遥控器显示屏背光控制方案的设计与应用  

Design and Application of Remote Control Screen Backlight Control Scheme

作　　者：张谊 

机构地区：[1]广东美的制冷设备有限公司,佛山528311

出　　处：《日用电器》2023年第6期59-63,共5页ELECTRICAL APPLIANCES

摘　　要：本文设计了一种对遥控器显示屏的背光进行控制的方案,实现对以干电池为电源供电的遥控器,能稳定的驱动点亮其白色LED的背光源。系统通过升压电路对电池电压进行升压变换,同时通过检测电池电压来估算电池电量,实现基于电池电量的可变占空比的PWM控制,使变换后的直流电压达到满足遥控器背光源点亮的电压值,且在电池电压发生波动的情况下输出的电压也保持稳定。In this paper,a scheme of controlling the backlight of the remote control display screen is designed to realize the remote control with dry battery as the power supply,which can stably drive the backlight of the white LED.The system uses a booster circuit to boost the battery voltage,and estimates the battery power by detecting the battery voltage to realize the PWM control based on the variable duty ratio of the battery power,so that the converted DC voltage can meet the voltage value lit by the remote control backlight,and the output voltage remains stable when the battery voltage fluctuates.

关 键 词：遥控器背光 白色LED 直流升压 PWM控制 

分 类 号：TP872[自动化与计算机技术—检测技术与自动化装置]