GB2233086B - Apparatus and method for optical encoding - Google Patents

Apparatus and method for optical encoding

Info

Publication number
GB2233086B
GB2233086B GB9010747A GB9010747A GB2233086B GB 2233086 B GB2233086 B GB 2233086B GB 9010747 A GB9010747 A GB 9010747A GB 9010747 A GB9010747 A GB 9010747A GB 2233086 B GB2233086 B GB 2233086B
Authority
GB
United Kingdom
Prior art keywords
optical encoding
encoding
optical
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 - Fee Related
Application number
GB9010747A
Other versions
GB2233086A (en
GB9010747D0 (en
Inventor
Paul M Donovan
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.)
Apple Inc
Original Assignee
Apple Computer Inc
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 Apple Computer Inc filed Critical Apple Computer Inc
Publication of GB9010747D0 publication Critical patent/GB9010747D0/en
Publication of GB2233086A publication Critical patent/GB2233086A/en
Application granted granted Critical
Publication of GB2233086B publication Critical patent/GB2233086B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/28—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding
    • H03M1/30—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06F3/0312—Detection arrangements using opto-electronic means for tracking the rotation of a spherical or circular member, e.g. optical rotary encoders used in mice or trackballs using a tracking ball or in mouse scroll wheels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/002—Provisions or arrangements for saving power, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains or by selectively turning on stages when needed

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Optical Transform (AREA)
  • Analogue/Digital Conversion (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
GB9010747A 1989-05-24 1990-05-14 Apparatus and method for optical encoding Expired - Fee Related GB2233086B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35741989A 1989-05-24 1989-05-24

Publications (3)

Publication Number Publication Date
GB9010747D0 GB9010747D0 (en) 1990-07-04
GB2233086A GB2233086A (en) 1991-01-02
GB2233086B true GB2233086B (en) 1993-10-13

Family

ID=23405512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9010747A Expired - Fee Related GB2233086B (en) 1989-05-24 1990-05-14 Apparatus and method for optical encoding

Country Status (5)

Country Link
JP (1) JPH03102215A (en)
AU (1) AU624508B2 (en)
CA (1) CA2017486A1 (en)
DE (1) DE4015913A1 (en)
GB (1) GB2233086B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4042302A1 (en) * 1990-12-31 1992-07-09 Bodenseewerk Geraetetech Switch position sensor - measures position of switchable, control component and incorporates optical transmitter fed with different frequencies
US5359348A (en) * 1992-05-21 1994-10-25 Selectech, Ltd. Pointing device having improved automatic gain control and information reporting
JP2806198B2 (en) * 1993-03-30 1998-09-30 三菱電機株式会社 Encoder device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2185812B (en) * 1985-08-27 1989-08-09 Peter Howard Jackson Optical reading device

Also Published As

Publication number Publication date
GB2233086A (en) 1991-01-02
AU5578990A (en) 1990-11-29
CA2017486A1 (en) 1990-11-24
GB9010747D0 (en) 1990-07-04
JPH03102215A (en) 1991-04-26
AU624508B2 (en) 1992-06-11
DE4015913A1 (en) 1990-11-29

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Legal Events

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

Effective date: 19970514