Diffuser plate, designing method of diffuser plate, manufacturing method of diffuser plate, display device, projection device, and lighting device

• Main Authors: Hanashima, Naoki, Shibuya, Kazuyuki, Matsuno, Yusuke, Takada, Akio
• Format: Patent
• Language: English
• Published: 28.02.2023
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CINEMATOGRAPHY; ELECTROGRAPHY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; HOLOGRAPHY; LIGHTING; MECHANICAL ENGINEERING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

There is provided a method to manufacture a diffuser plate with better productivity and exhibiting an excellent diffusion property and having excellent durability with respect to light having large coherence, the microlens array diffuser plate including: a microlens group positioned on a surface of a transparent substrate. The diffuser plate includes two or more unit cells that are continuously set in array, the unit cell includes a plurality of microlenses positioned on the surface of the transparent substrate, and ridge lines between the microlenses adjacent to each other are nonparallel to each other, and are nonparallel to the transparent substrate.