Abstract: An eyewear hinge device may include a first assembly having a first and second pin bridge which may both be coupled to a first object. A friction plate may be coupled to the first object and positioned between the pin bridges, and the friction plate may extend toward the stop plate. A first channel may extend around the friction plate. The friction plate may comprise a friction pocket and a friction ridge. A second assembly having a first and second lock arm may be coupled to a second object. The first lock arm may have a first lock pin and a first arm extension, and the second lock arm may have a second lock pin and a second arm extension. The first assembly may be movably coupled to the second assembly by positioning the first lock pin in the first pin aperture and the second lock pin in the second pin aperture.

Abstract: The present invention provides a method for manufacturing a mold assembly of multi-functional light guide plate, which firstly forming a first photoresist layer with a light scattering pattern and forming a second photoresist layer with a light scattering pattern. After the processes of forming a conductive layer, electroforming a conductive mold, and separating a male mold from the conductive mold, a first male mold has a pattern corresponding to the light guiding pattern and a second male mold also has a pattern corresponding to the light scattering pattern. Besides, the present invention also provides a method for manufacturing a multi-functional light guide plate by using two of the mold assembly of the present invention. Because the produced multi-functional light guide plate has the advantages of high transmittancy, the multiple optical sheets in conventional display device can be replaced by the multi-functional light guide plate of the present invention.