DE19906608A1 - Colour LCD image generator with sequentially generated basic colours with rapid interchange for reproduction of moving or still images - Google Patents
Colour LCD image generator with sequentially generated basic colours with rapid interchange for reproduction of moving or still imagesInfo
- Publication number
- DE19906608A1 DE19906608A1 DE19906608A DE19906608A DE19906608A1 DE 19906608 A1 DE19906608 A1 DE 19906608A1 DE 19906608 A DE19906608 A DE 19906608A DE 19906608 A DE19906608 A DE 19906608A DE 19906608 A1 DE19906608 A1 DE 19906608A1
- Authority
- DE
- Germany
- Prior art keywords
- color
- colour
- lcd
- image generator
- reproduction
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133621—Illuminating devices providing coloured light
-
- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133621—Illuminating devices providing coloured light
- G02F1/133622—Colour sequential illumination
Abstract
Description
Es ist bekannt, farbige Bilder mit Hilfe von Flüssig kristallen zu erzeugen, indem für jede Grundfarbe ein Teilbild generiert wird. Diese simultan erzeugten Bilder werden übereinandergelagert, so daß der Eindruck des farbigen Gesamtbildes entsteht. Bei Bildschirmen wird dies z. B. durch Nebeneinanderordnung verschiedenfarbiger Bildpixel erreicht; LCD-Projektoren erzeugen drei mono chromatische Teilbilder in den drei additiven Grundfar ben und bringen diese zur Überlagerung.It is known to color images with the help of liquid generate crystals by adding one for each primary color Drawing file is generated. These simultaneously generated images are superimposed so that the impression of colored overall picture arises. With screens this z. B. by juxtaposition of different colors Image pixels reached; LCD projectors produce three mono chromatic drawing files in the three additive basic colors ben and bring these to superimpose.
Der im Patentanspruch angegebenen Erfindung liegt das Problem zugrunde, den Bauaufwand von LCD-Bildschirmen und -Projektoren zu verringern bzw. die Bildauflösung von LCD-Farbbildschirmen zu erhöhen.The invention specified in the claim is Problem based on the construction work of LCD screens and projectors to reduce or the image resolution of LCD color screens to increase.
Dieses Problem wird durch die im Patentanspruch 1 aufge führten Merkmale für LCD-Bildschirme gelöst indem farbige Bilder unter Verwendung eines Schwarz-Weiß LCD-Bildschir mes erzeugt werden, wenn als Hintergrundbeleuchtung träg heitslos arbeitende Leuchtmittel in den drei additiven Grundfarben zur Anwendung kommen. Dabei wechselt die Bildschirmbeleuchtung bei bewegten Bildern mindestens dreimal pro Einzelbild, also ≧ 75/sek zwischen den drei Grundfarben wobei dem S/W-Bildschirm das dem der jeweils aktiven Farbe entsprechende Helligkeitsmuster zugeordnet wird. Aufgrund der Trägheit des menschlichen Auges werden die drei Teilbilder nach dem Prinzip des Farbkreisels zum farbigen Gesamtbild zusammengesetzt. This problem is solved by the in claim 1 led features for LCD screens solved by colored Images using a black and white LCD screen mes generated when backlit as sluggish bulbs working without safety in the three additive Primary colors are used. The changes At least screen lighting for moving images three times per frame, i.e. ≧ 75 / sec between the three Basic colors with the B / W screen that of each corresponding brightness pattern assigned to active color becomes. Because of the sluggishness of the human eye the three partial images according to the principle of the color top colored overall picture.
Die mit der Erfindung erzielten Vorteile bestehen darin, daß nur noch eine Bildpunktmatrix statt Dreier benötigt wird, um ein farbiges Bild zu erzeugen. Sind die Bild punkte einer konventionellen Lösung nebeneinander ange ordnet, ergibt sich demgegenüber zusätzlich der Vorteil einer dreifach höheren Bildauflösung da konventionell drei Farbpixel benötigt werden, um einen farbigen Bild punkt darzustellen.The advantages achieved by the invention are that only one pixel matrix is needed instead of three to create a colored image. Are the picture points of a conventional solution side by side orders, there is also the additional advantage a three times higher image resolution since conventional Three color pixels are needed to make a colored picture point.
Eine Ausgestaltungsmöglichkeit für LCD-Projektoren ist im Patentanspruch 2 angegeben. Hier wird der Farbwechsel da durch erreicht, daß eine Farbscheibe im Strahlengang eines S/W-LCD Projektors synchron mit den Bildinformationen für die entsprechenden Farben rotiert. Bei dieser Lösung wird nur eine Schwarz-Weiß Projektionsröhre benötigt.A design option for LCD projectors is in Claim 2 specified. Here the color change is there achieved by a color disc in the beam path of a B / W LCD projector in sync with the image information for the corresponding colors rotated. With this solution only a black and white projection tube is required.
Je ein Ausführungsbeispiel der Erfindung ist in den Zeich nungen dargestellt und wird im Folgenden näher beschrieben.One embodiment of the invention is shown in the drawing shown and is described in more detail below.
Es zeigt Fig. 1 die Ausführung der Erfindung mittels Leucht dioden in den Farben Rot, Grün und Blau. Da LEDs auch im Pulsbetrieb bis zu einigen MHz betrieben werden können, ist die Helligkeit der einzelnen Farben durch Veränderung der Zeiten der Hell- und Dunkelphasen bei hohen Pulsfreuqenzen veränderbar.It shows Fig. 1, the embodiment of the invention by means of light-emitting diodes of the colors red, green and blue. Since LEDs can also be operated in pulse mode up to a few MHz, the brightness of the individual colors can be changed by changing the times of the light and dark phases at high pulse frequencies.
Die Strahlung der LEDs gelangt in den lichtleitenden Kunst stoff. Dieser ist zweckmäßigerweise auf der Rückseite ver spiegelt und auf der dem Bildschirm zugewandten Seite auf gerauht um eine möglichst gleichmäßige Ausleuchtung des Schirmes zu gewährleisten.The radiation from the LEDs reaches the light-conducting art material. This is conveniently ver on the back reflects and on the side facing the screen roughened for the most uniform possible illumination of the To ensure the umbrella.
In Fig. 1b ist die Aufteilung der Bildinformation in die Farbanteile, ihre Lagerung in Zwischenspeicher und ihre Verknüpfung mit den entsprechenden Leuchteinheiten mittels des Taktgebers schematisch dargestellt.In Fig. 1b the division of the image information into the color components, their storage in the buffer and their linkage to the corresponding lighting units is shown schematically by means of the clock.
Es zeigt Fig. 2 die Ausführung der Erfindung als Projek tionsgerät. Hier rotiert eine Farbscheibe zwischen den Kondensorlinsen synchron zu den vom LCD-Schirm gezeigten Bildinhalten. Die Farbscheibe dient dabei gleichzeitig als Wärmefilter zum Schutz des Bildschirmes.It shows Fig. 2, the embodiment of the invention as projek tion device. Here, a colored disc rotates between the condenser lenses in sync with the image content shown on the LCD screen. The color disc also serves as a heat filter to protect the screen.
Die Fig. 2b zeigt die im Strahlengang rotierende Farb scheibe und den davor liegenden LCD-Schirm in der Aufsicht. Zwischen den drei für jeweils eine der drei additiven Grundfarben durchlässigen Filtern liegen lichtundurchläs sige Bereiche. Die Farbscheibe ist so mit dem Bildschirm synchronisiert, daß die jeweils durch diese Abschattungen abgedeckten Bildpunkte ihre Bildinhalte entsprechend des nachfolgenden Filters ändern. FIG. 2b shows the rotating disk in the optical path and the color LCD screen lying in front in plan view. There are opaque areas between the three filters, which are permeable to one of each of the three additive primary colors. The color disk is synchronized with the screen in such a way that the pixels covered by these shadows change their image contents in accordance with the following filter.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19906608A DE19906608A1 (en) | 1999-02-17 | 1999-02-17 | Colour LCD image generator with sequentially generated basic colours with rapid interchange for reproduction of moving or still images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19906608A DE19906608A1 (en) | 1999-02-17 | 1999-02-17 | Colour LCD image generator with sequentially generated basic colours with rapid interchange for reproduction of moving or still images |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19906608A1 true DE19906608A1 (en) | 2000-08-31 |
Family
ID=7897775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19906608A Ceased DE19906608A1 (en) | 1999-02-17 | 1999-02-17 | Colour LCD image generator with sequentially generated basic colours with rapid interchange for reproduction of moving or still images |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19906608A1 (en) |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63316590A (en) * | 1987-06-19 | 1988-12-23 | Hitachi Ltd | Projection type display |
JPH0336518A (en) * | 1989-07-04 | 1991-02-18 | Ise Electronics Corp | Color display panel and its driving method |
JPH054026Y2 (en) * | 1986-11-20 | 1993-02-01 | ||
JPH0580716A (en) * | 1991-09-20 | 1993-04-02 | Nippon Telegr & Teleph Corp <Ntt> | Color liquid crystal display system |
US5359345A (en) * | 1992-08-05 | 1994-10-25 | Cree Research, Inc. | Shuttered and cycled light emitting diode display and method of producing the same |
JPH0736427A (en) * | 1993-07-15 | 1995-02-07 | Canon Inc | Display device |
JPH08211361A (en) * | 1995-02-06 | 1996-08-20 | Casio Electron Mfg Co Ltd | Transmission type display device |
JPH09101497A (en) * | 1995-10-04 | 1997-04-15 | Buraito Kenkyusho:Kk | Liquid crystal display device |
JPH09185010A (en) * | 1995-12-28 | 1997-07-15 | Shimadzu Corp | Display device |
US5668572A (en) * | 1995-05-26 | 1997-09-16 | Texas Instruments Incorporated | Color temperature compensation for digital display system with color wheel |
JPH09265091A (en) * | 1996-03-29 | 1997-10-07 | Toyoda Gosei Co Ltd | Liquid crystal display device |
JPH113053A (en) * | 1997-06-11 | 1999-01-06 | Miyota Co Ltd | Color liquid crystal display device |
-
1999
- 1999-02-17 DE DE19906608A patent/DE19906608A1/en not_active Ceased
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH054026Y2 (en) * | 1986-11-20 | 1993-02-01 | ||
JPS63316590A (en) * | 1987-06-19 | 1988-12-23 | Hitachi Ltd | Projection type display |
JPH0336518A (en) * | 1989-07-04 | 1991-02-18 | Ise Electronics Corp | Color display panel and its driving method |
JPH0580716A (en) * | 1991-09-20 | 1993-04-02 | Nippon Telegr & Teleph Corp <Ntt> | Color liquid crystal display system |
US5359345A (en) * | 1992-08-05 | 1994-10-25 | Cree Research, Inc. | Shuttered and cycled light emitting diode display and method of producing the same |
JPH0736427A (en) * | 1993-07-15 | 1995-02-07 | Canon Inc | Display device |
JPH08211361A (en) * | 1995-02-06 | 1996-08-20 | Casio Electron Mfg Co Ltd | Transmission type display device |
US5668572A (en) * | 1995-05-26 | 1997-09-16 | Texas Instruments Incorporated | Color temperature compensation for digital display system with color wheel |
JPH09101497A (en) * | 1995-10-04 | 1997-04-15 | Buraito Kenkyusho:Kk | Liquid crystal display device |
JPH09185010A (en) * | 1995-12-28 | 1997-07-15 | Shimadzu Corp | Display device |
JPH09265091A (en) * | 1996-03-29 | 1997-10-07 | Toyoda Gosei Co Ltd | Liquid crystal display device |
JPH113053A (en) * | 1997-06-11 | 1999-01-06 | Miyota Co Ltd | Color liquid crystal display device |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8131 | Rejection |