WO2020133812A1

WO2020133812A1 - Display device

Info

Publication number: WO2020133812A1
Application number: PCT/CN2019/082923
Authority: WO
Inventors: 赵鹏程
Original assignee: 武汉华星光电技术有限公司
Priority date: 2018-12-29
Filing date: 2019-04-16
Publication date: 2020-07-02
Also published as: CN109407428A

Abstract

The present application provides a display device. After a first functional component and a second functional component are connected, a liquid glue is used for covering a first connection terminal and a second connection terminal, and is cured to form a solid glue. In this way, the solid glue covers the first connection terminal and the second connection terminal, so that edges thereof would not warp. The present invention solves the existing technical problem of warping of edges of pad adhesive tapes when using pad adhesive tapes in a display device, and also increases the strength after the functional components are connected.

Description

Display device

Technical field

The present application relates to the field of equipment assembly, in particular to a display device.

Background technique

The current display device includes various pads, such as a pad that solders a backlight circuit board (BLU FPC) to the backplane.

As shown in FIG. 1, after soldering the terminal 111 on the backlight circuit board 11 (BLU FPC) to the pad 121 on the backplane 12, the pad tape 13 is attached to fix the welding effect, but the edge of the pad tape 13 is easy Curl up, resulting in poor fixing effect.

That is, the existing display device has defects.

technical problem

The present application provides a display device to solve the technical problem that the edge of the pad tape existing in the existing display device uses the pad tape.

Technical solution

In order to solve the above problems, the technical solutions provided by this application are as follows:

An embodiment of the present application provides a display device, including:

A first functional component, including a first connection terminal;

A second functional component, including a second connection terminal, the second connection terminal being connected to the first connection terminal;

A solid glue wraps the first connection terminal and the second connection terminal. The solid glue wraps the first connection terminal and the second connection terminal with a liquid glue and then solidifies.

In the display device of the present application, the liquid glue includes photocurable glue.

In the display device of the present application, the photocurable adhesive is an ultraviolet photocurable adhesive.

In the display device of the present application, the liquid glue includes transparent optical glue.

In the display device of the present application, the liquid glue includes pressure-sensitive glue.

In the display device of the present application, the display device further includes a protective member formed on the surface of the solid glue.

In the display device of the present application, the protection member includes an anti-corrosion glue formed on the surface of the solid glue.

In the display device of the present application, the first connection terminal and the second connection terminal are press-fit connected.

In the display device of the present application, the first connection terminal and the second connection terminal are connected by a conductive adhesive film.

In the display device of the present application, the first connection terminal and the second connection terminal are soldered by soldering.

In the display device of the present application, the display device includes a display panel and a backlight unit. The backlight unit is disposed on one side of the display panel and provides the backlight required for image display for the display panel. The display panel includes a first substrate and a second substrate And the liquid crystal molecules sandwiched between the two.

In the display device of the present application, the backlight unit is disposed on a side of the first substrate away from the second substrate.

In the display device of the present application, the second substrate is a color filter substrate.

In the display device of the present application, the first substrate is an array substrate.

In the display device of the present application, the size of the first substrate is larger than the size of the second substrate in a predetermined direction, thereby making the surface of the first substrate facing the second substrate relative to the second substrate Partially exposed, a pad is provided on the exposed portion of the first substrate, the backlight unit includes a flexible circuit board, and the golden fingers of the flexible circuit board are press-fitted to the pad, and then pass through the pad and The golden finger supplies power to the backlight unit.

In the display device of the present application, the backlight unit is provided on one side of the display panel, and after the flexible circuit board is folded, the golden finger is pressed and connected to the pad.

In the display device of the present application, a conductive adhesive film is provided between the golden finger and the pad, and the two are used to realize the press-fit connection through the conductive adhesive film.

In the display device of the present application, the conductive adhesive film includes an anisotropic conductive film.

In the display device of the present application, the display device further includes a protective layer covering the press-fit connection, and the protective layer is located on the gold finger and the pad.

In the display device of the present application, the protective layer includes anti-corrosion glue.

Beneficial effect

The present application provides a new display device including: a first functional member including a first connection terminal, a second functional member including a second connection terminal, the second connection terminal being connected to the first connection terminal, Solid glue, which wraps the first connection terminal and the second connection terminal, and the solid glue is formed by curing the first connection terminal and the second connection terminal with liquid glue, and then solidifies; in the display device, After the first functional component and the second functional component are connected, the first connection terminal and the second connection terminal are wrapped with liquid glue, and cured to form a solid glue, so that the solid glue will wrap the first connection terminal and the second connection terminal, and their edges The utility model does not warp, which solves the technical problem that the edge of the pad tape existing in the existing display device uses the pad tape, and also increases the strength after the functional member is connected.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only inventions. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of an existing pad after welding.

FIG. 2 is a top view of a display device provided by an embodiment of the present application after being connected.

3 is an A-A' cross-sectional view of a display device provided in an embodiment of the present application after being connected.

4 is a B-B' cross-sectional view of a display device provided in an embodiment of the present application after being connected.

FIG. 5 is a schematic diagram of a combination of display devices provided by an embodiment of the present application.

6 is a schematic diagram of a connection terminal provided by an embodiment of the present application.

7 is a C-C' cross-sectional view of a display device provided in an embodiment of the present application after being connected.

Embodiments of the invention

The descriptions of the following embodiments refer to additional drawings to illustrate specific embodiments that can be implemented in the present application. Directional terms mentioned in this application, such as [upper], [lower], [front], [back], [left], [right], [inner], [outer], [side], etc., are for reference only Attach the direction of the schema. Therefore, the directional language used is to illustrate and understand this application, not to limit this application. In the figure, units with similar structures are indicated by the same reference numerals.

The present application is directed to the technical problem that the edge of the pad tape is lifted by the existing display device using the pad tape; the embodiments of the present application can solve this defect.

As shown in FIGS. 2 to 4, the display device 2 provided by the present application includes:

The first functional member 21 includes a first connection terminal 211;

The second functional member 22 includes a second connection terminal 221, and the second connection terminal 221 is connected to the first connection terminal 211;

The solid glue 23 wraps the first connection terminal 211 and the second connection terminal 221. The solid glue 23 is formed by solidifying the first connection terminal and the second connection terminal after being wrapped by liquid glue.

This embodiment provides a new display device including: a first functional member including a first connection terminal, a second functional member including a second connection terminal, and the second connection terminal is connected to the first connection terminal , Solid glue, which wraps the first connection terminal and the second connection terminal, and the solid glue is formed by solidifying the first connection terminal and the second connection terminal with liquid glue, and then solidifies; in the display device After the first functional component and the second functional component are connected, the first connection terminal and the second connection terminal are wrapped with liquid glue and cured to form a solid glue, so that the solid glue will wrap the first connection terminal and the second connection terminal. The edge does not warp, which solves the technical problem of the edge of the pad tape that the existing display device uses the pad tape, and also increases the strength after the functional member is connected.

In one embodiment, the liquid glue includes photocurable glue and the like.

In one embodiment, the photocurable adhesive is an ultraviolet photocurable adhesive, such as UV adhesive.

In one embodiment, the liquid glue includes transparent optical glue and the like.

In one embodiment, the liquid glue includes pressure-sensitive glue and the like.

In one embodiment, as shown in FIGS. 2 to 4, the display device 2 further includes a protection member 24 formed on the surface of the solid glue 23.

In one embodiment, the protection member 24 includes an anti-corrosion glue formed on the surface of the solid glue.

In an embodiment, the first connection terminal 211 and the second connection terminal 221 are press-fit connected.

In an embodiment, the first connection terminal 211 and the second connection terminal 221 are connected by a conductive adhesive film.

In one embodiment, the first connection terminal 211 and the second connection terminal 221 are soldered by soldering.

As described above, the connection method of the first connection terminal 211 and the second connection terminal 221 may be soldering, but there are some problems, therefore, the present application provides that the first connection terminal 211 and the second connection terminal 221 are pressed together The way to connect.

Specifically, most display devices on the display market currently belong to passive light-emitting products, that is, the display panel needs the backlight unit to provide backlight in order to display images, so the flexible circuit board of the backlight unit (Flexible) Printed Circuit (FPC, also known as flexible printed circuit board) good contact between the golden finger and the pad (Pad) plays a vital role in the entire display device.

In the prior art, the contact between the gold finger and the pad is generally achieved by soldering. However, in order to cater to the trend of narrow bezel design, the pads are getting smaller and smaller, so that the size of the tin leakage hole is reduced accordingly. Due to the surface tension of the solder itself, the solder leakage hole is too small, so that the solder cannot flow through the solder leakage hole, so that the golden finger and the pad can not be well welded, that is, poor contact occurs, so that the backlight unit cannot provide a stable backlight for the display panel. Display quality.

In one embodiment, the present application provides a display device and a display panel thereof, which can avoid poor contact between a gold finger of a backlight unit and a pad, and ensure a stable backlight.

As shown in FIG. 5, the display device 50 may be an LCD (Liquid Crystal Display), including a display panel 51 and a backlight unit 52. The backlight unit 52 is disposed on one side of the display panel 51 and provides an image display for the display panel 51. For the required backlight, the display panel 51 includes a first substrate 511 and a second substrate 512 and liquid crystal molecules interposed therebetween.

In one embodiment, the backlight unit 52 may be disposed on the side of the first substrate 511 away from the second substrate 512 or on the side of the first substrate 511 near the second substrate 512. And when the backlight unit 52 is disposed near the first substrate 111 and away from the second substrate 512, the first substrate 511 is a thin film transistor substrate (Thin Film (Transistor Substrate, also known as TFT substrate or array substrate), correspondingly, the second substrate 512 is a color filter substrate (Color Filter Substrate, also known as CF substrate or color film substrate).

6, in the predetermined direction indicated by the arrow x, the size of the first substrate 511 is larger than the size of the second substrate 512. When the first substrate 511 and the second substrate 512 are attached to each other, the orientation of the first substrate 511 is The surface of the second substrate 512 is partially exposed with respect to the second substrate 512. That is, when the first substrate 511 and the second substrate 512 are attached to each other in a predetermined direction, one end of the first substrate 511 and one end of the second substrate 512 are aligned, and the other end of the first substrate 511 is opposite to the The other end is exposed, and the exposed portion of the first substrate 511 may be referred to as a TFT step, and one or more pads 521 (that is, the first connection terminals above) are provided at the TFT step. After the flexible circuit board 522 of the backlight unit 52 is folded, the golden finger 523 (that is, the two connection terminals above) is pressed and connected to the pad 521, so that the backlight unit 52 can be powered through the pad 521 and the golden finger 523.

The above-mentioned design of the embodiment of the present application is a press-fit connection. Compared with soldering, the press-fit connection avoids the poor soldering phenomenon caused by too small tin leakage holes during soldering, which is beneficial to the narrow frame design of the display device 50 At the same time, the poor contact between the golden finger 523 of the flexible circuit board 522 and the pad 521 is avoided, thereby ensuring that the backlight unit 52 provides a stable backlight for the display panel 51 and ensuring the display quality of the display device 50. Of course, since there is no need to use an electric soldering iron for soldering, the risk of power consumption can be reduced and the working environment of the operator can be improved.

In one embodiment, the present application uses an optical camera (Camera) to align the gold finger 523 and the pad 521 and then realize a press-fit connection, which greatly improves the alignment accuracy during connection and further ensures the gold finger 523 and the Good contact of the pad 521.

In one embodiment, as shown in FIG. 7, in order to better improve the contact between the gold finger 523 and the pad 521, a conductive adhesive film 524 is provided between the gold finger 523 and the pad 521, so that the gold finger 523 and the pad 521 realize the press-fit connection through a conductive adhesive film. The conductive adhesive film 524 includes but is not limited to ACF (Anisotropic (Conductive Film, anisotropic conductive film), can increase the contact area and adhesion between the gold finger 123 and the pad 121.

In one embodiment, as shown in FIG. 7, in order to prevent the pad 521 from being corroded by water vapor, salt mist, etc. and causing a short circuit, a protective layer 525 (including the above fixing glue and protection Components, etc.), specifically, the protective layer 525 covers the press-fit connection and is located on the golden finger 523 and the pad 521. The protective layer 525 includes, but is not limited to, Tuffy glue and other types of anti-corrosion glue, which can also increase the structural strength of the press-fit connection and prevent the gold finger 523 from coming out of contact with the pad 521.

In one embodiment, the power supply circuit of the backlight unit 52 is not printed on the flexible circuit board 522, but directly printed on the exposed portion of the first substrate 511, that is, the TFT step. The golden finger 523 of the power supply circuit has an angle with the surface of the external leakage portion. The golden finger 523 can also be press-fitted to the pad 521 so that external power can supply power to the backlight unit 52 through the pad 521 and the golden finger 523.

Meanwhile, in an embodiment, the present application provides a process flow corresponding to a display device. The BLU (backlight) assembly process of the assembly section includes the following steps:

1. The incoming materials from the fitting section or BD section are put into the ASSY production line;

2. TPO or FOG, assembled with BLU;

3. After assembling, the pad is clean, then UV glue is applied, and the UV lamp is cured;

4. OTP/TP burning, FI/VI check.

This embodiment proposes a solution of replacing the adhesive tape with UV glue, which can reduce the problem of missing adhesive tape and edge warping of the adhesive tape, and can reinforce the backlight FPC to reduce the risk of backlight FPC breakage.

According to the above embodiment, it is known that:

The present application provides a new display device including: a first functional member including a first connection terminal, a second functional member including a second connection terminal, and the second connection terminal is connected to the first connection terminal , Solid glue, which wraps the first connection terminal and the second connection terminal, and the solid glue is formed by solidifying the first connection terminal and the second connection terminal with liquid glue, and then solidifies; in the display device After the first functional component and the second functional component are connected, the first connection terminal and the second connection terminal are wrapped with liquid glue and cured to form a solid glue, so that the solid glue will wrap the first connection terminal and the second connection terminal. The edge does not warp, which solves the technical problem of the edge of the pad tape that the existing display device uses the pad tape, and also increases the strength after the functional member is connected.

In summary, although the present application has been disclosed as preferred embodiments above, the above preferred embodiments are not intended to limit the present application. Those of ordinary skill in the art can make various changes without departing from the spirit and scope of the present application Such changes and retouching, so the scope of protection of this application shall be subject to the scope defined by the claims.

Claims

A display device includes:

A first functional component, including a first connection terminal;

A second functional component, including a second connection terminal, the second connection terminal being connected to the first connection terminal;

A solid glue wraps the first connection terminal and the second connection terminal. The solid glue wraps the first connection terminal and the second connection terminal with a liquid glue and then solidifies.
The display device according to claim 1, wherein the liquid glue comprises a photocurable glue.
The display device according to claim 2, wherein the photocurable glue is an ultraviolet photocurable glue.
The display device according to claim 1, wherein the liquid glue includes a transparent optical glue.
The display device according to claim 1, wherein the liquid glue includes a pressure-sensitive glue.
The display device according to claim 1, wherein the display device further comprises a protective member formed on the surface of the solid glue.
The display device according to claim 6, wherein the protection member includes an anti-corrosion glue formed on the surface of the solid glue.
The display device according to claim 1, wherein the first connection terminal and the second connection terminal are press-fit connected.
The display device according to claim 1, wherein the first connection terminal and the second connection terminal are connected by a conductive adhesive film.
The display device according to claim 1, wherein the first connection terminal and the second connection terminal are soldered by soldering.
The display device according to claim 1, wherein the display device includes a display panel and a backlight unit, the backlight unit is disposed on one side of the display panel and provides the backlight required for image display for the display panel, the display panel includes the first substrate And the second substrate and the liquid crystal molecules interposed between the two.
The display device according to claim 11, wherein the backlight unit is disposed on a side of the first substrate away from the second substrate.
The display device according to claim 11, wherein the second substrate is a color filter substrate.
The display device according to claim 11, wherein the first substrate is an array substrate.
The display device according to claim 11, wherein the size of the first substrate is larger than the size of the second substrate in a predetermined direction, thereby making the surface of the first substrate facing the second substrate relative to the The second substrate is partially exposed, the exposed portion of the first substrate is provided with a pad, and the backlight unit includes a flexible circuit board, and the gold fingers of the flexible circuit board are pressed and connected to the pad, and then pass through The pad and the golden finger power the backlight unit.
The display device according to claim 15, wherein the backlight unit is disposed on one side of the display panel, and the flexible circuit board is folded so that the golden finger is press-fitted to the pad.
The display device according to claim 16, wherein a conductive adhesive film is provided between the golden finger and the pad, and the two are used to realize the press-fit connection through the conductive adhesive film.
The display device according to claim 17, wherein the conductive paste film includes an anisotropic conductive film.
The display device according to claim 18, wherein the display device further comprises a protective layer covering the press-fit connection, the protective layer being located on the gold finger and the pad.
The display device according to claim 19, wherein the protective layer includes an anti-corrosion glue.