CN103904105A - Pixel structure of OLED display screen - Google Patents

Pixel structure of OLED display screen Download PDF

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Publication number
CN103904105A
CN103904105A CN201410091051.XA CN201410091051A CN103904105A CN 103904105 A CN103904105 A CN 103904105A CN 201410091051 A CN201410091051 A CN 201410091051A CN 103904105 A CN103904105 A CN 103904105A
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pixel
sub
adjacent
pixels
display screen
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魏志凌
高小平
魏志浩
潘世珎
赵录军
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Kunshan Power Stencil Co Ltd
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Kunshan Power Stencil Co Ltd
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Abstract

The invention discloses a pixel structure of an OLED display screen. The pixel structure comprises pixel units which are arranged on the OLED display screen and arrayed according to a preset law, each pixel unit comprises a first sub-pixel, a second sub-pixel and a third sub-pixel, the first sub-pixel, the second sub-pixel and the third sub-pixel are in an octagon shape, each octagon is provided with four sets of opposite sides in parallel, and the lengths of the adjacent sides of any two adjacent sub-pixels are equal, and the straight lines where the adjacent sides of any two adjacent sub-pixels are consistent in direction. According to the pixel structure of the OLED display screen, the area of blue sub-pixels in all the pixel units of an OLED can be increased, the ppi of a displayer can be improved, correspondingly, service life of the blue sub-pixels is prolonged, and the display quality of the OLED display screen is improved.

Description

A kind of dot structure of OLED display screen
Technical field
The present invention relates to a kind of dot structure of OLED display screen.
Background technology
Organic Light Emitting Diode (Organic Light-Emitting Diode; OLED) display has a series of advantages such as independently luminous, low-voltage direct-current drives, entirely solidifies, visual angle is wide, color is abundant, compared with liquid crystal display, OLED display does not need backlight, visual angle is large, power is low, its response speed can reach 1000 times of liquid crystal display, and its manufacturing cost is but lower than the liquid crystal display of equal resolution.Therefore, OLED displaying appliance has broad application prospects, and becomes gradually the following 20 years the fastest novel Display Techniques of growth.
Wherein, the luminescent layer of OLED screen body is all generally to utilize evaporation film-forming technology to see through metal mask plate corresponding location of pixels in deposition substrate by organic material to form organic emitting components.The good Pixel arrangement mode of OLED screen colorize effect is to have three sub-pixels of red, green, blue at each pixel cell, and each sub-pixel has independently organic light emission components and parts.Due to the luminous organic material difference of red, green, blue three sub pixels, in manufacturing process, need to by metal mask plate on corresponding position respectively to three kinds of different organic materials of red, green, blue three-color light-emitting sub-pixel evaporation, then regulate the colour mixture ratio of three kinds of color combination, produce true color.So, pixel cell of the independent luminous formation of red, green, blue three look OLED elements.
The life-span of OLED display screen and the degree of association of pixel are very large, it is the life-span that has determined to a great extent OLED display screen in life-span of pixel, in industry, be blue subpixels for the bottleneck of making pixel at present, its reason is that the luminous efficiency of blue subpixels under equal electric current is starkly lower than green and red sub-pixel (gap is very large), in order to make OLED display screen display white normally, can only improve the electric current of blue subpixels, although it is green and red to have done balance like this, but because electric current has improved, the life-span of blue subpixels shortens greatly, thereby affect the life-span of OLED display screen.
In addition, as another important parameter---the resolution of evaluating OLED display screen quality, the arrangement of itself and pixel is contacted directly, and the OLED display screen of making high ppi (pixel per inch) is the important goal that industry is pursued always.
The present invention is mainly the dot structure that proposes a kind of OLED display screen for above problem, to solve preferably the above problem.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of dot structure of OLED display screen, increase the area of blue subpixels in the each pixel cell of OLED, the ppi of raising display, thereby make accordingly the life-span increase of blue subpixels, the display quality of OLED display screen improve.
The invention provides a kind of dot structure of OLED display screen, described dot structure comprises the pixel cell of arranging by default rule being arranged on described OLED display screen, described pixel cell comprises the first sub-pixel, the second sub-pixel, the 3rd sub-pixel three sub pixels, it is characterized in that: described the first sub-pixel, the second sub-pixel, the 3rd sub-pixel be shaped as octagon, described octagon has four groups of parallel opposite side, and equal in length and its place rectilinear direction of the adjacent edge of two described sub-pixels of arbitrary neighborhood is consistent.
Further, the size dimension of described octagonal four groups of opposite side is respectively a1, a2, a3, a4, and its size range and correlation are: 10 μ m≤a1≤35 μ m; 10 μ m≤a2≤35 μ m; 5 μ m≤a3≤25 μ m; A3=a4; Place, the limit straight line of the described a1 of being of a size of is perpendicular to described place, the limit straight line that is of a size of a2.
Further, the distance of one group of opposite side that the described length of side is a1 is b1, and the size range of described b1 is 30 μ m≤b1≤60 μ m; The described length of side is that the distance of one group of opposite side of a2 is b2, and the size range of described b2 is 30 μ m≤b2≤60 μ m.
Further, described the first sub-pixel is blue subpixels, described the second sub-pixel is that red sub-pixel, described the 3rd sub-pixel are green sub-pixels, the quantity of described blue subpixels is the twice of green sub-pixels or red sub-pixel quantity, described blue subpixels, described red sub-pixel, described green sub-pixels position non-overlapping copies, the position of the position of described the second sub-pixel and described the 3rd sub-pixel can exchange.
Further, described blue subpixels is arranged in rectangular array mode with column direction in the row direction, and the distance described in adjacent two row between blue subpixels is L2, and the pass of described a2 and described L2 is: a2≤L2; Distance between the described blue subpixels of adjacent two row is L1, and the pass of described a1 and described L1 is: a1≤L1.
Further, described red sub-pixel is arranged successively with column direction in the row direction, and described in adjacent two row, red sub-pixel is dislocation arrangement in the row direction, and the described red sub-pixel of adjacent two row is dislocation arrangement along column direction; Described green sub-pixels is identical with the arrangement mode of described red sub-pixel; Described red sub-pixel and described green sub-pixels are staggered with column direction in the row direction; In the row direction or on column direction, described red sub-pixel is adjacent the spacing between blue subpixels described in the spacing and adjacent two between described green sub-pixels and equates.
Further, the line space of adjacent two odd-numbered lines or the above red sub-pixel of even number line or green sub-pixels is L3, and described L2, described b1, described L3 three's pass is: L3=2L2+2b1; The column pitch of adjacent two odd columns or the above red sub-pixel of even column or green sub-pixels is L4, and described L1, described b2, described L4 three's pass is: L4=2L1+2b2.
Further, described red sub-pixel, described green sub-pixels are all arranged in rectangular array mode with column direction in the row direction, and the described red sub-pixel of adjacent two row or the line space of green sub-pixels are the twice of the line space of the described blue subpixels of adjacent two row, the adjacent two described red sub-pixel of row or the column pitch of green sub-pixels equate with the column pitch of the described blue subpixels of adjacent two row.
Further, the line space of red sub-pixel or green sub-pixels is L5 described in adjacent two row, and described L2, described b1, described L5 three's pass is: L5=2L2+2b1.
The dot structure of a kind of OLED display screen provided by the present invention, it is advantageous that: the area that greatly increases blue subpixels in the each pixel cell of OLED, make in the time of balance red sub-pixel and green sub-pixels, without blue subpixels being provided to excessive electric current, get final product normal display white, thereby increase accordingly the life-span of blue subpixels, indirectly extended the bulk life time of OLED display screen; In addition, OLED display screen can have higher ppi, has improved the display quality of display screen.
 
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obviously and easily from the following description of the accompanying drawings of embodiments to be understood, wherein:
Figure 1 shows that traditional OLED display screen matrix structure enlarged diagram;
Fig. 2 ~ Figure 5 shows that several OLED display screen matrix structure enlarged diagram of the present invention;
Fig. 6 ~ the Figure 9 shows that mask plate structure for amplifying schematic diagram of the present invention for evaporation OLED display screen matrix;
In Fig. 1,10 is the deposition substrate of OLED display screen, and 11 is pixel cell, R, G, B represent three sub-pixels of red, green, blue, D1 is the center distance of adjacent two pixel cells along directions X, and H1 is the length dimension of sub-pixel along directions X, and H2 is the distance between adjacent two row sub-pixels;
In Fig. 2,20 is the deposition substrate of OLED display screen, L1 is the distance between adjacent two row blue subpixels, L2 is the distance between adjacent two row blue subpixels, L3 is the line space of red sub-pixel or green sub-pixels in adjacent two odd-numbered lines or even number line, and L4 is the column pitch of red sub-pixel or green sub-pixels on adjacent two odd columns or even column;
In Fig. 3, L5 is the line space of adjacent two row red sub-pixel or green sub-pixels;
In Fig. 4, a1, a2, a3, a4 are respectively the size dimension of four groups of opposite side of octagon sub-pixel, and D2 is the center distance of adjacent two pixel cells along directions X, and 41 is a pixel cell;
In Fig. 6,60 is mask plate, and 61 is the evaporation hole on mask plate, and 62 is virtual evaporation hole;
In Fig. 7, A1, A2, A3, A4 are respectively the size dimension of the four groups of opposite side in octagon evaporation hole, and L6 is the column pitch in adjacent two row evaporation holes, and L7 is the line space in adjacent two row evaporation holes, B1 is that the length of side is the distance of one group of opposite side of A1, and B2 is that the length of side is the distance of one group of opposite side of A2;
In Fig. 8, L8 is the line space in adjacent two odd-numbered lines or adjacent two even number line evaporation holes on mask plate, and L9 is the column pitch in adjacent two odd columns or adjacent two even column evaporation holes on mask plate;
In Fig. 9, L10 is the line space in the evaporation hole of adjacent two row.
 
Embodiment
Describe below with reference to accompanying drawings embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
According to embodiments of the invention, shown in figure 2 ~ Fig. 5, the invention provides a kind of dot structure of OLED display screen, described dot structure comprises the pixel cell 40 of arranging by default rule being arranged on OLED display screen, pixel cell 40 comprises the first sub-pixel, the second sub-pixel, the 3rd sub-pixel three sub pixels, the first sub-pixel, the second sub-pixel, the 3rd sub-pixel be shaped as octagon, described octagon has four groups of parallel opposite side, and equal in length and its place rectilinear direction of the adjacent edge of two sub-pixels of arbitrary neighborhood is consistent.
Equal in length and its place rectilinear direction of the adjacent edge of two sub-pixels of arbitrary neighborhood is consistent, as shown in pixel cell in Fig. 4 40, the edge lengths that sub-pixel R is adjacent with sub-pixel G equates and its place straight line is parallel to each other, and sub-pixel B equates with sub-pixel R adjacent edge and its place straight line overlaps.
According to embodiments of the invention, as shown in Fig. 2 ~ Fig. 5, the size dimension of octagonal four groups of opposite side is respectively a1, a2, a3, a4, and its size range and correlation are: 10 μ m≤a1≤35 μ m; 10 μ m≤a2≤35 μ m; 5 μ m≤a3≤25 μ m; A3=a4; Be of a size of place, the limit straight line of a1 perpendicular to place, the limit straight line of the described a2 of being of a size of.
Vertical after the extended line on the limit that the extended line on the limit that size dimension is a1 is as shown in Figure 4 a2 with size dimension is crossing, to be respectively the extended line (in figure not shown in the dotted line of overstriking) of two groups of opposite side of a1 and a2 mutually vertical for size dimension.Size dimension is that the straight line at one group of opposite side place of a1 is parallel with line direction.
In the present invention, described line direction i.e. directions X shown in figure, and described column direction i.e. Y-direction shown in figure.
According to embodiments of the invention, as shown in Fig. 2 ~ Fig. 5, the distance of one group of opposite side that the length of side is a1 is b1, and the size range of b1 is 30 μ m≤b1≤60 μ m; The length of side is that the distance of one group of opposite side of a2 is b2, and the size range of b2 is 30 μ m≤b2≤60 μ m.
According to some embodiments of the present invention, as shown in Fig. 2 ~ Fig. 5, the first sub-pixel is blue subpixels (B), the second sub-pixel is that red sub-pixel (R), the 3rd sub-pixel are green sub-pixels (G), the quantity of blue subpixels is the twice of green sub-pixels or red sub-pixel quantity, blue subpixels, red sub-pixel, green sub-pixels position non-overlapping copies, the position of the position of the second sub-pixel and the 3rd sub-pixel can exchange.
According to some embodiments of the present invention, as shown in Fig. 2 ~ 5, blue subpixels is arranged in rectangular array mode with column direction in the row direction, and the distance between adjacent two row blue subpixels is L2, and the pass of a2 and L2 is: a2≤L2; Distance between adjacent two row blue subpixels is L1, and the pass of a1 and L1 is: a1≤L1.
As shown in Fig. 2 ~ Fig. 3, a2<L2, a1<L1.
As shown in Fig. 4 ~ Fig. 5, a2=L2, a1=L1.
According to some embodiments of the present invention, as shown in Figure 2, Figure 4 shows, red sub-pixel is arranged successively with column direction in the row direction, and adjacent two row red sub-pixel are dislocation arrangement in the row direction, and adjacent two row red sub-pixel are dislocation arrangement along column direction; Green sub-pixels is identical with the arrangement mode of red sub-pixel; Red sub-pixel and green sub-pixels are staggered with column direction in the row direction; In the row direction or on column direction, the spacing that red sub-pixel is adjacent between spacing and adjacent two blue subpixels between green sub-pixels equates.
Spacing in Fig. 2 and Fig. 4 between adjacent two blue subpixels is L1 on directions X, in the Y direction for L2, red sub-pixel be adjacent spacing between green sub-pixels on directions X for L1, be L2 in the Y direction.
Shown in figure 2, Fig. 4, in adjacent two odd-numbered lines or even number line, the line space of red sub-pixel or green sub-pixels is L3, and L2, b1, L3 three's pass is: L3=2L2+2b1; On adjacent two odd columns or even column, the column pitch of red sub-pixel or green sub-pixels is L4, and L1, b2, L4 three's pass is: L4=2L1+2b2.
According to some embodiments of the present invention, as shown in Fig. 3, Fig. 5, red sub-pixel, green sub-pixels are all arranged in rectangular array mode with column direction in the row direction, and the red sub-pixel of adjacent two row or the line space of green sub-pixels are the twice of the line space of the blue subpixels of adjacent two row, adjacent two red sub-pixel of row or the column pitch of green sub-pixels equate (being that the red sub-pixel of adjacent two row or the column pitch of green sub-pixels are L1) with the column pitch of the blue subpixels of adjacent two row.
Shown in figure 3, Fig. 5, the line space of adjacent two row red sub-pixel or green sub-pixels is L5, and L2, b1, L5 three's pass is: L5=2L2+2b1.
The enlarged diagram of tradition OLED display screen matrix structure as shown in Figure 1,11 is a pixel cell, in each pixel cell 11, comprise red (R), green (G), blue (B) three sub-pixels, the number that can find out three sub pixels each pixel cell 11 from structure shown in Fig. 1 is identical, the distance B 1=3H1+3H2 between adjacent two pixel cells.
In Fig. 4 and Fig. 5, D2 is adjacent two pixel cells along the center distance of directions X the center distance of adjacent two blue subpixels of directions X (along), D2<2b2 as shown in the figure.
If the dot structure in the dot structure in Fig. 1 and Fig. 4 has the sub-pixel of equal length size on directions X, i.e. b2=H1, D1=3H1+3H2 is greater than D2.
This shows that the OLED display screen with dot structure as shown in Fig. 2 ~ Fig. 5 has more pixel cell in unit sizes, its ppi will be higher than the OLED display screen of conventional pixel structure as shown in Figure 1; Simultaneously in traditional each pixel cell 11, only comprise a blue subpixels B, and in Fig. 2 ~ Fig. 5, each pixel cell 40 have two blue subpixels B, so thereby increased the life-span that the area of blue subpixels improves OLED display screen.
The invention also discloses a kind of matching mask plate for evaporation OLED display screen matrix, the supporting mask plate below in conjunction with accompanying drawing explanation for evaporation OLED display screen matrix described above.
As shown in Fig. 6 ~ Fig. 9; on mask plate 60, the shape in evaporation hole is consistent with the primitive shape of the above-mentioned OLED of institute display screen; for octagon, in Fig. 7, A1, A2, A3, A4 are respectively the size dimension of the four groups of opposite side in octagon evaporation hole, and its size range and correlation are: 10 μ m≤A1≤35 μ m; 10 μ m≤A2≤35 μ m; 5 μ m≤A3≤25 μ m; A3=A4; Be of a size of place, the limit straight line of A1 perpendicular to place, the limit straight line that is of a size of A2, be of a size of the extended line of one group of opposite side of A1 and form a rectangle after crossing between two with the extended line (extended line is as shown in the dotted line in Fig. 7) of one group of opposite side that is of a size of A1.
In Fig. 6,62 is virtual evaporation hole, and virtual evaporation hole is not real evaporation hole, the position in an evaporation hole of just setting, its shape and evaporation hole 61 just as, area is more than or equal to evaporation hole 61.Fig. 7 is the schematic diagram that mask plate structure shown in Fig. 6 further amplifies, and object is the structure in order to describe in more detail mask plate evaporation hole.
In Fig. 6 ~ Fig. 7, L6 is the column pitch in adjacent two row evaporation holes, and L7 is the line space in adjacent two row evaporation holes, and B1 is that the length of side is the distance of one group of opposite side of A1, and B2 is that the length of side is the distance of one group of opposite side of A2, wherein: A1≤L6, A2≤L7.
The pixel of the OLED display screen shown in Fig. 2 and Fig. 4 supports the use evaporation by the mask plate shown in the mask plate shown in Fig. 8 and Fig. 6 and forms, its blue subpixels (B) forms by mask plate evaporation shown in Fig. 6, and red sub-pixel (R) and green sub-pixels (G) form by the mask plate evaporation shown in Fig. 8.
In Fig. 8, L8 is the line space in adjacent two odd-numbered lines or adjacent two even number line evaporation holes on mask plate 60, and L9 is the column pitch in adjacent two odd columns or adjacent two even column evaporation holes on mask plate.Wherein B1, B2, L6, L7, L8 have following relation: L8=2L7+2B1; L9=2L6+2B2
The pixel of the OLED display screen shown in Fig. 3 and Fig. 5 supports the use evaporation by the mask plate shown in the mask plate shown in Fig. 9 and Fig. 6 and forms, blue subpixels (B) forms by mask plate evaporation shown in Fig. 6, and red sub-pixel (R) and green sub-pixels (G) form by the mask plate evaporation shown in Fig. 9.
In Fig. 9, L10 is the line space in the evaporation hole of adjacent two row, and wherein B1, B2, L10 have following relation: L10=2L7+2B1.
 
By the dot structure of a kind of OLED display screen provided by the present invention, can increase the area of blue subpixels (B) in the each pixel cell of OLED, the ppi of raising display, thereby make accordingly the life-span increase of blue subpixels, the display quality of OLED display screen improve.
Although the specific embodiment of the present invention is described in detail with reference to multiple illustrative examples of the present invention, but it must be understood that, those skilled in the art can design multiple other improvement and embodiment, and these improve and within embodiment will drop on spirit and scope.Particularly, within the scope of aforementioned open, accompanying drawing and claim, can aspect the layout of parts and/or subordinate composite configuration, make rational modification and improvement, and can not depart from spirit of the present invention.Except modification and the improvement of parts and/or layout aspect, its scope is limited by claims and equivalent thereof.

Claims (9)

1. the dot structure of an OLED display screen, described dot structure comprises the pixel cell of arranging by default rule being arranged on described OLED display screen, described pixel cell comprises the first sub-pixel, the second sub-pixel, the 3rd sub-pixel three sub pixels, it is characterized in that: described the first sub-pixel, the second sub-pixel, the 3rd sub-pixel be shaped as octagon, described octagon has four groups of parallel opposite side, and equal in length and its place rectilinear direction of the adjacent edge of two described sub-pixels of arbitrary neighborhood is consistent.
2. the dot structure of OLED display screen according to claim 1, is characterized in that, the size dimension of described octagonal four groups of opposite side is respectively a1, a2, a3, a4, and its size range and correlation are: 10 μ m≤a1≤35 μ m; 10 μ m≤a2≤35 μ m; 5 μ m≤a3≤25 μ m; A3=a4; Place, the limit straight line of the described a1 of being of a size of is perpendicular to described place, the limit straight line that is of a size of a2.
3. the dot structure of OLED display screen according to claim 2, is characterized in that, the distance of one group of opposite side that the described length of side is a1 is b1, and the size range of described b1 is 30 μ m≤b1≤60 μ m; The described length of side is that the distance of one group of opposite side of a2 is b2, and the size range of described b2 is 30 μ m≤b2≤60 μ m.
4. according to the dot structure of the OLED display screen described in claim 1 ~ 3 any one claim, it is characterized in that, described the first sub-pixel is blue subpixels, described the second sub-pixel is that red sub-pixel, described the 3rd sub-pixel are green sub-pixels, the quantity of described blue subpixels is the twice of green sub-pixels or red sub-pixel quantity, described blue subpixels, described red sub-pixel, described green sub-pixels position non-overlapping copies, the position of the position of described the second sub-pixel and described the 3rd sub-pixel can exchange.
5. the dot structure of OLED display screen according to claim 4, it is characterized in that, described blue subpixels is arranged in rectangular array mode with column direction in the row direction, and the distance described in adjacent two row between blue subpixels is L2, and the pass of described a2 and described L2 is: a2≤L2; Distance between the described blue subpixels of adjacent two row is L1, and the pass of described a1 and described L1 is: a1≤L1.
6. the dot structure of OLED display screen according to claim 5, it is characterized in that, described red sub-pixel is arranged successively with column direction in the row direction, and described in adjacent two row, red sub-pixel is dislocation arrangement in the row direction, and the described red sub-pixel of adjacent two row is dislocation arrangement along column direction; Described green sub-pixels is identical with the arrangement mode of described red sub-pixel; Described red sub-pixel and described green sub-pixels are staggered with column direction in the row direction; In the row direction or on column direction, described red sub-pixel is adjacent the spacing between blue subpixels described in the spacing and adjacent two between described green sub-pixels and equates.
7. the dot structure of OLED display screen according to claim 6, it is characterized in that, the line space of adjacent two odd-numbered lines or the above red sub-pixel of even number line or green sub-pixels is L3, and described L2, described b1, described L3 three's pass is: L3=2L2+2b1; The column pitch of adjacent two odd columns or the above red sub-pixel of even column or green sub-pixels is L4, and described L1, described b2, described L4 three's pass is: L4=2L1+2b2.
8. the dot structure of OLED display screen according to claim 5, it is characterized in that, described red sub-pixel, described green sub-pixels are all arranged in rectangular array mode with column direction in the row direction, and the described red sub-pixel of adjacent two row or the line space of green sub-pixels are the twice of the line space of the described blue subpixels of adjacent two row, the adjacent two described red sub-pixel of row or the column pitch of green sub-pixels equate with the column pitch of the described blue subpixels of adjacent two row.
9. the dot structure of OLED display screen according to claim 7, is characterized in that, the line space of red sub-pixel or green sub-pixels is L5 described in adjacent two row, and described L2, described b1, described L5 three's pass is: L5=2L2+2b1.
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Application publication date: 20140702