Electroluminescence (EL) lights

1
Electroluminescence (EL) lights

• EL displays are
• Thin
• Flexible
• Bright
• Effective
• Maintenance free
• Shock-proof
• Vibration resistant
• No heat generation

2
Introduction to Electroluminescence

• EL was invented already 1930s
• First commercial applications 1990
• Today widley used for back light applications
• Defintion Conversion of electrical potential
  fluctuation into light without heating

3
How does EL ligth work

• ELDs are quite similar to capacitors except for
  the light emitting layer.
• ELD is a "lossy capacitor" in that it becomes
  electrically charged and then loses its energy in
  the form of light. (Excited electrons emit light
  when recombining with the holes)
• The insulator layers are necessary to prevent
  arcing between the two conductive layers.
• An alternating current (AC) is generally used to
  drive an ELD because the light generated by the
  current decays when a constant voltage is applied

4
Applicaitons

• Novel screen printed El displays with special
  encapsulated zinc sulfide pigments are excited
  with AC voltage and emit light
• Power consumption is minimal no heat COLD
  light
• Typical applications include
• Interior lightings and back lights
• Advertising displays

5
Complete set of inks for EL display

• Complete set of inks for the EL display
• Back Electrode Panipol R EL 5800
• Dielectric paste Panipol R EL 5500
• Light Emitting Pigment Panipol R EL 5400
• Front electrode is either ITO coated substrate or
  if small area device polyaniline back and front
  electrodes can be used
• Pani addition in EL 5800 back electrode stops
  silver migrations and gives 20 better
  brightness and lifetime
• All the layers are based on same binder system -gt
  fully compatible

Manufacturer of the inks Ormecon Germany
6
Complete EL systems avaible

• The electronic controllers can be supplied with
  the inks.
• Controllers may be programmed ready to show any
  desired animation
• Small scale manufacturing and prototyping
  available
• All the inks can be tailored according to
  customers manufacturing process if needed