CN104576696A - Pixel structure and organic light emitting display adopting same - Google Patents
Pixel structure and organic light emitting display adopting same Download PDFInfo
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- CN104576696A CN104576696A CN201410800715.5A CN201410800715A CN104576696A CN 104576696 A CN104576696 A CN 104576696A CN 201410800715 A CN201410800715 A CN 201410800715A CN 104576696 A CN104576696 A CN 104576696A
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Abstract
The invention discloses a pixel structure and an organic light emitting display adopting the same. The pixel structure comprises a plurality of pixel units, wherein each pixel unit takes a rhombus structure formed by an upper half part and a lower half part; the adjacent pixel units are arranged in a staggered manner; each pixel unit comprises a plurality of sub pixels; a first sub pixel forms one of the upper half part and the lower half part of the rhombus pixel unit; a second sub pixel and a third sub pixel are arranged side by side to form the other of the upper half part and the lower half part of the rhombus pixel unit together; pixels in the same color of the pixel units in the adjacent rows are arranged adjacently. By integrating the same sub pixels together, the width of the corresponding vapor deposition Mask hole diameter can be enlarged, the difficulty of the Mask technology can be reduced, and the display PPI (Pixel Per Inch) can be improved; meanwhile, because of the staggered arrangement manner of the pixel units in the adjacent rows, the adjacent edges of the second sub pixel and the third sub pixel with the first sub pixel can be longer, main light emitting of the pixel units can be relatively concentrated, and the light mixing effect is good.
Description
Technical field
The present invention relates to organic light emitting display technical field, specifically, is a kind of dot structure and the organic light emitting display adopting this dot structure.
Background technology
OLED(Organic Light-Emitting Diode, Organic Light Emitting Diode) be active illuminating device.With traditional LCD(Liquid Crystal Display, liquid crystal display) display mode compares, and OLED Display Technique, without the need to backlight, has self luminous characteristic.OLED adopts very thin organic material rete and glass substrate, when have electric current by time, organic material will be luminous.Therefore OLED display screen significantly can save electric energy, can do lighter and thinner, tolerate the variations in temperature of more wide region, and visible angle is larger than LCD display.OLED display is expected to the flat panel display of future generation become after LCD, is one of the maximum technology that receives publicity in current flat panel display.
The colorize method of OLED screen body has many kinds, now comparatively ripe and OLED colorize technology that is successful volume production is OLED evaporation coating technique, and it adopts traditional RGB Stripe(RGB strip) arrangement mode carries out evaporation.Wherein picture effect is it is preferred that side-by-side(juxtaposition) mode.Side-by-side mode has red, green, blue (R, G, B) three sub-pixels (sub-pixel) in pixel (Pixel) scope, each sub-pixel is all in quadrangle, and there are independently organic light emission components and parts separately, it utilizes evaporation film-forming technology through fine metal mask plate (Fine Metal Mask, FMM) at array(array) corresponding location of pixels forms organic emitting components on substrate.Making high PPI(Pixel Per Inch, dpi (dots per inch)) technology of OLED screen body focuses on fine metal mask plate that is meticulous and good mechanical stability, and the key of fine metal mask plate is the arrangement mode of pixel and sub-pixel.
Current industry is the arrangement mode such as seamed (slit), groove (slot), Pentile and IGNIS, but because mask plate (Mask) aperture area has specification lower limit, and in order to avoid manufacturing process is by the impact of tolerance (tolerance), need preset clearance (gap) between the opening of neighbor and cause picture element density, as PPI cannot be increased dramatically, and pixel arrangement is not the reasons such as true colour display screen on true meaning shows, the problem making above scheme well can't solve picture element density to promote.
Traditional pixel arrangement mode, each pixel respectively by R, G, B tri-colour cell become.Pixel arrangement mode as shown in Figure 1, is divided into R, G, B tri-sub-pixels be parallel to each other in a pixel, and each sub-pixel, all in quadrangle, regulates the size of the corresponding quadrangle of R, G, B sub-pixel according to the difference of corresponding RGB device performance.As shown in Figure 1, pixel region 100 comprises R subpixel area 101, R luminous zone 102, G subpixel area 103, G luminous zone 104, B subpixel area 105 and B luminous zone 106, the region of the sub-pixel of R, G, B shown in figure is equal respectively with luminous zone area, and during enforcement, area can adjust as required.
Fig. 2 and Fig. 3 is respectively two kinds of evaporation Mask corresponding to Fig. 1.Wherein, the first blocked area, blocked area 107, second 109 in Fig. 2, Fig. 3 is Mask blocked area, and evaporation district first opening 108 and the second opening 110 can be seam (slit) or grooves (slot) two kinds.
Fig. 2 is slit formula evaporation Mask, and its corresponding metal mask plate openings of sizes is corresponding with the size of sub-pixel.The opening mode main feature of this metal mask plate shares same opening at all sub-pixels shielding same row in body, metal mask plate opening is longer in the longitudinal direction, along with the increase of screen size, the Opening length of metal mask plate also needs to increase thereupon, and the non-opening portion between adjacent apertures forms metal strip (stripe).
Slit opening mode is for the OLED screen body of low PPI, and on metal mask plate, the spacing of adjacent apertures is comparatively large, and metal strip is wider, and making and the use management of metal mask plate are easier to.But this kind of opening mode is when the OLED screen body application of high PPI, the pitch smaller of adjacent apertures on fine metal mask plate, metal strip is thinner, metal mask plate in use metal strip is easily out of shape by the impact in magnet plate magnetic line of force direction, cause different colours material between sub-pixel mutually to pollute and colour mixture, the production yield of product is lower.In addition, this kind of metal mask plate yet easy impaired distortion in use, cleaning and management process, recycling rate of waterused is not high, because the cost of metal mask plate is high, the screen body cost made in this way is also higher.
Fig. 3 is slot formula evaporation Mask, the opening mode main feature of this kind of metal mask plate is that the position be positioned between pixel adds bridge(connecting bridge in slit opening), connect adjacent metal strip, original rectangular opening is changed over multiple open cells.The method makes the metal strip of metal mask plate comparatively firm, solves above-mentioned slit opening mode metal strip easily by the problem that the magnetic line of force and external force affect and be out of shape.But in the long dimensional accuracy of consideration metal mask plate, in order to avoid during evaporation, capture-effect is produced to sub-pixel, between sub-pixel and bridge, enough distances must be kept, the upper and lower length reduction of sub-pixel, and have impact on the aperture opening ratio of each sub-pixel.
In above-mentioned each mode, each opening on Mask can only the sub-pixel of corresponding one or one same color, and its arrangement density can not improve, and thus resolution just cannot improve.And be subject to the impact of Mask technological level, opening on this Mask can not be too small, because evaporation can produce " shadow effect ", reserved certain surplus is also needed between two luminous zones, prevent from producing colour mixture because of " shadow effect ", therefore Mask opening can not do very little, otherwise also can have influence on aperture opening ratio.
Her lattice Nice of Canada IGNIS() company applies at it is in the Chinese invention patent application of CN102714213A at publication number, proposes a kind of new pixel architecture.Its adjacent pixel cell does mirror-image arrangement, make 4 R sub-pixels, 4 G sub-pixels are stitched together respectively, Slot mode can be adopted to carry out evaporation, B sub-pixel forms line arrangement, Slit mode can be adopted to carry out evaporation, such arrangement can make the aperture of evaporation Mask increase to 2 times, reduce Mask technology difficulty, improve display physical resolution (PPI), but this arrangement makes the spacing between repetition display unit (4 R sub-pixel/4 G sub-pixel/two row B sub-pixels) increase, there will be the bad display effect such as granular sensation and striped sense.
Summary of the invention
The technical problem to be solved in the present invention is to provide one can effectively improve OLED display resolution, and manufacturing cost, raising product yield can be reduced, and granular sensation and the striped sense of display frame can be improved, make the dot structure of display effect exquisiteness, and adopt the organic light emitting display of this dot structure.
In order to solve the problems of the technologies described above, the invention provides a kind of dot structure, include multiple pixel cell, each pixel cell forms rhombus by upper and lower two half-unit, is staggered between adjacent pixel cell; Each described pixel cell comprises first area, second area and the 3rd region, wherein, described first area forms one of them part of upper and lower half of the pixel cell of rhombus, and described second area and the 3rd region form upper and lower half another part wherein of the pixel cell of rhombus side by side jointly; Each described pixel cell comprises multiple sub-pixel, and described multiple sub-pixel correspondence is distributed in the first area of described pixel cell, second area and the 3rd region, and the same color sub-pixels of adjacent pixel unit is disposed adjacent.
Further, described pixel cell comprises the first sub-pixel, the second sub-pixel and the 3rd sub-pixel, described first sub-pixel, the second sub-pixel and the 3rd sub-pixel respectively corresponding be formed at described pixel cell first area, second area and the 3rd region.
Further, described first sub-pixel is isosceles triangle, described second sub-pixel and the 3rd sub-pixel rectangular triangle respectively, and described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
Further, described each pixel cell is the square of inclination 45 degree, and described first sub-pixel, the second sub-pixel and the 3rd sub-pixel are respectively in isosceles right triangle, and described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
Further, described first sub-pixel is blue subpixels, and the second sub-pixel and the 3rd sub-pixel are respectively red sub-pixel and green sub-pixels.
Further, described pixel cell comprises the first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel, the first area of described pixel cell comprises Part I and Part II, first sub-pixel of described pixel cell and the 4th sub-pixel are formed at Part I and the Part II of described first area respectively, and the second sub-pixel of described pixel cell and the 3rd sub-pixel be corresponding second area and the 3rd region being formed at described pixel cell respectively.
Further, described first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel be rectangular triangle respectively, and described first sub-pixel and the 4th sub-pixel level are symmetrical arranged, and described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
Further, described each pixel cell is the square of inclination 45 degree, described first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel are respectively in isosceles right triangle, and described first sub-pixel and the 4th sub-pixel level are symmetrical arranged, described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
Further, described first sub-pixel is blue subpixels, and the second sub-pixel is red sub-pixel, and the 3rd sub-pixel is green sub-pixels, and the 4th sub-pixel is white sub-pixels.
Present invention also offers a kind of organic light emitting display including above-mentioned dot structure.
The present invention is by arranging the pixel cell of rhombus, each sub-pixel respectively corresponding be formed at described pixel cell first area, in second area and the 3rd region, and the same color sub-pixels of adjacent pixel unit is disposed adjacent, sub-pixel by same color combines, so, the width in corresponding evaporation Mask aperture can be increased, reduce Mask technology difficulty, improve display PPI.Meanwhile, due to the staggered pattern of adjacent lines pixel cell, make the second sub-pixel in the present invention, adjacent side between the 3rd sub-pixel and the first sub-pixel longer, the main luminescence of pixel cell is more concentrated, and light mixing effect is good.The present invention, while raising display resolution, can also improve granular sensation and the striped sense of display frame, make display effect more fine and smooth.
Accompanying drawing explanation
Fig. 1 is the pixel arrangement schematic diagram of conventional organic luminescence display.
Fig. 2 is a kind of Mask opening schematic diagram of corresponding diagram 1.
Fig. 3 is the another kind of Mask opening schematic diagram of corresponding diagram 1.
Fig. 4 is the structural representation of dot structure first embodiment of the present invention.
The Slit formula Mash that Fig. 5 uses when being and making dot structure embodiment illustrated in fig. 1.
The Slot formula Mash that Fig. 6 uses when being and making dot structure embodiment illustrated in fig. 1.
Fig. 7 is the structural representation of dot structure second embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, and to make those skilled in the art the present invention may be better understood and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in Figure 4, for dot structure of the present invention includes multiple pixel cell 400, each pixel cell 400 forms rhombus by upper and lower two half-unit, is staggered between the pixel cell 400 of adjacent lines; Each pixel cell 400 comprises multiple region, wherein first area form the pixel cell 400 of rhombus upper and lower half one of them, second area and the 3rd region side by side, common form another of the upper and lower half of the pixel cell 400 of rhombus; Each pixel cell 400 comprises multiple sub-pixel, and multiple sub-pixel correspondences of pixel cell 400 are distributed in multiple regions of pixel cell 400, and the same color sub-pixels of the pixel cell 400 of adjacent lines is disposed adjacent.
As shown in Figure 4, be the first embodiment of dot structure of the present invention.In the present embodiment, pixel cell 400 comprises the first sub-pixel 401, second sub-pixel 402 and the 3rd sub-pixel 403, first sub-pixel 401, second sub-pixel 402 and the 3rd sub-pixel 403 correspondence are distributed in the first area of pixel cell 400, second area and the 3rd region, namely the first sub-pixel 401 is distributed in first area, second sub-pixel 402 is distributed in second area, and the 3rd sub-pixel 403 is distributed in the 3rd region.
Wherein, in odd-numbered line, first sub-pixel 401 is in isosceles triangle, form the first half of pixel cell 400, second sub-pixel 402 and the 3rd sub-pixel 403 rectangular triangle respectively, is positioned at the below of the first sub-pixel 401, and the second sub-pixel 402 and the 3rd sub-pixel 403 horizontal symmetrical are arranged, second sub-pixel 402 is positioned at left side, and the 3rd sub-pixel 403 is positioned at right side.In even number line, first sub-pixel 401 is in isosceles triangle, form the latter half of pixel cell 400, second sub-pixel 402 and the 3rd sub-pixel 403 rectangular triangle respectively, be positioned at the top of the first sub-pixel 401, second sub-pixel 402 and the 3rd sub-pixel 403 horizontal symmetrical are arranged, and the 3rd sub-pixel 403 is positioned at left side, and the second sub-pixel 402 is positioned at right side.Thus, make the first sub-pixel 401 of even number line adjacent with the first sub-pixel 401 of adjacent odd-numbered line, thus a Mask opening evaporation can be shared.First sub-pixel 401 entirety of adjacent lines forms strip, therefore can use Slit formula Mask evaporation as shown in Figure 5.And the second sub-pixel 402 of odd-numbered line is adjacent with the second sub-pixel 402 of adjacent even number line, and the 3rd sub-pixel 403 of odd-numbered line is adjacent with the 3rd sub-pixel 403 of adjacent even number line, thus make the second sub-pixel 402 of adjacent lines and the 3rd sub-pixel 403 can share a MASK opening evaporation respectively.Second sub-pixel 402 of adjacent lines and the 3rd sub-pixel 403 entirety form rhombus, can use Slot formula Mask evaporation as shown in Figure 6.
Preferably, the square of each pixel cell 400 in inclination 45 degree.Square, as a special case of rhombus, makes pixel cell structure of the present invention more regular, has more regularity.Correspondingly, the first sub-pixel 401, second sub-pixel 402 and the 3rd sub-pixel 403 are respectively in isosceles right triangle, and the second sub-pixel 402 and the 3rd sub-pixel 403 horizontal symmetrical are arranged.Based on this kind of structure, the second sub-pixel 402 of adjacent lines and the 3rd sub-pixel 403 entirety form square, then the opening of Slot formula Mask is also in square, thus can maximally utilise the opening of Mask, obtains the dot structure of large as far as possible resolution.
In the above-described embodiments, the first sub-pixel 401 is blue subpixels, and the second sub-pixel 402 and the 3rd sub-pixel 403 are respectively red sub-pixel and green sub-pixels.Visible, the area of blue subpixels is the twice of red sub-pixel or green sub-pixels area.Because the life-span of blue subpixels luminescent material is less than the luminescent material of red sub-pixel or green sub-pixels in prior art, can compensate by increasing the area of blue subpixels the colour cast that the life-span because of blue subpixels luminescent material causes.Certainly, the present invention is not limited thereto, the sub-pixel relative position of each color can be exchanged arbitrarily as required.In addition, in the present invention, the color of each sub-pixel is also not limited to blueness, redness and green, also can be other color as required.
As the another kind of execution mode of dot structure of the present invention, can increase by the 4th sub-pixel in pixel cell 400.Area by the first sub-pixel 401 in embodiment illustrated in fig. 4 reduces half, and the region that will free out forms the 4th sub-pixel.
As shown in Figure 7, be the second embodiment of dot structure of the present invention.In the present embodiment, pixel cell 700 comprises the first sub-pixel 701, second sub-pixel 702, the 3rd sub-pixel 703 and the 4th sub-pixel 704, the first area of pixel cell 700 comprises Part I and Part II, first sub-pixel 701 of pixel cell 700 and the 4th sub-pixel 704 are formed at Part I and the Part II of first area respectively, and the second sub-pixel 702 of pixel cell 700 and the 3rd sub-pixel 703 be corresponding second area and the 3rd region being formed at pixel cell 700 respectively.
Wherein, in odd-numbered line, the first sub-pixel 701 and the 4th sub-pixel 704 rectangular triangle respectively, the first half of common formation pixel cell 700, first sub-pixel 701 and the 4th sub-pixel 704 horizontal symmetrical are arranged, and the first sub-pixel 701 is positioned at left side, and the 4th sub-pixel 704 is positioned at right side; Second sub-pixel 702 and the 3rd sub-pixel 703 rectangular triangle respectively, lay respectively at the below of the first sub-pixel 701 and the 4th sub-pixel 704, second sub-pixel 702 and the 3rd sub-pixel 703 horizontal symmetrical are arranged, and the second sub-pixel 702 is positioned at left side, and the 3rd sub-pixel 703 is positioned at right side.In even number line, first sub-pixel 701 and the 4th sub-pixel 704 rectangular triangle respectively, common the latter half forming pixel cell 700, the first sub-pixel 701 and the 4th sub-pixel 704 horizontal symmetrical are arranged, first sub-pixel 701 is positioned at right side, and the 4th sub-pixel 704 is positioned at left side; Second sub-pixel 702 and the 3rd sub-pixel 703 rectangular triangle respectively, lay respectively at the top of the first sub-pixel 701 and the 4th sub-pixel 704, second sub-pixel 702 and the 3rd sub-pixel 703 horizontal symmetrical are arranged, and the 3rd sub-pixel 703 is positioned at left side, and the second sub-pixel 702 is positioned at right side.Thus, the same color sub-pixels of adjacent lines is arranged together, thus can share a Mask opening evaporation.The same color sub-pixels entirety of adjacent lines forms rhombus, can use Slot formula Mask evaporation as shown in Figure 6.
Preferably, the square of each pixel cell 700 in inclination 45 degree, thus make described first sub-pixel 701, second sub-pixel 702, the 3rd sub-pixel 703 and the 4th sub-pixel 704 respectively in isosceles right triangle, and described first sub-pixel 701 and the 4th sub-pixel 704 horizontal symmetrical are arranged, described second sub-pixel 702 and the 3rd sub-pixel 703 horizontal symmetrical are arranged.
In the present embodiment, the first sub-pixel 701 is blue subpixels, and the second sub-pixel 702 is red sub-pixel, and the 3rd sub-pixel 703 is green sub-pixels, and the 4th sub-pixel 704 is white sub-pixels.Embodiment adds white light pixel, thus make the present invention more accurate when display white, and the contrast of the display be made up of dot structure of the present invention can be improved.
The present invention, by being combined by identical sub-pixel, can increase the width in corresponding evaporation Mask aperture, reduces Mask technology difficulty, improves display PPI.Meanwhile, due to the staggered pattern of adjacent lines pixel cell 700, in the present invention, the adjacent side of G sub-pixel, R sub-pixel and B sub-pixel is longer, and the main luminescence of pixel cell 700 is more concentrated, and light mixing effect is good.
Dot structure of the present invention has larger improvement in display granular sensation and striped, for sprite, publication number is in the Chinese invention patent application of CN102714213A, picture four identical sub-pixels of R sub-pixel and G sub-pixel are as a repetition display unit, be 1 pixel cell width with the spacing of adjacent display cell, B sub-pixel is striped display, and adjacent stripes spacing is 1 pixel cell width.The present invention is when equal area pixel cell, spacing between adjacent display repetitive is about 0.7 pixel cell width, repetition display unit in identical display area is more, the dense degree repeating display unit can improve about 40%, and granular sensation and the striped sense of obvious display frame can be improved preferably.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. a dot structure, includes multiple pixel cell, it is characterized in that, each pixel cell forms rhombus by upper and lower two half-unit, is staggered between adjacent pixel cell; Each described pixel cell comprises first area, second area and the 3rd region, wherein, described first area forms one of them part of upper and lower half of the pixel cell of rhombus, and described second area and the 3rd region form upper and lower half another part wherein of the pixel cell of rhombus side by side jointly; Each described pixel cell comprises multiple sub-pixel, and described multiple sub-pixel correspondence is distributed in the first area of described pixel cell, second area and the 3rd region, and the same color sub-pixels of adjacent pixel unit is disposed adjacent.
2. dot structure according to claim 1, it is characterized in that, described pixel cell comprises the first sub-pixel, the second sub-pixel and the 3rd sub-pixel, described first sub-pixel, the second sub-pixel and the 3rd sub-pixel respectively corresponding be formed at described pixel cell first area, second area and the 3rd region.
3. dot structure according to claim 2, is characterized in that, described first sub-pixel is isosceles triangle, described second sub-pixel and the 3rd sub-pixel rectangular triangle respectively, and described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
4. dot structure according to claim 2, it is characterized in that, described each pixel cell is the square of inclination 45 degree, and described first sub-pixel, the second sub-pixel and the 3rd sub-pixel are respectively in isosceles right triangle, and described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
5. according to the dot structure in claim 2-4 described in any one, it is characterized in that, described first sub-pixel is blue subpixels, and the second sub-pixel and the 3rd sub-pixel are respectively red sub-pixel and green sub-pixels.
6. dot structure according to claim 1, it is characterized in that, described pixel cell comprises the first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel, the first area of described pixel cell comprises Part I and Part II, first sub-pixel of described pixel cell and the 4th sub-pixel are formed at Part I and the Part II of described first area respectively, and the second sub-pixel of described pixel cell and the 3rd sub-pixel be corresponding second area and the 3rd region being formed at described pixel cell respectively.
7. dot structure according to claim 6, it is characterized in that, described first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel be rectangular triangle respectively, and described first sub-pixel and the 4th sub-pixel level are symmetrical arranged, described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
8. dot structure according to claim 6, it is characterized in that, described each pixel cell is the square of inclination 45 degree, described first sub-pixel, the second sub-pixel, the 3rd sub-pixel and the 4th sub-pixel are respectively in isosceles right triangle, and described first sub-pixel and the 4th sub-pixel level are symmetrical arranged, described second sub-pixel and the 3rd sub-pixel level are symmetrical arranged.
9. according to the dot structure in claim 6-8 described in any one, it is characterized in that, described first sub-pixel is blue subpixels, and the second sub-pixel is red sub-pixel, and the 3rd sub-pixel is green sub-pixels, and the 4th sub-pixel is white sub-pixels.
10. one kind includes the organic light emitting display of dot structure described in any one in claim 1-9.
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