CN106814484A - Display device - Google Patents

Abstract

A display device includes a first electronic module, a second electronic module and a joint. The first electronic module includes a first flexible circuit board. The first surface of the first flexible circuit board includes at least one first pad. The second electronic module The module is located below the first electronic module and includes a second flexible circuit board. The second flexible circuit board at least partially overlaps the first flexible circuit board. The second surface of the second flexible circuit board includes at least one second pad. The surface faces the first flexible circuit board, the outline of each first pad vertically projected on the second flexible circuit board at least partially overlaps or is adjacent to the corresponding second pad, and the connecting member is connected to the corresponding first pad respectively. With each second pad.

Description

display device

technical field

The present invention relates to a display device; specifically, the present invention relates to a liquid crystal display device.

Background technique

The flexible printed circuit board (FPCB) has the characteristics of being bendable and lightweight, which can effectively save the internal space of the display device and facilitate assembly, so it is widely used in the electrical connection of various components in the display device.

In the design of the current display device, after the assembly is completed, the conductive pads on the main flexible circuit board connected to the display panel and the conductive pads on the sub-flexible circuit board with light-emitting elements in the backlight module need to be soldered to each other to allow signal transmission to the light emitting element. However, in current display devices, the conductive pads on the main FPC and the conductive pads on the sub-FPC are arranged on the back side, and the two are connected by solder. When it is folded to the back of the display panel and the backlight module, the solder will face the backlight module. At this time, the corresponding part of the backlight module needs to be retreated, otherwise the components in the backlight module (such as the reflector in the backlight module) will be pushed up due to the severe interference of the solder. hurt. In another display device of the prior art, it is necessary to fold the secondary flexible circuit board to the main flexible circuit board for soldering. And the issue of tearing the main flex circuit board.

Contents of the invention

An object of the present invention is to provide a display device with a simpler production process and better production efficiency.

The present invention proposes a display device, including a first electronic module, a second electronic module, and a joint member. The first electronic module includes a first flexible circuit board, and the first surface of the first flexible circuit board includes at least one first pad. The second electronic module is located below the first electronic module and includes a second flexible circuit board, the second flexible circuit board at least partially overlaps with the first flexible circuit board, and the second surface of the second flexible circuit board includes at least one second pad , the second surface faces the first flexible circuit board, the outline of each first pad vertically projected on the second flexible circuit board overlaps or is at least partially adjacent to the corresponding second pads, and the joints are respectively connected to the corresponding first pads. A pad and each second pad.

According to the display device described in the embodiment of the present invention, each of the above-mentioned outlines has a first width w1 and a first central axis, each second pad has a second width w2 and a second central axis, and the first width w1 and the second width Both w2 are approximately equal to d, and the distance between the first central axis and the second central axis is less than d/2.

According to the display device described in the embodiment of the present invention, the above-mentioned first electronic module includes a display panel, and the display panel is connected to the first flexible circuit board.

According to the display device described in the embodiment of the present invention, the above-mentioned second electronic module includes a backlight module, and the backlight module includes at least one light source disposed on the second flexible circuit board.

According to the display device described in the embodiment of the present invention, the above-mentioned first flexible circuit board includes a first signal connection part, the first pad is located at the first signal connection part, and the above-mentioned second flexible circuit board includes a second signal connection part, The second pad is located at the second signal connection part, and the first signal connection part and the second signal connection part are disposed under the display panel.

According to the display device described in the embodiment of the present invention, the above-mentioned second signal connection part is at least partially located outside the range where the first flexible circuit board is vertically projected on the second flexible circuit board.

According to the display device described in the embodiment of the present invention, the above-mentioned first flexible circuit board has a gap near the display panel, and the second pad is at least partially located in the gap.

According to the display device described in the embodiment of the present invention, the above-mentioned second signal connection part at least partially protrudes outside the first flexible circuit board.

According to the display device described in the embodiment of the present invention, the above-mentioned second flexible circuit board is completely located on the opposite side of the first surface of the first flexible circuit board.

According to the display device described in the embodiment of the present invention, the above-mentioned bonding member is conductive glue, solder or conductive tape.

The above description of the content of the present invention and the following description of the implementation are used to demonstrate and explain the principle of the present invention, and to provide further explanation of the patent application scope of the present invention.

Description of drawings

FIG. 1 is an exploded view of components of an embodiment of a display device of the present invention;

2 is a schematic diagram of an embodiment of a combination of a first electronic module and a second electronic module;

3 is a side view of an embodiment of a display device of the present invention;

4 is a schematic diagram of an embodiment in which the first flexible circuit board and the second flexible circuit board are partially bent downward;

Fig. 5 is another embodiment of the display device of the present invention;

6a-6c are schematic diagrams showing the relative positions of the outline and the second pad;

Explanation of reference signs:

100 first electronic module

110 First flexible circuit board

110a first surface

111 First signal connection part

120 display panel

130 First Pad

130’ profile

150 fittings

160 notches

200 Second electronic module

210 Second flexible circuit board

210a Second Surface

211 Second signal connection part

214 light emitting elements

220 light guide plate

230 Second pad

detailed description

The present invention provides a display device. In a preferred embodiment, the display device of the present invention includes a liquid crystal display device. Liquid crystal display devices generally refer to display devices using liquid crystal panels, including household LCD TVs, LCD monitors for personal computers and laptops, smart phones, portable Internet devices, and liquid crystal display screens for digital cameras. However, in different embodiments, the present invention may also include OLED panels or other panel display devices.

In the embodiment shown in FIG. 1 , the display device includes a first electronic module 100 and a second electronic module 200 ; the first electronic module 100 is preferably at least partially overlapped with the second electronic module 200 . In this embodiment, the first electronic module 100 is a display panel module, preferably a liquid crystal panel module; the second electronic module 200 is a backlight module and is disposed below the first electronic module 100 . However, in different embodiments, the first electronic module 100 can also be an organic light emitting diode panel module or other panel modules; Overlapping modules.

As shown in FIGS. 1 and 3 , the first electronic module 100 includes a display panel 120 and a first flexible circuit board 110 . In this embodiment, the first flexible circuit board 110 is a flexible circuit board, which is connected to the display panel 120 and extends outward from the peripheral area of the display panel 120 for connecting with an external signal source to transmit signals to the display panel 120 . However, in different embodiments, the first flexible circuit board 110 may also be replaced by a cable, a film or other components with similar functions. The first flexible circuit board 110 has a first signal connection portion 111 and a first surface 110a, and at least one first pad 130 is disposed on the first signal connection portion 111 and the first surface 110a.

In this embodiment, the second electronic module 200 is a backlight module, including a second flexible circuit board 210 , and at least one light emitting element 214 , such as a light emitting diode, is disposed on the second flexible circuit board 210 . However, in different embodiments, the light emitting element 214 can also adopt other light sources such as lamp tubes, etc., and the lamp tube and the second flexible circuit board 210 are connected to each other, for example.

1 and 3, the second electronic module 200 also includes a light guide plate 220 located next to the second flexible circuit board 210, that is, the second flexible circuit board 210 and the parallel light guide plate 220 together form a backlight module and are arranged on the The bottom of the first electronic module 100 is used to provide the backlight required by the display panel 120 in the first electronic module 100 . In other embodiments, the second electronic module 200 further includes a reflective sheet (not shown) located below the light guide plate 220 and an optical film (not shown) located above the light guide plate 220 . In addition, in other embodiments, the second electronic module 200 includes light-emitting elements (not shown) arranged in a matrix and distributed directly under the display panel 120, so as to form a direct-type backlight module without using the light guide plate 220. .

In this embodiment, the second flexible circuit board 210 is a flexible circuit board located under the light emitting element 214 for connecting with an external signal source to transmit the signal to the light emitting element 214 . However, in different embodiments, the second flexible circuit board 210 may also be formed by wires, films or other components with similar functions. The second flexible circuit board 210 is a flexible circuit board, and its extension direction is substantially parallel to the extension direction of the first flexible circuit board 110 and at least partially overlaps. The second flexible circuit board 210 includes a second signal connection portion 211, the second pad 230 is located on the second signal connection portion 211, and the second pad 230 is located on the second surface 210a of the second flexible circuit board 210; the second surface 210a faces the first flexible circuit board 110, that is, the first surface 110a and the second surface 210a both face the same direction.

As shown in FIGS. 2 and 3 , the second signal connection portion 211 is at least partially located outside the range of the vertical projection of the first flexible circuit board 110 on the second flexible circuit board 210, that is, the second signal connection portion 211 protrudes at least partially Outside the first flexible circuit board 110 . The bonding element 150 is respectively connected to each corresponding first pad 130 and each second pad 230 . The bonding member 150 is, for example, conductive glue, solder or conductive tape, that is, each first pad 130 and each second pad 230 are coupled to each other by welding or adhesive connection. As far as the welding method is concerned, it may preferably include pull welding, laser spot welding and other connection methods with the same technical effect.

In this embodiment, the first flexible circuit board 110 partially overlaps the second flexible circuit board 210 , and the second flexible circuit board 210 is completely located on the opposite side of the first surface 110 a of the first flexible circuit board 110 . The first signal connection portion 111 is adjacent to or at least partially overlaps with the second signal connection portion 211 , and is disposed on the corresponding first pad 130 and second pad 230 on the first signal connection portion 111 and the second signal connection portion 211 is an electrical connection. Through the electrical connection between the corresponding first signal connection part 111 and the second signal connection part 211 , the signal sent by the signal source can be transmitted to the first pad 130 on the first signal connection part 111 via the first flexible circuit board 110 , and then transmitted to the second pad 230 on the second signal connection portion 211 via the first pad 130 on the first signal connection portion 111 . -

As shown in FIG. 4 , and please refer to FIG. 3 , after the first flexible circuit board 110 and the second flexible circuit board 210 are electrically connected by the bonding member 150, they are partially bent and laminated on the display panel 120 and the light guide plate 220. Below, that is, the first signal connection part 111 and the second signal connection part 211 are superimposed on the bottom of the display panel 120 and the light guide plate 220 and retracted into the coverage of the first electronic module 100, while the bonding member 150 is located away from the second One side of the second electronic module 200 . The second flexible circuit board 210 is completely located inside the first flexible circuit board 110 , that is, the second flexible circuit board 210 is completely located on the opposite side of the first surface 110 a of the first flexible circuit board 110 . Through the above design, the second flexible circuit board 210 of this embodiment does not need to be folded from bottom to top to the first flexible circuit board 210, which can effectively avoid the problem of the second flexible circuit board being broken or the first flexible circuit board being torn. .

FIG. 5 is another embodiment of the present invention. In this embodiment, the first flexible circuit board 110 has a notch 160 near the display panel 120, that is, in the direction y along the extending direction of the first flexible circuit board 110. The width of the first flexible circuit board 110 extending outward from the display panel 120 changes from narrow to wide to form a gap 160 . In other words, the first flexible circuit board 110 is narrower near the display panel 120 to form the gap 160 , and the second pad 230 is at least partially located in the gap 160 . That is to say, the second signal connection portion 211 of the second flexible circuit board 210 is at least partially located outside the range of the vertical projection of the first flexible circuit board 110 on the second flexible circuit board 210 , so that the second pad 230 is exposed from the gap 160 .

As shown in FIG. 6 , it is a schematic diagram of relative positions of the contour 130 ′ of the first pad 130 vertically projected on the second surface 210 a and the corresponding second pad 230 . Please refer to FIG. 6a, the contours 130' on the second surface 210a are in one-to-one correspondence with and adjacent to the second pads 230, each contour 130' has a first width w1 and a first central axis a1, and each second pad 230 has a second width w2 and a second central axis a2, the first width w1 and the second width w2 are substantially equal to d, and the corresponding outline 130 and the second pad 230, the first central axis a1 and the second The distance of the central axis a2 is smaller than d/2, for example, 0. Please refer to FIG. 6b, the profile 130' of the second surface 210a is adjacent to but not in contact with the corresponding second pad 230 and has an offset in the x direction, that is, the corresponding profile 130' and the first pad 230 The central axis a1 has an offset distance s from the second central axis a2, and s is smaller than d/2. Please refer to FIG. 6c, wherein the contour 130' and the corresponding second pad 230 at least partially overlap each other.

The present invention has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equivalent arrangements included in the concept and scope of the claims are included in the scope of the present invention.

Although the present invention is disclosed as above with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any person familiar with similar skills may make some changes and modifications without departing from the concept and scope of the present invention. Therefore, the present invention The scope of patent protection shall be defined by the claims attached to this specification.

Claims (10)

1. a kind of display device, including：

One first electronic module, including one first flexible PCB, a first surface of first flexible PCB are included at least One first connection pad；

One second electronic module, including one second flexible PCB, second electronic module are arranged at first electronic module Lower section, second flexible PCB be it is least partially overlapped with first flexible PCB, the one of second flexible PCB Two surfaces include at least one second connection pad, and the second surface is towards first flexible PCB, and respectively first connection pad is vertically thrown Shadow is least partially overlapped or adjacent with corresponding respectively second connection pad in a profile of the second surface；And

An at least fastener, connects corresponding respectively first connection pad and respectively second connection pad respectively.

2. display device as claimed in claim 1, wherein, respectively the profile has one first width w1 and one first central shaft, Respectively second connection pad has one second width w2 and one second central shaft, and the first width w1 and second width w2 are substantially etc. In d, and first central shaft is less than d/2 with the distance of second central shaft.

3. display device as claimed in claim 1, wherein, second flexible PCB is fully located at first flexible PCB The first surface opposition side.

4. display device as claimed in claim 1, wherein, the fastener is conducting resinl, scolding tin or conductive tape.

5. display device as claimed in claim 1, wherein, second electronic module includes a backlight module, the backlight module Including an at least light source, it is arranged on second flexible PCB.

6. display device as claimed in claim 1, wherein, first electronic module includes a display panel, the display panel Connect first flexible PCB.

7. display device as claimed in claim 6, wherein, first flexible PCB at the display panel in having one Breach, second connection pad is at least partially disposed in the breach.

8. display device as claimed in claim 6, wherein, first flexible PCB includes one first signal connecting element, should First connection pad is located at first signal connecting element, and second flexible PCB includes a secondary signal connecting portion, second connection pad Positioned at the secondary signal connecting portion, first signal connecting element and the secondary signal connecting portion be disposed on the display panel it Lower section.

9. display device as claimed in claim 8, wherein, the secondary signal connecting portion is at least partially disposed at first flexible electrical Road plate upright projection is in outside the scope of second flexible PCB.

10. display device as claimed in claim 6, wherein, it is first soft that the secondary signal connecting portion at least partly protrudes from this Outside property circuit board.