Bending test device and system for flexible display device

Patent metadata

Field	Value
Publication number	US-10557781-B2
Application number	US-201715735311-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	Aug 28, 2017
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A bending test device and system for a flexible display device is provided. The bending test device has a bending device. The bending device has a bending shaft, an upper bending plate, and a lower fixing plate. An upper clamping plate is disposed on a surface of the upper bending plate. The upper clamping plate is configured to slide along the surface of the upper bending plate. A lower clamping plate is disposed on a surface of the lower fixing plate. The lower clamping plate is configured to slide along the surface of the lower fixing plate. A first tension measuring element connects to an end of the upper clamping plate. A second tension measuring element connects to an end of the lower clamping plate.

First claim

What is claimed is:

1. A bending test device for a flexible display device, comprising:
a bending device comprising a bending shaft, an upper bending plate, and a lower fixing plate, wherein the bending shaft is disposed between the upper bending plate and the lower fixing plate, an end of the upper bending plate is fixedly connected to the bending shaft, the bending shaft is configured to rotate to move the upper bending plate to rotate toward the lower fixing plate, and the lower fixing plate is fixed on a workbench;
an upper clamping plate disposed on a surface of the upper bending plate, wherein the upper clamping plate is configured to slide along the surface of the upper bending plate, a surface of the upper clamping plate that is away from the upper bending plate is an upper placing surface for the flexible display device, and the upper placing surface for the flexible display device is provided with a first fixing clip configured to fix an upper portion of the flexible display device;
a lower clamping plate disposed on a surface of the lower fixing plate, wherein the lower clamping plate is configured to slide along the surface of the lower fixing plate, a surface of the lower clamping plate that is away from the lower fixing plate is a lower placing surface for the flexible display device, and the lower placing surface for the flexible display device is provided with a second fixing clip configured to fix a lower portion of the flexible display device;
a first tension measuring element disposed on an upper portion of the upper bending plate and connected to an end of the upper clamping plate that is away from the bending shaft;
a second tension measuring element disposed on a lower portion of the lower fixing plate and connected to an end of the lower clamping plate that is away from the bending shaft, and a flexible connection is at least formed between the first tension measuring element and the upper clamping plate, or formed between the second tension measuring element and the lower clamping plate; and
a motion device connected to at least one end of the bending shaft and configured to drive the bending shaft to rotate, wherein the bending shaft and a connecting end of the motion device are provided with a gear, the motion device comprises a motor and a crank slider mechanism, the crank slider mechanism comprises a cam and a rack, the motor is connected to the cam through a driving shaft, the rack is connected to an edge of the cam through a connecting rod, the crank slider mechanism is configured to convert rotational motion of the motor to rectilinear motion of the rack, the rack is engaged with the gear of the bending shaft, and the rectilinear motion of the rack is converted to rotational motion of the gear so that the bending shaft rotates;
wherein a shaft sleeve is disposed on the bending shaft, at least one bearing is disposed in the shaft sleeve so that the shaft sleeve and the flexible display device have synchronized movement.

2. A bending test device for a flexible display device, comprising:
a bending device comprising a bending shaft, an upper bending plate, and a lower fixing plate, wherein the bending shaft is disposed between the upper bending plate and the lower fixing plate, an end of the upper bending plate is fixedly connected to the bending shaft, the bending shaft is configured to rotate to move the upper bending plate to rotate toward the lower fixing plate, and the lower fixing plate is fixed on a workbench;
an upper clamping plate disposed on a surface of the upper bending plate, wherein the upper clamping plate is configured to slide along the surface of the upper bending plate, a surface of the upper clamping plate that is away from the upper bending plate is an upper placing surface for the flexible display device, and the upper placing surface for the flexible display device is provided with a first fixing clip configured to fix an upper portion of the flexible display device;
a lower clamping plate disposed on a surface of the lower fixing plate, wherein the lower clamping plate is configured to slide along the surface of the lower fixing plate, a surface of the lower clamping plate that is away from the lower fixing plate is a lower placing surface for the flexible display device, and the lower placing surface for the flexible display device is provided with a second fixing clip configured to fix a lower portion of the flexible display device;
a first tension measuring element disposed on an upper portion of the upper bending plate and connected to an end of the upper clamping plate that is away from the bending shaft; and
a second tension measuring element disposed on a lower portion of the lower fixing plate and connected to an end of the lower clamping plate that is away from the bending shaft;
wherein a shaft sleeve is disposed on the bending shaft, at least one bearing is disposed in the shaft sleeve so that the shaft sleeve and the flexible display device have synchronized movement.

3. The bending test device for the flexible display device according to claim 2 , wherein the bending test device further comprises an angle plate, the angle plate is disposed on the bending shaft and located at a side of the upper bending plate, the angle plate is formed with an angular scale.

4. The bending test device for the flexible display device according to claim 2 , wherein a flexible connection is at least formed between the first tension measuring element and the upper clamping plate, or formed between the second tension measuring element and the lower clamping plate.

5. The bending test device for the flexible display device according to claim 2 , wherein a surface of upper bending plate is disposed with a first slide, and the upper clamping plate is disposed with a first chute corresponding to the first slide, the first chute slides along the first slide so that the upper clamping plate slides along the surface of the upper bending plate; a surface of lower fixing plate is disposed with a second slide, and the lower clamping plate is disposed with a second chute corresponding to the second slide, the second chute slides along the second slide so that the lower clamping plate slides along the surface of the lower fixing plate.

6. The bending test device for the flexible display device according to claim 2 , wherein the bending test device further comprises a motion device, the motion device is connected to at least one end of the bending shaft and configured to drive the bending shaft to rotate.

7. The bending test device for the flexible display device according to claim 6 , wherein the bending shaft and a connecting end of the motion device are provided with a gear, the motion device comprises a motor and a crank slider mechanism, the crank slider mechanism comprises a cam and a rack, the motor is connected to the cam through a driving shaft, the rack connects to an edge of the cam through a connecting rod, the crank slider mechanism is configured to convert a rotational motion of the motor to a rectilinear motion of the rack, the rack is engaged with to the gear of the bending shaft, and the rectilinear motion of the rack is converted to a rotational motion of the gear so that the bending shaft rotates.

8. The bending test device for the flexible display device according to claim 7 , wherein the motor is connected to the driving shaft through a transmission belt.

9. A bending test system for a flexible display device including a plurality of bending test devices according to claim 2 .

10. The bending test system for the flexible display device according to claim 9 , wherein each of two adjacent bending test devices are driven through a transmission belt disposed on a driving shaft

Assignees

• Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd
• Wuhan China Star Optoelectronics Semiconductor Display Technoloy Co Ltd

Inventors

• Han Wen
• Ma Rong
• Liu Jichuan

Classifications

• G01N3/20 Primary

  by applying steady bending forces (G01N3/26, G01N3/28 take precedence) · CPC title

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title

• G01M99/007

  by applying a load, e.g. for resistance or wear testing (G01M99/001 takes precedence; testing the elasticity of structures G01M5/00) · CPC title

• G01N2203/0282

  Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes · CPC title

• G01N2203/0023

  Bending · CPC title