Abstract:
Device for producing images and/or projections has a unit for acquiring starting radiation (2) having an acquisition element (3) containing a sensor with a Pr3+ -activated scintillator for converting the radiation into UV radiation, and a photodiode for converting an optical signal into an electrical signal.
Abstract:
A device for generating ultraviolet radiation by an excimer discharge is equipped with an at least partly UV-transparent discharge vessel whose discharge space is filled with a gas filling. The device includes electrodes for triggering and maintaining the excimer discharge in the discharge space. The device further has a coating that contains a phosphor including a host lattice and neodymium(III) as an activator.
Abstract:
The invention relates to a plasma display screen comprising a carrier plate, a transparent front plate, a ribbed structure which divides the space between the carrier plate and the front plate into plasma cells that are filled with a gas, one or more electrode arrays to generate corona discharges in the plasma cells, and a phosphor layer which comprises a phosphor selected from the group composed of doped terbium(III)-activated phosphors of the general formula (In 1-x-y-z Gd y Y z )BO 3 :Tb x , where 0 0. The invention also relates to a phosphor selected from the group composed of doped terbium(III)-activated phosphors of the general formula (In 1-x-y-z Gd y Y z )BO 3 :Tb x , where 0 0.
Abstract:
The invention relates to a light emitting device (1) with high colour rendering comprising a wavelength converting member (2) with a luminescent medium for wavelength conversion of blue light and/or ultraviolet light (10) into red light and/or yellow and/or green light and a light source (3) emitting blue light (10) and/or ultraviolet light arranged to pump the luminescent medium, said luminescent medium essentially having a main phase of a solid state host material which is doped with Ce3+-ions. According to the invention the host material comprises ions of a further rare-earth material Ln, wherein the host material is selected such that the emission energy of the 5d-4f emission on Ce3+-ions is energetically higher than the absorption energy into an upper 4fn state of the further rare-earth material Ln, and wherein the light emission of wavelength converted light is caused by an intra-atomic 4fn- 4fn transition within the ions of the further rare-earth material. The invention further relates to a corresponding lighting system comprising the light-emitting device and a corresponding luminescent medium.
Abstract:
The invention relates to a light source (1) comprising at least one light emitting device (2) capable of emitting electromagnetic radiation in the range from near ultraviolet to blue in response to a driving signal of a driving means (6). A luminescent cover (3) comprises at least a first activator (A 1 ) and a second activator (A 2 ) to convert said electromagnetic radiation into visible light. The first activator and second activator have different response characteristics and the driving means (6) is adapted to vary said driving signal to control the spectrum of said visible light for said light source. Preferably, the driving signal is a pulsed driving signal and said driving means is adapted to vary the pulse width of said pulsed driving signal. Accordingly, the light source (1) has a dimming performance resembling that of an incandescent lamp.
Abstract translation:本发明涉及一种光源(1),其包括响应于驱动装置(6)的驱动信号,能够从近紫外至蓝色的范围内发射电磁辐射的至少一个发光装置(2)。 发光罩(3)至少包括第一激活剂(A SUB 1)和第二活化剂(A 2 N 2),以将所述电磁辐射转化成可见光。 第一激活器和第二激活器具有不同的响应特性,并且驱动装置(6)适于改变所述驱动信号以控制用于所述光源的所述可见光的光谱。 优选地,驱动信号是脉冲驱动信号,并且所述驱动装置适于改变所述脉冲驱动信号的脉冲宽度。 因此,光源(1)具有类似于白炽灯的调光性能。
Abstract:
The present invention relates to a LED comprising at least one red light emitting and/or conversion layer, which emits light in the wavelength of = 550 nm to = 750 nm, preferably = 630 nm to = 700 nm, and/or at least one blue light emitting layer, which emits light in the wavelength of = 400 nm to = 550 nm, preferably = 420 nm to = 500 nm, and/or at least one green and/or yellow emitting luminescence material, which emits light in the wavelength = 530 nm to = 610 nm, whereby the at least one green and/or yellow emitting luminescence material is capable of absorbing light which is emitted by the at least one blue light emitting layer, characterized in that the red light emitting and/or conversion layer is made of a semiconductor material.
Abstract:
An illumination system includes a radiation source and a fluorescent material including at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light. The phosphor includes a yellow red-emitting cerium-activated carbido-nitridosilicate of general formula (RE1-z)2-aEAaSi4N6+aC1-a:Cez where 0
Abstract:
A gas discharge lamp has a gas discharge vessel filled with a gas filling suitable for a gas discharge which emits VUV radiation, with a phosphor coating containing a downconversion phosphor. The downconversion phosphor has, in a host lattice, a pair of activators of a first lanthanoid ion and a second lanthanoid ion; a sensitizer selected from the group formed by the thallium(I) ion, lead(II) ion and bismuth(III) ion; and samarium(II) ion co-activator.