摘要:
Luminescent quartz glass comprising as a glass matrix oxide mainly SiO.sub.2 and furthermore per mole of SiO.sub.2 from 0 to 0.15 mol of at least one of the oxides Al.sub.2 O.sub.3, B.sub.2 O.sub.3, P.sub.2 O.sub.5, ZrO.sub.2, Sc.sub.2 O.sub.3, Y.sub.2 O.sub.3, La.sub.2 O.sub.3, Gd.sub.2 O.sub.3, Lu.sub.2 O.sub.3, the alkali metal oxides and the alkaline earth metal oxides. The glass comprises as an activator oxide at least one of the oxides Tb.sub.2 O.sub.3 and Ce.sub.2 O.sub.3 in a quantity of 0.75 to 15 mol % calculated with respect to the glass matrix oxides. In one embodiment the glass comprises Tb.sub.2 O.sub.3 and also not more than 0.2 mol % of Eu.sub.2 O.sub.3 as an activator oxide. The glasses are preferably obtained by a sol-gel technique and are useful, for example, in luminescent screen of low-pressure mercury vapor discharge lamps.
摘要:
Luminescent alumino-silicate and/or alumino-borate glass comprising lanthanum and/or gadolinium and activated by Tb.sup.3+ and/or Ce.sup.3+ and have a composition comprising 35-85 mol % of SiO.sub.2 and/or B.sub.2 O.sub.3, 1-35 mol % of La.sub.2 O.sub.3 and/or Gd.sub.2 O.sub.3, 5-45 mol % of Al.sub.2 O.sub.3 and 0.5-30 mol % of Tb.sub.2 O.sub.3 and/or Ce.sub.2 O.sub.3. The La.sub.2 O.sub.3 and/or Gd.sub.2 O.sub.3 may be replaced up to not more than 50 mol % by Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, Lu.sub.2 O.sub.3, ZrO.sub.2, P.sub.2 O.sub.5 and/or alkaline earth metal oxides. The glass can be used in a luminescent screen, for example, of a low-pressure mercury vapour discharge lamp.
摘要:
An image display apparatus (100) comprises: a display device (104) for displaying an image 900 by emission of display light (210) in a first direction; a scattering layer (902) disposed in front of the display device (104), for scattering at least a portion of ambient light (208); a transparent plate-shaped light source (950), arranged parallel to the scattering layer (902) and being optically coupled to the scattering layer (902). The plate-shaped light source (950) may be a passive light source, in which case at least one light source (967) is arranged along an edge of the plate-shaped light source (950). When the display device (104) is ON, the scattering layer (902) and the plate-shaped light source (950) are transparent. When the display device (104) is OFF, the scattering layer (902) is scattering and the plate-shaped light source (950) is ON.
摘要:
An appearance-modifying device (10; 30), for modifying the visual appearance of a surface covered thereby, comprising: first (11) and second (12) oppositely arranged optically transparent substrates; a spacer structure (13; 32) spacing apart en the first (11) and second (12) substrates in such a way that a space between the first (11) and second (12) substrates is divided into a plurality of cells (15, 16; 31a-c). The appearance-modifying device further has, in each cell (15, 16; 31a-c), an optically transparent fluid (19) having a plurality of particles (20) dispersed therein, the particles being moveable in the fluid (19) through application of an electric field; and first (17a, 18a; 33) and second (17b, 18b; 32) electrodes arranged to simultaneously, by application of a voltage across the electrodes, control a distribution of the particles (20) within each of a plurality of the cells (15, 16; 31a-c) from a first, dispersed state in which an appearance of the surface covered by the appearance-modifying device is determined by optical properties of the particles (20), to a second state in which the particles (20) are concentrated adjacent to at least one of the first (17a, 18a; 33) and second (17b, 18b; 32) electrodes in such a way that the appearance-modifying device (10; 30) becomes optically transparent.
摘要:
In a plasma display or a field emission display, sub-pixels having extra (non-saturating) phosphors are applied to enhance the efficacy. Depending on the luminance and color of a pixel to be displayed, driving of the most efficient combination of sub-pixels is performed.
摘要:
A light-emitting device (100) is disclosed. The light-emitting device (100) comprises a plurality of light-emitting elements (135) or light sources and a power module (120) adapted to selectively convey, supply or provide electrical power to the light-emitting elements (135). The power module (120) may be dimensioned such as to be able to power only a proper subset of the light-emitting elements (135) of the light-emitting device (100) at a given time, the subset having a maximum number of light-emitting elements (135) included therein with respect to the number of light-emitting elements (135) included in the all subsets of the light-emitting elements (135) of the light-emitting device (100). The plurality of sets of light-emitting elements (135) maybe arranged so as to emit light over a light emission area, and the plurality of sets of light-emitting elements (135) may be arranged relatively to each other such that different sets of light-emitting elements (135) emit light over different portions of the light emission area.
摘要:
A display device which is based on a number of pixels (2) which are arranged in rows and columns, each pixel having a two-pole switching element (3) between an electrode (13) of a pixel and a row electrode (5), and a second two-pole switching element (23) between said electrode of the pixel and an auxiliary row electrode (25) used for resetting, auxiliary row electrodes for resetting having a common connection (24) for a plurality of rows of pixels.
摘要:
A method of biostimulating phototherapy is provided. The method comprises illuminating a subject's body portion (1) with light having a first wavelength in the range of 600-900 nm (17) and reducing and preventing hyperthermia of the body portion by illuminating the body portion with light having a second wavelength which is at least one of in the range of 400-600 nm and in the range of 900-2500 nm (19). Further, a phototherapy device (21) is provided which comprises a first light source (25) and a second light source (26). The first light source is configured to emit light (17) having a first wavelength which is in the range of 600-900 nm. The second light source is configured to emit light (19) having a second wavelength which is at least one of in the range of 400-600 nm and in the range of 900-2500 nm.
摘要:
An image display apparatus including a display device for displaying an image by emission of display light in a first direction; a scattering layer disposed in front of the display device, for scattering at least a portion of ambient light; a transparent plate-shaped light source, arranged parallel to the scattering layer and being optically coupled to the scattering layer. The plate-shaped light source may be a passive light source, in which case at least one light source is arranged along an edge of the plate-shaped light source. When the display device is ON, the scattering layer and the plate-shaped light source are transparent. When the display device is OFF, the scattering layer is scattering and the plate-shaped light source is ON.
摘要:
It is disclosed an appearance-modifying device (10), for modifying the visual appearance of a surface covered thereby. The appearance-modifying device (10) comprises two oppositely arranged substrates (11, 12), which are spaced apart by a spacer structure (13). The spacer structure (13) spaces apart the two substrates (11, 12) in such a way that a space between the two substrates (11, 12) is divided into a plurality of cells (15, 16), the shapes of the individual cells (15, 16) being such that an aperiodic cell pattern (14) is formed by the cells (15, 16). Each cell (15, 16) may comprise an optically transparent fluid having a plurality of particles dispersed therein. The particles are moveable in the fluid through application of an electric field. An appliance at least partly covered by the appearance-modifying device (10) is also disclosed. Furthermore, it is disclosed a method for manufacturing the appearance-modifying device.