CA1213386A - Information display system - Google Patents

Information display system

Info

Publication number
CA1213386A
CA1213386A CA000424162A CA424162A CA1213386A CA 1213386 A CA1213386 A CA 1213386A CA 000424162 A CA000424162 A CA 000424162A CA 424162 A CA424162 A CA 424162A CA 1213386 A CA1213386 A CA 1213386A
Authority
CA
Canada
Prior art keywords
display
memory
bus
information
analogue
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
CA000424162A
Other languages
French (fr)
Inventor
Craig A. Schreiber
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.)
KREON SCREEN INTERNATIONAL BV
Original Assignee
KREON SCREEN INTERNATIONAL BV
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 KREON SCREEN INTERNATIONAL BV filed Critical KREON SCREEN INTERNATIONAL BV
Application granted granted Critical
Publication of CA1213386A publication Critical patent/CA1213386A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/72Modifying the appearance of television pictures by optical filters or diffusing screens
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00Methods or arrangements for processing data by operating upon the order or content of the data handled
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00Colour television systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers

Abstract

ABSTRACT

An information display system characterized in that it comprises a computer device having at least one input member for re-ceiving video information and a processor member connected with said input member for processing and/or controlling digital video infor-mation contained in and/or obtained from the video information received from the input member and/or digital video information generated by the computer device itself in order to produce display data and con-trol-signals, a communication channel having a data bus and a control bus connected to the processor member of the computer device for the transmission or the display data and the control-signals respectively, a memory device connected to the data bus for storing the display data received from the data bus, a memory control-device connected to the control bus for controlling the storage of display data in and reading the stored display data from the memory device in response to control-signals received from the control bus, a digital/analogue converting device connected to the memory device for producing analogue display signals during reading the memory device and at least one display panel consisting of a plurality of electronic display units arranged side by side in a manner such that the respective display surfaces together constitute the display surface of the display panel.

Description

1213~386 Information display ~ystem.

The invention relates to an information deisplay system.
~he invention lntends to provide a system which i8 particu-larly suitable ~or displaying vldeo information on large screen-R.
For thls purpose the invention provides a system of the kind set forth in the preamble which is characterized in that lt comprises a computer device having at least one input member for receiving vldeo lnrormation and a proces~or member connected to the inpu~ member for pro¢es~ing and~or controlling digltal video information contained in and~or obtained from the video information received from the input member and~or digital video information produced by the computer device itself in order to produce display data and control-signal~, a communi-cation channel having a data bus connected to the processor member Or the aomputer device and a control bus for the transmissicn of the dis-play data and the control-signals respectively, a memory device connec-ted to the data bus for storing display data received from the data bus,`
a memory-control device connected to the control-bus for controlling the storage of display data in and reading the stored display data from the
-2-memory device in response tc the control-signals received from the con-trol-bus, a digital-analogue conversion device connected to the memory device for producing analogue di3play signals during reading of the memory device and at least one display panel consisting of a plurality of electronic display units arranged side by side in a manner such that the respective display locations together constitute the display surface Or the display panel.
The display sur~ace of the display panel may vary between, for example, 2 ms2 and 200 ms2 or more, whilst the depth of the dis-play panel remains the same, for example, 50 cms, independently of the si~e. Preferably the display panel is formed by arranging a plura--~ llty o~ display tubes side by ~ide in a rrame The system embodying the present invention might be designated a super-macro-image televlsion.
By means o~ the system embodying the present invention tele-vlsion programme~, video programmes and/or information programmes can be displayed on a large ~creen. Video programmes may be received from a video pbk-up or a video camera.
Thanks to the computer device texts, logo's and amination images can be written on the display surface of the display panel.
The information may be included both separately and simultaneously in the current television or ~ideo programme. Moreover, the information can be directly written by a keyboard on the display surface or directly by means of pre-programmed video ca3settes.
The above summary is not limitative.
Briefly stated~ an image can be displayed on a large ~cale, whilst a plurallty Or images can be combined into one large image to be displayed. The display panel has a very high resolution and a high lumlnance exceeding many timeq that of a normal television image. This means that the display panel can be used also in daylight.
In order to protect the display surface of the display panel it may be provided at the front with a transparent perspex sheet. The system embodying the invention i3 particularly suitable for adverti-sing, video performances, information transmission, film display or 12133~36 combinations Or these possibilities.
Finally it is an a~antage of the system embodying the present invention that displays can be true to time and various efrects can be obtained such as repetitions, slow-down representation3, close~ups and so on.
The invention will now be described in detail with reference to the drawing, in which Fig. 1 shows a highiy simplified block diagram o~ the system embodying the invention~
Fig. 2 is a front view Or the panel of the sy~tem embodying the present invention, `~ Fig. 3 shows a block diagram in further detail of the system embodylng the present invention, which i9 in particular compatibla with the known television system and the display panel i9 composed Or display tube3, Fig. 4 shows a detail Or a display tube of the panel embody-ing the invention , Fig. 5A, B, C illustrate the use of prisms in the display panel in accordance with the invention , Fig. 6 show~ a wedge sh~ped optical member according to the pre~ent invention, Fig. 7 i~ a front view of a part of the paneliwherein the wedge 6haped optical ~embers are attached to the dis~lay units of ~aid panel, and Fig. 8 shows a sectional view of a part of the p~nel, wherein the wedge shaped optical memb2rs are applied to the face plate of the cathode ray tube~ thereof.
Fig. 1 ~qhows a highly simpliried block dlagram of the infor-mation display system in accordance with the invention. Reference numeral 1 designates a computer device having a video input 101 and being connected to a data bus 102, a control-bus 103 and an address bus 104. The computer device may furthermore be conne¢ted to marginal appa-ratus 6, for example, a terminal station and a memory for video infor-mation to be displayed produced by the computer device. The digital video inrormation produced by the computer devic0 may or may not be 13~86 displayed together with the received video information processed or not processed and being of digital, analogous nature or a combination thereof on a display panel. For this purpose the sy~tem embodying the invention comprises at least one display panel 5, a memory device 2, a memory control device 3 and a digital~analogue corversion device 4.
The digital display data of the computer device are tran~mitted through the data bus to the memory device, whereas the address and control-sig-nals of the computer are transmitted by means Or the addre~s bus and the control-bus respectively to the memory control-device 3. The memory control-device generate~ control-dignals on a line 103' to control the memory device 2 and control-signals on a line 103" to control the digital/analogue converter, which receives display data signals through a lin~ 102'. Finally the digital/analogue converter 4 passe~ analogue display signals through a line 107 to the display panel 5.
As stated above, the video information received by the com-puter device may be of a digital or analogue nature or a combination thereof. In thiY regard the video input of the computer may be connec-ted to a member capable of detecting the nature of the incoming video information and/or to an analogue/digital converter for converting in-coming analogue video in~ormation into digital video information. More-over, the computer may have separate inputs for analogue and for digi-tal video information.
The memory control-device 3, the memory device 2 and the digital/analogue conversion device 4 may each be formed by a plurality of the respective members co-operating with different display panels 5.
According to the invention each display panel 5 consists Or a plurallty of electronic display units 52 (Fig. 2) each having a re-producing surface 53. The electronic display units are arranged side by side in the frame 51 of the display panel in a manner such that the respective display surface 53 together constitute the display surface of the display panel, the latter surface being marked by a dot-and-dash outline designated by reference numeral 56.
The display surface of the display panel may be flat or curved, for example, corresponding with the curvatures of the display tubes employed.

Since the display panel 1 is composed of identical unlts, re-placement can be carried out in a simple manner.
With respect to each display panel 5 the memory device 2, the memory control-device 3 and the digital/analogue converter 4 comprise at least one individual member for each electronic display unit of the display panel. When the incoming video information is at least com-patible with the interlaced colour television system, each memory - device and memory control-device may comprise for each electronio di~play member two respective members and the digital/analogue converter may comprise for each colour two respective members, i.e.
in the case of colour slgnals, six digital/analogue converting members.
The system embodying the lnvention may, of course also be designed for the sole reproduction of black-white video information, whilst the sy~tem may ~urthermore be designed for multiple interlacing.
One of the most important faculties of the system embodyin~
the invention i9 that the computer device 1 processes vldeo informa-tion recelved at the input 101 in a manner such that this information, which i3 reproducible with the aid of a single electronic display unit 52 can now be displayed on a display panel 5 o~ considerably larger dimensions by partial images contained in said video infor-mat~on to be displayed on one individual electronic display unit of the display panel in a manner such that by allotting partial images to defined electronic display unit~ the same image is formed, but of much larger dimensions and improved resolutlon. The display panel may even be composed Or 4OO display screens or television display tubes, each of which i~ capable of displaying a partial image 1/400th the original image, electronically magnified to the dimensions o~ the original image size. The system embodying the present invention might, therefore, be termed an image magnifying system. Owing to the dlgital processing the resolutlon is, however, not adversely affec-ted in contrast to the effect Or optical means.
A further possibility of the system embodying the invention resides in using a number of electronic display unitQ of continuous display surfaces ~or reproducing an original image on an enlarged scale and u~ing remaining electronic display members for reproducing additional video information generated by the computer itself and/or introduced with the aid of a terminal station and a memory.
It will be obvious that the system embodying the invention encompasses numerous possibilities of use in many domains.
Fig. 3 shows the block diagram of Fig. 1 more in detail for the case in whlch the received video information consi~ts of analogue colour sigrals and a synchronizing signal and in which furthermore the interlacing ~ystem is employed.
Referring to Fig. 3 the computer device comprises a proces-sor member 10, a multiplexer 11, an analogue~digital converting member 12, a data coupling member 13, a clock generator 14, control-members 15 and 16 and an amplifier 17. The computer device is furthermore connected to margina~ apparatus such as a terminal station 61 and a memory 62.
Of the memory and the memory control-device i~ 3hown only that part which co-operates with one electronic display unit, in par-ticular, comprising a colour display tube 57 and a television board 50. In view oP the interlaclng system the memory, the memory control and the dieital~analogue converter are doubled for each eleotronic display unit. For the sake of ease only one part indicated by a dot-and ~ash outline designated by reference symbol I will be described hereinaPter.
~eferring to Fig. 3 there are provided a memory member, a memory control-member and three digital/analogue converting members for each raster of a half image to be displayed on the display tube of each electronic display unit. The memory member, the memory control-member and the digital/analogue converting member may, how-ever, be design&d 90 that in common for the rasters of an image to be displayed on the di3play tube of each electronic display unit there are provided only one memory member, one memory control-member and three analogue/digital converting members, the memory member having double the capacity o f the memory members of Fig. 3 in case of dupli-cate interlacing. The respective memory control-member~ control the memory members in a manner such that when one half o~ a memory member is read and displayed synchronously herewith on the respective display tube, the other half o~ the memory is written or supplemented. In case of the double structure of Fig. 3 the electronic implementation is simpler than in the other case mentioned above as a result of the less complex control-requirements.
. .

1338Çi In case of said double structure it is preferred for each electronic display unit to comprise a display tube or a difrerent screen member and three insertable printed circuits, one print having the required electronic means for generating at least one electron beam in the case of a display tube, for sucking off the electron beam(s) and for controlling the irstantaneous inten~ity thereof and a second print and, preferably, a third print identical to the second print having each a memory member, a memory control-member and a number of dieital/analogue converting members equal to the number Or electro-nic beams. The display panel is composed in this case of identical units.
The interlacing part 1 is connected by means of a communi-cation channel îO to the computer device. The communication channel 100 comprises the above-mentioned data bin 102, the control-bus 103 and the addres~-bus 104 and apart therefrom a clock-bus 105 and a synchronisation-bus 106.
The communication channel may comprise cables, infrared or fibre-optical ways.
The clock generator 14 pr oduces a clock signal and applies the same to the multiplexer 11, the analogue~digltal convertlng member 12, the pro4essor member 10, the data coupllng memb~r 13 and by means of the ampl~fier 17 to the clock-bus.
The clock generator 14 produces sampling pulses of a fre-quency as high aq i~ required for display with a large bandwidth input.
The incoming video information includes the colour vldeo slgnals red, green and blue, which are applied to the multiplexer 11 and a synchronizing signal applied to the processor member 10, the data coupling member 13 and the synchronizing bus 106. The colour video signals multiplexed by the multiplexer 11 are digitalized in the analogue/digital converter 12 and then applied to the data coupling member and subsequently to the processor member in order to process the data concerned in accordance with a programme or instructions furnished by the terminal station 61 and/or the memory 62. This pro-cessing can be concerned with a procesqing of the incoming video 35 information, but also with the combination thereof with internally gene-rated video information. By means of control-member~ 16 the data coup--` lZ13386 ling member 13 provides display data to the data bu~ 102. It is not necessary to provide invariably one driving member ~or each electroniC
display unit. In a specific oase, for example, one driving member may be used for three electronic display unitq. The same applies to the 5 driving members 15, which pass the address and control signals of the processor member to the control-bus. Finally the processor member applies furthermore a control-signal to the data coupling member.
Each memory control-member 31 i9 connected to the address bus 104, the control-bus 103, the clock-bus 105 and the synchronisation lO bus 106. Each memory member 21 is connected to the data bus and re-ceives through the line 104' address signals and throueh the line 103' control-signals from the memory control-member 31 concerned. The digi-tal/analogue converting members 41, 42 and 43 for red, green and blue respectively receive through the line 103" a fly-back suppression signal from the memory control-member 31 and through the lines 102R, 102G and 102'B respectively the respective display data and in turn they apply through the lines 107R, 107G and 107B analogus display signals to the television board 50, which board is also connected to the synchronization bus, which means that all display screens 57 are 20 synchronously scanned or written.
A memory control-member 31 is selected by an address and each memory member 21 receive~ instructions by means of the data and corltrol-bus. The further data address signals are video information.
The data are stored in the memory in accordance with the address.
Reading of the memory members issynchroniæed by the synchro-nizing signal contained in the incoming video information.
The control is furthermore such that reading synchronous with the soan of the first interlacing part I supplements the second interlacing part II.
Visual improvement is obtained by writing the second inter-lacing on the edges of the image dots of the first interlacing.
The system embodying the invention comprises at least one display device having a large screen controlled by a computer device.
The ob~ect oP the system according to the pre~ent invention is to di play video information and information processed and controlled by a computer device on large surfaces. In ~ynchronism with the image display sound may, of course, be reproduced.

g Recurring to the display panel 5 as shown by way of example in Fig. 2 it is as umed that the electronic display members comprise cathode-ray tubes or display tubes 42. The following part of thi~
description is in particular concerned with the perfection of the visual impression9 that is to ~y, the impression that the di~play panel 5 runctions as a single screen, whilst the display surface is formed by the re~pective discrete surfaceq 53 of the display tubes 52. This involves that a solution has to be found for the disconti-nultles 54 and 55 resulting from the side-by-slde arrangement OI the display tubes 52. These discontinuitles can be minimized by disposing the dlsplay tubes 52 as near one another as pos ible. For 'chat matter, the discontinuities in smaller panels will be more disturbingthan in large panel~, since the viewlng distance from the panel is larger in the latter ca~e. A further problem of` the display panel in the system embodying the invention may reside ln that, as i known, the front faces of the display tubes are curved. This problem is parti-cularly involved when the display tube~ are mounted, 90 to say, in a flat plane.
A solution for the two above-mentioned problem3 is found in the use of flat, transparent Fresnel lense~ preferably havlng having more than 60 grooves/cm.
In front of the front side of each display tube 52 is dis-posed a Fresnel lens in a manner such that the imaBe displayed by the respective display tube i9 magnified to an extent such that the respective images of partial images ~oin one another and are trans-formed in a flat plane determined by the Fresnel lenses. In practice it has been found that this solution is particularly suitable for small display panels.
A solution for the problem of obtaining co-planar images displayed by the various display tubes 52 is particularly related to the dlsplay tubes themselves.
Fig. 4 shows a detail of a display tube to be used in the panel in accordance wlth the invention. With the exception of the front side of the display tube it is a conventional one. The centre line of the display tube is designated by M and the screen is designa-1~13386 ted by reference numeral 61. The screen 61 is a curved surface having phosphor trios in the case of colour display tubes. The front side of the display tube designated by reference numeral 62 is flat and ad-joins the curved outer face o~ the screen 61. In the front plate are 5 included optical fibres i.e. at least one fibre per colour phosphor trio in a manner such that at the centre the fibre or ~ibres is (are) at ri~ht angles to both the screen 61 and the front face 62, whereas to-wards the outside the fibres spread in fan-like fashion aq is clearly shown in Fig. 4. The fibres themqelves are designated by reference 10 numeral 64. Briefly stated, the fibres 64 transform the curved surface Or the screen 61 into a flat ~urface 62. Owing to the flat structure of -- the front plates of the display tubes they can be arranged more closely to one another, whilst the remalning interstice, at lea~t at the level of the front plate, can be fllled out with an elastic filler, for 15 exan~ple, sillcone cement. The advantage of u~ing at least partly transparent silicone ceDlent is that the silicone cement will absorb to some extent the radiation of the front plates between which it is sand-wiched 90 that the aforesaid discontinuities are at least less con-spicuous and under favourable conditions they will not attract the atten 20 tion.
A further solution of the problem involved in the disconti-nultles 15 found in the use of prisms specifically d99 igned for this purpose as shown in Flgq. 5A, B, C.
Referring to Figs. 5A, C reference numeral 70 designates the 25 3creen of a conventional display tube havirg a curved front plate 71.
In the side-b~r-side arrangement of the display tubes 70 gaps 72 are ~ormed, which e~ive rise to the aroresaid discontinuitieY. At the peri-phery of therront plate 71 of the display tube 70 are placed prisms 73, 73' so that the prisms arranged on neighbouring display tube3 co-operate 30 with one another as i~ indicated in Figs. 5A, C.
Fig. 5B shows an optlcally transparent bar 74 or light gulde, whioh has reflective layers on the long sides, for example a metal foil 75. The bars are disposed in re-entrant positions one on the other. The effect of the prisms is based on the principle o~ light 35 conduction by reflection at the wall~. The bars 74 are thus arranged at 12~33~6 , 1 an angle to the front plate 71 of the disp~ay tube 70. In other words, the e~fect of the.prisms is based on total refleotion in a parallel transparent body. In fact filling out the discontinuitie~ in the diqp7ay iq not based bn information transmi~qion but on the tranq-misqion of colour and luminance or elqe the colour and light/dark e~fect on the screen, The continuity is thu~ essentially obtained as a confuqed image. Furthermore, the cross-sectional areas o~ the barq 74 may be related to the size of the image dot.
Fig. 5C illu~trates the u~e of conical light conductors 74' in the p ~m~ 73'. The light conductorq are arranged in contact with one another and adjoin the front plate o~ the display tube and are in _ line with one another on the other side of the prism in a manner such that they are directed in poqitionq (arrow B) opposite to the curva-ture (arrow A) of the ~ront plate of the diqplay tube.
Still another solution for the two above-mentioned problems, which in fact i9 analogous to the solution of the figure 4 embodiment, but then applied to the exterior of the face plate of a conventional cathode ray tube, i~ found in the application of wedge shaped optical members as the oneshown in fig.6.The wedge shaped optical member 80 con~ists of a plurality of ser-~n pentine or elongated S-shaped light guides 81, which on one side 82 engage the face plate of the cathode ray tube, whilst the other side determines a part of the plane face of the display panel. Therefore one side 82 of the wedge sha~ed optical member 80 is curved, in conformity with the curvature of the face place of the cathode ray tube, whilst the other side 83 is linear.
25 The input openin~ 84 of each light guide 81 arenormal to the corresponding area of the curved face plate of the cathode ray tube, whilst the output openin~ of each light guide 81 are normal to the face of the display panel.
Now referring to fig. 7 it will be explained in what manner the wedge shaped optical members 80 are applied to the face plate of the cathode 30 ray tube in order to remove said above two problems.
In fig. 7 the face plate of a certain cathode ray tube of the panel i9 in-dicated by reference numeral 9u,wnilst the face plate of the neighbouring cathode ray tube is indicated by the reference numeral 91. The gap existing between said face plates 90 and 91 is indicated by the reference symbol d.
35 Although the application of the wedge shaped optical membes 80 to the cathoderay tubes is described with respect to a particular face plate 90, it - -1338~

should be understood, that the same operation should be applied to all fa~e plates of the cathode ray tubes of the display panel.
From the centre N of the face plate 90 a plurality of ~edge shaped optical members 80 are placed radially and side by side on said face place 5and attached thereto. In fact the ~spherlcal surface of the face plate i9 trAn5 formed thereby in a flat snrface, bounded by a circle 92.
Assuming that the discontinuity between the display unit8 is the gap d between the face plates, the wedge shaped optical members 80 should for example cover half said gap d, that is.to say, should extend to the dotted lines 10 93. Therefore after the application of the wedge shaped optical members to the face plate, the same are cut, so that the circular boundary is transformed _ into a rectangular boundary.
Eventually in fig. 8 the filling up of the gap d is shown in ~ection.
Reference numeral 94 indicates the cathode ray tubes, whilst the reference 15 numeral 90 indicates the face plate of one of those cathode ray tubes and reference numeral 91 indicates the face plate of the other cathode ray tube . With the reference numeral 80 the wedge 3haped optical members are indicated and a~ain the m;A~Iepoint o~ t~e face plate 90 is indicated by the reference symbol N.

Claims (22)

1. An information display system characterized in that it comprises a computer device having at least one input member for re-ceiving video information and a processor member connected with said input member for processing and/or controlling digital video infor-mation contained in and/or obtained from the video information received from the input member and/or digital video information generated by the computer device itself in order to produce display data and con-trol-signals, a communication channel having a data bus and a control bus connected to the processor member of the computer device for the transmission of the display data and the control-signals respectively, a memory device connected to the data bus for storing the display data received from the data bus, a memory control-device connected to the control bus for controlling the storage of display data in and reading the stored display data from the memory device in response to control-signals received from the control bus, a digital/analogue converting device connected to the memory device for producing analogue display signals during reading the memory device and at least one display panel consisting of a plurality of electronic display units arranged side by side in a manner such that the respective display surfaces together constitute the display surface of the display panel.
2. An information display system as claimed in Claim 1 charac-terized in that the computer device furthermore comprises an analogue/
digital converting member connected to the input member for digitali-zing analogue video signals contained in the incoming video information and applying the digitalized analogue video signals to the processor member.
3. An information display system as claimed in Claim 1 characterized in that for each electronic display unit the memory and the memory control-device comprises at least one memory member and memory control-member respectively, in that the communication channel furthermore comprises an address bus connected to the processor member, whilst each memory member is connected to the data bus and each memory control-member is connected to the control bus and the address bus and in that the processor member comprises means for processing video information and generating address signals in a manner such that in at least two memory members connected to individual electronic display units such a processed part of at least the video information received from the input member is stored that the electro-nic display units concerned co-operate at least for displaying an original image contained in the video information received at the input member.
4. An information display system as claimed in Claim 3 charac-terized in that all electronic display units of the display panel co-operate at least for displaying an original image contained in the video information received from the input member.
5. An information display system as claimed in Claim 3 characterized in that the electronic display units of the display panel co-operate for the combined display of both an original image contained in the video information received from the input member and the video information internally produced by the computer device.
6. An information display system as claimed in Claim 5 charac-terized in that a number of the electronic display units of the display panel co-operate for displaying an original image contained in the video information received from the input member and in that the re-maining number of electronic display units of the display panel co-operate for displaying the video information internally produced in the computer device.
7. An information display system as claimed in Claim 1 in which the incoming video information contains or consists of analogue black/white or colour video signals and synchro-nizing signals characterized in that the input member comprises a multiplexer sub-member for multiplexing the black/white video signal or the red, green and blue video signals and for applying the multi-plexed signal to the analogue/digital converting member, in that the communication channel comprises a synchronisation bus for the trans-mission of synchronizing signals, whilst the input member passes the synchronizing signal to the processor member and the synchronisation bus and the memory control-members and the electronic display units are connected to the synchronisation bus and in that the digital/ana-logue converting device connected to each memory member comprises a digital/analogue converter for black/white or a digital/analogue converter for red, green and blue.
8. An information display system as claimed in Claim 7 in which the incoming video information contains interlaced television video signals characterized in that each electronic display unit comprises a display tube, a display member for producing at least one electron beam, for deflecting the electron beam(s) and for controlling the instantaneous intensity thereof and for each raster of a half image a memory member, a memory control-member and one or three digital/
analogue converting members and in that each memory control-member produces a fly-back suppressing signal for one or, respectively, three digital/analogue converting members.
9. An information display system as claimed in Claim 8 charac-terized in that each electronic display unit comprises a display tube and three insertable printed circuits, one print being provided with the display member and the second and third prints having each a memory member and a memory control-member and one or three digital/

analogue converting members.
10. An information display system as claimed in Claim 1 in which each electronic display unit comprises a display tube characterized in that in front of the front plate of each display tube of the display panel a flat Fresnel lens is arranged so that the images of neighbouring display tubes are magnified so that the image displayed by the panel is free of discontinuities.
11. An information display system as claimed in Claim 10 characterized in that the Fresnel lenses have a minimum of 60 grooves/cm.
12. An information display system as claimed in Claim 10 or 11 characterized in that the Fresnel lenses are arranged in front of the front plates of the respective display tubes at least so as to engage one another.
13. An information display system as claimed in Claim 1 in which each display unit comprises a display tube characterized in that on one side the front plate is shaped in conformity with the screen of the display tube and is flat on the other side and in that optical fibres are provided in the front plate so as to extend from the side of the front plate adjoining the screen to the flat side of the front plate in a manner such that they spread in fan-like fashion from the centre of the screen towards the periphery of the screen to the flat side of the front plate.
14. An information display system as claimed in Claim 1 in which each display unit of the panel comprises a display tube characterized in that at the circumference of the front plate of each display tube prisms are arranged in a manner such that they optically fill out the imageless gaps between the respective front plates of the display tubes of the display panel.
15. An information display system as claimed in Claim 14 characterized in that the prisms of neighbouring display tubes at least substantially adjoin one another.
16. An information display system as claimed in Claim 14 or 15 characterized in that each prism is formed by a plurality of transparent bars separated from one another by a layer of reflective material, the array of the various bars being such that they are relatively off-set on the side of the prism opposite the side adjoining the display tube.
17. An information display system as claimed in Claim 14 characterized in that each prism is formed by a plurality of relatively adjoining conical light conductors.
18. An information display system as claimed in Claim 17 characterized in that the light conductors are arranged so that the prism adjoins on one side the front plate of the display tube and are in line on the other side, said line being directed opposite the curvature of the front plate of the display tube.
19. An information display system as claimed in Claim 1 in which each display unit comprises a display tube, characterized in that a plurality of light guides are attached to the exterior surface of the face plates of each display tube in a manner such that they spread in fan-like fashion from the centre of the face plate towards the periphery of the face plate, wherein the plane of the input openings of the light conductors are normal to the relative parts of the face plate and the planes of the output openings of the other light conductors are normal to the viewing plane and determine a flat viewing surface, bounded rectangularly and filling up at least a part of the discontinuities between neighbouring display tubes.
20. An information display system as claimed in Claim 19, characterized in that the light guides are serpentine or elongated S-shaped, and a certain number of said light guides are forming a wedge shaped optical member, whereof one side is linear and the other side is curved in conformity with the curvature of the face plate of the cathode ray tube, whereby a plurality of said wedge shaped members are attached to said face plate radially from the middlepoint thereof, and the circular boundary of said wedge shaped optical members is transformed into a rectangular one by cutting, so that at least a part of the discontinuities between the neighbouring face plates or display units is filled up.
21. A display panel apparently intended for use in a system as claimed in Claim 1.
22. An insertable print apparently intended for use in the system claimed in Claim l.
CA000424162A 1983-01-21 1983-03-22 Information display system Expired CA1213386A (en)

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US06/459,975 US4761641A (en) 1983-01-21 1983-01-21 Information display system
US459,975 1990-01-02

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KR (1) KR870000732B1 (en)
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AU (1) AU567290B2 (en)
BR (1) BR8301614A (en)
CA (1) CA1213386A (en)
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ES (1) ES8407223A1 (en)
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JPS59137986A (en) 1984-08-08
ATE29940T1 (en) 1987-10-15
EP0114713B1 (en) 1987-09-23
AU1270083A (en) 1984-07-26
KR870000732B1 (en) 1987-04-09
EG15330A (en) 1988-03-30
ES520851A0 (en) 1984-09-01
ES8407223A1 (en) 1984-09-01
EP0114713A1 (en) 1984-08-01
US4761641A (en) 1988-08-02
AU567290B2 (en) 1987-11-19
DE3466458D1 (en) 1987-10-29
KR840004646A (en) 1984-10-22
BR8301614A (en) 1984-11-06
MX155243A (en) 1988-02-09
GR73127B (en) 1984-02-07

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