LED Color Temperature Control

An upper and lower light fixture with independent color temperature and brightness ratio adjustment that allows more precise and flexible lighting control compared to existing solutions. The fixture has separate power supplies and control for the upper and lower lights. A microcontroller adjusts the current output from four-channel DC-DC converters to independently set the color temperature. This enables accurate color adjustment with low deviation. The upper and lower brightness ratio is changed by adjusting the output currents from the converters. The fixture has separate upper and lower light panels, diffusers, and brackets. A dial switch on top adjusts the upper light.

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Color adjustment control circuit for LED lighting that enables precise and independent color temperature adjustment of multiple LED channels while maintaining consistent brightness and power efficiency. The circuit uses a central control module to independently regulate the duty cycle of pulse signals driving each LED channel. This allows adjusting the color temperature of individual LEDs without impacting other channels. The central module also regulates voltage and current sharing. The circuit connects to AC power, converts it, and provides controlled pulse signals to drive the LED channels.

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LED lamp with adjustable color temperature that allows users to change the color temperature of the emitted light. The lamp has a detachable LED driver module that can be connected and disconnected from the lamp housing. The lamp also has a physical color temperature adjustment button on the module. Pressing the button cycles through predefined color temperature settings. The lamp uses a microcontroller to switch between adjustment circuits with different current ratios based on the button inputs. This provides multiple color temperature options without needing a separate control. The detachable module allows easy replacement and wireless remote control options.

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LED light adjustment module capable of independently controlling color temperature and power without disassembly. The module has separate circuits for adjusting color temperature and power. A rectifier filter connects to a boost constant current circuit. A control module adjusts the boost current and sends a signal to a color temperature module. Magnets near specific locations on the lamp trigger the color and power adjustments without disassembling the lamp.

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An external LED lamp control module that allows flexible connection and stepless color temperature adjustment. The module has a main control unit with interfaces to connect to an external LED lamp. The first interface has power terminals and at least two color temperature control terminals. The module sends separate color temperature signals to different lamp groups in the external LED lamp. It adjusts the signal frequencies/duty cycles to achieve desired overall color temperature. This enables independent and continuous color temperature control of multiple lamp groups in the external LED lamp.

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LED lighting device for plant growth that allows customization of the spectrum and color temperature of the light emitted to meet the growth requirements of different plants. The device has switches to adjust the white light color temperature and red/blue light ratio. A controller receives the switch signals and generates a control signal to the LED driver. This allows users to fine-tune the light spectrum and color temperature without needing multiple lights for different plants.

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LED lighting device that can adjust color temperature while dimming without causing discomfort. The device uses multiple types of LEDs with different color temperatures. When dimming, the dimming steps are shorter at lower brightness levels and longer at higher brightness levels. This prevents the perception that brightness increases faster than expected when dimming.

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A lamp with adjustable color temperature and lighting modes to provide customizable lighting options. The lamp has separate high and low color temperature light strings, a body sensor, brightness sensor, selector switch, power supply, and a module to connect and adjust the light strings for color temperature changes. The lamp can selectively turn on the high or low color temperature lights based on sensor inputs, or maintain low brightness and transition to high brightness when a person is detected. This allows adjusting the color temperature and brightness levels separately.

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Tunable white light LED device that provides high quality light with adjustable color temperature and enhanced color rendering for applications like circadian lighting. It uses a combination of three LED strings (blue LEDs with phosphor coatings), each with a different color phosphor, to generate unsaturated light of different colors. These unsaturated light spectra are mixed to create a tunable white light that can be adjusted along the black body locus of correlated color temperatures. The device uses a drive circuit to adjust the relative currents to the LED strings and achieve the desired color point.

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LED lighting system that allows dimming while maintaining consistent color temperature. The system uses multiple LED channels with different color temperatures. During dimming, it selectively combines adjacent channels to generate mixed light. This allows following the blackbody locus and expressing a wide range of color temperatures while dimming. The channel brightness decreases together with color temperature. The ratio of max brightness for each channel versus the highest channel decreases.

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A simplified circuit for adjusting color temperature of LED lights that allows simultaneous adjustment of both warm and cold light components. The circuit has two input channels, one for warm light and one for cold light, and a common output channel. The warm and cold channels each have a dimmer circuit to adjust the intensity of their respective colors. The common output channel has a combiner circuit that mixes the adjusted warm and cold signals to produce the final adjusted color temperature. This allows simultaneous adjustment of both warm and cold light components without needing separate adjustment of color temperature.

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Variable color temperature work position lamp for industrial applications like factories and workshops that allows adjustable color temperature to simulate daylight and reduce eye strain during extended shifts. The lamp has a control module connected to a voltage regulator, power supply, driving module, color temperature switching module, LED lamp group, storage module, processing module, and communication module. This allows remote control and customization of the color temperature conversion in the LED lamp group.

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LED lamp power supply with fine adjustment of brightness and color temperature. The supply uses a three-stage dimming and color adjustment circuit. The first stage converts mains to 50V DC. The second stage step-downs to a high-resolution current level using PWM dimming. The third stage divides the current to drive two LEDs of different color temperatures. MCU controls pulse widths to adjust brightness and ratio of the LEDs.

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An external LED lamp control module that allows flexible connection and precise color temperature adjustment compared to integrated solutions. The module has separate terminals for power, switch, color temperature control, and optionally Bluetooth and IR communication. It enables independent control of color temperature groups in an LED lamp using PWM signals. The module can also have sensors for human presence, ambient light, and power. This allows features like dimming, motion sensing, and color temperature adjustment based on ambient light. The external module can connect to LED lamps via standard sockets, simplifying replacement and upgrades compared to integrated modules.

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Flexible color temperature control in LED lighting through manual adjustment. The lighting apparatus has separate first and second LED light sources with adjustable color temperatures. A driver connects them and includes a manual switch for selecting from multiple options. This allows the user to mix the outputs of the two LED sources to fine-tune the overall color temperature.

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Adjustable color temperature, brightness and luminous surface LED control module. The module has circuits for adjusting brightness, color temperature, and light-emitting surface of LEDs using a microcontroller and switches. The brightness adjustment circuit regulates the dimming current to the LED power supply. The color temperature toggle switches send feedback to the microcontroller, which changes the duty cycles of the color temperature pins to adjust the color. The light-emitting surface switch sends feedback to the microcontroller, which adjusts the driving waveform for the LEDs.

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A device to allow changing color temperature of an LED lamp in both full-on and dimmed states without replacing the lamp itself. The device connects to the lamp and mains power. It has a power supply, processor, and control circuit. The processor receives signals from a remote, switch, or pull cord. It generates signals to control the lamp full-on and color temperature. The control circuit sends full-on and color temperature change signals to the lamp driver. The full-on signal is a sine wave like mains power. The color temperature change signal has alternating half cycles. This allows adjusting lamp color temp while lit by modulating the half cycles.

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LED lamp and lighting system with adjustable color temperature that allows consistent color temperature across multiple lamps connected in parallel. The lamp has a switch to adjust color temperature. If the switch is turned off and then on again quickly, it jumps to the next color temperature state. But if the switch was previously turned on for a certain threshold time, it keeps the current color temperature when turned on again to avoid flickering between lamps. This prevents color temperature inconsistency when connecting multiple lamps in parallel.

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Controlling the color temperature and brightness of LED lights using a single rectangular wave signal. The control method involves connecting a power switch, inverter, and PWM generator in separate color and dimming units. The PWM signal from the control unit is sent to both units. By varying the duty cycle of the rectangular wave, it simultaneously adjusts the on time of two LEDs with different color temperatures to change the color. Varying the PWM cycle time increases brightness. The dimming unit uses a monostable trigger to control start/end times.

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Light emitting diode (LED) device that can provide various light spectra and color temperatures. The LED has two separately controllable light-emitting elements. One element emits high color temperature white light and the other emits low color temperature white light. The elements use different phosphors to create a range of colors. The device can adjust the balance of the two elements to produce different white light spectra and color temperatures.

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