TWM577955U - Backlight module and display device - Google Patents

Abstract

A backlight module includes a light source unit including a carrier and a plurality of light sources, a positioning member, and an optical film. The carrier has a bearing surface and a rear surface opposite to the bearing surface. The plurality of light sources are disposed on the bearing surface. The positioning member is disposed on the carrier. The optical film has a positioning portion and is disposed on one side of the carrier. The positioning portion is positioned by the positioning member to limit movement of the optical film relative to the carrier. A display device includes the backlight module and a backplate disposed on one side of the backlight module. The rear surface of the carrier is substantially fitted to the inner surface of the backplate.

Description

Backlight module and display device

The present invention relates to a backlight module and a display device. Specifically, the present invention relates to a backlight module capable of positioning an optical film and a display device including the same.

Planar and curved display devices have been widely used in various types of electronic devices, such as mobile phones, personal wearable devices, televisions, host computers, personal computers, digital cameras, handheld video games, and the like. However, in order to improve the user's visual experience, the industry continues to improve the optical performance of the display device.

In the case of conventional display devices, the optical film of the display device is typically positioned by the backing plate. In order to position the relative positional relationship between the optical film and the display panel, the optical film is usually riveted to the back plate by using a steel column on the non-light-in side of the back plate, or the optical film is positioned on the back plate to form a positioning mechanism. Avoid excessive movement of the optical diaphragm. However, with the development of narrow bezel or borderless design, the space available for positioning design is greatly reduced, and the problem of edge quality of the visible area often occurs, such as uneven brightness, light leakage or uneven light mixing at the edge positioning structure of the optical film. .

The present invention provides a backlight module that positions an optical film by a light source unit.

In one embodiment, the backlight module of the present invention includes a light source unit, a positioning member, and light. The light source unit comprises a carrier plate and a plurality of light sources, the carrier plate has opposite bearing surfaces and a back surface, and the plurality of light sources are disposed on the bearing surface; the positioning member is disposed on the carrier plate; the optical film has a positioning portion and is disposed on the carrier plate On one side, the positioning portion is positioned on the positioning member to limit the movement of the optical film relative to the carrier.

In one embodiment, the positioning member is a protrusion integrally formed with the carrier plate and protruding from the carrier plate.

In one embodiment, the positioning member includes a body portion and a protruding portion, and the body portion connects the protruding portion and is disposed on the carrier, and the protruding portion protrudes from the carrier.

In an embodiment, the positioning portion is a tongue portion including a positioning hole, and the positioning hole is sleeved on the protruding portion.

In one embodiment, the thickness of the protrusion is smaller than the distance between the bearing surface and the back surface in the normal direction of the parallel bearing surface.

In one embodiment, the positioning member further includes an extension portion, the body portion is connected to the extension portion and the protrusion portion, and the body portion is disposed on one of the bearing surface and the back surface of the carrier board, and the extension portion faces the other of the bearing surface and the back surface. extend.

In one embodiment, the positioning member has a more limited portion, and the limiting portion extends from the protruding portion away from the one end of the carrier plate toward the back surface to define an accommodation space between the limiting portion and the carrier.

In one embodiment, the carrier has a receiving groove, and the receiving groove is disposed on the back surface; the body portion is disposed in the receiving groove of the carrier and is substantially coplanar with the back surface.

In an embodiment, the carrier plate further has a groove, and the groove corresponding protrusion is formed on the opposite side of the carrier, and the extension extends in the groove.

In one embodiment, the body portion includes a non-conductive material and is disposed on the bearing surface. to In another embodiment, the body portion includes a heat conductive material and is disposed on the back surface.

In one embodiment, the body portion is disposed on the bearing surface and has a retracting region, and one of the plurality of light sources is disposed adjacent to the body portion and extends into the retracting region.

In one embodiment, the width of the protrusion away from the carrier is greater than the width of the protrusion adjacent the carrier.

In one embodiment, the positioning member is a channel formed on the carrier, the positioning portion is a tongue extending from one side of the optical film, and the tongue extends into the channel.

In one embodiment, the backlight module includes a plurality of positioning members, and the plurality of positioning members are spaced along the length direction of the carrier board, and one of the plurality of positioning members is disposed in a central area of the carrier board, and the remaining positioning of the plurality of positioning members The pieces are symmetrically disposed on both side regions of the central zone with respect to the positioning members disposed in the central zone.

Another object of the present invention is to provide a display device that positions an optical film on a light incident side by a light source unit.

In one embodiment, the display device of the present invention comprises the backlight module and the back plate as described above, wherein the back plate is disposed on one side of the backlight module, and the back surface of the carrier plate and the inner surface of the back plate substantially completely fit.

In one embodiment, the backboard includes a bottom plate and a side wall, the side wall is erected to the bottom plate, the optical film is located above the bottom plate, and the positioning portion extends through the carrier plate to the upper side of the sidewall.

Compared with the prior art, the backlight module and the display device of the present invention effectively position the optical film by the light source unit, thereby simplifying the positioning design. Furthermore, the display device of the present invention positions the optical film on the light incident side by the light source unit, which not only enhances the design of the narrow frame or the frameless design, but also enhances the heat dissipation effect by the light source unit and the back plate.

1‧‧‧ display device

10‧‧‧Backlight module

100‧‧‧Light source unit

110‧‧‧ Carrier Board

110a‧‧‧Central District

110b‧‧‧ side area

111‧‧‧ top

112‧‧‧ bearing surface

113‧‧‧ bottom

114‧‧‧Back

115‧‧‧ Groove

116‧‧‧ accommodating slots

120‧‧‧Light source

130‧‧‧Connector

140‧‧‧Light guide plate

200‧‧‧ positioning parts

210, 210', 210", 210'''‧‧‧ protruding parts

300‧‧‧Optical diaphragm

310‧‧‧ Positioning Department

312‧‧‧Positioning holes

400, 500, 600, 700, 700', 800, 900‧‧‧ positioning parts

410, 510, 610, 810, 910‧‧ ‧ body

420, 520, 620, 820, 920 ‧ ‧ protrusions

430, 530, 630, 930‧‧‧ extensions

640, 940‧‧‧ Limitation Department

830‧‧‧Retracted area

20‧‧‧ Backplane

22‧‧‧floor

24‧‧‧ side wall

242‧‧‧ inside

30‧‧‧ display panel

L1‧‧‧ length direction

L2, L3‧‧‧ normal direction

T1, T2‧‧‧ thickness

FIG. 1A and FIG. 1B are schematic diagrams showing the decomposition and combination of a backlight module according to an embodiment of the invention.

2 is a side elevational view of a carrier and a positioning member according to an embodiment of the present invention.

3A and 3B are front elevational views of the carrier and the positioning member of the different embodiments of the present invention.

4A-4C are front, side, and top views of a carrier and a positioning member according to another embodiment of the present invention.

5A to 5C are schematic exploded, side exploded and combined schematic views of the carrier and the positioning member of another embodiment of the present invention.

6A and 6B are exploded and assembled schematic views of a carrier and a positioning member according to another embodiment of the present invention.

7A and 7B are side views of the carrier and the positioning member of the different embodiments of the present invention.

8A and 8B are front and side elevation views of a carrier and a positioning member according to another embodiment of the present invention.

Figure 8C is a front elevational view of the positioning member of Figure 8A.

9 is a side elevational view of a carrier and a positioning member according to another embodiment of the present invention.

10 and FIG. 11 are partially enlarged schematic views of a backlight module according to different embodiments of the present invention.

FIG. 12 is a schematic diagram of a display device according to an embodiment of the present invention.

Various embodiments will be described hereinafter, and the spirit and principles of the present invention should be readily understood by those of ordinary skill in the art. However, the specific embodiments are to be considered as illustrative and not restrictive or limiting. Therefore, for the technical field of the art Generally speaking, the knowledge changes and modifications of this creation should be obvious and easily achieved without departing from the spirit and principles of this creation.

In the figures, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Throughout the specification, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, a film, a region or a substrate is referred to as being "on" or "connected" to another element, it can be Intermediate components can also be present. In contrast, when an element is referred to as "directly on the other element" or "directly connected" to another element, there is no intermediate element. As used herein, "connected" may refer to both physical and/or electrical connections. Furthermore, "electrical connection" or "coupling" may be the presence of other components between two components.

It will be understood that the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or portions, but such elements, components, regions, and/or Or part of it should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, Therefore, the "first component", "first component", "first region", "first layer" or "first portion" discussed below may be referred to as a second component, component, region, layer or portion. Leaving the teachings of this article.

The terminology used herein is for the purpose of describing particular embodiments, As used herein, the singular forms "", "," "or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It is also to be understood that the terms "comprise" and / or "include", when used in this specification, are intended to mean the presence or addition of the features, regions, integers, steps, operations, components and/or components. The presence or addition of one or more other features, regions, integers, steps, operations, components, components and/or combinations thereof are not excluded.

Exemplary embodiments are described herein with reference to cross-section illustrations that are a schematic representation of an idealized embodiment. Thus, variations in the shapes of the illustrations as a result of, for example, manufacturing techniques and/or tolerances are contemplated. Thus, the embodiments described herein are not to be construed as limited to the particular shapes of the regions as illustrated herein. For example, regions shown or described as flat may generally have rough and/or non-linear features. Furthermore, the acute angles shown may be round. Accordingly, the regions illustrated in the figures are illustrative in nature and their shapes are not intended to illustrate the precise shapes of the regions and are not intended to limit the scope of the application.

The present invention provides a backlight module and a display device, which can effectively position an optical film by a light source unit, thereby improving the design of a narrow frame or a frameless design of the display device. Hereinafter, details of the backlight module and the display device of the present embodiment will be described in detail with reference to the drawings.

1A and 1B are exploded and assembled schematic views of an embodiment of a backlight module 10. As shown in FIG. 1A and FIG. 1B, the backlight module 10 of the present invention includes a light source unit 100, a positioning member (for example, a protruding portion 210), and an optical film 300. The light source unit 100 includes a carrier 110 and a plurality of light sources 120. Carrier plate 110 has opposing bearing faces 112 and back faces 114. The plurality of light sources 120 are disposed on the bearing surface 112 of the carrier 110. The positioning member is disposed on the carrier 110. The optical film 300 has a positioning portion 310 and is disposed on one side of the carrier 110, and the positioning portion 310 is positioned at the positioning member to restrict the movement of the optical film 300 relative to the carrier 110.

In one embodiment, the carrier 110 is preferably a circuit board on which the plurality of light sources 120 are mounted and electrically connected, and has a light source circuit that drives the plurality of light sources 120. The carrier plate 110 is preferably elongated, and the bearing surface 112 and the back surface 114 are extended between the top portion 111 and the bottom portion 113 along the length direction L1 thereof. Stretch the sides of the surface. The carrier surface 112 preferably has a plurality of electrical contacts for the light source circuit for electrical connection with the plurality of light sources 120. The plurality of light sources 120 are preferably disposed on the carrier 110 at intervals in the longitudinal direction L1. In one embodiment, the plurality of light sources 120 are preferably light emitting diodes and can be fixed to the carrier 110 and electrically connected to electrical contacts of the light source circuit by techniques such as surface mount (SMT) or soldering. Furthermore, the connector 130 can be disposed at a convenient location on the carrier 110 as an electrical connection component of the light source unit 100 with other components.

In this embodiment, the positioning member is preferably a protrusion 210 integrally formed with the carrier plate 110 and protruding from the carrier plate 110. In particular, the protrusion 210 may have a cylindrical, plate or block shape that extends upward from the top portion 111 of the carrier plate 110 and is integrally formed with the carrier plate 110. For example, one or more protrusions 210 may be formed on the top portion 111 of the carrier 110 as a positioning member by processing the carrier 110 according to the size of the optical film 300 and the design of the positioning mechanism. In one embodiment, the protruding portion 210 preferably extends the bearing surface 112 upwardly from the top portion 111 of the carrier plate 110. The protruding portion 210 is preferably substantially coplanar with the bearing surface 112, but is not limited thereto. Depending on the application, the projection 210 can extend upwardly from any suitable location of the top portion 111 of the carrier plate 110. In this embodiment, the backlight module 10 preferably includes a plurality of positioning members (such as but not limited to three protruding portions 210), and a plurality of positioning members are spaced apart along the length direction L1 of the carrier 110. One of the plurality of positioning members is disposed in the central portion 110a of the carrier 110, and the remaining positioning members of the plurality of positioning members are symmetrically disposed on the side regions 110b of the central portion 110a with respect to the positioning members disposed on the central portion 110a. Specifically, when the positioning members are an odd number, one of the positioning members is preferably disposed in the central portion 110a of the carrier 110 to substantially correspond to the position of the center line of the positioning portion 310 of the optical film 300, and the remaining positioning. The components are symmetrically disposed on the two side regions 110b, respectively, centering on the positioning members of the central portion 110a, but are not limited thereto. In other embodiments, the backlight module may include an even number of positioning members, and the even number of positioning members are preferably symmetrically disposed along the length direction L1 of the carrier 110. Set.

In one embodiment, as shown in the side view of FIG. 2, in the normal direction L3 of the parallel bearing surface 112, the thickness T1 of the protruding portion 210 is preferably smaller than the distance between the bearing surface 112 and the back surface 114 (ie, the carrier 110). The thickness T2) in the normal direction L3 of the bearing surface 112 causes the carrier plate 110 to form a supporting surface at the top portion 111 to support the positioning portion 310 of the optical film 300, thereby enhancing the stability of positioning. Specifically, the protrusion 210 may partially extend upward from the top portion 111 of the carrier 110 such that the carrier 110 abuts the top surface of the bottom end of the protrusion 210 as a support surface. In other words, the support surface is at least partially located between the protrusion 210 and the back surface 114 to support the positioning portion 310 adjacent the back surface 114.

The optical film 300 is preferably a single film or a combination of a plurality of films for enhancing optical performance such as a diffusion plate, a brightness enhancement film, a light-splitting film, etc., and the size of the optical film 300 can be matched with the application of the backlight module 10. . The optical film 300 is disposed substantially on one side of the carrier 110, for example, adjacent to the side of the carrying surface 112, and the normal direction L2 of the optical film 300 intersects with the normal direction L3 of the carrying surface 112, for example, substantially perpendicularly intersects. In this embodiment, the optical film 300 can have one or more positioning portions 310, and the number of positioning portions 310 preferably corresponds to the number (eg, three) of the positioning members (eg, the protrusions 210). For example, the positioning portion 310 can be a tongue including the positioning hole 312, and the tongue corresponding positioning member (for example, the protruding portion 210) protrudes from the side of the optical film 300 adjacent to the carrier 110 toward the carrier 110, so that the optical film The sheet 300 is provided with a side edge in which the side of the positioning portion 310 has an uneven shape. In other words, corresponding to the arrangement of the positioning members, the side of the optical film 300 parallel to the longitudinal direction L1 of the carrier plate 110 may have a concave-convex structure, and the relatively protruding convex portion may be a tongue portion as the positioning portion 310. In this embodiment, the positioning hole 312 of the positioning portion 310 is configured to form a positioning mechanism with the positioning member (for example, the protruding portion 210). Specifically, the shape and size of the positioning hole 312 correspond to the protrusion 210, so that the positioning hole 312 can be sleeved on the protrusion 210 to limit the movement of the optical film 300 relative to the carrier 110, thereby achieving the optical film 300. Positioning.

It should be noted that the length of the protruding portion 210 extending upward from the top portion 111 of the carrier plate 110 is designed according to the thickness of the optical film 300, so that the optical film 300 is sleeved on the protruding portion 210 by the positioning hole 312 and is not easily self-protruding. 210 out. For example, after the optical film 300 is sleeved on the protruding portion 210 by the positioning hole 312, the protruding portion 210 can protrude from the surface of the optical film 300 (or the positioning portion 310) for a distance, that is, the protruding portion 210 is longer than a length. The distance (or length) is preferably greater than, for example, 0.7 mm, but is not limited thereto. In other embodiments, the distance (or length) may be less than or equal to 0.7 mm depending on the actual application or shape of the protrusion.

Furthermore, as shown in FIGS. 3A and 3B, in other embodiments, the width of the protrusion 210' or 210" away from the carrier 110 is preferably greater than the width of the protrusion 210' or 210" adjacent to the carrier 110. That is, the protruding portion 210' or 210" as the positioning member preferably has an upper width and a lower narrow shape to enhance the positioning of the positioning portion 310. Specifically, in the longitudinal direction L1 of the carrier 110, the protruding portion 210' The bottom width of the (or 210") connection carrier 110 is preferably smaller than the top width of the protrusion 210' (or 210") away from the top 111 of the carrier 110. For example, the protrusion 210' may have a "T" shape. The shape, or protrusion 210" may have a trapezoidal shape. When the positioning hole 312 is sleeved down into the narrow bottom from the wide top of the protrusion 210' (or 210"), the positioning hole 312 and the protrusion 210' (or 210" There may be a margin of thermal expansion between the narrow bottoms and it is not easy to detach from the wide top of the protrusion 210' (or 210"). For example, when the positioning hole 312 is sleeved on the protruding portion 210, the gap between the positioning hole 312 and the protruding portion 210 is preferably about 0.05 mm to 0.1 mm to provide a margin for thermal expansion of the optical film 300, but not Limited. In other embodiments, the gap between the locating hole 312 and the protrusion 210 may vary depending on the material properties of the optical film 300.

In addition, the carrier 110 may have a recess 115 for positioning an underlying optical film (not shown) such as a reflective sheet, a light guide, or the like. The groove 115 preferably corresponds to the protrusion 210 (or 210', 210") Formed on the opposite side of the carrier 110. Specifically, the protrusion 210 protrudes from the top portion 111 of the carrier 110, and the groove 115 is formed at the bottom 113 of the carrier 110, and preferably communicates with the bearing surface 112 and the back surface 114. The depth at which the recess 115 is recessed from the bottom 113 is preferably designed according to the thickness of the optical film. For example, the lower optical diaphragm can have a similar tongue, and the recess 115 forms a passage for the carrier 110 and allows the tongue to extend from the bearing surface 112 into the recess 115 to limit the tongue by the sidewall of the recess. The lateral displacement, which in turn limits the movement of the lower optical diaphragm relative to the carrier plate 110, achieves a positioning effect. In this embodiment, the position of the groove 115 and the positioning portion 210 can be aligned in a straight line, but not limited thereto. Depending on the application, the grooves 115 may be staggered with the positioning portion 210, or the carrier plate 110 may not be provided with the grooves 115.

In the above embodiment, the positioning member is a protrusion 210 (or 210', 210") integrally formed with the carrier 110. However, in other embodiments, the positioning member may be engaged, bonded, or locked. The fixing means is attached to the independent components of the carrier to simplify the processing procedure of the carrier and improve the flexibility of the positioning of the positioning member. The emphasis on the difference between the positioning member and the carrier is emphasized later, and the details of the optical film can be referred to the foregoing embodiment. Related instructions.

4A to 4C are schematic views of another embodiment of the creation. As shown in FIGS. 4A-4C , the positioning member 400 includes a body portion 410 and a protruding portion 420 . The body portion 410 connects the protruding portion 420 and is disposed on the carrier 110 , and the protruding portion 420 protrudes from the carrier 110 . In this embodiment, the positioning member 400 further includes an extension portion 430 , and the body portion 410 connects the extension portion 430 and the protrusion portion 420 . Specifically, the protruding portion 420 and the extending portion 430 are respectively connected to opposite ends of the body portion 410, so that when the body portion 410 is disposed on the carrier 110 by, for example, snapping, bonding, or locking, the protruding portion 420 The front portion 111 is protruded away from the direction of the carrier 110, and the extending portion 430 extends horizontally in a direction approaching the carrier 110. In this embodiment, the body portion 410 is preferably disposed on the back surface 114 of the carrier 110, and the extending portion 430 extends in the direction of the bearing surface 112 in the recess 115 such that the body portion 410 and the extending portion 430 constitute The shape of the "n" shape can be sandwiched between the carrier plates 110, which increases assembly convenience. Moreover, when the positioning component 400 is disposed on the back surface 114 of the carrier 110, the positioning component 400 preferably includes a heat conductive material to enhance heat dissipation of the light source unit 100. For example, the positioning member 400 can be bent from a metal piece (for example, a copper piece, an aluminum piece, an iron piece, etc.), and the thickness of the positioning piece 400 is preferably smaller than the thickness of the carrier plate 110, so that the top portion 111 of the carrier plate 110 can be As a supporting surface, a portion of the positioning portion 310 of the optical film 300 behind the protruding portion 410 is supported. In this embodiment, the position and number of the positioning members 400 can be adjusted according to actual applications, and the setting elasticity of the positioning members can be improved.

5A to 5C are schematic views of another embodiment of the creation. As shown in FIG. 5A to FIG. 5C , the carrier 110 further has a receiving groove 116 , and the receiving groove 116 is preferably disposed on the back surface 114 of the carrier 110 . The positioning member 500 includes a body portion 510, a protruding portion 520, and an extending portion 530. The positioning member 500 has a structure similar to that of the positioning member 400. The difference is that the shape and size of the body portion 510 correspond to the receiving groove 116, so that the body portion 510 can be disposed in the receiving groove 116 of the carrier 110, and preferably the carrier plate. The back side 114 of 110 is substantially coplanar. In other words, the depth of the receiving groove 116 preferably corresponds to the thickness of the body portion 510. When the positioning member 500 is sandwiched between the carrier portion 510 and the extending portion 530, the body portion 510 is embedded in the receiving groove 116 and protrudes. The 520 protrudes from the top 111 of the carrier 110. Thereby, even if the positioning member 500 is disposed on the carrier 110, the back surface 114 of the carrier 110 has a substantially planar surface to promote substantially complete surface contact with other heat dissipating members to enhance the heat dissipation effect.

6A and 6B are schematic views of another variation of the creation of the present invention. As shown in FIG. 6A and FIG. 6B , the positioning member 600 is different from the positioning member 500 in that the positioning member 600 has a more restricting portion 640 . The limiting portion 640 extends from the end of the protruding portion 620 away from the one end of the carrier 110 toward the back surface 114 to define an accommodation space S between the limiting portion 640 and the carrier 110. Specifically, the limiting portion 640 and the body portion 610 are connected to opposite ends of the protruding portion 620 , and the limiting portion 640 is preferably parallel to the normal side of the bearing surface 112 . The L3 extends toward the back surface 114, so that the accommodating space S for accommodating the positioning portion 310 of the optical film 300 is formed under the limiting portion 640, whereby the displacement of the optical film 300 with respect to the extending direction of the protruding portion 610 can be restricted, which is effective. The optical film 300 is prevented from coming off. It should be noted that the details of the body portion 610, the protruding portion 620 and the extending portion 630 of the positioning member 600 can be referred to the foregoing embodiments, and details are not described herein again.

7A and 7B are schematic views of other modified embodiments of the present invention. As shown in FIGS. 7A and 7B, the positioning members 700 and 700' have a structure similar to the positioning member 600, with the difference that the positioning members 700 and 700' do not have an extension portion, and the positioning member 700 is embedded in the carrier plate 110 and the back surface 114 substantially. The coplanar surface, and the positioning member 700' is disposed on the back surface 114 of the carrier 110 to form a concave-convex surface.

8A to 8C are schematic views of another embodiment of the present invention, wherein FIGS. 8A and 8B are a front view and a side view of the carrier 110 and the positioning member 800, and FIG. 8C is a schematic view of the positioning member 800. As shown in FIG. 8A to FIG. 8C , the positioning member 800 is preferably disposed on the bearing surface 112 of the carrier 110 , and the positioning member 800 includes a body portion 810 and a protruding portion 820 . The body portion 810 connects the protruding portion 820 and is disposed on the bearing surface 112 of the carrier 110 such that the protruding portion 820 protrudes from the top portion 111 of the carrier 110. Specifically, the positioning member 800 is preferably a plate member made of a non-conductive material and has a retracted region 830, such as an "I" shaped polymer plate. When the positioning member 800 is disposed on the bearing surface 112, one of the plurality of light sources 120 is disposed adjacent to the body portion 810 and extends into the indented region 830. In other words, the positioning member 800 can be disposed between the light sources 120, and the design of the indentation region 830 is such that the setting of the light source 120 is substantially unaffected.

Figure 9 is a schematic illustration of one variation of the present invention. As shown in FIG. 9 , the positioning member 900 has a structure similar to the positioning member 800 , and further includes an extending portion 930 and a limiting portion 940 . Specifically, the body portion 910 of the positioning member 900 is connected to the extending portion 930 and the protruding portion 920 , and the limiting portion 940 is connected to the end of the protruding portion 920 . When the positioning member 900 is disposed on the carrier 110, the body portion 910 is disposed on the carrier The protrusion 112 protrudes from the top portion 111 of the carrier 110, and the extension portion 930 extends in the groove 115 toward the back surface 114, and the limiting portion 940 is away from the protrusion 920 away from the one end of the carrier 110 toward the back surface 114. Extending to define an accommodation space S between the limiting portion 940 and the top portion 111 of the carrier 110.

It should be noted that, according to practical applications, the body portion of the positioning member may be disposed on one of the bearing surface 112 and the back surface 114, and the extending portion preferably extends toward the other of the bearing surface 112 and the back surface 114. For example, in the embodiment of FIGS. 4B, 5B, and 6B, the body portions 410, 510, 610 are disposed on the back surface 114 of the carrier 110, and the extensions 430, 530, 630 preferably extend toward the groove in the direction of the bearing surface 112. 115. In the embodiment of FIG. 9B, the body portions 410, 510, 610 are disposed on the bearing surface 112 of the carrier 110, and the extensions 430, 530, 630 preferably extend into the recess 115 in the direction of the back surface 114.

In the foregoing embodiment, the positioning portion 310 of the optical film 300 is a tongue portion including the positioning hole 312, but is not limited thereto. In the variant embodiment of FIG. 10, the positioning portion may include a positioning hole 312 formed on a side of the optical film 300 adjacent to the bearing surface 112. In other words, the optical film 300 adjacent to the side of the bearing surface 112 may have no concave and convex edges (or the positioning holes 312 are not disposed on the opposite side protruding convex structure), and the positioning hole 312 is a corresponding positioning member (for example, the protruding portion 210) It is conveniently located at the optical film 300.

In addition, in the foregoing embodiment, the optical film 300 and the carrier 110 are sleeved by the positioning holes 312 (for example, 210) as a positioning mechanism, but not limited thereto. In the modified embodiment of FIG. 11 , the plurality of protrusions 210 ′′′ may protrude from the carrier 110 such that the positioning member 200 is a channel (or a groove) formed in the carrier 110 , and the positioning portion 310 is an optical film. The tongue extends from one side of the sheet 300. Specifically, a positioning member 200 in the form of a channel (or groove) is formed between adjacent protrusions 210"", allowing the tongue portion 310 of the optical film 300 to protrude into the positioning member 200 in the form of a channel to limit the optical film. 300 relative Positioning is achieved by the movement of the carrier 110.

FIG. 12 is a schematic diagram of a display device according to an embodiment of the present invention. As shown in FIG. 12, the display device 1 includes a backlight module (for example, 10) and a back sheet 20 in any of the embodiments of FIGS. 1A to 11. It should be noted that, although not shown in the foregoing embodiment, the backlight module 20 may further include other components for enhancing optical performance, such as the light guide plate 140, and the light guide plate 140 is disposed corresponding to the plurality of light sources 120 to emit light from the light source 120. The display panel 30 is guided to the display device. The back plate 20 is disposed on one side of the backlight module, and the back surface 114 of the carrier board 110 and the inner surface 242 of the back board 20 substantially completely fit. In particular, the backing plate 20 is preferably made of a thermally conductive material, such as a metal. The back plate 20 includes a bottom plate 22 and a side wall 24, and the side wall 24 is erected to the bottom plate 22, and the bottom plate 22 is located on the other side (for example, below) of the light guide plate 140 with respect to the display panel 30. The carrier 110 of the backlight module is located on the bottom plate 22 and adjacent to the sidewall 24, that is, the back surface 114 of the carrier 110 faces the inner surface 242 of the sidewall 24, and preferably substantially completely conforms to enhance the heat dissipation effect. For example, when the combination of the carrier board and the positioning member has the structure of FIG. 1B, 5B, 6B, 7A, 8B or 9B, the back surface 114 of the carrier board 110 is substantially planar, and the inner surface 242 of the side wall 24 of the back board 20 can be Corresponding to the plane, the back surface 114 of the carrier 110 substantially conforms substantially to the inner face 242 of the side wall 24. When the combination of the carrier board and the positioning member has the structure as shown in FIG. 4B or 7B, the back surface 114 of the carrier board 110 is a concave-convex surface, and the inner surface 242 of the side wall 24 of the back board 20 preferably corresponds to a convex-concave plane, so that the carrier 110 is The back side 114 is fitted to the inner face 242 of the side wall 24 to enhance the heat dissipation effect.

Moreover, the optical film 300 is located above the bottom plate 210, and the positioning portion 310 preferably extends through the carrier plate 110 to above the side wall 24. Thereby, not only the design flexibility of the positioning portion of the optical film 300 can be increased, but also the positioning portion can be supported by the top of the side wall 24 to increase the positioning stability.

The foregoing description is only some of the preferred embodiments of the present work. It should be noted that the present invention may be subject to various changes and modifications without departing from the spirit and principles of the present invention. Technical field It should be understood by those having ordinary knowledge that this creation is defined by the scope of the appended patent application, and that all possible substitutions, combinations, modifications, and diversions, etc., are not subject to the scope of this creation. The scope defined by the scope of application for patents.

Claims (18)

A backlight module includes: a light source unit, comprising a carrier plate and a plurality of light sources, wherein the carrier plate has an opposite bearing surface and a back surface, the plurality of light sources are disposed on the bearing surface; and a positioning component is disposed on the carrier board And an optical film having a positioning portion disposed on one side of the carrier, and the positioning portion is positioned on the positioning member to limit movement of the optical film relative to the carrier. The backlight module of claim 1, wherein the positioning member is a protrusion integrally formed with the carrier and protruding from the carrier. The backlight module of claim 1, wherein the positioning member comprises a body portion and a protruding portion, the body portion connecting the protruding portion and disposed on the carrier plate, the protruding portion protruding from the carrier. The backlight module of claim 2 or 3, wherein the positioning portion is a tongue portion including a positioning hole, and the positioning hole is sleeved on the protruding portion. The backlight module of claim 4, wherein the thickness of the protrusion is smaller than a distance between the bearing surface and the back surface in a direction parallel to a normal direction of the bearing surface. The backlight module of claim 3, wherein the positioning member further comprises an extending portion, the body portion connecting the extending portion and the protruding portion, the body portion being disposed on one of the carrying surface and the back surface, and the The extension extends in a direction of the other of the bearing surface and the back surface. The backlight module of claim 3 or 6, wherein the positioning member further has a limiting portion extending from the protruding portion away from the one end of the carrier toward the back surface for the limit An accommodation space is defined between the portion and the carrier. The backlight module of claim 3, wherein the carrier has a receiving groove, the receiving groove is disposed on the back surface; the body portion is disposed in the receiving groove of the carrier, and the back surface is substantially Coplanar. The backlight module of claim 2, wherein the carrier further has a recess, the recess corresponding to the protrusion The outlet is formed on the opposite side of the carrier. The backlight module of claim 6, wherein the carrier further has a recess, the recess corresponding to the protrusion being formed on the opposite side of the carrier, and the extension extending in the recess. The backlight module of claim 3, wherein the body portion comprises a non-conductive material and is disposed on the bearing surface. The backlight module of claim 3, wherein the body portion comprises a heat conductive material and is disposed on the back surface. The backlight module of claim 3, wherein the body portion is disposed on the bearing surface and has a retracting region, and one of the plurality of light sources is disposed adjacent to the body portion and extends into the retracting region. The backlight module of claim 2, wherein the width of the protrusion away from the carrier is greater than the width of the protrusion adjacent to the carrier. The backlight module of claim 1, wherein the positioning member is a channel formed on the carrier, the positioning portion is a tongue extending from a side of the optical film, and the tongue extends into the channel . The backlight module of claim 1, wherein the backlight module comprises a plurality of the positioning members, the plurality of positioning members are spaced apart along a length direction of the carrier, and one of the plurality of positioning members is disposed on the carrier A central portion of the plate, and the remaining positioning members of the plurality of positioning members are symmetrically disposed on both side regions of the central portion with respect to the positioning member disposed in the central portion. A display device, comprising: the backlight module according to any one of claims 1 to 16, and a back plate disposed on one side of the backlight module, and the back side of the carrier board and one of the back boards The inner surface is completely conformable. The display device of claim 17, wherein the backplane comprises a bottom plate and a side wall, the side wall is erected to the bottom plate, the optical film is located above the bottom plate, and the positioning portion extends through the carrier plate to the side wall Above.