Capacitive touch display device and capacitive touch panel

• US 8,390,587 B2
• Filed: 02/10/2010
• Issued: 03/05/2013
• Est. Priority Date: 11/27/2009
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Fan, Fu-Cheng, Hu, Jia-Wei
• Primary Examiner(s): Wang, Quan-Zhen
• Assistant Examiner(s): NGUYEN, JENNIFER T
• Application Number:
  US12/703,731
• Publication Number:
  US 20110128249A1
• Time in Patent Office: 1,119 Days
• Field of Search: 345/173, 345/174, 345/179, 178/18.06, 178/19.03
• US Class Current: 345/173
• 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

Abstract

A capacitive touch display device includes a stylus, a display panel, and a capacitive touch unit. The stylus touches the display panel by clicking to input a touch signal and contacts the capacitive touch unit at a contact area. The capacitive touch unit is disposed on the display panel and includes a plurality of first sensing series and a plurality of second sensing series. Each of the first sensing series includes a plurality of first sensing pads electrically connected to one another. A pitch between any two adjacent first sensing pads is P. The second sensing series intersect the first sensing series. The contact area contacted by the stylus has a contact width D, and the ratio of the contact width D to the pitch P between any two adjacent first sensing pads satisfies the following ratio condition: 1.4≦(D/P)≦1.6.

Claims

1. A capacitive touch display device, comprising:

a stylus;

a display panel;

a capacitive touch unit disposed on the display panel, wherein the stylus contacts the capacitive touch unit at a contact area to input a touch signal, the capacitive touch unit comprising;

a plurality of first sensing series, each of the plurality of first sensing series comprising a plurality of first sensing pads electrically connected to one another, wherein a pitch between any two adjacent first sensing pads of the plurality of first sensing series is P; and

a plurality of second sensing series intersecting the plurality of first sensing series, wherein the contact area contacted by the stylus has a contact width D, and a ratio of the contact width D to the pitch P between any two adjacent first sensing pads satisfies the following ratio condition;

1.4≦

(D/P)≦

1.6.

2. The capacitive touch display device as claimed in claim 1, wherein any two adjacent first sensing pads of the plurality of first sensing pads in the same first sensing series are electrically connected to each other through a first bridge line.

3. The capacitive touch display device as claimed in claim 1, wherein each of the plurality of second sensing series comprises a plurality of second sensing pads electrically connected to one another.

4. The capacitive touch display device as claimed in claim 3, wherein any two adjacent second sensing pads of the plurality of second sensing pads in the same second sensing series are electrically connected to each other through a second bridge line.

5. The capacitive touch display device as claimed in claim 1, wherein the contact area between the stylus and the capacitive touch unit is a circular contact area.

6. The capacitive touch display device as claimed in claim 5, wherein the contact width D of the contact area contacted by the stylus is substantially equal to a diameter of the circular contact area.

7. The capacitive touch display device as claimed in claim 1, wherein the contact area between the stylus and the capacitive touch unit is an N-regular polygonal contact area, and N is an even number.

8. The capacitive touch display device as claimed in claim 7, wherein the contact width D of the contact area contacted by the stylus is substantially equal to a length of the longest diagonal of the N-regular polygonal contact area.

9. The capacitive touch display device as claimed in claim 1, wherein the pitch P ranges from 4 mm to 10 mm.

10. The capacitive touch display device as claimed in claim 9, wherein an area of the contact area is A ranging from 47.2 mm² to 155 mm², and 11.8 mm≦

(A/P)≦

15.5 mm.

11. A capacitive touch panel suitable for a user to use a stylus contacting the capacitive touch panel at a contact area to input a touch signal, the capacitive touch panel comprising:

a display panel;

a plurality of first sensing series disposed on the display panel, each of the plurality of first sensing series comprising a plurality of first sensing pads electrically connected to one another, wherein a pitch between any two adjacent first sensing pads of the plurality of first sensing series is P; and

a plurality of second sensing series disposed on the display panel and intersecting the plurality of first sensing series, wherein the contact area contacted by the stylus has a contact width D, and a ratio of the contact width D to the pitch P between any two adjacent first sensing pads satisfies the following ratio condition;

1.4≦

(D/P)≦

1.6.

12. The capacitive touch panel as claimed in claim 11, wherein any two adjacent first sensing pads of the plurality of first sensing pads in the same first sensing series are electrically connected to each other through a first bridge line.

13. The capacitive touch panel as claimed in claim 11, wherein each of the plurality of second sensing series comprises a plurality of second sensing pads electrically connected to one another.

14. The capacitive touch panel as claimed in claim 13, wherein any two adjacent second sensing pads of the plurality of second sensing pads in the same second sensing series are electrically connected to each other through a second bridge line.

15. The capacitive touch panel as claimed in claim 11, wherein the contact area between the stylus and the capacitive touch panel is a circular contact area.

16. The capacitive touch panel as claimed in claim 15, wherein the contact width D of the contact area contacted by the stylus is substantially equal to a diameter of the circular contact area.

17. The capacitive touch panel as claimed in claim 11, wherein the contact area between the stylus and the capacitive touch panel is an N-regular polygonal contact area, and N is an even number.

18. The capacitive touch panel as claimed in claim 17, wherein the contact width D of the contact area contacted by the stylus is substantially equal to a length of the longest diagonal of the N-regular polygonal contact area.

19. The capacitive touch panel as claimed in claim 11, wherein the pitch P ranges from 4 mm to 10 mm.

20. The capacitive touch panel as claimed in claim 19, wherein an area of the contact area is A ranging from 47.2 mm² to 155 mm², and 11.8 mm≦

(A/P)≦

15.5 mm.