GB2006944B - Electret devices and illuminated indicator systems incorporating them - Google Patents

Electret devices and illuminated indicator systems incorporating them

Info

Publication number
GB2006944B
GB2006944B GB7835499A GB7835499A GB2006944B GB 2006944 B GB2006944 B GB 2006944B GB 7835499 A GB7835499 A GB 7835499A GB 7835499 A GB7835499 A GB 7835499A GB 2006944 B GB2006944 B GB 2006944B
Authority
GB
United Kingdom
Prior art keywords
systems incorporating
indicator systems
illuminated indicator
electret devices
electret
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
GB7835499A
Other languages
English (en)
Other versions
GB2006944A (en
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB2006944A publication Critical patent/GB2006944A/en
Application granted granted Critical
Publication of GB2006944B publication Critical patent/GB2006944B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F13/0472—Traffic signs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/372—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the positions of the elements being controlled by the application of an electric field

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Road Signs Or Road Markings (AREA)
GB7835499A 1977-09-02 1978-09-04 Electret devices and illuminated indicator systems incorporating them Expired GB2006944B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7726693A FR2402220A1 (fr) 1977-09-02 1977-09-02 Dispositif a electrets et systeme d'affichage lumineux comprenant un tel dispositif

Publications (2)

Publication Number Publication Date
GB2006944A GB2006944A (en) 1979-05-10
GB2006944B true GB2006944B (en) 1982-01-13

Family

ID=9194993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835499A Expired GB2006944B (en) 1977-09-02 1978-09-04 Electret devices and illuminated indicator systems incorporating them

Country Status (7)

Country Link
JP (1) JPS5449100A (de)
BE (1) BE870113A (de)
DE (1) DE2838277C3 (de)
FR (1) FR2402220A1 (de)
GB (1) GB2006944B (de)
LU (1) LU80175A1 (de)
NL (1) NL7808984A (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4736202A (en) * 1984-08-21 1988-04-05 Bos-Knox, Ltd. Electrostatic binary switching and memory devices
WO1986001627A1 (en) * 1984-08-21 1986-03-13 Simpson George R Array of electrostatically actuated binary devices
US4794370A (en) * 1984-08-21 1988-12-27 Bos-Knox Ltd. Peristaltic electrostatic binary device
IT1303597B1 (it) * 1998-12-09 2000-11-14 Fiat Ricerche Dispositivo ottico e stato di funzionamento variabile, in particolareotturatore o specchio, a controllo elettrostatico.
US6427910B1 (en) * 1999-12-17 2002-08-06 International Business Machines Corporation Method for managing and updating overloaded cards

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897997A (en) * 1974-02-01 1975-08-05 Charles G Kalt Electrostatic display device with variable reflectivity

Also Published As

Publication number Publication date
LU80175A1 (fr) 1979-02-12
NL7808984A (nl) 1979-03-06
BE870113A (fr) 1978-12-18
FR2402220B1 (de) 1982-01-08
DE2838277C3 (de) 1981-10-01
JPS5449100A (en) 1979-04-18
DE2838277A1 (de) 1979-03-08
GB2006944A (en) 1979-05-10
FR2402220A1 (fr) 1979-03-30
DE2838277B2 (de) 1981-01-22

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Legal Events

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