GB1526091A - Display apparatus - Google Patents

Display apparatus

Info

Publication number
GB1526091A
GB1526091A GB729075A GB729075A GB1526091A GB 1526091 A GB1526091 A GB 1526091A GB 729075 A GB729075 A GB 729075A GB 729075 A GB729075 A GB 729075A GB 1526091 A GB1526091 A GB 1526091A
Authority
GB
United Kingdom
Prior art keywords
bits
gate
output
light pen
bit
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
GB729075A
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.)
Data Recording Instrument Co Ltd
Original Assignee
Data Recording Instrument Co Ltd
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 Data Recording Instrument Co Ltd filed Critical Data Recording Instrument Co Ltd
Priority to GB729075A priority Critical patent/GB1526091A/en
Priority to US05/658,723 priority patent/US4141000A/en
Priority to JP51017841A priority patent/JPS51108733A/ja
Priority to NL7601781A priority patent/NL7601781A/en
Publication of GB1526091A publication Critical patent/GB1526091A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/038Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
    • G06F3/0386Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry for light pen

Abstract

1526091 Control of displays DATA RECORDING INSTRUMENT CO Ltd 19 Feb 1976 [21 Feb 1975 (2)] 7290/75 and 7298/75 Heading G4H An interactive display comprises an array of discrete display elements 300 each producing an optical output in response to a drive input, labelling giving each element an independent significance, means 101 for storing a plurality of bits each associated with a different element 300, means 140, &c. responsive to the values of the stored bits for generating and supplying to each element as its drive input either a first or a second time-varying waveform, depending on the value of the stored bit, to cause the element to be in first or second visually distinct display states, both waveforms containing a signal identifying that element by its timing, sensing means 70 movable by an operator over the array to sense light from a selected element, and means 202 responsive to means 70 and capable of inverting the value of the associated bit. Elements 300 are LEDs (they may be liquid crystals) and means 70 is a phototransistor in a light pen 60. Means 101 is a recirculating shift register storing a 1(0) if the corresponding element is to be on (off), e.g. b, Fig. 3. The bits in register 101 are normally recirculated via gating circuit 202, Fig. 5, under the control of an oscillator 150 whose pulses a also control row and column addressing circuitry 170-280 and a pulse generator 160 whose output c is combined with the shift register output b in OR gate 140 to give an enabling pulse train 250 (e.g. d) containing long and short pulses for elements which are to be on and off respectively. To change the state of an element, a bistable 100 is set in the appropriate state and light pen 60 is placed on the diode. The light pen output blocks gate 450 at the appropriate moment so that a pulse is added to or removed from the circulated pulse train 30 via gate 430. In a second embodiment (Fig. 6, not shown) the arrangement of Fig. 2 is modified to cope with displays having large numbers of diodes by introducing extra energizing pulses in the waveform applied to each bit diode. The labelling of the diodes is effected by means of an interchangeable partially transparent cardboard overlay (Figs. 8 and 9, not shown) which enables the display to be used with a mini-computer for information retrieval from microfilm or a disc file.
GB729075A 1975-02-21 1975-02-21 Display apparatus Expired GB1526091A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB729075A GB1526091A (en) 1975-02-21 1975-02-21 Display apparatus
US05/658,723 US4141000A (en) 1975-02-21 1976-02-17 Interactive displays comprising a plurality of individual display elements
JP51017841A JPS51108733A (en) 1975-02-21 1976-02-20
NL7601781A NL7601781A (en) 1975-02-21 1976-02-20 Reproduction unit with separate visual display elements - has detector identifying energy emitted by selected elements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB729075A GB1526091A (en) 1975-02-21 1975-02-21 Display apparatus

Publications (1)

Publication Number Publication Date
GB1526091A true GB1526091A (en) 1978-09-27

Family

ID=9830274

Family Applications (1)

Application Number Title Priority Date Filing Date
GB729075A Expired GB1526091A (en) 1975-02-21 1975-02-21 Display apparatus

Country Status (1)

Country Link
GB (1) GB1526091A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509046A (en) * 1981-07-30 1985-04-02 Dainippon Screen Mfg. Co., Ltd. Indicating method and apparatus for digitizer menu portions
GB2149542A (en) * 1983-10-25 1985-06-12 Agb Research Plc A data recording system
GB2155674A (en) * 1984-01-31 1985-09-25 Canon Kk Information processing apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509046A (en) * 1981-07-30 1985-04-02 Dainippon Screen Mfg. Co., Ltd. Indicating method and apparatus for digitizer menu portions
GB2149542A (en) * 1983-10-25 1985-06-12 Agb Research Plc A data recording system
GB2155674A (en) * 1984-01-31 1985-09-25 Canon Kk Information processing apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee