Samsung Electronics Co., Ltd.

Sogang University Research Foundation

Himchan Park

Hongseok Lee

Hoon Song

Young Shin Kim

Kanghee Won

Donghun Heo

Cheolhwan Lim

Jinwook Burm

A semiconductor device may include a voltage generator configured to generate a first base-emitter voltage of a first bipolar junction transistor, and a failure detector configured to generate a failure signal by comparing the first base-emitter voltage with an upper limit reference voltage and a lower limit reference voltage. The failure detector may include a second bipolar junction transistor a current source configured to generate a bias current, a first resistor coupled between the current source and a emitter of the second bipolar junction transistor to generate the upper limit reference voltage, a second resistor and a third resistor configured to divide a second base-emitter voltage of the second bipolar junction transistor to generate the lower limit reference voltage, and a first and second comparator configured to compare the first base-emitter voltage with the upper limit reference voltage and the lower limit reference voltage, respectively, to generate respective failure signals.

Semiconductor devices comprising failure detectors for detecting failure of bipolar junction transistors and methods for detecting failure of the bipolar junction transistors

A beam deflector, a holographic display device including the beam deflector, and a method of driving the beam deflector are provided. The beam deflector includes first electrodes spaced apart from each other on a first substrate, second electrodes spaced apart from each other on a second substrate, a liquid crystal layer between the first substrate and the second substrate, and a controller configured to cause active prisms to be formed in the liquid crystal layer and to form a floating zone by turning off a voltage of at least one of the first electrode and the second electrode disposed between adjacent ones of the active prisms.

Beam deflector, holographic display device having the same, and method of driving the beam deflector

Growing community of inventors

Seoul, South Korea

Himchan Park