Display panel

Provided is a display panel, which includes a display region, a fanout region and a bonding region. The fanout region is disposed between the display region and the bonding region. The fanout region includes a first subregion, a bending subregion and a second subregion. The first subregion is connected to the display region. The second subregion is connected to the bonding region. The bending subregion is connected to the first subregion and the second subregion. When the bending subregion is bent toward a rear face of the display region, the second subregion and the bonding region are located on the rear face of the display region.

BACKGROUND

1. Field of Disclosure

The present application relates to display technologies, and more particularly, to a display panel.

2. Description of Related Art

Referring toFIG. 1, in an existing rigid display panel013, the rigid display panel013includes a display region101and a non-display region102distributed around the display region101. Generally, a bottom bezel of the non-display region102is divided into metal fanout traces103and a bonding region104such that the bottom bezel occupies a large space, resulting in unable to carry out narrow bezel for the existing display panel.

SUMMARY

Embodiments of the present application provide a display panel, for solving the problem of a great deal of needs of narrow bezel for the existing display panels.

Embodiments of the present application provide a display panel, which includes:

a display region, configured to display images;

a fanout region, disposed between the display region and a bonding region; and

the bonding region, configured to bond with a driving chip,

wherein the fanout region includes a first subregion, a bending subregion and a second subregion, the first subregion connects to the display region, the second subregion connects to the bonding region, the bending subregion connects to the first subregion and the second subregion;

wherein when the bending subregion is bent toward a rear face of the display region, the second subregion and the bonding region are located on the rear face of the display region;

wherein the display panel includes a first rigid substrate, a second rigid substrate and a flexible substrate, the display region and the first subregion are disposed on the first rigid substrate, the bonding region and the second subregion are disposed on the second rigid substrate, the bending subregion is disposed on the flexible substrate; and

wherein the fanout region includes a plurality of fanout traces, each of which includes a first portion disposed in the first subregion, a bending portion disposed in the bending subregion and a second portion disposed in the second subregion, the bending portion is electrically connected to the first portion and the second portion, the first portion is electrically connected to the display region, the second portion is electrically connected to the bonding region.

In the display panel of the present application, each of the first portion includes a first metal trace and a first solder pad connecting to an end of the first metal trace, the first solder pad is disposed at an end of the first metal trace away from the display region;

each of the second portion includes a second metal trace and a second solder pad connecting to an end of the second metal trace, the second solder pad is disposed at an end of the second metal trace away from the bonding region;

each of the bending portion includes a third metal trace, and a third solder pad and a fourth solder pad that are connected to two ends of the third metal trace, respectively; and

the third solder pad is electrically connected to the first solder pad and the fourth solder pad is electrically connected to the second solder pad.

In the display panel of the present application, conductive glue is electrically connected between the third solder pad and the first solder pad and between the fourth solder pad and the second solder pad.

In the display panel of the present application, contact faces of the first solder pad, the second solder pad, the third solder pad and the fourth solder pad that contact the conductive glue are concave faces.

In the display panel of the present application, the third metal trace includes a trace body and through-holes disposed on the trace body, the through-holes are disposed at intervals along extension of the trace body.

In the display panel of the present application, spacing between the through-holes gradually decreases from two sides to the middle.

In the display panel of the present application, both of two lateral edges of the trace body are curved edges.

In the display panel of the present application, the through-holes are shaped as one of an ellipse, a circle and a rhombus.

Embodiments of the present application provide a display panel, which includes:

a display region, configured to display images;

a fanout region, disposed between the display region and a bonding region; and

the bonding region, configured to bond with a driving chip,

wherein the fanout region includes a first subregion, a bending subregion and a second subregion, the first subregion connects to the display region, the second subregion connects to the bonding region, the bending subregion connects to the first subregion and the second subregion;

wherein when the bending subregion is bent toward a rear face of the display region, the second subregion and the bonding region are located on the rear face of the display region.

In the display panel of the present application, the display panel includes a first rigid substrate, a second rigid substrate and a flexible substrate, the display region and the first subregion are disposed on the first rigid substrate, the bonding region and the second subregion are disposed on the second rigid substrate, the bending subregion is disposed on the flexible substrate.

In the display panel of the present application, the fanout region includes a plurality of fanout traces, each of which includes a first portion disposed in the first subregion, a bending portion disposed in the bending subregion and a second portion disposed in the second subregion, the bending portion is electrically connected to the first portion and the second portion, the first portion is electrically connected to the display region, the second portion is electrically connected to the bonding region.

In the display panel of the present application, each of the first portion includes a first metal trace and a first solder pad connecting to an end of the first metal trace, the first solder pad is disposed at an end of the first metal trace away from the display region;

each of the second portion includes a second metal trace and a second solder pad connecting to an end of the second metal trace, the second solder pad is disposed at an end of the second metal trace away from the bonding region;

each of the bending portion includes a third metal trace, and a third solder pad and a fourth solder pad that are connected to two ends of the third metal trace, respectively; and

the third solder pad is electrically connected to the first solder pad and the fourth solder pad is electrically connected to the second solder pad.

In the display panel of the present application, conductive glue is electrically connected between the third solder pad and the first solder pad and between the fourth solder pad and the second solder pad.

In the display panel of the present application, contact faces of the first solder pad, the second solder pad, the third solder pad and the fourth solder pad that contact the conductive glue are concave faces.

In the display panel of the present application, the third metal trace includes a trace body and through-holes disposed on the trace body, the through-holes are disposed at intervals along extension of the trace body.

In the display panel of the present application, spacing between the through-holes gradually decreases from two sides to the middle.

In the display panel of the present application, both of two lateral edges of the trace body are curved edges.

In the display panel of the present application, the through-holes are shaped as one of an ellipse, a circle and a rhombus.

Compared to the display panel of the existing arts, the display panel of the present application carries out reducing the bezel width by disposing the bending subregion in the fanout region, and locating the second subregion and the bonding region on the rear face of the display region by bending the bending subregion. This solves the problem of a great deal of needs of narrow bezel for the existing display panels.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Please refer to the appending drawings, the same components are indicated by the same reference numbers. The following descriptions are based on the exemplary embodiment of the present application and should not be taken as a limitation to other embodiments of the present application not described herein.

Please refer toFIG. 2andFIG. 3.FIG. 2is a schematic diagram showing a structure of a display panel in accordance with embodiments of the present application.FIG. 3is a schematic diagram showing another structure of the display panel in accordance with embodiments of the present application. The display panel100of the embodiments of the present application includes a display region A, a fanout region C and a bonding region B.

The display region A is configured to display images. The fanout region C is disposed between the display region A and the bonding region B. The bonding region B is configured to bond with a driving chip.

The fanout region C includes a first subregion C1, a bending subregion C3and a second subregion C2. The first subregion C1is connected to the display region A. The second subregion C2is connected to the bonding region B. The bending subregion C3is connected to the first subregion C1and the second subregion C2.

When the bending subregion C3is bent toward a rear face of the display region A, the second subregion C2and the bonding region B are located on the rear face of the display region A.

In the display panel100of the present embodiment, bezel width is reduced by disposing the fanout region C in the bending subregion C3and locating the second subregion C2and the bonding region B on the rear face of the display region A by bending the bending subregion C3.

In the display panel100of the present embodiment, the display panel100includes a first rigid substrate10, a second rigid substrate20and a flexible substrate30. The display region A and the first subregion C1are disposed on the first rigid substrate10. The bonding region B and the second subregion C2are disposed on the second rigid substrate20. The bending subregion C3is disposed on the flexible substrate30.

That is to say, the first rigid substrate10is shared by the display region A and the first subregion C2. The second rigid substrate20is shared by the second subregion C2and the bonding region B. Both of the first rigid substrate10and the second rigid substrate20can be a rigid glass substrate. The flexible substrate30can be a polyimide (PI) substrate.

The bending subregion C3is formed on the flexible substrate30for ease of bending the bending subregion C3. In addition, the first rigid substrate10and the second rigid substrate20are formed by cutting a same piece of glass substrate in the processes of manufacturing the display panel100.

In the existing arts, the display panel cannot be bent since both of the display region and a bottom bezel region (including the fanout region and the bonding region) of the display panel are formed on a rigid glass substrate. This causes the bottom bezel region to become too wide. In the present embodiment, a portion of the fanout region C is individually extracted to be formed on the flexible substrate30for ease of bending, and in a further step, the bonding region B is disposed on the rear face of the display region A to reduce the width of bottom bezel. Said portion is the bending subregion C3.

Please refer toFIG. 4andFIG. 5.FIG. 4is a schematic diagram showing a structure of a display panel including a display region, a first subregion, a second subregion and a bonding region that are in a flattened state in accordance with embodiments of the present application.FIG. 5is a schematic diagram showing a structure of the display panel including a bending subregion that is in a flattened state in accordance with embodiments of the present application.

In the display panel100of the present embodiment, the fanout region C includes a plurality of fanout traces. Each of the fanout traces40includes a first portion41disposed in the first subregion C1, a bending portion43disposed in the bending subregion C3and a second subregion42disposed in the second subregion C2. The bending portion43is electrically connected to the first portion41and the second portion42. The first portion41is electrically connected to the display region A. The second portion42is electrically connected to the bonding region B.

Specifically, each of the first portion41includes a first metal trace411and a first solder pad412connecting to an end of the first metal trace411. The first solder pad412is disposed at an end of the first metal trace411away from the display region A.

Each of the second portion42includes a second metal trace421and a second solder pad422connecting to an end of the second metal trace421. The second solder pad422is disposed at an end of the second metal trace421away from the bonding region B.

Each of the bending portion43includes a third metal trace431, and a third solder pad432and a fourth solder pad433that are connected to two ends of the third metal trace431, respectively.

The third solder pad432is electrically connected to the first solder pad412. The fourth solder pad433is electrically connected to the second solder pad422.

Conductive glue is electrically connected between the third solder pad432and the first solder pad412and between the fourth solder pad433and the second solder pad422.

All of contact faces of the first solder pad412, the second solder pad422, the third solder pad432and the fourth solder pad433that contact the conductive glue are curved faces. In such a way, when the first solder pad412cooperates with the third solder pad432and the second solder pad422cooperates with the fourth solder pad433, it is convenient to capture conductive particles in the conductive glue and increase an area contacting the conductive glue, thereby improving stability of an interface between the first solder pad412and the third solder pad432and an interface between the second solder pad422and the fourth solder pad433.

In the display panel100of the present embodiment, the third metal trace431includes a trace body4311and through-holes4312disposed on the trace body4311. The through-holes4312are disposed at intervals along extension of the trace body4311. The deployment of the through-holes4312can release bending stress when the third metal trace431is bent, thereby improving bending durability of the third metal trace431.

The spacing between the through-holes4312gradually decreases from two sides to the middle. When the bending subregion C3is bending, the third metal trace431forms an arc structure. This makes a middle portion of the third metal trace431suffer the greatest bending stress which gradually decreases toward two sides of a central line. Therefore, the deployment in which the spacing between the through-holes4312gradually decreases from the two sides to the middle makes the third metal trace431release the bending stress pertinently, thereby improving the bending durability of the third metal trace431in a further step. Optionally, the through-holes4312are shaped as one of an ellipse, a circle and a rhombus.

Both of two lateral edges of the trace body4311are curved edges. In such a deployment, it makes ease of increasing the bending durability of the third metal trace431.

The processes of manufacturing the display panel100of the present embodiment are described below.

First, a rigid glass substrate is provided.

Second, the display region A, the fanout region C and the bonding region B are formed on the rigid glass substrate. That is, the whole circuit structures of the display panel are formed on the glass substrate. This includes forming complete fanout traces and circuit structures for the bonding on the fanout region C and the bonding region B.

In the process of forming the fanout traces, the fanout traces are formed on the rigid glass substrate and meanwhile two solder pads are formed on each of the metal traces. The two solder pads are the first solder pad412and the second solder pad422, respectively. The spacing between the first solder pad412and the second solder pad422is ranged between 500 nanometers and 5 millimeters.

Third, the bending subregion C3is formed on the flexible substrate30. That is, a plurality of third metal traces431, the third solder pad432and the fourth solder pad433are formed on the flexible substrate30. The two ends of each of the third metal traces431are connected to the third solder pad412and the fourth solder pad433, respectively. And a one-to-one correspondence is established between the third metal traces431and the fanout trace on the rigid glass substrate.

Fourth, a portion between the first solder pad412and the second solder pad422of the display panel is removed by cutting. The rigid glass substrate is cut into three pieces. A rigid glass substrate for disposing the display region A and the first subregion C1is the first rigid substrate10. The fanout traces located in the first subregion C1is the first portion41. A rigid glass substrate for disposing the bonding region B and the second subregion C2is the second rigid substrate20. The fanout traces located in the second subregion C2is the second portion42. The last rigid glass substrate for supporting the fanout traces correspondingly located on it is cut out.

Fifth, a plurality of third solder pads432in the bending subregion C3corresponds to the plurality of first solder pads412one by one and they are bonded together by the conductive glue; a plurality of fourth solder pads433in the bending subregion C3corresponds to the plurality of second solder pads422in the second subregion C2one by one and they are bonded together by the conductive glue.

In a last step, the bending subregion C3is bent such that the second subregion C2and the bonding region B of the fanout region C are located on the rear face of the display region A.

In such a way, the manufacturing process of the present application is accomplished.

Compared to the display panel of the existing arts, the display panel of the present application carries out reducing the bezel width by disposing the bending subregion in the fanout region, and locating the second subregion and the bonding region on the rear face of the display region by bending the bending subregion. This solves the problem of a great deal of needs of narrow bezel for the existing display panels.

Based on the description given above, those having ordinary skills of the art may easily contemplate various changes and modifications of the technical solution and technical ideas of the present application and all these changes and modifications are considered within the protection scope of right for the present application.