Abstract:
A light source driving apparatus including a voltage converting unit, a switching unit, a feedback unit and a control unit is provided. The voltage converting unit provides a driving current to drive a light source module. The switching unit is controlled to be conducted or not by a switch signal. The feedback unit detects a load status of the light source module, and provides a feedback signal accordingly. The control unit modulates pulse widths of the switch signal according to the feedback signal, a signal upper limitation, and a signal lower limitation, so as to control the switching unit to be conducted. The voltage converting unit includes an energy storage element. When the switching unit is conducted, the energy storage element stores a part of energy provided by the input power source. When the switching unit is not conducted, the energy storage element provides the driving current.
Abstract:
A light source driving apparatus including a voltage converting unit, a switching unit, a feedback unit and a control unit is provided. The voltage converting unit provides a driving current to drive a light source module. The switching unit is controlled to be conducted or not by a switch signal. The feedback unit detects a load status of the light source module, and provides a feedback signal accordingly. The control unit modulates pulse widths of the switch signal according to the feedback signal, a signal upper limitation, and a signal lower limitation, so as to control the switching unit to be conducted. The voltage converting unit includes an energy storage element. When the switching unit is conducted, the energy storage element stores a part of energy provided by the input power source. When the switching unit is not conducted, the energy storage element provides the driving current.
Abstract:
Image pickup systems capable of preventing blurred images are provided, in which a first sensor detects a variation in inclination of an image pickup device to generate a first sensing data, a second sensor detects a position movement from an image sensor in the image pickup device to generate a second sensing data and a driving unit is coupled to the image sensor. A processing module receives the first and second sensing data, integrates the first sensing data, calculates the integrated first sensing data and the second sensing data to obtain control information, and enables the driving unit to adjust the position of the image sensor according to the control information.
Abstract:
A backlight control apparatus for controlling a backlight device for a liquid crystal display (LCD), the backlight device including a plurality of light-emitting components, the backlight control apparatus including: a synchronization unit to provide a synchronization signal; an image processing module to receive a video image signal representing a video image, the image processing module being configured to divide the video image into a plurality of block areas and generate a plurality of pulse-width modulation (PWM) data signals each corresponding to one of the plurality of block areas; a control module coupled to the synchronization unit and the image processing module, the control module being configured to generate a plurality of PWM signals based on the plurality of PWM data signals and the synchronization signal; and a driving module coupled to the control module, the driving module being configured to drive the backlight device based on the plurality of PWM signals.
Abstract:
A light source driving apparatus to drive at least one light source module includes a switch unit for coupling in series with an AC power source and the light source module; a clock synchronization unit for coupling to the AC power source and to provide a clock synchronization signal in accordance with an AC voltage of the AC power source; a control unit coupled to receive the clock synchronization signal and to provide to the switch unit an adjusting signal according to a timing of the clock synchronization signal; and a feedback unit coupled to the control unit and to detect a load state of the light source module, the feedback unit configured to provide to the control unit a feedback signal having a value representative of the detected load state of the light source module. The control unit is configured to modulate a pulse width of the adjusting signal according to the feedback signal and a preset brightness value of the light source module, the switch unit responsive to the adjusting signal to open and close to apply the AC voltage to the light source module in accordance with the modulated pulse width.
Abstract:
Image pickup systems capable of preventing blurred images are provided, in which a first sensor detects a variation in inclination of an image pickup device to generate a first sensing data, a second sensor detects a position movement from an image sensor in the image pickup device to generate a second sensing data and a driving unit is coupled to the image sensor. A processing module receives the first and second sensing data, integrates the first sensing data, calculates the integrated first sensing data and the second sensing data to obtain control information, and enables the driving unit to adjust the position of the image sensor according to the control information.
Abstract:
Camera systems and methods with vibration compensation. The system comprises a first sensor, a second sensor, and a processing module. The first sensor detects an angle variation of a movement of a camera device to generate first sensed data. The second sensor detects a position movement of an image sensor of the camera device to generate second sensed data. The processing module takes the first derivative of the second sensed data, and calculates control information according to the first sensed data and the differential of the second sensed data. The processing module enables a drive device to adjust the position of the image sensor based on the control information.
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.