diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index bc98f163b..80efd5925 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -20,4 +20,5 @@ object PreferKey {
     const val fontFolder = "fontFolder"
     const val backupPath = "backupUri"
     const val threadCount = "threadCount"
+    const val keepLight = "keep_light"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 8bd8c8d0c..d74ea4be4 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -553,18 +553,22 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         observeEvent<String>(Bus.REPLACE) {
             ReplaceEditDialog().show(supportFragmentManager, "replaceEditDialog")
         }
+        observeEvent<Boolean>(PreferKey.keepLight) {
+            upScreenTimeOut()
+        }
     }
 
     private fun upScreenTimeOut() {
-        getPrefString("keep_light")?.let {
+        getPrefString(PreferKey.keepLight)?.let {
             screenTimeOut = it.toLong() * 1000
         }
+        screenOffTimerStart()
     }
 
     /**
      * 重置黑屏时间
      */
-    fun screenOffTimerStart() {
+    override fun screenOffTimerStart() {
         if (screenTimeOut < 0) {
             Help.keepScreenOn(window, true)
             return
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
index 899d58d63..0eac917a1 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
@@ -95,6 +95,7 @@ class MoreConfigDialog : DialogFragment() {
                 PreferKey.hideStatusBar -> postEvent(Bus.UP_CONFIG, true)
                 PreferKey.hideNavigationBar -> postEvent(Bus.UP_CONFIG, true)
                 PreferKey.clickAllNext -> postEvent(Bus.UP_CONFIG, true)
+                PreferKey.keepLight -> postEvent(PreferKey.keepLight, true)
             }
         }
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
index 84dafcaa6..5a57dbdd6 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
@@ -65,6 +65,7 @@ class PageView(context: Context, attrs: AttributeSet) :
 
     @SuppressLint("ClickableViewAccessibility")
     override fun onTouchEvent(event: MotionEvent): Boolean {
+        callBack?.screenOffTimerStart()
         return pageDelegate?.onTouch(event) ?: super.onTouchEvent(event)
     }
 
@@ -241,5 +242,7 @@ class PageView(context: Context, attrs: AttributeSet) :
         fun clickCenter()
 
         val isInitFinish: Boolean
+
+        fun screenOffTimerStart()
     }
 }