 23 depending on which part of the optical device 30 the rays of light output from the light source 23 are emitted. I can. When the optical device 30 is used for an advertisement signboard, complaints caused by light pollution can be reduced.

5 is a cross-sectional view of an optical device according to another embodiment of the present invention.

Referring to FIG. 5, the optical device 30-1 has a structure different from that of the optical device 30 shown in FIGS. 3 and 4.

The first inclined outer surface 35-1 is divided into a first plurality of grids.

The second inclined outer surface 37-1 is divided into a second plurality of grids.

The third inclined outer surface 39-1 is divided into a third plurality of grids.

The gratings and the gratings to be described below may have the same shape as the inclined outer surface, but may be defined as repeating shapes having small sizes.

The first plurality of gratings divided on the first inclined outer surface 35-1 are all the same. The angles θ1 between each of the first plurality of gratings and the optical axis OX3' are all the same. The angle θ1 between each of the first plurality of gratings and the optical axis OX3' is the first inclined outer surface 35 and the optical axis OX3'' of the optical device 30 shown in FIGS. 3 and 4 It is equal to the angle between (θ1).

The second plurality of gratings divided on the second inclined outer surface 37-1 are all the same. The angle θ2 between each of the second plurality of gratings and the optical axis OX3 is the same. The angle θ2 between each of the second plurality of gratings and the optical axis OX3' is the second inclined outer surface 37 and the optical axis OX3'' of the optical device 30 shown in FIGS. 3 and 4 It is equal to the angle between (θ2).

The third plurality of gratings divided on the third inclined outer surface 39-1 are all the same. The angles θ3 between each of the third plurality of gratings and the axis VX3' perpendicular to the optical axis OX3 are the same. The angle θ3 between each of the third plurality of gratings and the axis VX3′ perpendicular to the optical axis OX3 is the third inclined outer surface 39 of the optical device 30 shown in FIGS. 3 and 4 Is equal to the angle (θ3) between the optical axis (OX3) and the vertical axis (VX3).

The first inner side wall 31-1 and the first inner surface 33-1 are not divided into a plurality of grids.

The first inclined inner surface (61-1), the second inclined inner surface (63-1), the second inner side wall (65-1), the fourth inclined outer surface (41-1), the fifth inclined outer surface ( 43-1), the sixth inclined outer surface (45-1), the seventh inclined outer surface (47-1), the eighth inclined outer surface (49-1), the ninth inclined outer surface (51-1), Each of the tenth inclined outer surface 53-1, the eleventh inclined outer surface 55-1, and the twelfth inclined outer surface 57-1 is divided into a plurality of grids.

The first inclined inner surface 61-1 is divided into a fourth plurality of grids. The fourth plurality of gratings divided by the first inclined inner surface 61-1 are all the same. The angles between each of the fourth plurality of gratings and an axis perpendicular to the optical axis OX3 are all the same. The angle between each of the fourth plurality of gratings and the axis perpendicular to the optical axis OX3 is perpendicular to the first inclined inner surface 61 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4. Is equal to the angle between the axes.

The second inclined inner surface 63-1 is divided into a fifth plurality of grids. The fifth plurality of gratings divided on the second inclined inner surface 63-1 are all the same. The angles between each of the fifth plurality of gratings and an axis perpendicular to the optical axis OX3 are all the same. The angle between each of the fifth plurality of gratings and the axis perpendicular to the optical axis OX3 is perpendicular to the second inclined inner surface 63 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4. Is equal to the angle between the axes.

The second inner side wall 65-1 is divided into a sixth plurality of grids. The sixth plurality of grids divided by the second inner side wall 65-1 are all the same. The angles between each of the sixth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the sixth plurality of gratings and the optical axis OX3 is the same as the angle between the second inner side wall 65 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The fourth inclined outer surface 41-1 is divided into a seventh plurality of grids. The seventh plurality of gratings divided on the fourth inclined outer surface 41-1 are all the same. The angles between each of the seventh plurality of gratings and an axis perpendicular to the optical axis OX3 are all the same. The angle between each of the seventh plurality of gratings and the axis perpendicular to the optical axis OX3 is perpendicular to the fourth oblique outer surface 41 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4. Is equal to the angle between the axes. An angle between each of the seventh plurality of gratings and an axis perpendicular to the optical axis OX3 is an axis perpendicular to each of the third plurality of gratings divided by the third inclined outer surface 39-1 and the optical axis OX3 It is equal to the angle (θ3) between (VX3').

The fifth inclined outer surface 43-1 is divided into eighth plurality of grids. The eighth plurality of grids divided on the fifth inclined outer surface 43-1 are all the same. The angles between each of the eighth plurality of gratings and an axis perpendicular to the optical axis OX3 are all the same. The angle between each of the eighth plurality of gratings and the axis perpendicular to the optical axis OX3 is perpendicular to the fifth oblique outer surface 43 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4. Is equal to the angle between the axes.

The sixth inclined outer surface 45-1 is divided into a ninth plurality of grids. The ninth plurality of gratings divided on the sixth inclined outer surface 45-1 are all the same. The angles between each of the ninth plurality of gratings and an axis perpendicular to the optical axis OX3 are all the same. The angle between each of the ninth plurality of gratings and the axis perpendicular to the optical axis OX3 is perpendicular to the sixth oblique outer surface 45 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4. Is equal to the angle between the axes.

The seventh inclined outer surface 47-1 is divided into a tenth plurality of grids. The tenth plurality of grids divided on the seventh inclined outer surface 47-1 are all the same. The angles between each of the tenth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the tenth plurality of gratings and the optical axis OX3 is the same as the angle between the seventh inclined outer surface wall 47 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The eighth inclined outer surface 49-1 is divided into an eleventh plurality of grids. The eleventh plurality of grids divided by the eighth inclined outer surface 49-1 are all the same. The angles between each of the eleventh plurality of gratings and the optical axis OX3 are all the same. The angle between each of the eleventh plurality of gratings and the optical axis OX3 is the same as the angle between the eighth inclined outer surface wall 49 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The ninth inclined outer surface 51-1 is divided into a twelfth plurality of grids. The twelfth plurality of grids divided on the ninth inclined outer surface 51-1 are all the same. The angles between each of the twelfth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the twelfth plurality of gratings and the optical axis OX3 is the same as the angle between the ninth oblique outer surface wall 51 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The tenth inclined outer surface 53-1 is divided into a thirteenth plurality of grids. The thirteenth plurality of gratings divided on the tenth inclined outer surface 53-1 are all the same. The angles between each of the thirteenth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the thirteenth plurality of gratings and the optical axis OX3 is the same as the angle between the tenth oblique outer surface wall 53 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The eleventh inclined outer surface 55-1 is divided into a fourteenth plurality of grids. The fourteenth plurality of grids divided on the eleventh inclined outer surface 55-1 are all the same. The angles between each of the fourteenth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the fourteenth plurality of gratings and the optical axis OX3 is the same as the angle between the eleventh oblique outer surface wall 55 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

Each of the twelfth inclined outer surfaces 57-1 is divided into fifteenth plurality of grids. The fifteenth plurality of grids divided on the 12th inclined outer surface 57-1 are all the same. The angles between each of the fifteenth plurality of gratings and the optical axis OX3 are all the same. The angle between each of the fifteenth plurality of gratings and the optical axis OX3 is equal to the angle between the twelfth oblique outer surface wall 57 and the optical axis OX3 of the optical device 30 shown in FIGS. 3 and 4.

The second inner surface 59-1 is not divided into a plurality of gratings.

A light source (not shown) used with the optical device 30 shown in FIG. 5 may be implemented as an LED or a lamp that is not coherent.

6 is a cross-sectional view of an optical device according to another embodiment of the present invention.

Referring to FIG. 6, the optoelectronic module 20-2 includes a light source 23-2 and an optical device 30-2 implemented on a substrate 21-2. The optoelectronic module 20-2 shown in FIG. 6 has a structure different from the optoelectronic module 20 shown in FIGS. 2 to 5. In addition, the optical device 30-2 has a structure different from that of the optical device 30 or 30-1 shown in FIGS. 2 to 5. The light source 23-2 may be implemented as a coherent laser diode or a vertical-cavity surface-emitting laser (VCSEL). The angle θ13 between the light rays output from the light source 23-2 is within 30 degrees.

The optical device 30-2 includes a first surface 30-3 and a second surface 30-4.

The first surface 30-3 is implemented so that light rays output from the light source 23-2 can be refracted. The closer the first surface 30-3 is to the center of the optical axis OX4, the less the rays output from the light source 23-2 (eg, RL3) are refracted, and the farther from the center of the optical axis OX4, the light source Light rays (eg, RL1 or RLn) output from (23-2) are implemented to be refracted more.

The second surface 30-4 is implemented such that light rays refracted through the first surface 30-3 can be diffracted. The second surface 30-4 is implemented in a plurality of steps. The width of the step increases as it goes from one end of the second surface 30-4 to the other. For example, the width w2 of the second step is longer than the width w1 of the first step. The width w1 of the first step is 100 nm or less.

When the optoelectronic module 20-2 is used as an advertisement signboard, the optical device 30-2 uses the light source 23-2 like the optical device 30 or 30-1 shown in FIGS. 2 to 5 It is implemented so that the intensities of the rays emitted through are different from each other.

The second surface 30-4 may be divided into three zones Z4 to Z6. The first zone Z4 is an area to which the rays RL1 and RL2 radiating farthest from the light source 23-2 belong. The second zone Z5 is a region to which the rays RL3 and RL4 radiating closer than the rays RL1 and RL2 belonging to the first zone Z4 based on the light source 23-2 belong. The third zone Z6 is a region to which rays RLn (n is a natural number) radiating closer than the rays RL3 and RL4 belonging to the second zone Z5 based on the light source 23-2 belong.

In order for the light rays RLn emitted from the third zone Z6 to radiate most closely from the light source 23-2, the second surface 30-4 needs to be bent relatively more. In order for the rays RL3 and RL4 emitted from the second zone Z5 to radiate farther from the light source 23-2 than the rays RLn emitted from the third zone Z6, the third zone ( The second surface 30-4 should be bent less than the rays RLn emitted from Z6). In order for the light rays RL1 and RL2 emitted from the first zone Z4 to radiate farther from the light source 23-2 than the light rays RL3 and RL4 emitted from the second zone Z5, the second The second surface 30-4 should bend less than the light rays RL3 and RL4 emitted from the zone Z5. That is, the rays radiated from the first zone (Z4) RL1 and RL2 are the least bent, and the rays radiated from the second zone (Z5) (RL3, RL4), and the third zone (Z6). The rays RLn are in order. That is, in order to increase the bending of the second surface 30-4 from one end to the other, the angle between the axis VX4 perpendicular to the optical axis OX4 and the refractive surface of the second surface 30-4 should be small. do. That is, the first angle θ10 must be greater than the second angle θ11. Since the first angle θ10 must be greater than the second angle θ11, the width of the step increases from one end of the second surface 30-4 to the other.

Referring to the graph of FIG. 7, the intensity of light rays RL1 and RL2 emitted through the first zone Z4 is the strongest at a location distant from the center of the light source 23-2 by an arbitrary distance d2. The intensity of the rays emitted through the first zone Z4 is greater than the intensity of the rays emitted through the second zone Z5, and the intensity of the rays emitted through the second zone Z5 is in the third zone Z6. It is stronger than the intensity of the rays radiating through it.

The optical element 30-2 differs in intensity of the light rays and the divergence distance from the light source 23-2 depending on which part of the optical element 30-2 the light rays output from the light source 23-2 are emitted. By doing this, you can focus the rays at a specific location. When the optical device 30-2 is used for an advertisement signboard, complaints caused by light pollution can be reduced.

7 shows a block diagram of an optoelectronic system including the optical device shown in FIG. 4, 5, or 6;

Referring to FIG. 7, the optoelectronic system 100 may be used for an advertisement signboard or the like. In the advertising signboard, light is directed in a specific direction. The optoelectronic system 100 includes an optoelectronic module 20 and outer cases 110 and 120. The optoelectronic module 20 includes a light source (not shown) and an optical device 30 implemented on the optoelectronic substrate 21. The outer cases 110 and 120 serve to protect the optoelectronic module 20 from external impact. In addition, the outer cases 110 and 120 serve to prevent light rays output from the light source from going out of the outer cases 110 and 120.

Referring to FIG. 7, the optoelectronic system 100 may be used in the field of advertising signboards, lighting for display devices, windows, exterior billboards, medical and industrial laser optical devices, or special illuminators. In the advertising signboard, light is directed in a specific direction. The optoelectronic system 100 includes an optoelectronic module 20 and outer cases 110 and 120. The optoelectronic module 20 includes a light source (not shown) and an optical device 30 implemented on the optoelectronic substrate 21. The outer cases 110 and 120 serve to protect the optoelectronic module 20 from external impact. In addition, the outer cases 110 and 120 serve to prevent light rays output from the light source from going out of the outer cases 110 and 120. In the case of a conventional optoelectronic system, a light guide plate (LGP, Light Gudie Panel) corresponding to the display area (in the case of FIG. 7, the area of the outer case 110 or 120) was required. However, in the case of the present invention, the optical device 30 shown in FIG. 2 is linear, and the light source is coupled to correspond to the optical device 30, so unlike a conventional optoelectronic system, a light guide plate corresponding to the display area is required. As a result, the optoelectronic system 100 can be miniaturized. Due to these advantages, material savings and installation freedom are high.

Although the present invention has been described with reference to an embodiment illustrated in the drawings, this is only exemplary, and those of ordinary skill in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the attached registration claims.

20-2: optoelectronic module;
21-2: substrate;
23-2: light source;
30-2: optical element;

Claims (7)

delete delete delete delete delete A first portion implemented such that rays output from a light source are totally reflected, and the total reflected rays are diverged in a direction of an optical axis; And
The second part is implemented such that the light rays are refracted, and some of the refracted rays increase in an angle between the light rays and the optical axis as the distance from the optical axis direction increases, and the rest of the refracted rays diverge in the optical axis direction Including,
The first part and the second part,
The luminous intensity of the optical device is not the largest in the optical axis, and is implemented so that the intensity is the strongest at a position away from the optical axis by an arbitrary distance
The first part,
A first inner side wall;
A first inner surface perpendicular to the first inner side wall;
A first inclined outer surface extending from the first inner surface;
A second inclined outer surface extending from the first inclined outer surface; And
And a third inclined outer surface extending from the second inclined outer surface,
The first inner side wall is horizontal with the optical axis,
The second part.
A first inclined inner surface extending from the first inner sidewall to the optical axis;
A second inclined inner surface extending from the first inclined inner surface;
A second inner side wall extending from the second inclined inner surface;
A fourth inclined outer surface extending from the third inclined outer surface;
A fifth inclined outer surface extending from the fourth inclined outer surface;
A sixth inclined outer surface extending from the fifth inclined outer surface;
A seventh inclined outer surface extending from the sixth inclined outer surface;
An eighth inclined outer surface extending from the seventh inclined outer surface;
A ninth inclined outer surface extending from the eighth inclined outer surface;
A tenth inclined outer surface extending from the ninth inclined outer surface;
An eleventh inclined outer surface extending from the tenth inclined outer surface;
A twelfth inclined outer surface extending from the eleventh inclined outer surface; And
An optical device comprising a second inner surface extending from the twelfth inclined outer surface to the second inner sidewall. A light source implemented on the substrate; And
It includes a light source device,
The light source device,
A first surface configured to refract light rays output from the light source; And
And a second surface configured to diffract light rays refracted through the first surface,
The second surface is implemented with a plurality of steps, and the width of the step increases from one end of the second surface to the other,
The first part is,
A first inner side wall;
A first inner surface perpendicular to the first inner side wall;
A first inclined outer surface extending from the first inner surface;
A second inclined outer surface extending from the first inclined outer surface; And
And a third inclined outer surface extending from the second inclined outer surface,
The first inner side wall is horizontal to the optical axis,
The second part is,
A first inclined inner surface extending from the first inner sidewall to the optical axis;
A second inclined inner surface extending from the first inclined inner surface;
A second inner side wall extending from the second inclined inner surface;
A fourth inclined outer surface extending from the third inclined outer surface;
A fifth inclined outer surface extending from the fourth inclined outer surface;
A sixth inclined outer surface extending from the fifth inclined outer surface;
A seventh inclined outer surface extending from the sixth inclined outer surface;
An eighth inclined outer surface extending from the seventh inclined outer surface;
A ninth inclined outer surface extending from the eighth inclined outer surface;
A tenth inclined outer surface extending from the ninth inclined outer surface;
An eleventh inclined outer surface extending from the tenth inclined outer surface;
A twelfth inclined outer surface extending from the eleventh inclined outer surface; And
The optoelectronic module configured to include a second inner surface extending from the twelfth oblique outer surface to the second inner sidewall.

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