Pixart Imaging Incorporated

Chao Chien Huang

Hsin Chia Chen

Meng Tsung Wu

Chih Hsin Lin

En Feng Hsu

Cho Yi Lin

Tzu Yi Chao

Chih Hung Lu

Yi Fang Lee

Chang Che Tsai

Ming Tsan Kao

Cheng Kuang Sun

Shih Chi Chien

Hsuan Hsien Lee

An interactive pointing device capable of switching capture ranges includes an image capturing element and a processing unit. The image capturing element operates in a first capture range or a second capture range. The image capturing element is used for capturing a light source, and outputting an image signal. When a distance from the interactive pointing device to the light source is smaller than a reference value, the processing unit controls the image capturing element to detect the light source with the first capture range, and the processing unit converts the image signal into a first coordinate data. When the distance is greater than the reference value, the processing unit controls the image capturing element to detect the light source with the second capture range, and the processing unit converts the image signal into a second coordinate data.

Interactive pointing device capable of switching capture ranges and method for switching capture ranges for use in interactive pointing device

An interactive pointing device capable of switching capture ranges includes an image capturing element and a processing unit. The image capturing element is used for capturing an optical signal, and outputting an image signal. The processing unit is used for determining a switching signal, and responsible for processing and analyzing the image signal. Through the determination about the switching signal and the coordinate conversion of the image signal by an arithmetic unit, the interactive pointing device capable of switching capture ranges is enabled to be operable in hosts with different resolutions.

Interactive pointing device capable of switching capture ranges and method for switching capture ranges

A control device for an image display includes at least two reference points, a modulation unit and a remote controller. The modulation unit modulates the light of a predetermined spectrum generated by the reference points with a brightness variation cycle. The modulation unit controls the reference points to emit the light with a first brightness within a first period of the brightness variation cycle and to emit the light with a second brightness within a second period of the brightness variation cycle, wherein the first brightness and the second brightness are not zero gray level. The remote controller captures the light of the predetermined spectrum with a sampling cycle and demodulates an image variation of the reference points with respect to the remote controller. The present invention further provides a control method for an image display.

Control device and control method for image display

A cursor control method for controlling a cursor on an image display includes: providing at least two reference points for generating light of a predetermined spectrum and defining a predetermined area; providing an image sensor pointing inside the predetermined area; receiving the light of the predetermined spectrum by the image sensor to form a digital image; identifying positions and shapes of the images of the reference points on the digital image to form a first parameter; performing distance and angle compensations on the first parameter; moving the aiming point of the image sensor inside the predetermined area to form a second parameter; and calculating an displacement of the images of the reference points on the digital image according to the compensated first and second parameters so as to accordingly control the cursor. The present invention further provides a cursor control apparatus.

Cursor control method and apparatus

A pointer positioning device for positioning an aiming point on a display screen of an image display comprises at least one auxiliary point, an image sensor and an optical filter. The auxiliary point is disposed at the peripheral of the display screen for generating a predetermined spectrum. The image sensor receives signals of the predetermined spectrum generated by the auxiliary point. The optical filter is disposed in front of the image sensor for filtering out spectrum outside the predetermined spectrum such that the image sensor can merely sense the signals of the predetermined spectrum, wherein the auxiliary point is utilized as a reference point for correcting an initial setup and positioning the aiming point so as to position the aiming point inside a predetermined range on the display screen. The present invention also provides a pointer positioning method adapted to the pointer positioning device.

Pointer positioning device and method

A remote controller for controlling a display device includes a first image sensor, a processing unit and an activation mechanism. The first image sensor is for sensing an object and forming a digital image. The processing unit is coupled to the first image sensor for calculating image variations of the object on the digital image, correspondingly controlling the display device according to the image variations and deactivating the first image sensor after the remote controller is idle for a predetermined period of time. The activation mechanism is coupled to the first image sensor for re-activating the deactivated first image sensor.

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Hsin-Chu, Taiwan

Chao Chien Huang