TWI675238B - Backlight module and display device - Google Patents

Abstract

A backlight module and a display device include a back frame, a limiting base, a blocking wall, and an optical film group. The back frame has a bottom cover and a side wall, and the side wall is surrounded by the bottom cover to form a space. The limiting base includes a bottom plate and a blocking piece. The bottom plate is disposed on the bottom cover and has a first guide groove, and the blocking piece stands on the upper surface of the bottom plate. The retaining wall includes a plate body and a first positioning post. The plate body stands on the upper surface of the bottom plate and the first positioning post passes through 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 first optical film has a notch and the plate is located in the notch. The second optical film has a limiting hole, and the blocking sheet is penetrated in the limiting hole. The first positioning post is movably positioned in the first guide slot to restrict the position of the first optical film in space through the plate body.

Description

Backlight module and display device

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

The current design trend of display devices has evolved from the previous bulky, heavy appearance to thinner and lighter weight, and the width of the frame of the display device gradually moves towards the design of a narrow frame, which reduces the overall size of the display device and The area of the display screen that can be seen under a display device of the same size is larger and the visual effect is better.

However, for a conventional display device with a narrow frame, due to the narrow frame, the narrow frame is less likely to cover the edge of the optical film of the backlight module. That is, the display area of the display panel will be closer to the edge of the optical film of the backlight module. Therefore, the positioning area between the optical film and the backlight module is 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 group. The back frame has a bottom cover and a side wall, and the side wall is surrounded by the bottom cover to form a space. The limiting base includes a bottom plate and at least one baffle. The bottom plate is disposed 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 board body and at least one first positioning post. The board body stands on the upper surface of the bottom plate, and the first positioning post is located on the lower surface of the board body and passes through the first guide groove. Wherein, the long axis direction of the plate 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 barrier wall has a notch, and the plate is located in the notch. The second optical film is stacked on the first optical film and has a limiting hole, and the blocking plate is penetrated in the limiting hole. The first positioning post is movably positioned in the first guide slot to restrict the position of the first optical film in 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 clip, a retaining wall, and an optical film group. The rubber frame has a support portion and a first side wall connected to the support portion, and the first side wall has a buckle 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 cover 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, and the side wall is surrounded by 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 buckle hole. The limiting base includes a bottom plate and at least one baffle. The bottom plate is disposed 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 board body and at least one first positioning post. The board body stands on the upper surface of the bottom plate, and the first positioning post is located on the lower surface of the board body and passes through the first guide groove. Wherein, the long axis direction of the plate 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 barrier wall has a notch, and the plate is located in the notch. The second optical film is stacked on the first optical film and has a limiting hole, and the blocking plate is penetrated in the limiting hole. The first positioning post is movably positioned in the first guide slot to restrict the position of the first optical film in space through the plate body.

In summary, the backlight module and the display device according to the embodiments of the present invention are displaceably positioned in the first guide groove by the first positioning post, so as to adjust and limit the first optical film through the board. Position in space; the second optical film can be hung by the blocking piece passing through the limiting hole. In addition, the buckle block is provided with a buckle hole of the plastic frame, so that the plastic frame can be engaged with the back frame through the buckle. In this way, the relative position between the limiting base and the retaining wall can be changed with the displacement of the retaining wall, thereby adjusting the configuration of the optical film group in the space, so that the edges of the optical film group will not be exposed to In the display area, there is no need to make multiple sets of molds according 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 positions between the limiting base and the blocking wall, thereby reducing the manufacturing cost.

FIG. 1 is a partial perspective view of a backlight module according to an embodiment of the present invention. FIG. 2 is a partial perspective view of the backlight module corresponding to FIG. 1. FIG. 3 is an exploded view of the backlight module corresponding to FIG. 1. FIG. 4 is an exploded view of the limit base and the retaining wall corresponding to FIG. 1. Among them, for the convenience of explanation, the sidewall 112 of FIG. 1 is shown by imaginary lines; FIG. 2 omits the second optical film 142 of FIG. 1; FIG. 3 omits the optical film group 140 of FIG. The internal structure and configuration of the backlight module 100 are shown. Referring 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 group 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 confined in the back frame 110 by the blocking wall 130. Space H.

The back frame 110 includes a bottom cover 111 and a side wall 112. The sidewall 112 surrounds the edge of the bottom cover 111 and connects to the edge of the bottom cover 111, so that a space H is formed between the sidewall 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 one 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 blocking pieces 122, and the two blocking pieces 122 are separated by a distance and located at opposite ends of the base plate 121. In addition, it should be noted that the number and position of the blocking pieces 122 are merely examples, and are not intended to limit 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 material. 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 passes through the first guide groove G1, and the first positioning post 132 is movably positioned in the first guide groove G1. The major axis direction of the plate body 131 is substantially perpendicular to the extending direction of the first guide groove G1. Here, the retaining wall 130 is movably (for example, displaceably) disposed on the limiting base 120, and the retaining wall 130 can be displaced in accordance with 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 change 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 an embodiment, as shown in FIG. 4, the retaining wall 130 includes two first positioning posts 132, and the two first positioning posts 132 correspond to the positions of the two first guide grooves G1, respectively. In addition, it should be noted that the numbers and positions of the first positioning posts 132 and the first guide grooves G1 are merely examples, and are not intended to limit the embodiments of the present invention.

The optical film 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 notch 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 through 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 is not limited to, an optical film such as a diffusion sheet, a reflection sheet, a brightness enhancement sheet, or a reflective brightness enhancement sheet.

Here, the first positioning post 132 of the retaining wall 130 is displaceably 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 base 120 is inserted into the limiting hole L, so that the second optical film 142 can be hung on the blocking piece 122 of the limiting base 120. In this way, the relative position between the limiting base 120 and the blocking wall 130 can be changed with the displacement of the blocking wall 130, so that the configuration of the optical film group 140 in the space H can be adjusted without having to respond to different backlights. The design of the module 100 makes multiple sets of molds, which also reduces the manufacturing cost.

FIG. 5 is a partial perspective view of a backlight module according to another embodiment of the present invention. FIG. 6 is a partial perspective view of the backlight module corresponding to FIG. 5. FIG. 7 is an exploded view of the backlight module corresponding to FIG. 5. FIG. 8 is an exploded view of the limit base and the retaining wall corresponding to FIG. 5. Among them, for convenience of explanation, the side wall 112 of FIG. 5 is drawn with imaginary lines; FIG. 6 omits the second optical film 142 of FIG. 5; and FIG. 7 omits the optical film group 140 of FIG. 5. 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 latching member 150, and the latching member 150 is movably (eg, displaceably) disposed on the limiting base 120. The fastener 150 includes a main 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 notch N, and the bottom plate 121 of the limiting base 120 further has at least one second guiding groove G2. The main body 151 is engaged or fitted into the opening W1 of the side wall 112. The second positioning post 152 is passed through 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 buckle 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, the distance between the latch 150 and the blocking wall 130 can be changed 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 buckle 150 includes a second positioning post 152, and the bottom plate 121 of the limiting base 120 has a first positioning groove located between the two first guiding grooves G1. Two guide grooves G2. The second positioning post 152 corresponds to a 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 merely examples, and are not intended to limit the embodiments of the present invention.

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

FIG. 9 is a partially enlarged schematic diagram corresponding to the area A in FIG. 4. In some embodiments, as shown in FIG. 9, the opposite 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 these convex portions of the same inner groove surface G11 T1 is continuously connected to these recesses S1 and is alternately arranged. In other words, one of the inner groove surfaces G11 has a plurality of protrusions facing the other inner groove surface G11 to form a plurality of the convex portions T1, and any two adjacent convex portions T1 of the convex portions T1 are connected The recess S1 is formed everywhere. The convex portions T1 located opposite the two inner groove surfaces G11 are oppositely disposed and the concave portions S1 are oppositely disposed. That is, each convex portion T1 of one of the inner groove surfaces G11 corresponds to each of the convex portions T1 of the other inner groove surface G11, and each of the concave portions S1 of one of the inner groove surfaces 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 passes through the first guide groove G1. When the first positioning post 132 is displaced, the surface of the first positioning post 132 abuts the opposite two convex portions T1 opposite to the two inner groove surfaces G11 and slides along the surface of the opposite two convex portions T1. Here, the displacement amount 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 relative positioning of the first positioning post 132 on the two internal 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 two opposite concave portions S1 opposite to the 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 diagram corresponding to a region B in FIG. 8. As shown in FIG. 10, in some embodiments, the two opposite 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 these convex portions of the same inner groove surface G21 T2 is continuously connected to these recesses S2 and alternately arranged. 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 the convex portions T2, and any two adjacent convex portions T2 of the convex portions T2 are connected to each other. The recess S2 is formed everywhere. The convex portions T2 located opposite the two inner groove surfaces G21 are oppositely disposed, and the concave portions S2 are oppositely disposed. That is, each convex portion T2 of one of the inner groove surfaces G21 corresponds to each of the convex portions T2 of the other inner groove surface G21, and each of the concave portions S2 of one of the inner groove surfaces 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 passes through the second guide groove G2. When the second positioning post 152 is displaced, the surface of the second positioning post 152 abuts the opposite two convex portions T2 opposite the two inner groove surfaces G21 and slides along the surface of the opposite two convex portions T2. Here, the amount of displacement of the latching member 150 on the limit base 120 can be adjusted by the number of the opposite 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 two opposite concave portions S2 opposite to the two inner groove surfaces G21. Here, the buckle 150 is positioned on the bottom plate 121 of the limiting base 120.

Here, the convex portion (convex portion T1 and convex portion T2) and the concave portion (concave portion S1) of the inner groove surfaces (the inner groove surface G11 and the inner groove surface G21) of the first guide groove G1 and the second guide groove G2. And the recess 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 shape 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 an embodiment, as shown in FIG. 9 and FIG. 10, the convex portions (convex portion T1 and convex portion T2) and the concave portions (concave portion S1 and concave portion S2) both have successively curved arc-like teeth. However, in other embodiments, the convex portion (convex portion T1 and convex portion T2) and the concave portion (concave portion S1 and concave portion S2) may also have a pyramidal sawtooth shape (not shown) and a quadrangular sawtooth shape (not shown). (Not shown) or other suitable shapes (not shown).

In some embodiments, as shown in FIG. 1, FIG. 2, FIG. 3, FIG. 5 and FIG. 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 to the bottom cover 111 and the slotted slot 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 to the bottom cover 111 and communicate with the opening W1. An edge 1421 of the second optical film 142 has a lug portion E, and the lug portion E is located on the slot W2 and on the slot surface W21. Among them, the lug portion E can be attached to the groove surface W21 of the slot W2 according to the design.

In an embodiment, as shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 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 opening. The groove surface W21 of the groove W2.

In an embodiment, as shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 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 slot 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 film group 140 or the assembly design of other components. Is a top surface 1121 protruding from the side wall 112.

In one 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 limiting base 120, the blocking wall 130, and the buckle 150 can be distributed on one side of the corresponding backlight module, as shown in these drawings. However, in other embodiments, the number of the limiting base 120, the blocking wall 130, and the buckle 150 may be multiple and distributed on different sides of the backlight module, such as the limiting base 120, The blocking wall 130 and the fastener 150 can be two each and are respectively distributed on two sides of the backlight module.

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

FIG. 12 is a top view of the backlight module corresponding to FIG. 6. Among them, for the convenience of description, FIG. 12 omits the second optical film 142 of FIG. 11, so the internal structure and configuration of the backlight module 200 can be shown. Please refer to FIG. 12. In some embodiments, considering that the optical film group 140 may have an assembly tolerance during assembly or expand due to heat, the gap between the notch N of the first optical film 141 and the plate body 131 may be considered. Allow for clearance to accommodate assembly tolerances or shrinkage. Here, the width N1 of the notch N of the first optical film 141 may be larger than the width D1 of the plate body 131 along the long axis direction thereof. However, in other embodiments, the width N1 of the notch N of the first optical film 141 may be equal to the width D1 of the plate body 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 fits into the opening W3. In an embodiment, as shown in FIGS. 4 and 8, the shape of the engaging block 123 may be a wedge-shaped body, and the inclined surface of the engaging block 123 may be used to facilitate the insertion of the limiting base 120 into the back frame 110.的 底盖 111。 The bottom cover 111. However, in other embodiments (not shown in the figure), the engaging block 123 may be 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 three materials 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, with the design of the engaging block 123 and the opening W3, the position-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, with the design of the body 151 and the opening W1, the latch 150 can be assembled with the back frame 110 in a fitting manner. In other words, the buckle 150 is detachably disposed on the back frame 110. Therefore, when the limiting base 120 or the buckle 150 is worn out, it can be replaced directly. Or, the relative relationship between the limiting base 120, the blocking wall 130 and the fastener 150 or related parameters is used to make conventional components suitable for various backlight modules 100.

In some embodiments, the first positioning post 132 and the plate 131 may be integrally formed. For example, the materials of both the first positioning post 132 and the plate 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 materials of both 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 contained in the space H. The light source can be a light-emitting diode (LED), a cold-cathode fluorescent lamp (CCFLs), or an electroluminescence (EL) element. In some embodiments, the backlight module 100 or 200 may be a side edge type backlight module or a direct type backlight module.

13 is a schematic partial perspective view of a backlight module and a plastic frame according to an embodiment of the present invention. FIG. 14 is a partial perspective view of the backlight module and the plastic frame corresponding to FIG. 13. 15 is a schematic partial perspective view of a display device according to an embodiment of the present invention. FIG. 16 is a partial perspective view of the display device corresponding to FIG. 15. Among them, for the convenience of description, the plastic frame 160 of FIG. 14 is shown by imaginary lines; the front frame 170 of FIG. 16 is shown by imaginary lines to show the internal structure and configuration. Referring to FIGS. 13 to 16, the display device 300 includes a back frame 110, a limiting base 120, a blocking wall 130, an optical film group 140, a clip 150, a plastic frame 160, a front frame 170, and a display panel 180. The limiting base 120, the retaining 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. The plastic frame 160 and the front frame 170 Around the back frame 110. Wherein, the connection relationship and structure of the back frame 110, the limiting base 120, the blocking wall 130, the optical film group 140, and the buckling member 150 are substantially the same as those in the foregoing embodiment, so the same or similar parts are not described again.

In some embodiments, as shown in FIGS. 13 and 14, the plastic frame 160 has a support portion 161 and a first side wall 162. The support portion 161 has a hollow frame shape. The first side wall 162 surrounds the periphery of the support portion 161 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 sidewall 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 contained in the plastic frame 160. The first sidewall 162 has a buckling hole W4, and the buckling hole W4 corresponds to the opening W1 of the sidewall 112, that is, the buckling hole W4 can communicate with the opening W1.

The front frame 170 includes a cover portion 171 and a second side wall 172. The covering 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 sidewall 162 is located between the sidewall 112 and the second sidewall 172. In other words, the plastic frame 160 is received 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 present invention is not limited thereto.

The buckle 150 includes a main body 151 and a buckle block 153. The buckling 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 buckling block 153 passes through the buckling hole W4. In the assembling 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 locked to the buckle The buckling block 153 of the piece 150 is on. In one embodiment, the buckling 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 buckling block 153 is recessed on the outer surface of the first side wall 162 flush with the first side wall 162 so that the front frame 170 can be smoothly installed on the plastic frame 160.

Here, the configuration of the optical film group 140 is realized by adjusting the relative positions between the limiting base 120 and the blocking wall 130, so that it is not necessary to make multiple sets of molds according to the design of different display devices 300, and the manufacturing is also reduced. cost. In addition, the latching block 153 is provided with the latching hole W4 of the plastic frame 160 so that the plastic frame 160 can be engaged with the back frame 110 through the latching member 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 limit base 120, the blocking wall 130, and the latch 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, a first width R1 is formed between the edge L2 of the limiting hole L closest to the inner surface 1312 of the plate body 131 and the inner surface 1122 of the side wall 112, 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 configuration of the optical film group 140 can be adjusted by adjusting the relative position between the limit base 120 and the blocking wall 130 so that the edge region of the optical film group 140 (the notch of the first optical film 141 N or the limiting hole L) of the second optical film 142 is not exposed in the display region M1.

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

In one embodiment, the distribution positions of the limiting base 120, the blocking wall 130, and the buckle 150 can be changed according to the design considerations of different display devices. In some embodiments, the limiting base 120, the blocking wall 130, and the latching member 150 may be distributed on one of the sides of the corresponding display device, as shown in these drawings. However, in other embodiments, the number of the limiting base 120, the blocking wall 130, and the latching member 150 may be multiple and distributed on different sides of the display device, such as the limiting base 120, the blocking The wall 130 and the fastener 150 can be two each and are respectively distributed on two sides of the display device.

In summary, the backlight module and the display device according to the embodiments of the present invention are displaceably positioned in the first guide groove by the first positioning post, so as to adjust and limit the first optical film through the board. Position in space; the second optical film can be hung by the blocking piece passing through the limiting hole. In addition, the buckle block is provided with a buckle hole of the plastic frame, so that the plastic frame can be engaged with the back frame through the buckle. In this way, the relative position between the limiting base and the retaining wall can be changed with the displacement of the retaining wall, so that the configuration 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, it is not necessary to make multiple sets of molds according 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 positions between the limiting base and the blocking 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. Any person skilled in the art and making some changes and retouching without departing from the spirit of the present invention should be covered by the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended patent application.

100, 200‧‧‧ backlight module

110‧‧‧back frame

111‧‧‧ bottom cover

112‧‧‧ sidewall

1121‧‧‧Top

1122‧‧‧Inner surface

120‧‧‧Limit base

121‧‧‧ floor

1211‧‧‧ Top surface

122‧‧‧baffle

1212‧‧‧ lower surface

123‧‧‧Snap Block

130‧‧‧ Retaining wall

131‧‧‧ plate

1311‧‧‧ lower surface

1312‧‧‧Inner surface

132‧‧‧first positioning post

140‧‧‧Optical film set

141‧‧‧The first optical diaphragm

1411, 1421‧‧‧Edge

142‧‧‧Second optical film

150‧‧‧Snap fastener

151‧‧‧ Ontology

1511‧‧‧ lower surface

1512‧‧‧ inside

1513‧‧‧outer surface

152‧‧‧Second positioning post

153‧‧‧Snap block

160‧‧‧ plastic frame

161‧‧‧ support

162‧‧‧first side wall

170‧‧‧ front frame

171‧‧‧covering department

172‧‧‧Second sidewall

180‧‧‧Display Panel

300‧‧‧ display device

D1‧‧‧Width

E‧‧‧ lug

F1‧‧‧distance

G1‧‧‧First guide slot

G2‧‧‧Second guide groove

G11 、 G21‧‧‧Inner groove surface

H‧‧‧ space

L‧‧‧ limit hole

L1‧‧‧ Aperture

L2‧‧‧Edge

N‧‧‧notch

N1‧‧‧Width

M1‧‧‧ display area

M2‧‧‧ non-display area

R1‧‧‧first width

R2‧‧‧Second width

S1, S2 ‧‧‧ recess

T1, T2 ‧‧‧ convex

U‧‧‧ perforated

W1‧‧‧ opening

W2‧‧‧Slotted

W21‧‧‧Slotted surface

W3‧‧‧ Opening

W4‧‧‧Snap hole

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

Claims (20)

A backlight module includes: a back frame having a bottom cover and a side wall, the side wall is surrounded by the bottom cover to form a space; a position-limiting base, including a bottom plate and at least one baffle, the bottom plate is provided On the bottom cover, the at least one baffle stands on an upper surface of the bottom plate, the bottom plate has at least a first guide groove; a baffle wall includes a plate body and at least a first positioning post, the plate The body is standing on the upper surface of the bottom plate, the at least one first positioning post is located on the lower surface of the plate and passes through the at least one first guide groove, wherein the long axis direction of the plate 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 including a first optical film and a second optical film, the first optical film An edge of the sheet adjacent to the barrier wall has a notch and the plate is located in the notch. The second optical film is stacked on the first optical film. 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 Displaceably positioned in the at least one first guide grooves to limit the first optical film through the plate in a position in the space. The backlight module according to claim 1, wherein a distance between the blocking wall and the side wall changes along the at least one first guide groove. The backlight module according to claim 1, wherein the two opposite inner groove surfaces of the at least one first guide groove have a plurality of convex portions and a plurality of concave portions, respectively, and the convex portions located on the two opposite inner groove surfaces are oppositely disposed. And the recesses are oppositely arranged, and 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 parts; when the at least one first positioning post is positioned, the to At least one first positioning post is located between the two opposite recesses and the retaining wall is positioned on the bottom plate. The backlight module according to claim 1, further comprising a fastener, the fastener includes a body and at least a second positioning post, the side wall has an opening adjacent to the recess, and the body is engaged with the Opening, the bottom plate further has at least one second guide slot, the at least one second positioning post is located on the lower surface of the body and penetrates through the at least one second guide slot, the at least one second guide slot The extending direction is parallel to the extending direction of the at least one first guide groove, and the at least one second positioning post is movably positioned in the at least one second guide groove, so that the buckle can be movably directed toward the stopper. The wall is displaced and positioned on the floor. The backlight module according to claim 4, wherein an inner side surface of the body projects toward the space, the plate body has a perforation, and the inner side surface of the body is movably movable toward the plate body and passes through the perforation. . The backlight module according to claim 4, wherein the opposite two inner groove surfaces of the at least one second guide groove have a plurality of convex portions and a plurality of concave portions, respectively, and the convex portions located on the opposite two inner groove surfaces are oppositely disposed. And the recesses are oppositely arranged, and when the at least one second positioning post is displaced, the surface of the at least one second positioning post abuts against the two protruding parts; when the at least one second positioning post is positioned, the at least one first Two positioning posts are located between the two opposite recesses and the buckle is positioned on the bottom plate. The backlight module according to claim 1, wherein the bottom cover has an opening, 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 sidewall further has a slot, the slot extends from a top surface of the sidewall to the bottom cover and communicates with the opening, and a slot surface of the slot is recessed in the slot. The top surface of the side wall, an edge of the second optical film has a lug portion, and the lug portion is located on the slot and on the slot surface. The backlight module according to claim 8, wherein the lug portion is located between the top surface of the side wall and the grooved surface in the extending direction of the side wall. A display device includes: a plastic frame having a support portion and a first side wall connected to the support portion, the first side wall having a snap hole; a front frame having 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, which is surrounded by 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 buckle hole; The base includes a bottom plate and at least one baffle, the bottom plate is disposed on the bottom cover, the at least one baffle stands on an upper surface of the bottom plate, and the bottom plate has at least a first guide slot; 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 passes through the buckle hole; The retaining wall includes a plate body and at least one first positioning post. The plate Standing 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 through the at least one first guide groove, wherein the long axis direction of the plate body is substantially perpendicular to An extension direction of the at least one first guide groove; and an optical film group located in the space, the optical film group including a first optical film and a second optical film, the first optical film An edge adjacent to the blocking wall has a notch and the plate is located in the notch. The second optical film is stacked on the first optical film. The second light The learning membrane has a limiting hole and the at least one baffle passes through the limiting hole; wherein the at least one first positioning post is movably positioned in the at least one first guide slot to pass through the limiting hole. The plate restricts the position of the first optical film in the space. The display device according to claim 10, wherein the edge of the limiting hole closest to the inner surface of the plate body has a first width between the side wall and the side wall, the covering portion has a second width, and the first The width is less than or equal to the second width. The display device according to claim 10, wherein a vertical projection range of the barrier wall is within a vertical projection range of the cover portion in a vertical projection direction of the cover portion. The display device according to claim 10, wherein a distance between the blocking wall and the side wall changes along the at least one first guide groove. The display device according to claim 10, wherein the two opposite inner groove surfaces of the at least one first guide groove have a plurality of convex portions and a plurality of concave portions, respectively, and the convex portions located on the two opposite inner groove surfaces are oppositely disposed and The recesses are oppositely disposed. 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 parts. When the at least one first positioning post is positioned, the at least one first The positioning post is located between the two opposite recesses and the retaining wall is positioned on the bottom plate. The display device according to claim 10, wherein the fastener further includes at least a second positioning post, the side wall has an opening adjacent to the recess, the bottom plate includes at least a second guide slot, and the at least one first Two positioning posts are located on the lower surface of the body and pass through the at least one second guide slot. The extension direction of the at least one second guide slot is parallel to the extension direction of the at least one first guide slot. A second positioning post is movably positioned in the at least one second guide slot, so that the buckle can be movably moved toward the retaining wall and positioned on the bottom plate. The display device according to claim 15, wherein an inner side of the body faces The space protrudes, the plate body has a perforation, and the inner side of the body is movably displaced toward the plate body and passes through the perforation. The display device according to claim 15, wherein the opposite two 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 disposed and The recesses are oppositely arranged, and when the at least one second positioning post is displaced, the surface of the at least one second positioning post abuts against the two protruding parts; when the at least one second positioning post is positioned, the at least one second The positioning post is located between the two opposite recesses and the buckle 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, the slot extends from a top surface of the side wall to the bottom cover and communicates with the opening, and a slot surface of the slot is recessed in the side wall On the top surface, an edge of the second optical film has a lug portion, and the lug portion is located on the slot and on the slot surface. The display device according to claim 19, wherein, in an extending direction of the side wall, the lug portion is located between the top surface of the side wall and the slotted surface of the slot.