Patent ID: 8284331

Claim:
A dual-purpose projective display, comprising: a transparent liquid crystal display assembly, which is divided into a front side and a rear side; a light-emitting device fixedly positioned on the front side of the liquid crystal display assembly, which emits a light to the front side of the liquid crystal display assembly; and a backlight module, which is movably connected at the rear side of the liquid crystal display assembly, for providing a surface light source the backlight module deposited at a middle segment in company with the liquid crystal display assembly, and at least two included angles alternatively formed between a front of the backlight module and the rear side of the liquid crystal display assembly, the two included angles defined as a first included angle and a second included angle respectively, when the backlight module is aligned with the liquid crystal display assembly, the first included angle θ 1 is 0° with the front of the backlight module facing the rear side of the liquid crystal display, and the liquid crystal display assembly functions as an ordinary display screen; when the image provided by the liquid crystal display assembly is to be projected and magnified onto a projection surface, the backlight module is moved with respect to the liquid crystal display assembly such that the second included angle θ 2 is greater than 90°, and the light-emitting device emits the light, a lens assembly deposited in front of a plurality of light-emitting diodes of the light-emitting device can integrate lights from the light-emitting diodes into a dot light source, then the dot light source can pierce through the liquid crystal display assembly to project the image presented on the liquid crystal display assembly on to the projection surface so as to achieve the effect of magnifying the image.