Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-04-06
1995-07-04
Weldon, Ulysses
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345110, 40473, G09G 316
Patent
active
054304636
DESCRIPTION:
BRIEF SUMMARY
The present invention relates essentially to a display element with teeth on the arrises of the vertical faces; display panel and display system comprising them.
Document FR-A-2,610,438 from the same inventor already discloses a display element formed by a cube with display toothing and erasing toothing, as well as display panels comprising such display elements and a display system. In this prior solution, the cubes comprise teeth associated with horizontal axial faces, the teeth being arranged substantially perpendicularly to the associated vertical lateral face and in an off-centred manner.
This prior solution has given satisfaction, but separately required an upper writing toothing and a lower erasing toothing, which led in turn to a considerable size of the display cubes.
The object of the present invention is therefore to solve the new technical problem consisting in supplying a solution making it possible substantially to reduce the size of the display elements, thus making it possible to increase the precision of the image.
A further object of the present invention is to solve the new technical problem consisting in supplying the solution making it possible to simplify the implementation of the writing system, as well as to improve the distribution of friction when rotating the display elements.
A further object of the present invention is to solve the new technical problem consisting in supplying a solution making it possible to prove greatly the display and/or erasing speed, particularly so that the scanning speed can be at least equal to or greater than 0.3 m/s while exhibiting high security in positioning the display elements with a minimum risk of error.
The present invention makes it possible to solve these new technical problems for the first time in a simultaneous way, which is particularly simple, less expensive, and can be used on an industrial scale. The invention thus makes it possible to construct large surfaces of display panel whilst retaining simplified management of the display and of the erasing while even improving the reliability.
Thus, according to a first aspect, the present invention provides a display element including a member in the form of a block including at least one first axial face and one second axial face arranged horizontally, or vertically, substantially parallel to each other and joined together by a plurality of vertical or horizontal lateral faces constituting display surfaces of different colours, and arranged substantially perpendicularly to the said first and second axial faces, defining junction arrises with the latter, the said member forming a block including an axial through orifice the axis of which is substantially perpendicular to the said axial faces and intended to receive a rotation support element, the said member forming a block comprising means for rotating about the said rotation support element, so that it can present each lateral face in the display position in succession, the said rotation means being intended to be controlled by rotation control means for displaying or erasing a given colour in order to define or erase an item of information in conjunction with other identical display elements, characterized in that the rotation means comprise first mechanical means termed display means allowing a given colour to be displayed, and arranged on each of the lateral faces, rotationally secured to the latter, and controlled by the said control means, and second mechanical means termed erasing means making it possible to reposition to an initial colour, arranged on just one of the said lateral faces, controlled by the said control means; preferably, the control means comprise first control means controlling the first mechanical display means and second control means separate from the first control means and controlling the second mechanical erasing means.
According to an advantageous embodiment, the first mechanical display means comprise a tooth arranged off centre towards one arris of the face which supports it, intended to interact with the a
REFERENCES:
patent: 3949392 (1976-04-01), Caritato
patent: 4761905 (1988-08-01), Black
patent: 4912442 (1990-03-01), Black
FM Incoming
Luu Matthew
Seaby George A.
Weldon Ulysses
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