diff --git a/bsp/qemu-vexpress-a9/drivers/drv_clcd.c b/bsp/qemu-vexpress-a9/drivers/drv_clcd.c
index af3cce4d6b9c5c41e831e44165313cd3cec87f3f..2d012dca84c161c52cf7755bec01a43a93859300 100644
--- a/bsp/qemu-vexpress-a9/drivers/drv_clcd.c
+++ b/bsp/qemu-vexpress-a9/drivers/drv_clcd.c
@@ -109,7 +109,7 @@ int drv_clcd_hw_init(void)
 
     _lcd.width  = CLCD_WIDTH;
     _lcd.height = CLCD_HEIGHT;
-    _lcd.fb     = rt_malloc_align(_lcd.width * _lcd.height * 2, 32);
+    _lcd.fb     = rt_malloc(_lcd.width * _lcd.height * 2);
     if (_lcd.fb == NULL)
     {
         rt_kprintf("initialize frame buffer failed!\n");
diff --git a/bsp/qemu-vexpress-a9/drivers/lvgl/lv_demo.c b/bsp/qemu-vexpress-a9/drivers/lvgl/lv_demo.c
index 44288c23f28ea6eadfe372f25f2f1fe175beeb5c..326d1df1d2a25150c0accbeafb7164324d54f53c 100644
--- a/bsp/qemu-vexpress-a9/drivers/lvgl/lv_demo.c
+++ b/bsp/qemu-vexpress-a9/drivers/lvgl/lv_demo.c
@@ -23,9 +23,11 @@
 
 static void lvgl_thread(void *parameter)
 {
+    /* display demo; you may replace with your LVGL application at here */
     extern void lv_demo_music(void);
     lv_demo_music();
 
+    /* handle the tasks of LVGL */
     while(1)
     {
         lv_task_handler();
diff --git a/bsp/qemu-vexpress-a9/drivers/lvgl/lv_port_disp.c b/bsp/qemu-vexpress-a9/drivers/lvgl/lv_port_disp.c
index 4ccd1bab7f6970daa40081d8f5049f29ee036c10..9bb856a122cbb03d31627c9c723f8338dff18e11 100644
--- a/bsp/qemu-vexpress-a9/drivers/lvgl/lv_port_disp.c
+++ b/bsp/qemu-vexpress-a9/drivers/lvgl/lv_port_disp.c
@@ -116,14 +116,14 @@ void lv_port_disp_init(void)
     RT_ASSERT(info.bits_per_pixel == 8 || info.bits_per_pixel == 16 ||
               info.bits_per_pixel == 24 || info.bits_per_pixel == 32);
 
-    fbuf1 = rt_malloc_align(info.width * info.height * sizeof(lv_color_t), 32);
+    fbuf1 = rt_malloc(info.width * info.height * sizeof(lv_color_t));
     if (fbuf1 == RT_NULL)
     {
         rt_kprintf("Error: alloc disp buf fail\n");
         return;
     }
 
-    fbuf2 = rt_malloc_align(info.width * info.height * sizeof(lv_color_t), 32);
+    fbuf2 = rt_malloc(info.width * info.height * sizeof(lv_color_t));
     if (fbuf2 == RT_NULL)
     {
         rt_kprintf("Error: alloc disp buf fail\n");
diff --git a/bsp/simulator/drivers/lvgl/lv_demo.c b/bsp/simulator/drivers/lvgl/lv_demo.c
index c66dd228e7c505f9f3f35323d3bd1a871de5ead7..101cd1e4943556f1b42a632b0078d7d405de81e9 100644
--- a/bsp/simulator/drivers/lvgl/lv_demo.c
+++ b/bsp/simulator/drivers/lvgl/lv_demo.c
@@ -12,11 +12,8 @@
 #define DBG_LVL    DBG_INFO
 #include <rtdbg.h>
 #include <lvgl.h>
-#include <lv_port_disp.h>
 #include <win32drv.h>
 
-#define IDI_LVGL                       101
-
 #ifndef LV_THREAD_STACK_SIZE
 #define LV_THREAD_STACK_SIZE 4096
 #endif
@@ -28,28 +25,25 @@
 static void lvgl_thread(void *parameter)
 {
     /* initialize win32 driver; don't put this in lv_port_disp() */
-    if (!lv_win32_init(
-        GetModuleHandleW(NULL),
-        SW_SHOW,
-        BSP_LCD_WIDTH,
-        BSP_LCD_HEIGHT,
-        LoadIconW(GetModuleHandleW(NULL), MAKEINTRESOURCE(IDI_LVGL))))
+    if (!lv_win32_init(GetModuleHandleW(NULL), SW_SHOW, BSP_LCD_WIDTH, BSP_LCD_HEIGHT, NULL))
     {
         LOG_E("lv_win32_init failure!");
         return;
     }
-
     lv_win32_add_all_input_devices_to_group(NULL);
 
-    /* display demo */
+    /* display demo; you may replace with your LVGL application at here */
     extern void lv_demo_music(void);
     lv_demo_music();
 
+    /* handle the tasks of LVGL */
     while (!lv_win32_quit_signal)
     {
         lv_task_handler();
-        Sleep(1);
+        rt_thread_mdelay(1);
     }
+
+    LOG_W("LVGL simulator window closed!");
 }
 
 static int lvgl_demo_init(void)
diff --git a/bsp/simulator/drivers/lvgl/lv_port_disp.h b/bsp/simulator/drivers/lvgl/lv_port_disp.h
index 9bcefe5260527a13e01bef5f4aedc10f54d109d4..ef39eb03cd4df06329528ca9f9717e9d5d8e86cd 100644
--- a/bsp/simulator/drivers/lvgl/lv_port_disp.h
+++ b/bsp/simulator/drivers/lvgl/lv_port_disp.h
@@ -14,8 +14,6 @@
 extern "C" {
 #endif
 
-#include <win32drv.h>
-
 void lv_port_disp_init(void);
 
 #ifdef __cplusplus
diff --git a/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c b/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
index d72e6ae7baa71d50c43e9b98dbdfd2669e18da7f..d4ae3cfdbd9b4cad7f86ab35a92eea173f8411c3 100644
--- a/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
+++ b/bsp/stm32/stm32l475-atk-pandora/board/ports/lvgl/lv_demo.c
@@ -29,8 +29,10 @@ static void lvgl_thread(void *parameter)
     const lv_point_t points_array[] =  {{200,35},{0,0},{70,35},{0,0}};
     lv_indev_set_button_points(button_indev, points_array);
 
+    /* display demo; you may replace with your LVGL application at here */
     lv_demo_calendar();
 
+    /* handle the tasks of LVGL */
     while(1)
     {
         lv_task_handler();