CN202679720U - LED lamp based on high color rendering index and possessing adjustable brightness and color temperature - Google Patents

Abstract

The utility model discloses a LED lamp based on high color rendering index and possessing adjustable brightness and color temperature, comprising a cold white light LED lamp set, a warm white light LED lamp set, an amber light LED set, a microcontroller, a first light modulation drive circuit, a second light modulation drive circuit, a third light modulation drive circuit and a power supply unit. The microcontroller respectively emits PWM control signals to the three sets of light modulation drive circuits in dependence on external light modulation signals. The first light modulation drive circuit changes matching colors of the cold white light LED lamp set and the warm white light LED lamp set in dependence on the PWM control signals to realize color temperature adjustment; the second light modulation drive circuit controls the brightness change of the cold white light LED lamp set and the warm white light LED lamp set in dependence on the PWM control signals when a color temperature is determined; and the third light modulation drive circuit controls the amber light LED set in dependence on the PWM control signals and controls color rendering index of each color temperature point through color compensation. The power supply unit supplies stable voltage for the microcontroller and each LED lamp set; the external light modulation signals are transmitted to the microcontroller through a button light modulation or remote light modulation mode.

Description

Brightness and color temperature adjustable LED lights based on high color rendering index

technical field

The utility model relates to a lighting fixture, in particular to a high color rendering index LED lamp whose brightness and color temperature can be adjusted arbitrarily.

Background technique

At present, some LED lamps on the market can adjust the color temperature and brightness. The technical means used by them are to output different color temperatures through the adjustment and mixing of two LEDs with different color temperatures (cool white light and warm white light). The current white light LED technology mainly adopts The production process of blue light chips coated with fluorescent powder, this technology has followed the light emitting principle of fluorescent tubes in a certain sense. Due to the lack of red light and green light components, this technology has a congenital color rendering index. Insufficient defects, the color rendering index of cool white LEDs on the market is lower than 80, so the color rendering index is also changing when the color temperature is adjusted, especially when the color temperature is adjusted to above 4500K, the color rendering index is lower than 80, In this way, the demand for high color rendering index in the market cannot be met.

Utility model content

In view of the above deficiencies, the utility model provides a high color rendering index LED lamp based on a high color rendering index LED lamp whose brightness and color temperature can be adjusted arbitrarily and maintain a high color rendering index. It includes a cool white LED lamp group, a warm white LED lamp group, amber LED lamp group, microcontroller, first dimming driving circuit, second dimming driving circuit and third dimming driving circuit, the microcontroller respectively adjusts the first dimming signal according to the external dimming signal The light driving circuit, the second dimming driving circuit and the third dimming driving circuit send PWM control signals, and the first dimming driving circuit controls and changes the configuration of the cool white LED lamp group and the warm white LED lamp group according to the received PWM control signal. The color temperature is adjusted by comparing the color; the second dimming drive circuit controls the brightness change of the cool white LED light group and the warm white LED light group according to the received PWM control signal after the color temperature is determined; the third dimming drive circuit controls the brightness change according to the received PWM control signal. The PWM control signal controls the amber LED light group to control the color rendering index of each color temperature point through color compensation.

The external dimming signal is sent to the microcontroller by button dimming or remote dimming.

It also includes a power supply unit that provides regulated voltages to the microcontroller, cool white LEDs, warm white LEDs and amber LEDs.

Beneficial effects of the utility model: the utility model can send the external dimming signal to the microcontroller through button dimming or remote control dimming, and the microcontroller receives the external dimming signal to automatically identify the source of the dimming signal and decode it , and then converted into PWM signals to output three groups of dimming drive circuits. The color temperature can be adjusted arbitrarily within the range of 2700K-7000K through the color ratio of the cool white LED lamp group and the warm white LED lamp group, and the brightness can be adjusted at a certain color temperature point. It can be adjusted arbitrarily from 1% to 100%, and the color rendering index of each color temperature point is greater than 90 after the color compensation of the amber LED.

Description of drawings

Fig. 1 is a functional schematic diagram of the high color rendering index LED lamp with adjustable brightness and color temperature according to the present invention.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further elaborated.

As shown in Figure 1, the high color rendering index LED lamp with adjustable brightness and color temperature of the present invention includes a cool white LED lamp group, a warm white LED lamp group, an amber LED lamp group, a microcontroller, a first dimming The driving circuit, the second dimming driving circuit, the third dimming driving circuit and the power supply unit, the micro-controller respectively provides the first dimming driving circuit, the second dimming driving circuit and the third dimming driving circuit A PWM control signal is sent out, and the first dimming drive circuit controls and changes the matching color of the cool white LED lamp group and the warm white LED lamp group according to the received PWM control signal to realize color temperature adjustment; the second dimming drive circuit controls the color temperature after the color temperature is determined , according to the received PWM control signal to control the brightness change of the cool white LED light group and the warm white LED light group; the third dimming drive circuit controls the amber light LED light group according to the received PWM control signal to control each color temperature through color compensation The color rendering index of dots, the power supply unit is used to provide stable voltage for the microcontroller, cool white LED light group, warm white LED light group and amber light LED light group, where the external dimming signal can be dimmed by buttons or remote control The way the light is sent to the microcontroller.

In the actual control process, the power supply unit provides stable and reliable voltage to the system and each LED light group. The microcontroller is preset with a decoding and identification program for automatic identification of different dimming signals. The operator adjusts the light through the button or remote control The external dimming signal is sent to the microcontroller by means of dimming, and the microcontroller receives the external dimming signal instruction to automatically identify the source of the dimming signal, decode it, and convert it into a PWM adjustment signal (brightness adjustment signal, color temperature adjustment signal and color rendering signal) Index adjustment signal), according to the color temperature adjustment signal to drive the first dimming drive circuit to control and change the matching color of the cool white LED lamp group and the warm white LED lamp group to realize that the color temperature can be adjusted arbitrarily within the range of 2700K-7000K, and the color temperature point can be determined Later, drive the second dimming drive circuit according to the brightness adjustment signal to control the brightness of the cold white LED lamp group and the warm white LED lamp group, which can be adjusted arbitrarily from 1% to 100%, and drive the third dimming driver according to the color rendering index adjustment signal The circuit controls the amber LED light group to control the color rendering index (all greater than 90) of each color temperature point through color compensation.

The above description is only a preferred embodiment of the present invention, the present invention is not limited to the above embodiment, there may be local minor structural changes during the implementation process, if the various changes or modifications of the present invention do not depart from the spirit of the present invention and scope, and belong to the claims and equivalent technical scope of the present invention, the present invention also intends to include these changes and modifications.

Claims (3)

1. A high color rendering index LED lamp with adjustable brightness and color temperature is characterized in that it includes a cool white LED lamp group, a warm white LED lamp group, an amber light LED lamp group, a microcontroller, and a first dimming driving circuit, the second dimming driving circuit and the third dimming driving circuit, the micro-controller respectively sends the first dimming driving circuit, the second dimming driving circuit and the third dimming driving circuit according to the external dimming signal PWM control signal, the first dimming drive circuit controls and changes the matching color of the cool white LED lamp group and the warm white LED lamp group according to the received PWM control signal to realize color temperature adjustment; after the second dimming drive circuit determines the color temperature, According to the received PWM control signal, control the brightness change of the cool white LED lamp group and the warm white LED lamp group; the third dimming drive circuit controls the amber LED lamp group according to the received PWM control signal and controls each color temperature point through color compensation color rendering index. 2. The high color rendering index LED lamp with adjustable brightness and color temperature according to claim 1, wherein the external dimming signal is sent to the microcontroller by means of button dimming or remote dimming . 3. The LED lamp based on high color rendering index with adjustable brightness and color temperature according to claim 1, characterized in that it also includes a set for microcontroller, cool white LED lamp group, warm white LED lamp group and amber light The LED lamp group provides a stable voltage power supply unit.