GB1365911A - Information display devices - Google Patents
Information display devicesInfo
- Publication number
- GB1365911A GB1365911A GB940671A GB940671A GB1365911A GB 1365911 A GB1365911 A GB 1365911A GB 940671 A GB940671 A GB 940671A GB 940671 A GB940671 A GB 940671A GB 1365911 A GB1365911 A GB 1365911A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shutters
- vertical
- shutter
- field
- horizontal
- 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
Links
Classifications
-
- 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
- G09F9/375—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 position of the elements being controlled by the application of a magnetic 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)
Abstract
1365911 Matrix displays UNIVERSAL TELEWRITERS (PTY) Ltd 14 April 1972 [14 April 1971] 9406/71 Heading G5C A display device comprises an opaque apertured sheet 2, a shutter 11, 16, mounted on a magnetic member 21 ... 26, associated each aperture 4, 5, 6 and a plurality of selectively energized magnetic field producing means which move each member and to shutter between two stable positions. Conductor loops 31, 32, 33, 41, 42 extend along each row and column of pivot axes of the magnets. A current pulse in any vertical loop produces a horizontal field which moves adjacent shutters unless they are held down by a vertical field produced by a horizontal loop. Alternatively a combined horizontal and vertical field may be required to move the shutters. The shutter and magnetic member may form a single component. The movement of the shutters is limited by stop members which may be permanent magnets to increase stability. In another embodiment the magnetic member is of soft iron. The two arms of the horizontal loops are in a vertical plane producing a field which magnetises the member which can then be moved by current in vertical loops. Alternatively the shutters are mounted in square apertures and comprise cylindrical members 70 with opaque and transparent areas. The cylinders are pivoted about their axes 72 and the mangetic members 73 are radially mounted. A spherical shutter may be mounted in a circular aperture.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB940671A GB1365911A (en) | 1971-04-14 | 1971-04-14 | Information display devices |
IT68148/72A IT954676B (en) | 1971-04-14 | 1972-04-13 | INFORMATION PRESENTING DEVICE |
US00243950A US3775881A (en) | 1971-04-14 | 1972-04-14 | Information display device |
CA140,196A CA977962A (en) | 1971-04-14 | 1972-04-14 | Information display devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB940671A GB1365911A (en) | 1971-04-14 | 1971-04-14 | Information display devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1365911A true GB1365911A (en) | 1974-09-04 |
Family
ID=9871368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB940671A Expired GB1365911A (en) | 1971-04-14 | 1971-04-14 | Information display devices |
Country Status (4)
Country | Link |
---|---|
US (1) | US3775881A (en) |
CA (1) | CA977962A (en) |
GB (1) | GB1365911A (en) |
IT (1) | IT954676B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3995386A (en) * | 1972-10-18 | 1976-12-07 | Hassan Paddy Abdel Salam | Information display device |
US4359698A (en) * | 1980-07-09 | 1982-11-16 | Ford Motor Company | Reflecting type light modulator |
US4358743A (en) * | 1980-07-09 | 1982-11-09 | Ford Motor Company | Light modulator |
US4819357A (en) * | 1982-01-22 | 1989-04-11 | Salam Hassan P A | Information display devices |
FR2555343B1 (en) * | 1983-11-23 | 1987-01-23 | Cetehor | LIGHT DISPLAY DEVICE |
FR2588403B1 (en) * | 1985-10-08 | 1988-03-25 | Sncf | VARIABLE GRAVITY STABILIZED DISPLAY DEVICE |
GB8606193D0 (en) * | 1986-03-13 | 1986-04-16 | Unisplay Sa | Display device |
US4861505A (en) * | 1988-12-01 | 1989-08-29 | Jacqueline Farman | Novelty soap |
US5115228A (en) * | 1990-08-02 | 1992-05-19 | International Business Machines Corporation | Shuttered display panel |
US5500652A (en) * | 1992-11-19 | 1996-03-19 | American Electronic Sign Company | Display element with reflective lens |
US6677922B1 (en) | 1995-12-04 | 2004-01-13 | 3M Innovative Properties Company | Display element having retroreflective surface |
US10529260B2 (en) * | 2015-12-29 | 2020-01-07 | Christie Digital Systems Usa, Inc. | System for mounting a plurality of display units |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3036300A (en) * | 1958-12-30 | 1962-05-22 | Ibm | Electromagnetic display device |
US3295238A (en) * | 1963-11-01 | 1967-01-03 | Ferranti Packard Ltd | Sign element |
GB1194597A (en) * | 1967-09-27 | 1970-06-10 | Universal Telewriters Pty Ltd | Improvements in or relating to Matrix Display Devices |
-
1971
- 1971-04-14 GB GB940671A patent/GB1365911A/en not_active Expired
-
1972
- 1972-04-13 IT IT68148/72A patent/IT954676B/en active
- 1972-04-14 CA CA140,196A patent/CA977962A/en not_active Expired
- 1972-04-14 US US00243950A patent/US3775881A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3775881A (en) | 1973-12-04 |
CA977962A (en) | 1975-11-18 |
IT954676B (en) | 1973-09-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |