diff --git a/src/main/kotlin/service/AutoTradingManager.kt b/src/main/kotlin/service/AutoTradingManager.kt
index 36336e4..b6c20e0 100644
--- a/src/main/kotlin/service/AutoTradingManager.kt
+++ b/src/main/kotlin/service/AutoTradingManager.kt
@@ -79,6 +79,7 @@ object AutoTradingManager {
     var webSocketConnect by  mutableStateOf(false)
 
     var testFlag = false
+
     fun startBackgroundScheduler() {
         scope.launch {
             while (isActive) {
@@ -86,6 +87,8 @@ object AutoTradingManager {
                 if (now.isAfter(H08M30) && now.isBefore(H18) && !shouldShowFullWindow) {
                     shouldShowFullWindow = true
                     SystemSleepPreventer.wakeDisplay()
+                } else if (now.isAfter(LocalTime.of(23, 50)) && now.isBefore(LocalTime.of(8, 0))) {
+                    SystemSleepPreventer.sleepDisplay()
                 }
                 delay(60_000  * 3) // 1분마다 체크
             }