Light-emitting diode (LED) color temperature adjusting and controlling device and LED color temperature continuous adjustable control method

Abstract

The invention discloses a light-emitting diode (LED) color temperature adjusting and controlling device. The device comprises an adjustor and a driver, wherein the adjustor comprises a color temperature adjusting and controlling panel and a control signal generator; the color temperature adjusting and controlling panel is used for connecting and disconnecting a power supply and for an operator to send a color temperature adjusting and controlling signal; after receiving the color temperature adjusting and controlling signal sent by the color temperature adjusting and controlling panel, the control signal generator outputs a corresponding control signal according to an instruction; the driver comprises a microprocessor and a constant current driving module; the microprocessor receives the control signal from the control signal generator, analyzes and calculates the control signal and sends a pulse-width modulation (PWM) adjusting signal which changes the LED working current; and the constant current driving module outputs constant LED working current according to the PWM adjusting signal provided by the microprocessor. The output current of a control device is changed in a manual form, so that the color temperature and the brightness of the LED connected with the control device are adjusted.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to an LED color temperature control device and a control method for continuously adjustable LED color temperature. Background technique [0002] Surgical shadowless lamps, examination lamps, and the overall lighting system in the operating room are routine and necessary equipment in hospitals. The use of medical lighting systems is a necessary working condition and prerequisite for many medical jobs. At present, the shadowless lamps and examination lamps used in hospital operating rooms are huge lamp holders composed of umbrella-shaped lamp housings and a group of halogen bulbs. It has many design and application problems, such as the color temperature cannot be adjusted, the temperature rise is too high, the brightness of the central spot is uneven, the power consumption is large, the color difference is large, the volume is large, and it cannot meet the requirements of vertical a...

AI Technical Summary

Problems solved by technology

It has many design and application problems, such as the color temperature cannot be adjusted, the temperature rise is too high, the brightness of the central spot is uneven, the power consumption is large, the color difference is large, the volume is large, and it cannot meet the requirements of vertical and horizontal air laminar flow. Used in high-demand clean operating rooms, low lighting quality affects doctors' identification of tissues; in the past two years, some companies have developed medical lighting devices with single color temperature LED light sources and medical lighting devices composed of LED light sources with different colors

The color temperature of the lighting device composed of a single color temperature LED light source is fixed and cannot be adjusted, and the low color rendering index of the current single color temperature LED is likely to cause wrong diagnosis and operation. The medical lighting device composed of pieces, the light emitted by different color light sources is mixed in the working area, which will cause colored stripes in the working area when there is occlusion, which will seriously affect the observation of medical lighting

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