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Keng-Chih
Keng-Chih Chen, Taipei City TW
| Patent application number | Description | Published |
|---|---|---|
| 20090276638 | POWER CONTROL DEVICE AND POWER CONTROL METHOD APPLIED TO COMPUTER SYSTEM - The present invention provides a power control device and a power control method applied to a computer system. The power control device includes a data processing unit, a throughput determining module, and a clock control unit. The data processing unit is utilized for processing and outputting data according to an adjustable clock rate. The throughput determining module is coupled to the data processing unit, and utilized for obtaining an indication value corresponding to a data output rate of the data processing unit and comparing the indication value with at least a predetermined threshold value to generate a comparing result. The clock control unit is coupled between the throughput determining module and the data processing unit, and utilized for adjusting the adjustable clock rate of the data processing unit according to the comparing result. | 11-05-2009 |
Keng-Chih Kuo, Pingtung County TW
| Patent application number | Description | Published |
|---|---|---|
| 20080204293 | MULTI-CHANNEL DISPLAY DRIVER CIRCUIT INCORPORATING MODIFIED D/A CONVERTERS - A multi-channel display driver circuit incorporating modified D/A converters has a plurality of digital comparators connected to a number generator. Each digital comparator has an output, a digital data input and a reference input. The reference inputs of all digital comparators are connected to the number generator and the outputs are respectively connected to corresponding data channels of a display. By the proposed technique, each digital comparator obtains a unique non-sequence reference signal, and then compares it with the input digital data signal. Since the non-sequential signals are input to the reference input of the digital comparator, the overshoot distortion, the harmonic distortion and the electromagnetic interference problems are prevented. Therefore, the precise imaging can be obtained with this signal modulation technique in small circuit size. | 08-28-2008 |
Keng-Chih Lin, Taipei City TW
| Patent application number | Description | Published |
|---|---|---|
| 20110001574 | BALUN - A balun is provided. The balun includes a first substrate, a feed conductor, a second substrate, a first ground layer, a second ground layer and a common ground element. The feed conductor includes a feed portion and an extended feed portion. The feed conductor is disposed on the first substrate. The first ground layer is disposed on the second substrate corresponding to the feed portion. The second ground layer is disposed on the second substrate corresponding to the extended feed portion. A gap is formed between the first and second ground layers. The common ground element is disposed on the second substrate. The common ground element is electrically connected to the first and second ground layers. The common ground element includes a first common ground portion parallel and corresponding to the feed conductor. | 01-06-2011 |
Keng-Chih Lin, Taipei TW
| Patent application number | Description | Published |
|---|---|---|
| 20100045535 | FLAT ANTENNA DEVICE - A flat antenna device is proposed, including a substrate having a first surface and a second surface, a first. antenna module disposed on the first surface and having a first coupling unit, and a second antenna module disposed on the second surface and having a second coupling unit. The first and second coupling units are parallel and coupled to one another so as to constitute a transmission line structure, allowing signals passing through the first coupling unit to be coupled and fed into the second coupling unit such that a first resonant signal and a second resonant signal of approximately 910 MHz and 1710 MHz are generated through the transmission line structure and a hook-shaped radiation unit of the second antenna module and a third resonant signal of approximately 2400 MHz is generated through an open electromagnetic coupling groove formed in the second module, thereby providing a compact and low-cost flat antenna device for use with six commonly used frequency bands of GSM, GPS, DCS, PCS, UMTS and WLAN IEEE-802.11b/g/n. | 02-25-2010 |
Keng-Chih Liu, Taipei City TW
| Patent application number | Description | Published |
|---|---|---|
| 20110051030 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device installed in a panel having an accommodating cavity is provided. The liquid crystal display device includes a display screen, two sliding supporters and an actuator. The display screen has a display surface parallel to the panel. The two sliding supporters connect the display screen. The actuator is disposed on a frame accommodated in the accommodating cavity to drive the two sliding supporters and the display screen moving away from the panel horizontally from a horizontal position to a destination position. | 03-03-2011 |