TW200715175A - Capacitance touchpad data input device and keyboard - Google Patents
Capacitance touchpad data input device and keyboardInfo
- Publication number
- TW200715175A TW200715175A TW094134436A TW94134436A TW200715175A TW 200715175 A TW200715175 A TW 200715175A TW 094134436 A TW094134436 A TW 094134436A TW 94134436 A TW94134436 A TW 94134436A TW 200715175 A TW200715175 A TW 200715175A
- Authority
- TW
- Taiwan
- Prior art keywords
- capacitance sensing
- sensing module
- input device
- key
- data input
- Prior art date
Links
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
A data input device (300) includes multiple keys formed by conductor plates underlying a dielectric layer. Each of the first and second keys (331, 332) has one conductor plate (12, 24) coupled to a corresponding capacitance sensing module (312, 314). The third key (333) has two conductor plates, one (32) coupled to the first capacitance sensing module (312) and the other (34) coupled to the second capacitance sensing module (314). When a user touches a key (331), the user and the conductor plate (12) forms a sensing capacitor (113) having a capacitance greater than that of a reference capacitor (123). A comparison module (130) in the corresponding capacitance sensing module (312) generates a digital bit signal indicating the key (331) being touched. A decoder (301) decodes the digital bit signals of the multiple capacitance sensing modules (331, 332, 333) to generate a digital data signal accordingly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94134436A TWI320903B (en) | 2005-10-03 | 2005-10-03 | Capacitance touchpad data input device and keyboard |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW94134436A TWI320903B (en) | 2005-10-03 | 2005-10-03 | Capacitance touchpad data input device and keyboard |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200715175A true TW200715175A (en) | 2007-04-16 |
TWI320903B TWI320903B (en) | 2010-02-21 |
Family
ID=45073784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW94134436A TWI320903B (en) | 2005-10-03 | 2005-10-03 | Capacitance touchpad data input device and keyboard |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI320903B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI381302B (en) * | 2008-11-12 | 2013-01-01 | Tpo Displays Corp | Capacitive touch panel and capacitance sensing apparatus and method for the same |
TWI414981B (en) * | 2009-10-09 | 2013-11-11 | Egalax Empia Technology Inc | Method and device for dual-differential sensing |
TWI563441B (en) * | 2015-11-11 | 2016-12-21 | Focaltech Electronics Ltd | Touch apparatus, capacitive touch detecting circuit thereof and touch detecting method using the same |
-
2005
- 2005-10-03 TW TW94134436A patent/TWI320903B/en not_active IP Right Cessation
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI381302B (en) * | 2008-11-12 | 2013-01-01 | Tpo Displays Corp | Capacitive touch panel and capacitance sensing apparatus and method for the same |
TWI414981B (en) * | 2009-10-09 | 2013-11-11 | Egalax Empia Technology Inc | Method and device for dual-differential sensing |
TWI464634B (en) * | 2009-10-09 | 2014-12-11 | Egalax Empia Technology Inc | Method and device for dual-differential sensing |
TWI563441B (en) * | 2015-11-11 | 2016-12-21 | Focaltech Electronics Ltd | Touch apparatus, capacitive touch detecting circuit thereof and touch detecting method using the same |
US9836172B2 (en) | 2015-11-11 | 2017-12-05 | Focaltech Electronics, Ltd. | Touch apparatus, capacitive touch sensing circuit thereof, and touch sensing method using the same |
Also Published As
Publication number | Publication date |
---|---|
TWI320903B (en) | 2010-02-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |