EP0238113A3 - Data display - Google Patents

Data display Download PDF

Info

Publication number
EP0238113A3
EP0238113A3 EP19870200221 EP87200221A EP0238113A3 EP 0238113 A3 EP0238113 A3 EP 0238113A3 EP 19870200221 EP19870200221 EP 19870200221 EP 87200221 A EP87200221 A EP 87200221A EP 0238113 A3 EP0238113 A3 EP 0238113A3
Authority
EP
European Patent Office
Prior art keywords
display
data
bit
memory
character
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.)
Granted
Application number
EP19870200221
Other languages
German (de)
French (fr)
Other versions
EP0238113A2 (en
EP0238113B1 (en
Inventor
David Edward Penna
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.)
Philips Electronics UK Ltd
Koninklijke Philips NV
Original Assignee
Philips Electronic and Associated Industries Ltd
Philips Electronics UK Ltd
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Philips Electronic and Associated Industries Ltd, Philips Electronics UK Ltd, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Philips Electronic and Associated Industries Ltd
Publication of EP0238113A2 publication Critical patent/EP0238113A2/en
Publication of EP0238113A3 publication Critical patent/EP0238113A3/en
Application granted granted Critical
Publication of EP0238113B1 publication Critical patent/EP0238113B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/24—Generation of individual character patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Digital Computer Display Output (AREA)

Abstract

A logic processor-controlled data display apparatus having a display memory in which pixel data representing text for display is stored in bit-map form. The pixel data is produced for each display from character data stored in a background memory. When the character data is stored in bit-map form it can be read directly from the background memory bit-by-bit and written into the display memory as the pixel data. However, this process takes a large number of programme steps, so that the transfer of the data is relatively slow. The present invention provides for the storage in the background memory of character data in the form of machine code sub-routines. The sub-routine for a character contains instructions for identifying the shape-defining pixels (dots) of the character relative to a base dot position and the sub-routine is run to write these pixels into the display memory following location of the base dot position in the display memory. Figures 2 and 4 exemplify the invention.
EP19870200221 1986-02-17 1987-02-12 Data display Expired - Lifetime EP0238113B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8603850 1986-02-17
GB08603850A GB2186766A (en) 1986-02-17 1986-02-17 Character display apparatus

Publications (3)

Publication Number Publication Date
EP0238113A2 EP0238113A2 (en) 1987-09-23
EP0238113A3 true EP0238113A3 (en) 1991-07-17
EP0238113B1 EP0238113B1 (en) 1994-11-23

Family

ID=10593182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870200221 Expired - Lifetime EP0238113B1 (en) 1986-02-17 1987-02-12 Data display

Country Status (4)

Country Link
EP (1) EP0238113B1 (en)
JP (1) JPH083704B2 (en)
DE (1) DE3750766T2 (en)
GB (1) GB2186766A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110675800A (en) * 2019-11-07 2020-01-10 广东乐心医疗电子股份有限公司 Display screen driving method and device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2007413A (en) * 1977-10-31 1979-05-16 Diab K M Processing Arabic-Farsi languages

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2007413A (en) * 1977-10-31 1979-05-16 Diab K M Processing Arabic-Farsi languages

Also Published As

Publication number Publication date
GB8603850D0 (en) 1986-03-26
GB2186766A (en) 1987-08-19
EP0238113A2 (en) 1987-09-23
JPH083704B2 (en) 1996-01-17
DE3750766D1 (en) 1995-01-05
JPS62249188A (en) 1987-10-30
DE3750766T2 (en) 1995-06-22
EP0238113B1 (en) 1994-11-23

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