WO2002061714A2 - Modul für grafische anzeigen im freien - Google Patents
Modul für grafische anzeigen im freien Download PDFInfo
- Publication number
- WO2002061714A2 WO2002061714A2 PCT/AT2002/000039 AT0200039W WO02061714A2 WO 2002061714 A2 WO2002061714 A2 WO 2002061714A2 AT 0200039 W AT0200039 W AT 0200039W WO 02061714 A2 WO02061714 A2 WO 02061714A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- display module
- module according
- matrix plate
- extensions
- housing
- Prior art date
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
- G09F9/33—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 semiconductor devices, e.g. diodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
- G09F27/008—Sun shades, shades, hoods or louvres on electronic displays to minimise the effect of direct sun light on the display
Definitions
- the invention relates to large-screen nideo, graphic and text displays in outdoor applications. This requires a particularly high image brightness, which is why devices with LED fillings are becoming more and more popular, as technological developments ensure increasing LED efficiency.
- the light distribution can be more precisely adapted to the observation area by suitable, mostly oval shaping of the glass body of the LED, and the brightness can thus be further increased.
- the LEDs enable direct electronic control.
- the display surfaces of such devices consist of an arrangement of module-like modules, which have a mostly rectangular, in particular square, grid arrangement of mutually identical LED groups, referred to as pixels or pixels, in the basic colors red, green and blue, which by selective control and additive color mixing in a known manner can also represent all colors in between, including white.
- LEDs per pixel are required here, but arrangements are also known, with several LEDs per color being present in each pixel, as a result of which a better balanced ratio of the brightness of the three primary colors to one another and thus greater economy are achieved.
- the LEDs of a pixel can also be combined to form a structural unit in the course of rational production.
- the number and arrangement of the LEDs within a pixel also determines the sharpness or accuracy of the display that can be achieved.
- improved control methods which can generate a better image resolution and sharpness than the number of pixels, can increase the display quality.
- Another quality feature is the image contrast, i.e. the ratio between the brightest and darkest image content.
- the area between the LEDs is preferably black, so that a pixel without an electrical signal appears as dark as possible.
- the sun shines in every LED dome due to surface mirroring
- the sun rays penetrate the LED and are reflected in the internal LED reflectors, so that they cause an apparent glow even when the LED is switched off.
- LED designs without internal reflectors would have an insufficient light efficiency.
- the glass bodies of the LEDs are usually colored in order to absorb a substantial spectral portion of the sunlight and thereby to reduce the LED reflector gloss.
- the discoloration also slightly reduces the useful light, which is why it can only be used to a relatively small extent.
- sun visors as has been known for a long time with traffic signals, are arranged in the form of small, curved diaphragms above each pixel or horizontal slats close above the LED rows.
- these can only be kept relatively short, because otherwise the viewer cannot achieve sufficient viewing angles.
- slats are only effective in the case of individual horizontal LED rows.
- Other LED arrangements which are often preferred in terms of image quality, such as the “cube five arrangement”, cannot be adequately shielded by lamellae, just like the LED combined into pixels with a common parasol. There is no adequate remedy, especially when the sun is low, because part of the LED is fully exposed to sunlight.
- sun protection devices also cover a portion of the LED in relation to the viewer's point of view when viewed at a relatively oblique angle, so that the image can not only appear darker, but, depending on the arrangement of the primary color LED within the pixels, also have a color cast.
- LEDs have two metal feet, which are used for power supply, heat dissipation and above all for fastening and positioning.
- the LEDs must be aligned very precisely on the circuit boards, since positional deviations are negatively noticeable due to singular light or dark areas or irregular brightness in the image. LEDs are often bent out when being fitted or handled and then have to be readjusted.
- the LED connections must be sealed against moisture.
- they are usually cast with a black colored casting resin.
- this causes considerable problems in the event of an LED failure, which often cannot be replaced due to the potting compound and so an entire module has to be thrown away.
- the object of the invention was to develop a display module which has a very wide observation area, allows effective sun shielding with any LED arrangement, is sealed, but also enables non-destructive removal of the LED boards.
- the LEDs should be exactly aligned.
- the radiated solar heat and, of course, the operating heat should be effectively dissipated and kept away from the LEDs.
- Many light points should be able to be installed in one work process in order to enable economical production.
- the system is also said to be usable in display panels with a metal matrix plate.
- LED types with individually defined optics are also to be used, in particular the cheaper SMD designs, in order to be able to implement application-specific light distributions and low manufacturing tolerances at low cost.
- each sealing component in a display module, constructed from a perforated matrix plate, one or more sealing components, from at least one carrier plate with light sources together with lens bodies and a housing, each sealing component consists of tough elastic, rubber-like material, a base surface and on top of it several tubular extensions with a height corresponding According to the thickness of the matrix plate, the base surface of the sealing component rests on the inside of the matrix plate and the projections fit into the corresponding holes in the matrix plate so that the through openings present in the projections are adapted to the axial cross section of the glass body, but are considerably oversized, that the vitreous bodies are pressed in tightly and, by forwarding the radial pressing forces, also seal the extensions on the lateral surfaces of the holes in the matrix plate.
- the extensions are suitable for the direct shaping of sun visors for each individual light point, which can have the same appearance and thus the same effect and thus enable a uniform appearance. Furthermore, heat-conducting mechanical connections between the matrix plate and the rear wall of the housing are provided, which transport the solar heat to the rear wall of the housing, as well as a heat-conducting insulating layer between the carrier plate and the rear wall of the housing, which also conducts the resulting operating heat to the rear wall of the housing, from where the heat is transferred to the surroundings by means of shaded cooling fins is dissipated.
- FIG. 1 shows a module according to the invention in vertical section
- FIG. 2a shows the geometric relationships before and FIG. 2b shows an average section after the assembly process
- FIG. 3 shows a typical light source arrangement and hole geometry
- FIG. 4 shows another embodiment of the invention in FIG vertical section.
- a matrix plate 1 has a multiplicity of punched holes 2 which are distributed in a “cube-five arrangement” in a regular grid shape over the entire surface.
- Four identical sealing components 3 made of elastic, rubber-like material are shown behind the matrix plate.
- Each sealing component 3 has extensions 4 which form through holes 5. They all sit on the base surface 6 and are held together by them.
- the base surface 6 rests on the matrix plate 1, the extensions 4 fit snugly in the holes 2 of the matrix plate 1. They have approximately the same height as the thickness of the matrix plate 1 and therefore end flush with the front 7.
- Sun visors 8 each sit on the extensions 4, they are molded directly onto the extensions 4.
- the through holes 5 there are commercially available LEDs 9, in particular 3 mm, 5 mm LEDs or oval designs. They consist of the actual light source 10, cast into the light-shaping glass body 11, which has an approximately cylindrical outer surface 28 has. This is tightly pressed into the through holes 5. The compressive stress is passed on through the extensions 4 directly to the lateral surfaces 12 of the holes 2, where sealing also takes place due to the pressing, so that the holes 2 are tightly closed overall.
- the LED 9 sit with their connections 13 on a carrier plate 14 which is designed as a circuit board and with its conductor tracks produces the electrical connection of the LED 9. It is connected to a power supply and control electronics via a plug or cable connection 15.
- the backing plate 14 is provided on the back with an intermediate layer 16 and thus lies on the inside of a housing 17 which has openings 18 for the electrical connection, moldings 19 for receiving further electrical components such as monitoring or control elements and in particular cooling fins 20 on the outside ,
- the housing 17 is sealed off from the matrix plate 1 at the edge with a seal 21.
- the sealing components 3 have spacings 22 which ensure precise positioning of the carrier plate 14 and thus the LED 9 to the extensions 4 and the matrix plate 1.
- the matrix plate 1 has mechanical connections 23 to the housing 17, which ensure the distance between the housing 17 and the matrix plate 1. These are represented by screw domes, but can also be designed as welding studs or in any other way.
- the sealing components 3 are free at the positions of the mechanical connections 23.
- Matrix plate 1 and housing 17 are generally made of aluminum in order to obtain good heat balance.
- the intermediate layer 16 not only serves for electrical insulation, it also conducts the operating heat from the carrier plate 14 and in particular directly from the connections 13 to the rear wall of the housing 17. It can consist of so-called heat-conducting foam, heat-conducting paste or other relevant materials such as ceramic-filled plasters.
- the mechanical connections 23 are also highly heat-conducting in order to likewise direct the solar energy radiated onto the matrix plate 1 onto the rear wall of the housing 17.
- the cooling fins 20 are protected from solar radiation by covers 24 and well ventilated. Depending on the operating circumstances, additional cooling by means of fans can thus be dispensed with in some cases.
- the free air convection on the front 7 dissipates only a small part of the heat, in particular this cools the sun visors 8, which can heat up considerably as a result of solar radiation.
- the sun visors 8 have the best effect if they are as long as possible and at least semicircular above the LED 9. This, on the one hand, severely limits the visibility of the LED 9 from the side, but the long sun visor also covers the adjacent LED when viewed obliquely. A compromise usually has to be made here. After determining the viewing area, the arrangement of holes in the matrix plate 1 and the axial position of the LED 9, the space available for the sun visor 8 results, which should be used as much as possible. However, it is also possible to build a display with long, tubular sun visors 8, which can only be seen within a narrowly limited area.
- the design of the sun visors 8 made of gu ⁇ imi-like material has the advantage that if the sun visors 8 are improperly handled, the sun visors 8 will automatically return to their starting position.
- the module can be disassembled by loosening the mechanical connections 23.
- the carrier plate 14 is pulled out of the through holes 5 with the LEDs 9.
- special tools may be required for separation, but compressed air can also be blown in between matrix plate 1 and carrier plate 14 if gaps and openings are sufficiently sealed. A defective LED can now be replaced.
- the sealing component 3 is pressed into the matrix plate 1 with a precise fit until the base surface 6 rests.
- the through hole 5 has the outline of the LED 9, but is conically narrowed and has the narrowest point in the area of the front 7.
- the extension 4 is widened and pressed onto the lateral surfaces 12 of the holes 2, excess material of the extension 4 is mainly displaced in the direction of the front 7.
- a lubricant can be used to support the assembly. The restoring forces in the material maintain the pressure between LED 9, lateral surface 12 of the hole 2 and the extension 4.
- the tip of the LED 9 serves as a run-in slope. Slightly inclined LEDs 9 are therefore aligned when they are pressed in.
- the edges of the extensions 4 can also have a small inlet radius in order to be able to press them into the holes 2 more easily.
- Fig. 3 shows a view of the so-called "cube five arrangement, a very common and economical embodiment of a full-color display.
- Five holes are combined to form a square pixel, the pixels themselves are arranged in a square grid.
- the outline of the holes 2 is here composed of 4 arcs with the same direction of curvature, which merge seamlessly tangentially, because corners in the outline could lead to difficulties in sealing. However, circular or elliptical shapes are also suitable.
- the through holes 5 are provided for LEDs 9 with an elliptical cross section and are shifted somewhat downwards from the center so that the sun visor 8 mounted above them has sufficient wall thickness.
- the holes 2 are also somewhat widened in order to make the sun visors 8 wider, which better shade side light. This shadow effect 29 is also shown, it is the same for all light points. It can also be seen here that the wall thickness of the extensions 4 can differ to a certain extent without loss of function.
- So-called ChipLED 25 in SMD technology are provided as light sources. They are cheaper, easier and more precise to work with and emit their light in an undirected manner. You need a front lens in the form of separately produced glass bodies 11a, which can be connected in one piece to any number. Another advantage of this system is the largely free design of the glass bodies 11a, which enables requirement-specific light distributions. It is also advantageous if the ChipLED 25 are accommodated in cavities 26 of the glass body 11a, as a result of which a very small grid of the light points can be achieved with high effectiveness.
- the carrier plate 14 is also a circuit board here, but instead of a housing it is also possible to provide holding brackets 27 with a thin intermediate layer 16 for insulation. she can have molded-on cooling fins 20. The control can again take place via a plug or cable connection 15.
- the invention can be built directly into display boards such as platform displays, for example in the form of text lines. If the displays are located under a platform roof, sun visors can be omitted, but you get a relatively smooth, easy-to-clean outer surface.
- the good sealing effect of the rubber-like extensions 4 permits simple punching of the holes 2. If a multiple punch is used on a nibbling machine in a regular grid, the matrix plate 1 is produced particularly economically.
- a further advantage of a metal matrix plate is its electrical shielding - effect. Together with the housing 17 and the connections 23 or with holding pin 27, a Faraday cage results around the carrier plate 14 designed as a circuit board, which significantly increases the electrical reliability of the display module. A prerequisite for this is also an electrically conductive design of the connections 23.
- sealing components 3 allow a complete assembly of the matrix plate 1. Smaller sealing components 3 are easier to position. But a one-piece design is also conceivable, in this case the edge seal 21 can be integrated.
- the carrier plate 14 can also be divided into several plates. This not only makes the assembly process easier, it also makes it possible to better compensate for the different thermal expansions of the components.
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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)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002229384A AU2002229384A1 (en) | 2001-02-02 | 2002-02-01 | Graphic displaying module for outdoors |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT1772001 | 2001-02-02 | ||
ATA177/2001 | 2001-02-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002061714A2 true WO2002061714A2 (de) | 2002-08-08 |
WO2002061714A3 WO2002061714A3 (de) | 2007-11-15 |
Family
ID=3659226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2002/000039 WO2002061714A2 (de) | 2001-02-02 | 2002-02-01 | Modul für grafische anzeigen im freien |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU2002229384A1 (de) |
WO (1) | WO2002061714A2 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10339412A1 (de) * | 2003-08-27 | 2005-04-07 | Provi Gmbh | Vorrichtung mit dynamischer LED-Anzeige sowie mit einer Einrichtung zum Wärmeabtransport aus dem Innenraum eines Gehäuses in die Umgebung |
DE102006014800A1 (de) * | 2006-03-29 | 2007-10-04 | Insta Elektro Gmbh | LED-Modul, LED-Darstellungssystem, LED-Darstellungsanordnung, Verwendung, Verfahren |
ITMI20091562A1 (it) * | 2009-09-11 | 2011-03-12 | Marco Bertele | Schermo a led, particolarmente per ambienti da esterno. |
CN102682670A (zh) * | 2011-09-30 | 2012-09-19 | 杨东佐 | Led点阵显示屏 |
JP2015215429A (ja) * | 2014-05-09 | 2015-12-03 | 株式会社明電舎 | Led表示装置及びled表示装置の製造方法 |
FR3035735A1 (fr) * | 2015-04-29 | 2016-11-04 | Affichage Et Communication Electronique (Ace) | Procede de realisation de panneaux electroniques a messages variables a base de diodes electroluminescentes |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517846A1 (fr) * | 1981-12-07 | 1983-06-10 | Thomson Csf Mat Tel | Dispositif de visualisation etanche, et clavier de commande comportant un tel dispositif |
JPH0728415A (ja) * | 1993-07-15 | 1995-01-31 | Matsushita Electric Ind Co Ltd | Led表示器 |
JPH08320657A (ja) * | 1995-05-24 | 1996-12-03 | Sharp Corp | 表示装置およびその製造方法 |
JPH09288460A (ja) * | 1996-04-19 | 1997-11-04 | Nippon Signal Co Ltd:The | Led表示ユニット |
-
2002
- 2002-02-01 WO PCT/AT2002/000039 patent/WO2002061714A2/de not_active Application Discontinuation
- 2002-02-01 AU AU2002229384A patent/AU2002229384A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2517846A1 (fr) * | 1981-12-07 | 1983-06-10 | Thomson Csf Mat Tel | Dispositif de visualisation etanche, et clavier de commande comportant un tel dispositif |
JPH0728415A (ja) * | 1993-07-15 | 1995-01-31 | Matsushita Electric Ind Co Ltd | Led表示器 |
JPH08320657A (ja) * | 1995-05-24 | 1996-12-03 | Sharp Corp | 表示装置およびその製造方法 |
JPH09288460A (ja) * | 1996-04-19 | 1997-11-04 | Nippon Signal Co Ltd:The | Led表示ユニット |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 04, 31. Mai 1995 (1995-05-31) & JP 07 028415 A (MATSUSHITA ELECTRIC IND CO LTD), 31. Januar 1995 (1995-01-31) * |
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 04, 30. April 1997 (1997-04-30) & JP 08 320657 A (SHARP CORP;NAGOYA DENKI KOGYO KK; SEIWA DENKI KK; KOITO IND LTD; DE-SH), 3. Dezember 1996 (1996-12-03) * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 03, 27. Februar 1998 (1998-02-27) & JP 09 288460 A (NIPPON SIGNAL CO LTD:THE), 4. November 1997 (1997-11-04) * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10339412A1 (de) * | 2003-08-27 | 2005-04-07 | Provi Gmbh | Vorrichtung mit dynamischer LED-Anzeige sowie mit einer Einrichtung zum Wärmeabtransport aus dem Innenraum eines Gehäuses in die Umgebung |
DE10339412B4 (de) * | 2003-08-27 | 2005-11-10 | Provi Gmbh | Vorrichtung mit dynamischer LED-Anzeige sowie mit einer Einrichtung zum Wärmeabtransport aus dem Innenraum eines Gehäuses in die Umgebung |
DE102006014800A1 (de) * | 2006-03-29 | 2007-10-04 | Insta Elektro Gmbh | LED-Modul, LED-Darstellungssystem, LED-Darstellungsanordnung, Verwendung, Verfahren |
ITMI20091562A1 (it) * | 2009-09-11 | 2011-03-12 | Marco Bertele | Schermo a led, particolarmente per ambienti da esterno. |
WO2011029675A1 (en) * | 2009-09-11 | 2011-03-17 | Bertele Marco | A led screen, particularly for outdoor environments |
CN102682670A (zh) * | 2011-09-30 | 2012-09-19 | 杨东佐 | Led点阵显示屏 |
JP2015215429A (ja) * | 2014-05-09 | 2015-12-03 | 株式会社明電舎 | Led表示装置及びled表示装置の製造方法 |
FR3035735A1 (fr) * | 2015-04-29 | 2016-11-04 | Affichage Et Communication Electronique (Ace) | Procede de realisation de panneaux electroniques a messages variables a base de diodes electroluminescentes |
Also Published As
Publication number | Publication date |
---|---|
AU2002229384A1 (en) | 2002-08-12 |
AU2002229384A8 (en) | 2008-01-10 |
WO2002061714A3 (de) | 2007-11-15 |
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