DE502473C - Projection screen with paint application - Google Patents

Projection screen with paint application

Info

Publication number
DE502473C
DE502473C DEH118858D DEH0118858D DE502473C DE 502473 C DE502473 C DE 502473C DE H118858 D DEH118858 D DE H118858D DE H0118858 D DEH0118858 D DE H0118858D DE 502473 C DE502473 C DE 502473C
Authority
DE
Germany
Prior art keywords
projection screen
paint application
screen
paint
red
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.)
Expired
Application number
DEH118858D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE502473C publication Critical patent/DE502473C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • 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
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Description

Projektionsschirm mit Farbauftrag Der Gegenstand der vorliegenden Erfindung ist ein Projektionsschirm, insbesondere für Tageslichtprojektion von Bildern, die von der Rückseite des Schirmes her projiziert werden. Bisher wurden bei der Tageslichtprojektion Bilder auf Leinwand projiziert, die durch Behandlung mit Firnis, Gelatine, Ü1 und Fett transparent gemacht wurde.Projection screen with paint application The subject of the present Invention is a projection screen, in particular for daylight projection of images, projected from the back of the screen. So far, the Daylight projection projects images onto a screen that can be treated with varnish, Gelatine, Ü1 and fat was made transparent.

Man hat bereits vorgeschlagen, solcheLeinwandschirme durch einen Farbauftrag von Rot, Grün und Blau mit einem schmutzigbräunlichen Anstrich zu versehen. Diese Farbaufträge haben den Nachteil, daß, weil Grün aus Gelb und Blau zusammengesetzt wird, das Blau in der Farbmischung vorherrscht und infolgedessen die Wiedergabe von Farben ungünstig beeinflußt wird. Rote Farben erscheinen deshalb nicht rot, sondern mehr oder minder stark violett bzw. purpurn.It has already been proposed to paint such canvas screens of red, green and blue with a dirty brownish coat of paint. These Color applications have the disadvantage that because green is composed of yellow and blue the blue predominates in the color mixture and, consequently, the rendering is adversely affected by colors. Red colors therefore do not appear red, but more or less violet or purple.

In Gemäßheit der Erfindung wird ein Projektionsschirm durch eine schwach mattierte Unterlage gebildet, auf welcher eineMischung gleicher Mengen von rotem, gelbem und blauem Farbstoff aufgetragen ist. Als Unterlage wird transparente Leinwand, mattiertes Celluloid o. dgl. benutzt. Durch den Farbauftrag erhält die betreffende Oberfläche des Schirmes in der Draufsicht ein neutral graues Aussehen; bei der Beleuchtung von hinten ist der Schirm vollständig durchscheinend, und sämtliche Farben werden richtig wiedergegeben.In accordance with the invention, a projection screen becomes weak by one matted base on which a mixture of equal amounts of red, yellow and blue dye is applied. A transparent canvas is used as a base, Matted celluloid or the like used. Through the application of paint, the relevant The surface of the screen in plan view has a neutral gray appearance; in lighting from behind the screen is completely translucent and all colors become correctly reproduced.

Vorteilhaft verwendet man für den Farbauftrag die Anilinfarben Rot, Gelb und Blau. Der Auftrag der Farben kann beispielsweise durch Aufstreichen des mit Firnis o. dgl. angesetzten Farbgemisches auf die Oberfläche des Schirmes erfolgen. Auch einzeln lassen sich die Farben kurz hintereinander auftragen.It is advantageous to use the aniline colors red for the paint application, Yellow and blue. The paint can be applied, for example, by spreading the done with varnish or the like. Mixture of colors applied to the surface of the screen. The colors can also be applied individually in quick succession.

Claims (1)

PATENTANSPRUCH: Projektionsschirm mit Farbauftrag, dadurch gekennzeichnet, daß auf einer durchscheinenden oder mattierten Unterlage eine Mischung gleicher Mengen von rotem, gelbem und blauem Farbstoff aufgetragen ist.PATENT CLAIM: Projection screen with paint application, characterized in that that on a translucent or matt surface a mixture of the same Amounts of red, yellow and blue dye is applied.
DEH118858D 1928-01-26 1928-11-01 Projection screen with paint application Expired DE502473C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB502473X 1928-01-26

Publications (1)

Publication Number Publication Date
DE502473C true DE502473C (en) 1930-07-11

Family

ID=10455214

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH118858D Expired DE502473C (en) 1928-01-26 1928-11-01 Projection screen with paint application

Country Status (1)

Country Link
DE (1) DE502473C (en)

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