Abstract: An audio playback system includes a handheld device and a digital stereo set. By the handheld device, a control message is converted into a pulse signal. Moreover, the on/off states of a visible light emitting element are controlled according to first pulse signal, so that a visible light signal is generated. After the visible light signal is received by an optical sensor of the digital stereo set, the visible light signal is restored to the control message. After the control message is received by the digital stereo set, the digital stereo set performs a corresponding control action.

Abstract: A touch pen for a capacitive touch screen is provided. The touch pen includes a signal receiver conductor, a signal detecting and adjusting circuit, and a signal transmitter conductor. The signal receiver conductor receives a first touch signal from the capacitive touch screen. The signal detecting and adjusting circuit enlarges the first touch signal to a second touch signal having a standard intensity with a first magnification factor, a second magnification factor and a third magnification factor. The signal transmitter conductor issues the second touch signal to the capacitive touch screen. According to the second touch signal, the capacitive touch screen senses a position of a touch point of the touch pen.

Abstract: A key structure includes a base plate, a switch circuit board, a keycap, and an enclosure frame. The keycap includes a magnetic element. The magnetic element is disposed on an edge part of the keycap. The enclosure frame includes a magnetic coating layer. The magnetic coating layer is formed on an edge part of the enclosure frame and disposed over the magnetic element. When the keycap is depressed, the keycap is moved to trigger the switch circuit board, so that the switch circuit board generates a key signal. When the keycap is no longer depressed, the keycap is moved toward the magnetic coating layer in response to the magnetic force. The key structure can be normally operated without the need of installing an elastic rubbery element.

Abstract: A luminous keyboard device includes a keypad module, a supporting plate, a flexible circuit board, a light-emitting element, a reflective layer, and a light guide plate. The supporting plate includes plural receiving parts. The flexible circuit board is contacted with the plural receiving parts to form plural bent structures. The light-emitting element and the reflective layer are disposed on the flexible circuit board. When a light beam is emitted by the light-emitting element, the portion of the light beam that is not directed to the light guide plate is reflected back to the light guide plate by the reflective layer on the plural bent structures. Consequently, the amount of light introduced into the light guide plate increases.

Abstract: A buzz detecting method and a buzz detecting system are provided for testing whether an under-test sound playing device generates a buzz while playing sound. By an application program module, plural under-test sound signals from the under-test sound playing device are converted into plural under-test frequency-domain signals corresponding to the under-test sound signals through Fourier transform. Moreover, the application program module calculates plural under-test noise ratios corresponding to the frequencies of respective under-test sound signals according to respective under-test frequency-domain signals. After the plural under-test noise ratios are compared with plural standard noise ratios from a standard sound playing device, the application program module may automatically judge whether the under-test sound playing device generates a buzz while playing sound. Since the testing procedure does not need to be implemented by the trained testers, the overall efficiency is largely enhanced.

Abstract: An illuminated keyboard includes a key, a light guide plate, a sensing circuit layer, and a light-transmissible elastic element. The light-transmissible elastic element is disposed under the key. The light-transmissible elastic element has a light-diffusing part. The light guide plate and the sensing circuit layer are disposed under the light-transmissible elastic element. The sensing circuit layer is used for generating a non-contact key signal. After the light beam transferred within the light guide plate is transmitted upwardly through the light guide plate, the light beam is transmitted through the light-transmissible elastic element. Moreover, since the optical path of the light beam is changed by the light-diffusing part, the light beam can be projected onto the whole keycap more uniformly.

Abstract: A keyboard device with a luminous key is provided. The keyboard device includes at least one luminous key, a light-emitting element, and a light shade, and a membrane switch circuit module. When the membrane switch circuit member is triggered by the at least one luminous key, the membrane switch circuit member generates at least one luminous key signal. The light-emitting element is used for emitting a light beam. The light shade is used for shading the light beam. Moreover, the light shade and the membrane switch circuit member are integrally formed with each other. Consequently, the light shade can be securely fixed on the membrane switch circuit module.

Abstract: A key structure includes a base plate, a keycap, a scissors-type connecting member, and an elastic element. The scissors-type connecting member is connected with the base plate and the keycap. After the key structure is assembled and the keycap is not assembled, the elastic element provides an upward first elastic force, and the scissors-type connecting member is bent to provide a downward second elastic force. By exerting a small force on the keycap, the key structure can be triggered.

Abstract: A keyboard device with a luminous key is provided. The keyboard device includes at least one luminous key, a top-view light-emitting element, and a light shade. The top-view light-emitting element is used for emitting a light beam. The light shade is used for shading the light beam. Moreover, the light beam is transmissible through a light-outputting part of the light shade to illuminate the luminous key. The at least one luminous key includes at least one keycap and at least one elastic element. The elastic element and the light shade are integrally formed with each other. Since the total area of the bottom surfaces of the elastic element and the light shade is increased, the light shade can be securely fixed.

Abstract: A protecting device with keys' functions is provided. The protecting device includes a triggering member, a printed circuit board, and plural curable resinic structures. The printed circuit board includes plural first contacts. The plural first contacts are disposed on a top surface of the printed circuit board. The triggering member is disposed over the printed circuit board. The triggering member includes plural second contacts. The plural curable resinic structures are arranged between the triggering member and the printed circuit board for separating the plural first contacts and the plural second contacts from each other. Since the triggering member, the printed circuit board and the plural curable resinic structures of the protecting device of the present invention may replace the keys and the membrane switch circuit module of the conventional keyboard device, the thickness of the protecting device is largely reduced.

Abstract: A facial tracking method for detecting and tracking at least one face image in a region during a time period. The facial tracking method includes a step of performing an image acquiring operation, a step of performing a facial detecting operation to detect whether there is any face image in the entire of a current photo image, and at least one step of performing a facial tracking operation. For performing the facial tracking operation, plural tracking frames are located around a face image of the current photo image, and a similarity between the face image of the current photo image and the image included in each tracking frame in order to judge whether the face image exists in the next photo image. By the facial tracking method of the present invention, the time period of tracking face images is largely reduced.

Abstract: A passive touch pen for a capacitive touch screen is provided. The passive touch pen includes a first pen tube, a second pen tube, a conductive rubber tip, a switch member, a circuit board, a positive electrode part, a conductive plate, and a battery. The switch member includes a rotary element, a first conductive element, a second conductive element, and a negative electrode part. While the second conductive element is correspondingly rotated with the rotary element to be contacted with the negative electrode part, a conductive loop is defined by a negative trace, the conductive plate, the first pen tube, the first conductive element, the second conductive element, the negative electrode part, the battery, the positive electrode part and a positive trace collaboratively. Through the switch member, the function of providing electric power of a battery can be easily achieved. Consequently, the power-saving efficacy is enhanced.

Abstract: A passive touch pen for a capacitive touch screen is provided. The passive touch pen includes a pen tube, a fixing post, and a conductive rubber tip. The pen tube has a vent. The fixing post is disposed within the pen tube, and includes a first perforation and a second perforation. The first perforation is open to a top surface of the fixing post. The second perforation is open to a lateral surface of the fixing post. The conductive rubber tip is sheathed around the fixing post and exposed outside the pen tube. After the conductive rubber tip is no longer compressed, air can be quickly introduced into to a vacant space between the conductive rubber tip and the top surface of the fixing post through the vent, the second perforation and the first perforation. Consequently, the conductive rubber tip is restored to an original non-compressed shape.

Abstract: A group printing method and a group printing system are provided. The group printing system includes a control point, an intermediary printing device, and plural digital media printers. The group printing method includes following steps. The control point and the intermediary printing device issue device search broadcasts. The intermediary printing device and each of the digital media printers issue response broadcast to the control point and the intermediary printing device. At least two of the plural digital media printers are set as a printer group. The intermediary printing device splits the print command into plural split print commands and transmits the plural split print commands to the digital media printers of the printer group. Since the print command is split into the plural split print commands and the plural split print commands are executed by respective digital media printers, the printing speed is enhanced.

Abstract: A wireless power transmission device includes a main body and a position-limiting plate. The main body includes a triggering button. The triggering button is located at a first side of the main body. The position-limiting plate is located at a second side of the main body and movable relative to the main body. When an electronic device is placed on the main body and contacted with the triggering button, the triggering button issues an enabling signal to the position-limiting plate. In response to the enabling signal, the position-limiting plate is moved toward the main body in order to fix the electronic device on the main body. In a case that an electric current provided to the triggering button is interrupted, the triggering button stops issuing the enabling signal. Consequently, the position-limiting plate is moved away from the main body and separated from the electronic device.

Abstract: An illuminated keyboard includes a keycap, a keycap guiding frame, a light guide plate and a sensing circuit layer, which are sequentially arranged from top to bottom. The keycap guiding frame is used for fixing the keycap and guiding movement of the keycap. The light guide plate is used for fixing the keycap guiding frame and transferring the light beam from a light-emitting element. As the keycap is depressed by the user, the approaching keycap is sensed by the sensing circuit layer, and thus the sensing circuit layer generates a corresponding non-contact key signal.

Abstract: An audio playback system includes a handheld device and a digital stereo set. By the handheld device, a control message is converted into a modulation signal. The modulation signal is transmitted to a speaker, thereby controlling the speaker to generate a modulated sound wave signal. After the modulated sound wave signal is received by a built-in microphone of the digital stereo set, the modulated sound wave signal is restored to the control message. After the control message is received by the digital stereo set, the digital stereo set performs a corresponding control action.

Abstract: A mouse device includes an upper cover, an intermediate cover, a lower cover, a circuit board, and two switches. Two protrusion posts of the upper cover are respectively penetrated through two perforations of the intermediate cover. Two first pivotal parts of the upper cover are respectively connected with two second pivotal parts of the intermediate cover. The upper cover is fixedly connected to an annular sidewall of the lower cover. The circuit board and the two switches are disposed on the lower cover. When the upper cover is rotated relative to the intermediate cover through the two first pivotal parts and two second pivotal parts, one of the two switches is triggered by the corresponding protrusion post so as to generate a corresponding electronic signal. The use of the present mouse device can prevent from introducing foreign matters, reduce the depressing force and avoid erroneously triggering the switch.

Abstract: A photo media printing method includes the following steps. Firstly, a photo media file is selected by a digital media controller of an area network. Then, a marked is added to the selected photo media file by the digital media controller, so that a new photo media file containing the mark is produced. Afterwards, the new photo media file is transmitted to a network printing device of the area network, and the new photo media file is printed out by the network printing device. In other words, the mark is added to the photo media file by simply selecting the photo media file.

Abstract: A photo media printing method includes the following steps. Firstly, a photo media file is selected by a digital media player of an area network. Then, a marked is added to the selected photo media file by the digital media player, so that a new photo media file containing the mark is produced. Afterwards, the new photo media file is transmitted to a network printing device of the area network, and the new photo media file is printed out by the network printing device. In other words, the mark is added to the photo media file by simply selecting the photo media file.