Refrigerator including touch sensor
First Claim
Patent Images
1. A refrigerator comprising:
- a door including a front panel that defines at least a portion of an exterior of the refrigerator, the front panel including an operation area configured to receive a touch operation of a user;
a touch sensor assembly located in the door rearward of the operation area, the touch sensor assembly including a plurality of sensors and being configured to generate an input signal based on the touch operation; and
a sensor controller connected to the touch sensor assembly and configured to process the input signal received from the touch sensor assembly,wherein the sensor controller is configured to determine that the touch operation is a push operation based on determination that a voltage value of the processed input signal is less than or equal to a predetermined first threshold voltage value,wherein the sensor controller is configured to determine that the touch operation is a release operation based on determination that the voltage value of the processed input signal is greater than or equal to a predetermined second threshold voltage value,wherein the sensor controller comprises an amplification circuit configured to receive the input signal from the touch sensor assembly and amplify the input signal by a predetermined amplification ratio, andwherein the amplification circuit comprises;
a differential amplifier,a first resistor connected to a positive terminal of the differential amplifier,a second resistor connected to an output terminal of the differential amplifier and a negative terminal of the differential amplifier,a third resistor connected to the negative terminal of the differential amplifier and a reference power supply, anda fourth resistor having one end connected to a first point between the first resistor and the positive terminal and the other end connected to a second point between the reference power supply and the third resistor.
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Abstract
A refrigerator includes a door that has a front panel with an operation area to receive a touch operation of a user, a touch sensor assembly that is located rearward of the operation area and that includes sensors to generate an input signal based on the touch operation, and a sensor controller connected to the touch sensor assembly and configured to process the input signal received from the touch sensor assembly. The sensor controller is configured to determine whether the touch operation is a push operation or a release operation based on comparison of a voltage value of the processed input signal to predetermined first and second threshold voltage values.
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Citations
18 Claims
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1. A refrigerator comprising:
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a door including a front panel that defines at least a portion of an exterior of the refrigerator, the front panel including an operation area configured to receive a touch operation of a user; a touch sensor assembly located in the door rearward of the operation area, the touch sensor assembly including a plurality of sensors and being configured to generate an input signal based on the touch operation; and a sensor controller connected to the touch sensor assembly and configured to process the input signal received from the touch sensor assembly, wherein the sensor controller is configured to determine that the touch operation is a push operation based on determination that a voltage value of the processed input signal is less than or equal to a predetermined first threshold voltage value, wherein the sensor controller is configured to determine that the touch operation is a release operation based on determination that the voltage value of the processed input signal is greater than or equal to a predetermined second threshold voltage value, wherein the sensor controller comprises an amplification circuit configured to receive the input signal from the touch sensor assembly and amplify the input signal by a predetermined amplification ratio, and wherein the amplification circuit comprises; a differential amplifier, a first resistor connected to a positive terminal of the differential amplifier, a second resistor connected to an output terminal of the differential amplifier and a negative terminal of the differential amplifier, a third resistor connected to the negative terminal of the differential amplifier and a reference power supply, and a fourth resistor having one end connected to a first point between the first resistor and the positive terminal and the other end connected to a second point between the reference power supply and the third resistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification