BE897174A - Optical recording-reproducing appts. for motor vehicle - uses EEPROM to lock laser read head at present position when power supply is interrupted - Google Patents

Optical recording-reproducing appts. for motor vehicle - uses EEPROM to lock laser read head at present position when power supply is interrupted Download PDF

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Publication number
BE897174A
BE897174A BE0/211088A BE211088A BE897174A BE 897174 A BE897174 A BE 897174A BE 0/211088 A BE0/211088 A BE 0/211088A BE 211088 A BE211088 A BE 211088A BE 897174 A BE897174 A BE 897174A
Authority
BE
Belgium
Prior art keywords
disc
interrupted
information
laser
reproduction
Prior art date
Application number
BE0/211088A
Other languages
French (fr)
Original Assignee
Staar Sa
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 Staar Sa filed Critical Staar Sa
Priority to BE0/211088A priority Critical patent/BE897174A/en
Publication of BE897174A publication Critical patent/BE897174A/en
Priority to US06/608,878 priority patent/US4527265A/en
Priority to NL8402018A priority patent/NL190793C/en
Priority to IT21638/84A priority patent/IT1196169B/en
Priority to CH3118/84A priority patent/CH657931A5/en
Priority to DE19843423887 priority patent/DE3423887A1/en
Priority to JP59133397A priority patent/JPS6028081A/en

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20Driving; Starting; Stopping; Control thereof
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02Details
    • G11B17/04Feeding or guiding single record carrier to or from transducer unit
    • G11B17/05Feeding or guiding single record carrier to or from transducer unit specially adapted for discs not contained within cartridges
    • G11B17/051Direct insertion, i.e. without external loading means
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02Control of operating function, e.g. switching from recording to reproducing
    • G11B19/14Control of operating function, e.g. switching from recording to reproducing by sensing movement or position of head, e.g. means moving in correspondence with head movements
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/11Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/0857Arrangements for mechanically moving the whole head
    • G11B7/08576Swinging-arm positioners
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00Record carriers by type
    • G11B2220/20Disc-shaped record carriers
    • G11B2220/25Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537Optical discs
    • G11B2220/2545CDs

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

A disc is mounted on a drive comprising a motor fitted with a drive plate. The read/record assembly comprises a mobile laser mounted on a lever which rotates about a pivot on the chassis. The opposite end of the lever supports a balance weight . A plate under the chassis is subjected to spring action to move it about a pivot. This plate is attracted by an electromagnet acting against the spring to allow free movement of the laser support lever when power is applied. When the power is interrupted the lever is locked into its present position. In place of the locking lever system a microprocessor can provide control of the read assembly and provide slaving of the loading of the disc to the processor programs. An EEPROM stores laser position data and information relating to the position at interruption of the power supplies.

Description

       

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



  La prcsente invention se rapporto aux tourne-disques. plus particuliSreaentceuxMont < $ dan$ des véhicules er concerne spécislement ceux à lecture optique (rayon laser). 



   Lorsqu'un disque est   joue dans   un tel appareil des que le fonctionnement du véhicule est interrompu, 
 EMI1.2 
 l'appareil est mis hors tension si bien que lors de la prochaine utilisation, 1a lecture des informations portées par le disque en vue Je leur reproduction recommence au tout début de zelles-ci.   oui,   ce phénomène est particulièrement désagréable car avec les lecteurs ä cassette ou autre moyen de reproduction, l'utilisateur est habitué à ce que la lecture des   informaticns   portées par le support, reprenne tres exactement à l'endroit où elle a été interrompue. 



   Le but de la   u'esente   invention est de   ru ter   à cet inconvénient et de permettre avec des moyens de conception simple, peu coûteux et fiables, de reprendre 
 EMI1.3 
 daas le cas de disqe, la lecture lä oü elle a cte interrompue. 



  En vu de realiser ce but, le dispositif objet de 1'inention est ? ssentielleent caracteris- en ze qu'au t-urne-disque sont assodcs des Doyens mecaniques, électriques ou électroniques assurant la mémorisation des informarions relatives à un disque (telles que : codagc des different morceaux, titres, vitesse de rotation,...) positionné dans ledit tourne-disque et l'endroit oü la reproduction des informations a été interrompue et ce'a cussi kongtemps que ledit disque n'est pas retiré, soit manuellement, soit automatiquement. 



   Afin de bien faire comprendre l'invention, on en décrira ci-agrès deux moles de réalisation non   limai-     natifs   en se référant aux dessins dans lesquels : - la figure 1 est une vue partielle de dessus d'un tourne-disque dans lequel on n'a représente que les 

 <Desc/Clms Page number 2> 

 éléments nécesaire à la comprehension de   l'invention ;   - la figure 2 est   une vu de c6te dudit   tourne-disque dans sa position op6rative : - la figure 3 cst une vue de côté du mem tourne-disque lorsque l'slimentation est coupée ; - la figure 4 est un diagramme ; - la figure 5 représente une variante entierement électronique. 



   Dans une premiere léalisation, on utilise des moyens mécaniques et électroniques. D'une maniere   gene-   rale, une mémoire électronique aaure la   memorisation   des informations relatives au disque lesquelles   sontsituees   à   1a périphérie   interne de celui-ci. Ces informations comprennent entre autres le nombre total de morceaux portés par le disque, la gamme de vitesse, etc... 



   Lorsqu'un disque est introduit dans l'appareil, un interruteur actionné par le dispositif de mise en position operative dudit disque assure le décodage desdites informations et leur stockage dans une mémoire non volatile du type à effacement (EEPROM). 



   Ainsi, ces informations sont   nenorisces, r..   en l'absence de tensioi. ou courant, et ce aussi longtenps que le disque est en position operative. 



   Des que ce dernier est amené en postion inopérative, l'interrupteur est ac : ionn6 et dans cette autre position, il assure l'effacement des donnees memorisées dans la mémoire non volatile (EEPROM). 



   Sur les   figures 1     3, on a représenté en 10 1t châssis d'un appareil sur lequel sont montés les moyens d'entraînement 12 du disque 11 comprenant principalement un moteur 14 munit d'un plateur d'entraînement 16. 



   L'équipage 20 de lecture   ets'ou   d'enregistrement mobile du laser   2 : est constitu ! J'un   levier 24 monté en rotation autour d'un aye 26 fixé au châssis 10. 
 EMI2.1 
 



  4 .'son extremité opposee cell ? où se trouve 

 <Desc/Clms Page number 3> 

 le laser 22, le levier 24 porte une masse d'équilibrage   28.   



   Sous le chässis 10 est prévu un dispositif de blocage de l'Equipage mobile comprenant une plaquette y pivotante 40 munie d'une garniture 44 en un matériau souple, caoutchouc par exemple, qui est   reli6e     ä   ! es extrémités par des bras 41 ä des axes   42 portes   par le châssis10. 



   Cette plaquette 40 est soumise ä l'action d'un ressort 46 qui est fixé d'une part au châssis 10 et d'autre part   ä   la plaquette 40 et qui tend ä pousser constamment la plaquette contre l'equipage mobile 20 du laser. 



     Conformément a   l'invention, la plaquette 40 porte une languette ou saillie 48 destinée à coopérer avec un electro-aimant 52 fixé au châssis 10. 



   Dans ces conditions, lorsque le tourne-disque est sous tension, l'electro-aimant 52 attire ia plaquette 40   a   l'encontre de l'action du ressort 46, ce qui permet le libre mouvement de l'equipage 20 da laser en assura la lecture et la reproduction des   informations portccs   par le disque. 



   Das que l'alimentation du tourne-disque est interrompue, l'électro-aimant   52   cesse d'attirer la languette 48 et celle-ci est poussée cortre l'équipage 24 du laser de sorte que celui-ci est   immobilisé   dans la position qu'il occupait au moment Je cette interruption. 



   La figure 4 montre un diagramme dans lequel les bloes représentent respectivement :   - où :   le clavier de commande et d'affichage ; le microprocesseur réalisant le contrôle du système de lecture, l'asservissement de la méca- nique de chargement du disque et la programma-   tic des plages choisies   ; 

 <Desc/Clms Page number 4> 

 - 75 : une mémoire non volatile du type ä effacement (EEPROM) - 80 : la mécanique de lecture du disque - 85   : la mecanique   de chargement ou de mise en position operative du disque avec l'interrupteur 86 de 
 EMI4.1 
 sortie du disque pouvant agir sur l'électroaimant S2 ; - 90 : 1'électronique de traitement du signal laser. 



   La figure 5 représente le meme diagramme (sauf l'electro-aimant 2) dans une réalisation entièrement électronique. Dans ce cas, les informations de début de disque et de la position du système de lecture 
 EMI4.2 
 sont mises en mGmoire avant l'arret du disque de maniere ä reprendre la lecture du même disque la position ob elle a été interrompue. 



  L'interrupteur 86 de sortie du disque contr5 : le maintien ou l'effacement des données en   moire.   



   Ces données sont effacées lorsque le disque est sortie de l'appareil et elles sont maintenues aussi longtemps que le disque se trouve en   position oper@   dans l'appareil. 
 EMI4.3 
 



  Dans ce mode de réalisation entiercmenc e !. c : :'jnique, on asure donc en plus de la mémorisant on des informations propres au disque, celle de la position de l'equipage mobile du laser. Ceci est assuré en mémorisant par exemple le numéro du morceau dont le laser assurait la detection et la reproduction des informations, ou mieux encore, en plus du morceau, la position exacte (en minutes et secondes) de l'interruption de reproduction puisqu'à tout moment, dans las tourne-disques pour Disques Ccmpacts, on connalt par lecture d'un codage   specifiqu,     la position exicte,   en temps, de l'information lue et reproduite. 
 EMI4.4 
 



  Eventuellement la memoire peut etre d bulles mag : 1étiues. 

 <Desc/Clms Page number 5> 

 



   D'autres modes de réalisation peuvent bien entendu Stre utilisés sans pour autant sortir du cadre de l'invention.



   <Desc / Clms Page number 1>
 
 EMI1.1
 



  The present invention relates to record players. more specifically, these <$ dan $ vehicles are specifically concerned with those with optical reading (laser beam).



   When a disc is played in such a device as soon as the operation of the vehicle is interrupted,
 EMI1.2
 the device is switched off so that the next time it is used, the reading of the information carried by the disc with a view to its reproduction begins again at the very beginning of it. yes, this phenomenon is particularly unpleasant because with cassette players or other means of reproduction, the user is used to the fact that the reading of the information carried by the support, resumes very exactly at the place where it was interrupted.



   The purpose of the invention is to overcome this drawback and to allow, with simple, inexpensive and reliable design means, to resume
 EMI1.3
 In the case of disk, playback where it was stopped.



  In order to achieve this goal, the device object of the invention is? ssentialent characteristic in that at the disc-urn are associated with mechanical, electrical or electronic Deans ensuring the memorization of information relating to a disc (such as: coding of the different pieces, titles, rotation speed, ...) positioned in said record player and the place where the reproduction of information has been interrupted and this has been the case for a long time as said disc is not removed, either manually or automatically.



   In order to clearly understand the invention, two moles of nonlimiting embodiments will be described below with reference to the drawings in which: - Figure 1 is a partial top view of a record player in which only represents the

 <Desc / Clms Page number 2>

 elements necessary for understanding the invention; - Figure 2 is a side view of said record player in its operative position: - Figure 3 is a side view of the same record player when the power is turned off; - Figure 4 is a diagram; - Figure 5 shows a fully electronic variant.



   In a first embodiment, mechanical and electronic means are used. In general, an electronic memory stores the information relating to the disc which is located on the internal periphery of the latter. This information includes among other things the total number of songs carried by the disc, the speed range, etc.



   When a disc is inserted into the device, a switch actuated by the device for putting the disc into operative position ensures the decoding of said information and its storage in a non-volatile erasure type memory (EEPROM).



   Thus, this information is nenorisces, r .. in the absence of tensioi. or current, and this as long as the disc is in the operative position.



   As soon as the latter is brought into the inoperative position, the switch is activated: and in this other position, it erases the data stored in the non-volatile memory (EEPROM).



   In FIGS. 1 3, there is shown at 10 1t the chassis of an apparatus on which the drive means 12 of the disc 11 are mounted, mainly comprising a motor 14 provided with a drive plator 16.



   The crew 20 for reading and / or mobile recording of the laser 2: is constituted! I a lever 24 rotatably mounted around an aye 26 fixed to the chassis 10.
 EMI2.1
 



  4. its extremity opposite cell? where is

 <Desc / Clms Page number 3>

 the laser 22, the lever 24 carries a balancing mass 28.



   Under the chassis 10 is provided a blocking device for the moving element comprising a pivoting plate 40 provided with a lining 44 made of a flexible material, rubber for example, which is connected to! the ends by arms 41 to axes 42 carried by the chassis 10.



   This plate 40 is subjected to the action of a spring 46 which is fixed on the one hand to the chassis 10 and on the other hand to the plate 40 and which tends to constantly push the plate against the moving element 20 of the laser.



     According to the invention, the plate 40 carries a tongue or projection 48 intended to cooperate with an electromagnet 52 fixed to the chassis 10.



   Under these conditions, when the turntable is energized, the electromagnet 52 attracts the wafer 40 against the action of the spring 46, which allows the free movement of the crew 20 da laser ensuring reading and reproduction of information portccs by the disc.



   As soon as the power supply to the turntable is interrupted, the electromagnet 52 ceases to attract the tongue 48 and the latter is pushed against the crew 24 of the laser so that the latter is immobilized in the position that 'he occupied at the time I this interruption.



   Figure 4 shows a diagram in which the bloes represent respectively: - where: the command and display keyboard; the microprocessor carrying out the control of the reading system, the slaving of the disc loading mechanism and the programming of the selected tracks;

 <Desc / Clms Page number 4>

 - 75: a non-volatile erasure type memory (EEPROM) - 80: the mechanics of reading the disc - 85: the mechanism for loading or putting the disc into operational position with the switch 86
 EMI4.1
 disc outlet capable of acting on the electromagnet S2; - 90: the laser signal processing electronics.



   FIG. 5 represents the same diagram (except the electromagnet 2) in an entirely electronic embodiment. In this case, the disc start information and the position of the playback system
 EMI4.2
 are put in memory before stopping the disc so as to resume playing the same disc in the position where it was interrupted.



  The disc output switch 86 contr5: maintaining or erasing data in memory.



   These data are erased when the disc is removed from the device and they are maintained as long as the disc is in the oper @ position in the device.
 EMI4.3
 



  In this embodiment entirely cmenc e!. c:: 'jnique, we thus ensure in addition to memorizing on information specific to the disc, that of the position of the moving part of the laser. This is ensured by memorizing for example the number of the piece whose laser ensured the detection and the reproduction of information, or better still, in addition to the piece, the exact position (in minutes and seconds) of the interruption of reproduction since at at any time, in the disc players for Compact Discs, we know by reading a specific coding, the exact position, in time, of the information read and reproduced.
 EMI4.4
 



  Possibly the memory can be of magic bubbles: 1etiues.

 <Desc / Clms Page number 5>

 



   Other embodiments can of course be used without departing from the scope of the invention.


    

Claims (8)

EMI6.1  EMI6.1   REVENDICATIONS 1. Tourne-disque, spcialenent 3 lecture -. optique (rayon laser)et particulibreoenf. poM* vhculos automooiles, caractfrisF en cc qu'$i coxporte u e ositif en vue de roprendre, suito a une coupute d'tientation, la reproductinn des informations à l'endroit < o & celle-ci a été interrompue et : en ce que, à cet effet, au tourne-disque, sont associés des moyens mécanique électriques et/ou éectroniques assurant la mémorisation des informations relatives à un disque (codage, titres, vitesses de fotation, ... positionn@ dans ledit tournedisque et l'endroit où la reproduction des informations a été interrompue, et cela aussi longtemps que ledit disque n'est pas retiré, soit manuellement, soit automatiquement. CLAIMS 1. Turntable, special 3 reading -. optical (laser beam) and particulibreoenf. poM * vhculos automooiles, caractfisF en cc that $ i coxport ue ositif with a view to resuming, following a direction break, the reproduction of information at the place <where this was interrupted and: in that , for this purpose, to the record player, are associated mechanical electrical and / or electronic means ensuring the memorization of the information relating to a disc (coding, titles, rotation speeds, ... positioned @ said record player and the place where the reproduction of information has been interrupted, and this as long as said disc is not removed, either manually or automatically. 2. Dispositif selon la revendication 1, caracterisé en ce qu'il est constitué d'une part, d'une mémaire électrique ou électronique assurant la mémorisation des informations relatives au disque et d'autre part, moyens mécaniques bloquant l'assemblage mobile du laser 3 l'endroit où la lecture des informations portées p@ le disque a été interrompue.  2. Device according to claim 1, characterized in that it consists on the one hand, of an electrical or electronic memory ensuring the storage of information relating to the disc and on the other hand, mechanical means blocking the movable assembly of the laser 3 the place where the reading of the information carried p @ the disc was interrupted. 3. Dispositif selon la revendication l,caractérisé en ce qu'il est constitue d'une mémoire electronique assurant la mémorisation des infoTation5 relatives au disque et de la position d'interruption de la reproduction des informations portees oar le disque.  3. Device according to claim l, characterized in that it consists of an electronic memory ensuring the memorization of infoTation5 relating to the disc and of the position of interruption of the reproduction of the information carried on the disc. 4. Dispositif selon l'une quelconque des EMI6.2 revendica : ions p.-c. dentes, caracterise en ce que la mémoire est du type non volatila.  4. Device according to any one of  EMI6.2  claims: ions p.-c. dentes, characterized in that the memory is of the nonvolatile type. 5. Dispositif selon l'uie quelccnque des revendicatious 3 4, caracteris6 en : e que 1a mémoire est dt ! type à eff3cement et ecrit'tre electrique (EEPROM). 5. Device according to any of the claims 3 to 4, characterized in that the memory is dt! type with electrical effraction and writing (EEPROM). 6. Dispositif selon l'Lne quelconque des revendications à 4, caractérisé en ce que la mémoire <Desc/Clms Page number 7> EMI7.1 est du type bulles magnetiques.  6. Device according to any one of claims 4, characterized in that the memory  <Desc / Clms Page number 7>    EMI7.1  is of the magnetic bubble type. 7. Dispositif selon l'une quelconque des revendicitions préce-lentes, caractérisé en ce que le contenu desdites memoires est effacé aussitsst que le disque placé dans l'appareil en est retiré manuellement ou autcmatiquement.  7. Device according to any one of the preceding claims, characterized in that the content of said memories is erased as soon as the disc placed in the device is removed manually or automatically. 8. Dispositif suivant la revendicztion 2, cara, térisé en ce que le dispositif de blocage de l'equipage du laser comprend une plaquette pivotante (40¯ soumise à l'action d'un ressort (46) et avec laquelle coopère un électro-aimant (52) de teile manier ? que lorsque le tourne-disque est sous tension, l'électroaimant (52 attire la plaquette en pprett3nt 1a leLture et la reproduction des informations portées par le disque tandis que lorsque l'alimentation est interrompez l'immobilisation de l'équipage est assurée dans la position qu'il occupait au moment de cette interruption.  8. Device according to claim 2, cara, terized in that the device for blocking the laser crew comprises a pivoting plate (40¯ subjected to the action of a spring (46) and with which an electro- such magnet (52) so that when the turntable is on, the electromagnet (52 attracts the wafer by pprett3nt 1a lLture and reproduction of information carried by the disc while when the power is interrupted immobilization of the crew is ensured in the position they occupied at the time of this interruption.
BE0/211088A 1983-06-30 1983-06-30 Optical recording-reproducing appts. for motor vehicle - uses EEPROM to lock laser read head at present position when power supply is interrupted BE897174A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE0/211088A BE897174A (en) 1983-06-30 1983-06-30 Optical recording-reproducing appts. for motor vehicle - uses EEPROM to lock laser read head at present position when power supply is interrupted
US06/608,878 US4527265A (en) 1983-06-30 1984-05-10 Position memory for laser reproduction unit
NL8402018A NL190793C (en) 1983-06-30 1984-06-26 Information plate playback device.
IT21638/84A IT1196169B (en) 1983-06-30 1984-06-28 POSITION MEMORY FOR LASER BAND SOURCE GROUP
CH3118/84A CH657931A5 (en) 1983-06-30 1984-06-28 OPTICALLY READING RECORDER.
DE19843423887 DE3423887A1 (en) 1983-06-30 1984-06-28 TURNTABLE
JP59133397A JPS6028081A (en) 1983-06-30 1984-06-29 Record disc player

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE897174 1983-06-30
BE0/211088A BE897174A (en) 1983-06-30 1983-06-30 Optical recording-reproducing appts. for motor vehicle - uses EEPROM to lock laser read head at present position when power supply is interrupted

Publications (1)

Publication Number Publication Date
BE897174A true BE897174A (en) 1983-10-17

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Country Link
BE (1) BE897174A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200706A3 (en) * 1985-04-30 1988-10-05 Staar Societe Anonyme Control system for record changer apparatus
WO1988009993A1 (en) * 1987-06-09 1988-12-15 Deutsche Thomson-Brandt Gmbh Compact disk reader
EP0363056A3 (en) * 1988-10-04 1991-01-23 Pioneer Electronic Corporation Compact disk player

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200706A3 (en) * 1985-04-30 1988-10-05 Staar Societe Anonyme Control system for record changer apparatus
WO1988009993A1 (en) * 1987-06-09 1988-12-15 Deutsche Thomson-Brandt Gmbh Compact disk reader
EP0363056A3 (en) * 1988-10-04 1991-01-23 Pioneer Electronic Corporation Compact disk player

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RE20 Patent expired

Owner name: S.A. *STAAR

Effective date: 20030630