CN1691095A - Electro magnetic display pixel driving system - Google Patents
Electro magnetic display pixel driving system Download PDFInfo
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- CN1691095A CN1691095A CN 200410099759 CN200410099759A CN1691095A CN 1691095 A CN1691095 A CN 1691095A CN 200410099759 CN200410099759 CN 200410099759 CN 200410099759 A CN200410099759 A CN 200410099759A CN 1691095 A CN1691095 A CN 1691095A
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- thin plate
- magnetic
- display pixel
- change
- magnets
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- 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
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- 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)
- Mechanical Light Control Or Optical Switches (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
New technical solution of the electromagnetic display pixel driving system solves the problem of switching the display pixel flap between two bistable ON and OFF positions. The magnetic circuit of the display pixel consists of a permanent magnet in the display pixel flap and an electro-magnet with a magnetic core. Said permanent magnet is made using an injection molding process and is divided in two areas with antiparallel direction of magnetization, which is also perpendicular to the flap's surface and pivoting axis. Electro magnet is placed under the flap and has a preferably U shaped magnetic core, which is oriented parallel to the pivoting axis. This design minimizes the stray magnetic field and interactions between neighboring display pixels.
Description
Invention field
The objective of the invention is structure, material and the production run of the magnetic circuit of display pixel in the electromagnetic display panel, this magnetic circuit orders about the rotation of display pixel thin plate.
The present invention is sorted in the group of bistable magnetic actuator, and the bistable magnetic actuator is based on the interaction between the magnetic field of magnetic field that is built in permanent magnet in the display pixel thin plate and electromagnet magnetic core.
According to International Classification of Patents, present patent application is sorted in the group of H01F3/14, H01F7/14 and H01F7/121, and its application class is in the group of G09F3/4 and G09F9/37.
Technical matters to be solved by this invention provides novelty, simple, compact and structure low production cost of display pixel electromagnetic driving system.
This electromagnetic system is actually bistable actuator, and it must be transformed into the second bistable position (and opposite conversion) with display pixel with the energy consumption of minimum from the first bistable position.Therefore must comprise material by the specialized designs magnetic circuit with specific magnetic performance.In addition, must optimize the design of magnetic circuit, thereby reduce the magnetic interaction between the adjacent display pixel as far as possible.This system must move and must guarantee the stability of two bistable positions of display pixel thin plate in wider temperature range.If the external force that is caused by mechanical stress, impact, vibrations or similar situation causes the variation of the position of display pixel thin plate, then the residue magnetic force on the display pixel thin plate should enough be used for recovering needed position immediately after external force disappears.
Technical background
Electromagnetic display panel is known by people and has been surpassed 20 years, and just in the application in various fields, play an important role, in the application in various fields, need the display panel of relatively large size, medium information content under quite high background illumination, to have high-contrast and excellent visibility.(US 3,871,945, and US 4,577 to be used for the bistable electromagnetic display panel of large-scale message panel of display, airport, motorbus and the train station of traffic sign, motorbus and train destination and motion race, 427, US 4,860,470, and EP 0 084959, EP 0 731 435 A1, US 4,243,978, and US 5,771,616, US 6,272, and 778, US 6,025,825, and US 5,898,418, US 6,603,458 ...) as if satisfied well top requirement.On selected pel, use bright reflection paint and on non-selected zone, use the black that mates, these displays under high ambient lighting conditions, to have good contrast and excellent angle observability.
The principle of operation of current prior art solution is mainly only inwardly rotated around pivot in the mechanical constraint position based on removable pixel thin plate, and this rotates typically≤180 °, and the pixel thin plate has the size of whole display pixel.Be coated in the pigment that visually forms sharp contrast on the front side and rear side of thin plate (EP 0327250, and US 6,272,778, and US 6,025,825, US5, and 898,418 ...).In order to change between " connection " and " disconnection " state of display pixel, typically, these solutions use one to be inserted in the fixed permanent magnet in the removable pixel thin plate and to twine that straight (EP 0327250, and US 6,603,458, US 6,272,778 ...) or U type magnetic core (US 4,243, and 978, US 6,025,825, and US 5,898,418, US 5,005,305 ...) built-in solenoid.Some technology solutions use other fixed permanent magnet to improve the stability (US 4,243,978, and US 4,513,318) of thin plate bistable position.
Yet also have another known different substantially principle of operation, it is based on display pixel is divided into two parts.For each partial pixel provides rotatably that install, bistable tilting thin plate, this tilting thin plate is asymmetric about its turning axle.When thin plate was arranged in of two settling position, this tilting thin plate covered in two parts of panel surface in pixel region.Apply with a kind of pigment in the face of the side of this tilting thin plate of panel front side with by the part of the display panel in pixel region of its covering, and the remainder of the opposition side of thin plate and pixel region is used and first kind of pigment pigment coating (US6 different, that form the height sharp contrast, 603,458, DE 3501912C2, DE 3601018A1).In order to change between " connection " and " disconnection " state of display pixel, these solutions are used and are inserted in the permanent magnet in each tilting thin plate and make its closely contiguous turning axle.This tilting thin plate rotates to the second bistable position by the electromagnet with straight magnetic core from the first bistable position, and this electromagnet is positioned at the reverse side of each display pixel.The solution that this structure is compared other prior art has certain advantage, can make total attenuation significantly (having only a half-pix surface to rotate around pivot) because compare with the technology solution of describing as the front.
Summary of the invention
The objective of the invention is to be increased in the efficient and the reliability that drive the display pixel magnetic drive system of display pixel thin plate between pixel " connection " and " disconnection " state.The stability that the solution that is proposed makes is energy consumption minimized, be increased in thin plate in two bistable positions, interaction between the adjacent display pixel is minimized and obtain the pixel production of compacter pixel design and robotization and thinner display pixel with the component parts of smaller amounts.
The invention provides the new design of magnetic circuit, according to claim 1, this design produces the magnetic moment of torsion that acts on the display pixel thin plate in two separate areas.Have two zones of action and increased the magnetic moment of torsion that acts on the display pixel.
This preferably can be realized by the permanent magnet on U type solenoid magnetic core and (one or two) thin plate.Unlike the prior art solution of using U type magnetic core, U type magnetic core 3u (Fig. 1) be positioned at display pixel thin plate pivot 2d below, as much as possible near thin plate and be parallel to the pivot 2d of display pixel thin plate.This position of U molded lines circle magnetic core and orientation are compared with above-mentioned prior art solution and have been reduced the magnetic moment of torsion significantly to the dependence of sheet position and reduced display thickness.Permanent magnet setting in the thin plate is an integral body with antiparallel magnetization direction, and wherein this direction of magnetization perhaps is divided into two independent parts also perpendicular to thin sheet surface and perpendicular to pivot, and these two independent parts also are antiparallel magnetizations.Magnet is preferably made by plastic bonding NdFeB material or plastic bonding Ferrite Material that the injection molding process is made.
Thereby will be transformed into the required energy consumption of another settling position from a settling position of display pixel thin plate and reduce to minimum by using Finite Element Method correctly to select material can optimize magnetic Circuit Design.Provide the efficient of magnetic system, the reliability and stability of two bistable positions of display pixel thin plate by the magnetic moment of torsion that increases.The magnetic Circuit Design that proposes minimizes stray magnetic field and reduces magnetic interaction between the neighbor.Therefore do not need the situation of picture in patent US 6,606,458 to make magnet antiparallel orientations in the adjacent display pixels thin plate like that.
The accompanying drawing summary
By with reference to the accompanying drawings, the present invention may be better understood, and its purpose and advantage will become more obvious for a person skilled in the art, and accompanying drawing is as follows:
The magnetic converting system of Fig. 1-use U type electromagnet (3u+5) comprising:
Has built-in (plastic bonding NdFeB or plastic bonding ferrite) magnet 2c
1, 2c
2Rotatable thin plate 2 with pivot 2d; Two surperficial 2a of thin plate and 2b scribble the pigment that forms the height sharp contrast,
Solenoid 5
U type magnetic core 3u
The structure of the sections of the display of Fig. 2-have convertible display pixel of electromagnetism;
Fig. 3-stray magnetic field
Fig. 3 a-is stablizing the magnetic field calculation model of sheet position for U type magnetic core,
Fig. 3 b-is for the magnetic field calculation model of U type magnetic core in unstable sheet position,
Fig. 3 c-is stablizing the magnetic field calculation model of sheet position for straight magnetic core,
Fig. 3 d-is for the magnetic field calculation model of straight magnetic core in unstable sheet position,
Fig. 4-display pixel thin plate production decision.
Detailed Description Of The Invention
Describe in detail according to electro magnetic display pixel driving system of the present invention with Fig. 1-4:
In the magnetic system that is used for conversion display pixel between " connection " and " disconnection " state according to the present invention, electromagnet has along the preferred U type magnetic core of the pivot orientation of thin plate, and the orientation of magnet is identical in all thin plates of display simultaneously.
The display pixel thin plate has the interior permanent magnets configuration, and this interior permanent magnets configuration is divided into two regional 2c
1And 2c
2The direction of magnetization in these two zones is antiparallel and perpendicular to the pivot 2d and the thin sheet surface of thin plate each other.As shown in Figure 1, the magnet in the thin plate 2 can be divided into two separated portions 2c selectively
1And 2c
2In the figure, magnetic system comprises thin plate 2 and the electromagnet (3u+5) with two permanent magnets.The corresponding direction of magnetization of the part of these two magnets is identical with the situation that two zones have a magnet.This magnet is made by plastic bonding NdFeB material or plastic bonding Ferrite Material.The product of display pixel thin plate is made with two parts process of injection molding, in this process process, with the magnet moulding, fills the remainder of this thin plate with plastics during second step during first step.Carry out the magnet moulding in the presence of magnetic field, this magnet produces the anisotropic magnetic performance, increases magnetic flux density and has therefore produced higher magnetic moment of torsion.This process produces enough magnetic moments of torsion for the display pixel thin plate.Though use the plastic bonding hard magnetic material, its magnetic property is markedly inferior to agglomerated material, the still feasible sufficient magnetization that is built in the permanent magnet in the display pixel thin plate of above-mentioned process.The magnetization of plastic bonding ferrimagnet is preferably carried out with the permanent rare earth element magnet that is built in the mould.Under the situation of using plastic bonding NdFeB magnet, preferably custom-designed current loop carries out in the mould by being built in magnetization, and this current loop is by the very short pulse power supply of very high electric current.The magnetization of built-in plastic bonding ferrimagnet is carried out simultaneously for all (for example 14) thin plates in the cover (Fig. 4).Unlike the solution of the straight magnetic core of use described in the US 6,603458, all thin plates in the display have identical magnetization orientation.This has simplified production significantly and process automation is more prone to.
Electromagnet comprises solenoid (coil) 5 and U molded lines circle magnetic core 3u.It is positioned over the following of thin plate turning axle and is parallel to this axle (Fig. 1 and Fig. 2).This orientation is compared with the solution of prior art and has been reduced the influence of sheet position to the magnetic moment of torsion, wherein make U type magnetic core towards perpendicular to this turning axle.
This solenoid (coil) is wrapped in plastic spiral tube body 1e and goes up (Fig. 2), and plastic spiral tube body 1e is a part that forms the monolithic block 1 of several display picture elements.The end of solenoid lead is welded in mount pin 4a and 4b, and mount pin 4a and 4b are inserted among socket 1c and the 1d.
Magnetic core 3u has U type shape and is made by the half-hard magnetic material of column type, and this half-hard magnetic material only could obtain its final magnetic property after carrying out sufficient thermal treatment.The one leg of this magnetic core is inserted in the coil 5, and one leg is inserted in the block 1 to fix its position in addition.U type magnetic core is compared with the situation of using the linear coil magnetic core can make up thinner display.
The magnetic circuit of display pixel (comprising the air gap between magnetic core, the magnet in the thin plate and the magnetic core and the magnet of electromagnet) designs with 3D computer modeling software and optimizes, and is optimized according to the magnetic property of employed material.Magnetic field in stable and unstable sheet position shown in Figure 3.
The invention is characterized in to have two zones that magnetic force acts on simultaneously in the display picture element thin plate, the zone of these two effects simultaneously produces the magnetic moment of torsion.This structure has increased the magnetic moment of torsion, and this magnetic moment of torsion also increases by the magnetic density that has increased when use has the electromagnet of U type magnetic core.Compare with straight magnetic core, U type magnetic core has the stray magnetic field (Fig. 3) of remarkable minimizing.Higher magnetic moment of torsion has increased the stability at " connection " and " disconnection " position display pixel thin plate.Therefore stray magnetic field has still less reduced crosstalk between adjacent pixels, and all thin plates in the display have identical magnetic aligning.
Be transformed into another sheet position by a sheet position and undertaken by the current impulse by solenoid 5, this current impulse makes the reversing magnetic field in the magnetic core.The magnetic direction that changes in the electromagnet magnetic core makes the current location instability of thin plate and thin plate is turned to second settling position, and this second settling position stops the back in current impulse and keep stable.
Example
Electromagnetic display panel typically comprises many square display pixels that are essentially with the display matrix arrangement.Because the display pixel of quite big quantity, the standard production scheme that is directly installed on based on the component part with single display pixel on the main PC plate of display panel proves complicated and expensive operation.In order to reduce cost and to simplify production, 7 pixels are connected on the monolithic block, this monolithic block is the primary element that is used to construct display matrix.This monolithic block 1 (Fig. 2) is made by the plastics of black coupling with the injection molding process.After moulding, the color with contrast in the 1a zone applies this piece.Then mount pin 4a and 4b are inserted among socket 1c and the 1d.Next step operation is to twine 7 solenoids on monolithic block 1, be welded on the end of winding on the mount pin and detect the Ohmage of winding.
Magnetic core 3u has U type shape and is made of the cylindrical rod of half-hard magnetic material, and this cylindrical rod only could obtain its final magnetic property after carrying out sufficient thermal treatment.The one leg of magnetic core is inserted in the coil 5, and one leg inserts in the block 1 to fix its position in addition.The end of magnetic core two legs all is positioned at the following of thin plate 2 turning axles and is oriented parallel with described axle.
Produce rotatable thin plate 2 dividually.Because thin plate 2 must have interior permanent magnets 2c
1, 2c
2So, use the plastic bonding Ferrite Material to make the latter with two parts process of injection molding.As for monolithic block 1, a side 2a of thin plate applies with same bright fluorescent paint, and keeps another demifacet 2b uncoated---the black original plastic surface of coupling.
The display pixel thin plate has the interior permanent magnets configuration, and this interior permanent magnets configuration is divided into two zones (part) 2c
1And 2c
2This regional direction of magnetization is antiparallel and perpendicular to the pivot 2d of thin plate, also perpendicular to thin sheet surface each other.Magnet is made by plastic bonding NdFeB material or plastic bonding Ferrite Material.Carry out the production of display pixel thin plate with two parts process of injection molding, in this process, during first step,, during second step, fill the remainder of thin plate with plastics with the magnet moulding.With the magnet moulding, this magnetic field produces the anisotropic magnetic performance in the presence of magnetic field, has increased the magnetic flux density of magnet and has therefore produced higher magnetic moment of torsion.The magnetic moment of torsion that this process is enough for the display pixel thin plate has produced.Though use the plastic bonding hard magnetic material, its magnetic property is markedly inferior to agglomerated material, the permanent magnet that above-mentioned process has still caused being built in the display pixel thin plate magnetizes fully.Carry out the magnetization of plastic bonding ferrimagnet by the permanent rare-earth magnet that is built in the mould.Under the situation of using plastic bonding NdFeB magnet, custom-designed current loop magnetizes in the mould by being built in, and this current loop is by the very short pulse power supply of very high electric current.The magnetization of built-in plastic bonding ferrimagnet is carried out simultaneously for all 14 thin plates in this cover (Fig. 4).Unlike the solution of using straight magnetic core among the US 6,603458, all thin plates in the display have identical magnetization orientation.This has simplified production significantly and process automation is more prone to.
In order to obtain most economical production, 14 thin plates are with 7 thin plates of the every row of two row injection moulding simultaneously (see figure 4), these 14 thin plates and dividing plate 19 link together, this dividing plate 19 make thin plate remain on exactly with monolithic block 1 on by the bearing 1f of 14 pivots, the determined identical location/distance place of 1g is so that optimize final display part (7 pixels) installation process.As for monolithic block 1, apply a side 2a of thin plate with identical bright fluorescent paint, and keep another demifacet 2b uncoated---the black original plastic surface of coupling.After applying thin plate 2, dividing plate 19 excise simultaneously and bearing 1f, 1g with 7 thin plates of the two every row of row, 2 while " compressing " 14 pivots on monolithic block 1 in.
Claims (10)
1, is used to change the magnetic system of the electro magnetic display pixel thin plate of display pixel, this system comprises: have the rotation thin plate (2) of two bistable positions and have magnetic core (3u) and the electromagnet (5+3u) of solenoid (5), this electromagnet moves to another bistable position with this thin plate (2) from a bistable position by current impulse, wherein this rotation thin plate (2) have built-in configurations of magnets (2c) and this electromagnet (5+3u) be positioned at this thin plate (2) below
It is characterized in that the described magnetic core of moulding (3u) makes by producing magnetic force in the separate areas on two spaces of this thin plate (2) simultaneously and producing the magnetic moment of torsion thus.
2, the magnetic system that is used to change the electro magnetic display pixel thin plate according to claim 1 is characterized in that:
Configurations of magnets (2c) in this rotation thin plate is divided into two zones or by two separated portions (2c
1And 2c
2) form, and (2a 2b) and perpendicular to thin plate pivot (2d) magnetizes with these zones or part antiparallel and perpendicular to thin sheet surface.
3, the magnetic system that is used to change the electro magnetic display pixel thin plate according to claim 2 is characterized in that: this configurations of magnets (2c) is set to and this pivot (2d) vicinity, and with described two separated portions (2c
1And 2c
2) be shaped to rectangle or be shaped to 1/4 right cylinder.
4, according to any one described magnetic system that is used to change the electro magnetic display pixel thin plate in the claim 1 to 3, it is characterized in that: this magnetic core (3u) is the U type, and is oriented to and is parallel to this pivot (2d).
5, the electromagnetic display panel that has a plurality of display pixels has according to any one described magnetic system in the claim 1 to 4, it is characterized in that, all configurations of magnets (2c) that are built in the thin plate of this display panel have the polarization of same antiparallel magnetic.
6, produce according to any one described method that is used to change the magnetic system of electro magnetic display pixel thin plate in the claim 1 to 5, it is characterized in that: the process of injection molding that utilizes the plastic bonding hard magnetic material, make the built-in configurations of magnets (2c) of this thin plate (2), and carry out this forming process in the presence of high-intensity magnetic field, this high-intensity magnetic field gives this plastic bonding magnet (2c) anisotropic characteristic.
7, production according to claim 6 is used to change the method for the magnetic system of electro magnetic display pixel thin plate, it is characterized in that: this configurations of magnets (2c) is made by the plastic bonding Ferrite Material, and be magnetized by the suitably shaped permanent magnet that rare earth is made, this permanent magnet is built in the shaping jig.
8, production according to claim 6 is used to change the method for the magnetic system of electro magnetic display pixel thin plate, it is characterized in that:
This configurations of magnets (2c) is made by plastic bonding NdFeB material, and is magnetized by special current loop, and wherein this current loop is built in the shaping jig, and in this forming process, applies current impulse when the plastics of bonded permanent magnet are still soft.
9, produce according to any one described method that is used to change the magnetic system of electro magnetic display pixel thin plate in the claim 1 to 8, it is characterized in that, this solenoid (5) directly is wrapped on the plastics monolithic block (1), and end and mount pin (4a with the solenoid lead, 4b) link to each other, described mount pin (4a, 4b) insert described monolithic block (1) socket (1c, 1d) in.
10, produce according to any one described method that is used to change the magnetic system of electro magnetic display pixel thin plate in the claim 1 to 9, it is characterized in that, the interaction between stray magnetic field and the neighbor is minimized.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SIP200400127 | 2004-04-28 | ||
| SI200400127A SI21771A (en) | 2004-04-28 | 2004-04-28 | Electromagnetic display drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1691095A true CN1691095A (en) | 2005-11-02 |
Family
ID=34935031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410099759 Pending CN1691095A (en) | 2004-04-28 | 2004-12-31 | Electro magnetic display pixel driving system |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1591983A3 (en) |
| CN (1) | CN1691095A (en) |
| RU (1) | RU2288510C2 (en) |
| SI (1) | SI21771A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741679A (en) * | 2016-05-06 | 2016-07-06 | 华通远航(北京)科技发展有限公司 | Non-LED (Light Emitting Diode) display and display screen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243978A (en) * | 1979-10-05 | 1981-01-06 | Ferranti-Packard Limited | Display or indicating device with magnetic stop |
| US6603458B1 (en) * | 1998-01-22 | 2003-08-05 | Annex Anzeignsysteme Gmbh | Electromagnetic display device |
-
2004
- 2004-04-28 SI SI200400127A patent/SI21771A/en not_active IP Right Cessation
- 2004-11-22 RU RU2004134003/09A patent/RU2288510C2/en not_active IP Right Cessation
- 2004-12-31 CN CN 200410099759 patent/CN1691095A/en active Pending
-
2005
- 2005-04-12 EP EP05007967A patent/EP1591983A3/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741679A (en) * | 2016-05-06 | 2016-07-06 | 华通远航(北京)科技发展有限公司 | Non-LED (Light Emitting Diode) display and display screen |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2288510C2 (en) | 2006-11-27 |
| RU2004134003A (en) | 2006-05-10 |
| EP1591983A3 (en) | 2006-08-16 |
| SI21771A (en) | 2005-10-31 |
| EP1591983A2 (en) | 2005-11-02 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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