Virtual image display apparatus and video device unit manufacturing method

Patent metadata

Field	Value
Publication number	US-10674108-B2
Application number	US-201916299504-A
Country	US
Kind code	B2
Filing date	Mar 12, 2019
Priority date	Feb 15, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

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 head mounted display comprising:
a first display device that includes a first video device, a first casing portion, a first projection optical system, a first cover-shaped exterior member, and a first light guide member;
a second display device that includes a second video device, a second casing portion, a second projection optical system, a second cover-shaped exterior member, and a second light guide member,
wherein the first video device emits first video light to the first projection optical system,
wherein the second video device emits second video light to the second projection optical system,
wherein the first projection optical system emits the first video light from the first video device to the first light guide member,
wherein the second projection optical system emits the second video light from the second video device to the second light guide member,
wherein the first casing portion accommodates the first video device and exposes an opposite surface of the first video device that is opposite to a light emitting surface of the first video light,
wherein the second casing portion accommodates the second video device and exposes an opposite surface of the second video device that is opposite to a light emitting surface of the second video light,
wherein the first display device has a first thermal conductive tape attached between the opposite surface of the first video device and the first cover-shaped exterior member, and
wherein the second display device has a second thermal conductive tape attached between the opposite surface of the second video device and the second cover-shaped exterior member.

2. The head mounted display according to claim 1 ,
wherein the first video device is configured so that an OLED element that forms a first light emitting portion is formed on a first silicon substrate,
wherein the second video device is configured so that an OLED element that forms a second light emitting portion is formed on a second silicon substrate,
wherein the opposite surface of the first video device is a rear surface of the first silicon substrate, and
wherein the opposite surface of the second video device is a rear surface of the second silicon substrate.

3. The head mounted display according to claim 2 ,
wherein the first video device is positioned by being in contact with the first casing portion at edge surfaces other than the rear surface of the first silicon substrate, and
wherein the second video device is positioned by being in contact with the second casing portion at edge surfaces other than the rear surface of the second silicon substrate.

4. The head mounted display according to claim 1 ,
wherein the first casing portion includes a first video device positioning portion that determines an accommodation position of the first video device by being in contact with a place other than the opposite surface of the first video device, and
wherein the second casing portion includes a second video device positioning portion that determines an accommodation position of the second video device by being in contact with a place other than the opposite surface of the second video device.

5. The head mounted display according to claim 1 ,
wherein the first display device includes a first lens barrel,
wherein the second display device includes a second lens barrel,
wherein the first casing portion includes (i) a first mask portion that covers a part of the light emitting surface of the first video light and (ii) a first attachment portion for attachment alignment with respect to the first lens barrel, and
wherein the second casing portion includes (i) a second mask portion that covers a part of the light emitting surface of the second video light and (ii) a second attachment portion for attachment alignment with respect to the second lens barrel.

6. The head mounted display according to claim 2 ,
wherein the first video device includes a first flexible printed circuit (FPC) portion that is connected and extended from a main body portion that includes the first light emitting portion,
wherein the second video device includes a second flexible printed circuit (FPC) portion that is connected and extended from a main body portion that includes the second light emitting portion, and
wherein one of the first FPC portion and the second FPC portion is located along the first light guide member and the second light guide member.

7. The head mounted display according to claim 6 ,
wherein the first FPC portion includes a thermal conductive material that conducts heat of the first light emitting portion, and
wherein the second FPC portion includes a thermal conductive material that conducts heat of the second light emitting portion.

8. The head mounted display according to claim 1 , further comprising:
a frame portion, which supports the first light guide member and the second first light guide member, formed of a metallic material,
wherein the frame portion has a part of the first cover-shaped exterior member and a part of the second cover-shaped exterior member,
wherein the first thermal conductive tape is attached between the opposite surface of the first video device and the part of the first cover-shaped exterior member, and
wherein the second thermal conductive tape is attached between the opposite surface of the second video device and the part of the second cover-shaped exterior member.

Assignees

• Seiko Epson Corp

Inventors

• Totani Takahiro
• Takagi Masayuki
• Hama Yoshitaka

Classifications

• G03B21/16

  Cooling; Preventing overheating · CPC title

• G02B27/0176

  characterised by mechanical features · CPC title

• H04N9/30

  using solid-state colour display devices · CPC title

• H04N5/64 Primary

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

• G02B27/017 Primary

  Head mounted · CPC title