diff --git a/main/boards/common/backlight.cc b/main/boards/common/backlight.cc
index 5f2c08b0..39a50888 100644
--- a/main/boards/common/backlight.cc
+++ b/main/boards/common/backlight.cc
@@ -31,8 +31,16 @@ Backlight::~Backlight() {
 
 void Backlight::RestoreBrightness() {
     // Load brightness from settings
-    Settings settings("display");
-    SetBrightness(settings.GetInt("brightness", 75));
+    Settings settings("display");  
+    int saved_brightness = settings.GetInt("brightness", 75);
+    
+    // 检查亮度值是否为0或过小，设置默认值
+    if (saved_brightness <= 0) {
+        ESP_LOGW(TAG, "Invalid brightness value (%d), setting to default", saved_brightness);
+        saved_brightness = 10;  // 设置一个较低的默认值
+    }
+    
+    SetBrightness(saved_brightness);
 }
 
 void Backlight::SetBrightness(uint8_t brightness, bool permanent) {