TW201213726A - Light source module - Google Patents

Abstract

A light source module including a light emitting element, an adjustable imaging system, and a light shape adjustment element is provided. The light emitting element is suitable for emitting a light beam. The adjustable imaging system is disposed on the transmission path of the light beam to change the degree of convergence and divergence of the light beam. The light shape adjustment element is disposed on the transmission path of the light beam from the adjustable imaging system. The light shape adjustment element includes a hole and a refractive material surrounding the hole. The shape of the hole is different from that of the refractive material. The adjustable imaging system is suitable for changing the degree of convergence and divergence of the light beam to centralize the light beam on the hole to pass through the hole, or make the light beam pass through both the refractive material and the hole.

Description

35539twf.doc/I 201213726 / 9 VI. Description of the Invention: [Technical Field] The present invention relates to a light source module, and more particularly to a light source module including a light-transforming element. [Prior Art] There are two methods for the light pattern of the conventional module towel. One of the methods is to switch the light shape by changing the distance between the light source and the light in the light source module. For example, in conventional flashlights, the purpose of the light shape is often switched by changing the distance between the bulb and the reflector. However, the light patterns switched by the above methods are all an axisymmetric light shape, which limits the application of such light source modules. Another method of switching the light shape is to use a light source module, the light source module includes a plurality of independent light sources at different positions, and the purpose of switching the light shape is achieved by controlling the switching of the independent light sources. For example, a light-emitting diode table lamp comprising a plurality of light-emitting diode sources, wherein a plurality of light-emitting diode wires are arranged, bribe = center of the circumference. When only the center of the lake is illuminated by two = ΐ, the light output of the light-emitting diode lamp is a smaller circle. When the light-emitting diode source is illuminated, the light shape of the light-emitting diode can be Switch to - larger circle. When using ί, ^, shape, the luminous flux of the output as a whole will change drastically, and the application of such a light source module is also limited. So how to design a light source module to switch its output light shape 201213726

r, ^W/8 35539twldoc^I is not limited to an axisymmetric light shape. Moreover, when the light source module switches the light shape, the overall luminous flux of the output does not change too much, which is one of the problems faced by the developers. SUMMARY OF THE INVENTION The present invention provides a light source module that can switch an output light shape. An embodiment of the invention provides a light source module. The light source module includes a light emitting element, an adjustable imaging system, and a light transforming element. The illuminating element is adapted to emit a light beam. The adjustable imaging system is disposed on the transmission path of the beam and is adapted to change the degree of convergence of the beam. The light transforming element is disposed on the transmission path of the light beam from the adjustable imaging system and includes an aperture and a refraction (four) around the open (four) light. The shape of the towel and the coffee is different from the shape of the light-refracting material. The adjustable imaging system is adapted to change the convergence of the beam. The degree of divergence of the beam is passed through the aperture, or the beam is simultaneously passed through the photorefractive material and the aperture. Based on the above, the light source mode & of the present invention can switch the output light shape by the combination of the image-adjusting system and the light-shape converting member. Further, the difference in luminous flux of the basin body can be effectively reduced between the rounded light patterns switched by the implementation of the present invention. The above described features and advantages of the present invention will be more apparent from the following description. Pay 5

35539twf.doc/I 201213726

- *·* ✓ V * V [Embodiment] [First Embodiment] Fig. 1A is a schematic diagram of a light source module of the present embodiment. Referring to FIG. 1A, the light source module 1000 of the present embodiment includes a light emitting element 100, an adjustable imaging system 200, and a light transforming element 300. Among them, the light-emitting element 1 emits a light beam L. In Fig. 1A, the optical axis of the light beam L is represented by the z-axis. The plane in which the light transforming element 300 is located is S. In the present embodiment, light-emitting element 100 emits a beam of light L which is first transmitted to adjustable imaging system 200. The light-emitting element 1 of the present embodiment is, for example, a light emitting diode (LED). However, the present invention is not limited thereto. In other embodiments, the light-emitting element 1 can also be a combination of a plurality of light emitting diodes (LEDs), and of course other suitable light-emitting elements or a combination thereof. In this embodiment, the adjustable imaging system 2 is disposed on the transmission path of the light beam L, and can change the light beam! The degree of convergence of ^. For example, the adjustable imaging system 2A of the present embodiment can include a movable optical element 202. The adjustable imaging system 200 of the present embodiment can change the degree of divergence of the light beam L by changing the distance D between the optical element 202 and the illuminating elements. Thus, the 'beam L' can be different on the plane S where the light-shaped conversion element 3 is located, but the invention is not limited thereto. In other embodiments, the adjustable imaging system can also include First, the focal lens 2H) (as shown in Figure 1B). This zoom lens 21() includes at least a zoom lens 212. The adjustable imaging system can change the focal length of the zoom lens by changing the position of the variable lens 212, so that the light beam L ^

201213726 tJ-yyu/8 35539tw-f.doc/I The degree of convergence divergence changes. Thus, (4) == two different areas of the plane S are formed = the position of the zoom lens lens is such that the focal length of the zoom lens becomes smaller: formed on the plane s where the light-shaped conversion element 300 is located - when the zoom lens is changed The position of 212 is such that when the distance of the zoom lens becomes larger, the beam L can be in the plane of the flat area where the wire is changed. The adjustable imaging system of the present invention is not limited to the above, and the adjustable imaging system 2 of the present invention may also be other suitable forms of adjustable imaging systems. The present embodiment is disposed on a transmission path from the beam L that is tuned to the system 200 (as shown by 胄ia). Figure f is the actual wire (4) component field schematic®. Referring to Fig. 2A, the light-shaped conversion element of the present embodiment includes an opening and tearing and a light-refractive material 3G4 surrounding the opening. It is particularly noteworthy that the shape of the opening 3〇2 is different from the shape of the photorefractive material 'material 304'. For example, the opening 302 of the embodiment is a circular opening, and the photorefractive material of the embodiment is a convex lens having an ellipsoid. 2B is a view of the light-shaped conversion element i of the present embodiment (in the direction of the positive Z direction), whereby the upper view can be more clearly understood, and the shape of the opening 3Q2 of the embodiment and the light-refractive material are known. The shape is not the same (five). Head 2C is a side view of the light-shaped element of the actual figure, (looking in the positive X direction). Fig. 2D is a light-shaped transform element of the present embodiment: side view is not intended (looking in the negative y direction). 2C and 2D, the photorefractive material of the present embodiment has a spherical surface S! and a plane S2' where the ellipsoidal surface S of the light-refractive material 304 is oriented toward the light-emitting element.

35539tw£doc/I 201213726 100. In the embodiment of the present invention, the convergence degree of the light beam L can be changed by the adjustable type (four) system, and the spot P area formed by the cake beam L on the plane _S where the filament element is located is small or equal to the opening 3〇2. Area (as shown in Figure 3A). In other words, the light beam L can be concentratedly passed through the opening 3〇2 and is not susceptible to the light refraction material 304, but is transmitted to a plane (x_y plane) perpendicular to the optical axis (z-axis) to form a spot p. This spot p, which has a light shape as shown in Fig. 3B, is an axisymmetric light shape that approximates a circle. The illuminance distribution of this spot p, on the y-axis, is shown in the diagram on the right side of Fig. 3B. The illuminance distribution of this spot P on the X-axis is as shown in the lower diagram of Fig. 3B. In addition, in this embodiment, the illuminating age of the light beam L can also be changed by the adjustable imaging system 200, so that the area of the spot p formed by the light beam L on the flat S of the light-shaped converting element 300 is larger than the opening arc. Area (as shown in Figure 3C). Further, in the case where the spot p area is larger than the opening area, the light beam L can pass through the opening 3 () 2 and the light refraction material 304 at this time, since the light beam B is affected by the light refraction material, = The beam L forms a shape that is no longer an I-axis symmetrical shape on a plane (a plane) that is straight to the wire (2-axis), but is a non-axisymmetric light shape that approximates the shape (ellipse) of the photorefractive material 枓304. As shown in Figure 3D. In the basin, the illuminance distribution of this spot ρ on the y-axis is shown in the diagram on the right side in Fig. 3D. The illuminance distribution of this spot P' on the X-axis is as shown in Fig. 3D #. Γ ^ m 越述知' in the 实实关巾' can be adjusted by the adjustable imaging system 200 /, the light-shaped transformation element 300, so that the light source module brain of this embodiment 201213726

------8 35539twf.doc/I $ Output light shape can be switched between axisymmetric and non-fourth light shapes arbitrarily. However, the 'light-shaped conversion element 300 of the present invention is not limited to that shown in FIGS. 2A to 2D. In another embodiment of the present invention, the light-shaped conversion element 3 (7) is also disposed in the transmission path of the light beam L from the adjustable imaging system. on. The light transforming element 310 can also include an aperture 312 and a photorefractive material 314 surrounding the aperture 312. However, the opening 312 is not limited to the above circular opening, and the opening 312 may be a polygonal opening. The light refraction material is not limited to the above-mentioned convex lens having an ellipsoidal surface, and the light refraction material 314 may be a convex lens having a spherical surface. . In more detail, the opening 312 of the light-shaped conversion element 31 is a square-shaped aperture. The light-refracting material 314 is a convex lens having a spherical surface, as shown in the perspective view of the light-shaped conversion element. Thus, it can be clearly seen from the above-mentioned light-shaped conversion element 310 that the shape of the opening 312 of the present embodiment is different from the shape of the light-refracting material 314. Fig. 4C is a side elevational view (viewed in the direction of the normal direction) of the light-shaped conversion element of the embodiment. Fig. 4D is a side elevational view of the light-shaped conversion element of the present embodiment (in the negative direction; In the present embodiment, the optical folding material 3H has a spherical surface & and a flat surface S4, wherein the spherical surface S3 of the light refraction material 314 faces the light emitting element 100, but the invention is not limited thereto. In another embodiment of the present invention described in the above paragraph, the convergence of the light beam 1 can be changed by the adjustable imaging system 200 so that the light beam L forms a spot on the plane s where the light conversion element 310 is located. The p-plane actively approaches the area of the square opening 312 (as shown in Figure 5A). In other words, the beam L can pass through the square opening 312 intensively and is slightly partially close to the square.

201213726 35539twf.doc/I The reflection of the light refracting material 314 of the hole 312 is transmitted to a plane W plane perpendicular to the optical axis (Z axis) to form a spot p, the spot p, and the light shape is as shown in FIG. 5B. , tf 'the light shape is - a non-axisymmetric light shape that is approximately square. The illuminance distribution of this spot P' on the y-axis is shown in the diagram on the right side in sb. The illuminance distribution of this spot P on the X-axis is as shown in the lower diagram of Fig. 5B. Similarly, in the above embodiment, the convergence divergence degree of the light beam L can also be changed by the adjustable imaging system 200, so that the spot area of the light beam L formed on the plane S where the light conversion element 310 is located is significantly larger than the square opening. Hole m area (as shown in the figure). Further, in the case where the area of the spot ρ is significantly larger than the area of the opening 312, the light beam L can pass through the square opening 312 and the light refracting material 314 at the same time. At this time, since the light beam L is significantly affected by the light refraction material 314, the light spot P' formed on the light beam LK (x_y plane) is no longer a square non-axisymmetric light shape, but is similar to light. The axisymmetric light shape of the outer shape (circular) of the refractive material 314 is as shown in Fig. 5D. Here, the illuminance distribution of the spot p on the y-axis is as shown in the diagram on the right side in Fig. 5D. The illuminance distribution of this spot p on the x-axis is as shown in the lower diagram of Fig. 5D. By combining the optically deformable element 310 and the adjustable imaging system 200 in another embodiment of the present invention, the output light shape of the light source module 1 任意 can also be arbitrarily in the non-axisymmetric light shape and the axisymmetric light shape. Switch between. In still another embodiment of the invention, the light transforming element 32 is also disposed on the path of the beam L from the adjustable imaging system 200. The light transforming component 320 can also include an opening 322 and a photorefractive material surrounding the opening

201213726 5 35539tvif.d〇c/I: The phosphorescent A refractive material Μ4 has opposite first-end and second-third light-refractive materials 324 at the first end cross section & a polygonal line CL ' and the ridge line CL respectively Extending from a plurality of vertices T of the polygon to the second end. Preferably, the light refraction material resembles the shape of the cut: the shape of the opening 322 is substantially the same. The schematic diagram of the first refracting material 24 is, for example, as shown in FIG. 6A, and the material Lit is formed by the material Lit 324 at the end-end section & a rectangle, a light-folded t ^ ridge line CL, and the ridge line CL respectively from the polygon The apex T of the evening extends to the second end. Further, the shape of the light refraction material like the cross section s6 at the second end is substantially the same as the shape (circular shape) of the opening 322. Thus, the upper view of the light-shaped conversion element 320 (Fig. 6B) clearly shows that the shape of the opening 322 of the present embodiment is different from the shape of the light-refracting material 324. Fig. 6C is a side elevational view (viewed in the direction of the positive direction) of the light-shaped conversion element of the present embodiment. Fig. 3 is a side view of the light-shaped conversion element of the present embodiment (looking toward the negative y direction). 6C and FIG. 6D, the photorefractive material 324 of the present embodiment has a first end section Ss and a second end wearing surface, and the first end wearing surface of the calf refractive material 34: § 5 faces the light emitting element 100, but The invention is not limited thereto. In a further embodiment of the invention described in the above paragraph, the degree of convergence of the light beam L can also be changed by the adjustable imaging system 200 such that the light beam L is located at the light-shaped conversion element 320. The area of the spot P formed on the plane s is smaller than or equal to the area of the circular opening 322 (as shown in Fig. 7A). In other words, the beam L can be concentratedly passed through the circular opening 322 and is less susceptible to the shadow of the photorefractive material 324. And pass to a plane perpendicular to the smooth surface (Z Han) (xy plane)

201213726 n:7 Chuan, "35539tw £doc/I formed * spot p,. The light spot p, which has a light shape as shown in Fig. 7B, is an approximately axis-shaped axisymmetric light shape. This spot p, the degree distribution, is shown in the diagram on the right side in Fig. 7B. The illuminance distribution of this spot p on the x-axis is shown in the lower diagram of Fig. 7A. Tongtong implementation of the financial, can also be changed from the adjustable imaging system = 00 to the degree of the beam L, so that the light beam l in the plane of light deformation, t 320 formed on the plane s of the spot p area is larger than the circular opening 322 © product (four) 7C Shown). In other words, in the case where the spot p area is larger than the area of the f hole 322, the light beam L can pass through the circular opening 322 and the light refraction material 324 at the same time. At this time, 'because the light beam L is affected by the light refraction material 324, the light beam L is formed on the (x_y plane), and the light is no longer a circular axisymmetrical light shape', but is similar to the light fold 304. A non-axisymmetric shape of the shape (rectangular), as shown in Figure 7D. Here, the illuminance distribution of the spot P' on the y-axis is as shown in the right side of Fig. 7D. The illuminance distribution of the spot Ρ on the X-axis is as shown in the lower diagram of FIG. 7D. 0 The collocation between the light-deformable element 32 〇 and the adjustable imaging system 200 in still another embodiment of the present invention may also be The kidney shape of the light source module is arbitrarily switched between an axisymmetric light shape and a non-axisymmetric light shape. 3 ' [Second Embodiment] FIG. 8 is a schematic diagram of a light source module of the embodiment. Referring to FIG. 8, the light source module of the embodiment is similar to the light source module of the first embodiment, but the form of the modulated imaging system 200 and the adjustable imaging system of the first embodiment.

201213726 ^ 35539twf.doc/I is different. Therefore, only the adjustable imaging system 2 of the present embodiment will be described below, and other similarities with the first embodiment will not be described again. - The adjustable imaging system 200 of the present embodiment includes a liquid lens 22A. The liquid lens 220 of the present embodiment includes a first liquid 222 and a second liquid 224. wherein the first liquid 222 has a larger refractive index, the second liquid 224 has a smaller refractive index, and the two liquids are immiscible. In the present embodiment, the first liquid 222 is, for example, oil, and the second liquid 224 is, for example, an alcohol. However, the present invention is not limited thereto, and the first liquid 222 and the second liquid 224 may be other suitable liquids having different refractive indices. ^9A and Fig. 9B are schematic views of the liquid lens 22 of the present embodiment (looking in the positive z direction). Referring to FIG. 9 and FIG. 9B, the liquid lens 22G of the present embodiment may include a plurality of concentric electrodes 226. When the circle electrode 226 does not apply a voltage to the first liquid 222, the surface of the first liquid 222 in contact therewith The contact angle is small, so that the area where the first liquid can occupy the maximum radius of the circle electrode 226 (as shown in FIG. 9A) means that the radius of curvature of the surface of the first liquid 222 is large, in other words, The liquid lens 22G has a longer focal length. When the voltage of the first liquid 222 is applied to the first liquid 222, the contact angle of the first liquid 222 with its contact surface becomes larger, so that the first liquid 222 is retracted to the area surrounded by the circle electrode 226 having the smallest radius (eg, Fig. 9B) means that the radius of curvature of the surface of the first liquid 222 becomes smaller. In other words, the liquid lens 220 has a shorter length; As can be seen from the above, the magnitude of the voltage applied to the first liquid 222 can control the radius of curvature of the surface of the first liquid 222, thereby controlling the focal length of the liquid lens 220. 201213726 ~

-------05539 twf.doc / I In this embodiment, by controlling the focal length of the liquid lens 220, the adjustable imaging system 200 of the present embodiment can also have the ability to change the convergence degree of the light beam l, and achieve The adjustable imaging system of the first embodiment has the same function. For example, when changing the voltage applied to the circled electrode 226 such that the focal length of the tunable imaging system 200 (eg, a combination of two liquid lenses 220) becomes smaller, the beam L converges 'and thus can be in the plane of the light transforming element 300 A small area of light is formed on S. When the voltage applied to the circle electrode 226 is changed such that the focal length of the imageable imaging system 2 (for example, the combination of the two liquid lenses 220) becomes large, the light beam L is relatively divergent, and thus can be in the plane in which the light-shaped conversion element 300 is located. A large area of the light spot is formed on s. [Third Embodiment] FIG. 1 is a schematic view of a light source module of the present embodiment. Referring to FIG. 00, the light source module of this embodiment is similar to the light source module of the first embodiment, except that the form of the adjustable imaging system 200 is different from that of the adjustable imaging system of the first embodiment. Therefore, only the adjustable imaging system 200 of the present embodiment will be described below, and other details that are the same as those of the first embodiment will not be described again. The adjustable imaging system 200 of the present embodiment can include a liquid crystal lens 230. The liquid crystal lens 230 of the present embodiment includes a liquid crystal layer 232. Since the liquid crystal molecules in the liquid crystal layer 232 have birefringence, by changing the direction of rotation by applying a voltage to the liquid crystal molecules, the refractive index of the liquid crystal layer 232 in a specific direction can be changed, thereby changing the liquid crystal lens 23〇. The focal length. In the present embodiment, 'the control of the focal length of the liquid crystal lens 23 can make the adjustable imaging system 2 of the embodiment of the present invention also have the ability to change the beam [convergence degree f, and reach the first The adjustable imaging system of the embodiment has the same function. For example, when the electric light applied to the liquid crystal layer is changed so that the focal length of the liquid crystal lens 230 becomes small, the light beam L converges, so that the plane of the light element f can be changed. Formed on S - a small area of light is applied to the electric house of the liquid crystal layer 232 so that the 'beam B' of the liquid crystal lens 230 is relatively divergent, so that a large area of the spot can be formed on the plane S where the light-shaped conversion element 300 φ is located. . In summary, in the light source module of the embodiment of the present invention, the light source mode = t can be arbitrarily switched between the axisymmetric light shape and the non-axisymmetric light shape by the combination of light === image system. . The difference in the overall luminous flux between the light-weighted and the non-extracted symmetrical light shapes can be used. Although the present invention has been disclosed above by way of example, it is not a simple one. Description: FIG. 1AHB, FIG. 8 and FIG. 1 are schematic diagrams of a light source module according to the present invention. FIG. 2A to FIG. 2D, FIG. 4A to FIG. 4D, and FIG. 6 of the target embodiment only show the light-shaped conversion element of the embodiment of the present invention, and FIG. 3C, FIG. 5A, FIG. 5C, and FIG. 7C means

201213726^5539tw£doc/I The relative relationship between the spot and the light transforming element of one embodiment of the present invention. 3B, 3D, 5B, 5D, 7B and 7D are schematic diagrams showing the light spot shape and the illuminance distribution thereof according to an embodiment of the present invention. 9A and 9B are schematic top views of a liquid lens according to an embodiment of the present invention. [Main component symbol description] 1000: Light source module 100: Light-emitting element 200: Adjustable imaging system 202: Optical element 220: Liquid lens 222: First liquid 224: Second liquid 226: Circle electrode 230. Liquid crystal lens 300, 310, 320: light-shaped conversion elements 302, 312, 322: openings 304, 314, 324: light-refracting material L: light beam D: distance P, P,: spot S, S2, S4: plane 16 201213726

tLyyu/8 35539tw£doc/I S!: ellipsoid s3: spherical s5, s6: section CL: ridgeline T: vertex h, n2: refractive index x, y, z: direction

Claims (1)

^SSS^twf.doc/I 201213726 VII. Patent application: A light source module comprising: a light-emitting element adapted to emit a light beam; an adjustable imaging system disposed on the transmission path of the light beam, and Suitable for changing the degree of convergence and divergence of the light beam; and a light-shaped conversion element disposed on the transmission path of the light beam from the adjustable imaging system, and including an opening and a light-refractive material surrounding the opening The shape of the aperture is different from the shape of the photorefractive material, the tunable imaging system being adapted to change the degree of convergence of the beam to cause the beam to pass through the aperture, or to simultaneously pass the beam through the photorefractive material With the opening. 2. The light source module of claim 1, wherein the light-refracting material is a convex lens having an ellipsoid, and the opening is a circular opening. The light source module of claim 1, wherein the light-refracting material is a convex lens, and the opening is a polygonal opening. 4. If the application is as described in item 3 of the full-time enclosure, wherein the polygonal opening is a square opening or a rectangular opening. The light source module of the invention, wherein the convex lens is a convex lens having a spherical surface. 6. For example, the patent application (4) 1 item Lin Zhiguang Lai JL, where the line 'the ridge lines respectively from the polygon: more 201213726 ------8 35539twf.doc/I end, and the light refraction material The shape of the cross section of the second end is substantially the same as the shape of the opening. 7. The light source module of claim 6, wherein the opening is a circular opening. 8. ° 8. The light source module of claim 6, wherein the polygon is rectangular. And the number of the ridge lines is 4. 9. The light source module of claim 1, wherein the shape of the cross section of the optical axis of the light beam perpendicular to the optical axis of the light beam is not perpendicular to the optical axis of the light beam. 10. The light source module of claim i, wherein the adjustable imaging system comprises a zoom lens, the zoom lens comprises at least one zoom lens and the adjustable imaging system changes the zoom lens The position of the zoom lens is as follows: 11. The light source module of claim 1, wherein the adjustable imaging system comprises a liquid lens. 12 as described in claim 1 The light source module, wherein the illuminating element comprises a liquid crystal lens. The light source module of claim 1, wherein the light emitting element comprises at least one light emitting diode. 19