TWI627480B - Light source module - Google Patents

Abstract

A light source module. The light source module comprises a frame, at least one fixing member, at least one light source unit, a light guide plate and a reflector. The frame further includes a bottom frame having a hollow portion and a plurality of side walls on the bottom frame. A fixing member having a stepped structure is provided on the first bottom frame portion. The light source unit is disposed on the second bottom frame portion of the bottom frame relative to the first bottom frame portion. The fixing member further includes a first step portion and a second step portion shorter than the first step portion. The first step portion is disposed on the first bottom frame portion, and the second step portion is disposed on the first step portion to define an extended portion on the first step portion. The light guide plate is disposed on the second step portion. The reflector is disposed on the extended portion of the first step.

Description

Light source module

The invention relates to a light source module, and in particular to a light source module with a narrow frame.

In recent years, mobile devices have become the trend of today's technology, including electronic devices such as tablet PCs, e-books, and mobile navigation (GPS). In order to facilitate the carrying of mobile devices, mobile devices strive to become thinner and lighter. Therefore, the light source module of the mobile device is also required to be narrow.

Furthermore, in order to facilitate the operation of the mobile device, the above-mentioned mobile device is often accompanied by the use of an electronic pen. It is used in the frame of the mobile device to attach a Digitizer sensor board, and can be used with an electronic pen. However, the electronic pen sensor board is susceptible to metal. Therefore, in order to prevent the metal frame of the mobile device from interfering with the interaction between the electronic pen sensor board and the electronic pen, it is necessary to narrow the metal frame of the mobile device.

At present, when the light source module is assembled in the industry, the light guide plate and the reflector of the light source module are respectively fixed in the frame by a plurality of fixing members. However, in order to avoid the generation of bright lines of the light source module, a certain distance is required between the light guide plate and the reflector. Therefore, how to fix the light guide plate and the reflector at the same time in a narrow bottom frame area is more difficult. Furthermore, when assembling the light source module, it is necessary to simplify the cumbersome steps of fixing the light guide plate and the reflector with a plurality of fixing members, respectively. Improve the yield of the light source module during the assembly process.

In view of this, it is urgent to propose a light source module to improve the shortcomings of the above light source module.

Therefore, an aspect of the present invention provides a light source module in which a light guide plate and a reflector are simultaneously fixed in a narrow frame by at least one fixing member having a stepped structure, and the assembly of the light source module is simplified. Steps to improve the yield of the light source module during the assembly process.

According to another aspect of the present invention, a light source module is provided. The fixing member having a stepped structure is respectively disposed at a relative position of the frame, and the light guide plate and the reflector are simultaneously fixed to the narrow frame. Inside, the steps of assembling the light source module are simplified to improve the yield of the light source module during the assembly process.

According to the above object of the present invention, a light source module is provided. The light source module comprises a frame, at least one fixing member, at least one light source unit, a light guide plate and a light reflecting plate.

The frame further includes a bottom frame having a hollow portion and a plurality of side walls on the bottom frame.

At least one fixing member having a stepped structure is disposed on the first bottom frame portion of the bottom frame. The fixing member further includes a first step portion disposed on the first bottom frame portion and a second step portion disposed shorter than the first step portion. The second step portion is disposed on the first step portion to define an extension portion on the first step portion.

At least one light source unit is disposed on the second bottom frame portion of the bottom frame, The middle second bottom frame portion is opposite to the first bottom frame portion. The light guide plate is disposed on the second step portion. The reflector is disposed on the extended portion of the first step.

According to the above object of the present invention, a light source module is provided. The light source module comprises a frame, two fixing members, at least one light source unit, a light guide plate and a reflector.

The frame further includes a bottom frame and a plurality of side walls on the bottom frame. The bottom frame has a hollow portion, and surrounds the first bottom frame portion, the second bottom frame portion and the third bottom frame portion of the hollow portion. The first bottom frame portion is located between the first bottom frame portion and the second bottom frame portion with respect to the second bottom frame portion.

Two fixing members having a stepped structure are respectively disposed on the first bottom frame portion and the second bottom frame portion. Each of the fixing members includes a first step portion disposed on the bottom frame and a second step portion disposed shorter than the first step portion. The second step portion is disposed on the first step portion to define an extension portion on the first step portion.

At least one light source unit is disposed on the third bottom frame portion. The light guide plate is disposed on the second step of each of the fixing members. The reflector is disposed on the extended portion of the first step of each of the fixing members.

The invention has the advantages that the light guide plate and the reflector are simultaneously fixed in the narrow frame by the fixing member having the stepped structure, thereby simplifying the steps of assembling the light source module and improving the assembly process of the light source module. Yield.

100‧‧‧Light source module

110‧‧‧Frame

112‧‧‧ bottom frame

112a‧‧‧Face Department

112b‧‧‧ first bottom frame

112c‧‧‧second bottom frame

114‧‧‧ side wall

120‧‧‧Fixed parts

122‧‧‧First Step

122a‧‧‧Extension

122b‧‧‧Depression

124‧‧‧second step

126‧‧‧Light source unit

128‧‧‧Light guide

130‧‧‧reflector

200‧‧‧Light source module

220‧‧‧Fixed parts

222‧‧‧First Step

224‧‧‧ second step

300‧‧‧Light source module

310‧‧‧shims

400‧‧‧Light source module

412a‧‧‧镂空部

412b‧‧‧ first bottom frame

412c‧‧‧ second bottom frame

412d‧‧‧ first bottom frame

X, Y‧‧ direction

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. FIG. 1 is a schematic exploded view of a light source module according to an embodiment of the invention.

FIG. 2 is a schematic diagram showing the combination of a light source module according to an embodiment of the present invention.

FIG. 3A is a schematic cross-sectional view showing a light source module according to an embodiment of the invention.

FIG. 3B is a schematic cross-sectional view showing a light source module according to another embodiment of the present invention.

3C is a cross-sectional structural view showing a light source module according to still another embodiment of the present invention.

FIG. 4 is a schematic exploded view of a light source module according to another embodiment of the present invention.

FIG. 5 is a schematic diagram showing the combination of a light source module according to another embodiment of the present invention.

The making and using of the present invention are discussed in detail below. However, it will be appreciated that the embodiments provide many applicable inventive concepts that can be implemented in a wide variety of specific content. However, the specific embodiments discussed are illustrative only and are not intended to limit the scope of the invention.

Referring to FIG. 1 , FIG. 2 and FIG. 3A , FIG. 1 is a schematic exploded view of a light source module 100 according to an embodiment of the invention, and FIG. 2 is a diagram illustrating an embodiment of the present invention. A schematic diagram of the combination of the light source modules 100. FIG. 3A is a schematic cross-sectional view of a light source module 100 according to an embodiment of the invention.

The light source module 100 includes a frame 110, at least one fixing member 120, At least one light source unit 126, and a plurality of optical sheets stacked on each other, wherein the plurality of optical sheets are disposed adjacent to the light source unit 126 to convert the light emitted by the light source unit 126 into a surface light source. In this embodiment, one of the plurality of optical plates is a first optical plate, which is a light guide plate 128. Below the first optical plate, a second optical plate is a reflective plate 130. Referring to FIG. 1 , the edge of one side of the light guide plate 128 is the same as the edge of the same side of the reflector 130 , that is, the edge of one side of the first optical plate is the same as that of the second optical plate. The edge of one side extends to the same length along a first direction X, and is more convex in a second direction Y different from the first direction X, wherein the first direction X and the second direction Y Perpendicular to each other. In addition, the light guide plate 128, the light reflecting plate 130, the first direction X and the second direction Y are all examples, and should not be limited to the description of the embodiment. In this embodiment, the light source unit 126 can be, for example, a light emitting diode, a laser diode, other suitable point light sources, or a combination of the above point light sources. In another embodiment, the light source unit 126 can be a line source such as a cold cathode tube, a fluorescent tube, other suitable line source, or a combination of the above line sources.

The frame 110 includes a bottom frame 112 and a plurality of bottom frames 112 Side walls 114. The bottom frame 112 has a hollow portion 112a. The side wall 114 and at least one fixing member 120 having a stepped structure are disposed on the first bottom frame portion 112b of the bottom frame 112. The fixing member 120 includes a first step portion 122 and a second step portion 124. The first step portion 122 is disposed on the first bottom frame portion 112b, and the second step portion 124 is shorter than the first step portion 122 and is disposed. On the first step portion 122, an extended portion 122a defined on the first step portion 122 is defined. The thickness of the fixing member 120 of the present embodiment may be 0.03 to 0.05 mm (mm), but the embodiment of the present invention is not limited thereto. In an embodiment, the first step portion 122 and the second step portion 124 are integrally formed.

In this embodiment, the light source module 100 includes at least one fixing member. 120, and the fixing member 120 is disposed on the first bottom frame portion 112b, and the light source unit 126 is disposed on the second bottom frame portion 112c, but the embodiment of the present invention is not limited thereto. In other embodiments of the present invention, the light source module 100 may be provided with only one fixing member 120 on any of the bottom frame portions of the second bottom frame portion 112c. The manner in which the fixing member 120 and the frame 110 are combined may be adhered, attached, welded, or the like.

Here, the group of the light source module 100 is exemplified by welding. Loading process. First, the light source unit 126 is assembled to the second bottom frame portion 112c of the bottom frame 112, and then the fixing member 120 is soldered to the first bottom frame portion 112b and the side wall 114 of the bottom frame 112. In order to avoid damage to the light source unit 126 caused by the heat input during welding, the welding method is selected from a combination of low-input laser welding, high-frequency welding, electron beam welding, other suitable welding methods, or a combination of the above welding methods. It is worth mentioning that the above-mentioned laser welding can be no material welding or material welding. After the soldering is completed, the light guide plate 128 and the light reflecting plate 130 are respectively disposed on the extended portion 122a of the second step portion 124 and the first step portion 122, so that the assembly of the light source module 100 can be completed.

In addition, the fixing member 120 may be first welded to the bottom frame 112. The first bottom frame portion 112b and the side wall 114 are assembled with the light source unit 126 The second bottom frame portion 112c of the bottom frame 112 of the frame 110 is used to increase the application of the light source module 100 to various processes. This type of assembly also has fewer restrictions on the choice of welding method. For example, it is possible to use a combination of plasma welding, friction welding, argon welding or the above welding method with high input heat and low welding cost.

The material of the fixing member 120 may be a polymer material, a metal material, or a combination of the above materials. The fixing member 120 can also be made of a material that can be transparent or semi-transparent to avoid interference caused by the light source unit 126 due to the setting of the fixing member 120, thereby causing the light source module 100 to form a dark area.

As can be seen from the above description, the light source module 100 of the present embodiment can fix the light guide plate 128 and the light reflecting plate 130 to the bottom frame 112 by the fixing member 120 in the narrow bottom frame 112. By the support of the fixing member 120, the light guide plate 128 and the reflector 130 can be prevented from colliding with the light source unit 126 due to gravity or shaking, and the light source unit 126 is damaged. Moreover, by fixing the fixing member 120, the light guide plate 128 and the reflection plate 130 can be prevented from shaking, and the distance between the light guide plate 128 and the reflection plate 130 can be fixed.

Please refer to FIG. 3B. FIG. 3B is a cross-sectional structural diagram of a light source module 200 according to another embodiment of the present invention. The light source module 200 is similar to the light source module 100, but the difference is that the first step portion 122 and the second step portion 124 of the fixing member 120 of the light source module 100 are integrally formed, and the embodiment is fixed. The first step portion 222 and the second step portion 224 of the member 220 are separated structures, thereby increasing the versatility of the light source module.

The first step portion 222 and the second step portion 224 of the fixing member 220 can be It is formed of the same material and can also be formed of a different material. For example, the fixing member 220 can be a two-layer material structure, the inner layer is made of a metal material, and the outer layer is a polymer material. The metal material of the inner layer can withstand the heat generated by the light source unit 126. The outer layer of the polymer material has an impact resistance characteristic, and the light guide plate 128 and the light reflection plate 130 can be prevented from being damaged due to collision.

In addition, the light source module 200 can optionally include a plurality of elastomers (not shown) according to the requirements of the device. The elastic system is disposed within the frame 110. The elastic body can apply a spring force to the light guide plate 128 and the light reflecting plate 126, and fix the light guide plate 128 between the fixing member 220 and the elastic body, or fix the light reflecting plate 130 between the fixing member 120 and the elastic body. When the light source module 200 is shaken, the light source module 200 can be prevented from being inefficient due to the displacement of the light guide plate 128 and the light reflecting plate 130. Such elastomers may be springs, thermoplastic elastomers, or combinations of the foregoing.

Referring to FIG. 3C, FIG. 3C is a cross-sectional structural diagram of a light source module 300 according to still another embodiment of the present invention. The light source module 300 is similar to the light source module 100, but the difference is that the light source module 300 further includes a spacer 310. The spacer 310 is disposed on the second step portion 124 of the fixing member 120 to form a recess portion 122b with the first step portion 122 and the second step portion 124. In this embodiment, the fitting of the recessed portion 122b and the light reflecting plate 130 can be achieved by a tight fit, a fastening, or a combination of the above fixing methods.

In addition, the gasket 310 of the embodiment can also be integrally formed with the fixing member 120 to improve the convenience of assembly.

A light source module according to another embodiment of the present invention will be described below. Please refer to FIG. 4 and FIG. 5 , and FIG. 4 illustrates another embodiment of the present invention. An exploded view of the light source module 400. FIG. 5 is a schematic diagram showing the combination of a light source module 400 according to an embodiment of the present invention. The light source module 400 is similar to the light source module 100, but the light source module 400 includes two fixing members 120 respectively disposed on the first bottom frame portion 412b and the second bottom frame portion 412c of the bottom frame.

The bottom frame 112 of the light source module 400 has a hollow portion 412a surrounding the first bottom frame portion 412b, the second bottom frame portion 412c, and the third bottom frame portion 412d of the hollow portion 412a. The first bottom frame portion 412b is opposed to the second bottom frame portion 412c, and the third bottom frame portion 412d is located between the first bottom frame portion 412b and the second bottom frame portion 412c.

The first bottom frame portion 412b and the second bottom frame portion 412c are respectively provided with fixing members 120, and the third bottom frame portion 412d is provided with a light source unit 126.

The light guide plate 128 is disposed on the second step portion 124 of the fixing member 120, and the reflector 130 is disposed on the extended portion 122a of the first step portion 122.

The light guide plate 128 and the light reflecting plate 130 are more smoothly fixed to the frame 110 having a narrow frame by the fixing members 120 respectively disposed on the first bottom frame portion 412b and the second bottom frame portion 412c on opposite sides of the bottom frame 112. Inside.

In summary, when the light source module 100, 200, 300 or 400 of the embodiment of the present invention is used, the light guide plate 128 and the light reflection plate 130 are simultaneously fixed to the frame with a narrow frame by the fixing member 120 or 220 having a stepped structure. The frame 110 is configured to simplify the steps of assembling the light source module 100, 200, 300 or 400 to improve the yield of the light source module 100 during the assembly process. In one embodiment, the light source module can be combined with an optical film such as a brightness enhancement film and a diffusion sheet to form a backlight module for use in a liquid crystal display.

It should be noted that the present invention is not limited to this, and the present invention is not limited thereto, although the present invention is exemplified by a specific device or the like, and the light source module of the present invention is described. Within the spirit and scope of the present invention, the light source module of the present invention can also be implemented using other grades of equipment or the like.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art to which the invention pertains can be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (11)

A light source module comprising: a light source unit; and an optical plate on which a plurality of sheets are stacked on each other, adjacent to the light source unit, to convert the light emitted by the light source unit into a surface light source, and one of the optical plates An edge of one side of an optical plate is extended to the same length along a first direction with respect to an edge of the same side of a second optical plate below it, in a second direction different from the first direction The light source module further includes a frame and at least one fixing member, the at least one fixing member and the frame are coupled to each other, the at least one fixing member comprises: a first step portion; and a second portion The step portion is shorter than the first step portion; wherein an edge of the first optical plate is more convex than an edge of the second optical plate below the second optical plate. The light source module of claim 1, wherein the frame comprises: a bottom frame having a hollow portion, a first bottom frame portion surrounding the hollow portion, and a second bottom frame portion, wherein the second frame The bottom frame portion is opposite to the first bottom frame portion. The light source module of claim 2, wherein the at least one fixing member is disposed on the first bottom frame portion of the bottom frame. The light source module of claim 2, wherein the light source unit is disposed on the second bottom frame portion of the bottom frame. The light source module of claim 1, wherein the frame comprises: a bottom frame having a hollow portion and a first bottom frame portion, a second bottom frame portion and a third bottom frame portion surrounding the hollow portion The first bottom frame portion is opposite to the second bottom frame portion, and the third bottom frame portion is located between the first bottom frame portion and the second bottom frame portion. The light source module of claim 5, further comprising: two fixing members disposed on the first bottom frame portion and the second bottom frame portion, respectively. The light source module of claim 5, wherein the light source unit is disposed on the third bottom frame portion. The light source module of claim 1, wherein the first optical plate is a light guide plate, and the second optical plate is a light reflection plate. The light source module of claim 1, wherein the first direction and the second direction are perpendicular to each other. A backlight module comprising the light source module according to claim 1. A liquid crystal display comprising the backlight module of claim 10.