Virtual image display apparatus and video device unit manufacturing method

• US 10,271,003 B2
• Filed: 01/30/2017
• Issued: 04/23/2019
• Est. Priority Date: 02/15/2016
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Totani, Takahiro, Takagi, Masayuki, Hama, Yoshitaka
• Primary Examiner(s): Natnael, Paulos M
• Application Number:
  US15/419,432
• Publication Number:
  US 20170237935A1
• Time in Patent Office: 813 Days
• Field of Search: 345 76, 353 31, 348744
• CPC Class Codes: G02B 27/0176 characterised by mechanical features
• CPC Class Codes: G03B 21/16 Cooling; Preventing overheating
• CPC Class Codes: H04N 5/64 Constructional details of receivers, e.g. cabinets or dust covers furniture aspects of television cabinets A47B81/06
• CPC Class Codes: H04N 9/30 using solid-state colour display devices

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.

Claims

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,

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.

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 positioned by being in contact with the casing portion in edge surfaces other than the rear surface of the silicon substrate.

4. 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.

5. The virtual image display apparatus according to claim 1, wherein the video light is based on a virtual image.

6. The virtual image display apparatus according to claim 5, wherein the video device has a driver IC and a power source element.

8. 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.

9. The virtual image display apparatus according to claim 8,

wherein the heat dissipating portion is a thermal conductive tape attached to the exposure portion.

7. 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, 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 a place other than where the video device is exposed.

10. 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, and

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.

11. A virtual image display apparatus comprising:

a video device that includes a light emitting portion that generates video light;

a casing portion that accommodates the video device;

a light guide member that guides video light from the video device; and

a projection optical system that makes the video light from the video device incident to the light guide member,

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.

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,

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.

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, in the casing portion, the thermal conductive member is provided in a connection portion with respect to another optical member.

17. A virtual image display apparatus comprising:

a video device that includes a light emitting portion that generates video light;

a casing portion that accommodates the video device; and

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 has a thermal conductive member that conducts heat of the light emitting portion in contact with the video device, and

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. 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,

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.

19. A virtual image display apparatus comprising:

a video device that includes a light emitting portion that generates video light;

a casing portion that accommodates the video device;

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,

wherein the casing portion has a thermal conductive member that conducts heat of the light emitting portion in contact with the video device.