Light source module

Light source module

The present invention relates to a light source module, and in particular to a light source module having a wide range of light extraction angles.

With the advancement of modern semiconductor technology, light emitting diodes (LEDs) have been widely used to provide light sources for electronic devices such as traffic signs, large billboards, scanners, and liquid crystal displays. Because the light-emitting diode has a fast response speed (about 10^-9Second), small size, low power consumption, low pollution (no mercury), high reliability, suitable for mass production, etc., so there is a tendency to replace traditional fluorescent lamps and incandescent bulbs with light-emitting diodes.

1 is a schematic cross-sectional view of a conventional light emitting diode light source module. Referring to FIG. 1 , a conventional light-emitting diode light source module 100 includes a light box 110 , a circuit board 120 , a plurality of LED packages 130 , and a transparent plate (transparent plate). ) 140. The light box 110 has a pair of bottom portions 112 and a light exiting section 114. The circuit board 120 is disposed on the bottom portion 112 of the light box, and the LED package 130 is disposed on the circuit board 120. The light-transmitting plate 140 is disposed on the light-emitting section 114 of the light box 110. Each of the light emitting diode packages 130 is adapted to emit a light beam L, and the light beam L penetrates the light transmitting plate 140.

Since the directivity of the light beam L emitted by the light emitting diode package 130 is high, most of the light in the light beam L is approximately perpendicular to the light exiting section 114, so that the light exiting angle range of the light beam L is too narrow, and the light emitting diode light source is made The uniformity of the light source provided by the module 100 is poor. In this way, when the conventional light-emitting diode light source module 100 is used for general illumination purposes, it is easy to feel that the light source is concentrated on some bright spots (which are located at the position of the LED package 130), and these bright spots are The brightness is much higher than the surrounding area, which is easy to cause glare and make the eyes feel uncomfortable. In addition, the range of the light exiting angle of the light beam L is too narrow for general lighting purposes. In order to improve the above problems, some conventional techniques perform a full atomization treatment on the light-transmitting plate 140 to prevent glare. However, the full atomization process causes the light beam L to lose too much light intensity after passing through the light transmitting plate 140.

2 is a schematic cross-sectional view of another conventional light emitting diode light source module. Referring to FIG. 2 , the conventional light-emitting diode light source module 200 includes a light box 210 , a circuit board 220 , a plurality of light-emitting diode packages 230 , a light-transmitting plate 240 , and a plurality of lenses 250 . In order to improve the glare, the unevenness of the light source, and the narrow range of the light exiting angle, a light-emitting diode package 230 is disposed on each of the light-emitting diode packages 230 to enable the light-emitting diode package. The beam L emitted by 230 diverges. However, the volume of the lens 250 is relatively large compared to the volume of the LED package 230. If a lens 250 is placed on each of the LED packages 230, the LEDs are pulled apart. The spacing D between the body packages 230. As a result, the LED package 230 cannot be closely arranged on the circuit board 220, which causes the density of the LED package 230 to be distributed on the circuit board 220 to be reduced, so that the LED body module is lighted. The number of the light-emitting diode packages 230 that can be accommodated in the 200 is limited, and the brightness of the light-emitting diode light source module 200 is difficult to increase.

In addition, since the volume of the lens 250 is large, the optical path length that the light beam L has to pass through the lens 250 is long, and the proportion of the light beam L absorbed by the lens 250 is increased, resulting in a light-emitting diode light source module. The brightness of 220 is lowered. Moreover, the large volume of the lens 250 also makes the overall volume of the light-emitting diode light source module 200 larger, and the length of the joint between the light-transmitting plate 240 and the light box 210 is elongated, so that the light-emitting diode light source The module 200 must be extra careful during assembly to avoid gaps in the joint between the light transmissive plate 240 and the light box 210, resulting in failure to waterproof. In addition, the bulky lens 250 also has a certain weight, which easily causes the weight of the light-emitting diode light source module 200 to be too heavy. In addition, since the number of the lenses 250 is as many as the number of the LED packages 230, the cost of the lens 250 is large, and the cost of the light-emitting diode light source module 200 is increased.

FIG. 3 is a schematic cross-sectional view of another conventional light emitting diode light source module. The light emitting diode light source module 300 includes a heat sink 310 and a plurality of light emitting diode packages 320. The heat sink 310 has a curved surface 312, and the light emitting diode package 320 is distributed on the curved surface 312 to make the light emitting diode light source module 300 have a larger light exit angle range. However, the curved surface 312 of the heat sink 310 is difficult to fabricate, and the assembly of the light emitting diode light source module 300 is difficult, which leads to an increase in the cost of the light emitting diode light source module 300.

Other related prior art patents include the Republic of China Nos. M310984, M312018, M301980, M290548, M290207, M289723, M286464, M286462, M272236, M271128, M266548, M260876, M258229, M254552, M246528, and I263355.

The present invention provides a light source module that has a large range of light exit angles, a small volume, a low cost, and can prevent glare.

The present invention proposes a light source module comprising a carrying unit, a plurality of light emitting elements, a light transmissive plate and a plurality of refractive protrusions. The light emitting elements are disposed on the carrying unit, and each of the light emitting elements is adapted to emit a light beam. The light-transmitting plate is disposed above the light-emitting elements and has a light-incident surface and a light-emitting surface. These refractive bumps are disposed on the light incident surface. Each of the refractive protrusions respectively corresponds to at least one of the light-emitting elements and is located on an optical axis of the light beam emitted by the light-emitting element.

In one embodiment of the present invention, each of the refractive bumps may correspond to one of the light-emitting elements, respectively.

In an embodiment of the present invention, a first vertical section of each of the refractive projections may be a triangle having a vertex angle toward the corresponding light-emitting element and a bottom of the triangle falling on the light-incident surface.

In an embodiment of the present invention, each of the refractive bumps may have a conical shape.

In an embodiment of the present invention, each of the refractive bumps may have a pyramid shape.

In an embodiment of the present invention, each of the refractive bumps may have a triangular prism shape.

In an embodiment of the present invention, a second vertical section of each of the refractive projections may be a rectangle. This second vertical section passes through the apex angle of the triangle and is substantially perpendicular to the first vertical section described above.

In an embodiment of the present invention, a second vertical section of each of the refractive projections may be a trapezoid. This second vertical section passes through the apex angle of the triangle and is substantially perpendicular to the first vertical section described above. Wherein, the longer bottom of each trapezoid can fall on the light incident surface of the light transmissive plate.

In an embodiment of the present invention, each of the refractive protrusions may have at least one refractive surface located below the light incident surface, and the refractive surface may be a curved surface convex toward the corresponding light emitting element.

In an embodiment of the present invention, the refractive surface of each of the refractive projections is, for example, a hemispherical surface.

In one embodiment of the present invention, each of the refractive bumps may be semi-cylindrical.

In one embodiment of the present invention, each of the refractive bumps is, for example, in the form of a polyhedron.

In one embodiment of the present invention, each of the refractive bumps may correspond to a plurality of the light-emitting elements, respectively.

In an embodiment of the present invention, each of the refractive protrusions may be columnar, and the light emitting elements corresponding to the refractive protrusions are arranged along the extending direction of the refractive protrusions.

In an embodiment of the present invention, each of the refractive protrusions may have a triangular column shape, and a first vertical section of each of the refractive protrusions may be a triangle. The apex angle of this triangle faces the corresponding illuminating element, while the bottom of the triangle falls on the illuminating surface.

In an embodiment of the present invention, each of the triangles may have a base to height ratio of 2 to 3. In addition, the intersection of the two waist and the bottom of each triangle may each have a rounded corner, and the center of curvature of each rounded corner falls outside the refractive protrusion and the light-transmitting plate. In addition, the apex angle of each triangle may be a rounded corner.

In one embodiment of the present invention, the refractive projections may be integrally formed with the light transmissive plate.

In an embodiment of the present invention, each of the refractive protrusions has at least one refractive surface located below the light incident surface, and the refractive surface is a matte surface.

In one embodiment of the present invention, the light transmissive plate can be a flat plate.

In an embodiment of the present invention, the light transmissive plate may be a curved plate.

The present invention further provides a light source module comprising a carrying unit, a plurality of light emitting elements and a light transmissive plate. The light emitting elements are disposed on the carrier unit, and each of the light emitting elements is adapted to emit a light beam. The light-transmitting plate is disposed above the light-emitting elements and has a light-incident surface and a light-emitting surface. The light entrance surface has a plurality of matte areas. Each of the matte regions respectively corresponds to at least one of the light-emitting elements and is located on an optical axis of the light beam emitted by the light-emitting element to scatter the light beam.

In an embodiment of the present invention, each of the matte regions may be strip-shaped, and the light-emitting elements corresponding to the matte regions are arranged along the extending direction of the matte region.

The present invention further provides a light source module including a carrying unit, a plurality of light emitting elements, and a light transmitting plate. The light emitting elements are disposed on the carrier unit, and each of the light emitting elements is adapted to emit a light beam. The light-transmitting plate is disposed above the light-emitting elements and has a light-incident surface and a light-emitting surface. The light incident surface has a plurality of depressions. Each recess corresponds to at least one of the light-emitting elements and is located on the optical axis of the light beam emitted by the light-emitting element to diverge the light beam.

In an embodiment of the present invention, each of the depressions may be in the form of a strip, and the light-emitting elements corresponding to the recesses are arranged along the extending direction of the recess.

The following embodiments are applicable to the above three light source modules.

In an embodiment of the present invention, each of the light emitting elements may be a light emitting diode package. In addition, each of the light emitting diode packages may include a light emitting diode chip and a light transmitting package. The light emitting diode chip is electrically connected to the carrying unit, and the light transmitting package is disposed on a light emitting surface of the light emitting diode chip.

In an embodiment of the present invention, the carrier unit is, for example, a circuit board.

In an embodiment of the present invention, the carrying unit is, for example, a heat conducting plate or a thermally conductive housing.

In an embodiment of the present invention, the light source module may further include a light box having a light exiting section and a bottom. Wherein, the carrying unit is disposed on the bottom of the light box, and the light transmitting plate is disposed on the light exiting section.

In the light source module of the present invention, since a light-emitting bump above each of the light-emitting elements reflects a part of the light beam emitted from the light-emitting element to the light-incident surface of the light-transmitting plate, the light source module of the present invention has a larger light-emitting angle range. . In addition, in the light source module of the present invention, since the light incident surface of the light transmissive plate has a plurality of matte areas, and a matte area above each of the light emitting elements causes the light beams emitted by the light emitting elements to scatter, the light source of the present invention The module can improve glare. On the other hand, in the light source module of the present invention, since the light incident surface of the light transmissive plate has a plurality of recesses, and a recess above each of the light emitting elements causes the light beam emitted by the light emitting element to diverge, the light source module of the present invention The range of light exit angles is large.

The above and other objects, features and advantages of the present invention will become more apparent and understood.

4A is a cross-sectional view of a light source module according to an embodiment of the present invention, FIG. 4B is a perspective view of the light-transmitting plate and the light-reducing bump of FIG. 4A, and FIG. 4C is a cross-sectional view of the light-transmitting plate of FIG. 4B along a section line AA. . Referring to FIG. 4A to FIG. 4C , the light source module 400 of the embodiment includes a carrying unit 410 , a plurality of light emitting elements 420 , a light transmitting plate 430 , and a plurality of refractive protrusions 440 . The light emitting elements 420 are disposed on the carrying unit 410, and each of the light emitting elements 420 is adapted to emit a light beam L. The light-transmitting plate 430 is disposed above the light-emitting elements 420 and has a light-incident surface 432 and a light-emitting surface 434. The refractive protrusions 440 are disposed on the light incident surface 432 . Each of the refractive protrusions 440 corresponds to at least one of the light-emitting elements 420 and is located on the optical axis of the light beam L emitted by the light-emitting element 420. In addition, each of the refractive protrusions 440 can have at least one refractive surface 442 that is located below the light incident surface 432. The light-receiving surface 442 is adapted to reflect the partial light beam L1 emitted by the corresponding light-emitting element 420 to the light-incident surface 432 to enter the light-transmitting plate 430, and is adapted to pass another partial light beam L2 emitted by the light-emitting element 420 to the transparent light source 420. Light board 430.

In this embodiment, the carrying unit 410 is, for example, a circuit board. Each of the light-emitting elements 420 is, for example, a light-emitting diode package including a light-emitting diode chip 422 and a light-transmitting package 424. The light emitting diode 422 is electrically connected to the carrying unit 410, and the transparent package 424 is disposed on a light emitting surface 422a of the LED 422. In addition, the light source module 400 can further include a light box 450 having a light exit section 452 and a bottom 454. The carrying unit 410 is disposed on the bottom 454 of the light box, and the transparent plate 430 is disposed on the light exiting section 452. It should be noted that the present invention does not limit the carrying unit 410 as a circuit board. In other embodiments, the carrier unit 410 can also be a thermally conductive plate, a thermally conductive housing, a conductive plate, a conductive housing, a light box, or other suitable carrier.

In this embodiment, each of the refractive protrusions 440 may correspond to one of the light-emitting elements 420, respectively. Further, each of the refractive bumps 440 is, for example, in the shape of a triangular prism. The first vertical cross section of the refractive protrusion 440 along the section line BB is a triangle 444 (as shown in FIG. 4A). The apex angle θ1 of the triangle 444 faces the corresponding illuminating element 420, while the bottom 444a of the triangle 444 falls on the illuminating surface 432. In addition, a second vertical section of the refractive protrusion 440 along the section line AA is a rectangle 444'. The second vertical section passes through the apex angle θ1 of the triangle 444 and is substantially perpendicular to the first vertical section.

5A to 5H are simulations of light intensity distribution in the direction parallel to the section line BB in FIG. 4B at 5230 mm above the light-transmitting plate of the light source module of FIG. 4A. Please refer to FIG. 4A and FIG. 5A to FIG. 5H. FIG. 5A illustrates a light intensity distribution when the thickness T=2 mm of the light-transmitting plate 430, the length W=1 mm of the bottom 444a of the triangle 444, and the height H=1 of the triangle 444, wherein the abscissa is zero. The position directly above the center of the light plate 430. As can be seen from FIG. 5A, the light intensity at the zero coordinate of the abscissa is not the strongest as in the prior art, but the light intensity near the horizontal coordinate of ±2000 mm is the strongest, which is 59.1×10.^-6The lux is used to verify that the light beam L emitted by the light source module 400 of the present embodiment is no longer concentrated directly above the light source module 400, but is scattered on both sides. 5B shows the light intensity distribution when T=2, W=1, and H=2; FIG. 5C shows T=2, W=1, and H=3; FIG. 5D shows T=2, W=1, H. When FIG. 5E is T=2, W=2, and H=1; FIG. 5F is T=2, W=2, and H=2; FIG. 5G is T=2, W=2, and H=3. Fig. 5H is when T=2, W=2, and H=4.

In this embodiment, the length ratio of the bottom 444a of each triangle 444 to the height H may be 2 to 3. For example, the length W of the bottom 444a is, for example, 2 mm, and the height H is, for example, 3 mm (as shown in FIG. 5G), and the maximum light intensity measured at this time is the lowest in FIG. 5A to FIG. 5H, which is 50.4. Lux, it can be verified that the light intensity distribution at this time is less concentrated. In other words, the light beam L emitted by the light source module 400 is relatively dispersed at this time.

In the light source module 400 of the present embodiment, a light-emitting bump 440 is disposed on each of the light-emitting elements 420 to reflect a portion of the light beam L1 emitted by the light-emitting element 420 to the light-incident surface 432 of the light-transmitting plate 430, and the light beam L1 is re-penetrated. The light-transmitting plate 430 is transparent, so that the light-emitting module 400 of the embodiment has a large range of light-emitting angles, and the light beam L is dispersed and is not limited to being directly above the refractive protrusions 440. Thus, when the light source module 400 is used as a street light with the light-emitting surface 434 of the light-transmitting plate 430 facing the road surface, it is possible to provide illumination with a relatively wide range and relatively uniform brightness. In addition, the light source module 400 of the embodiment does not need to have a relatively large lens on each of the light-emitting elements as in the prior art, so that the pitch Dof the light-emitting elements 420 can be small, that is, the design of the pitch D. More flexible. In this way, the volume of the light source module 400 of the embodiment can be effectively reduced, and the length of the joint between the light-transmitting plate 430 and the light box 450 is shortened, thereby making the waterproof design of the light source module 400 easier. And the yield is high. Moreover, the light source module 400 of the embodiment can save the cost and weight of the relatively large lens, and thus the light source module 400 has lower cost and lighter weight. In addition, since the light beam L is not concentrated directly above the light emitting element 420, the light source module 400 of the present embodiment can also improve glare.

In this embodiment, the refractive surface 442 of each of the refractive protrusions 440 may be a matte surface to scatter the light beam L to further improve glare. In addition, the refractive protrusion 440 and the light transmissive plate 430 may be integrally formed to reduce the manufacturing cost of the refractive protrusion 440.

It is worth noting that this creation does not limit the shape of the refractive bumps. In other embodiments of the present invention, the refractive bumps may also be of other suitable shapes. For example, in another embodiment, referring to FIG. 6A and FIG. 6B, each of the refractive protrusions 440a is also triangular prism-shaped, and the vertical section of the refractive protrusion 440a along the section line BB is also a triangle 444b. However, the intersection of the two waists 444c and the bottom 444d of the triangle 444b each has a rounded corner 444e, and the center of curvature of each of the rounded corners 444e falls outside the refractive protrusion 440a and the light-transmitting plate 430. It is worth noting that the arcs that make up the rounded corners mentioned in this creation are not limited to arcs of perfect circle, but may also be arcs of curves of ellipse, parabola, hyperbola or other shapes. The rounded corners 444e can make the beam pass through the intersection of the waist 444c and the bottom 444d, and the light intensity distribution of the light source module when the smoothing convexity 440a is used and the smoothing coefficient K=0.707 of the rounded corner 444e is as follows. Figure 7 is shown. Further, the light intensity distribution at 5230 mm above the light-transmitting plate 430 when T = 2 mm, W = 2 mm, and H = 2 mm is shown in FIG.

In another embodiment, referring to FIG. 8A and FIG. 8B, the vertical section of each of the refractive protrusions 440b along the section line BB is also a triangle 444f, but the apex angle 444g of the triangle 444f is rounded. In still another embodiment, referring to FIG. 9A and FIG. 9B, the vertical section of each of the refractive protrusions 440c along the section line AA is a trapezoid 444", and the longer bottom 444h of the trapezoidal 444" may fall on the light-transmitting board 430. On the light surface 432.

In another embodiment, referring to FIG. 10, each of the refractive protrusions 440d may also have a conical shape, and the vertical cross section thereof may be a triangle 444, 444b or 444f as illustrated in FIG. 4A, FIG. 6B or FIG. In another embodiment, referring to FIG. 11, each of the refractive protrusions 440e may also have a pyramid shape, and the vertical cross section thereof may be a triangle 444, 444b or 444f as illustrated in FIG. 4A, FIG. 6B or FIG. In still another embodiment, referring to FIG. 12, each of the refractive bumps 440f may also have a polyhedral shape.

In the light source module 400g of another embodiment, referring to FIG. 13A and FIG. 13B, the refractive surface 442g of each of the refractive protrusions 440g may be a curved surface that is convex toward the corresponding light-emitting element 420. In this embodiment, each of the refractive projections 440g has a semi-cylindrical shape. In another embodiment, referring to FIG. 14, the refractive surface 442h of each of the refractive protrusions 440h may be a hemispherical surface, and the refractive protrusions 440h may be hemispherical.

FIG. 15 is a perspective view of a light source module according to still another embodiment of the present invention, in which a light box is not shown. Referring to FIG. 15, the light source module 400i of the present embodiment is similar to the light source module 400 (refer to FIG. 4A). The difference between the two is that in the light source module 400i, each of the refractive protrusions 440i and the light is respectively illuminated. Several of the elements 420 correspond. In addition, each of the refractive protrusions 440i has a columnar shape, and the light-emitting elements 420 corresponding to the refractive protrusions 440i are arranged along the extending direction of the refractive protrusions 440i. In this embodiment, each of the refractive protrusions 440i may have a triangular prism shape, and a vertical cross section of each of the refractive protrusions 440i along the surface line BB may be a triangle 444 as shown in FIG. 4A, FIG. 6B or FIG. 8B. , 444b or 444f. In the present embodiment, the light-transmitting plate 430 is, for example, a flat plate, but the present invention is not limited thereto. In another embodiment of the present invention, referring to FIG. 16, the light transmissive plate 430j may also be a curved plate.

Further, the present invention does not limit the shape of the refractive bumps corresponding to the plurality of light-emitting elements 420. In still another embodiment, referring to FIG. 17, the refractive surface 442k of the refractive protrusion 440k may be a curved surface that is convex toward the corresponding light-emitting elements. In the present embodiment, the refractive projections 440k are, for example, semi-cylindrical.

18A is a partial plan view of a light source module according to another embodiment of the present invention, and FIG. 18B is a perspective view of the light-transmitting plate of FIG. 18A. Referring to FIG. 18A and FIG. 18B, the light source module 4001 of the present embodiment is similar to the light source module 400i (refer to FIG. 15). The difference between the two is that the light source module 4001 does not have a refractive bump, instead That is, the light incident surface 4321 of the light transmissive plate 4301 has a plurality of matte regions 4361. Each of the matte regions 4361 respectively corresponds to at least one of the light-emitting elements 420 and is located on the optical axis of the light beam L emitted by the light-emitting element 420 to scatter the light beam L.

In the present embodiment, each of the matte regions 4361 may be strip-shaped and correspond to a plurality of light-emitting elements 420, and the light-emitting elements 420 corresponding to the matte regions 4361 may be arranged along the extending direction of the matte regions 4361.

In the light source module 4001 of the present embodiment, since the light incident surface 4321 of the light transmissive plate 4301 has a plurality of matte regions 4361, and a matte region 4361 above each of the light emitting elements 420 causes the light beam L emitted by the light emitting element 420. The light source module 4001 of the present embodiment can improve glare. It should be noted that the present creation does not limit each matte area 4361 to correspond to the plurality of light-emitting elements 420. In another embodiment, referring to FIG. 19, each of the matte regions 436m of the light-transmitting plate 430m respectively correspond to one light-emitting element. In addition, the present invention does not limit the shape of the matte area, and the matte area may be strip-shaped (as shown in FIG. 18B), dot-like (as shown in FIG. 19), or other suitable shape.

20A is a partial plan view of a light source module according to another embodiment of the present invention, and FIG. 20B is a perspective view of the light-transmitting plate of FIG. 20A. Referring to FIG. 20A and FIG. 20B, the light source module 400n of the present embodiment is similar to the light source module 4001 (refer to FIG. 18A), and the difference between the two is that the light-emitting surface of the light-transmitting plate 430n of the light source module 400n is 432n has a plurality of recesses 436n. Each of the recesses 436n corresponds to at least one of the light-emitting elements 420 and is located on the optical axis of the light beam L emitted by the light-emitting element 420 to diverge the light beam L.

In the present embodiment, each of the recesses 436n may be strip-shaped, and the light-emitting elements 420 corresponding to the recesses 436n may be arranged along the extending direction of the recesses 436n. In the present embodiment, each recess 436n may correspond to a plurality of light-emitting elements 420, however, the present creation is not limited thereto. In other embodiments, each recess may also correspond to one of the light emitting elements 420, respectively.

In the light source module 400n of the present embodiment, since the light incident surface 432n of the light transmissive plate 430n has a plurality of recesses 436n, and a recess 436n is disposed above each of the light emitting elements 420, the light beam L emitted by the light emitting element 42O is diverged. The light source module 400n of the embodiment has a large range of light exit angles.

In summary, in the light source module of the present invention, since a light-emitting bump above each of the light-emitting elements reflects a part of the light beam emitted from the light-emitting element to the light-incident surface of the light-transmitting plate, the light source module of the present invention The range of light output angle is large, and can provide illumination with relatively uniform brightness. In addition, the light source module of the present invention does not need to have a relatively large lens on each of the light-emitting elements as in the prior art, so that the pitch of the light-emitting elements can be small, that is, the design flexibility of the pitch is large. In this way, the volume of the light source module of the present invention can be effectively reduced. Furthermore, the light source module of the present invention can eliminate the cost and weight of the relatively large lens, so the light source module of the present invention is low in cost and light in weight.

In addition, in the light source module of the present invention, since the light incident surface of the light transmissive plate has a plurality of matte areas, and a matte area above each of the light emitting elements causes the light beams emitted by the light emitting elements to scatter, the light source of the present invention The module can improve glare. On the other hand, in the light source module of the present invention, since the light incident surface of the light transmissive plate has a plurality of recesses, and a recess above each of the light emitting elements causes the light beam emitted by the light emitting element to diverge, the light source module of the present invention The range of light exit angles is large.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

<p>100, 200, 300. . . Light-emitting diode light source module</p><p>110, 210, 450. . . Light box</p><p>112, 454. . . bottom</p><p>114, 452. . . Light section</p><p>120, 220. . . Circuit board</p><p>130, 230, 320. . . Light-emitting diode package</p><p>140, 240, 430, 430j, 430l, 430m, 430n. . . Idol</p><p>250. . . lens</p><p>310. . . Heat sink</p><p>312. . . Surface</p><p>400, 400g, 400i, 400l, 400n. . . Light source module</p><p>410. . . Bearer unit</p><p>420. . . Light-emitting element</p><p>422. . . Light-emitting diode chip</p><p>422a, 434. . . Glossy surface</p><p>424. . . Light transparent package</p><p>432, 432l, 432n. . . Glossy surface</p><p>436l, 436m. . . Matte area</p><p>436n. . . Depression</p><p>440, 440a, 440b, 440c, 440d, 440e, 440f, 440g, 440h, 440i, 440k. . . Refractive bump</p><p>442, 442g, 442h, 442k. . . Fractal surface</p><p>444, 444b, 444f. . . triangle</p><p>444'. . . rectangle</p><p>444"...trapezoid</p><p>444a, 444d, 444h. . . bottom</p><p>444c. . . waist</p><p>444e. . . Fillet</p><p>444g, θ1. . . Top angle</p><p>D, D'. . . spacing</p><p>H. . . high</p><p>K. . . Smoothing coefficient</p><p>L, L1, L2. . . beam</p><p>T. . . thickness</p><p>W. . . length</p>

1 is a schematic cross-sectional view of a conventional light emitting diode light source module.

2 is a schematic cross-sectional view of another conventional light emitting diode light source module.

FIG. 3 is a schematic cross-sectional view of another conventional light emitting diode light source module.

4A is a cross-sectional view of a light source module according to an embodiment of the present invention.

4B is a perspective view of the light transmissive plate and the refractive protrusions of FIG. 4A.

4C is a schematic cross-sectional view of the light-transmitting plate of FIG. 4B along a section line AA.

5A to 5H are simulations of light intensity distribution in the direction parallel to the section line BB in FIG. 4B at 5230 mm above the light-transmitting plate of the light source module of FIG. 4A.

6A, 6B, 8A, 8B, 9A, 9B, 10, 11, 12, 13A, 14, 16 and 17 illustrate the light-transmitting plate and the refractive convex in FIG. 4A Other changes to the block.

FIG. 7 illustrates a light intensity distribution of a light source module employing the refracting bumps of FIG. 6A.

FIG. 13B is a cross-sectional view of a light source module according to another embodiment of the present invention.

FIG. 15 is a perspective view of a light source module according to still another embodiment of the present invention.

FIG. 18A is a partial schematic view of a light source module according to another embodiment of the present invention.

Figure 18B is a perspective view of the light-transmitting plate of Figure 18A.

Figure 19 illustrates other variations of the light transmissive plate of Figure 18A.

20A is a partial schematic view of a light source module according to another embodiment of the present invention.

Figure 20B is a perspective view of the light transmissive plate of Figure 20A.