DE708941C - Method for viewing or projecting images generated on the screen of a cathode ray tube according to patent 698417 - Google Patents
Method for viewing or projecting images generated on the screen of a cathode ray tube according to patent 698417Info
- Publication number
- DE708941C DE708941C DEF86351D DEF0086351D DE708941C DE 708941 C DE708941 C DE 708941C DE F86351 D DEF86351 D DE F86351D DE F0086351 D DEF0086351 D DE F0086351D DE 708941 C DE708941 C DE 708941C
- Authority
- DE
- Germany
- Prior art keywords
- screen
- cathode ray
- viewing
- images generated
- ray tube
- 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
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 230000003595 spectral effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 4
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 claims description 3
- 229910021612 Silver iodide Inorganic materials 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 229940045105 silver iodide Drugs 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- FDZZZRQASAIRJF-UHFFFAOYSA-M malachite green Chemical compound [Cl-].C1=CC(N(C)C)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](C)C)C=C1 FDZZZRQASAIRJF-UHFFFAOYSA-M 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 238000001228 spectrum Methods 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WTDMXBFVAWMMQM-UHFFFAOYSA-M [Hg]I.[Ag] Chemical compound [Hg]I.[Ag] WTDMXBFVAWMMQM-UHFFFAOYSA-M 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- VXGJXEQMJMDLCZ-UHFFFAOYSA-M copper iodomercury Chemical compound [Cu].[Hg]I VXGJXEQMJMDLCZ-UHFFFAOYSA-M 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000002837 heart atrium Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/14—Screens on or from which an image or pattern is formed, picked up, converted or stored acting by discoloration, e.g. halide 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
- H04N5/7425—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 a dielectric deformable layer controlled by an electron beam, e.g. eidophor projector
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
Verfahren zum Betrachten oder Projizieren von auf dem Bildschirm einer Kathodenstrahlröhre gemäß Patent 698 417 erzeugten Bildern Im Hauptpatent 698 417 ist eine Kathodenstrahlröhre zur Aufzeichnung von Fernsehbildern oder Oszillogrammen ,auf einen nicht selbständig leuchtenden Bildschirm beschrieben, der :einen Stoff enthält, dessen Farbe temperaturabhängig ist, so daß er in Abhängigkeit von der, durch den Kathodenstrahl erzeugten Wärme seine Farbe ändert. Bei diesem Bildschirm wird also die Energie des auftreffenden Kathodenstrahls in Wärme umgewandelt und dadurch seine Farbe punktweise geändert. Das so entstehende, in verschiedene Farbschattierungen abgestufte Bild wird dann unter Beleuchtung durch eine Fremdlichtquelle betrachtet oder projiziert. Als temperaturabhängige Stoffe kommen für derartige Bildschirme z. B. Doppelsalze von S.chwermetalljodiden in Frage. Besonders geeignet sind Silber-Quecksilber-Jodid, Kupfer-Quecksilber-Jo.did u. dgl.A method of viewing or projecting on the screen of a cathode ray tube in accordance with Patent 698,417 images formed in the main patent 698 417 is a cathode ray tube for the recording of television images or oscillograms, described on a non-self-luminous display, which: contains a substance whose color is temperature-dependent, so that it changes its color depending on the heat generated by the cathode ray. With this screen, the energy of the incident cathode ray is converted into heat, thereby changing its color point by point. The resulting image, graduated in different shades of color, is then viewed or projected under illumination by an external light source. As temperature-dependent substances come for such screens z. B. double salts of heavy metal iodides in question. Silver-mercury-iodide, copper-mercury-iodide and the like are particularly suitable.
In vielen Fällen reicht nun der Kontrast der mit der vorgeschlagenen Kathodenstrahlröhre erzeugten Bilder nicht aus. Silberjodid ändert seine Farbe bei Erwärmung von Gelb bis Braun, so daß bei Betrachtung in weißem Licht nur eine geringe Kontraständerung der einzelnen Schirmelemente gegeneinander festzustellen ist. Die vorliegende Erfindung stellt ein verbessertes Verfahren dar zur Erzeugung und Betrachtung von Bildern mittels einer Kathodenstrahlröhre gemäß Patent 6984i7 und beruht auf der Erkenntnis, daß die Farbänderung, die das Schirmmaterial bei der Erwärinung erfährt, durch eine Verschiebung der Grenze des Absorptionsbereiches (Absorptionskante) bewirkt wird. Gemäß der Erfindung wird bei der Betrachtung oder Projektion des auf dem Schirm erzeugten Bildes der Bildschirm mittels einer Fremdlichtquelle beleuchtet, deren Licht den SpektralbLereich umfaßt, den die Grenze des Absorptionsbereiches bei der Erwärmung durchläuft. Auf diese Weise wird der Kontrast des empfangenen Bildes erheblich gesteigert, da der Anteil des durch die Absorptionsänderung nicht gesteuerten Spektralbereiches nur sehr gering ist.In many cases the contrast with the one proposed is sufficient Cathode ray tubes did not produce images. Silver iodide changes its color Warming from yellow to brown, so only slight when viewed in white light Change in contrast between the individual screen elements can be determined. the The present invention provides an improved method of generation and viewing of images using a cathode ray tube according to patent 6984i7 and is based on the knowledge that the color change that the screen material causes when it is heated experiences through a shift in the limit of the absorption range (absorption edge) is effected. According to the invention, when viewing or projecting the the image generated on the screen illuminates the screen by means of an extraneous light source, whose light comprises the spectral range which is the limit of the absorption range passes through when heating. This way the contrast of the received Image significantly increased, since the proportion of due to the change in absorption is not controlled spectral range is only very small.
Zur Erzielung derartigen farbigen Lichts kann man entweder Gasentladungslampen benutzen, die schon von sich aus Licht des Spektralbereiches, den die Grenze des Absorptionsbereiches durchläuft, aussenden, z. B. \atriumdampflampen bei Schirmmaterialien, deren Absorptionskante im Gelben liegt, oder man kann weißes Licht durch entsprechende Farbfilter auf bestimmte Spektralbereiche einschränken. Bei Silberjodid als Schirmmaterial hat sich als Filter eine wäßrige Lösung von Victoriagrün besonders bewährt.To achieve such colored light, either gas discharge lamps can be used use, which inherently light of the spectral range that the limit of the Absorption range passes through, emit, z. B. \ atrium vapor lamps for screen materials, whose absorption edge lies in the yellow, or you can use white light by corresponding Restrict color filters to certain spectral ranges. With silver iodide as shield material An aqueous solution from Victoria Green has proven to be particularly effective as a filter.
Die Verwendung von Flüssigkeitsfiltern hat noch den Vorteil daß man durch Kombination entsprechender Farbstoffe den Wellenlängenbereich des Fremdlichts bequem dem Tnterwall welches die Absorptionskante des Schirmstoffes bei der Erwärmung durchläuft, anpassen kann. Man erhält so eine möglichst breite spektrale Durchlässigkeitszone in einer möglichst günstigen spektralen Lage.The use of liquid filters still has the advantage that one the wavelength range of the external light by combining appropriate dyes comfortable to the inner wall, which is the absorption edge of the umbrella fabric when it is heated runs through, can adapt. In this way, the broadest possible spectral transmission zone is obtained in the most favorable spectral position possible.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF86351D DE708941C (en) | 1935-06-14 | 1939-02-11 | Method for viewing or projecting images generated on the screen of a cathode ray tube according to patent 698417 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE807322X | 1935-06-14 | ||
| DEF86351D DE708941C (en) | 1935-06-14 | 1939-02-11 | Method for viewing or projecting images generated on the screen of a cathode ray tube according to patent 698417 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE708941C true DE708941C (en) | 1941-08-01 |
Family
ID=25948834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEF86351D Expired DE708941C (en) | 1935-06-14 | 1939-02-11 | Method for viewing or projecting images generated on the screen of a cathode ray tube according to patent 698417 |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE708941C (en) |
-
1939
- 1939-02-11 DE DEF86351D patent/DE708941C/en not_active Expired
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