TWM447511U - Light source module - Google Patents

Abstract

A light source module including a light guide plate, at least one light emitting device, a frame and a hybrid structure is provided. The light guide plate has a light incident surface and a light emitting surface. The light emitting device is disposed beside the light incident surface. The frame covers the light emitting device, the light incident surface and a part of the light emitting surface. The hybrid structure includes a reflective layer and a first buffer layer. The reflective layer is disposed between the light emitting surface and the frame, and covers a part of the light emitting surface. A part of the reflective layer extends from the light emitting surface to the light emitting device and beyond the light incident surface. The first buffer layer is disposed between the light emitting device and the reflective layer, and covers a part of the light emitting surface. The first buffer layer has a first side surface facing to the light emitting device. The first side surface and the light incident surface are substantially coplanar.

Description

Light source module

The present invention relates to a light source module, and in particular to a light source module having a composite structure.

In the conventional light source module, in order to avoid the light leakage problem and improve the coupling efficiency between the light emitting element and the light guide plate, a reflective material and a buffer material are disposed between the light guide plate and the plastic frame of the light source module. In the prior art, the reflective material and the buffer material are disposed side by side on the light-emitting surface of the light guide plate and are in contact with the light-emitting surface of the light guide plate. When the width of the plastic frame of the light source module needs to be narrowed, the width of the reflective material and the buffer material should be reduced simultaneously with the width of the plastic frame. When the width of the reflective material and the cushioning material is too narrow, for example, less than 1.5 cm, it is a difficult task to manually attach the reflective material and the cushioning material to the plastic frame, thereby making the manufacturing yield of the light source module. Not easy to upgrade.

The Republic of China patent TWM296382 discloses that a light-shielding element is disposed between the light guide plate and the plastic frame to reduce light entering and detecting dark lines. The Republic of China patent TW581849 discloses that a reflective sheet is disposed between the light guide plate and the liquid crystal panel. The reflective sheet is attached to the light guide plate by a strip. U.S. Patent No. 6,742,906 discloses that the two ends of the light guide plate in contact with the reflector are provided with two absorptive areas, and the reflecting sheets protrude from the absorption area.

In view of this, the present invention provides a backlight module which is easy to implement narrow The border has a high manufacturing yield.

The present invention proposes a light source module comprising a light guide plate, at least one light emitting element, a frame body and a composite structure. The light guide plate has a light incident surface and a light exit surface connected to the light incident surface. The illuminating element is located next to the light incident surface and is adapted to emit a light beam. The light beam enters the light guide plate from the light entrance surface and exits the light guide plate via the light exit surface. The frame covers the light-emitting element, the light-incident surface, and a part of the light-emitting surface. The composite structure includes a reflective layer and a first buffer layer. The reflective layer is located between the light-emitting surface and the frame and covers a part of the light-emitting surface. The reflective layer extends from the light exiting toward the light emitting element and protrudes from the light incident surface. The first buffer layer is located between the light-emitting surface and the reflective layer and covers a portion of the light-emitting surface. The first buffer layer has a first side facing the light emitting element. The first side is substantially coplanar with the light incident surface.

In an embodiment of the present invention, the composite structure further includes a first adhesive layer. The first adhesive layer connects the reflective layer and the first buffer layer.

In an embodiment of the present invention, the first adhesive layer has a second side facing the light emitting element. The second side and the first side are substantially coplanar with the light incident surface.

In an embodiment of the present invention, the composite structure further includes a second adhesive layer. The second adhesive layer connects the reflective layer and the frame.

In an embodiment of the present invention, the composite structure further includes a second buffer layer. The second buffer layer is located between the frame and the reflective layer.

In an embodiment of the present invention, the edge of the second buffer layer substantially coincides with the edge of the reflective layer.

In an embodiment of the present invention, the composite structure further includes a third adhesive layer. The third adhesive layer connects the second buffer layer and the reflective layer.

In an embodiment of the present invention, the thickness of the first buffer layer is smaller than the thickness of the second buffer layer.

In an embodiment of the present invention, the composite structure further includes a second adhesive layer. The second adhesive layer is located between the second buffer layer and the frame.

In an embodiment of the present invention, the thickness of the first buffer layer is less than the thickness of the reflective layer.

In an embodiment of the present invention, the first buffer layer is in contact with the light exit surface.

In an embodiment of the present invention, the light source module further includes a backboard. The backboard carries a light-emitting element, a composite structure, and a light guide plate. The frame body holds the light guide plate together with the back plate through the composite structure.

Based on the above, in the light source module of an embodiment of the present invention, the reflective layer and the first buffer layer are stacked one on another instead of being side by side as in the prior art. Therefore, when the frame width of the backlight module needs to be narrowed, the width of the reflective layer and the first buffer layer need not be excessively reduced. The reflective layer and the first buffer layer can still have a certain width, so that the manufacturer can easily fix the reflective layer and the first buffer layer on the frame, thereby improving the manufacturing yield of the light source module.

In addition, in the light source module of the embodiment of the present invention, the side of the first buffer layer of the composite structure may be substantially aligned with the light incident surface without shielding the portion of the reflective layer protruding from the light incident surface. The reflective layer of the portion can reflect the light beam emitted by the light-emitting element into the light guide plate, thereby increasing the light coupling efficiency of the light source module.

In addition, in the light source module of an embodiment of the present invention, the composite structure The thickness of the first buffer layer can be very thin, so that the height difference between the reflective surface of the reflective layer and the light guide plate is not excessive. In this way, when the light beam is reflected back into the light surface through the reflective surface, it is not easily absorbed by the first side surface of the first buffer layer, and thus the light coupling efficiency of the light source module is not easily affected.

In order to make the above features and advantages of the present invention more comprehensible, the following embodiments are described in detail with reference to the accompanying drawings.

The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is used to illustrate that it is not intended to limit the creation.

Light source module structure

1 is a partial cross-sectional view of a light source module according to an embodiment of the present invention. Referring to FIG. 1 , the light source module 100 of the embodiment includes a light guide plate 110 , at least one light emitting element 120 , a frame body 130 , and a composite structure 140 . In the present embodiment, the light emitting element 120 is, for example, a light emitting diode. However, the present invention is not limited thereto. In other embodiments, the light emitting element 120 may also be a Cold Cathode Fluorescent Lamps (CCFL) or other suitable light source.

The light guide plate 110 of the embodiment has a light incident surface 112 and a light exit surface 114 connected to the light incident surface 112. The light emitting element 120 is located beside the light incident surface 112 and Suitable for emitting light beams (not shown). The light beam enters the light guide plate 110 from the light incident surface 112 and exits the light guide plate 110 via the light exit surface 114. In this embodiment, the light incident surface 112 may be perpendicular to the light exit surface 114, and the light emitting surface 122 of the light emitting element 120 may be parallel to the light incident surface 112. In other words, the light source module 100 of the embodiment may be a side light source type light source module.

The frame body 130 of the embodiment covers the light-emitting element 120, the light-incident surface 112, and a part of the light-emitting surface 114. Furthermore, the frame 130 can completely cover the light emitting element 120 and the light incident surface 112. The light exiting surface 114 can be divided into a main area 114a and an edge area 114b surrounding the main area 114a, but the present invention is not limited thereto. The frame 130 may cover the edge region 114b and expose the main region 114a. In this embodiment, the frame 130 may be a plastic frame, but the present invention is not limited thereto.

2 is a partially enlarged schematic view of the composite structure, the frame body and the light guide plate of FIG. 1. The structure of the composite structure 140 of the present embodiment will be described in detail below with reference to FIGS. 1 and 2. Referring to FIG. 1 and FIG. 2 , the composite structure 140 of the embodiment is located between the frame 130 and the light guide plate 110 . The composite structure 140 of the present embodiment includes a reflective layer 142 and a first buffer layer 144. The reflective layer 142 is located between the light emitting surface 114 and the frame 130. The reflective layer 142 covers a portion of the light exit surface 114. The reflective layer 142 extends from the light exit surface 114 toward the light emitting element 120 and protrudes from the light incident surface 112. The first buffer layer 144 is located between the light emitting surface 114 and the reflective layer 142 and covers a portion of the light emitting surface 114. The first buffer layer 144 has a first side 144a that faces the light emitting element 120. The first side 144a is substantially coplanar with the light incident surface 112, but may allow for some tolerance. In other words, one side of the first buffer layer 144 can be aligned with the light incident surface 112, and The portion 142a of the reflective layer 142 that protrudes from the light incident surface 112 is not shielded, but an assembly tolerance of a certain degree, for example, about ±0.5 mm, may be tolerated. The partially reflective layer 142a protruding from the light incident surface 112 reflects the light beam emitted from the light emitting element 120 into the light guide plate 110, thereby increasing the light coupling efficiency of the light source module 100.

The first buffer layer 144 of this embodiment can be in contact with the light exit surface 114. The deformation of the first buffer layer 144 may cause a gap between the first buffer layer 144 and the light-emitting surface 114 to be less likely to occur, thereby reducing the probability of light leakage of the light source module 100. Further, the bottom surface 144b of the first buffer layer 144 may be a rough surface. The rough surface can scatter a large-angle beam (ie, a beam having a larger angle with the optical axis of the light-emitting element) into the light guide plate 110, thereby avoiding the problem that the light source module 100 is bright and halo. As shown in FIG. 2, in the embodiment, the thickness d1 of the first buffer layer 144 may be thin, so that the height difference between the reflective surface 142b of the reflective layer 142 and the light guide plate 110 is not excessive. In this way, when the light beam is reflected back into the light surface 112 through the reflective surface 142b, it is not easily absorbed by the first side surface 144a of the first buffer layer 144, and the light coupling efficiency of the light source module 100 is not easily affected. In this embodiment, the thickness d1 of the first buffer layer 144 may be smaller than the thickness d2 of the reflective layer 142, but the present invention is not limited thereto, that is, the thickness d1 of the first buffer layer 144 may be greater than or equal to the reflective layer. The thickness d2 of 142. In this embodiment, the material of the first buffer layer 144 includes a high density silicon pad or other suitable material.

It is worth mentioning that, in this embodiment, the reflective layer 142 and the first buffer layer 144 are stacked one on top of the other instead of being side by side as in the prior art. Therefore, when the frame 130 of the backlight module 100 has a width W (drawn in the figure) 1) When narrowing is required, the width of the reflective layer 142 and the first buffer layer 144 may not be excessively reduced. The reflective layer 142 and the first buffer layer 144 can still have a certain width, so that the manufacturer can easily fix the reflective layer 142 and the first buffer layer 144 on the frame 130, thereby improving the manufacturing yield of the light source module 100. .

Referring to FIG. 2, the composite structure 140 of the present embodiment may further include a first adhesive layer 146. The first adhesive layer 146 can connect the reflective layer 142 and the first buffer layer 144. The first adhesive layer 146 has a second side 146a that faces the light emitting element 120. The second side 146a and the first side 144a of the first buffer layer 144 are substantially coplanar with the light incident surface 112, but may be tolerated to a certain extent, such as an assembly tolerance of about ±0.5 mm. More specifically, the edge of the first adhesive layer 146 may coincide with the edge of the first buffer layer 144, but allows for a certain degree of assembly tolerance. In other words, the first adhesive layer 146 is also substantially not shielded from the portion 142a of the reflective layer 142 protruding from the light incident surface 112, thereby substantially affecting the light coupling efficiency of the light source module 100.

The composite structure 140 of the present embodiment may optionally include the second buffer layer 143, but the present invention is not limited thereto. In other embodiments, the composite structure may not include the second buffer layer 143. In the embodiment, the second buffer layer 143 may be located between the frame 130 and the reflective layer 142. In this embodiment, the edge of the second buffer layer 143 may substantially coincide with the edge of the reflective layer 142 to protect the reflective layer 142. The composite structure 140 of the present embodiment may further include a second adhesive layer 148. The second adhesive layer 148 can connect the second buffer layer 143 and the frame 130. In other words, the composite structure 140 of the present embodiment can be attached to the frame 130 by the second adhesive layer 148. In this embodiment, the edge of the second adhesive layer 148 may coincide with the edge of the second buffer layer 143 to make the second cushion The punching layer 143 can be stably fixed to the frame 130 and is less likely to be deformed.

The composite structure 140 of this embodiment further includes a third adhesive layer 145. The third adhesive layer 145 may connect the second buffer layer 143 and the reflective layer 142. In this embodiment, the edge of the third adhesive layer 145 may coincide with the edge of the reflective layer 142. The thickness d1 of the first buffer layer 144 may be smaller than the thickness d3 of the second buffer layer 143, but the present invention is not limited thereto. The purpose of designing the thickness d1 of the first buffer layer 144 to be thin relative to the thickness of the second buffer layer 143 is to make the light beam difficult to be affected by the first buffer layer 144 during the process of reflecting back into the light surface 112 through the reflective surface 142b. The absorption of the first side 144a affects the light coupling efficiency of the light source module 100.

The second buffer layer 143 of the embodiment can be used to fill the gap between the reflective layer 142 and the frame 130, so that the first buffer layer 144 can further resist the light guide plate 110, thereby preventing the light source module 100 from leaking. It should be noted that, in other embodiments, when the distance between the light-emitting surface 114 and the frame 130 is not large, the composite structure 140 may not include the second buffer layer 143 and the third adhesive layer 145, and the reflective layer 142 may only It is connected to the frame 130 through the second adhesive layer 148. In other words, the designer can determine whether the second buffer layer 143 and the third adhesive layer 145 are added to the composite structure 140 by the distance between the light surface 114 and the frame 130.

Referring to FIG. 1 , the light source module 100 of the embodiment further includes a back plate 150 . The backing plate 150 is an element for carrying thereon. The back plate 150 carries the light emitting element 120, the composite structure 140, and the light guide plate 110. The frame 130 can hold the light guide plate 110 together with the back plate 150 through the composite structure 140. The light source module 100 of the embodiment further includes a backplane 150 and the frame 130 and The heat sink 160 to which the light emitting element 120 is connected. The heat sink 160 can extend the heat emitted by the light emitting element 120 to the outside of the light source module 100, thereby extending the life of the light source module 100. The light source module 100 of the embodiment further includes a reflective sheet 170 between the back plate 150 and the light guide plate 110. The reflective sheet 170 can guide the light beam to the light exiting surface 114 to emit light, thereby increasing the light utilization efficiency of the light source module 100. The light source module 100 of the embodiment further includes a plurality of optical films 180 between the light emitting surface 114 and the frame 130 to optimize the optical characteristics of the light source module 100.

3 is a partial cross-sectional view showing a light source module of a comparative example. Referring to FIG. 3, the light source module 100A shown in FIG. 3 is similar to the light source module 100 of the embodiment. The difference between the two is that the composite structure 140A of the light source module 100A is different from the composite structure 140 of the light source module 100. The composite structure 140A includes only the reflective layer 142 in contact with the light guide plate 110, the second buffer layer 143 between the reflective layer 142 and the frame 130, and the third adhesive layer connecting the reflective layer 142 and the second buffer layer 143 (not drawn And a second adhesive layer (not shown) connecting the frame body 130 and the second buffer layer 143. 4 is a partial cross-sectional view showing a light source module of another comparative example. Referring to FIG. 4, the light source module 100B shown in FIG. 4 is similar to the light source module 100 of the embodiment. The difference between the two is that the composite structure 140B of the light source module 100B is different from the composite structure 140 of the light source module 100. The composite structure 140B includes only the second buffer layer 143 and a second adhesive layer (not shown) connecting the frame body 130 and the second buffer layer 143.

Table 1 below shows various optical characteristics of the light source module 100 of the present embodiment, the light source module 100A of FIG. 3, and the light source module 100B of FIG. Table 1 It is to be noted that the light source module 100A of FIG. 3 has a higher 9-point average brightness, 13-point average brightness, and 9-point uniformity compared to the light source module 100 of the present embodiment, but the reflective layer 142 of the light source module 100A. The light source module 100A is in contact with the light guide plate 110, so that the light source module 100A is prone to brightening light adjacent to the light emitting element 120. In addition, in the light source module 100B, since the second buffer layer 143 having optical scattering characteristics is in contact with the light guide plate 110, the light source module 100B is less likely to cause blooming halo, but it can be seen from Table 1 that compared with the present embodiment. In the light source module 100 of the example, the 9-point average brightness, the 13-point average brightness, and the 9-point uniformity of the light source module 100B are both low.

The above-mentioned 9-point average brightness refers to setting the light source module to the maximum brightness and dividing the light-emitting module light-emitting surface into 9 equal parts, and sequentially measuring the brightness values of the 9 equal parts and taking the average value thereof.

The above-mentioned 13-point average brightness refers to setting the light source module to the maximum brightness and dividing the light-emitting module light-emitting surface into 9 equal parts, and adding 13 positions in four corners of the light source module, and sequentially measuring the 13 positions. The brightness value is taken as the average value.

The above 9-point uniformity means that the light source module is set to the maximum brightness and the light-emitting module is divided into nine equal parts, and the brightness values of the nine equal parts are sequentially measured, and then the minimum of the nine brightness values is determined. The value is divided by the maximum value.

Combination method of composite structure and frame

FIG. 5 is a schematic flow chart of combining a composite structure and a frame according to an embodiment of the present invention. Referring to FIG. 5, the method for combining the composite structure and the frame of the embodiment includes the following steps. A frame having an inner surface is provided (step S100). A pre-composite structure is provided, the pre-composite structure including a reflective layer and a first pre-buffer layer on the reflective layer (step S200). A portion of the first pre-buffer layer is removed to form a first buffer layer, wherein the first buffer layer exposes at least one long side of the reflective layer, and the first buffer layer and the reflective layer form a composite structure (step S300). The reflective layer is fixed to the inner surface of the frame (step S400).

It should be noted that the order of the foregoing steps S100, S200, S300, and S400 can be appropriately changed. For example, in this embodiment, the composite structure and the frame may be combined in the order of step 200, step S300, step S100, and step S400. In other words, in this embodiment, a portion of the first pre-buffer layer may be removed to form a composite structure, and then the reflective layer of the composite structure is connected to the inner surface of the frame, wherein the reflective layer Between the inner surface of the frame and the first buffer layer. However, the present creation is not limited thereto. In other embodiments, step 200, step S100, step S400, and step S300 may also be used. In other words, in other embodiments, the reflective layer of the pre-composite structure may be first joined to the inner surface of the frame, and then the portion of the first pre-buffer layer may be removed to form a composite structure bonded to the frame.

The method of combining the composite structure and the frame according to an embodiment of the present invention will be described in detail below with reference to FIGS. 6A to 6C. 6A-6C are cross-sectional views showing a method of combining a composite structure and a frame according to an embodiment of the present invention. Referring to Figure 6A, first, a pre-composite structure 140C (shown in Figure 6A) is provided. The pre-composite structure 140C includes a reflective layer 142 and a first pre-buffer layer 144A on the reflective layer 142. The pre-composite structure 140C of the present embodiment further includes a first pre-adhesion layer 146A between the reflective layer 142 and the first pre-buffer layer 144A. The pre-composite structure 140C of the present embodiment further includes a second adhesive layer 148. The reflective layer 142 is between the second adhesive layer 148 and the first pre-buffer layer 144A. The pre-composite structure 140C of the present embodiment further includes a second buffer layer 143. The reflective layer 142 is located between the second buffer layer 143 and the first pre-buffer layer 144A. The pre-composite structure 140C of the present embodiment further includes a third adhesive layer 145 between the second buffer layer 143 and the reflective layer 142.

Referring to FIG. 6B, a portion of the first pre-buffer layer 144A is removed to form a first buffer layer 144. The first buffer layer 144 exposes the long side e of the reflective layer 142. Further, when a portion of the first pre-buffer layer 144A is removed to form the first buffer layer 144, a portion of the first pre-adhesive layer 146A may be simultaneously removed to form a first adhesive layer 146, wherein The edge of an adhesive layer 146 substantially coincides with the edge of the first buffer layer 144. Second in sequence The adhesive layer 148, the second buffer layer 143, the third adhesive layer 145, the reflective layer 142, the first adhesive layer 146, and the first buffer layer 144 may form the composite structure 140 of the present embodiment.

Referring to FIG. 6C, the composite structure 140 is then affixed to the inner surface 132 of the frame 130. In detail, in the embodiment, the reflective layer 142 is sequentially connected to the inner surface 132 of the frame 130 through the third adhesive layer 145, the second buffer layer 143, and the second adhesive layer 148. The second adhesive layer 148 is in contact with the inner surface 132 of the frame 130. Here, the composite structure 140 of the present embodiment is combined with the frame 130.

Light source module manufacturing method

The manufacturing method of the light source module of this embodiment is as follows. Referring to FIG. 6A to FIG. 6C, first, the composite structure 140 is combined with the frame 130. Referring to FIG. 1, next, a light guide plate 110 and at least one light emitting element 120 are provided. The light guide plate 110 has a light incident surface 112 and a light exit surface 114 connected to the light incident surface 112. The light emitting element 120 is located beside the light incident surface 112. Then, the frame 130 and the composite structure 140 fixed to the inner surface 132 of the frame 130 cover the light emitting element 120 and the light guide plate 110. The reflective layer 142 is located between the light-emitting surface 114 and the frame 130 and covers a portion of the light-emitting surface 114. The reflective layer 142 extends from the light exit surface 114 to the light emitting element 120. The first buffer layer 144 is located between the light-emitting surface 114 and the reflective layer 142 and covers a portion of the light-emitting surface 114. The first buffer layer 144 has a first side 144a that faces the light emitting element 112. The first side 144a is substantially coplanar with the light incident surface 112, but assembly tolerances to a certain extent, such as about ±0.5 mm, may be tolerated. Here, the fabrication of the light source module 100 of the present embodiment is completed.

In summary, the light source module of the embodiment of the present invention has at least one of the following advantages: in the light source module of the embodiment of the present invention, the reflective layer and the first buffer layer are stacked on top of each other instead of the conventional one. Technology is arranged side by side. Therefore, when the frame width of the backlight module needs to be narrowed, the width of the reflective layer and the first buffer layer need not be excessively reduced. The reflective layer and the first buffer layer can still have a certain width, so that the manufacturer can easily fix the reflective layer and the first buffer layer on the frame, thereby improving the manufacturing yield of the light source module.

In addition, in the light source module of the embodiment of the present invention, the side of the first buffer layer of the composite structure may be substantially aligned with the light incident surface without shielding the portion of the reflective layer protruding from the light incident surface. The reflective layer of the portion can reflect the light beam emitted by the light-emitting element into the light guide plate, thereby increasing the light coupling efficiency of the light source module.

In addition, in the light source module of the embodiment of the present invention, the thickness of the first buffer layer of the composite structure can be very thin, and the height difference between the reflection of the reflective layer and the light guide plate is not excessive. In this way, when the light beam is reflected back into the light surface through the reflective surface, it is not easily absorbed by the first side of the first buffer layer, and thus the light coupling efficiency of the light source module is not easily affected.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited by this, that is, the simple equivalent change and modification made by the applicant according to the scope of the patent application and the content of the creation description, They are still covered by this creation patent. In addition, any embodiment or patent application scope of the present invention is not required to achieve all of the objects or advantages disclosed in the present disclosure or Features. In addition, the abstract sections and headings are only used to assist in the search for patent documents and are not intended to limit the scope of the invention.

The terms “first”, “second” and the like mentioned in the specification or the scope of the patent application are used only to name the elements or to distinguish different embodiments or ranges, and are not intended to limit the upper or lower limit of the number of elements. .

100, 100A, 100B‧‧‧ light source module

110‧‧‧Light guide plate

112‧‧‧Into the glossy surface

114‧‧‧Glossy surface

114a‧‧‧Main areas

114b‧‧‧Edge area

120‧‧‧Lighting elements

122‧‧‧Lighting surface of the light-emitting element

130‧‧‧ frame

132‧‧‧The inner surface of the frame

140, 140A, 140B‧‧‧ composite structure

140C‧‧‧Pre-composite structure

142‧‧‧reflective layer

143‧‧‧Second buffer layer

142a‧‧‧The reflective layer protrudes from the entrance surface

142b‧‧‧reflecting surface

144‧‧‧First buffer layer

144A‧‧‧First pre-buffer layer

144a‧‧‧ first side

144b‧‧‧ bottom

145‧‧‧ third adhesive layer

146‧‧‧First adhesive layer

146A‧‧‧First pre-adhesive layer

146a‧‧‧ second side

148‧‧‧Second Adhesive Layer

150‧‧‧ Backplane

160‧‧‧ radiator

170‧‧‧reflector

180‧‧‧Optical diaphragm

D1, d2, d3‧‧ thickness

E‧‧‧ long side of the reflective layer

S100~S400‧‧‧Steps

W‧‧‧Width

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

2 is a partially enlarged schematic view of the composite structure, the frame body and the light guide plate of FIG. 1.

3 is a partial cross-sectional view showing a light source module of a comparative example.

4 is a partial cross-sectional view showing a light source module of another comparative example.

FIG. 5 is a schematic flow chart of combining a composite structure and a frame according to an embodiment of the present invention.

6A-6C are cross-sectional views showing a method of combining a composite structure and a frame according to an embodiment of the present invention.

100‧‧‧Light source module

110‧‧‧Light guide plate

112‧‧‧Into the glossy surface

114‧‧‧Glossy surface

114a‧‧‧Main areas

114b‧‧‧Edge area

120‧‧‧Lighting elements

122‧‧‧Lighting surface of the light-emitting element

130‧‧‧ frame

132‧‧‧The inner surface of the frame

140‧‧‧Composite structure

142‧‧‧reflective layer

143‧‧‧Second buffer layer

142a‧‧‧The reflective layer protrudes from the entrance surface

144‧‧‧First buffer layer

144b‧‧‧ bottom

150‧‧‧ Backplane

160‧‧‧ radiator

170‧‧‧reflector

180‧‧‧Optical diaphragm

W‧‧‧Width

Claims (12)

A light source module includes: a light guide plate having a light incident surface and a light emitting surface connected to the light incident surface; at least one light emitting element located adjacent to the light incident surface and adapted to emit a light beam The light-incident surface enters the light guide plate and exits the light guide plate via the light-emitting surface; a frame covering the light-emitting element, the light-incident surface and a portion of the light-emitting surface; and a composite structure comprising: a reflective layer The light-emitting surface and the frame cover a portion of the light-emitting surface, the reflective layer extends from the light-emitting surface toward the light-emitting element and protrudes from the light-incident surface; and a first buffer layer is located on the light-emitting surface The reflective layer covers a portion of the light exiting surface, and the first buffer layer has a first side facing the light emitting element, the first side being substantially coplanar with the light incident surface. The light source module of claim 1, wherein the composite structure further comprises: a first adhesive layer connecting the reflective layer and the first buffer layer. The light source module of claim 2, wherein the first adhesive layer has a second side facing the light emitting element, and the second side and the first side are substantially coplanar with the light incident surface. The light source module according to claim 1, wherein the complex The structure further includes: a second adhesive layer connecting the reflective layer and the frame. The light source module of claim 1, wherein the composite structure further comprises: a second buffer layer between the frame and the reflective layer. The light source module of claim 5, wherein an edge of the second buffer layer substantially coincides with an edge of the reflective layer. The light source module of claim 5, wherein the composite structure further comprises: a third adhesive layer connecting the second buffer layer and the reflective layer. The light source module of claim 5, wherein the thickness of the first buffer layer is smaller than the thickness of the second buffer layer. The light source module of claim 5, wherein the composite structure further comprises: a second adhesive layer between the second buffer layer and the frame. The light source module of claim 1, wherein the first buffer layer has a thickness smaller than a thickness of the reflective layer. The light source module of claim 1, wherein the first buffer layer is in contact with the light exiting surface. The light source module of claim 1, further comprising: a backing plate carrying the light emitting component, the composite structure and the light guiding plate, wherein the frame body and the backing plate jointly hold the light guiding plate through the composite structure .