FLAT PANEL DISPLAY

• US 20200135062A1
• Filed: 01/12/2018
• Published: 04/30/2020
• Est. Priority Date: 12/18/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: YAN, Weinan
• Granted Patent: US 10,902,754 B2
• Time in Patent Office: Days
• CPC Class Codes: G09F 9/301 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
• CPC Class Codes: H05K 1/111 Pads for surface mounting, e.g. lay-out
• CPC Class Codes: H05K 1/118 specially for flexible printed circuits, e.g. using folded portions
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/09381 Shape of non-curved single flat metallic pad, land or exposed part thereof; Shape of electrode of leadless component
• CPC Class Codes: H05K 2201/09418 Special orientation of pads, lands or terminals of component, e.g. radial or polygonal orientation
• CPC Class Codes: H05K 2201/10128 Display
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

A flat panel display is provided. A first metal joining surface on a display panel includes a first transverse part and a first longitudinal part, and the area occupied by the first transverse part along a transverse direction is larger than the area occupied by the first longitudinal part along the transverse direction. A second metal joining surface on a flexible wiring substrate includes a second transverse part and a second longitudinal part, and the area occupied by the second transverse part along the transverse direction is larger than the area occupied by the second longitudinal part along the transverse direction. The above design can increase the contact area between the first metal joining surface and the second metal joining surface after the expanding offset between the display panel and the flexible wiring substrate occurring in a thermal joining process, to guarantee electrical signals transmitting normally and improve displaying effect.

Claims

1. A flat panel display, comprising:

a display panel;

a flexible wiring substrate;

wherein the display panel includes a display area and a bonding area arranged at outside of the display area, and the flexible wiring substrate and the display panel are joined together at the bonding area;

wherein the display panel includes multiple first metal joining surfaces in the bonding area, the flexible wiring substrate includes multiple second metal joining surfaces in an area thereon corresponding to the bonding area, and one the first metal joining surface and one the second metal joining surface corresponding thereto are joined to form an electrical contact;

wherein the first metal joining surface and the second metal joining surface have a same shape;

wherein the first metal joining surface includes a first transverse part arranged transversely and a first longitudinal part connected vertically to the first transverse part, and an area occupied by the first transverse part along a transverse direction is larger than an area occupied by the first longitudinal part along the transverse direction; and

wherein the second metal joining surface includes a second transverse part arranged transversely and a second longitudinal part connected vertically to the second transverse part, and an area occupied by the second transverse part along the transverse direction is larger than an area occupied by the second longitudinal part along the transverse direction.

2. The flat panel display according to claim 1, wherein the first metal joining surface and the second metal joining surface are L-shaped or reverse L-shaped, and the first longitudinal part is connected vertically to an end of the first transverse part, the second longitudinal part is connected vertically to an end of the second transverse part.

3. The flat panel display according to claim 1, wherein the first metal joining surface and the second metal joining surface are T-shaped or reverse T-shaped, and the first longitudinal part is connected vertically to a middle of the first transverse part, the second longitudinal part is connected vertically to a middle of the second transverse part.

4. The flat panel display according to claim 1, wherein an expansion coefficient of the flexible wiring substrate is larger than an expansion coefficient of the display panel.

5. The flat panel display according to claim 4, wherein the second metal joining surface is performed by a pre-shrink process relative to the first metal joining surface.

6. The flat panel display according to claim 4, wherein the flexible wiring substrate is a chip on film (COF) or a flexible printed circuit (FPC).

7. The flat panel display according to claim 1_;

wherein the multiple first metal joining surfaces and the multiple second metal joining surfaces both are arranged in multiple rows;

wherein the first longitudinal part of one of two adjacent the first metal joining surfaces in a same row is extending downward, and the first longitudinal part of the other of two adjacent the first metal joining surfaces in the same row is extending upward;

wherein the second longitudinal part of one of two adjacent the second metal joining surfaces in a same row is extending downward, and the second longitudinal part of the other of two adjacent the second metal joining surfaces in the same row is extending upward.

8. A flat panel display, comprising:

a display panel;

a flexible wiring substrate;

wherein the display panel includes a display area and a bonding area arranged at outside of the display area_;

and the flexible wiring substrate and the display panel are joined together at the bonding area;

wherein the display panel includes multiple first metal joining surfaces in the bonding area, the flexible wiring substrate includes multiple second metal joining surfaces in an area thereon corresponding to the bonding area, and one the first metal joining surface and one the second metal joining surface corresponding thereto are joined to form an electrical contact;

wherein the first metal joining surface and the second metal joining surface have a same shape;

wherein the first metal joining surface includes a first transverse part arranged transversely and a first longitudinal part connected vertically to the first transverse part, and an area occupied by the first transverse part along a transverse direction is larger than an area occupied by the first longitudinal part along the transverse direction;

wherein the second metal joining surface includes a second transverse part arranged transversely and a second longitudinal part connected vertically to the second transverse part, and an area occupied by the second transverse part along the transverse direction is larger than an area occupied by the second longitudinal part along the transverse direction;

wherein an expansion coefficient of the flexible wiring substrate is larger than an expansion coefficient of the display panel;

wherein the second metal joining surface is performed by a pre-shrink process relative to the first metal joining surface;

wherein the flexible wiring substrate is a chip on film (COF) or a flexible printed circuit (FPC); and

wherein the multiple first metal joining surfaces and the multiple second metal joining surfaces both are arranged in multiple rows;

wherein the first longitudinal part of one of two adjacent the first metal joining surfaces in a same row is extending downward, and the first longitudinal part of the other of two adjacent the first metal joining surfaces in the same row is extending upward;

wherein the second longitudinal part of one of two adjacent the second metal joining surfaces in a same row is extending downward, and the second longitudinal part of the other of two adjacent the second metal joining surfaces in the same row is extending upward.

9. The flat panel display according to claim 8, wherein the first metal joining surface and the second metal joining surface are L-shaped or reverse L-shaped, and the first longitudinal part is connected vertically to an end of the first transverse part, the second longitudinal part is connected vertically to an end of the second transverse part.

10. The flat panel display according to claim 8, wherein the first metal joining surface and the second metal joining surface are T-shaped or reverse T-shaped, and the first longitudinal part is connected vertically to a middle of the first transverse part, the second longitudinal part is connected vertically to a middle of the second transverse part.