CN113630926A - Organic electroluminescent screen and preparation method thereof - Google Patents
Organic electroluminescent screen and preparation method thereof Download PDFInfo
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- CN113630926A CN113630926A CN202010377217.XA CN202010377217A CN113630926A CN 113630926 A CN113630926 A CN 113630926A CN 202010377217 A CN202010377217 A CN 202010377217A CN 113630926 A CN113630926 A CN 113630926A
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/60—Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The application provides an organic electroluminescent screen body and a manufacturing method thereof, wherein a luminous zone of the organic electroluminescent screen body consists of one or more independently controlled luminous units with different shapes; the shape of the light-emitting unit is any one of a polygonal figure or a special-shaped geometric figure, or the combination of two or more of the polygonal figure and the special-shaped geometric figure, different light-emitting units are lightened by respectively electrifying different figures, and different lighting patterns are formed by controlling and lightening different light-emitting units; the lighting of different patterns can be realized only by independently supplying power to each pattern, and simultaneously, the shapes of the patterns are matched to form a high-brightness illumination pattern with smooth edges, so that the intellectualization and the graphization of the OLED illumination screen body are realized.
Description
Technical Field
The application relates to the technical field of illumination, in particular to an organic electroluminescent screen body and a preparation method thereof.
Background
Lighting is a fundamental requirement of people in daily life. The OLED lighting source is called as the light source closest to natural light because of the advantages of uniform light emission, eye protection, environmental protection, high color rendering index and the like. However, with the development of technology, the current single OLED lighting cannot meet the needs of people. More people hope to realize the lighting function and simultaneously have the requirements of intellectualization and patterning.
The PMOLED or AMOLED display screen can realize patterning and dynamic effects, and the scheme for realizing image display of the OLED display screen is as follows: a plurality of patterns are provided, and a corresponding screen is formed by the pattern emitting light by driving a switch (or driving by a row-column scanning (PMOLED)) for controlling a single pattern of the TFT. Due to structural arrangement and to achieve richness of display pictures, the patterns are generally square or rectangular, and the size of the patterns is as small as possible to achieve high resolution. The brightness of the OLED display screen is generally 100cd/m2On the left and right sides, high brightness cannot be realized, the lighting function cannot be met, and the problems of complex process, high manufacturing cost and the like exist in the display screen.
The organic electroluminescent screen body for realizing the illumination function has higher brightness which is generally 1000cd/m2On the left and right sides, different luminous areas are not arranged, so that the manufacturing cost and the process are both lower and simpler.
Disclosure of Invention
In order to overcome the defects or shortcomings of the existing OLED panel in intelligent brightness and complex patterning process, the invention aims to provide an organic electroluminescent screen body capable of giving consideration to both intelligent brightness and patterns and a preparation method thereof.
In a first aspect, the present invention provides an organic electroluminescent panel, wherein a light emitting region of the panel is composed of one or more independently controlled light emitting units with different shapes; the shape of the light-emitting unit is any one of a polygonal figure or a special-shaped geometric figure, or the combination of two or more of the polygonal figure and the special-shaped geometric figure.
According to the technical scheme provided by the embodiment of the application, at least two of the shapes of the graphs, the shapes of the light-emitting units and the appearance of the screen body are adaptive, and each graph can independently emit light.
According to the technical scheme provided by the embodiment of the application, the light-emitting unit is composed of at least 3 adjacent patterns, and the driving voltages of the patterns in the light-emitting unit are completely or partially different, so that the light-emitting unit forms a three-dimensional illumination pattern.
According to the technical scheme provided by the embodiment of the application, a plurality of lead gaps are formed among the patterns in the light emitting area, and the electrode leads of the patterns on two sides of the lead gaps extend out of the leading-out ends of the lead gaps to the screen body binding ends;
the patterns on two sides of the lead gap comprise a first pattern and a second pattern; the first graph is the graph which is farthest from the leading-out end on two sides of the lead gap;
the electrode lead of the first pattern comprises a main lead part positioned in a lead gap, and the end part of the main lead part is connected with a main electrode area below the first pattern;
the electrode lead of the second pattern comprises a winding part and a main lead part positioned in a lead gap; the winding portion is disposed around the second pattern, and one end thereof is connected to the main lead portion of the second pattern and the other end thereof is connected to the main electrode region below the second pattern.
According to the technical scheme provided by the embodiment of the application, the end part of the main lead part of the first pattern is connected with the middle part of the main electrode region; the end of the winding portion of the second pattern is connected to the middle of the main electrode region.
According to the technical scheme provided by the embodiment of the application, when the connection end of the main electrode region and the main lead part or the winding part is positioned at the taper angle part of the main electrode region; the main electrode region is provided with a corresponding taper angle opening at the taper angle part, so that the injection current of the electrode lead is introduced to the middle part of the edge of the graph.
According to the technical scheme provided by the embodiment of the application, the luminous area is formed by combining at least one or two or more patterns of an equilateral triangle, a right-angled triangle, an irregular triangle, a parallelogram, an irregular quadrilateral, a pentagon and a hexagon.
According to the technical scheme provided by the embodiment of the application, the shape of the screen body is a polygon or a special-shaped geometric figure. According to the technical scheme provided by the embodiment of the application, the shape of the light emitting area is a polygon or a special-shaped geometric figure.
In a second aspect, the present application provides a method for preparing an organic electroluminescent panel, comprising the following steps:
depositing an anode material on a substrate to form an anode layer;
etching the anode layer to form at least one partition with at least one different shape;
coating an insulating layer on the anode layer to form a pattern corresponding to each partition;
using MASK to evaporate an organic functional layer material and a cathode material; the MASK is evaporated together corresponding to all the patterns to form the same-color illumination pattern, or the MASK is evaporated separately corresponding to each partition to form the multi-color illumination pattern.
The invention has the advantages that: the whole luminous zone of the organic electroluminescent screen body for illumination is divided, so that the luminous zone of the screen body consists of one or more independently controlled luminous units with different shapes; the shape of the light-emitting units is any one of polygonal figures or special-shaped geometric figures, or the combination of two or more of the polygonal figures or the special-shaped geometric figures, different light-emitting units are lightened by respectively electrifying different figures, and different lighting patterns are formed by controlling and lightening different light-emitting units; compared with the fine graphic design and the TFT driving mode of the electroluminescent screen body for displaying, the scheme adopts simple process and driving mode, different lighting patterns can be realized only by supplying power to each graphic independently, and meanwhile, the shape of the graphic is matched, so that the highlighted lighting pattern with smooth edges is formed, and the intellectualization and the imaging of the OLED lighting screen body are realized.
According to the technical scheme of some embodiments of the present application, the light emitting unit is composed of at least 3 adjacent patterns, and the driving voltages of the patterns in the light emitting unit are completely or partially different, so that the light emitting unit forms a three-dimensional illumination pattern; the three-dimensional illumination pattern effect further improves the aesthetic property of the screen body.
According to the technical scheme provided by some embodiments of the application, the winding part surrounding the second pattern is designed for the electrode lead in the lead gap of the second pattern, so that when the design requirement that the lead resistances of the first pattern and the second pattern are the same is met (the design requirement is to ensure that the brightness of each pattern is the same), the lead resistance of the second pattern can be kept consistent with the lead resistance of the first pattern by increasing the length of the winding part, compared with the method of increasing the lead width of the first pattern adopted in the prior art, the scheme balances the occupation ratio of the lead gap and the non-lead gap between the electrode lead and the patterns, thereby not only increasing the area of the patterns, but also reducing the widths of the lead gap and the non-lead gap, effectively increasing the aperture ratio of the patterns, further improving the screen brightness, and due to the reduction of the lead gap and the non-lead gap, the effect of the illumination patterning is more vivid and lifelike.
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of an OLED lighting screen in the prior art;
FIGS. 2a and 2b are schematic cross-sectional structural diagrams of an OLED lighting screen body in example 1;
FIGS. 3-27 are schematic diagrams of the graphs, screen body shapes and corresponding exemplary illumination patterns of different OLED illumination screens in example 1;
fig. 28 to 30 are schematic views of an outlet structure of an electrode lead in embodiment 1, wherein fig. 30 is an enlarged structure view of a portion a in fig. 29;
fig. 31-37 are schematic structural views of embodiment 2, wherein fig. 32 is a schematic structural view of part B in fig. 31, and fig. 33 is a schematic structural view of part C in fig. 31; fig. 35 is a schematic structural view of a portion D in fig. 34, and fig. 36 is a schematic structural view of a portion E in fig. 34;
FIG. 38 is a flowchart of example 3.
Reference numbers in the figures:
1. a screen body; 2. a graph; 3. a substrate; 4. an anode; 5. an organic functional layer; 6. a cathode; 7 an insulating layer; 8. a binding region; 9. a lead gap; 11. a first pattern electrode lead; 12. a second pattern electrode lead; 11a, a first main lead portion; 12a, a second main lead portion; 12b, a winding portion; 13. a main electrode region; 2a, a first graph; 2b, a second pattern.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
In the organic electroluminescent screen provided by this embodiment, the screen provided by this embodiment is used for illumination, and the light emitting region of the screen 1 is composed of one or more independently controlled light emitting units with different shapes; the shape of the light-emitting unit is any one of a polygonal figure or a special-shaped geometric figure, or the combination of two or more of the polygonal figure and the special-shaped geometric figure.
As shown in FIG. 1, which is a schematic cross-sectional view of an organic electroluminescent panel for illumination in the prior art, the organic electroluminescent panel comprises a substrate 3, an anode 4, an organic functional layer 5 and a cathode 6 in this order, wherein the organic functional layer 5 is in the form of a film
As shown in fig. 2a, a cross-sectional structure of the light-emitting screen body provided in this embodiment shows, for example, a light-emitting area is divided to form 3 patterns 2, and each pattern 2 forms a light-emitting unit; the 3 patterns 2 are in the same color, the anode 4 is isolated by the insulating layer 7 at the moment, power is supplied to each pattern independently, and the different light-emitting units are lightened by supplying power to the different light-emitting units; therefore, the lighting patterns with different shapes are formed by the lighted light-emitting units, and the intellectualization and the imaging of the OLED lighting screen body are realized.
As shown in fig. 2b, another cross-sectional structure of the light-emitting screen body provided in this embodiment is shown, for example, a light-emitting area is divided to form 3 patterns 2, and each pattern 2 forms a light-emitting unit; 3 the different colours of figure 2, 3 through insulating layer 7 intervals between figure 2 and the positive pole 4 that corresponds, each luminescence unit supplies power alone, has realized lighting of different luminescence units promptly through supplying power for different luminescence units to form the different illumination pattern of shape difference and colour collocation through the luminescence unit of lighting, realized the intellectuality and the graphically of OLED lighting screen body.
The figure 2 comprises various triangular shapes such as equilateral triangles, right-angled triangles and irregular triangles, various quadrilateral shapes such as parallelograms and irregular quadrilaterals, various other polygonal shapes such as pentagons, hexagons, heptagons and octagons, and can also be any other shapes designed according to requirements. The matching of part of different patterns can form light-emitting units with different shapes, and the matching of all the patterns can form light-emitting areas with different shapes, so that the appearance of the light-emitting areas is a polygon or a special-shaped geometric pattern; meanwhile, 1, 2 or more patterns with the same shape and adjacent patterns can form a light-emitting unit, and 2 or more patterns with different shapes and adjacent patterns can also form a light-emitting unit.
As shown in fig. 3: the shapes of the graphs 2 in the screen body 1 provided by the embodiment are parallelogram, rhombus and equilateral triangle, and the total number of the graphs 2 is 35; the luminous area formed by combining the patterns 2 with different shapes is hexagonal; meanwhile, in the embodiment, the shape of the screen body 1 is designed into a corresponding hexagon; the shape of the screen body 1 is adapted to the shape of the luminous area, so that the attractiveness of the screen body 1 is improved; in this embodiment, a light emitting unit may be formed by a rhombus pattern and a parallelogram pattern adjacent to the rhombus pattern, and a cubic illumination pattern may be formed when the driving voltages of the 3 patterns in the light emitting unit are different; or two parallelogram patterns and two adjacent equilateral triangle patterns form a light-emitting unit, and when the driving voltage parts of the 4 patterns in the light-emitting unit are different (the driving voltages of only two equilateral triangles are the same), a cubic lighting pattern can be formed.
The lighting pattern of the cube formed by the two light-emitting units is shown as a shaded part in fig. 4, and the stereoscopic vision effect of the superposition of a plurality of cubes is achieved by lighting up part of the parallelogram-shaped pattern 2, and the brightness of the pattern 2 on the top surface of the cube is lower than that of the pattern 2 on the side edge; fig. 4 is only one illumination pattern based on the design of the pattern 2 shown in fig. 3, and it will be understood by those skilled in the art that other illumination pattern effects can be achieved by illuminating different patterns 2, for example, the illumination pattern shown by the hatched portion in fig. 5, in which case the light emitting units can be formed by two adjacent equilateral triangle patterns, or by a diamond pattern, and the illumination of part of the light emitting units can form the illumination pattern shown in fig. 5.
As shown in fig. 6 and 7, the shape of the pattern 2 provided in the present embodiment is a rhombus, and the size and shape of each rhombus pattern are identical, and the number of the patterns 2 is 6 in total; the 6 rhombus patterns are spliced into a snowflake-shaped luminous zone; meanwhile, in the embodiment, the shape of the screen body 1 is designed into a corresponding hexagonal star shape; the shape of the screen body 1 is adapted to the shape of the luminous area, so that the attractiveness of the screen body is improved; in the present embodiment, the light emitting unit is a combination of 6 diamond patterns, and as shown by the hatched portion in fig. 7, such a snowflake-shaped illumination pattern of fig. 7 can be achieved by lighting the light emitting unit; similarly, in the present embodiment, only 2, 3 or 4 of the patterns may be lit to form other illuminable patterns.
As shown in fig. 8 to 10, the shape of the graph 2 provided in the present embodiment is a parallelogram and a triangle; when one light emitting unit is formed in two adjacent rows, three spaced diagonal shaped illumination patterns as shown in fig. 9 can be formed by lighting three light emitting units at intervals; when one light emitting unit is formed with 9 adjacent patterns 2 in the same row, an illumination pattern of three spaced stripes as shown in fig. 10 can be formed; when one or more parallelograms and a triangle form a light-emitting unit, an illumination pattern adapted to the shape of the screen body can be formed; similarly, in the present embodiment, the light emitting units may be a combination of other positions and numbers of the patterns 2, and other illumination patterns may be formed by lighting different positions and numbers of the light emitting units.
As shown in fig. 11 to 12, the shape of the pattern 2 provided in this embodiment is a parallelogram, the shape of the screen body is a hexagon, and the pattern arrangement of 80 parallelograms forms a fishtail-shaped light emitting area; 8 adjacent patterns 2 which are symmetrical up and down are used as a light-emitting unit; the illumination pattern of the three bending stripe shapes shown in the hatched portion of fig. 12 can be realized by lighting the light emitting units of different columns; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 13 to 14, the shape of the pattern 2 provided by this embodiment is pentagonal and rhombic, the shape of the screen body is octagonal, and 68 pentagonal patterns and rhombic patterns are arranged to form a bubble-shaped light emitting area; when two adjacent pentagons and the rhombus-shaped patterns respectively adjacent to the two pentagon patterns are taken as a light-emitting unit, a solid polyhedral-shaped lighting pattern shown by the hatched part of fig. 14 can be realized by lighting different light-emitting units, one driving voltage, for example 4.3V, is applied to the two pentagon patterns in the light-emitting unit, and the other driving voltage, for example 4V, is applied to the two rhombus-shaped patterns in the light-emitting unit, so that the patterns in the light-emitting unit have two kinds of brightness, and the cooperation of the two kinds of brightness and the shapes of the patterns in the light-emitting unit forms the solid lighting pattern; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 15 to 16, the shape of the pattern 2 provided in the present embodiment is a hexagon, and the arrangement of the hexagon pattern forms a honeycomb-shaped light emitting region; the shape of the screen body is a corresponding hexagon, and each graph is a light-emitting unit; the appearance of the screen body is adapted to the appearance of the luminous area and the appearance of the luminous unit, so that the screen is more attractive; the dot illumination pattern shown in phantom in fig. 16 can be realized by illuminating different graphics 2; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 17 to 18, the shape of the pattern 2 provided in the present embodiment is a right triangle, and the right triangle-shaped patterns 2 are arranged to form a windmill-shaped light emitting region; each graph is a light-emitting unit, and the shape of the screen body is square; the windmill-like illumination pattern shown in the hatched portion of fig. 18 can be realized by lighting up different patterns 2; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 19 to 21, the shape of the pattern 2 provided in the present embodiment is a right triangle, and the patterns 2 of the right triangle are arranged to form a light emitting region having a rectangular shape and a cross-shaped middle portion; the screen body is square corresponding to the shape of the screen body, so that the appearance of the screen body is adapted to the appearance of the luminous zone, and the screen is more attractive; in this embodiment, a combination of the graphics covered by the shaded portion in fig. 20 may be defined as a light emitting unit, and a three-dimensional illumination pattern shown by the shaded portion in fig. 20 may be formed by lighting the light emitting unit, in this embodiment, the graphics in a light emitting unit share a driving voltage, and three different driving voltages form different luminances of three surfaces of a cube, thereby achieving an effect of a three-dimensional illumination pattern; in this embodiment, it may be defined that a combination of patterns in the shaded portion in fig. 21 forms a light emitting unit, and an arrow-shaped illumination pattern as illustrated in fig. 21 may be formed by lighting the light emitting unit; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 22 to 24, the shape of the patterns 2 provided in the present embodiment is an equilateral triangle, and the patterns 2 of the equilateral triangle are arranged to form a light emitting area having a hexagonal shape and a grid-shaped middle part; the screen body is hexagonal corresponding to the shape of the screen body, so that the appearance of the screen body is adapted to the appearance of the luminous zone, and the screen is more attractive; defining a pixel composed of a pattern in the shaded portion in fig. 23 as a light emitting unit, and lighting the light emitting unit to form a lighting pattern of a hexagonal ring shape shown in the shaded portion in fig. 23; each pattern can also be defined as a light-emitting unit, and by lighting the light-emitting unit in the shaded portion in fig. 24, an a-letter-shaped lighting pattern as shown in fig. 24 can be formed; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
As shown in fig. 25 to 27, the shape of the patterns 2 provided in the present embodiment is an equilateral triangle, and the patterns 2 of the equilateral triangle are arranged to form a light emitting area having an equilateral triangle shape and a grid-shaped middle part; the screen body 1 is a trilateral shape corresponding to the shape, so that the appearance of the screen body is matched with that of the luminous zone, and the screen body is more attractive; defining the combination of the figures covered by the hatched portion in fig. 26 as a light-emitting unit, and lighting the light-emitting unit to form a three-sided ring-shaped lighting pattern shown by the hatched portion in fig. 26; it is also possible to define a single pattern as one light emitting unit, and three diagonal bar-shaped illumination patterns as shown in fig. 27 can be formed by lighting a combination of patterns covered with hatched portions in fig. 27; similarly, in this embodiment, only some of the patterns may be lit to form other illuminable patterns.
In fig. 3 to 27, hatching is merely an illustration of the structure and visual distinction of the lighted partial figures, and does not limit the present invention.
Preferably, in this embodiment, the illumination brightness of the screen body can be reduced compared to the prior art screen body for illumination, so as to improve the service life of the illumination screen body, for example, the brightness of the screen body is 800cd/m2To 900cd/m2。
In this embodiment, the whole light emitting area of the organic electroluminescent screen body for illumination is divided to form two or more patterns, different patterns are combined to form light emitting units, the patterns are designed to be polygonal, the patterns with the same or different shapes form different light emitting units, the different light emitting units are respectively electrified to enable the lighted light emitting units to form graphical illumination patterns, the different patterns are matched to form different light emitting units, and the lighting of the different light emitting units can be matched to form different changeable illumination patterns; when the colors of different patterns in the same light-emitting unit are different or the colors of the patterns in different light-emitting units are different, the lighting patterns with color matching change can be realized; the brightness of different patterns in the same light-emitting unit can be lightened by different brightness, so that a three-dimensional illumination pattern is formed; compared with the fine pattern design and the TFT driving mode of the electroluminescent screen body for displaying, the scheme can realize the lighting of different light-emitting units only by independently supplying power to each light-emitting unit, and simultaneously forms a high-brightness illumination pattern with smooth edges by matching with the shape of the pattern, thereby realizing the intellectualization and the imaging of the OLED illumination screen body.
3-27 are only exemplary of the way in which embodiments of the present application may be implemented, and are not limited to the above embodiments, for example, the shape of the screen body may be other polygonal shapes or irregular geometric shapes; for example, the shape of the light emitting region may be other polygonal shapes or irregular geometric shapes. In this embodiment, the pattern is in a polygonal shape, so that the pattern can be more continuous and beautiful when formed, and based on the design idea of the present invention, it is not excluded that the pattern is designed in a special shape, for example, the pattern is designed in a scattered clover shape, a circular shape, and the like, which are all within the protection scope of the present application.
According to the technical scheme of the embodiment, the shape of the graph can be adapted to the shape of the light-emitting unit, as shown in the examples of fig. 5, 9, 10, 16 and 18; the shape of the screen body can be adapted to the shape of the light-emitting unit, as shown in fig. 7, 13, 16, 23, and 26, and if the light-emitting unit is a single pattern, the shapes of the light-emitting unit, the pattern, and the screen body can be adapted to each other at the same time; the adaptive state enables the appearance of the illumination pattern to be adaptive to the shape of the graph or the screen body, so that the appearance is more attractive during illumination.
In the technical scheme of this embodiment, when the light emitting unit is composed of at least 3 adjacent patterns, and the driving voltages of the patterns in the light emitting unit are completely or partially different, so that the light emitting unit forms a three-dimensional illumination pattern, as shown in fig. 4, the three patterns can be illuminated with different brightness to realize the effect of the cubic illumination pattern by the light emitting units formed by the 3 parallelogram patterns sharing the same side in pairs; the light-emitting units formed by the 4 patterns which are two-by-two and share the same side as shown in FIG. 14 realize a pearl-shaped three-dimensional lighting pattern; the effect of a cubic illumination pattern is also realized as in fig. 20. The stereoscopic illumination pattern increases the visual aesthetics of the illuminated display pattern.
Example 2
In addition to embodiment 1, in this embodiment, in order to further increase the aperture ratio, the anode 4 of the partial pattern 2 adopts a winding design, and the specific implementation is as follows:
taking the OLED lighting screen body shown in the structure of fig. 19 as an example, the structure of the anode 4 on the screen body corresponding to each pattern is shown in fig. 28, non-light-emitting gaps are formed between the patterns 2, as shown in fig. 28, when the bonding region 8 of the screen body is designed at the lower part of the screen body, a lead gap 9 is formed in each column of longitudinal non-light-emitting gaps, the outlet ends of the lead gaps 9 are all located at the bottom, and the electrode leads of each pattern 2 extend out from the lead ends and are connected to the bonding region 8.
As shown in fig. 29 and fig. 30, corresponding to each lead slit 9, the graph farthest from the outlet end is defined as a first graph 2a, the other graphs of the electrode leads led out from the lead slit 9 are defined as second graphs 2b, and the resistance of the electrode leads of each graph 2 coming out from the lead slit 9 needs to be kept consistent (the difference between the resistance values is less than 10%), so as to ensure that the brightness of each graph 2 is consistent; taking the first pattern 2a and the bottommost second pattern 2b as an example, as shown in fig. 30 in this embodiment, the electrode lead of the first pattern 2a is defined as a first pattern electrode lead 11, the length of the first pattern electrode lead 11 is L1, and the width is W1; defining the electrode lead of the second pattern 2b as a second pattern electrode lead 12, the second pattern electrode lead 12 having a length of L2 and a width of W2; in order to meet the requirements, L2/W2 is L1/W1; if the length of L1 is several times the length of L2, then the width of W1 is several times the width of W2. There is a minimum width value (e.g., 10 μm) for the lead width design due to limitations in tooling equipment, etc. Therefore, after the electrode leads of other patterns 2 on the two sides of the lead gap 9 are arranged, the luminous gap is not large, so that the luminous opening rate of the screen body is low, the brightness of the screen body is low, and meanwhile, the luminous pattern effect is poor due to the large luminous gap.
In the present embodiment, as shown in fig. 31 to 33, the electrode lead of the first pattern 2a includes a main lead portion located in the lead slit 9, and the main lead portion of the electrode lead 11 of the first pattern is defined as a first main lead portion 11 a; as shown in fig. 33, the end of the first main lead portion 11a is connected to the main electrode region 13 covered with the first pattern 2 a;
the electrode lead of the second pattern 2b comprises a winding part 12b and a main lead part positioned in the lead gap 9, the main lead part of the electrode lead 12 of the second pattern is defined as 12a, and the winding part is defined as 12 b; as shown in fig. 32, the winding portion 12b is provided around the second pattern 2b, and one end thereof is connected to the second main lead portion 12a and the other end thereof is connected to the main electrode region 13 below the second pattern 2 b.
In the present embodiment, the widths of the first and second main lead portions 11a and 12a may be uniform, and the length of the second pattern electrode lead 12 may be increased by increasing the length of the winding portion 12b, so that the resistance values of the first and second pattern electrode leads 11 and 12 are the same or close. The length L2 of the second pattern electrode lead 12 is the same as or similar to the length L1 of the first pattern electrode lead 11, the width W1 of the first pattern electrode lead 11 is greatly reduced; in the embodiment, the shape of the pattern 2 is an equilateral right-angled triangle, and when the lead outgoing mode of the embodiment 1 is adopted, on the premise of the same size of the luminous zone, the size of the lead gap 9 is inversely proportional to the length of the right-angled side of the pattern 2, so that the width of the transverse gap and the inclined gap formed between the patterns is correspondingly increased although the transverse gap and the inclined gap are not used for outgoing, and thus the opening ratio of the luminous zone of the screen body is small; in the embodiment, the electrode leads are simultaneously arranged in the transverse gaps and the inclined gaps which are not used for outgoing lines in a winding design mode, namely winding parts of the electrode leads are arranged in the original blank area, so that the side length of an equilateral right-angled triangle figure is increased, the area of the figure is increased, the widths of the lead gaps and the non-lead gaps are reduced, the opening ratio of a light emitting area is obviously improved, and compared with the arrangement mode of the electrode leads in fig. 30, the opening ratio of the light emitting area of the screen body is improved from 65% to 85% due to the design in fig. 32.
In a further preferred embodiment, in order to further improve the uniformity of the light emission luminance of each pattern 2, as shown in fig. 34 to 36, in the present embodiment, the following design is adopted as the connection method of the electrode lead and the main electrode region:
1. a middle access method: the electrode leads are accessed from the edge center of the pattern 2, for example, as shown in fig. 34, 36, 37, the end of the first main lead portion 11a of the first pattern 2a is connected to the center of its corresponding main electrode region 13; the end of the winding portion 12b of the second pattern 2b is connected to the middle of the corresponding main electrode region 13.
2. A split-flow design method: the connection end of the main electrode region 13 and the main lead portion or the winding portion 12b is located at a taper angle portion thereof; the body electrode 13 is provided with a corresponding taper angle opening at the taper angle portion, so that the injection current of the electrode lead is introduced to the middle of the edge of the pattern 2. As shown in fig. 35, the bottom of the main electrode region 13 under the first pattern 2a is cone-shaped, and a cone-shaped opening is designed at the bottom, so that the current of the first main lead portion 11a is divided to the middle of the two sides of the cone angle, thereby avoiding the accumulation of current at the cone angle to cause high pattern layout brightness; the shunt design method can also be used when the winding portion 12b of the second pattern 2b is designed to have a length such that the current connecting position with the main electrode region is just at the taper angle of the main electrode region.
In the shunt design, preferably, the proportional relation between the opening length LA on each side of the cone-shaped opening and the edge length LB of the main electrode region 13 where the cone-shaped opening is located is LA/LB which is greater than or equal to 1/5 and less than or equal to 4/5, so that the current access position can be ensured to avoid the cone angle, and the problem that the pattern is locally highlighted due to the accumulation of current at the cone angle is effectively solved.
The electrode leads of the first pattern 2a and the second pattern 2b may be connected to the main electrode region 13 by the above-mentioned center connection method or a shunt design, for example, the first main lead portion 11a of the first pattern 2a may be connected to the main electrode region by a shunt design as shown in fig. 35 or a center connection method as shown in fig. 36; the shape of the pattern and the length and position of the electrode lead can be selected according to design requirements.
The above design avoids the problem of uneven pattern luminance when the electrode leads of the first pattern 2a inject current into the first pattern 2a as in fig. 31 and 33; in fig. 33, a current is accumulated in the taper portion at the lower right corner of the first pattern 2a, and the luminance at that portion is brighter than other portions, so that the light emission luminance of the pattern is not uniform.
Therefore, in this embodiment, by designing the middle access method of the electrode lead or performing the shunt design, the current accumulation is avoided, and the uniformity of the light emission luminance of the pattern 2 is improved, in this embodiment, the winding design of the electrode lead, the design of the current injection position of each pattern, and the patterning design and the lighting scheme of the pattern in embodiment 1 are combined with each other, and the aesthetic property of the patterned lighting pattern is increased in both the luminance uniformity and the continuity between the lighting patterns.
Example 3
The embodiment provides a method for preparing an organic electroluminescent panel described in embodiment 1, including the following steps:
s1, depositing an anode material on a substrate to form an anode layer;
s2, etching the anode layer to form at least one polygonal partition;
s3, coating an insulating layer on the anode layer to form a pattern corresponding to each partition;
s4, evaporating an organic functional layer material and a cathode material by using MASK; the MASK is evaporated together corresponding to all the patterns to form the same-color illumination pattern, or the MASK is evaporated separately corresponding to each partition to form the multi-color illumination pattern.
In the embodiment, since the outline of the illumination pattern is not required to be designed to have a fine area size of micrometer, a large gap, for example, 0.1-1mm, may be formed in each light-emitting partition during the etching process; and in the process of forming the pattern, the same color or multicolor patterns can be formed. Therefore, the screen body is simple in preparation process and low in cost.
In this embodiment, the design of the shapes and the widths and the lengths of the winding portion 12b and the main lead portion of the electrode lead in embodiment 2 can be implemented when the anode layer is etched in step S2.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. An organic electroluminescent screen body is characterized in that a luminous zone of the screen body consists of one or more independently controlled luminous units with different shapes; the shape of the light-emitting unit is any one of a polygonal figure or a special-shaped geometric figure, or the combination of two or more of the polygonal figure and the special-shaped geometric figure.
2. The organic electroluminescent screen of claim 1, wherein at least two of the shapes of the patterns, the shapes of the light-emitting units and the outer shape of the screen are adapted, and each pattern can independently emit light.
3. The organic electroluminescent screen of claim 1, wherein the light-emitting unit is composed of at least 3 adjacent patterns, and the driving voltage of each pattern in the light-emitting unit is completely or partially different, so that the light-emitting unit forms a three-dimensional illumination pattern.
4. An organic electroluminescent screen according to claim 1, wherein a plurality of lead slits are formed between the patterns in the light emitting region, and the electrode leads of the patterns on both sides of the lead slits extend from the leading ends of the lead slits to the binding ends of the screen;
the patterns on two sides of the lead gap comprise a first pattern and a second pattern; the first graph is the graph which is farthest from the leading-out end on two sides of the lead gap;
the electrode lead of the first pattern comprises a main lead part positioned in a lead gap, and the end part of the main lead part is connected with a main electrode area below the first pattern;
the electrode lead of the second pattern comprises a winding part and a main lead part positioned in a lead gap; the winding portion is disposed around the second pattern, and one end thereof is connected to the main lead portion of the second pattern and the other end thereof is connected to the main electrode region below the second pattern.
5. An organic electroluminescent panel according to claim 4, wherein the end of the main lead portion of the first pattern is connected to the middle of the main electrode region; the end of the winding portion of the second pattern is connected to the middle of the main electrode region.
6. An organic electroluminescent panel according to claim 4, wherein the connection end of the main electrode region to the main lead portion or the winding portion is located at a taper angle portion thereof; the main electrode region is provided with a corresponding taper angle opening at the taper angle part, so that the injection current of the electrode lead is introduced to the middle part of the edge of the graph.
7. An organic electroluminescent panel according to any one of claims 1 to 6, wherein the light-emitting region is formed by combining any one, two or more patterns of an equilateral triangle, a right-angled triangle, an irregular triangle, a parallelogram, an irregular quadrilateral, a pentagon and a hexagon.
8. An organic electroluminescent screen according to any one of claims 1 to 6, wherein the screen has a polygonal or irregular geometric shape.
9. An organic electroluminescent screen according to any one of claims 1 to 6, wherein the light-emitting region has a polygonal or irregular geometric shape.
10. A preparation method of an organic electroluminescent screen body is characterized by comprising the following steps:
depositing an anode material on a substrate to form an anode layer;
etching the anode layer to form at least one partition with at least one shape;
coating an insulating layer on the anode layer to form a pattern corresponding to each partition;
using MASK to evaporate an organic functional layer material and a cathode material; the MASK is evaporated together corresponding to all the patterns to form the same-color illumination pattern, or the MASK is evaporated separately corresponding to each partition to form the multi-color illumination pattern.
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