TW201823812A - display device - Google Patents

Abstract

A display device is provided. The display device includes a first electronic module, a second electronic module, and a bonding element. The first electronic module has a first flexible wiring board, and at least a first pad is formed on a first surface of the first flexible wiring board. The second electronic module is under the first electronic module and has a second flexible wiring board, the second flexible wiring board at least partially overlaps the first flexible wiring board. At least a second pad is formed on a second surface of the second flexible wiring board, and the second surface faces the first flexible wiring board. A outline that belong to the first pad projecting vertically on the second flexible wiring board at least partially overlaps or near to the corresponding second pad. The bonding element connects the corresponding first pad and the second pad.

Description

Display device

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

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. Therefore, it is widely used for the electrical connection of various components in the display device.

In the current display device design, after the assembly is completed, the conductive pads connected to the main flexible circuit board of the display panel and the conductive pads on the sub flexible circuit board provided with the light-emitting element in the backlight module are welded to each other so that the signal Passed to the light-emitting element. However, in the current display devices, the conductive pads on the main flexible circuit board and the conductive pads on the auxiliary flexible circuit board are provided on the back side, and the two are connected by solder. When the main flexible circuit board and the auxiliary flexible circuit board are turned together, When folded to the back of the display panel and backlight module, the solder will face the backlight module. At this time, the corresponding part of the backlight module must be conceded, otherwise the components in the backlight module (such as the backlight module) will be severely interfered by the solder (Reflective sheet). In another prior art display device, the sub flexible circuit board needs to be folded to the main flexible circuit board for soldering. This folding process not only consumes man-hours, but the sub flexible circuit board is easily damaged during folding and The main problem is the tearing of flexible circuit boards.

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

The invention provides a display device, which includes a first electronic module, a second electronic module, and a joint. The first electronic module includes a first flexible circuit board, and a first surface of the first flexible circuit board includes at least a first connection. 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 the first flexible circuit board, and the second surface of the second flexible circuit board includes at least one The second pad, the second surface of which faces the first flexible circuit board, the outline of each first pad vertically projected on the second flexible circuit board and the corresponding second pad at least partially overlap or are adjacent to each other, and the joints are respectively connected Corresponding first pads and second pads.

According to the display device according to the embodiment of the present invention, each of the contours 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 w2 is 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 according to the embodiment of the present invention, the first electronic module includes a display panel, and the display panel is connected to the first flexible circuit board.

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

According to the display device according to the embodiment of the present invention, the above-mentioned second signal connection portion is located at least partially outside a range where the first flexible circuit board is vertically projected onto the second flexible circuit board.

According to the display device according to the embodiment of the present invention, the 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 according to the embodiment of the present invention, the above-mentioned second signal connection portion protrudes at least partially beyond the first flexible circuit board.

According to the display device according to the embodiment of the present invention, the 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 according to the embodiment of the present invention, the above-mentioned bonding member is a conductive adhesive, a solder, or a conductive tape.

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

The present invention provides a display device. In a preferred embodiment, the display device of the present invention includes a liquid crystal display device. A liquid crystal display device refers to a display device using a liquid crystal panel, including a domestic liquid crystal television, a personal computer and a laptop computer's LCD monitor, a smart phone, a portable Internet device, and a digital camera's LCD screen. However, in different embodiments, the present invention may also include a display device of an organic light emitting diode panel or other panels.

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, and preferably a liquid crystal panel module; the second electronic module 200 is a backlight module and is disposed on the first electronic module. Below 100. However, in different embodiments, the first electronic module 100 may also be an organic light emitting diode panel module or other panel module; and the second electronic module 200 may be an electromagnetic touch sensing module or other and The first electronic module 100 is a module at least partially overlapping.

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 a peripheral area of the display panel 120 for connection 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 and includes a second flexible circuit board 210. 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 may also use other light sources such as a lamp, and the lamp and the second flexible circuit board 210 are connected to each other, for example.

Please refer to FIGS. 1 and 3. The second electronic module 200 further 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 light guide plate 220 in parallel form a backlight module and It is disposed below the first electronic module 100 to provide a backlight required for the display panel 120 in the first electronic module 100. In other embodiments, the second electronic module 200 further includes, for example, a reflective sheet (not shown) below the light guide plate 220 and an optical film (not shown) 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 directly below the display panel 120 to form a direct-type backlight without using the light guide plate 220. Module.

In this embodiment, the second flexible circuit board 210 is a flexible circuit board located below the light-emitting element 214 and is used to connect to an external signal source to transmit signals to the light-emitting element 214. However, in different embodiments, the second flexible circuit board 210 may also be formed of a cable, a thin film, or other components with similar functions. The second flexible circuit board 210 is a flexible circuit board, and its extending direction is substantially parallel to the extending 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 FIG. 2 and FIG. 3, the second signal connection portion 211 is at least partially outside the range where the first flexible circuit board 110 is vertically projected on the second flexible circuit board 210, that is, the second signal connection portion 211 is at least partially projected from Outside the first flexible circuit board 110. The bonding members 150 connect the corresponding first pads 130 and the second pads 230 respectively. The bonding member 150 is, for example, conductive glue, solder, or conductive tape, that is, the first pads 130 and the second pads 230 are coupled to each other in a connection manner such as welding or bonding. As far as the welding method is concerned, it may preferably include pull welding, laser spot welding and other connection methods with the same effect.

In this embodiment, the first flexible circuit board 110 and the second flexible circuit board 210 partially overlap, 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 and the second signal connection portion 211 are adjacent or at least partially overlapped, and are disposed on the corresponding first pads 130 and the second pads 230 on the first signal connection portion 111 and the second signal connection portion 211. Electrical connection. Through the electrical connection between the corresponding first signal connection portion 111 and the second signal connection portion 211, the signal sent by the signal source can be transmitted to the first pad on the first signal connection portion 111 through the first flexible circuit board 110. 130, and then transmitted to the second pad 230 on the second signal connection portion 211 through 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 overlapped on the display panel 120 and the light guide plate 220. Below, that is, the first signal connection portion 111 and the second signal connection portion 211 are superimposed under the display panel 120 and the light guide plate 220 and retracted into the coverage area of the first electronic module 100, and the joint member 150 is located away from 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. With the above design, the second flexible circuit board 210 in this embodiment does not need to be folded onto the first flexible circuit board 210 from bottom to top, which can effectively avoid the second flexible circuit board being damaged or the first flexible circuit board being torn. problem.

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 is changed from narrow to wide to form the notch 160. In other words, the width of the first flexible circuit board 110 is narrower near the display panel 120 to form the notch 160, and the second pad 230 is at least partially located in the notch 160. That is, the second signal connection portion 211 of the second flexible circuit board 210 is at least partially outside the range where the first flexible circuit board 110 is vertically projected onto the second flexible circuit board 210, so that the second pad 230 is exposed from the notch 160. .

As shown in FIG. 6, it is a schematic diagram of the relative positions of the outline 130 'of the first pad 130 vertically projected on the second surface 210a and the corresponding second pad 230. Please refer to FIG. 6a. The contours 130 'on the second surface 210a correspond to the second pads 230 and are adjacent to each other. 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 both substantially equal to d, and the corresponding contour 130 and the second pad 230, the first central axis a1 and the second The distance of the central axis a2 is less than d / 2, for example, 0. Please refer to FIG. 6b, the outline 130 'of the second surface 210a is adjacent to the corresponding second pad 230 but is not in contact and is offset in the x direction, that is, the corresponding outline 130' and the second pad 230 have the first The central axis a1 has an offset distance s from the second central axis a2, and s is less 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 related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equal settings included in the spirit and scope of the scope of patent application are all included in the scope of the present invention.

Although the present invention is disclosed in the foregoing preferred embodiments as above, it is not intended to limit the present invention. Any person skilled in similar arts can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of patent protection of an invention shall be determined by the scope of patent application attached to this specification.

100‧‧‧The first electronic module

110‧‧‧The first flexible circuit board

110a‧‧‧first surface

111‧‧‧First Signal Connection

120‧‧‧Display Panel

130‧‧‧The first pad

130’‧‧‧ contour

150‧‧‧Joint

160‧‧‧ gap

200‧‧‧Second Electronic Module

210‧‧‧Second flexible circuit board

210a‧‧‧Second surface

211‧‧‧Second signal connection section

214‧‧‧Light-emitting element

220‧‧‧light guide

230‧‧‧Second pad

FIG. 1 is an exploded view of components of an embodiment of a display device of the present invention; FIG. 2 is a schematic diagram of an embodiment of a combination of a first electronic module and a second electronic module; FIG. 3 is a side view of an embodiment of a display device of the present invention; A schematic diagram of an embodiment in which the first flexible circuit board and the second flexible circuit board are bent downward; FIG. 5 is another embodiment of the display device of the present invention; and FIGS. 6a-6c are schematic diagrams of the relative positions of the outline and the second pad;

Claims (10)

A display device includes: a first electronic module including a first flexible circuit board, a first surface of the first flexible circuit board including at least a first pad; a second electronic module including a first Two flexible circuit boards, the second electronic module is disposed below the first electronic module, the second flexible circuit board at least partially overlaps with the first flexible circuit board, and one of the second flexible circuit boards is second The surface includes at least one second pad, the second surface faces the first flexible circuit board, and a contour of each first pad perpendicularly projected on the second surface at least partially overlaps the corresponding second pad Or they are adjacent to each other; and at least one joint member is connected to each of the corresponding first pads and each of the second pads, respectively. The display device according to item 1 of the scope of patent application, wherein each of the contours has a first width w1 and a first central axis, and each of the second pads has a second width w2 and a second central axis, The first width w1 and the second width w2 are both substantially equal to d, and the distance between the first central axis and the second central axis is less than d / 2. The display device according to item 1 of the scope of patent application, wherein the second flexible circuit board is completely located on the opposite side of the first surface of the first flexible circuit board. The display device according to item 1 of the scope of patent application, wherein the bonding member is a conductive adhesive, a solder, or a conductive tape. The display device according to item 1 of the scope of patent application, wherein the second electronic module includes a backlight module, the backlight module includes at least one light source, and is disposed on the second flexible circuit board. The display device according to item 1 of the scope of patent application, wherein the first electronic module includes a display panel, and the display panel is connected to the first flexible circuit board. The display device according to item 6 of the scope of patent application, wherein the first flexible circuit board has a gap near the display panel, and the second pad is at least partially located in the gap. The display device according to item 6 of the scope of patent application, wherein the first flexible circuit board includes a first signal connection portion, the first pad is located at the first signal connection portion, and the second flexible circuit board includes a The second signal connection part, the second pad is located in the second signal connection part, the first signal connection part and the second signal connection part are disposed below the display panel. The display device according to item 8 of the scope of patent application, wherein the second signal connection portion is at least partially outside a range where the first flexible circuit board is perpendicularly projected onto the second flexible circuit board. The display device according to item 6 of the scope of patent application, wherein the second signal connection portion protrudes at least partially beyond the first flexible circuit board.