Operating method of capacitive touch panel and touch control barrier-type 3D display device

• US 8,872,790 B2
• Filed: 11/28/2011
• Issued: 10/28/2014
• Est. Priority Date: 05/20/2011
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Tun, Kyaw Kyaw, Wang, Chao-Chen, Li, Chun-Huai
• Primary Examiner(s): Moon, Seokyun
• Application Number:
  US13/304,839
• Publication Number:
  US 20120293452A1
• Time in Patent Office: 1,065 Days
• Field of Search: None
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H04N 13/31 using parallax barriers
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

An exemplary operating method of a capacitive touch panel adapted to a touch control barrier-type three-dimensional display device and including a sensing device is disclosed. In the operating method, a sensing voltage readout operation is performed only during a signal caused by a transient of a barrier voltage is smaller than a preset value. The voltage readout operation includes steps of: providing a first driving signal to the sensing device for performing the sensing voltage readout operation during the barrier voltage is at a logic high level; and providing a second driving signal to the sensing device for performing the sensing voltage readout operation during the barrier voltage is at a logic low level. A pulse amplitude of the first driving signal is smaller than that of the second driving signal.

Claims

1. An operating method of a capacitive touch panel adapted to a barrier-type three-dimensional display device, the capacitive touch panel comprising a sensing device, the operating method comprising:

performing a sensing voltage readout operation only during a signal caused by a transient of a barrier voltage is smaller than a preset value;

the sensing voltage readout operation comprising;

providing a first driving signal to the sensing device for performing the sensing voltage readout operation when the barrier voltage is at a logic high level; and

providing a second driving signal to the sensing device for performing the sensing voltage readout operation when the barrier voltage is at a logic low level,

wherein a pulse amplitude of the first driving signal is smaller than that of the second driving signal.

2. The operating method of a capacitive touch panel according to claim 1, wherein a time period of the first driving signal at a logic high level is shorter than that of the second driving signal at a logic high level.

3. The operating method of a capacitive touch panel according to claim 2, further comprising:

performing a raw data processing operation and a touched-point coordinate determining operation on a readout voltage in a time period excluding the time period of the sensing voltage readout operation being performed.

4. The operating method of a capacitive touch panel according to claim 1, further comprising:

performing a raw data processing operation and a touched-point coordinate determining operation on a readout sensing voltage in a time period excluding the time period of the voltage readout operation being performed.

5. The operating method of a capacitive touch panel according to claim 1, wherein the barrier voltage is an alternating current voltage signal.

6. The operating method of a capacitive touch panel according to claim 1, wherein a frequency of the barrier voltage is at least 60 Hz.

7. A touch control barrier-type three-dimensional display device, comprising:

a display panel, for displaying image data;

a barrier layer, for providing a barrier voltage;

a barrier light valve layer arranged between the display panel and the barrier layer, wherein a transmittance of the barrier light valve layer is controlled by the barrier voltage;

a touch panel, arranged on a different side of the barrier layer with respect to the barrier light valve layer, comprising;

a plurality of sensing devices;

a plurality of driving lines, wherein each of the driving lines is for receiving a driving signal to charge the sensing devices electrically coupled with the driving line;

a plurality of data readout lines, electrically coupled to the sensing devices, for transmitting sensing voltages on the respective sensing devices; and

a detecting unit, electrically coupled to the data readout lines, for reading out and processing the sensing voltages transmitted by the respective data readout lines and determining a coordinate position of a touched-point according to the result of the processing; and

a driving signal supplying unit, electrically coupled to the driving lines, for supplying the driving signal to the driving lines during a signal caused by a transient of the barrier voltage is smaller than a preset value, wherein a pulse amplitude of the driving signal supplied by the driving signal supply unit during the barrier voltage is at a logic high level is smaller than that of the driving signal supplied by the driving signal supply unit during the barrier voltage is at a logic low level.

8. The touch control barrier-type three-dimensional display device according to claim 7, wherein a time period of the driving signal at a logic high level supplied by the driving signal supplying unit during the barrier voltage is at the logic high level, is smaller than that of the driving signal at a logic high level supplied by the driving signal supplying unit during the barrier voltage is at the logic low level.

9. The touch control barrier-type three-dimensional display device according to claim 8, wherein the detecting unit is further for performing a raw data processing operation and a touched-point coordinate determining operation on the readout sensing voltages in a time period excluding the time period of reading out the sensing voltages transmitted by the respective data readout lines.

10. The touch control barrier-type three-dimensional display device according to claim 7, wherein the detecting unit is further for performing a raw data processing operation and a touched-point coordinate determining operation on the readout sensing voltages in a time period excluding the time period of reading out the sensing voltages transmitted by the respective data readout lines.

11. The touch control barrier-type three-dimensional display device according to claim 7, wherein the barrier light valve layer is a liquid crystal layer or an electrophoretic particle layer.

12. The touch control barrier-type three-dimensional display device according to claim 7, wherein the barrier voltage is an alternating current voltage signal.

13. The touch control barrier-type three-dimensional display device according to claim 7, wherein a frequency of the barrier voltage is at least 60 Hz.