31results about How to "Prevent unnecessary power consumption" patented technology

A system, method and apparatus for contact-less charging of battery operated devices is presented. There is a host charger with a power converter and resonant tank circuit and a portable device where the battery is located, with a battery charging control IC. The method obviates the need for a voltage controller in each of both the host and the portable stages, thus decreasing complexity and increasing efficiency. The charging of the battery in the portable device is controlled by a charging controller therein, which is in continual electric communication with the host, whose output power the control IC dynamically monitors and controls. Two embodiments for the charging circuitry in the portable device are presented. In one embodiment component count is minimized but battery charging is not optimized when the battery voltage is very low. In the other embodiment charging efficiency is maximized regardless of the output voltage of the battery, but additional components are utilized.

A method of reducing shutter-lag in a camera image sensor may include maintaining a sensor output image to have a low resolution in a preview mode of a camera image sensor; changing a resolution of the sensor output image from a low resolution to a high resolution in response to a capture preparation signal to change an operation mode of the camera image sensor from a preview mode to a capture preparation mode, the low resolution being a resolution equal to or below a reference resolution, the high resolution being a resolution above the reference resolution; and capturing the sensor output image in response to a capture signal in the capture preparation mode of the camera image sensor.

A system, method and apparatus for contact-less charging of battery operated devices is presented. There is a host charger with a power converter and resonant tank circuit and a portable device where the battery is located, with a battery charging control IC. The method obviates the need for a voltage controller in each of both the host and the portable stages, thus decreasing complexity and increasing efficiency. The charging of the battery in the portable device is controlled by a charging controller therein, which is in continual electric communication with the host, whose output power the control IC dynamically monitors and controls. Two embodiments for the charging circuitry in the portable device are presented. In one embodiment component count is minimized but battery charging is not optimized when the battery voltage is very low. In the other embodiment charging efficiency is maximized regardless of the output voltage of the battery, but additional components are utilized.

A power management method and apparatus for a wireless LAN module in a computer system may include a communication sensitivity checking unit for checking a communication sensitivity of a wireless communications channel. If a communications sensitivity is lower than a desired value, a power mode of the wireless LAN module is changed into a sleep mode for a predetermined period of time. After the delay period expires, the wireless LAN module is switched back into a normal mode, and the communications sensitivity is checked again. If the communications sensitivity is acceptable, a data checking unit checks to determine whether there is data to be transmitted / received by the wireless LAN module. If no data needs to be sent, at least the transmission block of the wireless LAN module can be set to the power down mode. Also, if an attempt to set up a communications channel is unsuccessful, the device can be set to the power down mode for a predetermined delay period. After the delay period expires, the wireless LAN module is returned to the normal mode for another setup attempt.

An apparatus and a method for measuring a signal from a femto Base Station (BS) of a User Equipment (UE) registered to the femto BS in a mobile communication system are provided. An operating method of a femto BS for measuring the signal from the femto BS of a UE registered to the femto BS in a mobile communication system where the femto BS and a macro BS coexist, includes, when the UE registered to the femto BS is located in a service coverage area of the macro BS, generating a paging message informing of the existence of the femto BS, and sending the generated paging message to the UE. The UE measures the signal from the femto BS based on the paging message, generates a measurement report message including a measurement result, and sends the generated measurement report message to the macro BS.

An apparatus and method for unlocking a mobile device using pattern recognition are provided. The apparatus includes a touch sensor unit sensing a predetermined pattern touch-input to a liquid crystal display (LCD) unit, a pattern recognition unit recognizing information about the input pattern sensed by the touch sensor unit, a pattern comparison unit comparing information about the input pattern recognized by the pattern recognition unit with information about a predetermined pattern set by a user, and a controller controlling supply of power to the LCD unit to enable the user to use the mobile device if the input pattern and the predetermined pattern are equal to each other as compared by the pattern comparison unit.

Provided are an apparatus and a method for a low power AES cryptographic circuit for an embedded system. The apparatus and method allows each round operation to be performed in an order of an add round operation, a sub byte operation, a shift row operation, and a mix column operation in order to realize a small circuit area by making maximum reuse of designed element modules. When data is input, on the first place, operations are repeated in the above order from a first round to a round right before a last round. During a last round, only an add round key operation and a sub byte operation, and a shift row operation are performed, and then an add round key operation using a secret key is performed. At this point, each operation is performed on data by a 8-bit unit.

A portable information device having a central processing unit and a power source coupled to the central processing unit and driving the central processing unit, comprises: an external control system circuit provided between the power source and the central processing unit, and providing power supply from the power source to the central processing unit by an external input; and an autonomous control system circuit providing power supply from the power source to the central processing unit under control of the central processing unit; the external control system circuit and the autonomous control system circuit being coupled in parallel with each other, the external control system circuit including a mechanical switch turned on and off by an external input, and the autonomous control system circuit including a transistor switch turned on and off under control of the central processing unit.

Disclosed is a driving voltage controller of sense amplifiers for a memory device which prevents the sense amplifier from being over-driven when an external power voltage is used for an internal driving voltage of the sense amplifier. Reference voltage generator generates a reference voltage. Core voltage generator generates a core voltage to be used for driving voltage of sense amplifier. Comparator compares the core voltage generated by core voltage generator with the reference voltage generated by reference voltage generator. Clamp adjusts a level of the core voltage generated by the core voltage generator based on an output signal of comparator. In the case where an external power used for a driving voltage of the sense amplifier is excessively high, the comparator compares the external power voltage with the reference voltage. When the driving voltage of sense amplifier exceeds the reference voltage, the clamp drops the driving voltage of sense amplifier. Thus, the core voltage can be stably supplied.

The present invention discloses a power saving method of a portable Internet device, the portable Internet device and its instant messaging system. If a screen of the portable Internet device is in non-view state, for example, both backlight module and LCD panel are turned off, it means that a user is not viewing the screen, and thus the message update frequency of the instant messaging program is lowered to prevent unnecessary transmission and receiving of wireless signals, so as to reduce power comsumption of the portable Internet device.

A method of performing a dynamic voltage and frequency scaling operation comprises controlling a clock management unit (CMU) to predict an operating state of a central processing unit (CPU) and to provide operating frequency information to a power management integrated circuit (PMIC) based on the predicted operating state of the CPU, the operating frequency information indicating a change of an operating frequency of an application processor, and controlling the PMIC to change an operating voltage of the application processor based on the operating frequency information provided from the clock management unit.

A system for detecting an occupant in a vehicle includes a proximity sensor installed at a back of a seat and detecting an object. An automotive key locks and unlocks a door. A starter starts and stops an engine of the vehicle. A controller is configured to determine whether the occupant is in the seat based sensor values of the proximity sensor, a door unlock signal from the automotive key, and a starting signal from the starter.

An information processing apparatus operable in a first power state and in a second power state in which power consumption is lower than that in the first power state includes a near-field wireless communication unit configured to be driven by electric power induced by a radio wave from a mobile terminal, and communicate with the mobile terminal when the information processing apparatus is in the second power state. The near-field wireless communication unit sends, if a command received from the mobile terminal in the second power state is a command of a first type, a response corresponding to the command to the mobile terminal in the second power state, and if the received command is a command of a second type, performs control so as to supply electric power to a portion necessary for sending a response corresponding to the command to the mobile terminal.

An image display device capable of displaying a small-sized image and a method thereof are provided. The image display device includes a display unit, a display driving unit which controls an operation state of the display unit, a user interface unit which receives an input of a user's selection command, an image signal processing unit which receives an image signal and converting the received image signal into a designated size in accordance with the user's selection command, and a control unit which controls the display driving unit to display the converted image signal by activating a designated region on the display unit and inactivating the remaining region in accordance with the user's selection command. The image display device can be implemented by an LCD device or a PDP device. Accordingly, a small-sized image can be displayed in accordance with a user's selection, and power consumption can be reduced.

A system for detecting an occupant in a vehicle includes a proximity sensor installed at a back of a seat and detecting an object. An automotive key locks and unlocks a door. A starter starts and stops an engine of the vehicle. A controller is configured to determine whether the occupant is in the seat based sensor values of the proximity sensor, a door unlock signal from the automotive key, and a starting signal from the starter.

A method of performing a dynamic voltage and frequency scaling operation comprises controlling a clock management unit (CMU) to predict an operating state of a central processing unit (CPU) and to provide operating frequency information to a power management integrated circuit (PMIC) based on the predicted operating state of the CPU, the operating frequency information indicating a change of an operating frequency of an application processor, and controlling the PMIC to change an operating voltage of the application processor based on the operating frequency information provided from the clock management unit.

A variable frequency decoding apparatus operable in a portable audio device that can improve the power management is disclosed. The above apparatus has a decoder and a clock generator that provides the system clock for the decoder. When a bit stream representing audio compressed data is received, the decoder simultaneously provides the audio information embedded in the audio compressed data such as the bit rate and the sampling frequency of the data frame to the clock generator, and then the clock generator adjusts the clock signals; which are used by the decoder to restore to the original PCM format, to match the audio information embedded in the data frame. This audio signal compression technique can prevent possible output delay and reduce power consumption as compared with the conventional way that used a fixed sys clock.

An apparatus and method for unlocking a mobile device using pattern recognition are provided. The apparatus includes a touch sensor unit sensing a predetermined pattern touch-input to a liquid crystal display (LCD) unit, a pattern recognition unit recognizing information about the input pattern sensed by the touch sensor unit, a pattern comparison unit comparing information about the input pattern recognized by the pattern recognition unit with information about a predetermined pattern set by a user, and a controller controlling supply of power to the LCD unit to enable the user to use the mobile device if the input pattern and the predetermined pattern are equal to each other as compared by the pattern comparison unit.

An apparatus includes a packet detecting unit; a packet analyzing unit; an image processing unit processing images using image data from the packet; a power supply unit supplying power to the packet detecting, packet analyzing, and image processing units; a stand-by mode controlling unit controlling the packet detecting unit, the packet analyzing unit, and the image processing unit to be operable in a stand-by mode; a first controlling unit controlling, in a first mode, the packet detecting and packet analyzing units to be operable while the image processing unit is inoperable; a second controlling unit controlling, in a second mode, the packet detecting unit to be operable while the packet analyzing and image processing units are inoperable; and a first mode-changeover unit changing a power supply mode from the second mode to the first mode when the packet detecting unit detects a predetermined packet in the second mode.

The present invention discloses a power saving method of a portable Internet device, the portable Internet device and its instant messaging system. If a screen of the portable Internet device is in non-view state, for example, both backlight module and LCD panel are turned off, it means that a user is not viewing the screen, and thus the message update frequency of the instant messaging program is lowered to prevent unnecessary transmission and receiving of wireless signals, so as to reduce power comsumption of the portable Internet device.

The present disclosure relates to a method for performing monitoring, performed by user equipment (UE), in a wireless communication system, the method comprising: receiving information related to monitoring from a network; and performing monitoring on the basis of the information related to monitoring, wherein the information related to monitoring is information related to reduction of a range of a target which the UE will monitor.

Disclosed is a driving voltage controller of sense amplifiers for a memory device which prevents the sense amplifier from being over-driven when an external power voltage is used for an internal driving voltage of the sense amplifier. Reference voltage generator generates a reference voltage. Core voltage generator generates a core voltage to be used for driving voltage of sense amplifier. Comparator compares the core voltage generated by core voltage generator with the reference voltage generated by reference voltage generator. Clamp adjusts a level of the core voltage generated by the core voltage generator based on an output signal of comparator. In the case where an external power used for a driving voltage of the sense amplifier is excessively high, the comparator compares the external power voltage with the reference voltage. When the driving voltage of sense amplifier exceeds the reference voltage, the clamp drops the driving voltage of sense amplifier. Thus, the core voltage can be stably supplied.

A wireless ear phone and a sound broadcasting method thereof are provided. The wireless ear phone includes a first signal sensor, an electromagnetic signal transmitter, a second signal sensor and a controller. The first signal sensor generates an environment light detection result by detecting an environment light. The electromagnetic signal transmitter transmits an interruptible electromagnetic signal. The second signal sensor is disposed on a transmission path of the interruptible electromagnetic signal, and the second signal sensor generates an electromagnetic signal detection result by detecting whether the interruptible electromagnetic signal or the environment light is received. The controller enables or disables an operation of sound broadcasting of the wireless ear phone according to the electromagnetic signal detection result. When the wireless ear phone is put into an ear of a user, the transmission path is cut-off by the ear of the user.

A flip-flop includes a first node charging circuit configured to charge a first node with inverted input data generated by inverting input data, a second node charging circuit configured to charge a second node with the input data, and first through eighth NMOS transistors. The flip-flop is configured to latch the input data at rising edges of a clock signal and output latched input data as output data. The flip-flop includes an internal circuit configured to charge a sixth node with inverted input data generated by inverting the latched input data.

A flip-flop includes a first node charging circuit configured to charge a first node with inverted input data generated by inverting input data, a second node charging circuit configured to charge a second node with the input data, and first through eighth NMOS transistors. The flip-flop is configured to latch the input data at rising edges of a clock signal and output latched input data as output data. The flip-flop includes an internal circuit configured to charge a sixth node with inverted input data generated by inverting the latched input data.

A flip-flop includes a first node charging circuit configured to charge a first node with inverted input data generated by inverting input data, a second node charging circuit configured to charge a second node with the input data, and first through eighth NMOS transistors. The flip-flop is configured to latch the input data at rising edges of a clock signal and output latched input data as output data. The flip-flop includes an internal circuit configured to charge a sixth node with inverted input data generated by inverting the latched input data.

A DMB(Digital Multimedia Broadcasting) terminal and a control method thereof is provided to prevent unnecessary current consumption in a DMB receiving system. A DMB(Digital Multimedia Broadcasting) terminal comprises an inverter and an FET(Field Effect Transistor,Q). The inverter converts a mode signal offered from an MSM(Mobile Station Modem) into a DMB receipt mode signal. The FET(Field Effect Transistor,Q) activates an operation of a DMB SOC(System On Chip) only in case of going into a DMB mode according to an output signal of the inverter. The inverter inverts a mode signal offered from the MSM.

An electronic device according to various embodiments of the present invention comprises: a display; a communication module supporting short-range communication; a processor electrically connected to the display and the communication module; and a memory electrically connected to the processor, wherein the memory may store instructions that, when executed, cause the processor to: determine whether at least one predetermined article management condition has occurred; when it is determined that the article management condition has occurred, search for a signal, transmitted by at least one signal transmission apparatus, by controlling the communication module; receive the searched signal from the at least one signal transmission apparatus which transmits the signal; configure a list of articles corresponding to the article management condition on the basis of a database which includes data on articles and is stored in at least one of the memory and at least one external electronic device; and store, in the memory and the at least one external electronic device, the configured list of the articles corresponding to the article management condition. In addition, various embodiments are possible.