LIGHT-EMITTING DEVICE

• US 20190319220A1
• Filed: 06/24/2016
• Published: 10/17/2019
• Est. Priority Date: 06/24/2016
• Status: Active Grant

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: HIRASAWA, Akira
• Granted Patent: US 10,727,449 B2
• Time in Patent Office: Days
• CPC Class Codes: H05B 33/02 Details
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 59/84 Parallel electrical configurations of multiple OLEDs
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/371 Metal complexes comprising a group IB metal element, e.g. comprising copper, gold or silver
• CPC Class Codes: H10K 85/381 Metal complexes comprising a group IIB metal element, e.g. comprising cadmium, mercury or zinc

Abstract

A light-emitting device (10) includes a light-transmitting first base material (210), a light-transmitting second base material (220), and a plurality of light-emitting units (140). The light-emitting units (140) are located between the first base material (210) and the second base material (220). The light-emitting units (140) emit light having a peak at a first wavelength. In addition, the light-emitting device (10) includes a light-transmitting region located between the plurality of light-emitting units (140). Further, the second base material (220) includes an absorption layer (170). The absorption layer (170) is a layer that particularly absorbs light of the first wavelength.

Claims

1. A light-emitting device comprising:

a plurality of light-emitting units located between a light-transmitting first base material and a light-transmitting second base material, the light-emitting units emitting light having a peak at a first wavelength; and

a light-transmitting region located between the plurality of light-emitting units, wherein the second base material comprises an absorption layer, and

wherein the absorption layer has a higher light absorption ratio at the first wavelength than an average light absorption ratio within a wavelength range of equal to or higher than 400 nm and equal to or lower than 700 nm.

5. The light-emitting device according to claim 1,

wherein the light-emitting unit comprises a light-transmitting first electrode, a light-shielding second electrode, and an organic layer located between the first electrode and the second electrode, and

wherein the second electrode is located on a side of the first electrode opposite to a side of the first base material.

6. The light-emitting device according to claim 5,

wherein the light-emitting unit comprises the organic layer comprising Btplr.

7. The light-emitting device according to claim 1,

wherein the light absorption ratio of the absorption layer is equal to or less than 50% at a wavelength shorter than the first wavelength by 100 nm and at a wavelength longer than the first wavelength by 100 nm.

8. The light-emitting device according to claim 1,

wherein the first wavelength is equal to or greater than 590 nm and equal to or less than 680, and

wherein the absorption layer comprises metal phthalocyanine.

9. The light-emitting device according to claim 1,

wherein the absorption layer is formed at least in a region overlapping the light-emitting unit when viewed from a direction perpendicular to the first base material.

10. The light-emitting device according to claim 9,

wherein the absorption layer is further formed in a region overlapping the light-transmitting region when viewed from the direction perpendicular to the first base material.

11. The light-emitting device according to claim 1,

wherein the second base material comprises a sealing member that covers the light-emitting unit with an adhesive layer interposed therebetween, and

wherein the absorption layer is in contact with the sealing member.

12. The light-emitting device according to claim 1,

wherein the second base material comprises a sealing member that covers the light-emitting unit with an adhesive layer interposed therebetween, and

wherein at least one of the sealing member and the adhesive layer is the absorption layer.

13. The light-emitting device according to claim 1,

wherein the second base material comprises a sealing film that is in contact with the light-emitting unit and that covers the light-emitting unit, and

wherein the sealing film is the absorption layer.

2. A light-emitting device comprising:

a plurality of light-emitting units located between a light-transmitting first base material and a light-transmitting second base material, the light-emitting units emitting light having a peak at a first wavelength; and

a light-transmitting region located between the plurality of light-emitting units,

wherein the second base material comprises an absorption layer, and

wherein an absorption ratio of the absorption layer with respect to light within a wavelength range between two wavelengths as upper and lower limits each having an intensity of one half of a peak intensity of the peak at the first wavelength is equal to or greater than 10%.

3. A light-emitting device comprising:

a plurality of light-emitting units located between a light-transmitting first base material and a light-transmitting second base material, the light-emitting units emitting light having a peak at a first wavelength; and

a light-transmitting region located between the plurality of light-emitting units,

wherein the second base material comprises an absorption layer, and

wherein the absorption layer has an absorption peak within a wavelength range between two wavelengths as upper and lower limits each having an intensity of one half of a peak intensity of the peak at the first wavelength.

4. A light-emitting device comprising:

a plurality of light-emitting units located between a light-transmitting first base material and a light-transmitting second base material, the light-emitting units emitting light having a peak at a first wavelength; and

a light-transmitting region located between the plurality of light-emitting units,

wherein the second base material comprises an absorption layer, and

wherein the first wavelength is contained within a wavelength range between two wavelengths as upper and lower limits each having an absorption intensity of one half of a peak intensity at a maximum light absorption peak of the absorption layer.