CN101752407A - OLED display, mask and mask alignment method thereof - Google Patents
OLED display, mask and mask alignment method thereof Download PDFInfo
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- CN101752407A CN101752407A CN200910265058A CN200910265058A CN101752407A CN 101752407 A CN101752407 A CN 101752407A CN 200910265058 A CN200910265058 A CN 200910265058A CN 200910265058 A CN200910265058 A CN 200910265058A CN 101752407 A CN101752407 A CN 101752407A
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Abstract
The invention relates to an OLED display, which is formed by a plurality of line and rows of luminous pixel units. Each group of luminous pixel units comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit. The OLED display is characterized in that the same color sub-pixel units of three adjacent rows of luminous pixel units are sequentially arranged in a staggering way. By adopting the structure, the invention has the advantages that since the mask corresponding to the OLED display changes the evaporated mask design structure of the bar grating opening R/G/B sub-pixel units formed by the traditional long strip notches, the evaporated mask design structure of staggered point opening R/G/B sub-pixel units is adopted and the characteristics that the long side distance V of the R/G/B sub-pixel units is larger than the short side distance H of the R/G/B sub-pixel units is utilized, the requirements on the precision of the mask alignment are reduced; and since the mechanical strength of the mask of the structure is high, the required thickness of the mask is correspondingly reduced and the 'shadow' situation during evaporation of the mask is reduced.
Description
Technical field
The invention belongs to Display Technique field, plane, relate in particular to a kind of OLED display and be exclusively used in the mask plate of this display and mask plate to method for position.
Background technology
OLED, i.e. Organic Light Emitting Diode (Organic Light-Emitting Diode), be called again organic electric laser show (Organic Electroluminesence Display, OELD).The OLED Display Technique is different with traditional LCD display mode, need not backlight, adopts extremely thin coating of organic material and glass-base, and when electric current passed through, these organic materials will be luminous.And the OLED display screen can do lighter and thinnerly, and visible angle is bigger, and can significantly save electric energy.OLED is combined according to matrix structure by the individual light-emitting pixels of N * M (N and M are natural number) unit, comprises red subpixel unit, green subpixel unit and blue subpixel unit again for each light-emitting pixels unit of color OLED.OLED is divided into active driving (active driving) OLED (AMOLED) and passive type driving (passive drive) OLED (PMOLED) according to type of drive.
Each subpixel unit of PMOLED comprises the luminous organic material layer, N * M light-emitting pixels unit is according to matrix structure, to N column electrode and M row electrode should be arranged, row and column is two electrodes of corresponding light emitting pixel respectively, be negative electrode and anode, utilize the cross-inductive of column electrode and row electrode to control the luminance of each light-emitting pixels unit.As shown in Figure 1, for having the PMOLED of 6 capable * 2 light-emitting pixels unit that are listed as, as seen from the figure, each light-emitting pixels unit 1 in the basic unit 9 by red (R) subpixel unit 11, green (G) subpixel unit 12 and blue (B) subpixel unit 13 respectively one form, each subpixel unit comprises organic luminous material layer 15 again, in the above-mentioned arrangement architecture, the color of every row subpixel unit is identical.
Each subpixel unit of AMOLED comprises low-temperature polysilicon film transistor (the LTP-Si TFT with switching function, LowTemperature Poly-Si Thin Film Transistor) and the luminous organic material layer, and each pixel is equipped with a charge storage capacitance, peripheral drive circuit and array of display whole system are integrated on the same glass substrate, and the luminous organic material layer is by the thin-film transistor control luminance of each light-emitting pixels unit self.As shown in Figure 2, for having the AMOLED of 6 capable * 2 light-emitting pixels unit that are listed as, as seen from the figure, each light-emitting pixels unit 1 in the basic unit 9 is made up of red (R) subpixel unit 11, green (G) subpixel unit 12 and each one of blue (B) subpixel unit, each subpixel unit comprises thin-film transistor 14 and luminous organic material layer 15 again, each subpixel unit keeps apart by cathode insulated column 16, and in the above-mentioned arrangement architecture, the color of every row subpixel unit is identical.
No matter be AMOLED and PMOLED, its machine luminous material layer 15 generally all forms by organic material being carried out vacuum vapor plating, in order on glass substrate, to form the various details of display screen, the general mask plate of metal material that adopts is controlled the plated film position of organic material in basic unit 9, because needing the R/G/B sub-pixel unit to show respectively, OLED could ideally show real image, and the R/G/B sub-pixel unit all is different luminous organic material, so need to adopt the mask plate of metal material to come R/G/B sub-pixel unit difference evaporation organic material.In the prior art, the size of the subpixel unit of AMOLED and PMOLED is all very little, its long back gauge V (vertically) is of a size of about 150 μ m, minor face distance H (laterally) is about 50 μ m, spacing between the adjacent subpixel unit is 10-20 μ m, and the spacing between the adjacent light-emitting pixels unit is 10-20 μ m.The area of the luminous organic material layer of the pixel unit of AMOLED is less than PMOLED, thereby the aperture opening ratio of AMOLED is also less than PMOLED.Quite difficult in the evaporation position of control organic material in basic unit 9 under this miniature scale, if going wrong, the pixel contraposition between the R/G/B sub-pixel unit can directly produce adverse influence to image.
Mask plate of the prior art as shown in Figure 3, mask plate comprises mask plate substrate 2, the strip breach 21 that forms on mask plate substrate 2, strip breach 21 run through and cover the homochromy subpixel of row unit.Because strip breach 21 is too long and narrow, mask plate is being installed and behind the stressed F of cubic tensioning, mask plate is yielding, be not easy control, in order to prevent the mask plate distortion, just need to guarantee its mechanical strength, this just need make mask plate keep enough thickness, thereby the R/G/B sub-pixel unit can be because there be " shade " phenomenon in the thickness effect of mask plate in evaporation luminous organic material process, the edge evaporation thickness that is each sub-pixel unit can be starkly lower than the middle evaporation thickness of sub-pixel, thereby influences display effect.
According to existing OLED display and mask plate thereof, the mask plate of prior art to method for position is: make the strip breach of mask plate and a kind of homochromy subpixel unit (being same listing) contraposition good and carry out the evaporation of luminous organic material, move the minor face of a sub-pixel unit to adjacent column apart from the evaporation of V up to the luminous organic material of finishing three kinds of color subpixel unit along contraposition direction D successively then.Because minor face is far smaller than long back gauge H apart from V, thus prior art to method for position required precision height, the contraposition difficulty is big.
Summary of the invention
The objective of the invention is that the aligning accuracy of mask plate requires and provides a kind of OLED display and mask plate and mask plate thereof to method for position when reducing the organic luminous layer evaporation of OLED.
To achieve these goals, the technical solution adopted in the present invention is: a kind of OLED display, light-emitting pixels unit by multiple row and multirow is formed, every group of light-emitting pixels unit comprises a red subpixel unit, green subpixel unit and blue subpixel unit, it is characterized in that the homochromy subpixel unit of the light-emitting pixels unit of adjacent triplex row is staggered successively.
To achieve these goals, a kind of mask plate of OLED display also is provided, described mask plate comprises the rectangular opening on substrate and the substrate, the opening size of described rectangular opening is greater than the subpixel unit, described rectangular opening arrangement mode is identical with the arrangement mode of wherein a kind of homochromy subpixel unit of light-emitting pixels unit, and the rectangular opening of adjacent triplex row is staggered successively.
To achieve these goals, the mask plate that a kind of OLED display also is provided is characterized in that method for position, comprises step:
S1. make wherein a kind of homochromy subpixel unit contraposition of the rectangular opening of mask plate and OLED display good and carry out the evaporation of luminous organic material;
S2. after finishing the evaporation of luminous organic material of above-mentioned homochromy subpixel unit, make mask plate move the long back gauge of a sub-pixel unit and carry out the evaporation of second kind of luminous organic material to adjacent lines relative to the OLED display;
S3. after finishing the evaporation of luminous organic material of above-mentioned two kinds of homochromy subpixel unit, make mask plate move the long back gauge of a sub-pixel unit and carry out the evaporation of the third luminous organic material to adjacent lines along same direction again, up to the evaporation of the luminous organic material of finishing three kinds of color subpixel unit relative to the OLED display.
The invention has the beneficial effects as follows: the OLED display that adopts said structure, its corresponding mask plate has changed the mask plate project organization of the R/G/B subpixel unit evaporation of traditional formed palisade opening of strip breach, and adopt dislocation point-like rectangular opening opening R/G/B subpixel unit deposition mask plate project organization, utilize the characteristics of the long back gauge V of R/G/B sub-pixel unit, reduced the aligning accuracy requirement of mask plate greater than the minor face distance H.Because the mask plate mechanical strength of said structure is bigger, has just reduced the thickness requirement of mask plate accordingly, thereby also reduced " shade " phenomenon in the mask plate evaporate process.
Description of drawings
Accompanying drawing 1 is the pixel unit arrangement architecture schematic diagram of PMOLED display in the prior art.
Accompanying drawing 2 is pixel unit arrangement architecture schematic diagrames of AMOLED display in the prior art.
Accompanying drawing 3 is plane structure charts of the mask plate of prior art.
Accompanying drawing 4 is pixel unit arrangement architecture schematic diagrames of the embodiment of the invention 1.
Accompanying drawing 5 is pixel unit arrangement architecture schematic diagrames of the embodiment of the invention 2.
Accompanying drawing 6 is plane structure charts of mask plate of the present invention.
Description of reference numerals: light-emitting pixels unit 1, red subpixel unit 11, green subpixel unit 12, blue subpixel unit 13, transistor 14, luminous organic material layer 15, cathode insulated column 16, mask plate substrate 2, strip breach 21, rectangular opening 22, basic unit 9.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1: as shown in Figure 4, each subpixel unit of PMOLED comprises the luminous organic material layer, (N is 6 to N * M in the present embodiment, M is 2) individual light-emitting pixels unit is according to matrix structure, to N column electrode and M row electrode should be arranged, row and column is two electrodes of corresponding light emitting pixel respectively, i.e. negative electrode and anode utilize the cross-inductive of column electrode and row electrode to control the luminance of each light-emitting pixels unit.Each light-emitting pixels unit 1 in the basic unit 9 of PMOLED by red (R) subpixel unit 11, green (G) subpixel unit 12 and blue (B) subpixel unit 13 respectively one form, each subpixel unit comprises organic luminous material layer 15 again, and each subpixel unit keeps apart by cathode insulated column 16.In the above-mentioned arrangement architecture, the homochromy subpixel unit of the light-emitting pixels unit of adjacent triplex row is staggered successively, and so that whenever the adjacent three behavior cycles expand on line direction.Because each subpixel unit of PMOLED does not comprise transistor and attached drive circuit thereof, thereby luminous organic material layer 15 area occupied in each subpixel unit is big, aperture opening ratio is big.
Embodiment 2: as shown in Figure 5, each subpixel unit of AMOLED comprises low-temperature polysilicon film transistor (the LTP-Si TFT with switching function, LowTemperature Poly-Si Thin FilmTransistor) and the luminous organic material layer, and each pixel is equipped with a charge storage capacitance, peripheral drive circuit and array of display whole system are integrated on the same glass substrate, and the luminous organic material layer is by the thin-film transistor control luminance of each light-emitting pixels unit self.(N is 6 to N * M in the present embodiment, M is 2) individual light-emitting pixels unit is according to matrix structure, each light-emitting pixels unit 1 in the basic unit 9 is made up of red (R) subpixel unit 11, green (G) subpixel unit 12 and each one of blue (B) subpixel unit, each subpixel unit comprises thin-film transistor 14 and luminous organic material layer 15 again, in the above-mentioned arrangement architecture, the homochromy subpixel unit of the light-emitting pixels unit of adjacent triplex row is staggered successively, and so that whenever the adjacent three behavior cycles expand on line direction.Because each subpixel unit of AMOLED comprises transistor and attached drive circuit thereof, thereby luminous organic material layer 15 relative PMOLED of area occupied in each subpixel unit is less, aperture opening ratio is little.
No matter be AMOLED and PMOLED, its machine luminous material layer 15 generally all forms by organic material being carried out vacuum vapor plating, in order on glass substrate, to form the various details of display screen, the general mask plate of metal material that adopts is controlled the plated film position of organic material in basic unit 9, because needing the R/G/B sub-pixel unit to show respectively, OLED could ideally show real image, and the R/G/B sub-pixel unit all is different luminous organic material, so need to adopt the mask plate of metal material to come R/G/B sub-pixel unit difference evaporation organic material.Among the present invention, the size of the subpixel unit of AMOLED and PMOLED is all very little, its minor face distance H (vertically) is of a size of about 150 μ m, minor face is about 50 μ m apart from V (laterally), spacing between the adjacent subpixel unit is 10-20 μ m, and the spacing between the adjacent light-emitting pixels unit is 10-20 μ m.Therefore, the invention provides a kind of mask plate, as shown in Figure 6, described mask plate comprises the rectangular opening 22 on substrate 2 and the substrate, the opening size of rectangular opening 22 is greater than the subpixel unit, rectangular opening 22 arrangement modes are identical with the arrangement mode of wherein a kind of homochromy subpixel unit of light-emitting pixels unit, and the rectangular opening 22 of adjacent triplex row is staggered successively, and so that whenever the adjacent three behavior cycles expand on line direction.Be on the size of rectangular opening 22 that for AMOLED and its main difference of PMOLED rectangular opening 22 is corresponding with the shape of the luminous organic material layer 15 of its luminous subpixel unit, surrounds luminous organic material layer 15 just.
According to OLED display of the present invention and mask plate thereof, mask plate of the present invention to method for position is:
S1. make wherein a kind of homochromy subpixel unit contraposition of the rectangular opening 22 of mask plate and OLED display good and carry out the evaporation of luminous organic material;
S2. after finishing the evaporation of luminous organic material of above-mentioned homochromy subpixel unit, make mask plate move the long back gauge V of a sub-pixel unit and carry out the evaporation of second kind of luminous organic material to adjacent lines relative to the OLED display;
S3. after finishing the evaporation of luminous organic material of above-mentioned two kinds of homochromy subpixel unit, make mask plate move the long back gauge V of a sub-pixel unit and carry out the evaporation of the third luminous organic material to adjacent lines along same direction again, up to the evaporation of the luminous organic material of finishing three kinds of color subpixel unit relative to the OLED display.
The mask plate of the relative prior art of mask plate of said structure has better mechanical strength, in using engineering, be subjected to the do time spent of mask plate mould from the fixedly tensile force f in four directions, still can keep stronger mechanical strength, thereby be out of shape little, under the same conditions, can do thinlyyer than existing mask plate.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present invention, should to be understood that protection scope of the present invention is not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, all be considered to belong to the protection range of claim of the present invention.
Claims (4)
1. OLED display, light-emitting pixels unit by multiple row and multirow is formed, every group of light-emitting pixels unit comprises a red subpixel unit, green subpixel unit and blue subpixel unit, it is characterized in that the homochromy subpixel unit of the light-emitting pixels unit of adjacent triplex row is staggered successively.
2. the mask plate of an OLED display, described mask plate comprises the rectangular opening on substrate and the substrate, it is characterized in that, the opening size of described rectangular opening is greater than the subpixel unit, described rectangular opening arrangement mode is identical with the arrangement mode of wherein a kind of homochromy subpixel unit of light-emitting pixels unit, and the rectangular opening of adjacent triplex row is staggered successively.
3. the mask plate of a kind of OLED display according to claim 2 is characterized in that, the corresponding luminous organic material layer that also surrounds just with the shape of the luminous organic material layer of its luminous subpixel unit of described rectangular opening.
4. the mask plate of an OLED display is characterized in that method for position, comprises step:
S1. make wherein a kind of homochromy subpixel unit contraposition of the rectangular opening of mask plate and OLED display good and carry out the evaporation of luminous organic material;
S2. after finishing the evaporation of luminous organic material of above-mentioned homochromy subpixel unit, after finishing the evaporation of luminous organic material of above-mentioned homochromy subpixel unit, make mask plate move the long back gauge of a sub-pixel unit and carry out the evaporation of second kind of luminous organic material to adjacent lines relative to the OLED display;
S3. after finishing the evaporation of luminous organic material of above-mentioned two kinds of homochromy subpixel unit, make mask plate move the long back gauge of a sub-pixel unit and carry out the evaporation of the third luminous organic material to adjacent lines along same direction again, up to the evaporation of the luminous organic material of finishing three kinds of color subpixel unit relative to the OLED display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102650588A CN101752407B (en) | 2009-12-31 | 2009-12-31 | OLED display, mask and mask alignment method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102650588A CN101752407B (en) | 2009-12-31 | 2009-12-31 | OLED display, mask and mask alignment method thereof |
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| CN101752407A true CN101752407A (en) | 2010-06-23 |
| CN101752407B CN101752407B (en) | 2011-03-30 |
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| CN2009102650588A Expired - Fee Related CN101752407B (en) | 2009-12-31 | 2009-12-31 | OLED display, mask and mask alignment method thereof |
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| CN110923633B (en) * | 2019-12-18 | 2022-11-18 | 京东方科技集团股份有限公司 | Mask assembly, evaporation device and evaporation method |
| CN110923633A (en) * | 2019-12-18 | 2020-03-27 | 京东方科技集团股份有限公司 | Mask assembly, evaporation device and evaporation method |
| CN111180502A (en) * | 2020-03-09 | 2020-05-19 | 深圳市华星光电半导体显示技术有限公司 | Pixel arrangement structure and OLED display device |
| WO2021179385A1 (en) * | 2020-03-09 | 2021-09-16 | 深圳市华星光电半导体显示技术有限公司 | Pixel arrangement structure and oled display device |
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| CN101752407B (en) | 2011-03-30 |
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