# US 2010/0165307 A1 · Laser image display, and optical integrator and laser light source package used in such laser image display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0165307 A1 - Document ID: US20100165307A1 - Status: Published application - Kind: A1 - Application number: 11/997,117 - Filed: 2006-06-01 - Published: 2010-07-01 - Earliest claimed: 2005-07-28 - Assignees: Panasonic Corporation - Inventors: Tetsuro Mizushima; Ken'ichi Kasazumi; Tatsuo Itoh; Tomoya Sugita; Kazuhisa Yamamoto; Shin-ichi Kadowaki - Web page: https://patentgrep.com/patent/US20100165307A1 ## CPC - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - G02B 26/105: {with one or more pivoting mirrors or galvano-mirrors (G02B26/101 takes precedence)} - G02B 27/0961: {Lens arrays (lens arrays per se G02B3/0006)} - G03B 21/005: {Projectors using an electronic spatial light modulator but not peculiar thereto} - 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)} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract A laser image display comprising a laser light source emitting laser light, a beam deflector element for receiving laser light and deflecting its advancing direction, a beam deflecting element control section for controlling the degree of deflection performed by the beam deflector element, an optical integrator for receiving and guiding the deflected laser light to output from its outputting end face, a pseudo surface light source element for scattering the deflected laser light, and a modulation element for receiving and modulating the laser light scattered by the false surface light source element. ## Claims ### Claim 1 A laser image display comprising: a laser light source which emits a laser light; a beam deflector element section which receives the laser light and deflects an advancing direction of the laser light; a beam deflector element control section which controls an extent of deflection by said beam deflector element section; an optical integrator which receives and guides the deflected laser light, and emits the laser light from an exit end face; a pseudo-surface light source element which scatters the deflected laser light; and a modulation element which receives and modulates the laser light scattered by said pseudo-surface light source element. ### Claim 2 (depends on 1) The laser image display according to claim 1, wherein a shape of the exit end face of said optical integrator has similarity with a shape of an effective surface of the modulation element. ### Claim 3 (depends on 1) The laser image display according to claim 1, wherein said pseudo-surface light source element is arranged between light guiding parts of said proximate optical integrator along a light path of the laser light. ### Claim 4 (depends on 1) The laser image display according to claim 1, wherein said pseudo-surface light source element is arranged between the exit end face of said optical integrator and said modulation element along the light path of the laser light. ### Claim 5 (depends on 1) The laser image display according to claim 1, wherein said beam deflector element control section variably controls the extent of deflection by said beam deflector element section in time series. ### Claim 6 (depends on 1) The laser image display according to claim 1, wherein said pseudo-surface light source element provides different phases to the laser light depending on at least a position or an incident angle at which the laser light enters. ### Claim 7 (depends on 1) The laser image display according to claim 1, wherein: said beam deflector element section is an element in which a deflecting operation on the laser light changes the light path of the laser light direction forming an angle θ, the θ being between 0 degree to θ1 degrees with respect to the optical axis; said pseudo-surface light source element is an element which acts a scattering operation of a half-value scattering angle φ1 to the laser light which enters with a direction parallel to the optical axis; and the θ1 and the φ1 satisfies a relationship of θ1>φ1. ### Claim 8 (depends on 7) The laser image display according to claim 7, further comprising: a projective optical system, being arranged between said pseudo-surface light source element and said modulation element along the advancing direction of the laser light, which has the received laser light entering said modulation element; and a projecting optical system, being arranged in a downstream of said modulation element along the advancing direction of the laser light, which enlarges the modulated laser light, wherein Equation   1  0.7 × tan - 1  ( 1 2  F ) < 1 a  θ 1 2 + φ 1 2 < 1.2 × tan - 1  ( 1 2  F ) ( 1 ) is satisfied, the a being a magnification of said projective optical system and the F being an F number of said projecting optical system. ### Claim 9 (depends on 1) The laser image display according to claim 1, wherein said pseudo-surface light source element changes a polarizing direction of incident laser light which enters said pseudo-surface light source element substantially at random. ### Claim 10 (depends on 9) The laser image display according to claim 9, wherein said pseudo-surface light source element is made of birefringent material having a non-uniform thickness distribution with respect to a direction perpendicular to the optical axis of the optical system in which the pseudo-surface light source element is involved. ### Claim 11 (depends on 1) The laser image display according to claim 1, wherein said modulation element includes a micro-lens which deflects the laser light entering a pixel contained in said modulation element, in an upstream with respect to the advancing direction of the laser light. ### Claim 12 (depends on 1) The laser image display according to claim 1, wherein: said laser light source includes a semiconductor laser; said modulation element has the effective surface of a rectangular shape; and a thickness direction of an active layer of said semiconductor laser and a long side direction of the rectangular shape are parallel. ### Claim 13 (depends on 12) The laser image display according to claim 12, wherein said semiconductor laser has a stripe width of greater than or equal to ten times of a wavelength of the laser light that can emit. ### Claim 14 (depends on 1) The laser image display according to claim 1, wherein: said laser light source includes a first laser light source unit being capable of emitting a first laser light having a first wavelength and a second laser light source unit being capable of emitting a second laser light having a second wavelength longer than the first wavelength; and a light path length to said modulation element of the first laser light is shorter than a light path length to said modulation element of the second laser light. ### Claim 15 An optical integrator comprising an optical integrator upstream part and an optical integrator downstream part which guide laser light, and a pseudo-surface light source element which scatters the laser light, wherein said pseudo-surface light source element is arranged so as to be sandwiched by a light guiding part of said optical integrator upstream part and a light guiding part of said optical integrator downstream part. ### Claim 16 (depends on 15) The optical integrator according to claim 15, wherein a shape of an end face of said optical integrator downstream part being capable of emitting the laser light and being a face on the opposite side to an end face which is proximate to the pseudo-surface light source element, which an optical axis of said optical integrator downstream part passes through and is a portion being capable of emitting the guided laser light, has a rectangular shape having substantially a horizontal to vertical ratio of 4:3. ### Claim 17 (depends on 15) The optical integrator according to claim 15, wherein a shape of an end face of said optical integrator downstream part being capable of emitting the laser light and being a face on the opposite side to an end face which is proximate to said pseudo-surface light source element, which an optical axis of said optical integrator downstream part passes through and is a portion being capable of emitting the guided laser light, has a rectangular shape having substantially a horizontal to vertical ratio of 16:9. ### Claim 18 A laser light source package comprising: a first laser light source unit being capable of emitting a first laser light having a first wavelength; and a second laser light source unit being capable of emitting a second laser light having a second wavelength shorter than the first wavelength, wherein: said first laser light source unit is a semiconductor laser light source having a first stripe width; said second laser light source unit is a semiconductor laser light source having a second stripe width; the first stripe width has a length of greater than or equal to ten times of the first wavelength; and the second stripe width has a length of greater than or equal to ten times of the second wavelength. ### Claim 19 (depends on 18) The laser light source package according to claim 18, wherein the first stripe width is longer than the second stripe width.