According to one embodiment, a display device includes a light-guiding body, a light source, a wavelength selection transmission layer, and a light control layer. The light-guiding body has a first major surface, a second major surface opposite to the first major surface, and a side face connecting the first major surface and the second major surface. The wavelength selection transmission layer is provided on the second major surface. The first major surface has a plurality of concave portions having inclined faces inclined relative to the first major surface. A ratio of a total area of the plurality of the concave portions projected on the first major surface, relative to an area of the first major surface is 8% to 25%. The plurality of the concave portions is evenly provided in the first major surface.

Claims

21 · 2 independent · depth 3

21 granted claims

›1.independentA display device, comprising:na light-guiding body having a first major surface, a second major surface opposite to the first major surface, and a sid…+12

›2.↳ 1The device according to claim 1, wherein the inclined faces are provided non-perpendicular to the side face and each have a side parallel to the side …d2

›3.↳ 1The device according to claim 1, whereinnthe wavelength selection transmission layer has a structure in which a plurality of dielectric films having r…d2

›4.↳ 1The device according to claim 1, wherein angles of the inclined faces relative to the first major surface are 40° to 50°.d2

›5.↳ 1The device according to claim 1, wherein the concave portion has a form of a V-shaped groove.d2+2

›8.↳ 1The device according to claim 1, wherein the concave portion has a form of a four-sided pyramid groove.d2

›9.↳ 1The device according to claim 1, wherein the light-guiding body has at least any of:na first tapered portion inclined relative to the first major surf…d2+2

›12.↳ 1The device according to claim 1, further comprising a wavelength selection absorption layer provided on the light control layer, the wavelength select…d2

›21.↳ 1The device according to claim 1, wherein the first major surface is parallel to the second major surface and includes:nthe plurality of concave portio…d2

›13.independentA backlight for a display device, comprising:na light-guiding body having a first major surface, a second major surface opposite to the first major su…+7

›14.↳ 13The backlight according to claim 13, wherein the inclined faces are provided non-perpendicular to the first side face and each have a side parallel to…d2

›15.↳ 13The backlight according to claim 13, wherein angles of the inclined faces relative to the first major surface are 40° to 50°.d2

›16.↳ 13The backlight according to claim 13, wherein the concave portion has a form of a V-shaped groove.d2

›17.↳ 13The backlight according to claim 13, wherein the light-guiding body has at least any of:na first tapered portion inclined relative to the first major …d2+2

›20.↳ 13The backlight according to claim 13, whereinnthe light-guiding body further has a second side face opposite to the first side face and connected to th…d2

Classifications

6 codes

IPC · International Patent Classification

Section F — Mechanical engineering; lighting; heating; weapons

F21V8/00

Section G — Physics

G02F1/1335
G09F13/04

USPC · US Patent Classification

362/97.1362/624362/627

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Pendency

2.5 y

908 days filing → grant

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non-final + final

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no RCE

Examiner

Meghan Dunwiddie

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20130070482 A1	21 Mar 2013

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