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GB889277A - Improvements relating to switching devices - Google Patents

Improvements relating to switching devices

Info

Publication number
GB889277A
GB889277A GB3330357A GB3330357A GB889277A GB 889277 A GB889277 A GB 889277A GB 3330357 A GB3330357 A GB 3330357A GB 3330357 A GB3330357 A GB 3330357A GB 889277 A GB889277 A GB 889277A
Authority
GB
United Kingdom
Prior art keywords
conductors
cells
photo
conductive
layer
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
GB3330357A
Inventor
Donald Henry Smith
George Richard Hoffman
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.)
NAT RES DEV
National Research Development Corp UK
Original Assignee
NAT RES DEV
National Research Development Corp UK
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 NAT RES DEV, National Research Development Corp UK filed Critical NAT RES DEV
Priority to GB3330357A priority Critical patent/GB889277A/en
Publication of GB889277A publication Critical patent/GB889277A/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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/088—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements using a non-linear two-terminal element
    • G09G2300/0885—Pixel comprising a non-linear two-terminal element alone in series with each display pixel element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • G09G2360/148—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel the light being detected by light detection means within each pixel

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

889,277. Electroluminescence. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 2, 1958 [Oct. 24, 1957], No. 33303/57. Class 39(1) [Also in Group XXXVI] A switching device, particularly for use with an electroluminescent display device as described in Specification No. 888,433, comprises a layer 12a of electroluminescent material having a set of conductors 11a, 13a disposed on each face thereof in directions transverse to each other, and a plurality of photo-conductive cells each associated with the intersection of a different pair of conductors, each of the cells being provided with connecting leads 19, 20 by which they can be connected to external circuits 21 whereby a plurality of circuits can be selectively controlled, each by a different photo-conductive cell when energised by illumination thereof by fluorescence of the electroluminescent material at the associated intersection of conductors under the influence of signals applied to the conductors. The device can comprise a supporting plate 10a of glass on one face of which the set of conductors 11a, which are at least partially transparent, is printed, and on the other face of which the electrodes 17, 18 of the photo-conductive cells can be printed. The electrodes of the photoconductive cells can be formed by indium soldered to the plate by a tin/indium solder, and a layer of cadmium sulphide 16 can be provided as a photo-conductive layer overlying each pair of electrodes. The thickness of the plate can be so thin compared with the spacing of the intersections of the conductors and cells that fluorescence of the electroluminescent material at any one intersection of conductors is only effective to illuminate the associated cell, the illumination which would otherwise affect the adjacent cells being totally internally reflected within the plate. The cell circuits of the switching device shown in Fig. 2 can be energised by A.C. and used for controlling the crossed-conductors electroluminescent display device of Fig. 1. The ratio of the capacity of the two cells concerned to the capacity of the electroluminescent element involved should not exceed <SP>1</SP>/ 5 which is achieved by employing as thin a layer of phosphor as possible. As shown in Fig. 5 the conductors of the arrangement of Fig. 2 can be selected by the use of two further devices 22 and 23 constructed in accordance with the invention.
GB3330357A 1957-10-24 1957-10-24 Improvements relating to switching devices Expired GB889277A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3330357A GB889277A (en) 1957-10-24 1957-10-24 Improvements relating to switching devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3330357A GB889277A (en) 1957-10-24 1957-10-24 Improvements relating to switching devices

Publications (1)

Publication Number Publication Date
GB889277A true GB889277A (en) 1962-02-14

Family

ID=10351194

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3330357A Expired GB889277A (en) 1957-10-24 1957-10-24 Improvements relating to switching devices

Country Status (1)

Country Link
GB (1) GB889277A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833741A1 (en) * 2001-12-18 2003-06-20 Thomson Licensing Sa Display panel formed from a matrix of electroluminescent cells with shunt resistance to improve memory effect, uses optical coupling between drivers and display with shunt resistor over each display cell to improve its memory effect

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833741A1 (en) * 2001-12-18 2003-06-20 Thomson Licensing Sa Display panel formed from a matrix of electroluminescent cells with shunt resistance to improve memory effect, uses optical coupling between drivers and display with shunt resistor over each display cell to improve its memory effect
WO2003054843A2 (en) * 2001-12-18 2003-07-03 Thomson Licensing S.A. Image display panel consisting of a matrix of electroluminescent cells with shunted memory effect
WO2003054843A3 (en) * 2001-12-18 2004-04-15 Thomson Licensing Sa Image display panel consisting of a matrix of electroluminescent cells with shunted memory effect
US7439673B2 (en) 2001-12-18 2008-10-21 Thomson Licensing Image display panel having a matrix of electroluminescent cells with shunted memory effect

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