Sensor device and driving method thereof
AssigneeSamsung Display Co., Ltd.
InventorsHyung Gun Ma, Sang Hyun Heo, Moon Jae Jeong
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Abstract
A sensor device of the present invention includes first sensors receiving a plurality of driving signals; second sensors outputting a plurality of sensing signals in response to the driving signals; and a sensor receiver connected receiving the sensing signals from the second sensors, and including a band pass filter filtering the sensing signals. The band pass filter includes a multi-path filter in which a frequency of the driving signals is set as a center frequency; a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value; and a buffer isolating the multi-path filter and the gain amplifier from each other.
Claims20
A sensor device comprising:
- a plurality of first sensors receiving a plurality of driving signals;
- a plurality of second sensors outputting a plurality of sensing signals in response to the driving signals;
- and
- a sensor receiver receiving the sensing signals from the second sensors, and including a charge amplifier and a band pass filter filtering the sensing signals,
- wherein the band pass filter includes:
- a multi-path filter in which a frequency of the driving signals is set as a center frequency;
- a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value;
- and
- a buffer isolating the multi-path filter and the gain amplifier from each other,
- wherein the charge amplifier generates a first input signal corresponding to a difference between the sensing signals from two of the second sensors and a second input signal inverted from the first input signal, for output to the multi-path filter.
A sensor device comprising:
- a plurality of first sensors receiving a plurality of driving signals;
- a plurality of second sensors outputting a plurality of sensing signals in response to the driving signals;
- and
- a sensor receiver receiving the sensing signals from the second sensors, and including a band pass filter filtering the sensing signals,
- wherein the band pass filter includes:
- a multi-path filter in which a frequency of the driving signals is set as a center frequency;
- a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value;
- and
- a buffer isolating the multi-path filter and the gain amplifier from each other,
- wherein the multi-path filter includes a plurality of paths connected in parallel between an input terminal and an output terminal, wherein a first path among the plurality of paths sequentially includes a first input mixer, a first filter, and a first output mixer, and wherein a frequency and a phase of a first input clock signal received by the first input mixer are the same as a frequency and a phase of a first output clock signal received by the first output mixer.
A driving method of a sensor device comprising:
- supplying driving signals to a plurality of first sensors;
- receiving sensing signals from two adjacent second sensors;
- amplifying a difference between the sensing signals to generate an amplified signal and an inverted signal that is inverted with respect to the amplified signal;
- and
- filtering the amplified signal and the inverted signal through a band pass filter,
- wherein the band pass filter includes:
- a multi-path filter in which a frequency of the driving signals is set as a center frequency, the multi-path filter receiving the amplified signal and the inverted signal;
- a gain amplifier amplifying signals filtered through the multi-path filter according to a predetermined gain value;
- and
- a buffer isolating the multi-path filter and the gain amplifier from each other.
Dependencies are inferred from the claim text.