Light emitting diodes (LEDs); organic light emitting diodes (OLED); OLED (Organic light emitting diode) display panels; illuminated exit signs; illuminated signs, being luminous signs; illuminated signs, being electronic signs; illuminated signs, being backlit signs; electronic illuminated signs; illuminated electronic signs being signaling devices; digital signs; digital signage display panels; digital signage monitors; illumination regulators; electronic machines, apparatus and their parts,...