Lg Electronics Inc.

Seoul National University

Hyunjong Kim

Jongchul Ha

Jiwon Chang

Suhwan Kim

Kidong Kim

Yeol Ho Lee

Dongsoo Moon

Minsu Park

Cyuyeol Rhee

Yungkoo Lee

Geunho Jin

Dongwon Sung

Kyungmok Yeo

A semiconductor device includes a signal conversion circuit configured to convert a sensing current provided from a sensing element into a sensing voltage; an analog-to-digital converter (ADC) configured to convert the sensing voltage to a digital value; and a driving circuit configured to drive a light emitting element, wherein the ADC generates a digital value corresponding to proximity to an object by performing a primary operation comparing a ramp signal varying with time and the sensing voltage while the light emitting element is not driven and a secondary operation comparing the ramp signal and the sensing voltage while the light emitting element is driven.

Semiconductor device performing proximity sensing

A dehumidifier includes a body having an inlet for suctioning air and an outlet for discharging air; a compressor, disposed at the body, for compressing a refrigerant; a condenser for condensing the refrigerant compressed from the compressor; an expander for expanding the refrigerant condensed from the condenser; an evaporator, disposed at upstream of the condenser according to the flow direction of air, for evaporating the refrigerant expanded from the expander; a condensate water tank to store condensate water condensed from the evaporator; and a condensate water pipe, connected to the condensate water tank, for flowing the condensate water to be heat-exchanged with the refrigerant compressed from the compressor.

Dehumidifier

A heat pump includes a first cycle device and a second cycle device. The first cycle device is connected such that, in a heating operation, a first refrigerant is circulated in an order of a first compressor, a 4-way valve, a first heat exchanger, a second heat exchanger, a first expansion mechanism, a third heat exchanger, the 4-way valve, and the first compressor, and such that, in a cooling operation, the first refrigerant is circulated in an order of the first compressor, the 4-way valve, the third heat exchanger, the first expansion mechanism, the second heat exchanger, the first heat exchanger, the 4-way valve, and the first compressor. The second cycle device is connected such that a second refrigerant is circulated in an order of a second compressor, a fourth heat exchanger, a second expansion mechanism, the second heat exchanger, and the second compressor.

Heat pump

Growing community of inventors

Seoul, South Korea

Hyunjong Kim