TWI579619B - Backlight module - Google Patents

Description

Backlight module

The present invention relates to an optical module, and more particularly to a backlight module.

As the semiconductor industry and related electronics industries are increasingly developed, digital display devices such as smart phones, notebooks, tablet PCs, and flat-panel TVs are all more convenient, versatile, and beautiful. The direction of development. In the use of these products, the display screen is an indispensable interface, among which liquid crystal display (LCD) has become the mainstream of the display screen.

Since the liquid crystal panel of the liquid crystal display device itself does not emit light, a backlight module must be disposed under the liquid crystal panel to provide light required for displaying the screen. In the case of a direct type backlight module, a diffuser plate and an optical film are generally disposed on the back plate to mix light emitted by the light source, wherein the diffuser plate serves as an optical film. However, the provision of the diffusion plate increases the manufacturing cost and assembly process of the backlight module, and omitting the diffusion plate causes the optical film to be bent and deformed due to lack of supporting force.

The "previous technology" paragraph is only used to help understand the content of the present invention, so The disclosure of the "prior art" section may contain some conventional techniques that are not known to those of ordinary skill in the art. The matters disclosed in the "Prior Art" section, which do not represent the subject matter or the problems to be solved by one or more embodiments of the present invention, are known or recognized by those of ordinary skill in the art prior to the present application.

The invention provides a backlight module, which does not need to be provided with a diffusion plate and can avoid bending deformation of the optical film.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

An embodiment of the present invention provides a backlight module including a backing plate, an optical film, at least one light source, and at least one clamping assembly for achieving one or a portion or all of the above or other purposes. The optical film is disposed on the back plate. The light source is disposed between the back plate and the optical film. The clamping assembly includes a clamping structure and an elastic member. The clamping structure is disposed on the backboard, wherein one end of the optical film is sandwiched by the clamping structure. The elastic member is disposed between the clamping structure and the back plate.

In an embodiment of the invention, the optical film has a light-emitting surface, and the elastic member is compressed between the clamping structure and the back plate in a direction parallel to the light-emitting surface, so that the clamping structure is parallel to the light-emitting surface. The direction is applied to the optical film.

In an embodiment of the invention, the clamping structure comprises two clamping portions, and the two clamping portions respectively contact the opposite surfaces of the end portion to clamp the end portion, and the elastic member is Compressed between one of the two clamping portions and the backing plate.

In an embodiment of the invention, the back plate has a bearing portion and a stopping portion. The bearing portion carries the clamping structure and the elastic member. The stopping portion is connected to the bearing portion, and the elastic member is compressed to the stopping portion. Between the clamping structures.

In an embodiment of the invention, the number of the at least one clamping component is two, and the opposite ends of the optical film are respectively sandwiched by the two clamping structures of the two clamping components.

In an embodiment of the invention, the clamping assembly further includes a lock attachment that locks the clamping structure to the backing plate.

In an embodiment of the invention, the back plate has an opening, and the lock attachment passes through the opening to lock the clamping structure, and the aperture of the opening is larger than the outer diameter of the locking accessory.

In an embodiment of the invention, the optical film has a light-emitting surface, and the lock attachment locks the clamping structure to the back plate in a direction perpendicular to the light-emitting surface.

In an embodiment of the invention, the clamping structure comprises two clamping portions, the clamping portions respectively contacting the opposite surfaces of the end portions and clamping the end portions, each clamping portion having a locking hole and a locking attachment Two locking holes are attached to the two clamping portions.

In an embodiment of the invention, when the lock attachment is not locked to the two clamping portions, the distance between the two clamping portions is greater than the thickness of the optical film, when the lock attachment is locked to the two clamping portions, two The distance between the grips is reduced by the lock attachment to cause the gripping structure to grip the ends.

In an embodiment of the invention, the backlight module includes a plastic frame, wherein the plastic frame surrounds the optical film, and the clamping structure is integrally formed and connected to the plastic frame.

Based on the above, embodiments of the present invention have at least one of the following advantages or effects. The backlight module of the present invention uses the clamping structure to clamp the end of the optical film, and utilizes the elastic force of the elastic member to apply a tensile force to the optical film to thereby stretch the optical film to a flattening force. The state is not bent and deformed, so that an additional diffusion plate is not required to support the optical film, thereby saving the manufacturing cost and assembly process of the backlight module.

The above described features and advantages of the invention will be apparent from the following description.

50‧‧‧ display panel

100, 200‧‧‧ backlight module

110, 210‧‧‧ Backplane

112, 212‧‧‧ bottom plate

114, 214‧‧‧ side panels

114a, 214a‧‧‧ Bearer

114b, 214b‧‧‧ stop

114c, 214c‧‧‧ openings

120, 220‧‧‧ optical diaphragm

120a, 220a‧‧‧ end

122, 222‧‧‧ shine surface

130, 230‧‧‧ light source

140, 240‧‧‧Clamping components

142, 242‧‧‧ clamping structure

142a, 142b, 242a, 242b‧‧‧ gripping section

144, 244‧‧‧ elastic parts

146, 246‧‧‧ lock accessories

150, 250‧‧‧ plastic frame

D1, D2‧‧‧ direction

D1‧‧‧ aperture

D2‧‧‧ outside diameter

H, H’‧‧‧Lock hole

1 is a schematic view of a backlight module in accordance with an embodiment of the present invention.

Figure 2 is a partial perspective view of the clamping structure and optical film of Figure 1.

FIG. 3 illustrates the lock attachment of FIG. 1 not being locked to the clamping structure.

4 is a schematic diagram of a backlight module according to another embodiment of the present invention.

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 schematic view of a backlight module in accordance with an embodiment of the present invention. Figure 2 is a partial perspective view of the clamping structure and optical film of Figure 1. Referring to FIG. 1 and FIG. 2 , the backlight module 100 of the present embodiment includes a back plate 110 , an optical film 120 , a plurality of light sources 130 , and two clamping assemblies 140 . The back plate 110 includes a bottom plate 112 and a plurality of side plates 114 connected to the bottom plate 112. The optical film 120 is disposed on the back plate 110. Each light source 130 is, for example, a light emitting diode (LED) light source and is disposed on the bottom plate 112 of the back plate 110 between the back plate 110 and the optical film 120.

Each clamping assembly 140 includes a clamping structure 142 and an elastic member 144. Each of the clamping structures 142 is disposed on the side plate 114 of the back plate 110, and the opposite end portions 120a of the optical film 120 are respectively sandwiched by the clamping structure 142. Each of the elastic members 144 is, for example, an elastic strip and disposed between the clamping structure 142 and the side plate 114 of the backing plate 110. Alternatively, the elastic rubber strip may be compressed between the clamping structure 142 and the side plate 114 of the backing plate 110. The clamping structure 142 applies a tensile force to the optical film 120 in opposite directions by the elastic force provided by the two elastic members 144, respectively.

In the above configuration, the backlight module 100 uses the clamping structure 142 to clamp the end portion 120a of the optical film 120, and utilizes the elastic force of the elastic member 144 to apply the tensile force to the optical film 120 to Thereby, the optical film 120 is stretched into a flat state without bending deformation, so that the diffusion plate is not required to support the optical film 120, thereby saving the manufacturing cost and assembly process of the backlight module 100. In addition, the optical film 120 of the present embodiment is, for example, a film containing a composite material and has the effect of diffusing light to replace the function of the diffusion plate of the conventional backlight module. In other embodiments, the number of optical films may be multiple and include a diffusion sheet therein. The invention is not limited thereto.

In this embodiment, each of the clamping structures 142 includes two clamping portions 142a, 142b. The two clamping portions 142a, 142b respectively contact the opposite surfaces of the end portions 120a of the optical film 120 to clamp the end portions 120a. The member 144 is compressed between the clamping portion 142a and the side plate 114 of the backing plate 110 as shown in FIG. In detail, each side plate 114 of the back plate 110 has a bearing portion 114a and a stopping portion 114b connected to the carrying portion 114a. The carrying portion 114a carries the clamping structure 142 and the elastic member 144, and the elastic members 144 are compressed. The blocking portion 114b is interposed between the blocking portion 142a of the clamping structure 142. In this embodiment, the stopping portion 114b is connected to the bearing portion 114a, for example, in a bent manner. However, the present invention is not limited thereto, and the stopping portion can be formed on the bearing portion by other suitable means instead of bending. The folding method is formed.

Referring to FIG. 1 , the optical film 120 has a light-emitting surface 122 . The elastic members 144 are compressed between the corresponding clamping structure 142 and the side plate 114 of the back plate 110 , for example, in a direction D1 parallel to the light-emitting surface 122 . The clamping structure 142 is applied to the optical film 120 in a direction D1 parallel to the light exit surface 122. Accordingly, the optical film 120 can be surely maintained in a flat, unbent state by the tensile force applied by the clamping structures 142.

Each of the clamping assemblies 140 of the present embodiment further includes a lock attachment 146 for locking the clamping structure 142 to the carrying portion 114a of the backing plate 110 in a direction D2 perpendicular to the light exiting surface 122. Specifically, the carrying portion 114a of the back plate 110 has an opening 114c. Each of the clamping portions 142a, 142b has a locking hole H. The locking attachment 146 passes through the opening 114c and is locked to the two clamping portions 142a. The two locks of the 142b are attached to the hole H to provide a locking force, so that the clip The holding structure 142 applies a clamping force to the optical film 120 by the locking force. In the present embodiment, the aperture d1 of the opening 114c is larger than the outer diameter d2 of the lock attachment 146 to provide a space for the lock attachment 146 and the clamping structure to move in the direction D1, so that the clamping structure 142 locked by the lock attachment 146 can The displacement is correspondingly generated by the elastic deformability of the elastic member 144 to surely apply a tensile force to the optical film 120 in the direction D1.

FIG. 3 illustrates the lock attachment of FIG. 1 not being locked to the clamping structure. In the present embodiment, when the lock attachment 146 is not locked to the two clamping portions 142a, 142b, the distance between the two clamping portions 142a, 142b is greater than the thickness of the optical film 120 as shown in FIG. The end 120a of the diaphragm 120 can smoothly extend into the clamping structure 142. When the lock attachment 146 is locked to the two clamping portions 142a, 142b as shown in FIG. 1, the distance between the two clamping portions 142a, 142b is reduced by the locking force to cause the clamping structure 142 to clamp the optical film. End 120a of 120.

Referring to FIG. 1 , the backlight module 100 of the present embodiment further includes a plastic frame 150 . The plastic frame 150 is assembled on the back plate 110 to surround the optical film 120 and is used to carry the display panel 50 . In the present embodiment, the plastic frame 150 and the clamping structure 142 are, for example, separate members from each other, but the invention is not limited thereto, and the following is exemplified by the drawings.

4 is a schematic diagram of a backlight module according to another embodiment of the present invention. In the backlight module 200 of FIG. 4, the back plate 210, the bottom plate 212, the side plate 214, the bearing portion 214a, the stopping portion 214b, the opening 214c, the optical film 220, the end portion 220a, the light emitting surface 222, the light source 230, and the clip Configuration and mode of action of holding assembly 240, clamping structure 242, clamping portion 242a, clamping portion 242b, locking hole H', elastic member 244, lock attachment 246, and plastic frame 250 The back plate 110, the bottom plate 112, the side plate 114, the bearing portion 114a, the stopper portion 114b, the opening 114c, the optical film 120, the end portion 120a, the light-emitting surface 122, the light source 130, the clamping assembly 140, and the clamping The arrangement and function of the structure 142, the clamping portion 142a, the clamping portion 142b, the locking hole H, the elastic member 144, the lock attachment 146, and the plastic frame 150 are not described herein. The difference between the backlight module 200 and the backlight module 100 is that the clamping structure 242 is integrally formed in the plastic frame 250 to further simplify the components of the backlight module 200.

In summary, embodiments of the present invention have at least one of the following advantages or benefits. The backlight module of the present invention uses the clamping structure to clamp the end of the optical film, and utilizes the elastic force of the elastic member to apply a tensile force to the optical film to thereby stretch the optical film to a flattening force. The state is not bent and deformed, so that an additional diffusion plate is not required to support the optical film, thereby saving the manufacturing cost and assembly process of the backlight module. In addition, the aperture of the opening of the backboard can be designed to be larger than the outer diameter of the lock attachment to provide a space for the lock attachment to move, so that the clamp structure locked by the lock attachment can be elastically deformed by the elastic member. A displacement is generated to positively apply a pulling force to the optical film.

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.

50‧‧‧ display panel

100‧‧‧Backlight module

110‧‧‧ Backboard

112‧‧‧floor

114‧‧‧ side panels

114a‧‧‧Loading Department

114b‧‧‧stop

114c‧‧‧Opening

120‧‧‧Optical diaphragm

120a‧‧‧End

122‧‧‧Glossy surface

130‧‧‧Light source

140‧‧‧Clamping components

142‧‧‧Clamping structure

142a, 142b‧‧‧ gripping section

144‧‧‧Flexible parts

146‧‧‧Lock attachment

150‧‧‧ plastic frame

D1, D2‧‧‧ direction

D1‧‧‧ aperture

D2‧‧‧ outside diameter

H‧‧‧Lock hole

Claims (11)

A backlight module includes: a back plate; an optical film disposed on the back plate; at least one light source disposed between the back plate and the optical film; and at least two clamping components, wherein each The clamping assembly includes: a clamping structure disposed on the backing plate, wherein one end of the optical film is sandwiched between the clamping structure; and an elastic member disposed on the clamping structure and the backing plate between. The backlight module of claim 1, wherein the optical film has a light-emitting surface, and the elastic member is compressed between the clamping structure and the back plate in a direction parallel to the light-emitting surface, The clamping structure is applied to the optical film in a direction parallel to the light exiting surface. The backlight module of claim 1, wherein the clamping structure comprises two clamping portions, the two clamping portions respectively contacting the opposite surfaces of the end portion to clamp the end portion, and the elastic member is Compressed between one of the two clamping portions and the backing plate. The backlight module of claim 1, wherein the back plate has a bearing portion and a stopping portion, the bearing portion carries the clamping structure and the elastic member, and the stopping portion is connected to the bearing portion. The resilient member is compressed between the stop and the clamping structure. The backlight module of claim 1, wherein the number of the at least two clamping assemblies is two, and the opposite ends of the optical film are respectively sandwiched between the two clamping members. structure. The backlight module of claim 1, wherein the clamping assembly further comprises a lock attachment that locks the clamping structure to the back plate and the clamping structure clamps the optical film . The backlight module of claim 6, wherein the back plate has an opening, and the lock attachment passes through the opening to lock the clamping structure, and the opening has a larger aperture than the lock attachment path. The backlight module of claim 6, wherein the optical film has a light emitting surface, and the lock attachment locks the clamping structure to the back plate in a direction perpendicular to the light emitting surface. The backlight module of claim 6, wherein the clamping structure comprises two clamping portions, the two clamping portions respectively contacting opposite ends of the end portion to clamp the end portion, each of the clamping portions The portion has a locking hole, and the locking attachment is locked to the two locking holes of the two clamping portions. The backlight module of claim 9, wherein when the lock attachment is not locked to the two clamping portions, the distance between the two clamping portions is greater than the thickness of the optical film when the lock When the attachment is attached to the two clamping portions, the distance between the two clamping portions is reduced to cause the clamping structure to clamp the end portion. The backlight module of claim 1, comprising a plastic frame, wherein the plastic frame surrounds the optical film, and the clamping structure is integrally formed and connected to the plastic frame.