TOUCH PANEL

• US 20150060120A1
• Filed: 08/29/2014
• Published: 03/05/2015
• Est. Priority Date: 08/29/2013
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: PARK, Jang Ho
• Application Number:
  US14/473,154
• Publication Number:
  US 20150060120A1
• Time in Patent Office: Days
• US Class Current: 174/257
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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: H05K 1/0274 Optical details, e.g. printed circuits comprising integral optical means H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42
• CPC Class Codes: H05K 1/0289 having a matrix lay-out, i.e. having selectively interconnectable sets of X-conductors and Y-conductors in different planes
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
• CPC Class Codes: H05K 2201/09681 Mesh conductors, e.g. as a ground plane
• CPC Class Codes: H05K 2201/10151 Sensor

Abstract

There is provided a touch panel including a substrate; and electrode parts including a plurality of electrodes formed on the substrate, wherein the electrode parts include a plurality of conductive lines formed in a mesh pattern and have different aperture ratios for a plurality of respective regions of the substrate.

Claims

1. A touch panel, comprising:

a substrate; and

electrode parts including a plurality of electrodes disposed on the substrate,

wherein the electrode parts include a plurality of conductive lines in a mesh pattern, and have different opening ratios for a plurality of respective regions of the substrate.

2. The touch panel of claim 1, wherein the plurality of regions include an effective region and a bezel region, and

the opening ratio of the electrode part in the effective region is greater than the opening ratio of the electrode part in the bezel region.

3. The touch panel of claim 2, wherein the opening ratio of the electrode part in the bezel region is 20% to 80% of the opening ratio of the electrode part in the effective region.

4. The touch panel of claim 1, wherein the opening ratios of the electrode parts are determined by at least one of a pitch and a line width of the conductive lines.

5. The touch panel of claim 2, wherein the conductive lines of the electrode part formed in the bezel region have a line width 100% to 400% of a line width of the conductive lines of the electrode part formed in the effective region.

6. The touch panel of claim 5, wherein the line width of the conductive lines of the electrode part formed in the effective region is 0.5 μ

m to 6 μ

m.

7. The touch panel of claim 5, wherein the line width of the conductive lines of the electrode part formed in the bezel region is 0.5 μ

m to 24 μ

m.

8. The touch panel of claim 2, wherein a pitch of the conductive lines of the electrode part formed in the bezel region is 50% to 100% of a pitch of the conductive lines of the electrode part formed in the effective region.

9. The touch panel of claim 8, wherein the pitch of the conductive lines of the electrode part formed in the effective region is 20 μ

m to 500 μ

m.

10. The touch panel of claim 8, wherein the pitch of the conductive lines of the electrode part formed in the bezel region is 10 μ

m to 500 μ

m.

11. The touch panel of claim 2, wherein the bezel region has an area of 1% to 5% of an area of the effective region.

12. The touch panel of claim 2, wherein the bezel region includes at least two bezel regions and the opening ratios of the electrode parts formed in the at least two bezel regions are respectively determined depending on distances between the electrode parts and a flexible printed circuit board obtaining sensing signals.

13. The touch panel of claim 12, wherein the opening ratios of the electrode parts formed in the at least two bezel regions are determined to be lower as the distance between the electrode parts and the flexible printed circuit board is increased.

14. The touch panel of claim 12, wherein the effective region includes at least two effective regions and the opening ratios of the electrode parts formed in the at least two effective regions are respectively determined depending on distances between the electrode parts and a central point of the substrate.

15. The touch panel of claim 14, wherein the opening ratios of the electrode parts formed in the at least two effective regions are determined to be higher as the distances between the electrode parts and the central point of the substrate are decreased.

16. The touch panel of claim 14, wherein the at least two effective regions have predetermined areas depending on the distances between the at least two effective regions and the central point of the substrate.

17. The touch panel of claim 1, wherein the conductive lines are formed of one of silver (Ag), aluminium (Al), chromium (Cr), nickel (Ni), molybdenum (Mo), and copper (Cu) or an alloy containing at least two of Ag, Al, Cr, Ni, Mo, and Cu.

18. The touch panel of claim 1, wherein the substrate is formed of at least one of polyethylene terephtalate (PET), polycarbonate (PC), polyethersulfone (PES), polyimide (PI), polymethylmethacrylate (PMMA), cyclo-olefin polymers (COP), soda glass, and tempered glass.

19. The touch panel of claim 1, wherein the opening ratios satisfy the following Equation with respect to a pitch and a line width of the conductive lines.

20. The touch panel of claim 1, wherein the plurality of electrodes include:

a plurality of first electrodes extending in a first axial direction, and

a plurality of second electrodes extending in a second axial direction intersecting with the first axial direction.

21. The touch panel of claim 1, wherein the plurality of first electrodes and the plurality of second electrodes are formed on the same surface or different surfaces of the substrate.

22. A touch panel, comprising:

a substrate; and

electrode parts including a plurality of electrodes formed on the substrate,

wherein the electrode parts include conductive lines formed in a mesh pattern, and the conductive lines have an opening ratio increased from an edge of the substrate towards a center thereof.

23. The touch panel of claim 22, wherein the opening ratio of the conductive lines formed in a plurality of mesh patterns is changed within a range of 10% to 99%.

24. The touch panel of claim 22, wherein the conductive lines have a line width changed within a range of 0.5 μ

m to 24 μ

m.

25. The touch panel of claim 22, wherein the conductive lines have a pitch changed within a range of 10 μ

m to 500 μ

m.