TWI630344B - Wide-angle illuminating light source - Google Patents

Abstract

A wide-angle illumination source comprising a light-emitting element, a diverging light system and a light collecting system. The illuminating element is used to provide light. The diverging light system has a width that substantially tapers toward the light emitting elements. The light collecting system is placed between the light emitting element and the diverging light system. The light collecting system is used to concentrate the light of the light emitting element to the diverging light system, and the diverging light system is used to project the light passing through the light collecting system to the projection surface. The illuminating element is placed between the projection surface and the diverging light system.

Description

Wide-angle illumination source

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

Indirect lighting has been widely used in interior design and architectural decoration in recent years. Indirect lighting produces softer light than direct illumination of bright, glaring light, making it feel more relaxed. However, indirect lighting can improve the comfort of the space, but it has the disadvantages of poor lighting efficiency, small illumination angle range, uneven illumination and complex decoration structure.

In addition, outdoor large-scale advertising billboards are generally directly illuminated by the light source to the kanban to achieve the purpose of illumination. The light source needs to be erected away from the kanban to achieve a more uniform illumination area. However, multiple sets of light sources are required to achieve the desired brightness. Even if multiple sets of light sources are irradiated at a long distance, there is a problem that the irradiation area is not uniform.

The present disclosure provides a wide-angle illumination source comprising a light-emitting element, a divergent light system, and a light collection system. The illuminating element is used to provide light. The diverging light system has a width that substantially tapers toward the light emitting elements. The light collecting system is placed between the light emitting element and the diverging light system. The light collecting system is used to concentrate the light of the light emitting element to the divergent light system, and the diverging light system is used to project the light passing through the light collecting system to a projection surface. The illuminating element is placed between the projection surface and the diverging light system.

In one or more embodiments, greater than 70% of the light passing through the collection system is incident on the divergent light system.

In one or more embodiments, the divergent light system has an aspherical reflective surface facing the light emitting element.

In one or more embodiments, the divergent light system is a tapered reflective element. The apex of the tapered reflective element 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, greater than 70% of the light provided by the illuminating elements is incident on the concentrating system.

In one or more embodiments, the concentrating system comprises a convex lens, a concave lens, a compound parabolic concentrator, or a combination thereof.

In one or more embodiments, the illuminating elements are located on the optical axis of the concentrating system.

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

In one or more embodiments, the light emitting elements are offset from the optical axis setting of the light collecting system.

In one or more embodiments, the reflective structure has a plurality of through holes for embedding the light collecting system with the diverging light system.

In one or more embodiments, the light collecting system has at least one contact surface. The light collecting system is fixed on the reflective structure by the contact surface, and the optical axis of the light collecting system is located on the contact surface.

In one or more embodiments, the divergent light system has a contact surface. The diverging light system is fixed to the reflective structure by the contact surface. The optical axis of the light collecting system is located on the contact surface.

In one or more embodiments, the wide-angle illumination source further includes a light fixture. The illuminating element, the diverging light system and the concentrating system are all fixed on the lamp holder. The light fixture is used to fix the light-emitting element, the diverging light system and the light collecting system to the projection surface.

In one or more embodiments, the light fixture includes a fixed portion and a support portion. The fixing portion is on the projection surface, and the supporting portion fixes the divergent light system to the fixing portion.

In one or more embodiments, the fixing portion has an accommodating space. The illuminating element and the concentrating system are both placed in the accommodating space, and a part of the concentrating system is exposed from the accommodating space.

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

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

The wide-angle illumination source of the above embodiment can effectively project the light of the light-emitting element onto the projection surface to produce a uniform and large-area light.

The embodiments of the present disclosure are disclosed in the following drawings, and for the sake of clarity, many of the details of the practice will be described in the following description. However, it should be understood that these practical details are not intended to limit the disclosure. That is, in some embodiments of the disclosure, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

FIG. 1 is a schematic diagram of a wide-angle illumination source and a projection surface 900 according to an embodiment of the present invention. The wide-angle illumination source includes a light-emitting element 110, a divergent light system 120, and a light collection system 130. Light emitting element 110 is used to provide light 112. The diverging light system 120 has a width W that substantially tapers toward the light emitting element 110. Light collecting system 130 is disposed between light emitting element 110 and divergent light system 120. The light collecting system 130 is used to concentrate the light 112 of the light emitting element 110 to the divergent light system 120, and the diverging light system 120 is used to project the light 112 passing through the light collecting system 130 to a projection surface 900. Light emitting element 110 is placed between projection surface 900 and divergent light system 120.

For the sake of clarity, only the path of the partial ray 112 is shown in FIG. In addition, the light collecting system 130 can be a transparent material, so the light 112 can pass through the interior of the light collecting system 130, and the diverging light system 120 can have a reflecting surface 122 (described later), so the light 112 shown in FIG. 1 is The surface of the diverging light system 120 (i.e., the reflecting surface 122) is reflected.

In this paper, "substance" is used to modify any slightly changeable relationship, but such slight changes do not change its nature. For example, "the divergent light system 120 has a width W that substantially tapers toward the light-emitting element 110." This description, except that the width W of the divergent light system 120 is indeed tapered toward the light-emitting element 110, as long as the light-emitting system 120 is diverging. The width W is substantially reduced toward the light-emitting element 110, and the width W of the diverging light system 120 may be slightly increased or decreased in some sections of the diverging light system 120, or may be slightly reduced and increased.

The wide-angle illumination source of the present embodiment can effectively project the light 112 of the light-emitting element 110 onto the projection surface 900 to produce a uniform and wide angle and a wide range of illumination area. Specifically, the light ray 112 provided by the illuminating element 110 enters the concentrating system 130. The light collecting system 130 concentrates the light rays 112, that is, the light rays 112 that penetrate the light collecting system 130 have a smaller divergence angle than the light rays 112 of the incident light collecting system 130. Such a structure can effectively concentrate the light 112 provided by the light-emitting element 110 to the divergent light system 120 to increase the efficiency of use of the light 112. Next, the light 112 that penetrates the light collecting system 130 is incident on the diverging light system 120, and the diverging light system 120 reflects the light 112 to the projection surface 900 located behind the light emitting element 110. Since the diverging light system 120 has a width W that substantially tapers toward the light emitting element 110, the divergence angle of the light 112 can be increased to increase the illumination area of the light 112. Light ray 112 projected onto projection surface 900 can be indirectly illuminated by scattering. In this way, with the wide-angle illumination source of the present embodiment, a large and uniform illumination area can be generated on the projection surface 900 within a short distance.

In some embodiments, more than 70% of the light 112 provided by the illuminating element 110 enters the concentrating system 130, that is, the concentrating system 130 collects most of the light 112 provided by the illuminating element 110, so the concentrating system 130 can The rays 112 converge and are directed to the divergent light system 120. In addition, since the light collecting system 130 concentrates the light rays 112, more than 70% of the light rays 112 passing through the light collecting system 130 are incident on the diverging light system 120, so that the diverging light system 120 can effectively direct most of the light rays 112 to the projection. Face 900.

The specific structure of the divergent light system 120 in some embodiments is described next. In FIG. 1, the diverging light system 120 has an aspherical reflecting surface 122 facing the light emitting element 110 and the light collecting system 130. The reflective surface 122 is used to reflect the light 112 to the projection surface 900. The reflective surface 122 can be designed according to actual needs such that the reflective surface 122 is aspherical to produce a uniform illumination area on the projection surface 900.

Please refer to FIG. 2, which is a cross-sectional view of the diverging astigmatism system 120 of FIG. 1 in some embodiments. For example, the divergent light system 120 can be a tapered reflective element, such as a conical reflective element or a polygonal conical reflective element, and the disclosure is not limited thereto. The tapered reflective element has opposing vertices P and 124, and the apex P faces the light emitting element 110 (as shown in Figure 1). In the present embodiment, the width W of the divergent light system 120 is defined as the diameter of each cross section substantially parallel to the face of the bottom 124. For example, the width W indicated 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 reflecting element is substantially reduced toward the apex P.

To further create a uniform illumination area, the curvature of the sides of the tapered reflective element can be designed. In Fig. 2, the profile 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 non-linear. In some embodiments, the side 126 can be curved toward the exterior of the tapered reflective element (as shown in FIG. 2), curved toward the interior of the tapered reflective element, or undulating, irregular, depending on actual needs. set. The shape of the astigmatism system 120 of Fig. 2 is merely illustrative and is not intended to limit the disclosure. Those skilled in the art will be able to flexibly design the shape of the divergent light system 120, depending on actual needs.

Please return to Figure 1. In some embodiments, the illuminating element 110 is located on the optical axis O of the concentrating system 130. In other words, the optical axis O of the concentrating system 130 passes through the illuminating element 110. Such an arrangement provides a more symmetrical illumination on the projection surface 900. The area, for example, can be applied to indoor lighting, so the projection surface 900 can be a ceiling or a wall. In addition, the diverging light system 120 can also be located on the optical axis O of the light collecting system 130, that is, the light emitting element 110, the light collecting system 130, and the diverging light system 120 can be arranged in a line.

Additionally, the light collection system 130 includes at least one lens, such as two convex lenses 132, 134, as shown in FIG. In other embodiments, however, the light collection system 130 can include a convex lens, a concave lens, a Compound Parabolic Concentrator (CPC), or a combination thereof. In some embodiments, the surfaces of the convex lenses 132, 134 may be spherical, aspherical, or free-form surfaces, depending on the actual situation.

In some embodiments, the light emitting element 110 can be a light emitting diode, a laser, or other suitable light source. For example, please refer to FIG. 3, which is a cross-sectional view of the light-emitting element 110 of FIG. The light-emitting element 110 of FIG. 3 is a light-emitting diode module including a light-emitting diode wafer 114, a bracket 116 and a package material 118. The LED wafer 114 can be electrically connected to the bracket 116 by the wire 115, and the package 118 covers the LED wafer 114. The package material 118 can not only protect the LED chip 114 but also be designed differently. The shape is adjusted to adjust the light outgoing direction of the LED wafer 114. In some embodiments, the encapsulant 118 comprises a wavelength converting material 119, such as a phosphor powder or quantum dot material. The light emitted by the LED chip 114 can be absorbed by the wavelength converting material 119, and the wavelength converting material 119 emits light of other colors, thereby changing the color of the light emitted by the LED module. The structure of the light-emitting element 110 of FIG. 3 is merely illustrative and is not intended to limit the disclosure. Those skilled in the art can flexibly select the structure of the light-emitting element 110 according to actual needs.

In one embodiment, the parameters of the light collection system 130 and the divergent light system 120 can be designed to achieve a broad and uniform illumination area. Table 1 is a parameter value of each component of the embodiment, which includes the surface of each component of FIG. 1 (the reflective surface 122 from the light-emitting component 110 to the divergent light system 120 is sequentially surface 1 to surface 6, that is, The light emitting surface of the light emitting element 110 is the surface 1, the surface of the convex lens 132 of the light collecting system 130 is close to the surface of the light emitting element 110, the surface of the convex lens 132 of the light collecting system 130 is close to the surface of the convex lens 134, and the surface 3 is a convex lens of the light collecting system 130. The surface of the 134 near the convex lens 132 is the surface 4, the surface of the convex lens 134 of the light collecting system 130 near the surface of the divergent light system 120 is the surface 5, and the reflecting surface 122 of the divergent light system 120 is the radius of curvature of the surface 6), the surface and the next The distance (or thickness) of the surface, the refractive index and the Abbe number. In addition, the coordinates of the surface 2 to the surface 4 are expressed by the equation (1), which includes the coefficients k, A2, A4 to A16, c represents the curvature, and z represents the distance of the point on the surface from the optical axis direction to the vertex of the curved surface, and r represents the point. The vertical height with the optical axis; and the surface 5 is represented by equation (2), which contains coefficients B1, B2 to B8.

z = B 1 r + B 2 r ² + B 3 r ³ + B 4 r ⁴ + B 5 r ⁵ + B 6 r ⁶ + B 7 r ⁷ + B 8 r ⁸ (2)

In addition, in the present embodiment, B1=0.35233, 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 of the light emitting element 110 (ie, the surface 1) is 4 Mm x 4 mm. Fig. 4 is a graph showing the illumination luminance on the projection surface according to the parameters of Table 1 and paragraph [0027], wherein the wide-angle illumination source is located at the origin (i.e., at coordinates (0, 0)).

Referring to FIG. 5 and FIG. 6 , FIG. 5 is a schematic diagram of a wide-angle illumination source and a projection surface 900 according to another embodiment of the present disclosure, and FIG. 6 is a front view of the reflective structure 140 of FIG. 5 . In the present embodiment, the wide-angle illumination source further includes a reflective structure 140 disposed between at least the light-emitting element 110 and the light collecting system 130 and between the light collecting system 130 and the diverging light system 120. For example, as shown in FIG. 6, the reflective structure 140 can be a mirror having a plurality of through holes 142, 144 and 146 for embedding the light collecting system 130 with the diverging light system 120. In detail, the convex lens 132 of the light collecting system 130 is embedded in the through hole 142, the convex lens 134 of the light collecting system 130 is embedded in the through hole 144, and the divergent optical system 120 is embedded in the through hole 146.

However, the fixed relationship of the reflective structure 140 to other components is not limited to the fifth and sixth figures. FIG. 7 is a schematic diagram of a wide-angle illumination source and a projection surface 900 according to still another embodiment of the present disclosure. In FIG. 7, the light collection system 130 and the diverging light system 120 can be cropped (eg, the partial light collection system 130 and the diverging light system 120 located in the left half of the reflective structure 140 in FIG. 5 are cropped). The partial light collecting system 130 and the divergent light system 120 of the right half may be fixed to the reflective structure 140. In detail, the convex lens 132 of the light collecting system 130 has a contact surface 133, and the contact surface 133 may be a cutting surface that cuts the convex lens 132 of FIG. The convex lens 134 of the light collecting system 130 has a contact surface 135 which can be a cutting surface for cutting the convex lens 134 of FIG. The convex lens 132 is fixed to the reflective junction by the contact surface 133 The structure 140 is fixed, and the convex lens 134 is fixed to the reflective structure 140 by the contact surface 135. The optical axis O of the light collecting system 130 is located on the contact surface 133 and/or the contact surface 135. On the other hand, the diverging light system 120 has a contact surface 129 which can be a cutting surface that cuts the diverging light system 120 of Fig. 5 into half. The diverging light system 120 is secured to the reflective structure 140 by a contact surface 129. The optical axis O of the light collecting system 130 can be located on the contact surface 129.

In the fifth and seventh embodiments, after the reflective structure 140 is added, the light ray 112 originally intended to propagate to the left side of the fifth and seventh figures can be reflected by the reflective structure 140 to the right side and then to the projection surface 900. In this way, the light 112 can be concentratedly illuminated to the projection surface 900 on the right side. In addition, in order to increase the efficiency of use of the light ray 112, the light-emitting element 110 may be offset from the optical axis O of the light collecting system 130, for example, to the right side of FIGS. 5 and 7. As a result, the light ray 112 propagating to the left side of the light-emitting element 110 can be reflected by the reflective structure 140 to the right side. The wide-angle illumination source of the present embodiment can be applied, for example, to an outdoor viewing version. The wide-angle illumination source can be placed on the edge of the advertisement viewing version, and obliquely hits the advertisement viewing version, that is, the projection surface 900 is an advertisement viewing version. Since the wide-angle illumination source provides a large and uniform illumination area, a small number (for example, one) of wide-angle illumination sources can illuminate the entire advertising version, saving energy. Figure 8 is a perspective view of the illumination of the wide-angle illumination source of Figure 5 on the projection surface 900, where the wide-angle illumination source is at the origin (i.e., at coordinates (0, 0)). Other structural details of the fifth and seventh embodiments are the same as those of the first embodiment, and therefore will not be described again.

Referring to FIG. 9 and FIG. 10 , FIG. 9 is a schematic diagram of a wide-angle illumination source and a projection surface 900 according to still another embodiment, and FIG. 10 is an exploded view of the wide-angle illumination source of FIG. 9 . In the present embodiment, the wide angle photo The light source further includes a light stand 150. The light-emitting element 110, the diverging light system 120, and the light collecting system 130 are all fixed to the lamp holder 150. The light fixture 150 is used to fix the light emitting element 110, the diverging light system 120, and the light collecting system 130 to the projection surface 900. In detail, the lamp holder 150 may include a fixing portion 152 and at least one supporting portion 154. For example, in the present embodiment, there are three support portions 154, but the disclosure is not limited thereto. The fixing portion 152 is fixed on the projection surface 900 and has an accommodating space 153. The illuminating element 110 and the concentrating system 130 are both disposed in the accommodating space 153, and a part of the concentrating system 130 is exposed from the accommodating space 153. The support portion 154 secures the diverging light system 120 to the fixed portion 152, thereby fixing the distance between the divergent light system 120 and the light collecting system 130. For example, the divergent light system 120 further includes a base 128. The opposite ends 155a, 155b of each support portion 154 are respectively fixed to the base 128 and the fixing portion 152 of the divergent light system 120. However, the structure of the lamp holder 150 of the present embodiment is merely illustrative and is not intended to limit the disclosure. Those skilled in the art can flexibly design the structure of the lamp holder 150 according to actual needs. In other embodiments, the reflective structure 140 can be secured to the light fixture 150 (as shown in FIG. 11) to achieve an illuminated area as shown in FIG. Other structural details of the embodiment of Fig. 9 to Fig. 11 are the same as those of the embodiment of Fig. 1, and therefore will not be described again.

In summary, since the wide-angle illumination source of each of the above embodiments utilizes a light collecting system to collect light of the light-emitting element, the light collecting system directs the light to the divergent light system, thereby increasing light use efficiency and projecting in a short distance. Large and uniform light is produced on the surface. Furthermore, a reflective structure can be added to control the range and direction of the illumination area, and the reflection of the reflective structure can be utilized to re-light the light. use. In addition, the lamp holder can fix the light-emitting element, the diverging light system and the light collecting system to the projection surface, and has a simple structure, thereby simplifying assembly time and cost.

The present disclosure has been disclosed in the above embodiments, and is not intended to limit the disclosure. Any one skilled in the art can make various modifications and retouchings without departing from the spirit and scope of the disclosure. The scope is subject to the definition of the scope of the patent application attached.

110‧‧‧Lighting elements

112‧‧‧Light

114‧‧‧Light Emitter Wafer

115‧‧‧Wire

116‧‧‧ bracket

118‧‧‧Package

119‧‧‧wavelength conversion materials

120‧‧‧Diffuse light system

122‧‧‧reflecting surface

124‧‧‧ bottom

125‧‧‧ profile

126‧‧‧ side

128‧‧‧Base

129, 133, 135‧‧ ‧ contact surface

130‧‧‧Light collecting system

132, 134‧‧ ‧ convex lens

140‧‧‧Reflective structure

142, 144, 146‧‧‧ through holes

150‧‧‧Light stand

152‧‧‧ Fixed Department

153‧‧‧ accommodating space

154‧‧‧Support

155a, 155b‧‧‧

900‧‧‧projection surface

O‧‧‧ optical axis

P‧‧‧ vertex

W‧‧‧Width

1, 2, 3, 4, 5, 6‧‧‧ surface

FIG. 1 is a schematic diagram of a wide-angle illumination source and a projection surface according to an embodiment of the present invention. Figure 2 is a cross-sectional view of the diverging astigmatism system of Figure 1 in some embodiments. Fig. 3 is a cross-sectional view showing the light-emitting element of Fig. 1. Fig. 4 is a graph showing the illumination luminance on the projection surface according to the parameters of Table 1 and paragraph [0027]. FIG. 5 is a schematic diagram of a wide-angle illumination source and a projection surface according to another embodiment of the present disclosure. Figure 6 is a front elevational view of the reflective structure of Figure 5. FIG. 7 is a schematic diagram of a wide-angle illumination source and a projection surface according to still another embodiment of the present disclosure. Figure 8 is a graph showing the illumination intensity of the wide-angle illumination source on the projection surface in Fig. 5. FIG. 9 is a schematic diagram of a wide-angle illumination source and a projection surface according to still another embodiment. Figure 10 is an exploded view of the wide-angle illumination source of Figure 9. FIG. 11 is a schematic diagram of a wide-angle illumination source and a projection surface according to another embodiment of the present disclosure.

Claims (17)

A wide-angle illumination source comprising: a light-emitting element for providing a light; a light-emitting system having a width that substantially tapers toward the light-emitting element; and a light collecting system disposed between the light-emitting element and the divergent light system The light collecting system is configured to collect the light of the light emitting element into the divergent light system, and the diverging light system is configured to project the light passing through the light collecting system to a projection surface, and the light emitting element is placed The projection surface is interposed between the projection surface and the diverging light system; and a reflective structure is disposed between the light emitting element and the light collecting system and between the light collecting system and the diverging light system. The wide-angle illumination source of claim 1, wherein greater than 70% of the light passing through the collection system is incident on the divergent light system. The wide-angle illumination source of claim 1, wherein the divergent light system has an aspherical reflective surface facing the light-emitting element. The wide-angle illumination source of claim 1, wherein the divergent light system is a tapered reflective element, the apex of the tapered reflective element facing the light-emitting element. A wide-angle illumination source as claimed in claim 4, wherein 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. The wide-angle illumination source of claim 1, wherein greater than 70% of the light provided by the illuminating element is incident on the concentrating system. The wide-angle illumination source of claim 1, wherein the concentrating system comprises a convex lens, a concave lens, a compound parabolic concentrator or a combination thereof. The wide-angle illumination source of claim 1, wherein the illuminating element is located on an optical axis of the concentrating system. The wide-angle illumination source of claim 1, wherein the illuminating element is offset from an optical axis setting of the concentrating system. The wide-angle illumination source of claim 1, wherein the reflective structure has a plurality of through holes for the light collecting system to be embedded in the divergent light system. The wide-angle illumination source of claim 1, wherein the light collecting system has at least one contact surface, and the light collecting system is fixed on the reflective structure by the contact surface, and an optical axis of the light collecting system is located at the contact surface on. The wide-angle illumination source of claim 1, wherein the divergent light system has a contact surface, and the diverging light system is fixed on the reflective structure by the contact surface, and an optical axis of the light collecting system is located on the contact surface . The wide-angle illumination source of claim 1, further comprising a light fixture, the light-emitting component, the diverging light system and the light collecting system are fixed on the light fixture, the light fixture is used for the light-emitting component, the hairlight An astigmatism system and the concentrating system are fixed to the projection surface. The wide-angle illumination source of claim 13, wherein the lamp holder comprises a fixing portion and a supporting portion on the projection surface, the supporting portion fixing the divergent light system to the fixing portion. The wide-angle illumination source of claim 14, wherein the fixing portion has an accommodating space, and the illuminating element and the concentrating system are disposed in the accommodating space, and a part of the concentrating system is from the accommodating space Exposed. The wide-angle illumination source of claim 14, wherein the divergent light system comprises a base, and opposite ends of the support portion are respectively fixed to the base and the fixing portion. The wide-angle illumination source of claim 13, wherein the reflective structure is fixed to the light fixture.