DE1966798A1 - DEVICE FOR IMPROVED DISPLAY OF IMAGE REPRODUCTION, IN PARTICULAR FOR STEREOSCOPIC DISPLAY - Google Patents

Description

DIPL.-INQ. M. SC. OIPLOPHYS. CH.

HÖGER - LEGAL RIGHT-GRIESSBACH - HAECKER PATENT LAWYERS IN STUTTGART

A 40 371 m

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Sept. 19, 1973

Alfred John Gale 10 Diana Lane Lexington, Mass., USA

Device for the improved display of an image display, in particular for stereoscopic display

The invention relates to a device for improved | Presentation of image information, especially for stereoscopic Playback with picture tubes, preferably with picture tubes with a plurality on the inner surface of a screen formed luminescence points, a perforated grid plate, the holes of which are congruent and accurate with the luminescence points are aligned and two of the perforated grid plate associated intersecting sets of strip-shaped electrodes, of which each crossing point a hole in the perforated grid plate or a

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Luminescence point is assigned, each luminescence point by means of the intersecting electrodes by means of coordinate control is selectively excitable to luminescence by bombarding charged particles from at least one charged particle source on the side of the perforated grid plate facing away from the luminescence points and the electrodes at least at each intersection of a layer of pest body material are separated and arranged on the surface of the perforated grid plate facing away from the luminescence points, and each crossing parts as by corresponding potentials of the Electrodes for emitting charged particles is designed excitable particle source.

From DT-AS 1 032 309 a picture tube is known in which a gas ion stream from a behind the picture tube pane is arranged Generated cathode and electrodes are provided that control this gas ion flow. To this end is located an insulating material, which is drilled through at the intersection of the electrodes, and a Forms channel through which the ionized particles then reach the luminescence points. In this known picture tube The fact that the luminescence causing the reproduction can have a disadvantageous effect on the reproduction sharpness Particles originate from a common particle source and are merely controlled in their passage to the luminescence points will. This known picture tube also includes the picture tube in DT-AS 1 047 244, which is a further development in this respect of the picture tube of the DT-AS 1032 309, as here still the front surface of the picture tube consists of a multitude of cylindrical lenses forming vitreous.

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Another cold cathode display device can then also can be taken from US Pat. No. 2,926,286, in which a type of matrix is provided which is controlled accordingly via switches and where electrons emanating from a common cold cathode and arriving at an anode grid can be influenced by further control electrode groups. Such a display device works only relatively coarse and should not be able to produce sufficient definition.

The invention is based on the object, preferably in such a picture tube as described above, the representation to improve the information and also to enable stereoscopic vision.

To solve this problem, the invention is based on the device described at the beginning and consists according to the invention in that optical filter elements are provided next to each selected luminescence point on the screen, the filter elements are arranged so that the luminescence points are able to transmit certain color parts of the optical spectrum su .

By using optical filters associated with each luminescent point, a stereoscopic representation is achieved in such a way that certain selected parts of the visible spectrum are transmitted from each such surface element as a result of the impingement of the electron beam on a receiver.

The invention is particularly suitable for use in a picture tube as described in DT-OS 19 57 247.

Further embodiments of the invention are the subject of the sub-

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claims and set out in these.

The following is a detailed description of the structure and mode of operation of exemplary embodiments of the invention with reference to the figures explained in more detail. Show:

Fig. 1 shows an embodiment of a picture tube in a schematic representation for illustration the main dimensions,

FIG. 2 is a section along line 2-2 of FIG

1 shows a partial area of particle sources,

Fig. 3 is a section along line 3-3 of

Fig. 1 to illustrate sub-elements related to the screen,

FIG. 4 is a section along line 4-4 of FIG

Fig. 1 to illustrate the relationships between the emitting particle sources and the luminescent screen,

FIG. 5 shows a detail from FIG. 4 in a substantially enlarged representation,

FIG. 6 shows an embodiment example modified in relation to FIG. 4 in a similar representation,

FIG. 7 shows a further modified version compared to FIG

Exemplary embodiment in a similar representation,

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FIG. 8 shows a further modified version compared to FIG

Exemplary embodiment in a similar representation,

FIG. 9 shows a further modified version compared to FIG

Exemplary embodiment with other emitting particle sources in a similar representation,

FIG. 10 shows a further modified version compared to FIG

Embodiment with other emitting sources in a similar representation,

FIG. 11 shows a detail from FIG. 10 in a significantly enlarged representation,

12 shows part of a circuit for supplying energy to the emitting particle sources according to FIG. 4 or a modified embodiment according to FIGS. 8-10,

FIG. 13 shows a modified embodiment compared to FIG. 10 for the energy supply of the emitting Particle sources according to FIGS. 4, 8-10 in a representation similar to FIG. 11,

14 shows the visible portion of the frequency spectrum

as a function of wavelength to describe the application of the invention to stereoscopic Advertisement,

15 shows an embodiment of an arrangement from

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Display surface elements for stereoscopic reproduction /

FIG. 16 shows a somewhat modified version compared to FIG

Exemplary embodiment in a similar representation,

Referring to Fig. 1, a front flat surface 20 generally represents the plane of a luminescent screen on which an image is displayed. This screen has a height h and a width w. An arrangement of charged particles emitting particle sources is generally provided on a rear surface 21 of the picture tube. The thickness or

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The depth d of the picture tube is significantly less than the width w of the screen on the surface 20, and preferably in an order of magnitude of about a tenth of the width w. The detailed structure is in connection below explained with Fig. 2-4.

According to FIG. 2, an insulating grid structure or a perforated grid plate forms a row arrangement of evacuated channels 23, as can best be seen from FIG. The rhombic cross-section of each of these channels generally corresponds in its dimensions to the appropriate ratio of width to height of the screen on the surface 20 according to FIG. 1. The ratio of these dimensions in normal television picture tubes is approximately 4: 3. Each channel is at one end in alignment with a particular area element of the luminescent screen. In particular, for purposes of color rendering, each channel is in alignment with a particular color patch. For example, according to FIG. 2, a channel 23a can be assigned to the red content of a transmitted image, a channel 23b to the green content and a channel 23c to the blue content. Although the channels are illustrated with a rhombic cross-section similar, they may iron also other convenient cross sections v /, for example, 'circular cross-sections.

Each evacuated channel 23 is at the other end in alignment with a separate electron emitting one Particle source. In this way, the perforated grid plate provides an electrical and mechanical separation of the emitting

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Particle sources at the cathode end and also the screen surface elements at the anode end, as will be explained in more detail in connection with the following figures is.

For the particular / described in connection with Figs. 2-4 In the exemplary embodiment, a separate channel is illustrated in association with each color element. However, since the End of the particle source emitted particles, in the present embodiment electrons to the end of the here as Anode working screen with a relatively low angular dispersion are such separate channels not necessarily required, and each channel can be in alignment with more than one working as a cathode Particle source and the corresponding screen element are located. However, sufficient insulating support material must be used in order to reliably measure the external air pressure on the essentially flat image and cathode surface planes of the Withstand picture tube. About the mode of operation of the picture tube To describe as clearly as possible, an embodiment is used in the following explanations separate channels for each combination of particle source and corresponding screen element considered, with the overall device for use in generating a color image is described.

According to Fig. 2-4 forms at the emitting end area, that is. at the cathode-side end 24 of the picture tube a plurality of Conduct upper electrodes 26 of a suitable thin film cathode structure; a plurality of ladders form lower ones

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Electrodes 27 thereof. According to Figure 2 is an electrode 26a assigned to a channel 23a, an electrode 26b to a channel 23b and an electrode 26c to a channel 23c, this sequence is repeated over the entire row arrangement. If a group of three adjacent electrodes (e.g. 26a, 26b, 26c) and a pair of adjacent electrodes 27 are energized to produce an electron flow, a special triple of emitting particle sources is switched on, with each particle source being one Color corresponds, and only such a special triple is activated.

3 shows the anode-side end region 25 of the picture tube opposite the cathode-side end region at the other end of the insulating perforated grid plate 22. In this anode-side end region, an arrangement of luminescence points 28 in Shown in the form of phosphor surface elements in association with each channel 23. Each phosphor element is as follows described, assigned a specific color. Thus, for example, the phosphor element 28a corresponds to the red content, phosphor element 28b - the green content; and phosphor element 28c - the blue content.

Fig. 4,5 show in detail the entire cathode and

the anode structures. According to these figures, each is a particle source in the form of cathodes 30 on an insulating plate 29. The electrodes 27, which are preferably made of aluminum lower electrodes of each of the rows of electron-emitting cathodes 30. A composite insulating layer or solid-state

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layer, preferably consisting of silicon dioxide, is over the electrodes 27 formed. In the region 32 of each cathode, the thickness of the insulating solid-state layer is less than that in intermediate regions 33. In a preferred embodiment, the thickness of the solid layer 31 is in the range 32 between 0.03 and 0.3 microns and preferably may 0.1 microns. In the intermediate regions 33, the thickness of the insulating solid-body layer can, for example on the order of 1 micron or greater.

The electrodes 26 running in vertical columns are formed over the silicon dioxide layer and exist, for example of gold in relatively thick layers, on the order of 0.1 microns or more the area 33 where the insulating solid-state layer 31 is thickest. The electrodes 26 are relatively thin, where they are formed on the adjacent areas 32 of the solid layer 31. In such areas the electrodes 26 a few hundredths of a micron thick, preferably 0.03 micron.

At the opposite end of the insulating perforated grid plate 22, the luminescence points 28 are provided, which through a conductive film 34 are connected to each other, both the luminescent points formed by phosphor elements and the interconnecting conductive film are also adhered to a transparent plate 35. A row arrangement of multiple dielectric filters 36, their purpose

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is explained below, can, if desired, between the plate 35 and the layer of phosphor elements and conductive films 34 as shown in FIG.

If there is a positive potential difference from the concerned Electrode 26 is present to a corresponding respective electrode, the particular cathode emits electrons into one corresponding vacuum channel 23, the amount of required Potential difference for this purpose depends on the dimensions of the cathode. For a silicon dioxide layer of about This potential difference is typically 0.1 micron On the order of 200 volts. In the quiescent or non-emissive state, the electrodes 26, 27 are approximately the same Potentials kept relatively close to ground potential. In synchronism with the transmitted image information, each electrode 27 becomes (or pair of electrodes in the case of a color display) consecutively to a negative potential equal to the limit for the electrode emission between this electrode and the in Rested electrode 26 switched. Depending on the brightness content or the luminescence of the image The transmitted image information becomes positive potentials in succession and synchronously with the transmitted image Electrodes 26 are fed so that each cathode emits electrons in short pulses, the number of electrons through determines the luminescence information of the transferred picture element will. In the case of color rendering, the electrodes 26 are arranged in tripods, with each member of the tripod being one Absorbs voltage potential caused by the luminescence (or brightness) and the hue (or the color information) in the

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transmitted signal is determined. In an exemplary operation, the switching signals fed to the electrodes 27 can be in the range from -50 to -500 volts; the modulation signals to the electrode 26 can be in the range of 0-100 volts. The electrodes emitted in this way by each cathode during each operating process are accelerated with a relatively small angular dispersion towards the anode-side end region or the anode plane 25, which for such purposes can be kept at a voltage potential of the order of magnitude of 5000 volts and above. The electrodes accelerated by each cathode 30 strike the corresponding oppositely arranged punctiform phosphor element of the luminescence point 28 and excite this to luminescence. For monochromatic reproduction, a substantially white, non-emissive phosphor element is chosen for each area point; alternatively, the point configuration for monochromatic operation can preferably and more economically be replaced by a continuous thin layer of phosphor material, in which case each evacuated channel is assigned to a selected surface element and is in alignment with it.

In the case of color reproduction, the material of each of the phosphor elements of the luminescent dots 28 is chosen so that the corresponding pigment colors are reproduced. Optionally, the phosphor can be chosen for color reproduction so that essentially white light is emitted, either as a continuous thin layer of phosphor material or as a point configuration, whereby the white light passes through when luminescing

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appropriate multilayer dielectric or other filters is filtered as optionally illustrated for this purpose is. The filters are designed to capture the desired color parts (i.e. red, green, blue) of the visible To transmit the spectrum through the transparent plate 35.

FIG. 6 shows a structure similar to FIG. 4, but with the insulating perforated grid plate 22 being provided by two insulating grid structures 37, 38 is replaced, between which a plurality of vertical electrodes provided with openings or a grid electrode layer 39 are arranged with passages 40. The overall structure illustrated in FIG. 6 thus has a Triode configuration, which enables different operating modes. For example, in one mode of operation, the Electrodes 26 are all connected to one another and are preferably at ground potential, while electrodes 27 (or corresponding pairs of electrodes in the above-mentioned color rendering) successively in the manner described above in

4th
Be connected in connection with FIG. Manner described to a voltage which, here- a sufficiently high potential difference between the electrodes 26, 27 results in a maximum electron emission, together with an appropriate flow of electrons to enable the like of. Thus, the applied potential difference is greater than that shown in FIG. 4, a potential difference being used with respect to the threshold electron emission.

A modulation bias is then applied successively to the grid electrode layer 39 in appropriate synchronization applied with the transmitted image information, wherein

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an appropriate fraction of that emitted by cathodes 30 Electrons (or possibly all electrons) are able to run through the passage 40 and in this way against the anode plane 25 can be accelerated. An advantage of using such a triode configuration over the Diode configuration according to FIG. 4 is that the capacitance of the individual grid electrode layer 39 forms Electrodes with respect to other parts of the system is significantly smaller than that of the electrodes 26 according to FIG. 4. As a result, the grid electrode layer system can use significantly less energy and is therefore more economical can be operated as the system using only the thin film cathode 30 shown in the previous figure.

Fig. 7 shows a structure similar to that of Fig. 4,6 » wherein the insulating perforated grid plate is formed in three sections 41, 42, 43. Multiple horizontal electrodes or grid electrode layers 44 with passages 45 are attached between. Sections 41, 42, the grid electrodes arranged in rows in a horizontal configuration. Several vertically oriented further electrodes or grid electrode layers 46 with openings are arranged between sections 42, 43 and correspond essentially to the grid electrode layer 39 according to FIG. Some optional modes of operation of the device according to FIG. 7 are possible. In such a mode of operation, all electrodes are 26 of the cathode 30 are connected to a common voltage so that all cathodes continuously emit electrons. The layer areas referred to below as grid 44 are normally kept at tension, which prevents the flow of electrons through the openings,

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and are sequentially switched in synchronism with the transmitted image information to enable an essential Fraction of the electrons from each cathode is accelerated through the passages 45. The "grids" 46 are sequentially biased in synchronism with this transmitted image signal information to modulate the amount of electrons, which is eventually accelerated to the anode end and hits the phosphor elements 28. An advantage of the The arrangement according to FIG. 7 is that the capacitance associated with the individual electrodes or grids 44 is essential is less than the capacitance adhering to the individual electrodes 27.

Now that we have various particular embodiments of the invention using the cathode structure of FIG Fig. 5 were described, be it in diode configuration, triode configuration or tetrode configuration according to the Figures 4, 6 and 7, respectively, now in conjunction with Figures 8-11, will illustrate similar structures using different cathode embodiments explained.

Fig. 8 shows an optional embodiment with solid-state cathodes 48. The arrangement of the cathodes used comprises λ a group of vertical electrodes 49, adjacent to the insulating plate 29 together with a group of horizontal electrodes, the electrodes 49, 50 are usually made of metal, in particular gold, silver or aluminum . Between the electrodes 49, 50 in the area of each cathode 48, a film made of a semiconductor compound 51 is attached, which can be composed of tin oxide, for example. Projections 52 on part of the electrode ^ 9 rise to the surface of the semiconductor film 51. Electrons are emitted from the metal / semiconductor compounds when a voltage difference from the electrode 50 to the electrode 49 passes through the

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Semiconductor film is transferred. In operation, the electrodes 50 are sequentially transmitted in synchronism with the transmitted Image signal information is connected to a voltage based on the idle state of the electrode 49, which is the limit voltage corresponds to the electron emission, usually lies this voltage is of the order of 200 volts. Additional modulation voltage potentials become consecutive are connected to the vertical electrodes 49 to control the number of electrons emitted from each cathode according to FIGS Point-to-point brightness and color values of the transmitted image content are emitted. The remaining details of the imaging at the anode plane are essentially similar to those of, for example, FIG. 4, so that these details are not repeated here.

As with the thin film cathodes shown in FIGS. 4-7, a Triode configuration similar to that of FIG. 6 and a multi-electrode configuration similar to that of FIG. as further optional embodiments versus the diode configuration 8 can be used. Accordingly, such structures are not discussed in detail.

Fig. 9 shows an alternative embodiment using different electron emission sources. A reflective film 53 as an electrode made of silver or other metal that has a maximum reflectivity Is selected in the red and infrared part of the optical spectrum, is deposited on the insulating plate 29. One Layer 54 of transparent insulating material, usually aluminum oxide or some other high temperature resistant material Isolation material chosen for maximum transparency in the red and infrared part of the optical spectrum

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is deposited over the reflective film 53. The layer 54 is on the order of a few microns thick, expediently about 2 microns. Several thin film heating elements in the form of heating strips 55, expediently made of carbon, tungsten or other highly temperature-resistant conductive material, are deposited on the insulating layer 54; interconnections between the heating strips are also deposited on the layer 54 so that the heating strips are serially connected in series. 5.6 another insulating layer made of high-temperature-resistant materials, examples M game as alumina, is deposited over the heating strip 55 and their connections as well as parts of the layer 54th Electron emissive cathodes 57, typically made of lanthanum hexaboride or other low work function material, are deposited on the high temperature insulating layer 56. The cathodes 57 are connected to one another in columns or, optionally, in rows, depending on the electrical functions that are assigned to a passage on the iron grid 58 in accordance with the explanations above. In order to prevent chemical reactions between the cathodes 57 and the insulating layer 56 and to achieve maximum radiation absorption by the heating strips 55, thin layers of carbon (not illustrated) can be deposited on the insulating layer 56 before the electrodes57 are deposited.

The grid 58 is between two insulating grid structures 59, 60 mounted in a manner similar to that described in connection with FIG. 6, with the grille 58 in the manner shown Has passages 61.

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In one mode of operation of the embodiment according to FIG. 9, the grid or the grid electrode layer 58 is on a held constant potential / and the cathodes 57 are column-wise connected with each other. The rows of heating strips are successively synchronized with the image signal information switched. The thermal inertia of such heating strips / cathode structures is so low that it is sufficient fast switching times can be obtained, especially when applying a bias voltage to the rows of heating strips, wherein all cathodes 57 are used to a temperature just below the limit for substantial electron emission at rest will. Modulation voltage potentials are corresponding and synchronous with the image information to be transmitted successively fed to the columns of the cathodes 57, so that the sizes of the electron currents through the passages of the grid electrode layer 58 by the dot-dot luminance (and Color value) content of the image can be controlled. The further details of the creation of the image are in essentially similar to those of the exemplary embodiments described above.

In another mode of operation of the particular embodiment shown in FIG. 9, the cathodes 57 are connected in series, and the Grid electrode layer 58 is arranged in columns substantially similar to grid electrode layer 39 of FIG. With such an arrangement, rapid switching of the rows of heating strips is not required. Retired the rows of kafchodes are on a positive potential opposite of the grid electrode layer 58, and an electron flow through the passage 61 is prevented. the Rows of .Kathoden are successively synchronized with the transmitted image information up to a limit voltage for

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an electron flow through the passages 61 of the grid electrode layer 58 switched. Modulation potentials are sequentially arranged in grid columns according to the brightness (and Color value) content of the image is created.

10 and 11, which show an optional embodiment of the invention with a differently designed To illustrate the electron-emitting cathode, a film 62 of alumina is deposited on an insulating plate 29. A plurality of electrodes 63, suitably made of molybdenum, are in a number of rows on the aluminum oxide film 62 dejected. In a preferred embodiment, the thickness of electrodes 63 can be on the order of 0.2 microns.

over the row of electrodes 63 is another layer

64 of alumina, approximately 1 micron thick in a preferred embodiment. One Group of electrodes 65, which are arranged in columns, these electrodes consist of molybdenum, are then deposited on layer 64. You electrodes 65 at that preferred embodiments are on the order of 0.2 microns thick. There is 68 on each cathode a passage or hole 67 which, in a preferred embodiment, may be circular and have a diameter in of the order of 2 microns into the electrodes

65 as well as the film 64 etched to a suitable passage

in the electrodes 65 and a part of the aluminum oxide film to be removed in the area immediately below this passage. A field emission projection designed as a cone 66 made of molybdenum is placed on the electrodes 63

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deposited within the etched hole in the manner shown. A voltage in the range of 50-500 volts between the electrode 65 and the electrode 63, the Electrode 65 is positive with respect to electrode 63, generates a current of electrons from the field emission protrusion 66. The electrons move through opening 67 and continue to the phosphor anode screen on the other The end of the channels 23 accelerated. In operation, the horizontal electrodes 63 become sequentially synchronous with the transferred image information to a limit voltage for the electron emission of the cone-shaped, point-like Field emission projections 66 switched off. Additional modulation voltages are used in succession Electrodes 65 switched synchronously and in accordance with the brightness (and color value) content of the transmitted image information.

In an optional arrangement according to the exemplary embodiment according to FIG. 10, an additional arrangement provided with openings Electrode similar to the electrodes provided with openings according to FIGS. 6, 9 between field emission cathodes 68 and an anode phosphor screen may be disposed in the vicinity of the cathodes 68. One of those with entrances The provided electrode can be maintained at a positive voltage in the range of about 50 to about 500 volts. A primary purpose of such an electrode is to isolate the somewhat critical field emission cathodes Changes in the anode potential as well as in preventing possible charge accumulation on the adjacent insulator.

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After previously in connection with Pig. 4-11 different Exemplary embodiments of cathode structures have been explained, will now be used with reference to FIGS. 12, 13, a part of the used Switching device shown to be the one previously described Operate structures. The circuit of FIG. 12 includes, for example, the Pig cathode structure. 4th

Here are the vertical electrodes as well as the horizontal ones Electrodes 27 and thin film cathodes 30 formed therefrom are illustrated. Each horizontal frode is used for line feed 27 connected to one of several semiconductor switches, for example semiconductor switches 69a, 69b, 69c, and each triple this semiconductor switch is located at a single connection point. For example, switches 69a, 69b, 69c are respectively

f ^ on switches n low triples are

with connections 70b, 70c usv /. tied together. The connections 70a, 70b, 70c etc. are successively in synchronism with the transferred image exceeds λ information about additional (non-shown) semiconductor switch connected to a voltage representing the threshold voltage for electron emission from the thin film cathode 30th With changing frames, either all of the switches 69b or all of the switches 69c are kept open, an emission from the connected cathodes 30 being prevented and an interlacing of changing frames being established.

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One conductor of each triplet of adjacent vertical electrodes is connected in the manner shown to a triple of transistors 71a, 71b, 71c, which are known, for example

- metal oxide field effect transistors ^ can be,

although other switching or modulation semiconductor devices can be used in various ways. All the gates of the transistors 71a are connected to one another at a terminal 72a. Similarly, all of the gates of transistors 71b are connected to one terminal 72b; all the gates of the transistors 71c are connected to a terminal 72c. Color signals are fed to the terminals 72a, 72b, 72c. The emitters of the transistors 71a, 71b, 71c are connected as shown to the collectors of another group of transistors 73a »73b, 73c which are arranged in groups of three. The emitters of all the transistors 73 are connected together via a connection 74 to: a common voltage which is positive with respect to that which is connected to the connections 70a, 70b, 70c etc. in terms of circuitry. The gates of transistors 73a, 73b, 73c are connected in triples with terminals 75a, _75b: 75c connected. The transistors 73 are normally non-conductive. A signal proportional to the luminance content of the transmitted image is successively applied to terminals 75a, 75b, 75c, etc. in synchronization with the transmitted image information, making each group of transistors 73a, 73b, 73c, etc. to conduct in rotation. This current flow is divided by the transistors 72a, 72b, 72c, etc. in accordance with the color signal applied to the gates of these transistors.

The arrangement of FIG. 12, although complicated in terms of the circuit arrangement etv / as, is used to the total number of required cathode structures in the series arrangement of the emissive used according to the invention Structures diminish while at the same time full

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transferred image definition is maintained. As compared to the known prior art with regard to results in the elements used according to the invention, such an arrangement seems to be the most economical overall to provide.

A simpler arrangement of the circuit arrangement results from Pig. 13. This arrangement requires slightly more cathode structures than that of Pig. 12. In the modulation sequence switching arrangement according to FIG. 13, each triple of transistors 73a, 73b, 73c according to Pig. 12 is replaced by a single transistor 76a, 76b, 76c, etc., the collectors of which are connected to the transistors 71a, 71b, 71c. The emitters of the transistors 76 are connected to one another and to a terminal 74, while the gates of the transistors 76a, 76b, 76c etc. are connected to the modulation terminals 75a, 75b, 75c etc. A closer look at Pig. 12, 13 shows that about $ 50 more tertiary conductors 26 for the Pig switchgear. 13 than for that according to Pig. 12 are required. ·

In Pig. 13 is an optional arrangement for line sequencing

27 circuit opposite the horizontal electrodes- shown. Each electrode is provided with a special Schalttransis: connected or 79, and by this only one of the terminals 70a, 70b, 70c, etc. "Bas amount of overlap between adjacent rows of consecutive frames is in this case to the effort of about an additional 50 fo more electrodes 27th Thus, according to Pig. 13, about 125 ° more cathode structures 30 are required than for the arrangement according to Pig. The line switching arrangement according to Pig. 12 can optionally be used with the modular pole switching arrangement according to Pig. 13 and vice versa . Perner can use the optional overall pole switching arrangements in the shown and previously

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purged. Shape with regard to both figures also with each of the different cathode structures are used, as they are in Pig. 8-10 are illustrated.

As mentioned above, in particular embodiments according to the invention, dielectric filters can often be used or filters of other types are used, as explained above as optionally expedient and in the anode parts of the Display devices according to FIGS. 4, 6-10 are shown. Such Exemplary embodiments are particularly applicable to stereoscopic reproduction. The basics of such stereoscopic Display devices are explained in connection with FIG. Although such display devices in connection with special embodiments according to the invention have been explained above, the basics of these devices can also be used for other forms of television display equipment including common cathode ray tubes.

According to FIG. H, the visible spectrum 80 is divided into six regions ^R R ' ^R B ^{f G} R' ^G B * ⁵ R * ^B B ^un " ^fcer " ^fceil '^t; · Each filter of the filter arrangement 36 can either transmit one of these six areas of the spectrum, or the entire red, green and blue part (R _R + Rg)., (R _R + G _ß ), (B _R + Bg) of the Spectrum in a manner to be described in connection with FIG. 15 by way of example. 15 is a schematic representation of the display screen of a display device according to the invention or of another conventional cathode ray tube, the transmission band of the filter which is assigned to each surface element of the screen being indicated by corresponding reference designations. The reference designation R indicates that the filter _{transmits the entire red component (R R} + R _ß ); G indicates a transmission of the full green portion (G "+ Gn); B indicates the transmission of the full blue portion (B _R + Bg). According to Fig. 12, in the line sequence

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Sept. 19, 1973

Switching arrangement scanned the lines in pairs. According to Pig. a pair of lines specified as lines "L1" scans the filters R_, Gr-of Bg as well as the group of filters immediately above those beginning with E,. B, G are designated. A pair of lines "L2" scans the filters R _R , G _R , B ^ and the filters R, B, G immediately above. Similarly, a frame line pair "AL1" scans the filters Rg, G _B , Bg and the filters R, B, G immediately below, while the alternating frame line pair "AL2" scans the filters R _R , G _R , B ^ and the filters R , B, G scans immediately below. If line pairs denoted by odd 7ths (ie L1, L3 etc. and ALI, AL3 etc.) j from a first camera and. If the line pairs denoted by even numbers (ie L2, L4 etc. and AL2, AL4 etc.) are removed from an adjacent camera which is focused on the same scene, stereoscopic information is conveyed to the viewer of the display device. The stereoscopic scene is _{viewed through the filters R ß} , Gn, B ^ for one eye and the filters R _R , G _R , B _R for the other eye. Preferably, a neutral filter of approximately 50 i <> light attenuation is assigned to each of the filters R, G, B on the display tube, so that the light flux transmitted thereby is approximately equal to that through the filters R ^, G ^, B ^, R "> G ", Bt% is. Such an arrangement makes the stereoscopic λ light flux nominating when the display is observed through appropriate filters and the light flux uniform when the display is directly observed. In this way, the stereoscopic system is compatible with the existing monochromatic systems and color systems.

The arrangement according to FIG. 15 in connection with the switching arrangement as shown in Fig. 12, reduces the number of required elements in the display tube. Optional arrangements that more

409816/0982

A 4O 371 irr a - 149 Sept. 19, 1973

Requiring picture tube elements can “also be provided. An example of this can be found in Pig. 16, where line pairs L1, L2 etc. and alternating frame line pairs AL1, AL2 etc. only _{scan filters R R} , G _R , Bg. for the odd numbers (ie L1, L3 etc. and AL1, AL3 etc.) and only R ,,, GL ·, Bj, for the even numbers (ie 12, L4 etc /. And AL2, AL4 etc). The circuit of FIG. 13 can be used in conjunction with the arrangement of FIG. Other optional arrangements can be made, for example dividing the optical spectrum into more than six regions. Such an arrangement may, for example, comprise nine arbitrarily divided areas, each color being divided into three areas, the outer parts of which are scanned for reproduction to one eye while the central part is scanned for reproduction to the other eye.

40981 6/0982

Claims (7)

PATENT LAWYERS DR.-ING. HOGER DIPL-ING. ADJUSTMENT RIGHTS ...? -. DIPL-PHYS.DR.GRIESSBACH DIPL-PHYS.HA = CKER A 40 371 m «7 JSt. 1973 η 1966798 Claims [lJ device for the improved display of image information, especially for stereoscopic reproduction . In picture tubes, preferably in picture tubes with a plurality of formed on the inner surface of a screen Luminescence points, a perforated grid plate whose holes are congruent with the luminescence points and are precisely aligned and two of the perforated grid plate associated intersecting groups of strip-shaped Electrodes, each intersection of which has a hole is assigned to the perforated grid plate or a luminescence point, each luminescence point by means of the crossing electrodes through coordinate control - Selective to luminescence by bombardment with partial charge is excitable by at least one charged particle source on the side exposed to the luminescent markers the perforated grid plate go out and wherein the electrodes at least at each intersection of a layer a solid material are separated and arranged on the face of the perforated grid plate facing away from the luminescence points and each intersection as through appropriate potentials of the electrodes for the emission of charged particles excitable particle source is formed, characterized in that optical filter elements are provided next to each selected luminescent point (28) on the screen are, the filter elements are so arranged. 409816/0982 A 40 371m a - 149 I qpRT-Qft Sept. 19, 1973 p I Λ OO / 3 ö that the luminescence points certain parts of the optical Able to transmit spectrum. 2. Apparatus according to claim 1, characterized in that the luminescence points (28) are flat and transfer the selected color parts in succession to produce an image. 3. Apparatus according to claim 1 or 2, characterized in that alternating lines of the luminescent points (R, B, G in Fig. 15) are set up to transmit the complete red, green and blue parts of the optical spectrum in succession over the width of the screen and that intervening lines (B _ß , G _ß , R _ß ) are used to transmit selected areas of the complete red, green and blue parts of the optical spectrum. 4. Apparatus according to claim 3, characterized by a plurality of neutral filters in addition to all those filters that are used for Transmission of the full red, green and blue Parts of the optical spectrum are provided, with the neutral density filter for attenuating about 50% of the transmitted optical signal are formed. 5. Device according to one of claims 1-4, characterized in that that alternating lines of luminescent dots the complete range selected for the transfer of the first red, green and blue components of the optical spectrum are established and that intermediate lines for Transmission of second selected areas of the complete 4098 1 6/0982 A 40 371 m
a - 149 red, green and blue portions of the optical spectrum are established. 6. Device according to one of claims 1-5, wherein controls are provided for the sequential control of the electron emission, characterized by line and column controls for sequential operation with switch elements (69a, b, c) operating with a row voltage are connected to switch the line voltage to adjacent pairs of the first conductors (27) of the emitting sources in controlled sequence during a first plurality of frames as well as associated adjacent ones To feed pairs of the first conductors during a second plurality of alternating frames with modulation controls for sequential actuation a plurality of first switch elements (73), each in connection with a second conductor (26) of the emitting Sources, second switch elements (71) in connection with the first switch elements for controlling the operation of the first switch elements in response to a light signal, the light signal being successive Groups of three switches of the first switch elements ^ (73) is switched on, and components (connections 75) for supplying color signals to the first switch elements synchronously with the successively supplied ones Light signals, the operation of these line sequence controls as well as the modulation controls the Luminescence of the luminescent points. (28) of the screen to generate a color image. 7. Apparatus according to claim 6,. Characterized in that each the switch elements (69,71,73) comprises semiconductor switch elements. 409816/0982 Blank page