Touch circuit and touch sensing device
AssigneeHoseo University Academic Cooperation Foundation
InventorsByung Seong BAE, Seo Jin KANG, Hyuck Su LEE, Jang Hoo LEE
Life of this patent
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Abstract
The present invention relates to a touch circuit for stably maintaining an output voltage level by using a transistor, comprising: a first drive transistor (T1) having a drain electrode and a gate electrode connected to input power source (VDD), and having a source electrode connected to the drain electrode of a second drive transistor (T2); and the second drive transistor (T2) having the gate electrode connected to one electrode of a capacitor of which the other electrode is connected to the input power source (VDD), having the drain electrode connected to the source electrode of the first drive transistor (T1), and having the source electrode connected to the ground.
Claims9
A touch circuit for stably maintaining an output voltage level using transistors, the touch circuit comprising:
- a first driving transistor (T1) having a drain electrode and a gate electrode connected to an input power supply (VDD), and having a source electrode connected to a drain electrode of a second driving transistor (T2);
- and
- the second driving transistor (T2) having a gate electrode connected to one electrode of a capacitor, and having the drain electrode connected to the source electrode of the first driving transistor (T1), and having a source electrode connected to ground, the capacitor having another electrode connected to the input power supply (VDD).
A touch circuit for stably maintaining an output voltage level using transistors, the touch circuit comprising:
- a first driving transistor (T1) having a drain electrode and a gate electrode connected to a source electrode of a third driving transistor (T3), and having a source electrode connected to a drain electrode of a second driving transistor (T2);
- the second driving transistor (T2) having a gate electrode connected to one electrode of a capacitor, and having the drain electrode connected to the source electrode of the first driving transistor (T1), and having a source electrode connected to ground, the capacitor having another electrode connected to an input power supply (VDD);
- the third driving transistor (T3) having a drain electrode and a gate electrode connected to the input power supply (VDD), and having the source electrode connected to the drain electrode of the first driving transistor (T1);
- and connected to a drain electrode of a fourth driving transistor (T4).
- the fourth driving transistor (T4) having a gate electrode connected to the gate electrode of the second driving transistor (T2), and having a drain electrode connected to the drain electrode of the first driving transistor (T1), and having a source electrode connected to the ground.
A touch sensing device for stably maintaining an output voltage level using transistors, the touch sensing device comprising:
- a first driving transistor (T1) having a drain electrode and a gate electrode connected to an input power supply (VDD), and having a source electrode connected to a drain electrode of a second driving transistor (T2);
- the second driving transistor (T2) having a gate electrode connected to one electrode of a capacitor, and having the drain electrode connected to the source electrode of the first driving transistor (T1), and having a source electrode connected to ground, the capacitor having another electrode connected to the input power supply (VDD);
- a touch electrode connected to the gate electrode of the second driving transistor (T2);
- and
- an output stage connected to the drain electrode of the second driving transistor (T2),
- wherein when the touch electrode is not touched, a voltage of the output stage becomes a voltage close to the ground, or when the touch electrode is touched, the voltage of the output stage becomes a voltage close to the input power supply (VDD).
Dependencies are inferred from the claim text.