Patent ID: 11867902
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  B  F | IPC B  F  G

Claim 13:
14. A display device comprising:
a light source that emits light;
a display panel that displays an image; and
a light guide panel that guides light emitted from the light source to the display panel, wherein
the light guide panel includes an incident surface facing the light source, an emission surface facing the display panel, a first reflective surface facing the incident surface, and a second reflective surface facing the emission surface,
the first reflective surface has a concave shape that reflects light so that reflected light becomes closer to parallel light when viewed in a facing direction of the display panel and the light guide panel in the light guide panel, is tilted at an angle larger than 0 degrees with respect to the incident surface, and intersects the second reflective surface at an angle smaller than 90 degrees,
a cylindrical lens is provided on the incident surface facing the light sources and distributes, at a narrow angle, light emitted from the light source when viewed in the facing direction, and
a pair of prisms are arranged so as to sandwich the cylindrical lens and have a light intake surface through which light emitted from the light source is taken into the light guide panel.