CN104465706A - Organic light-emitting display device and manufacturing method thereof - Google Patents
Organic light-emitting display device and manufacturing method thereof Download PDFInfo
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- CN104465706A CN104465706A CN201410789536.6A CN201410789536A CN104465706A CN 104465706 A CN104465706 A CN 104465706A CN 201410789536 A CN201410789536 A CN 201410789536A CN 104465706 A CN104465706 A CN 104465706A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
- H10K59/173—Passive-matrix OLED displays comprising banks or shadow masks
Abstract
The invention discloses an organic light-emitting display device and a manufacturing method thereof. The organic light-emitting display device comprises a substrate and a pixel defining layer located on the substrate, wherein the pixel defining layer limits a plurality of pixel units which are formed and arranged together. Each pixel unit comprises a first sub-pixel, a second sub-pixel, at least two additional sub-pixels, a first organic light-emitting layer arranged in the first sub-pixel and used for emitting first primary color light, a second organic light-emitting layer arranged in the second sub-pixel and used for emitting second primary color light, and third organic light-emitting layers arranged in the at least two additional sub-pixels and used for emitting third primary color light with the brightest light-emitting property, wherein the third organic light-emitting layers arranged in the at least two additional sub-pixels are connected together. According to the organic light-emitting display device and the manufacturing method of the organic light-emitting display device, the image display gravity centers of the organic light-emitting display device can be balanced, the color mixing phenomenon of an organic light-emitting display panel can be avoided, and the yield of the organic light-emitting display device is increased.
Description
Technical field
The present invention relates to Display Technique field, be specifically related to a kind of organic light-emitting display device and preparation method thereof.
Background technology
Organic luminescent device (organic light-emitting diode, OLED) be a kind of semiconductor device that can convert electric energy to luminous energy, because it has frivolous, high-contrast, the fast advantage such as response and wide viewing angle, be widely used in the display floater of a new generation.And be divided into active matrix organic light-emitting device (active-matrix organic light emitting diode according to the different OLED of type of drive, and passive matrix organic luminescent device (passive-matrix organic light emitting diode, PMOLED) AMOLED).
AMOLED display device comprises the pixel cell of multiple matrix arrangement, described pixel cell comprises red sub-pixel R, blue subpixels B and green sub-pixels G, wherein, due to red sub-pixel R, the luminous organic material that blue subpixels B is corresponding with green sub-pixels G is different, therefore red sub-pixel R, the characteristics of luminescence of blue subpixels B and green sub-pixels G is also different, because the brightness of green sub-pixels G is the highest, therefore the stimulation of green sub-pixels G to human eye is the strongest, directly affects human eye to judge the locus of display floater in display unit, it is alternatively the unbalanced phenomenon of a kind of display center of gravity.
Fig. 1 a is the structure chart of pixel cell in organic light-emitting display device in prior art, see Fig. 1 a, due to the area equation of red sub-pixel R, blue subpixels B and green sub-pixels G in each pixel cell, when AMOLED there will be the unbalanced phenomenon of display center of gravity when showing image, in order to improve the unbalanced phenomenon of display center of gravity, in a pixel cell, arrange two green sub-pixels G in prior art realize (see Fig. 1 b), but, in the process manufacturing AMOLED, need to use high-precision alignment system and fine metal mask plate (Fine Metal Mask, FMM) to red sub-pixel R, blue subpixels B and green sub-pixels G carries out evaporation respectively, due to the restriction of FMM precision, easily offset in evaporate process, cause luminous organic material mutually stacked, thus cause AMOLED display floater colour mixture, thus reduce the yield of AMOLED display floater.
Summary of the invention
The object of this invention is to provide a kind of organic light-emitting display device and preparation method thereof, balanced to make organic light-emitting display device image show center of gravity, and the mixed color phenomenon of organic electroluminescence display panel can be avoided, thus improve the yield of organic light-emitting display device.
In first aspect, embodiments provide a kind of organic light-emitting display device, comprising:
Substrate;
Be positioned at the pixel defining layer on described substrate, described pixel defining layer limits the multiple pixel cells being formed and be arranged together, and described pixel cell comprises the first sub-pix, the second sub-pix and other at least two sub-pixs;
Be arranged at the first organic luminous layer in described first sub-pix, this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light;
Be arranged at the second organic luminous layer in described second sub-pix, this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light;
Be arranged at the 3rd organic luminous layer in other at least two sub-pixs, the 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence;
Wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs links together.
In second aspect, embodiments provide a kind of manufacture method of organic light-emitting display device, comprising:
Substrate forms pixel defining layer, adopts the mask plate of pixel defining layer described pixel definition pattern layers to be formed to the multiple pixel cells be arranged together, described pixel cell comprises the first sub-pix, the second sub-pix and other at least two sub-pixs;
Adopt the first mask plate evaporation first organic luminous layer in described first sub-pix, this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light;
Adopt the second mask plate evaporation second organic luminous layer in described second sub-pix, this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light;
Adopt the 3rd mask plate evaporation the 3rd organic luminous layer in described at least two sub-pixs, 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence, wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs is formed in same processing step;
The mask plate of described pixel defining layer is corresponding in order to the perforate forming the 3rd organic luminous layer with described 3rd mask plate in order at least two perforates forming at least two sub-pixs in addition.
Organic light-emitting display device that the embodiment of the present invention provides and preparation method thereof, the multiple pixel cells being formed and be arranged together are limited by pixel defining layer, each pixel cell comprises the first sub-pix, second sub-pix and in addition at least two sub-pixs, wherein, first organic luminous layer is set in the first sub-pix, second organic luminous layer is set in the second sub-pix, in other at least two sub-pixs, the 3rd organic luminous layer with the brightest characteristics of luminescence is set, wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs links together, thus it is balanced to make organic light-emitting display device image show center of gravity, and the mixed color phenomenon of organic electroluminescence display panel can be avoided, thus improve the yield of organic light-emitting display device.
Accompanying drawing explanation
Exemplary embodiment of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention, in accompanying drawing:
Fig. 1 a and Fig. 1 b is the plan structure figure of pixel cell in organic light-emitting display device in prior art;
Fig. 2 is the plan structure figure of a kind of organic light-emitting display device that one embodiment of the invention provides;
Fig. 3 a and Fig. 3 b is the sectional structure chart of a kind of organic light-emitting display device that one embodiment of the invention provides;
Fig. 4 is the schematic diagram of the mask plate forming pixel defining layer in one embodiment of the invention;
Fig. 5 a is the schematic diagram of the first mask plate forming red organic luminous layer in one embodiment of the invention;
Fig. 5 b is the schematic diagram of the second mask plate forming blue organic luminous layer in one embodiment of the invention;
Fig. 5 c is the schematic diagram of the 3rd mask plate forming one embodiment of the invention Green organic luminous layer;
Fig. 6 a and Fig. 6 b is the sectional structure chart of a kind of organic light-emitting display device that one embodiment of the invention provides;
Fig. 7 a and Fig. 7 b is a kind of plan structure figure of the pixel cell of the organic light-emitting display device that one embodiment of the invention provides;
Fig. 8 is the another kind of plan structure figure of the pixel cell of a kind of organic light-emitting display device that one embodiment of the invention provides;
Fig. 9 is the flow chart of the manufacture method of the organic light-emitting display device that another embodiment of the present invention provides.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content, and in accompanying drawing, same or similar label represents same or similar element or has element that is identical or similar functions.
The embodiment of the present invention provides a kind of organic light-emitting display device, is the plan structure figure of a kind of organic light-emitting display device that one embodiment of the invention provides see Fig. 2 and Fig. 3 a and Fig. 3 b, Fig. 2; Fig. 3 a and Fig. 3 b is the sectional structure chart of a kind of organic light-emitting display device that one embodiment of the invention provides.
Described organic light-emitting display device comprises substrate 11, the pixel defining layer 12 be positioned on substrate 11, pixel defining layer 12 limits the multiple pixel cells being formed and be arranged together, and pixel cell comprises the first sub-pix a, the second sub-pix b and other at least two sub-pixs.Be arranged at the first organic luminous layer in the first sub-pix a, the first organic luminous layer in the present embodiment in this first sub-pix a is red organic luminous layer 131, and this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light, be arranged at the second organic luminous layer in the second sub-pix b, the second organic luminous layer in the present embodiment in this second sub-pix b is blue organic luminous layer 132, and this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light, be arranged at least two sub-pixs in addition, be the 3rd sub-pix c and the 4th sub-pix d in the present embodiment, the 3rd organic luminous layer is had in 3rd sub-pix c and the 4th sub-pix d is arranged, described 3rd organic luminous layer is green organic luminous layer 133, 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence, wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs links together, as shown in Figure 3 b, green organic luminous layer 133 in 3rd sub-pix c and the 4th sub-pix d links together.
The material of substrate 11 can be glass or flexiplast, and the material of pixel defining layer 12 can be inorganic insulating material, as silica or silicon nitride are formed, or can be organic insulating material, as phenylpropyl alcohol cyclobutane or acrylic resin are formed.
In Fig. 2 and Fig. 3 a and Fig. 3 b, pixel cell comprises four sub-pixs, and described four sub-pixs are respectively the first sub-pix a, the second sub-pix b and have the 3rd sub-pix c and the 4th sub-pix d of the brightest characteristics of luminescence.It will be appreciated by those skilled in the art that, pixel cell described herein comprises four sub-pixs only for explaining the present invention, but not limitation of the invention, in actual applications, can multiple sub-pixs with the brightest characteristics of luminescence be set in pixel cell as required.
In Fig. 2 and Fig. 3 a and Fig. 3 b, first sub-pix a is set to red sub-pixel, second sub-pix b is set to blue subpixels, the 3rd sub-pix c and the 4th sub-pix d and is set to green sub-pixels, this is just to the concrete example that the first sub-pix a, the second sub-pix b, the 3rd sub-pix c and the 4th sub-pix d are arranged, in other examples, first sub-pix a also can be set and be set to blue subpixels, second sub-pix b is set to red sub-pixel, 3rd sub-pix c and the 4th sub-pix d is set to green sub-pixels, does not limit at this.In addition, for convenience of description, be just described with the facilities that the first sub-pix a is red sub-pixel, the second sub-pix b is blue subpixels, the 3rd sub-pix c and the 4th sub-pix d is green sub-pixels below.
Described organic light-emitting display device comprises multiple pixel cell, and each pixel cell comprises multiple sub-pix, and each sub-pix district has rectangular shape.As shown in Figure 2, red sub-pixel a is rectangular shape and has length W1 and width L1, blue subpixels b is rectangular shape and has length W2 and width L2, and the 3rd sub-pix c of green sub-pixels and the 4th sub-pix d is rectangular shape and has length W3 and width L3.Each sub-pix district comprises effective coverage E and inactive area, inactive area is should be the region outside the E of effective coverage mutually, particularly, effective coverage E is organic luminous layer setting area, inactive area is the pixel definition layer region around described effective coverage E, and red organic luminous layer, blue organic luminous layer and green organic luminous layer are all formed in the E of effective coverage.Described pixel cell uses evaporation masking process in processing procedure, namely evaporation mask plate is used to block respectively, form red sub-pixel a, blue subpixels b and green sub-pixels c and d, inactive area between the effective coverage E of red sub-pixel a and the effective coverage E of blue subpixels b is the first spacing A, the effective coverage E of green sub-pixels c and d respectively and the effective coverage E of red sub-pixel a, blue subpixels b effective coverage E between inactive area be the second spacing B, the value of the first spacing A and the second spacing B is determined by the precision of fine metal mask plate.The effective coverage E of red sub-pixel a, the length of the effective coverage E of blue subpixels b and the effective coverage E of green sub-pixels c and d is respectively w1, w2, w3, width is respectively l1, l2, l3, and by the first spacing A by spaced for the effective coverage E of red sub-pixel a and the effective coverage E of blue subpixels b, by the second spacing B by the effective coverage E of green sub-pixels c and d respectively with the effective coverage E of red sub-pixel a, the effective coverage E of blue subpixels b is spaced, described red organic luminous layer 131, blue organic luminous layer 132 and green organic luminous layer 133 are formed by fine metal mask plate vapor deposition luminous organic material.It should be noted that, green sub-pixels, namely the effective coverage of the 3rd sub-pix c and the 4th sub-pix d comprises two effective coverages, the length of these two effective coverages is respectively w3 and w4, width is respectively l3 and l4, and spaced by the 3rd spacing X between these two effective coverages, and the distance between the perforate of the mask plate that the size of the 3rd spacing X is used by pixel defining layer 12 determines, preferably, the 3rd spacing X is less than the first spacing A or the second spacing B.
In the present embodiment, first can form the red organic luminous layer 131 in red sub-pixel a and the blue organic luminous layer 132 in blue subpixels b, form green sub-pixels again, namely the green organic luminous layer 133 in the 3rd sub-pix c and the 4th sub-pix d, also first green sub-pixels can be formed, namely the green organic luminous layer 133 in the 3rd sub-pix c and the 4th sub-pix d, form the red organic luminous layer 131 in red sub-pixel a and the blue organic luminous layer 132 in blue subpixels b again, in this no limit.
Please then refer to Fig. 4, Fig. 5 a to Fig. 5 c, Fig. 4 is the schematic diagram of the mask plate forming pixel defining layer in one embodiment of the invention, Fig. 5 a is the schematic diagram of the first mask plate forming red organic luminous layer in one embodiment of the invention, Fig. 5 b is the schematic diagram of the second mask plate forming blue organic luminous layer in one embodiment of the invention, and Fig. 5 c is the schematic diagram of the 3rd mask plate forming one embodiment of the invention Green organic luminous layer.
As shown in Figure 4, the mask plate 41 of pixel defining layer is for the formation of the pixel defining layer 12 in the present embodiment.Pixel defining layer 12 limits the multiple pixel cells being formed and be arranged together, described pixel cell comprises red sub-pixel a, blue subpixels b and green sub-pixels c and d, wherein, the mask plate 41 of pixel defining layer has two perforates 403 and 404 for limiting green sub-pixels c and d region, the 3rd spacing X between the effective coverage of the corresponding 3rd sub-pix c of the distance V6 between perforate 403 and 404 and the effective coverage of the 4th sub-pix d.The mask plate 41 of pixel defining layer also comprise perforate 401 and perforate 402 for limit red sub-pixel district with blue subpixels district, the first distance A between the effective coverage of the corresponding red sub-pixel a of the distance V5 between perforate 401 and perforate 402 and the effective coverage of blue subpixels b.The perforate 403 and 404 of the mask plate 41 of pixel defining layer and perforate 401, second distance B between the effective coverage of corresponding green sub-pixels c and d of distance H3 between perforate 402 and the effective coverage of red sub-pixel a and the effective coverage of blue subpixels b, wherein, the value of the first distance A be the red organic luminous layer 131 of evaporation and blue organic luminous layer 131 time form the minimum value of inactive area, the value of second distance B be the green organic luminous layer 133 of evaporation and red organic luminous layer 131 and blue organic luminous layer 132 time form the minimum value of inactive area, thus the area of inactive area in pixel cell is diminished, the area of effective coverage becomes large, thus improve the aperture opening ratio of pixel cell, reduce the power consumption of display unit.
As shown in Figure 5 a, first mask plate 51 is for the formation of red organic luminous layer 131, aligned position for the formation of the first mask plate 51 of red organic luminous layer 131 is different from the aligned position for the formation of the second mask plate 52 of blue organic luminous layer 132 and the 3rd mask plate 53 of green organic luminous layer 133, in pixel cell, perforate 501 on first mask plate 51 corresponds to red organic luminous layer 131, the perforate 501 of described first mask plate 51 has the first perforate length N1, described first aperture widths is more than or equal to the length w1 of red organic luminous layer, the perforate 501 of described first mask plate 51 has the first aperture widths M1, described first perforate length is more than or equal to the width l1 of red organic luminous layer.
As shown in Figure 5 b, second mask plate 52 is for the formation of blue organic luminous layer 132, aligned position for the formation of the second mask plate 52 of blue organic luminous layer 132 is different from the aligned position for the formation of the first mask plate 51 of red organic luminous layer 131 and the 3rd mask plate 53 of green organic luminous layer 133, in pixel cell, perforate 502 on second mask plate 52 corresponds to blue organic luminous layer 132, the perforate 402 of described second mask plate 52 has the second perforate length N2, described second perforate length N2 is more than or equal to the length w2 of blue organic luminous layer 132, the perforate 502 of described second mask plate 52 has the second aperture widths M2, described second aperture widths M2 is more than or equal to the width l2 of red organic luminous layer.
As shown in Figure 5 c, 3rd mask plate 53 is for the formation of green organic luminous layer 133, aligned position for the formation of the 3rd mask plate 53 of green organic luminous layer 133 is different from the aligned position for the formation of the first mask plate 51 of red organic luminous layer 131 and the second mask plate 52 of blue organic luminous layer 132, in pixel cell, perforate 503 on 3rd mask plate 53 corresponds to green organic luminous layer 133, the perforate 503 of described 3rd mask plate 53 has the 3rd perforate length N3, described 3rd perforate length is more than or equal to the length w1+w2+X of green organic luminous layer 133, described 3rd aperture widths is more than or equal to the width l3 of green organic luminous layer 133.
In the present embodiment, first aspect, pixel cell is arranged together closely, and pixel rendering algorithm easily realizes, and pixel rendering algorithm and display effect have direct relation, therefore, compared to prior art, improves the unbalanced phenomenon of display center of gravity; Second aspect, connects together the green organic luminous layer in the 3rd sub-pix and the 4th sub-pix, from manufacture craft, reduces mask plate and makes difficulty, and can avoid organic electroluminescence display panel generation mixed color phenomenon in evaporate process; The third aspect, because the characteristics of luminescence of green luminous organic material is the strongest, the strongest to the stimulation of human eye, directly affects the locus of human eye to display image to judge, under identical technological limits condition and the pixel cell of equal area and number, the number in green sub-pixels district is set to two, the resolution of image display can be improved.
Refer to Fig. 6 a and Fig. 6 b, on the basis of structure shown in Fig. 3 a and Fig. 3 b, described organic light-emitting display device also can comprise the first anode 141 between pixel defining layer 12 in the first sub-pix a and substrate 11, pixel defining layer 12 in the second sub-pix b and the second plate 142 between substrate 11, pixel defining layer 12 in the 3rd sub-pix c and the third anode 143 between substrate 11, pixel defining layer 12 in the 4th sub-pix d and the 4th anode 144 between substrate 11, red organic luminous layer 131 is positioned on the first anode 141, blue organic luminous layer 132 is positioned on second plate 142, green organic luminous layer 133 lays respectively on third anode 143 and the 4th anode 144, the first anode 141, second plate 142, third anode 143 are connected with thin-film transistor (not shown in Fig. 3) respectively with the lower surface of the 4th anode 144, and described thin-film transistor can be driving transistors, and the semitransparent cathode 15 be arranged on red organic luminous layer 131, blue organic luminous layer 132 and green organic luminous layer 133.
Pixel cell is shown by the signal accepted from pixel-driving circuit, pixel-driving circuit optionally conducting or close described driving transistors, described driving transistors is sent to described anode the current potential preset, therefore, electrical potential difference is formed between described anode and semitransparent cathode 15, electronics and hole are injected into organic luminous layer by negative electrode 15 and described anode respectively, thus excite luminous organic material luminous.In the present embodiment, because the green organic luminous layer in the 3rd sub-pix c is connected with the third anode 143 being positioned at the 3rd sub-pix c, green organic luminous layer in 4th sub-pix d is connected with the 4th anode 144 being positioned at the 4th sub-pix d, therefore, two pixel-driving circuits are needed to drive the 3rd sub-pix c and the 4th sub-pix d respectively.
It should be noted that, schematically illustrate organic light-emitting display device in Fig. 3 a, Fig. 3 b and Fig. 6 a, Fig. 6 b and be positioned at membrane structure figure on substrate, because the structure of organic light-emitting display device can be multiple, therefore corresponding, the rete on the substrate of described organic light-emitting display device also can be various.Not to the concrete refinement of concrete rete on substrate in the present embodiment, as long as the 3rd organic luminous layer with the brightest characteristics of luminescence be arranged in other at least two sub-pixs links together.Therefore, not because of using Fig. 3 a, Fig. 3 b and Fig. 6 a, Fig. 6 b as the restriction to the present embodiment structure.
On the basis of above-mentioned organic light-emitting display device, in described organic light-emitting display device, the area of each sub-pix of pixel cell can be different, preferably, the area of blue subpixels 132 is greater than the area of red sub-pixel 131 and green sub-pixels 133, because the luminous efficiency of blue organic luminous material is lower, therefore, the low defect of blue organic luminous material luminous efficiency can be made up by the area increasing blue subpixels 132, thus improve the life-span of organic light-emitting display device.
On the basis of above-mentioned organic light-emitting display device, in described organic light-emitting display device, the area of each sub-pix of pixel cell and shape can be different, and Fig. 7 a and Fig. 7 b is a kind of plan structure figure of the pixel cell of the organic light-emitting display device that one embodiment of the invention provides.Refer to Fig. 7 a and Fig. 7 b, preferably, red sub-pixel a, blue subpixels b and green sub-pixels c and d are polygon, and red sub-pixel a, green sub-pixels b are identical with the shape of blue subpixels c with d.Preferred, the shape of red sub-pixel a, blue subpixels b and green sub-pixels c and d is that rectangle is (see any one a) or in hexagon (see Fig. 7 b) of Fig. 7, be arranged together closely between pixel cell, other pixel cell is uniform-distribution with around each pixel cell, by increasing the interior angle of each sub-pix, pixel cell is made to have larger aperture opening ratio.
Except the structure of the pixel cell shown in Fig. 7 a and 7b, Fig. 8 is the another kind of plan structure figure of the pixel cell of a kind of organic light-emitting display device that one embodiment of the invention provides.See Fig. 8, red sub-pixel a, blue subpixels b and green sub-pixels c and d is polygon, described red sub-pixel a, blue subpixels b also can not be identical with the shape of green sub-pixels c with d, preferably, red sub-pixel a, the interior angle of blue subpixels b and green sub-pixels c and d is more than or equal to 90 °, such as: the shape of red sub-pixel a is rectangle, the shape of blue subpixels b is the pentagon with three right angles and two obtuse angles, the shape of green sub-pixels c and d is the hexagon with four right angles and two obtuse angles, be arranged together closely between pixel cell, other pixel cell is uniform-distribution with around each pixel cell, by the interior angle of each sub-pix is set to be more than or equal to 90 °, the aperture opening ratio of pixel cell can be improved, thus improve the luminous efficiency of organic light-emitting display device, reduce the power consumption of organic light-emitting display device, in addition, the locus arrangement of pixel cell is simple, pixel rendering is respond well, pixel space symmetry is good, and relative cost is lower.
The organic light-emitting display device that the embodiment of the present invention provides, organic light-emitting display device image can be made to show center of gravity balanced, and the mixed color phenomenon of organic electroluminescence display panel can be avoided, thus improve the yield of organic light-emitting display device, in addition, by the area of blue subpixels is set to maximum, improve the life-span of organic light-emitting display device, by the interior angle of sub-pix is set to be more than or equal to 90 °, the aperture opening ratio of pixel cell can be improved, pixel space symmetry is good, and relative cost is lower.
Fig. 9 is the flow chart of the manufacture method of the organic light-emitting display device that another embodiment of the present invention provides, and in order to make the organic light-emitting display device described in above-described embodiment, see Fig. 9, the manufacture method of described organic light-emitting display device comprises:
Step 11, on substrate, form pixel defining layer, adopt the mask plate of pixel defining layer described pixel definition pattern layers to be formed to the multiple pixel cells be arranged together, described pixel cell comprises the first sub-pix, the second sub-pix and other at least two sub-pixs.
In this step, the material of substrate can be glass or flexiplast, and the material of pixel defining layer can be inorganic insulating material, as silica or silicon nitride are formed, or can be organic insulating material, as phenylpropyl alcohol cyclobutane or acrylic resin are formed.
Step 12, adopt the first mask plate evaporation first organic luminous layer in described first sub-pix, this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light.
In this step, the first sub-pix can be red sub-pixel, and corresponding first organic luminous layer is red organic luminous layer, certainly, first sub-pix also can be blue subpixels, and corresponding first organic luminous layer is blue organic luminous layer, does not limit at this.
Step 13, adopt the second mask plate evaporation second organic luminous layer in described second sub-pix, this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light.
In this step, the second sub-pix can be blue subpixels, and corresponding second organic luminous layer is blue organic luminous layer, certainly, second blue subpixels also can be red sub-pixel, and corresponding second organic luminous layer is red organic luminous layer, does not limit at this.
Step 14, employing the 3rd mask plate evaporation the 3rd organic luminous layer in described at least two sub-pixs, 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence, wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs is formed in same processing step.
Wherein, the mask plate of described pixel defining layer is corresponding in order to the perforate forming the 3rd organic luminous layer with described 3rd mask plate in order at least two perforates forming at least two sub-pixs in addition.
Preferably, described pixel cell comprises four sub-pixs, and described four sub-pixs are respectively the first sub-pix, the second sub-pix and have the 3rd sub-pix and the 4th sub-pix of the brightest characteristics of luminescence.In description below, with described first sub-pix for red sub-pixel, described second sub-pix is blue subpixels, and described 3rd sub-pix and described 4th sub-pix are green sub-pixels is that example is described.
See Fig. 4 and Fig. 5 c, mask plate 41 forms green sub-pixels c and d and has two perforates 403 and 404, distance V6 between perforate 403 and 404 is the distance X between the effective coverage of the 3rd sub-pix c and the effective coverage of the 4th sub-pix d, 3rd mask plate 53 is for the formation of green organic luminous layer 133, the shape of the perforate 503 of described 3rd mask plate 53 is strip, the perforate 503 of described 3rd mask plate 53 has the 3rd perforate length N3, described 3rd perforate length is more than or equal to the width w1+w2+X of green organic luminous layer 133, described 3rd aperture widths is more than or equal to the length l3 of green organic luminous layer 133.
Preferably, the minimum value of the inactive area that the distance between the perforate that pixel defining layer described in the mask plate patterning of pixel defining layer forms the first sub-pix, the second sub-pix and at least two sub-pixs is in addition formed when being evaporation first organic luminous layer, the second organic luminous layer and the 3rd organic luminous layer.
As shown in Figure 4, the mask plate 41 of pixel defining layer is for the formation of the pixel defining layer 12 in the present embodiment, pixel defining layer limits the multiple pixel cells being formed and be arranged together, described pixel cell comprises red sub-pixel a, blue subpixels b and green sub-pixels c and d, wherein, mask plate 41 forms green sub-pixels c and d and has two perforates 403 and 404, distance V6 between perforate 403 and 404 is the distance X between the effective coverage of the 3rd sub-pix c and the effective coverage of the 4th sub-pix d, and the distance V5 formed between the perforate 401 in red pixel district and the perforate 402 in blue pixel district is the distance A between the effective coverage of red sub-pixel a and the effective coverage of blue subpixels b, and the distance B formed between effective coverage that the perforate 403 and 404 of green pixel c and d and the distance H3 between the perforate 401 of red pixel a and the perforate 402 of blue pixel b are the effective coverage of green sub-pixels c and d and the effective coverage of red sub-pixel a and blue subpixels b, wherein, the value of A be the red organic luminous layer 131 of evaporation and blue organic luminous layer 131 time form the minimum value of inactive area, the value of B be the green organic luminous layer 133 of evaporation and red organic luminous layer 131 and blue organic luminous layer 132 time form the minimum value of inactive area, thus the area of inactive area in pixel cell is diminished, the area of effective coverage becomes large, thus improve the aperture opening ratio of pixel cell, reduce the power consumption of display unit.
Although because the green organic luminous layer in the 3rd sub-pix and the 4th sub-pix is formed in same technique, but due to the third anode in corresponding 3rd sub-pix of the green organic luminous layer in the 3rd sub-pix, the 4th anode in corresponding 4th sub-pix of green organic luminous layer in 4th sub-pix, therefore, the 3rd sub-pix and the 4th sub-pix are driven by two drive circuits respectively.
Preferably, the area of blue subpixels is greater than the area of red sub-pixel and green sub-pixels, because the luminous efficiency of blue organic luminous material is lower, therefore, the low defect of blue organic luminous material luminous efficiency can be made up by the area increasing blue subpixels, thus improve the life-span of organic light-emitting display device.
Preferably, the shape of red sub-pixel be rectangle, the shape of described blue subpixels be there is the pentagon at three right angles and two obtuse angles, the shape of described green sub-pixels is the hexagon (see Fig. 8) with four right angles and two obtuse angles.Be arranged together closely between pixel cell, other pixel cell is uniform-distribution with around each pixel cell, by being set to be more than or equal to 90 ° by the interior angle of each sub-pix, the aperture opening ratio of pixel cell can be improved, thus improve the luminous efficiency of organic light-emitting display device, reduce the power consumption of organic light-emitting display device, in addition, the locus arrangement of pixel cell is simple, and pixel rendering is respond well, pixel space symmetry is good, and relative cost is lower.
The manufacture method of the organic light-emitting display device that the embodiment of the present invention provides, organic light-emitting display device image can be made to show center of gravity balanced, and organic electroluminescence display panel generation mixed color phenomenon can be avoided, improve the yield of organic light-emitting display device, in addition, the aperture opening ratio of pixel cell can be ensured, improve the efficiency of organic light-emitting display device, the low defect of blue organic luminous material luminous efficiency can be made up by the area increasing blue subpixels, thus improve the life-span of organic light-emitting display device, by the interior angle of sub-pix is set to be more than or equal to 90 °, the aperture opening ratio of pixel cell can be improved, pixel space symmetry is good, and relative cost is lower.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (18)
1. an organic light-emitting display device, is characterized in that, comprising:
Substrate;
Be positioned at the pixel defining layer on described substrate, described pixel defining layer limits the multiple pixel cells being formed and be arranged together, and described pixel cell comprises the first sub-pix, the second sub-pix and other at least two sub-pixs;
Be arranged at the first organic luminous layer in described first sub-pix, this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light;
Be arranged at the second organic luminous layer in described second sub-pix, this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light;
Be arranged at the 3rd organic luminous layer in other at least two sub-pixs, the 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence;
Wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs links together.
2. according to claim 1 gained organic light-emitting display device, it is characterized in that, described pixel cell comprises four sub-pixs, and described four sub-pixs are respectively described first sub-pix, described second sub-pix and have the 3rd sub-pix and the 4th sub-pix of the brightest characteristics of luminescence.
3. organic light-emitting display device according to claim 2, is characterized in that, described first sub-pix is red sub-pixel, and described second sub-pix is blue subpixels, and described 3rd sub-pix and described 4th sub-pix are green sub-pixels.
4. organic light-emitting display device according to claim 3, is characterized in that, described 3rd sub-pix and described 4th sub-pix are driven by two drive circuits respectively.
5. organic light-emitting display device according to claim 3, is characterized in that, the area of described blue subpixels is greater than the area of described red sub-pixel or described green sub-pixels.
6., according to the arbitrary described organic light-emitting display device of claim 3-5, it is characterized in that, described red sub-pixel, blue subpixels and green sub-pixels are polygon, and described red sub-pixel, green sub-pixels are identical with the shape of blue subpixels.
7. organic light-emitting display device according to claim 6, is characterized in that, the shape of described red sub-pixel, blue subpixels and green sub-pixels is any one in rectangle or hexagon.
8., according to the arbitrary described organic light-emitting display device of claim 3-5, it is characterized in that, described red sub-pixel, blue subpixels and green sub-pixels are polygon, and described red sub-pixel, blue subpixels are not identical with the shape of green sub-pixels.
9. organic light-emitting display device according to claim 8, is characterized in that, the interior angle of described red sub-pixel, blue subpixels and green sub-pixels is more than or equal to 90 °.
10. organic light-emitting display device according to claim 8, it is characterized in that, the shape of described red sub-pixel is rectangle, the shape of described blue subpixels be there is the pentagon at three right angles and two obtuse angles, the shape of described green sub-pixels is the hexagon with four right angles and two obtuse angles.
The manufacture method of 11. 1 kinds of organic light-emitting display devices, is characterized in that, comprising:
Substrate forms pixel defining layer, adopts the mask plate of pixel defining layer described pixel definition pattern layers to be formed to the multiple pixel cells be arranged together, described pixel cell comprises the first sub-pix, the second sub-pix and other at least two sub-pixs;
Adopt the first mask plate evaporation first organic luminous layer in described first sub-pix, this first organic luminous layer comprises the first luminous organic material in order to send the first primitive color light;
Adopt the second mask plate evaporation second organic luminous layer in described second sub-pix, this second organic luminous layer comprises the second luminous organic material in order to send the second primitive color light;
Adopt the 3rd mask plate evaporation the 3rd organic luminous layer in described at least two sub-pixs, 3rd organic luminous layer comprises the 3rd luminous organic material in order to send the primaries with the brightest characteristics of luminescence, wherein, the 3rd organic luminous layer be arranged in other at least two sub-pixs is formed in same processing step;
The mask plate of described pixel defining layer is corresponding in order to the perforate forming the 3rd organic luminous layer with described 3rd mask plate in order at least two perforates forming at least two sub-pixs in addition.
The manufacture method of 12. organic light-emitting display devices according to claim 11, it is characterized in that, the minimum value of the inactive area formed when the distance between the perforate that pixel defining layer described in the mask plate patterning of described pixel defining layer forms the first sub-pix, the second sub-pix and other at least two sub-pixs is evaporation first organic luminous layer, the second organic luminous layer and the 3rd organic luminous layer.
The manufacture method of 13. organic light-emitting display devices according to claim 11, it is characterized in that, described pixel cell comprises four sub-pixs, and described four sub-pixs are respectively the first sub-pix, the second sub-pix and have the 3rd sub-pix and the 4th sub-pix of the brightest characteristics of luminescence.
The manufacture method of 14. organic light-emitting display devices according to claim 13, is characterized in that, described first sub-pix is red sub-pixel, and described second sub-pix is blue subpixels, and described 3rd sub-pix and described 4th sub-pix are green sub-pixels.
The manufacture method of 15. organic light-emitting display devices according to claim 14, is characterized in that, described 3rd sub-pix and described 4th sub-pix are driven by two drive circuits respectively.
The manufacture method of 16. organic light-emitting display devices according to claim 14, is characterized in that, the area of described blue subpixels is greater than the area of described red sub-pixel and described green sub-pixels.
The manufacture method of 17. organic light-emitting display devices according to claim 14, it is characterized in that, the shape of described red sub-pixel is rectangle, the shape of described blue subpixels be there is the pentagon at three right angles and two obtuse angles, the shape of described green sub-pixels is the hexagon with four right angles and two obtuse angles.
The manufacture method of 18. organic light-emitting display devices according to claim 17, is characterized in that, the shape of the perforate of described 3rd mask plate is strip.
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| CN201410789536.6A CN104465706A (en) | 2014-12-17 | 2014-12-17 | Organic light-emitting display device and manufacturing method thereof |
| CN201510084603.9A CN104659069B (en) | 2014-12-17 | 2015-02-16 | A kind of organic light-emitting display device and preparation method thereof |
| DE102015113348.2A DE102015113348B4 (en) | 2014-12-17 | 2015-08-13 | DISPLAY DEVICE WITH ORGANIC LIGHT DIODES AND METHOD FOR MANUFACTURING THEREOF |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104659069A (en) | 2015-05-27 |
| CN104659069B (en) | 2017-10-31 |
| DE102015113348B4 (en) | 2021-10-14 |
| DE102015113348A1 (en) | 2016-08-18 |
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