Title:
TOUCH SENSE ARRAY SYSTEM FOR SENSING VARIATION IN CAPACITANCE
Document Type and Number:
Japanese Patent JPS60158721
Kind Code:
A
Abstract:
A capacitance-variation-sensitive touch sensing array system including an array of antenna lines; and an array of touch elements, with each touch element being coupled to at least one antenna line of the antenna line array to vary the capacitance between each of the coupled antenna lines and ground upon the touch element coupled thereto being touched by an operator. An array of drive lines are capacitively coupled to the antenna lines. An array of sense lines are capacitively coupled to the antenna lines to derive sense signals from the antenna lines when drive signals are applied to the drive lines to drive the antenna lines. The amplitudes of the respective sense signals are dependent upon whether the capacitance between the respective driven antenna line and circuit ground is varied by an operator touching the touch element coupled to the driven antenna line. A microprocessor processes values derived from the sense signals to provide information associated with any particular touch element that is touched by an operator. A sequence of drive signals having different predetermined characteristics is repetitively applied to the different drive lines to cause differently characterized sense signals associated with different antenna lines to be derived on a sense line coupled to a plurality of different antenna lines. A first portion of the antenna array is supported by one side of a thin dielectric substrate and a second portion of the antenna array is supported by the opposite side of the thin dielectric substrate. The touch elements individually include a tab supported by the substrate and extending from an antenna line so that the capacitance between the antenna line and ground is varied when the tab is touched.
Inventors:
JIYON DABURIYU EBANSU
Application Number:
JP27426384A
Publication Date:
August 20, 1985
Filing Date:
December 27, 1984
Export Citation:
Assignee:
INTEGUREITETSUDO TATSUCHI AREI
International Classes:
G06F3/033; G06F3/044; G06K11/06; H03K17/96; (IPC1-7): H03K17/96
Domestic Patent References:
| JPS54160136A | 1979-12-18 | |||
| JPS551092A | 1980-01-07 | |||
| JPS5887725A | 1983-05-25 |
Attorney, Agent or Firm:
Akimoto Teruo