TOUCH DISPLAY DEVICE with multiple alternating touch periods and display periods per frame

• US 20160034060A1
• Filed: 07/31/2014
• Published: 02/04/2016
• Est. Priority Date: 07/31/2014
• Status: Abandoned Application

• Current Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Original Assignee: Himax Technologies Ltd. (Himax Technologies Incorporated)
• Inventors: CHANG, Yaw-Guang, LIN, Yu-Feng
• Application Number:
  US14/449,136
• Publication Number:
  US 20160034060A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G09G 5/12 Synchronisation between the display unit and other units, e.g. other display units, video-disc players

Abstract

The touch display device includes a display panel and a panel driver. The display panel displays a video and to receive a touch operation. The panel driver includes a timing controller and a memory module. The timing controller generates a clock signal, each cycle of the clock signal including N display periods and N touch periods, the total time of the N display periods corresponding to a frame of a video signal, and the total time of the N display periods and the N touch periods corresponding to one cycle of the video signal, in which N is a positive integer. The panel driver alternately drives the panel to display the video during each of the N display periods and to detect the touch operation during each of the N touch periods. The memory module sequentially stores the image data of the video signal according to the clock signal.

Claims

1. A touch display device, comprising:

a display panel configured to display a video and to receive a touch operation; and

a panel driver, comprising;

a timing controller configured to generate a clock signal, each cycle of the clock signal comprising N display periods and N touch periods, the total time of the N display periods corresponding to a frame of a video signal, and the total time of the N display periods and the N touch periods corresponding to one cycle of the video signal, wherein N is a positive integer equal or greater than two, and the frame consisting of N line data,

wherein the panel driver is configured to alternately drive the panel to display the video during each of the N display periods and to detect the touch operation during each of the N touch periods; and

a memory module comprising a first line memory and a second line memory, wherein the first line memory receives only a first line data of the N line data corresponding to one of the N display periods during a first time;

during a second time after the first time, the first line memory receives only a second line data of the N line data corresponding to another one of the N display periods and transmits the first line data to the second line memory, and the second line memory keeps the first line data and outputs the first line data to the display panel.

2. The touch display device of claim 1, wherein the total time of the N touch periods is equal to a sum of a front porch period, a back porch period, and an active period of a vertical synchronization signal.

3. The touch display device of claim 1, wherein two of the N display periods are separated by one of the N touch periods, and two of the N touch periods are separated by one of the N display periods.

4. The touch display device of claim 1, wherein each of the N display periods is followed by one of the N touch periods.

5. The touch display device of claim 1, wherein the order of the N touch periods and the N display periods are varied with the frames of the video signal.

6. The touch display device of claim 1, wherein each of the N touch periods is followed by one of the N display periods when the display panel displays odd frames of the video signal.

7. The touch display device of claim 6, wherein each of the N display periods is followed by one of the N touch periods when the display panel displays even frames of the video signal.

8. The touch display device of claim 1, wherein the display panel comprises a plurality of gate lines having odd-numbered gate lines and even-numbered gate lines, wherein when N=2, the panel driver is further configured to drive the odd-numbered gate lines during a first display period of the N display period, and to drive the even-numbered gate lines during a second display period of the N display periods, and each one of the first display period and the second display period is followed by one of a first touch period and a second touch period of the N touch periods.

9-10. -10. (canceled)

11. A control method for a touch display device, comprising:

generating a clock signal by a timing controller, wherein each cycle of the clock signal comprising N display periods and N touch periods, the total time of the N display periods corresponding to a frame of a video signal, and the total time of the N display periods and the N touch periods corresponding to the one cycle of the video signal, wherein N is a positive integer equal or greater than two, and the frame consisting of N line data;

alternately driving the touch display device to display a video during each of the N display periods, and to detect a touch operation during each of the N touch periods;

receiving only a first line data of the N line data corresponding to one of the N display periods during a first time; and

receiving only a second line data of the N line data corresponding to another one of the N display periods, and transmitting the first line data to the display panel during a second time following the first time.

12. The control method of claim 11, wherein the total time of the N touch period periods is equal to a sum of a front porch period, a back porch period, and a active period of a vertical synchronization signal.

13. The control method of claim 11, wherein two of the N display periods are separated by one of the N touch periods, and two of the N touch periods are separated by one of the N display periods.

14. The control method of claim 11, wherein each of the N display periods is followed by one of the N touch periods.

15. The control method of claim 11, wherein the order of the N touch periods and the N display periods are varied with the frames of the video signal.

16. The control method of claim 11, wherein each of the N touch periods is followed by one of the N display periods when the touch display device is configured to display odd frames of the video signal.

17. The control method of claim 16, wherein each of the N display periods is followed by one of the N touch periods when the touch display device is configured to display even frames of the video signal.

18. The control method of claim 11, wherein when N=2, the step of alternately driving the touch display device comprises:

driving the odd-numbered gate lines of the touch display device during a first display period of the N display periods; and

driving the even-numbered gate lines of the touch display device during a second display period of the N display periods, wherein each one of the first display period and the second display period is followed by one of the first touch period and the second touch period.

19-20. -20. (canceled)

21. A touch display device, comprising:

a display panel configured to display a video and to receive a touch operation; and

a panel driver, comprising;

a timing controller configured to generate a clock signal, each cycle of the clock signal comprising N display periods and N touch periods, the total time of the N display periods corresponding to a frame of a video signal, and the total time of the N display periods and the N touch periods corresponding to one cycle of the video signal, wherein N is a positive integer equal or greater than two, and the frame consisting of N line data,

wherein the panel driver is configured to alternately drive the panel to display the video during each of the N display periods and to detect the touch operation during each of the N touch periods; and

a dual port memory receiving only a first line data of the N line data corresponding to one of the N display periods during a first time,

wherein during a second time following the first time, the dual port memory receives only a second line data of the N line data corresponding to another one of the N display periods and transmits the first line data to the display panel.