WO2007097545A1

WO2007097545A1 - Flat light emitting oleds device from combined multiple dual emission transparent oleds

Info

Publication number: WO2007097545A1
Application number: PCT/KR2007/000823
Authority: WO
Inventors: Yang Tae Kim
Original assignee: Yang Tae Kim
Priority date: 2006-02-20
Filing date: 2007-02-15
Publication date: 2007-08-30

Abstract

The present invention relates to the flat light emitting OELDs device surface-illuminating with various light by the organic light-emitting device(OLEDs). It relates to the flat light emitting device by the multiple transparent organic light emitting device, which if the independent transparent organic light emitting devices radiating different primary color light of red light(R), green light(G) and blue light(B) which is the typical primary color light are manufactured seperatively and arranged in stacked form and are power-supplied, the multiple transparent organic light emitting device is made, which enables light emit forward backward by radiating three-band light, if light is concentrated into focus in a fixed direction by using a reflector etc., various colors of lights is made forward, and if each brightness is regulated, substantial three band white light or various lights can be observed forward Particularly, it relates to the surface light source organic light-emitting device(OLEDs) apparatus which is suitable for the surface light source white light backlight unit (Backlight Unit: BLU) and lighting device.

Description

FLAT LIGHT EMITTING OLEDS DEVICE FROM COMBINED MULTIPLE DUAL EMISSION TRANSPARENT OLEDS

Technical Field

[I] The present invention relates to the high bright flat light emitting OLEDs device radiating various color lights of flat light emitting.

Background Art

[2] The present invention relates to the high bright flat light emitting OELDs device radiating various color lights of flat light emitting.

[3] There is US Patent No.5683823 reported by Shi Jianmin as the prior art about the white light production OLEDs.

[4] Here, a light-emitting layer includes red and blue light emitting material uniformly dispersed in host light emission materials, so the apparatus has good electroluminescence characteristics. But the operation is difficult due to the difficulty of controlling concentration of a blue and red dopant during large manufacture.

[5]

[6] Disclosed is a white light OLED making the white light emission possible, which is manufactured by attaching a green light-emitting layer having the domain which contains red fluorescent layer after attaching blue light-emitting layer in the hole- transport layer(HTL) in JP7142169 invented by Sato etc.

[7] Disclosed is a white light expulsion device which is able to emit white light by reacting recombination of a hole and electron and includes the fluorescent substance in the cyan-red visible range in US Patent No.5405709 invented by Littman etc.

[8] In US Patent No.5703436 invented by forest (Stephen R.Forrest) etc., the embodiment of the SOLED (Stacked organic light emitting devices) structure of the laminating structure is provided.

[9] Here, it is disclosed that as to the color display which is performed by arranging those in stacking type of blue(B), red(R) and green(G) and positioning the insulating layer in an interval on one substrate to form the display, a true color pixel is formed by consecutively stacking and arraying three OLEDs radiating different primary color light of blue(B), green(G) and red(R) which are typical primary colors on one substrate.

[10] The thin film forming of the insulating layer and metal electrode layer is repetitively manufactured on the organic layer, so it is limited that it is continuously performed for real operations in pertinent industry.

[I I] As to the method through the electroluminescent pixel, a white color display phase is formed by forming RGB color on the plane and combining RGB of each pixel through shadow masking technique such as described in US Patent No. 5742129 invented by Kenichi Nagayama etc.

[12] This technique is effective but has a defect in manufacturing a wide screen.

[13] It is difficult to achieve high definition pixel size by using a shadow masking technique, and there is a problem with arraying a substrate and shadow mask, and to form a pixel in the proper location needs considerable caution. It is difficult to manipulate the shadow mask in order to form the appropriately located pixel in case it is desirable to increase the substrate size.

[14] For a product needing robustness and long lifetime as described in US Patent

No.6305818, point source of light within a mono-modulator with glass lens designed suitablely to control light required in special field by combining a plurality of LED devices by using a solid-state light emitting diode(LED) is provided.

[15] As to these multiple solid-state light emitting diode devices(LED), it is costly and complicated to manufacture and integrate signal region lighting devices and LED provides a undesirable point source of light for a field illumination.

[16] Therefore, a replaceable flat light emitting OELDs device is required which has a simple structure, is cheap, and has commercial availability with existing radiation basic structure.

[17]

Disclosure of Invention

Technical Problem

[18] Technical challenges of the invention

[19] A transparent organic light emitting device(T OLED) of the prior art depends on how to set up the transparent electrode used in the electrode of the anode in the transparent electrode of the cathode, which depends on researches on how to improve the existing conductivity, transmittance ratio, flatness and the existing conductivity, transmittance ratio, flatness and required from the transparent electrode film, and the flatness until now and how to make rapidly transparent oxide conductive in existing luminosity organic film without damage.

[20] Moreover, the laminate organic light-emitting diode device using the conventional one board has the difficulty in the manufacture due to repeatedly depositing the electrode layer of a metal on the organic layer.

[21] Therefore, the present invention is to provide the flat light emitting OELDs device of the substantial changing countenance light according to a transparent organic light emitting device(TOLED) having excellent performance and solving the above problem. [22]

Technical Solution

[23] There are a large number of configurations of organic light emitting diodes which successfully can execute the present invention in prior art.

[24] A structure of the organic light-emitting device(OLED) of the typical conventional prior art is illustrated in figure 1, and conventional organic light-emitting device(OLED)(70) is manufactured on single board like the glass substrates (291) and mixes one or more organic layer(lOO).

[25] The substrate(291), the anode electrode layer(311) as the first electrode device, and each organic layer(lOO) and the second electrode device(321) are included, and the organic layer(lOO) includes the hole implant layer(HIL)(110), hole-transport layer(HTL)(l l l), organic light-emitting layer(EML)(122), electron-transport layer(ETL)(l 13) and electron injection layer(EIL)(l 14).

[26] Preferably the total thickness of a normal organic layer(lOO) is about 100-1500A.

[27] A cathode electrode layer(321) is formed on the organic layer(lOO) as the second electrode device.

[28] In the organic light-emitting layer(EML)(122) of an organic light-emitting diode(OLED)(70), organic electroluminescent is induced by supplying electricity to the organic layer(lOO) by power feeding equipments (401, 402) electrically connected to conductive electrode devices (311, 321) as described in figure 1.

[29] The cover(not illustrated) airtight-seals an OLED device(70) by being adhered on the lower part of a substrate(291) and upper part of a electrode device(321), which can prevent an organic light-emitting diode(OLED)(70) from being polluted by moisture or oxygen.

[30] The organic light-emitting diode(OLED) in figure 1(70) is known to have typically a luminosity external quantum efficiency of 0.05 ~ 4 percent according to the radiation color and the structure thereof.

[31] An example of prior art is described in US4769292, US4885211 and US5294870 etc. invented by Tang etc.

[32] The present invention is especially noted that a transparent organic light emitting device(TOLED) or the transparent organic light emitting diode(TOLED) can be comprised of the substrate(291), and the first conductive elemental 1) and the second conductive element(321) as shown in Figure 1, differently, the light- transmissive substrate and transparent electrodes.

[33] As shown in Figure 2, the most preferable a transparent organic light emitting device(TOLED) or the transparent organic light emitting diode(TOLED) for the first preferred embodiment is completed by binding the second power circuit(320) in a vacuum atmosphere in which moisture or oxygen etc. is extremely limited in a vacuum atmosphere in which moisture or oxygen etc. is extremely limited after depositing successively the organic layer(lOO) consisting of hole implant layer(HIL)(110), hole- transport layer(HTL)(l 11), the suitable host and the organic light-emitting layer(EML)(122) having a dopant, next, the electron-transport layer(ETL) (113), and the electron injection layer(EIL)(l 14) etc. on the first power circuit manufactured in advance(310) by a method including the vacuum evaporation etc.

[34] The first power circui(310) and the second power circuit(320) forms Transparent electrode(312, 322) on the surface of the first, second substrate which is a transparent glass substrate or transparent fusible substrate and have the structure comprising auxiliary electrodes(313, 323) on transparent electrodes(312, 322).

[35] Auxiliary electrodes(313, 323) take form and shape in which the center portion is vacant for light projected.

[36] In case of operating it as described above according to the present invention, as to the manufacture of a normal organic light-emitting diode (OLED) as described in Figure 1, it has the effect to minimize damage of an organic layer(lOO) which is easily occurred in the process for the manufacture of the cathode electrode and compose a transparent electrode layer.

[37] Moreover, in figure 2, the thin film which materials consisting of one or more selected in the group consisting of indium tin oxide(ITO), indium oxide(lnθ), indium- zinc-oxide(IZO), and the tin oxide(TO) and zirconium oxide(ZO) on the first, and second substrate are sputtered in the plasma atmosphere in advance can be used as the first, and second transparent electrode, and the electrode of enough thickness can be used, which has the effect that the short circuit of a substrate can be minimized and the short circuit is prevented about the flexibility.

[38] It has the effect of the low power by reducing electrical surface resistance.

[39] Because if the first and second transparent electrode(312, 322) are formed on the first, second substrate(311, 321) by forming materials comprising one or more selected in the group consisting of the indium tin oxide(ITO) of 0~100nm thicknesses, indium oxide(lnθ), indium-zinc-oxide (IZO), and the tin oxide(TO) and zirconium oxide(ZO) and a silver(Ag) layer of 0~70nm thickness and the first, and second transparent electrode(312, 322) on the first, second substrate in the form that a silver(Ag) layer is inserted between transparent electrode layers, the conductivity of metallic foil including a little bit silver can becomes good, so electronical surface resistance of the first and second power circuit can decrease, the short circuit about the flexibility can be protected and electrical resistance about the flexibility can be reduced, so it can have more efficient electrical performance.

[40] Referring to Figure 3, the structure of a transparent organic light emitting device(TOLED)(77) is described by each layer in more detail.

[41] The first transparent electrode(312) is formed on the first transparent substrate(311), and the first counter electrode(313) which its center is empty for light penetration and its rim is composed of materials having good conductivity is formed on the first transparent electrode (312)

[42] The first transparent electrode(312) and the first counter electrode (313) become a normal anode electrode layer and constitute the first power circuit(310).

[43] And such as forming process of the first power circuit, as to the second circuit(320), the second transparent electrode(322) is coated under the second transparent substrate and the second auxiliary electrode(323) which its center is empty for light penetration and its rim is composed of materials having good conductivity is formed under the second transparent electrode(322).

[44] The second transparent electrode(322) and the second auxiliary electrode(313) become a normal anode electrode layer and constitute the second power circuit(310).

[45] The first and second transparent electrode can be materials consisting of one or more selected in the group consisting of indium tin oxide(ITO), indium oxide(lnθ), indium- zinc-oxide(IZO), and the tin oxide (TO) and zirconium oxide(ZO) or conductivity polymer.

[46] The first and second power circuits (310, 320) can be prepared in advance.

[47] Next, the hole implant layer(HIL)(l 10) of the organic layer, and the hole-transport layer(HTL)(l 11), the host which is suitable for the radiation of the predetermined wavelength band and the organic light-emitting layer(EML) having a dopant(122), next the organic layer(lOO) consisting of electron-transport layer(ETL)(l 13), and the electron injection layer(EIL)(114) etc. are sequentially formed on the first transparent electrode of the first power circuit(310)(312) by a method including vacuum evaporation etc.

[48] After the organic layer(lOO) is formed, it is completed by making the second transparent electrode(322) of the second power circuit(320) prepared in advance and the upper side of the electron injection layer(EIL)(l 14) intersect and binded by a method including a junction etc. in vacuum atmosphere in which moisture or oxygen etc. is extremely limited.

[49] Here, if each organic layer(lOO) is so thin the continuity of the thin film can be insufficient, and the thick thin film has tendency to have the high inner resistance which demands the operation at higher power.

[50] The organic light-emitting layer(EML)(122) is made to radiate recombination energy by being reunited with holes supplied(holes) to the hole transporting layer(HTL)(l 11) and electronicses supplied by the electron-transport layer(ETL)(l 13) while constituting ordinarily one layer of an organic layer(lOO) to a thickness of 100-500A.

[51] There is a method which enhances reunion efficiency by putting a blocking layer in order to raise the recombination-rate of a hole and electronics because the mobility of the electronics through the electron transport layer(ETL)(l 13) is slower than the mobility of the hole through the hole transporting layer(HTL)(l 11).

[52] The organic light-emitting layer(EML)(122) can be doped with the host in which the predetermined dopant makes the emission spectrum in the absorption region and the corresponding dopant in the phosphorescence and fluorescent material in order to adjust the radiation color and increase the electroluminescence efficiency.

[53] The first and second auxiliary electrodes(312, 323) can be formed with an alloy such as Al, Cu, Mg/ Ag and a metal having good conductivity such as gold (Au) or silver (Ag) on Mg/ Ag.

[54] If normal bias power is supported between the first counter electrode (313) and the second auxiliary electrode(323), light is emitted in an organic light-emitting layer(EML)(122), and light is radiated by projectting the first and second power circuit of both sides.

[55] As to the first, and second substrates(311,321), the various material, for example, pliable or soft substrate such as PES (poly ethersulf one), PC (polycarbonate), PET(polyethylene terephthalate) or PEN (poly ethylene naphthalate) can be applied on one side or a both-side of the second hard substrate.

[56] Referring to Figure 4, the cross section of a transparent organic light emitting device(TOLED)(77) is shown.

[57] The normal organic layer(lOO) is interposed, the first transparent electrode(311) of the first power circuit(310) forms the anode electrode layer on the lower part, and the second transparent electrode layer(322) of the second power circuit(320) is comprised in the top as the cathode electrode layer.

[58] If the normal power supply(401) and ground connection(402) are connected to the first and second auxiliary electrodes(313, 323) and is supplied with electricity, as described above, electronicses introduced from the electron transport layer(ETL)(l 13) is reunited with holes supplied from the hole transporting layer(HTL)(l 11) on the organic light-emitting layer(EML)(122), so the recombination energy makes the radiation.

[59] Lower penetration light(502) projecting downward is generated by letting the light emitted from the organic light-emitting layer(EML)(122) of the organic layer(lOO) project the first power circuit(310) and top penetration light(501) projecting upward is generated by letting it the second power circuit(320).

[60]

[61] Referring to Figure 5, in the structure of including the light reflecting plate(812) on upper side of the rear substrate(811) of a transparent organic light emitting device(TOLED)(77), a schematical configuration diagram of illustrating the drive of the radiation is shown.

[62] If the normal power supply(401) and ground connection(402) are connected to the first and second auxiliary electrodes(313, 323) and is supplied with normal electricity, electronicses introduced from the electron transport layer(ETL)(l 13) is reunited with holes supplied from the hole transporting layer(HTL)(l 11) on the organic light- emitting layer(EML) (122), so the recombination energy makes the radiation.

[63] The string of the lower penetration light(502) light-emitting from the light-emitting layer(EML) of the organic layer(100)(122) and projecting by permeating the first power circuit described in the above(310) and the string of the top penetration light(501) projecting the second power circuit(320) are generated.

[64] At this time, it is clear if the light reflecting plate(812) is positioned on the backplane of the first power circuit(310), the lower part light penetration light(502) is reflected on the light reflecting plate (812) and the string of reflection light(503) again projects a transparent organic light emitting device(TOLED)(77) and the reflection light(503) which is reflected on the boundary face of the second power circuit(320) and the upper penetration light(501) can be observed on frontal surface.

[65] Referring to Figure 6, it is a schematical example diagram which briefly shows in order to illustrate the second preferred embodiment of the present invention.

[66] A transparent organic light emitting device(TOLED)(77) of the first preferred embodiment performed in figure 2 is independently manufactured, and the first a transparent organic light emitting device(350), a transparent organic light emitting device emitting the light of the second color different with the first color(360), and a transparent organic light emitting devices including first, and the third a transparent organic light emitting device(370) emitting the light of the different color and then a transparent organic light emitting devices(350,360,370) are provided and the transparent organic light emitting devices(350,360,370) are arranged in the stacked form.

[67] Transparent organic light emitting devices(350, 360, 370) having light-emitting property including blue light(B), green light(G) and red light(R) etc. according to component of organic materials in organic layers (150, 160, 170) of the first, second and third transparent organic light emitting devices emitting the first, second, and third color lights can be made up, and if the said devices are adhered closely, arranged in stacking form, and operated, a multiple transparent organic light emitting device (MTOLED)(777) letting various lights of three primaries of blue light(B), green light(G), and red light(R) (changing countenance light) emit to rear side of the first transparent organic light emitting device(350) and front side of the third transparent organic light emitting device(370) or emit white light to both side is completed.

[68]

[69] If the configuration of the second preferred embodiment in figure 7 is illustrated in more detail, as to the first a transparent organic light emitting device radiating the blue light(B) in the lower part of figure 7 (350), the first transparent electrode(312a) which is comprised of The transparent first board layer(31 Ia) as the transparent electrode and The first power circuit consisting of the first counter electrode(313a) in which the electric conductance is good(310a) are prepared in advance.

[70] The hole implant layer(HIL)(l 10a) of the organic layer, and the hole-transport layer(HTL)(l 1 Ia), The host which is suitable for the blue light emitting and the blue organic light emitting layer(EML)(125) doped to a dopant, next, the blue light emitting organic layer consisting of electron-transport layer (ETL) (113a), and the electron injection layer (EIL) (114a) etc.(150) are sequentially formed on the transparent electrode of the first power circuit(310a)(312a) by a method including vacuum evaporation.

[71] In the second power circuit similarly to the first power circuit (310a) formation, the second power circuit comprised of the transparent electrode(322a) and auxiliary electrode(323a) etc. on the second board layer (321a) (320a) is formed in advance.

[72] The first a transparent organic light emitting device(350) radiating blue light(B) is completed by uniting the electron injection layer(EIL) (114a) upper side of the successively evaporated blue light emitting organic layer(150) and the second transparent electrode(322a) side.

[73] It is preferable that the above junction is performed by a method such as a junction etc. in vacuum like the environment within the vacuum chamber in which the material promoting the oxidation such as moisture and oxygen is extremely restricted.

[74] The blue organic light emitting layer(EML)(122) is comprised of the blue light emitting organic layer(150) to a thickness of about 100-500 A and The hole supplied from the hole transporting layer(HTL)(l 1 Ia) and Electronicses supplied from the electron-transport layer(ETL)(l 13a) are combined on the blue organic light-emitting layer(EML)(126) having a dopant and the host which is suitable for the blue light emitting and the recombination energy provides blue light emitting.

[75] As to the second a transparent organic light emitting device radiating green light(G)(360), the first transparent electrode which is the transparent first substrate(31 Ib) comprised of the transparent electrode in the lower part while being comprised the middle part of figure 7(312b) and the first substrate consisting of the first counter electrode(313b)(310b) are prepared in advance.

[76] The hole implant layer(HIL)(l 10b) of the organic layer, and the hole-transport layer(HTL)(l l lb), the green organic light-emitting layer(EML) (126) in which a dopant is doped in the host which is suitable for the green luminescence, next the green luminescence organic layer(150) consisting of electron-transport layer(ETL)(113b), and the electron injection layer(EIL)(l 14b) etc. are successively formed on the transparent electrode of the first power circuit(310b)(312b) by a method including the vacuum evaporation etc.

[77] And similarly to the first power circuit(310b) formation, On the second substrate(321b) the second a transparent organic light emitting device radiating green light(G)(360) is completed by combining the second transparent electrode(322b) of the second power circuit(320b) consisting of the second transparent electrode(322b) and the second auxiliary electrode (323b) etc. and The upper side of the successively evaporated organic layer (160) with the method of welding in a vacuum.

[78] Also, it is preferable that the above junction is performed by a method such as a junction etc. in vacuum like the environment within the vacuum chamber in which the material promoting the oxidation such as moisture and oxygen is extremely restricted.

[79] A green light(G) organic light-emitting layer(EML)(126) is composed of a green luminescence organic layer(160) to a thickness of 100-500A and the hole supplied from the hole transporting layer(HTL)(l 1 Ib) and the electronicses supplied from the electron-transport layer(ETL)(l 13b) is combined on a green organic light-emitting layer(EML)(126), and the recombination energy provides green luminescence.

[80] The third a transparent organic light emitting device radiating the red light(R) positioned in the upper layer(370) is positioned on the second a transparent organic light emitting device.

[81] The transparent first substrate(31 Ic) from the lower part of the third a transparent organic light emitting device(370) and the first substrate consisting of the first transparent electrode (312c) and the first counter electrode(313c)(310c) can be prepared in advance

[82] The hole implant layer(HIL) of the organic layer(l 10c), hole-transport layer(HTL)(l 1 Ic), the host which is suitable for the red light emitting and the red organic light-emitting layer(EML)(127) having a dopant, next, the red light emitting organic layer(170) consisting of electron-transport layer(ETL)(113c), and the electron injection layer(EIL) (114c) etc. are successively formed by a method including the vacuum evaporation etc. on the transparent electrode of the first power circuit (310c)(312c)

[83] And similarly to the first substrate(310c), the third a transparent organic light emitting device radiating the red light(R)(370) is completed by welding the second transparent electrode(322c) of the second substrate (320c) comprised of the transparent electrode(322c) and the second auxiliary electrode(323c) etc. on the second substrate(321c) and The successively evaporated electron injection layer(EIL)(114c) in a vacuum.

[84] Also it is preferable that the above junction is performed by a method such as a junction etc. in vacuum like the environment within the vacuum chamber in which the material promoting the oxidation such as moisture and oxygen is extremely restricted.

[85] The red light(R) organic light-emitting layer(EML)(127) is comprised of the red light emitting organic layer(170) to a thickness of about 100-500 A and the hole supplied from the hole transporting layer(HTL) (11 Ic) and the electronicses supplied from the electron-transport layer (ETL)(113c) are combined on The red organic light- emitting layer(EML)(126) having a dopant and the host which is suitable for the red light emitting, and the recombination energy provides red light emitting.

[86] The multiple a transparent organic light emitting device(MTOLED) (777) is completed by arranging The first, second and third a transparent organic light emitting device(350, 360, 370) which are independently manufactured in stacked form.

[87] The order of the first transparent organic light emitting device radiating blue light(B)(350), the second transparent organic light emitting device radiating green light(G)(360), and the third transparent organic light emitting device radiating red light(370) is exemplified as stacking order, but the first, second, and third transparent organic light emitting devices (350, 360, 370) can be stacked in any stacking order.

[88] Figure 8 is a cross-sectional view of the multiple a transparent organic light emitting device(MTOLED)(777) for briefly illustrating the principles of a drive of the multiple a transparent organic light emitting device (MTOLED) (777).

[89] The first counter electrode (313a) positioned in the first a transparent organic light emitting device(350) is connected to the first power source hole motive(401a).

[90] The first power source hole motive(401a) generates the first driving power(VCCl) operating the first transparent organic light emitting device (350).

[91] The lightness of blue light (B) radiated by the first transparent organic light emitting device(350) is controlled by the size of the first driving power(VCCl).

[92] The first counter electrode(313b) positioned in the second transparent organic light emitting device(360) is connected to the second power source hole motive(401b).

[93] The second power source hole motive(401b) generates the second electricity(VCC2) determining the lightness of the green light(G) radiated from the second transparent organic light emitting device(360) with the second electricity (VCC2).

[94] The first counter electrode(313c) positioned in the third transparent organic light emitting device(370) is connected to the first power source hole motive(401c).

[95] The first power source hole motive(401c) generates the third power (VCC3) determining the lightness of the red light(R) radiated from the third transparent organic light emitting device(370) with the third driving power (VCC3). [96] As to each lightness of the first, second, and third transparent organic light emitting devices(350, 360, 370) of the multiple transparent organic light emitting device( MTOLED)(777), The lightness of the light radiated with the first, second and third transparent organic light emitting devices(350,360,370) can be separately controlled by controlling each voltage or the current amount which first transparent substrates (311a,311b,311c) is supplied through the first counter electrode(313a, 313b, 313c), and the clear control of the lightness of the separate first, second, and third transparent organic light emitting devices(350, 360, 370) is available with amount of the corresponding input voltage.

[97] It is clear that the first, second and third driving power for operating the first, second and third transparent organic light emitting devices(350, 360, 370) described in the above is set to be polar, but in case of the order of organic materials is reversed and organic materials is evaporated, the polarity of the power source can be changed and applied.

[98] Moreover, those can be changed to operate with positive or negative polar input control signals.

[99] Referring to Figure 9, it is the flat light emitting device in which the changing countenance light(the various light) or the white light can be observed from the front side, if it is arranged including the rear substrate(811) on the rear side of the multiple transparent organic light emitting device(777), if it is arranged including the rear substrate (81 l)on the rear side of the multiple transparent organic light emitting device(777), the light reflecting plate(812) on the rear substrate(811), and the light reflecting plate(812) on the rear substrate(811), and the front substrate on the front side(851) as the third preferred embodiment of the present invention.

[100] Various white lights are observed in the front substrate(851) by providing a plurality of transparent organic light emitting devices(350, 360, 370) including the first transparent organic light emitting device (TOLED)(350) radiating the blue light(B), the second transparent organic light emitting device(TOLED)(360) radiating the green light(G), and the third transparent organic light emitting device(T OLED) (370) radiating the red light(R) are independently provided, and letting each light of blue(B) (501B), green(G)(501G), and red(R)(501R) radiated on the front side project the first, second, and third transparent organic light emitting devices (350, 360, 370) and mixing blue(B)(501B), green(G)(501G), and red lights(R)(501R).

[101] Referring to Figure 10, in flat light emitting device(OLEDs) device including the rear substrate(811) on the rear side of the multiple transparent organic light emitting device(MTOLED)(777), if a plurality of transparent organic light emitting devices including the first transparent organic light emitting device(350) radiating the light of the blue(B), the second transparent organic light emitting device(360) radiating the green (G) light, and the third transparent organic light emitting device(370) radiating the light of the red(R)(350, 360, 370) are independently provided, and are operated by supplying the predetermined power source, each blue light(B)(502B), green light(G)(502G), and red light(R)(502R) emitted rearwards project the first, second, and third transparent organic light emitting devices(350, 360, 370) and are reflected to the light reflecting plate(812), each reflected blue light(B)(503B), green light(G) (503G), and red light(R)(503R) again project the first, second, and third transparent organic light emitting devices(350, 360, 370), and various light of three band of blue(B)(503B), green(G)(503G), and red(R)(503R) or white light can be observed.

[102] Referring to Figure 11, in a flat light emitting device(OLEDs) including the rear substrate(811) on the rear side of the multiple transparent organic light emitting device(MTOLED)(777) and the front substrate(851) on the front side, a flat light emitting device(OLEDs) is shown which if a plurality of transparent organic light emitting devices including the first transparent organic light emitting device(350) radiating the light of the blue(B), the second transparent organic light emitting device(360) radiating the green(G) light, and the third transparent organic light emitting device(370) radiating the light of the red(R)(350, 360, 370) are independently provided and is operated by supplying predetermined power source, each blue light(B)(502B), green light(G)(502G), and red light(R)(502R) is radiated forward and backward, and as to blue light(B)(503B), green light(G)(503G), and red light(R) (503R) radiated backward, as shown in Figure 10, each light is reflected to the light reflecting plate(812), each reflected blue light(B)(503B), green light(G)(503G), and red light(R)(503R) each reflected blue light(B)(503B), green light(G) (503G), and red light(R) (503R) is formed of light of three band of blue(B)(503B), green (G)(503G), and red (G)(503G) which come out by projecting the first, second, and third transparent organic light emitting device, blue light(B)(501B), green light(G)(501G),and red light(R)(501R) radiated forward also project the first, second, and third transparent organic light emitting device and come out to the front substrate(851), so light of three band is mixed, therefore various light and white light can be observed.

[103] The lightness of the light radiated with each first, having in the multiple transparent organic light emitting device(777) second, and third transparent organic light emitting device(OLEDs)(350, 360, 370) can be independently controlled, therefore it is clear if the lightness of the individual first, second and third transparent organic light emitting device(350, 360, 370) is specifically controlled from corresponding input control signals, the pure white light of real three band can be observed on the front substrate(851).

[104] Actually, a trichromatic light comes out being mixed in advance but it is indicated being classified in figure 9, 10, and 11 for description.

[105] And each first, second, and third transparent organic light emitting devices(350,

360, 370) is examplified being separate for description, but the first, second, and third transparent organic light emitting devices (350, 360, 370), the front panel(851) and backplate(811) is completed by being adhered closely at most, arranged in stacked form and soldered.

[106] For the front panel(851) and backplate(811), a substrate can be used which is characterized that soft or pliable substrate such as PET, PES is adhered to one side or both- side of the second hard substrate for the front panel(851) and backplate(811),

[107] The encapsulation of the packaging type which can protect from the oxide material including moisture or oxygen etc. can be possible by positioning the front substrate(851) and rear substrate(811) in sandwich form, and the first, second, and third transparent organic light emitting devices(350, 360, 370) in the middle of those, adhering those closely each other in vacuum atmosphere in which moisture or oxygen is extremely limited, heating the girth of the rear substrate(811) and front substrate (851), thermally joining each other and sealing those.

[108] The present invention can be modified into various forms within the its structure, method and other essential feature widely described and claimed in the specification of the invention.

[109] The performed embodiment is only for an example, and is not limited to scope of the present invention is not limited to it.

[110] Therefore, the scope of the present invention is not specified in the above description but in claims.

[I l l] All changes within equivalence meaning and scope of claims is included in the scope of the present invention.

[112] The full- text of the other publication and the patent quoted in the present application is quoted as a reference is quoted for reference.

Advantageous Effects

[113] As described above, the present invention relates to the flat light emitting device by the multiple transparent organic light emitting device producing the substantial high brightness surface emitting, more particularly, to the organic light-emitting diode device of the surface light source which efficient various lights of changing countenance lights or the white light can be observed from the front side.

[114] Particularly, there is an effect which light source appropriate for a high brightness surface light source white light backlight unit(Backlight Unit: BLU) and lighting device of the various light of three band (changing countenance light) or white light illumination apparatus of three band is provided. [115] [116]

Brief Description of the Drawings

[117] Figure 1 shows an organic light-emitting DIODE (OLEDs) of prior art.

[118] Figure 2 is a schematic side view of transparent organic light emitting device according to the present invention.

[119] Figure 3 is a schematic side view of transparent organic light emitting device according to the present invention.

[120] Figure 4 is a schematic development view of the transparent organic light emitting device according to the present invention.

[121] Figure 4 is a schematic cross-sectional view of the transparent organic light emitting device according to the present invention.

[122] Figure 5 is the transparent organic light emitting device including a reflector according to the present invention.

[123] Figure 6 is a structure of the multiple transparent organic light emitting device performed according to the present invention.

[124] Figure 7 is a development view of the multiple transparent organic light emitting device performed according to the present invention.

[125] Figure 8 is a multiple transparent organic light emitting device meaning cross- sectional view performed according to the present invention.

[126] Figure 9 is a schematic side view of forward radiation in the flat light emitting

OELDs device which is performed according to the present invention.

[127] Figure 10 is a schematic side view of radiation by a reflector in the flat light emitting device which is performed according to the present invention.

[128] Figure 11 is a schematic side view of whole radiation in the flat light emitting device which is performed according to the present invention.

[129]

[130]

Industrial Applicability

[131] The flat light emitting device(OLEDs) according to the present invention has various potential applicability.

[132] It can be applied to the LCD back light(OLED BLU) of the surface light source and can be available for industrial use as wide range goodes including the device for displaying information, the LCD tele vis ion (LCD TV) apparatus, mobile phone, computer monitor, computer, personal digital assistant (PDAs), the vehicle, the TV monitor apparatus, printer, screen, advertising board, remote communications unit, traffic sign board, traffic sign, sound replay device, video camera, notebook computer, game console, digital camera, personal digital assistant (PDAs), electric and electronic appilance, electronics, building, construction material, vehicle, airplane, vehicle, illumination advertisement sign board, and the large area screen and bulletin board and the high brightness surface light source of the general lamp.

Claims

[1] A flat light emitting device(OLEDs) comprising the steps of: supplying seperatively a plurality of transparent organic light emitting devices including the first transparent organic light emitting device(TOLED) radiating the light of the blue(B), the second transparent organic light emitting device radiating the light of the green(G), and the third transparent organic light emitting device radiating the light of the red(R); supplying a form of the multiple transparent organic light emitting device by arranging the first, second, and third transparent organic light emitting devices in stacked form; positioning the light reflecting plate on the front side of the behind positioned rear substrate of the multiple both -side light emitting organic light-emitting diode device; positioning the light reflecting plate on the front side of the behind positioned rear substrate of the multiple transparent organic light emitting device; connecting and grounding ground electrode(GND) to each second auxiliary electrode of the first, second, and third transparent organic light emitting device; supplying seperatively each different electric power by connecting seperatively power supplies (VCC) to each first auxiliary electrode of the first, second, and third transparent organic light emitting device; and letting various three band lights (changing countenance light: true color) observed on front side.

[2] A flat light emitting device(OLEDs) of claim 1, comprising the step of diffusing blue light(B) of the first transparent organic light emitting device, green light(G) of the second transparent organic light emitting device, and red light(R) of the third transparent organic light emitting device and letting those project on rear surface; reflecting each light of blue light(B), green light(G), and red light(R) which is radiated on rear surface on a reflector and letting those project again and come out; letting each light of blue light(B), green light(G), and red light(R) of the first, second and third transparent organic light emitting device radiated on the front face and the step that each lights of the red light (R) come out to the front side come out to frontal surface; and letting various three band light in which blue light(B), green light(G), and the red light(R) which are reflected by the reflector are mixed with lights radiated to the front observed on a front substrate.

[3] A flat light emitting device(OLEDs) of claim 1, wherein the real white light of three band is observed on the front substrate by enhancing chromatic purity of white light by controlling separately the brightness of radiated light of the first transparent organic light emitting device radiating blue light(B) by means of controlling the amount of power supplied between the first and second auxiliary electrode of the first, second and third transparent organic light emitting devices, the second transparent organic light emitting device radiating green light(G) and the third transparent organic light emitting devices radiating red light(R).

[4] A flat light emitting device(OLEDs) of claim 1, wherein as to the array order of the first transparent organic light emitting device radiating blue light(B), the second transparent organic light emitting device radiating green light(G), and the third transparent organic light emitting device radiating red light(R), any other stacking array order of those is possible.

[5] A flat light emitting device(OLEDs) of claim 1, wherein if the organic layers of the organic layers of the first transparent organic light emitting device, radiating blue light(B) the second transparent organic light emitting device radiating green light(G), and the third transparent organic light emitting device radiating red light(R) is reversed, various three-band lights light (changing countenance light : true color) can be observed by comprising the step of connecting and grounding ground electrode(GND) to each first auxiliary electrode of the first, second and third transparent organic light emitting devices; and connecting seperatively power supplies(VCC) to each second auxiliary electrode and operating it by supplying each different electric power.

[6] A flat light emitting device(OLEDs) of claim 1, comprising the step of providing the vacuum atmosphere in which moisture or oxygen is extremely limited; inserting the first transparent organic light emitting device radiating blue light(B) the second transparent organic light emitting device radiating green light(G), and the third transparent organic light emitting device radiating red light(R) between the front substrate and rear substrate in sandwich form adhering those closely each other in stacked form in the vacuum atmosphere; heating the edge girth of the front substrate and the rear substrate adhered closely in stacked form by a predetermined method and squeezing those at predetermined pressure; encapsulating the girth of the rear substrate and front substrate heated by a predetermined method and squeezed at predetermined pressure by vacuum-sealing those.

[7] A flat light emitting device(OLEDs) of claim 1, wherein the front substrate is transparent.

[8] A flat light emitting device(OLEDs) of claim 1, wherein in the reflector of the rear substrate has high reflectivity of light.

[9] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include the flexible plastic.

[10] A flat light emitting device(OLEDs) of claim 1, wherein as to the front and the rear substrate, a flexible or soft substrate such as PES(polyethersulfone), PC (polycarbonate), PET(polyethylene terephthalate) and PEN(poly ethylene naphthalate) is attached on one side or both-side of the second hard substrate.

[11] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include a PET (polyethylene terephthalate).

[12] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include PES(polyethersulfone).

[13] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include PC(polycarbonate).

[14] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include PEN (poly ethylene naphthalate).

[15] A flat light emitting device(OLEDs) of claim 1, wherein the front and rear substrate include glass.

[16] An LCD back light(LCD BLU: Backlight Unit), wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[17] A lighting device, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[18] A device for displaying, wherein the flat light emitting device of claim 1 is introduced.

[19] An LCD television, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[20] A mobile phone, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[21] A computer monitor, wherein the flat light emitting device of claim 1 is introduced.

[22] A computer, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[23] A vehicle, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[24] A screen, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[25] An advertising board, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[26] A traffic sign board, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[27] A sound replay device, wherein the flat light emitting device of claim 1 is introduced.

[28] A video camera, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[29] A digital camera, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[30] A notebook computer, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[31] A game console, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[32] The personal digital assistant(PDAs), wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[33] An electrical appliance, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[34] An electronics, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[35] An electronic, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[36] A building, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[37] Construction materials, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[38] An airplane, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[39] A vehicle, wherein the flat light emitting device(OLEDs) of claim 1 is introduced.

[40] A transparent organic light emitting device comprising the step of providing the first substrate of a transparent organic light emitting device(TOLED) being comprised of the flat light emitting device(OLEDs) device of claim 1; providing the first transparent electrode formed on the first substrate of the substrate; providing the first auxiliary electrode which supplies power to the first transparent electrode and the middle of it is empty; making organic layers formed by stacking successively the hole implant layer, hole transporting layer, light-emitting layer, electron transport layer, electron injection layer which are formed on the upper side of the first transparent electrode and generate the light of the fixed wavelength band; providing the second substrate of both-side light emitting transparent organic light emitting device(TOLED); providing the second transparent electrode formed on the second substrate of the substrate; providing the second auxiliary electrode in which the middle of it is empty and power- supplies to the second transparent electrode on the second transparent electrode; mutually welding the top surface of the organic layers formed on the f irst transparent electrode and the second transparent electrode formed on the second substrate in vacuum atmosphere in which moisture or oxygen is extremely limited by a method including surface junction etc.; and generating radiation of the light of the fixed wavelength band through both sides of a transparent organic light emitting device(TOLED) by supplying power between the first and second auxiliary electrodes.

[41] A transparent organic light emitting device of claim 40, wherein the first and second transparent electrodes are the transparent electrode in which is composed of one or more selected in the group consisting of indium oxide(lnθ), indium- zinc-oxide(IZO), tin oxide(TO) and zirconium oxide(ZO) and visible light can be light-penetrated.

[42] A transparent organic light emitting device of claim 40, wherein the first and second transparent electrode are individually manufactured in a separate place in advance and are supplied.

[43] A transparent organic light emitting device of claim 40, wherein before the first and second transparent electrode are welded with organic layers, the transparent electrode which is composed of one or more selected among the group consisting of tin oxide(ITO), indium oxide(lnθ), indium-zinc-oxide(IZO), and the tin oxide(TO) and zirconium oxide(ZO) and the visible light can be light-penetrated is formed.

[44] A transparent organic light emitting device of claim 40, wherein the first and second transparent electrode are empty.

[45] A transparent organic light emitting device of claim 40, wherein the first and second transparent electrode are coated with conductivity polymer organic compound.

[46] A transparent organic light emitting device of claim 40, wherein the first and second substrate are transparent.

[47] A transparent organic light emitting device of claim 40, wherein the first and second substrate include flexible plastics.

[48] A transparent organic light emitting device of claim 40, wherein the first and second substrate include glass.

[49] A transparent organic light emitting device of claim 40, wherein as to the first and second substrate include glass, a substrate which can be flexible or is flexible such as PES (poly ethersulf one), PC(polycarbonate), PET(polyethylene terephthalate) and PEN (poly ethylene naphthalate) is attached on one side or both sides of the second hard substrate.

[50] A transparent organic light emitting device of claim 40, wherein the first and second substrate include PET (polyethylene terephthalate).

[51] A transparent organic light emitting device of claim 40, wherein the first and second substrate include PES (poly ethersulf one).

[52] A transparent organic light emitting device of claim 40, wherein the first and second substrate include PEN (poly ethylene naphthalate).

[53] A transparent organic light emitting device of claim 40, wherein the first and second substrate include PC(polycarbonate).