Projector for displaying a three-dimensional picture

• US 9,854,228 B2
• Filed: 09/13/2016
• Issued: 12/26/2017
• Est. Priority Date: 09/27/2011
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Horiguchi, Hirosada, Yoshimoto, Hiroshi, Yamada, Tadashi, Fukuhara, Keiji
• Primary Examiner(s): CHOWDHURY, SULTAN U.
• Application Number:
  US15/264,518
• Publication Number:
  US 20170019662A1
• Time in Patent Office: 469 Days
• CPC Class Codes: G02B 30/24 involving temporal multiplexing, e.g. using sequentially activated left and right shutters
• CPC Class Codes: G03B 21/006 using LCD's
• CPC Class Codes: G03B 21/2053 Intensity control of illuminating light controlled by video signal processing H04N5/74 or H04N9/31
• CPC Class Codes: G03B 33/08 Sequential recording or projection G03B33/02, G03B33/04, G03B33/06 take precedence
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: G03B 35/16 by sequential viewing
• CPC Class Codes: G03B 35/24 using apertured or refractive resolving means on screens or between screen and eye
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/344 with head-mounted left-right displays
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof
• CPC Class Codes: H04N 2213/008 Aspects relating to glasses for viewing stereoscopic images
• CPC Class Codes: H04N 9/31 Projection devices for colour picture display , e.g. using electronic spatial light modulators [ESLM]
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406

Abstract

A projector includes a lamp that emits projection light to project 3D picture, in which a right eye image and a left eye image are represented in a time division manner, to an object, a synchronization signal transmission section which transmits shutter synchronization signal to glasses having a right eye shutter and a left eye shutter to control the opened state or the closed state of the right eye shutter and the left eye shutter, based on the signal indicating a displaying period of the right eye image and the left eye image of 3D picture, and a lamp drive section that supplies AC current having peak overlapping with a period when the right eye shutter of the glasses is in the opened state and peak overlapping with a period when the left eye shutter of the glasses is in the opened state to the lamp, based on the signal.

Claims

1. A projector comprising:

a light valve which is driven in accordance with a first image signal in a first period and a second image signal in a second period in a time division manner;

a light source unit which emit a light toward the light valve; and

a light source drive section that supplies a light source drive current to the light source unit;

wherein the light source drive section supply a first drive current so as to the light source unit emits a first brightness in a first part of the first period, the first part of the first period is included within the first period, and the first brightness is a maximum brightness in the first period, and

the light source drive section supply a second drive current so as to the light source unit emits a second brightness in a second part of the second period, the second part of the second period is included within the second period, and the second brightness is a maximum brightness in the second period, and

wherein the first image is displayed in the first period and the second image is displayed in the second period.

2. The projector according to claim 1, a length of the first part of the first period is same as a length of the second part of the second period.

3. The projector according to claim 1, a length of the first period is same as a length of the second period.

4. The projector according to claim 1, the first part of the first period is apart from the second period and the second part of the second period is apart from the first period.

5. The projector according to claim 1, the projector projects 3D image and the first image signal is a right eye image signal and the second image signal is a left eye image signal.

6. The projector according to claim 1, further comprising a picture signal processing section which control the first image signal and the second image signal, and controls the light drive section.

7. A projector comprising:

a light valve which is driven in accordance with a first image signal in a first period and a second image signal in a second period in a time division manner;

a light source unit which emit a light toward the light valve; and

a light source drive section that supplies a light source drive current to the light source unit;

wherein the light source drive section supply a first drive current so as to the light source unit emits a first brightness in a first part of the first period, the first part of the first period is included within the first period, and the first brightness is a maximum brightness, and

the light source drive section supply a second drive current so as to the light source unit emits a second brightness in a second part of the second period, the second part of the second period is included within the second period, and the second brightness has the same maximum brightness as the first brightness.

8. The projector according to claim 7, a length of the first part of the first period is same as a length of the second part of the second period.

9. The projector according to claim 7, a length of the first period is same as a length of the second period.

10. The projector according to claim 7, the first part of the first period is apart from the second period and the second part of the second period is apart from the first period.

11. The projector according to claim 7, the projector projects 3D image and the first image signal is a right eye image signal and the second image signal is a left eye image signal.

12. The projector according to claim 7, further comprising

a picture signal processing section which control the first image signal and the second image signal, and controls the light source drive section.

13. A projector comprising:

a light valve which is driven in accordance with a first frame image in a first frame and a second frame image in a second frame, the second frame is a next frame to the first frame;

a light source unit which emit a light toward the light valve; and

a light source drive section that supplies a light source drive current to the light source unit;

wherein the light source drive section supply a first drive current so as to the light source unit emits a first brightness in a first part of the first frame, the first part of the first frame is included within the first frame, the first brightness is a maximum brightness in the first frame, and the first frame image is projected in the first part of the first frame, and

the light source drive section supply a second drive current so as to the light source unit emits a second brightness in a second part of the second frame, the second part of the second frame is included within the second frame, and the second brightness is a maximum brightness in the second frame, and the second frame image is projected in the second part of the second frame.

14. The projector according to claim 13, a length of the first part of the first frame is same as a length of the second part of the second frame.

15. The projector according to claim 13, a length of the first frame is same as a length of the second frame.

16. The projector according to claim 13, the first part of the first frame is apart from the second frame and the second part of the second frame is apart from the first frame.

17. The projector according to claim 13, the projector projects 3D image and the first frame image is a right eye image and the second frame image is a left eye image.

18. The projector according to claim 13, further comprising

a picture signal processing section which control the first frame image and the second frame image, and controls the light source drive section.