CN201180964Y - Adjustable color key backlight - Google Patents

Abstract

The utility model discloses a color-adjustable key backlight device, which comprises several groups of three-color LED lamp groups controlled by the MCU of a vehicle-mounted audio-visual equipment host, and the LED lamp groups are arranged at the bottom of the key. Composed of green and blue three original LEDs, the main unit of the car audio-visual equipment is designed to provide each color of the LED light group with a constant current power supply that can be grouped by color and has current sharing characteristics. The utility model can freely adjust the color and brightness of the required buttons according to the needs, so that the interior style of the center console is more coordinated after the owners of different car models refit the audio-visual products, so that the manufacturers of the vehicle-mounted audio-visual equipment do not need to produce a variety of different products to meet the requirements. Market demand, reducing product production and sales costs.

Description

Adjustable color key backlight

technical field

The utility model relates to the technical field of button backlights for vehicle-mounted audio-visual equipment, and more specifically relates to a button backlight device for vehicle-mounted audio-visual navigation equipment.

Background technique

At present, with the continuous development of science and technology, people's requirements for the design of audio-visual equipment in cars are also increasing. The audio-visual equipment in the car is mainly composed of a DVD player, a full-color LCD display, and an audio power amplifier. Free to use a DVD player or audio equipment in an insufficient environment, and the equipment keys are usually equipped with a backlight device. Existing car key backlights usually use different backlight colors according to the style of each model. In the automotive aftermarket, manufacturers of on-board audio-visual equipment cannot produce a product that can be installed on different models to be consistent with the color of the button backlight of the original car's central air conditioner. As a result, the interior style of the center console is extremely uncoordinated after the car owner refits the audio-visual products.

Contents of the invention

The purpose of the utility model is to provide a color-adjustable button backlight device which is easy to install and adjust and has a wide application range in order to solve the technical insufficiency of the existing similar products.

The utility model adopts the following technical solutions to achieve the above object: a color-adjustable button backlight device, including several groups of three-color LED lamp groups controlled by the MCU of the vehicle-mounted audio-visual equipment host, the LED lamp groups are arranged at the bottom of the button, and the LED lights The group is mainly composed of red, green, and blue LEDs. The main unit of the car audio-visual equipment is designed to provide each color of the LED light group with a constant current power supply that can be grouped by color and has current sharing characteristics.

As a further illustration of the above solution, the LEDs composed of the three primary colors of red, green and blue are distributed on a printed circuit board of the keypad in series in the same color to form an LED light group.

The constant current power supply is provided with a backlight color control circuit, including a DC boost circuit and a constant current drive circuit connected to it, and the constant current drive circuit is composed of an operational amplifier and a triode.

The beneficial effects that the utility model can achieve by adopting the above-mentioned technical solutions are: the utility model adopts the combination with the main unit of the vehicle-mounted audio-visual equipment, and by adjusting the current ratio of the red, green and blue LEDs, the entire button backlight device can be freely adjusted as required The color and brightness of the required buttons can be determined, so that the interior style of the center console is more coordinated after the owners of different models have modified the audio-visual products. Manufacturers of in-vehicle audio-visual equipment do not need to produce a variety of different products to meet market demand, reducing product production and sales costs.

Description of drawings

Fig. 1 is the circuit diagram of the utility model.

Explanation of reference signs: 1. Three-color LED lamp group 2. LED 3. DC boost circuit 4. Constant current drive circuit

Detailed ways

As shown in Figure 1, the utility model is a color-tunable button backlight device, which includes several groups of three-color LED lamp groups 1 controlled by the MCU of the vehicle-mounted audio-visual equipment host. The LED lamp group 1 is arranged at the bottom of the button. Consisting of red, green and blue LEDs 2, the vehicle-mounted audio-visual equipment host is designed to provide each color of the LED lamp group 1 with a constant current power supply that can be grouped by color and has a current-sharing characteristic. LED2 composed of three primary colors of red, green and blue are distributed on a printed circuit board of a button board in series in the same color to form an LED light group, so that the current flowing through LEDs of various colors is equal, and the constant current power supply is equipped with a backlight color control The circuit includes a DC boost circuit 3 and a constant current drive circuit 4 connected thereto. The DC boost circuit 3 is composed of a control chip modeled as MC34063 and its external circuit. The external circuit is composed of an inductor, a resistor, a transistor, and a capacitor. The current driving circuit 4 is composed of an operational amplifier and a triode.

When in use, by controlling the control button of the button backlight device in the main unit of the car audio-visual equipment, the whole can be freely adjusted to the required button color and brightness according to the needs, so that the interior style of the center console after the modification of the audio-visual products by the owners of different models more coordinated.

The utility model is not limited to the above-mentioned embodiments, and those skilled in the art can also make various modifications and changes, all of which are within the scope of protection required by the utility model without departing from the spirit of the utility model.

Claims (3)

1. A color-adjustable button backlight device, including several groups of three-color LED light groups controlled by the MCU of the vehicle-mounted audio-visual equipment host. , blue three original LED composition, the vehicle-mounted audio-visual equipment host is provided with a constant-current power supply that can be grouped by color and has current-sharing characteristics for each color of the LED light group. 2. The color-adjustable button backlight device according to claim 1, characterized in that: the LEDs composed of three primary colors of red, green and blue are distributed on a printed circuit board of a button board in series in the same color to form an LED light Group. 3. The color-adjustable button backlight device according to claim 1 or 2, characterized in that: the constant current power supply is provided with a backlight color control circuit, including a DC boost circuit and a constant current drive circuit connected thereto. The current driving circuit is composed of an op amp and a triode.