Patent application number | Description | Published |
20080290667 | Latch assembly for an electronic device - A latch assembly for an electronic device has at least one recessed latch and at least one protruding latch. Each recessed latch has two latch brackets, each having a guiding recess and a latch slot formed between the latch brackets having two catch grooves formed transversely on the latch bracket opposite to each other. Each protruding latch includes at least one resilient latch bar perpendicularly. The latch bar has a head having at least one protruding face, guided by the guiding recesses of the latch brackets and selectively engaging with the catch grooves of the respective latch slot. Accordingly, precise pre-alignment between the protruding latch and the recessed latch may not be necessary. Despite frequent use, the heads of the latch bars of the protruding latches are hardly broken or worn, so maintain a secure hold for longer than prior art. | 11-27-2008 |
20100292925 | Direction Indication Device of a Global Positioning System - The present invention is a direction indication device of a global positioning system which is composed of a host having a voice device and a display panel. An exterior of the display panel is enclosed with a cover, a proper position on which is installed with an indication unit including at least one illumination element. Each illumination element represents a direction indication. An interior of the host also includes a navigation module which produces a navigation signal and a direction indication module which produces an indication signal on the indication unit. After the direction indication module has received the navigation signal, the illumination element representing the direction will produce light to represent the direction indicated by the navigation signal, such that a driver can be indicated with the direction on the display panel without watching at the global positioning system. | 11-18-2010 |
20100327711 | Cover Member of a Global Positioning System - A host of a global positioning system is enclosed by a cover member having a joint member to connect the host, and the host has a butt joint member to connect the cover member. The joint member is conveniently assembled with and disassembled from the butt joint member, to assemble or disassemble the cover member on or from the host as needed. The host includes a rear cap, at least one location on which is connected with the cover member, and the rear cap has a joint member to connect the host, for assembling or disassembling the cover member on or from the host, as needed. Therefore, the cover member and the rear cap of the global positioning system can be replaced respectively by one own according to a user's needs and preferences, to match color and shape of the global positioning system to be used. | 12-30-2010 |
20100329662 | Photographing Device of a Global Positioning System - A photographing device of a global positioning system includes a casing, a display screen, a control circuit board and a photographing device. A side of the casing is the display screen, the casing contains a holding space, and the holding space includes the photographing device which is assembled with the control circuit board by an electric connection assembly. The control circuit board includes an access unit, a positioning and transmission unit, a computing unit and a battery unit. When the photographing device is used, the photographing device starts to shoot and record. Next time when a car is driving on a route, an image of which is stored by the photographing device, the photographing device compares the route image recorded with the route image planned by a user; after comparison, the route image that fits is transmitted to the display screen by the access unit to facilitate watching. | 12-30-2010 |
Patent application number | Description | Published |
20080309244 | Primary-side driving control circuit for backlight of LCD panel - The present invention discloses a primary-side driving backlight circuit for LCD panel. The primary-side driving backlight circuit employs a single isolation device to achieve isolation request for safety for the secondary side. The PWM controller on the secondary-side of a transformer generates a control signal according to a feedback signal. The control signal is transmitted by the isolation device to a High/Low side driver. The High/Low side driver has a High Output and a Low Output, which drives power switches at high side and low side respectively, in order to control the power of an input source transmitting into the transformer and further control the voltage and current of cold cathode lamp(s) of a backlight circuit. | 12-18-2008 |
20090109711 | Three-pin integrated synchronous rectifier and a flyback synchronous rectifying circuit - A three-pin integrated synchronous rectifier is the synchronous rectifier chip where the quantity of connection pins is the smallest possible quantity. The three-pin integrated synchronous rectifier uses a control pin to receive a control signal used as a power bias voltage and a synchronous pulse to make the synchronous rectifier chip operate normally. The control signal is obtained from the output pin of an auxiliary winding via a diode. The other pins are respectively the drain pin and the source pin of an internal power transistor and are connected with the output winding and the voltage output terminal for transmitting the power of the transformer to supply current for the loading. | 04-30-2009 |
20090168464 | Synchronous rectifier control device and a forward synchronous rectifier circuit - A synchronous rectifier control device comprises a status detecting unit, an analog circuit, a first counter, a second counter and a signal process unit. The status detecting unit receives at least one reference signal and a detecting signal to generate a first synchronous control signal. The analog circuit generates a delay signal in accordance with the first synchronous control signal. The first counter receives a clock signal and generates a first counter signal in accordance with the first synchronous control signal, the clock signal, and the delay signal. The second counter receives the clock signal and generates a second counter signal in accordance with the first synchronous control signal, the clock signal, and the first counter signal. The signal process unit generates a second synchronous control signal in accordance with the first synchronous control signal and the second signal. | 07-02-2009 |
20090267577 | High voltage start-up circuit with constant current control - A high voltage start-up circuit with constant current control applied to a switching mode power converter is provided. The high voltage start-up circuit includes a high voltage junction transistor, a control transistor, a current detecting resistor and a bias resistor. The drain of the junction transistor is connected to a high power supply, the gate of the junction transistor is connected to the drain of the control transistor, and the source of the junction transistor is connected to the current detecting resistor. The voltage drop crossing the current detecting resistor is kept constant to have the junction transistor output a constant current. The bias resistor which is connected between the gate of the junction transistor and the output end of the high voltage start-up circuit has the gate to source bias voltage of the junction transistor kept constant to output constant current. | 10-29-2009 |
20110032732 | Secondary side post regulator of flyback power converter with multile outputs - A flyback power converter with multiple outputs has a transformer, a low-voltage output circuit, a high-voltage output circuit, and a secondary side post regulator circuit is provided. The transformer has a first secondary winding and a second secondary winding. The low-voltage output circuit has a low-voltage output capacitor and a rectifier unit, and is coupled to the first secondary winding to generate a low voltage output. The high-voltage output circuit has a high-voltage output switch and a high-voltage output capacitor, and is coupled to the second secondary winding to generate a high voltage output. The secondary side post regulator circuit adjusts on-time of the high-voltage output switch according to a feedback signal to have the energy stored in the high-voltage capacitor transmitted to the low-voltage capacitor to lower down the voltage level of the high output voltage. | 02-10-2011 |