diff --git a/protos/device_state.proto b/protos/device_state.proto
index 658f618..c028267 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -54,6 +54,8 @@ message  SwitchState{
 message SignalState{
   //信号机索引
   string  id = 1;
+	//信号机显示
+	Signal.Aspect aspect = 2;
 }
 //信号机显示枚举定义
 message Signal {