Abstract:
Low pressure discharge lamp comprises a gas discharge vessel containing a noble gas filling as buffer gas and an indium halide, thallium halide and/or copper halide, electrodes and devices for producing and maintaining a low pressure gas discharge. The lamp further includes an electron emitter substance made from a mixture of BaO, SrO, CaO and MgO, in which the BaO is present in an amount of less than 1 weight %, SrO in an amount of less than 10 weight % and the sum of CaO and MgO is more than 90 weight %, where the amount of CaO in the CaO/MgO mixture is 10-90 weight %.
Abstract:
Low pressure discharge lamp comprises a gas discharge vessel containing a noble gas filling as buffer gas and an indium halide, thallium halide and/or copper halide, electrodes and devices for producing and maintaining a low pressure gas discharge. The lamp further includes an electron emitter substance made from a compound selected from ABO3, AnC2O5+n or AnD2O3+n (where, A = alkaline earth element(s); B = Ce, Ti, Zr and/or Hf; D = V, Nb and/or Ta; and D = Sc, Y and/or La).
Abstract:
Fuente (1) de luz que comprende al menos un dispositivo (2) emisor de luz que puede emitir radiación electromagnética en el intervalo desde el ultravioleta cercano hasta el azul en respuesta a una señal de excitación de un medio (6) de excitación y una cubierta (3) luminiscente para convertir dicha radiación electromagnética en luz visible, caracterizada porque la cubierta luminiscente comprende al menos un primer activador (A1) y un segundo activador (A2), en la que dicho primer activador y dicho segundo activador tienen diferentes características de respuesta y dicho medio de excitación está adaptado para variar dicha señal de excitación para controlar el espectro (Sptotal(λ)) de dicha luz visible para dicha fuente de luz.
Abstract:
Low pressure discharge lamp comprises a gas discharge vessel containing a noble gas filling as buffer gas, and electrodes and devices for producing and maintaining a low pressure gas discharge. The lamp further includes at least one zinc halide.
Abstract:
The invention relates to a lamp system having-a gas-discharge lamp with a color point in the green-blue,-an LED with a color point in the yellow-red, and-an optical component for additive mixing of the light from the gas-discharge lamp and the LED, and to a corresponding method of illumination. A blue and green emitting fluorescent lamp is particularly suitable as gas-discharge lamp, and a red-yellow-emitting AlGaInP LED or a red-emitting AlGaAs LED as LED. Through additive mixing of the light from these high-efficiency light sources, the invention provides a highly efficient light source affording good color rendering, which contains all three primary colors and is particularly suited to the highly efficient generation of white light.
Abstract:
The invention relates to a high-pressure discharge lamp with a discharge vessel having a filling comprising a rare gas, for example argon, mercury, and chlorine, wherein the filling quantities of mercury [Hg] and chlorine [Cl] comply with the following conditions: [Hg].[Cl]>=200 (mumole/cm 3 ) 2 , [Cl] 3 . The condition [Hg].[Cl]>=200 (mumole/cm 3 ) 2 achieves HgCl vapor pressures in the discharge sufficient for generating significant radiation components of the B 2 Sigma + -X 2 Sigma + band system of this molecule. The condition [Cl] 3 serves to limit the chemical aggressiveness of the chlorine filling, in particular to limit the attacks on the wall and electrodes and thus to achieve longer lamp lives. The addition of chlorine-binding metals, in particular of germanium, leads to a further improvement in the radiation and life properties of the lamp.
Abstract:
A low-pressure gas discharge lamp provided with a gas discharge vesseL (1) containing a gas filling with a metal chelate complex (ML2) of a central metal ion and at least one bivalent or multivalent ligand and with a buffer gas, with internal or external electrodes (2), and with means for generating and maintaining a low-pressure gas discharge.
Abstract:
The invention relates to a low-pressure gas discharge lamp comprising a gas discharge vessel with means for generating and maintaining a low-pressure gas discharge. It is an object of the invention to improve the luminous efficacy of a low- pressure gas discharge lamp containing a gas filling with an indium compound. According to the invention this is achieved by a low-pressure gas discharge lamp where less luminescence processes are employed. The low-pressure gas discharge lamp comprises a gas discharge vessel containing a gas filling on the basis of an indium halide InX, where X = F, Cl, Br, I, or a mixture of several indium halides. As a characteristic feature the gas filling includes additionally a sodium halide NaX, where X = F, Cl, Br, I, or a mixture of several sodium halides. The additional component consisting of one or more sodium halides emits light in the range of 590 nanometers. Use of a red phosphor in order to gain white light is superfluous then. The gas discharge emits light with a wavelength of 451 nanometers, blue and green light of one or more phosphors converting the UV radiation and light with a wavelength of 590 nanometers.