Acceleration sensor, display device, detecting system and detecting method

Patent metadata

Field	Value
Publication number	US-9869693-B2
Application number	US-201615310348-A
Country	US
Kind code	B2
Filing date	Mar 3, 2016
Priority date	Sep 24, 2015
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

An acceleration sensor, a display device, a detecting system and a detecting method are provided; the acceleration sensor includes two electrodes arranged opposite to and insulated from each other, and a cavity arranged between the two electrodes; a liquid layer is arranged in the cavity, and the liquid layer occupies a portion of internal space of the cavity. A display device integrated with the acceleration sensor has advantages such as high degree of integration, compact structure and low production cost and so on.

First claim

What is claimed is:

1. A detecting system for a display device, the display device comprising at least three acceleration sensors, and
each of the acceleration sensors comprising:
two electrodes arranged opposite to and insulated from each other, and
a cavity arranged between the two electrodes,
wherein, a liquid layer is arranged in the cavity, and the liquid layer occupying a portion of internal space of the cavity; and
the detecting system comprising:
a signal receiving module, configured to acquire capacitance values of the at least three acceleration sensors at a first time and capacitance values of the at least three acceleration sensors at a second time, respectively;
a calculating module, configured to respectively calculate a capacitance value change amount of each of the acceleration sensors according to the capacitance value at the first time and the capacitance value at the second time, respectively calculate a sensing result of each of the acceleration sensors according to the capacitance value change amount, and calculate an absolute value of a difference between a sensing result of each of the acceleration sensors and a sensing result of each of the remaining acceleration sensors; and
a judging module, configured to determine whether the absolute value is in a predetermined threshold range, wherein, if an absolute value of a difference between a sensing result of one acceleration sensor and a sensing result of each of at least two of the remaining acceleration sensors is out of the predetermined threshold range, the sensing result of the acceleration sensor is determined not in a normal range,
wherein, the sensing result is an acceleration or a displacement.

2. The detecting system for the display device according to claim 1 , wherein, the cavity has an inner surface, and a gap is formed between the liquid layer and the inner surface.

3. The detecting system for the display device according to claim 2 , wherein, the gap is filled with an insulating gas, the insulating gas having a dielectric constant different from that of liquid in the liquid layer.

4. The detecting system for the display device according to claim 3 , wherein, the insulating gas is immiscible with the liquid in the liquid layer.

5. The detecting system for the display device according to claim 1 , each of the acceleration sensors further comprising: a solid insulating layer, arranged between the liquid layer and one of the two electrodes.

6. The detecting system for the display device according to claim 1 , wherein, the display device has a display region and a sensing region, and comprises an array substrate having a first base substrate and an opposed substrate arranged opposite to the array substrate and having a second base substrate;
in the sensing region, each of the acceleration sensors is arranged between the first base substrate and the second base substrate;
in the display region, an electrowetting structure is arranged between the first base substrate and the second base substrate, and the electrowetting structure includes:
two transparent electrodes arranged opposite to each other, and
a display region hydrophobic layer, a display region first fluid layer and a display region second fluid layer which are arranged between the two transparent electrodes, the display region first fluid layer being arranged between the display region hydrophobic layer and the display region second fluid layer in a direction perpendicular to a plane where the first base substrate is located.

7. The detecting system for the display device according to claim 6 , wherein,
one of the two electrodes of each of the acceleration sensors and one of the two transparent electrodes of the electrowetting structure are arranged in a same layer; or
the two electrodes of each of the acceleration sensors and the two transparent electrodes of the electrowetting structure are arranged in same layers, respectively.

8. The detecting system for the display device according to claim 6 , wherein, the display region hydrophobic layer of the electrowetting structure includes a portion extending to the sensing region; the cavity of each of the acceleration sensors comprises a sidewall, the sidewall being connected with the portion of the display region hydrophobic layer extending to the sensing region.

9. The detecting system for the display device according to claim 6 , wherein, the display region first fluid layer of the electrowetting structure and the liquid layer of each of the acceleration sensors are made of a same material.

10. The detecting system for the display device according to claim 6 , wherein,
a first thin film transistor and a second thin film transistor are arranged between the first base substrate and the second base substrate;
one of the two transparent electrodes of the electrowetting structure is electrically connected with the first thin film transistor; and
one of the two electrodes of each of the acceleration sensors is electrically connected with the second thin film transistor.

11. The detecting system for the display device according to claim 6 , wherein,
a plurality of the electrowetting structures sequentially arranged in a direction perpendicular to a plane where the first base substrate is located are arranged between the first base substrate and the second base substrate in the display region.

12. The detecting system for the display device according to claim 11 , wherein, a third base substrate is further arranged between the first base substrate and the second base substrate, the third base substrate being arranged between the two adjacent electrowetting structures.

13. The detecting system for the display device according to claim 11 , wherein,
in the sensing region, a plurality of the acceleration sensors are arranged between the first base substrate and the second base substrate, and two electrodes of at least one of the acceleration sensors are respectively arranged in same layers as two transparent electrodes of one of the plurality of the electrowetting structures.

14. A detecting method for a display device, the display device comprising at least three acceleration sensors, and
each of the acceleration sensors comprising:
two electrodes arranged opposite to and insulated from each other, and
a cavity arranged between the two electrodes,
wherein, a liquid layer is arranged in the cavity, and the liquid layer occupying a portion of internal space of the cavity; and
the detecting method comprising:
acquiring capacitance values of the at least three acceleration sensors at a first time and capacitance values of the at least three acceleration sensors at a second time, respectively;
respectively calculating an a capacitance value change amount of each of the acceleration sensors according to the capacitance value at the first time and the capacitance value at the second time, respectively calculate a sensing result of each of the acceleration sensors according to the capacitance value change amount, and calculate an absolute value of a difference between a sensing result of each of the acceleration sensors and a sensing result of each of the remaining acceleration sensors; and
determining whether the absolute value is in a predetermined threshold range, wherein, if an absolute value of a difference between a sensing result of one acceleration sensor and a sensing result of each of at least two of the remaining acceleration sensors is out of the predetermined threshold range, the sensing result of the acceleration sensor is determined not in a normal range,
wherein, the sensing result is an acceleration or a displacement.

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Yang Jiuxia
• Wang Zhidong

Classifications

• G01P15/0802

  Details · CPC title

• G02B26/005

  based on electrowetting · CPC title

• G01P1/07

  Indicating devices, e.g. for remote indication (indicating working conditions of vehicles G07C5/00) · CPC title

• G01P15/125 Primary

  by capacitive pick-up · CPC title

• G01P15/006

  by making use of fluid seismic masses · CPC title