Abstract: A LED driving device is provided. The LED driving device includes a multi-segment linear LED driver, first current-compensating device and second current-compensating device. The LED driving device is used to drive a LED device which is composed by a plurality of serial LED modules. The multi-segment linear LED driver selectively provides a first path to a first LED module of the LED modules for flowing a first constant current, or provides a second path to the first LED module and a second LED module of the LED modules for flowing a second constant current. When the first path is provided, first compensating current flows through the first current-compensating device. When the second path is provided, the first current-compensating device stops conducting the first compensating current. When the second path is provided, second compensating current flows through the second current-compensating device.

Abstract: A LED driving device is provided. The LED driving device includes a multi-segment linear LED driver, first current-compensating device and second current-compensating device. The LED driving device is used to drive a LED device which is composed by a plurality of serial LED modules. The multi-segment linear LED driver selectively provides a first path to a first LED module of the LED modules for flowing a first constant current, or provides a second path to the first LED module and a second LED module of the LED modules for flowing a second constant current. When the first path is provided, first compensating current flows through the first current-compensating device. When the second path is provided, the first current-compensating device stops conducting the first compensating current. When the second path is provided, second compensating current flows through the second current-compensating device.

Abstract: A lamp and an illumination system and a driving method thereof are provided. The lamp includes a lighting unit, a conversion unit, and a driver. The conversion unit is capable of receiving an input pulse width modulation (PWM) signal and converting the input PWM signal into an output PWM signal, wherein a frequency of the input PWM signal and a frequency of the output PWM signal are different. The driver is coupled between the lighting unit and the conversion unit. The driver is capable of receiving the output PWM signal and generating a driving signal to drive the lighting unit according to the output PWM signal.

Abstract: A light source control method and a light source control device are used for controlling a light source. The light source control device includes a position detecting sensor and a microcontroller. The light source control method includes steps of generating a first signal according to an object touching a position of the position detecting sensor, and generating a control signal according to a light source adjustable parameter set corresponding to the first signal for controlling an illuminating status of the light source. The light source adjustable parameter set includes a plurality of color value components. The control signal is generated by the microcontroller according to the color value components.

Abstract: An illumination system including a master control unit, a device unit, a driving circuit unit, and an illumination unit is provided. The master control unit receives an input signal and outputs a control signal by performing a program operation processing to the input signal. The device unit analyzes the control signal so as to obtain a color temperature setting value and a brightness setting value, and generates two output signals according to the brightness setting value and two color temperature adjusting signals determined by the color temperature setting value. The illumination unit has at least two lamps with different color temperatures. The driving circuit unit receives and converts the two output signals so as to proportionally output two driving signals to respectively drive the two lamps. One of the two output signals is enabled after the other of the two output signals is disabled for a predetermined time.

Abstract: A lamp and an illumination system and a driving method thereof are provided. The lamp includes a lighting unit, a conversion unit, and a driver. The conversion unit is capable of receiving an input pulse width modulation (PWM) signal and converting the input PWM signal into an output PWM signal, wherein a frequency of the input PWM signal and a frequency of the output PWM signal are different. The driver is coupled between the lighting unit and the conversion unit. The driver is capable of receiving the output PWM signal and generating a driving signal to drive the lighting unit according to the output PWM signal.

Abstract: A light source apparatus includes a light guide plate, light scattering micro-structures, at least a light-emitting module, and a front cover. The light guide plate has a first surface, a second surface opposite thereto, at least a light incident surface connecting the first and the second surfaces, a scattering area, and a reflecting area surrounding the scattering area. The light scattering micro-structures are disposed on at least one of the first and the second surfaces and within the scattering area. The light-emitting module is disposed beside the light incident surface and capable of emitting a light beam entering the light guide plate through the light incident surface. The front cover covers the reflecting area and has a light emerging area opposite to the scattering area. The light emerging area capable of being passed through by the light beam has a shape similar to a shape of the scattering area.

Abstract: An illumination system including a master control unit, a device unit, a driving circuit unit, and an illumination unit is provided. The master control unit receives an input signal and outputs a control signal by performing a program operation processing to the input signal. The device unit analyzes the control signal so as to obtain a color temperature setting value and a brightness setting value, and generates two output signals according to the brightness setting value and two color temperature adjusting signals determined by the color temperature setting value. The illumination unit has at least two lamps with different color temperatures. The driving circuit unit receives and converts the two output signals so as to proportionally output two driving signals to respectively drive the two lamps. One of the two output signals is enabled after the other of the two output signals is disabled for a predetermined time.

Abstract: A light source control method and a light source control device are used for controlling a light source. The light source control device includes a position detecting sensor and a microcontroller. The light source control method includes steps of generating a first signal according to an object touching a position of the position detecting sensor, and generating a control signal according to a light source adjustable parameter set corresponding to the first signal for controlling an illuminating status of the light source. The light source adjustable parameter set includes a plurality of color value components. The control signal is generated by the microcontroller according to the color value components.

Abstract: A light source driving circuit for a backlight module is disclosed, wherein each driving unit includes a reference resistor, a transistor, a bias resistor and a shunt regulator. The transistor is coupled between an LED string and the reference resistor, and the bias resistor is coupled between an operation voltage and the control terminal of the transistor. The shunt regulator is coupled between the control terminal of the transistor and a common terminal, and the reference pin of the shunt regulator is coupled to the common node between the reference resistor and the transistor.