Jacobson, Price, Holman & Stern
Two-purpose LCD device with scrollable reflecting screen and scrollable diffusing screen
 A liquid crystal display device including a frame, a liquid crystal module and a back light module mounted within the frame, and a transparent backing covered on the frame over the back light module, the back light module consisting of a diffusion scroll, a reflecting scroll, and a photo conductive plate disposed between the diffusion scroll and the reflecting scroll, the diffusion scroll including a diffusion screen and a transparent screen connected in series, the reflecting scroll including an opaque reflecting screen and a transparent screen, the frame having rotary knobs turned to rotate the diffusion scroll and the reflecting scroll, permitting the diffusion screen and the opaque reflecting screen to be aligned with the liquid crystal module for image displays, or permitting the transparent screens to be aligned with the liquid crystal module for slide projections. 
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Hung-wen
Chen