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`EXHIBIT 1
`
`

`

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`Case 1:16-cv-04586-LTS-HBP Docu
`Case 1:16-cv-O4586-LTS Docunmml-mflmimi
`Mlllllllllfilll
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`
`(19; United States
`02) Reissued Patent
`US RE39,470 E
`(10) Patent Number:
`Jan. 16, 2007
`(45) Date of Reissued Patent:
`Hylin et a].
`
`(54 DIGITAL INFORMATION SYSTEM
`
`353/42
`701/200
`707/l04
`
`Hinman ct a1.
`Tanikoshi ct 3].
`Harrison et a].
`Szlam ct al
`0160
`Miyashitn
`Schmier et 01
`Mehovic
`
`
`
`
`i 10/1996
`5,568,279 A
`5/1997
`5,634,018 A
`t<
`6/ 1.997
`5642.484 A
`10/1997
`5,675,637 A i)1
`4/1998
`5,745,688 A
`if
`7/ l 998
`5,732,548 A
`’1
`‘ 12/1999
`6,006,159 A
`at
`9/2000
`6,122,642 A
`
`*»
`
`FOREIGN PATENT DOCUMENTS
`
`AU
`
`GB
`W0
`W0
`
`A48849/90
`2634295
`2 288 474
`WT) 93/16459
`WO 96/08113
`
`8/1990
`1/1990
`8/1985
`8/ l 993
`3/1996
`
`OTHER PUBLICATIONS
`
`(75
`
`(21
`
`(22
`
`
`
`(73 Assignee: T-Rex Property AB, Danderyd (SE)
`
`Inventors: Mats Hylin, Dandcryd (SE); Mats
`Dalllgren, Helsingborg (SE); Joakim
`Jonason, Lidingo (SE)
`
`App]. No.: 09/821,969
`
`Filed:
`
`Mar. 30, 2001
`
`Related U.S. Patent Documents
`
`Reissue of;
`(64
`Patent No.:
`Issued:
`App]. No:
`Filed:
`
`6,005,534
`Dec. 21, 1999
`08/676,517
`Jul. 2, 1996
`
`US. Applications:
`(60)
`Provisional application No. 60/017,403. filed on May 14,
`1996.
`
`(30)
`
`Foreign Application Priority Data
`
`Apr. 26, 1996
`
`(SF) ........................................... 96016035
`
`(51)
`
`Int. Cl.
`G09! 2 7/00
`00917 19/18
`00917 15/00
`GO9F 1 9/12
`G06F 13/04
`
`(2006.01 )
`(2006.01)
`(2006.01)
`(2006.01)
`(2006.01)
`
`U.S. C1.
`
`345/11; 345/22: 705/5;
`705/6
`345/11
`Field of Classification Search
`345/12. 21, 2.2, 3.1, 7; 705/5. 6: 349/5—7
`See application file for complete search history.
`References Cited
`
`(52) ,
`
`<58)
`
`(56)
`
`U.S. PATENT DOCUMENTS
`3/1992
`Esch et at.
`5.099.319 A
`4/1995
`5,404,185 A *
`Vogeley e1 Lil.
`5/1995
`5,412.416 A
`Nemirofsky
`Marlin
`9/ 1995
`5,448,263 A *
`Schiller et al.
`3/1996
`5,499,046 A
`4/1996
`()kouchi
`5,508.71} A ’1‘
`10/1996
`lshikawa et al.
`5,565,911 A *
`
`K» ’J‘I‘9’ m J!
`
`345/173
`
`IBM Digital Media Distributor.
`unknown.
`
`IBM brochure. date
`
`“‘ cited by examiner
`
`Primam Examiner—Bipin Shalwala
`Assistant Examiner—David L. Lewis
`('74) Attorney, Agent, or Finn—Pierce Atwood LLP; Kevin
`M. Farrell
`
`(57)
`
`ABSTRACT
`
`Hie invention relates to a digital nifiirmatn‘nn system ([0) thr
`displaying information on at least one display means with
`the aid of at least one projector (22). The exposures are
`presented at places accessible to and frequented by a general
`public. The information system (10) includes external intbr»
`[nation mediators (24) and inlbrmntion is controlled dynami-
`cally through the medium of a communication interface (26)
`and through the medium of an exposure handler in a central
`computer (28). The inventive system also include a com~
`mLuncation interface (14) against an elective number of
`station computers [34) having connected projector compili-
`ers (38) which control projectors {22) for displaying pictures
`or exposures. The station computers (34) untl peripheral
`equipment are situated at mutually distanced places. Accord—
`ing to one particular field of use. the. places mentioned are
`subway stations (16, 18. 20) and projectors (22) project
`exposures or pictures onto display means positioned at
`selected places in the stations (16. '18, 20).
`
`26 Claims, 1 Drawing Sheet
`
`
`
`24. lumnmau
`neat/noes
`
`ID
`
`as, pause/ran
`oouPuTEHS
`
`
`
`22. PHDJECTCR
`
`

`

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`US. Patent
`Jan. 16, 2007
`US RE39,470 E
`
`1?
`
`so, DATABASE
`
`
`
`24. INFORMATION
`MEDIATUHS
`
`25. MODEM
`
`
`
`
`
`STATIONS WI
`
`23,OENTF-lAL l
`
`
`30. DATABASE
`
`o
`"" ,
`
`o g
`
`WORKING
`
`
`COMPUTER
`
`con-mom. CENTRAL
`
`3 2
`
`1
`
`.
`
`E; 14, RADIO LINK
`'
`
`mew:
`STAT 3
`36
`
`1
`
`16
`34, STATION
`GOMPUTER
`"
`
`36
`13
`0,-
`fir: :
`a!”
`
`34
`
`36
`
`20
`
`~34
`
`STATION 2
`
`STATION 3
`
`
`
`——-—— .E— ;1\
`as, PROJECTOR
`10
`COMPUTERS
`
`22. PROJECTOR
`
`

`

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`1
`DIGITAL INFORMATION SYSTEM
`
`US 111339.470 E
`
`2
`
`m
`
`10
`
`15
`
`Matter enclosed in heavy brackets [ ] appears in the
`original patent but forms no part of this reissue specifi—
`cation; matter printed in italics Indicates the additions
`made by reissue.
`
`RbLA'l‘lz‘D APPLlCAl'lON
`
`This application claims priority to the provisional US.
`patent application No. 60/017403 entitled “Communication
`System”, filed May 14, 1996.
`
`TECHNICAL FIELD
`
`The present invention relates to a method and [to] appa-
`ratus for controlling and coordinating projectors in a digital
`information system for displaying information on at least
`one display device through the medium of at least one
`projector for each said device, said information being dis-
`played in places that are accessible to and frequented by a
`general public. In one particular aspect, the invention is
`applied to control projectors for displaying information
`directed towards people in such places as main railway
`stations. subway stations. airport waiting lounges. etc.
`
`DESCRIPTION OF ITIE BACKGROUND ART
`
`Systems that are used to show information in the form of
`advertisements. timetable messages or atrrivnl and departure
`times in present-day public service infrastructures with
`regard to buses. Lrains. subway traffic. etc. [is] are of a static
`nature. Such information is given on notice boards. posters,
`charts. tables. verbally through loudspeakers. and on digital
`displays, etc. A characteristic feature of such information
`media is that the information media is not coordinated. but
`is in the form of individual items which are controlled and
`
`3 0
`
`attractive manner. often with rapid picture changes and
`overlaps. so as to avoid the risk of boring viewers. as with
`conventional display with diapositivc projectors. The com-
`puter control 01" such systems may well be both complicated
`and advanced. Unfortunately. these systems are nevertheless
`static insofar as they are used in one and the samc'lriealisy;
`and controlled and managed on the display site. The display
`must be planned carefully beforehand. this planning often
`being carried out by experts within the technical field in
`question. so as to obtain a finished display product. For
`instance, when a company wishes to change its display and
`introduce a new picture series combined with sound, the
`process again becomes static by virtue of the need to employ
`experts to program and arrange the new display.
`the same problem as that mentioned above is also met
`when showing pictures through diapositive projectors in one
`and the some locality. because the display subscriber has
`very little chance of influencing the display, especially in
`real time. The picture display is directed towards a limited
`public and towards scheduled display of one and the some
`information material to the public concerned. the picture
`dis play is not directed to a large number of people. as in the
`case of a railway station platform. a subway platform or in
`airports. in places of this nature, it should be possible to
`spread the information and to display diii‘crent information
`in different places within said stations and tl should be
`possible to update and change the information quickly.
`When the information displayed on said station is nol
`effectively coordinated. the displays on which inionnation is
`presented will often become sonic. for instance show the
`time of the next display or show a pause picture. Lg, dead
`time This becomes nerve-wrecking to travellers. who ofien
`wait for long periods in waiting balls or stand on platlhrrns.
`Neither is the failure to utilize expensive information display
`equipment to the highest possrble degree compatible with
`good economy.
`'
`
`Si N MARY OF THF lNVRWON
`
`updated separately. oficn manually.
`[Modem] Modern digital displays used. cg: in conjunc-
`tion with subway milivay’trafiic [gives] give some of the
`aforesaid information but [is] are not controlled to display
`advertisements, warning messages. etc. Furthermore,
`the
`information is often supplemented wuh verbal messages
`transmitted from traffic control centres. The information
`channel cannot be subscribed to directly for the display of
`external information suppliers. such as advertising burcaux,
`the authorities, newspapers. etc, but is processed adminis-
`tratively and fed manually into the information display
`systems.
`Although the administration of information is often pro-
`cessed manually with the aid of modern computer
`technology,
`the available display time will nevertheless
`contain “dead time”. among other things due to back
`logging caused by the manual infeed process.
`'lhus. present-day systems do not enable information to
`be updated dynamically for display in real time. Neither do
`present—day systems enable external mediators to update
`information for display in a central control system, not yet
`the administrator who makes the display of information
`available. but [that] it is the administrator who determines
`when. where and how the information shall be displayed.
`The present-day static information display systems are
`therefore beset with a number of problems.
`Also known to the art are systems for displaying or
`showing picture series in local public places. such as assem~
`bly halls, lecture halls, and conference rooms in industry.
`The systems comprise diupositive projectors which are
`controlled to display pictures,
`images and sound in an
`
`40
`
`n.n
`
`50
`
`:35
`
`60
`
`An object of the present invention is to provide a flexible
`system in which external information mediators are able to
`dynamicnlly control in real time the transmission ol'rtispluy
`instructions to a larger public in difierent places sintated at
`on; chosen distance apart through projectors which project
`im‘ormation onto displays intended [hercfor] therefor.
`Another ob_1eel of the invention is to enable pictures1
`images. messages and announcements to be configured in
`accordance with modern digital technology. therewilh pro—
`viding rapid communication.
`A further Ul3_|eCl of the invention is to enable a picture.
`image or other information to be changed in practice as often
`.ll‘
`as is desired, in real
`time. therewith providing direct and
`
`immediate communication, and to enable similar or specific
`information to be displayed in places thul are mutually liir
`apart and to enable message information to be alternated
`with advertising spots. for instance.
`According to one aspect, the present invention telates to
`a method of coordinating and controlling projectors in a
`digital information system for displaying information on at
`least one display device through the medium of at least one
`projector for each such display device. said information
`being displayed in places that are generally available to and
`frequented by a general public.
`Informal lion display subscribers are connected to a com»
`. puterized control centre via computer and telecomnuutica-
`lion interfaces for nll-duy-round transmission of
`information. wherein the control centre has a communica-
`
`

`

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`3
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`US RE39,470 E
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`tion interface [against] wit/z computerized devices situated in
`connection with said places for projector coordination and
`control.
`
`LA
`
`The present invention also relates to an arrangement of
`:Ippnrtttus for carrying out the aforesaid method. said appu-
`ratus including the aforesaid devices and an exposure han-
`dler which creates the exposure list.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`.
`
`The following description makes reference to the text in
`the accompanying drawings to provide a better understand-
`ing of the embodiments of the present
`invention, said
`drawings illustrating schematically a system for coordinat-
`ing and controlling projectors in a digital information system
`for displaying information in accordance with the invention.
`
`DETAILED DESCRIPTION OF PREFERRED
`EMBODIMENTS OF THE INVENTION
`
`the present invention relates to a method for the dynamic
`coordination and control of projectors in a digital informa-
`tion system for displaying information on at
`least one
`display device via at least one projector for each display
`device, whctcin the im'onnation is displayed in places that
`are accessible to and frequented by a general public. The
`invention also relates to an arrangement of apparatus for
`carrying out the method.
`Although implementation of embodiments are limited in
`the followmg to subway railway stations.
`it will he tinder—
`stood that the invention is not restricted to these embodi-
`ments. As before. mentioned. the inventive system can be
`used in places where large sections of the public are known
`to Visit. such as railway stations. airports. outdoor locations,
`etc.. in addition to subway stations.
`Preferred embodiments ot the in motion Will now be
`described in detail with reference to the accompanying
`drawings, which illustrate schematically a system It) for
`coordinating and cnntn'illing projectors in a digital informa—
`tion system for displaying information on display devices,
`such as free standing picture screens. wall-mtmnted screens.
`walls, and overhead screens or other means suitable for
`rcproducmg or exposing picture information in the form of
`text, stills. movable pictures.
`images. etc. (displays not
`shown to the drawing).
`In the main, the system is comprised of a control centre
`12 having a communication interface 14 which connects an
`unlimited number of computerized devices 16, 18. 20 which
`are placed at desired distanccsti-om’onc another for the
`control of protectors 22 whose protector images or pictures
`are displayed in the aforesaid public places.
`The illustrated system also includes an advertising agency
`which is connected to the control centre 12 through the
`meditun ol'a computer 24 and u modem 26. Although only
`One modem is shown connected to the central computer 28
`of the control centre,
`it will be understood mm modem
`[poles] pools. telephone switching centres and other similar
`devices may be used to this end in accordance with present—
`day techniques.
`The central computer 28 in the control centre 12 also
`includes database; 30. in the illustrated case two databases.
`The databases 30 may be externally connected to the central
`computer. The control centre also includes working stations
`32, which are preferably connected to the central computer
`28 via a Local rhea Network (LAN) in accordance with
`known techniques. The working statio‘ns‘SZ are used by the
`personnel serving the control centre 12.
`in monitoring,
`checking. maintaining and updating functions in the central
`computer with its thtlubnses. 'lhe control centre administrat—
`tcr is able to insert projector control instructions via the
`
`
`
`The control centre is able to create and update a display
`list in real time with control instruction fields via booking
`information for display dynamically in time from mediators
`having drive routine means which are connected to the
`subscription and which are transparent for the transmission
`of information to the drive rouline means of the control
`centre for transmission of information in the system.
`'Jhe display list. which includes control
`instructions.
`coordinates and controls the projectors concerned with
`regard to What shall be displayed, when it shall be displayed.
`where it shall be displayed and for how long it shall be
`displayed. and causes each projector. independently of other
`projectors, to receive the same or ditTerent information for
`display through respective projectors and through the com—
`puterized devices, in accordance with the display list.
`The administrator of the digital information systemis able
`to update the display list with desired information at any
`time whatsoever. wherein the dynamic booking can be
`changed or delayed.
`The projector may also inten'upt‘ display of information
`when the allocated display devices. or the projector. islan-
`visually obstructed in said public place. The projector lens
`can then be covcrcdtiwilhjia protective device when a dirty
`atmosphere is detectcd‘or‘amicipated and which is [imma—
`nently] innninemly likely to dirty the lens.
`In one embodiment, the [projectors] prefer/"r is provided ‘
`with a projector computer which controls and delivers
`exposures to the projectors controlled by a server included
`in the computerized device. wherein the projector computer
`has a buffer memory which is filled with subsequent expo~
`sures as the exposure to be displayed at that moment via the .
`projector is emptied from the bufl‘er memory
`Alternatively; a server included in said computenzed
`device is provided with a projector computer which controls
`and feeds exposures to the projectors, wherein the pmjector
`computer is connected to a buffer memory which is filled
`with subsequent exposures as the exposure current at that
`particular moment is displayed though the projector and
`emptied from the butter memory.
`A server situated in a specific place and included in .1
`computerized device litrthcr includes databases. and inter-
`tnaticn in the databases concerning exposures in the expo-
`sure list is copied in databases of servers in a selected
`number of computerized devices situated in other places.
`In one embodiment.
`the exposure list may include
`reserved instmction fields for updating with control instnte— _
`tions via the mediator interface. wherein the control instruc-
`tions can be placed in a waiting line. or queue, when the
`exposure list lacks instruction updating fields at that moment
`in time.
`
`tou:
`
`'
`
`J!
`
`is
`
`Ur'1‘
`
`In another embodiment of the invention. a switch detects
`when a station computer is not functioning, wherein those
`projectors controlled by the station computer are controlled
`by another station computer situated at some other place.
`A further embodiment can also be used as “feedback" and
`monitoring in statistical analysis by a system administrator
`with respect to whether or not vehicles keep to the timetable.
`when the display of information is interrupted either because
`the display device is obstructed or because the projector is
`obstructed. In one embodiment,
`the computerized devices
`comprise an electronic display with control computer.
`wherein projectors are comprised of electronic displays.
`
`

`

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`US RE39,470 E
`
`t)!
`
`10
`
`[5
`
`2C)
`
`6
`In one embodiment of the invention relating to subway
`station 1.
`the computerized device 16 is comprised of u
`station computer (server) which either includes or is con-
`nected externally to a hard disk 36. wherein the station
`computer 34 is connected to a plurality of projector corn-
`puters 38. three such projector computers in the illustrated
`case. which transmit control information to connected pro-
`jectors 22, only one of which is shown. The projector
`computers 38 have the form of PC units with picture screens
`in the illustrated case. The information sent to projectors 22
`can be monitored on the picture screens of the PC units 35
`and edited by personnel stationed at difiererrt
`locations
`wilhin the subway station 16, or from a central location In
`the illustrated embodiment. station 2. referenced 18, and
`station 3, referenced 20. comprise other subway stations that
`are equipped with devices similar to the devices of the
`subway station 16. although wilhoul showing the projector
`computers 38 and the projector 22. It is assumed, however,
`that these stations also include projector computers 38 and
`at least one projector 22.
`In an alternative embodiment of the device or devices 38.
`i.e. the projector computers 38, are included in the station
`computer 34, the projector or projectors 22 its/are controlled
`directly from the station computer .14.
`In yet another embodiment of the devices included in the
`computerized devices 16. 18. 20, the projector 22 is replaced
`with an electronic display (not shown), such as a large
`picture screen in LCD technology.
`light-emitting diode
`technology (LED technology) or the like. The station com-
`puter 34 is their Included in the large picture screen or is
`connected externally thereto. Preferably. the projector coni-
`putcr 38 in the station computer 34 and the database 36 are
`also included. [inbrmation is transmitted from the control
`centre 12 generally In the same manner as that before
`described. However, each separate largepictute screen may
`be addressed directly through a ‘1an network 14. wherein
`the screens are controlled fronttlte crja‘ntml centre 12 which
`includes redundancy. Thus. in the illustrated case, the com-
`puterized devices ‘16, [8. 20 form on electronic display with
`control computer 34. said projector 22 cifecting the display.
`According to one embodiment. thC computerized devices
`[6, 18, 20 may include redundancy by virtue ofall databases
`36 ot‘hard disks on the stations 16.18. 20 including the some
`projector control in formation or instructions for monitoring
`the system in a subway station 16. 1'8. 20. Thus. all infer»
`mation is copied between the station computers 34 and their
`databases 36 via the communications interface 14 from the
`central computer 28. This means that a mmpnterimd device
`for displaying information in a subway station via projectors
`22 will not be disabled should one or two of the stations
`shown in the drawing sufler a computer or hard disk power
`down in a station computer 34. In the event ofa power down
`in a station computer 34. the communications interface 14
`'Jt'J
`, can be coupled to a switch which automatically bypasses the
`station computer and connect projectors 22 connected to the
`power down compuler 34 to one ol‘lhe station computers 34
`that
`is still in function (the switch is not shown in the
`drawing).
`The digital information system 10 has been described in
`the aforegoing with regard to respective hardware and
`interfaces.
`Implementation of the present
`invention in
`achieving the objects and purposes thereof will now be
`described more specifically.
`The illustrated central computer 28 is divided into three
`powerful servers I. 2. 3. ufwhich sort-er 1 receives muleriu]
`ii'onr external information mediators 24. via modems 26.
`
`5
`working stations. for instance when information is directed
`specifically to travellers and passengers traveling by ship,
`train. subway. aircraft or some other vehicular traific who
`require specific information. The information may concern
`the arrival times and departure times of passenger-carrying
`vehicles;l..7fhe administrator controls internally how. what.
`when or‘where the information shall be displayed by the
`projectors 22. An important feature in this context, however,
`is that external information mediators 24 are able to give
`control instructions to the projectors 22 with regard to the
`information that the external mediators 24 desire the system
`10 to display Via the projectors 22. each on its own initiative
`and commtmication-wise transparent via modems 26. This
`can be achieved in accordance with one embodiment of the
`invention without involving the working stations 32 in the
`procedure of transmitting the control
`instructions to the
`central computer 28.
`The term information mediator (24) used in the firllowmg
`shall be interpreted in its widest meaning, i.e. as not only
`referring to advertising agencies but
`to all companies and
`private persons who wish to utilize the system II) for
`eommercml reasons or for Ihe display of inliirmnlion lhal
`concerns a general public. At present a mediator which
`wishes to display information in public places is normally
`forced to wait about two weeks. perhaps longer. before his
`order can be implemented and the information publicly
`displayed. With the inventive digital information system 10.
`the information can be displayed principly in real time. i.c.
`at the time of making the order, possibly with a short delay
`due to processing. fully-booked exposure lists and other
`quickly passing causes. Furthermore. an external informa-
`tion mediator 24 is able to put through information to the
`system 12 twenty—four hours a day, whereupon the infor-
`mation can be included instantaneously 111 an exposure list,
`as illustrated in more detail below.
`'lhose external information mediators which connect to
`the control centre 12 via modems arc, in one embodiment of
`the invention, connected to the. control centre vialspecially
`designed interfaces (drive routine means) for data and
`tolecommtmication In this way, only external mediators 24
`having the correct interface are able to connect transparently
`to the control centre 12 for delivering control instructions in
`the proloctors 22. which avoids unauthorized access to the
`display of such information and misuse ofthc system. In this
`regard, the special interface. which may be included in the
`computers of external mediators, also includes commer-
`cially available code keys or other codes sent between the
`control centre 12 and the computer 24 of the external
`mediator to verify the right to enter control instntetitms into
`the central computer 28, without the administrator needing
`to supply through the working stations 32 further infortna~
`tion or authority permitting access of the external informa-
`tion mediators 24 to the central computer for transmitting
`system transparent control instructions to the projectors 22.
`In accordance with the invention, the control centre 1 2 has
`a communication interface 14 [against] with the computer-
`ized devices 16, 18. 20 situated on shifting positions or
`placcs for projector coordination and control.
`The drawing shows specifically a radio link which forms
`an interface between the control centre 12 and the comput—
`erized devices 16. 18, 20. this interface being a preferred
`interface, although not necessarily the sole possible inter.
`face. Other interfaces for transmitting information between
`the control centre 12 and the computerizal devices 16, 18.
`20 may consist of a cable-carried ISDN solution (integrated
`Services Digital Network) or other fixed lines that have the
`same capacity.
`
`51‘ ii
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`1,. u-
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`40
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`50
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`0VI
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`

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`Case 1:16-cv-04586-LTS-HBP Document 55-1 Filed 07/19/18 Page 7 of 13
`Case 1:16-cv-04586-LTS-HBP Document 55-1 Filed 07/19/18 Page 7 of 13
`Case 1:16-cv-04586-LTS Document 1-1 Filed 06/16/16 Page 7 of 13
`Case 1:16-ev-O4586-LTS Document 1-1 Filed 06/16/16 Page 7 of 13
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`US Ill-339,470 E
`
`7
`Server 2 sends information material to the station computers
`34. line some material can be senile all station computers
`34. even though the information is to be displayed solely on
`a given display or on given displays. What shall be exposed
`and where it shall be exposed will be explained in more
`detail below.
`
`Server 3 functions to process information and control
`instrttctions received from the information mediator 24. as
`described in more detail blow.
`
`The server 3 of the central computer 28 functions partly
`as an exposure handler. The exposure handler 3 carries oul
`the important object of the invention with regard to the
`possibility of an external mediator 24 to organize the infor—
`mation delivered to the station 16, 18, 20 via an exposure
`list. this organizing ofint’ormation being cflocted in real time
`via the modem 26 and the server 1 that receives projector
`control information from the external mediator.
`
`In one [invention] embodiment of the invention. a queue,
`or line, is created from the information material received by
`the server 1, in accordance with some known line or queuing
`method. such as FIFO (First In First Out]. LlF‘O (Last to
`First Out] or Round Robin, etc. wherein the server 3 or
`exposure handler 3 has set-up or created an exposure list
`which covers a twenty-four hour period for infonnntton
`exposure or display via projectors 22. The exposure handler
`3 collects and pn‘tcesses. i.e. allocates. information relating
`to projector contml instructions. wherein mediator informa-
`tion is sorted into the exposure list in accordance with the
`wishes nt'the mediator 24 or its instructions. when available
`spa-tee is found in the exposure list or in alternative places in
`the exposure list given by the mediates If‘ the exposure list
`is completely filled with inslrnctions. the mediator instruc-
`tions to the control centre remain in the queue list in the
`servo 1 in readiness for later inclusion in the exposure list,
`in accordance with a preferred embodiment
`in one embodiment olilhe invention. the exposure handler
`3 creates or allocates a data message (data field) including a
`header. in control character field. an address field. optionally
`at least one CRC field (Cyclic Redundancy Code). and
`optionally status dogs which identify and are connected to
`the infonnatton from an infotmation mediator 24 and filed in
`the exposure list in the time inte 'le that the intbrmation
`shall be exposed or displayed through a projector 22. This
`constitutes an alternative to the insertion of the entire
`information bit from an external mediator 24 in a specific
`time interval in the exposure list, and enables the provision
`of an exposure list that contains much less information and
`which is thus easier to handle. and to accelerate transmission
`of the list between computers and databases included in the
`system.
`A data message in the exposure list can be understood
`here as being a control instruction in an instruction field for
`activating projectors 22 to project information.
`A data message of this kind connected to each individual
`information exposure enables known HASH or switching
`methods to find information included in the exposure time
`intervals ill the exposure list both effectively and quickly. A
`First Class® server can be used conveniently for commu-
`nications transmission between external information media-
`tors 24 and the control centre 12, Each external information
`mediator is then able to send an e-mail with included
`information material in any chosen format. which provides
`the advantage of not needing to write in any new software
`for the communication transmission function. As before
`mentioned.
`the system also incorporates a safety aspect.
`whereby each external information mediator that has an
`
`8
`ofiice or when subscribes to the system must possess a coded
`drive means or at coded drive routine in order to connect. to
`the control centre ‘12.
`In order for external information mediators 24 to be able
`
`to deliver complete picturest’films. the mediator will prefer-
`ably have its own V ersions ol' the software that the exposure
`handler 3 uses for enabling pictures/films to be introduced
`transparently into the exposure list without processing via
`the working stations 32 in the control centre 12.
`In one embodiment of the invention, there is thus included
`an alternative to the dynamic updating of the exposure list as
`mentioned in the aforegoing. Le. the external information
`mediators 24 which do not have access to software in the
`
`t)!
`
`10
`
`.
`
`exposure handler are provided with the possibility ofhaving
`their picture material or exposure material processed by
`tutu tip.
`personnel serving the working stations 32, whet 'rt... said
`' personnel enter, via the working stations 32, the infonnattttfi
`that the external mediator 24 wishes to have exposed, or
`displayed, via projector control instructions in the exposure
`handler and via the exposure list created by the handler.
`Personnel at the working stations 32 are thus able to inter-
`rupt any queue lists in the server 1 to update the exposure
`list, Via the exposure handler, with ltlfi‘lt‘ttlatlon generated
`centrally "from the control centre 12 or with information that
`is msulItciently processed when received by the sewer 1
`from the external information mediator 24.
`
`In accordance with the aforegoing. external information
`mediators 24 that have access to the exposure program are
`able to deliver complete picture senosflilms which can be
`pr