Diffusion plate with enhanced durability and backlight device comprising the same, and liquid crystal display device

The present invention has been made to be durable to an improved light diffusion plate, a backlight device and a liquid crystal display device including the same, is more specifically configured for engagement with the upper substrate and the lower pattern is lower pattern formed bonding the lower substrate upper pattern formed It relates to a light diffuser plate comprising a base plate. The light diffusion plate according to the invention mechanical properties, thermal properties, such as durability, warpage compared to conventional diffuser plate by a pattern portion of the interior light diffuser reduces the external force as is applied an external force (external force) in a vertical direction and , optical diffusion effect can be enhanced at the same time. The light diffusion plate, a direct backlight pattern durability