Touch display device and touch driving method
AssigneeLG Display Co., Ltd.
InventorsJaeHo Lee, MinHo Sohn, Jiseok Yang, Kyuhwan Lee
Life of this patent
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Abstract
A touch display device comprising a display panel including a plurality of subpixels, a driving circuit configured to drive the display panel, and a timing controller configured to control a normal mode of operation to display a first image or a touch mode of operation to display a second image in a display period and to emit a touch pattern including coordinate information in a touch period, based on a touch state of a stylus, wherein the stylus generates coordinate data by detecting the touch pattern in the touch period. A width of a scan signal supplied to the display panel is controlled based on a length of the touch period in the touch mode.
Claims17
A touch display device, comprising:
- a display panel including a plurality of subpixels;
- a driving circuit configured to drive the display panel;
- and
- a timing controller configured to control a normal mode of operation to display a first image or a touch mode of operation to display a second image in a display period and to display a touch pattern including coordinate information, based on a touch state of a stylus,
- wherein a frame period includes the display period and a touch period in the touch mode,
- wherein the touch mode is configured to display the touch pattern to be recognized by the stylus in the touch period, and
- wherein a width of a scan signal supplied to the display panel is controlled based on a length of the touch period in the touch mode.
A touch driving method, comprising:
- determining whether there is a touch by a stylus;
- operating in normal mode for displaying a first image when there is no touch by the stylus;
- operating in touch mode for displaying a second image and a touch pattern including coordinate information when there is a touch by the stylus;
- determining coordinates of the stylus in the touch mode;
- and
- tracking touch positions of the stylus,
- wherein a frame period includes a display period and a touch period in the touch mode,
- wherein the touch mode is configured to display the touch pattern to be recognized by the stylus in the touch period,
- wherein a width of a scan signal supplied to a display panel is controlled based on a length of the touch period in the touch mode.
A touch sensing system, comprising:
- a display panel including a plurality of subpixels;
- a stylus that senses contact or proximity with the display panel;
- a driving circuit configured to drive the display panel;
- and
- a timing controller configured to control a normal mode that displays a first image, or a touch mode that displays a second image and a touch pattern including coordinate information depending on a touch state of the stylus;
- wherein the touch pattern includes:
- cell areas where subpixels for displaying an encryption pattern are located;
- and
- guide lines where subpixels for dividing the cell areas are located,
- wherein a frame period includes a display period and a touch period in the touch mode,
- wherein the touch mode is configured to display the touch pattern to be recognized by the stylus in the touch period,
- wherein a width of a scan signal supplied to the display panel is controlled based on a length of the touch period in the touch mode.
Dependencies are inferred from the claim text.