Commissariat a L'energie Atomique Et Aux Energies Alternatives

Renault S.a.s.

Frédéric Sermet

Umberto Rossini

David Vaufrey

Anis Daami

Stéphane Getin

Marianne Consonni

Martin Pertenais

Stéphane Regnier

The invention relates to a directional lighting device () which comprises:

Directional lighting device

A rear-projection display device comprises a mobile light source supplying a light beam of at least one wavelength, a holographic mirror reflecting only said at least one wavelength, an absorbent screen and a transmissive diffuser, the absorbent screen being placed on the rear face of the holographic mirror, the elements being arranged such that the beam from the light source is reflected on the holographic mirror in order to sweep the surface of the transmissive diffuser.

Rear-projection display device

The invention provides an organic light-emitting diode which includes at least two electroluminescent layers (ELR, ELB), both of which are fluorescent or phosphorescent and emit at different wavelengths, as well as a hole- and electron-conducting buffer layer (T) arranged between the electroluminescent layers. The buffer layer is a bi-layer having an electron-transport layer (T2) and a hole-transport layer (T1), each one of the hole- and electron-transport layers being made of one or more materials in which the HOMO level(s) are comprised between or equal to the HOMO levels of the electroluminescent layers, and in which the LUMO levels are between or equal to the LUMO levels of said electroluminescent layers, with a tolerance of 0.3 eV.

Organic light-emitting diode comprising at least two electroluminescent layers

Growing community of inventors

Saint Jean de Moirans, France

Frédéric Sermet