JP6199980B2 - 走査ビームの強度変調 - Google Patents
走査ビームの強度変調 Download PDFInfo
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- JP6199980B2 JP6199980B2 JP2015536793A JP2015536793A JP6199980B2 JP 6199980 B2 JP6199980 B2 JP 6199980B2 JP 2015536793 A JP2015536793 A JP 2015536793A JP 2015536793 A JP2015536793 A JP 2015536793A JP 6199980 B2 JP6199980 B2 JP 6199980B2
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
-
- 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
- G09G3/02—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
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
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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
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
-
- 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
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
-
- 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
- G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
-
- 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
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2380/00—Specific applications
- G09G2380/10—Automotive applications
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2044—Display of intermediate tones using dithering
- G09G3/2051—Display of intermediate tones using dithering with use of a spatial dither pattern
-
- 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
- G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/346—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on modulation of the reflection angle, e.g. micromirrors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Mechanical Optical Scanning Systems (AREA)
Description
101 ノード/ビデオデータ
102 ビデオ処理部
104 画素駆動発生器(画素駆動生成器)
120 デジタル−アナログ変換器(DAC)
130 光源
160 微小電気機械システム(MEMS)装置
162 走査ミラー
180 画像平面
182 領域
184 領域
186 領域
192 ミラー制御回路
193 ノード
1100 モバイル機器
1101 走査式プロジェクタ/投影装置
1110 無線インターフェイス
1120 プロセッサ
1130 メモリ
1200 モバイル機器
1202 音声ポート
1204 制御ボタン
1206 カードスロット
1208 A/Vポート
1210 ディスプレイ
1220 キーパッド
1400 眼鏡型機器
1500 ゲーム機器
1541 バッテリ
1542 トリガー
1543 診断用ライト
1544 触覚インターフェイス
1545 マイクロホン
1546 無線式ヘッドホン
1547 バイノーラル式マイクロホン
1549 ハウジング
Claims (11)
- レーザ光源と、
前記レーザ光源からの光を反射するための、少なくとも一つの軸上で正弦波状のパターンを走査する走査ミラーと、
固定周波数のDACクロックを受信し、画素を表すデジタル駆動値を受信し、前記レーザ光源をアナログ信号で駆動する、デジタル−アナログ変換器(DAC)と、
前記デジタル駆動値を発生させる画素値の発生器であって、ビームの角速度が遅くなった時にレーザ駆動信号の継続時間を前記固定周波数のDACクロックの周期よりも短くすることを特徴とする画素値発生器と、
を備えており、
前記デジタル−アナログ変換器がゼロ復帰(RTZ)機能を含んでおり、且つ前記画素値発生器が、ゼロ復帰を実行する制御信号で前記デジタル−アナログ変換器を駆動しており、
前記デジタル−アナログ変換器が、ゼロ復帰によって、DACクロック周期の前半又は後半の少なくとも一方で、レーザ駆動を空白化していることを特徴とする走査式レーザプロジェクタ。 - 前記デジタル−アナログ変換器が、前記DACクロック周期の前半または後半のいずれか一方に対応する期間で前記レーザ駆動を空白化し、隣接する2つのレーザ駆動継続時間を結合してレーザ駆動継続時間をDACクロック周期と同一化しており、
さらに前記デジタル−アナログ変換器が、レーザ駆動信号の振幅を一定に保っていることを特徴とする請求項1に記載の走査式レーザプロジェクタ。 - 画素を表示するために変調されたレーザビームを第一の軸上で共振走査し、
前記ビームの角速度が遅くなるときレーザビーム変調のデューティサイクルが減じられ、
固定周波数クロックのいくつかの周期に亘ってレーザビームの光源を駆動するためのデジタル−アナログ変換器(DAC)を備えており、前記デジタル−アナログ変換器がゼロ復帰(RTZ)機能を備えており、画素値発生器がゼロ復帰を実行する制御信号で前記デジタル−アナログ変換器を駆動していることを特徴とする走査式レーザプロジェクタ。 - 前記デューティサイクルが減じられたとき、前記変調されたレーザビームの振幅が増やされることを特徴とする請求項3に記載の走査式レーザプロジェクタ。
- それぞれの画素が、同数の周期で描かれることを特徴とする請求項3に記載の走査式レーザプロジェクタ。
- すべての画素が同数の周期で描かれるわけではないことを特徴とする請求項3に記載の走査式レーザプロジェクタ。
- 固定周波数クロックのより少ない周期数に亘って前記レーザ光源を駆動することによって、前記デューティサイクルが減じられることを特徴とする請求項3に記載の走査式レーザプロジェクタ。
- 固定周波数クロックの部分的周期に亘って前記レーザ光源を駆動することによって、前記デューティサイクルが減じられることを特徴とする請求項3に記載の走査式レーザプロジェクタ。
- 固定周波数クロックの部分的周期に亘って前記レーザ光源が駆動されたとき、前記変調したレーザビームの振幅が増やされることを特徴とする請求項8に記載の走査式レーザプロジェクタ。
- ビデオ情報を受信可能な無線受信器と、
前記ビデオ情報を表示するための走査式レーザプロジェクタであって、画素を描くために、変調されたレーザビームを第一の軸上で共振走査する走査ミラーを含む走査式レーザプロジェクタと、を備え、
走査式レーザプロジェクタが、固定周波数クロックのいくつかの周期に亘ってレーザビームの光源を駆動するためのデジタル−アナログ変換器(DAC)を備えており、前記デジタル−アナログ変換器がゼロ復帰(RTZ)機能を備えており、画素値発生器がゼロ復帰を実行する制御信号で前記デジタル−アナログ変換器を駆動しており、
前記ビームの角速度が遅くなるとき前記レーザビーム変調のデューティサイクルが減じられることを特徴とするモバイル機器。 - 携帯電話を含むことを特徴とする請求項10に記載のモバイル機器。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/650,768 | 2012-10-12 | ||
US13/650,768 US8840255B2 (en) | 2012-10-12 | 2012-10-12 | Scanned beam intensity modulation using amplitude and drive duty cycle |
PCT/US2013/061716 WO2014058617A1 (en) | 2012-10-12 | 2013-09-25 | Scanned beam intensity modulation |
Publications (2)
Publication Number | Publication Date |
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JP2015536472A JP2015536472A (ja) | 2015-12-21 |
JP6199980B2 true JP6199980B2 (ja) | 2017-09-20 |
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Application Number | Title | Priority Date | Filing Date |
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JP2015536793A Active JP6199980B2 (ja) | 2012-10-12 | 2013-09-25 | 走査ビームの強度変調 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8840255B2 (ja) |
EP (1) | EP2907127B1 (ja) |
JP (1) | JP6199980B2 (ja) |
KR (1) | KR102100112B1 (ja) |
CN (1) | CN104737071B (ja) |
WO (1) | WO2014058617A1 (ja) |
Families Citing this family (9)
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JP6119201B2 (ja) * | 2012-11-08 | 2017-04-26 | ソニー株式会社 | 制御装置、制御方法、駆動装置、及び電子機器 |
WO2015173942A1 (ja) * | 2014-05-16 | 2015-11-19 | 日立マクセル株式会社 | 走査型表示装置 |
US9736439B2 (en) * | 2014-09-09 | 2017-08-15 | Microvision, Inc. | Laser diode voltage source controlled by video look-ahead |
US10277873B2 (en) | 2016-01-26 | 2019-04-30 | Maradin Technologies Ltd. | Apparatus and methods for dimming coherent light sources |
US9766060B1 (en) * | 2016-08-12 | 2017-09-19 | Microvision, Inc. | Devices and methods for adjustable resolution depth mapping |
US10313645B1 (en) * | 2018-01-19 | 2019-06-04 | Microsoft Technology Licensing, Llc | Variable emission period for scanned-beam display |
CN108957738B (zh) * | 2018-07-04 | 2021-08-24 | 歌尔光学科技有限公司 | 激光投影方法及设备 |
US10474296B1 (en) * | 2018-07-12 | 2019-11-12 | Microvision, Inc. | Laser scanning devices and methods with touch detection |
US11545082B1 (en) | 2022-04-22 | 2023-01-03 | Stmicroelectronics S.R.L. | Method for hybrid pulse amplitude and width modulation in led drivers for display panels |
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JP4929738B2 (ja) | 2005-04-18 | 2012-05-09 | セイコーエプソン株式会社 | 光走査装置、光走査装置の制御方法及び画像表示装置 |
US7511771B2 (en) | 2005-10-31 | 2009-03-31 | Symbol Technologies, Inc. | Color image projection system and method |
US20090160833A1 (en) * | 2007-12-21 | 2009-06-25 | Microvision, Inc. | Laser Projection White Balance Tracking |
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JP5481258B2 (ja) * | 2010-04-05 | 2014-04-23 | 日立コンシューマエレクトロニクス株式会社 | レーザー照射による画像表示装置 |
WO2011135848A1 (ja) | 2010-04-28 | 2011-11-03 | パナソニック株式会社 | 走査型画像表示装置 |
JP5665570B2 (ja) * | 2011-01-27 | 2015-02-04 | 京セラ株式会社 | 電子機器 |
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-
2012
- 2012-10-12 US US13/650,768 patent/US8840255B2/en active Active
-
2013
- 2013-09-25 EP EP13845743.7A patent/EP2907127B1/en active Active
- 2013-09-25 WO PCT/US2013/061716 patent/WO2014058617A1/en active Application Filing
- 2013-09-25 JP JP2015536793A patent/JP6199980B2/ja active Active
- 2013-09-25 KR KR1020157011856A patent/KR102100112B1/ko active IP Right Grant
- 2013-09-25 CN CN201380053466.1A patent/CN104737071B/zh active Active
Also Published As
Publication number | Publication date |
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KR20150070221A (ko) | 2015-06-24 |
JP2015536472A (ja) | 2015-12-21 |
KR102100112B1 (ko) | 2020-04-14 |
EP2907127A4 (en) | 2015-08-19 |
CN104737071B (zh) | 2016-10-19 |
EP2907127B1 (en) | 2019-12-04 |
EP2907127A1 (en) | 2015-08-19 |
US20140104501A1 (en) | 2014-04-17 |
WO2014058617A1 (en) | 2014-04-17 |
CN104737071A (zh) | 2015-06-24 |
US8840255B2 (en) | 2014-09-23 |
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