TW202008049A - Backlight module and display device - Google Patents

Abstract

A backlight module and a display device include a back frame, a limiting base, a retaining wall, and an optical film set. The back frame has a bottom cover and a side wall surrounded the bottom cover to form a space. The limit base includes a base plate and at least one baffle. The bottom plate is disposed on the bottom cover and has at least one first guiding groove. The baffle stands on the upper surface of the base plate. The retaining wall includes a plate body and at least one first positioning pillar. The plate body stands on the upper surface of the base plate and the first positioning pillar penetrates in the first guiding groove. The optical film set is located in the space and includes a first optical film and a second optical film. The first optical film has a recess and the plate body is in the recess. The second optical film has a limiting hole and the baffle is inserted into the limiting hole. The first positioning pillar is displaceably positioned in the first guiding groove to limit the position of the first optical film in the space through the plate body.

Description

Backlight module and display device

The invention relates to a display technology, especially a backlight module and a display device.

The current design trend of the display device has evolved from the previous bulky, heavy appearance to thin and light weight, and the width of the frame of the display device gradually tends to a narrow frame design, which makes the overall size of the display device shrink and The area of the display screen that can be seen under the display device of the same size is larger and the visual effect is better.

However, for a conventional display device having a narrow frame, the narrow frame is less likely to cover the edge of the optical film of the backlight module due to the narrower frame. In other words, the display area of the display panel will be closer to the edge of the optical film of the backlight module. Therefore, it is easy to cause the positioning area between the optical film and the backlight module to be easily exposed to the display area of the display screen.

An embodiment of the present invention provides a backlight module, which includes a back frame, a limiting base, a blocking wall, and an optical film set. The back frame has a bottom cover and a side wall, and the side wall surrounds the bottom cover to form a space. The limit base includes a bottom plate and at least one blocking piece. The bottom plate is arranged on the bottom cover, and the blocking piece stands on the upper surface of the bottom plate. The bottom plate has at least one first guiding groove. The retaining wall includes a plate body and at least one first positioning column. The plate body stands on the upper surface of the bottom plate, and the first positioning column is located on the lower surface of the plate body and penetrates the first guide groove. The long axis direction of the plate body is substantially perpendicular to the extending direction of the first guide groove. The optical film group is located in the space and includes a first optical film and a second optical film. The edge of the first optical film adjacent to the blocking wall has a notch, and the plate body is located in the notch. The second optical film is stacked on the first optical film and has a limiting hole, and the baffle is inserted through the limiting hole. Wherein, the first positioning post is movably positioned in the first guiding groove to restrict the position of the first optical film in the space through the plate body.

An embodiment of the present invention provides a display device, which includes a plastic frame, a front frame, a display panel, a back frame, a limiting base, a fastener, a blocking wall, and an optical film set. The plastic frame has a support portion and a first side wall connected to the support portion. The first side wall has a snap hole. The front frame has a cover portion and a second side wall connected to the cover portion. The second side wall is located outside the first side wall, and the covering portion is located above the support portion. The display panel is located between the cover portion and the support portion. The back frame has a bottom cover and a side wall. The side wall surrounds the bottom cover to form a space. The first side wall is located between the side wall and the second side wall, the side wall has an opening, and the opening corresponds to the snap hole. The limit base includes a bottom plate and at least one blocking piece. The bottom plate is arranged on the bottom cover, and the blocking piece stands on the upper surface of the bottom plate. The bottom plate has at least one first guiding groove. The retaining wall includes a plate body and at least one first positioning column. The plate body stands on the upper surface of the bottom plate, and the first positioning column is located on the lower surface of the plate body and penetrates the first guide groove. The long axis direction of the plate body is substantially perpendicular to the extending direction of the first guide groove. The optical film group is located in the space and includes a first optical film and a second optical film. The edge of the first optical film adjacent to the blocking wall has a notch, and the plate body is located in the notch. The second optical film is stacked on the first optical film and has a limiting hole, and the baffle is inserted through the limiting hole. Wherein, the first positioning post is movably positioned in the first guiding groove to restrict the position of the first optical film in the space through the plate body.

In summary, the backlight module and the display device according to the embodiments of the present invention are movably positioned in the first guide groove by the first positioning post to adjust and limit the first optical film through the plate The position in the space; the second optical film can be hung by the stopper passing through the limit hole. In addition, the buckle block is provided with a buckle hole of the plastic frame, so that the plastic frame can be locked to the back frame through the buckle. In this way, the relative position between the limit base and the baffle wall can be changed according to the displacement of the baffle wall, whereby the arrangement of the optical diaphragm group in the space can be adjusted, so that the edge of the optical diaphragm group is not exposed to In the display area, there is no need to produce multiple sets of molds in response to the design of different backlight modules and display devices. Compared with the backlight module and the display device, the embodiments of the present invention can be applied to display devices with different frame widths by adjusting the relative position between the limit base and the barrier wall, thereby reducing the manufacturing cost.

FIG. 1 is a partial schematic perspective view of a backlight module according to an embodiment of the invention. FIG. 2 is a partial schematic perspective view of the backlight module corresponding to FIG. 1. FIG. 3 is an exploded view corresponding to the backlight module of FIG. 1. 4 is an exploded view corresponding to the limit base and the retaining wall of FIG. 1. For convenience of description, the side wall 112 of FIG. 1 is shown with an imaginary line; FIG. 2 omits the second optical film 142 of FIG. 1; FIG. 3 omits the optical film group 140 of FIG. 1, so it can be displayed. The internal structure and configuration of the backlight module 100 are shown. Please refer to FIGS. 1 to 4, the backlight module 100 includes a back frame 110, a limiting base 120, a blocking wall 130 and an optical film set 140. The limiting base 120 is disposed on the back frame 110, and the blocking wall 130 is disposed on the limiting base 120. The optical film group 140 includes at least one optical film (the first optical film 141 and the second optical film 142 are shown in FIG. 1 ), and the at least one optical film is limited to the back frame 110 by the blocking wall 130 Space H.

The back frame 110 has a bottom cover 111 and a side wall 112. The side wall 112 surrounds and connects the edge of the bottom cover 111, so that a space H is formed between the side wall 112 and the bottom cover 111.

The limiting base 120 includes a bottom plate 121 and at least one blocking piece 122. The bottom plate 121 is disposed on the bottom cover 111 of the back frame 110. In an embodiment, the bottom plate 121 is disposed on the bottom cover 111 adjacent to the side wall 112. The bottom plate 121 has at least one first guiding groove G1, and the extending direction of the first guiding groove G1 extends from the space H toward the side wall 112. The blocking piece 122 stands on the upper surface 1221 of the bottom plate 121. In one embodiment, the limiting base 120 includes two baffles 122, and the two baffles 122 are separated by a distance and located at opposite ends of the bottom plate 121, respectively. In addition, it should be noted that the number and position of the baffles 122 are only examples, rather than limiting the embodiments of the present invention.

The blocking wall 130 includes a plate body 131 and at least one first positioning post 132. The plate body 131 is a plate-shaped block. The first positioning post 132 is located on the lower surface 1311 of the plate body 131 and protrudes outward from the lower surface 1311. The plate body 131 stands on the upper surface 1211 of the bottom plate 121 of the limiting base 120. The first positioning post 132 is penetrated in the first guide groove G1, and the first positioning post 132 is movably positioned in the first guide groove G1. The long axis direction of the plate body 131 is substantially perpendicular to the extending direction of the first guide groove G1. Here, the blocking wall 130 is movably (for example, displaceably) disposed on the limiting base 120, and the blocking wall 130 can be displaced according to the extending direction of the first guide groove G1 and can be positioned on the limiting base 120 on. That is, the distance between the blocking wall 130 and the side wall 112 may vary along the first guide groove G1. The number and position of the first positioning posts 132 may depend on the number and position of the first guide grooves G1. In one embodiment, as shown in FIG. 4, the blocking wall 130 includes two first positioning posts 132, and the two first positioning posts 132 respectively correspond to the positions of the two first guide grooves G1. In addition, it should be noted that the numbers and positions of the first positioning posts 132 and the first guide grooves G1 are only examples, rather than limiting the embodiments of the present invention.

The optical diaphragm group 140 is accommodated in this space H. The optical film group 140 includes a first optical film 141 and a second optical film 142. The edge 1411 of the first optical film 141 adjacent to the blocking wall 130 has a notch N, and the notch N corresponds to the plate body 131 of the blocking wall 130. That is, the plate body 131 is located in the recess N. The second optical film 142 is stacked on the first optical film 141. The second optical film 142 has a limiting hole L, and the blocking piece 122 is inserted into the limiting hole L. In this embodiment, the first optical film 141 may be a diffusion plate, and the second optical film 142 may be, but not limited to, an optical film such as a diffusion film, a reflection film, a brightness enhancement sheet, or a reflection type brightness enhancement sheet.

Here, the first positioning post 132 of the blocking wall 130 is movably positioned in the first guide groove G1 to adjust and limit the position of the first optical film 141 in the space H; The blocking piece 122 of the seat 120 is inserted into the limiting hole L, so that the second optical film 142 can be supported by the blocking piece 122 of the limiting base 120. In this way, the relative position between the limit base 120 and the blocking wall 130 can be changed according to the displacement of the blocking wall 130, whereby the arrangement of the optical diaphragm group 140 in the space H can be adjusted without having to deal with different backlights The design of the module 100 to produce multiple sets of molds also reduces manufacturing costs.

5 is a partial schematic perspective view of a backlight module according to another embodiment of the invention. FIG. 6 is a partial perspective view of the backlight module corresponding to FIG. 5. 7 is an exploded view of the backlight module corresponding to FIG. 5. 8 is an exploded view corresponding to the limit base and the retaining wall of FIG. 5. For convenience of description, the side wall 112 of FIG. 5 is shown by an imaginary line; FIG. 6 omits the second optical film 142 of FIG. 5; FIG. 7 omits the optical film group 140 of FIG. 5, so it can be displayed. The internal structure and configuration of the backlight module 200 are shown. Please refer to FIG. 5 to FIG. 8. In some embodiments, the backlight module 200 further includes a buckle 150, and the buckle 150 is movably (eg, displaceably) disposed on the limiting base 120. The fastener 150 includes a body 151 and at least one second positioning post 152. The second positioning post 152 is located on the lower surface 1511 of the body 151 and protrudes outward from the lower surface 1511. The side wall 112 of the back frame 110 has an opening W1 adjacent to the recess N, and the bottom plate 121 of the limiting base 120 further has at least one second guide groove G2. The body 151 is engaged or fitted into the opening W1 of the side wall 112. The second positioning post 152 penetrates the second guide groove G2, and the second positioning post 152 is movably positioned in the second guide groove G2. The extending direction of the second guide groove G2 is parallel to the extending direction of the first guide groove G1. Here, the fastener 150 can be movably displaced toward the blocking wall 130 according to the extending direction of the second guide groove G2 and can be positioned on the limiting base 120. That is to say, the distance between the buckle 150 and the blocking wall 130 may vary along the second guide groove G2.

The number and position of the second positioning posts 152 may depend on the number and position of the second guide grooves G2. In an embodiment, as shown in FIG. 8, the fastener 150 includes a second positioning post 152, and the bottom plate 121 of the limiting base 120 has a first position between two first guiding grooves G1 Two guide grooves G2. The second positioning post 152 corresponds to the position of the second guide groove G2. In addition, it should be noted that the numbers and positions of the second positioning posts 152 and the second guide grooves G2 are only examples, rather than limitations on the embodiments of the present invention.

In some embodiments, as shown in FIGS. 4 and 8, the board 131 has a through hole U. The inner side surface 1512 of the body 151 protrudes toward the space H, and the inner side surface 1512 of the body 151 is movably displaced toward the plate body 131 and passes through the perforation U of the plate body 131. In one embodiment, the inner side surface 1512 of the body 151 protrudes toward the space H to form a long ridge, that is to say, the shape of the body 151 may be similar to an L shape, as shown in FIG. 8. However, in other embodiments, the shape of the body 151 can also take on other suitable shapes depending on the design (not shown).

FIG. 9 is a partially enlarged schematic view corresponding to area A in FIG. 4. In some embodiments, as shown in FIG. 9, the two inner groove surfaces G11 of the first guide groove G1 respectively have a plurality of convex portions T1 and a plurality of concave portions S1, and the convex portions of the same inner groove surface G11 T1 and these concave portions S1 are continuously connected and arranged alternately. In other words, one of the inner groove surfaces G11 faces the other inner groove surface G11 and has a plurality of protrusions to form a plurality of convex portions T1, and any adjacent two of the convex portions T1 are connected The recess S1 is formed at the place. The convex portions T1 located opposite the two inner groove surfaces G11 are oppositely arranged and the concave portions S1 are oppositely arranged. That is to say, each convex portion T1 of one inner groove surface G11 corresponds to each convex portion T1 of the other inner groove surface G11, and each concave portion S1 of one inner groove surface G11 corresponds to its opposite Each recess S1 of the other inner groove surface G11. The first positioning post 132 protrudes outward from the lower surface 1311 of the plate body 131 and penetrates in the first guide groove G1. When the first positioning post 132 is displaced, the surface of the first positioning post 132 abuts against the opposing two convex portions T1 of the two inner groove surfaces G11 and slides along the surface of the opposing two convex portions T1. Here, the amount of displacement of the retaining wall 130 on the limit base 120 (depending on the length of the first guide groove G1) can be determined by the first positioning post 132 sliding relative to the two inner groove surfaces G11. The number of convex portions T1 is adjusted. When the first positioning post 132 is positioned, the first positioning post 132 is located between the opposing two concave portions S1 of the opposing two inner groove surfaces G11. Here, the blocking wall 130 is positioned on the bottom plate 121 of the limiting base 120.

FIG. 10 is a partially enlarged schematic view corresponding to area B in FIG. 8. As shown in FIG. 10, in some embodiments, the two inner groove surfaces G21 of the second guide groove G2 respectively have a plurality of convex portions T2 and a plurality of concave portions S2, and the convex portions of the same inner groove surface G21 T2 is continuously connected with these concave portions S2 and arranged alternately. In other words, one of the inner groove surfaces G21 faces the other inner groove surface G21 and has a plurality of protrusions to form a plurality of convex portions T2, and any adjacent two of the convex portions T2 in these convex portions T2 are connected The recess S2 is formed at the place. The convex portions T2 located opposite the two inner groove surfaces G21 are oppositely arranged and the concave portions S2 are oppositely arranged. That is to say, each convex portion T2 of one inner groove surface G21 corresponds to each convex portion T2 of the other inner groove surface G21, and each concave portion S2 of one inner groove surface G21 corresponds to its opposite Each recess S2 of the other inner groove surface G21. The second positioning post 152 protrudes outward from the lower surface 1511 of the body 151 and penetrates into the second guide groove G2. When the second positioning post 152 is displaced, the surface of the second positioning post 152 abuts against the opposing two convex portions T2 of the opposing two inner groove surfaces G21 and slides along the surface of the opposing two convex portions T2. Here, the amount of displacement of the fastener 150 on the limiting base 120 can be adjusted by the number of the relative two convex portions T2 that the second positioning post 152 slides relative to the two inner groove surfaces G21. When the second positioning post 152 is positioned, the second positioning post 152 is located between the opposing two concave portions S2 of the opposing two inner groove surfaces G21. Here, the fastener 150 is positioned on the bottom plate 121 of the limiting base 120.

Here, by the convex portions (convex portions T1 and convex portions T2) and concave portions (concave portions S1) of the inner groove surfaces (inner groove surface G11 and inner groove surface G21) of the first guide groove G1 and the second guide groove G2 And the concave portion S2) so that the first positioning post 132 and the second positioning post 152 can be displaceably positioned on the inner groove surfaces of the first guide groove G1 and the second guide groove G2.

In addition, the shapes of the convex portion (convex portion T1 and convex portion T2) and the concave portion (concave portion S1 and concave portion S2) may be various. In one embodiment, as shown in FIGS. 9 and 10, the convex portions (convex portion T1 and convex portion T2) and the concave portions (concave portion S1 and concave portion S2) are successively connected and saw-toothed. However, in other embodiments, the convex portions (convex portion T1 and convex portion T2) and concave portions (concave portion S1 and concave portion S2) may also exhibit successively connected pyramidal jagged shapes (not shown in the figure) and quadrangular jagged shapes ( (Not shown) or other suitable shapes (not shown), etc.

In some embodiments, as shown in FIGS. 1, 2, 3, 5 and 6, the side wall 112 of the back frame 110 may further have a slot W2. As shown in FIGS. 1 and 2, the slot W2 extends from the top surface 1121 of the side wall 112 toward the bottom cover 111 and the slotted groove surface W21 is recessed in the top surface 1121 of the side wall 112. As shown in FIGS. 5 and 6, the slot W2 may extend from the top surface 1121 of the side wall 112 toward the bottom cover 111 and further communicate with the opening W1. The edge 1421 of the second optical film 142 has a lug portion E, which is located on the slot W2 and on the groove surface W21. The lug portion E can be attached to the groove surface W21 of the slot W2 according to the design.

In one embodiment, as shown in FIGS. 1, 2, 5 and 6, the width of the slot W2 is substantially equal to or greater than the width of the lug portion E, so that the lug portion E is placed in the open On the groove surface W21 of the groove W2.

In one embodiment, as shown in FIGS. 1, 2, 5 and 6, in the extending direction of the side wall 112 (that is, the direction substantially perpendicular to the bottom cover 111 ), the lug portion E is located on the side wall Between the top surface 1121 of 112 and the groove surface W21 of the groove W2. That is, the top surface of the lug portion E is lower than the top surface 1121 of the side wall 112. However, in other embodiments (not shown), the top surface of the lug portion E may be flush with the top surface 1121 of the side wall 112 depending on the overall thickness of the optical diaphragm 140 or the assembly design of other components. It protrudes from the top surface 1121 of the side wall 112.

In an embodiment, the distribution positions of the limiting base 120, the blocking wall 130, and the buckle 150 can be changed according to design considerations of different backlight modules. In some embodiments, the limit base 120, the blocking wall 130, and the buckle 150 may be distributed on one side of the corresponding backlight module, as depicted in these drawings. However, in other embodiments, the number of the limiting base 120, the blocking wall 130, and the fastener 150 may also be multiple and distributed on different sides of the backlight module, for example, the limiting base 120, The blocking wall 130 and the fastener 150 may be two and distributed on two sides of the backlight module, respectively.

FIG. 11 is a top view of the backlight module corresponding to FIG. 5. Please refer to FIG. 11. In some embodiments, considering that the optical film group 140 may cause assembly tolerance during assembly or expand due to heat, the aperture of the limiting hole L of the second optical film 142 along its long axis direction L1 may be greater than the distribution distance F1 of the two baffles 122 to accommodate assembly tolerance or expansion and contraction.

FIG. 12 is a top view of the backlight module corresponding to FIG. 6. Among them, for convenience of explanation, FIG. 12 omits the second optical film 142 of FIG. 11, so the internal structure and arrangement of the backlight module 200 can be shown. Please refer to FIG. 12. In some embodiments, due to consideration that the optical film group 140 may cause assembly tolerance during assembly or expand due to heat, it may be between the recess N of the first optical film 141 and the plate 131 Leave a gap to accommodate assembly tolerance or expansion and contraction. Here, the width N1 of the recess N of the first optical film 141 may be greater than the width D1 of the plate body 131 along the long axis direction. However, in some other embodiments, the width N1 of the recess N of the first optical film 141 may be equal to the width D1 of the plate 131 depending on the design.

In some embodiments, as shown in FIGS. 3 and 7, the bottom cover 111 of the back frame 110 has an opening W3 adjacent to the opening W1. The limiting base 120 includes an engaging block 123. The engaging block 123 stands on the lower surface 1212 of the bottom plate 121 and is fitted into the opening W3. In one embodiment, as shown in FIGS. 4 and 8, the shape of the engaging block 123 may be a wedge, and the inclined surface of the engaging block 123 may be used to facilitate the embedding of the limit base 120 into the back frame 110的底盖111。 The bottom cover 111. However, in other implementations (not shown), the engaging block 123 may also be in the form of a sheet, a rod, or a strip.

In some embodiments, the bottom plate 121, the blocking piece 122 and the engaging block 123 may be integrally formed, for example, the material of the bottom plate 121, the blocking piece 122 and the engaging block 123 may be the same material and manufactured by injection molding .

Here, through the design of the engaging block 123 and the opening W3, the limiting base 120 can be assembled with the back frame 110 in a fitting manner. In other words, the limiting base 120 is detachably disposed on the back frame 110. In addition, through the design of the body 151 and the opening W1, the fastener 150 can be assembled with the back frame 110 in a fitting manner. In other words, the fastener 150 is detachably disposed on the back frame 110. Therefore, when the limit base 120 or the fastener 150 is worn out, it can be replaced directly. Or, the conventional components suitable for various backlight modules 100 are manufactured based on the relative relationship or related parameters between the limit base 120, the blocking wall 130, and the fastener 150.

In some embodiments, the first positioning post 132 and the plate body 131 may be integrally formed. For example, the materials of the first positioning post 132 and the plate body 131 may be the same material and manufactured by injection molding.

In some embodiments, the body 151 and the second positioning post 152 may be integrally formed. For example, the material of the body 151 and the second positioning post 152 may be the same material and manufactured by injection molding.

In some embodiments, the backlight module 100 or 200 may further include a light source (not shown), and the light source is accommodated in the space H. The light emitting source may be a light-emitting diode (LED), a cold-cathode fluorescent lamp (Cold-Cathode Fluorescent Lamps, CCFLs), or an electroluminescence element (Electroluminescence, EL). In some implementations, the backlight module 100 or 200 may be a side edge type backlight module (micro side edge type backlight module) or a direct type backlight module (direct type backlight module).

13 is a partial perspective view of a backlight module and a plastic frame according to an embodiment of the invention. 14 is a partial perspective view of the backlight module and the plastic frame corresponding to FIG. 13. 15 is a partial perspective view of a display device according to an embodiment of the invention. 16 is a partial schematic perspective view of the display device corresponding to FIG. 15. For convenience of description, the plastic frame 160 of FIG. 14 is shown with an imaginary line; the front frame 170 of FIG. 16 is shown with an imaginary line to show the internal structure and configuration. Referring to FIGS. 13-16, the display device 300 includes a back frame 110, a limiting base 120, a blocking wall 130, an optical film set 140, a fastener 150, a plastic frame 160, a front frame 170 and a display panel 180. The limit base 120, the blocking wall 130 and the fastener 150 are disposed on the back frame 110, the optical film group 140 is located in the back frame 110, the display panel 180 is located above the back frame 110, and the plastic frame 160 and the front frame 170 Around the back frame 110. The connection relationship and structure of the back frame 110, the limiting base 120, the blocking wall 130, the optical film set 140 and the buckle 150 are substantially the same as those in the previous embodiment, so the same or similarities will not be repeated.

In some embodiments, as shown in FIGS. 13 and 14, the plastic frame 160 has a supporting portion 161 and a first side wall 162. The support portion 161 has a hollow frame shape. The first side wall 162 surrounds and is connected to the support portion 161 and extends toward the bottom cover 111 of the back frame 110. In one embodiment, the first side wall 162 and the support portion 161 intersect substantially perpendicularly. The plastic frame 160 is disposed outside the back frame 110, and the first side wall 162 is located outside the side wall 112 of the back frame 110. In other words, the back frame 110 is accommodated in the plastic frame 160. The first side wall 162 has a snap hole W4, and the snap hole W4 corresponds to the opening W1 of the side wall 112, that is, the snap hole W4 may communicate with the opening W1.

The front frame 170 has a cover portion 171 and a second side wall 172. The cover portion 171 has a hollow frame shape. The second side wall 172 surrounds the periphery of the cover portion 171 and is connected to the cover portion 171, and extends toward the bottom cover 111 of the back frame 110. In one embodiment, the covering portion 171 and the second side wall 172 intersect substantially perpendicularly. The front frame 170 is disposed outside the plastic frame 160, the cover portion 171 is located above the support portion 161, and the second side wall 172 is located outside the first side wall 162. Here, the first side wall 162 is located between the side wall 112 and the second side wall 172. In other words, the plastic frame 160 is accommodated in the front frame 170.

The display panel 180 has a display area M1 and a non-display area M2. The display area M1 of the display panel 180 displays an image, and the non-display area M2 surrounds the periphery of the display area M1. The display panel 180 is located between the support portion 161 and the cover portion 171. The support portion 161 carries the display panel 180, and the cover portion 171 exposes the display area M1 of the display panel 180 and shields the non-display area M2 of the display panel 180. In one embodiment, the display panel 180 may be a liquid crystal panel, but the invention is not limited thereto.

The buckle 150 includes a body 151 and a buckle block 153. The snap block 153 is located on the outer surface 1513 of the body 151 opposite to the space H and protrudes outward from the outer surface 1513. The body 151 is engaged or fitted into the opening W1, and the buckle block 153 penetrates the buckle hole W4. In the assembly process of the display device 300, the buckle 150 is disposed on the side wall 112 of the back frame 110. When the plastic frame 160 is installed on the outside of the back frame 110, the buckle hole W4 of the plastic frame 160 can be buckled on the buckle On the snap block 153 of the piece 150. In one embodiment, the locking block 153 does not protrude from the outer surface of the first side wall 114 adjacent to the second side wall 172. In other words, the buckle block 153 is recessed flush with the outer surface of the first side wall 162 so that the front frame 170 can be smoothly installed on the plastic frame 160.

Here, by adjusting the relative position between the limit base 120 and the baffle 130 to realize the configuration of the optical film group 140, there is no need to produce multiple sets of molds in response to the different design of the display device 300, which also reduces the manufacturing cost. In addition, the buckle block 153 penetrates the buckle hole W4 of the plastic frame 160 so that the plastic frame 160 can be locked to the back frame 110 through the buckle 150.

In the vertical projection direction of the cover portion 171, the cover portion 171 of the front frame 170 can cover the support portion 161, the limiting base 120, the blocking wall 130 and the fastener 150. In some embodiments, the vertical projection range of the blocking wall 130 is within the vertical projection range of the covering portion 171. In some embodiments, as shown in FIG. 15, the edge L2 of the limiting hole L closest to the inner surface 1312 of the board 131 and the inner surface 1122 of the side wall 112 have a first width R1, and the covering portion 171 has The second width R2, and the first width R1 is less than or equal to the second width R2. Here, the arrangement of the optical film group 140 can be adjusted by adjusting the relative position between the limit base 120 and the baffle wall 130, so that the edge area of the optical film group 140 (the recess of the first optical film 141 N or the limiting hole L) of the second optical film 142 will not be exposed in the display area M1.

In some embodiments, the display device 300 may further include a light emitting source (not shown), and the light emitting source is accommodated in the space H to provide light required for the display panel 180 to display an image. The light emitting source may be a light-emitting diode (LED), a cold-cathode fluorescent lamp (Cold-Cathode Fluorescent Lamps, CCFLs), or an electroluminescence element (Electroluminescence, EL).

In an embodiment, the distribution positions of the limiting base 120, the blocking wall 130, and the buckle 150 can be changed according to design considerations of different display devices. In some embodiments, the limit base 120, the blocking wall 130, and the buckle 150 may be distributed on one side of the corresponding display device, as depicted in these drawings. However, in other embodiments, the number of the limiting base 120, the blocking wall 130, and the fastener 150 may also be multiple and distributed on different sides of the display device, for example, the limiting base 120, the blocking The wall 130 and the fastener 150 may be two and distributed on two sides of the display device respectively.

In summary, the backlight module and the display device according to the embodiments of the present invention are movably positioned in the first guide groove by the first positioning post to adjust and limit the first optical film through the plate The position in the space; the second optical film can be hung by the stopper passing through the limit hole. In addition, the buckle block is provided with a buckle hole of the plastic frame, so that the plastic frame can be locked to the back frame through the buckle. In this way, the relative position between the limit base and the baffle wall can be changed according to the displacement of the baffle wall, whereby the arrangement of the optical film group in the space can be adjusted, so that the edge area of the optical film group is not exposed In the display area, there is no need to produce multiple sets of molds in response to the design of different backlight modules and display devices. Compared with the backlight module and the display device, the embodiments of the present invention can be applied to display devices with different frame widths by adjusting the relative position between the limit base and the barrier wall, thereby reducing the manufacturing cost.

Although the technical content of the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art and makes some changes and retouching without departing from the spirit of the present invention should be covered in the present invention. The scope of protection of the present invention shall be subject to the scope of the attached patent application.

100、200‧‧‧Backlight module 110‧‧‧Back frame 111‧‧‧Bottom cover 112‧‧‧Side wall 1121‧‧‧Top surface 1122‧‧‧Inner surface 120‧‧‧Limit base 121‧‧‧ Base plate 1211‧‧‧ Upper surface 122‧‧‧Baffle plate 1212‧‧‧Lower surface 123‧‧‧Clamp block 130‧‧‧Ball wall 131‧‧‧Board body 1311‧‧‧Lower surface 1312‧‧‧Inner surface 132‧‧‧First positioning post 140‧‧‧Optical diaphragm group 141‧‧‧First optical diaphragm 1411, 1421‧‧‧Edge 142‧‧‧Second optical diaphragm 150‧‧‧Clamp 151‧ ‧‧Body 1511‧‧‧Lower surface 1512‧‧‧Inner side 1513‧‧‧Outer surface 152‧‧‧Second positioning column 153‧‧‧Snap block 160‧‧‧Plastic frame 161‧‧‧Support part 162‧ ‧‧First side wall 170‧‧‧Front frame 171‧‧‧ Cover part 172‧‧‧Second side wall 180‧‧‧Display panel 300‧‧‧Display device D1‧‧‧Width E‧‧‧Lub part F1‧ ‧‧Distance G1‧‧‧First guide groove G2‧‧‧Second guide groove G11, G21‧‧‧Inner groove surface H‧‧‧Space L‧‧‧Limiting hole L1‧‧‧Aperture L2‧‧ ‧Edge N‧‧‧Notch N1‧‧‧Width M1‧‧‧Display area M2‧‧‧Non-display area R1‧‧‧First width R2‧‧‧Second width S1, S2‧‧‧Concave parts T1, T2 ‧‧‧Convex U‧‧‧Perforated W1‧‧‧Open W2‧‧‧Slotted W21‧‧‧Slotted surface W3‧‧‧Slotted hole W4‧‧‧Snap hole

FIG. 1 is a partial schematic perspective view of a backlight module according to an embodiment of the invention. FIG. 2 is a partial schematic perspective view of the backlight module corresponding to FIG. 1. FIG. 3 is an exploded view corresponding to the backlight module of FIG. 1. 4 is an exploded view corresponding to the limit base and the retaining wall of FIG. 1. 5 is a partial schematic perspective view of a backlight module according to another embodiment of the invention. FIG. 6 is a partial perspective view of the backlight module corresponding to FIG. 5. 7 is an exploded view of the backlight module corresponding to FIG. 5. 8 is an exploded view corresponding to the limit base and the retaining wall of FIG. 5. FIG. 9 is a partially enlarged schematic view corresponding to area A in FIG. 4. FIG. 10 is a partially enlarged schematic view corresponding to area B in FIG. 8. FIG. 11 is a top view of the backlight module corresponding to FIG. 5. FIG. 12 is a top view of the backlight module corresponding to FIG. 6. 13 is a partial perspective view of a backlight module and a plastic frame according to an embodiment of the invention. 14 is a partial perspective view of the backlight module and the plastic frame corresponding to FIG. 13. 15 is a partial perspective view of a display device according to an embodiment of the invention. 16 is a partial schematic perspective view of the display device corresponding to FIG. 15.

100‧‧‧Backlight module

110‧‧‧back frame

111‧‧‧Bottom cover

112‧‧‧Side wall

122‧‧‧Block

130‧‧‧ Retaining

140‧‧‧Optical diaphragm set

141‧‧‧First optical diaphragm

142‧‧‧Second optical diaphragm

L‧‧‧Limit hole

W2‧‧‧Slotted

W21‧‧‧groove surface

E‧‧‧Luggage

Claims (20)

A backlight module includes: a back frame with a bottom cover and a side wall, the side wall surrounding the bottom cover to form a space; a limiting base, including a bottom plate and at least one baffle plate, the bottom plate is provided On the bottom cover, the at least one blocking piece stands on an upper surface of the bottom plate, the bottom plate has at least a first guide groove; a blocking wall includes a plate body and at least a first positioning post, the plate The body stands on the upper surface of the bottom plate, the at least one first positioning post is located on the lower surface of the plate body and penetrates the at least one first guide groove, wherein the long axis direction of the plate body is substantially vertical In the extending direction of the at least one first guide groove; and an optical film group located in the space, the optical film group includes a first optical film and a second optical film, the first optical film An edge of the sheet adjacent to the baffle wall has a notch and the plate is located in the notch, the second optical film is stacked on the first optical film, and the second optical film has a limiting hole And the at least one baffle is penetrated in the limiting hole; wherein, the at least one first positioning post is movably positioned in the at least one first guiding groove to restrict the first optical film through the plate body The location of the piece in this space. The backlight module according to claim 1, wherein a distance between the blocking wall and the side wall varies along the at least one first guide groove. The backlight module according to claim 1, wherein the opposite inner groove surfaces of the at least one first guide groove respectively have a plurality of convex portions and a plurality of concave portions, and the convex portions located on the opposite two inner groove surfaces are oppositely arranged The concave portions are relatively arranged. When the at least one first positioning column is displaced, the surface of the at least one first positioning column abuts against the two convex portions; when the at least one first positioning column is positioned, the at least one first positioning column A positioning post is located between the two opposing concave portions and the blocking wall is positioned on the bottom plate. The backlight module according to claim 1, further comprising a buckle, the buckle includes a body and at least one second positioning post, the side wall has an opening adjacent to the notch, and the body is locked to the Opening, the bottom plate further has at least one second guide groove, the at least one second positioning post is located on the lower surface of the body and penetrates the at least one second guide groove, the at least one second guide groove The extending direction is parallel to the extending direction of the at least one first guiding groove, and the at least one second positioning post is displaceably positioned in the at least one second guiding groove, so that the buckling member can move toward the block The wall is displaced and positioned on the floor. The backlight module according to claim 4, wherein an inner side surface of the body protrudes toward the space, the plate body has a perforation, and the inner side surface of the body is movable toward the plate body and passes through the perforation . The backlight module according to claim 4, wherein the opposite inner groove surfaces of the at least one second guide groove respectively have a plurality of convex portions and a plurality of concave portions, and the convex portions located on the opposite two inner groove surfaces are arranged oppositely The concave portions are relatively arranged. When the at least one second positioning post is displaced, the surface of the at least one second positioning post abuts against the two convex portions; when the at least one second positioning post is positioned, the at least one first positioning post The two positioning posts are located between the two recesses and the fastener is positioned on the bottom plate. The backlight module according to claim 1, wherein the bottom cover has an opening, and the limiting base further includes an engaging block, and the engaging block is fitted into the opening. The backlight module according to claim 1, wherein the side wall further has a slot extending from a top surface of the side wall toward the bottom cover and communicating with the opening, and a slot surface of the slot is recessed in the On the top surface of the side wall, an edge of the second optical film has a lug portion, the lug portion is located in the slot and on the groove surface. The backlight module according to claim 8, wherein in the extending direction of the side wall, the lug portion is located between the top surface of the side wall and the groove surface of the slot. A display device includes: a plastic frame with a support portion and a first side wall connected to the support portion, the first side wall has a snap hole; a front frame with a cover portion and connected to the cover portion A second side wall, the second side wall is located outside the first side wall, the cover portion is located above the support portion; a display panel is located between the cover portion and the support portion; a back frame has a bottom cover And a side wall, the side wall surrounds the bottom cover to form a space, the first side wall is located between the side wall and the second side wall, the side wall has an opening, and the opening corresponds to the snap hole; a limit The position base includes a bottom plate and at least one baffle plate, the bottom plate is disposed on the bottom cover, the at least one baffle plate stands on an upper surface of the bottom plate, the bottom plate has at least one first guide groove; a card The fastener includes a body and the buckle block, the buckle block is located on an outer surface of the body opposite to the space, the body is engaged with the opening, and the buckle block is penetrated by the buckle hole; The retaining wall includes a plate body and at least one first positioning post, the plate body stands on the upper surface of the bottom plate, the at least one first positioning post is located on the lower surface of the plate body and penetrates the at least one first In a guiding groove, wherein the long axis direction of the plate body is substantially perpendicular to the extending direction of the at least one first guiding groove; and an optical film group is located in the space, and the optical film group includes a first An optical film and a second optical film, an edge of the first optical film adjacent to the baffle wall has a notch and the plate is located in the notch, the second optical film is stacked on the first On an optical film, the second optical film has a limiting hole and the at least one baffle penetrates the limiting hole; wherein, the at least one first positioning post is movably positioned on the at least one first In a guiding groove, the position of the first optical film in the space is restricted through the plate body. The display device according to claim 10, wherein the edge of the limiting hole closest to the inner surface of the board has a first width between the side wall and the covering portion has a second width, the first width Less than or equal to the second width. The display device according to claim 10, wherein in the vertical projection direction of the covering part, the vertical projection range of the blocking wall is within the vertical projection range of the covering part. The display device according to claim 10, wherein a distance between the blocking wall and the side wall varies along the at least one first guide groove. The display device according to claim 10, wherein the opposite inner groove surfaces of the at least one first guide groove respectively have a plurality of convex portions and a plurality of concave portions, and the convex portions located on the opposite inner groove surfaces are oppositely arranged and The concave portions are relatively arranged. When the at least one first positioning post is displaced, the surface of the at least one first positioning post abuts against the two convex portions; when the at least one first positioning post is positioned, the at least one first positioning post The positioning column is located between the two concave portions and the blocking wall is positioned on the bottom plate. The display device according to claim 10, wherein the fastener further includes at least one second positioning post, the side wall has an opening adjacent to the recess, and the bottom plate includes at least one second guide groove, the at least one first Two positioning posts are located on the lower surface of the body and penetrated in the at least one second guide groove, the extension direction of the at least one second guide groove is parallel to the extension direction of the at least one first guide groove, the at least A second positioning post is movably positioned in the at least one second guide slot, so that the buckle is movably displaced toward the blocking wall and positioned on the bottom plate. The display device according to claim 15, wherein an inner side surface of the body protrudes toward the space, the plate body has a perforation, and the inner side surface of the body is movable toward the plate body and passes through the perforation. The display device according to claim 15, wherein the opposite inner groove surfaces of the at least one second guide groove respectively have a plurality of convex portions and a plurality of concave portions, and the convex portions located on the opposite two inner groove surfaces are oppositely arranged and The concave portions are relatively arranged. When the at least one second positioning post is displaced, the surface of the at least one second positioning post abuts against the two convex portions; when the at least one second positioning post is positioned, the at least one second positioning post The positioning column is located between the two concave portions and the fastener is positioned on the bottom plate. The display device according to claim 10, wherein the bottom cover has an opening, and the limiting base further includes an engaging block, and the engaging block is fitted into the opening. The display device according to claim 10, wherein the side wall further has a slot extending from a top surface of the side wall to the bottom cover and communicating with the opening, and a groove surface of the slot is recessed in the side wall The top surface of the second optical film has a lug portion, the lug portion is located in the slot and on the groove surface. The display device according to claim 19, wherein in the extending direction of the side wall, the lug portion is located between the top surface of the side wall and the groove surface of the slot.

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