CN1725917A - Display device and electronic apparatus - Google Patents

Display device and electronic apparatus Download PDF

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Publication number
CN1725917A
CN1725917A CN 200510084421 CN200510084421A CN1725917A CN 1725917 A CN1725917 A CN 1725917A CN 200510084421 CN200510084421 CN 200510084421 CN 200510084421 A CN200510084421 A CN 200510084421A CN 1725917 A CN1725917 A CN 1725917A
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pixel
sub
layer
viewing area
light
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CN 200510084421
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Chinese (zh)
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山田正
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Seiko Epson Corp
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Seiko Epson Corp
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Abstract

A display device includes a display region, and the display region has a first display region that is composed of a first pixel group displaying a first light-emitting wavelength range; and a second display region that is composed of a second pixel group displaying a second light-emitting wavelength range different from the first light-emitting wavelength range.

Description

Display unit, e-machine
Technical field
The present invention relates to the invention of display unit, e-machine.
The application advocates priority 2004-215328 number for Japanese patent application 2004-215326 number of filing an application on July 23rd, 2004 and at the Japanese patent application that on July 23rd, 2004 filed an application, and quotes its content at this.
Background technology
The self-luminous display device of organic El device representative need not the back lamp, pretends to display unit that can slimming and is attracted attention.Such organic El device, for example the spy open in 2002-No. 252083 communiques disclosed like that, sub-pixel of all kinds (least unit of demonstration) with red (R), green (G), blue (B) in the viewing area is arranged in band shape, and 3 sub-pixels can carry out the full color demonstration as a pixel.
Above-mentioned spy opens disclosed display unit in the 2002-252083 communique, constitutes by each common pixel in the viewing area and similarly carries out full color and show.Such formation, be suitable for the irrelevant and occasion of carrying out the demonstration of constant of the time integral value of the brightness in the viewing area as TV and pixel, but under the occasion of time integral value because of the different demonstration of each pixel of opposite brightness in carrying out the viewing area, just there is the situation that following problem takes place.That is, 1) the big color pixel of time integral value of brightness, its deterioration in brightness is faster than the progress of other colors; 2) owing to the big color pixel of time integral value of brightness, its deterioration in brightness takes place early therefore, to destroy white balance as a whole relatively, produces tone reversal, perhaps causes easily and burns trace (burning a pair I); 3) in desire will be carried out the monochromatic zone that shows, if when having 3 sub-pixels that full color uses, then aperture opening ratio reduces, and the deterioration in brightness of monochromatic display part becomes faster.
Summary of the invention
The present invention is In view of the foregoing and the invention of carrying out, and its purpose is to provide and can addresses the above problem comprehensively, thereby improves display quality, and then, the display unit that prolongs the quality life-span.Have again, the object of the present invention is to provide to have the e-machine that can carry out the display unit of such high-quality display.
The present invention possesses the viewing area that is made of a plurality of pixels, and described viewing area possesses: the 1st viewing area that is made of the 1st pixel group that shows the 1st emission wavelength scope; With the 2nd viewing area that constitutes by the 2nd pixel group that shows the 2nd emission wavelength scope different with described the 1st emission wavelength scope.Also having, is to mean that the 1st emission wavelength scope is not identical wave-length coverage with the 2nd emission wavelength scope mutually here, and it is as long as two scopes are not identical, and the scope of not getting rid of a side is contained in the situation of the opposing party's scope.
Display unit of the present invention, different at the 1st pixel group of the 1st viewing area with emission wavelength scope at the 2nd pixel group of the 2nd viewing area, but the scope of glow color (kind) difference just.
Thereby, with the viewing area of display unit outfit of the present invention, but be split into the 1st viewing area and the 2nd viewing area that Show Color has nothing in common with each other at least, can improve the design freedom of viewing area thus.
In addition, in this case, set the pixel of the light that can send required color on the regulation zone in the viewing area, and, in respective regions, can get rid of and not need color pixel, so can improve aperture opening ratio as a whole.Promptly, in formation in the past, because set the pixel of full color demonstration usefulness too in the zone of for example carrying out monochromatic demonstration, so unavoidable the generation owing to having do not need the related pixel of color to cause aperture opening ratio to reduce, but in the present invention, got rid of and do not needed the related pixel of color, can solve the problem that aperture opening ratio reduces thus.
In addition, by only by needing color pixel to constitute the viewing area of regulation, with in the past like that in whole viewing area the configuration full color compare with the situation of pixel, even if the brightness of average per 1 pixel descends, also can obtain the surface brightness with described same degree in the past, thereby, the deterioration in brightness of average per 1 pixel can be reduced, reduce consumed power, thereby can prolong the brightness life-span.
In addition, display unit of the present invention has also improved resolution.That is, compare, can be increased in the pixel number of color that needs in the regulation zone, thereby can play effect the raising of resolution with the situation of the picture pixel that the configuration full color was used in whole viewing area in the past.
In display unit of the present invention, can be that described the 1st pixel group is made of the pixel that can show multiple color of light, and described the 2nd pixel group be made of the pixel that can show a kind of color of light.In this case, can in the 1st viewing area, carry out the demonstration more than 2 looks, and in the 2nd viewing area, can carry out the monochrome demonstration.And, especially in the 2nd viewing area, compare and be equipped with the situation that full color shows the pixel of usefulness in the past like that, can realize the raising of aperture opening ratio, the raising of resolution, brightness life-time dilatation.Specifically, constitute described the 1st pixel group with the pixel that comprises the sub-pixel that can send specified color light at least and can send with the sub-pixel of described specified color different colours light, and constitute the 2nd pixel group by the pixel that comprises 1 sub pixel that can send specified color light.
Can constitute described the 1st pixel group by the pixel that can carry out the full color demonstration, and constitute described the 2nd pixel group by carrying out the monochromatic pixel that shows.Specifically, can be by comprising that sub-pixel, the sub-pixel that can send green light that can send red light, the pixel that can send the sub-pixel of blue light constitute described the 1st pixel group, and by comprise from sub-pixel, the sub-pixel that can send green light that can send red light, can send blue light sub-pixel the pixel of the sub-pixel below 2 kinds selected constitute described the 2nd pixel group.
Have under the occasion of multiple sub-pixel as mentioned above, each sub pixel can constituted with identical size respectively.In this case, can adjust aperture opening ratio according to the quantity of the sub-pixel that forms the viewing area, easy thereby the design of aperture opening ratio becomes.Also have, preferably sub-pixel is formed rectangular shape, and pixel is constituted the square shape of the sub-pixel that comprises several these rectangular shape.
E-machine of the present invention possesses above-mentioned display unit.According to such e-machine, can provide high-quality demonstration at its display part.
Other form of the present invention is the display unit that possesses the viewing area that is made of a plurality of pixels, described pixel is made of the duplexer that a plurality of functional layers are formed respectively, on the other hand, described viewing area possesses: the 1st viewing area is made of the 1st pixel group that shows the 1st emission wavelength scope; With the 2nd viewing area, constitute by the 2nd pixel group that shows the 2nd emission wavelength scope different with described the 1st emission wavelength scope.Constitute the 1st pixel and the 2nd pixel that constitutes described the 2nd pixel group, the lit-par-lit structure difference of mutual described functional layer of described the 1st pixel group.Here be to mean that the 1st emission wavelength scope is not identical wave-length coverage with the 2nd emission wavelength scope mutually, it is as long as two scopes are not identical, and the scope of not getting rid of a side is contained in the situation of the opposing party's scope.
Display unit of the present invention like this, different at the 1st pixel group of the 1st viewing area with emission wavelength scope at the 2nd pixel group of the 2nd viewing area, but the scope of glow color (kind) difference just.
Thereby, with the viewing area of display unit outfit of the present invention, but be split into the 1st viewing area and the 2nd viewing area that Show Color has nothing in common with each other at least, can improve the design freedom of viewing area thus.
In this case, set the pixel of the light that can send required color on the regulation zone in the viewing area, and, in respective regions, can get rid of and not need color pixel, so can improve aperture opening ratio as a whole.Promptly, in formation in the past, because set the pixel of full color demonstration usefulness too in the zone of for example carrying out monochromatic demonstration, so unavoidable the generation owing to having do not need the related pixel of color to cause aperture opening ratio to reduce, but in the present invention, got rid of and do not needed the related pixel of color, can solve the problem that aperture opening ratio reduces thus.
In addition, by only by needing color pixel to constitute the viewing area of regulation, with in the past like that in whole viewing area the configuration full color compare with the situation of pixel, even if the brightness of average per 1 pixel descends, also can obtain the surface brightness with described same degree in the past, thereby, the deterioration in brightness of average per 1 pixel can be reduced, reduce consumed power, thereby can prolong the brightness life-span.
In addition, display unit of the present invention has also improved resolution.That is, compare, can be increased in the pixel number of color that needs in the regulation zone, thereby can play effect the raising of resolution with the situation of the picture pixel that the configuration full color was used in whole viewing area in the past.
In the formation that the viewing area is cut apart according to every kind of glow color, make the lit-par-lit structure of the functional layer that constitutes pixel inequality like this according to each zone of cutting apart.In general send the light color difference and then carry out also difference of luminous institute energy requirement, therefore, each pixel there is preferred formation respectively, but under as the situation that was setting the pixel that full color uses on the whole viewing area in the past, it is inequality that pixel is constituted, and this wastes time and energy very much.Yet, changed the viewing area because of cutting apart in the present invention, so need only the lit-par-lit structure difference that makes functional layer according to each viewing area, can realize being suitable for lit-par-lit structure of all kinds easily.
By making functional layer regional and different, can adopt the lit-par-lit structure of the illuminant colour that is fit to this pixel, thereby, can also prolong the brightness life-span like this except can the raising of luminous efficiency being played the contribution effect according to each.
In this display unit, can be that described the 1st pixel group is made of the pixel that can show multiple color of light, and described the 2nd pixel group be made of the pixel that can show a kind of color of light.In this case, can in the 1st viewing area, carry out the demonstration more than 2 looks, and in the 2nd viewing area, can carry out the monochrome demonstration.And, especially in the 2nd viewing area, compare and be equipped with the situation that full color shows the pixel of usefulness in the past like that, can realize the raising of aperture opening ratio, the raising of resolution, brightness life-time dilatation.Specifically, constitute described the 1st pixel group with the pixel that comprises the sub-pixel that can send specified color light at least and can send with the sub-pixel of described specified color different colours light, and constitute the 2nd pixel group by the pixel that comprises 1 sub pixel that can send specified color light.
Further, can constitute described the 1st pixel group, and constitute described the 2nd pixel group by carrying out the monochromatic pixel that shows by the pixel that can carry out the full color demonstration.Specifically, can be by comprising that sub-pixel, the sub-pixel that can send green light that can send red light, the pixel that can send the sub-pixel of blue light constitute described the 1st pixel group, and by comprise from sub-pixel, the sub-pixel that can send green light that can send red light, can send blue light sub-pixel the pixel of the sub-pixel below 2 kinds selected constitute described the 2nd pixel group.
Have under the occasion of multiple sub-pixel as mentioned above, each sub pixel can constituted with identical size respectively.In this case, can adjust aperture opening ratio according to the quantity of the sub-pixel that forms the viewing area, easy thereby the design of aperture opening ratio becomes.Also have, preferably sub-pixel is formed rectangular shape, and pixel is constituted the square shape of the sub-pixel that comprises several these rectangular shape.
As the functional layer that display unit of the present invention has, can use the functional layer of the organic EL layer that is equipped with cathode layer, anode layer and between this negative electrode and anode, forms.At this moment, can constitute described the 1st pixel group by the 1st pixel that comprises the sub-pixel that can send blue light, and by comprising the sub-pixel that can send red light but the 2nd pixel that does not comprise the sub-pixel that can send blue light constitutes the 2nd pixel group, the cathode layer that constitutes the functional layer of described the 1st pixel comprises lithium fluoride, and the cathode layer that constitutes the functional layer of described the 2nd pixel does not comprise lithium fluoride.
The organic EL layer that becomes light emitting functional layer is according to the difference of each illuminant colour and the luminous efficiency difference.Especially, send the organic EL layer of red light and the organic EL layer of the light that sends blueness and differ widely, the therefore preferred cathode layer formation that suits that disposes respectively according to the difference luminous efficiency on the cathode layer formation.Specifically, comprise lithium fluoride, can improve the luminous efficiency of blue organic EL layer, and how much reduce the luminous efficiency of red organic EL layer on the other hand by making cathode layer.Therefore, under situation as cutting apart of the present invention viewing area, it is different to be easy to by described each quilt viewing area of cutting apart cathode layer to be constituted, specifically, to the viewing area that constitutes by the 1st pixel that comprises blue sub-pixel and by comprising red sub-pixel and not comprising the viewing area that the 2nd pixel of blue sub-pixel constitutes, can be easily the cathode layer of each pixel be constituted and be made as difference, and then can easily improve luminous efficiency.
Be equipped with under the situation of organic EL layer as functional layer as mentioned above, can constitute the 1st pixel group by the 1st pixel that comprises the sub-pixel that can send red light, can send the sub-pixel of green light and can send the sub-pixel of blue light, and constitute the 2nd pixel group by the 2nd pixel that comprises the sub-pixel that can send red light, the cathode layer that constitutes the functional layer of described the 1st pixel comprises lithium fluoride, does not constitute this display unit and the cathode layer that constitutes the functional layer of described the 2nd pixel does not comprise lithium fluoride.In this case also can be as last note, easily the cathode layer of each pixel is constituted and be set as inequalityly, and then can easily improve luminous efficiency.
In addition, constitute, can make the cathode layer of the functional layer that constitutes described the 1st pixel have the compound structure of lithium fluoride, calcium and aluminium, and the cathode layer that constitutes the functional layer of described the 2nd pixel has the compound structure of calcium and aluminium as concrete cathode layer.
E-machine of the present invention possesses above-mentioned display unit.According to such e-machine, can provide high-quality demonstration with the high life at its display part.
Description of drawings
Fig. 1 is the circuit diagram about the organic El device of embodiments of the present invention.
Fig. 2 is the plane structure chart of organic El device shown in Figure 1.
Fig. 3 is the plane structure chart about the pixel of the 1st viewing area.
Fig. 4 is the plane structure chart about the pixel of the 2nd viewing area.
Fig. 5 is the figure that the section of expression the 1st viewing area constitutes.
Fig. 6 is the figure that the section of expression the 2nd viewing area constitutes.
Fig. 7 is that expression changes in time about the brightness among the embodiment 1 and the brightness time history plot in comparative example.
Fig. 8 is the figure of explanation about the manufacture method of execution mode.
Fig. 9 is the figure of explanation about the manufacture method of execution mode.
Figure 10 is the figure of explanation about the manufacture method of execution mode.
Figure 11 is the figure of explanation about the manufacture method of execution mode.
Figure 12 is the figure of explanation about the manufacture method of execution mode.
Figure 13 is the process chart about the 1st viewing area of the manufacture method in the relevant execution mode of explanation.
Figure 14 is the process chart about the 2nd viewing area of the manufacture method in the relevant execution mode of explanation.
Figure 15 is the process chart about the 1st viewing area of the manufacture method in the relevant execution mode of explanation.
Figure 16 is the process chart about the 2nd viewing area of the manufacture method in the relevant execution mode of explanation.
Figure 17 is the plane structure chart about the shower nozzle of embodiments of the present invention.
Figure 18 is the plane structure chart about the inkjet head device of embodiments of the present invention.
Figure 19 is the plane graph of an example of the expression substrate that constitutes the display part be installed on e-machine.
Figure 20 is the profile that the section of the substrate of expression formation display part shown in Figure 19 constitutes.
Figure 21 is the plane graph of expression about the formation of the viewing area of display part shown in Figure 19.
Figure 22 is the plane graph of an example of expression e-machine.
Figure 23 is the plane graph of a variation of the expression substrate that constitutes the display part be installed on e-machine.
Figure 24 is the plane graph of an example of expression e-machine.
Figure 25 is the figure that the section of the 1st viewing area of relevant the 2nd execution mode of the present invention of expression constitutes.
Figure 26 is the figure of expression about the section formation of the 2nd viewing area of the 2nd execution mode of the present invention.
Figure 27 is that the brightness that is illustrated among the embodiment 2 changes and the brightness time history plot in comparative example in time.
Figure 28 is illustrated in the time dependent different curve chart of brightness when having or not the lithium fluoride layer on the 2nd viewing area.
Figure 29 is the process chart about the 1st viewing area of the manufacture method in relevant the 2nd execution mode of explanation.
Figure 30 is the process chart about the 2nd viewing area of the manufacture method in relevant the 2nd execution mode of explanation.
Embodiment
Below, to as the organic El device of the 1st and the 2nd execution mode of display unit of the present invention with and the manufacture method of organic El device, the limit describes with reference to the accompanying drawing limit.Also have, in each figure, because each layer and each parts are set as the size of the degree that can discern on drawing, so different according to each layer or its engineer's scale of each parts.
(organic El device)
Fig. 1 is that key diagram, Fig. 2 of Wiring structure of the organic El device of expression present embodiment is that floor map, Fig. 3 and Fig. 4 of the organic El device of expression present embodiment is the floor map of amplifying the formation of remarked pixel.Fig. 5 and Fig. 6 are the generalized sections of viewing area of the organic El device of expression present embodiment.
As shown in Figure 1, the organic El device of present embodiment, wiring constitutes respectively: a plurality of scan lines 101; At the upwardly extending a plurality of holding wires 102 in side that intersect with scan line 101; At the side upwardly extending a plurality of power lines 103 arranged side by side with holding wire 102, and, near the viewing area P of the unit of being provided with each crosspoint of scan line 101 and holding wire 102.
Be connected with data side drive circuit 104 on the holding wire 102, described data side drive circuit 104 has shift register, level shifter, video line and analog switch.In addition, scan line 101 is connected with scan-side drive circuit 105, and described scan-side drive circuit 105 has shift register and level shifter.
And then constituent parts viewing area P is provided with: the switch thin-film transistor 122 that sweep signal is supplied to gate electrode by scan line 101; Keep by this switch maintenance electric capacity cap of thin-film transistor 122 from the picture element signal of holding wire 102 supplies; To supply to the driving thin-film transistor 123 of gate electrode by the picture element signal that described maintenance electric capacity cap keeps; Flow into the pixel electrode (electrode) 111 of drive current when being electrically connected with power line 103 with thin-film transistor 123 by described power line 103 by described driving; And be clipped in organic EL layer 110 between described pixel electrode 111 and the cathode layer (opposite electrode) 12.Constitute light-emitting component by electrode 111 and opposite electrode 12 and organic EL layer 110.
If driven sweep line 101 makes switch thin-film transistor 122 conductings, the current potential of the holding wire 102 of this moment will be maintained at and keep electric capacity cap, and drive the conduction and cut-off state of using thin-film transistor 123 according to the state decision of described maintenance electric capacity.Also have, electric current will be situated between and flow to pixel electrode 111 by the raceway groove that drives with thin-film transistor 123 from power line 103, and then Jie flows to cathode layer 12 by organic EL layer 110.In organic EL layer 110, produce luminous according to the magnitude of current that flows through.
The organic El device of present embodiment as Fig. 5, shown in Figure 6, has: the transparent substrate 2 that is made of glass etc.; The light-emitting component portion 11 of the light-emitting component that possesses the matrix shape of being configured to that on substrate 2, forms; With the cathode layer 12 that in light-emitting component portion 11, forms.Constitute display element 10 by light-emitting component portion 11 and cathode layer 12 here.Substrate 2 is transparency carriers of glass etc. for example, as shown in Figure 2, be divided into the central authorities that are positioned at substrate 2 viewing area 2a, be positioned at the non-display area 2c of encirclement viewing area 2a of the surrounding edge of substrate 2.
Viewing area 2a is the zone that is formed by the light-emitting component that is configured to matrix shape, minimum with a plurality of demonstrations drives unit, it is the point (sub-pixel) that can send one of redness (R), green (G), blue (B) each coloured light that the minimum of this demonstration drives unit, and described each point constitutes the viewing area P of unit as shown in Figure 1.Also have, in the present embodiment, viewing area 2a constitutes: carry out the 1st viewing area 21 of full color demonstration, the 2nd viewing area 22 of carrying out monochromatic demonstration.On the 1st viewing area 21, as shown in Figure 3, be arranged with a plurality of pixel A, described pixel A is made of the R point A1 of the light that can send redness (R), the G point A2 that can send the light of green (G), the point of 3 kinds of different colors of B point A3 that can send the light of blueness (B).In addition, on the 2nd viewing area 22, as shown in Figure 4, be arranged with a plurality of pixel A ', described A ' comprises the R point A1 of 3 light that can send redness (R) and constitutes.
In a word, on the 2a of viewing area, A, A ' are configured to predetermined arrangement, described pixel A, A ' can be luminous the wave-length coverage difference, and, pixel A can carry out the full color wave-length coverage (general 380nm's～780nm) is luminous, pixel A ' (general 580nm's～780nm) is luminous can to carry out red wave-length coverage.Also have, to constitute the 1st viewing area 21 that can show full color by the viewing area that the 1st pixel group constitutes, described the 1st pixel group comprises a plurality of pixel A with predetermined pattern, the viewing area that the 2nd pixel group is constituted constitutes and can show the 2nd red viewing area 22 on the other hand, and described the 2nd pixel group comprises a plurality of pixel A with predetermined pattern '.Also have, as shown in Figures 3 and 4, each point (sub-pixel) A1, A2, A3 are respectively identical rectangular shape, and are made of area identical, and each pixel A, A ' constitute roughly square shape respectively.
Return Fig. 2, wiring has described power line 103 (103R, 103G, 103B) on non-display area 2c.Dispose described scan-side drive circuit 105 in the both sides of viewing area 2a.And then, be provided with the drive circuit that is connected with scan-side drive circuit 105 in the both sides of scan-side drive circuit 105 with control signal wiring 105a and drive circuit power-supply wiring 105b.Dispose the quality of carrying out manufacture process or the goods display unit when dispatching from the factory, the check circuit 106 of defect inspection at the diagram upside of viewing area 2a.
Fig. 5 is the sectional structure chart of the 1st viewing area 21, and described the 1st viewing area 21 is to be made of aforesaid 3 kinds of points (sub-pixel) A1, A2, A3.
In the 1st viewing area 21, on substrate 2 stacked above one another, constitute: form circuit such as TFT circuit element portion 14, form the light-emitting component portion 11 and the cathode layer 12 of organic EL layer 110, and, penetrate to light transmission circuit element portion 14 that substrate 2 sides are sent and substrate 2 downside (observer's side) from organic EL layer 110 towards substrate 2, and reflected by cathode layer 12 to the light that the opposition side of substrate 2 sends from organic E1 layer 110, see through circuit element portion 14 and substrate 2 and penetrate towards the downside (observer's side) of substrate 2.
Also have,,, the light that sends from the cathode layer side is penetrated if adopt material transparent as above-mentioned cathode layer 12.As transparent cathode layer materials, can list ITO (indium tin oxide), Pt, Ir, Ni or Pd.
In circuit element portion 14, form the base protective film 2 that constitutes by silicon oxide layer on the substrate 2, and on described base protective film 2c, be formed with the semiconductor film 141 of the island that constitutes by polysilicon.In semiconductor 141, inject formation source region 141a and drain region 141b by the high concentration phosphorus ion.The part that does not import described phosphonium ion will become channel region 141c.
In addition; form the transparent gate insulating film 142 that covers described base protective film 2c and semiconductor film 141; on gate insulating film 142, be formed with the gate electrode 143 (scan line 101) that constitutes by Al, Mo, Ta, Ti, W etc., on gate electrode 143 and gate insulating film 142, be formed with the 1st transparent interlayer dielectric 144a and the 2nd interlayer dielectric 144b.Gate electrode 143 is arranged on the channel region 141c adjoining position with semiconductor film 141.In addition, run through the 1st, the 2nd interlayer dielectric 144a, 144b, form respectively and the source of semiconductor 141, the contact hole 145,146 that drain region 141a, 141b are connected.
Also have, on the 2nd interlayer dielectric 144b, will form the regulation shape by transparent pixel electrode 111 patternings that ITO etc. constitutes, and a side contact hole 145 is connected with this pixel electrode 111.In addition, the contact hole 146 with the opposing party is connected with power line 103.Like this, in circuit element portion 14, be formed with the driving thin-film transistor 123 that is connected with each pixel electrode 111.
Light-emitting component portion 11 to be to constitute as main body with the lower part, that is: respectively at organic EL layer 110 stacked on a plurality of pixel electrodes 111 and be provided in being used between each pixel electrode 111 and the organic EL layer 110 and divide the wall part 112 of each organic EL layer 110.On organic EL layer 110, dispose cathode layer 12.Constitute light-emitting component by these pixel electrodes 111, organic EL layer 110 and cathode layer 12.Here, pixel electrode 111 is to be formed by for example ITO, and pattern to form plan view shape be essentially rectangular.Shape with these each pixel electrodes 111 of cutting is equipped with wall part 112.
Wall part 112 has the formation of stacked inorganic matter next door layer (the 1st next door layer) 112a and organic substance next door layer (the 2nd next door layer) 112b as shown in Figure 5, and wherein inorganic matter next door layer (the 1st next door layer) 112a is as the 1st wall part that is in the position of substrate 2 sides; Organic substance next door layer (the 2nd next door layer) 112b is as the 2nd wall part that is in away from the position of substrate 2.Inorganic matter next door layer 112a is by for example TiO 2Or SiO 2Wait to form, organic substance next door layer 112b waited by for example allyl resin, polyimide resin to constitute.
Inorganic matter, organic substance next door layer 112a, 112b are formed mode on the periphery of pixel electrode 111.Overlook and see, become the configuration be pixel electrode 111 around with the partly overlapping structure of inorganic matter next door layer 112a.In addition, organic substance next door layer 112b is also identical, and configuration is the overlapping mode of a part of overlooking with pixel electrode 111.In addition, inorganic matter next door layer 112a forms than the marginal end of organic substance next door layer 112b and also gives prominence to the more center side of pixel electrode 111.Like this, by form each the 1st laminated section (protuberance) 112e of inorganic matter next door layer 112a in the inboard of pixel electrode 111, be provided with the 112c of lower openings portion with the formation position adjacency of pixel electrode 111.
In addition, on organic substance cofferdam layer 112b, be formed with the 112d of upper opening portion.The 112d of this upper opening portion is set makes it formation position and the 112c of lower openings portion adjacency with pixel electrode 111.The 112d of upper opening portion forms, and is wideer than the 112c of lower openings portion opening as shown in Figure 5, and narrower than pixel electrode 111.In addition, also exist the end of the position on the top form the 112d of upper opening portion and pixel electrode 111 to become the situation of roughly the same position.In this case, as shown in Figure 5, the section of the 112d of upper opening portion of organic substance next door layer 112b is skewed.Like this, in the next door portion 112, be formed with the peristome 112g that 112c of lower openings portion and the 112d of upper opening portion are communicated with.
In addition, be formed with zone that shows lyophily and the zone that shows lyophobicity in the next door portion 112.The zone that shows lyophily is the 1st laminated section 112e of inorganic matter next door layer 112a and the electrode surface 111a of pixel electrode 111, to these zones, is lyophily by oxygen is come surface treatment as the plasma treatment of handling gas.In addition, the zone that shows lyophobicity is the wall of the 112d of upper opening portion and the top 112f of organic substance next door layer 112, to these zones, by methane tetrafluoride (methane tetrafluoride), tetrafluoromethane (tetrafluomethane) or carbon tetrafluoride are come fluorination treatment (lyophobicity processing) surface as the plasma treatment of handling gas.
Organic EL layer 110 is by at hole injection/transport layer 110a stacked on the pixel electrode 111 with abut against the luminescent layer 110b that forms on the injection/transport layer 110a of hole and constitute.
Hole injection/transport layer 110a has the function to luminescent layer 110b injected hole, and has the function in injection/transport layer 110a internal transmission hole, hole.By such hole injection/transport layer 110a being arranged between pixel electrode 111 and the luminescent layer 110b element characteristics such as the luminous efficiency of raising luminescent layer 110b, life-span.In addition, in luminescent layer 110b, from hole injection/transport layer 110a injected holes with combine again from cathode layer 12 injected electrons, carry out luminous.
Hole injection/transport layer 110a is made of par 110a1 on the pixel electrode face that the is formed on 111a that is positioned at the 112c of lower openings portion and the 110a2 of surrounding edge portion that is positioned on the 1st laminated section 112e that is formed on inorganic matter next door layer of the 112d of upper opening portion.In addition, hole injection/transport layer 110a, textural be to be positioned on the pixel electrode 111, and only be formed on (112c of lower openings portion) (mode that only is formed on aforesaid par is also arranged) between the layer 112a of inorganic matter next door.
In addition, luminescent layer 110b is that the par 110a1 and the 110a2 of surrounding edge portion that stride across hole injection/transport layer 110a go up and form, and the thickness on the 110a1 of par is the scope of 50nm～80nm.Luminescent layer 110b has the red light emitting layer 110b1 of the light of redness sent (R), green (G) the luminescent layer 110b2 of light that sends green (G) and 3 kinds of blue light-emitting layer 110b3 that send the light of blueness (B), and it is banded that each luminescent layer 110b1～110b3 is when being configured to overlook.
Also have, form material, can use mixtures such as poly-thiophene amphyls such as for example gathering ethylidene dioxy thiophene and polystyrolsulfon acid as hole injection/transport layer.
In addition, as the material of luminescent layer 110b, for example can use (gathering) to use rubrenes, perillene, 9,10-diphenylanthrancene, tetraphenylbutadiene, Nile red, coumarin 6, quinoline bifurcation ketone etc. to phenylene vinylidene derivative, polyphenylene derivative, poly-fluorene derivative, polyvinylcarbazole, polythiofuran derivative, perillene class pigment, Coumarins pigment, rhodamine class pigment or adding to these macromolecular materials.
Cathode layer 12 is formed on whole of light-emitting component portion 11, and with pixel electrode 111 pairings, play the effect that makes electric current flow through organic EL layer 110.This cathode layer 12 is stacked for example calcium layer and aluminium lamination and constitute.At this moment, it is low preferably to be set to work function at the cathode layer of the near side of distance luminescent layer, and especially in this mode, cathode layer plays with luminescent layer 110b and directly contacts the effect of luminescent layer 110b being injected electronics.
The situation that the LiF that is formed for improving luminous efficiency between luminescent layer 110b and cathode layer 12 is also arranged in addition.Also have, red and green luminescent layer 110b1,110b2 are not limited to lithium fluoride, also can adopt other material.That is, can be that blueness (B) luminescent layer 110b3 forms the layer that is made of lithium fluoride this moment, and the material outside other redness and the stacked lithium fluoride of green light emitting layer 110b1,110b2.In addition, can on red and green luminescent layer 110b1,110b2, not form yet lithium fluoride, only form calcium.
In addition, the aluminium that forms cathode layer 12 is the part that the light that will send from luminescent layer 110b reflexes to substrate 2 sides, except that the aluminium film, preferably is made of silverskin, aluminium and silver-colored stacked film.And then, on aluminium, can be provided with by SiO, SiO 2, formation such as SiN the protective layer that is used for anti-oxidation.
In light-emitting component portion 11 shown in Figure 5, in the organic El device of reality, has sealing.This sealing can form in the following manner, promptly for example around substrate 2 the sealing resin coating is ring-type, and then is sealed by can.Described sealing resin is to be made of thermosetting resin or ultraviolet hardening resin etc., especially preferredly is, is made of a kind epoxy resin of thermosetting resin.The purpose that this sealing is set is to prevent cathode layer 12 or is formed on the oxidation of the luminescent layer in the light-emitting component portion 11.In addition, the absorbent that absorbs water, oxygen etc. can also be set in the inboard of described can, to absorb water or the oxygen that infiltrates can inside.
Fig. 6 is the sectional structure chart of the 2nd viewing area 22, and only point (sub-pixel) A1 by redness constitutes.Also have, in the 2nd viewing area 22, just the formation of luminescent layer 110b is different with as shown in Figure 5 the 1st viewing area 21, and that other section constitutes is identical, the Therefore, omited explanation.
In the 2nd viewing area 22,3 red some A1 constitute 1 pixel, and in each A1, the red light emitting layer 110b1 of redness (R) light is sent in configuration.
Also have, also have in the 1st viewing area 21, between luminescent layer 110b and cathode layer 12, be formed for improving the situation of the LiF of luminous efficiency.But in described the 2nd viewing area 22, because may luminous efficiency can reduce, so preferably do not form LiF.
According to the organic El device of the present embodiment with aforesaid structure, viewing area 2a constitutes by can carrying out the 1st viewing area 21 that full color shows and be merely able to carry out monochromatic the 2nd viewing area 22 that shows.In this case, on the whole zone of viewing area 2a, do not set the pixel that full color is used because be, but on the zone (the 2nd viewing area 22) of regulation, set the pixel that to send the light that needs color, and eliminating does not need color pixel on this zone 22, so can improve aperture opening ratio on the whole.Also have, constitute regulation zone (the 2nd viewing area 22) by such a color pixel by needs, make and compare with the situation of the pixel that the configuration full color was used on whole viewing area 2a like that in the past, even reduce the brightness of average per 1 pixel, also can access and the surface brightness of same degree in the past, thereby, the deterioration in brightness of average per 1 pixel reduced, consumption electric power can be reduced, and then the brightness life-span can be prolonged.
Specifically, life-saving as shown in Figure 7.Fig. 7 is shown brightness (comparative example) under the situation that the pixel of usefulness constitutes, is represented its time history plot by full color about the brightness (embodiment) in the 2nd viewing area 22 of the organic El device in the present embodiment with whole viewing area.Also have, the longitudinal axis is represented the surface brightness (cd/cm of average per 1 pixel 2), transverse axis express time (hour).
As shown in Figure 7, according to the organic El device in the present embodiment,, access initial value 300cd/m pixel being set at 1 pixel energy about the organic El device of embodiment 1 and comparative example 2The occasion of surface brightness under, make brightness become time of 80% of initial value, be 8000 hours in comparative example relatively, be 40000 hours in embodiment 1.That is, owing to introduce the formation of present embodiment, the deterioration time of brightness has become about 5 times.
In addition, the organic El device of present embodiment has also improved resolution.That is, compare in the situation of whole viewing area 2a with the pixel arrangement that full color is shown usefulness, can be increased in the regulation zone (the 2nd viewing area 22) needs the pixel number of color amount, thereby can improve resolution.
Also have, in the present embodiment, constitute the 1st viewing area 21 for the full color demonstration is used, the 2nd viewing area 22 is the monochromatic usefulness that shows, show that for full color with, the 2nd viewing area 22 be that two looks show usefulness but for example also can constitute the 1st viewing area 21, or to constitute the 1st viewing area 21 be that two looks show with, the 2nd viewing area 22 and are the monochromatic usefulness that shows.In addition, also can show and use the use white luminescent material, make the light of its look that turns white in monochrome.Thus, can constitute have a lot of variation patterns the viewing area in 2a.
(manufacture method of organic El device)
Then, describe with reference to accompanying drawing for the method for making above-mentioned organic El device.
The manufacture method of present embodiment comprises: (1) wall part forms operation, (2) hole injection/transport layer forms operation, (3) luminescent layer formation operation, (4) cathode layer formation operation and (5) sealing process etc.Also have, Shuo Ming manufacture method is an example herein, can append other operation as required or remove the part of above-mentioned operation.
Also have, (2) hole injection/transport layer forms operation, (3) luminescent layer forms operation and undertaken by the drop ejection method (ink-jet method) that has adopted droplet ejection apparatus (ink discharge device).
(1) wall part forms operation
Next door portion forms in the operation, at the assigned position formation wall part 112 of substrate 2.The structure of the organic substance next door layer 112b that wall part 112 has the inorganic matter next door layer 112a that form as the 1st next door layer, form as the 2nd next door layer.
(1)-1 the formation of inorganic matter next door layer 112a
At first, as shown in Figure 8, the assigned position on substrate forms inorganic matter next door layer 112a.The position that inorganic matter next door layer 112a forms is on the 2nd interlayer dielectric 144b and pixel electrode 111.Also have, the 2nd interlayer dielectric 144b forms in the circuit element portion 14 that has disposed thin-film transistor, scan line, holding wire etc.Inorganic matter next door layer 112a for example can be by SiO 2, TiO 2Deng inorganic material constitute.These materials are by for example formation such as CVD method, coating, sputtering method, vapour deposition method.Also have, the thickness of preferred inorganic next door layer 112a is in the scope of 50nm～200nm, and especially preferred is 150nm.
By on interlayer insulating film 144 and pixel electrode 111 whole, forming the inorganic matter film, wait patterning inorganic matter film by photoetching process then, layer 112a forms the shape with peristome with the inorganic matter next door.Described peristome is adjacent to the formation position of the electrode surface 111a of pixel electrode 111, and is set to the 112c of lower openings portion as shown in Figure 8.Also have, inorganic matter next door layer 112a forms with the surrounding edge portion part of pixel electrode 111 overlapping, controls the flat luminous zone of luminescent layer 110 thus.
(1)-2 the formation of organic substance next door layer 112b
Then, formation is as the organic substance next door layer 112b of the 2nd next door layer.
Specifically, as shown in Figure 8, on the layer 112a of inorganic matter next door, form organic substance next door layer 112b.As the material that constitutes organic substance next door layer 112b, adopt the material with thermal endurance, solvent resistance of allyl resin, polyimide resin etc.Adopt these materials, form organic substance next door layer 112b by patternings such as photoetching techniques.Also have, during patterning, on the layer 112b of organic substance next door, form the upper opening 112d of portion.The 112b of upper opening portion is set at and electrode surface 111a and the 112c of lower openings portion adjoining position, makes it to form to have the common pattern of whole pixels.
Above-mentioned peristome 112d is preferably formed as shown in Figure 8 to also wideer than the 112c of lower openings portion that forms on the layer 112a of inorganic matter next door.Further, it is tapered that preferred organic substance next door layer 112b forms section shape, also preferably form in the bottom surface of organic substance next door layer 112b narrower than the width of pixel electrode 111, and form in the top of organic substance next door layer 112b with the width of pixel electrode 111 about equally.
Thus, the 1st laminated section 112e of the 112c of lower openings portion that surrounds inorganic matter next door layer 112a is become than organic substance next door layer 112b also to the outstanding shape of the center side of pixel electrode 111.Like this, be communicated with, form the peristome 112g that connects inorganic matter next door layer 112a and organic substance next door layer 112b by making at 112d of upper opening portion that forms on the layer 112b of organic substance next door and the 112c of lower openings portion that on the layer 112a of inorganic matter next door, forms.
Suitable surface treatment is preferably carried out by plasma treatment in the surface of wall part 112 that forms and pixel electrode 111, and specifically, counter septum portion carries out on 112 surfaces the lyophoby processing and pixel electrode 111 is carried out the lyophily processing.Surface treatment to pixel electrode 111 can be by using the O of oxygen 2Plasma treatment is carried out, for example can be by being that 100KW～800KW, oxygen flow are that 50ml/min～100ml/min, substrate transferring speed are that 0.5mm/sec～10mm/sec, substrate temperature are to handle under 70 ℃～90 ℃ the condition lyophilyization is implemented in the zone that comprises pixel electrode 111 surfaces in plasma power.In addition, can pass through this O 2Plasma treatment is carried out the adjustment of cleaning of pixel electrode 111 surfaces and work function simultaneously.Then, the surface treatment of counter septum portion 112 can be by using the CF of tetrafluoromethane 4Plasma treatment is carried out, can be by being that 100KW～800KW, tetrafluoride methane gas flow are that 50ml/min～100ml/min, substrate transferring speed are that 0.5mm/sec～10mm/sec, substrate temperature are to handle under 70 ℃～90 ℃ the condition for example in plasma power, the 112d of upper opening portion of counter septum portion 112 and above 112f implement lyophobyization.
(2) hole injection/transport layer forms operation
Then, form in the operation, at first on pixel electrode 111, form hole injection/transport layer at light-emitting component.
Form operation in hole injection/transport layer, by using for example ink discharge device as the drop liquid discharging device, the fluid composition that will comprise hole injection/transport layer formation material shoots out on electrode surface 111a.Then, carry out dried and heat treatment, forming hole injection/transport layer 110a on the pixel electrode 111 and on the inorganic matter cofferdam layer 112a.Also have,, the situation that does not form hole injection/transport layer 110a on the 1st laminated section 112e is also arranged here, promptly only on pixel electrode 111, form the situation of hole injection/transport layer.
The manufacture method of being undertaken by ink-jetting style is as follows.That is: as shown in Figure 9, a plurality of nozzles from be formed on ink gun H1 shoot out and comprise the fluid composition that hole injection/transport layer forms material.Here be by the scanning ink-jet head,, but can also be undertaken by scanning substrate 2 to each pixel filled compositions.In addition, can relatively move filled compositions by making ink gun and substrate 2.Below, the layer formation method (ink-jet method) of using ink gun to carry out, also same as described above.
As described below by shooing out of carrying out of ink gun.That is: the nozzle H2 that shoots out that will be formed on the ink gun H1 faces configuration mutually with electrode surface 111a, and shoots out fluid composition from nozzle H2.Around pixel electrode 111, be formed with the next door 112 of dividing the lower openings 112c of portion, make ink gun H1 in the face of being positioned at the pixel electrode face 111a of the 112c of this lower openings portion, limit relatively move this ink gun H1 and substrate 2, the limit from shoot out nozzle H2 electrode surface 111a shoot out average per 1 liquid measure Be Controlled the drop 110c of fluid composition.
As the fluid composition that in this operation, uses, can use and for example to gather the composition that ethylidene dioxy thiophene polythiofuran derivatives such as (PEDOT) and polystyrolsulfon acid mixtures such as (PSS) are dissolved in polar solvent.As polar solvent, can enumerate for example isopropyl alcohol (IPA), n-butanol, gamma-butyrolacton, N-methyl pyrrolidone (NMP), 1, glycol ethers such as 3-dimethyl-2-imidazolinedione (DMI) and derivative thereof, carbitol acetate ester, acetate of butyl carbitol.
As more detailed composition, what can exemplify is PEDOT/PSS mixture (PEDOT/PSS=1: be that 12.52 weight %, IPA are that 10 weight %, NMP are that 27.48 weight %, DMI are the composition of 50 weight % 20).The viscosity of last note fluid composition, preferably about 1mPas～20mPas, especially preferred is about 4mPas～15mPas.
Shoot out nozzle H2 and do not take place to stop up and stably shoot out by using the note fluid composition, can making.Also have, hole injection/transport layer forms material, can use identical materials to each luminescent layer 110b1～110b3 of red (R), green (G), blue (B), also can change according to each luminescent layer.
The drop 110c of the composition that shoots out spreads on electrode surface 111a that was handled by lyophily and the 1st laminated section 112e, and is filled in bottom, the 112c of upper opening portion, the 112d.If the 1st composition drop 110c is from the shooing out that the position flies out of regulation and above being shootd out on the 112f, then top 112f can be not wetting by the 1st composition drop 110c yet, and the 1st composition drop 110c that spills rolls in bottom, the 112c of upper opening portion, the 112d.
Hole injection/the transport layer of the thickness of the hole injection/transport layer that the amount of shooing out the composition on electrode surface 111a depends on the size of bottom, the 112c of upper opening portion, 112d, will form, fluid composition forms concentration of material etc.In addition, also can be more than once but be divided into and on identical electrode surface 111a, shoot out for several times with the drop 110c of fluid composition.In this case, the amount of each fluid composition can be identical, also can all change fluid composition at every turn.Have, be not limited to the same place of electrode surface 111a, also the different places in electrode surface 111a shoot out described fluid composition at every turn.
About the structure of ink gun, can use shower nozzle H as shown in figure 17.And then, about the configuration of substrate and ink gun, preferably configuration as shown in Figure 18.Among Figure 17, symbol H7 is the supporting substrate that supports described ink gun H1, is equipped with a plurality of ink gun H1 on this supporting substrate H7.Shoot out on the face (with the opposed face of substrate) at the Yin Mo of ink gun H1, be provided with a plurality of nozzles that shoot out, these shoot out nozzle arranges along the length direction of shower nozzle and is the row shape, and on the Width of shower nozzle devices spaced apart row be 2 row (for example, 180 nozzles of 1 row amount to 360 nozzles).In addition, overlook a plurality of this ink gun of positioning supports H1 on the rectangular supporting bracket 20, it shoots out nozzle towards substrate one side, and roughly X-direction is arranged as the row shape in the state lower edge of relative X-axis (or Y-axis) inclination predetermined angular, and on the Y direction, separate predetermined distance be arranged as 2 row (1 classifies 6 as among Figure 22, amounts to 12).
In addition, in Figure 18, symbol 1115 is loading stages of mounting substrate 2, and symbol 1116 is that loading stage 1115 is guided in the guide rail on the x direction of principal axis (main scanning direction) among the figure.In addition, shower nozzle H can be situated between and be moved by guide rail 1113 y direction of principal axis (sub scanning direction) in the drawings by support component 1111, and shower nozzle H can rotate by θ direction of principal axis in the drawings in addition, the angle that makes the relative main scanning direction of ink gun H1 tilt to stipulate.Like this, make it the relative scanning direction, can make injector spacing consistent with pel spacing by the configuration ink gun.In addition, by adjusting the angle of inclination, can also make injector spacing all consistent with any pel spacing.
Substrate 2 shown in Figure 18 is the structure of a plurality of chips of configuration on mother substrate.That is, the zone of 1 chip is equivalent to 1 display unit.Here, be formed with 3 viewing area 2a, but be not limited only to this.For example, to the viewing area 2a coating composition in the left side on the substrate 2 time, be situated between and by guide rail 1113 shower nozzle H left side in figure moved, and be situated between and by guide rail 1116 substrate 2 gone up side shifting in figure, scan edge substrate 2 limits apply.Then, shower nozzle H right side in figure is moved, to the viewing area 2a coating composition of the central authorities of substrate.To being positioned at the viewing area 2a of right-hand member, also carry out above-mentioned operation.Shower nozzle H as shown in figure 17 and ink discharge device as shown in figure 18 not only are used in hole injection/transport layer and form operation, and are used in luminescent layer formation operation.
Then, carry out as shown in figure 10 drying process.That is, the 1st composition after shooing out is carried out dried, make the solvent evaporation that is contained in the 1st composition, form hole injection/transport layer 110a.As carry out dried, the evaporation that then is contained in the solvent of fluid composition mainly occurs near inorganic matter next door layer 112a and the organic substance next door layer 112b, follows the evaporation hole injection/transport layer formation material of solvent to concentrate, separate out.Thus, as shown in figure 10, on the 1st laminated section 112e, form and form the 110a2 of surrounding edge portion that material constitutes by hole injection/transport layer.The 110a2 of this surrounding edge portion forms the wall (organic substance next door layer 112b) of being close to the 112d of upper opening portion, and its thickness is thin near electrode surface 111a one side, and away from electrode surface 111a side, promptly close organic substance next door layer 112b one side is thick.
In addition, meanwhile,, on electrode surface 111a, form thus and form the par 110a1 that material constitutes by hole injection/transport layer because dried also produces solvent evaporation on electrode surface 111a.Because the evaporation rate homogeneous roughly of solvent so the formation material of hole injection/transport layer is concentrated on the electrode 111a equably, forms the par 110a1 of uniform thickness thus on electrode surface 111a.Like this, form the hole injection/transport layer 110a that constitutes by 110a2 of surrounding edge portion and par 110a1.In addition, also can be not around edge part 110a go up and only on electrode surface 111a, form the mode of hole injection/transport layer.
Above-mentioned dried is for example in nitrogen environment, carry out about room temperature, pressure are for for example 133.3Pa (1Torr).The drop 110c of composition will produce bumping during hypotony, so not preferred.Also have, be made as more than the room temperature as temperature, then the evaporation rate of polar solvent speeds, and causes forming smooth film.After dried, preferred in a vacuum by in the heat treatment of heating under 200 ℃ about 10 minutes in nitrogen, remove polar solvent or water remaining in the injection/transport layer 110a of hole.
(3) luminescent layer forms operation
Luminescent layer forms operation and comprises that luminescent layer forms material ejection operation and drying process.
Same with above-mentioned hole injection/transport layer formation operation, on the injection/transport layer 110a1 of hole, spray the liquid composition that luminescent layer forms usefulness by ink-jet method., the liquid composition that shoot out carried out dried (and heat treatment), on the injection/transport layer 110a of hole, form luminescent layer 110b thereafter.
Figure 11 represents that comprising luminescent layer by shooing out of carrying out of ink-jet method forms operation with the fluid composition of material.As shown in the figure, relatively move ink gun H5 and substrate 2, the nozzle H6 that shoots out from be formed on ink gun shoots out the fluid composition that contains (for example being blue (B) here) of all kinds luminescent layer formation material.
When shooing out, with nozzle face to being positioned at the hole injection/transport layer 110a of bottom, the 112c of upper opening portion, 112d, limit relatively move ink gun H5 and substrate 2, the limit shoots out fluid composition.Be carried out control from shooing out average per 1 liquid measure that nozzle H6 shoots out.Like this, from shooing out the nozzle drop of liquid measure that shootd out Be Controlled, and this drop is shootd out on hole injection/transmission 110a.
In the present embodiment, as shown in Figure 2, in the 1st viewing area 21 and the 2nd viewing area 22 because the pattern difference of point of all kinds, so on each zone ejection mode difference.
In the 1st viewing area 21, as shown in figure 12, the fluid composition drop 110e that is dropped on the substrate 2 is not carried out drying, and the luminescent layer that contains different colours forms the configuration of shooing out of the fluid composition drop 110f of material and 110g.On the other hand, on the 2nd viewing area 22, shoot out configuration and contain the fluid composition 110g that red light emitting layer forms material.That is, in the present embodiment,, can optionally carry out shooing out of specified color to the point of regulation owing to shoot out operation by ink-jet method.
Shoot out each the fluid composition 110e～110g that, as shown in figure 12, diffusion on hole injection/transport layer 110, and be filled in bottom, the 112c of upper opening portion, the 112d.Like this, carried out lyophoby handle above on the 112f, even each fluid composition drop 110e～110g deviates from and shoots out in the above on the 112f from the position that shoots out of regulation, top 112f can be not wetting by fluid composition drop 110e～110g yet, and fluid composition drop 110e～110g will roll in bottom, the 112c of upper opening portion, the 112d.
In addition, 22 boundary portion disposes dummy pixel in the 1st viewing area 21 and the 2nd viewing area.Although dummy pixel has the peristome 112g that is surrounded by wall part 112, described dummy pixel is not shootd out drop, thereby do not form luminescent layer.
As mentioned above, ejection comprises liquid composition that redness, green, blue luminescent layer of all kinds form material on the other hand in the 1st viewing area 21, and ejection comprises the liquid composition that red luminescent layer forms material in the 2nd viewing area 22.In this case, if when forming the 1st viewing area 21 and the 2nd viewing area 22 continuously, on both borders colour mixture may take place, but by form dummy pixel as present embodiment, can prevent until suppressing because the bad generation of demonstration that described colour mixture is brought.In addition, preferably on described pseudo-zone, light shielding part is set with overlapping in the plane with it.
Form material as the luminescent layer that uses in the present embodiment, except that poly-fluorenes family macromolecule derivative, can use (gathering) to phenylene vinylidene derivative, polyphenylene derivative, polyvinylcarbazole, polythiofuran derivative, perillene class pigment, Coumarins pigment, rhodamine class pigment or in above-mentioned macromolecule, add organic EL Material.For example, can wait and use by interpolation rubrene, perillene, 9,10-diphenylanthrancene, tetraphenylbutadiene, Nile red, coumarin 6, quinoline bifurcation ketone.Also having, be used to dissolve so that disperse the solvent of these luminous formation materials, is same kind to what use on each luminescent layer.
Then, carry out dried.On the 1st viewing area 21, after configuration on the assigned position finishes the fluid composition 110e～110g of above-mentioned usefulness of all kinds, form luminescent layer 110b1～110b3 by dried in the lump.That is, solvent evaporation among fluid composition drop 110e～110g be will be contained in, as shown in figure 13 redness (R) luminescent layer 110b1, green (G) luminescent layer 110b2, blueness (B) luminescent layer 110b3 formed by drying.In addition, in Figure 13, though illustrate each one of the luminescent layer that sends redness, green, blue light, from Fig. 2 or other figure obviously as seen, light-emitting component forms rectangular originally, therefore is formed with not shown a plurality of luminescent layers by each color.
On the other hand, on the 2nd viewing area, configuration finishes behind the fluid composition 110g of red usefulness, forms luminescent layer 110b1 by dried in the lump.That is, make the solvent evaporation that is contained among the fluid composition drop 110g, form redness (R) luminescent layer 110b1 as shown in figure 14 by drying.
The drying of aforesaid fluid composition is preferably undertaken by vacuumize, lifts a concrete example, can be in the environment of nitrogen, at room temperature, pressure is to carry out under the condition about 133.2Pa (1Torr).If so hypotony then can make the fluid composition bumping is not preferred.Also have, as temperature is made as more than the room temperature, then the evaporation rate of solvent is accelerated, and luminescent layer forms that material to be attached on the 112d of the upper opening portion wall, so also not preferred.
Then, finished above-mentioned dried after, preferably use heaters such as heating plate to carry out annealing in process to luminescent layer 110b.This annealing in process is carried out under the common temperature and time of the characteristics of luminescence that can draw each organic EL layer to greatest extent.
Like this, on pixel electrode 111, form hole injection/transport layer 110a and luminescent layer 110b.
(4) cathode layer forms operation
Then, as Figure 15 and shown in Figure 16, in the 1st viewing area 21 and the 2nd viewing area 22, form cathode layer 12 respectively with pixel electrode (anode layer) 111 pairings.That is, on the zone on the substrate 2 that comprises luminescent layer 110b of all kinds and organic substance next door layer 112b all, form the cathode layer 12 of the formation that for example stacks gradually calcium layer and aluminium lamination.Thus, in the formation of luminescent layer 110b of all kinds zone all stacked cathode layer 12, form respectively and red, green, blue of all kinds corresponding organic EL.
Cathode layer 12 preferences are as being formed by vapour deposition method, sputtering method, CVD method etc., particularly for preventing preferably to use vapour deposition method to form owing to heat causes luminescent layer 110b damage this point.In addition, also can on cathode layer 12, be provided for the SiO of anti-oxidation 2, SiN etc. protective layer.
(5) sealing process
At last, will form the substrate 2 of organic EL by sealing resin and the hermetic sealing substrate prepared in addition seals.For example, will apply surrounding edge portion by the Mi envelope Shu Zhi Tu that thermosetting resin or ultraviolet hardening resin constitute, and on sealing resin, dispose hermetic sealing substrate at substrate 2.Sealing process preferably carries out under inert gas environments such as nitrogen, argon gas, helium.Under in atmospheric environment, carry out, then when generation has the situation of defectives such as hole on cathode layer 12, will have water or oxygen etc. and infiltrate cathode layer 12 and cause cathode layer 12 oxidations from this defect part, therefore not preferred.
Thereafter, by the wiring of cathode layer 12 with substrate 2 is connected, and with circuit element portion 14 be arranged on substrate 2 on or outside drive IC (drive circuit) be connected, finish the organic El device of present embodiment.
(e-machine)
Then, describe for the e-machine that has adopted display unit of the present invention.
At first, to describing with the execution mode that the display unit of the identical formation of organic El device of above-mentioned form of implementation is used for the display part of panel board.Figure 19 schematically shows the plane graph that the display part that is assemblied on the panel board is used the formation of substrate, and Figure 20 schematically shows the profile of same display part with the formation of substrate.
Described display part is based on the demonstration main part 31 of the formation of seizing organic EL layer between substrate 2 with TFT etc. and seal glass 3 on both sides by the arms and constitute, and is equipped with display surface 32 at the central portion of this demonstration main part 31.Also have, have the flexible base, board 4 that is connected with substrate 2 and be connected with above-mentioned demonstration main part 31, be equipped with external connection terminals 6 in the end of this external connecting 33 with the external connecting 33 that the data wire that sets on this flexible base, board 4 drives 1C5.
In addition, on substrate 2, constitute transistor array, have data holding circuit, and be built-in with scanner driver.Also have, be formed with data wire, control line, power line etc. on flexible base, board 4, data wire drives IC possesses provides function from data to each point (sub-pixel).Also have, external connection terminals 6 is to be used to receive from the control signal of not shown external control substrate with from the terminal of the power supply of power supply board.
On the other hand, Figure 21 is to the display part that carries, and represents the key diagram of the formation of its viewing area.In organic El device shown in Figure 2, by constituting colored 2 the different viewing areas of scope that show, but the viewing area 2a of this display part constitutes by can only carrying out the red monochromatic red display zone 22a that shows, can only carry out the blue viewing area 22b that blue monochromatic shows and can carry out the full color viewing area 21 that full color shows.Here, on each regional borderline region, constitute dummy pixel area 23, formed the zone of not carrying out any demonstration, promptly do not have the pixel region of luminescent layer.Borderline region also can be to form luminescent layer, but is controlled and the electric current of not flowing through by control circuit.
In addition, in described dummy pixel area 23, be formed with 3 pixels (i.e. 9 points (sub-pixel)) on its Width.Also have, the viewing area 2a of described display part comprises 560 * 560 pixels on the whole, and a pixel comprises 3 points (sub-pixel), also is formed with dummy pixel area 23 at the periphery of this viewing area 2a.
The display part of Gou Chenging is installed and used in panel board portion 500 as shown in figure 22 as mentioned above.Specifically, install in the mode of 4 groups of flexible base, boards being gone into panel board portion 500 inside.Red display zone 22a, be provided as and carry out instrument display part 71 uses that speed shows, and bright all the time lamp shows when automobile uses, on the other hand, blue viewing area 22b, be provided as the information display section 72 of needing that display line reaches information needed and use, and the bright lamp of sequential of the described information of corresponding output shows.And full color viewing area 21 is provided as full color and shows from the navigation information of navigation system or from the additional any information display section 74 of information that needs of the external information of vehicle-mounted vidicon etc. and use.
Secondly, the form of implementation that will be used for the display part of household appliances with the display unit that the organic El device of above-mentioned form of implementation has an identical formation is described.Figure 23 is the plane graph that schematically shows the formation that is installed on the display floater on the refrigerator.Figure 24 is the plane graph of its occupation mode of expression.In addition, because the device that uses on substrate formation etc. and the above-mentioned panel board is identical, the Therefore, omited explanation.
The viewing area 2a that is used for the display floater of present embodiment is by carrying out full color viewing area 21 that full color shows, can only carrying out the orange monochromatic orange viewing area 22c that shows and can only carry out the red monochromatic red display zone 22d that shows constituting.In addition, orange viewing area 22c is to be made of the pixel that 2 red points (sub-pixel) and 1 green point (sub-pixel) constitute.Also have, the 2a periphery is formed with dummy pixel area 23 in the viewing area.
The display floater of Gou Chenging as shown in figure 24, supplies to install and use the display part 550 in refrigerator as mentioned above.Specifically, red display zone 22d, the operation conditions display part 77 that is provided as the interior temperature of display refrigerator and other operation conditionss uses, and orange viewing area 22c is provided as information on services display part 76 uses that show information on services, in the present embodiment for showing the mode of the recipe that upgrade every day.Also have, full color viewing area 21 is provided as the image displaying part 75 that shows the image information that is additional to above-mentioned information on services and uses.
E-machine as described above, except that having increased the variation that shows, owing to be equipped with relevant display unit of the present invention, so can provide high-quality demonstration with the high life.
(the 2nd execution mode)
(organic El device)
Fig. 1 is that key diagram, Fig. 2 of Wiring structure of the organic El device of expression present embodiment is that floor map, Fig. 3 and Fig. 4 of the organic El device of expression present embodiment is the floor map of amplifying the formation of remarked pixel.Figure 25 and Figure 26 are the generalized sections of viewing area of the organic El device of expression present embodiment.
For Wiring structure, the formation of pixel, the viewing area of the organic El device of in these figure, representing, since similar with the 1st execution mode, so, omit explanation for giving identical symbol with the same formation of the 1st execution mode.
Stacked lithium fluoride layer 12a, calcium layer 12b and aluminium lamination 12c constitute the cathode layer 212 of present embodiment on described the 1st viewing area 221.At this moment, preferably the cathode layer of close luminescent layer one side is set to the low layer of work function.In this mode, the luminescent layer 110b of cathode layer and organic EL layer 110 directly contacts especially, plays the effect of injecting electronics to luminescent layer 110b.
The aluminium lamination 12c that forms cathode layer 212 makes the light that sends from the luminescent layer 110b layer to the emission of substrate 2 one sides, except aluminium, and the formations such as stacked film of preferred silver, aluminium and silver.Further also can on aluminium lamination 12c, be provided with by SiO, SiO 2, formation such as SiN the protective layer used of anti-oxidation.Also have, in the 1st viewing area 221, the bed thickness that constitutes each layer of cathode layer 212 is that lithium fluoride layer 12a is about that 5nm, calcium layer 12b are about 5nm, aluminium lamination 12c is about 200nm.
Figure 26 is the section pie graph of the 2nd viewing area 222, and only point (sub-pixel) A1 by redness constitutes.The 2nd viewing area 222 and the 1st viewing area 221 shown in Figure 25 are different on the formation of the formation of luminescent layer 110b and cathode layer 212.Other that constitutes except the section of luminescent layer 110b and cathode layer 212 in the 2nd viewing area 222 constitutes because identical with the 1st viewing area 221, so the omission explanation.
In the 2nd viewing area 222,3 red some A1 constitute 1 pixel, and the red light emitting layer 110b1 of redness (R) light is sent in configuration in each point A1.In addition, in the 1st viewing area 221, be formed for improving the lithium fluoride layer 12a of luminous efficiency as shown in figure 25 in the luminescent layer 110b of cathode layer 212 side, but in described the 2nd viewing area 222, do not form lithium fluoride layer 12a.This is because lithium fluoride layer 12a is the functional layer that is provided with as making the luminous efficiency of sending the blue light-emitting layer 110b3 of blueness (B) light among the luminescent layer 110b rise to purpose.Also have, constitute the thickness of each layer of the cathode layer 212 in the 2nd viewing area 222, calcium layer 12b is about 5nm, aluminium lamination 12c is about 200nm.
Organic El device and the 1st execution mode according to the 2nd execution mode with above such formation are same, and as shown in figure 27, the life-span obtains prolonging.Figure 27 shows that for the brightness (embodiment 2) in the 2nd viewing area 222 of the organic El device of present embodiment with full color the pixel of usefulness constitutes the brightness (comparative example) under all situations of viewing area, has represented its time history plot.Also have, ordinate is represented the surface brightness (cd/m of average 1 pixel 2), the abscissa express time (hour).
As shown in figure 27, according to the organic El device in the present embodiment,, access initial value 300cd/m pixel being set at 1 pixel energy about the organic El device of embodiment 2 and comparative example 2The occasion of surface brightness under, make brightness become time of 80% of initial value, be 8000 hours in comparative example relatively, be 40000 hours in embodiment 2.That is, owing to introduce the formation of present embodiment, the deterioration time of brightness has become about 5 times.
In addition, the organic El device of present embodiment has also improved resolution.That is, compare in the situation of whole viewing area 202a with the pixel arrangement that full color is shown usefulness, can be increased in the regulation zone (the 2nd viewing area 222) needs the pixel number of color amount, thereby can improve resolution.
In the organic El device of the 2nd execution mode, in the 1st viewing area 221 and the 2nd viewing area 222 that constitutes in that viewing area 2a is cut apart, make the lit-par-lit structure of the functional layer that constitutes pixel inequality respectively.Specifically, on the 2nd viewing area 222, do not comprise lithium fluoride 12a, improve in each regional luminous efficiency by making being formed in of cathode layer 12 comprise lithium fluoride layer 12a on the 1st viewing area.To in the 2nd viewing area 222, comprising the situation of lithium fluoride layer 12a and situation about not comprising, measured brightness respectively over time here.The result is illustrated in Figure 28.In Figure 28, the brightness that C1 represents not comprise under the situation of lithium fluoride layer 12a changes in time, and the brightness that C2 represents to comprise under the situation of lithium fluoride 12a changes in time.As seen from Figure 28, by not comprising lithium fluoride layer 12a, prolong the brightness life-span significantly in the 2nd viewing area 222.
Also have, also be to constitute the 1st viewing area 221 in the present embodiment for the full color demonstration is used, the 2nd viewing area 222 is the monochromatic usefulness that shows, but also can be the same with the 1st execution mode, for example constitute the 1st viewing area 221 and show that for full color with, the 2nd viewing area 222 be that two looks show usefulness, or to constitute the 1st viewing area 221 be that two looks show with, the 2nd viewing area 222 and are the monochromatic usefulness that shows.In addition, also can show and use the use white luminescent material, make the light of its look that turns white in monochrome.Thus, can constitute have a lot of variation patterns the viewing area in 202a.
(manufacture method of organic El device)
Then, describe with reference to accompanying drawing, omit explanation for the part identical with the 1st execution mode for the method for making the above-mentioned organic El device in the 2nd execution mode.
(4) cathode layer forms operation
Forming operation for the cathode layer different with the 1st execution mode describes.As Figure 29 and shown in Figure 30, on the 1st viewing area 221 and the 2nd viewing area 222, form respectively and cathode layer 212 that pixel electrode (anode layer) 111 matches.
That is, on the 1st viewing area 221, as shown in figure 29, on regional whole on the substrate 2 that comprises luminescent layer 110b of all kinds and organic substance cofferdam layer 112b, at first form lithium fluoride layer 12a after, form calcium layer 12b and aluminium lamination 12c in turn.In addition,, preferably use vapour deposition method, sputtering method, CVD method to wait and form, particularly for preventing preferably to use vapour deposition method to form owing to heat causes luminescent layer 110b damage this point by each layer that these metal materials form.
On the other hand, on the 2nd viewing area 222, as shown in figure 30, on regional whole on the substrate 2 that comprises luminescent layer 110b and organic substance next door layer 112b, at first form calcium layer 12b after, form aluminium lamination 12c.In this case, each layer also is preferably to use vapour deposition method, sputtering method, CVD method to wait and form, because heat causes this point of luminescent layer 110b damage, especially preferably uses vapour deposition method to form for preventing.
Thus, in the formation zone of the luminescent layer 110b of the 1st viewing area 221 and the 2nd viewing area 222 all on, form respectively cathode layer 212 stacked, with red, green, blue of all kinds corresponding organic EL.Also have, also can on cathode layer 212, be provided for the SiO of anti-oxidation 2, SiN etc. protective layer.
(5) sealing process
At last, will form the substrate 2 of organic EL by sealing resin and the hermetic sealing substrate prepared in addition seals.For example, will apply surrounding edge portion by the Mi envelope Shu Zhi Tu that thermosetting resin or ultraviolet hardening resin constitute, and on sealing resin, dispose hermetic sealing substrate at substrate 2.Sealing process preferably carries out under inert gas environments such as nitrogen, argon gas, helium.Under in atmospheric environment, carry out, then when generation has the situation of defectives such as hole on cathode layer 212, will have water or oxygen etc. and infiltrate cathode layer 212 and cause cathode layer 212 oxidations from this defect part, therefore not preferred.After this, by the wiring of cathode layer 212 with substrate 2 is connected, and with circuit element portion 14 be arranged on substrate 2 on or outside drive IC (drive circuit) be connected, finish the organic El device of present embodiment.
(e-machine)
Then, describe, give prosign, omit explanation for the part identical with the 1st execution mode for the e-machine of the display unit that has adopted present embodiment.
The display part of present embodiment is the same with the 1st execution mode, installs and uses in panel board portion 500 as shown in figure 22.Specifically, install in the mode of 4 groups of flexible base, boards being gone into panel board portion 500 inside.Red display zone 222a, be provided as and carry out instrument display part 71 uses that speed shows, and bright all the time lamp shows when automobile uses, on the other hand, blue viewing area 222b, be provided as the information display section 72 of needing that display line reaches information needed and use, and the bright lamp of sequential of the described information of corresponding output shows.And full color viewing area 221 is provided as full color and shows from the navigation information of navigation system or from the additional any information display section 74 of information that needs of the external information of vehicle-mounted vidicon etc. and use.
Secondly, the form of implementation that the display unit that will have identical formation with the organic El device of the 2nd form of implementation is used for the display part of household appliances describes.Figure 23 is the plane graph that schematically shows the formation that is installed on the display floater on the refrigerator.Figure 24 is the plane graph of its occupation mode of expression.In addition, because the device that uses on substrate formation etc. and the above-mentioned panel board is identical, the Therefore, omited explanation.
The viewing area 202a and the 1st execution mode of display floater that is used for present embodiment is same, is by carrying out full color viewing area 221 that full color shows, can only carrying out the orange monochromatic orange viewing area 222c that shows and can only carry out the red monochromatic red display zone 222d that shows constituting.In addition, orange viewing area 222c is to be made of the pixel that 2 red points (sub-pixel) and 1 green point (sub-pixel) constitute.Also have, the 202a periphery is formed with dummy pixel area 23 in the viewing area.
The display floater of Gou Chenging as shown in figure 24, supplies to install and use the display part 550 in refrigerator as mentioned above.Specifically, red display zone 222d, the operation conditions display part 77 that is provided as the interior temperature of display refrigerator and other operation conditionss uses, and orange viewing area 22c is provided as information on services display part 76 uses that show information on services, in the present embodiment for showing the mode of the recipe that upgrade every day.Also have, full color viewing area 221 is provided as the image displaying part 75 that shows the image information that is additional to above-mentioned information on services and uses.
E-machine as described above, except that having increased the variation that shows, owing to be equipped with relevant display unit of the present invention, so can provide high-quality demonstration with the high life.
More than, preferred embodiment of the present invention has been described, but the present invention is defined in these embodiment.As long as be no more than the scope of aim of the present invention, the interpolation that can constitute, omission, displacement and other change.The present invention is limited by aforesaid explanation, and is only limited by the scope of additional claim.

Claims (20)

1, a kind of display unit is characterized in that, possesses the viewing area, and described viewing area possesses:
The 1st viewing area that constitutes by the 1st pixel group that shows the 1st emission wavelength scope; With
The 2nd viewing area that constitutes by the 2nd pixel group that shows the 2nd emission wavelength scope different with described the 1st emission wavelength scope.
2, display unit according to claim 1 is characterized in that,
Described the 1st pixel group is made of the pixel that can show multiple color of light, and described the 2nd pixel group is made of the pixel that can show a kind of color of light.
3, display unit according to claim 1 is characterized in that,
Described the 1st pixel group is made of the pixel of the 2nd sub-pixel that comprises the color of light that the 1st sub-pixel that can send specified color light is different with sending the color of light sent with described the 1st sub-pixel,
Described the 2nd pixel group is made of the pixel that comprises 1 sub pixel that can send specified color light.
4, display unit according to claim 1 is characterized in that,
Described the 1st pixel group is made of the pixel that can carry out the full color demonstration, and described the 2nd pixel group constitutes by carrying out the monochromatic pixel that shows.
5, display unit according to claim 1 is characterized in that,
Described the 1st pixel group is by comprising that sub-pixel, sub-pixel that can send green light that can send red light and the pixel that can send the sub-pixel of blue light constitute,
Described the 2nd pixel group by comprise from sub-pixel, the sub-pixel that can send green light that can send red light, can send blue light sub-pixel among the pixel of the sub-pixel below 2 kinds selected constitute.
6, display unit according to claim 3 is characterized in that,
Described sub-pixel constitutes with identical size respectively.
7, display unit according to claim 3 is characterized in that,
Described sub-pixel constitutes with rectangular shape, and described on the other hand pixel constitutes with the square shape of the sub-pixel that comprises a plurality of described rectangular shape.
8, display unit according to claim 5 is characterized in that,
Described sub-pixel constitutes with identical size respectively.
9, display unit according to claim 5 is characterized in that,
Described sub-pixel constitutes with rectangular shape, and described on the other hand pixel constitutes with the square shape of the sub-pixel that comprises a plurality of described rectangular shape.
10, a kind of e-machine is characterized in that, possesses the described display unit of claim 1.
11, a kind of display unit is characterized in that, possesses the viewing area, and described viewing area possesses:
The 1st viewing area is made of the 1st pixel group that shows the 1st emission wavelength scope, possesses the 1st pixel that a plurality of duplexers that are made of a plurality of functional layers constitute; With
The 2nd viewing area is made of the 2nd pixel group that shows the 2nd emission wavelength scope different with described the 1st emission wavelength scope, possesses the 2nd pixel that the different duplexer that is made of a plurality of functional layers of a plurality of and described the 1st pixel lit-par-lit structure constitutes.
12, display unit according to claim 11 is characterized in that,
Described the 1st pixel group by the 1st pixel that can show multiple color of light constitute, described the 2nd pixel group is made of the 2nd pixel that can show a kind of color of light.
13, display unit according to claim 11 is characterized in that,
Described the 1st pixel group is made of the 1st pixel, and the 1st pixel comprises the 2nd sub-pixel of the color of light that the 1st sub-pixel that can send specified color light is different with sending the color of light sent with described the 1st sub-pixel at least,
Described the 2nd pixel group is made of the 2nd pixel, and the 2nd pixel comprises 1 sub pixel that can send specified color light.
14, display unit according to claim 11 is characterized in that,
Described the 1st pixel group is made of the 1st pixel that can carry out the full color demonstration, and described the 2nd pixel group constitutes by carrying out monochromatic the 2nd pixel that shows.
15, display unit according to claim 11 is characterized in that,
Described the 1st pixel group is made of the 1st pixel, and the 1st pixel comprises sub-pixel, sub-pixel that can send green light that can send red light and the sub-pixel that can send blue light,
Described the 2nd pixel group is made of the 2nd pixel, and the 2nd pixel comprises from the sub-pixel that can send red light, can send the sub-pixel of green light and can send the sub-pixel of selecting among the sub-pixel of blue light below 2 kinds.
16, display unit according to claim 11 is characterized in that,
Described the 1st pixel group is made of the 1st pixel that comprises the sub-pixel that can send blue light,
Described the 2nd pixel group is by comprising the sub-pixel that can send red light and do not comprise that or not 2nd pixel of the sub-pixel that can send blue light constitutes,
As the functional layer of described the 1st pixel, possess cathode layer, anode layer that comprises lithium fluoride and the organic EL layer that between described cathode layer and described anode layer, forms,
As the functional layer of described the 2nd pixel, possess cathode layer, anode layer that does not comprise lithium fluoride and the organic EL layer that between described cathode layer and described anode layer, forms.
17, display unit according to claim 11 is characterized in that,
Described the 1st pixel group is made of the 1st pixel, and the 1st pixel comprises sub-pixel, sub-pixel that can send green light that can send red light and the sub-pixel that can send blue light,
Described the 2nd pixel group is made of the 2nd pixel that comprises the sub-pixel that can send red light,
As the functional layer of described the 1st pixel, possess cathode layer, anode layer that comprises lithium fluoride and the organic EL layer that between described cathode layer and described anode layer, forms,
As the functional layer of described the 2nd pixel, possess cathode layer, anode layer that does not comprise lithium fluoride and the organic EL layer that between described cathode layer and described anode layer, forms.
18, display unit according to claim 16 is characterized in that,
The cathode layer that constitutes the functional layer of described the 1st pixel has the compound structure of lithium fluoride, calcium and aluminium,
The cathode layer that constitutes the functional layer of described the 2nd pixel has the compound structure of calcium and aluminium.
19, display unit according to claim 17 is characterized in that,
The cathode layer that constitutes the functional layer of described the 1st pixel has the compound structure of lithium fluoride, calcium and aluminium,
The cathode layer that constitutes the functional layer of described the 2nd pixel has the compound structure of calcium and aluminium.
20, a kind of e-machine is characterized in that, possesses the described display unit of claim 11.
CN 200510084421 2004-07-23 2005-07-15 Display device and electronic apparatus Pending CN1725917A (en)

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Cited By (2)

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CN108269828A (en) * 2016-12-30 2018-07-10 乐金显示有限公司 Organic light-emitting display device and its manufacturing method
CN110678917A (en) * 2017-06-05 2020-01-10 索尼公司 Display device and electronic apparatus

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Publication number Priority date Publication date Assignee Title
WO2008032584A1 (en) * 2006-09-11 2008-03-20 Fuji Electric Holdings Co., Ltd. Organic el display
KR20200082018A (en) * 2018-12-28 2020-07-08 엘지디스플레이 주식회사 Organic LIGHT EMITTING display DEVICE AND METHOD OF FABRICATING THEREOF

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108269828A (en) * 2016-12-30 2018-07-10 乐金显示有限公司 Organic light-emitting display device and its manufacturing method
CN110678917A (en) * 2017-06-05 2020-01-10 索尼公司 Display device and electronic apparatus
US11222876B2 (en) 2017-06-05 2022-01-11 Sony Corporation Display device and electronic apparatus
US11996394B2 (en) 2017-06-05 2024-05-28 Sony Group Corporation Display device and electronic apparatus

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