TWI526736B - Display module and manufacturing method thereof - Google Patents

Description

Display module and manufacturing method thereof

The invention relates to a display module and a manufacturing method thereof, and in particular to a display module for stacking double panels and a manufacturing method thereof.

With the increasing maturity of optoelectronic technology and semiconductor manufacturing technology, flat panel displays are booming. Among them, based on its low voltage operation, no radiation scattering, light weight and small size, the liquid crystal display has gradually replaced the traditional cathode ray tube display, and has become the mainstream of display products in recent years.

On the other hand, in response to the needs of today's multimedia life, flat-panel displays are used in a variety of applications in combination with different functions. For example, a touch display module incorporating a touch function is a product that combines a display panel and a touch panel.

1 is a partial cross-sectional view of a conventional touch display module. As shown in FIG. 1 , the touch display module 100 includes a backlight module 110 , a display panel 120 , a touch panel 130 , and components such as a front frame 140 and an outer frame 150 . The display panel 120 is disposed on the backlight module 110, and the front frame 140 is assembled on the display panel 120 to fix the relative position of the display panel 120 and the backlight module 110. In addition, the touch panel 130 is disposed above the display panel 120 , and the outer frame 150 is assembled on the touch panel 130 to fix the relative position of the touch panel 130 and the display panel 120 .

It is known that the front display 140 is exposed to the display area of the touch display module 100 due to assembly tolerances, and the appearance and display quality of the touch display module 100 are affected. In particular, there is no secure relationship between the display panel 120 and the backlight module 110 before the front frame 140 is assembled. Therefore, the backlight module 110, the display panel, and the front frame 140 are not easily aligned during assembly. Assembly tolerances are easily generated, and assembly yield and assembly speed are relatively reduced.

The invention provides a display module, which can effectively prevent internal components from being exposed and maintain good product appearance and display quality.

The invention provides a display module, which has a compact structure, can reduce the manufacturing cost, and helps simplify the assembly process.

The invention provides a method for manufacturing a display module, which has good assembly yield.

To specifically describe the content of the present invention, a display module is provided, including a backlight module, a first panel, a second panel, and a second frame. The backlight module includes a first frame, and a periphery of the first frame has a side wall portion. The first panel is disposed on the backlight module, and the sidewall portion of the first frame is adapted to bear against a periphery of a bottom surface of the first panel. The second panel is disposed on the first panel, and the second panel and the first panel are spaced apart from each other by a gap. The second frame surrounds the second panel and the first panel and has a bearing portion that extends into the gap. The bearing portion is located at a periphery of the second panel and the first panel, and the bearing portion has a stepped structure on a side facing the first panel. The stepped structure is adapted to bear against a side surface and a top surface of the first panel.

In an embodiment of the invention, the display module further includes a first adhesive layer disposed between the bottom surface of the first panel and the sidewall portion of the first frame.

In an embodiment of the invention, the display module further includes a second adhesive layer disposed between the stepped structure of the bearing portion and the top surface of the first panel.

In an embodiment of the invention, the side wall portion has a flange extending toward the outside of the first frame. The flange has a positioning through hole, and a side of the second frame facing the flange has a positioning post corresponding to the positioning through hole, and the positioning post passes through the positioning through hole.

In an embodiment of the invention, the display module further includes an optical film disposed between the backlight module and the first panel.

In an embodiment of the invention, the backlight module further includes a light guide plate, the first frame carries the light guide plate, and the side wall portion surrounds the light guide plate.

In an embodiment of the invention, the display module further includes a light source device disposed between a side surface and a side wall portion of the light guide plate.

In an embodiment of the invention, the display module further includes a light absorbing layer disposed between the stepped structure of the bearing portion and the first panel.

In an embodiment of the invention, the surface profile of the stepped structure conforms to the contours of the top and side faces of the respective first panel.

In an embodiment of the invention, the second frame further has a clamping portion, the clamping portion and the bearing portion are respectively located on opposite sides of the first panel to jointly clamp the first panel.

A method for fabricating a display module is further provided, comprising the steps of: first assembling a second frame and a second panel, wherein the second frame surrounds the second panel and has a bearing portion extending to the periphery of the second panel . The side of the bearing portion away from the second panel has a stepped structure. Next, a first panel to a second frame is assembled. The stepped structure is adapted to bear against the first panel and the abutment maintains a gap between the second panel and the first panel. Then, a backlight module is assembled onto the first panel. The backlight module includes a first frame having a side wall portion, and the side wall portion bears against a periphery of the first panel.

In an embodiment of the invention, the method for manufacturing the display module further includes disposing a first adhesive layer between the first panel and the sidewall portion of the first frame.

In an embodiment of the invention, the method for manufacturing the display module further includes disposing a second adhesive layer between the stepped structure and the first panel.

In an embodiment of the invention, the side wall portion has a flange extending toward the outside of the first frame. The flange has a positioning through hole, and a side of the second frame facing the flange has a positioning post corresponding to the positioning through hole. When assembling the backlight module to the first panel, the method further comprises: positioning the positioning post through the positioning through hole.

In an embodiment of the invention, the method for manufacturing the display module further includes disposing an optical film between the backlight module and the first panel.

In an embodiment of the invention, the method for fabricating the display module further includes carrying a light guide plate by the first frame, and the side wall portion surrounds the light guide plate.

In an embodiment of the invention, the method for manufacturing the display module further includes disposing a light source device between a side surface and a side wall portion of the light guide plate.

In an embodiment of the invention, the method for fabricating the display module further includes forming a light absorbing layer between the stepped structure and the first panel.

In an embodiment of the invention, the second frame further has a clamping portion, and the clamping portion and the bearing portion together form a receiving groove. When the first panel to the second frame are assembled, the edge of the first panel is inserted into the receiving groove.

Based on the above, the display module of the present invention omits the front frame of the known display module, and instead forms a bearing portion having a stepped structure on the inner side of the second frame for assembling the first panel to the second frame. The first panel is supported and positioned by the stepped structure on the bearing portion to avoid assembly errors, and the cost and the assembly process can be simplified. In addition, since the bearing portion extends between the first panel and the second panel, the internal component exposure due to assembly tolerances or other factors can be effectively blocked, and a good product appearance and display quality are provided.

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

2 is a rear elevational view of a display module in accordance with an embodiment of the present invention. Figure 3A is a partial schematic view of the display module of Figure 2 taken along line A-A'. Fig. 3B is an exploded view of the sectional structure shown in Fig. 3A. Figure 4 is a partial schematic view of the display module of Figure 2 taken along line B-B'.

Referring to FIG. 2, FIG. 3A, FIG. 3B and FIG. 4, the display module 200 of the present embodiment is mainly composed of a backlight module 210, a first panel 220, a second panel 230, and a second frame 240. The backlight module 210 is, for example, a side-lit backlight module including a first frame 212, a light guide plate 214, a light source device 216, and one or more optical films 218. The first frame 212 carries the light guide plate 214, and the periphery of the first frame 212 has a side wall portion 212a surrounding the light guide plate 214. The light source device 216 is, for example, a light-emitting diode light strip or may include other similar light-emitting elements disposed between a side surface 214a of the light guide plate 214 and the corresponding side wall portion 212a for emitting light, and the light is incident from the side surface 214a. It is incorporated into the light guide plate 214 and is converted into a surface light source output.

The first panel 220 is disposed on the backlight module 210 and receives the surface light source. The side wall portion 212a of the first frame 212 is adapted to bear against the periphery of the bottom surface 220a of the first panel 220. The optical film 218 is disposed between the backlight module 210 and the first panel 220. The optical film 218 of the present embodiment may include a gusset, a diffusion sheet, a brightness enhancement sheet, and the like.

The second panel 230 is disposed on the first panel 220, and the second panel 230 and the first panel 220 are spaced apart from each other by a gap 290. The second frame 240 surrounds the first panel 220 and the second panel 230 for fixing the relative positions of the first panel 220 and the second panel 230. In particular, the second frame 240 of the present embodiment has a bearing portion 242 that extends into the gap 290. The bearing portion 242 is located at the outer periphery of the second panel 230 and the first panel 220, and the side of the bearing portion 242 facing the first panel 220 has a stepped structure 242a for supporting the side 220b of the first panel 220. Top surface 220c.

Since the bearing portion 240 of the embodiment extends between the first panel 220 and the second panel 230, the internal component exposure due to assembly tolerances or other factors can be effectively blocked to provide good product appearance and display quality. In addition, compared with the conventional display module, the front frame 140 for fixing the display panel 120 and the backlight module 110 is omitted (refer to FIG. 1), and the second frame 240 is replaced. The bearing portion 242 is formed to bear and position the first panel 220. In this way, not only the number of components of the display module 200 can be reduced, the manufacturing cost is saved, and assembly errors are reduced, and the assembly process is simplified.

On the other hand, in order to make the stepped structure 242a of the bearing portion 242 more stably bear against the first panel 220, the embodiment may further select the surface contour of the stepped structure 242a to be corresponding to the first The top surface 220c of the panel 220 conforms to the contour of the side surface 220b. For example, when the first panel 220 is a liquid crystal display panel, the first panel 220 may include a first substrate 222, a second substrate 224, a liquid crystal layer 226 sandwiched between the first substrate 222 and the second substrate 224, and The first polarizer 228 and the second polarizer 229 outside the first substrate 222 and the second substrate 224. At this time, as shown in the partial enlarged view of FIG. 3A, the difference between the second substrate 224 and the sidewall portion 212a and the difference between the first substrate 222 and the second substrate 224 may be respectively formed into two-step steps. Structure 242a.

In addition, the first panel 220 of the present embodiment is, for example, a liquid crystal display panel, and the second panel 230 is, for example, a touch panel, for forming a display module 200 having a touch function. Of course, the present invention does not limit the types of the first panel 220 and the second panel 230. If possible, the first panel 220 can also be replaced by other types of display panels other than the liquid crystal display panel. In addition, the second panel 230 may also be a panel having a specific function other than the touch panel. For example, in another embodiment of the present invention, the second panel 230 can be replaced with a switchable grating or a lens array for performing switching between the two-dimensional planar display and the three-dimensional stereo display together with the display panel. Furthermore, the side-lit backlight module 210 of the present embodiment can also be replaced by other types of backlight modules (for example, direct-lit backlight modules) in other embodiments. At this time, the light guide plate 214 or the optical film 218 in the backlight module 210 may be omitted, and the setting of the light source device 216 will also change accordingly.

The display module 200 of the present embodiment can also be provided with an adhesive layer (such as a tape) at an appropriate position to fix the relative position between the members. For example, a first adhesive layer 250 may be disposed between the bottom surface 220a of the first panel 220 and the sidewall portion 212a of the first frame 212 to fix the relative position of the first panel 220 and the first frame 212. In addition, a second adhesive layer 260 may be disposed between the stepped structure 242a of the receiving portion 242 and the top surface 220c of the first panel 220 for fixing the relative positions of the first panel 220 and the second frame 240.

In this embodiment, the second adhesive layer 260 may also be replaced by a light absorbing layer, or the second adhesive layer 260 itself may contain a light absorbing material to avoid light leakage between the stepped structure 242a and the first panel 220.

In addition, the present embodiment can also form a cooperating positioning structure between the members to limit the relative displacement between the members in a specific direction after assembly. This method not only improves the accuracy and speed of the assembly process, but also has re-disassemblable characteristics between the positioning structures, thus facilitating the rework of the repair, replacement or assembly process of the components. For example, as shown in a partially enlarged view of FIG. 2 and FIG. 4, the present embodiment may form a plurality of flanges 219 extending toward the outside of the first frame 212 on the side wall portion 212a, and each of the flanges 219 has a positioning through hole. 219a. Further, a side of the second frame 240 facing the flange 219 has a positioning post 249 corresponding to the positioning through hole 219a. The positioning post 249 is adapted to pass through the corresponding positioning through hole 219a to limit the relative displacement of the first frame 212 and the second frame 240 in the planar direction.

When the display module 200 of the present embodiment is fabricated, the aforementioned members can be assembled in an inverted direction. More specifically, as shown in FIG. 2 to FIG. 4, the second frame 240 and the second panel 230 may be assembled first, so that the second frame 240 surrounds the second panel 230, and the bearing portion of the second frame 240. The 242 will extend to the periphery of the second panel 230. The side of the bearing portion 242 remote from the second panel 230 has a stepped structure 242a.

Then, the first panel 220 is assembled to the second frame 240, and the first panel 220 is supported and positioned by the stepped structure 242a. At this time, the bearing portion 242 maintains a gap between the second panel 230 and the first panel 220. 290. In particular, when the surface contour of the stepped structure 242a coincides with the contours of the top surface 220c and the side surface 220b of the corresponding first panel 220, the first panel 220 may be stably placed on the bearing portion 242 of the second frame 240. Certainly, in this embodiment, a second adhesive layer (or light absorbing layer) 260 may be disposed on the stepped structure 242a of the bearing portion 242 or the top surface 220c of the first panel 220 in advance to assemble the first panel 220 to the second At the time of the frame 240, the first panel 220 is fixed to the second frame 240 by the second adhesive layer 260. When the second adhesive layer 260 is replaced with a light absorbing layer or has a light absorbing effect by itself, light leakage between the stepped structure 242a and the first panel 220 can also be avoided.

Thereafter, the backlight module 210 is assembled onto the first panel 220 such that the sidewall portion 212a of the first frame 212 bears against the periphery of the first panel 220. In this embodiment, the first adhesive layer 250 may be disposed on the bottom surface 220a of the first panel 220 or the sidewall portion 212a of the first frame 212 to fix the first panel 220 when the backlight module 210 is assembled to the first panel 220. The relative position to the first frame 212. In addition, as shown in a partial enlarged view of FIG. 2 and FIG. 4, the side wall portion 212a is formed with a flange 219 having a positioning through hole 219a, and the second frame 240 has a positioning post 249 corresponding to the positioning through hole 219a. The flange 219 can be inserted into the positioning post 249 while the backlight module 210 is assembled to the first panel 220 to pass the positioning post 249 through the corresponding positioning through hole 219a. As such, the relative displacement of the first frame 212 and the second frame 240 in the planar direction can be limited. This planar direction is substantially parallel to the direction in which the first panel 220 extends.

5A is a rear elevational view of a semi-finished display module in accordance with another embodiment of the present invention. FIG. 5B is an exploded view of the semi-finished product of the display module of FIG. 5A. Figure 6A is a partial schematic view of the display module of Figure 5A taken along line C-C'. Figure 6B is a partial schematic view of the display module of Figure 5A taken along line D-D'.

Referring to FIG. 5 and FIG. 6 , the display module 500 of the present embodiment is similar in structure to the display module 200 of the foregoing embodiment. The main difference is that the second frame 540 of the display module 500 of the embodiment has a clamping. The portion 544 extends between the first panel 520 and the side wall portion 512a of the first frame 512, and the first panel 520 is clamped together with the bearing portion 542 located on the other side of the first panel 520. In other words, the clamping portion 544 and the bearing portion 542 together form a receiving groove 548.

When the first panel 520 to the second frame 540 are assembled, for example, the first panel 520 is moved in the direction S shown in FIG. 5B, and the edge of the first panel 520 is inserted into the receiving groove 548. Thereafter, the backlight module 510 is assembled to the first panel 520 to substantially complete the fabrication of the display module 500. The accommodating grooves 548 may be formed on one side, two sides or three sides of the first panel 520 to provide different degrees of positioning effects.

In addition, in the embodiment, when the backlight module 510 is assembled to the first panel 520, a third adhesive layer 590 is formed on the bottom surface or the sidewall portion 512a of the clamping portion 544 in advance to fix the backlight module 510 and the first assembly. The relative position of a panel 520.

Of course, the display module 500 of the present embodiment can also be combined with the stepped structure 242a, the second adhesive layer (or light absorbing layer) 260 of the foregoing embodiment, or the mating flange 219 and the positioning post 249, etc. The effect of positioning or avoiding light leakage mentioned in the foregoing embodiments. For detailed structures and implementations of related designs, reference may be made to the foregoing embodiments, and details are not described herein again.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Touch display module

110. . . Backlight module

120. . . Display panel

130. . . Touch panel

140. . . Front frame

150. . . Outer frame

200. . . Display module

210. . . Backlight module

212. . . First frame

212a. . . Side wall

214. . . Light guide

214a. . . Side of the light guide

216. . . Light source device

218. . . Optical diaphragm

219. . . Flange

219a. . . Positioning through hole

220. . . First panel

220a. . . Bottom of the first panel

220b. . . Side of the first panel

220c. . . Top surface of the first panel

222. . . First substrate

224. . . Second substrate

226. . . Liquid crystal layer

228. . . First polarizer

229. . . Second polarizer

230. . . Second panel

240. . . Second frame

242. . . Abutment

242a. . . Step structure

249. . . Positioning column

250. . . First adhesive layer

260. . . Second adhesive layer

290. . . gap

500. . . Display module

510. . . Backlight module

512. . . First frame

512a. . . Side wall

520. . . First panel

540. . . Second frame

542. . . Abutment

544. . . Grip

548. . . Locating slot

590. . . Third adhesive layer

D. . . direction

1 is a partial cross-sectional view of a conventional touch display module.

2 is a rear elevational view of a display module in accordance with an embodiment of the present invention.

Figure 3A is a partial schematic view of the display module of Figure 2 taken along line A-A'.

Fig. 3B is an exploded view of the sectional structure shown in Fig. 3A.

Figure 4 is a partial schematic view of the display module of Figure 2 taken along line B-B'.

5A is a rear elevational view of a display module in accordance with another embodiment of the present invention.

Figure 5B is an exploded view of the display module of Figure 5A.

Figure 6A is a partial schematic view of the display module of Figure 5A taken along line C-C'.

Figure 6B is a partial schematic view of the display module of Figure 5A taken along line D-D'.

200. . . Display module

210. . . Backlight module

212. . . First frame

212a. . . Side wall

214. . . Light guide

218. . . Optical diaphragm

220. . . First panel

220a. . . Bottom of the first panel

220b. . . Side of the first panel

220c. . . Top surface of the first panel

222. . . First substrate

224. . . Second substrate

226. . . Liquid crystal layer

228. . . First polarizer

229. . . Second polarizer

230. . . Second panel

240. . . Second frame

242. . . Abutment

242a. . . Step structure

250. . . First adhesive layer

260. . . Second adhesive layer

290. . . gap

Claims (21)

A display module includes a backlight module including a first frame, and a peripheral portion of the first frame has a sidewall portion, and a first panel disposed on the backlight module, the sidewall of the first frame The second panel is disposed on the first panel, and the second panel is spaced apart from the first panel by a gap; and a second frame surrounds the second panel a panel and the first panel, the second frame has a bearing portion extending into the gap, the bearing portion is located at a periphery of the second panel and the first panel, and the bearing portion faces the first panel One side has a stepped structure adapted to bear against a side surface and a top surface of the first panel. The display module of claim 1, further comprising a first adhesive layer disposed between the bottom surface of the first panel and the sidewall portion of the first frame. The display module of claim 1, further comprising a second adhesive layer disposed between the stepped structure of the bearing portion and the top surface of the first panel. The display module of claim 1, wherein the side wall portion has a flange extending toward the outside of the first frame, the flange having a positioning through hole, the second frame facing the convex portion One side of the edge has a positioning post corresponding to the positioning through hole, and the positioning post passes through the positioning through hole. The display module of claim 1, further comprising a display module An optical film is disposed between the backlight module and the first panel. The display module of claim 1, wherein the backlight module further comprises a light guide plate, the first frame carries the light guide plate, and the side wall portion surrounds the light guide plate. The display module of claim 6, further comprising a light source device disposed between a side surface of the light guide plate and the side wall portion. The display module of claim 1, further comprising a light absorbing layer disposed between the stepped structure of the bearing portion and the first panel. The display module of claim 1, wherein the surface profile of the stepped structure conforms to the contour of the top surface of the corresponding first panel and the side surface. The display module of claim 1, wherein the second frame further has a clamping portion extending between the first panel and the side wall portion, the clamping portion and the bearing portion being clamped together Hold the first panel. The display module of claim 10, further comprising a third adhesive layer disposed between the clamping portion and the side wall portion. A manufacturing method of a display module, comprising: assembling a second frame and a second panel, wherein the second frame surrounds the second panel and has a bearing portion extending to a periphery of the second panel, the bearing portion a side of the second panel has a stepped structure; a first panel is assembled to the second frame, the stepped structure is adapted to bear a side surface and a top surface of the first panel, and the bearing portion Maintaining a gap between the second panel and the first panel; and assembling a backlight module to the first panel, the backlight module includes a first frame, the first frame has a sidewall portion, and the The side wall portion is located at the periphery of the first panel. The method for manufacturing a display module according to claim 12, further comprising: providing a first adhesive layer between the first panel and the side wall portion of the first frame. The method of manufacturing the display module of claim 12, further comprising providing a second adhesive layer between the stepped structure and the first panel. The manufacturing method of the display module of claim 12, wherein the side wall portion has a flange extending toward the outside of the first frame, the flange having a positioning through hole, and the second portion A positioning post facing the flange has a positioning post corresponding to the positioning through hole. When the backlight module is assembled to the first panel, the positioning post is further included in the positioning through hole. The method for manufacturing a display module according to claim 12, further comprising: providing an optical film between the backlight module and the first panel. The method of manufacturing the display module of claim 12, further comprising: carrying a light guide plate by the first frame, and the side wall portion surrounds the light guide plate. The method for manufacturing a display module according to claim 17, further comprising providing a light source device between a side surface of the light guide plate and the side wall portion. The method for manufacturing a display module according to claim 12, further comprising forming a light absorbing layer between the stepped structure and the first panel. The method of manufacturing the display module of claim 12, wherein the second frame further has a clamping portion, the clamping portion and the bearing portion together form a receiving groove, when assembling the first When the panel is to the second frame, an edge of the first panel is inserted into the receiving slot. The method for manufacturing a display module according to claim 20, further comprising providing a third adhesive layer between the clamping portion and the side wall portion.