Testing device for flexible screen

Patent metadata

Field	Value
Publication number	US-11828675-B2
Application number	US-202217667971-A
Country	US
Kind code	B2
Filing date	Feb 9, 2022
Priority date	Jan 10, 2020
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

An apparatus for testing a flexible screen. The apparatus for testing a flexible screen includes a slide rail, a reel, a clamping module and a drive module. The reel is fixed to one end of the slide rail. The axial direction of the reel is perpendicular to the extension direction of the slide rail. The flexible screen includes a first end and a second end which are disposed opposite to each other. The reel is configured to fix the first end of the flexible screen and rotate to drive the flexible screen to fit to the reel and coil around the reel. The clamping module is configured to clamp the second end of the flexible screen. The reel is further configured to rotate to drive, through the flexible screen, the clamping module to slide along the slide rail towards the reel.

First claim

What is claimed is:

1. An apparatus configured to test a flexible screen, the apparatus comprising:
a slide rail;
a reel, wherein the reel is secured to an end of the slide rail, an axial direction of the reel is perpendicular to an extension direction of the slide rail, the flexible screen comprises a first end and a second end which are disposed opposite to each other, and the reel is configured to fix the first end of the flexible screen and rotate to drive the flexible screen to both fit to the reel and coil around the reel;
a clamp, wherein the clamp is configured to clamp the second end of the flexible screen, the reel is further configured to rotate to drive, through the flexible screen, the clamp to slide along the slide rail in a direction towards the reel, and the clamp comprises a pressure sensor configured to detect tension received by the flexible screen in the extension direction of the slide rail and generate a tension detection signal; and
a driver configured to adjust a rotation angular velocity of the reel according to the tension detection signal.

2. The apparatus of claim 1 , wherein the clamp further comprises:
a first clamp and a second clamp which are disposed opposite to each other, wherein the first clamp and the second clamp are located on two sides of a clamped portion of the flexible screen; and the pressure sensor further comprises:
a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is disposed in the first clamp and the second pressure sensor is disposed in the second clamp.

3. The apparatus of claim 2 , wherein both the first pressure sensor and the second pressure sensor further comprises a resistance strain gauge.

4. The apparatus of claim 3 , wherein at least one of the first clamp or the second clamp further comprises a vacuum adsorbent layer located on a side of a corresponding pressure sensor facing the flexible screen, wherein the vacuum adsorbent layer is disposed in contact with a corresponding surface of the flexible screen and the vacuum adsorbent layer is configured to perform vacuum adsorption on the corresponding surface.

5. The apparatus of claim 3 , wherein both the first clamp and the second clamp further comprises a resilient element, a resilient element of the first clamp and a resilient element of the second clamp are disposed opposite to each other and both the first clamp and the second clamp are is located on a side of a corresponding pressure sensor facing away from the flexible screen.

6. The apparatus of claim 2 , wherein at least one of the first clamp or the second clamp further comprises:
a vacuum adsorbent layer located on a side of a corresponding pressure sensor facing the flexible screen, wherein the vacuum adsorbent layer is disposed in contact with a corresponding surface of the flexible screen and the vacuum adsorbent layer is configured to perform vacuum adsorption on the corresponding surface.

7. The apparatus of claim 6 , wherein both the first clamp and the second clamp further comprises the vacuum adsorbent layer, the vacuum adsorbent layer comprises a plurality of vacuum adsorbent holes, an edge of a side wall of each of the plurality of vacuum absorbent holes is in contact with the corresponding surface of the flexible screen, and a plurality of vacuum adsorbent holes in the first clamp and a plurality of vacuum adsorbent holes in the second clamp are disposed in a one-to-one correspondence in a direction in which the first clamp and the second clamp are disposed opposite to each other.

8. The apparatus of claim 6 , wherein the vacuum adsorbent layer is a flexible material layer.

9. The apparatus of claim 8 , wherein the flexible material layer is made of silica gel or ethylene propylene diene monomer.

10. The apparatus of claim 2 , wherein both the first clamp and the second clamp further comprise a resilient element, a resilient element of the first clamp and a resilient element of the second clamp are disposed opposite to each other, and each resilient element is located on a side of the corresponding pressure sensor facing away from the flexible screen.

11. The apparatus of claim 10 , wherein the resilient element comprises a spring.

12. The apparatus of claim 2 , wherein the first pressure sensor is further configured to detect the tension received by a side of the second end of the flexible screen facing the first clamp in the extension direction of the slide rail and generate a first tension detection signal;
the second pressure sensor is further configured to detect the tension received by a side of the second end of the flexible screen facing the second clamp in the extension direction of the slide rail and generate a second tension detection signal; and
the driver is configured to adjust the rotation angular velocity of the reel according to a first tension detection signal and a second tension detection signal.

13. The apparatus of claim 12 , wherein the driver is further configured to:
maintain the rotation angular velocity of the reel in a case when tension corresponding to the first tension detection signal and tension corresponding to the second tension detection signal are within a testing threshold range;
reduce the rotation angular velocity of the reel in a case when at least one of tension corresponding to the first tension detection signal or tension corresponding to the second tension detection signal is greater than a maximum value of the testing threshold range; and
increase the rotation angular velocity of the reel in a case when at least one of tension corresponding to the first tension detection signal or tension corresponding to the second tension detection signal is less than a minimum value of the testing threshold range.

14. The apparatus of claim 1 , further comprising:
a coil number detector configured to detect a number of coils of the flexible screen on the reel and generate a coil number detection signal, wherein the driver is further configured to adjust the rotation angular velocity of the reel according to a coil number detection signal.

15. The apparatus of claim 14 , wherein the coil number detection signal is an angular velocity matching signal of the reel obtained according to a matching relationship between the number of coils of the flexible screen and a coil radius of the flexible screen.

16. The apparatus of claim 1 , wherein the reel is provided with a slot, an extension direction of the slot is parallel to the axial direction of the reel, the first end of the flexible screen is fixed on a surface of the slot adjacent to an axis of the reel and the reel is further configured to rotate to drive the flexible screen to fit to the reel and coil around the reel.

17. The apparatus of claim 16 , wherein the slot comprises a first side wall and a second side wall that are sequentially disposed in a rotation direction of the reel, and the first side wall is bent in a direction opposite to the rotation direction of the reel.

18. The apparatus of claim 17 , wherein a curvature of the first side wall bent is the same as a curvature of the reel.

19. The apparatus of claim 16 , wherein the first end of the flexible screen is fixed in a pneumatic manner or in a mechanical manner.

20. The apparatus of claim 1 , wherein the driver is further configured to:
maintain the rotation angular velocity of the reel when the tension corresponding to the tension detection signal is maintained within a testing threshold range;
reduce the rotation angular velocity of the reel when th

Assignees

• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Dong Shuanzhu
• Liu Manna

Classifications

• G01M11/08 Primary

  Testing mechanical properties {(G01M11/005 takes precedence)} · CPC title

• G01N3/26

  Investigating twisting or coiling properties · CPC title

• G01M99/007 Primary

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

• G01L5/103

  using sensors fixed at one end of the flexible member · CPC title

• G01L5/045

  for measuring the tension across the width of a band-shaped flexible member (measuring flatness G01B) · CPC title