TW201730647A - Display device and light source module - Google Patents

Abstract

A display device including a light source module having a substrate, a light source, and a reflection sheet is provided. The reflection sheet is disposed on a bottom surface and a plurality of side surfaces of the substrate, and configured for reflecting the light beam from the light source. A distribution area of micro structures of the reflection sheet are corresponded to at least one of the side surfaces, and the distribution area of the micro structures has a least one first distribution region and a least one second distribution region. When a density distribution of the micro structures located in the first distribution region is not equal to a density distribution of the micro structures located in the second distribution region, the brightness formed by the light beam at the first distribution region is equal to the brightness formed by the light beam at the second distribution region.

Description

Display device and light source module

The present invention relates to a display device, and more particularly to a display device having a light source module that can provide a uniform surface light source.

The direct light source module adopts a light source module having a plurality of light emitting diodes and is disposed under the liquid crystal display panel, and covers the diffusion plate with a diffusion plate at a suitable distance (mixing distance). The diffuser plate is used to uniformly disperse the light beam emitted by the light source module.

However, in order to reduce the cost or achieve a thin design of the product, reducing the number of light-emitting diodes used or shortening the light-mixing distance may result in uneven display brightness, for example, appearing on both sides of the display screen. In the dark part, even in the four side areas, uneven brightness occurs, which will seriously affect the display quality of the display device. Therefore, how to improve the above problems is the focus of the relevant personnel in the field.

The "Prior Art" section is only intended to aid in understanding the present invention, and thus the disclosure of the prior art paragraphs may contain some conventional techniques that are not known to those of ordinary skill in the art. The content disclosed in the "Prior Art" section does not represent the content or the problem to be solved by one or more embodiments of the present invention, nor does it mean that it is known to those of ordinary skill in the art or prior to the present application. Cognition.

One of the objects of the present invention is to provide a display device having a light source module that can provide a uniform surface light source.

It is still another object of the present invention to provide a light source module for providing a uniform surface light source in a display device.

In order to achieve some or all of the above or other purposes, the present invention provides a display device including a light source module and a display panel. The light source module includes a base, a light source, and a reflective sheet. The base has a bottom surface and a plurality of sides surrounding the bottom surface, and the side surface is connected to the bottom surface to form an accommodation space. The light source is located in the accommodating space and disposed on the bottom surface of the pedestal, and the light source is used to emit a light beam. The reflective sheet is disposed on the bottom surface and the side surface of the base for reflecting the light beam. The reflective sheet includes a plurality of microstructures, the microstructured regions correspond to at least one of the sides, and the microstructured regions have at least one first distribution region and at least one second distribution region. When the distribution density of the microstructures located in the first distribution region is not equal to the distribution density of the microstructures located in the second distribution region, the brightness of the light beam formed in the first distribution region is equal to the brightness formed by the light beam in the second distribution region. . The display panel is disposed on the light source module.

In an embodiment of the display device of the present invention, the light source includes a substrate and a plurality of light emitting elements arranged on the substrate, wherein the arrangement direction of the light emitting elements extends to at least one of the sides of the base to correspond to at least one of A first distribution area and does not correspond to at least one second distribution area.

In an embodiment of the display device of the present invention, the side faces of the susceptor are opposite sides of each other, and the microstructured regions of the reflective sheet correspond to the side faces.

In an embodiment of the display device of the present invention, the side faces of the susceptor are two side faces adjacent to each other, and the microstructured regions of the reflective sheet correspond to the side faces.

In an embodiment of the display device of the present invention, the region of the microstructure in which the reflective sheet is distributed corresponds to the side surface.

In an embodiment of the display device of the present invention, each of the microstructures of the reflective sheet is a hemispherical three-dimensional structure in which a curved arc protrudes toward the light source.

In an embodiment of the display device of the present invention, the light source module further includes a diffusion plate disposed on the transmission path of the light beam and located above the accommodation space.

In order to achieve one or a part or all of the above or other purposes, another aspect of the present invention provides a light source module including a base, a light source, and a reflective sheet. The base has a bottom surface and a plurality of sides surrounding the bottom surface, and the side surface is connected to the bottom surface to form an accommodation space. The light source is located in the accommodating space and disposed on the bottom surface of the pedestal, and the light source is used to emit a light beam. The reflective sheet is disposed on the bottom surface and the side surface of the base for reflecting the light beam. The reflective sheet includes a plurality of microstructures, the microstructured regions correspond to at least one of the sides, and the microstructured regions have at least one first distribution region and at least one second distribution region. When the distribution density of the microstructures located in the first distribution region is not equal to the distribution density of the microstructures located in the second distribution region, the brightness of the light beam formed in the first distribution region is equal to the brightness formed by the light beam in the second distribution region. .

In an embodiment of the light source module of the present invention, the light source comprises a substrate and a plurality of light emitting elements arranged on the substrate, wherein the arrangement direction of the light emitting elements extends to at least one of the sides of the base to correspond to At least one first distribution area and not corresponding to at least one second distribution area.

In an embodiment of the light source module of the present invention, the side surfaces of the susceptor are opposite sides of each other, and the microstructured regions of the reflective sheet correspond to the side surfaces.

In an embodiment of the light source module of the present invention, the side surface of the susceptor is two sides adjacent to each other, and the microstructured area of the reflective sheet corresponds to the side surface.

In an embodiment of the light source module of the present invention, the microstructured region of the reflective sheet corresponds to the side surface.

In an embodiment of the light source module of the present invention, each of the microstructures of the reflective sheet is a hemispherical three-dimensional structure in which a curved arc protrudes toward the light source.

In an embodiment of the light source module of the present invention, the light source module further includes a diffusion plate disposed on the transmission path of the light beam and located above the accommodation space.

Based on the above, the light-emitting module of the display device of the embodiment of the present invention has a plurality of microstructures on the reflective sheet, and the microstructure-distributed region corresponds to at least one of the plurality of sides of the susceptor. Through the region where the microstructure is distributed, the light beam emitted by the light source is projected onto the reflection sheet to form a distribution region with different brightness, which can be adjusted, thereby making the brightness of the overall surface light source uniform. In short, the microstructure of the reflective sheet of the light source module of the display device of the embodiment of the present invention may have different distribution densities according to the area/position of the light beam emitted by the light source onto the microstructure, so that the light source module provides The surface light source can have a uniform brightness.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The above and other technical contents, features and advantages 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 for the purpose of illustration and not limitation.

1 is a cross-sectional view of a display device in accordance with an embodiment of the present invention. 2 is a schematic perspective view of the light source module shown in FIG. 1. As shown in FIG. 1 and FIG. 2 , the display device 1 of the present embodiment includes a light source module 11 and a display panel 12 disposed on the light source module 11 . The light source module 11 includes a susceptor 111, a light source 112, and a reflection sheet 113. In this embodiment, the light source module 11 is, for example, a direct type light source module, but the invention is not limited thereto. The base 111 has a bottom surface 101 and a plurality of side surfaces 102 surrounding the bottom surface 101. The plurality of side faces 102 are connected to each other and to the bottom surface 101 to form the accommodation space 100. The light source 112 is disposed in the accommodating space 100 and disposed on the bottom surface 101 of the susceptor 111. The light source 112 is configured to emit a light beam. In the embodiment, the light source 112 is, for example, a light bar, but the invention is not limited thereto. The reflection sheet 113 is disposed on the bottom surface 101 and the side surface 102 of the susceptor 111. The reflection sheet 113 is for reflecting the light beam emitted by the light source 112.

In the present embodiment, the light source module 11 further includes a diffusion plate 114, and the diffusion plate 114 is disposed on the transmission path of the light beam emitted by the light source 112 and located above the accommodating space 100 of the susceptor 111. Specifically, in the embodiment, the light beam emitted by the light source 112 is reflected by the reflective sheet 113 to be irradiated to the diffusing plate 114, and the light beam emitted from the light source 112 is uniformly dispersed by the diffusing plate 114, and the light source module 11 can provide the luminous brightness. A uniform planar light source.

In the embodiment, the light source module 11 further includes an optical film set 115 disposed on the diffusion plate 114. Since the optical film set 115 is a technical means of the prior art and is not the focus of the present invention, the structure of the optical film set 115 will not be described in detail in the description of the embodiment.

The detailed configuration of the reflection sheet 113 of the present embodiment will be further described below.

As shown in FIG. 2, the reflective sheet 113 of the present embodiment includes a plurality of microstructures 1130, and the regions in which the plurality of microstructures 1130 are distributed correspond to at least one of the plurality of side surfaces 102 (eg, the right side surface 102 in FIG. 2). . Specifically, in the embodiment, the microstructure 1130 is formed on a portion of the reflective sheet 113 by heat pressing or other processes, that is, a reflective sheet disposed on at least one of the sides of the plurality of side surfaces 102. 113 (for example, the reflection sheet 113 on the right side in Fig. 2). In order to prevent the light beam emitted by the light source 112 from being projected onto the microstructure 1130 to form a block having different brightness, the distribution area of the microstructure 1130 of the embodiment has at least a first distribution area R1 and at least a second distribution area R2. The brightness of the beam emitted by source 112 is projected onto different blocks on microstructure 1130 for adjustment. Specifically, in the embodiment, the light source 112 includes two light strips 1121 and 1122, and the two strips 1121 and 1122 have a gap G1 therebetween. In this embodiment, the distance G1 between the two light strips 1121 and 1122 is maintained at an appropriate distance, and the light beam emitted by the light strip 1121 is projected, for example, in the first distribution area R1 in the lower part of FIG. 2, and the light is emitted. The light beam emitted by the strip 1122 is projected, for example, on the upper first distribution area R1 in FIG. That is to say, the light beams respectively emitted by the two light strips 1121 and 1122 are respectively projected on the first distribution area R1 near the light strips 1121 and 1122, and the light beams respectively emitted by the two light strips 1121 and 1122 are projected on the light beam. The distribution areas on the microstructures 1130, for example, do not overlap each other. In this embodiment, the microstructures 1130 that pass through different regions have different distribution densities (ie, the distribution density of the microstructures 1130 in the first distribution region R1 near the light-emitting strips 1121, 1122 is not equal to the distance from the light-emitting strips 1121, 1122. The distribution density of the microstructures 1130 in the second distribution region R2), the luminance of the first distribution region R1 formed by the microstructures 1130 of the regions near the light-emitting strips 1121, 1122 is equal to the microstructure of the region away from the light-emitting strips 1121, 1122 The brightness of the second distribution region R2 formed by 1130. That is, in the present embodiment, in order to prevent the light beam from being projected on the first distribution region R1 (the region near the light-emitting light strips 1121, 1122), the brightness is greater than the light beam projected on the second distribution region R2 (away from the light-emitting light strips 1121, 1122). The brightness of the region, the distribution density of the microstructures 1130 located in the first distribution region R1 is smaller than the distribution density of the microstructures 1130 located in the second distribution region R2. Under such a structural design, the amount of reflected light in a specific region (for example, the second distribution region R2) can be increased and/or the amount of reflected light in another specific region (for example, the first distribution region R1) can be decreased, thereby making the overall surface light source The brightness is even.

Compared with the conventional reflective sheet, since the reflective surface has only a flat surface, the reflection efficiency is extremely limited. The reflective sheet 113 of the present embodiment can have a larger reflective area due to the microstructure 1130 (for example, a convex hemispherical three-dimensional structure). In turn, the reflection efficiency is increased. In addition, the microstructures 1130 passing through different regions have different distribution densities, and different regions of the reflection sheet 113 may have different reflection effects to adjust the brightness of the light beams projected on different regions of the reflection sheet 113, thereby avoiding the reflection sheet 113. Has a bright or dark area.

In this embodiment, the number of microstructures 1130 located in the first distribution region R1 is smaller than the number of microstructures 1130 located in the second distribution region R2, so that the distribution density of the microstructures 1130 located in the first distribution region R1 can be less than The effect of the distribution density of the microstructures 1130 located in the second distribution region R2, but the invention is not limited thereto. In the present embodiment, under the premise that the distribution density of the microstructures 1130 can be adjusted, the remaining means for adjusting the distribution density of the microstructures 1130 can be employed depending on the actual situation.

In this embodiment, each of the light strips 1121, 1122 includes a substrate 1123 and a plurality of light emitting elements 1124 disposed on the substrate 1123. In the present embodiment, the arrangement direction A of the light-emitting elements 1124 extends to at least one of the side faces 102 of the susceptor 111 (eg, the right side surface 102 in FIG. 2) to correspond to the first distribution area R1 and does not correspond to the second Distribution area R2. In other words, the arrangement direction A of the light-emitting element 1124 of the present embodiment extends corresponding to the first distribution area R1 of the microstructure 1130, so that the occurrence of brightness in the first distribution area R1 and/or occurrence in the second distribution area R2 can be effectively avoided. A darker mood. In addition, in the present embodiment, each of the microstructures 1130 is, for example, a hemispherical three-dimensional structure (for example, a bump) protruding from the curved arc toward the light source 112, but the invention is not limited thereto. In this embodiment, under the premise that the amount of reflected light can be increased, the shape of each microstructure 1130 can be different depending on the actual situation.

However, in the present embodiment, the number of the light-emitting light strips is only one of the embodiments of the present invention, and the present invention is not limited thereto, and the number of the light-emitting light strips may be increased according to the actual situation. Less.

3 is a top plan view of a light source module according to another embodiment of the present invention. The structure of the light source module 11a of the embodiment shown in FIG. 3 is substantially similar to the structure of the light source module 11 shown in FIG. 2, and the difference is mainly that the distance G2 between the two light strips 1121 of the embodiment is smaller than The distance G1 between the two light strips 1121, 1122 as shown in FIG. That is, the two light strips 1121 in FIG. 3 are closer to each other than the two light strips 1121, 1122 shown in FIG. 2, so that the light beams respectively emitted by the two light strips 1121 are projected on the microstructure 1130 and present at least part. The phenomenon that the distribution areas overlap each other, for example, the partial light beams respectively emitted by the two light-emitting strips 1121 overlap the second distribution area R2'. However, the microstructures 1130 passing through different regions have different distribution densities (ie, the distribution density of the microstructures 1130 in the second distribution region R2' away from the light bar 1121 is not equal to the first distribution region R1' near the light bar 1121. The distribution density of the microstructures 1130), the brightness of the region (the first distribution region R1') at least partially overlapping the light beams formed by the two light-emitting strips 1121 may be equal to at least partially overlapping the light beams formed by the two light-emitting strips 1121. The brightness of the area (second distribution area R2'). That is to say, in the present embodiment, the light beams respectively emitted by the two light bar 1121 are projected on the microstructure 1130, and at least a part of the distribution regions (for example, the second distribution region R2') overlap each other. The brightness of the first distribution area R1′ is prevented from being smaller than the brightness of the second distribution area R2′, and the distribution density of the microstructures 1130 located in the first distribution area R1′ is greater than the distribution density of the microstructures 1130 located in the second distribution area R2′. In order to increase the amount of reflected light in the first distribution region R1' and/or reduce the amount of reflected light in the second distribution region R2', the brightness of the entire surface light source is made uniform.

In this embodiment, the number of microstructures 1130 located in the first distribution region R1' is greater than the number of microstructures 1130 located in the second distribution region R2' to reach the microstructures 1130 located in the first distribution region R1'. The distribution density is greater than the distribution density of the microstructures 1130 located within the second distribution region R2', but the invention is not limited thereto. In the present embodiment, under the premise that the distribution density of the microstructures 1130 can be adjusted, the remaining means for adjusting the distribution density of the microstructures 1130 can be employed depending on the actual situation.

The arrangement direction A' of the light-emitting elements 1124 of the light bar 1121 in FIG. 3 extends, for example, to one of the sides 102 of the susceptor 111 (eg, the right side 102 in FIG. 2) to correspond to the first distribution area R1' and Does not correspond to the second distribution area R2'. In this way, the present embodiment can prevent the distribution area (the first distribution area R1′) of the microstructure 1130 corresponding to the arrangement direction A′ of the light-emitting element 1124 from being dark (dark area) and/or the second distribution area R2. 'The situation where the brightness is brighter (bright area) occurs.

However, in order to clearly see the internal structure of the light source module 11, the light source modules 11 and 11a shown in FIGS. 2 and 3 omits the members such as the diffusion plate 114 and the optical film group 115 shown in FIG.

4 is a top plan view of a light source module according to another embodiment of the present invention. The light source module 11b of the embodiment shown in FIG. 4 is substantially similar to the light source module 11 shown in FIG. 2, and the difference is mainly that the area of the microstructure 1130b of the reflective sheet 113b of the present embodiment is distributed corresponding to the side surface 102. The two sides opposite each other (for example, the right side 1021 and the left side 1023 in Fig. 4). Specifically, the base 111 of the light source module 11b of the present embodiment has four sides 1021, 1022, 1023, and 1024 adjacent to each other, and the area where the microstructures 1130b of the reflective sheet 113b are distributed corresponds to the sides 1021 and 1023. However, in other embodiments, the regions in which the microstructures 1130b of the reflective sheet 113b are distributed may also correspond to the opposite sides 1022, 1024. Moreover, in some embodiments, the distribution density on the opposite sides 1021, 1023 (or opposite sides 1022, 1024) of the microstructures 1130b of the reflective sheet 113b may also be as designed as in FIG.

FIG. 5 is a top plan view of a light source module according to another embodiment of the present invention. The light source module 11c of the embodiment shown in FIG. 5 is substantially similar to the light source module 11 shown in FIG. 2, and the difference is mainly that the area of the microstructure 1130c of the reflective sheet 113c of the present embodiment is distributed corresponding to the side surface 102. Two sides adjacent to each other (for example, the right side 1021 and the upper side 1022 in FIG. 5). Specifically, the base of the light source module 11c of the present embodiment has four sides 1021, 1022, 1023, and 1024 adjacent to each other, and the area where the microstructures 1130c of the reflective sheet 113c are distributed corresponds to the side surfaces 1021, 1022. However, in other embodiments, the area in which the microstructures 1130c of the reflective sheet 113c are distributed may also correspond to the adjacent sides 1023, 1024. In addition, in some embodiments, the distribution density on the adjacent sides 1021, 1022 (or adjacent sides 1023, 1024) of the microstructure 1130c of the reflective sheet 113c may also be as designed as in FIG.

FIG. 6 is a top plan view of a light source module according to another embodiment of the present invention. The light source module 11d of the embodiment shown in FIG. 6 is substantially similar to the light source module 11 shown in FIG. 2, and the difference is mainly that the area of the microstructure 1130d of the reflective sheet 113d of the present embodiment is distributed corresponding to the side surface 102. On the four sides adjacent to each other. Specifically, the pedestal of the light source module 11d of the present embodiment has four sides 1021, 1022, 1023, and 1024 adjacent to each other, and the area of the microstructure 1130d of the reflective sheet 113d is distributed corresponding to the side 1021, 1022, and 1023. 1024. However, in other embodiments, the distribution density on the four sides 1021, 1022, 1023, 1024 of the microstructure 1130d of the reflective sheet 113d may also be as designed as in FIG.

In summary, in the display device of the embodiment of the present invention, the reflective sheet of the light source module has a plurality of microstructures, and the region of the microstructure distribution corresponds to at least one of the plurality of sides of the pedestal, in order to avoid the light source. The emitted light beam is projected onto the microstructure to form a distribution region with different brightness. By adjusting the distribution density of the microstructure in different distribution regions, the amount of reflected light in a specific region is increased and/or decreased, thereby making the brightness of the overall surface light source uniform. . In short, the microstructure of the reflective sheet of the light source module of the display device of the embodiment of the present invention may have different distribution densities according to the area/position of the light beam emitted by the light source onto the microstructure, so that the light source module provides The surface light source can have a uniform brightness.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. In addition, the terms "first", "second" and the like mentioned in the specification or the scope of the claims are only used to name the elements or distinguish different embodiments or ranges, and are not intended to limit the number of elements. Upper or lower limit.

1‧‧‧ display device
11, 11a, 11b, 11c, 11d‧‧‧ light source module
12‧‧‧ display panel
100‧‧‧ accommodating space
101‧‧‧ bottom
102, 1021, 1022, 1023, 1024‧‧‧ side
111‧‧‧Base
112‧‧‧Light source
113, 113b, 113c, 113d‧‧‧ reflection film
114‧‧‧Diffuser
115‧‧‧Optical diaphragm group
1121, 1122‧‧‧Light strips
1123‧‧‧Substrate
1124‧‧‧Lighting elements
1130, 1130b, 1130c, 1130d‧‧‧ microstructure
A, A'‧‧‧Arranged direction
G1, G2‧‧‧ spacing
R1, R1'‧‧‧ first distribution area
R2, R2'‧‧‧ second distribution area

1 is a cross-sectional view of a display device in accordance with an embodiment of the present invention. 2 is a schematic perspective view of the light source module shown in FIG. 1. 3 is a top plan view of a light source module according to another embodiment of the present invention. 4 is a top plan view of a light source module according to another embodiment of the present invention. FIG. 5 is a top plan view of a light source module according to another embodiment of the present invention. FIG. 6 is a top plan view of a light source module according to another embodiment of the present invention.

11‧‧‧Light source module

100‧‧‧ accommodating space

101‧‧‧ bottom

102‧‧‧ side

111‧‧‧Base

112‧‧‧Light source

113‧‧‧reflecting film

1121, 1122‧‧‧Light strips

1123‧‧‧Substrate

1124‧‧‧Lighting elements

1130‧‧‧Microstructure

A‧‧‧Arranged direction

G1‧‧‧ spacing

R1‧‧‧ first distribution area

R2‧‧‧Second distribution area

Claims (14)

A display device includes: a light source module, comprising: a base having a bottom surface and a plurality of sides surrounding the bottom surface, wherein the sides are coupled to the bottom surface to form an accommodation space; a light source is located at the The light source is disposed on the bottom surface of the pedestal, the light source is configured to emit a light beam, and a reflective sheet is disposed on the bottom surface of the pedestal and the side surfaces for reflecting the light beam, the reflective sheet Included in the plurality of microstructures, the regions of the microstructures corresponding to at least one of the sides, and the regions of the microstructures having at least one first distribution region and at least one second distribution region when located in the at least one When the distribution density of the microstructures in the first distribution region is not equal to the distribution density of the microstructures in the at least one second distribution region, the brightness of the light beam formed in the at least one first distribution region is equal to the light beam a brightness formed by the at least one second distribution area; and a display panel disposed on the light source module. The display device of claim 1, wherein the light source comprises a substrate and a plurality of light emitting elements arranged on the substrate, the light emitting elements are arranged to extend at least to at least one of the sides of the base One of the ones corresponding to the at least one first distribution area and not corresponding to the at least one second distribution area. The display device of claim 1, wherein the sides of the pedestal are opposite sides of each other, and the microstructured regions of the reflective sheet correspond to the sides. The display device of claim 1, wherein the sides of the pedestal are two sides adjacent to each other, and the microstructured regions of the reflective sheet correspond to the sides. The display device of claim 1, wherein the regions of the reflective sheet that are distributed by the microstructures correspond to the sides. The display device of claim 1, wherein each of the microstructures of the reflective sheet is a hemispherical three-dimensional structure in which a curved arc protrudes toward the light source. The display device of claim 1, wherein the light source module further comprises a diffusion plate disposed on the transmission path of the light beam and located above the accommodation space. A light source module includes: a base having a bottom surface and a plurality of sides surrounding the bottom surface, wherein the sides are connected to the bottom surface to form an accommodation space; a light source is disposed in the accommodation space and configured a light source for emitting a light beam on the bottom surface of the pedestal; and a reflective sheet disposed on the bottom surface and the side surfaces of the pedestal for reflecting the light beam, the reflective sheet comprising a plurality of microstructures The regions of the microstructure distribution correspond to at least one of the sides, and the regions of the microstructure distribution have at least a first distribution region and at least a second distribution region, when located in the at least one first distribution region When the distribution density of the microstructures is not equal to the distribution density of the microstructures in the at least one second distribution region, the brightness of the light beam formed in the at least one first distribution region is equal to the light beam at the at least one second distribution The brightness formed by the area. The light source module of claim 8, wherein the light source comprises a substrate and a plurality of light emitting elements arranged on the substrate, the light emitting elements are arranged to extend at least to the sides of the base One of them corresponds to the at least one first distribution area and does not correspond to the at least one second distribution area. The light source module of claim 8, wherein the sides of the pedestal are opposite sides of each other, and the microstructured regions of the reflective sheet correspond to the sides. The light source module of claim 8, wherein the sides of the pedestal are two sides adjacent to each other, and the microstructured regions of the reflective sheet correspond to the sides. The light source module of claim 8, wherein the regions of the reflective sheet that are distributed by the microstructures correspond to the sides. The light source module of claim 8, wherein each of the microstructures of the reflective sheet is a hemispherical three-dimensional structure in which a curved arc protrudes toward the light source. The light source module of claim 8, further comprising a diffusing plate disposed on the transmission path of the light beam and located above the receiving space.