ORGANIC ELECTROLUMINESCENT LIGHT-EMITTING APPARATUS

Abstract

An organic EL light-emitting apparatus includes a base, an organic EL device, a prism member, a polarizing member, and a phase member. The prism member, the polarizing member, and the phase member are adjacent to a light extraction side of the organic EL device. The prism member includes a plurality of unit prisms each having a triangular-column shape. The unit prisms are arranged such that their longitudinal directions are parallel to one another. The polarizing member is disposed further from the base than the prism member. The prism member has an apex angle between 90° to 140°.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A and 1B illustrate exemplary arrangements that include optical components at a light extraction side of an organic EL device in a display panel according to an embodiment of the present invention.

FIG. 2 illustrates an exemplary structure of the organic EL device used in an organic EL light-emitting apparatus according to an exemplary embodiment of the present invention.

FIG. 3 illustrates a prism member used in the organic EL light-emitting apparatus.

FIG. 4 illustrates a characteristic of an emission angle of reflection of incident outside light on a prism member having an apex angle of 45° and an incident angle of 15°.

FIG. 5 illustrates a characteristic of an emission angle of reflection of incident outside light on a prism member having an apex angle of 140° and an incident angle of 15°.

FIG. 6 illustrates a characteristic of an emission angle to emission intensity of an organic EL device laminated with a prism member having an apex angle of 110°.

Claims

1. An organic electroluminescent light-emitting apparatus comprising: a base;an organic electroluminescent light-emitting device on the base, the organic electroluminescent light-emitting device having a pair of electrodes and an organic compound layer disposed between the pair of electrodes;a phase member adjacent to a light extraction side of the organic electroluminescent light-emitting device;a polarizing member adjacent to a light extraction side of the phase member; anda prism member adjacent to a side of the polarizing member that faces the base, the prism member including a plurality of unit prisms each having a triangular-column shape, the unit prisms being arranged such that their longitudinal directions are parallel to one another,wherein the prism member has an apex angle between 90° to 140°.

2. The organic electroluminescent light-emitting apparatus according to claim 1, wherein, the polarizing member, the phase member, the prism member, and the organic electroluminescent light-emitting device are arranged in this order from the light extraction side.

3. The organic electroluminescent light-emitting apparatus according to claim 1, wherein, the polarizing member, the prism member, the phase member, and the organic electroluminescent light-emitting device are arranged in this order from the light extraction side.

4. The organic electroluminescent light-emitting apparatus according to claim 1, wherein the organic electroluminescent light-emitting apparatus is rectangular, and wherein a pitch direction of the prism member is substantially aligned with a longitudinal direction of the organic electroluminescent light-emitting apparatus.

5. The organic electroluminescent light-emitting apparatus according to claim 1, wherein the prism member has an antireflection surface that includes projections and depressions.

6. The organic electroluminescent light-emitting apparatus according to claim 1, wherein an absorption axis of the polarizing member is substantially perpendicular to a longitudinal direction of the prism member.

7. The organic electroluminescent light-emitting apparatus according to claim 1, wherein the polarizing member, the phase member, and the prism member are disposed at a side of the organic electroluminescent light-emitting device opposite from the base, and wherein light emitted in the organic compound layer is extracted from a side opposite to the base.