TWI486667B - Liquid crystal display and assembling method thereof - Google Patents

Description

Liquid crystal display device and assembly method thereof

The present invention relates to a display device and an assembly method thereof, and more particularly to a liquid crystal display device and an assembly method thereof.

Today's social multimedia technology is quite developed, and most of them benefit from the advancement of semiconductor components or display devices. As for the display device, a liquid crystal display (LCD) having superior characteristics such as high image quality, good space utilization efficiency, low power consumption, and no radiation has gradually become the mainstream of the market. Generally, a liquid crystal display device is composed of a liquid crystal display panel, a backlight module, a frame, and the like.

FIG. 1 is a schematic exploded view of a conventional liquid crystal display device. Referring to FIG. 1 , the conventional liquid crystal display device 100 includes a display device front frame 120 , which is a front surface of the liquid crystal display device 100 . Generally, an operation button for operating the liquid crystal display device 100 , and a display device back cover 122 are disposed. For the appearance of the rear surface of the liquid crystal display device 100, a supporting member is generally disposed to support the liquid crystal display device on a plane or on the wall surface. And a display module 110 disposed between the display device back cover 122 and the display device front frame 120. The display module 110 includes a front panel 112 of the panel module, a rear cover 114 of the panel module, and a backlight module 116 and a liquid crystal display panel 118 disposed between the front panel 112 of the panel module and the rear cover 114 of the panel module. The backlight module 114 is mainly used for accommodating the backlight module 116 and the liquid crystal display panel 118, and the backlight module 116 further includes a light source and an optical film. In addition, a rotating member 130 is further included between the circuit device protection cover 124 and the panel module rear cover 114 to lock components such as the signal control circuit board 126 and the power supply circuit board 128 to the liquid crystal display device 100.

Generally, in the assembly process of the liquid crystal display device 100, the backlight module 116, the liquid crystal display panel 118, the panel module front frame 112, and the panel module back cover 114 are assembled into the display module 110 by the panel manufacturer. That is, the panel module front frame 112 and the panel module back cover 114 jointly hold the backlight module 116 and the liquid crystal display panel 118 to form the display module 110. Thereafter, the panel factory transports the assembled display module 110 to the system factory, and uses the relay 130 to lock the signal control circuit board 126 and the power circuit board 128 to the display module 110. Next, components such as the display device front frame 120, the display device rear cover 122, and the circuit device protective cover 124 are continuously assembled to constitute the liquid crystal display device 100.

In the above assembly process, the panel factory must first be assembled into the display module 110. Then, the assembled display module 110 is transported to the system factory to complete the assembly of the liquid crystal display device 100. In addition, in order to lock the signal control circuit board 126 and the power circuit board 128 to the display module 110, it is necessary to add the transfer member 130.

In this way, at least four or more members such as the front frame and the rear cover are required to be assembled into the liquid crystal display device 100. Therefore, the conventional liquid crystal display device 100 requires a large number of molds to be used to fabricate a plurality of front and back covers, and the assembly process is rather complicated. Therefore, the assembly cost of the liquid crystal display device 100 cannot be lowered, and the assembly efficiency cannot be effectively improved.

The invention provides a liquid crystal display device, which directly integrates the back cover of the display device and the back cover of the panel module to form a new integrated back cover to simplify the component design of the liquid crystal display device.

The invention provides a method for assembling a liquid crystal display device, which reduces assembly cost, simplifies the production process and effectively improves assembly efficiency.

The invention provides a liquid crystal display device comprising a back cover, a signal control module, a light source, a pair of carriers, a plurality of optical films, a display panel and a front frame. The back cover includes a main board and a first surrounding wall. The main board has an inner side and an outer side, and the first surrounding wall is vertically protruded from the first side of the main board.

Here, the signal control module is disposed on the outer side of the main board. The line source is disposed on the inner side, and the light sources may be line sources, and are substantially parallel to each other and each line source has opposite ends. The carrier is disposed on the first side and opposite to each other, wherein each carrier has a plurality of openings and a first stepped load bearing structure, and the opening faces the main board to accommodate the end of the line light source, and the first stepped load bearing structure is located on the bearing Keep away from one side of the motherboard.

In addition, the optical film is disposed on the first stepped load-bearing structure of the carrier and a portion of the first surrounding wall. The display panel is disposed on the first stepped load-bearing structure of the carrier and a partial area of the first surrounding wall, and the display panel is located on a side of the optical film away from the main board. The front frame is locked to the rear cover and holds the display panel and the carrier together with the first surrounding wall.

In an embodiment of the invention, the motherboard has a rectangular boss and a plurality of wire receiving portions located in a region surrounding the first surrounding wall, and the wire receiving portion is located on opposite sides of the rectangular boss and Corresponds to the end of the line source. In addition, the liquid crystal display device further includes at least one reflective sheet disposed on the rectangular boss and covering at least the wire receiving portion. Further, the rectangular boss forms a recess on the second side of the main board, and the signal control module is locked in the recess, for example. At this time, the liquid crystal display device may further include a second surrounding wall surrounding the edge of the groove. The second surrounding wall has, for example, a plurality of heat dissipation holes.

In an embodiment of the invention, the liquid crystal display device further includes a wall back cover for covering the signal control module of the main board. In addition, the liquid crystal display device further includes a foot seat disposed on a side of the hanging wall back cover away from the front frame. The foot and the wall back cover can be integrally formed.

In an embodiment of the invention, the first surrounding wall has two protruding platforms, so that the carrier is disposed on the two protruding platforms, and the end of the line light source is sandwiched between the carrier and the two protruding platforms. .

In an embodiment of the invention, the first stepped load-bearing structure of each of the carriers has a first step and a second step. The first order is relatively close to the main board, and the optical film is placed on the first stage, and the display panel is placed on the second stage.

In an embodiment of the invention, the first surrounding wall has a plurality of second stepped load-bearing structures of parallel line light sources, and the second stepped load-bearing structure and the first step-shaped load-bearing structure jointly carry the optical film And a display panel. In practice, each of the second stepped load-bearing structures may have a first order and a second order. The first order is relatively close to the main board, and the optical film is placed on the first stage, and the display panel is placed on the second stage.

In an embodiment of the invention, the liquid crystal display device further includes a plurality of support structures. The support structure is disposed in the rectangular boss to support the line source and the optical film. The support structure can be integrally formed with the back cover. Specifically, the support structure includes a plurality of lamp tube holders and a plurality of support columns, wherein the lamp tubes hold the line light source and the support columns support the optical film.

In an embodiment of the invention, the line source is a plurality of cold cathode fluorescent tubes.

In an embodiment of the invention, the material of the back cover is a reflective material for reflecting the light of the line source.

In an embodiment of the invention, the display panel has a liquid crystal display panel and a control circuit board, and the control circuit board is bent from an edge of the liquid crystal display panel to the outside of the first surrounding wall, and is locked in the first One around the wall.

In an embodiment of the invention, the liquid crystal display device further includes at least one shock absorbing member disposed between the display panel and the front frame. For example, the shock absorbing member is a sponge strip, a plastic strip or a rubber strip.

The present invention further provides a method of assembling a liquid crystal display device, the steps of which are as follows. A back cover is first provided that includes a main board and a first surrounding wall. The main board has a first side and a second side opposite to each other, and the first surrounding wall is vertically protruded from the first side of the main board. Next, a plurality of line sources are disposed on the first side of the main board, wherein the line sources are substantially parallel to each other and each line source has opposite ends.

Then, a pair of carriers are used to hold the line source between the back cover and the carrier. In practice, the carriers are opposite each other, and each carrier has a plurality of openings and a first stepped load bearing structure. In addition, the opening faces the main board to accommodate the end of the line source, and the first stepped carrier structure is located on a side of the carrier away from the main board.

Thereafter, a plurality of optical films and a display panel are disposed on the first stepped load-bearing structure of the carrier and a portion of the first surrounding wall. Wherein, the display panel is located on one side of the optical film away from the main board. Next, a front frame is locked to the back cover, and the front frame and the first surrounding wall hold the display panel and the carrier together. Then, a signal control module is locked to the second side of the motherboard.

In an embodiment of the present invention, before the plurality of line light sources are disposed on the first side of the main board, the at least one reflective sheet is disposed on the first side of the main board.

In an embodiment of the present invention, after the locking signal control module is disposed on the second side of the main board, the signal control module of the main board is covered by a hanging wall cover. In addition, after the signal control module is covered by a hanging wall cover, the footrest can be locked on the side of the front wall of the hanging frame.

In an embodiment of the present invention, the method for assembling a liquid crystal display device, wherein the first stepped load-bearing structure of each carrier has a first step and a second step, and the first step is relatively close to the main board. At this time, the method of arranging the optical film and the display panel includes placing the optical film on the first step and placing the display panel on the second step.

In an embodiment of the invention, the method for assembling a liquid crystal display device, wherein the first surrounding wall has a plurality of second stepped load-bearing structures of parallel line light sources, and the second stepped load-bearing structure has a first step and A second order, and the first order is relatively close to the main board. At this time, the method of arranging the optical film and the display panel includes placing the optical film on the first step and placing the display panel on the second step.

The invention further provides a liquid crystal display device comprising a back cover, a signal control module, at least one line light source and a front frame. The back cover has a concave structure and an inner convex structure, and the back cover has a first side and a second side opposite to each other. The concave structure is a boss and is located on the first side of the back cover, and the boss has a plurality of support structures. The inner convex structure is a groove and is located on the second side of the back cover. Here, the signal control module is disposed in the groove. The line sources are disposed on the bosses and are substantially parallel to each other and have opposite ends. The front frame is locked to the back cover and holds the display panel and the carrier together with the back cover.

In an embodiment of the invention, the rear cover further has a first surrounding wall. The first surrounding wall surrounds the boss to form a plurality of wire accommodating portions, and the wire accommodating portion is located on opposite sides of the boss and corresponds to an end portion of the line source.

In an embodiment of the invention, the liquid crystal display device further includes a wall back cover for covering the signal control module.

In an embodiment of the invention, the liquid crystal display device further includes a foot disposed on a side of the front wall away from the front frame.

In an embodiment of the invention, the foot base is integrally formed with the wall back cover.

In an embodiment of the invention, the liquid crystal display device further includes a pair of carriers disposed on the first side and facing each other. Here, each carrier has a plurality of openings and a first stepped load bearing structure. The opening faces the rear cover to receive the end of the line source, and the first stepped bearing structure is located on a side of the carrier away from the back cover. In addition, the first stepped load-bearing structure of each of the above-mentioned carriers has a first step and a second step, and the first step is relatively close to the back cover, where the optical film is placed on the first step, and the display panel Placed on the second stage.

In an embodiment of the invention, the support structure is integrally formed with the boss.

In an embodiment of the invention, the support structure includes a plurality of tube clamps and a plurality of support columns. The lamp holder clamps the line source, and the support column supports the optical film.

In an embodiment of the invention, the line source is a plurality of cold cathode fluorescent tubes.

In an embodiment of the invention, the material of the back cover is a reflective material for reflecting the light of the line source.

In an embodiment of the invention, the liquid crystal display device further includes at least one shock absorbing member disposed between the display panel and the front frame.

In an embodiment of the invention, the shock absorbing member is a sponge strip, a plastic strip or a rubber strip.

In an embodiment of the invention, the liquid crystal display device further includes at least one reflective sheet disposed on the boss and covering at least the wire receiving portion.

In an embodiment of the invention, the liquid crystal display device further includes a second surrounding wall surrounding the edge of the groove.

In an embodiment of the invention, the second surrounding wall has a plurality of heat dissipation holes.

In an embodiment of the invention, the first surrounding wall has two protruding platforms, so that the carrier is disposed on the two protruding platforms, and the ends of the line light source are sandwiched between the carrier and the two protruding platforms. between.

In an embodiment of the invention, the first surrounding wall has a plurality of second stepped load-bearing structures parallel to the line source. The second stepped load bearing structure and the first stepped load bearing structure jointly carry the optical film and the display panel.

In an embodiment of the invention, each of the second stepped load-bearing structures has a first step and a second step, wherein the first step is relatively close to the back cover. The optical film is placed on the first step and the display panel is placed on the second step.

In an embodiment of the invention, the display panel has a liquid crystal display panel and a control circuit board, and the control circuit board is bent from an edge of the liquid crystal display panel to the outside of the first surrounding wall, and is locked in the first One around the wall.

Based on the above, the back cover of the liquid crystal display device of the present invention integrates the functions of the back cover of the display device and the back cover of the panel module, that is, the back cover of the present invention can be used to lock the control circuit module and can also be used for receiving LCD module. In this way, the liquid crystal display device using the integrated back cover of the present invention requires fewer components for assembly, can effectively reduce assembly costs, simplify the production process, and effectively improve assembly efficiency.

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

2 is an exploded view of a liquid crystal display device according to an embodiment of the present invention. Referring to FIG. 2 , the liquid crystal display device 200 includes a signal control module 310 , a rear cover 210 , a plurality of line light sources 230 , a pair of carriers 240 , a plurality of optical films 250 , and a display panel 260 . And a front frame 270 and other components.

The liquid crystal display device 200 of the present embodiment is such that the line light source 230, the carrier 240, the optical film 250, the display panel 260, and the front frame 270 are sequentially assembled to the rear cover 210. Moreover, the signal control module 310 is disposed on the other side of the rear cover 210. Further, the rear cover 210 is, for example, an integrally formed plastic case. Compared with the conventional liquid crystal display device 100, at least four or more front and rear covers are required to be assembled into the liquid crystal display device 100. The rear cover 210 of the present embodiment directly integrates the display device back cover 122 and the panel module. The function of the rear cover 114 can effectively reduce the number of components used. In addition, the assembly method of this embodiment is also simplified.

In other words, in addition to the design of the lock control signal module 310, the cover 210 of the present embodiment further provides a related structural design of the components such as the line light source 230, the optical film 250, and the display panel 260.

In general, the liquid crystal display device 200 of the present embodiment is, for example, a liquid crystal television. The liquid crystal display device 200 of the present embodiment may further include a wall back cover 320 covering the signal control module 310 on the back cover 210. The signal control module 310 may include a power module and an image processing module, and the power module The group may further include a power conversion mechanism, such as a power conversion module that converts alternating current into direct current or converts direct current into alternating current. For example, the signal control module 310 can be a combination of components such as a video processing circuit (video PCB), a power supply circuit (power PCB), and an inverter (inverter PCB), and a power supply circuit board (power PCB) and a power supply frequency conversion. The inverter PCB can also be configured on the same board, which has the advantage of saving space. When the signal control module 310 is faulty, the wall back cover 320 can be directly removed to repair the signal control module 310, thereby increasing the convenience of use of the liquid crystal display device 200. In essence, the liquid crystal display device 200 additionally includes a tripod 330 that is locked to the side of the wall back cover 320 away from the front frame 270. Of course, when the liquid crystal display device 200 is actually used, the liquid crystal display device 200 can be detached from the wall or assembled at a specific position according to the needs of the user. In addition, in other embodiments, the wall back cover 320 and the stand 330 may also be an integrally formed design.

In the embodiment, the display panel 260 includes, for example, a liquid crystal display panel 262 and a control circuit board 264. When the liquid crystal display device 200 is assembled, the display panel 262 may be sandwiched between the front frame 260 and the carrier 240, and the control circuit board 264 may be bent from one edge of the display panel 262 to the outside of the rear cover 210. That is, the control circuit board 264 is bent to the side of the rear cover 210 and locked thereto. Of course, the design of the control circuit board 264 is for example only in this embodiment. In other embodiments, the display panel 260 does not necessarily have the control circuit board 264.

In addition, the liquid crystal display device 200 further includes at least one shock absorbing member (not shown) disposed between the display panel 260 and the front frame 270. That is, the front frame 270 contacting the edge of the display panel 260 may be provided with a shock absorbing member (not shown) to avoid damage to the display panel 260 by collision between the display panel 260 and the front frame 270. In addition, the configuration of the shock absorbing member (not shown) can make the display panel 260 more securely held between the front frame 270 and the carrier 240 and between the front frame 270 and the rear cover 210. For example, the shock absorbing member (not shown) may be a resilient and absorbable external force member such as a sponge strip, a plastic strip or a rubber strip. Of course, a cover glass 280 can be disposed between the front frame 270 and the display panel 260 to protect the display panel 260, and the surface of the display panel 260 is prevented from being contaminated by foreign matter such as dust or particles to affect the display quality.

The liquid crystal display device 200 of the present embodiment is exemplified by a light source that directly enters light. Actually, the above-mentioned line light source 230 is, for example, a plurality of cold cathode fluorescent lamps arranged in parallel with each other. Each of the line sources 230 has a relatively high voltage end HV and a low voltage end LV. The high voltage end HV and the low voltage end LV are used herein for illustrative purposes only and are not intended to limit the biasing mode of the line source 230. In addition, the optical film 250 is, for example, a combination of a diffusion plate 252 and a plurality of diffusion sheets 254, wherein the optical film 250 is located on a side of the line source 230 away from the back cover 210. The optical film 250 may be, for example, a diaphragm design such as a cymbal or a brightness enhancement sheet that contributes to improving the light quality of the line source 230.

In general, in the liquid crystal display device 200, the line sources 230 must be evenly arranged to provide uniform light. At the same time, the optical film 250 and the display panel 260 must be fixedly disposed at a specific position to provide a good display effect. Therefore, the conventional design must use the additional frame design such as the front frame of the display module to assemble the display module and then assemble the device system, which complicates the assembly process. However, in this embodiment, only the design of the back cover 210 can be used to mount the components such as the line light source 230, the optical film 250, and the display panel 260 in a desired position. Therefore, the design of the back cover 210 of the present embodiment greatly simplifies the assembly method of the liquid crystal display device 200.

In detail, in order to replace the functions of the conventional multiple frames and to carry the line light source 230, the optical film 250 and the display panel 260, the present embodiment proposes, for example, the following structural design. 3A and 3B are schematic views showing one side of a back cover of the liquid crystal display device of FIG. 2. As shown in FIG. 3A to FIG. 3B, the back cover 210 includes a main board 212 and a first surrounding wall 214. The main board 212 has a first side S1 and a second side S2. Here, the first surrounding wall 214 is vertically protruded from the first side S1 of the main plate 212. It is to be noted that, in the area surrounding the first surrounding wall 214, the main board 212 has a rectangular boss 216 and a plurality of wire receiving portions 218, wherein the two wire receiving portions 218 are respectively located on the rectangular bosses. The opposite sides of 216 are examples. In practice, the wire accommodating portions 218 correspond to the positions of the high voltage end portion HV and the low voltage end portion LV of the line light source 230, respectively.

Referring to FIG. 2, FIG. 3A and FIG. 3B, further, the first surrounding wall 214 of the rear cover 210 has two protruding platforms 222a, 222b corresponding to the positions of the high voltage end HV and the low voltage end LV of the line light source 230. . That is, the two protruding platforms 222a, 222b are respectively located above the two wire receiving portions 218. In particular, in the present embodiment, the plane of the two protruding platforms 222a, 222b may just match the protruding height of the rectangular boss 216. That is, the rectangular boss 216 and the two protruding platforms 222a, 222b can provide a plane of equal height to carry the line source 230.

In other words, when the line source 230 is disposed on the back cover 210, the rectangular boss 216 and the two protruding platforms 222a, 222b can jointly carry the line source 230. In this way, the line light source 230 is prevented from being tilted or unstable, and the line source 230 can be prevented from being broken due to flexing and bending. In addition, in this embodiment, the carrier 240 is disposed on the two protruding platforms 222a and 222b, and the opposite end portions LV and HV of the line source 230 are clamped by the two protruding platforms 222a and 222b and the carrier 240. The plurality of wire accommodating portions 218 are respectively located on opposite sides of the rectangular boss 216 and correspond to the high voltage end portion HV and the low voltage end portion LV of the line light source 230. At this time, the high-voltage end portion HV of the line light source 230 and the wire connected to the low-voltage end portion LV can be placed in the wire accommodating portion 218.

Specifically, FIG. 4 is a partially enlarged schematic view of a carrier according to an embodiment of the present invention. Referring to FIG. 4, in practice, the carrier 240 is designed to have a plurality of openings M and a first stepped load-bearing structure L1. In particular, when the carrier 240 is mounted on the rectangular boss 216 illustrated in FIG. 3A and FIG. 3B , each opening M faces the main board 212 , and the first stepped bearing structure L1 is located away from the main board 212 . One side. In detail, the first stepped bearing structure L1 of each carrier 240 may be subdivided into a first step L11 and a second step L12 relatively far from the main board 212.

Similarly, referring to FIG. 3A and FIG. 3B, after the embodiment, the cover 210 has a second step similar to the first stepped load-bearing structure L1 on both sides of the first surrounding wall 214 in the parallel direction D. Carrying structure L2. In conjunction with the structural design of the first stepped load-bearing structure L1, the second stepped load-bearing structure L2 may subdivide the first step L21 and the second step L22 and face the rectangular boss 216. The heights of the first step L21 and the second step L22 of the second stepped load-bearing structure L2 respectively correspond to the heights of the first step L11 and the second step L12 of the first stepped load-bearing structure L. As such, when the carrier 240 is assembled to the rear cover 210, the first steps L11, L21 and the second orders L12, L22 respectively provide two parallel planes.

Under such a design, when the optical film 250 and the display panel 260 shown in FIG. 2 are assembled to the back cover 210 and the carrier 240, they can be respectively disposed in the first order L11, L21 and the second order L12, L22. on. That is, the display panel 260 is located on one side of the optical film 250 away from the main board 212. After the assembly of the liquid crystal display device 200 is completed, the optical film 250 and the display panel 260 may be respectively fixed in a region surrounded by the first surrounding wall 214 and the stepped load-bearing structures L1, L2 of the carrier 240. Therefore, the optical film 250 and the display panel 260 do not cause undue slippage or misalignment. In the present embodiment, only the front frame 270 and the first surrounding wall 214 need to be locked together, and the display panel 260 and the optical film 250 can be stably sandwiched therebetween. That is, the optical film 250 and the display panel 260 of the present embodiment have high stability and reliability.

Of course, the stepped load-bearing structures L1, L2 of the above design are for illustrative purposes only and are not intended to limit the invention. In the design of the back cover 210 of other embodiments, the inner side of the first surrounding wall 214 does not necessarily need to have the second stepped load bearing structure L2. That is to say, the display panel 260 and the optical film 250 can also be stably fixed in the area surrounded by the first surrounding wall 214 by using the first stepped supporting structure L1 in which the respective carriers 240 are matched with each other. In addition to carrying the optical film 250 and the display panel 260, it can be seen from FIG. 4 that the distance between the openings M of the carrier 240 can be adjusted according to different usage requirements. As such, the line source 230 will be snapped into the opening M of a particular pitch to provide evenly distributed light.

In addition, in FIG. 3A and FIG. 3B, in order to make the line light source 230 after the liquid crystal display device 212 is assembled, the lamps can be kept parallel to each other. In this embodiment, a plurality of lamp holders U are further designed. The lamp holder U is disposed on the rectangular boss 216 of the rear cover 210 to hold the line light sources 230. In other words, the lamp holder U is, for example, enclosed in a U shape, and the line light source 230 is disposed in the lamp holder U in the direction D illustrated in FIGS. 3A and 3B. Therefore, the design of the embodiment can further prevent the line light source 230 from being displaced, and avoid the situation that the line source 230 is placed in an incorrect position or the light is not uniform.

Furthermore, in order to prevent the optical film 250 from affecting the display quality of the liquid crystal display device 200 due to unintended deflection, the rectangular boss 216 of the present embodiment is further provided with a plurality of protruding support columns P. The support post P is used to support the optical film 250 to prevent the optical film 250 from being subjected to undesired deflection due to gravity or other external force, as shown in FIGS. 3A and 3B. In addition, the protrusion height of the plurality of lamp holders U for holding the line light source 230 may be designed to match the height of the support post P to maintain a proper gap between the optical film 250 and the line source 230. In the embodiment, the support structure (ie, the support post P and the lamp clip U) may be integrally formed with the rear cover 210. Of course, the support structure may also be an additional manufacturing and selectively retaining the support post P and the socket (not shown) of the lamp holder U on the rectangular boss 210 to determine whether to use the support column according to actual assembly requirements. P and tube clamp U.

Please continue to refer to FIG. 2, FIG. 3A and FIG. 3B simultaneously. In this embodiment, before the line source 230 is assembled, a reflective sheet 290 may be disposed on the rectangular boss 216 to increase the utilization rate of the line source 230. In particular, the reflective sheet 290 must at least cover the wire receiving portion 218 to prevent the transmission line placed in the wire receiving portion 218 from scattering the light of the line source 230, thereby causing uneven brightness of the display panel 260.

5A and 5B are schematic views showing the other side of the back cover of the liquid crystal display device of FIG. 2. In the present embodiment, the rectangular boss 216 of FIGS. 3A and 3B forms a recess 220 on the second side S2 of the main board 212, as shown in FIGS. 5A and 5B, but the above structural design is not intended to limit the present invention. .

Referring to FIG. 2, FIG. 5A and FIG. 5B, in the liquid crystal display device 200, the signal control module 310 can include a power module and an image processing module, and the power module can further include a power conversion mechanism, such as switching AC power. A direct current or a power conversion module that converts direct current into alternating current. For example, the signal control module 310 can be a combination of components such as a video processing circuit (video PCB), a power supply circuit (power PCB), and an inverter (inverter PCB), and a power supply circuit board (power PCB) and a power supply frequency conversion. The inverter PCB can also be configured on the same board, which has the advantage of saving space. For example, it is composed of at least one image processing and signal control circuit board PCB, a power inverter INV, and a plurality of signal transmission lines (not shown). In practice, the signal control module 310 is used to control the pixel image of the display panel 260 or the signal transmission of the liquid crystal display device 200. The image processing and signal control circuit board PCB is disposed in the recess 220 of the second side S2 of the main board 212, and is locked to the rear cover 210 through the locking member 300. In addition, the signal transmission line of the signal control module 310 can be disposed in the wire accommodating portion 218, and is connected to the image processing and signal control circuit board PCB by a plurality of through holes H1 on the side of the rectangular boss 216 to enable the liquid crystal display device. The appearance of the 200 is more beautiful. Here, the design of the embodiment can at least save the use cost of the transfer member and the assembly step.

In addition, please refer to FIG. 2, FIG. 5A, and FIG. 5B simultaneously. In order to allow the heat generated by the signal control module 310 to be effectively dissipated, the second side S2 of the main board 212 of the rear cover 210 further includes a second surrounding wall 224 having a plurality of heat dissipation holes H2, which are disposed around the back cover. The edge of the groove 220 of 210. The second surrounding wall 224, which is disposed at the edge of the groove 220, can increase the space of the signal control module 310, and the plurality of heat dissipation holes H3 on the wall cover 320 can be further generated by the signal control module 310. The heat is effectively dissipated.

Further, in the embodiment, the back cover 210 is provided with a recess 220 for accommodating the signal control module 310, a rectangular bobbin 216 for carrying the line light source 230, the display panel 260, and a first surrounding wall 214. Therefore, the line light source 230 can be directly assembled to the back cover 210 without being carried by a conventional metal back plate. At the same time, the line source 230, the optical film 250 and the display panel 260 do not need to be held together by the conventional panel module front frame 112 and the panel module back cover 114 to form a separate display module 110 (as shown in FIG. 1). ). That is, the design of the embodiment can save the use cost and assembly steps of the metal back panel, the panel module back cover 114 and the panel module front frame 112.

2, FIG. 3A, FIG. 3B, FIG. 4, FIG. 5A and FIG. 5B, the assembling method of the liquid crystal display device 200 of the present embodiment is as follows: First, the rear cover 210 is provided. Then, the signal control module 310 is locked in the recess 220 of the back cover 210. Accordingly, the line light source 230 is mounted on the rectangular boss 216 of the back cover 210 and a partial area of the first surrounding wall 214. Thereafter, the line light source 230 is held between the back cover 210 and the carrier 240 by the carrier 240. Next, a plurality of optical films 250 and display panels 260 are mounted on the carrier 240 and a portion of the first surrounding wall 214. In addition, display panel 260 is held together with first surrounding wall 214 by front frame 270 such that display panel 260 is positioned between carrier 240 and front frame 270.

In other words, the assembly method of the liquid crystal display device 200 of the present embodiment is to sequentially assemble the signal control module 310, the line light source 230, the carrier 240, the optical film 250, the display panel 260, and the front frame 270 to the back cover. On the different sides of 210. Compared with the conventional liquid crystal display device 100, at least four or more front frames and back covers are required to be assembled into the liquid crystal display device 100, the assembly method of the present embodiment is simplified. It is worth mentioning that the step of locking the signal control module 310 can be performed after the front panel 270 is used to hold the display panel 260 together with the first surrounding wall 214. That is to say, the present invention can assemble the other side member after assembling the member on the side of the rear cover 210, without limiting which side member is to be assembled first.

Figure 6 is an exploded view of a reflective sheet and a back cover according to another embodiment of the present invention. Referring to FIG. 6, in the embodiment, the material of the back cover 210 is, for example, a reflective plastic material. Therefore, the rectangular boss 216 only needs to be matched with the two reflective sheets 290' covering the wire accommodating portion 218, so that the effect of the reflective sheet 290 in FIG. 2 can be achieved, and the use cost of the reflective sheet 290' can be saved. It is to be noted that the size of each of the reflection sheets 290' is only slightly larger than the bottom area of each of the wire accommodating portions 218.

In general, regardless of which of the above designs is used for the liquid crystal display device 200, the rear cover 210 and the carrier 240 can provide a proper positioning structure to configure the line light source 230, the optical film 250, and the display panel 260 in the correct position. . Therefore, the line light source 230, the optical film 250, and the display panel 260 are not displaced during transportation or movement. In addition, the carrier 240 and the first surrounding wall 214 further provide stepped bearing structures L1, L2 to avoid improper contact or misalignment of the optical film 250 and the display panel 260, thereby causing a poor display effect. That is to say, the liquid crystal display device 200 has good quality and display effects in addition to the advantages of simplified assembly method and reduced cost of use.

In summary, the conventional liquid crystal display device must be assembled in advance with the display module, and then assembled with components such as the display device front frame, the signal control module, the rotating member, and the plurality of display device back covers. Therefore, in the past, a liquid crystal display device requires at least four or more front frames and a rear cover to be assembled into a liquid crystal display device, which simplifies the assembly process and increases the cost. The invention changes the structure design of the back cover and matches the carrier with the stepped load-bearing structure, so that the components such as the signal control module, the line light source, the optical film and the display panel can be directly arranged on the back cover in sequence, which simplifies A method of assembling a liquid crystal display device. In short, the liquid crystal display device of the present invention and the method of assembling the same have at least the advantages of simple assembly process and reduced material cost.

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, 200. . . Liquid crystal display device

110. . . Display module

112. . . Panel module front frame

114. . . Panel module back cover

116. . . Backlight module

118. . . LCD panel

120. . . Display device front frame

122. . . Display device back cover

124. . . Circuit device protection cover

126. . . Signal control board

128. . . Power circuit board

130. . . Transfer

210. . . Back cover

212. . . Motherboard

214. . . First surrounding wall

216. . . Rectangular boss

218. . . Wire housing

220. . . Groove

222a, 222b. . . Projection platform

224. . . Second surrounding wall

230. . . Line source, cold cathode fluorescent tube set

240. . . Carrier

250. . . Optical diaphragm

252. . . Diffuser

254. . . Diffusion sheet

260. . . Display panel

262. . . LCD panel

264. . . Control board

270. . . Front frame

280. . . Protective glass

290, 290’. . . A reflective sheet

300. . . Locking member

310. . . Signal control module

320. . . Wall back cover

330. . . Tripod

PCB. . . Image processing and signal control board

INV. . . Power inverter

H1. . . Through hole

H2, H3. . . Vents

HV. . . High pressure end

LV. . . Low pressure end

U. . . Lamp clamp

M. . . Opening

L1, L2. . . Stepped load bearing structure

L11, L21. . . First order

L12, L22. . . Second order

D. . . direction

P. . . Support column

S1. . . First side

S2. . . Second side

FIG. 1 is a schematic exploded view of a conventional liquid crystal display device.

2 is an exploded view of a liquid crystal display device according to an embodiment of the present invention.

3A and 3B are schematic views showing one side of a back cover of the liquid crystal display device of FIG. 2.

4 is a partially enlarged schematic view of a carrier according to an embodiment of the present invention.

5A and 5B are schematic views showing the other side of the back cover of the liquid crystal display device of FIG. 2.

Figure 6 is an exploded view of a reflective sheet and a back cover according to another embodiment of the present invention.

200. . . Liquid crystal display device

210. . . Back cover

230. . . Line source

240. . . Carrier

250. . . Optical diaphragm

252. . . Diffuser

254. . . Diffusion sheet

260. . . Display panel

262. . . LCD panel

264. . . Control board

270. . . Front frame

280. . . Protective glass

290. . . A reflective sheet

300. . . Locking member

310. . . Signal control module

320. . . Wall back cover

330. . . Tripod

HV. . . High pressure end

LV. . . Low pressure end

H3. . . Vents

INV. . . Power inverter

PCB. . . Image processing and signal control board

Claims (46)

A liquid crystal display device comprising: a back cover comprising a main board and a first surrounding wall, the main board having an opposite first side and a second side, the first surrounding wall being perpendicular to the first side of the main board a signal control module is disposed on the second side of the motherboard, wherein the signal control module includes an image processing circuit board; at least one line light source is disposed on the first side, and the line sources are substantially Parallel to each other and each of the line light sources has opposite ends; a plurality of optical films disposed on a portion of the first surrounding wall; a display panel disposed on a portion of the first surrounding wall And the display panel is located on a side of the optical film away from the motherboard, the image processing circuit board is directly electrically connected to the display panel; a front frame is locked on the back cover and is common with the first surrounding wall The display panel and the pair of carriers are supported; and a back cover directly shields the signal control module and is directly exposed to the external environment. The liquid crystal display device of claim 1, wherein the main board has a rectangular boss and a plurality of wire receiving portions located in a region surrounding the first surrounding wall, and the wire receiving portions are located The opposite sides of the rectangular bosses correspond to the ends of the line sources. The liquid crystal display device of claim 2, further comprising at least one reflective sheet disposed on the rectangular boss and covering at least the wire receiving portions. The liquid crystal display device of claim 2, wherein the rectangular boss forms a recess on the second side of the main board, and the signal control module is locked in the recess. The liquid crystal display device of claim 4, further comprising a second surrounding wall surrounding the edge of the groove. The liquid crystal display device of claim 5, wherein the second surrounding wall has a plurality of heat dissipation holes. The liquid crystal display device of claim 1, further comprising a foot fixed to the side of the back cover away from the front frame. The liquid crystal display device of claim 7, wherein the foot is integrally formed with the back cover. The liquid crystal display device of claim 1, further comprising a pair of carriers disposed on the first side, the pair of carriers being opposite to each other, wherein each of the carriers has a plurality of openings and a first step And the openings are disposed on the main board to receive the ends of the line light sources, and the first stepped load-bearing structure is located on a side of the carrier away from the main board; the optical films are disposed on the And facing the first stepped load-bearing structures of the pair of carriers; and the display panel is disposed on the first stepped load-bearing structures of the pair of carriers. The liquid crystal display device of claim 9, wherein the first surrounding wall has two protruding platforms, so that the pair of carriers are disposed on The two protruded from the platform, and the ends of the line sources are sandwiched between the pair of carriers and the two protruding platforms. The liquid crystal display device of claim 9, wherein the first stepped load-bearing structure of each of the carriers has a first step and a second step, the first step being relatively close to the main board and the optical The diaphragm is placed on the first step, and the display panel is placed on the second step. The liquid crystal display device of claim 9, wherein the first surrounding wall has a plurality of second stepped load-bearing structures parallel to the line light sources, and the second stepped load-bearing structure and the first stepped shape The carrier structure collectively carries the optical film and the display panel. The liquid crystal display device of claim 12, wherein each of the second stepped load-bearing structures has a first step and a second step, the first step is relatively close to the main board and the optical films are placed on On the first step, the display panel is placed on the second step. The liquid crystal display device of claim 1, further comprising a plurality of supporting structures disposed on the rectangular boss to support the line light sources and the optical films. The liquid crystal display device of claim 14, wherein the support structures are integrally formed with the back cover. The liquid crystal display device of claim 14, wherein the support structures comprise a plurality of lamp tube clamps and a plurality of support columns, the lamp tube clamps holding the line light sources, and the support columns support the Some optical films. The liquid crystal display device of claim 1, wherein the line sources are a plurality of cold cathode fluorescent tubes. The liquid crystal display device of claim 1, wherein the back cover is made of a reflective material for reflecting the light of the line sources. The liquid crystal display device of claim 1, wherein the display panel has a liquid crystal display panel and a control circuit board, and the control circuit board is bent from the edge of the liquid crystal display panel to the first surrounding wall The outer side is fixed to the first surrounding wall. The liquid crystal display device of claim 1, further comprising at least one shock absorbing member disposed between the display panel and the front frame. The liquid crystal display device of claim 20, wherein the shock absorbing member is a sponge strip, a plastic strip or a rubber strip. A method of assembling a liquid crystal display device, comprising: providing a back cover, the back cover comprising a main board and a first surrounding wall, the main board having an opposite first side and a second side, the first surrounding wall being The first side of the main board is vertically protruded; a plurality of line light sources are disposed on the first side of the main board, wherein the line light sources are substantially parallel to each other and each of the line light sources has opposite ends; and the plurality of optical films are disposed And a display panel on a portion of the first surrounding wall, wherein the display panel is located on a side of the optical film away from the main board; a front frame is locked on the back cover, and the front The frame and the first surrounding wall together hold the display panel and the pair of carriers; and a signal control module is locked to the second side of the motherboard, wherein the signal control module includes an image processing circuit board, and Image processing circuit The board is directly connected to the display panel; and after the signal control module is locked to the second side of the main board, the back cover is used to cover the signal control module, wherein the back cover directly shields the signal control The module is directly exposed to the outside environment. The method of assembling a liquid crystal display device according to claim 22, wherein at least one reflective sheet is disposed on the first side of the main board before the plurality of line light sources are disposed on the first side of the main board. The method of assembling a liquid crystal display device according to claim 22, wherein after the signal control module is covered by a back cover, the foot cover is further locked to the side of the front cover away from the front frame. The method for assembling a liquid crystal display device according to claim 22, further comprising: holding the line light sources between the back cover and the pair of carriers by using a pair of carriers, wherein: the pair of carriers are opposite to each other Each of the carriers has a plurality of openings and a first stepped load-bearing structure, and the openings face the main board to receive the ends of the line light sources, and the first stepped load-bearing structure is located at the carrier One side of the main board; and the optical film and the display panel are disposed on the first stepped load-bearing structures of the pair of carriers. The method of assembling a liquid crystal display device according to claim 25, wherein the first stepped load-bearing structure of each of the carriers has a first step and a second step, the first step being relatively close to the main board. And the method of disposing the optical film and the display panel comprises placing the optical film on the first step and placing the display panel on the second step. The method of assembling a liquid crystal display device according to claim 25, wherein the first surrounding wall has a plurality of second stepped load-bearing structures parallel to the line light sources, and each of the second stepped load-bearing structures has a first a first order and a second step, the first order is relatively close to the main board, and the method of configuring the optical film and the display panel comprises placing the optical film on the first step, and the display panel Placed on the second step. A liquid crystal display device includes: a rear cover having a first side and a second side, wherein the first side is provided with a boss, and the boss has a plurality of supporting structures, and the convex Forming a groove on the second side; a signal control module is disposed in the recess, wherein the signal control module includes an image processing circuit board; at least one line light source is disposed on the boss, the at least one line source The two at least one line of light sources are substantially parallel to each other, and the at least one line of light sources have opposite ends, wherein the support structures of the protrusions are for supporting the at least one line of light sources; and a front frame is locked to the back cover and the back cover The display panel is commonly held, and the image processing circuit board is directly electrically connected to the display panel; and a back cover directly shields the signal control module and is directly exposed to the external environment. The liquid crystal display device of claim 28, wherein the rear cover further has a first surrounding wall, the first surrounding wall surrounding the boss to form a plurality of wire receiving portions, and the wire receiving portions The portions are located on opposite sides of the boss and correspond to the ends of the at least one line of light sources. The liquid crystal display device of claim 28, further comprising a foot disposed on a side of the back cover away from the front frame. The liquid crystal display device of claim 30, wherein the foot is integrally formed with the back cover. The liquid crystal display device of claim 28, further comprising a pair of carriers disposed on the first side, the pair of carriers being opposite to each other, wherein each of the carriers has a plurality of openings and a first step a bearing structure, the openings are facing the rear cover to receive the ends of the at least one line of light sources, and the first stepped bearing structure is located at a side of the carrier away from the back cover, wherein the carrier The first stepped load-bearing structure has a first step and a second step. The first step is relatively close to the back cover and the optical films are placed on the first step, and the display panel is placed on the second step. on. The liquid crystal display device of claim 28, wherein the support structures are integrally formed with the boss. The liquid crystal display device of claim 28, wherein the support structures comprise a plurality of lamp tube clamps and a plurality of support columns, the lamp tube clamps sandwich the at least one line of light sources, and the support columns support the optical Diaphragm. The liquid crystal display device of claim 28, wherein the at least one line source is a plurality of cold cathode fluorescent tubes. The liquid crystal display device of claim 28, wherein the back cover is made of a reflective material for reflecting light of the at least one line source. The liquid crystal display device of claim 28, further comprising at least one shock absorbing member disposed between the display panel and the front frame. The liquid crystal display device of claim 37, wherein the shock absorbing member is a sponge strip, a plastic strip or a rubber strip. The liquid crystal display device of claim 34, further comprising at least one reflective sheet disposed on the boss and covering at least the wire receiving portions. The liquid crystal display device of claim 34, further comprising a second surrounding wall surrounding the edge of the groove. The liquid crystal display device of claim 40, wherein the second surrounding wall has a plurality of heat dissipation holes. The liquid crystal display device of claim 29, further comprising a pair of carriers disposed on the first side, the pair of carriers facing each other, wherein each of the carriers has a plurality of openings and a first step The carrying structure has the openings facing the back cover to receive the ends of the at least one line source, and the first stepped bearing structure is located on a side of the carrier away from the back cover. The liquid crystal display device of claim 42, wherein the first surrounding wall has two protruding platforms, so that the pair of carriers are disposed on the two protruding platforms, and the ends of the at least one line source The portion is sandwiched between the pair of carriers and the two protruding platforms. The liquid crystal display device of claim 42, wherein the first surrounding wall has a plurality of second stepped load-bearing structures parallel to the line light sources, and the second stepped load-bearing structure and the first stepped shape The carrier structure collectively carries the optical film and the display panel. The liquid crystal display device of claim 44, wherein Each of the second stepped load-bearing structures has a first step and a second step, the first step is relatively close to the back cover and the optical film is placed on the first step, and the display panel is placed on the second On the order. The liquid crystal display device of claim 42, wherein the display panel has a liquid crystal display panel and a control circuit board, and the control circuit board is bent from the edge of the liquid crystal display panel to the first surrounding wall The outer side is fixed to the first surrounding wall.