Projector having holders arranged in a light emitting direction

• US 9,696,545 B2
• Filed: 07/10/2015
• Issued: 07/04/2017
• Est. Priority Date: 07/11/2014
• Status: Active Grant

• Current Assignee: Funai Electric Co., Ltd.
• Original Assignee: Funai Electric Co., Ltd.
• Inventors: Kobayashi, Tomohiro
• Primary Examiner(s): Chowdhury, Sultan
• Application Number:
  US14/796,517
• Publication Number:
  US 20160011416A1
• Time in Patent Office: 725 Days
• CPC Class Codes: B29C 65/1616 Near infrared radiation [NIR], e.g. by YAG lasers
• CPC Class Codes: B29C 65/1638 focusing the laser beam on the interface
• CPC Class Codes: B29C 65/1677 making use of an absorber or impact modifier
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/54 Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/8122 characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
• CPC Class Codes: B29C 66/81267 Transparent to electromagnetic radiation, e.g. to visible light
• CPC Class Codes: B29C 66/8322 Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2081/04 Polysulfides, e.g. PPS, i.e. polyphenylene sulfide or derivatives thereof
• CPC Class Codes: B29K 2909/08 Glass
• CPC Class Codes: B29L 2011/00 Optical elements, e.g. lenses, prisms
• CPC Class Codes: G02B 2027/0161 characterised by the relative positioning of the constitutive elements
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0149 characterised by mechanical features G02B27/0176 takes precedence
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: H04N 9/3129 : scanning a light beam on the display screen scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161
• CPC Class Codes: H04N 9/315 : Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20

Abstract

A projector includes a light source portion; and an optical scanning portion that scans light from the light source portion, wherein the light source portion comprises a first holder that holds a light source, and a second holder that holds an optical portion through which light from the light source is emitted, and the first holder and the second holder are arranged in that order from a light emitting direction.

Claims

1. A projector comprising:

a light source portion; and

an optical scanning portion that scans light from the light source portion, wherein

the light source portion comprises a first holder that holds a light source, and a second holder that holds an optical portion through which light from the light source is emitted,

the first holder and the second holder are arranged in that order from a light emitting direction, and

one of the first holder or the second holder is made of light transmitting resin, and the other one is made of light absorbing resin.

2. The projector of claim 1, wherein the first holder and the second holder are fixed by welding.

3. The projector of claim 2, wherein the welding is laser welding.

4. The projector of claim 3, wherein the laser welding is applied to a plurality of positions on the first holder and the second holder.

5. The projector of claim 4, wherein the light source is sandwiched between the plurality of positions when viewed from an optical axis direction.

6. The projector of claim 1, wherein the first holder is made of light transmitting resin, and the second holder is made of light absorbing resin.

7. The projector of claim 1, wherein the light transmitting resin transmits 15% or more laser light of 800 nm to 1100 nm.

8. The projector of claim 5, wherein

the first holder is made of light transmitting resin, and

the first holder comprises a protruding portion on the opposite side of a laser welding surface of the second holder.

9. The projector of claim 8, wherein the protruding portion is a region corresponding to a laser welding region on the laser welding surface of the second holder.

10. The projector of claim 3, wherein a thickness in an optical axis direction of a laser welding region of the first holder is thinner than a thickness of a laser welding region of the second holder.

11. The projector of claim 3, wherein

the light source portion further comprises a housing holding the second holder, and

the second holder and the housing are fastened by a fastening member.

12. The projector of claim 3, wherein the optical scanning portion scans light from the light source portion corresponding to a virtual image that a user views.

13. The projector of claim 10, wherein the thickness in the optical axis direction of the laser welding region of the first holder is 0.2 to 10 mm.

14. The projector of claim 2, wherein a gap exists around a laser welding region of the first holder and the second holder.

15. The projector of claim 14, wherein the gap is 0 to 100 μ

m.

16. The projector of claim 3, wherein

the light source portion further comprises a housing holding the second holder, and

the second holder and the housing are adhesively bonded by an adhesive.

17. The projector of claim 1, wherein the optical portion comprises a collimator lens.