CN106910760A - Dot structure, OLED display of OLED display and preparation method thereof - Google Patents
Dot structure, OLED display of OLED display and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of dot structure of OLED display, OLED display and preparation method thereof.The preparation method includes step：The first coloured light layer is deposited with hole transmission layer using mask plate；By the way of common evaporation, blu-ray layer is deposited with the hole transport layer, the first coloured light layer constitutes luminescent layer with the blu-ray layer；Electron transfer layer and cathode layer are sequentially formed on the light-emitting layer；Light conversion layer is formed on the cathode layer, the coloured light of part first that first coloured light layer is emitted is switched into the second coloured light；First coloured light and second coloured light are selected from the one kind in green glow and feux rouges, and different.Dot structure, OLED display of above-mentioned OLED display and preparation method thereof, can realize reaching three-colour light-emitting using a mask plate, and can reduce the size of pixel, so as to improve the resolution ratio of OLED display.
Description
Technical field
The present invention relates to OLED display technical field, more particularly to a kind of pixel of OLED display
Structure, the preparation method with the OLED display of the dot structure and the OLED display.
Background technology
OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display uses RGB
Three sub-pixels show coloured image, because OLED display has excellent brightness and excitation, its
The scope of application is more and more extensive.
In the application, requirement more and more higher of the user to display resolution.Resolution ratio can use PPI (Pixels
Per Inch, the number of pixels that per inch is possessed) characterize, and PPI is related to pixel arrangement structure.For
Raising resolution ratio, need to reduce the size of pixel, thus it requires mask plate for being deposited with RGB light is opened
Mouth diminishes.But, by mask plate, preparation technology is influenceed, and the size of the opening of mask plate is restricted.
Usually, traditional OLED display include stack gradually substrate, anode layer, hole injection layer,
Hole transmission layer, luminescent layer, electron transfer layer and cathode layer, wherein, luminescent layer include feux rouges layer, it is green
Photosphere and blu-ray layer, feux rouges layer, green glow layer cross its corresponding mask plate with blu-ray layer in hole transport respectively
Layer evaporation is obtained, and the OLED displayer structure needs three sub-pixel mask plates of precision.
Further, as shown in figure 1, feux rouges layer passes through its corresponding mask plate in sky respectively with green glow layer
Evaporation is obtained in the transport layer of cave, and blu-ray layer is obtained by the way of evaporation altogether, the OLED displayer structure
Two sub-pixel mask plates of precision are needed, but is similarly limited to the size of the opening of mask plate, it is impossible to
To high-resolution OLED display.
The content of the invention
Based on this, it is necessary to for the problem of the resolution ratio for how improving OLED display, there is provided a kind of
The dot structure of OLED display, shown with the OLED display of the dot structure and the OLED
The preparation method of device.
A kind of dot structure of OLED display, including multirow pixel cell group, often go the pixel cell
Group includes being alternately repeated multiple pixel cells of arrangement successively, and the pixel cell includes the first sub-pixel, the
Two sub-pixels and the 3rd sub-pixel；Wherein, in the pixel cell second sub-pixel and described
Three sub-pixels are along the first sub-pixel in the pixel cell wherein while forming a line；
The pixel cell adjacent to any two in pixel cell group described in every row, one of pixel cell
Central plane rotation 180 degree according to one other pixel unit forms its first sub-pixel, described second
The arrangement mode of sub-pixel and the 3rd sub-pixel；
To two pixel cells in the pixel cell group of adjacent rows positioned at same row, one of picture
Plain unit forms its first sub-pixel, institute according to the central plane rotation 180 degree of one other pixel unit
State the arrangement mode of the second sub-pixel and the 3rd sub-pixel.
A kind of OLED display, the OLED display includes the dot structure of above-mentioned OLED display,
The OLED display includes hole transmission layer, and is sequentially formed in luminous on the hole transmission layer
Layer, electron transfer layer, cathode layer and light conversion layer, wherein, the luminescent layer include the first coloured light layer with
And blu-ray layer, the first coloured light layer is located on the hole transmission layer, and first coloured light layer is described
Projection on hole transmission layer is Chong Die with the upper surface portion of the hole transmission layer, and the blu-ray layer covers institute
State the first coloured light layer and the hole transmission layer, the light conversion layer first coloured light layer projection with
The first coloured light layer segment is overlapped, and the light conversion layer is used for the portion for emitting first coloured light layer
Point the first coloured light switchs to the second coloured light, wherein, first coloured light and second coloured light are selected from green glow and red
One kind in light, and first coloured light and second coloured light are different.
Wherein in one embodiment, also including substrate, the anode layer being formed on the substrate and formation
Hole injection layer on the anode layer, the hole transmission layer is formed on the hole injection layer.
Wherein in one embodiment, the first coloured light layer includes multiple first coloured light regions, and the light turns
Changing layer includes multiple light transition regions, projection of the smooth transition region in the corresponding first coloured light region
The first coloured light region is divided into four regions, and the smooth transition region in corresponding first coloured light
The projection in region is non-conterminous.
A kind of preparation method of OLED display, the OLED display has as claimed in claim 1
OLED dot structure, the preparation method of the OLED display includes step：
The first coloured light layer is deposited with hole transmission layer using mask plate；
By the way of common evaporation, be deposited with blu-ray layer on the hole transport layer, the first coloured light layer with
The blu-ray layer constitutes luminescent layer；
Electron transfer layer and cathode layer are sequentially formed on the light-emitting layer；
Light conversion layer is formed on the cathode layer, the color of part first that first coloured light layer is emitted
Light switchs to the second coloured light；First coloured light and second coloured light are selected from the one kind in green glow and feux rouges, and
It is different.
Wherein in one embodiment, the first coloured light layer is deposited with hole transmission layer in the use mask plate
The step of before, also including step：
Anode layer is formed on substrate；
It is deposited with hole injection layer and hole transmission layer successively on the anode layer.
It is described to form light conversion layer on the cathode layer wherein in one embodiment, by first color
The step of coloured light of part first that photosphere is emitted switchs to the second coloured light, includes step：
Thin-film encapsulation layer is formed on the cathode layer；
Light conversion layer is formed in the thin-film encapsulation layer, the part that first coloured light layer is emitted
A shade switchs to the second coloured light, wherein, first coloured light and second coloured light are selected from green glow and feux rouges
One kind, it is and different.
Wherein in one embodiment, the light conversion layer is the colored filter doped with quantum dot.
Wherein in one embodiment, the light conversion layer is quantum dot film layer.
Wherein in one embodiment, the light conversion layer is the quantum dot film layer and colored filter for stacking gradually
Mating plate.
Dot structure, OLED display of above-mentioned OLED display and preparation method thereof, use mask plate
The first coloured light layer is deposited with hole transmission layer, again by the way of evaporation altogether, has the first coloured light layer in evaporation
Hole transmission layer on be deposited with blu-ray layer, the first coloured light layer constitutes luminescent layer with the blu-ray layer, on luminescent layer
Electron transfer layer and cathode layer are sequentially formed, then light conversion layer is formed on cathode layer, the light conversion layer is by
The coloured light of part first that photosphere of the same colour is emitted switchs to the second coloured light, and the first coloured light and the second coloured light are selected from green
One kind in light and feux rouges, and it is different, using the above method, realization reaches three using a mask plate
Color is lighted, and feux rouges layer and green glow layer need not be deposited with hole transmission layer, and being realized by light conversion layer will be luminous
The feux rouges or green portions launched in layer are converted to green glow or feux rouges, the size of pixel are reduced, so as to improve
The resolution ratio of OLED display.
Brief description of the drawings
Fig. 1 is the structural representation of the OLED display of the shared blu-ray layer of tradition；
Fig. 2 is the schematic flow sheet of the preparation method of the OLED display of an embodiment；
Fig. 3 is the structural representation of the OLED display of an embodiment；
Fig. 4 is the structural representation of the dot structure of the OLED display shown in Fig. 3；
Fig. 5 is the structural representation of the intermediate pixel structure of the OLED display shown in Fig. 3；
Fig. 6 is the structural representation of the mask plate of the green sub-pixels shown in Fig. 5；
Fig. 7 is the schematic flow sheet of the preparation method of the OLED display of another embodiment；
Fig. 8 is the structural representation of the OLED display of another embodiment；
Fig. 9 is the structural representation of the dot structure of the OLED display shown in Fig. 8；
Figure 10 is the structural representation of the intermediate pixel structure of the OLED display shown in Fig. 8；
Figure 11 is the structural representation of the mask plate of the red sub-pixel shown in Figure 10.
Specific embodiment
As shown in Fig. 2 the preparation method of the OLED display of an embodiment, including step：
S1：Green glow layer is deposited with hole transmission layer using mask plate.
Specifically, before step S1, the step of forming anode layer is additionally included on substrate and in the anode
The step of hole injection layer and hole transmission layer being deposited with successively on layer.As shown in figure 3, substrate 110 is glass
Substrate, anode layer 120 is formed in substrate 110.
In the present embodiment, the process for forming anode layer 120 is as follows：Ag is deposited with and sputtered on substrate 110
And ITO, there is the substrate 110 of ITO/Ag/ITO ultrasonically treated in cleaning agent by preparing, and utilize deionization
Water is rinsed, then, carried out in the mixed solvent of acetone and ethanol it is ultrasonically treated to go oil removing, then,
Dried under clean environment, then with ultraviolet light and ozone clean, and with low energy cation beam bombarded surface,
So as to form anode layer 120 on substrate 110.It should be noted that can also be using other modes in substrate
Anode layer 120 is formed on 110.
It is deposited with hole injection layer 130 and hole transmission layer 140 successively on anode layer 120.It should be noted that
Hole injection layer 130 and hole transmission layer 140 directly can also be prepared on anode layer 120 using cladding process.
Then green glow layer 151 is deposited with hole transmission layer using mask plate.
S2：By the way of common evaporation, blu-ray layer, green glow layer and blu-ray layer structure are deposited with hole transmission layer
Into luminescent layer.
Specifically, in the present embodiment, by the way of common evaporation, it is deposited with hole transmission layer 140 blue
Photosphere 152.For green glow layer 151 is deposited with hole transmission layer 140, the blu-ray layer 152 covering green glow
The region that the upper surface of layer 151 and hole transmission layer 140 is not covered by green glow layer 151, as shown in figure 3,
Green glow layer 151 and blu-ray layer 152 constitute luminescent layer 150, wherein, it is green by the way that green luminescence region is limited in
Emission wavelength is set to be limited in green wavelength in photosphere 151, so that the luminescent layer 150 is launched
Green glow 1511 and blue light 1512.
S3：Electron transfer layer and cathode layer are sequentially formed on luminescent layer.
Specifically, as Fig. 3 is respectively shown in, electron transfer layer 160 and the moon are deposited with successively on luminescent layer 150
Pole layer 170.
S4：Light conversion layer is formed on cathode layer, the part green glow that green glow layer is emitted is switched into feux rouges.
Specifically, in the present embodiment, light conversion layer 180, the light conversion layer are formed on cathode layer 170
The part green glow 1511 that green glow layer 151 is emitted is switched to feux rouges 1513 by 180.Wherein, light conversion layer
180 projection on green glow layer 151 is Chong Die with the upper surface portion of green glow layer 151, so that green glow layer 151 is sent out
When the green glow 1511 for shooting out passes through light conversion layer 180, the green glow 1511 of this part is converted to feux rouges 1513,
So as to realize three-colour light-emitting.
Preferably, light conversion layer 180 includes multiple light transition regions, and green glow layer 151 includes multiple green Regions
Green wavelength is divided into four regions, light transition zone by domain, light transition region in the projection of corresponding green wavelength
Domain is non-conterminous in the projection of corresponding green wavelength, so as to ensure the feux rouges that sends and green glow than more uniform.
Additionally, the dot structure for the OLED display is as shown in figure 4, dot structure 200 is including more
Individual pixel cell group 210, pixel cell group 210 include the first pixel cell group 211 and with the first pixel cell
211 the second adjacent pixel cell groups 212 of group.First pixel cell group 211 and the second pixel cell group 212
Include multiple pixel cells 220.
Pixel cell 220 includes the first sub-pixel 221, the second sub-pixel 222 and the 3rd sub-pixel 223.
The second sub-pixel 222 and the 3rd sub-pixel 223 in pixel cell 220 is along in pixel cell 220
One sub-pixel 221 wherein while forming a line.In the present embodiment, the first sub-pixel 221 is blue son
Pixel, the second sub-pixel 222 is red sub-pixel, and the 3rd sub-pixel 223 is green sub-pixels.Red son
Pixel and green sub-pixels along blue subpixels wherein while form a line, red sub-pixel and green
Sub-pixel is symmetric, and red sub-pixel is identical with the size of green sub-pixels, and shape is also identical, is
Square.Blue subpixels are shaped as rectangle, and the area of blue subpixels is the face of red sub-pixel
Long-pending twice, such that it is able to slow down blue light decay, the life-span of prolonged display.
It should be noted that the shape of pixel cell 220 can also be circle, regular hexagon etc..Red son
The size and shape of pixel and green sub-pixels can also be differed.
The every pixel cell 220 of the even bit in the first pixel cell of row group 211 and the second pixel cell group 212
Central plane rotation 180 degree according to the pixel cell 220 of the odd bits in the row pixel cell group forms it
The arrangement mode of blue subpixels, red sub-pixel and green sub-pixels, so that any on line direction
One of pixel cell 220 in two adjacent pixel cells 220 is in one other pixel unit 220
Heart Plane Rotation 180 degree is obtained.
To two pixel cells 220 in the pixel cell group of adjacent rows positioned at same row, one of pixel
Unit 220 according to one other pixel unit 220 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.For example, the composition a line of the first pixel cell group 211,
Second pixel cell group 212 constitutes a line adjacent with the first pixel cell group 211, the second pixel cell group
212 and first are located in two pixel cells 220 of same row in pixel cell group 211, one of pixel
Unit 220 according to one other pixel unit 220 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.
The OLED has dot structure as shown in Figure 4, from the preparation method of above-mentioned OLED
In understand, in preparation process, by the effect of intermediate pixel structure and light conversion layer 180 so that the OLED
Device has dot structure as shown in Figure 4.
Specifically, as shown in figure 5, intermediate pixel structure 300 includes multiple pixels arranged in ranks form
Unit 310, pixel cell 310 includes blue subpixels 311 and two green sub-pixels 312.Pixel cell
310 be shaped as square, and blue subpixels 311 are shaped as rectangle, the shape of green sub-pixels 312
Be square, and two green sub-pixels 312 along the blue subpixels 311 in the pixel cell its
Middle one side forms a line.
Blue subpixels 311 in the adjacent pixel cell 310 in part on line direction are adjacent, on column direction
Adjacent pixel cell 310 in blue subpixels 311 be staggered, the part on line direction is adjacent
Green sub-pixels 312 in pixel cell 310 are adjacent, in the adjacent pixel cell 310 on column direction
Green sub-pixels 312 are staggered.
It should be noted that pixel cell 310 can also be other shapes, such as circle.
Because the green sub-pixels 312 in the adjacent pixel cell 310 in the part on line direction are adjacent, so that
The mask plate of green sub-pixels 312 is as shown in Figure 6.
In step sl, using green sub-pixels mask plate as shown in Figure 6, on hole transmission layer 140
Evaporation green glow layer 151, as shown in Figure 3.Green glow 151 projection on hole transmission layer 140 of layer is passed with hole
The upper surface portion of defeated layer 140 is overlapped.
Green sub-pixels 312 in the adjacent pixel cell 310 in part are adjacent, so that adjacent green sub- picture
Element 312 forms green wavelength, and the green wavelength is shaped as square, by light conversion layer 180
Effect, the green wavelength includes four sub-pixel areas, in this four sub-pixel areas, adjacent sub-pixel area
Color it is different, that is to say, that two green glows of sub-pixel area on the diagonal of green wavelength turn
It is changed to feux rouges.So as to the effect that the intermediate pixel structure 300 shown in Fig. 5 passes through light conversion layer 180 so that
OLED has dot structure 200 as shown in Figure 4.
In other embodiments, thin-film encapsulation layer is formed with cathode layer 170, now, light conversion layer 180
In thin-film encapsulation layer.
Additionally, light conversion layer 180 be doped with quantum dot colored filter or quantum dot film layer or
Quantum dot film layer and colored filter that person stacks gradually.Preferably, light conversion layer 180 is doped with amount
The colored filter of son point.Light conversion layer 180 is formed on cathode layer 170 by photoetching or transfer modes.
The preparation method of above-mentioned OLED display, is deposited with green glow layer, altogether the side of evaporation using 1 mask plate
Formula is deposited with blu-ray layer, then realizes three-colour light-emitting by light conversion layer, also realizes only obtaining two with a mask plate
The individual pixel containing RGB, in the case where mask plate opening size is constant, reduces the size of pixel, improves and divides
Resolution, substantially reduces technology difficulty, improves yield.
As shown in fig. 7, the preparation method of the OLED display of another embodiment, including step：
S10：Feux rouges layer is deposited with hole transmission layer using mask plate.
Specifically, before step S10, the step of forming anode layer is additionally included on substrate and in the sun
The step of hole injection layer and hole transmission layer being deposited with successively on the layer of pole.As shown in figure 8, substrate 410 is glass
Glass substrate, anode layer 420 is formed in substrate 410.
In the present embodiment, the process for forming anode layer 420 is as follows：Ag is deposited with and sputtered on substrate 410
And ITO, there is the substrate 410 of ITO/Ag/ITO ultrasonically treated in cleaning agent by preparing, and utilize deionization
Water is rinsed, then, carried out in the mixed solvent of acetone and ethanol it is ultrasonically treated to go oil removing, then,
Dried under clean environment, then with ultraviolet light and ozone clean, and with low energy cation beam bombarded surface,
So as to form anode layer 420 on substrate 410.It should be noted that can also be using other modes in substrate
Anode layer 420 is formed on 410.
It is deposited with hole injection layer 430 and hole transport 440 successively on anode layer 420.It should be noted that
Hole injection layer 430 and hole transmission layer 440 directly can also be prepared using cladding process on anode layer 420.
Then feux rouges layer 451 is deposited with hole transmission layer using mask plate.
S20：By the way of common evaporation, blu-ray layer, feux rouges layer and blu-ray layer structure are deposited with hole transmission layer
Into luminescent layer.
Specifically, in the present embodiment, by the way of common evaporation plating, it is deposited with hole transmission layer 440
Blu-ray layer 452.For feux rouges layer 451 is deposited with hole transmission layer 440, the blu-ray layer 452 covers red
The region that the upper surface of photosphere 451 and hole transmission layer 440 is not covered by feux rouges layer 451, such as Fig. 8 institutes
Show, feux rouges layer 451 and blu-ray layer 452 constitute luminescent layer 450, wherein, limited by by red light-emitting region
Emission wavelength is set to be limited in red wavelength range in feux rouges layer 451, so that the luminescent layer 450
Transmitting feux rouges 4511 and blue light 4512.
S30：Electron transfer layer and cathode layer are sequentially formed on luminescent layer.
Specifically, as Fig. 3 is respectively shown in, electron transfer layer 460 and the moon are deposited with successively on luminescent layer 450
Pole layer 470.
S40：Light conversion layer is formed on cathode layer, the part feux rouges that feux rouges layer is emitted is switched into green glow.
Specifically, in the present embodiment, light conversion layer 480, the light conversion layer are formed on cathode layer 470
The part feux rouges 4511 that feux rouges layer 451 is emitted is switched to green glow 4513 by 480.Wherein, light conversion layer
480 projection on feux rouges layer 451 is Chong Die with the upper surface portion of feux rouges layer 451, so that feux rouges layer 451 is sent out
When the feux rouges 4511 for shooting out passes through light conversion layer 480, the feux rouges 4511 of this part is converted to green glow 4513,
So as to realize three-colour light-emitting.
Preferably, light conversion layer 480 includes multiple light transition regions, and feux rouges layer 451 includes multiple red light districts
Red light region is divided into four regions, light transition zone by domain, projection of the light transition region in corresponding red light region
Projection of the domain in corresponding red light region is non-conterminous, so as to ensure the feux rouges that sends and green glow than more uniform.
Additionally, the dot structure for the OLED display is as shown in figure 9, dot structure 500 is including more
Individual pixel cell group 510, pixel cell group 510 include the first pixel cell group 511 and with the first pixel cell
511 the second adjacent pixel cell groups 512 of group.First pixel cell group 511 and the second pixel cell group 512
Include multiple pixel cells 520.
Pixel cell 520 includes the first sub-pixel 521, the second sub-pixel 522 and the 3rd sub-pixel 523.
The second sub-pixel 522 and the 3rd sub-pixel 523 in pixel cell 520 is along in pixel cell 520
One sub-pixel 521 wherein while forming a line.In the present embodiment, the first sub-pixel 521 is blue son
Pixel, the second sub-pixel 522 is red sub-pixel, and the 3rd sub-pixel 523 is green sub-pixels.Red son
Pixel and green sub-pixels along blue subpixels wherein while form a line, red sub-pixel and green
Sub-pixel is symmetric, and red sub-pixel is identical with the size of green sub-pixels, and shape is also identical, is
Square.Blue subpixels are shaped as rectangle, and the area of blue subpixels is the face of red sub-pixel
Long-pending twice, such that it is able to slow down blue light decay, the life-span of prolonged display.
It should be noted that the shape of pixel cell 520 can also be circle, regular hexagon etc..Red son
The size and shape of pixel and green sub-pixels can also be differed.
The every pixel cell 520 of the even bit in the first pixel cell of row group 511 and the second pixel cell group 512
Central plane rotation 180 degree according to the pixel cell 520 of the odd bits in the row pixel cell group forms it
The arrangement mode of blue subpixels, red sub-pixel and green sub-pixels, so that any on line direction
One of pixel cell 520 in two adjacent pixel cells 520 is in one other pixel unit 520
Heart Plane Rotation 180 degree is obtained.
To two pixel cells 520 in the pixel cell group of adjacent rows positioned at same row, one of pixel
Unit 520 according to one other pixel unit 520 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.For example, the composition a line of the first pixel cell group 511,
Second pixel cell group 512 constitutes a line adjacent with the first pixel cell group 511, the second pixel cell group
512 and first are located in two pixel cells 520 of same row in pixel cell group 511, one of pixel
Unit 520 according to one other pixel unit 520 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.
The OLED has dot structure as shown in Figure 9, from the preparation method of above-mentioned OLED
In understand, in preparation process, by the effect of intermediate pixel structure and light conversion layer 480 so that the OLED
Device has dot structure as shown in Figure 9.
Specifically, as shown in Figure 10, intermediate pixel structure 600 includes multiple pixels arranged in ranks form
Unit 610, pixel cell 610 includes blue subpixels 611 and two red sub-pixels 612.Pixel cell
610 be shaped as square, and blue subpixels 611 are shaped as rectangle, the shape of red sub-pixel 612
Be square, and two red sub-pixels 312 along the blue subpixels 311 in the pixel cell its
Middle one side forms a line.
Blue subpixels 611 in the adjacent pixel cell 610 in part on line direction are adjacent, on column direction
Adjacent pixel cell 610 in blue subpixels 611 be staggered, the part on line direction is adjacent
Red sub-pixel 612 in pixel cell 610 is adjacent, in the adjacent pixel cell 610 on column direction
Red sub-pixel 612 is staggered.
It should be noted that pixel cell 610 can also be other shapes, such as circle.
Because the red sub-pixel 612 in the adjacent pixel cell 610 in the part on line direction is adjacent, so that
The mask plate of red sub-pixel 612 is as shown in figure 11.
In step slo, using red sub-pixel mask plate as shown in figure 11, in hole transmission layer 440
Upper evaporation feux rouges layer 451, as shown in Figure 8.Feux rouges 451 projection and hole on hole transmission layer 440 of layer
The upper surface portion of transport layer 440 is overlapped.
Red sub-pixel 612 in the adjacent pixel cell 610 in part is adjacent, so that adjacent red sub- picture
Element 612 forms red light region, and the red light region is shaped as square, by light conversion layer 480
Effect, the red light region includes four sub-pixel areas, in this four sub-pixel areas, adjacent sub-pixel area
Color it is different, that is to say, that two feux rouges of sub-pixel area on the diagonal of red light region turn
It is changed to green glow.So as to the effect that the intermediate pixel structure 600 shown in Figure 10 passes through light conversion layer 480 so that
OLED has dot structure 500 as shown in Figure 9.
In other embodiments, thin-film encapsulation layer is formed with cathode layer 470, now, light conversion layer 480
In thin-film encapsulation layer.
Additionally, light conversion layer 480 is the colored filter or upper switching film doped with up-conversion
Layer or the upper switching film layer and colored filter that stack gradually.Preferably, light conversion layer 480 is doping
There is the colored filter of up-conversion.Light conversion layer 480 is formed at cathode layer by photoetching or transfer modes
On 470.
The preparation method of above-mentioned OLED display, is deposited with feux rouges layer, altogether the side of evaporation using 1 mask plate
Formula is deposited with blu-ray layer, then realizes three-colour light-emitting by light conversion layer, also realizes only obtaining two with a mask plate
The individual pixel containing RGB, in the case where mask plate opening size is constant, reduces the size of pixel, improves and divides
Resolution, substantially reduces technology difficulty, improves yield.
As shown in figure 3, the OLED display 100 of an embodiment includes substrate 110, stack gradually in substrate
Anode layer 120, hole injection layer 130 on 110, hole transmission layer 140, luminescent layer 150, electric transmission
Layer 160, cathode layer 170 and light conversion layer 180.
Specifically, in the present embodiment, substrate 110 is glass substrate, and luminescent layer 150 includes green glow layer 151
With blu-ray layer 152, green glow layer 151 is located on hole transmission layer 140, and green glow layer 151 is in hole transmission layer
Projection on 140 is Chong Die with the upper surface portion of hole transmission layer 140, the covering green glow of blu-ray layer 152 layer 151
And hole transmission layer 140, the upper table of projection and green glow layer 151 of the light conversion layer 180 on green glow layer 151
Face partly overlaps, and light conversion layer 180 is used to for the green glow that green glow layer 151 is emitted to be converted to feux rouges.
Preferably, light conversion layer 180 includes multiple light transition regions, and green glow layer 151 includes multiple green Regions
Green wavelength is divided into four regions by domain, light transition region in the projection of corresponding green wavelength, and light is changed
Region is non-conterminous in the projection of corresponding green wavelength.
As shown in figure 8, the OLED display 400 of another embodiment includes substrate 410, stack gradually in base
Anode layer 420, hole injection layer 430 on plate 410, hole transmission layer 440, luminescent layer 450, electronics
Transport layer 460, cathode layer 470 and light conversion layer 480.
Specifically, in the present embodiment, substrate 410 is glass substrate, and luminescent layer 450 includes feux rouges layer 451
With blu-ray layer 452, feux rouges layer 451 is located on hole transmission layer 440, and feux rouges layer 451 is in hole transmission layer
Projection on 440 is Chong Die with the upper surface portion of hole transmission layer 440, the covering feux rouges of blu-ray layer 452 layer 451
And hole transmission layer 440, the upper table of projection and feux rouges layer 451 of the light conversion layer 480 on feux rouges layer 451
Face partly overlaps, and light conversion layer 480 is used to for the feux rouges that feux rouges layer 451 is emitted to be converted to green glow.
Preferably, light conversion layer 480 includes multiple light transition regions, and feux rouges layer 451 includes multiple red light districts
Red light region is divided into four regions by domain, projection of the light transition region in corresponding red light region, and light is changed
Projection of the region in corresponding red light region is non-conterminous.
Above-mentioned OLED display, with high-resolution.
As shown in figure 4, the dot structure 200 of an embodiment includes multiple pixel cell groups 210, pixel cell
Group 210 includes the first pixel cell group 211 and second pixel cell adjacent with the first pixel cell group 211
Group 212.First pixel cell group 211 and the second pixel cell group 212 include multiple pixel cells 220.
Pixel cell 220 includes the first sub-pixel 221, the second sub-pixel 222 and the 3rd sub-pixel 223.
The second sub-pixel 222 and the 3rd sub-pixel 223 in pixel cell 220 is along in pixel cell 220
The first sub-pixel 221 wherein while forming a line.In the present embodiment, the first sub-pixel 221 is indigo plant
Sub-pixels, the second sub-pixel 222 is red sub-pixel, and the 3rd sub-pixel 223 is green sub-pixels.It is red
Sub-pixels and green sub-pixels along blue subpixels wherein while form a line, red sub-pixel and
Green sub-pixels are symmetric, and red sub-pixel is identical with the size of green sub-pixels, and shape is also identical,
It is square.Blue subpixels are shaped as rectangle, and the area of blue subpixels is red sub-pixel
Area twice, such that it is able to slow down blue light decay, the life-span of prolonged display.
It should be noted that the shape of pixel cell 220 can also be circle, regular hexagon etc..Red son
The size and shape of pixel and green sub-pixels can also be differed.The every He of the first pixel cell of row group 211
The pixel cell 220 of the even bit in the second pixel cell group 212 is according to the odd number in the row pixel cell group
Position pixel cell 220 central plane rotation 180 degree formed its blue subpixels, red sub-pixel and
The arrangement mode of green sub-pixels, so that on line direction in the adjacent pixel cell 220 of any two
One of pixel cell 220 is that the central plane of one other pixel unit 220 rotation 180 degree is obtained.
To two pixel cells 220 in the pixel cell group of adjacent rows positioned at same row, one of pixel
Unit 220 according to one other pixel unit 220 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.For example, the composition a line of the first pixel cell group 211,
Second pixel cell group 212 constitutes a line adjacent with the first pixel cell group 211, the second pixel cell group
212 and first are located in two pixel cells 220 of same row in pixel cell group 211, one of pixel
Unit 220 according to one other pixel unit 220 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.
As shown in figure 9, the dot structure 500 of another embodiment includes multiple pixel cell groups 510, pixel list
Tuple 510 includes the first pixel cell group 511 and the second pixel list adjacent with the first pixel cell group 511
Tuple 512.First pixel cell group 511 and the second pixel cell group 512 include multiple pixel cells 520.
Pixel cell 520 includes the first sub-pixel 521, the second sub-pixel 522 and the 3rd sub-pixel 523.
The second sub-pixel 522 and the 3rd sub-pixel 523 in pixel cell 520 is along in pixel cell 520
One sub-pixel 521 wherein while forming a line.In the present embodiment, the first sub-pixel 521 is blue son
Pixel, the second sub-pixel 522 is red sub-pixel, and the 3rd sub-pixel 523 is green sub-pixels.Red son
Pixel and green sub-pixels along blue subpixels wherein while form a line, red sub-pixel and green
Sub-pixel is symmetric, and red sub-pixel is identical with the size of green sub-pixels, and shape is also identical, is
Square.Blue subpixels are shaped as rectangle, and the area of blue subpixels is the face of red sub-pixel
Long-pending twice, such that it is able to slow down blue light decay, the life-span of prolonged display.
It should be noted that the shape of pixel cell 520 can also be circle, regular hexagon etc..Red son
The size and shape of pixel and green sub-pixels can also be differed.
The every pixel cell 520 of the even bit in the first pixel cell of row group 511 and the second pixel cell group 512
Central plane rotation 180 degree according to the pixel cell 520 of the odd bits in the row pixel cell group forms it
The arrangement mode of blue subpixels, red sub-pixel and green sub-pixels, so that any on line direction
One of pixel cell 520 in two adjacent pixel cells 520 is in one other pixel unit 520
Heart Plane Rotation 180 degree is obtained.
To two pixel cells 520 in the pixel cell group of adjacent rows positioned at same row, one of pixel
Unit 520 according to one other pixel unit 520 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.For example, the composition a line of the first pixel cell group 511,
Second pixel cell group 512 constitutes a line adjacent with the first pixel cell group 511, the second pixel cell group
512 and first are located in two pixel cells 520 of same row in pixel cell group 511, one of pixel
Unit 520 according to one other pixel unit 520 central plane rotation 180 degree formed its blue subpixels,
The arrangement mode of red sub-pixel and green sub-pixels.
Dot structure, OLED display of above-mentioned OLED display and preparation method thereof, by red or
Green sub-pixels mask plate, is deposited with the first coloured light layer on hole transmission layer, again by the way of evaporation altogether,
Have in evaporation and blu-ray layer is deposited with the hole transmission layer of the first coloured light layer, the first coloured light layer is constituted with the blu-ray layer
Luminescent layer, sequentially forms electron transfer layer and cathode layer on luminescent layer, then light conversion is formed on cathode layer
The feux rouges part feux rouges that emits of layer is switched to green glow or emits green glow layer by layer, the light conversion layer
Part green glow switchs to feux rouges, and using the above method, realization reaches three-colour light-emitting using a mask plate, in sky
Feux rouges layer or green glow layer need not be deposited with the transport layer of cave, realize to launch in luminescent layer by light conversion layer
Feux rouges or green portions are converted to green glow or feux rouges, the size of pixel are reduced, so as to improve OLED display
Resolution ratio.
Each technical characteristic of embodiment described above can be combined arbitrarily, not right to make description succinct
The all possible combination of each technical characteristic in above-described embodiment is all described, as long as however, these skills
The combination of art feature does not exist contradiction, is all considered to be the scope of this specification record.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed,
But can not therefore be construed as limiting the scope of the patent.It should be pointed out that for this area
For those of ordinary skill, without departing from the inventive concept of the premise, some deformations can also be made and changed
Enter, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended power
Profit requires to be defined.
Claims (10)
1. a kind of dot structure of OLED display, including multirow pixel cell group, often go the pixel list
Tuple includes being alternately repeated multiple pixel cells of arrangement successively, the pixel cell include the first sub-pixel,
Second sub-pixel and the 3rd sub-pixel；Characterized in that, second sub-pixel in the pixel cell
With the 3rd sub-pixel along the first sub-pixel in the pixel cell wherein while forming a line；
The pixel cell adjacent to any two in pixel cell group described in every row, one of pixel cell
Central plane rotation 180 degree according to one other pixel unit forms its first sub-pixel, described second
The arrangement mode of sub-pixel and the 3rd sub-pixel；
To two pixel cells in the pixel cell group of adjacent rows positioned at same row, one of picture
Plain unit forms its first sub-pixel, institute according to the central plane rotation 180 degree of one other pixel unit
State the arrangement mode of the second sub-pixel and the 3rd sub-pixel.
2. a kind of OLED display, it is characterised in that the OLED display has such as claim 1
The dot structure of described OLED, the OLED display includes hole transmission layer, and sequentially forms
In the luminescent layer on the hole transmission layer, electron transfer layer, cathode layer and light conversion layer, wherein, institute
Stating luminescent layer includes the first coloured light layer and blu-ray layer, and the first coloured light layer is located on the hole transmission layer,
And the upper surface portion of the projection on the hole transport layer of first coloured light layer and the hole transmission layer
Overlap, the blu-ray layer covers the first coloured light layer and the hole transmission layer, the light conversion layer exists
The projection of the first coloured light layer is Chong Die with the first coloured light layer segment, and the light conversion layer is used for will be described
The first coloured light coloured light of part first that emits of layer switchs to the second coloured light, wherein, first coloured light and institute
State the one kind during the second coloured light is selected from green glow and feux rouges, and first coloured light and the mutual not phase of second coloured light
Together.
3. OLED display according to claim 2, it is characterised in that also including substrate, formed
In the anode layer on the substrate and the hole injection layer being formed on the anode layer, the hole transport
Layer is formed on the hole injection layer.
4. OLED display according to claim 3, it is characterised in that the first coloured light layer bag
Multiple first coloured light regions are included, the light conversion layer includes multiple light transition regions, and the smooth transition region exists
The first coloured light region is divided into four regions, and the light by the projection in the corresponding first coloured light region
Projection of the transition region in the corresponding first coloured light region is non-conterminous.
5. a kind of preparation method of OLED display, it is characterised in that the OLED display has such as
The dot structure of the OLED described in claim 1, the preparation method of the OLED display includes step：
The first coloured light layer is deposited with hole transmission layer using mask plate；
By the way of common evaporation, be deposited with blu-ray layer on the hole transport layer, the first coloured light layer with
The blu-ray layer constitutes luminescent layer；
Electron transfer layer and cathode layer are sequentially formed on the light-emitting layer；
Light conversion layer is formed on the cathode layer, the color of part first that first coloured light layer is emitted
Light switchs to the second coloured light；First coloured light and second coloured light are selected from the one kind in green glow and feux rouges, and
It is different.
6. the preparation method of OLED display according to claim 5, it is characterised in that described
Before the step of the first coloured light layer is deposited with hole transmission layer using mask plate, also including step：
Anode layer is formed on substrate；
It is deposited with hole injection layer and hole transmission layer successively on the anode layer.
7. the preparation method of OLED display according to claim 5, it is characterised in that it is described
Light conversion layer is formed on the cathode layer, the coloured light of part first that first coloured light layer is emitted is switched to
The step of second the first coloured light of coloured light layer, includes step：
Thin-film encapsulation layer is formed on the cathode layer；
Light conversion layer is formed in the thin-film encapsulation layer, by the first color emissions of first coloured light layer out
The coloured light of part first switch to the second coloured light, wherein, first coloured light and second coloured light are selected from green glow
With the one kind in feux rouges, it is and different.
8. the preparation method of the OLED display according to any one of claim 5-7, its feature exists
In the light conversion layer is the colored filter doped with quantum dot.
9. the preparation method of the OLED display according to any one of claim 5-7, its feature exists
In the light conversion layer is quantum dot film layer.
10. the preparation method of the OLED display according to any one of claim 5-7, its feature
It is that the light conversion layer is the quantum dot film layer and colored filter for stacking gradually.
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