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US 10,474,286 B2Granted
Touch display device, active pen, touch system, touch circuit, and pen recognition method
AssigneeLG Display Co., Ltd.
InventorsSangHyuck Bae, BuYeol Lee, SeungRok Shin, CheolSe Kim, DeukSu Lee, Hyunwoo Jang, Jaeseung Kim, YoungGyu Kim, Hyunsuk Cho
Life of this patent
Estimating the term…
Abstract
Embodiments described herein is able to provide a touch display device, an active pen, a touch system, a touch circuit, and a pen recognition method capable of efficiently providing a display function, a touch-sensing function, and a pen-touch-sensing function.
Claims30
A touch display device comprising:
- a display panel comprising a plurality of touch electrodes for sensing touch of the display panel;
- and
- a touch circuit configured to supply a drive signal to the display panel, the touch circuit sensing at least one of a finger touch of the display panel based on a touch signal received in response to the drive signal or pen touches of the display panel by a plurality of pens based on pen signals received from the plurality of pens in response to the drive signal,
- wherein one frame period of the touch display device includes a plurality of alternating display periods for displaying images and a plurality of blank periods, the pen signals output from the plurality of pens to the display panel in two or more blank periods from the plurality of blank periods in the one frame period of the touch display device;
- wherein the pen signals include a plurality of pen pulses, and the plurality of pen signals are in a first state or a second state, the first state comprising the pen signals in-phase with an operation signal of the touch circuit or the drive signal, and the second state comprising the pen signals in an inverse-phase with the operation signal of the touch circuit or the drive signal.
2 more elements
A touch display device comprising:
- a display panel comprising a plurality of touch electrodes for sensing touch of the display panel;
- and
- a touch circuit configured to supply a drive signal to the display panel, the touch circuit sensing at least one of a finger touch of the display panel based on a touch signal received in response to the drive signal or pen touches of the display panel by a plurality of pens based on pen signals received from the plurality of pens in response to the drive signal,
- wherein one frame period of the touch display device includes a plurality of alternating display periods for displaying images and a plurality of blank periods, the pen signals output from the plurality of pens to the display panel in two or more blank periods from the plurality of blank periods in the one frame period of the touch display device,
- wherein the pen signals include a plurality of pen pulses, and among the plurality of pen pulses, a first subset of pen pulses are in a first state, a second subset of pen pulses are in a second state, and a third subset of pen pulses are in a third state, the first state comprising the first subset of pen pulses in-phase with an operation signal of the touch circuit or the drive signal, the second state comprising the second subset of pen pulses in an inverse-phase with the operation signal of the touch circuit or the drive signal, and the third state comprising the third subset of pen pulses comprising a constant value.
2 more elements
Dependencies are inferred from the claim text.