US 2016/0259114 A1Published application

Display device and portable electronic apparatus

AssigneeSeiko Epson Corporation

InventorHidekazu Kobayashi

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Abstract

A display device includes a reflective display panel and an illumination device (a front light). In the illumination device, a side surface on an opposite side of a light guide plate to a light source is a curved section, and an end surface of the curved section is a tapered surface. With respect to the light guide plate, a light absorption layer, which overlaps with an end section on the opposite side to the light source, is provided on a side of the display panel. Therefore, it is difficult for a circumstance in which light that is reflected toward the display panel in the end section is reflected by the display panel, and emitted from a second surface of the light guide plate, to occur.

Claims18

Dependent claims

A display device comprising:

a display panel;
and
an illumination device, which is provided with a light guide plate that is disposed facing the display panel, and a light source that faces a side surface of the light guide plate, which emits illumination light onto the display panel from one surface in a thickness direction of the light guide plate, and which emits image light that is modulated by the display panel from the other surface in the thickness direction of the light guide plate,
wherein at least an end section of the side surface that is on an opposite side to the light source is a tapered surface, and
wherein at least a light absorption layer, which overlaps with the end section on the opposite side, is provided on a side of the display panel with respect to the light guide plate.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/047,904Filed 19 Feb 2016
Priority: JP 2015-0443646 Mar 2015
Published: 8 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G02B 6/0016
Provided on the surface of the light guide or in the bulk of it: grooves, prisms, gratings, scattering particles or rough surfaces
G02B 6/0036
Provided on the surface of the light guide or in the bulk of it: 2-D arrangement of prisms, protrusions, indentations or roughened surfaces
G02B 6/0058
Means for improving the coupling-out of light from the light guide: varying in density, size, shape or depth along the light guide
G02B
Optical elements, systems or apparatus

Family

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