Capacitive touch panel

• US 8,952,924 B2
• Filed: 02/06/2012
• Issued: 02/10/2015
• Est. Priority Date: 02/23/2011
• Status: Expired due to Fees

• Current Assignee: Dongguan Masstop Liquid Crystal Display Company Limited (Wintek Corporation), Wintek Corporation
• Original Assignee: Dongguan Masstop Liquid Crystal Display Company Limited (Wintek Corporation), Wintek Corporation
• Inventors: Lee, Ming-Shian, Liu, Yu-Chen
• Primary Examiner(s): GIESY, ADAM
• Application Number:
  US13/366,365
• Publication Number:
  US 20120212448A1
• Time in Patent Office: 1,100 Days
• Field of Search: None
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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

Abstract

A capacitive touch panel including a substrate, first sensing series, second sensing series, and a first insulation layer is provided. Each first sensing series is disposed on the substrate and includes first sensing electrodes and first auxiliary electrodes. Each first auxiliary electrodes has a first connection terminal connected with one of the first sensing electrodes and a first open terminal away form the correspondingly first sensing electrode. Each second sensing series is disposed on the substrate and the first sensing series and includes second sensing electrodes. The first sensing series and the second sensing series are electrically insulated with each other. An edge of each second sensing electrode is conformed to an edge of the adjacent first sensing series.

Claims

1. A capacitive touch panel, comprising:

a substrate;

a plurality of first sensing series disposed on the substrate, each of the first sensing series extending in a first direction and comprising a plurality of first electrode units being serially connected in the first direction, each of the first electrode units comprising a first sensing electrode and a first auxiliary electrode, the first auxiliary electrode having a first connection terminal and a first open terminal opposite to the first connection terminal, the first connection terminal being connected with the first sensing electrode and the first open terminal being away from the first sensing electrode such that each of the first sensing series and each of the first electrode units are respectively asymmetrical along a central axis of the first sensing series, wherein the central axis of the first sensing series is parallel to the first direction; and

a plurality of second sensing series disposed on the first sensing series and the substrate, each of the second sensing series extending in a second direction so as to interlace with the first sensing series and comprising a plurality of second electrode units being serially connected in the second direction, each of the second electrode units comprising a second sensing electrode, and an outer contour of each of the first electrode units is different from an outer contour of each of the second electrode units, the first sensing series and the second sensing series being electrically insulated with each other, and an edge of each of the second sensing electrodes being conformed to an edge of the adjacent first sensing series.

2. The capacitive touch panel as claimed in claim 1, wherein each of the second sensing electrodes has at least one opening and each of the first auxiliary electrodes is disposed in the at least one opening of the adjacent second sensing electrode.

3. The capacitive touch panel as claimed in claim 1, wherein each of the second sensing series further comprises a plurality of third sensing electrodes serially connected in the second direction, each of the second sensing electrodes is opposite to one of the third sensing electrodes, the second sensing electrode and the third sensing electrode opposite to each other are located between two adjacent first sensing series, and an edge of each of the third sensing electrodes is conformed to the edge of the adjacent first sensing series.

4. The capacitive touch panel as claimed in claim 3, wherein at least one of the second sensing electrodes is connected with the third sensing electrode opposite thereto.

5. The capacitive touch panel as claimed in claim 3, wherein each of the first sensing electrodes is connected with two first auxiliary electrodes and the connection terminals of the two first auxiliary electrodes are connected together while the open terminals of the two first auxiliary electrodes points toward different directions.

6. The capacitive touch panel as claimed in claim 5, wherein the adjacent open terminals of the first auxiliary electrodes in a same first sensing series are connected together.

7. The capacitive touch panel as claimed in claim 1, wherein each of the first sensing electrodes is connected with two first auxiliary electrodes and the connection terminals of the two first auxiliary electrodes are respectively connected with two opposite sides of the corresponding first sensing electrode while the two first auxiliary electrodes are not mirror symmetrical to each other.

8. The capacitive touch panel as claimed in claim 1, wherein each of the first auxiliary electrodes is adjacent to the edge of one first sensing electrode in another first sensing series.

9. The capacitive touch panel as claimed in claim 1, wherein each of the second sensing series further comprises a plurality of second auxiliary electrodes, each of the second auxiliary electrodes has a second connection terminal and a second open terminal opposite to each other, the second connection terminal is connected with one of the second sensing electrodes, and the second open terminal is away from the corresponding second sensing electrode.

10. The capacitive touch panel as claimed in claim 9, wherein each of the first sensing electrodes has at least one opening and each of the second auxiliary electrodes is disposed inside the at least one opening of the adjacent first sensing electrode.

11. The capacitive touch panel as claimed in claim 1, wherein a width of a pattern of each first sensing electrode in the second direction changes in a trend of asymmetry distribution.

12. The capacitive touch panel as claimed in claim 1, wherein each of the first sensing electrodes is connected with two first auxiliary electrodes and the connection terminals of the two first auxiliary electrodes are connected together while the open terminals of the two first auxiliary electrodes points toward different directions.

13. The capacitive touch panel as claimed in claim 12, wherein the adjacent open terminals of the first auxiliary electrodes in a same first sensing series are connected together.