Virtual image display apparatus and video device unit manufacturing method

Patent metadata

Field	Value
Publication number	US-2021227171-A1
Application number	US-202117206614-A
Country	US
Kind code	A1
Filing date	Mar 19, 2021
Priority date	Feb 15, 2016
Publication date	Jul 22, 2021
Grant date	—

Abstract

An image display device is a self-luminous type device including a light emitting portion, and a casing portion of a display device unit has a heat dissipating structure portion through which a part of the image display device is exposed for heat dissipation. In manufacturing the display device unit, when performing simple and reliable assembly while securing a high heat dissipation characteristic, for example, by using characteristics of a silicon substrate, high accurate positioning is performed in a display device positioning portion.

First claim

What is claimed is:

1 . A virtual image display apparatus comprising:
a video device including a first surface and second surface, the first surface being a surface emitting a video light, the second surface being opposite to the first surface; a casing portion accommodating the video device and having an opening; and a heat dissipating portion dissipating heat from the video device, wherein the casing portion exposes the second surface via the opening, and the heat dissipating portion is attached on the second surface.

2 . The virtual image display apparatus according to claim 1 , further comprising:
a half mirror reflecting a part of the video light; and a projection optical system projecting the video light to a half mirror from the video device.

3 . The virtual image display apparatus according to claim 1 , wherein
the heat dissipating portion extends in a first direction from the second surface.

4 . The virtual image display apparatus according to claim 3 , further comprising:
a light guide member guiding the video light from the video device; and a frame portion supporting the light guide member, wherein the heat dissipating portion is a thermal conductive tape, and the heat dissipating portion extends to the frame portion, which is in the first direction from the second surface, the first direction not being parallel with the second surface.

5 . The virtual image display apparatus according to claim 1 , wherein
the video device includes an OLED element on a silicon substrate, and the second surface is a surface the silicon substrate.

6 . The virtual image display apparatus according to claim 1 , wherein
the casing portion includes a video device positioning portion that contacts with a place other than the second surface.

7 . The virtual image display apparatus according to claim 4 , wherein
the video device includes a flexible printed circuit portion that is not overlapped with the thermal conductive tape.

8 . The virtual image display apparatus according to claim 7 , wherein
the flexible printed circuit portion includes a thermal conductive material.

Assignees

• Seiko Epson Corp

Inventors

• Totani Takahiro
• Takagi Masayuki
• Hama Yoshitaka

Classifications

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B27/0176

  characterised by mechanical features · CPC title

• H05K7/20954

  for display panels · CPC title

• G02B27/017 Primary

  Head mounted · CPC title

• H04N5/64 Primary

  Constructional details of receivers, e.g. cabinets or dust covers (furniture aspects {of television cabinets} A47B81/06) · CPC title