TWI595294B - Backlight module and protection film of optical films of the same - Google Patents

Description

Protective film for backlight module and its optical film

The invention relates to a protective film, and in particular to a protective film for an optical film of a backlight module.

In order to prevent the backlight module from being scratched, dirty or deformed during the handling or storage process, the backlight module is covered with a protective film on the optical film.

However, because the material of the protective film usually has a certain stiffness, in the process of tearing the protective film away from the optical film of the backlight module, the protective film finally leaves the corner of the optical film and scratches the optical film due to rebound. The surface of the sheet causes an increase in the defect rate.

In view of the above, it is an object of the present invention to provide a backlight module and a protective film for the optical film thereof to solve the difficulties mentioned in the prior art.

In order to achieve the above object, according to an embodiment of the present invention, the backlight module comprises a frame, at least one optical film, and a protective film. With a double-sided tape. The optical film is placed on the frame. The protective film includes a body and at least one line cut. The body has a first angle and a second angle that are diagonal to each other. The wire cut is located on the body to divide the body into one of the first zone and the second zone. The area of the second zone is larger than the area of the first zone, and the wire cut is substantially parallel to one of the sides of the body. The opposite sides of the double-sided tape respectively have a first adhesive surface and a second adhesive surface, and the second adhesive surface is adhered to the edge of the optical film or the frame, and the first adhesive surface is adhered to the protective film.

In one or more embodiments of the present invention, the body has a first side, a second side, a third side, and a fourth side. The first side is substantially parallel to the third side, the second side is substantially parallel to the fourth side, the first side forms a first angle with the second side, and the third side and the fourth side A second angle is formed between them.

In one or more embodiments of the invention, the protective film further comprises a tear-over lug. The tear-off lug is formed on the first side or the second side and adjacent to the first corner, wherein the line cut is adjacent to the second corner.

In one or more embodiments of the present invention, the wire cut is substantially L-shaped, the long sides of the wire cuts are substantially parallel to the third side and the short sides of the line cuts are connected to the third side.

In one or more embodiments of the present invention, the wire cut is substantially L-shaped, the long sides of the wire cuts are substantially parallel to the fourth side edges, and the short sides of the line cuts are connected to the fourth side edges.

In one or more embodiments of the invention, the wire cut connects the first side or the second side.

In one or more embodiments of the present invention, the first zone and the second zone The junction of the zone contains the second corner.

In one or more embodiments of the present invention, the optical film has a viewing zone and a peripheral zone located at a periphery of the viewing zone, and the second zone is located in a peripheral zone of the optical film.

In one or more embodiments of the invention, the first adhesive surface is adhered to the first region.

According to an embodiment of the invention, the protective film of the optical film comprises a body and at least one line slit. The body has a first angle and a second angle that are diagonal to each other. The wire cut is located on the body to divide the body into one of the first zone and the second zone. The area of the second zone is larger than the area of the first zone, and the wire cut is substantially parallel to one of the sides of the body.

In this way, since the line slit of the protective film of the optical film is divided into the first region and the second region, even if the protective film is peeled off from the optical film of the backlight module, even if the protective film is finally peeled off The corner has left the optical film of the backlight module, because the first region of the protective film still adheres to the optical film, and the last corner to be peeled off on the protective film can be pulled by the first region of the protective film. In this way, the corner that will be peeled off on the protective film will not scratch the surface of the optical film due to the rebound, thereby avoiding an increase in the defect rate. In addition, since the appearance of the protective film is not substantially changed, it does not increase the cost and does not affect the process operation.

100~103‧‧‧Protective film

110‧‧‧ body

110a‧‧‧First District

110b‧‧‧Second District

110c‧‧‧ Connection

111‧‧‧ positive

112‧‧‧n

113‧‧‧ first side

114‧‧‧Second side

115‧‧‧ third side

116‧‧‧ fourth side

117‧‧‧ first corner

118‧‧‧second corner

119‧‧‧ third corner

120‧‧‧fourth corner

130~133‧‧‧ line cut

130a~131a‧‧‧Longside

130b~131b‧‧‧ Short side

140‧‧‧Tear the lugs

200‧‧‧Backlight module

210‧‧‧Frame

211‧‧‧ Surrounding

212‧‧‧ accommodating slots

220‧‧‧Reflecting film

230‧‧‧Light guide plate

240‧‧‧Optical diaphragm group

241‧‧‧Optical diaphragm

242‧‧‧visible area

243‧‧‧The surrounding area

250‧‧‧Lighting unit

251‧‧‧Flexible circuit board

252‧‧‧Lighting diode

260‧‧‧Double-sided tape

261‧‧‧ Surrounding

262‧‧‧ first adhesive surface

263‧‧‧second adhesive surface

264‧‧‧Central opening

D‧‧‧ Direction

1 is a front elevational view of a protective film according to a first embodiment of the present invention; 2A is a combination diagram of a backlight module having a protective film according to the first embodiment; FIG. 2B is an exploded view of FIG. 2A; and FIG. 3A to FIG. 3C are diagrams showing a backlight module from FIG. 2A; FIG. 4 is a partial view of the protective film in accordance with the second embodiment of the present invention; FIG. 5 is a front view of the protective film according to the second embodiment of the present invention; A front view showing a protective film according to a third embodiment of the present invention; and a seventh front view showing a protective film according to a fourth embodiment of the present invention.

The embodiments of the present invention are disclosed in the following drawings, and the details of However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

First embodiment

Fig. 1 is a front elevational view showing a protective film 100 according to a first embodiment of the present invention. This protective film 100 includes a body 110 and a wire slit 130. The body 110 has at least a first angle 117 and a second angle 118 in a diagonal relationship with each other, the first angle 117 and second corner 118 are respectively formed by sandwiching two adjacent sides. The wire slit 130 is located on the body 110 for dividing the body 110 into the first region 110a and the second region 110b which are connected to each other. The area of the second zone 110b is greater than the area of the first zone 110a, and at least a portion of the wire cuts 130 are parallel or substantially parallel to one of the sides of the body 110.

More specifically, the body 110 has a rectangular shape, and has a front surface 111, a reverse surface 112 (second FIG. 2B), a first side edge 113, a second side edge 114, a third side edge 115, and a fourth side edge 116. The front surface 111 and the back surface 112 For the opposite sides. The first side 113 is parallel or substantially parallel to the third side 115, the second side 114 is parallel or substantially parallel to the fourth side 116, and the first side 113 forms a first space with the adjacent second side 114. An angle 117 and a second angle 118 is formed between the third side 115 and the adjacent fourth side 116. In addition, a third angle 119 is formed between the second side edge 114 and the adjacent third side edge 115, and a fourth angle 120 is formed between the first side edge 113 and the adjacent fourth side edge 116, and the third angle 119 and the fourth angle are formed. The angles 120 are diagonal to each other. As can be seen from Figures 1 and 2, the line cuts 130 are at least partially parallel or substantially parallel to the fourth side 116.

In more detail, the wire slit 130 is substantially L-shaped and has a long side 130a and a short side 130b. The long side 130a of the line cut 130 is parallel or substantially parallel to the fourth side 116, and the short side 130b of the line cut 130 is connected to the fourth side 116. The long side 130a of the line cut 130 meets and intersects the short side 130b, and the long side 130a and the short side 130b are, for example, perpendicular or substantially perpendicular to each other. Since the line slit 130 penetrates the front surface 111 and the back surface 112, the junction 110c between the first region 110a and the second region 110b, which is divided by the line slit 130, includes a second corner 118, that is, the line slit 130 is adjacent to the second corner 118. However, the invention is not limited thereto.

In addition, the protective film 100 further includes a tear-off lug 140. The tear-off lug 140 is formed on the second side edge 114 adjacent the first corner 117, that is, the tear-off lug 140 extends from the second side edge 114 away from the fourth side edge 116.

However, the above description is by way of example only and not as a limitation of the invention. The person having ordinary knowledge in the technical field of the present invention may also form the tearing lug on the first side or directly connected to the first corner according to actual needs, or the tearing lug may be formed on the first side together. Side and second side.

FIG. 2A is a combination view of the backlight module 200 having the protective film 100 of the first embodiment. FIG. 2B is an exploded view of FIG. 2A. As shown in FIG. 2A and FIG. 2B , in this embodiment, the backlight module 200 includes, for example, a frame 210 , a light reflecting sheet 220 , a light guide plate 230 , an optical film set 240 , a light emitting unit 250 , and a double-sided tape 260 . The frame 210 has a surrounding portion 211 and a receiving groove 212. The surrounding portion 211 surrounds the receiving groove 212. The reflector 220 is located in the receiving slot 212 of the frame 210. The light guide plate 230 is located in the receiving slot 212 of the frame 210, and is stacked. Placed on the retroreflective sheeting 220. The optical film set 240 is stacked on the light guide plate 230, and is composed of a plurality of optical films 241 (for example, a brightness enhancement film) stacked on each other. The light emitting unit 250 is located in the receiving groove 212 of the frame 210 and corresponds to the side of the light guide plate 230 to emit light toward the light guide plate 230. The light emitting unit 250 includes a flexible circuit board 251 and a plurality of light emitting diodes 252. The light emitting diode 252 is disposed on the flexible circuit board 251. The opposite sides of the double-sided tape 260 respectively have a first adhesive surface 262 and a second adhesive surface 263. The first adhesive surface 262 is adhered to the reverse surface 112 of the protective film 100, and the second adhesive surface 263 is adhered to the optical film 241.

However, the above description is by way of example only and not as a limitation of the invention. Those having ordinary knowledge in the technical field of the present invention should also change the second adhesive surface of the double-sided tape to the edge of the frame (such as the top surface of the surrounding portion), or at the same time, to the optical film and The edge of the frame (such as the top surface of the surrounding part).

For example, the optical film 241 includes a visible area 242 and a peripheral area 243. The visible area 242 corresponds to a display screen of a display panel (not shown), and the peripheral area 243 is located at the periphery of the visible area 242. One of the first region 110a to the frame 210 and the optical film 241 of the protective film 100 is orthographically projected on the peripheral region 243 of the optical film 241.

However, the above description is by way of example only and not as a limitation of the invention. When the area of the protective film is large enough to cover the frame, it is generally known in the art to which the present invention pertains, and the first region of the protective film to the frame and one of the optical films may be orthographically projected according to actual needs. Located at the edge of the frame (such as the top surface of the surrounding portion), or with the first area of the protective film to the frame and one of the optical film being orthographically projected at the edge of the frame (such as the top surface of the surrounding portion) and the periphery of the optical film Area.

More specifically, the double-sided tape 260 includes at least one surrounding portion 261 by one side of the double-sided tape 260 (i.e., FIG. 2B). The surrounding portion 261 is generally "□" shaped, the surrounding portion 261 is provided with a central opening 264 therein, and the central opening 264 exposes the visible region 242 of the optical film 241. The first adhesive surface 262 and the second adhesive surface 263 are respectively located on opposite sides of the surrounding portion 261.

It should be understood that since one of the first region 110a to the optical film 241 of the protective film 100 is orthographically projected in the peripheral region of the optical film 241 243, rather than the visible area 242, so that when dust particles fall through the wire cut 130 to the optical film 241, the dust particles do not obscure or contaminate the visible area 242 of the optical film 241.

3A and 3B are sequential views in which the protective film 100 is partially torn from the optical film 241. Fig. 4 is a partial view showing the direction D in the third drawing. When the user wants to tear up the protective film 100, please refer to FIG. 3A. The user first grasps the tearing lug 140. Then, see FIGS. 3B and 4, the user makes the tearing of the lug 140. The protective film 100 is torn apart from the first corner 117 of the body 110 toward the second corner 118. Since the wire slit 130 divides the body 110 into the first region 110a and the second region 110b which are connected to each other, initially only the second region 110b of the body 110 is torn apart, the first region 110a of the body 110 and the first region 110a. The junction 110c (including the second corner 118) with the second zone 110b remains adhered to the double-sided tape 260 of the optical film 241.

3C is a schematic view in which the second region 110b of the protective film 100 has been largely torn from the optical film 241, and its viewing angle is the same as the direction D of FIG. 3B. Next, please refer to FIG. 3C, and continue to tear the joint 110c between the first region 110a and the second region 110b from the optical film 241, and then peel off the second corner 118 of the body 110 of the protective film 100; Finally, the first region 110a of the protective film 100 is peeled off from the optical film 241 to completely detach the protective film 100 from the optical film 241.

Therefore, in the process of tearing the protective film 100 from the first corner 117 of the body 110 toward the second corner 118, the order in which the protective film 100 is torn is the second region 110b, the joint 110c, and the first region. 110a, so, at When the second corner 118 of the protective film 100 will leave the optical film 241, since the first region 110a of the protective film 100 is still adhered to the optical film 241, the second corner 118 of the protective film 100 can be pulled. Thereby, the second corner 118 of the protective film 100 does not scratch the surface of the optical film 241 by the rebound when it is peeled off, thereby avoiding an increase in the defective rate.

Second embodiment

Fig. 5 is a front elevational view showing a protective film 101 according to a second embodiment of the present invention. The protective film 101 of the present embodiment is different from the protective film 100 of the first embodiment described above in that, in the present embodiment, the L-shaped line slit 131 is not located on the fourth side 116 of the body 110, but is located on the body. The third side 115 of the 110. That is, the long side 131a of the L-shaped line slit 131 is parallel or substantially parallel to the third side 115, and the short side 131b of the line slit 131 is connected to the third side 115. The long side 131a of the line slit 131 is in contact with and intersects with the short side 131b, and the long side 131a and the short side 131b are, for example, perpendicular to each other or substantially perpendicular to each other. Other related structural and material details are the same in the first embodiment described above, and thus the description thereof will not be repeated.

Third embodiment

Fig. 6 is a front elevational view showing a protective film 100 according to a third embodiment of the present invention. The protective film 100 of the present embodiment is different from the protective film 100 of the first embodiment described above in that, in the present embodiment, the line slits 132 are linear, parallel or substantially parallel to the fourth side 116 of the body 110, and The first side 113 of the body 110 is directly connected. Other related structural and material details are the same in the first embodiment described above, and thus the description thereof will not be repeated.

Fourth embodiment

Fig. 7 is a front elevational view showing a protective film 100 according to a fourth embodiment of the present invention. The protective film 100 of the present embodiment is different from the protective film 100 of the first embodiment described above in that, in the present embodiment, the line slit 133 is linear, parallel or substantially parallel to the third side 115 of the body 110, and The second side 114 of the body 110 is directly connected. Other related structural and material details are the same in the first embodiment described above, and thus the description thereof will not be repeated.

Finally, the various embodiments disclosed above are not intended to limit the invention, and those skilled in the art can be protected in various modifications and refinements without departing from the spirit and scope of the invention. In the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Protective film

110‧‧‧ body

110a‧‧‧First District

110b‧‧‧Second District

110c‧‧‧ Connection

111‧‧‧ positive

113‧‧‧ first side

114‧‧‧Second side

115‧‧‧ third side

116‧‧‧ fourth side

117‧‧‧ first corner

118‧‧‧second corner

119‧‧‧ third corner

120‧‧‧fourth corner

130‧‧‧ line cut

130a‧‧‧Longside

130b‧‧‧ Short side

140‧‧‧Tear the lugs

Claims (10)

A protective film for an optical film, comprising: a body having a first side, a second side, a third side, and a fourth side, the first side being substantially parallel to the third side The second side edge is substantially parallel to the fourth side edge, a first corner is formed between the first side edge and the second side edge, and a third side edge and the fourth side edge are formed. a second corner, the first corner and the second corner are in a diagonal relationship with each other; and at least one line slit is located on the body for dividing the body into one of the first zone and the second zone. The area of the second area is larger than the area of the first area, and the line cut is substantially parallel to the first side of the body, the second side, the third side, and the fourth side And a tear-up lug formed on the first side or the second side adjacent to the first corner, the line cut being adjacent to the second corner. The protective film of the optical film of claim 1, wherein the line cut is substantially L-shaped, the long side of the line cut is substantially parallel to the third side, and the short side of the line cut connects the third side, Alternatively, the long side of the line cut is substantially parallel to the fourth side and the short side of the line cut connects the fourth side. The protective film of the optical film of claim 1, wherein the wire cut connects the first side or the second side. The protective film of the optical film of claim 1, wherein the junction of the first zone and the second zone comprises the second corner. A backlight module includes: a frame; at least one optical film disposed on the frame; a protective film comprising: a body having a first side, a second side, a third side, and a fourth side, the first side is substantially parallel to the third side, the second side is substantially parallel to the fourth side, and the first side and the second side form a first side a corner, and a second angle formed between the third side and the fourth side, the first angle and the second angle are diagonally opposite each other; at least one line of the slit is located on the body for The body is divided into a first zone and a second zone connected to each other, the area of the second zone is larger than the area of the first zone, and the wire cut is substantially parallel to the first side of the body, the second zone a side edge, one of the third side edge and the fourth side edge; and a tear-off lug formed on the first side edge or the second side edge adjacent to the first corner, the line slit Adjacent to the second corner; and a double-sided tape having a first adhesive surface and a second adhesive surface on opposite sides thereof, wherein the first Adhesive surface of the adhesive edge of the optical film or the frame, the first adhesive surface of the adhesive of the protective film. The backlight module of claim 5, wherein the line cut is substantially L-shaped, the long side of the line cut is substantially parallel to the third side, and the short side of the line cut is connected to the third side, or The long side of the line cut is substantially parallel to the fourth side and the short side of the line cut connects the fourth side. The backlight module of claim 5, wherein the wire cut connects the first side or the second side. The backlight module of claim 5, wherein the connection between the first zone and the second zone comprises the second corner. The backlight module of claim 5, wherein the optical film has a visible area and a peripheral area located at a periphery of the visible area, the first area to the frame and one of the optical films being orthographically projected on the frame or The peripheral region of the optical film. The backlight module of claim 5, wherein the first adhesive surface adheres to the first region.