Abstract: A substrate carrying a mixed organic conductive polymer coating, has a high index of refraction. On a substrate having SiO2 as a major component, the coating comprises two layers each having SiO2 as a major component. One of the layers comprises a conducting polymer, the other a material having a high index of refraction.

Abstract: A cathode ray tube (1) comprises an electrically conductive layer (10) shielding against alternating electric fields produced by the deflection unit (5). The electrically conductive layer (10), including an electrically conductive polymer, is provided on at least a part of the funnel portion (6) of the tube (1). The electrically conductive polymer is preferably chosen from the group of polythiophenes. Good results were obtained with a layer comprising poly-3,4-ethylene dioxythiophene. Application of this compound prevents the occurrence of damage to the tube by arcing phenomena and thus reduces the necessity of an insulating film between the tube (1) and the deflection unit (5).

Abstract: Substrate carrying a mixed organic conductive polymer/transparent metal oxide coating having a thickness between 100 and 600 nm. The conductive polymer polyethylene-dioxythiophene (PEDOT) is an interesting material to reduce the alternating electric field (AEF) emitted at the front of a colour monitor tube. The processing of the PEDOT is based on chemical polymerisation of ethylenedioxy-thiophene (EDOT) and Fe(III) toluene sulphonate on a face plate of the tube. After the polymerisation is completed, the Fe salt is extracted from the coating by rinsing with an ethanolic solution. If TEOS is used, a hybrid PEDOT/SiO2 film is formed. The specific conductivity is 120 S/cm and the average transmission (380-780 nm) 80% for a layer thickness of about 300 nm.

Abstract: A substrate carrying a mixed organic conductive polymer coating, has a high index of refraction. On a substrate having SiO2 as a major component, the coating comprises two layers each having SiO2 as a major component. One of the layers comprises a conducting polymer, the other a material having a high index of refraction.

Abstract: The display screen 3 of a cathode ray tube 1 is provided with an antistatic, light-absorbing coating 8 which consists of ATO (Sb:SnO2) particles and polypyrrole particles. The coating may be provided with additional layers of silicon dioxide to obtain an antireflective and antiglare effect.

Abstract: The display screen (3) of a cathode ray tube (1) is provided with an antistatic coating (8) which comprises conductive, for example ATO (Sb:SnO.sub.2) particles. The coating comprises at least one additional layer (10) of silicon dioxide to obtain an antireflective effect.

Abstract: Method of manufacturing a coating on a display screen and a display device comprising a display screen having a coating.The display screen 3 of a cathode ray tube 1 is provided with an antistatic coating 8 which comprises conductive, for example ATO (Sb:SnO.sub.2) particles. The coating comprises at least one additional layer (10) of silicon dioxide to obtain an antireflective effect.

Abstract: The display screen 3 of a cathode ray tube 1 is provided with an electroconductive coating 8 of poly-3,4-ethylene dioxythiophene. The layer 8 has a sheet resistance of 1 k.OMEGA./.quadrature. and a high transmission. The layer 8 provides an effective shield against electromagnetic radiation. The coating can be provided with additional layers of, for example, silicon dioxide to improve the mechanical properties.