CN104299979B - Organic electroluminescent display panel - Google Patents

Abstract

A display panel includes: a substrate; an electrode layer formed on the substrate and having an electrode pattern; an organic material layer formed on the electrode layer, wherein the organic material layer and the electrode pattern are combined to form a plurality of pixel units, and at least one of the pixel units includes a plurality of sub-pixels of different light colors arranged in a triangle (Delta). In one embodiment, the sub-pixels of a pixel unit are arranged in a Delta with the sub-pixels of the same light color of an adjacent pixel unit. In another embodiment, the sub-pixels of the same light color include a straight strip arrangement. In the embodiment, when a mask opening is used for evaporation of a laser material, one opening can correspond to at least three sub-pixels of the same color.

Description

Organic electroluminescence display panel

technical field

The present invention relates to a display panel, and in particular to an organic electroluminescent display panel with high resolution.

Background technique

Flat panel display devices such as Liquid Crystal Display Device (LCD), Plasma Display Panel (PDP) or Organic Electroluminescent Display (OLED) are lighter, thinner and shorter than conventional cathode ray tube display devices , so it has gradually become a common flat-panel display device today. Among them, the organic electroluminescent display device has the advantages of thinness, flexibility, portability, full color, high brightness, power saving, wide viewing angle and high response speed.

Generally speaking, OLEDs can be divided into Small Molecule Organic Light Emitting Diodes (OLEDs) and Polymer Light Emitting Diodes (PLEDs) according to the types of light-emitting materials. Both materials have a conjugated chemical structure and high fluorescence efficiency, but the molecular weight difference between the two is quite large. The molecular weight of small molecule materials used in small molecule organic light emitting diodes is about hundreds, while that used in macromolecular organic light emitting diodes is about a few hundred. The molecular weight of polymer materials is about tens of thousands to millions. Small molecule materials are processed by vacuum system and shadow mask (Shadow Mask) for thermal evaporation (Vacuum Thermal Evaporation, VTE) of organic materials. On the other hand, polymer materials are dispersed in pixels by solution spin coating or ink jet printing (Ink Jet Printing) technology. The film formation process does not require a vacuum environment, and the equipment cost is relatively low. Polymer materials are suitable for large-area applications, mainly for large-size displays, while small-molecule materials have better film-forming properties and are suitable for developing high-end products, mainly for small and medium-sized displays.

Take three independently emitting RGB subpixels (subpixels) of an OLED fabricated by evaporating red, green and blue materials as an example. Please refer to FIGS. 1A-1C , which are schematic diagrams of evaporating organic light emitting diode materials in a vacuum system. The upper and lower parts of the illustration are the top view and the section view respectively. The organic luminescent material 15 is evaporated onto a specific area mainly by means of vacuum thermal evaporation (VTE) combined with a technique of placing a mask 12 on a substrate 11 . As shown in FIG. 1B, a shadow mask (Shadow Mask) 12 is placed on a substrate 11. Since the shadow mask (Shadow Mask) is generally made of a metal material with a low thermal expansion coefficient (such as ), it is also called a metal mask (Metal Mask). ) or Fine Metal Mask (FMM). The mask 12 is, for example, formed on a thin metal plate by electroforming or etching to form a specific pattern (such as the array of openings 12 a in the figure), and the thin metal plate is welded on a metal frame 13 . When vapor-depositing one group of organic materials of red, blue and green, the pixel positions of the other two colors are shielded by the mask 12, for example, the position of the opening 12a (Fig. 1B) on the mask 12 corresponds to the position of the red pixel, and the evaporation The source 14 has a red organic luminescent material, and after the red organic luminescent material is evaporated to the opening 12a, the fabrication of the organic luminescent material 15 at the red pixel position is completed ( FIG. 1C ). Then the mask 12 or the substrate 11 is moved by a high-precision alignment system, and then the evaporation of the next group of color pixels is continued.

In the traditional method of vapor deposition, one opening position on the mask corresponds to one sub-pixel position, so the resolution of the product is limited by the FMM process capability.

When manufacturing high-precision panels, since the pixels and pitches become smaller, the accuracy of the alignment system, the error of the mask opening size, and the blockage and contamination of the mask opening are all key. Regardless of the above-mentioned sub-pixel arrangement method, limited by the FMM process capability, when traditionally produced by evaporation, an opening position on the mask corresponds to a sub-pixel with a maximum resolution of about 300PPI.

Contents of the invention

The invention relates to a display panel, especially an organic electroluminescent display panel, which can greatly improve the resolution of OLED products by utilizing the existing technological capabilities. In the embodiment, when the organic material is evaporated using the mask opening, one opening may correspond to at least three sub-pixels of the same color.

According to the present invention, a display panel is proposed, including: a substrate; an electrode layer formed on the substrate and having an electrode pattern; an organic material layer formed on the electrode layer, and the organic material layer and the electrode pattern are combined to form several For the pixel units, at least one of the pixel units includes several sub-pixels of different light colors arranged in a delta, and the sub-pixels of the same light color in the adjacent pixel units are also arranged in a delta.

According to the present invention, an organic electroluminescent display panel is proposed, comprising: a substrate; an electrode layer formed on the substrate and having an electrode pattern; an organic material layer formed on the electrode layer, and the organic material layer and the electrode pattern are combined to form Several pixel units, at least one of the pixel units includes several sub-pixels of different light colors arranged in a triangle (Delta), and the sub-pixels of the same light color adjacent to the pixel unit are arranged in straight lines, wherein, The pixel units are arranged in a matrix, and the pixel units in two adjacent rows or columns are arranged parallel to each other, and the geometric shapes of the pixel units in the two adjacent rows are opposite up and down.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific embodiments, together with the accompanying drawings, are described in detail as follows:

Description of drawings

1A-1C are schematic diagrams of evaporating organic light emitting diode materials in a vacuum system.

FIG. 2A is a top view of electrode patterns of the organic electroluminescence display panel according to the first embodiment of the present disclosure.

FIG. 2B is a top view of a shadow mask of the organic electroluminescence display panel according to the first embodiment of the present disclosure.

FIG. 3 is a top view of the pixel arrangement of the organic electroluminescence display panel according to the first embodiment of the present disclosure.

4A-4C are schematic diagrams of sequentially vapor-depositing organic materials of different colors using the mask of FIG. 2B in the first embodiment of the present disclosure.

FIG. 5A and FIG. 5B are respectively schematic diagrams showing the dimensions of a group of corresponding masks and pixels in the first embodiment.

FIG. 6 is a top view of a pixel arrangement of an organic electroluminescence display panel according to a second embodiment of the present disclosure.

FIG. 7 is a top view of a pixel arrangement of an organic electroluminescence display panel according to a third embodiment of the present disclosure.

FIG. 8 is a top view of a pixel arrangement of an organic electroluminescent display panel according to a fourth embodiment of the present disclosure.

FIG. 9 is a top view of a pixel arrangement of an organic electroluminescent display panel according to a fifth embodiment of the present disclosure.

Symbol Description:

11: Substrate

12, 32: mask

12a, 32a: Mask openings

13: Metal frame

15: Organic light-emitting materials

30: electrode pattern

341, 641, 741, 841, 941: Lighting Department

41: First laser material area

42: Second laser material area

43: Third laser material area

P, Pm, n: pixel unit

SP: sub-pixel

U _B : blue light-emitting unit

U _R : red light emitting unit

U _G : Green light-emitting unit

detailed description

The embodiment of the present disclosure proposes an organic electroluminescent display panel (OLED). Using the existing mask process capability, one opening of the mask corresponds to three sub-pixels, so that the resolution of the OLED product can be improved, up to 400PPI above.

In the organic electroluminescent display panel of the embodiment, at least one of the several pixel units includes several (for example three) sub-pixels of different light colors (such as RGB) arranged in a triangle (Delta); and adjacent to these pixels Three sub-pixels of the same light color (for example, constituting a light-emitting unit) are arranged in a triangle or a strip. In one embodiment, three adjacent sub-pixels of the same light color arranged in triangles or stripes are evaporated using the same mask opening.

Several implementations will be described in detail below with reference to the accompanying drawings. It should be noted that the structures and contents provided in the embodiments are for illustration purposes only, and the intended protection scope of the present disclosure is not limited to the above-mentioned aspects. Furthermore, the drawings have been simplified to clearly illustrate the content of the embodiments, and the size ratios in the drawings are not drawn in the same proportion as actual products, so they are not used to limit the protection scope of the present disclosure.

first embodiment

FIG. 2A is a top view of electrode patterns of the organic electroluminescence display panel according to the first embodiment of the present disclosure. FIG. 2B is a top view of a shadow mask of the organic electroluminescence display panel according to the first embodiment of the present disclosure. FIG. 3 is a top view of the pixel arrangement of the organic electroluminescence display panel according to the first embodiment of the present disclosure. Please also refer to the description of the vacuum thermal evaporation with mask technology in FIGS. 1A-1C .

The organic electroluminescence display panel of the first embodiment includes: an electrode layer having an electrode pattern 30 ( FIG. 2A ) formed on a substrate, and an organic material layer formed on the electrode layer. The combination of the organic material layer and the electrode pattern 30 constitutes several pixel units P. As shown in FIG. 3 , if they are distinguished by light color, several light _- emitting units U _R , U _G , and UB of the same light color may also be included. At least one of the pixel units P includes several (for example, three) sub-pixels of different light colors (such as red sub-pixels, green sub-pixels and blue sub-pixels) arranged in a triangle (Delta), and adjacent pixel units The sub-pixels of the same color are also arranged in a triangle. As shown in FIG. 3 , the light emitting units _UR , U _G , or _UB of the same light color include several light emitting parts 341 , for example, three light emitting parts 341 of the same light color are arranged in Delta.

4A-4C are schematic diagrams of sequentially vapor-depositing organic materials of different colors using the mask of FIG. 2B in the first embodiment of the present disclosure. In an embodiment, the organic material layer is, for example, laser materials of three different light colors. As shown in FIG. 4A , the first laser material (such as blue laser material) is vapor-deposited in the opening 32 a of the mask 32 to form several first laser material regions 41 . Next, the mask 32 or the substrate is moved to vapor-deposit the second laser material (eg, red laser material) in the opening 32 a of the mask 32 to form a plurality of second laser material regions 42 . Next, the mask 32 or the substrate is moved to vapor-deposit the third laser material (eg green laser material) in the opening 32 a of the mask 32 to form a plurality of third laser material regions 43 . In the embodiment, the main peak wavelength of the light emitted by the first laser material after being excited is in the range of 380 nm to 495 nm (blue light), and the main peak wavelength of the light emitted by the second laser material is in the range of 580 nm to 700 nm (red light), the main peak wavelength of light emitted by the third laser material after being excited is in the range of 495 nm to 590 nm (green light). The first laser material region 41, the second laser material region 42 and the third laser material region 43 are combined with the electrode pattern 30 to respectively form a plurality of light-emitting units of the first light color (such as blue light-emitting units UB), and several light-emitting units of the first light color. A light-emitting unit of two light colors (such as a red light-emitting unit UR) and several light-emitting units of a third color light-emitting unit (such as a green light-emitting unit UG). According to an embodiment, the first laser material region 41 has a continuous first laser material therein, the second laser material region 42 has a continuous second laser material therein, and the third laser material region 43 has a continuous third laser material therein.

Please refer to FIG. 3 and FIGS. 4A-4C. Although the illustration of the embodiment is illustrated by taking the first laser material region 41 / the second laser material region 42 / the third laser material region 43 to be equal in size as an example, the present disclosure is not limited thereto, and it can also be adjusted in practical applications. Design or make slight changes to the process, so that the area of the blue light-emitting unit is the largest, and the area of the green light-emitting unit is the smallest. For example, using different masks to evaporate laser materials with three different light colors. The mask has the largest opening, and the mask used to evaporate the green laser material has the smallest opening. Alternatively, electrode patterns of different sizes may also be arranged so that the areas of the light-emitting units of different light colors are not completely the same.

In addition, as shown in the pixel arrangement shown in FIG. 3 , the pixel units P in the first embodiment are substantially arranged in a matrix, for example arranged in m columns (rows) and n rows (columns), where m and n are positive integers. For example, the pixel unit in the second column (horizontal direction) can be expressed as P _2,n , the pixel unit in the third column can be expressed as P _3,n , ... and so on; the pixel unit in the seventh row (vertical direction) can be expressed as P _m,7 , the pixel unit in the eighth row can be expressed as P _m,8 , the pixel unit in the ninth row can be expressed as P _m,9 , and so on. As shown in Figure 3, the pixel units of two adjacent rows (such as the second column P _2,n and the third column P _3,n ) are arranged in parallel to each other, and the adjacent two rows (columns) (such as the seventh row P _m,7 and the eighth row P _m,8 , the eighth row P _m,8 and the ninth row P _m,9 ) are arranged in a dislocation.

Furthermore, in the first embodiment, between adjacent pixel units in the same column, adjacent sub-pixels have the same light color. As shown in FIG. 3 , for pixel units in the same row, adjacent pixel units are adjacent to at least one sub-pixel (/light-emitting portion) of the same light color. For example, in the second column, the pixel unit P _2,7 in the seventh row is adjacent to the pixel unit P _2,9 in the adjacent ninth row with a blue sub-pixel (/light-emitting portion). Taking the blue sub-pixels in the pixel units P _2,7 , P _2,9 and P _1,8 as an example, the same opening 32a of the mask is used to evaporate the blue laser material at the same time. Therefore, in the first embodiment, for pixel units in the same row, adjacent sub-pixels in adjacent pixel units are connected by at least one laser material of the same light color, for example, adjacent pixel units P 2, ₇ and P _{2 , and 9} are connected with blue laser materials (ie, the laser materials of adjacent light-emitting parts between adjacent pixel units in the same column are connected).

In one embodiment, the electrode layer is, for example, an ITO layer, and the electrode pattern 30 shown in FIG. 2A is formed after patterning the ITO. Although during laser material evaporation, the laser material in the first laser material region 41/second laser material region 42/third laser material region 43 of the same color is continuous, but due to the design of the electrode pattern 30, the organic material layer and the electrode After the pattern 30 is combined, the position where there is no light is the position where there is no ITO electrode. In the pixel arrangement shown in Figure 3, the three sub-pixels corresponding to the same light color in the light _- emitting unit U _R /U _G /UB are separated by a distance (G _S ), and the three sub-pixels of different light colors in the pixel unit P The RGB sub-pixels are also spaced apart by a pitch (G _P ).

In one embodiment, in the light-emitting units U _R /U _G /UB of the same light color, there is a distance ( _{G S} ) between the three sub-pixels (/light-emitting parts 341 ) of the same light color arranged in a triangle, and The pitch G _S is smaller than a pitch (G _P ) of sub-pixels of different light colors in the pixel unit P.

According to the OLED proposed in the embodiment, the resolution of the OLED product can be greatly improved by utilizing the existing mask process capability; for example, by using an FMM with a resolution of about 222PPI, a product with a resolution of about 400PPI can be obtained in the above-mentioned manner. Please refer to FIG. 5A and FIG. 5B , which are respectively schematic diagrams showing the dimensions of a group of corresponding masks and pixels in the first embodiment.

Take an existing FMM process capability as an example: 1. Evaporation accuracy: ±12 μm; total pitch (total pitch) ±7 μm/open accuracy (open accuracy) ±3 μm. 2. Minimum opening: about 30 μm; opening pitch: 20 μm. 3. Minimum slit opening distance: about 48 μm. As shown in FIG. 5A, in the mask 32, the minimum pitch is about 67.9 μm, the pitch (pitch) is about 114.5 μm, the opening 32a has a length of about 46.8 μm and a width of about 40.5 μm, and the resolution of the mask 32 is only about 222PPI . According to an embodiment, the pixel unit P and sub-pixels obtained by applying the mask 32 are shown in FIG. 5B, a pixel unit P has a length of about 81.8 μm and a width of about 63.5 μm, and the RGB sub-pixels in the pixel unit P are separated from each other About 23 μm (pitch G _P ); and a light-emitting unit composed of three sub-pixels of the same light color, such as a green light-emitting unit U _G , the three light-emitting parts 341 (/sub-pixel) of the same light color are separated from each other by about 8 μm (pitch G _S ), this pixel resolution is up to 400PPI.

Although in the first embodiment, the electrode pattern 30 is a quadrilateral/rhombic shape (FIG. 2A), the present disclosure is not limited thereto, and the geometric shape of the electrode pattern can be changed and adjusted according to actual applications, such as circular and rectangular , or other regular polygons, etc., as long as materials of the same color corresponding to at least three sub-pixels are simultaneously evaporated on an opening of the mask, it can be an application aspect of the present disclosure. Other embodiments are proposed below according to changes of the electrode pattern and the pixel arrangement pattern. Moreover, although the laser material is formed by vacuum evaporation and mask technology in the embodiment, the present disclosure is not limited to this process, and other processes that can form laser material such as ink jet printing, laser thermal Transfer printing (Laser-inducedThermal Imaging) or other processes can be applied.

second embodiment

FIG. 6 is a top view of a pixel arrangement of an organic electroluminescence display panel according to a second embodiment of the present disclosure. In the second embodiment, the shape of the electrode is circular. Those skilled in the art can clearly understand the electrode pattern and the mask pattern of the second embodiment according to the above-mentioned descriptions of FIGS. 2A , 2B, 3 and 4A-4C , and details will not be repeated here.

In the organic electroluminescent display panel of the second embodiment, an electrode layer of an electrode pattern is formed on a substrate, and an organic material layer is formed on the electrode layer. The combination of the organic material layer and the electrode pattern forms several pixel units P. As shown in FIG. 6 , if they are distinguished by light color, several light _- emitting units _UR , U _G , and UB of the same light color may also be included. At least one of the pixel units P includes several (for example, three) sub-pixels of different light colors (such as red sub-pixels, green sub-pixels and blue sub-pixels) arranged in Delta, and the same light color as that of adjacent pixel units The sub-pixels are also arranged in a triangle. As shown in FIG. 6 , the light emitting units _UR , U _G , or _UB of the same light color include several light emitting parts 641 , and the three light emitting parts 641 of the same light color are arranged in Delta.

Similar to the first embodiment, the second embodiment can use the same mask to combine the first laser material (such as blue laser material), the second laser material (such as red laser material) and the third laser material (such as green laser material) Evaporate in the openings of the mask in sequence (the sequence of light colors can be exchanged) to form laser material regions with different light colors. In the embodiment, the main peak wavelength of the light emitted by the first laser material after being excited is in the range of 380 nm to 495 nm (blue light), and the main peak wavelength of the light emitted by the second laser material is in the range of 580 nm to 700 nm (red light), the main peak wavelength of light emitted by the third laser material after being excited is in the range of 495 nm to 590 nm (green light). A laser material region of a certain light color can be combined with an electrode pattern to form a light emitting unit of a certain light color. For example, the combination of the blue laser material area and the electrode pattern can form a blue light-emitting unit UB; the combination of the red laser material area and the electrode pattern can form a red light-emitting unit UR; the combination of the green laser material area and the electrode pattern can form a green Lighting unit UG.

Likewise, according to the second embodiment, there are continuous blue, red and green laser materials in the blue, red and green laser material regions, respectively. As shown in FIG. 6 , the size of the light emitting unit UB/UR/UG (ie blue, red and green laser material regions) corresponds to the size of the pixel unit P. But this disclosure is not limited thereto.

In addition, as shown in the pixel arrangement shown in FIG. 6 , the pixel unit P of the second embodiment can also be regarded as a matrix arrangement of m columns (rows) and n rows (columns), where m and n are positive integers. For example, P2,n and P3,n respectively represent the pixel units in the second column (horizontal) and the third column, Pm,7, Pm,8 and Pm,9 respectively represent the pixel units in the seventh, eighth, and ninth rows, ... according to And so on. In the second embodiment, the pixel units in two adjacent columns (such as P2,n and P3,n) are arranged in parallel to each other, and the pixel units in two adjacent rows (such as Pm,7 and Pm,8) are arranged in a misplaced manner and their shapes are opposite up and down (i.e. inverted and equilateral triangles).

Furthermore, in the second embodiment, between adjacent pixel units in the same row, adjacent sub-pixels have the same light color. As shown in FIG. 6 , among pixel units in the same column, adjacent pixel units are adjacent to each other with at least one sub-pixel (/light-emitting portion) of the same light color. For example, in the second column, the pixel unit P2, 7 is adjacent to the adjacent pixel unit P2, 9 with a red sub-pixel (/light-emitting portion). Taking the red sub-pixels in the pixel units P2,7, P2,9 and P1,8 as an example, a red laser material is evaporated simultaneously by using an opening of the mask. Therefore, in the second embodiment, for pixel units in the same column, adjacent sub-pixels in adjacent pixel units are connected by at least one laser material of the same light color, for example, adjacent pixel units P2, 7 and P2, 9. Red laser materials are connected (i.e. laser materials of adjacent light-emitting parts between adjacent pixel units in the same column are connected).

According to the OLED proposed in the second embodiment, the resolution of the OLED product can be greatly improved, for example, about 400PPI, by utilizing the existing mask process capability.

third embodiment

FIG. 7 is a top view of a pixel arrangement of an organic electroluminescence display panel according to a third embodiment of the present disclosure. In the third embodiment, the shape of the electrode is quadrilateral/rhombic, the opening of the mask is triangular, and the shape of the formed pixel is polygonal. Furthermore, the sharp corners of the electrode shape can also be rounded.

In the organic electroluminescence display panel of the third embodiment, an electrode layer of an electrode pattern is formed on a substrate, and an organic material layer is formed on the electrode layer. The combination of the organic material layer and the electrode pattern forms several pixel units P. As shown in FIG. 7 , if they are distinguished by light color, several light _- emitting units U _R , U _G , and UB of the same light color may also be included. At least one of the pixel units P includes several sub-pixels of different light colors (such as red sub-pixels, green sub-pixels, and blue sub-pixels) arranged in Delta, and the sub-pixels of the same light color as adjacent pixel units also form a triangle arrangement. As shown in FIG. 7 , the light emitting units _UR , U _G , or _UB of the same light color include three light emitting portions 741 , and the three light emitting portions 741 of the same light color are also arranged in Delta.

Similar to the first embodiment, the third embodiment can use the same mask to combine the first laser material (such as blue laser material), the second laser material (such as red laser material) and the third laser material (such as green laser material) Evaporate in the openings of the mask in sequence (the sequence of light colors can be exchanged) to form laser material regions with different light colors. In the embodiment, the main peak wavelength of the light emitted by the first laser material after being excited is in the range of 380 nm to 495 nm (blue light), and the main peak wavelength of the light emitted by the second laser material is in the range of 580 nm to 700 nm (red light), the main peak wavelength of light emitted by the third laser material after being excited is in the range of 495 nm to 590 nm (green light). The combination of the blue laser material area and the electrode pattern can form a blue light-emitting unit UB, the combination of the red laser material area and the electrode pattern can form a red light-emitting unit UR, and the combination of the green laser material area and the electrode pattern can form a green light-emitting unit. Lighting unit UG. Likewise, according to the third embodiment, there are continuous blue, red and green laser materials in the blue, red and green laser material regions, respectively.

In addition, as shown in the pixel arrangement shown in FIG. 7 , the pixel unit P of the third embodiment can also be regarded as a matrix arrangement of m columns (rows) and n rows (columns), where m and n are positive integers. For example, P2,n and P3,n respectively represent the pixel units in the second column (horizontal) and the third column, Pm,7, Pm,8 and Pm,9 respectively represent the pixel units in the seventh, eighth, and ninth rows, ... according to And so on. In the third embodiment, the pixel units in two adjacent columns (such as P2,n and P3,n) are arranged in parallel to each other, and the pixel units in two adjacent rows (such as Pm,7 and Pm,8) are arranged in a misplaced manner and their shapes are opposite up and down .

Furthermore, in the third embodiment, between adjacent pixel units in the same column, adjacent sub-pixels have the same light color. As shown in FIG. 7 , among pixel units in the same column, adjacent pixel units are adjacent to each other with at least one sub-pixel (/light-emitting portion) of the same light color. For example, in the first column, the pixel unit P1, 7 is adjacent to the adjacent pixel unit P1, 9 with a red sub-pixel (/light-emitting portion). Taking the red sub-pixels in the pixel units P1,7, P1,9 and P2,8 as an example, a triangular opening of the mask is used to simultaneously vapor-deposit the red laser material. Therefore, in the third embodiment, for pixel units in the same column, adjacent sub-pixels in adjacent pixel units are connected by at least one laser material of the same light color, for example, adjacent pixel units P1, 7 in the same column are connected to P1 and 9 are connected with red laser materials (i.e. laser materials of adjacent light-emitting parts between adjacent pixel units in the same column are connected).

According to the OLED proposed in the third embodiment, the resolution of the OLED product can be greatly improved, for example, about 400PPI, by utilizing the existing mask process capability.

Fourth embodiment

FIG. 8 is a top view of a pixel arrangement of an organic electroluminescent display panel according to a fourth embodiment of the present disclosure. In the fourth embodiment, the shape of the electrodes is rectangular (square), the opening of the mask is rectangular (the size corresponds to three sub-pixels arranged in strips), and the shape of the formed pixels is polygonal (one square sub-pixel is in the other two square sub-pixels) side of the pixel). Furthermore, the sharp corners of the electrode shape can also be rounded.

In the organic electroluminescence display panel of the fourth embodiment, an electrode layer of an electrode pattern is formed on a substrate, and an organic material layer is formed on the electrode layer. The combination of the organic material layer and the electrode pattern forms several pixel units P. As shown in FIG. 8 , if it is distinguished by light color, several light _- emitting units U _R , U _G , and UB of the same light color may also be included. At least one of the pixel units P includes several sub-pixels of different light colors (such as red sub-pixels, green sub-pixels, and blue sub-pixels) arranged in delta, and sub-pixels of the same light color are arranged in straight lines. As shown in FIG. 8 , a light emitting unit of the same light color includes several light emitting portions 841 . In the fourth embodiment, the light-emitting units _UR , _UG , or UB of the same light color include three light _- emitting parts 841 arranged in straight bars.

Similar to the first embodiment, the fourth embodiment can use the same mask to combine the first laser material (such as blue laser material), the second laser material (such as red laser material) and the third laser material (such as green laser material) Evaporate in the openings of the mask in sequence (the sequence of light colors can be exchanged) to form laser material regions with different light colors. In the embodiment, the main peak wavelength of the light emitted by the first laser material after being excited is in the range of 380 nm to 495 nm (blue light), and the main peak wavelength of the light emitted by the second laser material is in the range of 580 nm to 700 nm (red light), the main peak wavelength of light emitted by the third laser material after being excited is in the range of 495 nm to 590 nm (green light). The combination of the blue laser material area and the electrode pattern can form a blue light-emitting unit UB, the combination of the red laser material area and the electrode pattern can form a red light-emitting unit UR, and the combination of the green laser material area and the electrode pattern can form a green light-emitting unit. Lighting unit UG. Likewise, according to the fourth embodiment, there are continuous blue, red and green laser materials in the blue, red and green laser material regions, respectively.

In addition, as shown in the pixel arrangement shown in FIG. 8 , the pixel units P of the fourth embodiment can also be regarded as a matrix arrangement of m columns and n rows, where m and n are positive integers. For example, P2,n and P3,n respectively represent the pixel units in the second column (horizontal) and the third column, Pm,7, Pm,8 and Pm,9 respectively represent the pixel units in the seventh, eighth, and ninth rows, ... according to And so on. In the fourth embodiment, the pixel units in two adjacent columns (such as P2,n and P3,n) are arranged parallel to each other, and the shapes of the pixel units in two adjacent rows (such as Pm,7 and Pm,8) are opposite up and down.

Furthermore, in the fourth embodiment, for pixel units in the same column, adjacent pixel units are adjacent to each other with two sub-pixels (/light-emitting parts) of the same light color (i.e. adjacent sub-pixels between adjacent pixel units in the same column (/light-emitting part) same light color). For example, in the second column, the pixel unit P2,7 is adjacent to the adjacent pixel unit P2,8 with red and blue sub-pixels (/light emitting parts). Taking the blue sub-pixels in the pixel units P2,7, P2,8 and P2,9 as an example, the blue laser material is evaporated at the same time by using a long strip opening of the mask; and the pixel units P2,6, P2, The red sub-pixels in 7 and P2, 8 are simultaneously vapor-deposited red laser material for a strip-shaped opening. Therefore, in the fourth embodiment, for pixel units in the same column, adjacent sub-pixels in adjacent pixel units are connected by two kinds of laser materials of the same light color (i.e. between adjacent pixel units in the same column, adjacent sub-pixels The laser material of the pixel (/light-emitting part) is connected).

According to the OLED proposed in the fourth embodiment, the resolution of the OLED product can be greatly improved, for example, about 400PPI, by using the existing mask process capability.

fifth embodiment

FIG. 9 is a top view of a pixel arrangement of an organic electroluminescent display panel according to a fifth embodiment of the present disclosure. In the fifth embodiment, the electrode shape is quadrilateral/diamond, the pixel shape is polygonal (one square sub-pixel is on the side of the other two square sub-pixels), and the mask opening corresponds to the pixel shape. Furthermore, the sharp corners of the electrode shape can also be rounded.

In the organic electroluminescence display panel of the fifth embodiment, an electrode layer of an electrode pattern is formed on a substrate, and an organic material layer is formed on the electrode layer. The combination of the organic material layer and the electrode pattern forms several pixel units P. As shown in FIG. 7 , if it is distinguished by light color, it may also include several light-emitting units UR, UG, and UB of the same light color. At least one of the pixel units P includes several sub-pixels of different light colors (such as red sub-pixels, green sub-pixels, and blue sub-pixels) arranged in Delta, and the sub-pixels of the same light color as adjacent pixel units also form a triangle arrangement. As shown in FIG. 9 , the light-emitting units UR, UG, or UB of the same light color include several light-emitting portions 941 (/sub-pixels), and the three light-emitting portions 941 of the same light color are also arranged in Delta.

Similar to the first embodiment, the fifth embodiment can use the same mask to combine the first laser material (such as blue laser material), the second laser material (such as red laser material) and the third laser material (such as green laser material) Evaporate in the openings of the mask in sequence (the sequence of light colors can be exchanged) to form laser material regions with different light colors. In the embodiment, the main peak wavelength of the light emitted by the first laser material after being excited is in the range of 380 nm to 495 nm (blue light), and the main peak wavelength of the light emitted by the second laser material is in the range of 580 nm to 700 nm (red light), the main peak wavelength of light emitted by the third laser material after being excited is in the range of 495 nm to 590 nm (green light). The combination of the blue laser material area and the electrode pattern can form a blue light-emitting unit UB, the combination of the red laser material area and the electrode pattern can form a red light-emitting unit UR, and the combination of the green laser material area and the electrode pattern can form a green light-emitting unit. Lighting unit UG. Likewise, according to the fifth embodiment, there are continuous blue, red and green laser materials in the blue, red and green laser material regions, respectively.

In addition, as shown in the pixel arrangement shown in FIG. 9 , the pixel units P of the fifth embodiment can also be regarded as a matrix arrangement of m columns and n rows, where m and n are positive integers. For example, P _2,n and P _3,n represent the pixel units in the second column (horizontal) and the third column respectively, P _m,7 , P _m,8 and P _m,9 represent the seventh, eighth, and ninth rows respectively Pixel units, ...and so on. In the fifth embodiment, the pixel units in two adjacent columns (such as P _2,n and P _3,n ) are arranged in parallel to each other, and the pixel units in two adjacent rows (such as P _m,7 and P _m,8 ) are arranged in a dislocation And the shape is up and down.

Furthermore, in the fifth embodiment, between adjacent pixel units in the same column, adjacent sub-pixels have the same light color. As shown in FIG. 9 , among pixel units in the same row, adjacent pixel units are adjacent to each other with sub-pixels (/light-emitting portions) of the same light color. For example, in the second column, the pixel unit P _2,7 is adjacent to the adjacent pixel unit P _2,9 with a green sub-pixel (/light-emitting portion). Taking the green sub-pixels in the pixel units P _2,7 , P _1,8 and P _2,9 as an example, the green laser material is evaporated simultaneously by using an opening of the mask. Therefore, in the fifth embodiment, for pixel units in the same column, adjacent sub-pixels in adjacent pixel units are connected with a laser material of the same light color, for example, adjacent pixel units P 2, ₇ in the same column are connected to P 2 and ₉ are connected with green laser materials (ie adjacent light emitting parts of adjacent pixel units in the same row are connected with laser materials).

According to the OLED proposed in the fifth embodiment, the resolution of the OLED product can be greatly improved, for example, about 400PPI, by using the existing mask process capability.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (9)

1. a kind of display panel, including：

One substrate；

One electrode layer, it is formed on the substrate, and there is an electrode pattern；

One organic material layer, it is formed on the electrode layer, the organic material layer combines with the electrode pattern forms several pixel lists Member, at least one is triangularly arranged the pixel cell including the photochromic sub-pixel of several differences and the sub-pixel, Same photochromic sub-pixel between the adjacent pixel cell is triangularly arranged, and is shared the same light described between the adjacent pixel cell There is a spacing (G between color sub-pixel_S), a spacing (G of photochromic sub-pixels different less than described in the pixel cell_P),

Wherein described pixel cell substantially into a rectangular arrangement,

Wherein direction of the pixel cell of adjacent rows along the row and Heterogeneous Permutation.

2. display panel as claimed in claim 1, it is characterised in that the pixel cells of adjacent two row are parallel to each other row Row, the shape of the pixel cell of adjacent rows are identical.

3. display panel as claimed in claim 1, it is characterised in that the pixel cell of adjacent rows descends phase in shape Instead.

4. display panel as claimed in claim 1, it is characterised in that described with photochromic time between the adjacent pixel cell There is pixel a laser material to be connected.

5. display panel as claimed in claim 1, it is characterised in that what the photochromic sub-pixel of the difference was sent after being stimulated The main peak ranges of wavelength of light are respectively 380 nanometers to 495 nanometers, 580 nanometers to 700 nanometers, 495 nanometers to 590 nanometers.

6. display panel as claimed in claim 5, it is characterised in that the main peak ranges of wavelength of light sent after being stimulated are The area of 380 nanometers to 495 nanometers of the sub-pixel is maximum.

7. display panel as claimed in claim 5, it is characterised in that the main peak ranges of wavelength of light sent after being stimulated are The area of 495 nanometers to 590 nanometers of the sub-pixel is minimum.

8. a kind of display panel, including：

One substrate；

One electrode layer, it is formed on the substrate, and there is an electrode pattern；

One organic material layer, it is formed on the electrode layer, the organic material layer combines with the electrode pattern forms several pixel lists Member, at least one is triangularly arranged the pixel cell including the photochromic sub-pixel of several differences and the sub-pixel, Same photochromic sub-pixel between the adjacent pixel cell arranges in vertical bar, described with photochromic between the adjacent pixel cell There is a spacing (G between sub-pixel_S), a spacing (G of photochromic sub-pixels different less than described in the pixel cell_P), wherein, The pixel cell is into a rectangular arrangement, and the pixel cell of adjacent two row or adjacent rows is parallel to each other, wherein adjacent Above and below the geometry of the pixel cell of two rows on the contrary, wherein between same row adjacent pixel unit, described at least three Adjacent sub-pixel is identical photochromic.

9. display panel as claimed in claim 8, it is characterised in that between same row adjacent pixel unit, described adjacent time Pixel has an identical photochromic laser material to be connected.