CN107863001B

CN107863001B - Flexible screen and flexible display device

Info

Publication number: CN107863001B
Application number: CN201711298876.9A
Authority: CN
Inventors: 李高敏; 史凯兴; 周文斌
Original assignee: Kunshan Visionox Technology Co Ltd
Current assignee: Suzhou Qingyue Optoelectronics Technology Co Ltd
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2020-02-07
Anticipated expiration: 2037-12-08
Also published as: CN107863001A

Abstract

The invention provides a flexible screen and a flexible display device, which comprise a flexible substrate, a display device, a driving chip and a metal conducting wire, wherein the flexible substrate comprises a first area and a second area; the display device is arranged in the first area and is provided with a length boundary and a width boundary which are perpendicular to each other; the second region is located outside the region that can be reached by the display device extending outward along the length boundary or the width boundary; the driving chip is arranged in the second area; the metal conducting wire is arranged on the flexible substrate and is electrically connected with the driving chip and the display device. According to the flexible screen and the flexible display device, the driving chip is not affected under the condition that the display device is bent in multiple dimensions, and the condition that the driving chip is unstably bonded in the display screen is avoided.

Description

Flexible screen and flexible display device

Technical Field

The invention relates to the technical field of display, in particular to a flexible screen and a flexible display device.

Background

The flexible screen refers to an image display device realized by generating a flexible substrate using a plastic or polymer film. The flexible screen may be configured as a Liquid Crystal Display (LCD), an Organic Light Emitting Diode Display (OLED), an electronic ink Display, or the like.

In the prior art, a flexible screen includes a display panel, a driving chip, and a flexible circuit board (FPC). Usually, the driving chip is bonded to the back of the display panel through a hot pressing process, and the flexible circuit board is rigidly bonded to one end of the display panel through the pad and electrically connected to the display panel. The existing flexible screen is complex in process, metal pins of the bonding area are in rigid joint with the driving chip, and when the flexible screen is bent, the driving chip is easy to separate from pins, the driving chip is broken, even the screen body of the bonding area cracks, and finally the display picture of the flexible screen fails.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a flexible screen and a flexible display device, wherein the flexible screen is bent in multiple dimensions.

In order to solve the above technical problems, the present invention provides a display device including a flexible substrate, a display device, a driving chip, and a metal conductive line; the flexible substrate comprises a first region and a second region; the display device is arranged in the first area and is provided with a length boundary and a width boundary which are perpendicular to each other; the second region is located outside of an area accessible by the display device extending outwardly along the length boundary and the width boundary; the driving chip is arranged in the second area; the metal conducting wire is arranged on the flexible substrate and is electrically connected with the driving chip and the display device.

Further, a wiring groove is formed on the flexible substrate, and the metal conductive wires are arranged in the wiring groove.

Further, the flexible screen further comprises an insulating film arranged on the metal conducting wire, and the metal conducting wire is clamped between the flexible substrate and the insulating film and forms an integrated structure.

Further, the insulating film is the same material as the flexible substrate.

Further, the insulating film and the flexible substrate are made of polyimide.

Further, the metal conducting wire is made of copper, gold-copper alloy or silver-copper alloy.

Further, the display device has a first terminal, the driver chip has a second terminal, and the metal conductive line is flexibly bonded to the first and second terminals.

Further, the flexible substrate further includes a third region connecting the first region and the second region.

Further, the flexible screen further comprises a detection sensor for detecting bending information of the display device, the detection sensor is located in the first area or the second area, and the detection sensor is electrically connected with the metal conducting wire.

Meanwhile, the invention also provides a flexible display device which comprises the flexible screen.

Compared with the prior art, the flexible screen and the flexible device have the advantages that the driving chip is arranged outside the region which can be reached by the display device extending outwards along the length boundary or the width boundary, the arrangement of the flexible circuit board is omitted, the metal conducting wire is arranged on the flexible substrate, so that the display device can be bent along multiple dimensions, the driving chip cannot be influenced under the condition that the display device is bent in multiple dimensions, and the problem of failure of a display picture of the flexible screen caused by the phenomena that the driving chip is separated from a pin, the driving chip is broken, and even a screen body of a bonding area is cracked is effectively solved.

Drawings

Fig. 1 is a schematic top view of a flexible screen according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1, the present invention provides a flexible screen 100, which includes a flexible substrate 1, a display device 11, a driving chip 12, and a metal conductive line 13, where the display device 11, the driving chip 12, and the metal conductive line 13 are all disposed on the flexible substrate 1.

The flexible substrate 1 is produced from a plastic or polymer film, for example, a Polyimide (PI) flexible substrate. The flexible substrate 1 comprises a first region 101, a second region 102 and a third region 103, wherein the third region 103 connects the first region 101 and the second region 102, the display device 11 is arranged in the first region 101 to form a display part and is provided with length boundaries (Y1, Y2) and width boundaries (X1, X2) which are perpendicular to each other; the second region 102 is located outside the region that is accessible by the display device 11 along the length and width boundaries extending outward. The driving chip 12 is disposed at the second region 102 of the flexible substrate 1. The metal conductive line 13 is disposed on the flexible substrate (covering the second region 102 and the third region 103), and is electrically connected to the display device 11 and the driving chip 12. Wherein the conductive metal line 13 in the second region 102 is further electrically connected to peripheral circuits (not shown). The display device can be bent in multiple dimensions.

The display can be bent in multiple dimensions in the invention, which means that the display can be bent in a first direction parallel to the length boundary of the display, and can also be bent in a second direction having an included angle range of 0-180 ° with the first direction, for example, the second direction can be a direction perpendicular to the first direction. The driving chip 12 is disposed in the second region 102 different from the first region 101, so that the display device 11 can be bent arbitrarily along multiple dimensions, and the driving chip 12 and the electrical connection between the driving chip 12 and the metal conductive line 13 are not affected.

In one embodiment, the third region 103 includes two connection terminals, and the first region 101 and the second region 102 are respectively connected to the two connection terminals of the third region 103. The extension lines extending outwards from the two connecting ends of the third area 103 preferably do not fall on the same straight line, but the extension lines extending outwards from the two connecting ends of the third area 103 may also fall on the same straight line, and more preferably, the extension lines extending outwards from the two connecting ends of the third area 103 are parallel to each other, or have an included angle greater than 0 ° and smaller than 180 °. In this embodiment, as shown in fig. 1, the outwardly extending extension lines of the two connecting ends of the third region 103 are perpendicular to each other, and the two connecting ends are connected by an arc-shaped corner transition portion.

In an embodiment, the display device 11 may be selected from LCD, OLED, AMOLED, or the like. A first terminal (not shown) is disposed on a side of the display device 11 close to the width boundary X1, the metal conductive line 13 located in the third region 103 is electrically connected to the first terminal, and the electrical connection is flexible bonding, so that when the display device 11 is bent in multiple dimensions, the metal conductive line 13 and the display device 11 have strong bonding stability.

In an embodiment, the driving chip 12 is used to provide driving signals to the display device 11. The driver chip 12 may be disposed at any position of the second region 102. The driver chip 12 has a second terminal for electrical connection, which in one embodiment is a number of metal pins (not shown) disposed around the periphery of the driver chip 12. In the present embodiment, the driving chip 12 and the metal conductive line 13 are flexibly bonded, that is, the metal conductive line 13 is electrically connected to the pins of the driving chip 12, for example, by tin plating.

In an embodiment, the metal conductive line 13 is disposed on the flexible substrate 1, the metal conductive line 13 may be formed on the flexible substrate 1 by a sputtering process or a printing process, and the metal conductive line 13 is arranged on the flexible substrate 1 in a form of a circuit board. In another embodiment, a wiring groove is formed on the flexible substrate 1, and the metal conductive lines are arranged in the wiring groove. In this embodiment, the specific steps of the metal conductive line 13 are as follows: a wiring groove is formed on the flexible substrate 1 by etching, and a metal conductive wire 13 is integrally formed by pouring a metal liquid into the wiring groove. At this time, the metal conductive line 13 is electrically connected to the first terminal of the display device 1 and the second terminal of the driving chip 12, and the portion of the metal conductive line 13 located in the third region 103 is further electrically connected to the peripheral circuit. The driving chip 12 is supplied with an electric signal from a peripheral circuit, and the driving chip 12 further supplies a driving signal to the display device 11. The metal conductive wire 13 is made of copper, gold-copper alloy or silver-copper alloy.

In one embodiment, on the second region 102 and the third region 103, an insulating film (not shown) is further covered above the metal conductive line 13 for shielding the protective cover metal conductive line 13, and in the second region 102, the insulating film covers a portion outside the driving chip 12. The metal conductive line 13 is sandwiched between the flexible substrate 1 and the insulating film. In one embodiment, the insulating film and the flexible substrate 1 are made of the same material, for example, Polyimide (PI), and the metal conductive line 13 is integrally formed between the insulating film and the flexible substrate 1 made of the same material (for example, polyimide). Therefore, the Flexible Printed Circuit (FPC) is replaced, the connection stability of the metal conducting wire 13, the display device 11 and the driving chip is improved, and the flexibility of the display device 11 is improved better, so that the flexible printed circuit is suitable for multi-dimensional bending.

Referring to fig. 1, in one embodiment, the flexible screen 100 further includes at least one detection sensor 14 for detecting bending information of the display device 11. The detecting sensor 14 is located in the first region 101, and the detecting sensor 14 is electrically connected to the metal conductive line 13. The detection sensor 14 may include a bending angle detection sensor, a bending position detection sensor, a bending dimension detection sensor, or the like. The bending angle detection sensor may have an early warning function, and perform early warning when the bending angle is greater than a preset maximum bending angle. The bending position detection sensor is provided in the second region 102, and performs warning when the bending position is detected in the second region 102. The bending dimension detection sensor can correspondingly adjust the picture displayed by the flexible screen when the bending dimensions are different, for example, the distorted picture after bending is adjusted to the picture in a normal visual state.

According to the flexible screen and the flexible device, the display device 11 and the driving chip 12 are respectively arranged in different areas, so that the display device 11 can be bent in multiple dimensions, and meanwhile, the driving chip cannot be influenced when the display screen is bent in multiple dimensions by adopting a flexible bonding mode among the display device 11, the driving chip 12 and the metal conducting wire 13, so that the situation that the driving chip 12 is bonded in the flexible screen 100 unstably is avoided.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make many variations and modifications of the technical solution of the present invention without departing from the scope of the technical solution of the present invention by using the above disclosure, and the technical solution of the present invention is covered by the claims.

Claims

1. A flexible screen, comprising: the display device comprises a flexible substrate, a display device, a driving chip and a metal conducting wire; the flexible substrate comprises a first region and a second region; the display device is arranged in the first area and is provided with a length boundary and a width boundary which are perpendicular to each other; the second region is located outside of an area accessible by the display device extending outwardly along the length boundary and the width boundary; the driving chip is arranged in the second area; the metal conducting wire is arranged on the flexible substrate and is electrically connected with the driving chip and the display device.

2. The flexible screen of claim 1, wherein the flexible substrate has a wiring slot formed therein, and the metal conductive lines are routed in the wiring slot.

3. A flexible screen according to claim 1 or 2, further comprising an insulating film disposed on the metal conductive line, the metal conductive line being sandwiched between the flexible substrate and the insulating film.

4. A flexible screen according to claim 3, wherein the insulating film is of the same material as the flexible substrate.

5. A flexible screen according to claim 4, characterised in that the material of the insulating film and the flexible substrate is polyimide.

6. A flexible screen according to claim 1, wherein the material of the metallic conductive wire is copper, gold copper alloy or silver copper alloy.

7. The flexible screen of claim 1, wherein the display device has a first terminal, the driver chip has a second terminal, and the metal conductive line is flexibly bonded to the first and second terminals.

8. A flexible screen according to claim 1, wherein the flexible substrate further comprises a third region connecting the first and second regions.

9. The flexible screen of claim 1, further comprising a detection sensor for detecting bending information of a display device, wherein the detection sensor is located in the first area or the second area, and the detection sensor is electrically connected to the metal conductive wire.

10. A flexible display device, characterized in that the flexible display device comprises a flexible screen according to any one of claims 1-9.