TWI598661B - display device - Google Patents

Description

Display device

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

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

At present, the design of the display device needs to be soldered to the conductive pads on the main flexible circuit board connected to the display panel and the conductive pads on the sub-soft circuit board provided with the light-emitting elements in the backlight module after the assembly is completed. Transfer to the light-emitting element. However, in the current display device, the conductive pads on the main flexible circuit board and the conductive pads of the sub-soft circuit board are disposed on the back side, and the two are connected by soldering, when the main flexible circuit board and the sub-soft circuit board are turned together. When folding to the back of the display panel and the backlight module, the solder will face the backlight module. At this time, the backlight module needs to be retracted. Otherwise, the components in the backlight module may be caused by the serious interference of the solder (for example, in the backlight module). Reflective film) top injury. In another prior art display device, the sub-flexible circuit board needs to be folded over to the main flexible circuit board for soldering, and the folding process is not only time-consuming but also prone to breakage of the sub-soft circuit board during the folding process and The main problem of flexible circuit board tearing.

It is an object of the present invention to provide a display device having a relatively simple production process and better production efficiency.

The present invention provides a display device including a first electronic module, a second electronic module, and a bonding component. The first electronic module includes a first flexible circuit board. The first surface of the first flexible circuit board includes at least one first connection. a second electronic module is disposed under the first electronic module and includes a second flexible circuit board, the second flexible circuit board at least partially overlapping the first flexible circuit board, and the second surface of the second flexible circuit board includes at least one a second pad, the second surface is opposite to the first flexible circuit board, and the first pad is vertically projected on the second flexible circuit board and at least partially overlaps or adjacent to the corresponding second pads, and the bonding components are respectively connected Corresponding to each of the first pads and the second pads.

According to the display device of the embodiment of the present invention, 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 Both w2 are substantially 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 of the embodiment of the 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 of the embodiment of the 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 of the embodiment of the present invention, 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 the 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 of the embodiment of the invention, the second signal connection portion is at least partially located outside the range in which the first flexible circuit board is vertically projected on the second flexible circuit board.

According to the display device of the embodiment of the invention, the first flexible circuit board has a notch near the display panel, and the second pad is at least partially located in the notch.

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

According to the display device of the embodiment of the 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 of the embodiment of the invention, the bonding component is a conductive adhesive, a solder or a conductive tape.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the principles of the invention, and to provide a further explanation of the scope of the invention.

The present invention provides a display device. In a preferred embodiment, the display device of the present invention comprises a liquid crystal display device. The liquid crystal display device generally refers to a display device using a liquid crystal panel, and includes a liquid crystal television for a household, a liquid crystal monitor for a personal computer and a laptop computer, a smart phone, a portable internet device, and a liquid crystal display screen of a digital camera. However, in various embodiments, the present invention may also include display devices for organic light emitting diode panels 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 preferably at least partially overlaps with the second electronic module 200 . In this embodiment, the first electronic module 100 is a display panel module, and is 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. In different embodiments, the first electronic module 100 can also be an organic light emitting diode panel module or other panel module; and the second electronic module 200 can be an electromagnetic touch sensing module or the like. The modules of the first electronic module 100 at least partially overlap.

As shown in FIG. 1 and FIG. 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 that is connected to the display panel 120 and extends outward from the peripheral area of the display panel 120 for connection with an external signal source to transmit signals to the display panel. 120. However, in various embodiments, the first flexible circuit board 110 may also be replaced by a cable, a film, or other similarly functioning component. The first flexible circuit board 110 has a first signal connection portion 111 and a first surface 110a. The first signal connection portion 111 and the first surface 110a are provided with at least one first pad 130.

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

Referring to FIG. 1 and FIG. 3 , the second electronic module 200 further includes a light guide plate 220 adjacent 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. The light is disposed under the first electronic module 100 to provide a 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) under 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 directly distributed under 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 for connection with an external signal source to transmit signals to the light-emitting element 214. However, in various embodiments, the second flexible circuit board 210 can also be formed by wires, films, or other components having similar functions. The second flexible circuit board 210 is a flexible circuit board extending in a direction substantially parallel to and extending at least partially from the extending direction of the first flexible circuit board 110. 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 210a faces the first flexible circuit board 110, that is, the first surface 110a and the second surface 210a both face in the same direction.

As shown in FIG. 2 and FIG. 3, the second signal connection portion 211 is at least partially located outside the range in which the first flexible circuit board 110 is vertically projected on the second flexible circuit board 210, that is, the second signal connection portion 211 at least partially protrudes from The first flexible circuit board 110 is outside. The joint member 150 is connected to each of the corresponding first pads 130 and the second pads 230 respectively. The bonding member 150 is, for example, a conductive paste, a solder or a conductive tape, that is, the first pads 130 and the second pads 230 are coupled to each other by soldering or bonding. In terms of soldering method, it is preferable to include soldering, laser spot welding and other connection methods having the same effect.

In the 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 110a of the first flexible circuit board 110. The first signal connection portion 111 is adjacent to or at least partially overlapped with the second signal connection portion 211 , and is disposed on the first connection pad 130 and the second connection pad 230 corresponding to the first signal connection portion 111 and the second signal connection portion 211 . Electrical connection. The signal sent from the signal source is transmitted to the first pad on the first signal connection portion 111 via the first flexible circuit board 110 by the electrical connection between the corresponding first signal connection portion 111 and the second signal connection portion 211. The second pad 130 is transferred to the second pad 230 on the second signal connecting portion 211 via the first pad 130 on the first signal connecting portion 111. ­

As shown in FIG. 4, and referring to FIG. 3, the first flexible circuit board 110 and the second flexible circuit board 210 are partially bent and superposed on the display panel 120 and the light guide plate 220 after being electrically connected by the bonding member 150. The first signal connection portion 111 and the second signal connection portion 211 are superposed on the display panel 120 and the light guide plate 220 and are retracted into the coverage of the first electronic module 100, and the engagement member 150 is located away from the cover. One side of the second electronic module 200. The second flexible circuit board 210 is completely 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 110a of the first flexible circuit board 110. With the above design, the second flexible circuit board 210 of the present embodiment does not need to be folded from the bottom to the top of the first flexible circuit board 210, and the second flexible circuit board is damaged or the first flexible circuit board is torn. problem.

FIG. 5 is another embodiment of the present invention. In the embodiment, the first flexible circuit board 110 has a notch 160 near the display panel 120, that is, in the direction of the y direction 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 widened to form a notch 160. In other words, 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 located outside the range of the first flexible circuit board 110 perpendicularly projected on 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 position of the first pad 130 perpendicularly projected on the contour 130' of the second surface 210a and the corresponding second pad 230. Referring to FIG. 6a, the contour 130' on the second surface 210a is in one-to-one correspondence with the second pad 230, and 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 from the central axis a2 is less than d/2, for example 0. Referring to FIG. 6b, the contour 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 contour 130' and the second pad 230 are first. 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-described 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 equivalents of the spirit and scope of the invention are included in the scope of the invention.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

100‧‧‧First electronic module

110‧‧‧First flexible circuit board

110a‧‧‧ first surface

111‧‧‧First Signal Connection

120‧‧‧ display panel

130‧‧‧First mat

130’‧‧‧ contour

150‧‧‧Joint parts

160‧‧‧ gap

200‧‧‧Second electronic module

210‧‧‧Second flexible circuit board

210a‧‧‧second surface

211‧‧‧second signal connection

214‧‧‧Lighting elements

220‧‧‧Light guide plate

230‧‧‧second mat

1 is a view showing an exploded view of an embodiment of a display device according to an embodiment of the present invention; FIG. 2 is a schematic view showing an embodiment of a combination of a first electronic module and a second electronic module; FIG. 5 is a schematic view showing another embodiment of the display device of the present invention; FIG. 6a-6c is a schematic view showing the relative position of the first flexible circuit board and the second flexible circuit board;

110‧‧‧First flexible circuit board

111‧‧‧First Signal Connection

120‧‧‧ display panel

130‧‧‧First mat

210‧‧‧Second flexible circuit board

211‧‧‧second signal connection

230‧‧‧second mat

Claims (10)

A display device includes: a first electronic module, comprising a first flexible circuit board, a first surface of the first flexible circuit board includes at least one first pad; and a second electronic module includes a first a second flexible circuit board disposed under the first electronic module, the second flexible circuit board at least partially overlapping the first flexible circuit board, and the second flexible circuit board being second The surface includes at least one second pad, the second surface faces the first flexible circuit board, and a contour of each of the first pads vertically projected on the second surface at least partially overlaps with each of the corresponding second pads Or adjacent, the first surface and the second surface face in the same direction; and at least one bonding component is respectively connected to the corresponding first pad and each of the second pads. The display device of claim 1, 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 of claim 1, wherein the second flexible circuit board is completely on the opposite side of the first surface of the first flexible circuit board. The display device of claim 1, wherein the bonding member is a conductive paste, a solder or a conductive tape. The display device of claim 1, wherein the second electronic module comprises a backlight module, and the backlight module comprises at least one light source disposed on the second flexible circuit board. The display device of claim 1, wherein the first electronic module comprises a display panel, and the display panel is connected to the first flexible circuit board. The display device of claim 6, wherein the first flexible circuit board has a notch near the display panel, and the second pad is at least partially located in the notch. The display device of claim 6, wherein the first flexible circuit board comprises a first signal connection portion, the first connection pad is located at the first signal connection portion, and the second flexible circuit board comprises a The second signal connection portion 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. The display device of claim 8, wherein the second signal connection portion is at least partially located outside the range in which the first flexible circuit board is vertically projected on the second flexible circuit board. The display device of claim 8, wherein the second signal connection portion at least partially protrudes beyond the first flexible circuit board.