EP2912655A1 - Procédé et agencement d'adaptation d'une fréquence de lignes d'un signal numérique d'un système de projecteur - Google Patents

Procédé et agencement d'adaptation d'une fréquence de lignes d'un signal numérique d'un système de projecteur

Info

Publication number
EP2912655A1
EP2912655A1 EP13753613.2A EP13753613A EP2912655A1 EP 2912655 A1 EP2912655 A1 EP 2912655A1 EP 13753613 A EP13753613 A EP 13753613A EP 2912655 A1 EP2912655 A1 EP 2912655A1
Authority
EP
European Patent Office
Prior art keywords
image
line
resolution
frequency
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13753613.2A
Other languages
German (de)
English (en)
Inventor
David SLOGSNAT
Alexander Ehlert
Frank Fischer
Gael Pilard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2912655A1 publication Critical patent/EP2912655A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7458—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of deformable mirrors, e.g. digital micromirror device [DMD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
    • 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]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3188—Scale or resolution adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0414—Vertical resolution change

Definitions

  • the present invention relates to a method and apparatus for adjusting a line frequency of a digital signal of a projector device.
  • US 2010 0128 169 A1 describes a frame rate converter and a method of projecting an HD standard picture.
  • the frame frequency converter described therein is designed to convert frame rates for projecting the image by storing a frame and interpolating the stored frame.
  • US 2010 00 259 675 A1 describes an image frequency conversion device for performing image rate conversion for image data having a different temporal image structure.
  • DE 26 52 935 B2 describes a method for frame rate conversion, wherein the signal sequences, each of which corresponds to a single image or a field of an image sequence, stored at a predetermined memory frequency and converted the stored signal sequences with a different memory frequency of the playback frequency in pictures or fields become; wherein signal sequences in a first
  • Memory device whose storage capacity is at least one image or partial image of the image sequence, stored at a predetermined memory speed and at an increased output speed, d. H. be output compressed in time; and wherein signal sequences in a second memory device whose storage capacity likewise corresponds to at least one image or partial image of the image sequence are stored at a predetermined signal repetition frequency and increased with one
  • the present invention provides a method for adjusting a line frequency of a digital signal of a projector device with the following method steps:
  • Mirror means of the projector means and a storage capacity of a line buffer of an image processing means Detecting a first image resolution of a video signal of a video source device by the image processing device; and calculating a second image resolution with an adapted vertical resolution of the data signal on the basis of the acquired first image resolution of the video signal as a function of the at least one natural mechanical frequency of the mirror device and the storage capacity of a line buffer by the image processing device
  • the present invention provides an arrangement for adjusting a
  • Line frequency of a digital signal of a projector device with: a
  • Video source device for providing a video signal with a first one
  • Image resolution image processing means for detecting the first image resolution of the video signal of the video source means and calculating a second one
  • the idea of the invention is to simplify the complex image data processing required for frame rate conversion and to reduce the required buffer space. This reduces on the one hand the costs incurred during production and on the other hand the power consumption occurring during operation.
  • Projection area projected by the projector device not reduced to the total time.
  • the projector device is operated at a projection frequency, which is advantageously adapted to the mechanical resonance frequencies of the MEMS micromirrors. Although these settings are already set favorably during production, a deviation due to aging and temperature influences can occur.
  • the present invention utilizes an increased and adaptable number of imaged lines for realizing a full frame rate.
  • the new image data with the increased number of mapped lines is calculated by interpolating the original image data accordingly.
  • Another advantage of the invention is that the number of lines imaged is calculated dynamically during operation to compensate for device-specific effects with temperature or aging.
  • the main advantage of this method is that the video source can operate with standard timing parameters while synchronizing the clock rates within the projector setup independently.
  • a further advantage of the invention lies in the fact that no complete frame buffer or at least only a fraction of a frame buffer is required as image buffer in order to buffer the non-synchronized video stream. This is an important contribution to reducing system costs.
  • the storage capacity of the line buffer corresponds to a memory requirement of a picture line of the video signal
  • Video source device is adjusted. This reduces the memory requirement even at high image resolutions.
  • the data on the at least one mechanical natural frequency of the mirror device of the projector device and on the storage capacity of the line buffer in one Memory device of the image processing device are stored. This allows the integration of the projector device in mobile devices or other portable electronic devices in a simple manner.
  • Calculating the second image resolution with the adjusted vertical resolution based on the detected first image resolution of the video signal in response to horizontal and / or vertical retrace times of the mirror device is made. This advantageously allows to minimize the dead times of the projector device.
  • Caching an image line of the video signal of the video source device is made in the line buffer.
  • a desired adjustment of the clock rate can be made very effective and secure.
  • the adapted vertical resolution of the data signal is achieved by an interpolation of the first image resolution.
  • the data provided via the mechanical natural frequencies of the mirror device of the projector device are adapted to temperature and / or aging-related changes in the mirror device of the projector device.
  • FIG. 1 is a diagram showing a flowchart of a method of adjusting a line frequency of a digital signal of a projector device according to another embodiment of the present invention
  • Fig. 2 is an illustration of an arrangement for adjusting a line frequency of a digital signal of a projector device according to another embodiment of the present invention.
  • FIG. 3 is a schematic representation of different image resolution modes for comparing the projected image resolution with the transmitted image resolution according to another embodiment of the present invention.
  • FIG. 1 is a diagram showing a flowchart of a method of adjusting a line frequency of a digital signal of a projector device according to another embodiment of the present invention.
  • data S1 is provided via at least one mechanical natural frequency of a mirror device SE of the projector device PE and via a storage capacity of a line buffer ZP of an image processing device VDC.
  • detection S2 of a first image resolution of a video signal VS of a video source device VE is performed by the image processing device VDC.
  • FIG. 2 is an illustration of an arrangement for adjusting a line frequency of a digital signal of a projector device according to another embodiment of the present invention.
  • An arrangement PA for adjusting a line frequency of a digital signal DP of a projector device PE comprises a video source device VE, a
  • Image processing device VDC and a projector device PE are Image processing devices VDC and a projector device PE.
  • the projector device PE comprises a laser device LE for generating a laser beam with which an image B is projected within a projection cone PK.
  • the laser beam is deflected by a mirror device SE periodically in the horizontal and vertical directions.
  • the image processing device VDC comprises, for example, a memory device RAM, an image processor BP and a line buffer ZP.
  • the image processing device VDC is further coupled to the video source device VE, which is designed to provide a video signal VS having a first image resolution and a first clock rate.
  • the image processing device VDC is designed to detect the first image resolution of the video signal VS of the video source device VE. Furthermore, the
  • Image processing device VDC for calculating a second image resolution with an adapted vertical resolution of the data signal DP on the basis of the detected first
  • Image resolution of the video signal VS as a function of at least one mechanical natural frequency of a mirror device SE and a storage capacity of a
  • the projector device PE is configured to project the digital signal DP with the line frequency of the digital signal DP adjusted by the calculation.
  • FIG. 3 shows a schematic representation of different ones
  • Image resolution modes for comparing the projected image resolution with the transmitted image resolution according to another embodiment of the present invention.
  • the imageable by the mirror device SE surface is defined by a total width GB and a total height GH of a virtual image area VB.
  • a width B and a height H correspond to the visible image area VF of the projected image B.
  • a horizontal leading edge HVB and a horizontal trailing edge HHB, and a vertical leading edge WH and a vertical trailing edge VHH form an unprojected dead area BZ.
  • the pixel clock rate fpxi_ is calculated from the product of the width B and the height H of the image B and a frame rate fps of the video signal VS of a video source device VE:
  • ⁇ PXL GB ⁇ GH ⁇ fps
  • the total width GB and the total height GH are made up as follows:
  • a horizontal line frequency fu ne of the data signal DP is given by: GB ⁇ fpS
  • the video source device VE has a first
  • the projector has a different second line rate.
  • the interpolation of the source resolution or the first image resolution to the projector resolution or to the second image resolution results in an effective, second line frequency.
  • the memory requirement of the line buffer ZP is proportional to the difference between the first horizontal line frequency and the second horizontal line frequency.
  • the method also adjusts the line frequencies of the video signal VS and the data signal DP, wherein an oversampling factor indicates the ratio of the respective line frequencies of the video signal VS and the data signal DP.
  • the line frequencies of the data signal DP are, for example, at the lower end of the tolerances of the projector device PE.
  • the buffer size of the line buffer ZP is considered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Graphics (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Projection Apparatus (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

L'invention concerne un procédé d'adaptation d'une fréquence de lignes d'un signal numérique (DP) d'un système de projecteur (PE), comprenant les étapes suivantes : obtention (S1) de données concernant au moins une fréquence propre mécanique d'un système de miroir (SE) du système de projecteur (PE) et une capacité de stockage d'un tampon de lignes (ZP) d'un système de traitement d'images (VDC); détection (S2) par le système de traitement d'images (VDC) d'une première résolution d'image d'un signal vidéo (VS) d'un système de source vidéo (VE); et calcul (S3) par le système de traitement d'images (VDC) d'une deuxième résolution d'image ayant une résolution verticale du signal de données (DP) adaptée à partir de la première résolution d'image détectée du signal vidéo (VS) en fonction de la ou des fréquences propres mécaniques du système de miroir (SE) et de la capacité de stockage d'un tampon de lignes (ZP) afin d'adapter la fréquence de lignes du signal numérique (DP) du système de projecteur (PE).
EP13753613.2A 2012-10-26 2013-08-22 Procédé et agencement d'adaptation d'une fréquence de lignes d'un signal numérique d'un système de projecteur Withdrawn EP2912655A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012219627.7A DE102012219627A1 (de) 2012-10-26 2012-10-26 Verfahren und Anordnung zum Anpassen einer Zeilenfrequenz eines Digitalsignals einer Projektoreinrichtung
PCT/EP2013/067469 WO2014063849A1 (fr) 2012-10-26 2013-08-22 Procédé et agencement d'adaptation d'une fréquence de lignes d'un signal numérique d'un système de projecteur

Publications (1)

Publication Number Publication Date
EP2912655A1 true EP2912655A1 (fr) 2015-09-02

Family

ID=49080859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13753613.2A Withdrawn EP2912655A1 (fr) 2012-10-26 2013-08-22 Procédé et agencement d'adaptation d'une fréquence de lignes d'un signal numérique d'un système de projecteur

Country Status (8)

Country Link
US (1) US20150288918A1 (fr)
EP (1) EP2912655A1 (fr)
JP (1) JP2016502131A (fr)
KR (1) KR20150079625A (fr)
AU (1) AU2013337035A1 (fr)
DE (1) DE102012219627A1 (fr)
TW (1) TWI606730B (fr)
WO (1) WO2014063849A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112612433B (zh) * 2020-12-09 2023-12-01 深圳乐播科技有限公司 一种竖屏视频的投屏方法、设备及系统

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
DE2652935C3 (de) 1976-11-22 1984-09-27 Bts-Systementwicklungs Gmbh, 1000 Berlin Verfahren und Anordnung zur Bildfrequenzwandlung
JP2988457B2 (ja) * 1997-11-10 1999-12-13 日本電気株式会社 ディスプレイ装置の駆動装置及び方法
JP2007286423A (ja) * 2006-04-18 2007-11-01 Brother Ind Ltd 光走査装置及び画像表示装置並びに網膜走査型画像表示装置
US8223161B2 (en) * 2007-08-22 2012-07-17 Microvision, Inc. Electronic alignment of primary color pixels in a scanned display
KR101498207B1 (ko) 2008-11-26 2015-03-03 삼성전자주식회사 초고해상도 영상의 프레임 레이트 변환 장치 및 방법
JP5319372B2 (ja) 2009-04-09 2013-10-16 キヤノン株式会社 フレームレート変換装置及びフレームレート変換方法
DE102009058762A1 (de) * 2009-12-14 2011-06-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Ablenkeinrichtung für eine Projektionsvorrichtung, Projektionsvorrichtung zum Projizieren eines Bildes und Verfahren zum Ansteuern einer Ablenkeinrichtung für eine Projektionsvorrichtung
US8371698B2 (en) * 2010-04-12 2013-02-12 Microvision, Inc. Scanning projector with vertical interpolation onto horizontal trajectory
WO2012011183A1 (fr) * 2010-07-22 2012-01-26 パイオニア株式会社 Appareil de génération d'image

Non-Patent Citations (2)

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See also references of WO2014063849A1 *

Also Published As

Publication number Publication date
WO2014063849A1 (fr) 2014-05-01
US20150288918A1 (en) 2015-10-08
DE102012219627A1 (de) 2014-04-30
JP2016502131A (ja) 2016-01-21
TWI606730B (zh) 2017-11-21
KR20150079625A (ko) 2015-07-08
TW201429249A (zh) 2014-07-16
AU2013337035A1 (en) 2015-06-11

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