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 boardInfo
- 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
Links
- 239000011159 matrix material Substances 0.000 title abstract 2
- 230000001154 acute effect Effects 0.000 abstract 1
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.
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) |
-
1979
- 1979-05-10 IT IT6799379A patent/IT1118635B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7967993A0 (en) | 1979-05-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970530 |