Abstract: A method for performing a security login in an electronic device includes accessing, by an electronic device including a communication circuit and a processor, a web page. The method also includes receiving a user input for requesting a login to the web page and receiving first information for the login from the web page. The received first information is transmitted to a payment service provider server and a request for second information for authentication is received from the payment service provider server. The requested second information is transmitted to the payment service provider server and the login to the web page is performed.

Abstract: An electronic device is provided. The electronic device includes a communication circuit configured to communicate with a user terminal and an authentication server, a memory configured to store a plurality of one time password (OTP) generation modules and a plurality of module identification information respectively corresponding to the plurality of OTP generation modules, and a processor electrically connected with the communication circuit and the memory.

Abstract: An electronic device is provided. The electronic device includes a user input circuit configured to allow a user of the electronic device to select a payment means, a communication circuit configured to receive first security information from the outside and transmit a payment request comprising the first security information and second security information to the outside, and a security information generator configured to generate the second security information.

Abstract: A server is provided to securely provide information to a purchasing user about all memberships for which points may be accumulated in an affiliated store according to affiliated store information. The server includes a communication module to provide one-time card information to a user terminal and to obtain payment completion information, including the one-time card information and affiliated store information from a payment terminal, and a control module to determine at least one membership for which points are accumulated according to the affiliated store information, and determine whether a user of the user terminal has the at least one membership according to the one-time card information. The control module allows the communication module to provide membership information according to the determined results to the user terminal including operations permitting the user to join memberships for which points may be accumulated.

Abstract: A method of displaying an image on a touch screen, the method including: displaying a first image to which time information is matched; receiving a touch input on a region displaying the first image; changing the time information matched to the first image, based on a direction of the touch input; and displaying a second image matching the changed time information.

Abstract: Provided are an ultrasound imaging apparatus including a probe and a method of controlling the ultrasound imaging apparatus. The method includes: comparing a signal value acquired through an input unit with first and second threshold values; and performing an operation that is determined based on a result of the comparison.

Abstract: An electronic device and method for payment using a membership card are provided. In a method of operating an electronic device in which a membership number is stored, the method includes displaying by a display a plurality of payment cards, detecting by a controller selection of at least one of the plurality of payment cards, and transmitting to a payment server a membership number and a card identifier identifying the selected at least one of the plurality of payment cards, wherein the payment server approves a payment to the selected at least one of the plurality of payment cards when the membership number matches a second membership identifier received from a membership card that was swiped at a payment terminal.

Abstract: A control circuit for a discontinuous conduction mode power factor correction converter using harmonic modulation includes: a first difference circuit configured to calculate and output a difference between an output voltage of a discontinuous conduction mode power factor correction converter and a reference voltage; a PI converter configured to perform a proportional integral control on an output signal of the first difference circuit, and output a signal having an arbitrary duty ratio; a second difference circuit configured to output a difference between a rectified input voltage, which is input to the discontinuous conduction mode power factor correction converter, and a harmonic modulation factor DC voltage; and a multiplication circuit configured to multiply an output of the PI controller and an output of the second difference circuit, and output a PFC control signal to a switch of the discontinuous conduction mode power factor correction converter.

Abstract: A control circuit for a discontinuous conduction mode power factor correction converter using harmonic modulation includes: a first difference circuit configured to calculate and output a difference between an output voltage of a discontinuous conduction mode power factor correction converter and a reference voltage; a PI converter configured to perform a proportional integral control on an output signal of the first difference circuit, and output a signal having an arbitrary duty ratio; a second difference circuit configured to output a difference between a rectified input voltage, which is input to the discontinuous conduction mode power factor correction converter, and a harmonic modulation factor DC voltage; and a multiplication circuit configured to multiply an output of the PI controller and an output of the second difference circuit, and output a PFC control signal to a switch of the discontinuous conduction mode power factor correction converter.

Abstract: Disclosed is a portable centrifugal car washer comprising a storeroom, disposed in a case, for storing car washing liquid, a pump for pumping out the car washing liquid in the storeroom; and a centrifugal unit for rotating the car washing liquid at a high speed, resolving into moisture particles and then spraying the moisture particles on a surface of a car. The car washer performs the washing, drying and polishing operation at the same time and thus remarkably reducing an operation time. Further, the portable centrifugal car washer of the present invention has a small size so that an operator facilely uses, and the car washing liquid can be stored in the car washer. Therefore, the car washer can be facilely carried and kept and also used anywhere at any time.