座舱灯光信号以它输出的彩色灯光、文字或图形显示飞机、系统(子系统)、设备所处的状态(故障、危险或安全工作),给飞行员提供“警告”“预警”及“咨询”信息,保障其安全、顺利地完成飞行任务。信号亮度指标是这类信号显示最重要的特性指标。亮度太低,白天因受阳光照射座舱环境太亮,而看不清所显示的信号,影响飞行员决策,易导致操纵失误,造成飞行事 The cockpit light signal displays the aircraft, system (subsystem), status of the equipment (fault, danger or safety work) with colored lights, text or graphics that it outputs, providing “warning”, “warning” and “advisory” information to the pilot , To ensure its safety and successfully complete the mission. Signal brightness indicators are the most important characteristics of this type of signal display. Brightness is too low, due to sunlight during the day cockpit environment is too bright, and can not see the signal displayed, affecting pilots decision-making, easy to cause manipulation errors, resulting in flight