Abstract: A light source apparatus and a driving apparatus thereof are provided. The driving apparatus includes a first node, a second node, a clock synchronization unit, a control unit, a switch unit, and a feedback unit. The driving apparatus receives an AC voltage through the first and the second nodes. The clock synchronization unit converts the AC voltage into a clock synchronization signal. The control unit converts a preset brightness value into a driving current, outputs an adjusting signal according to a timing of the clock synchronization signal, and modulates a pulse width of the adjusting signal according a feedback signal. The switch unit determines whether or not the AC voltage is provided to the light source module according to a control of the adjusting signal. The feedback unit detects a load state of the light source module, and outputs the feedback signal to the control unit according a detection result.

Abstract: An illumination brightness and color control system and method therefor are provided. A broadband light source monitor senses and samples a point light source for a luminous intensity signal value. Then, a corrected current value is computed based on a difference between the luminous intensity signal value and a target brightness/color value, and a driving current generated by a light source driver to drive the point light source is adjusted according to the corrected current value.

Abstract: An illumination brightness and color control system for adjusting the illumination of a plurality of point light sources and method therefor are provided, implemented in a time division manner. A single photosensor senses and samples a point light source for the luminous intensity signal value. Then, the luminous intensity signal value at each wavelength and a target brightness/color value are compute to acquire a corrected current value, and the corrected current value is fed back to a light source driver. Therefore, the brightness/color value of the point light sources is adjusted to be in a steady state.

Abstract: An illumination brightness and color control system and method therefor are provided, implemented in a time division manner. A single photosensor senses and samples a point light source for the luminous intensity signal value. Then, the luminous intensity signal value at each wavelength and a target brightness/color value are computed to acquire a corrected current value, and the corrected current value is fed back to a light source driver. Therefore, the brightness/color value of the diode is adjusted to be in a steady state.

Abstract: Method and device for light signal reception. This device can selectively execute a comparison mode or a gain mode. In the device, a transmitter transmits a light beam to a target. A receiver receives the light beam reflected from the target and outputs a corresponding received signal. In the comparison mode, it is determined whether a pulse in the received signal is higher than a reference voltage level. When the pulse is higher the reference voltage level, the pulse is outputted. The gain mode is executed and the received signal is amplified and output when no pulse is higher than the reference voltage level in the received signal. The method and device of the present invention can be applied to range finders, the comparison mode is executed during short-distance measurement and the gain mode is executed during long-distance measurement thereby measuring the target distance from several meters to a thousand meters.

Abstract: A Rangefinder capable of long and short distance measurement in company with compass measurement. The rangefinder includes distance measurement unit, a compass sensing unit and a processor. The rangefinder can selectively execute a comparison mode or a gain mode. The comparison mode is executed during short-distance measurement and the gain mode is executed during long-distance measurement. The compass measurement unit senses a terrestrial magnetism to obtain first and second magnetic sensing signals. The processor estimates a distance between the target and the rangefinder according to the measurement signal from the distance measurement unit and determines a compass orientation of the target according to the first and second magnetic sensing signals.

Abstract: A Rangefinder capable of long and short distance measurement in company with compass measurement. The rangefinder includes distance measurement unit, a compass sensing unit and a processor. The rangefinder can selectively execute a comparison mode or a gain mode. The comparison mode is executed during short-distance measurement and the gain mode is executed during long-distance measurement. The compass measurement unit senses a terrestrial magnetism to obtain first and second magnetic sensing signals. The processor estimates a distance between the target and the rangefinder according to the measurement signal from the distance measurement unit and determines a compass orientation of the target according to the first and second magnetic sensing signals.

Abstract: Method and device for light signal reception. This device can selectively execute a comparison mode or a gain mode. In the device, a transmitter transmits a light beam to a target. A receiver receives the light beam reflected from the target and outputs a corresponding received signal. In the comparison mode, it is determined whether a pulse in the received signal is higher than a reference voltage level. When the pulse is higher the reference voltage level, the pulse is outputted. The gain mode is executed and the received signal is amplified and output when no pulse is higher than the reference voltage level in the received signal. The method and device of the present invention can be applied to range finders, the comparison mode is executed during short-distance measurement and the gain mode is executed during long-distance measurement thereby measuring the target distance from several meters to a thousand meters.

Abstract: A camera for measuring the distance to an object is combined with a laser range measuring device by using a beam splitting device so as to simultaneously take the image of the object and measure the distance between the camera and the object. Using the focal length of the lens, the width and height of the image on the image detector, and the distance between the camera and the object, it is then possible to compute the width and height of the object according to the geometrical optics. By means of obtaining the speed of the image moving on the image detector, the camera of the invention further computes the speed of the object which is projected on a plane perpendicular to the optical axis of the lens.

Abstract: A method and an apparatus for locating an object by using a laser range finder are disclosed, and more particularly relates to a method and an apparatus that can increase distance and accuracy of measuring object without increasing laser emitting power. Since noise is existent randomly, through the statistics theorem, it is known that an accurate distance between the laser range finder and the measured object can be measured and obtained by repeatedly performing measurements and accumulatively adding the result obtained from each measurement. Hence, by utilizing the present invention, an accurate distance between the laser range finder and the measured object can be measured without increasing the emitting laser power, and even if the measurement is performed under a noisy situation.

Abstract: A light receiving circuit of a laser range finder comprises a photo-sensitive element, a conversion resistance amplifying loop, a main amplification loop, and a one shot circuit. The photo-sensitive element converts a light signal into a current signal. The conversion resistance amplifying loop is connected with the photo-sensitive element for converting the current signal into a voltage signal. The main amplification loop is connected with the conversion resistance amplifying loop for amplifying the voltage signal. The one shot loop is connected with the main amplification loop for shaping the voltage signal into a digital signal by which the range-finding computation is accomplished by the laser range finder.

Abstract: A high precision laser range finder comprises an APC loop for eliminating a timing jitter problem due to different reflections on a target. The APC loop comprises a laser receiver, a peak holding circuit, an integrator and a high voltage generator. The peak holding circuit is connected with the laser receiver for detecting a signal strength outputted from the laser receiver. The high voltage generator provides the laser driver and laser receiver with voltage so as to control the strength of the emitted laser pulse signal of the laser driver and the gain of the avalanche photo-detector. The integrator is used to eliminate the steady error in the APC loop. Furthermore, a time to amplitude converting circuit comprises an AJD converter for obtaining a distance data and then filtering in a microprocessor to increase the measurement accuracy.

Abstract: A high precision laser range finder comprises an APC loop for eliminating a timing jitter problem due to different reflections on a target. The APC loop comprises a laser receiver, a peak holding circuit, an integrator and a high voltage generator. The peak holding circuit is connected with the laser receiver for detecting a signal strength outputted from the laser receiver. The high voltage generator provides the laser driver and laser receiver with voltage so as to control the strength of the emitted laser pulse signal of the laser driver and the gain of the avalanche photo-detector. The integrator is used to eliminate the steady error in the APC loop. Furthermore, a time to amplitude converting circuit comprises an A/D converter for obtaining a distance data and then filtering in a microprocessor to increase the measurement accuracy.