IT1047617B - Perfezionamento nei piccoli calcolatori portatili - Google Patents

Perfezionamento nei piccoli calcolatori portatili

Info

Publication number
IT1047617B
IT1047617B IT51549/75A IT5154975A IT1047617B IT 1047617 B IT1047617 B IT 1047617B IT 51549/75 A IT51549/75 A IT 51549/75A IT 5154975 A IT5154975 A IT 5154975A IT 1047617 B IT1047617 B IT 1047617B
Authority
IT
Italy
Prior art keywords
improvement
portable computers
small portable
small
computers
Prior art date
Application number
IT51549/75A
Other languages
English (en)
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Application granted granted Critical
Publication of IT1047617B publication Critical patent/IT1047617B/it

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/24—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the field-effect type only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Led Devices (AREA)
IT51549/75A 1974-09-30 1975-09-29 Perfezionamento nei piccoli calcolatori portatili IT1047617B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US510254A US3925690A (en) 1974-09-30 1974-09-30 Direct drive circuit for light emitting diodes

Publications (1)

Publication Number Publication Date
IT1047617B true IT1047617B (it) 1980-10-20

Family

ID=24029982

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51549/75A IT1047617B (it) 1974-09-30 1975-09-29 Perfezionamento nei piccoli calcolatori portatili

Country Status (7)

Country Link
US (1) US3925690A (it)
JP (1) JPS544210B2 (it)
CA (1) CA1042521A (it)
DE (1) DE2543244A1 (it)
FR (1) FR2286432A1 (it)
GB (1) GB1490146A (it)
IT (1) IT1047617B (it)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451237C2 (de) * 1974-10-29 1985-10-10 Texas Instruments Deutschland Gmbh, 8050 Freising Schaltungsanordnung zum Ansteuern einer mehrere Anzeigesegmente enthaltenden, der Anzeige verschiedener Zeichen dienenden Anzeigevorrichtung
JPS51117669A (en) * 1975-03-18 1976-10-15 Top Electronics Inc Electronic clock
US4072937A (en) * 1976-01-15 1978-02-07 Bell Telephone Laboratories, Incorporated MOS transistor driver circuits for plasma panels and similar matrix display devices
US4048632A (en) * 1976-03-05 1977-09-13 Rockwell International Corporation Drive circuit for a display
US4099171A (en) * 1977-01-28 1978-07-04 National Semiconductor Corporation Brightness control in an LED display device
US4224532A (en) * 1977-08-03 1980-09-23 Rockwell International Corporation One chip direct drive and keyboard sensing arrangement for light emitting diode and digitron displays
US4160934A (en) * 1977-08-11 1979-07-10 Bell Telephone Laboratories, Incorporated Current control circuit for light emitting diode
DE2838171C2 (de) * 1978-09-01 1986-04-17 Telefunken electronic GmbH, 7100 Heilbronn Konstantstrom-Schalter
JPS5677891A (en) * 1979-11-29 1981-06-26 Tokyo Shibaura Electric Co Displayyunit drive circuit
JPS583053A (ja) * 1981-06-30 1983-01-08 Toshiba Corp 電子装置の入出力信号制御方式
DE3146327A1 (de) * 1981-11-23 1983-06-01 Siemens AG, 1000 Berlin und 8000 München Leuchtdiodenvorrichtung mit strombegrenzungseinrichtung und signalwandler
JPS5967723A (ja) * 1982-09-27 1984-04-17 Seiko Instr & Electronics Ltd 半導体装置
FR2563648B1 (fr) * 1984-04-26 1990-06-01 Poitiers Universite Dispositif de signalisation ou d'affichage permettant de visualiser au moins un message alphanumerique et/ou graphique, et diode electroluminescente pour un tel dispositif
US4654629A (en) * 1985-07-02 1987-03-31 Pulse Electronics, Inc. Vehicle marker light
FR2741742B1 (fr) * 1995-11-27 1998-02-13 Sgs Thomson Microelectronics Circuit de commande de diodes electroluminescentes
US6628252B2 (en) * 2000-05-12 2003-09-30 Rohm Co., Ltd. LED drive circuit
US6697130B2 (en) 2001-01-16 2004-02-24 Visteon Global Technologies, Inc. Flexible led backlighting circuit
US6930737B2 (en) 2001-01-16 2005-08-16 Visteon Global Technologies, Inc. LED backlighting system
US7262752B2 (en) * 2001-01-16 2007-08-28 Visteon Global Technologies, Inc. Series led backlight control circuit
US6717559B2 (en) 2001-01-16 2004-04-06 Visteon Global Technologies, Inc. Temperature compensated parallel LED drive circuit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3388292A (en) * 1966-02-15 1968-06-11 Rca Corp Insulated gate field-effect transistor means for information gating and driving of solid state display panels
US3745072A (en) * 1970-04-07 1973-07-10 Rca Corp Semiconductor device fabrication
US3693060A (en) * 1971-04-13 1972-09-19 Philips Corp Solid-state relay using light-emitting diodes
FR2139870B1 (it) * 1971-05-29 1977-09-30 Ver Flugtechnische Werke
US3705316A (en) * 1971-12-27 1972-12-05 Nasa Temperature compensated light source using a light emitting diode
US3770967A (en) * 1972-02-24 1973-11-06 Ibm Field effect transistor detector amplifier cell and circuit providing a digital output and/or independent of background
US3784844A (en) * 1972-12-27 1974-01-08 Rca Corp Constant current circuit
JPS5067035A (it) * 1973-10-12 1975-06-05
DK138576A (da) * 1975-04-07 1976-10-08 Texas Instruments Inc Desplay med segmentskandering og fremgangsmade til segmentskandering i en sadan display

Also Published As

Publication number Publication date
CA1042521A (en) 1978-11-14
DE2543244A1 (de) 1976-06-10
JPS5160420A (it) 1976-05-26
FR2286432A1 (fr) 1976-04-23
FR2286432B1 (it) 1981-01-09
JPS544210B2 (it) 1979-03-03
US3925690A (en) 1975-12-09
GB1490146A (en) 1977-10-26

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19940928