diff --git a/arch/sim/src/sim/sim_lcd.c b/arch/sim/src/sim/sim_lcd.c
index 0e490d0119..aab8833878 100644
--- a/arch/sim/src/sim/sim_lcd.c
+++ b/arch/sim/src/sim/sim_lcd.c
@@ -140,6 +140,8 @@ static int sim_getpower(struct lcd_dev_s *dev);
 static int sim_setpower(struct lcd_dev_s *dev, int power);
 static int sim_getcontrast(struct lcd_dev_s *dev);
 static int sim_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
+static int sim_openwindow(struct lcd_dev_s *dev);
+static int sim_closewindow(struct lcd_dev_s *dev);
 
 /****************************************************************************
  * Private Data
@@ -207,6 +209,8 @@ static struct sim_dev_s g_lcddev =
     .setpower     = sim_setpower,
     .getcontrast  = sim_getcontrast,
     .setcontrast  = sim_setcontrast,
+    .open         = sim_openwindow,
+    .close        = sim_closewindow,
   },
 };
 
@@ -431,7 +435,39 @@ static int sim_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
 }
 
 /****************************************************************************
- * Name: sim_updatework
+ * Name: sim_openwindow
+ ****************************************************************************/
+
+static int sim_openwindow(struct lcd_dev_s *dev)
+{
+  int ret = OK;
+  ginfo("lcd_dev=%p\n", dev);
+
+#ifdef CONFIG_SIM_X11FB
+  ret = sim_x11openwindow();
+#endif
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: sim_closewindow
+ ****************************************************************************/
+
+static int sim_closewindow(struct lcd_dev_s *dev)
+{
+  int ret = OK;
+  ginfo("lcd_dev=%p\n", dev);
+
+#ifdef CONFIG_SIM_X11FB
+  ret = sim_x11closewindow();
+#endif
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: sim_x11loop
  ****************************************************************************/
 
 void sim_x11loop(void)
diff --git a/drivers/lcd/lcd_dev.c b/drivers/lcd/lcd_dev.c
index fd7e532344..dc465be722 100644
--- a/drivers/lcd/lcd_dev.c
+++ b/drivers/lcd/lcd_dev.c
@@ -51,6 +51,8 @@ struct lcddev_dev_s
 {
   FAR struct lcd_dev_s *lcd_ptr;
   struct lcd_planeinfo_s planeinfo;
+  mutex_t lock;
+  int16_t crefs;
 };
 
 /****************************************************************************
@@ -59,6 +61,8 @@ struct lcddev_dev_s
 
 /* Character driver methods */
 
+static int lcddev_open(FAR struct file *filep);
+static int lcddev_close(FAR struct file *filep);
 static int lcddev_ioctl(FAR struct file *filep, int cmd,
                         unsigned long arg);
 
@@ -68,8 +72,8 @@ static int lcddev_ioctl(FAR struct file *filep, int cmd,
 
 static const struct file_operations g_lcddev_fops =
 {
-  NULL,         /* open */
-  NULL,         /* close */
+  lcddev_open,  /* open */
+  lcddev_close, /* close */
   NULL,         /* read */
   NULL,         /* write */
   NULL,         /* seek */
@@ -80,6 +84,78 @@ static const struct file_operations g_lcddev_fops =
  * Private Functions
  ****************************************************************************/
 
+/****************************************************************************
+ * Name: lcddev_open
+ ****************************************************************************/
+
+static int lcddev_open(FAR struct file *filep)
+{
+  FAR struct lcddev_dev_s *priv;
+  int ret;
+
+  priv = filep->f_inode->i_private;
+
+  ret = nxmutex_lock(&priv->lock);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  if (priv->crefs == 0)
+    {
+      if (priv->lcd_ptr->open != NULL &&
+          (ret = priv->lcd_ptr->open(priv->lcd_ptr)) < 0)
+        {
+          goto err_lcd;
+        }
+    }
+
+  priv->crefs++;
+  DEBUGASSERT(priv->crefs > 0);
+
+  nxmutex_unlock(&priv->lock);
+  return OK;
+
+err_lcd:
+  nxmutex_unlock(&priv->lock);
+  return ret;
+}
+
+/****************************************************************************
+ * Name: lcddev_close
+ ****************************************************************************/
+
+static int lcddev_close(FAR struct file *filep)
+{
+  FAR struct lcddev_dev_s *priv;
+  int ret;
+
+  priv = filep->f_inode->i_private;
+
+  ret = nxmutex_lock(&priv->lock);
+  if (ret < 0)
+    {
+      return ret;
+    }
+
+  if (priv->crefs == 1)
+    {
+      if (priv->lcd_ptr->close != NULL)
+        {
+          ret = priv->lcd_ptr->close(priv->lcd_ptr);
+        }
+    }
+
+  if (ret >= 0)
+    {
+      DEBUGASSERT(priv->crefs > 0);
+      priv->crefs--;
+    }
+
+  nxmutex_unlock(&priv->lock);
+  return ret;
+}
+
 /****************************************************************************
  * Name: lcddev_ioctl
  ****************************************************************************/
@@ -349,6 +425,8 @@ int lcddev_register(int devno)
       return -ENOMEM;
     }
 
+  nxmutex_init(&priv->lock);
+
   priv->lcd_ptr = board_lcd_getdev(devno);
   if (!priv->lcd_ptr)
     {
@@ -370,7 +448,9 @@ int lcddev_register(int devno)
     }
 
   return ret;
+
 err:
+  nxmutex_destroy(&priv->lock);
   kmm_free(priv);
   return ret;
 }
diff --git a/drivers/lcd/lcd_framebuffer.c b/drivers/lcd/lcd_framebuffer.c
index e37efe9a52..3fd21109fb 100644
--- a/drivers/lcd/lcd_framebuffer.c
+++ b/drivers/lcd/lcd_framebuffer.c
@@ -524,6 +524,60 @@ static int lcdfb_ioctl(FAR struct fb_vtable_s *vtable,
   return ret;
 }
 
+/****************************************************************************
+ * Name: lcdfb_open
+ ****************************************************************************/
+
+static int lcdfb_open(FAR struct fb_vtable_s *vtable)
+{
+  int ret = OK;
+  FAR struct lcdfb_dev_s *priv;
+  FAR struct lcd_dev_s *lcd;
+
+  DEBUGASSERT(vtable != NULL);
+
+  priv = (FAR struct lcdfb_dev_s *)vtable;
+
+  if (priv != NULL)
+    {
+      lcd = priv->lcd;
+
+      if (lcd->open)
+        {
+          ret = lcd->open(lcd);
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: lcdfb_close
+ ****************************************************************************/
+
+static int lcdfb_close(FAR struct fb_vtable_s *vtable)
+{
+  int ret = OK;
+  FAR struct lcdfb_dev_s *priv;
+  FAR struct lcd_dev_s *lcd;
+
+  DEBUGASSERT(vtable != NULL);
+
+  priv = (FAR struct lcdfb_dev_s *)vtable;
+
+  if (priv != NULL)
+    {
+      lcd = priv->lcd;
+
+      if (lcd->close)
+        {
+          ret = lcd->close(lcd);
+        }
+    }
+
+  return ret;
+}
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/
@@ -581,6 +635,8 @@ int up_fbinitialize(int display)
   priv->vtable.updatearea   = lcdfb_updateearea,
   priv->vtable.setpower     = lcdfb_setpower,
   priv->vtable.ioctl        = lcdfb_ioctl,
+  priv->vtable.open         = lcdfb_open,
+  priv->vtable.close        = lcdfb_close,
 
 #ifdef CONFIG_LCD_EXTERNINIT
   /* Use external graphics driver initialization */
diff --git a/include/nuttx/lcd/lcd.h b/include/nuttx/lcd/lcd.h
index 0407fe33e5..6063e415bc 100644
--- a/include/nuttx/lcd/lcd.h
+++ b/include/nuttx/lcd/lcd.h
@@ -268,6 +268,11 @@ struct lcd_dev_s
   /* Passthrough unknown ioctl commands. */
 
   int (*ioctl)(FAR struct lcd_dev_s *dev, int cmd, unsigned long arg);
+
+  /* open/close window. */
+
+  int (*open)(FAR struct lcd_dev_s *dev);
+  int (*close)(FAR struct lcd_dev_s *dev);
 };
 
 /****************************************************************************