CONTROL APPARATUS AND METHOD OF ADDRESSING TWO-DIMENSIONAL SIGNAL

• US 20150002430A1
• Filed: 06/30/2014
• Published: 01/01/2015
• Est. Priority Date: 07/01/2013
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: AHN, CHANG-GEUN
• Granted Patent: US 9,471,174 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers

Abstract

Provided is a control apparatus which may apply an electric signal to a specific point or area selected from a plane or may receive the signal from the specific point or area. The control apparatus includes an upper electrode and a lower electrode. When it is intended that an electric field is applied to a point in which the upper electrode and the lower electrode come in contact with each other, an electrical bias is applied to the lower electrode, and the upper electrode is maintained in a non-connected state. When it is intended that the bias is selectively applied, the upper electrode is maintained in a grounded state. Therefore, transferring of the field from the lower electrode to a ground electrode disposed at a bottom is shielded, and thus transferring of the electric signal is also blocked.

Claims

1. A control apparatus for two-dimensionally addressing a signal, the apparatus comprising:

a bottom electrode disposed under a control target to be spaced apart;

a first electrode part disposed above the control target and arranged in a first direction to define a plurality of device cells in an array shape; and

a second electrode part configured to define the plurality device cells together with the first electrode part at a plurality of crossover points and arranged in a second direction perpendicular to the first direction to selectively generate a field shielding effect at the plurality of crossover points according to a biasing condition.

2. The control apparatus of claim 1, wherein three surfaces of the first electrode part are enclosed by the second electrode part.

3. The control apparatus of claim 1, wherein a vertically lowest portion of the first electrode part is provided at a higher position than that of the second electrode.

4. The control apparatus of claim 1, wherein a vertically lowest portion of the first electrode is provided on the same horizontal position as that of the second electrode.

5. The control apparatus of claim 1, wherein, when the first electrode part is divided into a plurality of sub electrodes, the second electrode part is provided to enclose the sub electrodes.

6. A control apparatus for two-dimensionally addressing a signal, the apparatus comprising:

a bottom electrode disposed under a piezo material or an liquid crystal device to be spaced apart;

a lower electrode part disposed above the piezo material or the liquid crystal device and arranged in a first direction to define a plurality of device cells in an array shape; and

an upper electrode part configured to define the plurality device cells together with the lower electrode part at a plurality of crossover points and arranged in a second direction perpendicular to the first direction to selectively generate a field shielding effect at the plurality of crossover points according to a biasing condition.

7. The control apparatus of claim 6, wherein the lower electrode part is an electrode to which a bias voltage is applied.

8. The control apparatus of claim 7, wherein the upper electrode part is an electrode which is in a floating state or to which a ground voltage is applied.

9. A control method of two-dimensionally addressing a signal, the method comprising:

disposing a bottom electrode under a control target to be spaced apart;

providing a lower electrode and an upper electrode above the control target; and

maintaining the upper electrode in a floating state and applying an electrical bias to the lower electrode when it is intended that an electric field is generated at a point in which the upper electrode and the lower electrode come in contact with each other.

10. The method of claim 9, wherein a vertically lowest portion of the lower electrode part is located at a higher position than that of the upper electrode part, or

the vertically lowest portion part of the lower electrode is located on the same horizontal position as that of the upper electrode part.

11. The method of claim 9, wherein, when it is intended that transferring of the field to a device cell provided at the point in which the upper electrode and the lower electrode come in contact with each other is shielded, a ground voltage is applied to the upper electrode in a state in which the electric bias is applied to the lower electrode, and thus the transferring of the field from the lower electrode to the bottom electrode is shielded.

12. The control apparatus of claim 11, wherein the device cell is a piezo element configured to generate vibration by the field.