Control apparatus and method of addressing two-dimensional signal

• US 9,471,174 B2
• Filed: 06/30/2014
• Issued: 10/18/2016
• 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
• Primary Examiner(s): Boddie, William
• Assistant Examiner(s): EARLES, BRYAN E
• Application Number:
  US14/320,418
• Publication Number:
  US 20150002430A1
• Time in Patent Office: 841 Days
• US Class Current: 1/1
• 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 control target,

a bottom electrode disposed under the control target;

a first electrode part disposed above the control target and arranged in a first direction; and

a second electrode part disposed above the control target and arranged in a second direction perpendicular to the first direction,

wherein the first electrode part and the second electrode part are configured to define a plurality of device cells at a plurality of crossover points of the first and second electrode parts, and

wherein the second electrode part controls, according to a bias condition, a field applied to the control target by selectively generating a field shielding effect at the plurality of crossover points.

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 a vertically lowest portion 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 a vertically lowest portion 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 control target including a piezo material or a liquid crystal device;

a bottom electrode disposed under the control target;

a lower electrode part disposed above the control target and arranged in a first direction; and

an upper electrode part disposed above the control target and arranged in a second direction perpendicular to the first direction,

wherein the upper and lower electrode parts are configured to define a plurality device cells together at a plurality of crossover points, and

wherein the upper electrode part is configured to control, according to a biasing condition, the control target by selectively generating a field shielding effect at the plurality of crossover points.

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:

providing a control target;

disposing a bottom electrode under the control target;

providing a lower electrode above the control target;

providing an upper electrode above the control target and disposed orthogonally to the lower electrode;

maintaining the upper electrode in a floating state and applying an electrical bias to the lower electrode when an electric field is to be applied to the control target; and

applying a ground voltage to the upper electrode and applying the electrical bias to the lower electrode when the electric field is not to be applied to the control target.

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

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

11. The method of claim 9, wherein the control target is a piezo element configured to generate vibration by the field.