Novatek Microelectronics Corp.

Hsing-Chien Yang

Tsung-Hau Chang

Wen-Hsin Cheng

Lan-Ting Hsu

Ying-Hao Hsu

Jin-Ming Chen

Lucian-Yuan

A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.

LED device, LED driving circuit and method

A display controller driver and a testing method thereof are provided. The display controller driver includes an image data memory, a timing control circuit, and a data line driving circuit. The image data memory stores display data. The timing control circuit obtains the display data from the image data memory. The data line driving circuit is coupled to the timing control circuit. The data line driving circuit receives the display data and outputs a grayscale voltage signal corresponding to the display data through at least one data-line output terminal of the display controller driver. In a test operation mode, the timing control circuit further transmits the display data from the image data memory to at least one test output port of the display controller driver.

Display controller driver and testing method thereof

A controller driver for driving a display panel is provided. The controller driver comprises a timing control circuit, a data memory unit, a data selection unit and a data line driver circuit. The data memory unit stores image data. The data selection unit coupled to the data memory unit outputs the image data provided from the data memory unit as a display data, or generates the display data in accordance with a command or test patterns provided from an external processor. The data line driver circuit is coupled to the timing control circuit and the data selection unit. The data line driver circuit receives the display data from the data selection unit, and outputs corresponding grayscale voltages according to the control signal outputted from the timing control circuit.

Controller driver for driving display panel

A circuit for computing sums of absolute difference (SAD) is provided. The circuit has an absolute difference circuit, a first adder, a first register and a first selective circuit. The absolute difference circuit receives a first data PMand a second data PSand output a absolute difference data AD, wherein AD=|PM&#x2212;PS|. The first adder receives and adds the absolute difference data and a first accumulative data, and outputs a first sum. The register receives and locks the first sum according to a first preset timing sequence, and outputs a first sum of absolute difference data. The first selective circuit receives and selects the first sum of absolute difference data or 0, and outputs the selected data as the first accumulative data.

Circuit for computing sums of absolute difference

A motion estimation circuit and a motion estimation processing element are provided. The latch module in the motion estimation circuit has n pieces of m-stage shift registers. Each shift register receives a current block data and transmits the received current block data to next stage according to a timing. The processing module has a plurality of processing elements (PEs), which are divided into (m+1) groups. The PEs of the i-th group receive the left search window data and the right search window data and are coupled to the input ends and the output ends of the i-th stage of latches, wherein 0&#x3c;i&#x2266;m. Each PE compares the similarity degree between the corresponding candidate block in the search window and the current block and outputs the processed result, respectively. The comparing unit receives and compares the processed results for outputting a first comparison result.

Motion estimation circuit and motion estimation processing element

The present invention provides a motion estimation circuit and an operating method thereof. The motion estimation circuit includes processing elements PE(&#x2212;n&#x2266;m&#x2266;n, n represents a search range), data latches FF(&#x2212;n&#x3c;k&#x2266;n) and selection circuits MUX(&#x2212;1&#x2266;h&#x2266;1). The processing element receives a current block data and the corresponded block data in a search window and performs a comparison operation on the two block data. The output-end of FFis coupled to an input-end of FFand a first input-end of PE. The output-end of MUXis coupled to a second input-end of PE. Wherein, each 4&#xd7;4-pixel sub block of the current block is input into PEand FF, the left sector of the sub-search-window SW' is input into the second input-ends of PE&#x2dc;PEand the first input-end of MUX, and the right sector of the sub-search-window SW&#x2032; is input into the second input-ends of PE&#x2dc;PEand MUX.

Growing community of inventors

Hsinchu County, Taiwan

Hsing-Chien Yang