diff --git a/devtimer.py b/devtimer.py
index ae010ed..76a5bab 100755
--- a/devtimer.py
+++ b/devtimer.py
@@ -177,7 +177,7 @@
 
     while True:
         update_temp = Thread(name="Update Temp", target=read_probe).start()
-        Thread(name="Temp", target=show_temp, args=(display_temp, CURRENT_TEMP)).start()
+        Thread(name="Temp", target=show_temp, args=(temp_led, CURRENT_TEMP)).start()
 
         if DEBUG:
             sys.stdout.write("Temp: %sF\n" % CURRENT_TEMP)
@@ -189,36 +189,36 @@
 # Negative temps are 2 digits, positive temps are 3 digits.
 # Suppress leading zeros.
 
-def show_temp(display_temp, temp):
+def show_temp(temp_led, temp):
 
     global OUTOFRANGE
 
-    display_temp.brightness=TIME_BRIGHT-DIM_BY
+    temp_led.brightness=TIME_BRIGHT-DIM_BY
 
     if temp < 0:    # The leading digit is a minus sign
-        hun = display_time.digit_to_segment[MINUS]
+        hun = time_led.digit_to_segment[MINUS]
         temp = abs(temp)
     else:
         hun = temp // 100
         if hun != 0:
-            hun = display_time.digit_to_segment[hun]
+            hun = time_led.digit_to_segment[hun]
 
     ten  =(temp % 100) // 10
     if ten != 0:
-        ten = display_time.digit_to_segment[ten]
+        ten = time_led.digit_to_segment[ten]
 
-    one = display_time.digit_to_segment[(temp % 100) % 10]
-    F = display_time.digit_to_segment[15]
+    one = time_led.digit_to_segment[(temp % 100) % 10]
+    F = time_led.digit_to_segment[15]
 
-    display_temp.set_segments([hun, ten, one, F])
+    temp_led.set_segments([hun, ten, one, F])
     sleep(0.5)
 
     # If we're in a compensating profile and out of
     # temperature range, blink the time display
 
     if OUTOFRANGE:
-        display_temp.brightness=0
-        display_temp.set_segments([hun, ten, one, F])
+        temp_led.brightness=0
+        temp_led.set_segments([hun, ten, one, F])
 
 
 #####
@@ -250,15 +250,15 @@
 
 # Update the display with elapsed time
 
-def show_elapsed(display_time, elapsed):
+def show_elapsed(time_led, elapsed):
 
     min = elapsed // 60
     sec = elapsed % 60
-    d0 = display_time.digit_to_segment[min // 10]
-    d1 = display_time.digit_to_segment[min % 10]
-    d2 = display_time.digit_to_segment[sec // 10]
-    d3 = display_time.digit_to_segment[sec % 10]
-    display_time.set_segments([d0, 0x80 + d1, d2, d3])
+    d0 = time_led.digit_to_segment[min // 10]
+    d1 = time_led.digit_to_segment[min % 10]
+    d2 = time_led.digit_to_segment[sec // 10]
+    d3 = time_led.digit_to_segment[sec % 10]
+    time_led.set_segments([d0, 0x80 + d1, d2, d3])
 
 
 #####
@@ -289,8 +289,8 @@
     if CURRENT_PROFILE == FILM:
         DIM_BY = 2
 
-    display_time = TM1637(TIME_CLK, TIME_DIO, TIME_BRIGHT-DIM_BY)
-    display_temp = TM1637(TEMP_CLK, TEMP_DIO, TEMP_BRIGHT-DIM_BY)
+    time_led = TM1637(TIME_CLK, TIME_DIO, TIME_BRIGHT-DIM_BY)
+    temp_led = TM1637(TEMP_CLK, TEMP_DIO, TEMP_BRIGHT-DIM_BY)
 
     # Start measuring temperature
 
@@ -318,7 +318,7 @@
 
         # Update the time display
 
-        Thread(name="Timer", target=show_elapsed, args=(display_time, elapsed_time)).start()
+        Thread(name="Timer", target=show_elapsed, args=(time_led, elapsed_time)).start()
 
         # For temperatures in-range, look up the compensating factor