JP6694742B2 - レーザ投射表示装置 - Google Patents
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- JP6694742B2 JP6694742B2 JP2016061953A JP2016061953A JP6694742B2 JP 6694742 B2 JP6694742 B2 JP 6694742B2 JP 2016061953 A JP2016061953 A JP 2016061953A JP 2016061953 A JP2016061953 A JP 2016061953A JP 6694742 B2 JP6694742 B2 JP 6694742B2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3129—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] scanning a light beam on the display screen
- H04N9/3135—Driving therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3155—Modulator illumination systems for controlling the light source
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/101—Scanning systems with both horizontal and vertical deflecting means, e.g. raster or XY scanners
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- G—PHYSICS
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- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
- G09G3/025—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen with scanning or deflecting the beams in two directions or dimensions
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 by control of light from an independent source using liquid crystals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/005—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping
- H01S5/0071—Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping for beam steering, e.g. using a mirror outside the cavity to change the beam direction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4075—Beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
- H04N9/3194—Testing thereof including sensor feedback
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4087—Array arrangements, e.g. constituted by discrete laser diodes or laser bar emitting more than one wavelength
- H01S5/4093—Red, green and blue [RGB] generated directly by laser action or by a combination of laser action with nonlinear frequency conversion
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Semiconductor Lasers (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Projection Apparatus (AREA)
Description
図4Aと図4Bは、半導体レーザの動作領域の一例を示す図である。図4Aは動作切り替えなしの場合、図4Bは動作切り替えありの場合である。
S102では、画像処理部2は生成した画像信号に基づき、半導体レーザ(LD)を駆動するための「明るさ設定値S」(図4Bの横軸)を決定する。
S105では、レーザドライバ4に対し、半導体レーザの明るさ設定値Sを変更する。具体的には、図4Bのように設定値をS1’〜S2’の区間の対応位置にシフトさせる。
以後、前記S101へ戻り、次の画像信号について同様の処理を繰り返す。
2…画像処理部、
3…フレームメモリ、
4…レーザドライバ、
5…レーザ光源、
5a,5b,5c…半導体レーザ(LD)、
6…反射ミラー、
7…MEMS走査ミラー、
8…MEMSドライバ、
9…増幅器、
10…光センサ1、
11…照度センサ、
12…CPU、
13…表示画像、
14…液晶素子、
15…光センサ2、
16a…ミラー、
16b…ガラス板、
17…液晶ドライバ。
Claims (4)
- 画像信号に応じたレーザ光を投射して前記画像信号に応じた画像を表示するレーザ投射表示装置において、
前記レーザ光を発生するレーザ光源と、
前記レーザ光源を前記画像信号に応じたレベルでレーザ光を発生するよう駆動するレーザドライバと、
前記レーザ光源が発生したレーザ光を前記画像信号に係る同期信号に応じて走査して投射する走査部と、
前記レーザ光源が発生したレーザ光を所定の透過率で通過させる液晶素子と、
前記液晶素子に電圧を印加して前記透過率を変化させる液晶ドライバと、
前記画像信号を生成し、前記レーザドライバと前記液晶ドライバを制御する画像処理部と、を備え、
前記レーザ光源は、閾値電流を境にして光量が急峻に増加する非線形特性を有する半導体レーザであり、その動作領域を、前記閾値電流より小さい電流で使用する領域A、前記閾値電流より大きい電流で使用する領域C、前記領域Aと前記領域Cに挟まれ前記閾値電流を跨いで使用する領域Bに分割したとき、
前記画像処理部は、前記レーザ光源が前記領域Bで動作する場合には、前記レーザドライバに対し、前記レーザ光源の駆動レベルを所定の倍率Gだけ増加させて前記領域Cにシフトさせるとともに、前記液晶ドライバに対し、前記液晶素子の透過率を所定の倍率1/Gだけ減衰させるよう制御し、
前記レーザ光源が前記領域Aまたは前記領域Cで動作する場合には、前記レーザ光源の駆動レベルを増加させず、かつ前記液晶素子にて透過率を減衰させずに動作させることを特徴とするレーザ投射表示装置。 - 請求項1に記載のレーザ投射表示装置において、
前記レーザ光の前記液晶素子に対する入射側及び出射側の強度をそれぞれ検出する第1の光センサ及び第2の光センサを備え、
前記画像処理部は、前記第1の光センサと前記第2の光センサの出力差により前記液晶素子の透過率を算出し、前記液晶ドライバを制御することを特徴とするレーザ投射表示装置。 - 請求項1に記載のレーザ投射表示装置において、
前記液晶素子は、前記レーザ光の前記走査部に対する入射側に配置したことを特徴とするレーザ投射表示装置。 - 請求項1に記載のレーザ投射表示装置において、
前記液晶素子は、前記レーザ光の前記走査部に対する出射側に配置したことを特徴とするレーザ投射表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2016061953A JP6694742B2 (ja) | 2016-03-25 | 2016-03-25 | レーザ投射表示装置 |
US15/432,005 US10349018B2 (en) | 2016-03-25 | 2017-02-14 | Laser projection display device |
CN201710082932.9A CN107231548B (zh) | 2016-03-25 | 2017-02-16 | 激光投射显示装置 |
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JP2016061953A JP6694742B2 (ja) | 2016-03-25 | 2016-03-25 | レーザ投射表示装置 |
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JP2017173715A JP2017173715A (ja) | 2017-09-28 |
JP6694742B2 true JP6694742B2 (ja) | 2020-05-20 |
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US (1) | US10349018B2 (ja) |
JP (1) | JP6694742B2 (ja) |
CN (1) | CN107231548B (ja) |
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JP6441966B2 (ja) * | 2015-01-30 | 2018-12-19 | 株式会社日立エルジーデータストレージ | レーザ投射表示装置、及びそれに用いるレーザ光源駆動部の制御方法 |
JP6885735B2 (ja) * | 2017-01-23 | 2021-06-16 | 浜松ホトニクス株式会社 | 走査装置 |
CN107991769B (zh) * | 2018-01-12 | 2020-07-10 | 凝辉(天津)科技有限责任公司 | 二维扫描器件 |
JPWO2019163215A1 (ja) * | 2018-02-22 | 2021-02-25 | マクセル株式会社 | 画像形成装置 |
JP6715484B2 (ja) * | 2018-03-29 | 2020-07-01 | パナソニックIpマネジメント株式会社 | 画像表示システム、画像表示方法、画像表示プログラム、移動体 |
JP6757910B2 (ja) | 2018-03-29 | 2020-09-23 | パナソニックIpマネジメント株式会社 | 画像表示システム、移動体 |
JP7164405B2 (ja) * | 2018-11-07 | 2022-11-01 | 日立チャネルソリューションズ株式会社 | 画像読取り装置及び方法 |
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JP5842419B2 (ja) * | 2011-07-06 | 2016-01-13 | 日本精機株式会社 | ヘッドアップディスプレイ装置 |
JP5849479B2 (ja) * | 2011-07-12 | 2016-01-27 | ソニー株式会社 | 照明装置および表示装置 |
JP5857599B2 (ja) * | 2011-09-30 | 2016-02-10 | セイコーエプソン株式会社 | スクリーンおよび画像表示システム |
JP5958146B2 (ja) * | 2012-07-23 | 2016-07-27 | セイコーエプソン株式会社 | プロジェクターおよびプロジェクターの制御方法 |
US9345103B1 (en) * | 2013-01-07 | 2016-05-17 | Amazon Technologies, Inc. | Non-linear lighting system brightness control for a user device |
CN103220535A (zh) * | 2013-05-17 | 2013-07-24 | 天津芬奇动视文化传播有限公司 | 一种非羽化映射曲线模型 |
JP6387589B2 (ja) * | 2013-08-30 | 2018-09-12 | 株式会社リコー | 画像形成装置、車両、及び画像形成装置の制御方法 |
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