Foldable panel and method of manufacturing thereof

Patent metadata

Field	Value
Publication number	US-10290239-B2
Application number	US-201715521665-A
Country	US
Kind code	B2
Filing date	Mar 20, 2017
Priority date	Mar 6, 2017
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

This disclosure discloses a foldable panel, including a flexible display panel and a driver IC, the driver IC is arranged at a bonding end of a flexible substrate of the panel, and the bonding end is bent backward to the contrary direction of a light side of the panel, so that the driver IC is located at back side of the substrate; a thin film wiring layer connected between an active area and the driver IC is also arranged on the substrate, conductive wires are disposed on the thin film wiring layer for connecting the panel and the driver IC. This disclosure also discloses a method of manufacturing the foldable panel. By using the method, the active area proportion of the panel can be the maximum, this disclosure also ensures the circuit having good bending performance and avoids the use of COF and the risk of fracturing wires.

First claim

What is claimed is:

1. A foldable panel, wherein comprising a flexible display panel and a driver IC, the driver IC is arranged at a bonding end of a flexible substrate of the flexible display panel, and the bonding end is bent backward to a contrary direction of a light side of the flexible display panel, so that the driver IC is located at back of the flexible substrate; a thin film wiring layer connected between an active area and the driver IC is further arranged on the flexible substrate, one surface of the thin film wiring layer is provided with conductive wires connected to the flexible display panel and the driver IC respectively;
wherein the bonding end of the flexible substrate is arranged a plurality of first bonding terminals close to the active area and a plurality of second bonding terminals close to the driver IC, the number of the first and the second bonding terminals are the same, the first bonding terminals are connected the second bonding terminals one to one by the thin film wiring layer.

2. The foldable panel according to claim 1 , wherein the conductive wires are disposed at inner surface of the thin film wiring layer and opposite from the flexible substrate.

3. The foldable panel according to claim 1 , wherein at least two of the conductive wires are connected between each of the first and the second bonding terminals.

4. The foldable panel according to claim 3 , wherein the conductive wires are wavy shape.

5. The foldable panel according to claim 3 , wherein the conductive wires are chain structures formed of multiple conductive rings connected to each other.

6. The foldable panel according to claim 5 , wherein connecting parts of two adjacent conductive rings of the conductive wires are staggered to each other.

7. The foldable panel according to claim 1 , wherein the driver IC is directly bonded on the flexible substrate or is bonded on the flexible substrate by a flexible circuit board.

8. The foldable panel according to claim 1 , wherein a reinforcing plate is further bonded on back side of the bonding end of the flexible substrate, the reinforcing plate at least covers back side of the driver IC where is disposed on the bonding end.

9. The foldable panel according to claim 1 , wherein the conductive wires are wavy shape.

10. The foldable panel according to claim 1 , wherein the conductive wires are chain structures formed of multiple conductive rings connected to each other.

11. The foldable panel according to claim 10 , wherein connecting parts of two adjacent conductive rings of the conductive wires are staggered.

12. A method of manufacturing a foldable panel, wherein the foldable panel comprises a flexible display panel and a driver IC, the driver IC is arranged at a bonding end of a flexible substrate of the flexible display panel, and the bonding end is bent backward to the contrary direction of light side of the flexible display panel, so that the driver IC is located at back of the flexible substrate; a thin film wiring layer connected between an active area and the driver IC is further arranged on the flexible substrate, one surface of the thin film wiring layer is provided with conductive wires connected to the flexible display panel and the driver IC respectively; the method of manufacturing a foldable panel comprising the steps of:
bonding the driver IC at the bonding end of the flexible substrate;
producing same number of first bonding terminals and second bonding terminals close to the active area and the driver IC respectively at the bonding end of the flexible substrate;
manufacturing a thin film wiring layer on the flexible substrate, and connecting conductive wires of the thin film wiring layer to corresponding ends of the first and the second bonding terminals respectively;
bending the bonding end, to make the driver IC locate on back of the flexible substrate.

13. The method of manufacturing a foldable panel according to claim 12 , wherein the conductive wires are disposed at inner surface of the thin film wiring layer and opposite from the flexible substrate.

14. The method of manufacturing a foldable panel according to claim 12 , wherein the bonding end of the flexible substrate is arranged a plurality of first bonding terminals close to the active area and a plurality of second bonding terminals close to the driver IC, the number of the first bonding terminals and the second bonding terminals are the same, the first bonding terminals are connected the second bonding terminals one to one by the thin film wiring layer.

15. The method of manufacturing a foldable panel according to claim 14 , wherein at least two of the conductive wires are connected between each of the first and the second bonding terminals.

16. The method of manufacturing a foldable panel according to claim 12 , wherein the driver IC is directly bonded on the flexible substrate or is bonded on the flexible substrate by a flexible circuit board.

17. The method of manufacturing a foldable panel according to claim 12 , wherein a reinforcing plate is further bonded on back side of the bonding end of the flexible substrate, the reinforcing plate at least covers back side of the driver IC where is disposed on the bonding end.

18. The method of manufacturing a foldable panel according to claim 12 , wherein the conductive wires are wavy shape.

19. The method of manufacturing a foldable panel according to claim 12 , wherein the conductive wires are chain structures formed of multiple conductive rings connected to each other, and connecting parts of two adjacent conductive rings of the conductive wires are staggered to each other.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Liu Minlun

Classifications

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• H05K2201/10128

  Display · CPC title

• H05K2201/055

  Folded back on itself · CPC title

• H05K1/028

  Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence) · CPC title

• H05K1/189 Primary

  characterised by the use of flexible or folded printed circuits · CPC title