CAPACITANCE CHANGE DETECTION CIRCUIT AND DISPLAY DEVICE

Title:

CAPACITANCE CHANGE DETECTION CIRCUIT AND DISPLAY DEVICE

Document Type and Number:

WIPO Patent Application WO/2010/147063

Kind Code:

A1

Abstract:

Disclosed is a capacitance change detection circuit which makes it possible to improve the sensitivity in detecting changes in liquid crystal capacitance. A capacitance change detection circuit (10) is provided with: a first variable capacitance unit (CLC1) connected with a voltage supply line; a second variable capacitance unit (CLC2) connected in series with the first variable capacitance unit (CLC1); and a TFT (15) which is connected with the second variable capacitance unit (CLC2)and is driven in accordance with the capacitance value of the first variable capacitance unit (CLC1) and the capacitance value of the second variable capacitance unit (CLC2) so as to output electrical signals in accordance with the capacitance values thereof.

Inventors:

BROWN CHRISTOPHER
KATOH HIROMI
TANAKA KOHEI

Application Number:

PCT/JP2010/059965

Publication Date:

December 23, 2010

Filing Date:

June 11, 2010

Export Citation:

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Assignee:

SHARP KK (JP)
BROWN CHRISTOPHER
KATOH HIROMI
TANAKA KOHEI

International Classes:

G06F3/044; G02F1/13; G02F1/133; G02F1/136; G06F3/041; G09F9/00; G09F9/30

Foreign References:

JP2006040289A	2006-02-09
JP2006293482A	2006-10-26
JP2006510092A	2006-03-23