CN1129104C

CN1129104C - Large-screen organic LEDs display

Info

Publication number: CN1129104C
Application number: CN 00118942
Authority: CN
Inventors: 葛世潮
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-25
Filing date: 2000-08-11
Publication date: 2003-11-26
Anticipated expiration: 2020-08-11
Also published as: CN1320895A

Abstract

The present invention relates to a large-screen organic light emitting diode display which comprises at least two small-screen organic light emitting diode display boards and is sealed in a sealing chamber composed of a large base board and a back sealing board, wherein column electrodes and row electrodes of the small-screen organic light emitting diode display boards are respectively and electrically connected with a bus on the large base board and a bus on the outer surface of the back board by a conductive adhesive through small holes on the large base plate and the back board and are electrically connected with a display system circuit; thereby, the passive or active large-screen organic light emitting diode display can be manufactured. The present invention can be used for manufacturing computer displays, wall hung TVs, etc. and has the advantages of simple structure, high reliability and long service life; furthermore, the present invention can be manufactured a larger-screen organic light emitting diode display.

Description

Large-screen organic LEDs display

The present invention relates to a kind of organic light emitting diode display, particularly a kind of large-screen organic LEDs display belongs to display, is used to show the picture and text and the image of monochrome, polychrome and full color.

The Organic Light Emitting Diode of prior art, comprise micromolecular Organic Light Emitting Diode (OLED) and thin polymer film light emitting diode (polymerLED) etc., have simple in structure, the visual angle is big, operating temperature range is big, reaction velocity has obtained gray scale image soon, easily and efficient height, brightness height and contrast advantages of higher, is a kind of very good display element.Yet because the organic light emission film is very thin, generally only about 0.14 micron, with vacuum chamber evaporation, rotation coated (spin-coating), or ink-jet methods such as (ink-jet) makes, and its large-area manufacturing is difficult to reach very uniform requirement; If make polychrome or panchromatic large area display with vacuum evaporation, not only require to have very big vacuum system, and high-precision mask alignment will be arranged and move the mechanical system that cover steams several not homochromy luminous organic materials, it is big more to make area, and investment and cost are just high more; Because Organic Light Emitting Diode is a kind of low-voltage direct diode, and working current is big, and the giant-screen device must have the very electrode of small resistor, this also is one of difficulty simultaneously.Therefore Organic Light Emitting Diode shows that main target is to make the display of the small screen at present, and for example diagonal line is used for small-sized demonstrations such as mobile phone, digital camera, head-mounted display below several inches.

The objective of the invention is to overcome the deficiency of above-mentioned existence, and a kind of large-screen organic LEDs display of simple in structure, good reliability is provided.

A kind of large-screen organic LEDs display, it comprises at least two the small screen Organic Light Emitting Diode display boards, this the small screen Organic Light Emitting Diode display board is fixed on the inside surface of a large substrates, and be sealed in the closed chamber that constitutes by large substrates, back of the body seal pad and envelope wall, each electrode of the small screen Organic Light Emitting Diode display board is electrically connected with outer driving circuit through envelope wall through signal bus.

Described the small screen Organic Light Emitting Diode display board, include a substrate of making by glass or plastics, the electrode of being made by tin indium oxide, aluminium, magnesium or other conductive material is arranged on its inside surface, at least one deck organic luminous layer is arranged on this electrode, the back electrode of being made by tin indium oxide, aluminium, magnesium or other conductive material is arranged behind the luminescent layer, and outside it, also have a sealing backing layer or a backboard of making by sealed insulating material, glass or plastics.

Described electrode is electrically connected with column or row bus on the large substrates by conducting resinl or other conductive material via the aperture on the substrate, and back electrode is electrically connected with the row or column bus by conducting resinl or other material via the aperture on sealing backing layer or the backboard, and each is electrically connected two buses with the display system circuit.

Described large substrates is a transparent panel, and it is made by glass, plastics or printed circuit board (PCB).

Described large substrates is made by printed circuit board (PCB), and back electrode is transparency electrode, and the light emitting diode issued light is via the outgoing of back of the body seal pad.

Described back of the body seal pad is made by glass or plastics, it and large substrates and used the fluid sealant of being made up of epoxy resin or silica gel to seal and constituted closed chamber by the envelope wall that glass, plastics or pottery are made.

Described large substrates or back of the body seal pad have one deck to intensify on the outside surface optical layers, in closed chamber, be provided with the getter of harmful gases such as absorbing steam and oxygen in addition.

Interior or the outside surface of substrate of the present invention or sealing backing layer or backboard is provided with filter layer and black matrix".

Described substrate is passive or the active organic LED display board.

Description of drawings is as follows:

Fig. 1 is the diagrammatic cross-section of the structure of large-screen organic LEDs display of the present invention.

Fig. 2 is the front schematic view at an angle of the present invention's large-screen organic LEDs display shown in Figure 1.

Fig. 3 is the another structural profile synoptic diagram of large-screen organic LEDs display of the present invention.

The present invention will be described in detail below in conjunction with accompanying drawing:

Fig. 1 is the structural profile synoptic diagram of large-screen organic LEDs display of the present invention.Transparent large substrates 1 among Fig. 1 is made by glass, plastics or printed circuit board (PCB); At least two the small screen Organic Light Emitting Diode display boards 2, they are fixed on transparent adhesive tape 3 on the inside surface of large substrates 1; Column signal (or row signal) bus 4 is arranged on the inside surface of large substrates 1, make with the printing of silver slurry or other conductive material.Described at least two the small screen Organic Light Emitting Diode display boards 2, include a substrate 5, make by glass or plastics, electrode 6 is arranged on its inside surface,, make by tin indium oxide (ITO), aluminium, magnesium/silver or other conductive material as row (or row) electrode of display, at least one deck organic luminous layer 7 is arranged on the electrode 6, back electrode 8 is arranged behind the luminescent layer 7,, make by conductive materials such as ITO, aluminium or magnesium/silver as row (or row) electrode of display.Have at least one to be transparent in described electrode 6 and the back electrode 8,

electrode

6,8 and luminescent layer 7 constitutes a light emitting diode, when two electrodes add suitable DC voltage, and 12v for example, light emitting diode is promptly luminous, shown among Fig. 1 25.The sealing backing layer of the small screen Organic Light Emitting Diode display board or backboard 9 are made by sealed insulating material, glass or plastics etc.The outside surface of described large substrates 1 can have the contrast of increasing layer 10, to improve the contrast of displayed image.

On the outside surface or inside surface of the substrate 5 of the small screen Organic Light Emitting Diode display board, colour filter 11 and black matrix" 12 can be arranged, to improve excitation and contrast; The row of described each the small screen organic light-emitting diodes display board (or row) electrode 6 links to each other with row (or capable) bus 4 on the large substrates 1 through the aperture 13 usefulness conducting resinls on the substrates 5 or other conductive material 14, bus 4 links to each other with display system signals, input row (or row) signal.Aperture 15 usefulness conducting resinls or other conductive material 16 of described row (or row) electrode 8 on backboard or sealing backing layer 9 is electrically connected with row (or row) bus 17, and bus 17 links to each other with driving circuit 18.When large substrates 1 was printed circuit board (PCB), the row and column bus can be all on large substrates, and 4,13 and 14 is identical among method of attachment and Fig. 1, or was electrically connected through aperture 13 and printed circuit board (PCB) with conductor wire.Owing to Organic Light Emitting Diode can reduce the life-span because of steam or oxygen etc., therefore display screen needs good sealing, particularly when the substrate 5 of the small screen Organic Light Emitting Diode display board 2 and backboard 9 are made by plastics, because the sealing property of plastics is not good enough, therefore can add a back of the body seal pad 19 and an envelope wall 20 in addition, described back of the body seal pad 19 and envelope wall 20 can be by glass, pottery or plastics are made, and with fluid sealants such as epoxy resin or silica gel 21 sealing, described back of the body seal pad 19, envelope wall 20 and large substrates 1 constitute the closed chamber of a favorable sealing property, in the small screen Organic Light Emitting Diode display board 2 is sealed in, to improve the life-span of display.In order further to improve display life, in described closed chamber, can place the getter 22 of harmful gases such as absorbing steam and oxygen.

When electrode 8 is a transparency electrode, issued light is during by backboard 9 direction outgoing, and shown among Fig. 1 26, then increasing the contrast layer should be on the outside surface of back of the body seal pad 19, shown in 10a among Fig. 1.Described colour filter and black matrix" 12 should be on the interior or outside surfaces of backboard 9.

Fig. 2 is the front schematic view at an angle of the present invention's large-screen organic LEDs display shown in Figure 1.Large substrates 1 is arranged, envelope wall 20, driving circuit 18 and 24, the small screen Organic Light Emitting Diode display board 2 among Fig. 2.Be produced on row (or row) signal bus 4 on large substrates 1 inside surface, it is between each image point 23.Figure 2 shows that one forms the example of the full color display of a pixel by three image points 23 of red (R) blue (G) green (B).Every row (or row) image point has a common transparency electrode 6, and it is electrically connected with row (or row) bus 4 by conducting resinl or other conductive material 14 through small holes 13.Go back the back electrode 8 of Organic Light Emitting Diode among Fig. 2, each row (or row) has a common back electrode 8, it is through the aperture 15 on the backboard, be electrically connected with row (or row) bus 17 by conducting resinl or other conductive material 16, when among display issued light such as Fig. 1 during 26 direction outgoing, bus 17 should be between image point 23, shown in 17a among Fig. 2.When being added to the row and column electrode 6 of display from the control signal of display system via

driving circuit

18 and 24 and 8 the time, display can show picture and text or image.Relevant driving method can be with reference to interrelated data, J.SID for example, vol.7, No.3, p221,1999.When large substrates 1 was printed circuit board (PCB), electrode 8 was a transparency electrode, and the light emitting diode issued light is by backboard 19 outgoing, shown among Fig. 1 26.

Driver 18 and 24 among Fig. 1 and 2 also can be installed on the display backplane 19.

Fig. 3 is the structural representation of large substrates 1A when being printed circuit board (PCB), and transparent back of the body seal pad 19A has filter layer 11 and black matrix" 12 on its inside surface, optical layers 10A is arranged on the outside surface.The back electrode 8 of little display board 2 is a transparency electrode, and she and electrode 6 all pass through the aperture 13 on the substrate 5, link to each other with

data bus

28,29 on the printed circuit board (PCB) 1A with conductive material 14, and in printed circuit board (PCB) electric connection line 27 in addition.Driving circuit 18A such as the row and column in addition shown in the figure.Identical among content shown among Fig. 3 other and Fig. 1.

Fig. 1 and 2 is depicted as the embodiment of a passive organic light emitting diode display.Structure of the present invention also can be used for the active organic LED display.At this moment the small screen Organic Light Emitting Diode display board 2 is an active organic LED, for example make substrate or make active matrix, also have a series of little semi-conductor chips to be installed in active organic LED display board between each pixel with thin film transistor (TFT) with semi-conductor silicon chip.

The present invention compared with prior art, have simple in structure, reliability is high, can be made into giant-screen very The advantages such as organic light emitting diode display and life-span are long can be used for making various computer displays, wall Hang TV and multi-media display etc., be used for showing monochrome, polychrome and panchromatic picture and text and image.

Claims

1, a kind of large-screen organic LEDs display, it comprises at least two the small screen Organic Light Emitting Diode display boards, it is characterized in that described the small screen Organic Light Emitting Diode display board (2) is fixed on the inside surface of a large substrates (1), and be sealed in by large substrates (1), in the closed chamber that back of the body seal pad (19) and envelope wall (20) constitute, at least one deck organic luminous layer (7) is arranged on each electrode of the small screen Organic Light Emitting Diode display board (2), have behind the luminescent layer by tin indium oxide, aluminium, the back electrode that magnesium is made (8), and outside it, also have one by sealed insulating material, sealing backing layer that glass or plastics are made or backboard (9), electrode (6) is electrically connected with column or row bus (4) on the large substrates (1), and back electrode (8) is electrically connected with row or column bus (17) by conducting resinl via the aperture on sealing backing layer or the backboard (9), and each is electrically connected two buses with outer driving circuit.

2, large-screen organic LEDs display as claimed in claim 1, it is characterized in that described the small screen Organic Light Emitting Diode display board (2), include a substrate of being made by glass or plastics (5), its inside surface has the electrode of being made by tin indium oxide, aluminium, magnesium (6).

3, large-screen organic LEDs display as claimed in claim 2 is characterized in that described electrode (6) is electrically connected with column or row bus (4) on the large substrates (1) by conducting resinl via the aperture (13) on the substrate (5).

4, large-screen organic LEDs display as claimed in claim 3 is characterized in that described large substrates (1) is a transparent panel, and it is made by glass, plastics or printed circuit board (PCB).

5, large-screen organic LEDs display as claimed in claim 4 is characterized in that described large substrates (1) made by printed circuit board (PCB), and back electrode (8) is transparency electrode, and light emitting diode issued light (26) is via the outgoing of back of the body seal pad (19).

6, large-screen organic LEDs display as claimed in claim 5, it is characterized in that described back of the body seal pad (19) made by glass or plastics, it and large substrates (1) and use the fluid sealant of forming by epoxy resin or silica gel (21) to seal and constituted closed chamber by the envelope wall (20) that glass, plastics or pottery are made.

7, large-screen organic LEDs display as claimed in claim 6, it is characterized in that described large substrates (1) or carry on the back the optical layers that has one deck to intensify on the outside surface of seal pad (19), in closed chamber, be provided with the getter (22) that absorbs steam and oxygen objectionable impurities in addition.

8, large-screen organic LEDs display as claimed in claim 3 is characterized in that the interior or outside surface of described substrate (5) or sealing backing layer or backboard (9) is provided with filter layer and black matrix".

9, large-screen organic LEDs display as claimed in claim 8 is characterized in that described substrate (5) is passive or active organic LED display board.