diff --git a/inkycal/display/drivers/10_in_3.py b/inkycal/display/drivers/10_in_3.py
index 7d7b3fa..ee37e92 100644
--- a/inkycal/display/drivers/10_in_3.py
+++ b/inkycal/display/drivers/10_in_3.py
@@ -36,8 +36,8 @@ class EPD:
     def getbuffer(self, image):
         """ad-hoc"""
         image = image.rotate(90, expand=True).transpose(Image.FLIP_LEFT_RIGHT)
-        image.convert('RGB').save(os.path.join(settings.IMAGE_FOLDER, 'canvas.bmp'), 'BMP')
-        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {settings.IMAGE_FOLDER + "canvas.bmp"}'
+        image.convert("RGB").save(os.path.join(settings.IMAGE_FOLDER, "canvas.bmp"), "BMP")
+        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {os.path.join(settings.IMAGE_FOLDER, "canvas.bmp")}'
         print(command)
         return command
 
diff --git a/inkycal/display/drivers/7_in_8.py b/inkycal/display/drivers/7_in_8.py
index 5f9cf51..9e700c7 100644
--- a/inkycal/display/drivers/7_in_8.py
+++ b/inkycal/display/drivers/7_in_8.py
@@ -34,8 +34,8 @@ class EPD:
     def getbuffer(self, image):
         """ad-hoc"""
         image = image.rotate(90, expand=True)
-        image.convert('RGB').save(os.path.join(settings.IMAGE_FOLDER, 'canvas.bmp'), 'BMP')
-        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {settings.IMAGE_FOLDER + "canvas.bmp"}'
+        image.convert("RGB").save(os.path.join(settings.IMAGE_FOLDER, "canvas.bmp"), 'BMP')
+        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {os.path.join(settings.IMAGE_FOLDER, "canvas.bmp")}'
         print(command)
         return command
 
diff --git a/inkycal/display/drivers/9_in_7.py b/inkycal/display/drivers/9_in_7.py
index c81feef..f801dcf 100644
--- a/inkycal/display/drivers/9_in_7.py
+++ b/inkycal/display/drivers/9_in_7.py
@@ -2,6 +2,7 @@
 9.7" driver class
 Copyright by aceinnolab
 """
+import os
 from subprocess import run
 
 from inkycal.settings import Settings
@@ -10,11 +11,8 @@ from inkycal.settings import Settings
 EPD_WIDTH = 1200
 EPD_HEIGHT = 825
 
-
 settings = Settings()
 
-command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {settings.IMAGE_FOLDER + "canvas.bmp"}'
-
 
 class EPD:
 
@@ -36,8 +34,8 @@ class EPD:
     def getbuffer(self, image):
         """ad-hoc"""
         image = image.rotate(90, expand=True)
-        image.convert('RGB').save(settings.IMAGE_FOLDER + 'canvas.bmp', 'BMP')
-        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {settings.IMAGE_FOLDER + "canvas.bmp"}'
+        image.convert("RGB").save(os.path.join(settings.IMAGE_FOLDER, "canvas.bmp"), "BMP")
+        command = f'sudo {settings.PARALLEL_DRIVER_PATH}/epd -{settings.VCOM} 0 {os.path.join(settings.IMAGE_FOLDER, "canvas.bmp")}'
         print(command)
         return command