Virtual image display apparatus and video device unit manufacturing method

Patent metadata

Field	Value
Publication number	US-2019215478-A1
Application number	US-201916299504-A
Country	US
Kind code	A1
Filing date	Mar 12, 2019
Priority date	Feb 15, 2016
Publication date	Jul 11, 2019
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 that includes a light emitting portion that generates video light; and a casing portion that accommodates the video device, wherein the casing portion has a heat dissipating structure portion through which a side of the video device opposite to a side thereof where video light is emitted is exposed for heat dissipation.

2 . The virtual image display apparatus according to claim 1 ,
wherein the casing portion has a configuration of a single member that is formed with an opening through which a part of the video device is exposed in the heat dissipating structure portion.

3 . The virtual image display apparatus according to claim 1 ,
wherein the video device is configured so that an OLED element that forms the light emitting portion is formed on a silicon substrate, and wherein the heat dissipating structure portion is configured to cause a rear surface of the silicon substrate to be exposed therethrough for heat dissipation, in the casing portion.

4 . The virtual image display apparatus according to claim 3 ,
wherein the video device is positioned by being in contact with the casing portion in edge surfaces other than the rear surface of the silicon substrate.

5 . The virtual image display apparatus according to claim 1 ,
wherein the casing portion includes a video device positioning portion that determines an accommodation position of the video device by being in contact with a place other than a place where the video device is exposed.

6 . The virtual image display apparatus according to claim 1 , further comprising:
a heat dissipating portion that dissipates heat of an exposure portion of the video device exposed through the heat dissipating structure portion.

7 . The virtual image display apparatus according to claim 6 ,
wherein the heat dissipating portion is a thermal conductive tape attached to the exposure portion.

8 . The virtual image display apparatus according to claim 1 ,
wherein the casing portion includes a mask portion that covers a part of a surface of the video device on a side where video light is emitted, and an attachment portion for attachment alignment with respect to another optical part.

9 . The virtual image display apparatus according to claim 1 , further comprising:
an adhesion portion that is formed of a high thermal conductive silicon-based adhesive or a thermal conductive epoxy adhesive, and fixes the video device and the casing portion.

10 . The virtual image display apparatus according to claim 1 , further comprising:
a light guide member that guides video light from the video device through total reflection on a plurality of surfaces; and a projection optical system that makes the video light from the video device incident to the light guide member.

11 . A video device unit manufacturing method in which a video device unit includes a video device that includes a light emitting portion that generates video light and a casing portion that accommodates the video device, and the casing portion includes a heat dissipating structure portion through which a side of the video device opposite to a side thereof where video light is emitted is exposed for heat dissipation and a video device positioning portion that is in contact with a place other than a place where the video device is exposed and determines an accommodation position of the video device, the method comprising:
applying an adhesive for fixing the video device in the video device positioning portion of the casing portion; and positioning the video device and the casing portion and fixing the video device and the casing portion using the adhesive with the video device being exposed through the heat dissipating structure portion.

12 . A virtual image display apparatus comprising:
a video device that includes a light emitting portion that generates video light; and a casing portion that accommodates the video device, wherein the casing portion has a thermal conductive member that conducts heat of the light emitting portion in contact with the video device.

13 . The virtual image display apparatus according to claim 12 ,
wherein in the casing portion, the thermal conductive member is formed of a metallic material, a filler-containing resin, a grapheme member, or a heat pipe.

14 . The virtual image display apparatus according to claim 12 ,
wherein the casing portion is formed of aluminum, titanium, copper, stainless steel, a grapheme member, or a heat pipe.

15 . The virtual image display apparatus according to claim 12 ,
wherein in the casing portion, the thermal conductive member is in contact with a side of the video device opposite to a side thereof where video light is emitted.

16 . The virtual image display apparatus according to claim 12 ,
wherein the video device is configured so that an OLED element that forms the light emitting portion is formed on a silicon substrate, and wherein the casing portion includes a video device positioning portion that determines an accommodation position of the video device by being in contact with the silicon substrate.

17 . The virtual image display apparatus according to claim 12 , further comprising:
a mask portion that is provided on a side of the video device where video light is emitted and covers the vicinity of a light emission area of the video device, wherein the casing portion includes a mask positioning portion that determines a position of the mask portion by being in contact with the mask portion.

18 . The virtual image display apparatus according to claim 12 ,
wherein, in the casing portion, the thermal conductive member is provided in a connection portion with respect to another optical member.

19 . The virtual image display apparatus according to claim 12 ,
wherein the video device includes a flexible printed circuit (FPC) portion that is connected and extended from a main body portion that includes the light emitting portion, and wherein the FPC portion includes a thermal conductive material that conducts heat of the light emitting portion.

20 . The virtual image display apparatus according to claim 12 , further comprising:
a pair of right and left light guide members that guides video light from the video devices provided as a pair on right and left sides; a frame portion that supports the pair of light guide members and is formed of a metallic material; and a cable portion that is provided along the frame portion in contact with the frame portion and performs signal transmission with respect to the pair of video devices provided on the right and left sides.

Assignees

• Seiko Epson Corp

Inventors

• Totani Takahiro
• Takagi Masayuki
• Hama Yoshitaka

Classifications

• G03B21/16

  Cooling; Preventing overheating · CPC title

• H04N5/64 Primary

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

• H04N9/30

  using solid-state colour display devices · CPC title

• G02B27/0176

  characterised by mechanical features · CPC title

• G02B27/017 Primary

  Head mounted · CPC title