Novatek Microelectronics Corp.

Shun-Li Wang

Chun-Hung Chen

Chih-Chang Lai

Jyun-Sian Li

Ching-Ho Hung

Chun-Chieh Chang

Yi-Rong Ko

The finger print detection method includes: accessing a part of an input image to generate a checked image; setting a gray level range, wherein each of a gray level of the gray level rang is larger than a minimum gray level and smaller than a maximum gray level; obtaining a detected pixel number of the checked image corresponding to all of the gray levels within the gray level range; and, checking whether the detected pixel number is larger than a product value of a preset ratio and a total pixel number of the checked image or not to determine whether the checked image is a finger print or not.

Finger print detection apparatus and detection method thereof

A touch sensing method for a touch panel is provided. The touch sensing method includes following steps. First, a plurality of sensing values of a plurality of sensing points are received so as to calculate a plurality of sensing difference values according to the sensing values. Next, a touch threshold value is determined according to at least one (e.g., a maximum one) of the sensing difference values. Then, the sensing difference values are compared with the touch threshold value to determine the coordinates of the touched ones of the sensing points according to the comparison result.

Touch sensing method capable of dynamically adjusting tough threshold value

A multi-touch positioning method for a touch control device is disclosed. The touch control device includes a plurality of sensing channels, and each of the plurality of sensing channels is interlaced by a first sensing electrode and a second sensing electrode. The multi-touch positioning method includes retrieving a first touch sensing value and a second touch sensing value respectively corresponding to the first sensing electrode and the second sensing electrode, adding the first touch sensing value and the second touch sensing value to generate a sensing sum value, determining a touch sensing channel having a local maximum value according to the plurality of sensing sum values of the plurality of sensing channels, so as to define a touch point on the touch sensing channel, and calculating a coordinate of the touch point according to the touch sensing channel and its neighboring sensing channels.

Multi-touch positioning method

A detection method for a capacitive touch device is provided. The detection method includes steps of: driving an Mdriving line among an m driving lines of the capacitive touch device, wherein M is a natural number smaller than or equal to m and greater than 1; selecting a plurality of sensing lines among n sensing lines; obtaining a plurality of sensing values by detecting voltage changes at the selected sensing lines; determining whether to perform a noise reduction operation on the sensing values; if yes, calculating respective differences between the sensing values and a baseline value, and generating a noise correction value corresponding to the sensing values by performing a statistical computation on the differences; and correcting the differences according to the noise correction value.

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Hsinchu, Taiwan

Shun-Li Wang