Back to results
US 11,886,656 B2Granted
Electronic device and control method therefor
AssigneeHiDeep Inc.
InventorsHwanhee Lee, Seyeob Kim, Bonkee Kim, Hyoungwook Woo, Kiryoung Jung, Wonwoo Lee
Life of this patent
Estimating the term…
Abstract
An embodiment of the present invention provides a display device including: a touch sensor configured to sequentially transfer an electromagnetic signal having two or more frequencies to a stylus pen, and to receive an electromagnetic signal corresponding to the electromagnetic signal from the stylus pen; and a touch controller configured to operate the touch sensor by determining one of the two or more frequencies as the frequency of the electromagnetic signal depending on a change in the received electromagnetic signal.
Claims13
An electronic device comprising:
- a touch sensor configured to sequentially transfer an electromagnetic signal having two or more frequencies to a stylus pen, and to receive an electromagnetic signal corresponding to the electromagnetic signal from the stylus pen;
- and
- a touch controller configured to operate the touch sensor by determining one of the two or more frequencies as the frequency of the electromagnetic signal depending on a change in the received electromagnetic signal,
- wherein the touch sensor is further configured to sequentially apply electromagnetic signals each having a frequency included in each of a plurality of first frequency sections divided by a first frequency unit during each of a plurality of time periods within a first period, and sequentially applies electromagnetic signals each having a frequency included in each of a plurality of second frequency sections divided by a second frequency unit to each of a plurality of time periods within a second period that is successive to the first period, and
- wherein the first frequency unit is greater than the second frequency unit.
2 more elements
An electronic device comprising:
- a touch sensor configured to sequentially transfer an electromagnetic signal having two or more frequencies to a stylus pen, and to receive an electromagnetic signal corresponding to the electromagnetic signal from the stylus pen;
- a touch controller configured to operate the touch sensor by determining one of the two or more frequencies as the frequency of the electromagnetic signal depending on a change in the received electromagnetic signal;
- and
- temperature sensor configured to sense an ambient temperature,
- wherein the touch sensor starts transmitting the electromagnetic signal having the two or more frequencies when the ambient temperature is changed.
2 more elements
A control method of an electronic device, comprising:
- sequentially transmitting, by a touch sensor, an electromagnetic signal having two or more frequencies to a stylus pen;
- and
- determining, by a touch controller, one of the two or more frequencies as the frequency of the electromagnetic signal depending on a change in the received electromagnetic signal to operate the touch sensor,
- wherein the sequentially transmitting of the electromagnetic signal having the two or more frequencies to the stylus pen includes:
- sequentially applying, by the touch sensor, electromagnetic signals each having a frequency included in each of a plurality of first frequency sections divided by a first frequency unit during each of a plurality of time periods within a first period;
- and
- sequentially applying, by the touch sensor, electromagnetic signals each having a frequency included in each of a plurality of second frequency sections divided by a second frequency unit to each of a plurality of time periods within a second period that is successive to the first period, and
- wherein the first frequency unit is greater than the second frequency unit.
5 more elements
A control method of an electronic device, comprising:
- sequentially transmitting, by a touch sensor, an electromagnetic signal having two or more frequencies to a stylus pen;
- determining, by a touch controller, one of the two or more frequencies as the frequency of the electromagnetic signal depending on a change in the received electromagnetic signal to operate the touch sensor;
- and
- sensing an ambient temperature,
- wherein transmitting of the electromagnetic signal having the two or more frequencies is started when the ambient temperature is changed.
2 more elements
A system comprising:
- a stylus pen configured to include a resonance circuit having a resonance frequency;
- and
- a touch sensor configured to search for the resonance frequency by increasing a frequency of a driving signal from a lower limit to an upper limit within a predetermined range of a reference frequency or decreasing the frequency of the driving signal from the upper limit to the lower limit within the predetermined range, and to transfer an electromagnetic signal having the resonance frequency to the stylus pen,
- wherein the touch sensor is further configured to sequentially apply electromagnetic signals each having a frequency included in each of a plurality of first frequency sections divided by a first frequency unit during each of a plurality of time periods within a first period, and sequentially applies electromagnetic signals each having a frequency included in each of a plurality of second frequency sections divided by a second frequency unit to each of a plurality of time periods within a second period that is successive to the first period, and
- wherein the first frequency unit is greater than the second frequency unit.
2 more elements
Dependencies are inferred from the claim text.