TOUCH SENSOR OF ELECTROMAGNETIC RESONANCE TYPE AND DISPLAY DEVICE INCLUDING TOUCH SENSOR

• US 20150062067A1
• Filed: 01/24/2014
• Published: 03/05/2015
• Est. Priority Date: 09/04/2013
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Hong, Won-Ki, Nam, Seung Ho, Choi, Byoung Won
• Application Number:
  US14/163,927
• Publication Number:
  US 20150062067A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/046 by electromagnetic means

Abstract

A touch sensor of an electromagnetic resonance type includes a plurality of touch electrodes configured to generate an electromagnetic wave according to an input signal or to transmit an output signal according to a response electromagnetic wave from an approached object, wherein corresponding ones of the plurality of touch electrodes are at a same layer.

Claims

1. A touch sensor of an electromagnetic resonance type comprising:

a plurality of touch electrodes configured to generate an electromagnetic wave according to an input signal or to transmit an output signal according to a response electromagnetic wave from an approached object,

wherein corresponding ones of the plurality of touch electrodes are at a same layer.

2. The touch sensor of claim 1, wherein

the plurality of touch electrodes respectively comprise a conductive layer at the same layer.

3. The touch sensor of claim 2, wherein

the plurality of touch electrodes comprises a plurality of input touch electrodes configured to generate the electromagnetic wave according to the input signal and a plurality of output touch electrodes configured to transmit the output signal according to the response electromagnetic wave.

4. The touch sensor of claim 3, wherein

the plurality of input touch electrodes are arranged in a plurality of input touch electrode columns,

the plurality of output touch electrodes are arranged in a plurality of output touch electrode columns, and

the plurality of input touch electrodes arranged in the plurality of input touch columns are arranged to alternate with the plurality of output touch electrodes arranged in the plurality of output touch electrode columns.

5. The touch sensor of claim 4, wherein

one of the input touch electrode columns or one of the output touch electrode columns comprises first electrodes and second electrodes that are alternately arranged in a column direction, and another of the input touch electrode columns or the output touch electrode columns comprises a plurality of third electrodes separated from each other.

6. The touch sensor of claim 5, wherein

a column directional length of at least one of the input touch electrode or the output touch electrode is about two times a row directional length.

7. The touch sensor of claim 5, wherein

the one of the input touch electrode columns and the one of the output touch electrode columns adjacent to each other form a sensing set column, and the sensing set column is repeated in a row direction.

8. The touch sensor of claim 5, wherein

the one of the output touch electrode columns and a pair of the input touch electrode columns adjacent thereto on opposite sides or the one of the input touch electrode columns and a pair of the output touch electrode columns adjacent thereto on opposite sides form a sensing set column, and the sensing set column is repeated in a row direction.

9. The touch sensor of claim 3, wherein

the plurality of input touch electrodes are arranged in a plurality of input touch electrode columns,

the plurality of output touch electrodes are arranged in a plurality of output touch electrode columns, and

the input touch electrode columns comprise one of the input touch electrodes and the output touch electrode columns comprise multiple ones of the output touch electrodes, or the output touch electrode columns comprise one of the output touch electrodes and the input touch electrode columns comprise multiple ones of the input touch electrodes.

10. The touch sensor of claim 9, wherein

a column directional length of the output touch electrode columns or the input touch electrode columns is equal to a row directional length thereof.

11. The touch sensor of claim 9, wherein

two adjacent ones of the input touch electrode columns and output touch electrode columns form a sensing set column, and the sensing set column is repeated in a row direction.

12. The touch sensor of claim 2, wherein

the plurality of touch electrodes are configured to generate the electromagnetic wave according to the input signal and to transmit the output signal according to the response electromagnetic wave.

13. The touch sensor of claim 12, wherein

the plurality of touch electrodes are respectively coupled to a driving circuit through a signal transmission wire.

14. The touch sensor of claim 13, wherein

a column directional length of the touch electrodes is equal to a row directional length of the touch electrodes.

15. The touch sensor of claim 1, wherein

the touch electrodes comprise a main electrode part forming an edge, and

at least one sub-electrode part extending parallel to a portion of the main electrode part and coupled to the main electrode part.

16. A display device comprising:

a substrate; and

a touch sensor of an electromagnetic resonance type at the substrate,

wherein the touch sensor comprises a plurality of touch electrodes configured to generate an electromagnetic wave according to an input signal or to transmit an output signal based on a response electromagnetic wave from an approached object, and

wherein the plurality of touch electrodes are at a same layer.

17. The display device of claim 16, further comprising

a light blocking member configured to block light, wherein the touch electrodes overlap the light blocking member.

18. The display device of claim 17, wherein

the touch electrodes comprise an opaque conductive material.

19. The display device of claim 17, wherein

the touch electrodes comprise a main electrode part forming an edge and at least one sub-electrode part extending parallel to a portion of the main electrode part and coupled to the main electrode part, and

wherein the main electrode part and the sub-electrode part respectively overlap the light blocking member.

20. The display device of claim 16, wherein

the plurality of touch electrodes respectively comprise a conductive layer at the same layer.