EP1122984A2 - Panneau d'affichage électroluminescent en couleur à longue durée de vie - Google Patents

Panneau d'affichage électroluminescent en couleur à longue durée de vie Download PDF

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Publication number
EP1122984A2
EP1122984A2 EP00305900A EP00305900A EP1122984A2 EP 1122984 A2 EP1122984 A2 EP 1122984A2 EP 00305900 A EP00305900 A EP 00305900A EP 00305900 A EP00305900 A EP 00305900A EP 1122984 A2 EP1122984 A2 EP 1122984A2
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EP
European Patent Office
Prior art keywords
sub
display panel
electrodes
electrode
electroluminescent display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00305900A
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German (de)
English (en)
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EP1122984A3 (fr
Inventor
Shaw-Jong Wang
Chi-Jung Shen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ritek Corp
Original Assignee
Ritek Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ritek Corp filed Critical Ritek Corp
Publication of EP1122984A2 publication Critical patent/EP1122984A2/fr
Publication of EP1122984A3 publication Critical patent/EP1122984A3/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode

Definitions

  • This invention relates to a long-life type colorful electroluminescent (EL) display panel and more particularly to an EL display panel that has an electrode structure capable of increasing life span and making the display panel colorful.
  • EL electroluminescent
  • the so-called electroluminescent (EL) display panel mainly comprises a transparent substrate, a transparent electrode formed on the transparent substrate, a luminescent laminate, and a biasing electrode formed on the luminescent laminate opposite to the transparent electrode.
  • a display surface is usually arranged on the surface of the transparent substrate opposite to the transparent electrode. The display surface is usually provided with a pattern.
  • the EL display panel has a specific life span. In case the EL display panel is broken down, a replacement with a new- EL display panel could be necessary. However, a procedure for such a replacement is more or less troublesome. Thus, how to increase the life span of the EL display panel would be a project.
  • An object of this invention is to provide an electroluminescent display panel having a life span longer than that of a conventional EL display panel.
  • the other object of this invention is to provide an electroluminescent display panel capable of presenting a colorful pattern.
  • an electroluminescent display panel comprises a luminescent laminate, two electrodes located at the two sides of the luminescent laminate, several terminals respectively connected to the two electrodes, and a display surface at one side of one of the two electrodes opposite to the luminescent laminate, and is characterized in that one of the two electrodes includes plural separated sub-electrodes, each sub-electrode comprises at least one branch portion and a bus bar connecting at least one branch portion to one of the terminals, each of the branch portions of the sub-electrodes is accompanied with one branch portion in a different sub-electrode and extends in parallel thereto in a position corresponding to a portion of the display surface which is representative of substantially the same area.
  • each sub-electrode has one branch portion extending to a position corresponding to a portion of the display surface which is representative of substantially the same area, i.e., substantially the same area can present light by means of the plural sub-electrodes, as well as their respectively corresponding luminescent material, which are actuated one by one, the life span of the EL display panel will increase. Moreover, if the plural sub-electrodes are actuated by electric powers at different frequencies, substantially the same area will present plural colors, and thus a colorful EL display panel is obtainable. Furthermore, if each sub-electrode is actuated one by one at a specific time interval, substantially the same area will present an effect like a neon lamp. Further, if the colors of the lights each emitted by the luminescent material corresponding to one of the sub-electrodes are different, the neon effect will be more colorful.
  • Fig. 1 illustrates a schematic plan view of one of the electrodes of an EL display panel according to the first embodiment of this invention.
  • Fig. 2 illustrates a schematic plan view of the electrode structure in Fig. 1 incorporated with a display surface having two patterns in substantially the same area.
  • Fig. 3 illustrates a schematic view similar to Fig. 2 except for the two patterns.
  • Fig. 4 illustrates an exploded schematic view of the EL display panel according to the second embodiment of this invention.
  • Fig. 1 illustrates a schematic plan view of one of the electrodes of an EL display panel according to the first embodiment of this invention.
  • One of the electrodes can be either a biasing electrode or a transparent electrode.
  • the electrode 1 comprises a first sub-electrode 10 and a second sub-electrode 20.
  • the first sub-electrode 10 includes a group of separated branch portions 11 in parallel formation extending in a specific area and a bus bar 19 connecting each branch portion 11 to a first terminal (no shown).
  • the second sub-electrode 20 includes a group of branch portions 21, parallel to each other, extending in an area substantially identical to the aforesaid specific area and a bus bar 29 connecting each branch portion 21 to a second terminal (not shown).
  • Each pair of the branch portions 11 in the first sub-electrode 10 are interleaved with one branch portion 21 in the second sub-electrode 20. All the branch portions 11 in the first sub-electrode 10 are combined by the bus bar 19 on one side opposite to the bus bar 29 by which the branch portions 21 of the second sub-electrode 20 are combined.
  • the two sub-electrodes 10 and 20 could be deemed to be located at substantially the same lighting area.
  • the portion of the luminescent laminate corresponding to the first sub-electrode 10 is expired, the second sub-electrode 20 which is located in substantially the same lighting area could be actuated so as to excite substantially the same lighting area. Consequently, the life span of the EL display panel could double and the display panel is still available.
  • the first sub-electrode 10 can be biased by an electric power at a first frequency while the second sub-electrode 20 can be biased by an electric power at a second frequency different to the first frequency.
  • the luminescent laminate can luminesce with different colors based upon the frequencies of the electric powers to be applied, the luminescing light of the EL display panel will be colorful if the two sub-electrodes 10 and 20 are simultaneously or succeedingly biased by the two electric powers of different frequencies. For example, the light of a yellow color or of a red color can be simultaneously or succeedingly generated.
  • each of the first and the second sub-electrodes 10 and 20 has only one branch portion so as to present a line pattern represented in substantially the same area.
  • Fig. 2 illustrates a schematic plan view of the electrode structure shown in Fig. 1 incorporated with a display surface having two patterns in substantially the same area.
  • substantially the same area of the display surface 2 of the EL display panel contains a first pattern A (shown as "A”) and a second pattern B (shown as "a") which overlap in terms of substantially the same area but offset in terms of each pattern element thereof.
  • each of the first pattern A and the second pattern B is composed of a group of separated longitudinal pattern segments in parallel, and each pair of the pattern segments in one group are interleaved with one pattern segment in the other group.
  • the branch portions 11 of the first sub-electrode 10 respectively correspond to the pattern segments of the first pattern A while the branch portions 21 of the second sub-electrode 20 respectively correspond to the pattern segments of the second pattern B.
  • the patterns A and B could be two related patterns such as those shown in Fig. 3 which show dog heads of facing different directions respectively.
  • the display surface 2' will present a swing action of the dog head.
  • a continuously changing effect like animation could be obtainable if such sub-electrodes are actuated in sequence.
  • a diffusion plate (not shown) can be disposed on the display surface 2 or 2' so as to smooth the lines in each pattern.
  • the above structure relates to a situation where the branch portions and the bus bar of each sub-electrode are located at a same laminating level.
  • the branch portions and the bus bar can be disposed at different laminating levels as illustrated in the following embodiment in which the quantity of the sub-electrodes could be more than two.
  • Fig. 4 shows an exploded schematic view of the EL display panel according to the second embodiment of this invention.
  • the EL display panel 30 according to the second embodiment of this invention mainly comprises a transparent laminate 31 including a transparent substrate and a transparent electrode, a luminescent laminate 32, a biasing electrode laminate including a branch layer 33, an insulating layer 34, and a bus bar layer 35, and a protecting layer 36, all of them being laminated in sequence.
  • the luminescent laminate 32 is constructed by three kinds of materials 32a, 32b, and 32c, each being capable of emitting a specific color under bias. Each kind of luminescent material is divided into a plurality of pattern segments parallel to each other. Each pair of pattern segments in the same kind of luminescent material, for example 32a, are interleaved with one pattern segment of the other two kinds of luminescent materials, for example 32b and 32c.
  • the biasing electrode laminate includes three sub-electrodes. The three sub-electrodes respectively comprise plural branch portions 33a, 33b, 33c located in the branch layer 33, plural vias 34a, 34b, 34c located in the insulating layer 34, and a bus bar 35a, 35b, 35c located in the bus bar layer 35.
  • each-pair of branch portions of each sub-electrode for example 33a, are interleaved with one branch portion of the other two sub-electrodes such as 33b and 33c such that all branch portions respectively belonging to the three sub-electrodes are distributed at substantially the same area of the display surface, such as the pattern of "S" and that each branch portion corresponds to one pattern segment.
  • the insulating layer 34 is formed with many vias which are separated into three sets 34a, 34b, and 34c. Each via corresponds to one branch portion that belongs to the sub-electrode corresponding to the set of the via.
  • the bus bar layer 35 is laminated on the insulating layer 34 and includes three bus bars 35a, 35b, and 35c constructed by silver glue, each belonging to one sub-electrode and being connected to one terminal (not shown).
  • Each bus bar, for example 35a can be connected to its corresponding branch portion, for example 33a, belonging to a same sub-electrode, through the corresponding via, for example 34a, so as to supply electric power to each branch portion, for example 33a.
  • the bus bar layer 35 can be constructed by any proper conductive material in addition to the silver glue.
  • the protecting layer 36 is laminated over the whole biasing electrode laminate so as to protect the biasing electrode. However, it is optional.
  • substantially the same area could contain an arbitrary number of sub-electrodes, and such sub-electrodes can be biased by any measure illustrated in the above.
  • each of the branch portions illustrated in the second embodiment can be of a circle shape or a dot. They can be supplied with electric power group by group by the bus bars respectively. Thus, by virtue of the arrangement of such dots, the presented pattern would be more smooth and colorful.
EP00305900A 2000-02-04 2000-07-12 Panneau d'affichage électroluminescent en couleur à longue durée de vie Withdrawn EP1122984A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN00201695U CN2431574Y (zh) 2000-02-04 2000-02-04 可多彩化长寿型冷光片
CN00201695 2000-02-04

Publications (2)

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EP1122984A2 true EP1122984A2 (fr) 2001-08-08
EP1122984A3 EP1122984A3 (fr) 2003-02-12

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EP00305900A Withdrawn EP1122984A3 (fr) 2000-02-04 2000-07-12 Panneau d'affichage électroluminescent en couleur à longue durée de vie

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EP (1) EP1122984A3 (fr)
CN (1) CN2431574Y (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2437113A (en) * 2006-04-12 2007-10-17 Cambridge Display Tech Ltd Light-emissive display and method of manufacturing the same
DE102006039789A1 (de) * 2006-08-24 2008-02-28 Siemens Ag Flächiges Leuchtelement sowie Verwendung des flächigen Leuchtelementes
WO2009103171A1 (fr) * 2008-02-18 2009-08-27 Sst Smart Surface Technology Ag Dispositif électroluminescent et son procédé de fabrication
DE102007006346B4 (de) * 2006-02-15 2017-10-12 Osram Oled Gmbh Weiße Doppelemissions-PLED für Beleuchtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359031A (zh) * 2014-11-12 2015-02-18 苏州思莱特电子科技有限公司 一种发光板

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075122A (en) * 1960-05-02 1963-01-22 Westinghouse Electric Corp Electroluminescent system, electrically non-linear element and method
DE3802318A1 (de) * 1988-01-27 1989-08-03 Beck Gerhard Dipl Ing Fh Lumineszierendes substrat
DE3802317A1 (de) * 1988-01-27 1989-08-03 Beck Gerhard Dipl Ing Fh Lumineszierendes substrat
JPH06104087A (ja) * 1992-09-24 1994-04-15 Matsushita Electric Ind Co Ltd Ｅｌ装置
WO1994014180A1 (fr) * 1992-12-16 1994-06-23 Durel Corporation Dispositifs a lampes electroluminescentes et leur fabrication
WO1998007136A2 (fr) * 1996-08-14 1998-02-19 Add-Vision, Inc. Conception de lampes electroluminescentes
WO1999016289A1 (fr) * 1997-09-24 1999-04-01 Koninklijke Philips Electronics N.V. Dispositif electroluminescent organique
WO1999030304A2 (fr) * 1997-12-10 1999-06-17 Phillips Plastics Corporation Dispositif luminescent et procede associe
WO1999055121A1 (fr) * 1998-04-22 1999-10-28 Cambridge Consultants Limited Dispositifs electroluminescents

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075122A (en) * 1960-05-02 1963-01-22 Westinghouse Electric Corp Electroluminescent system, electrically non-linear element and method
DE3802318A1 (de) * 1988-01-27 1989-08-03 Beck Gerhard Dipl Ing Fh Lumineszierendes substrat
DE3802317A1 (de) * 1988-01-27 1989-08-03 Beck Gerhard Dipl Ing Fh Lumineszierendes substrat
JPH06104087A (ja) * 1992-09-24 1994-04-15 Matsushita Electric Ind Co Ltd Ｅｌ装置
WO1994014180A1 (fr) * 1992-12-16 1994-06-23 Durel Corporation Dispositifs a lampes electroluminescentes et leur fabrication
WO1998007136A2 (fr) * 1996-08-14 1998-02-19 Add-Vision, Inc. Conception de lampes electroluminescentes
WO1999016289A1 (fr) * 1997-09-24 1999-04-01 Koninklijke Philips Electronics N.V. Dispositif electroluminescent organique
WO1999030304A2 (fr) * 1997-12-10 1999-06-17 Phillips Plastics Corporation Dispositif luminescent et procede associe
WO1999055121A1 (fr) * 1998-04-22 1999-10-28 Cambridge Consultants Limited Dispositifs electroluminescents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 372 (E-1577), 13 July 1994 (1994-07-13) & JP 06 104087 A (MATSUSHITA ELECTRIC IND CO LTD), 15 April 1994 (1994-04-15) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007006346B4 (de) * 2006-02-15 2017-10-12 Osram Oled Gmbh Weiße Doppelemissions-PLED für Beleuchtung
GB2437113A (en) * 2006-04-12 2007-10-17 Cambridge Display Tech Ltd Light-emissive display and method of manufacturing the same
GB2437113B (en) * 2006-04-12 2008-11-26 Cambridge Display Tech Ltd Light-emissive display and method of manufacturing the same
US7948162B2 (en) 2006-04-12 2011-05-24 Cambridge Display Technology Limited Light-emissive display and method of manufacturing the same
DE102006039789A1 (de) * 2006-08-24 2008-02-28 Siemens Ag Flächiges Leuchtelement sowie Verwendung des flächigen Leuchtelementes
WO2009103171A1 (fr) * 2008-02-18 2009-08-27 Sst Smart Surface Technology Ag Dispositif électroluminescent et son procédé de fabrication

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Publication number Publication date
CN2431574Y (zh) 2001-05-23
EP1122984A3 (fr) 2003-02-12

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