Touch window and touch device

• US 10,007,389 B2
• Filed: 01/28/2015
• Issued: 06/26/2018
• Est. Priority Date: 01/28/2014
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Kim, Do Young, Jo, Ji Won
• Primary Examiner(s): Kohlman, Christopher
• Application Number:
  US14/607,797
• Publication Number:
  US 20150242029A1
• Time in Patent Office: 1,245 Days
• Field of Search: None
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 2300/04 Structural and physical details of display devices
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

A touch window according to an embodiment includes a cover substrate on which a first area and a second area are defined; a coil on the second area of the cover substrate; a first substrate on the cover substrate; and a sensing electrode on the first substrate.

Claims

1. A touch window comprising:

a cover substrate on which a first area and a second area are defined;

a coil on the second area of the cover substrate;

a first substrate on the second area of the cover substrate;

a first wire connected with the coil;

a sensing electrode on the first substrate;

a second wire connected with the sensing electrode; and

a printing layer between the cover substrate and the coil,

wherein the coil and the sensing electrode are disposed on different layers,

wherein the printing layer is in direct physical contact with the cover substrate,

wherein the coil is in direct physical contact with the printing layer,

wherein the sensing electrode is in direct physical contact with the first substrate,

wherein a touch and information input is achieved in the first area,

wherein the first area displays an image,

wherein the second area is provided at two facing ends of a peripheral portion of the first area and does not display an image,

wherein the coil is disposed on the printing layer and is located in the second area,

wherein the coil includes a first coil provided in plurality and a second coil provided in plurality and wherein the first coils and the second coils are alternatively arranged along edges of the second area,

wherein the second coils are spaced apart from the first coils,

wherein the coil does not overlap the sensing electrode,

wherein the printing layer covers the coil and a circuit board,

wherein the coil is connected to the circuit board through a wire and a pad part,

wherein the cover substrate is disposed above the printing layer, the first substrate, the sensing electrode and the coil,

wherein one surface of the printing layer directly makes contact with the second area formed on an opposite surface of the cover substrate and the coil directly makes contact with an opposite surface of the printing layer,

wherein the first and second coils have a closed loop shape,

wherein one surface of the cover substrate is configured to be touched by a digitizer pen,

wherein electromagnetic waves are generated as power is transmitted to the first and second coils, the electromagnetic waves are absorbed in the digitizer pen, and the digitizer pen emits again the electromagnetic waves at a predetermined frequency,

wherein the sensing electrode detects the position of the digitizer pen by sensing electromagnetic variation that occurs according to the approach of the digitizer pen, and

wherein the first wire and the second wire are connected with a same circuit board.

2. The touch window of claim 1, wherein the second area surrounds the first area.

3. The touch window of claim 2, wherein the sensing electrode is disposed on a region of the first substrate which overlaps with the first area.

4. The touch window of claim 1, wherein the sensing electrode senses an electromagnetic field generated by a touch object.

5. The touch window of claim 1, wherein the coil has a function of a ground electrode.

6. The touch window of claim 1, wherein the coil includes an opaque conductive metal.

7. The touch window of claim 1, wherein the first substrate has a size corresponding to the first area of the cover substrate and overlaps with the first area.

8. The touch window of claim 7, wherein the sensing electrode includes a first sensing electrode extending in a first direction and a second sensing electrode extending in a second direction.

9. The touch window of claim 8, further comprising a second substrate under the first substrate, wherein the first sensing electrode is disposed on the first substrate and the second sensing electrode is disposed on one surface of the second substrate.

10. The touch window of claim 8, wherein the first sensing electrode is disposed on the first area of the cover substrate and the second sensing electrode is disposed on the first substrate.

11. The touch window of claim 1, wherein the sensing electrode includes a first sensing electrode extending in a first direction and a second sensing electrode extending in a second direction, and the first and second sensing electrodes are disposed on the first area of the cover substrate.

12. The touch window of claim 1, further comprising at least one panel substrate under the cover substrate, wherein the sensing electrode is disposed on at least one surface of the panel substrate.

13. The touch window of claim 1, wherein the coil is disposed on an upper end and a lower end of the cover substrate.

14. A touch device comprising the touch window of claim 1.