Optical apparatus including a holding member having an opening or a cutout, and display including the optical apparatus

• US 9,110,307 B2
• Filed: 08/12/2011
• Issued: 08/18/2015
• Est. Priority Date: 08/19/2010
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Isobe, Hiroshi
• Primary Examiner(s): Sugarman, Scott J
• Assistant Examiner(s): Washington, Tamara Y
• Application Number:
  US13/209,055
• Publication Number:
  US 20120044557A1
• Time in Patent Office: 1,467 Days
• Field of Search: 353/39, 353/557, 359/557
• US Class Current: 1/1
• CPC Class Codes: G02B 27/48 Laser speckle optics
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: H02K 2201/18 Machines moving with multiple degrees of freedom
• CPC Class Codes: H02K 33/16 with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
• CPC Class Codes: H04N 9/3111 for displaying the colours sequentially, e.g. by using sequentially activated light sources sequential projection in colour photography G03B33/08
• 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 9/3161 using laser light sources using laser beams scanning the display screen H04N9/3129
• CPC Class Codes: H04N 9/3173 wherein the projection device is specially adapted for enhanced portability

Abstract

There is provided a display apparatus and an optical apparatus by which the generation of interfering pattern can be reduced while achieving miniaturization. The optical apparatus includes an optical device through which laser light passes; one or more holding members holding the optical device; and a driving section allowing the optical device to vibrate in a plane orthogonal to a light path of the laser light. Each of the holding members has an opening or a cutout through which the optical device passes at the time of vibration.

Claims

1. An optical apparatus comprising:

an optical device through which laser light passes;

one or more holding members holding the optical device; and

a driving section that causes the optical device to vibrate in a plane orthogonal to a light path of the laser light,

wherein,

each of the one or more holding members has an opening or a cutout,

the opening or the cutout in the holding member is configured such that the optical device can pass through the opening or the cutout as the optical device vibrates in the plane orthogonal to the light path of the laser light,

the optical device has a side wall along a thickness direction of the optical device, the thickness direction being orthogonal to the plane in which the optical device vibrates,

the side wall faces the opening or the cutout, and

in the thickness direction of the optical device, a size of the opening or the cutout is such that when the optical device passes through the opening or the cutout, the optical device does not touch the holding member.

2. The optical apparatus according to claim 1, wherein the driving section includes a coil and a magnet.

3. The optical apparatus according to claim 2, wherein a yoke is arranged around the magnet to prevent a magnetic flux emanated from the magnet from being output to the outside of the optical apparatus.

4. The optical apparatus according to claim 1, wherein each of the one or more holding members is an elastic member.

5. The optical apparatus according to claim 4, wherein each of the one or more holding members includes a flat spring or a wire suspension.

6. The optical apparatus according to claim 5, wherein each of the one or more holding members is subjected to a surface treatment intended to reduce optical reflectivity.

7. The optical apparatus according to claim 1, wherein the optical device is a prism array, a diffraction device, or a lens.

8. The optical apparatus according to claim 1, wherein the driving section causes the optical device to vibrate along a predetermined one direction or predetermined two directions in the plane orthogonal to the light path of the laser light.

9. A display apparatus comprising:

a light source section including a laser light source;

a light modulating device that modulates light from the light source section based on an image signal; and

an optical apparatus arranged between the light source section and the light modulating device, the optical apparatus including

(a) an optical device through which laser light from the laser light source passes,

(b) one or more holding members holding the optical device, and

(c) a driving section causing the optical device to vibrate in a plane orthogonal to a light path of the laser light,

wherein,

each of the one or more holding members includes an opening or a cutout,

the opening or the cutout is configured such that the optical device can pass through the opening or the cutout as the optical device vibrates in the plane orthogonal to the light path of the laser light,

the optical device has a side wall along a thickness direction of the optical device, the thickness direction being orthogonal to the plane in which the optical device vibrates,

the side wall faces the opening or the cutout, and

in the thickness direction of the optical device, a size of the opening or the cutout is such that when the optical device passes through the opening or the cutout, the optical device does not touch the holding member.

10. The display apparatus according to claim 9, further comprising:

an optical system that projects light modulated by the light modulating device onto a surface.

11. The display apparatus according to claim 9, wherein the light modulating device is a liquid crystal device.

12. The display apparatus according to claim 9, wherein the light source section includes three kinds of light sources each emitting red light, green light, or blue light.

13. The display apparatus according to claim 12, wherein at least one of the three kinds of light sources is the laser light source.