A light emitting emblem includes: a board; a light source arranged at the board; a light guide plate having a second peripheral edge and an inner side portion, the second peripheral edge having a first surface facing the light source and a second surface opposite to the first surface, the first surface including a light entering part into which light from the light source is incident, and the second surface including an inclination part through which the light incident into the light entering part is reflected to the inner side portion from the second peripheral edge; and a shielding plate that shields the light from the light source and prevents light not incident from the light entering part from being incident into the inner side portion, wherein the inclination part is positioned at an outer edge of the light emitting emblem from the shielding plate.

A light guide body rotates integrally with an operation knob, has an incident surface that is a concavely curved surface recessed to a side opposite to a light source side, and rotates about a rotation shaft located so as to intersect the incident surface of the light guide body. The incident surface of the light guide body is a concavely curved surface recessed toward the side opposite to the light source (toward a Z1 direction) on a cross-section taken along an X-Z plane.

A backlight device 12 includes at least: a plurality of LEDs 17 arranged in an annular and curved shape; a light guide plate 14 surrounded by the plurality of LEDs 17 having am outer shape along the arrangement of the plurality of LEDs 17, and guiding light from the plurality of LEDs 17; and an LED board (light source board) 18 on which the plurality of LEDs 17 are mounted and wiring portions 18c for feeding power to the plurality of LEDs 17 are formed. The LED board 18 extends along the arrangement of the plurality of LEDs 17, and has a terminated annular shape or an endless annular shape, and includes a no-wiring formed region NWA in a part with respect to the circumferential direction thereof, where the wiring portions 18c are not formed.

A vehicular lamp includes a light source; and a light guide disposed such that light emitted from the light source is incident on an end face of the light guide. The light guide emits light, guided into its interior, heading vehicle-forward from an exit face of the light guide running along the light guide's lengthwise extension. The light guide includes reflection steps formed on a surface of the light guide on a side reverse from the exit face, for reflecting light guided into the light-guide interior toward the exit face; and a plurality of diffusion flutes formed on said end face, each being arcuate in substantially horizontal cross-section through said end face, and each being of constant form in substantially perpendicular extension.

According to one aspect, an optical waveguide comprises a plurality of coupling cavities for directing light into a waveguide body spaced from a particular point. Further, each of the coupling cavities comprises a dimension that varies with distance from the particular point.

A light guide plate, a backlight module and a display device are provided. The light guide plate includes a main body, plural first stripe structures and plural second stripe structures. The main body has at least one light-incident surface and a main surface connected to the at least one light-incident surface. The first stripe structures are arranged on plural first regions of the main surface, in which each of the first stripe structures has a first tapered portion. The second stripe structures are arranged on a plurality of second regions of the main surface, in which each of the second stripe structures has a second tapered portion. The first areas and the second areas of the main surface are alternately disposed, and an inherent type of the second stripe structures is different from an inherent type of the first stripe structures.

The holder is suitable for a display apparatus, where the display apparatus includes a light guide plate and a display panel. The light guide plate includes a light emitting portion and a curved portion connected to the light emitting portion, and the display panel has a bottom surface and a side surface connected to the bottom surface. At least one part of the holder is attached to the side surface of the display panel, and the holder is wrapped with the curved portion of the light guide plate.

A light guide plate, a backlight module and a display device in the field of display technology are provided. The light guide plate includes a light guide plate body and a prism structure located at at least one end of the light guide plate body. The prism structure includes a light incident surface and at least one reflective surface, and incident light from the light incident surface is can be reflected by the at least one reflective surface into the light guide plate body.

A light guide plate has a light input end surface from which light is introduced, a light output surface that outputs light spread in a planar manner externally, a flat main light guiding body including the light output surface, a light conducting portion that has a maximum thickness greater than the thickness of the main light guiding body and includes the light input end surface, a first slanted surface provided on the light conducting portion on at least one of a surface near the light output surface and a surface opposite thereto, the first slanted surface inclined from a first location that is thicker than the main light guiding body toward the outer surface of the main light guiding body, and a plurality of first pattern elements provided on the light conducting portion on at least one of a surface near the light output surface and a surface opposite thereto.

A lightguide includes: a coupling structure (32) having a light receiving surface receiving light from a display element (10); and a light guide plate (30) having a light receiving section at which light from the coupling structure enters, the light guide plate (30) including a plurality of reflecting sections (34A) arranged so as to reflect light entering from the light receiving section (30B) and traveling through an inside of the light guide plate mainly in a first direction, the light guide plate being configured such that the light reflected by the plurality of reflecting sections outgoes from an exit surface, wherein each of the plurality of reflecting sections has a reflecting surface which is oblique to the exit surface, and when seen in a normal direction of the exit surface, the area ratio per unit area of the oblique reflecting surface varies depending on a distance from the light receiving section.