CA1048668A - Automatic display segment intensity control - Google Patents

Automatic display segment intensity control

Info

Publication number
CA1048668A
CA1048668A CA75242541A CA242541A CA1048668A CA 1048668 A CA1048668 A CA 1048668A CA 75242541 A CA75242541 A CA 75242541A CA 242541 A CA242541 A CA 242541A CA 1048668 A CA1048668 A CA 1048668A
Authority
CA
Canada
Prior art keywords
segments
light
emitting
emitting diode
power
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
CA75242541A
Other languages
English (en)
French (fr)
Inventor
David S. Cochran
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Application granted granted Critical
Publication of CA1048668A publication Critical patent/CA1048668A/en
Expired 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
    • 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)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
CA75242541A 1974-12-23 1975-12-22 Automatic display segment intensity control Expired CA1048668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/535,311 US3986186A (en) 1974-12-23 1974-12-23 Automatic display segment intensity control

Publications (1)

Publication Number Publication Date
CA1048668A true CA1048668A (en) 1979-02-13

Family

ID=24133646

Family Applications (1)

Application Number Title Priority Date Filing Date
CA75242541A Expired CA1048668A (en) 1974-12-23 1975-12-22 Automatic display segment intensity control

Country Status (4)

Country Link
US (1) US3986186A (enExample)
JP (1) JPS595893Y2 (enExample)
CA (1) CA1048668A (enExample)
GB (1) GB1525949A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099171A (en) * 1977-01-28 1978-07-04 National Semiconductor Corporation Brightness control in an LED display device
US4314245A (en) * 1980-03-10 1982-02-02 Wilbur Jr John R Video compensation subcircuit
DE3036737C2 (de) * 1980-09-29 1986-10-23 Tandberg Data A/S, Oslo Anordnung zum Erzeugen eines Lichtstärkesteuersignals für einen Videoverstärker eines Datensichtgerätes
US4441106A (en) * 1982-06-04 1984-04-03 Northern Telecom Limited Electrical display apparatus with reduced peak power consumption
US4524457A (en) * 1984-04-30 1985-06-18 Marino Technologies, Inc. Cargo bag with reinforced triangular lifting panels
US4825201A (en) * 1985-10-01 1989-04-25 Mitsubishi Denki Kabushiki Kaisha Display device with panels compared to form correction signals
US5644328A (en) * 1995-03-03 1997-07-01 Motorola Apparatus and method for operating groups of led display pixels in parallel to maximize active time
US6693394B1 (en) 2002-01-25 2004-02-17 Yazaki North America, Inc. Brightness compensation for LED lighting based on ambient temperature

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721084A (en) * 1971-08-03 1973-03-20 Hamilton Watch Co Solid state watch incorporating large-scale integrated circuits
JPS4984194A (enExample) * 1972-12-15 1974-08-13
JPS5315773B2 (enExample) * 1973-07-05 1978-05-27

Also Published As

Publication number Publication date
GB1525949A (en) 1978-09-27
US3986186A (en) 1976-10-12
JPS5181631U (enExample) 1976-06-30
JPS595893Y2 (ja) 1984-02-22

Similar Documents

Publication Publication Date Title
KR101493492B1 (ko) 백라이트 유닛, 이를 포함하는 액정 표시 장치 및 이의구동방법
US4845481A (en) Continuously variable color display device
US20030043090A1 (en) Apparatus and method for driving luminescent display panel
GB2346004A (en) Light emitting display device with current control
JP2005157394A (ja) バックライト駆動回路
CA1048668A (en) Automatic display segment intensity control
WO1996005589A1 (en) A system and method for achieving uniform screen brightness within a matrix display
CN218122410U (zh) 背光模组和显示装置
JP2941704B2 (ja) 発光素子の駆動回路
JP2003131619A (ja) 自己発光型表示装置
EP3340218B1 (en) Display apparatus
JPH01277889A (ja) 蛍光表示装置
US11538425B2 (en) Display device
JP2574853Y2 (ja) Ｌｅｄ駆動回路
JP2605874Y2 (ja) マルチチップｌｅｄ
US4857900A (en) Display device with color correction
JP2527707B2 (ja) 表示装置
US12387658B2 (en) Display dimming for pulse-width-modulation pixel control
KR910003141B1 (ko) 형광 표시장치의 불밝기 수동 조절회로
JP2527708B2 (ja) 表示装置
JP2002023666A (ja) 電光表示装置
JPH03237484A (ja) 多桁型７セグメント式ｌｅｄ数字表示装置
KR19990030880U (ko) 유기 이엘 장치의 구동회로
CN116312337A (zh) 显示器用发光设备及其控制方法
JPH0230925Y2 (enExample)