Abstract:
A dimmer circuit and a lighting apparatus using the same are provided. The dimmer circuit comprises a dimmer, a rectifier, a sample-and-hold unit, an integral unit and a current holding circuit. The dimmer is coupled to an AC for modulating the AC into an alternating signal. The rectifier couples the dimmer and the AC for rectifying the alternating signal into a DC signal. The sample-and-hold unit is coupled to the rectifier for sampling the DC signal to obtain an average positive wave pulse. The integral unit is coupled to the sample-and-hold unit for integrating the average positive wave pulse to generate a DC voltage. The current holding circuit comprises a switch and a bleeder. The current holding circuit determines the on/off state of the switch according to a comparison between the DC voltage and a reference voltage, such that the DC signal passes through the bleeder or the switch.
Abstract:
A light device includes a light transmission tube, a heat sink, a light bar, and two end caps. The light transmission tube has two securing parts. Each of the securing parts includes a first rib and a second rib, and a guide-track groove is formed between the first and second ribs. The heat sink includes a first plate body and a second plate body. The first plate body is curved and abutted on an inner wall of the light transmission tube, and the second plate body is curved toward the first plate body. Two terminals of the first plate body are connected to two terminals of the second plate body to form two connecting parts for coupling with the guide-track grooves. The light bar is disposed on the second plate body. The end caps are respectively connected to two terminals of the light transmission tube.
Abstract:
A temperature and illumination adjusting system, including: a temperature and illumination adjusting device, including a CPU, receiving a temperature value and an illumination value, and generating a first PWM value and a second PWM value according to a first formula and a second formula; and a communication unit, outputting the first PWM value and the second PWM value; and a lamp device, including a lamp communication unit, receiving the first PWM value and the second PWM value; a first light module; a second light module; a first PWM driving unit, driving the first light module with the first PWM value; a second PWM driving unit, driving the second light module with the second PWM value, wherein the outputs of the first light module and the second light module have different color temperature.
Abstract:
The control method comprises the following steps. Firstly, whether a touch event occurs in a control device is determined. Then, responding to a color temperature set and a brightness set from the control device, a first PWM and a second PWM is generated. Then, whether the lamp connects with to the control device is determined. Then, the first PWM and the second PWM is packaged in a color control package if the lamp connects with to the control device. Then, the color control package is transmitted to the lamp in wireless.
Abstract:
An embodiment of the invention provides a lamp comprising a first emitting device, a second emitting device, and a control signal generation device. The control signal generation device generates a first control signal and a second control signal to control the first emitting device and the second emitting device, so that a first light flux generated by the first emitting device is equivalent to a second light flux generated by the second emitting device, wherein the second control signal is generated according to the first control signal.
Abstract:
A lamp includes a lamp tube, a carrier, a light bar circuit board, a driver circuit board, a plurality of first luminous elements and a parallel-connected type luminous unit. The carrier is accommodated in the lamp tube. The light bar circuit board is disposed on the carrier. The driver circuit board is disposed on the carrier and adjoins the light bar circuit board. The first luminous elements are disposed on the light bar circuit board. The parallel-connected type luminous unit is disposed on the driver circuit board, and includes a plurality of luminous element groups connected in parallel.
Abstract:
A lamp tube includes a light transmission tube, a heat dissipation structure, a die bonding substrate and at least one light source. The light transmission tube includes first guiding rails disposed on opposite positions of the inner wall thereof. The first guising rails and the inner wall of the light transmission tube form first grooves. The heat dissipation structure inserts into the light transmission tube, and includes a die bonding area, extending arms downwardly extended from opposite sides of the heat dissipation structure, and connecting arms connected to the extending arms. Each of the extending arms includes second guiding rails and second grooves. The second guiding rail is engaged with the first groove, and the first guiding rail is engaged with the second groove. The die bonding substrate is placed on the die bonding area. The light source is placed on the die bonding substrate.
Abstract:
The control method comprises the following steps. Firstly, whether a touch event occurs in a control device is determined. Then, responding to a color temperature set and a brightness set from the control device, a first PWM and a second PWM is generated. Then, whether the lamp connects with to the control device is determined. Then, the first PWM and the second PWM is packaged in a color control package if the lamp connects with to the control device. Then, the color control package is transmitted to the lamp in wireless.
Abstract:
A temperature and illumination adjusting system, including: a temperature and illumination adjusting device, including a CPU, receiving a temperature value and an illumination value, and generating a first PWM value and a second PWM value according to a first formula and a second formula; and a communication unit, outputting the first PWM value and the second PWM value; and a lamp device, including a lamp communication unit, receiving the first PWM value and the second PWM value; a first light module; a second light module; a first PWM driving unit, driving the first light module with the first PWM value; a second PWM driving unit, driving the second light module with the second PWM value, wherein the outputs of the first light module and the second light module have different color temperature.
Abstract:
The invention relates to a driving circuit comprising a first bridge circuit, a second bridge circuit, a first protection device and a second protection device. The first bridge circuit comprising a first positive input terminal, a first negative input terminal, a first positive output terminal and a first negative output terminal is coupled to an AC voltage source to output a first voltage. The second bridge circuit comprising a second positive input terminal, a second negative input terminal, a second positive output terminal and a second negative output terminal is coupled to the AC voltage source to output a second voltage. The second and the first negative output terminals are both coupled to the ground potential. The first protection device is coupled between the second positive input terminal and the AC voltage source. The second protection device is coupled between the second negative input terminal and the AC voltage source.