| Patent application number | Description | Published |
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| 20090146724 | SWITCHING CIRCUIT FOR MILLIMETER WAVEBAND CONTROL CIRCUIT - Provided is a switching circuit for a millimeter waveband control circuit. The switching circuit for a millimeter waveband control circuit includes a switching cell disposed on a signal port path to match an interested frequency and including at least one transistor coupled vertically to an input/output transmission line and a plurality of ground via holes disposed symmetrically in an upper portion and a lower portion of the input/output transmission line; capacitors for stabilizing a bias of the switching cell; and bias pads coupled in parallel to the capacitor to control the switching cell. Therefore, the switching circuit may be useful to improve its isolation by simplifying its design and layout through the use of symmetrical structure of optimized switching cells without the separate use of different switch elements, and also to reduce its manufacturing cost through the improved yield of the manufacturing process and the enhanced integration since it is possible to reduce a chip size of an integrated circuit in addition to its low insertion loss. | 06-11-2009 |
| 20100133551 | HIGH-SPEED OPTICAL INTERCONNECTION DEVICE - Provided is a high-speed optical interconnection device. The high-speed optical interconnection device includes a first semiconductor chip, light emitters, optical detectors, and a second semiconductor chip, which are disposed on a silicon-on-insulator (SOI) substrate. The light emitters receive electrical signals from the first semiconductor chip to output optical signals. The optical detectors detect the optical signals to convert the optical signals into electrical signals. The second semiconductor chip receives the electrical signals converted by the optical detectors. | 06-03-2010 |
| 20110037521 | POWER AMPLIFIER HAVING DEPLETION MODE HIGH ELECTRON MOBILITY TRANSISTOR - Provided is a power amplifier including: a depletion mode high electron mobility transistor (D-mode HEMT) configured to amplify a signal inputted to a gate terminal and output the amplified signal through a drain terminal; an input matching circuit configured to serially ground the gate terminal; and a DC bias circuit connected between the drain terminal and a ground. Through the foregoing configuration, the HEMT may be biased only by a single DC bias circuit without any biasing means to provide a negative voltage. Also, superior matching characteristic may be provided in various operation frequency bands through a shunt inductor and a choke inductor. | 02-17-2011 |
| 20110057853 | PATCH ANTENNA WITH WIDE BANDWIDTH AT MILLIMETER WAVE BAND - Provided is a millimeter wave band patch antenna. The patch antenna includes a multi-layer substrate, at least one metal pattern layer, an antenna patch, a ground layer, and a plurality of vias. In the multi-layer substrate, a plurality of dielectric layers are stacked. The metal pattern layer is disposed between the dielectric layers except for a center region of the multi-layer substrate. The antenna patch is disposed on an upper surface of the multi-layer substrate in the center region. The ground layer is disposed on a lower surface of the multi-layer substrate opposing to the upper surface. The vias is disposed around the center region through the dielectric layers for electrically connecting the metal pattern layer to the ground layer. The center region, which is surrounded by the ground layer and the vias, functions as a resonator. | 03-10-2011 |
| Patent application number | Description | Published |
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| 20080266248 | COORDINATE INFORMATION PROVIDING METHOD AND VIDEO APPARATUS THEREOF - A method for providing coordinate information to an external device and a video apparatus thereof. The coordinate information providing method includes receiving coordinate information input by a user from an input device; and transmitting a coordinate information delivery message containing the coordinate information input through the input device, to an external device connected according to a High Definition Multimedia Interface (HDMI) Consumer Electronics Control (CEC) specification. Accordingly, the video apparatus can control the external device by transferring the coordinate information to the external device. | 10-30-2008 |
| 20080266455 | INACTIVE INFORMATION PROVIDING METHOD AND VIDEO APPARATUS THEREOF - An inactive information providing method of a video apparatus includes, in an inactive mode, generating an inactive message which provides notification of the inactive mode; and transmitting the inactive message to an external device connected according to a High Definition Multimedia Interface (HDMI) Consumer Electronics Control (CEC) specification. | 10-30-2008 |
| 20080270636 | METHOD FOR MANAGING LOGICAL ADDRESS AND DEVICE THEREOF - An address management method and a device thereof are provided. The address management method includes determining by a device whether all logical addresses corresponding to a type of the device are currently being used by external devices; setting by the device a non-use logical address as a logical address of the device, if it is determined that one of the logical addresses is currently not in use; and setting by the device a predetermined logical address as a logical address of the device, if it is determined that all the logical addresses are currently being used. Therefore, logical addresses may be allocated to a device even if all logical addresses corresponding the type of the device are currently being used. | 10-30-2008 |
| 20080271073 | METHOD OF PROVIDING KEY CODE INFORMATION AND VIDEO DEVICE THEREOF - A method of providing key code information of an external device and a video device thereof are provided. The method of providing key code information includes transmitting a message for requesting supportable key code information of a connected external device, and receiving a response message regarding the supportable key code information from the external device in response to the request message. Accordingly, the video device can provide the key code information supported by the external device to a user. | 10-30-2008 |
| 20080281995 | ADDRESS MANAGEMENT METHOD AND VIDEO APPARATUS USING THE SAME - An address management method and a video apparatus using the same are provided. The address management method includes determining whether an external device is connected or not; when determining the connection to the external device, generating an invalidation message for invalidating an address; and transmitting the generated invalidation message to the external device. Accordingly, when the port connection is changed, the physical address can be correctly updated by invalidating the former physical address. | 11-13-2008 |
| 20080291324 | PACKET GENERATING METHOD IN WIRELESS HDMI CEC - A packet generating method in a wireless High Definition Multimedia Interface (HDMI) environment includes generating a packet which includes either AV data or control data in a payload and a field indicative of a packet type in a header according to a HDMI environment; and transmitting the generated packet. Accordingly, the AV data and the control data can be transceived over the single channel in the HDMI. | 11-27-2008 |
| 20090147137 | METHOD FOR PROVIDING INFORMATION ON TYPE OF IMAGE APPARATUS AND IMAGE APPARATUS ADOPTING THE SAME - A method for providing information on types of image apparatus being used and an image apparatus adopting the same are provided. The method for providing information on the types of image apparatus being used includes transmitting a request message to external devices inquiring whether or not the external device which is connected using a high definition multimedia interface consumer electronics control (HDMI CEC) standard is a device of a particular type, and receiving from the external devices a response message answering whether or not the external device is a device of the particular type, in response to the request message. Accordingly, information on the type of connected external devices is obtained, and a list of external devices or a menu of external devices is provided according to the obtained type to the user so that the user can use the image apparatus more conveniently. | 06-11-2009 |
