EP2462580B1 - Light-emitting diode display device - Google Patents

Light-emitting diode display device Download PDF

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Publication number
EP2462580B1
EP2462580B1 EP10752065.2A EP10752065A EP2462580B1 EP 2462580 B1 EP2462580 B1 EP 2462580B1 EP 10752065 A EP10752065 A EP 10752065A EP 2462580 B1 EP2462580 B1 EP 2462580B1
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EP
European Patent Office
Prior art keywords
display device
translucent
holes
light
film
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EP10752065.2A
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German (de)
French (fr)
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EP2462580A1 (en
Inventor
Maurice Gorgy
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Gorgy Timing
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Gorgy Timing
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Publication of EP2462580A1 publication Critical patent/EP2462580A1/en
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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
    • G09F9/33—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
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent

Definitions

  • the present invention relates to the field of LED display devices.
  • Display devices which comprise a front plate having a plurality of through holes and a support plate disposed rearward of the front plate and carrying a plurality of light-emitting diodes arranged in correspondence with the through holes of the front plate for transmitting light forward.
  • the document GB-A-2,280,534 discloses a display device in which the front plate is covered with a black layer, except vis-à-vis the through holes.
  • the patent US 2005/265029 discloses a structure which comprises, in front of the light-emitting diodes, a light-guiding layer which has on its front face annular zones (24) placed around and at a distance from the diodes. These areas are used to reflect the light backwards, so that it is then reflected forward.
  • the present invention aims to reduce or mitigate this visibility.
  • a display device which may comprise a front plate having a plurality of through holes, a support plate disposed behind the front plate and carrying a plurality of light-emitting diodes arranged in correspondence with the through holes of the front plate to emit light forward, and a translucent front film placed on the front face of the front plate and passing in front of the through holes of this front plate, a face of the translucent front film carrying a regular frame of a darkening pattern, this regular frame extending in front of said through holes (6) and opposite the remaining portions of the front face of said support plate (4).
  • Each obscuration pattern may cover a surface smaller than the section of each of said through holes, and the obscuration patterns may be distributed in a matrix whose pitch is smaller than the diameter of said through holes.
  • Said frame can be formed on the rear face of the film before translucent.
  • Said translucent front film may carry a frame of a dot pattern distributed in a matrix.
  • Said frame may have a coverage ratio of between 10 and 60%.
  • Said translucent front film may have a matte anti-reflective front face.
  • the translucent front film may have a shiny back side.
  • Said translucent front film may carry a screen of a screen printing ink.
  • the degree of light transmission through the translucent front film 10 can be between 80% and 95% and the degree of light transmission through the translucent front film and the weft can be between 10% and 60%
  • Said translucent film can be glued to the front face of the front plate by a transparent glue.
  • the light-emitting diodes may be formed by surface-mounted semiconductor electronic components on said support plate, said through holes forming waveguide guides.
  • the thickness of the translucent front film may be between 0.05 times and 0.2 times the thickness of the backing plate.
  • Said support plate may be a printed circuit board in contact with or at a short distance from the rear face of the front plate.
  • a display device 1 comprises a non-transparent, preferably opaque, front plate 2 which has a plurality of through-holes 3, and a support plate 4, for example a printed circuit board, arranged behind the front plate 2.
  • the front face 5 of the support plate 4 may be in contact or at a short distance from the rear face 6 of the front plate 2.
  • the peripheral portion of the front plate 2 may be attached to a peripheral wall of a housing, not shown, open at the front, and the peripheral portion of the support plate 4 may be attached to the front plate. 2 by screws, not shown, possibly with the interposition of spacer washers, not shown.
  • the support plate 4 carries, on its front face 5, a plurality of light-emitting diodes 7, advantageously formed by surface-mounted semiconductor electronic components, arranged in correspondence with the through-holes 3 of the front plate 2, in order to to emit light forward in the form of light spots corresponding approximately to the through holes 3.
  • the light-emitting diodes 7 are placed in the middle of the through-holes 3 and may be slightly engaged in the through-holes 3.
  • the holes through-holes 3 form guides towards the front of the light wave emitted by the light-emitting diodes 7.
  • the light-emitting diodes 7 are connected, by means of the printed circuit of the front face 5 of the support plate 4 and connection means schematized by a line 9, to an electronic supply device 8, for example placed behind of the support plate 4, in the aforementioned housing.
  • the electronic feeding device 8 can be programmed so that at least some of the light-emitting diodes 7 can be selectively switched on and off according to a program.
  • the display device 1 further comprises a front film 10 of a translucent or diaphanous material, which is disposed on the front face 11 of the front plate 2 and which therefore passes in front of the through holes 3 of the front plate 2, without the light-emitting diodes 7 do not touch it.
  • the translucent or diaphanous nature of the front film 10 makes it possible to attenuate the visibility from the front of the through holes 3, without unduly affecting the passage of the light emitted by the light-emitting diodes 7, in particular the visibility of the light-emitting diodes 7 extinguished and corresponding parts of the front face 5 of the support plate 4 relative to the light emitting diodes 7 lit.
  • the front translucent film 10 carries on one side, for example on its rear face, a regular frame 12 of a darkening pattern 13, greatly enlarged in this figure, to further reduce the visibility from the front of the through holes 3, more particularly the visibility of the edges of the through holes 3, again without unduly impairing the passage of the light emitted by the light emitting diodes 7 on.
  • the regular frame 12 extends vis-a-vis the through-holes 6 and opposite the remaining parts of the front face of the support plate 4.
  • each obscuration pattern 13 covers a surface smaller than the cross section of each of the through holes 6 and the obscuration patterns 13 are distributed in a matrix whose pitch is smaller than the diameter of said through holes 6.
  • the display device 1 may be as follows.
  • the front plate 2 may have a thickness of between three and eight millimeters.
  • the through holes 3 may be cylindrical or slightly cone-shaped open towards the front and have a mean diameter of between four and twenty millimeters.
  • the translucent front film 10 may have a thickness of between ten and fifty hundredths of a millimeter.
  • the weft 12 may be of an opaque or translucent material and may be obtained by screen printing, for example an ink which may be diluted.
  • the translucent front film 10 may carry a frame 12 of a dot pattern 13 regularly distributed in the form of a matrix.
  • the display device 1 may be as follows.
  • the back side of the translucent front film 10 can be shiny, while its front side can be matte or anti-reflective.
  • the display device 1 may be particularly suitable for displaying or presenting fixed or variable information, in particular for displaying dates and forming a light clock.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Description

La présente invention concerne le domaine des dispositifs d'affichage à diodes électroluminescentes.The present invention relates to the field of LED display devices.

On connaît des dispositifs d'affichage qui comprennent une plaque avant présentant une pluralité de trous traversants et une plaque-support disposée en arrière de la plaque avant et portant une pluralité de diodes électroluminescentes disposées en correspondance avec les trous traversants de la plaque avant pour émettre de la lumière vers l'avant.Display devices are known which comprise a front plate having a plurality of through holes and a support plate disposed rearward of the front plate and carrying a plurality of light-emitting diodes arranged in correspondence with the through holes of the front plate for transmitting light forward.

Le document GB-A-2 280 534 décrit un dispositif d'affichage dans lequel la plaque avant est recouverte d'une couche noire, sauf en vis-à-vis des trous traversants.The document GB-A-2,280,534 discloses a display device in which the front plate is covered with a black layer, except vis-à-vis the through holes.

Le brevet US 2005/265029 décrit une structure qui comprend, en avant des diodes électroluminescentes, une couche de guidage de lumière qui présente sur sa face avant des zones annulaires (24) placées autour et à distance des diodes. Ces zones servent à réfléchir la lumière vers l'arrière, pour qu'elle soit ensuite réfléchie vers l'avant.The patent US 2005/265029 discloses a structure which comprises, in front of the light-emitting diodes, a light-guiding layer which has on its front face annular zones (24) placed around and at a distance from the diodes. These areas are used to reflect the light backwards, so that it is then reflected forward.

Dans de tels dispositifs d'affichage, une des difficultés réside dans la visibilité des trous dans la plaque avant et des diodes électroluminescentes éteintes par rapport aux diodes électroluminescentes allumées.In such display devices, one of the difficulties lies in the visibility of the holes in the front plate and the light-emitting diodes turned off relative to the light-emitting diodes lit.

La présente invention a pour but de réduire ou atténuer cette visibilité.The present invention aims to reduce or mitigate this visibility.

Pour cela, il est proposé un dispositif d'affichage qui peut comprendre une plaque avant présentant une pluralité de trous traversants, une plaque-support disposée en arrière de la plaque avant et portant une pluralité de diodes électroluminescentes disposées en correspondance avec les trous traversants de la plaque avant pour émettre de la lumière vers l'avant, et un film avant translucide placé sur la face avant de la plaque avant et passant devant les trous traversants de cette plaque avant, une face du film avant translucide portant une trame régulière d'un motif d'obscurcissement, cette trame régulière s'étendant en vis-à-vis desdits trous traversants (6) et en vis-à-vis des parties restantes de la face avant de ladite plaque-support (4).For this, there is provided a display device which may comprise a front plate having a plurality of through holes, a support plate disposed behind the front plate and carrying a plurality of light-emitting diodes arranged in correspondence with the through holes of the front plate to emit light forward, and a translucent front film placed on the front face of the front plate and passing in front of the through holes of this front plate, a face of the translucent front film carrying a regular frame of a darkening pattern, this regular frame extending in front of said through holes (6) and opposite the remaining portions of the front face of said support plate (4).

Chaque motif d'obscurcissement peut couvrir une surface inférieure à la section de chacun desdits trous traversants et les motifs d'obscurcissement peuvent être répartis selon une matrice dont le pas est inférieur au diamètre desdits trous traversants.Each obscuration pattern may cover a surface smaller than the section of each of said through holes, and the obscuration patterns may be distributed in a matrix whose pitch is smaller than the diameter of said through holes.

Ladite trame peut être formée sur la face arrière du film avant translucide.Said frame can be formed on the rear face of the film before translucent.

Ledit film avant translucide peut porter une trame d'un motif de points répartis selon une matrice.Said translucent front film may carry a frame of a dot pattern distributed in a matrix.

Ladite trame peut présenter un taux de couverture compris entre 10 et 60%.Said frame may have a coverage ratio of between 10 and 60%.

Ledit film avant translucide peut présenter une face avant mate anti-reflets.Said translucent front film may have a matte anti-reflective front face.

Ledit film avant translucide peut présenter une face arrière brillante.The translucent front film may have a shiny back side.

Ledit film avant translucide peut porter une trame d'une encre de sérigraphie.Said translucent front film may carry a screen of a screen printing ink.

Le degré de transmission lumineuse au travers du film avant translucide 10 peut être compris entre 80% et 95% et le degré de transmission lumineuse au travers du film avant translucide et la trame peut être compris entre 10% et 60%The degree of light transmission through the translucent front film 10 can be between 80% and 95% and the degree of light transmission through the translucent front film and the weft can be between 10% and 60%

Ledit film translucide peut être collé sur la face avant de la plaque avant par une colle transparente.Said translucent film can be glued to the front face of the front plate by a transparent glue.

Lesdites diodes électroluminescentes peuvent être formées par des composants électroniques semi-conducteurs montés en surface sur ladite plaque-support, lesdits trous traversants formant des guides de l'onde lumineuse.The light-emitting diodes may be formed by surface-mounted semiconductor electronic components on said support plate, said through holes forming waveguide guides.

L'épaisseur du film avant translucide peut être comprise entre 0,05 fois et 0,2 fois l'épaisseur de la plaque-support.The thickness of the translucent front film may be between 0.05 times and 0.2 times the thickness of the backing plate.

Ladite plaque-support peut être une plaque de circuit imprimé en contact sur ou à faible distance de la face arrière de la plaque avant.Said support plate may be a printed circuit board in contact with or at a short distance from the rear face of the front plate.

Un dispositif d'affichage à diodes électroluminescentes va maintenant être décrit à titre d'exemple non limitatif, illustré par le dessin annexé sur lequel :

  • la figure 1 représente une coupe d'un dispositif d'affichage ; et
  • la figure 2 représente une vue agrandie d'une trame d'un motif d'obscurcissement.
A light-emitting diode display device will now be described by way of non-limiting example, illustrated by the appended drawing in which:
  • the figure 1 represents a section of a display device; and
  • the figure 2 is an enlarged view of a frame of a darkening pattern.

Comme le montre la figure 1, un dispositif d'affichage 1 comprend une plaque avant 2 non transparente, de préférence opaque, qui présente une pluralité de trous traversants 3, et une plaque-support 4, par exemple une plaque de circuits imprimés, disposée en arrière de la plaque avant 2. La face avant 5 de la plaque-support 4 peut être en contact ou à faible distance de la face arrière 6 de la plaque avant 2.As shown in figure 1 , a display device 1 comprises a non-transparent, preferably opaque, front plate 2 which has a plurality of through-holes 3, and a support plate 4, for example a printed circuit board, arranged behind the front plate 2. The front face 5 of the support plate 4 may be in contact or at a short distance from the rear face 6 of the front plate 2.

Selon un exemple, la partie périphérique de la plaque avant 2 peut être fixée à une paroi périphérique d'un boîtier, non représenté, ouvert à l'avant, et la partie périphérique de la plaque-support 4 peut être fixée à la plaque avant 2 par des vis, non représentées, avec éventuellement interposition de rondelles d'écartement, non représentées.In one example, the peripheral portion of the front plate 2 may be attached to a peripheral wall of a housing, not shown, open at the front, and the peripheral portion of the support plate 4 may be attached to the front plate. 2 by screws, not shown, possibly with the interposition of spacer washers, not shown.

La plaque-support 4 porte, sur sa face avant 5, une pluralité de diodes électroluminescentes 7, avantageusement formées par des composants électroniques semi-conducteurs montés en surface, disposées en correspondance avec les trous traversants 3 de la plaque avant 2, afin d'émettre de la lumière vers l'avant sous forme de points lumineux correspondant approximativement aux trous traversants 3. Par exemple, les diodes électroluminescentes 7 sont placées au milieu des trous traversants 3 et peuvent être légèrement engagées dans les trous traversants 3. Avantageusement, les trous traversants 3 forment des guides vers l'avant de l'onde lumineuse émise par les diodes électroluminescentes 7.The support plate 4 carries, on its front face 5, a plurality of light-emitting diodes 7, advantageously formed by surface-mounted semiconductor electronic components, arranged in correspondence with the through-holes 3 of the front plate 2, in order to to emit light forward in the form of light spots corresponding approximately to the through holes 3. For example, the light-emitting diodes 7 are placed in the middle of the through-holes 3 and may be slightly engaged in the through-holes 3. Advantageously, the holes through-holes 3 form guides towards the front of the light wave emitted by the light-emitting diodes 7.

Les diodes électroluminescentes 7 sont reliées, par l'intermédiaire du circuit imprimé de la face avant 5 de la plaque-support 4 et de moyens de connexion schématisés par une ligne 9, à un dispositif électronique d'alimentation 8, par exemple placé en arrière de la plaque-support 4, dans le boîtier précité. Le dispositif électronique d'alimentation 8 peut être programmé pour qu'au moins certaines des diodes électroluminescentes 7 puissent être sélectivement allumées et éteintes selon un programme.The light-emitting diodes 7 are connected, by means of the printed circuit of the front face 5 of the support plate 4 and connection means schematized by a line 9, to an electronic supply device 8, for example placed behind of the support plate 4, in the aforementioned housing. The electronic feeding device 8 can be programmed so that at least some of the light-emitting diodes 7 can be selectively switched on and off according to a program.

Le dispositif d'affichage 1 comprend en outre un film avant 10 en une matière translucide ou diaphane, qui est disposé sur la face avant 11 de la plaque avant 2 et qui par conséquent passe devant les trous traversants 3 de la plaque avant 2, sans que les diodes électroluminescentes 7 ne le touchent.The display device 1 further comprises a front film 10 of a translucent or diaphanous material, which is disposed on the front face 11 of the front plate 2 and which therefore passes in front of the through holes 3 of the front plate 2, without the light-emitting diodes 7 do not touch it.

Le caractère translucide ou diaphane du film avant 10 permet d'atténuer la visibilité par l'avant des trous traversants 3, sans nuire de façon exagérée au passage de la lumière émise par les diodes électroluminescentes 7 allumées, plus particulièrement la visibilité des diodes électroluminescentes 7 éteintes et des parties correspondantes de la face avant 5 de la plaque-support 4 par rapport aux diodes électroluminescentes 7 allumées.The translucent or diaphanous nature of the front film 10 makes it possible to attenuate the visibility from the front of the through holes 3, without unduly affecting the passage of the light emitted by the light-emitting diodes 7, in particular the visibility of the light-emitting diodes 7 extinguished and corresponding parts of the front face 5 of the support plate 4 relative to the light emitting diodes 7 lit.

Comme le montre la figure 2, le film avant translucide 10 porte sur une face, par exemple sur sa face arrière, une trame régulière 12 d'un motif d'obscurcissement 13, très agrandie sur cette figure, permettant de réduire encore la visibilité par l'avant des trous traversants 3, plus particulièrement la visibilité des bords des trous traversants 3, là encore sans nuire de façon exagérée au passage de la lumière émise par les diodes électroluminescentes 7 allumées.As shown in figure 2 , the front translucent film 10 carries on one side, for example on its rear face, a regular frame 12 of a darkening pattern 13, greatly enlarged in this figure, to further reduce the visibility from the front of the through holes 3, more particularly the visibility of the edges of the through holes 3, again without unduly impairing the passage of the light emitted by the light emitting diodes 7 on.

La trame régulière 12 s'étend en vis-à-vis des trous traversants 6 et en vis-à-vis des parties restantes de la face avant de la plaque-support 4.The regular frame 12 extends vis-a-vis the through-holes 6 and opposite the remaining parts of the front face of the support plate 4.

Selon une variante de réalisation, chaque motif d'obscurcissement 13 couvre une surface inférieure à la section de chacun des trous traversants 6 et les motifs d'obscurcissement 13 sont répartis selon une matrice dont le pas est inférieur au diamètre desdits trous traversants 6.According to an alternative embodiment, each obscuration pattern 13 covers a surface smaller than the cross section of each of the through holes 6 and the obscuration patterns 13 are distributed in a matrix whose pitch is smaller than the diameter of said through holes 6.

A titre d'exemple, le dispositif d'affichage 1 peut être comme suit.By way of example, the display device 1 may be as follows.

La plaque avant 2 peut présenter une épaisseur comprise entre trois et huit millimètres.The front plate 2 may have a thickness of between three and eight millimeters.

Les trous traversants 3 peuvent être cylindriques ou légèrement en forme de troncs de cône ouverts vers l'avant et présenter un diamètre moyen compris entre quatre et vingt millimètres.The through holes 3 may be cylindrical or slightly cone-shaped open towards the front and have a mean diameter of between four and twenty millimeters.

Le film avant translucide 10 peut présenter une épaisseur comprise entre dix et cinquante centièmes de millimètre.The translucent front film 10 may have a thickness of between ten and fifty hundredths of a millimeter.

La trame 12 peut être en une matière opaque ou translucide et peut être obtenue par sérigraphie par exemple d'une encre qui peut être diluée.The weft 12 may be of an opaque or translucent material and may be obtained by screen printing, for example an ink which may be diluted.

Le film avant translucide 10 peut porter une trame 12 d'un motif de points 13 régulièrement répartis sous forme d'une matrice.The translucent front film 10 may carry a frame 12 of a dot pattern 13 regularly distributed in the form of a matrix.

Le taux de couverture de la trame 12 peut être compris entre 10% et 60%The coverage rate of the frame 12 can be between 10% and 60%

Le degré de transmission lumineuse au travers du film avant translucide 10 peut être compris entre 80% et 95%.The degree of light transmission through the translucent front film 10 can range from 80% to 95%.

Le degré de transmission lumineuse au travers du film avant translucide anti-reflets 10 et la trame 12 peut être compris entre zéro et 60%The degree of light transmission through the translucent anti-reflective front film 10 and the frame 12 can be between zero and 60%

Selon une réalisation particulière donnée uniquement à titre d'exemple, le dispositif d'affichage 1 peut être comme suit.According to a particular embodiment given solely by way of example, the display device 1 may be as follows.

L'épaisseur du film avant translucide 10 peut être comprise entre 0,05 fois et 0,2 fois l'épaisseur de la plaque-support 4. En particulier, la plaque avant 2 peut présenter une épaisseur comprise entre 2 et 8 millimètres et être par exemple en gris foncé et le film avant translucide 10 peut présenter une épaisseur comprise entre 20 et 50 centièmes de millimètre.The thickness of the translucent front film 10 may be between 0.05 times and 0.2 times the thickness of the support plate 4. In particular, the front plate 2 may have a thickness of between 2 and 8 millimeters and be for example in dark gray and the translucent front film 10 may have a thickness of between 20 and 50 hundredths of a millimeter.

Les trous traversants 3 peuvent présenter un diamètre moyen compris entre 2 et 10 millimètres.The through holes 3 may have an average diameter of between 2 and 10 millimeters.

Le taux de couverture de la trame 12 peut être comprise de 10 à 60%. Les points ou autres motifs de cette trame peuvent être disposés selon un pas compris entre 1 et 2 millimètres et leur diamètre peut être compris entre 0,5 et 1,5 millimètres.The coverage rate of the frame 12 can be from 10 to 60%. The dots or other patterns of this frame may be arranged in a pitch of between 1 and 2 millimeters and their diameter may be between 0.5 and 1.5 millimeters.

Ainsi, comme le montre la figure 2, plusieurs points 13 peuvent être disposés en vis-à-vis des trous traversants 3, en laissant des espaces non recouverts en vis-à-vis des trous traversants 3.So, as shown in figure 2 several points 13 may be arranged opposite the through holes 3, leaving gaps not covered vis-à-vis the through holes 3.

Le degré de transmission lumineuse au travers du film avant translucide 10 peut être compris entre 80% et 90%.The degree of light transmission through the translucent front film 10 can be between 80% and 90%.

Le degré de transmission lumineuse au travers du film avant translucide 10 et la trame 12 peut être compris entre 30% et 60%.The degree of light transmission through the translucent front film 10 and the weft 12 may be between 30% and 60%.

La trame 12 peut être formée par une encre de sérigraphie diluée, dont la dilution est comprise entre 40 et 60 %.The weft 12 may be formed by a diluted serigraphy ink, the dilution of which is between 40 and 60%.

La face arrière du film avant translucide 10 peut être brillante, tandis que sa face avant peut être mate ou anti-reflets.The back side of the translucent front film 10 can be shiny, while its front side can be matte or anti-reflective.

Le film avant translucide 10 peut être fixé sur la face avant 11 de la plaque avant 2 par l'intermédiaire d'une fine couche de colle transparente appliquée sur cette plaque avant.The translucent front film 10 can be fixed on the front face 11 of the front plate 2 by means of a thin layer of transparent adhesive applied to this front plate.

La plaque avant 2 peut être par exemple en PVC et le film avant translucide 10, qui constitue en outre une protection, peut être par exemple en un polycarbonate assez difficilement rayable.The front plate 2 may be for example PVC and the translucent front film 10, which is also a protection, may be for example a polycarbonate rather difficult to scratch.

Le dispositif d'affichage 1 peut être particulièrement adapté pour l'affichage ou la présentation d'informations fixes ou variables, en particulier pour afficher les dates et former une horloge lumineuse.The display device 1 may be particularly suitable for displaying or presenting fixed or variable information, in particular for displaying dates and forming a light clock.

La présente invention ne se limite pas aux exemples ci-dessus décrits. Des variantes de réalisation sont possibles sans sortir du cadre défini par les revendications annexées.The present invention is not limited to the examples described above. Alternative embodiments are possible without departing from the scope defined by the appended claims.

Claims (12)

  1. Display device comprising:
    a front plate (2) having a plurality of through-holes (3),
    a support plate (4) arranged behind the front plate and bearing a plurality of light-emitting diodes (7) arranged connected with the through-holes of the front plate to emit light forwards,
    and a translucent front film (10) placed on the front face of the front plate and passing in front of the through-holes of this front plate,
    characterized in that a face of the translucent front film bears a regular raster (12) of an obscuring pattern, this regular raster extending facing said through-holes (6) and facing the remaining parts of the front face of said support plate (4), and in which each obscuring pattern (13) covers a surface area less than the section of each of said through-holes (6) and the obscuring patterns (13) are distributed according to a matrix whose pitch is less than the diameter of said through-holes (6).
  2. Display device according to Claim 1, in which said raster is formed on the rear face of the translucent front film.
  3. Display device according to one of the preceding claims, in which the translucent front film bears a raster of a pattern of dots distributed according to a matrix.
  4. Display device according to any one of the preceding claims, in which said raster exhibits a coverage rate of between 10 and 60%.
  5. Display device according to any one of the preceding claims, in which the translucent front film has an anti-glare matt front face.
  6. Display device according to any one of the preceding claims, in which the translucent front film has a glossy rear face.
  7. Display device according to any one of the preceding claims, in which the translucent front film bears a raster of a screen-printing ink.
  8. Display device according to any one of the preceding claims, in which the degree of light transmission through the translucent front film 10 lies between 80% and 95% and the degree of light transmission through the translucent front film and the raster lies between 10% and 60%.
  9. Display device according to any one of the preceding claims, in which the translucent film is glued onto the front face of the front plate by a transparent glue.
  10. Display device according to any one of the preceding claims, in which said light-emitting diodes (7) are formed by semiconductive electronic components surface-mounted on said support plate (4), said through-holes (3) forming light waveguides.
  11. Display device according to any one of the preceding claims, in which the thickness of the translucent front film (10) lies between 0.05 times and 0.2 times the thickness of the support plate (4).
  12. Display device according to any one of the preceding claims, in which the support plate is a printed circuit board in contact on or at a short distance from the rear face of the front plate.
EP10752065.2A 2009-08-07 2010-07-21 Light-emitting diode display device Not-in-force EP2462580B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0955562A FR2949019B1 (en) 2009-08-07 2009-08-07 ELECTROLUMINESCENT DIODE DISPLAY DEVICE
PCT/FR2010/051539 WO2011015757A1 (en) 2009-08-07 2010-07-21 Light-emitting diode display device

Publications (2)

Publication Number Publication Date
EP2462580A1 EP2462580A1 (en) 2012-06-13
EP2462580B1 true EP2462580B1 (en) 2016-07-06

Family

ID=41478868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10752065.2A Not-in-force EP2462580B1 (en) 2009-08-07 2010-07-21 Light-emitting diode display device

Country Status (3)

Country Link
EP (1) EP2462580B1 (en)
FR (1) FR2949019B1 (en)
WO (1) WO2011015757A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112614440A (en) * 2020-12-23 2021-04-06 惠州市艾比森光电有限公司 LED display module and LED display screen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280534B (en) * 1993-07-30 1997-04-16 Koito Mfg Co Ltd Display device
EP0897172A3 (en) * 1997-08-11 1999-12-08 Vossloh MAN Systemelektronik GmbH Display device for informations and their use and method of manufacture
US7284881B2 (en) * 2004-03-31 2007-10-23 Ledo Co., Ltd. LED fixing device of a pixel module and method for manufacturing the same
US7997771B2 (en) * 2004-06-01 2011-08-16 3M Innovative Properties Company LED array systems

Also Published As

Publication number Publication date
WO2011015757A1 (en) 2011-02-10
FR2949019B1 (en) 2012-06-08
FR2949019A1 (en) 2011-02-11
EP2462580A1 (en) 2012-06-13

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