US 10,310,173 B2Granted

Lighting device and display device

AssigneeSharp Kabushiki Kaisha

InventorHiromitsu Tsutsui

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Abstract

A backlight device includes LEDs, a unit body holding the LEDs, a light guide plate having a light entrance edge surface and a light exit plate surface, and a chassis. The light entrance edge surface is a part of outer peripheral edge surfaces of the light guide plate and extends in a peripheral direction and light from the LEDs enters through the light entrance edge surface. The light exit plate surface is one of plate surfaces of the light guide plate and light exits through the light exit plate surface. The LEDs and the light guide plate are arranged in the chassis and the chassis has a fitting hole that is open in a direction crossing an extending direction of the light entrance edge surface such that the LEDs are inserted in and removed from the fitting hole according to mounting and detaching of the unit body.

Claims11

Dependent claims

A lighting device comprising:

a light source;
a light source holding member holding the light source;
a light guide plate having a light entrance edge surface and a light exit plate surface, the light entrance edge surface being a part of outer peripheral edge surfaces of the light guide plate and extending in a peripheral direction and through which light from the light source enters, and the light exit plate surface being one of a pair of plate surfaces of the light guide plate and through which light exits;
and
a casing in which the light source and the light guide plate are arranged and the light source holding member is detachably mounted, the casing having a hole that is open in a direction crossing an extending direction in which the light entrance edge surface extends such that the light source is inserted in and removed from the hole according to mounting and detaching of the light source holding member, wherein
the casing includes at least a bottom portion that supports a plate surface of the light guide plate opposite from the light exit plate surface and the bottom portion has the hole.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/574,100Filed 12 May 2016
Priority: JP 2015-10097018 May 2015
Published: US 2018/0217313 A12 Aug 2018
Granted: 4 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

G02B 6/009
Positioning aspects: of the light source in the package
G02B 6/0023
Means for improving the coupling-in of light from the light source into the light guide: provided by one optical element, or plurality thereof,…
G02B 6/0083
Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides,…:…
G02B 6/0088
Positioning aspects: of the light guide or other optical sheets in the package

Family

US 2018/0217313 A1Pre-grant publication · published 2 Aug 2018
US 10,310,173 B2This patent

From the US filing history. Foreign family members aren’t listed.

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