Liquid crystal cells – elements and systems – Particular structure – Interconnection of plural cells in series
Patent
1995-10-19
1998-08-25
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Interconnection of plural cells in series
349 23, G02F 11347, G02F 1133
Patent
active
057988072
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a method and a device for the modulation of images for displaying optical effects using radiation which originates from a light source and is polarized via a polarizer connected as an analyzer, and a translucent object which is arranged in the beam path between the polarizer and the analyzer.
SUMMARY OF THE INVENTION
The object of the invention is to produce dynamic images whose structure (local frequency) and, if required, color (chromaticity) are modulated and controlled by various audio-frequency signal sources. These images can either be displayed on a screen as a projection, for example with the aid of projection optics (for example a slide projector, overhead projector or the like) or else can be viewed in direct transmitted light (for example as in the case of a slide viewer). In addition, the method is also intended to make stereo projection and stereo viewing possible.
An optical element of this invention advantageously comprises an optically rotating liquid crystal, it being possible to influence the polarization behavior of the optical element by means of electrical, magnetic or mechanical influence. It is also conceivable for the element to be produced from a nematic liquid having chiral dopants, it either being possible to move the liquid or to apply sound or ultrasound to it. The latter has the advantage that the standing sound waves can additionally be made visible in a simple manner. It is also possible to apply changing or locally different temperatures to the liquid, as a result of which an image change in the sense of the invention is likewise obtained.
It is advantageous if a collimator and a heat protection filter are inserted in the beam path if it is intended to transmit relatively high light intensities. Imaging or viewing optics for specific applications are also advantageous.
There are a wide range of application possibilities for the method according to the invention and for a device operating in accordance with the method according to the invention; for example they can be used in illumination technology, to be precise advantageously in the case of audio-modulated or signal-modulated complex color and image dynamics. The introduction of the elements quoted above makes it possible to stage very highly complex color and light dramatic effects. It is thus possible to store complete stage-light scene effects on a small number of elements according to the invention, and to make these effects dynamic my means of signal sources.
The advantage over conventional lighting and light technology using lamp light is, inter alia, that new, complex lighting tasks can be solved in a versatile manner at an extremely low cost by means of the light dramatic effect which is stored in the elements.
The invention furthermore also offers a capability in opto-acoustic stimulation technology (OAS) (so-called MIND machines). Specific consciousness and relaxation states can be triggered using the previous OAS. In the past, this has been done only using monochromatic light from light-emitting diodes which are driven in a specific relationship with respect to the audio signal. This invention allows, for example, the audio signals of the OAS systems to be visualized in a new manner, using transmitted light, with the described stereo 3D glasses. Three-dimensional meditational color areas are produced, having new mental and aesthetic effects.
Further advantageous applications can be seen in that, for example, glass-clear sheets can be used as information carriers so that they are visible only to those who are wearing appropriate filter glasses, for example an analyzer. This technology can also advantageously be used in the case of credit cards, it being possible to recognize and record data in a simple and rapid manner. Furthermore, this technology is also of interest for an LC display which is appropriately prepared. The advantage is that the information which appears on the display is perceived only by the observer using an analyzer and not by other people w
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Nguyen Tiep H.
Sikes William L.
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