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专利名称：Optical device comprising an electro-optical
filter being automatically controlled as afunction of light reaching the same
发明人：DUMAS, JEAN-CLAUDE,SASSI,
HOCINE,REYMOND, JACQUES,SOTTON,ANDRE
申请号：EP00420012.7申请日：20000120公开号：EP111A1公开日：20010725
专利附图：
摘要：The device comprises a photo-sensor, an electronic circuit electricallyconnected to the photo-sensor and at least one electro-optical screen functioning inpositive mode and comprising an active zone linked by electrical connections to theoutput of electronic circuit. The photo-sensor is adapted to produce a signal of powerincreasing as a function of luminous intensity. The electronic circuit produces a secondaryalternating signal of power increasing with the power of the signal produced by thephoto-sensor, and contains means to vary the frequency of secondary signal in a mannerthat an increase in the luminous intensity is translated into a reduction in frequency. The
means are constituted by an oscillator controlled in frequency as a function of luminousintensity, and also in amplitude so that an increase in the luminous intensity is translatedinto an increase in amplitude. The means are constituted by a microcontroller which canensure the variation of frequency and also the variation of amplitude. The
microcontroller is associated with a control at a distance. The electronic circuit is power-supplied by at least one photovoltaic cell, and comprises a direct-current converterconnected between the photovoltaic cell and the oscillator. Thee electro-optical filterhas a curvature which is associated with a correction system. The device comprises severaloptical filters controlled independently and in a synchronous manner. The electroniccircuit is in four variants. In the second variant, the electronic circuit comprises anelectrical power supply in the form of a battery, a regulator, which is in particular avoltage stabilizer, a photo-sensor (82), and a voltage-frequency converter (85), which isconnected to the liquid-crystal layer of glasses.
申请人：DUMAS, JEAN-CLAUDE,SASSI, HOCINE,REYMOND, JACQUES,SOTTON, ANDRE
地址：Lotissement \"Le Joug\" 42170 Saint Just Saint Rambert FR,21 Hameau de laPierre 42160 Bonson FR,20B Rue de la République 42000 Saint Etienne FR,23 Rue AugusteGélin 42120 Le Côteau FR
国籍：FR,FR,FR,FR
代理机构：Thivillier, Patrick
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