JP6266723B2 - Wide-angle illumination light source - Google Patents

Description

  The present invention relates to a wide-angle illumination light source, and more particularly to an illumination light source having wide-angle illumination and uniform illumination.

  In recent years, indirect lighting has been widely applied to interior design and architectural decoration. Indirect lighting can produce a softer light and give a more relaxed sensation than the direct illumination glare and dazzling light. However, indirect illumination can improve the comfort of the space, but has disadvantages such as poor illumination efficiency, a small illumination angle range, uneven illumination, and requiring a complicated decorative structure.

  Large-scale outdoor advertising billboards generally achieve the purpose of illumination by directly irradiating the billboard with a light source. In order to obtain a more uniform illumination area, the light source needs to be installed far away from the sign, but in this way, multiple sets of light sources are required to achieve the required brightness. Even when a plurality of sets of light sources are irradiated at a long distance, there is still a problem that the irradiation area is not uniform.

  The present invention relates to a light emitting device for providing a light beam, a light divergence system having a width that gradually decreases toward the light emitting device, and a light beam of the light emitting device. A light collecting system used for focusing the light on the light divergence system, wherein the light divergence system is used to project the light beam that has passed through the light collection system onto the projection surface, and the light emitting element is the projection surface and the light divergence system. Wide-angle illumination light source installed between the two.

  In one or more embodiments, light rays that have passed more than 70% of the collection system are incident on the light divergence system.

  In one or more embodiments, the light diverging system has an aspheric reflective surface that faces the light emitting element.

  In one or more embodiments, the light divergence system is a tapered reflective element whose apex faces the light emitting element.

  In one or more embodiments, the cross section from the apex of the tapered reflective element to the bottom of the tapered reflective element has at least one curved side.

  In one or more embodiments, light provided from more than 70% of the light emitting elements is incident on the collection system.

  In one or more embodiments, the light collection system includes a convex lens, a concave lens, a compound parabolic concentrator, or a combination thereof.

  In one or more embodiments, the light emitting elements are located on the optical axis of the light collection system.

  In one or more embodiments, the wide-angle illumination light source further includes a reflective structure disposed at least between the light emitting element and the light collection system and between the light collection system and the light diverging system.

  In one or more embodiments, the light emitting elements are installed to be offset from the optical axis of the light collection system.

  In one or more embodiments, the reflective structure has a plurality of through holes for fitting the light collection system and the light diverging system.

  In one or more embodiments, the light collection system has at least one contact surface and is secured to the reflective structure by the contact surface, and the optical axis of the light collection system is located at the contact surface.

  In one or more embodiments, the light divergence system has a contact surface and is secured to the reflective structure by the contact surface, and the optical axis of the collection system is located at the contact surface.

  In one or more embodiments, the wide-angle illumination light source includes a light stand for fixing the light emitting element, the light divergence system, and the light collection system to the projection surface. Is further included.

  In one or a plurality of embodiments, the light stand includes a fixing part installed on the projection surface and a support part for fixing the light divergence system to the fixing part.

  In one or a plurality of embodiments, the fixed part has a storage space in which both the light emitting element and the light condensing system are installed and a part of the light condensing system is exposed.

  In one or more embodiments, the light divergence system includes a base, and opposite opposite ends of the support are secured to the base and the fixed part, respectively.

  In one or more embodiments, the wide-angle illumination light source has a reflective structure that is at least installed between the light emitting element and the light collection system and between the light collection system and the light diverging system and fixed to the light stand. In addition.

  The wide-angle illumination light source of the above embodiment can effectively project the light beam of the light emitting element onto the projection surface so as to emit light having a uniform and wide area.

It is a schematic diagram of the wide-angle illumination light source and projection surface of one Embodiment of this invention. FIG. 2 is a cross-sectional view of an embodiment of the light diverging system of FIG. It is sectional drawing of the light emitting element of FIG. It is the irradiation luminance figure simulated on the projection surface by each parameter of Table 1 and paragraph [0027]. It is a schematic diagram of the wide-angle illumination light source and projection surface of another embodiment of this invention. It is a front view of the reflective structure of FIG. It is a schematic diagram of the wide-angle illumination light source and projection surface of further another embodiment of this invention. FIG. 6 is an irradiation luminance diagram simulated on the projection surface of the wide-angle illumination light source in FIG. 5. It is a schematic diagram of the wide-angle illumination light source and projection surface of further one embodiment of this invention. FIG. 10 is an exploded view of the wide-angle illumination light source of FIG. 9. It is a schematic diagram of the wide-angle illumination light source and projection surface of another embodiment of this invention.

  In the following description, numerous practical details are set forth in the following description in order to disclose and clearly explain the several embodiments of the present invention in the drawings. However, it should be understood that these actual details are not intended to limit the invention. That is, in some of the embodiments of the present invention, these actual details are not necessary. Also, to simplify the drawings, some conventional structures and elements are shown schematically and simply in the drawings.

  FIG. 1 is a schematic diagram of a wide-angle illumination light source and a projection surface 900 according to an embodiment of the present invention. The wide-angle illumination light source includes a light emitting device 110, a light divergence system 120, and a light collection system 130. The light emitting element 110 is used to provide the light beam 112. The light divergence system 120 has a width W that gradually decreases toward the light emitting element 110. The light collection system 130 is installed between the light emitting element 110 and the light diverging system 120. The light collecting system 130 is used to focus the light beam 112 of the light emitting element 110 onto the light diverging system 120, and the light diverging system 120 is used to project the light beam 112 that has passed through the light collecting system 130 onto the projection surface 900. It is done. The light emitting element 110 is installed between the projection surface 900 and the light divergence system 120.

  For the sake of clarity, only the passage paths of some rays 112 are shown in FIG. Further, since the light collecting system 130 may be made of a transparent material, the light beam 112 can be transmitted through the light collecting system 130, and the light diverging system 120 has a reflection surface 122 (see below for details). 1 may be reflected by the surface of light divergence system 120 (ie, reflective surface 122).

  As used herein, “substantially” modifies any slightly variable relationship, but these slight changes do not alter its essence. For example, the description that “the light divergence system 120 has a width W that gradually decreases toward the light emitting element 110” means that the width W of the light divergence system 120 surely decreases gradually toward the light emitting element 110. In other words, if the width W of the light divergence system 120 is reduced toward the light emitting element 110, the width W of the light divergence system 120 is slightly increased in some sections of the light divergence system 120. May be further reduced, or may be further increased after being slightly reduced.

  The wide-angle illumination light source of the present embodiment can effectively project the light beam 112 of the light-emitting element 110 onto the projection surface 900 so as to form a uniform irradiation area having a wide angle and a wide range. Specifically, the light beam 112 provided by the light emitting element 110 enters the light collection system 130. The light collection system 130 focuses the light beam 112, ie, causes the light beam 112 that passes through the light collection system 130 to have a smaller divergence angle compared to the light beam 112 incident on the light collection system 130. Such a structure can effectively focus the light beam 112 provided by the light emitting device 110 on the light diverging system 120 so as to improve the usage efficiency of the light beam 112. Next, the light beam 112 transmitted through the condensing system 130 enters the light divergence system 120, and the light divergence system 120 reflects the light beam 112 to the projection surface 900 located behind the light emitting element 110. Since the light divergence system 120 has a width W that gradually decreases toward the light emitting device 110, the divergence angle of the light beam 112 can be increased, thereby increasing the irradiation area of the light beam 112. The light beam 112 projected on the projection surface 900 can achieve the purpose of indirect illumination by scattering. In this manner, the wide-angle illumination light source of the present embodiment can form a wide and uniform illumination area on the projection surface 900 at a short distance.

  In some embodiments, more than 70% of the light rays 112 provided from the light emitting elements 110 are incident on the light collection system 130, i.e., the light collection system 130 converges the light rays 112 provided from the majority of the light emitting elements 110. Light system 130 can focus most of light beam 112 and guide it to light diverging system 120. Also, because the light collection system 130 focuses the light beam 112, more than 70% of the light beam 112 that has passed through the light collection system 130 is incident on the light diverging system 120, and thus the light diverging system 120 is mostly The light beam 112 can be effectively guided to the projection surface 900.

  Next, a specific structure of the light diverging system 120 in an embodiment will be described. In FIG. 1, the light diverging system 120 has an aspheric reflecting surface 122 that faces the light emitting element 110 and the light collecting system 130. The reflection surface 122 is used to reflect the light beam 112 to the projection surface 900. The reflecting surface 122 can be designed according to actual demand, and thereby, the reflecting surface 122 has an aspherical surface and a uniform illumination area is formed on the projection surface 900.

  Please refer to FIG. FIG. 2 is a cross-sectional view of an embodiment of the light diverging system 120 of FIG. For example, the light diverging system 120 may be a tapered reflective element, such as a conical reflective element or a polygonal pyramidal reflective element, but the present invention is not limited thereto. The tapered reflective element has a vertex P and a bottom 124 facing each other, and the vertex P faces the light emitting element 110 (shown in FIG. 1). In this embodiment, the width W of the light divergence system 120 is defined as the diameter of each cross section that is substantially parallel to the plane of the bottom 124. For example, the width W shown in FIG. 2 is the diameter of the surface of the bottom 124. In FIG. 2, the diameter of each cross section of the tapered reflective element is gradually reduced toward the apex P.

  Furthermore, when it is going to form a uniform irradiation area, you may design the arc degree of the side surface of a taper-shaped reflective element. In FIG. 2, the cross section 125 from the apex P of the tapered reflective element to the bottom 124 of the tapered reflective element has at least one curved side 126. In other words, the side 126 is not a straight line. In certain embodiments, depending on actual demand, the side 126 may be curved out of the tapered reflective element (shown in FIG. 2), curved into the tapered reflective element, or wavy. The shape may be irregular. The shape of the light diverging system 120 of FIG. 2 is merely exemplary and is not intended to limit the present invention. Those skilled in the art can flexibly design the shape of the light diverging system 120 according to actual demand.

  Returning to FIG. In some embodiments, the light emitting element 110 is located on the optical axis O of the light collection system 130, in other words, the optical axis O of the light collection system 130 passes through the light emitting element 110, and such an installation results in a projection surface. An irradiation area that is relatively symmetric with respect to 900 can be obtained, and can be applied to, for example, room lighting. Therefore, the projection surface 900 may be a ceiling or a wall surface. In addition, the light divergence system 120 may be located on the optical axis O of the light collection system 130, that is, the light emitting element 110, the light collection system 130, and the light divergence system 120 may be arranged in a straight line.

  As shown in FIG. 1, the light collection system 130 includes at least one lens, for example, two convex lenses 132 and 134. In another embodiment, the collection system 130 may include a convex lens, a concave lens, a compound parabolic concentrator (CPC), or a combination thereof. Basically, if the light beam 112 provided by the light emitting device 110 can be focused so as to be guided to the reflecting surface 122 of the light diverging system 120, it belongs to the scope of the present invention. In certain embodiments, depending on the actual situation, the surfaces of the convex lenses 132, 134 may be spherical, aspheric or free curved.

  In certain embodiments, the light emitting device 110 may be a light emitting diode, a laser, or another suitable light source. Refer to FIG. 3 for an example. FIG. 3 is a cross-sectional view of the light emitting device 110 of FIG. The light emitting device 110 of FIG. 3 is a light emitting diode module, and includes a light emitting diode chip 114, a holder 116, and a packaging material 118. The light emitting diode chip 114 may be electrically connected to the holder 116 by a wire 115, and the packaging material 118 covers the light emitting diode chip 114. The packaging material 118 may not only protect the light emitting diode chip 114, but may also be designed in different shapes to adjust the light emission direction of the light emitting diode chip 114. In certain embodiments, the packaging material 118 comprises a wavelength converting material 119, such as fluorescent powder or quantum dot material. Light from the light emitting diode chip 114 is absorbed by the wavelength conversion material 119, and the wavelength conversion material 119 further emits light of another color, thereby modifying the light emission color of the light emitting diode module. The structure of the light emitting device 110 in FIG. 3 is merely an example, and is not intended to limit the present invention. Those skilled in the art can flexibly select the structure of the light emitting device 110 according to actual demand.

  In one embodiment, the parameters of the light collection system 130 and the light divergence system 120 can be designed to achieve the objective of creating a wide and uniform illumination area. Table 1 shows the parameter values of each element of one embodiment of the present invention. The surface of each element in FIG. 1 (the reflecting surface 122 from the light emitting element 110 to the light divergence system 120 is sequentially from the surface 1 to the surface 6). That is, the light emitting surface of the light emitting element 110 is the surface 1, the surface close to the light emitting element 110 of the convex lens 132 of the light collecting system 130 is the surface 2, and the convex lens 134 of the convex lens 132 of the light collecting system 130 is The adjacent surface is the surface 3, the surface close to the convex lens 132 of the convex lens 134 of the light collecting system 130 is the surface 4, and the surface close to the light diverging system 120 of the convex lens 134 of the light collecting system 130 is the surface 5. , The radius of curvature of the light diverging system 120 is the surface 6), the distance (or thickness) between each surface and the next surface, the refractive index and the Abbe number.Further, the coordinates of the surface 2 to the surface 4 are expressed by the equation (1), and the coefficients k, A2, A4. . . A16, c indicates the curvature, and the surface 5 is represented by equation (2) and the coefficients B1, B2. . . Includes B8.

  In this embodiment, B1 = 0.52333, B2 = 0.06588, B3 = −1.524E-03, B4 = 2.417E-04, B5 = −6.918E-06, B6 = −1. 215E-07, B7 = -1.202E-09 and B8 = 4.847E-12. The area of the light emitting surface (ie, surface 1) of the light emitting element 110 is 4 millimeters × 4 millimeters. FIG. 4 is an illumination luminance diagram simulated on the projection surface by the parameters in Table 1 and paragraph [0027], in which the wide-angle illumination light source is located at the origin (that is, the location where the coordinates are (0, 0)).

  Next, please refer to FIG. 5 and FIG. FIG. 5 is a schematic view of a wide-angle illumination light source and a projection surface 900 according to another embodiment of the present invention, and FIG. 6 is a front view of the reflecting structure 140 of FIG. In this embodiment, the wide-angle illumination light source further includes a reflective structure 140 disposed at least between the light emitting element 110 and the light collecting system 130 and between the light collecting system 130 and the light diverging system 120. For example, as shown in FIG. 6, the reflecting structure 140 may be a reflecting mirror having a plurality of through holes 142, 144 and 146 for fitting the light collecting system 130 and the light diverging system 120. Specifically, the convex lens 132 of the light collecting system 130 is fitted into the through hole 142, the convex lens 134 of the light collecting system 130 is fitted into the through hole 144, and the light diverging system 120 is fitted into the through hole 146.

  However, the fixed relationship between the reflecting structure 140 and other elements is not limited to FIGS. 5 and 6. FIG. 7 is a schematic diagram of a wide-angle illumination light source and a projection surface 900 according to still another embodiment of the present invention. In FIG. 7, after the light collection system 130 and the light divergence system 120 are cut (for example, a part of the light collection system 130 and the light divergence system 120 located in the left half of the reflection structure 140 in FIG. 5 are cut). Further, the light collecting system 130 and the light diverging system 120 in the right half portion may be fixed to the reflecting structure 140. Specifically, the convex lens 132 of the light collection system 130 has a contact surface 133 that may be a cut surface that cuts the convex lens 132 of FIG. 5 in half. The convex lens 134 of the light collection system 130 has a contact surface 135 that may be a cut section that cuts the convex lens 134 of FIG. 5 in half. The convex lens 132 is fixed to the reflective structure 140 by the contact surface 133, and the convex lens 134 is fixed to the reflective structure 140 by the contact surface 135. The optical axis O of the light collection system 130 is located on the contact surface 133 and / or the contact surface 135. On the other hand, the light divergence system 120 has a contact surface 129 that may be a cut surface that cuts the light divergence system 120 of FIG. 5 in half. The light divergence system 120 is secured to the reflective structure 140 by a contact surface 129. The optical axis O of the light collection system 130 may be located on the contact surface 129.

  5 and FIG. 7, after adding the reflection structure 140, the light beam 112 to be transmitted to the left side of the original FIG. 5 and FIG. 7 is reflected to the right side by the reflection structure 140 and further onto the projection surface 900. Can be projected. In this way, the light beam 112 can be concentrated and irradiated on the right projection surface 900. In addition, in order to increase the use efficiency of the light beam 112, the light emitting element 110 can be installed so as to be shifted from the optical axis O of the light collection system 130, for example, to be deflected to the right side of FIGS. Can be done. In this way, the light beam 112 transmitted to the left side of the light emitting element 110 can be reflected to the right side by the reflection structure 140. The wide-angle illumination light source of the present embodiment can be applied to, for example, an outdoor advertising billboard, can be installed at the edge of the advertising billboard, and can be projected obliquely onto the advertising billboard, that is, the projection surface 900 is an advertisement. It is a signboard. Since the wide-angle illumination light source can provide a wide and uniform illumination area, even a small amount (for example, one) of the wide-angle illumination light source can illuminate the entire advertising billboard, which has the effect of saving power. FIG. 8 is an irradiation luminance diagram simulated on the projection surface 900 of the wide-angle illumination light source in FIG. 5, and the wide-angle illumination light source is located at the origin (that is, the location where the coordinates are (0, 0)). Other structural details of the embodiment of FIGS. 5 and 7 are the same as the embodiment of FIG. 1 and will not be repeated.

  Next, please refer to FIG. 9 and FIG. 9 is a schematic diagram of a wide-angle illumination light source and a projection surface 900 according to still another embodiment of the present invention, and FIG. 10 is an exploded view of the wide-angle illumination light source of FIG. In the present embodiment, the wide-angle illumination light source further includes a light stand 150. All of the light emitting element 110, the light divergence system 120, and the light collection system 130 are fixed to the light stand 150. The light stand 150 is for fixing the light emitting element 110, the light divergence system 120, and the light collection system 130 to the projection surface 900. Specifically, the light stand 150 may include a fixed portion 152 and at least one support portion 154. For example, in the present embodiment, there are three support portions 154, but the present invention is not limited to this. The fixing unit 152 is fixed to the projection surface 900 and has a storage space 153. Both the light emitting element 110 and the light collection system 130 are installed in the storage space 153, and a part of the light collection system 130 is exposed from the storage space 153. The support unit 154 fixes the light divergence system 120 to the fixing unit 152, thereby fixing the distance between the light divergence system 120 and the light collection system 130. For example, the light divergence system 120 further includes a base 128, and opposite ends 155 a and 155 b of each support portion 154 are fixed to the base 128 and the fixing portion 152 of the light divergence system 120, respectively. However, the structure of the light stand 150 of this embodiment is merely an example, and is intended to limit the present invention. Those skilled in the art can flexibly design the structure of the light stand 150 according to actual demand. In other embodiments, the reflective structure 140 is secured to the light stand 150 (shown in FIG. 11) to achieve the illumination area shown in FIG. Other structural details of the embodiment of FIGS. 9-11 are the same as the embodiment of FIG. 1 and will not be described again.

  As described above, since the wide-angle illumination light source of each of the above embodiments converges the light beam of the light emitting element by the condensing system and guides the light beam to the light divergence system, the light use efficiency can be increased, and A light beam that is wide and uniform on the projection surface at a short distance can be generated. In addition, it is possible to control the range and direction of the irradiation area by adding a reflection structure, and reuse the light rays by using the reflection of the reflection structure. In addition, the light stand can fix the light emitting element, the light divergence system, and the light collection system to the projection surface. Since the light stand has a simple structure, assembly time and cost can be reduced.

  Although the embodiments of the present invention have been disclosed as described above, this is not intended to limit the present invention, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is based on what is specified in the subsequent claims.

DESCRIPTION OF SYMBOLS 110 Light emitting element 112 Light beam 114 Light emitting diode chip 115 Wire material 116 Holder 118 Packaging material 119 Wavelength conversion material 120 Light divergence system 122 Reflective surface 124 Bottom 125 Cross section 126 Side 128 Base 129, 133, 135 Contact surface 130 Condensing system 132, 134 Convex lens 140 Reflective structure 142, 144, 146 Through hole 150 Light stand 152 Fixing part 153 Storage space 154 Supporting part 155a, 155b End 900 Projection surface O Optical axis P Vertex W Width

Claims (17)

A light emitting device for providing a light beam;
A light divergence system having a width that gradually decreases toward the light emitting element;
A light collection system disposed between the light emitting element and the light divergence system, wherein the light collection system is used to focus the light rays of the light emitting element onto the light divergence system, and the light. A diverging system projects the light beam that has passed through the condensing system onto a projection surface, and the light emitting element is installed between the projection surface and the light diverging system ,
A wide-angle illumination light source further comprising a reflective structure installed at least between the light emitting element and the light collecting system and between the light collecting system and the light diverging system.
Wide-angle illumination light source.   The wide-angle illumination light source according to claim 1, wherein the light beam having passed through the light collecting system exceeding 70% is incident on the light diverging system.   The wide-angle illumination light source according to claim 1, wherein the light divergence system has an aspheric reflecting surface facing the light emitting element.   The wide-angle illumination light source according to claim 1, wherein the light divergence system is a tapered reflective element whose apex faces the light emitting element.   The wide-angle illumination light source according to claim 4, wherein a cross section from the apex of the tapered reflective element to the bottom of the tapered reflective element has at least one curved side.   The wide-angle illumination light source according to claim 1, wherein the light beam provided by the light emitting element exceeding 70% is incident on the light collecting system.   The wide-angle illumination light source according to claim 1, wherein the condensing system includes a convex lens, a concave lens, a compound parabolic concentrator, or a combination thereof.   The wide-angle illumination light source according to claim 1, wherein the light emitting element is located on an optical axis of the light collecting system. The wide-angle illumination light source according to claim 1 , wherein the light emitting element is installed so as to deviate from an optical axis of the light collection system. The wide-angle illumination light source according to claim 1 , wherein the reflection structure has a plurality of through holes for fitting the light collection system and the light divergence system. The wide-angle illumination light source according to claim 1 , wherein the light collection system has at least one contact surface, is fixed to the reflective structure by the contact surface, and an optical axis of the light collection system is located on the contact surface. . The wide-angle illumination light source according to claim 1 , wherein the light divergence system has a contact surface, is fixed to the reflecting structure by the contact surface, and an optical axis of the light collection system is located on the contact surface.   The light emitting device, the light diverging system, and the light collecting system are all fixed, and further includes a light stand for fixing the light emitting device, the light diverging system, and the light collecting system to the projection surface. The wide-angle illumination light source described. The wide-angle illumination light source according to claim 13 , wherein the light stand includes a fixing unit installed on the projection surface and a support unit that fixes the light divergence system to the fixing unit. The wide-angle illumination light source according to claim 14 , wherein both the light emitting element and the light collecting system are installed, and the fixing portion has a storage space that exposes a part of the light collecting system. The wide-angle illumination light source according to claim 14 , wherein the light divergence system includes a base, and both opposite ends of the support portion are fixed to the base and the fixing portion, respectively. The wide-angle illumination according to claim 13 , further comprising a reflective structure that is installed at least between the light emitting element and the light collecting system and between the light collecting system and the light diverging system and fixed to the light stand. light source.