Display device

A display device comprising:

• a display panel displaying an image;
• a light guide overlapping with the display panel and including a first side surface;
• and
• a light source emitting light to the first side surface, wherein
• the light guide includes a first transparent substrate, a second transparent substrate provided between the display panel and the first transparent substrate, and a first adhesive layer bonding the first transparent substrate to the second transparent substrate,
• a thickness of the second transparent substrate is different from a thickness of the first transparent substrate,
• the second transparent substrate includes a first main surface opposed to the display panel, a second side surface connected to the first main surface, and a third side surface on a side opposite to the second side surface,
• the light guide further comprises a low-refractive layer formed on the first main surface and having a refractive index lower than a refractive index of the second transparent substrate,
• the second side surface is included in the first side surface,
• the low-refractive layer extends in a first direction from the second side surface toward the third side surface and includes a plurality of band portions spaced apart in a second direction orthogonal to the first direction, and
• a length of the band portion in the second side surface side along the second direction is greater than a length of the band portion in the third side surface side along the second direction.