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US 2021/0200404 A1Published application
Touch display device, touch circuit, and pen sensing method
AssigneeLG Display Co., Ltd.
InventorKiYong KIM
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure relate to a touch display device, a touch circuit, and a pen sensing method, allows various pen protocols to be adaptively set, thereby sensing various types of pens or sensing a pen by using various pen protocols.
Claims20
A touch display device, comprising:
- a touch panel including a plurality of touch electrodes;
- and
- a touch circuit configured to supply an uplink signal to one or more touch electrodes among the plurality of touch electrodes during one or more touch time periods set as an uplink communication period among N touch time periods included in each of a plurality of touch frame times, and to receive a downlink signal, which is a pen signal, during one or more touch time periods set as a downlink communication period among the N touch time periods through one or more touch electrodes among the plurality of touch electrodes,
- wherein a number or sequence of one or more touch time periods set as the downlink communication period among the N touch time periods included in a first touch frame time among the plurality of touch frame times is different from a number or sequence of one or more touch time periods set as the downlink communication period among the N touch time periods included in a second touch frame time that is different from the first touch frame time among the plurality of touch frame times.
1 more element
A touch circuit, comprising:
- a sensing circuit configured to supply an uplink signal to one or more touch electrodes among a plurality of touch electrodes during one or more touch time periods set as an uplink communication period among N touch time periods included in each of a plurality of touch frame times, and to receive a downlink signal, which is a pen signal, during one or more touch time periods set as a downlink communication period among the N touch time periods through one or more touch electrodes among the plurality of touch electrodes;
- and
- a pen protocol setting circuit configured to set a number or sequence of one or more touch time periods set as the downlink communication period among the N touch time periods included in a first touch frame time among the plurality of touch frame times, and a number or sequence of one or more touch time periods set as the downlink communication period among the N touch time periods included in a second touch frame time that is different from the first touch frame time, the number or sequence of one or more touch time periods set as the downlink communication period in the first touch frame time is different from the number or sequence of one or more touch time periods set as the downlink communication period in the second touch frame time.
A method of sensing a pen for a touch display device, the method comprising:
- outputting a first beacon signal based on a first pen protocol;
- determining whether a first pen signal output from a first pen operating with the first pen protocol is received in response to the first beacon signal;
- sensing the first pen in response to receiving the first pen signal from the first pen;
- outputting a second beacon signal based on a second pen protocol that is different from the first pen protocol;
- determining whether a second pen signal output from a second pen operating with the second pen protocol is received in response to the second beacon signal;
- and
- sensing the second pen in response to receiving the second pen signal from the second pen.
4 more elements
Dependencies are inferred from the claim text.