diff --git a/demo/spi/pcd8544_nokia5110_lcd/pcd8544.c b/demo/spi/pcd8544_nokia5110_lcd/pcd8544.c
index 6461822..e5c0cb6 100644
--- a/demo/spi/pcd8544_nokia5110_lcd/pcd8544.c
+++ b/demo/spi/pcd8544_nokia5110_lcd/pcd8544.c
@@ -129,7 +129,7 @@ void PCD8544_SetDisplayNormal(void)
 void PCD8544_Init(void)
 {
     PCD8544_Reset();
-    PCD8544_SetContrast(0x06, 0x3F);
+    PCD8544_SetContrast(0x06, 0x20);
     PCD8544_SetDisplayNormal();
 }
 
diff --git a/demo/spi/pcd8544_nokia5110_lcd/pcd8544_stc8h3k.c b/demo/spi/pcd8544_nokia5110_lcd/pcd8544_stc8h3k.c
index d7fc919..7d6774b 100644
--- a/demo/spi/pcd8544_nokia5110_lcd/pcd8544_stc8h3k.c
+++ b/demo/spi/pcd8544_nokia5110_lcd/pcd8544_stc8h3k.c
@@ -79,7 +79,7 @@ int main(void)
         PCD8544_SetDisplayBlank();
         SYS_Delay(200);
         PCD8544_SetDisplayNormal();
-        SYS_Delay(200);
+        SYS_Delay(500);
         PCD8544_Fill(0);
 
         PCD8544_DrawLine(0,   0,  83,  0, 1);
@@ -87,6 +87,7 @@ int main(void)
         PCD8544_DrawLine(83,  0,  83, 47, 1);
         PCD8544_DrawLine(0,  47,  83, 47, 1);
         PCD8544_UpdateScreen();
+        SYS_Delay(500);
 
         PCD8544_GotoXY(3, 3);
         PCD8544_Puts("LCD:PCD8544", &Font_5x7, 1);
@@ -101,8 +102,7 @@ int main(void)
         PCD8544_SetPowerDownMode(HAL_State_ON);
         SYS_Delay(1000);
         PCD8544_SetPowerDownMode(HAL_State_OFF);
-        SYS_Delay(2000);
-
+        SYS_Delay(1000);
         PCD8544_SetDisplayInverted();
         SYS_Delay(1000);
         PCD8544_SetDisplayNormal();
@@ -124,7 +124,7 @@ int main(void)
             }
             SYS_Delay(1000);
         }
-        PCD8544_SetContrast(0x06, 0x3F);
+        PCD8544_SetContrast(0x06, 0x20);
         PCD8544_Fill(0);
 
         y1 = 47, y2 = 0;