Image display device and virtual image display apparatus

Patent metadata

Field	Value
Publication number	US-11294194-B2
Application number	US-202016802758-A
Country	US
Kind code	B2
Filing date	Feb 27, 2020
Priority date	Feb 28, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

An image display device according to the present disclosure includes a first self-luminous display element that self-emits an image of first color light, a second self-luminous display element that self-emits an image of second color light, a third self-luminous display element that self-emits an image of third color light, and a prism including a dichroic mirror that synthesizes images of three colors, the first, the second, and the third self-luminous display element are each configured to extract light from a side of a semireflective semitransmissive electrode included in the first, the second, and the third self-luminous display element, and at least one of sums of a thickness of a transparent electrode and a thickness of an optical adjustment layer differs from other in the first, the second, and the third self-luminous display element.

First claim

What is claimed is:

1. An image display device comprising:
a first self-luminous display element that emits an image of first color light having a peak in a first color region;
a second self-luminous display element that emits an image of second color light having a peak in a second color region;
a third self-luminous display element that emits an image of third color light having a peak in a third color region; and
a prism including a dichroic mirror that synthesizes the first color light, the second color light, and the third color light, wherein
the first self-luminous display element includes a first support substrate, and a first reflective film, a first optical adjustment layer, a first transparent electrode, a first light-emitting layer, and a first semireflective semitransmissive electrode that are laminated in order from the first support substrate side,
the second self-luminous display element includes a second support substrate, and a second reflective film, a second optical adjustment layer, a second transparent electrode, a second light-emitting layer, and a second semireflective semitransmissive electrode that are laminated in order from the second support substrate side, and
the third self-luminous display element includes a third support substrate, and a third reflective film, a third optical adjustment layer, a third transparent electrode, a third light-emitting layer, and a third semireflective semitransmissive that are laminated in order from the third support substrate side, wherein
the first color light is extracted from the first semireflective semitransmissive electrode of the first self-luminous display element, the second color light is extracted from the second semireflective semitransmissive electrode of the second self-luminous display element, and the third color light is extracted from the third semireflective semitransmissive electrode of the third self-luminous display element, wherein
when a sum of a thickness of the first transparent electrode and a thickness of the first optical adjustment layer is a first lamination thickness, a sum of a thickness of the second transparent electrode and a thickness of the second optical adjustment layer is a second lamination thickness, and a sum of a thickness of the third transparent electrode and a thickness of the third optical adjustment layer is a third lamination thickness,
the first lamination thickness differs from at least one of the second lamination thickness and the third lamination thickness.

2. The image display device according to claim 1 , wherein each of the optical adjustment layers in the first self-luminous display element, the second self-luminous display element, and the third self-luminous display element is constituted of a laminated body of two or more layers.

3. The image display device according to claim 1 , wherein the first self-luminous display element, the second self-luminous display element, and the third self-luminous display element are each an organic electroluminescent element.

4. The image display device according to claim 3 , wherein
the first self-luminous display element includes a first organic layer including the first light-emitting layer,
the second self-luminous display element includes a second organic layer including the second light-emitting layer, and
the third self-luminous display element includes a third organic layer including the third light-emitting layer, wherein
an error in thicknesses between the first organic layer, the second organic layer, and the third organic layer is ±20% or less.

5. The image display device according to claim 4 , wherein
the first lamination thickness is greater than the first organic layer, the second lamination thickness is greater than the second organic layer, and the third lamination thickness is greater than the third organic layer.

6. The image display device according to claim 1 , wherein the thicknesses of the first transparent electrode, the second transparent electrode, and the third transparent electrode are identical to one another.

7. The image display device according to claim 1 , wherein
the thickness of the first optical adjustment layer is greater than the thickness of the first transparent electrode,
the thickness of the second optical adjustment layer is greater than the thickness of the second transparent electrode, and
the thickness of the third optical adjustment layer is greater than the thickness of the third transparent electrode.

8. A virtual image display apparatus, comprising the image display device according to claim 1 .

Assignees

• Seiko Epson Corp

Inventors

• Yamamoto Hidetoshi
• Hamade Yuiga

Classifications

• H10K59/95

  wherein all light-emitting elements are organic, e.g. assembled OLED displays · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/876

  comprising a resonant cavity structure, e.g. Bragg reflector pair · CPC title

• G02B27/141 Primary

  using dichroic mirrors · CPC title

• G02B27/0101 Primary

  characterised by optical features (G02B27/0172 takes precedence) · CPC title