WO2002058040A1 - Pixel element for a reflective display device with modifiable image, display device and system using same, method for making same - Google Patents
Pixel element for a reflective display device with modifiable image, display device and system using same, method for making same Download PDFInfo
- Publication number
- WO2002058040A1 WO2002058040A1 PCT/FR2002/000193 FR0200193W WO02058040A1 WO 2002058040 A1 WO2002058040 A1 WO 2002058040A1 FR 0200193 W FR0200193 W FR 0200193W WO 02058040 A1 WO02058040 A1 WO 02058040A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- element according
- wires
- display device
- stator part
- section
- Prior art date
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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
Definitions
- the present invention relates to a constituent element, of pixel type, for a reflective display device , that is to say visible using ambient light, and provided with a possibility of automatically controlling the displayed image. It also relates to a display device implementing said element and a manufacturing process.
- the targeted field is in particular that of the display on panels any format and that of the labeling of products for which a definition of the order of mm 2 is sufficient.
- the present invention also relates to a system implementing this display device with in particular a remote control via a control unit in connection with a communication network.
- reflective panels capable of offering several images which consist of cells with several faces of a few cm 2 (often columns) and comprising a portion of printed image which is rotated jointly so as to reconstitute this image.
- the operating cost is important because it is necessary to have an operator on site to change the cells when we want to change the series of images and it is necessary to carry out the cells with each change (manufacturing and printing).
- the display systems capable of offering an infinite number of images are currently electronic systems with plasma screens and LED screens. These systems are, however, bulky, fragile and expensive, especially in terms of manufacturing and use costs because they require a constant supply of energy. They are in fact too sophisticated for the intended field of use, in particular because in this field, the poster can remain in place for a long period of time, or because the time to pass from one image to another does not doesn't need to be fast (around several seconds is enough).
- the present invention aims in particular to overcome these drawbacks, namely to provide a reflective display device offering an infinity of reconstructable images, which is economically profitable in the field of display and labeling, which is robust and requiring reduced maintenance, available in all sizes and shapes.
- a pixel type element for a reflective display device with modifiable image characterized in that it is of the rotor type intended to cooperate with a stator part, having for this purpose at least one axis of rotation parallel to the plane of view, with respect to which it is adapted to pivot according to precise axial positions and having at least one permanent localized polarity and adapted to cooperate with at least one exciter of said stator part, said element being divided into at least two angular sectors of main nuance different and said element being a composite element consisting of a section of son.
- each cell being defined by:
- stator part comprising at least one exciter
- the polarity or polarities of the rotary element can be of the electrostatic type, the associated exciter or exciters of the stator part being electrodes.
- They can also be of the magnetic type, the associated exciter or exciters being conductors supplied by a current in one direction or another.
- the polarity (s) can be obtained either before mounting the rotary element or by induction after mounting.
- Each cell can be compared to a "Micro Electro Mechanical System” (MEMS) from the family of actuator components.
- MEMS Micro Electro Mechanical System
- the operation is based on the addressed command of electric or magnetic fields selectively rotating the rotating elements of the cells on the desired shade, by a phenomenon of repulsion and / or attraction of polarity (s).
- electrostatic polarities the operation requires an energy supply mainly in voltage at the time of the image change.
- magnetic polarities current operation requires a low energy input.
- each visible part of the cell can be equivalent to a pixel of a few mm 2, this eliminates the printing operations and an infinite number of images can be produced;
- the cells can be controlled remotely: we can completely eliminate interventions on site and carry out real-time updates and animations; the device can be installed on a mobile vehicle;
- the device can be thin and can be adapted to existing display media; it can have any shape.
- the polarity of the rotating element can be located in one of the sectors.
- Another sector (preferably diametrically opposite) can have an opposite polarity in particular to balance the system and facilitate rotation.
- the rotary element may have only two sectors, therefore only two shades, which is sufficient for use for example in the field of labeling.
- one of the sectors will be provided with a polarity and a stator with an exciter will suffice to rotate the rotary element in two positions (attraction or repulsion of the polarity).
- each wire corresponds to a sector.
- the rotor part is a section of wires divided into six equal sectors longitudinally, two diametrically opposite sectors are polarized in opposite directions and the other four sectors are neutral. We can thus have for the sectors the basic colors of the hexachromy.
- the stator part is made up of two exciters. The different possible combinations of the repulsion and polarization attraction system allow the section to pivot in the six axial positions.
- the colors of the sectors may also be colors chosen according to commercial criteria (for example the colors corresponding to a brand).
- the sections are obtained by cutting a strand of tinted wires.
- the yarns such as chitosan® (positively charged) or PVC (negatively charged) to obtain one or more electrostatic polarities in a simple manner.
- the yarns may come from the spinning industry, the cost prices of which are advantageous.
- the rotary element In its cell, it will for example be housed in a capsule filled with a non-viscous liquid of density substantially equal to that of the rotary element, or else the rotary element will have a hollow core to be able to be mounted axially in a collar, or alternatively it will be provided with guipure preventing contact with the internal wall of the capsule.
- the rotors can advantageously be assembled by encapsulation in a chain in flexible tubes twisted in strings or else strung in a collar. They can also be housed in a molded or machined substrate, said substrate containing, for example, a network of conductive wires forming the electrodes of the stator parts of the cells.
- stator part of the cells are possible, for example an electrode matrix, or components with direct electrodes, or even using a mixture of these two techniques.
- the present invention also relates to a remote display system characterized in that it comprises: at least one transmitting site with: - data control and processing means making it possible in particular to design a poster and to transcribe said poster into a series of data picture ;
- the image data correspond to the commands of the exciters of the cells.
- FIG. 1 shows a block diagram of a rotary cell comprising a pixel type element according to an embodiment of the invention with six sectors;
- FIG. 2 illustrates the operation of the cell of Figure 1;
- FIG. 3 shows a particular embodiment of rotors based on a strand of son encapsulated in a chain;
- FIG. 1 shows a cell comprising an element 1 of section in circular section and having a centered axis of rotation A, forming a rotor part cooperating with a stator part which will be described later.
- Element 1 is divided into six equal angular sectors 1 a-1f each having at least on the surface (here in all the material) a specific main shade, the six sectors corresponding for example to the basic colors of the hexachromy: cyan, yellow, magenta, black, white and flesh.
- the element 1 is free to rotate about its axis A.
- the stator part consists of an opaque material substrate 5 shaped by molding and defining a housing with a visibility window 6 for receiving the capsule 2 while allowing its rotation with respect to the axis A.
- the window 6 is dimensioned so as to leave globally visible only the chosen sector of the rotary element corresponding to a chosen main shade.
- Two exciters here independent electrodes 7a and 7b, are formed in the substrate 5 opposite the capsule 2 and arranged at approximately 120 ° from one another in a plane situated opposite the view plane so to be advantageously located at the rear of the cell.
- the electrodes are close enough, or even in contact with the capsule 2, so that they can interact with the positive charge of sector 1b and with the diametrically opposite negative charge of sector 1 e of rotary element 1.
- the electrodes 7a, 7b can be positive, negative or neutral polarized. From left to right in Figure 2 are represented the six possible positions:
- the charged sector + of the rotary element is placed halfway between the two electrodes and the charged sector - is placed automatically opposite;
- the electrodes 7a and 7b are selectively polarized negatively attracting opposite it the charge + of the rotary element and repelling the opposite charge -;
- the rotary element 1 is shown in section perpendicular to its axis of rotation A.
- the rotary element is a composite element consisting of 'a section 10 of a few mm2 in length which was obtained by cutting a strand of six wires 10a-f assembled side by side longitudinally in hexagon to form at its periphery six angular sectors.
- the core of the strand is hollow.
- Each thread is itself made up of a set of tinted fibers then coated with a waterproofing layer 1 1 a-f.
- FIG. 3 also shows a method of assembling sections 10 in a chain consisting of using at the start a tube made of transparent impermeable material into which a liquid 13 is introduced (which allows, as explained above, the free rotation of the section 10) and a section 10, and said material is twisted to form a chain of aligned capsules 14.
- a tube made of transparent impermeable material into which a liquid 13 is introduced (which allows, as explained above, the free rotation of the section 10) and a section 10, and said material is twisted to form a chain of aligned capsules 14.
- a display device comprises lines of strings housed in a substrate which is complementary shaped and a network of conductive wires forming independent point electrodes, for example molded in said substrate, to form the parts. stators cooperating with the encapsulated rotors.
- the substrate can thus contain a network of conductive wires arranged in a grid forming the electrodes of the stator part of each cell.
- the device further comprises control means comprising addressing means, for controlling all of the stator parts of the cells so as to selectively rotate the rotary elements with respect to said axis to make visible for each cell a sector chosen according to its shade, all the visible sectors of all the cells constituting the displayed image.
- a remote display system comprising: at least one transmitting site with:
- FIG. 4 illustrates a variant of the operation of a rotor with six sectors.
- the stator part here comprises three electrodes A, B and C arranged at 120 ° from one another around the rotor and which can be positively or neutrally polarized. From left to right of the figure we see the six possible positions of the rotor: - The first three positions corresponding to the selective positive polarization of one of the electrodes leading to rotate the rotor to bring the negative charge in front of the polarized electrode; and
- Figure 5 is shown an alternative embodiment of the section 10 of Figure 3 to perfect the definition of the display device. It consists in providing, for example in each wire (10a) two peripheral portions (10a 'and 10a ") whose fibers have the color of the adjacent wire (respectively 10b and 10f) so as to have only one color in the field of visibility (symbolized by dotted lines) and possibly widening it. It goes without saying that other variant embodiments are also possible, for example the production of clearly submillimetric cells, by exploiting the technical potential offered by the component industry micro actuators.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02711998A EP1362338B1 (en) | 2001-01-17 | 2002-01-17 | Pixel element for a reflective display device with modifiable image, display device and system using same, method for making same |
DE60230723T DE60230723D1 (en) | 2001-01-17 | 2002-01-17 | IMAGE POINT ELEMENT FOR REFLECTIVE DISPLAY DEVICE FOR CHANGING IMAGES, DISPLAY DEVICE AND SYSTEM AND MANUFACTURING METHOD THEREFOR |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100573A FR2819617B1 (en) | 2001-01-17 | 2001-01-17 | PIXEL-TYPE ELEMENT FOR A REFLECTIVE IMAGE-MODIFIED DISPLAY DEVICE, DISPLAY DEVICE AND SYSTEM USING THE SAME |
FR01/00573 | 2001-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002058040A1 true WO2002058040A1 (en) | 2002-07-25 |
Family
ID=8858900
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/000193 WO2002058040A1 (en) | 2001-01-17 | 2002-01-17 | Pixel element for a reflective display device with modifiable image, display device and system using same, method for making same |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1362338B1 (en) |
AT (1) | ATE420427T1 (en) |
DE (1) | DE60230723D1 (en) |
FR (1) | FR2819617B1 (en) |
WO (1) | WO2002058040A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2191803A5 (en) * | 1972-07-06 | 1974-02-01 | Mors Materiel | |
US4769638A (en) * | 1986-10-30 | 1988-09-06 | Woolfolk Robert L | Color graphics information display |
EP0490442A2 (en) * | 1990-12-12 | 1992-06-17 | Solari Udine S.P.A. | Elementary cell combinable to form dot matrix displays |
GB2320124A (en) * | 1996-12-06 | 1998-06-10 | James Roelof Thomas | Road sign |
EP0935230A2 (en) * | 1998-02-06 | 1999-08-11 | Canon Kabushiki Kaisha | Colored ball display system |
US6055091A (en) * | 1996-06-27 | 2000-04-25 | Xerox Corporation | Twisting-cylinder display |
-
2001
- 2001-01-17 FR FR0100573A patent/FR2819617B1/en not_active Expired - Fee Related
-
2002
- 2002-01-17 EP EP02711998A patent/EP1362338B1/en not_active Expired - Lifetime
- 2002-01-17 WO PCT/FR2002/000193 patent/WO2002058040A1/en not_active Application Discontinuation
- 2002-01-17 AT AT02711998T patent/ATE420427T1/en not_active IP Right Cessation
- 2002-01-17 DE DE60230723T patent/DE60230723D1/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2191803A5 (en) * | 1972-07-06 | 1974-02-01 | Mors Materiel | |
US4769638A (en) * | 1986-10-30 | 1988-09-06 | Woolfolk Robert L | Color graphics information display |
EP0490442A2 (en) * | 1990-12-12 | 1992-06-17 | Solari Udine S.P.A. | Elementary cell combinable to form dot matrix displays |
US6055091A (en) * | 1996-06-27 | 2000-04-25 | Xerox Corporation | Twisting-cylinder display |
GB2320124A (en) * | 1996-12-06 | 1998-06-10 | James Roelof Thomas | Road sign |
EP0935230A2 (en) * | 1998-02-06 | 1999-08-11 | Canon Kabushiki Kaisha | Colored ball display system |
Also Published As
Publication number | Publication date |
---|---|
EP1362338A1 (en) | 2003-11-19 |
FR2819617B1 (en) | 2004-06-18 |
DE60230723D1 (en) | 2009-02-26 |
FR2819617A1 (en) | 2002-07-19 |
ATE420427T1 (en) | 2009-01-15 |
EP1362338B1 (en) | 2009-01-07 |
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