Adaptive non-contact testing method for touch panel

• US 20090160788A1
• Filed: 12/20/2007
• Published: 06/25/2009
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Chien, Shun-Ta
• Granted Patent: US 8,009,148 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers

Abstract

An adaptive non-contact testing method is provided for testing a touch panel, wherein an air nozzle generates an air jet toward a selected position on a touch panel under testing to cause the touch panel to generate a touch signal. A testing system receives the touch signal generated by the touch panel and compares the received touch signal with a preset touch-signal reference level. When the received touch signal is smaller than the preset touch-signal reference level, the height distance between the air nozzle and the touch panel is reduced or the pressure of the air jet from the air nozzle is varied to realize adaptive testing of the touch panel.

Claims

1. An adaptive non-contact testing method for testing a touch panel, comprising the following steps:

(a) arranging an air nozzle having an air jet orifice above a surface of the touch panel with a predetermined height distance set between the air jet orifice and the surface of the touch panel;

(b) supplying an air to the air nozzle to cause the air jet orifice of the air nozzle to generate an air jet toward a selected position on the surface of the touch panel to thereby cause the touch panel to generate a touch signal;

(c) receiving the touch signal from the touch panel;

(d) comparing the received touch signal with a preset touch-signal reference level; and

(e) reducing the height distance between the air jet orifice of the air nozzle and the surface of the touch panel when the received touch signal is smaller than the preset touch-signal reference level, and repeating steps (c) to (e) until the touch signal received from the touch panel exceeds the preset touch-signal reference level.

2. The adaptive non-contact testing method as claimed in claim 1, wherein after step (e), the method further comprises a step of determining if the touch signal received from the touch panel is stable.

3. The adaptive non-contact testing method as claimed in claim 1, wherein after step (e), the method further comprises the following steps:

(f) driving the air nozzle to move along a predetermined movement route on the surface of the touch panel; and

(g) receiving each touch signal generated by the touch panel during the movement of the air nozzle along the movement route.

4. The adaptive non-contact testing method as claimed in claim 3, wherein after step (g), the method further comprises a step of displaying the touch signal corresponding to the movement route of the air nozzle on a display device.

5. An adaptive non-contact testing method for testing a touch panel, comprising the following steps:

(a) arranging an air nozzle having an air jet orifice above a surface of the touch panel with the air jet orifice set at a fixed height with respect to the surface of the touch panel;

(b) supplying an air to the air nozzle to cause the air jet orifice of the air nozzle to generate an air jet of a predetermined pressure toward a selected position on the surface of the touch panel to thereby cause the touch panel to generate a touch signal;

(c) receiving the touch signal from the touch panel;

(d) comparing the received touch signal with a preset touch-signal reference level; and

(e) varying the pressure of air jet generated by the air jet orifice of the air nozzle when the received touch signal is smaller than the preset touch-signal reference level, and repeating steps (c) to (e) until the touch signal received from the touch panel exceeds the preset touch-signal reference level.

6. The adaptive non-contact testing method as claimed in claim 5, wherein after step (e), the method further comprises a step of determining if the touch signal received from the touch panel is stable.

7. The adaptive non-contact testing method as claimed in claim 5, wherein after step (e), the method further comprises the following steps:

(f) driving the air nozzle to move along a predetermined movement route on the surface of the touch panel; and

(g) receiving each touch signal generated by the touch panel during the movement of the air nozzle along the movement route.

8. The adaptive non-contact testing method as claimed in claim 7, wherein after step (g), the method further comprises a step of displaying the touch signal corresponding to the movement route of the air nozzle on a display device.