diff --git a/projector.py b/projector.py
index ac5d39b..c0923fe 100755
--- a/projector.py
+++ b/projector.py
@@ -8,6 +8,7 @@ import os
 import math
 import subprocess
 import sys
+import ctypes
 import tkinter.messagebox as messagebox
 from web.server import start_server_thread
 
@@ -159,6 +160,26 @@ class SongProjector:
             except Exception as e:
                 print(f"Napaka pri zagonu web serverja: {e}")
 
+        # --------------------------------------------------
+        #  Preprečevanje ohranjevalnika zaslona
+        # --------------------------------------------------
+        self.keep_awake()
+
+    def keep_awake(self):
+        """
+        Prepreči vklop ohranjevalnika zaslona ali spanja.
+        """
+        try:
+            if sys.platform.startswith("win"):
+                # Windows: ES_CONTINUOUS | ES_DISPLAY_REQUIRED | ES_SYSTEM_REQUIRED
+                # 0x80000000 | 0x00000002 | 0x00000001
+                ctypes.windll.kernel32.SetThreadExecutionState(0x80000003)
+            elif sys.platform == "linux":
+                # Linux: poskusimo z xset (če smo v X11)
+                subprocess.Popen(["xset", "s", "off", "-dpms"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+        except Exception as e:
+            print(f"Napaka pri preprečevanju spanja: {e}")
+
     # ------------------------------------------------------
     #  NOVA METODA: enakomeren prelom predolgih vrstic
     # ------------------------------------------------------
@@ -463,6 +484,20 @@ class SongProjector:
     #  Izhod
     # ------------------------------------------------------
     def exit_program(self, event=None):
+        # Ponastavi stanje preprečevanja spanja na Windows
+        if sys.platform.startswith("win"):
+            try:
+                # ES_CONTINUOUS (0x80000000)
+                ctypes.windll.kernel32.SetThreadExecutionState(0x80000000)
+            except:
+                pass
+        elif sys.platform == "linux":
+            try:
+                # Ponovno vklopi ohranjevalnik in DPMS (privzete vrednosti)
+                subprocess.Popen(["xset", "s", "on", "+dpms"], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
+            except:
+                pass
+
         self.conn.close()
         self.root.destroy()