Abstract: A compact sized integrated quadband antenna for portable devices used in wireless applications is provided to provide wireless wide area network quadband coverage for world wide applications. The antenna design includes a combination of F-shaped and variations of L-shaped metal pieces. The F-shaped and variations of L-shaped metal pieces are provided on a double-sided printed circuit board. The F-shaped metal piece covers 800 MHz and 900 MHz bands. Two variations of L-shaped metal pieces are provided, whereby the two variations produce two resonants in the 1800 MHz and 1900 MHz bands. The two variations of L-shaped metal pieces are provided inside the F-shaped metal piece. The laptop display frame or the metal display supporters are used as part of the antenna, the display frame or the metal display supporters providing the ground plane to the antenna design.

Abstract: A compact sized embedded, multiband, multi-standard, interoperable antenna for portable devices used in wireless applications is provided. The antenna design includes an asymmetrical structure provided on a double-sided printed circuit board. The asymmetrical structure covers both the ultra-wideband and the wireless local area network band. The asymmetrical structure provided on the front side of the printed circuit board is a primary radiator with a supplement strip radiator, whereby the bottom of the primary radiator is close to the vertical ground plane and fed by a probe extended from a coaxial line. The asymmetrical structure on the front side provides a well-matched bandwidth covering the ultra-wideband band of 3.1 GHz to 10.6 GHz. A second supplement strip is provided on the backside of the printed circuit board which provides the second resonance at the 2.4 GHz wireless local area network band.

Abstract: A miniature antenna includes a radiating arm that defines a grid dimension curve. In one embodiment, the radiating arm includes a planar portion and at least one extruded portion. The planar portion of the radiating arm defines the grid dimension curve. The extruded portion of the radiating arm extends from the planar portion of the radiating arm to define a three-dimensional structure. In one embodiment, the miniature antenna includes a first radiating arm that defines a first grid dimension curve within a first plane and a second radiating arm that defines a second grid dimension curve within a second plane. In one embodiment, the miniature antenna includes a radiating arm that forms a non-planar structure.

Abstract: A dual band antenna device operable in a first frequency band and a second frequency band is disclosed. The device comprises a first radiation body and a second radiation body. The first radiation body forms a single path with at least two bend portions. A portion of the second radiation body is parallel to a portion of the first radiation body in a specific distance. In addition, a wireless communication device and radio frequency chip having a built in dual band antenna device are also disclosed.

Abstract: The present invention is a spring-loaded manually extendable antenna for a mobile phone. An antenna extension system includes an extendable antenna stowed within an antenna housing. Within the antenna housing is a compressible spring. Attached to the bottom end of the antenna is a washer. The antenna is held in a stowed position by a manual release mechanism. When a mobile phone user desires, the manual release mechanism is depressed, which allows the antenna to be manually driven upward by the spring. The antenna is then extended to the extended position.

Abstract: A portable electronic device, including a base mechanically coupled to a display enclosure with a hinge, is built. The display enclosure includes at least one WAN antenna configured to rotate about an axis such that when closed the antenna forms part of the display enclosure, and when rotated to an open position the antenna extends above the display enclosure.

Abstract: The present invention relates to a pad having a recessive antenna and being mounted in an electronic device, comprises a pad mounted on a base plate of the electronic device and an antenna configured inside the pad. By the aforesaid structure, the electronic devices having wireless connectivity, such as multimedia computers, notebooks, or CD/DVD players, would then have more space for other functional design as well as easier assembly of the antenna.

Abstract: A stowable antenna system for a security system is providing which includes an electronic radiating element in the form of a furlable flexible sheet, a power supply to power the electronic radiating element and a housing to receive and store the radiating element in a furled condition. The radiating element may be extended to an unfurled condition for use in the security system. One or more risers may extend from the housing for supporting the radiating element in the unfurled condition. The electronic radiating element may be received in the housing and stored in the housing in a rolled up, windowshade configuration.

Abstract: Systems and methods provide an electronically controlled polarizer for antenna applications. For example, in accordance with an embodiment of the present invention, an electronically controlled dual polarizer is disclosed, which may selectively allow horizontally or vertically polarized signals to pass through (e.g., during transmission and/or reception) or selectively provide right hand or left hand circular polarization to a linearly polarized signal.

Abstract: An electromagnetic bandgap device is mountable on a RF disturbing structure of an antenna to minimize signal field disturbance imparted thereby. The RF disturbing structure is oriented in a direction substantially parallel to a path of travel of an antenna signal and located within a field covered by the signal transmitted by a feed. The bandgap device comprises a plurality of RF perturbing elements connected to the RF disturbing structure and spaced apart from one another in the direction substantially parallel to the signal path. The perturbing elements are positioned, configured and sized to direct a disturbed portion of the signal away therefrom to reduce field disturbance generated by the disturbed signal portion interacting with an undisturbed portion of the antenna signal.

Abstract: Compact multi-band antenna system (500) includes a main reflector (502) having a shaped surface of revolution about a boresight axis of the antenna operable at a plurality of frequency bands spectrally offset from each other. A multi band feed system (300) is provided for the main reflector that includes a subreflector (304) formed as a shaped surface of revolution about the boresight axis of the antenna, and a horn antenna (302). The horn antenna has one or more ridges (312) disposed in a throat region (314) of the horn antenna extending in a direction aligned with the boresight axis (3100 of the antenna. The horn antenna is coupled to the shaped surface of revolution defining the subreflector.

Abstract: An antenna for controlling a beam direction both in azimuth and elevation is disclosed. An antenna comprises a ground plane, at least one active element, and a plurality of passive elements. Both an upper half and a lower half of the passive elements are connected to the ground plane with variable reactive loads, whereby elevation angle of the radio beam is controlled by adjusting the variable reactive loads. Alternatively, an antenna may comprise a radio frequency (RF) choke coupled to the ground plane, whereby an elevation angle of the radio beam is controlled by controlling the RF choke. Alternatively, an antenna comprises a variable lens for changing a wave front of a radio wave which is passing through the variable lens, whereby the beam width and direction are controlled by the variable lens.

Abstract: An omnidirectional antenna and method of producing the omnidirectional antenna is provided. Generally, the antenna has a first board with a ground plane on a first side of the first board and a second board with one or more dipole antennas located next to a first edge of the second board and one or more dipole antennas located next to a second edge opposite the first edge. The second board is located approximately perpendicular to the first board and approximately centered about the first board.

Abstract: A dielectric resonator element array (DRA) antenna system and method for using same is disclosed. The dielectric resonator antenna system includes a ground plain, a feed structure, an array of dielectric resonator elements electrically coupled to the feed structure, each dielectric element having a relatively high permittivity, a radome close to or in contact with the array of dielectric resonator elements, an object mounting apparatus for mounting the antenna system on an object, and a beam shaping and steering controller, the beam shaping and steering controller controlling the feed structure to thereby control excitation phases of the dielectric resonator elements.

Abstract: An antenna has a central core with a central coupling region. At least one pair of radiating antenna lines is formed a surface of the central core in a helix structure. A circuit board has a protruding structure and is electrically coupled to the pair of radiating antenna lines. The protruding structure of the circuit board affixes into the central coupling region of the central core, and a signal input/output (I/O) end of the antenna is on the circuit board. The circuit board has a balun transformer, preferably using the LC resonators in two paths with a desired equivalent resonant length, so as to preferably produce the difference by half wavelength.

Abstract: A multiple monitor apparatus in the form or a laptop PC, a desktop monitor, a mobile device, and the like. In dual screen mode, the additional monitor is typically presented displaying different content and centered to the user. In single screen mode, the additional display enclosures are retracted and stored in such a manner that they do not present themselves to the user. A guiderail assembly is used to center both display enclosures relative to the user. The guiderail assembly may be motorized or manually effected and may be located above or below the primary enclosure hinge. The secondary enclosure may be extended and retracted from the primary enclosure by the use of slider arms. The secondary enclosure may also be hinged to the primary enclosure, utilize pegs, ride on its own guiderail, and detach from the primary enclosure or the apparatus. Independent guiderails may also be employed to center two or more displays relative to a user.

Abstract: A stereoscopic image display device including a light source and a light controller for selectively transmitting or blocking light provided by the light source. The light controller includes a first substrate, and first and second electrodes alternatively formed on the first substrate along a first direction. The first and second electrodes are spaced apart from each other at a predetermined interval. The first and second electrodes are electrically connected, respectively, to first and second connection electrodes. The light controller also includes a second substrate which is substantially parallel to the first substrate, and third and fourth electrodes alternately formed on the second substrate along a second direction. The third and fourth electrodes are spaced apart from each other at a predetermined interval. The third and forth electrodes are electrically connected, respectively, to third and fourth connection electrodes.

Abstract: The invention relates to an arrangement for the display of images perceivable in three dimensions, comprising an image generator provided with a great number of picture elements (pixels) (?ij) arranged in a grid of rows (j) and columns (i), the pixels (?ij) displaying bits of partial information from at least two views (Ak) (k=1 . . . n, n?2) of a scene or object in a two-dimensional, essentially periodic combination structure. The invention also includes one or several arrays of a great number of wavelength or gray level filters arranged in rows (q) and columns (p) and configured as filter elements (?pq), part of which are transparent to light of specified wavelength ranges, while the remaining part are opaque to light. These filter elements are arranged (in viewing direction) either in front of or behind the image generator with the pixels (?ij).

Abstract: In a display device, one field is divided into two groups of subfields. Light-emitting cells are selected by a selective write process in a first group of subfields and a gray scale is represented by a combination of weights of subfields. Light-emitting cells are selected by the selective write process in a first subfield of a second group of subfields, and non-light-emitting cells are selected from the light-emitting cells by a selective erase process in the remaining subfields of the second group of subfields. In the second group of subfields, a gray scale is represented by the sum of weights of subfields from when the light-emitting cell is selected in the first subfield to when the non-light-emitting cell is selected. In this manner, a gray scale of one field may be represented by a combination of the first and second groups of subfields.

Abstract: This invention relates to a method of driving a plasma display panel that is adaptive for generating a stable sustain discharge in a low opposition discharge voltage to improve a driving efficiency. A method of driving a plasma display panel, time-dividedly driven by dividing a plurality scan electrodes, sustain electrodes, and address electrodes into an initialization period, an address period, and a sustaining period, according to the present invention includes: applying a positive direct current voltage to the address electrode in the sustaining period; and applying a positive first sustaining pulse to the scan electrode and a positive second sustaining pulse to the sustain electrode, in the sustaining period.

Abstract: An active organic electroluminescence display panel module comprising a substrate, a plurality of organic light-emitting devices, a light-emitting device driving unit and a temperature sensor unit are provided. The light-emitting device driving unit is electrically connected to the organic light-emitting devices for driving them. The temperature sensor unit is disposed on the substrate for sensing the temperature of the active organic electroluminescence display panel. The temperature sensor unit is also electrically connected to the light-emitting device driving unit for providing a signal to the light-emitting device driving unit in response to the sensed temperature. Accordingly, the light-emitting device driving unit can adjust the driving voltage of the organic light-emitting devices in the active organic electroluminescence display panel to reduce overall power consumption and provide an accurate grayscale to improve the quality of displayed images.

Abstract: Disclosed is an OELD and a pixel circuit which comprise: an organic EL element for emitting light corresponding to a supplied current; a first switch for switching data voltage supplied to a data line in response to a select signal supplied to a scan line; a first TFT for supplying the current to the organic EL element in response to the data voltage supplied to a gate of the first TFT via the first switch; a second TFT having a gate coupled to the gate of the first TFT and compensating for a deviation of a threshold voltage of the first TFT; and a capacitor for maintaining the data voltage supplied to the gate of the first TFT during a predetermined time.

Abstract: A drive device for a light-emitting display panel in which pixels respectively including light-emitting elements are arranged at crossing positions of a plurality of data lines and a plurality of scanning selection lines in the form of a matrix. A 1-frame period is time-divided into a plurality of sub-frame periods, grayscale bits for setting ON periods are allocated to the sub-frames, respectively, to perform weighting, grayscale display is performed by summing the ON periods of the sub-frames, and a frame frequency of the 1-frame period is set within a range of 100 Hz to 150 Hz.

Abstract: A display element includes a variable optical element that changes appearance in response to changes in current, and a programmable resistance in series with the variable optical element. The resistance of the programmable resistance decreases in response to a first current in a first direction. The resistance of the programmable resistance increases in response to a second current in a second direction.

Abstract: The invention is directed to a display device that can display a grayscale image by a digital drive method, without a frame memory and heat generation of the display device caused by a drive current. Without dividing one field period into a scan period and a light emission period as in an organic EL display device using a conventional digital drive method, image data from a data line are written in pixels in each of lines, and ramp voltages generated for each of the lines and image data voltages are compared with each other, and light emission display is performed based on the comparison result. This can provide a display device that can display a grayscale image by a digital drive method without the frame memory. Furthermore, an electric current to be supplied to the organic EL elements is reduced, so that the heat generation of the display device can be prevented to enhance reliability.

Abstract: In organic emitting diode circuit that is equipped with voltage compensation function and a method for compensating voltage in the organic light emitting diode circuit are presented. The circuit includes a first transistor, a pixel control unit, a precharge control component and an OLED. The present invention OLED presents numerous benefits when compared to conventional OLED such as the present invention OLED can be designed as a common cathode component such that it has improved aperture ratio, it enables array testing of the circuit before the fabrication process is completed, and it allows color and brightness compensation in addition to voltage compensation.

Abstract: A light emitting element drive circuit and a display system able to simultaneously perform constant current control and PWM control and able to perform a stable adjustment of luminance over a wide dynamic range, including a constant voltage source having an output voltage adjustment unit able to be changed in output voltage according to a signal from the outside, a switch circuit connected to the cathode side of the LED and ON/OFF controlled in accordance with a PWM signal from the outside, a current detection unit for detecting the current flowing in the circuit, and a sample and hold circuit for maintaining the current input value from the current detection unit for a constant period, and the output voltage adjustment unit receives as input the output of the sample and hold circuit, that is, the current value when the switch circuit is ON, and adjusts the output of the constant voltage source so that this value becomes a previously determined set value, to thereby make the current flowing in the LED constan

Abstract: Disclosed is a liquid crystal screen display method, such that when displaying the images each composed of the temporal sequence of frames on the liquid crystal screen, the darkening frames are inserted between the said frames, and each darkening frame is darker than the previous frame.

Abstract: A liquid crystal display device includes an liquid crystal display panel and a panel driving unit that generates a driving signal to drive the liquid crystal display panel according to a video signal provided by a scaler. The liquid crystal display device further includes a user input unit that adjusts a brightness of a screen displayed on the liquid crystal display panel, and a microcomputer that controls the panel driving unit such that a voltage of the panel driving signal outputted from the panel driving unit can be maintained within a predetermined voltage range, such that a voltage of a panel driving signal inputted to a liquid crystal display panel is maintained at a constant level regardless of the adjustment of brightness, thereby enabling to preventing occurrence of flickering phenomenon.

Abstract: A method for driving an LCD panel is provided. The method includes the steps of providing a scan signal to each of the scan lines during the scan period of each scan line, providing a plurality of panel control signals in a first permutation to the horizontal switch during the scan period of a first scan line, and providing a plurality of panel control signals in a second permutation to the horizontal switch during the scan period of a second scan line, wherein the second permutation is different from the first permutation.

Abstract: A pixel equivalent circuit and a method for improving a hold-type effect are disclosed. The present invention provides a capacitor having a plurality of pixel charging paths for a pixel equivalent circuit and supplies a target image voltage and such as a black image voltage or a compensating voltage to the capacitor during a corresponding duty cycle. Therefore, a color curve, which is shown by a corresponding pixel of the pixel equivalent circuit of the present invention, is similar to that of the CRT monitor or the speed of renewing data of the target image voltage is raised such that the pixel equivalent circuit of the present invention is capable of improving the color-renewing speed and image quality while processing moving images.

Abstract: A liquid crystal display apparatus includes a plurality of pixels arranged in matrix form including respective transistors, a plurality of gate bus lines, each of which is coupled to gates of the transistors arranged in a corresponding single row, a plurality of data bus lines, each of which is coupled to one end of channels of the transistors arranged in a corresponding single column, a gate driver configured to successively drive the plurality of gate bus lines, and a timing control circuit configured to supply to the gate driver a timing signal indicative of a start of the successive driving of the plurality of gate bus lines and to mask the timing signal for a predetermined time period following the supplying of the timing signal.

Abstract: A clock pulse with a smaller amplitude voltage than the power supply voltage of the shift register is inputted to the shift register. The gate width of a TFT that constitutes a second clocked inverter of the shift register is set wide so as to reduce fluctuation in output electric potential due to leak current of a first clocked inverter. Further, a TFT is added to a first clocked inverter. A signal with an amplitude voltage of the same level as the power supply voltage is inputted to a gate electrode of the added TFT to switch between ON and OFF. The leak current of the first clocked inverter is thus cut off.

Abstract: A display device capable of switching a screen between a display in the vertical direction and a display in a horizontal direction. The scanning direction of a first gate signal line driver circuit is perpendicular to that of a source signal line driver circuit, and the scanning direction of a second gate signal line driver circuit is perpendicular to that of the first gate signal line driver circuit. In a normal display, the vertical scanning of a screen is performed by the first gate signal line driver circuit. Meanwhile, in the case of switching between the display in the vertical direction and the display in the horizontal direction, the vertical scanning of the screen is performed by the second gate signal line driver circuit. The screen is driven by a field sequential method and a pixel is not divided into RGB; therefore, switching of the display direction can be facilitated.

Abstract: A liquid crystal display device include pixels arranged in a matrix on a substrate, columns of signal lines for supplying image signals to respective columns of pixels, rows of scanning lines for use in selecting respective rows of pixels, a signal line driving circuit including selecting circuits for supplying associated image signals in each of horizontal periods in such a manner as to supply image signals supplied through the signal lines and associate with a ½ horizontal line, and then other image signals supplied through the signal lines and associated with the other ½ horizontal line, a scanning line driving circuit connected to the plurality of scanning lines, for successively selecting the scanning lines, and a controller for controlling the signal line driving circuit and the scanning line driving circuit, the controller including means for turning off the selecting circuits in a blanking period.

Abstract: A light emitting diode (LED) driving apparatus includes a drive section for driving an LED to emit light, and a control section that controls a driving current supplied from the drive section to the LED. The control section implements luminous power control by controlling an ON/OFF ratio of the driving current if a target value of luminous power of the LED is smaller than a predetermined value. The control section implements luminous power control by controlling a level of the driving current if the target value is equal to or larger than the predetermined value.

Abstract: A display device includes a backlight assembly, a display panel unit, and a control member. The backlight assembly emits a first light and a second light. The display panel unit includes a first display panel and a second display panel, and receives the first light and the second light to display a first image and a second image, respectively. The control member controls an interval between the backlight assembly and the display panel unit. The interval is controlled in a method of positioning the first display panel, thereby emphasizing the display panel unit and diversifying a design of the display device.

Abstract: A data input system, with which a user can input letters of an alphabet comprises: a system (112,108) for enabling the user to select one of four options and, for each selected option, to select one of eight directions; a system (114,110) for detecting the option and direction selected by the user; and a decoder (116) responsive to the detected option and direction and operable to interpret each of a number of combinations of such an option and such a direction, equal to the number of letters in the alphabet, as a respective letter of the alphabet. Directions may be selected by, for example, operating an eight-way joystick, making directional gestures on a touch-sensitive surface, or pressing different combinations of keys in a key array. Options may be selected by for example, operating an four-way joystick, pressing one or more shift keys and/or by providing more than one direction selection system so that the user can select which direction selection system to use for a particular letter.

Abstract: An input detection device contains a button set having a plurality of buttons utilized for inputting commands, each button outputting a unique voltage level when the button is activated. The input detection device also contains a voltage generating circuit for outputting a plurality of generated voltage levels corresponding to the unique voltage levels outputted by each of the buttons in the button set, and a comparator for comparing each of the generated voltage levels outputted from the voltage generating circuit with the voltage outputted from the button set. A control circuit controls the voltage generating circuit to alternately output each of the generated voltage levels, records the generated voltage level that is approximately equal to the voltage outputted from the button set, and determines which button in the button set was activated based on the recorded generated voltage level.

Abstract: Certain embodiments of the present invention provide a method and system for using gaze detection to improve information display in a healthcare environment. Certain embodiments of a system include an eyewear headset for detecting a location of a user's gaze and a display for displaying information. Information on the display, such as images and/or data, is customized for the user based on the user's gaze. In an embodiment, the eyewear headset viewer projects information into the user's oculars for an individual information display. The system may also include a conflict resolution module for determining priority and control of the display among a plurality of users. In an embodiment, a function at the display may be triggered using a voice command, a gesture, and/or a gaze, for example.

Abstract: A method of sensing dynamics associated with a device is disclosed. The method includes using at least one micro-machined electromechanical systems (MEMS) storage element of a memory module of the device as a motion sensor to detect motion associated with the device. The method further includes processing data output from the MEMS storage element to determine information relating to the dynamics of the device.

Abstract: A computer keyboard is provided that has one and only one row of keys for inputting letters. The keys of the row can each represent one of at least three letters. Thus, the row can instantiate the top row of letters in a conventional QWERTY layout, or the middle row, or the bottom row, or even the number row depending on what the user selects, thereby consuming less space than a conventional multi-row QWERTY keyboard and also thereby presenting enhanced ergonomics relative to a conventional QWERTY layout.

Abstract: A human machine interface includes user control, a controller, a display, and a proximity sensor. The controller is configured to control the display based on the proximity sensor. When an object is sensed by the proximity sensor the controller activates the display. In addition, the controller may display information corresponding to the user setting manipulated by the human machine interface.

Abstract: An input device with three-dimensional, six-degrees-of-freedom data input for a computer having a tracker with an array of tracking points defining a first axis and a second axis or plane is described. Light reflected from, or given off from the tracking points, is captured by a camera. From the two-dimensional images captured, three-dimensional data relating to the position and orientation of the input device may be obtained from the relative positions of the tracking points by a provided algorithm and lookup table. The use of one of the tracking points as an on-off indicator of the tracker's orientation towards or away from the camera greatly expands the use of such technology from limited hemispherical tracking to all-round, full-spherical tracking.

Abstract: A system and method for enabling a user to input characters using a directional pad of a computing device. The directional pad is configured to generate directional inputs. The invention creates mappings for the directional inputs where each of the mappings associates at least one of the directional inputs with at least one of the characters. The user may activate one of the mappings by selecting one of the directional inputs. While the mapping is activated, the user may input a character by selecting a directional input associated with that character.

Abstract: A computer pointer control device includes a support base and a keyboard. The device includes a structure configured to reduce friction between the support base and an underlying surface. A wrist support is positioned on the support base, configured to receive a user's wrist thereon such that keys of the keyboard are under the fingers of the user's hand, while the user is able to slide the device over the underlying surface by applying lateral pressure to the wrist support. A position tracking mechanism coupled to the device is configured to detect horizontal movement of the base over the underlying surface and transmit a signal to an associated computer to control an on-screen pointer. The device may be configured to receive both of a user's wrists or may be one of a pair of similar pointer control devices configured to be independently controlled by the user.

Abstract: A pointing device is placed in a through hole provided on an outer case of the portable information terminal. The terminal includes a fingerplate attached to a through hole via a hinge; an image pick-up element placed on a circuit board; a condensing lens that forms an image on an outer surface of the fingerplate on an image pick-up plane of the image pick-up element; and a light emitting device that irradiates the outer surface of the fingerplate with illumination light, and takes the image of a pattern such as a fingerprint that touches the outer surface of the fingerplate by using the image pick-up element. When the fingertip moves, the image taken by the image pick-up element changes and the pointer displayed on a display screen is moved in a direction according to the movement of the fingertip.

Abstract: A multi-purpose joystick with input device includes joystick interface for TV game basic control keys and functional keys and built-in vibration function, keyboard interface related to a micro-USB keyboard for input with MARCO function keys to setup common terms for fast completion of input, IC circuit board to control functions of both interfaces, and signal line unit linked to game host to control and input characters; and 3D part of the joystick allowing shift to simulate mouse function.

Abstract: A computer mouse structure for preventing foreign materials from accumulating on an X-axle and a Y-axle in the computer mouse includes two scraper seats located on an inner side of a lower shell of the mouse on one side of the X-axle and the Y-axle opposite to a track ball which is in contact with the X-axle and the Y-axle. Each of the scraper seats has a scraper which is spaced from the axle at a selected gap to remove the foreign materials attached to the axle when the foreign materials reach the scraper during rotation of the axle.

Abstract: A mouse with audio output function includes a control circuit, a volume control for adjusting high/low level of audio signals, an ON/OFF switch for supplying or cutting off power output from the control circuit, an amplifying circuit for amplifying audio signals, and a sound output device. A terminal is connected to an audio output on a computer to transmit audio signals from the computer to the amplifying circuit in the mouse. The audio signals amplified at the amplifying circuit are output via the sound device as sound. The mouse can therefore replace conventional sound playing devices and allows a user to enjoy sound from the computer without the need of installing separate speakers. Moreover, the mouse is directly supplied with power from the computer without the need of an external power source to drive the audio output function, and could be conveniently carried along with the user for use at different places.