Samsung Electronics Co., Ltd.

Interport International, Inc.

Young Kyoo Kim

Sun Kee Lee

Soon-Chul Jeong

Hong-Kee Kim

Ik-Soo Chang

Chul-Dong Kim

Hongseok Lee

Seong-Hoon Lee

Jong-Tae Park

Young-Kon Lee

Seung-Won Chung

Jin Woo Kim

Han Bit Kim

Jun Jin Kong

Hoon Song

Jungkwuen An

Chilsung Choi

Kanghee Won

Chang Soo Park

Doo Suk Kang

Jong-Young Hong

Bo Kun Choi

Geon Soo Kim

Seung Nyun Kim

Cheong Jae Lee

Sung Jo Oh

Gyu Cheol Choi

Seong Jae Lee

Han Jib Kim

Hyeon Woo Lee

Seung Young Jeon

Yong-chae Jeong

Je Won Lee

Pil Joong Lee

Jai Young Choi

A display apparatus capable of providing an expanded viewing window includes a light guide plate including an input coupler and an output coupler; and an image providing apparatus facing the input coupler to provide an image to the input coupler. The input coupler may include a plurality of sub input couplers configured to propagate the image provided from the image providing apparatus at different angles in the light guide plate.

Display apparatus for providing expanded viewing window

A holographic display device includes a light source configured to emit light, the light including first light of a first wavelength, second light of a second wavelength, and third light of a third wavelength; a spatial light modulator configured to form a holographic pattern to modulate the light emitted from the light source and to produce a holographic image; and a focusing optical system configured to focus the holographic image. The focusing optical system includes a fixed-focus optical system having a fixed focal length, and a variable focus optical system having a focal length that is changed by electrical control. The fixed-focus optical system is configured to focus the first light of the first wavelength, the second light of the second wavelength, and the third light of the third wavelength on different positions, respectively, on an optical axis to cancel a chromatic aberration by the variable focus optical system.

Holographic display device having reduced chromatic aberration

An electronic device according to various embodiments of the present disclosure includes: a housing; a user interface exposed through a portion of the housing; at least one communication circuit configured to discover and connect to another electronic device wirelessly without an access point or a base station; at least one processor operatively connected with the user interface and the communication circuit; and a memory operatively connected with the processor, wherein, when being executed, the memory stores instructions that cause the processor to transmit a plurality of first beacon signals for wireless connection by using the communication circuit during first time periods, to detect at least one second beacon signal for wireless connection, transmitted from an external device, by using the communication circuit, during one period of second time periods which are different from the first time periods, to receive multimedia data from an external server after detecting the at least one second beacon signal, and to output at least one of an audio, an image, or a video based at least in part on the multimedia data. Other embodiments are possible.

Method for providing content and electronic device for supporting same

A method for managing operating system executed by an electronic device is provided. The method includes obtaining, by a guest module of the guest operating system, information regarding a guest app executable on the guest operating system, providing, by the guest module, the information regarding the guest app to a host module of the host operating system, providing, by the host module, the information regarding the guest app to an app list creation module of the host operating system, combining, by the app list creation module, information regarding a host app executable on the host operating system and the information regarding the guest app, and outputting, by the app list creation module, an app execution list that includes the combined information.

Method for managing operating system and electronic device supporting the same

An electronic device and method for operation of same are provided. The electronic device includes a display, a memory, and a processor configured to execute a first operating system, a second operating system and an application run on the second operating system. The processor displays an execution screen of the application on the display, compares, in response to an event that occurs on the first operating system, a priority of an event with a priority of the application, and maintains the execution screen of the application running on the second operating system if the priority of the application is higher than the priority of the event.

Method and apparatus for controlling a plurality of operating systems

An electronic device includes a memory, a communication circuit, and a processor configured to operatively connect with the memory and the communication circuit. The processor is configured to send identification information of a base station attached to the electronic device via the communication circuit to a server, receive first base station information about base stations included in a first area on the base station from the server, store the first base station information in the memory, and estimate a location of the electronic device based on properties of a signal received from at least one of the base stations included in the first area or the first base station information.

Location estimation method and electronic device for performing the same

There is provided a channel encoder having convolutional encoders concatenated in parallel or in series. The channel encoder includes a first encoder for encoding input information bits, an interleaver having a memory and an index generator, for modifying the order of the information bits in a predetermined method, a second encoder for encoding the output of the interleaver, first and second terminating devices for terminating frames of input and output information bits of the first and second encoders, a tail bit generator for storing tails bits used in frame termination, and a controller and a switch for controlling the above procedure.

Adaptive channel encoding method and device

A device and a method for combining outputs of a plurality of linear power amplifiers while preventing loss of signals. The combined linear power amplifying device, including: a power divider module which has paths connected respectively between one input terminal and a plurality of output terminals and switches connected respectively to each of the output terminals, for dividing power of a RF signal input to the power divider module and respectively outputting the divided power to the output terminals; a power combiner module which has paths connected respectively between a plurality of input terminals and one output terminal and the switches connected respectively to each of the input terminals, for combining power of a RF signal input to the power combiner module and outputting the combined power; and linear power amplifiers which are connected between the output terminals of the power divider module and the input terminals of the power combiner module, for linearly amplifying the RF signal power-divided in the power divider module thereby outputting the linearly amplified signal to the power combiner module, and upon generation of a failed state of the linear power amplifiers, the failed amplifier opening the path of the affected RF signal by turning off the corresponding switches in said power divider module and said power combiner module.

Combined linear power amplifying device and method

A feedforward-type linear power amplifier directly compares amplitude and phase of a signal applied to one input end of a first signal canceler with amplitude and phase of a signal applied to another input end of the first signal canceler, and according to the comparison results, controls a first variable attenuator and a first variable phase shifter disposed in a pre-stage of the first signal canceler so that the first signal canceler extracts only the intermodulation distortion signals generated while a main power amplifier amplifies the RF input signal. Then, the linear power amplifier directly compares amplitude and phase of the intermodulation distortion signal on a main path with amplitude and phase of the intermodulation distortion signal on a sub path, and according thereto, controls a third variable attenuator and a third variable phase shifter to cancel the intermodulation distortion signals contained in the RF output signal of the main power amplifier.

Linear power amplifier and method for canceling intermodulation

A linear power amplifier and method for removing the intermodulation distortion with a predistortion system and a feed forward system. The linear power amplifier having a main power amplifier includes: a predistortion system for firstly suppressing the intermodulation signal generated upon amplification of an RF signal in the main power amplifier, by generating a harmonics corresponding to the input RF signal and a predistortion signal with coupling the RF signal to the harmonics; and a feed forward system for secondly suppressing the intermodulation signal by canceling the input RF signal and the output of the main power amplifier, extracting an intermodulation signal distortion, error-amplifying the extracted intermodulation signal distortion, and coupling the amplified intermodulation signal with the output of the main power amplifier.

Linear power amplifier and method for removing intermodulation

A radio frequency power combiner includes a plurality of transmission lines connecting a plurality of input terminals to an output terminal. An RF switch is positioned between each of the input terminals and a transmission line connecting the output terminal to the input terminal. The electrical length between each RF switch and the output terminal is preferably one half of a wavelength at a central frequency, which may be realized by two transmission lines of different impedances in each path, each a quarter wavelength long. When the switches are on, the signal power applied to all of the input terminals is combined at the output terminal. When any given switch is turned off, the RF power incident to the switch is reflected, and the transmission lines connected between that switch and the output terminal appear as an open circuit. The power combiner can also operate as a power divider. The combiner and/or divider have particular utility in RF amplifier applications, to prevent excessive loss of RF power when one or more of the amplifiers fail, by switching off the RF switch(es) connected to the failed amplifier(s).

Radio frequency power combiner

A heated massage therapy device has a hand-held housing, a mechanical vibration generator disposed within the housing, the mechanical vibration being transmitted to at least a heat-conductive, preferably infrared transparent portion thereof, and at least one source of infrared radiation disposed within the housing, the infrared radiation being applied to at least the heat-conductive portion of the housing. A number of first fresnel lenses formed in the heat conductive portion of the housing concentrate infrared radiation such that it may more efficiently be applied to the user. Second fresnel lenses may be formed about all of the individual infrared radiation sources as a group to further concentrate the infrared radiation applied to the user. Each of the infrared radiation sources may be substantially surrounded by a thermal conduction member which absorbs the infrared radiation radiated therefrom and conducts the heat generated thereby to the heat-conductive portion of said housing.

Infrared massage device

Growing community of inventors

Seoul, South Korea

Young Kyoo Kim