Device and method for adjusting LED brightness and chromaticity consistency
An adjustment method and consistent technology, which is applied in the direction of lighting devices, lamp circuit layout, light source, etc., to solve the effect of screen flickering
Active Publication Date: 2017-10-31
FORYOU GENERAL ELECTRONICS
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[0005] The invention provides a device and method for adjusting the consistency of LED brightness and chromaticity, which avoids flickering of LED lights and LCD flickering when LEDs are used as backlights, and solves the problem of consistent brightness and chromaticity of LED lights on instrument panels, car audio panels, and displays. The problem
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[0030] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are only for reference and description, and do not constitute a limitation to the protection scope of the present invention.
[0031] Such as figure 1 As shown, the embodiments of the present invention provide an LED brightness and chromaticity consistency adjustment device on the one hand, including a headlight power supply switch 1 for controlling the power supply of the headlight, a dimmer 2, and the dimmer refers to a car dimmer According to the light requirements of the environment, the components for adjusting the light brightness of the instrument panel in the car; the headlight power supply switch 1 is connected to the detection circuit 3, the dimmer 2 is connected to the dimming PWM acquisition circuit 4, and the detection circuit 3, The dimming PWM acquisition circuit 4 is connected to the micro-processing unit ...
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The invention provides a device and method for adjusting the consistency of LED brightness and chromaticity. The device includes a headlight power supply switch and a dimmer. The headlight power supply switch outputs a headlight signal to a detection circuit, and the dimmer is connected to a dimming PWM acquisition circuit. Both the detection circuit and the dimming PWM acquisition circuit are connected to the micro-processing unit, the micro-processing unit is connected to the PWM regulation circuit, and the PWM regulation circuit is connected to the LED unit; the method includes detection steps: the PWM_IN signal processing step is performed when the headlight power supply switch is detected; the PWM_IN signal is Processing steps: After processing the collected low-frequency PWM_IN signal, output a PWM_CTL signal with a high frequency and a duty cycle range that is the set duty cycle range multiplied by the ratio of the actual operating current of the LED to the LED spectroscopic and color separation detection current; PWM_OUT signal output steps : Output signal PWM_OUT to LED unit according to PWM_CTL signal. The invention avoids the flickering of the LED light and the flickering of the LCD when the LED is used as the backlight, and solves the problem of the consistency of the brightness and chromaticity of the LED light of the instrument panel, the car audio panel and the display.
Description
technical field [0001] The invention relates to the technical field of LED brightness and chromaticity adjustment, in particular to an LED brightness and chromaticity consistency adjustment device and method. Background technique [0002] With the development of the automobile industry in the direction of high-end and humanization, LEDs are widely used in automobile equipment to bring users a comfortable visual experience. Automotive LED has developed from the traditional fixed brightness and chromaticity to the use of dimmers to adjust the brightness and chromaticity, which brings better visual experience and safety to users, but there are still the following deficiencies: [0003] 1) When used on an LCD screen for car display with a dimmer, when the light is on, there will be a problem of screen flicker; [0004] 2) When used on car dashboards, car audio and other in-vehicle equipment, it will cause glare due to excessive light, poor brightness and chromaticity consistenc...
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IPC IPC(8): H05B37/02
Inventor 龙林云张晓龙曾海龙陈永基
Owner FORYOU GENERAL ELECTRONICS