The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2017
Filed:
Aug. 24, 2015
Texas Instruments Incorporated, Dallas, TX (US);
Wendy X. Fang, Murphy, TX (US);
Ing-Yih James Wang, Tucson, AZ (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
A 5-wire touch screen system includes a touch screen () including a wiper () and a resistive layer () aligned with the wiper and first (UL), second (UR), third (LR), and fourth (LL) resistive layer contacts, wherein a touch on the screen presses a small portion of the wiper against the resistive layer, producing a touch resistance (R) between them at a touch point on the resistive layer. The wiper and various contacts are selectively coupled to first (V) and second (GND) reference voltages, respectively, to generate an analog touch voltage (V) at the touch point. The wiper and various contacts are selectively coupled to an analog input () and a reference voltage input of an ADC () for converting the touch voltage (V) to a digital representation. Analog voltages (V) and (V) at the touch point are converted to corresponding digital representations by the ADC.