IT1118635B - Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board - Google Patents

Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board

Info

Publication number
IT1118635B
IT1118635B IT6799379A IT6799379A IT1118635B IT 1118635 B IT1118635 B IT 1118635B IT 6799379 A IT6799379 A IT 6799379A IT 6799379 A IT6799379 A IT 6799379A IT 1118635 B IT1118635 B IT 1118635B
Authority
IT
Italy
Prior art keywords
lamp
vane
vanes
board
observer
Prior art date
Application number
IT6799379A
Other languages
Italian (it)
Other versions
IT7967993A0 (en
Original Assignee
Salam Hassan Paddy Abdel
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 Salam Hassan Paddy Abdel filed Critical Salam Hassan Paddy Abdel
Priority to IT6799379A priority Critical patent/IT1118635B/en
Publication of IT7967993A0 publication Critical patent/IT7967993A0/en
Application granted granted Critical
Publication of IT1118635B publication Critical patent/IT1118635B/en

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Landscapes

  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

A matrix display comprises an array of display elements arranged in vertical and horizontal rows. Each element comprises a vane pivotally mounted for movement between stable positions in one of which the vane covers a light-transmissive area contained in an opaque member arranged to be illuminated from behind by a first light source and displays a low-reflectance face to an observer. In a second stable position the vane exposes the illuminated area to the observer and also reflects light from a second source towards the observer for which purpose the vane may be supported at an acute angle to the opaque member. Each vane is fastened to a permanent magnet arranged to cooperate with a reversibly polarisable electromagnet to be moved from one stable position to the other.
IT6799379A 1979-05-10 1979-05-10 Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board IT1118635B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT6799379A IT1118635B (en) 1979-05-10 1979-05-10 Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6799379A IT1118635B (en) 1979-05-10 1979-05-10 Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board

Publications (2)

Publication Number Publication Date
IT7967993A0 IT7967993A0 (en) 1979-05-10
IT1118635B true IT1118635B (en) 1986-03-03

Family

ID=11307028

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6799379A IT1118635B (en) 1979-05-10 1979-05-10 Matrix display device using movable vanes - has mirror on vanes reflecting light from lamp in front of display board and second lamp is situated behind board

Country Status (1)

Country Link
IT (1) IT1118635B (en)

Also Published As

Publication number Publication date
IT7967993A0 (en) 1979-05-10

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Legal Events

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TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970530