Patent
Touch panel
| العنوان: | Touch panel |
|---|---|
| Patent Number: | 8,669,954 |
| تاريخ النشر: | March 11, 2014 |
| Appl. No: | 13/171668 |
| Application Filed: | June 29, 2011 |
| مستخلص: | A touch panel includes a substrate, scan lines, data output lines, a signal processing unit and touch sensing units. Each touch sensing unit includes a sensing electrode, a reference capacitor, an output circuit and a reset circuit. The sensing electrode is disposed in a breach of the sensing electrode. The reference capacitor, the output circuit and the reset circuit are disposed on the substrate and in the breach. The output circuit, the reset circuit, the reference capacitor and the sensing electrode are electrically coupled to a reference point. The output circuit is configured to output touch signals to the corresponding data output line. The signal processing unit is configured to obtain electric potential of the data output line and perform a corresponding processing step. When the touch sensing unit is out of working, the reference point is reset to a predetermined electric potential. |
| Inventors: | Chou, Hung-Wen (Hsin-Chu, TW); Chiang, Min-Feng (Hsin-Chu, TW); Yu, Jian-Shen (Hsin-Chu, TW); Liu, Po-Yuan (Hsin-Chu, TW) |
| Assignees: | Au Optronics Corp. (Hsinchu, TW) |
| Claim: | 1. A touch panel comprising: a substrate; a plurality of scan lines disposed on the substrate; a plurality of data output lines disposed on the substrate, the scan lines and the data output lines dividing the substrate into a plurality of sensing regions; a signal processing unit electrically coupled to the data output lines so as to obtain electric potential of the data output lines and perform a corresponding processing step, and the signal processing unit outputting processed result; and a plurality of touch sensing units, each touch sensing unit being disposed in a corresponding sensing region of the sensing regions, each touch sensing unit being electrically coupled to a corresponding scan line of the scan lines and a corresponding data output line of the data output lines, each touch sensing unit being controlled whether to perform a touch sensing action by the corresponding scan line, and at least one of the touch sensing units comprising: a sensing electrode disposed on the substrate, and the sensing electrode having a breach; a reference capacitor disposed on the substrate and in the breach; a first conducting line connected between a terminal of the reference capacitor and the sensing electrode, and a point on the first conducting line being selected as a reference point; a second conducting line connected between another terminal of the reference capacitor and the corresponding scan line; an output circuit disposed on the substrate and in the breach, and the output circuit being electrically coupled to the reference point and being configured to output touch signals to the corresponding data output line; and a reset circuit disposed on the substrate and in the breach, the reset circuit being electrically coupled to the reference point so as to reset the reference point to a predetermined electric potential when the touch sensing unit is out of working; wherein when the touch sensing unit is controlled to perform the touch sensing action by the corresponding scan line, the output circuit determines whether to transmit the electric potential of the corresponding scan line to the corresponding data output line according to electric potential of the reference point; wherein the output circuit comprises: a first transistor having a gate, a first drain/source and a second drain/source, the gate of the first transistor being electrically coupled to the reference point, and the first drain/source of the first transistor being electrically coupled to the corresponding scan line; and a second transistor having a gate, a first drain/source and a second drain/source, the gate of the second transistor being electrically coupled to the corresponding scan line, the first drain/source of the second transistor being electrically coupled to the corresponding data output line, and the second drain/source of the second transistor being electrically coupled to the second drain/source of the first transistor. |
| Claim: | 2. The touch panel according to claim 1 , wherein the reset circuit comprising: a unilateral conducting component having a first terminal and a second terminal, the unilateral conducting component allowing electric current to flow from the first terminal to the second terminal, the first terminal of the unilateral conducting component being electrically coupled to the reference point, and the second terminal being electrically coupled to the corresponding scan line. |
| Claim: | 3. The touch panel according to claim 2 , wherein the unilateral conducting component is implemented by a diode-connected transistor. |
| Claim: | 4. The touch panel according to claim 1 , wherein material of the first conducting line is different from material of the sensing electrode. |
| Claim: | 5. The touch panel according to claim 4 , further comprising an insulation layer disposed between the first conducting line and the sensing electrode, wherein the insulation layer has a via hole, and the first conducting line is electrically connected to the sensing electrode through the via hole. |
| Claim: | 6. The touch panel according to claim 1 , further comprising an insulation layer disposed between the first conducting line and the sensing electrode, wherein the insulation layer has a via hole, and the first conducting line is electrically connected to the sensing electrode through the via hole. |
| Current U.S. Class: | 345/173 |
| Patent References Cited: | 5381551 January 1995 Maeda et al. 8054261 November 2011 Pak et al. 2009/0295747 December 2009 Hsieh et al. 2010/0110028 May 2010 Takahashi et al. 2010/0302182 December 2010 Wei et al. 2011/0141042 June 2011 Kim et al. 2012/0050220 March 2012 Liu et al. 101598862 December 2009 101840094 September 2010 101930320 December 2010 101930320 December 2010 200949654 December 2009 |
| Other References: | China Office Action issued Jul. 4, 2012. cited by applicant Taiwan Patent Office, “Office Action”, Sep. 17, 2013. cited by applicant |
| Assistant Examiner: | Shapiro, Leonid |
| Primary Examiner: | Boddie, William |
| Attorney, Agent or Firm: | WAPT, PC King, Justin |
| رقم الانضمام: | edspgr.08669954 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |