摘要:
An light emitting diode (LED) control, a plurality of duty cycle signals corresponding to a plurality of LEDs are stored in a dual-port memory by memory mapping. By sampling, the stored duty cycle signals are outputted to generate a plurality of parallel single-bit data each having one single bit. After the single-bit data are converted by a data transmission module, each bit of the single-bit data is serially outputted to a drive module to drive the LEDs. Thus, the ON duty cycles of the LEDs are modulated by pulse width modulation (PWM), light emitted from the LEDs are mixed in time-domain, and the brightness of the LEDs can be controlled.
摘要:
In light emitting diode (LED) control, a plurality of duty cycle signals corresponding to a plurality of LEDs are stored in a dual-port memory by memory mapping. By sampling, the stored duty cycle signals are outputted to generate a plurality of parallel single-bit data each having one single bit. After the single-bit data are converted by a data transmission module, each bit of the single-bit data is serially outputted to a drive module to drive the LEDs. Thus, the ON duty cycles of the LEDs are modulated by pulse width modulation (PWM), light emitted from the LEDs are mixed in time-domain, and the brightness of the LEDs can be controlled.
摘要:
A DC-AC converter is provided. The DC-AC converter includes a time-varying DC power generating circuit, an AC power generating circuit and a transmission capacitor. The time-varying DC power generating circuit is controlled by a pulse width modulation (PWM) signal to transform a DC source into a time-varying DC power. With reference to the time-varying DC power, the AC power generating circuit is controlled by a first polarity switching and a second polarity switching signal to generate an AC power. The transmission capacitor, coupled to the time-varying DC power generating circuit and the AC power generating circuit, transmits the time-varying DC power from the time-varying DC generating circuit to the AC power generating circuit.
摘要:
A DC-AC converter is provided. The DC-AC converter includes a time-varying DC power generating circuit, an AC power generating circuit and a transmission capacitor. The time-varying DC power generating circuit is controlled by a pulse width modulation (PWM) signal to transform a DC source into a time-varying DC power. With reference to the time-varying DC power, the AC power generating circuit is controlled by a first polarity switching and a second polarity switching signal to generate an AC power. The transmission capacitor, coupled to the time-varying DC power generating circuit and the AC power generating circuit, transmits the time-varying DC power from the time-varying DC generating circuit to the AC power generating circuit.
摘要:
The present invention relates to a solar-powered wireless communication module with daylight intensity measurement, which comprises: a solar cell module, capable of converting solar energy into electricity; a Microcontroller Unit (MCU), coupled to the solar cell module for detecting and outputting values regarding the voltage and the current of the electricity converted from the solar cell module; and a wireless communication unit, powered by the electricity from the solar cell module and coupled to the MCU for transmitting values outputted from the MCU to a control end.
摘要:
A light source mixture control device for controlling a light source emitting different spectrums is provided. A coordination conversion unit receives and converts a hue signal and a luminance signal into a first to a third undecoupled color light component. A first color light component decoupling control unit decouples a first color light component from the first to the third undecoupled color light component. A second color light component decoupling control unit decouples the first undecoupled color light component into a first decoupled color light component. A third color light component decoupling control unit decouples the second undecoupled color light component into a second decoupled color light component. A fourth color light component decoupling control unit decouples the third undecoupled color light component into a third decoupled color light component. The first to the third decoupled color light component respectively control the light source.
摘要:
A light source mixture control device for controlling a light source emitting different spectrums is provided. A coordination conversion unit receives and converts a hue signal and a luminance signal into a first to a third undecoupled color light component. A first color light component decoupling control unit decouples a first color light component from the first to the third undecoupled color light component. A second color light component decoupling control unit decouples the first undecoupled color light component into a first decoupled color light component. A third color light component decoupling control unit decouples the second undecoupled color light component into a second decoupled color light component. A fourth color light component decoupling control unit decouples the third undecoupled color light component into a third decoupled color light component. The first to the third decoupled color light component respectively control the light source.
摘要:
The present invention relates to a solar-powered wireless communication module with daylight intensity measurement, which comprises: a solar cell module, capable of converting solar energy into electricity; a Microcontroller Unit (MCU), coupled to the solar cell module for detecting and outputting values regarding the voltage and the current of the electricity converted from the solar cell module; and a wireless communication unit, powered by the electricity from the solar cell module and coupled to the MCU for transmitting values outputted from the MCU to a control end.
摘要:
A non-isolated AC/DC converter having power factor correction, comprising an active switch connected to a waveform controller for control, and sequentially showing conduction, cut off, making the alternating current power supply pass through one circuit rectifier for rectifying and forming one positive half sine wave electricity supply, which passes through a voltage step-down circuit to proceed with decreasing the voltage, then passing through a filter/storage circuit for filtering and forming direct current power supply, which is stored on this filter/storage circuit, then releasing the energy and supplying electricity to the electricity end; as a transformer isn't required, the circuit volume can be reduced, lowering costs, raising circuit conversion rates and achieving power factor correction and increasing the lifespan of the transformer, moreover, through the waveform controller controlling the output waveform, the storage circuit utilizes a lower capacity capacitor to avoid using an electrolytic capacitor, thereby increasing the circuits lifespan.
摘要:
A two-stage isolated DC/AC conversion circuit structure, consisting of a main switch, a second switch attached to a controller, another controller for controlling, and in work mode 1 and 2, after passing through the capacitor filter the low frequency half sine wave power is stored on this capacitor. After an inductor outputs the low frequency half sine wave power through this capacitor filter, it can respectively pass through the first and second transformers to increase the voltage, and then pass through the first and second secondary diode rectifiers, outputting the positive and negative half waves AC to the end user, and allow the end user to obtain the whole wave of the AC. Using the first and second diodes prevents outputting in reverse, and has the effect of isolation, and prevents all the stored energy for the later stage end user recharging to the front stage DC/AC conversion circuit.