Displays Laser addressed

PROJECTION STORAGE DISPLAYS USING LASER-ADDRESSED SMECTIC LIQUID CRYSTALS... 

D. Maydan, H. Melchior and F. Kahn, Liquid Crystal Graphic Displays Thermally Addressed by Infrared Laser Beams, IEEE Conference Record of 1972 Conference on Display Devices,... 

D. Maydan, Infrared Laser Addressing of Media for Recording and Displaying of High-Resolution Graphic Information, Proc. IEEE 61 1007 (1973). 

F. J. Kahn, IR-Laser-Addressed Thermo Optic Smectic Liquid-Crystal Storage Displays, Appl. Phys. Letters 22 111... 

A. G. Dewey, J. T. Jacobs and B. G. Huth, Laser-Addressed Liquid Crystal Projection Displays, Proc. SID, Vol. 19/1,... 

Portions ofthis section are based on Phillips,T.E.etal. 1992.1280 x 1024 video rate laser-addressed liquid crystal light valve color projection display. Optical Engineering 31(11) 2300-2312. 

FIGURE 7.39 Block diagram of a color laser-addressed light valve display system. 

Figure 4. Typical transmission projection system used for laser-addressed displays [35, 46].

HATn materials, electrical properties 782 ff He-Ne laser addressed devices 478 head-tail equivalence, antiferroelectrics 665 f heal capacity, OCB 450 Heck coupling, hydrocarbon cores 707 Heilmeier displays... 

Fig. 6.26 The operation principles of laser addressed display used the thermo-optic and the electro-thermo-optic effects [92], In the figure, the operation by a nematic LC can be expected same by a smectic LC. The LC cell used as a light valve can be applied to a large-scale projection display...

Fig. 6.29 The example of the large-scale display by a laser addressed projection system. The figure shows the power control system board (Courtesy of Hitachi)...

Liquid crystal polymers are also used in electrooptic displays. Side-chain polymers are quite suitable for this purpose, but usually involve much larger elastic and viscous constants, which slow the response of the device (33). The chiral smectic C phase is perhaps best suited for a polymer field effect device. The abiHty to attach dichroic or fluorescent dyes as a proportion of the side groups opens the door to appHcations not easily achieved with low molecular weight Hquid crystals. Polymers with smectic phases have also been used to create laser writable devices (30). The laser can address areas a few micrometers wide, changing a clear state to a strong scattering state or vice versa. Future uses of Hquid crystal polymers may include data storage devices. Polymers with nonlinear optical properties may also become important for device appHcations. 

In this paper a laser beam addressed liquid-crystal light valve is described. Its writing speed is limited by the available laser power and by the laser scanning system, but it does have selective erase capability. This feature, which allows local erase and update of information on the screen, is important in large storage displays and is not available with present storage CRT s. 

M. Hareng and S. Le Berre, Formation of Synthetic Images on a Laser-Beam-Addressed Smectic Liquid-Crystal Display, Elec. Letters 11 73 (1975). 

---