Projector with three-dimensional display

• US 9,344,713 B2
• Filed: 01/15/2015
• Issued: 05/17/2016
• 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:
  US14/598,120
• Publication Number:
  US 20150124221A1
• Time in Patent Office: 488 Days
• Field of Search: 353/7, 353/8, 353/84, 353/85, 353/88, 353/94, 359/618, 359/462, 359/464, 359/619, 359/630, 359/633, 359/670, 349/5, 349 7- 9, 349 15- 16, 348743-747
• US Class Current: 1/1
• 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 lamp that emits projection light to project a 3-dimensional picture, in which a right eye image and a left eye image are presented in a time division manner, to an object;

a synchronization signal transmission section which transmits shutter synchronization signal to a pair of glasses having a right eye shutter and a left eye shutter which have transmissivity including first transmissivity and second transmissivity lower than the first transmissivity independently, to control the transmissivity of the right eye shutter and the left eye shutter, based on a signal indicating a displaying period of the right eye image and the left eye image of the 3-dimensional picture; and

a lamp drive section that supplies AC current to the lamp so that the lamp has a peak of lamp brightness when the transmissivity of the right eye shutter is the first transmissivity and when the transmissivity of the left eye shutter is the first transmissivity based on the signal indicating a displaying period of the right eye image and the left eye image of the 3-dimensional picture.

2. The projector according to claim 1, wherein a relative value of the first transmissivity is greater than 0.1, the relative value indicated relatively its maximum value as 1.

3. The projector according to claim 1, wherein a relative value of the first transmissivity is greater than 0.8, the relative value indicated relatively its maximum value as 1.

4. The projector according to claim 1, wherein the first transmissivity is the maximum value of the transmissivity of each the right eye shutter and the left eye shutter.