Pixel opening arrangement structure, high-precision metal mask plate and display device

Abstract

The invention provides a pixel opening arrangement structure, a high-precision metal mask plate and a display device, and belongs to the technical field of display. The pixel opening arrangement structure comprises a plurality of pixel opening repeating units which are arranged along a first direction, each pixel opening repeating unit comprises a first sub-pixel opening, a second sub-pixel opening, a third sub-pixel opening and a fourth sub-pixel opening, the first sub-pixel opening and the fourth sub-pixel opening are the same in shape and are symmetrically arranged relative to a first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form a surrounding structure; the second sub-pixel opening and the third sub-pixel opening are located in the surrounding structure, the second sub-pixel opening and the third sub-pixel opening are the same in shape and are symmetrically arranged relative to a second straight line, and the first straight line is perpendicular to the second straight line or coincides with the second straight line. The aperture opening ratio of the display device can be improved, and the brightness, the resolution ratio and the service life of an OLED display product can be improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a pixel opening arrangement structure, a high-precision metal mask and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display devices are one of the hot topics in the field of flat panel display research today. Compared with liquid crystal displays, OLED display devices have the advantages of low energy consumption, low production cost, self-luminescence, wide viewing angle and fast response speed. At present, in the field of flat panel displays such as mobile phones, PDAs, digital cameras, OLED display devices have begun to replace traditional liquid crystal displays (LCD).

[0003] The structure of an OLED display device mainly includes: a substrate, and sub-pixels arranged in a matrix on the substrate. Each sub-pixel is generally formed by using organic materials through evaporation film forming technology through a high-precision metal mask to form an organic electroluminescent structure at the corresponding sub-pixel position on the array substrate. With the gradual development of OLED display products, people have higher and higher requirements for display resolution. In order to achieve high-resolution display in the limited display area of ​​OLED display screens, some difficult-to-solve process problems are usually encountered, especially the evaporation process. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pixel opening arrangement structure, a high-precision metal mask and a display device, which can improve the aperture ratio of the display device and improve the brightness, resolution and life of OLED display products.

[0005] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0006] In one aspect, a pixel opening arrangement structure is provided, comprising a plurality of pixel opening repeating units arranged along a first direction; each of the pixel opening repeating units comprises a first sub-pixel opening, a second sub-pixel opening, a third sub-pixel opening and a fourth sub-pixel opening,

[0007] The first sub-pixel opening and the fourth sub-pixel opening have the same shape and are symmetrically arranged relative to the first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form a surrounding structure;

[0008] The second sub-pixel opening and the third sub-pixel opening are located inside the enclosing structure, the second sub-pixel opening and the third sub-pixel opening have the same shape and are symmetrically arranged relative to a second straight line, and the first straight line is perpendicular to the second straight line or the first straight line coincides with the second straight line.

[0009] In some embodiments, the first sub-pixel opening and the fourth sub-pixel opening define a rectangular surrounding structure;

[0010] The second sub-pixel opening and the third sub-pixel opening are both in axisymmetric shapes.

[0011] In some embodiments, the first sub-pixel opening and the fourth sub-pixel opening define a rectangular surrounding structure;

[0012] The second sub-pixel opening and the third sub-pixel opening are both circular or rectangular.

[0013] In some embodiments, the first sub-pixel opening includes a first portion, a second portion, and a third portion that are sequentially connected end to end, wherein the second portion is a long side or a short side of the rectangular enclosing structure.

[0014] In some embodiments, the first sub-pixel opening and the fourth sub-pixel opening are green sub-pixels, and the second sub-pixel opening and the third sub-pixel opening are respectively one of a blue sub-pixel and a red sub-pixel.

[0015] In some embodiments, the sum of the areas of the blue sub-pixel and the red sub-pixel is greater than the sum of the areas of the two green sub-pixels.

[0016] In some embodiments, the second sub-pixel opening is close to the first sub-pixel opening relative to the third sub-pixel opening, the third sub-pixel opening is close to the fourth sub-pixel opening relative to the second sub-pixel opening, the second sub-pixel opening and the first sub-pixel opening constitute a first pixel opening group, the third sub-pixel opening and the fourth sub-pixel opening constitute a second pixel opening group, the second sub-pixel opening is multiplexed as a sub-pixel of the second pixel opening group, and the third sub-pixel opening is multiplexed as a sub-pixel of the first pixel opening group.

[0017] An embodiment of the present invention also provides a high-precision metal mask plate for producing the pixel opening arrangement structure as described above, comprising: a plurality of mask plate components, each of the mask plate components comprising a plurality of opening areas, and the opening areas correspond to one of the shapes and positions of the first sub-pixel opening, the second sub-pixel opening, the third sub-pixel opening, and the fourth sub-pixel opening.

[0018] In some embodiments, the plurality of mask plate assemblies include a first mask plate for making the first sub-pixel opening and the fourth sub-pixel opening, and the first mask plate includes a plurality of first evaporation holes for evaporating the first sub-pixel opening and the fourth sub-pixel opening;

[0019] The plurality of mask plate assemblies further include a second mask plate for making the second sub-pixel opening and the third sub-pixel opening, and the second mask plate includes a plurality of second evaporation holes for evaporating the second sub-pixel opening or the third sub-pixel opening.

[0020] An embodiment of the present invention further provides a display device, comprising the pixel opening arrangement structure as described above.

[0021] The embodiments of the present invention have the following beneficial effects:

[0022] In the above scheme, the first sub-pixel opening and the fourth sub-pixel opening have the same shape and are symmetrically arranged relative to the first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form an enclosing structure; the second sub-pixel opening and the third sub-pixel opening are located inside the enclosing structure, and the second sub-pixel opening and the third sub-pixel opening have the same shape and are symmetrically arranged relative to the second straight line; by adopting the above-mentioned pixel opening arrangement structure, the opening area of ​​the high-precision metal mask plate for manufacturing the pixel arrangement structure can be larger, thereby improving the aperture ratio of the display device, and improving the brightness and life of the OLED product; in addition, the opening area of ​​the high-precision metal mask plate is enlarged, which can reduce the difficulty of the preparation process, improve the pixel distribution density, and achieve high-pixel display; in addition, the second sub-pixel opening and the third sub-pixel opening have the same shape, so the second sub-pixel opening and the third sub-pixel opening can be prepared with the same high-precision metal mask plate, which can save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 and Figure 2 A schematic diagram of a pixel opening arrangement structure according to an embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a first mask plate in Embodiment 1 of the present invention;

[0025] Figure 4 is a schematic diagram of a second mask plate in Embodiment 1 of the present invention;

[0026] Figure 5 A schematic diagram of a second pixel opening arrangement structure according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a second mask plate in the second embodiment of the present invention;

[0028] Figure 7 A schematic diagram of a three-pixel opening arrangement structure according to an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of a first mask plate in Embodiment 3 of the present invention;

[0030] Fig. 9Schematic diagram of a four-pixel opening arrangement structure according to an embodiment of the present invention.

[0031] Reference numerals

[0032] 100, 200, 300, 400 pixel arrangement structure

[0033] 101, 201, 301, 401 first sub-pixel opening

[0034] 102, 202, 302, 402 second sub-pixel opening

[0035] 103, 203, 303, 403 third sub-pixel opening

[0036] 104, 204, 304, 404 fourth sub-pixel opening

[0037] 10, 40 First mask

[0038] 11, 41 First evaporation hole

[0039] 20, 30 Second mask

[0040] 21, 31 Second evaporation hole DETAILED DESCRIPTION

[0041] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0042] In order to improve the resolution of display products, the Pentile pixel arrangement has been used more and more widely. In the Pentile pixel arrangement, the area of ​​the R (red) sub-pixel and the B (blue) sub-pixel is twice that of the G (green) sub-pixel, the G sub-pixels are evenly arranged at equal intervals, the R sub-pixels and the B sub-pixels are staggered, and each R sub-pixel and B sub-pixel is reused by two G sub-pixels located on the two adjacent sides. However, in the Pentile pixel arrangement, due to the high density of the G sub-pixels, the aperture ratio of the R sub-pixels or the B sub-pixels is low, and the aperture ratio of the R sub-pixels and the evaporation process deviation cannot be well balanced, which greatly limits the improvement of the resolution of the OLED display screen, resulting in the OLED pixel arrangement scheme having problems such as small luminous area, low aperture ratio, and product brightness that cannot meet requirements.

[0043] The embodiments of the present invention provide a pixel opening arrangement structure, a high-precision metal mask and a display device, which can improve the aperture ratio of the display device and improve the brightness, resolution and life of OLED display products.

[0044] An embodiment of the present invention provides a pixel opening arrangement structure, comprising a plurality of pixel opening repeating units arranged along a first direction; each of the pixel opening repeating units comprises a first sub-pixel opening, a second sub-pixel opening, a third sub-pixel opening and a fourth sub-pixel opening,

[0045] The first sub-pixel opening and the fourth sub-pixel opening have the same shape and are symmetrically arranged relative to the first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form a surrounding structure;

[0046] The second sub-pixel opening and the third sub-pixel opening are located inside the enclosing structure, the second sub-pixel opening and the third sub-pixel opening have the same shape and are symmetrically arranged relative to a second straight line, and the first straight line is perpendicular to the second straight line or the first straight line coincides with the second straight line.

[0047] Among them, the first straight line is located between the first sub-pixel opening and the fourth sub-pixel opening, and does not overlap with the first sub-pixel opening and the fourth sub-pixel opening, and the second straight line is located between the second sub-pixel opening and the third sub-pixel opening, and does not overlap with the second sub-pixel opening and the third sub-pixel opening.

[0048] The above-mentioned surrounding structure can be frame-shaped or match the edge shape of the second sub-pixel opening and the third sub-pixel opening. In some embodiments, the first sub-pixel opening and the fourth sub-pixel opening define a rectangular surrounding structure; the second sub-pixel opening and the third sub-pixel opening are both axially symmetrical.

[0049] In the present embodiment, the first sub-pixel opening and the fourth sub-pixel opening have the same shape and are symmetrically arranged relative to the first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form an enclosing structure; the second sub-pixel opening and the third sub-pixel opening are located inside the enclosing structure, and the second sub-pixel opening and the third sub-pixel opening have the same shape and are symmetrically arranged relative to the second straight line; by adopting the above-mentioned pixel opening arrangement structure, the opening area of ​​the high-precision metal mask plate for manufacturing the pixel arrangement structure can be larger, thereby improving the aperture ratio of the display device, and improving the brightness and life of the OLED product; in addition, the opening area of ​​the high-precision metal mask plate is enlarged, which can reduce the difficulty of the preparation process, improve the pixel distribution density, and achieve high-pixel display; in addition, the second sub-pixel opening and the third sub-pixel opening have the same shape, so the second sub-pixel opening and the third sub-pixel opening can be prepared with the same high-precision metal mask plate, which can save production costs.

[0050] In this embodiment, in order to achieve color display, the first sub-pixel opening and the fourth sub-pixel opening are green sub-pixels, and the second sub-pixel opening and the third sub-pixel opening are respectively a blue sub-pixel and a red sub-pixel.

[0051] Since the lifespan and luminous efficiency of organic materials that emit blue light are lower than those of organic materials that emit red and green light, in this embodiment, the sum of the areas of the blue sub-pixel and the red sub-pixel is greater than the sum of the areas of the two green sub-pixels, thereby ensuring the luminous efficiency of the blue light.

[0052] An embodiment of the present invention also provides a high-precision metal mask plate for producing the pixel opening arrangement structure as described above, comprising: a plurality of mask plate components, each of the mask plate components comprising a plurality of opening areas, and the opening areas correspond to one of the shapes and positions of the first sub-pixel opening, the second sub-pixel opening, the third sub-pixel opening, and the fourth sub-pixel opening.

[0053] In some embodiments, the plurality of mask plate assemblies include a first mask plate for making the first sub-pixel opening and the fourth sub-pixel opening, and the first mask plate includes a plurality of first evaporation holes for evaporating the first sub-pixel opening and the fourth sub-pixel opening;

[0054] The plurality of mask plate assemblies further include a second mask plate for making the second sub-pixel opening and the third sub-pixel opening, and the second mask plate includes a plurality of second evaporation holes for evaporating the second sub-pixel opening or the third sub-pixel opening.

[0055] In this embodiment, the second sub-pixel opening and the third sub-pixel opening have the same shape, so the second sub-pixel opening and the third sub-pixel opening can be prepared using the same high-precision metal mask, which can save production costs.

[0056] The first direction may be a row direction, and the second direction may be a column direction. Taking the first direction as the row direction and the second direction as the column direction as an example, in the first specific embodiment, Figure 1As shown, the pixel opening arrangement structure 100 includes a plurality of pixel opening repeating units arranged along the row direction (a pixel opening repeating unit is shown in the dotted box); each of the pixel opening repeating units includes a first sub-pixel opening 101, a second sub-pixel opening 102, a third sub-pixel opening 103 and a fourth sub-pixel opening 104, and the first sub-pixel opening 101 and the fourth sub-pixel opening 104 have the same structure, are semi-enclosed structures, and are symmetrically arranged; the second sub-pixel opening 102 and the third sub-pixel opening 103 have the same structure, are rectangular structures, and are symmetrically arranged. The enclosed structure composed of the first sub-pixel opening 101 and the fourth sub-pixel opening 104 contains a second sub-pixel opening 102 and a third sub-pixel opening 103 inside, and the first sub-pixel opening 101 and the fourth sub-pixel opening 104 include a first part B1, a second part B2 and a third part B3 arranged in sequence, wherein the second part B2 is the short side of the enclosed structure. In this embodiment, the first sub-pixel opening 101 and the fourth sub-pixel opening 104 are green sub-pixels, the second sub-pixel opening 102 is a red sub-pixel, and the third sub-pixel opening 103 is a blue sub-pixel.

[0057] In this embodiment, the symmetrically arranged sub-pixel openings have the same shape and can be prepared using the same high-precision metal mask, thereby saving production costs.

[0058] In the pixel arrangement structure of the present embodiment, the first sub-pixel opening 101 and the second sub-pixel opening 102 form a first pixel opening group, and the third sub-pixel opening 103 and the fourth sub-pixel opening 104 form a second pixel opening group. The second sub-pixel opening 102 and the third sub-pixel opening 103 can be reused. For example, when the pixel composed of the first sub-pixel opening 101 and the second sub-pixel opening 102 is to display standard white, the adjacent third sub-pixel opening 103 can be used to form three primary colors to achieve a white effect; when the pixel composed of the third sub-pixel opening 103 and the fourth sub-pixel opening 104 is to display standard white, the adjacent second sub-pixel opening 102 can be used to form three primary colors to achieve a white effect.

[0059] like Figure 1 As shown, the pixel arrangement structure of this embodiment includes a plurality of pixel opening repeating units, and the plurality of pixel opening repeating units are repeatedly arranged along the row direction and the column direction.

[0060] In this embodiment, the positions of the red sub-pixel and the blue sub-pixel can also be swapped, such as Figure 2 shown.

[0061] Figure 3The structure diagram of the first mask plate 10 for making the first sub-pixel opening 101 and the fourth sub-pixel opening 104 is shown. When the first sub-pixel opening 101 and the fourth sub-pixel opening 104 need to be evaporated with the corresponding luminescent material, the evaporation of the first sub-pixel opening 101 and the fourth sub-pixel opening 104 is completed by the high-precision metal mask plate of the first sub-pixel opening 101 and the fourth sub-pixel opening 104 in cooperation with the evaporation source. The mask plate of the first sub-pixel opening 101 and the fourth sub-pixel opening 104 is the first mask plate 10. The first mask plate 10 includes a plurality of first evaporation holes 11 arranged in the row direction and the column direction. The first evaporation holes 11 correspond to at least two adjacent first sub-pixel openings 101 in the row direction. Among them, the edge line of the first evaporation hole 11 matches the edge line of the corresponding first sub-pixel opening 101, that is, the edge line of the first evaporation hole 11 and the edge line of the corresponding first sub-pixel opening 101 have the same shape and similar size, which is due to the existence of the mask shadow, so the edge line of the first evaporation hole 11 and the edge line of the corresponding first sub-pixel opening 101 are different in size. During evaporation, the luminescent material of the first sub-pixel opening 101 can pass through the first evaporation hole 11 and fall into the opening area of ​​at least two adjacent first sub-pixel openings 101 at the same time to form the luminescent layer of the first sub-pixel opening 101. Similarly, the edge line of the first evaporation hole 11 matches the edge line of the corresponding fourth sub-pixel opening 104, that is, the edge line of the first evaporation hole 11 and the edge line of the corresponding fourth sub-pixel opening 104 have the same shape and similar size, which is due to the existence of the mask shadow, so the edge line of the first evaporation hole 11 and the edge line of the corresponding fourth sub-pixel opening 104 are different in size. During evaporation, the light-emitting material of the fourth sub-pixel opening 104 can pass through the first evaporation hole 11 and fall into the opening areas of at least two adjacent fourth sub-pixel openings 104 to form a light-emitting layer of the fourth sub-pixel opening 104 .

[0062] Figure 4The structure diagram of the second mask plate 20 for making the second sub-pixel opening 102 and the third sub-pixel opening 103 is shown. The second mask plate 20 can be used to make one of the second sub-pixel opening 102 and the third sub-pixel opening 103 first, and then the second mask plate 20 can be used to make the other of the second sub-pixel opening 102 and the third sub-pixel opening 103. When the second sub-pixel opening 102 or the third sub-pixel opening 103 needs to be evaporated with the corresponding luminescent material, the second mask plate 20 of the second sub-pixel opening 102 or the third sub-pixel opening 103 cooperates with the evaporation source to complete the evaporation of the second sub-pixel opening 102 or the third sub-pixel opening 103. The mask plate of the second sub-pixel opening 102 and the third sub-pixel opening 103 is the second mask plate 20, and the second mask plate 20 includes a plurality of second evaporation holes 21 arranged along the row direction and the column direction. The edge line of the second evaporation hole 21 matches the edge line of the corresponding second sub-pixel opening 102 and the third sub-pixel opening 103, that is, the edge line of the second evaporation hole 21 has the same shape and similar size as the edge line of the corresponding second sub-pixel opening 102 or the third sub-pixel opening 103. This is because the shadow of the mask template exists, so the edge line of the second evaporation hole 21 is different in size from the edge line of the corresponding second sub-pixel opening 102 or the third sub-pixel opening 103. During evaporation, the light-emitting material of the second sub-pixel opening 102 or the third sub-pixel opening 103 can pass through the second evaporation hole 21 and fall into the opening area of ​​at least two adjacent second sub-pixel openings 102 or the third sub-pixel opening 103 at the same time, forming the light-emitting layer of the second sub-pixel opening 102 or the third sub-pixel opening 103.

[0063] In the second specific embodiment, Figure 5 As shown, the pixel opening arrangement structure 200 includes a plurality of pixel opening repeating units arranged along the row direction (a pixel opening repeating unit is shown in the dotted box); each of the pixel opening repeating units includes a first sub-pixel opening 201, a second sub-pixel opening 202, a third sub-pixel opening 203 and a fourth sub-pixel opening 204, and the first sub-pixel opening 201 and the fourth sub-pixel opening 204 have the same structure, are semi-enclosed structures, and are symmetrically arranged; the second sub-pixel opening 202 and the third sub-pixel opening 203 have the same structure, are circular structures, and are symmetrically arranged. The enclosed structure composed of the first sub-pixel opening 201 and the fourth sub-pixel opening 204 contains a second sub-pixel opening 202 and a third sub-pixel opening 203 inside, and the first sub-pixel opening 201 and the fourth sub-pixel opening 204 include a first part B1, a second part B2 and a third part B3 arranged in sequence, wherein the second part B2 is the short side of the enclosed structure. In this embodiment, the first sub-pixel opening 201 and the fourth sub-pixel opening 204 are green sub-pixels, the second sub-pixel opening 202 is a red sub-pixel, and the third sub-pixel opening 203 is a blue sub-pixel.

[0064] In this embodiment, the symmetrically arranged sub-pixel openings have the same shape and can be prepared using the same high-precision metal mask, thereby saving production costs.

[0065] In the pixel arrangement structure of the present embodiment, the first sub-pixel opening 201 and the second sub-pixel opening 202 form a first pixel opening group, and the third sub-pixel opening 203 and the fourth sub-pixel opening 204 form a second pixel opening group. The second sub-pixel opening 202 and the third sub-pixel opening 203 can be reused. For example, when the pixel composed of the first sub-pixel opening 201 and the second sub-pixel opening 202 is to display standard white, the adjacent third sub-pixel opening 203 can be used to form three primary colors to achieve a white effect; when the pixel composed of the third sub-pixel opening 203 and the fourth sub-pixel opening 204 is to display standard white, the adjacent second sub-pixel opening 202 can be used to form three primary colors to achieve a white effect.

[0066] like Figure 5 As shown, the pixel arrangement structure of this embodiment includes a plurality of pixel opening repeating units, and the plurality of pixel opening repeating units are repeatedly arranged along the row direction and the column direction.

[0067] Figure 6The structure diagram of the second mask plate 30 for making the second sub-pixel opening 202 and the third sub-pixel opening 203 is shown. The second mask plate 30 can be used to make one of the second sub-pixel opening 202 and the third sub-pixel opening 203 first, and then the second mask plate 30 can be used to make the other of the second sub-pixel opening 202 and the third sub-pixel opening 203. When the second sub-pixel opening 202 or the third sub-pixel opening 203 needs to be evaporated with the corresponding luminescent material, the second mask plate 30 of the second sub-pixel opening 202 or the third sub-pixel opening 203 cooperates with the evaporation source to complete the evaporation of the second sub-pixel opening 202 or the third sub-pixel opening 203. The mask plate of the second sub-pixel opening 202 and the third sub-pixel opening 203 is the second mask plate 30, and the second mask plate 30 includes a plurality of second evaporation holes 31 arranged along the row direction and the column direction. The edge line of the second evaporation hole 31 matches the edge line of the corresponding second sub-pixel opening 202 and the third sub-pixel opening 203, that is, the edge line of the second evaporation hole 31 has the same shape and similar size as the edge line of the corresponding second sub-pixel opening 202 or the third sub-pixel opening 203. This is because the shadow of the mask template exists, so the edge line of the second evaporation hole 31 is different in size from the edge line of the corresponding second sub-pixel opening 202 or the third sub-pixel opening 203. During evaporation, the light-emitting material of the second sub-pixel opening 202 or the third sub-pixel opening 203 can pass through the second evaporation hole 31 and fall into the opening area of ​​at least two adjacent second sub-pixel openings 202 or the third sub-pixel openings 203 at the same time, forming the light-emitting layer of the second sub-pixel opening 202 or the third sub-pixel opening 203.

[0068] In the specific embodiment 3, Figure 7 As shown, the pixel opening arrangement structure 300 includes a plurality of pixel opening repeating units arranged along the row direction (a pixel opening repeating unit is shown in the dotted box); each of the pixel opening repeating units includes a first sub-pixel opening 301, a second sub-pixel opening 302, a third sub-pixel opening 303 and a fourth sub-pixel opening 304, and the first sub-pixel opening 301 and the fourth sub-pixel opening 304 have the same structure, are semi-enclosed structures, and are symmetrically arranged; the second sub-pixel opening 302 and the third sub-pixel opening 303 have the same structure, are rectangular structures, and are symmetrically arranged. The enclosed structure composed of the first sub-pixel opening 301 and the fourth sub-pixel opening 304 contains a second sub-pixel opening 302 and a third sub-pixel opening 303, and the first sub-pixel opening 301 and the fourth sub-pixel opening 304 include a first part B1, a second part B2 and a third part B3 arranged in sequence, wherein the second part B2 is the long side of the enclosed structure. In this embodiment, the first sub-pixel opening 301 and the fourth sub-pixel opening 304 are green sub-pixels, the second sub-pixel opening 302 is a red sub-pixel, and the third sub-pixel opening 303 is a blue sub-pixel.

[0069] In this embodiment, the symmetrically arranged sub-pixel openings have the same shape and can be prepared using the same high-precision metal mask, thereby saving production costs.

[0070] In the pixel arrangement structure of the present embodiment, the first sub-pixel opening 301 and the second sub-pixel opening 302 form a first pixel opening group, and the third sub-pixel opening 303 and the fourth sub-pixel opening 304 form a second pixel opening group. The second sub-pixel opening 302 and the third sub-pixel opening 303 can be reused. For example, when the pixel composed of the first sub-pixel opening 301 and the second sub-pixel opening 302 is to display standard white, the adjacent third sub-pixel opening 303 can be used to form three primary colors to achieve a white effect; when the pixel composed of the third sub-pixel opening 303 and the fourth sub-pixel opening 304 is to display standard white, the adjacent second sub-pixel opening 302 can be used to form three primary colors to achieve a white effect.

[0071] like Figure 7 As shown, the pixel arrangement structure of this embodiment includes a plurality of pixel opening repeating units, and the plurality of pixel opening repeating units are repeatedly arranged along the row direction and the column direction.

[0072] Figure 8The structure schematic diagram of the first mask plate 40 for making the first sub-pixel opening 301 and the fourth sub-pixel opening 304 is shown. When the first sub-pixel opening 301 and the fourth sub-pixel opening 304 need to be evaporated with the corresponding luminescent material, the evaporation of the first sub-pixel opening 301 and the fourth sub-pixel opening 304 is completed by the high-precision metal mask plate of the first sub-pixel opening 301 and the fourth sub-pixel opening 304 in cooperation with the evaporation source. The mask plate of the first sub-pixel opening 301 and the fourth sub-pixel opening 304 is the first mask plate 40. The first mask plate 40 includes a plurality of first evaporation holes 41 arranged in the row direction and the column direction. The first evaporation holes 41 correspond to at least two adjacent first sub-pixel openings 301 in the row direction. Among them, the edge line of the first evaporation hole 41 matches the edge line of the corresponding first sub-pixel opening 301, that is, the edge line of the first evaporation hole 41 and the edge line of the corresponding first sub-pixel opening 301 have the same shape and similar size, which is due to the existence of the mask shadow, so the edge line of the first evaporation hole 41 and the edge line of the corresponding first sub-pixel opening 301 are different in size. During evaporation, the luminescent material of the first sub-pixel opening 301 can pass through the first evaporation hole 41 and fall into the opening area of ​​at least two adjacent first sub-pixel openings 301 at the same time, forming the luminescent layer of the first sub-pixel opening 301. Similarly, the edge line of the first evaporation hole 41 matches the edge line of the corresponding fourth sub-pixel opening 304, that is, the edge line of the first evaporation hole 41 and the edge line of the corresponding fourth sub-pixel opening 304 have the same shape and similar size, which is due to the existence of the mask shadow, so the edge line of the first evaporation hole 41 and the edge line of the corresponding fourth sub-pixel opening 304 are different in size. During evaporation, the light-emitting material of the fourth sub-pixel opening 304 can pass through the first evaporation hole 41 and fall into the opening areas of at least two adjacent fourth sub-pixel openings 304 to form a light-emitting layer of the fourth sub-pixel opening 304 .

[0073] In the specific embodiment 4, Fig. 9As shown, the pixel opening arrangement structure 400 includes a plurality of pixel opening repeating units arranged along the row direction (a pixel opening repeating unit is shown in the dotted box); each of the pixel opening repeating units includes a first sub-pixel opening 401, a second sub-pixel opening 402, a third sub-pixel opening 403 and a fourth sub-pixel opening 404, and the first sub-pixel opening 401 and the fourth sub-pixel opening 404 have the same structure, are semi-enclosed structures, and are symmetrically arranged; the second sub-pixel opening 402 and the third sub-pixel opening 403 have the same structure, are circular structures, and are symmetrically arranged. The enclosed structure composed of the first sub-pixel opening 401 and the fourth sub-pixel opening 404 contains a second sub-pixel opening 402 and a third sub-pixel opening 403 inside, and the first sub-pixel opening 401 and the fourth sub-pixel opening 404 include a first part B1, a second part B2 and a third part B3 arranged in sequence, wherein the second part B2 is the long side of the enclosed structure. In this embodiment, the first sub-pixel opening 401 and the fourth sub-pixel opening 404 are green sub-pixels, the second sub-pixel opening 402 is a red sub-pixel, and the third sub-pixel opening 403 is a blue sub-pixel.

[0074] In this embodiment, the symmetrically arranged sub-pixel openings have the same shape and can be prepared using the same high-precision metal mask, thereby saving production costs.

[0075] In the pixel arrangement structure of the present embodiment, the first sub-pixel opening 401 and the second sub-pixel opening 402 form a first pixel opening group, and the third sub-pixel opening 403 and the fourth sub-pixel opening 404 form a second pixel opening group. The second sub-pixel opening 402 and the third sub-pixel opening 403 can be reused. For example, when the pixel composed of the first sub-pixel opening 401 and the second sub-pixel opening 402 is to display standard white, the adjacent third sub-pixel opening 403 can be used to form three primary colors to achieve a white effect; when the pixel composed of the third sub-pixel opening 403 and the fourth sub-pixel opening 404 is to display standard white, the adjacent second sub-pixel opening 402 can be used to form three primary colors to achieve a white effect.

[0076] like Fig. 9 As shown, the pixel arrangement structure of this embodiment includes a plurality of pixel opening repeating units, and the plurality of pixel opening repeating units are repeatedly arranged along the row direction and the column direction.

[0077] The pixel arrangement structure of this embodiment can make the opening area of ​​the high-precision metal mask for manufacturing the pixel arrangement structure larger, thereby improving the aperture ratio of the display device and increasing the brightness and life of the OLED product.

[0078] An embodiment of the present invention further provides a display device, comprising the pixel opening arrangement structure as described above.

[0079] The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less of the above-mentioned components, or a combination of certain components, or different component arrangements. In an embodiment of the present invention, the display device includes but is not limited to a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0080] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.

[0081] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0082] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0083] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0084] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0085] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0086] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A pixel opening arrangement structure, characterized in that: It includes a plurality of pixel opening repeating units arranged along a first direction; each of the pixel opening repeating units includes a first sub-pixel opening, a second sub-pixel opening, a third sub-pixel opening and a fourth sub-pixel opening, The first sub-pixel opening and the fourth sub-pixel opening have the same shape and are symmetrically arranged relative to the first straight line, and the first sub-pixel opening and the fourth sub-pixel opening form a surrounding structure; The second sub-pixel opening and the third sub-pixel opening are located inside the enclosing structure, the second sub-pixel opening and the third sub-pixel opening have the same shape and are symmetrically arranged relative to a second straight line, and the first straight line is perpendicular to the second straight line or the first straight line coincides with the second straight line.

2. The pixel opening arrangement structure according to claim 1, characterized in that: The first sub-pixel opening and the fourth sub-pixel opening define a rectangular surrounding structure; The second sub-pixel opening and the third sub-pixel opening are both in axisymmetric shapes.

3. The pixel opening arrangement structure according to claim 2, characterized in that: The second sub-pixel opening and the third sub-pixel opening are both circular or rectangular.

4. The pixel opening arrangement structure according to claim 2 or 3, characterized in that: The first sub-pixel opening includes a first portion, a second portion and a third portion which are sequentially connected end to end, wherein the second portion is a long side or a short side of the rectangular enclosing structure.

5. The pixel opening arrangement structure according to claim 1, wherein: The first sub-pixel opening and the fourth sub-pixel opening are green sub-pixels, and the second sub-pixel opening and the third sub-pixel opening are blue sub-pixels and red sub-pixels, respectively.

6. The pixel opening arrangement structure according to claim 5, characterized in that: The sum of the areas of the blue sub-pixel and the red sub-pixel is greater than the sum of the areas of the two green sub-pixels.

7. The pixel opening arrangement structure according to claim 5, characterized in that: The second sub-pixel opening is close to the first sub-pixel opening relative to the third sub-pixel opening, and the third sub-pixel opening is close to the fourth sub-pixel opening relative to the second sub-pixel opening. The second sub-pixel opening and the first sub-pixel opening constitute a first pixel opening group, and the third sub-pixel opening and the fourth sub-pixel opening constitute a second pixel opening group. The second sub-pixel opening is multiplexed as a sub-pixel of the second pixel opening group, and the third sub-pixel opening is multiplexed as a sub-pixel of the first pixel opening group.

8. A high-precision metal mask for making the pixel opening arrangement structure according to any one of claims 1 to 7, characterized in that: include: A plurality of mask components, each of which comprises a plurality of opening areas, wherein the opening areas correspond to one of the shapes and positions of the first sub-pixel opening, the second sub-pixel opening, the third sub-pixel opening and the fourth sub-pixel opening.

9. The high-precision metal mask according to claim 8, characterized in that: The plurality of mask plate assemblies include a first mask plate for making the first sub-pixel opening and the fourth sub-pixel opening, and the first mask plate includes a plurality of first evaporation holes for evaporating the first sub-pixel opening and the fourth sub-pixel opening; The plurality of mask plate assemblies further include a second mask plate for making the second sub-pixel opening and the third sub-pixel opening, and the second mask plate includes a plurality of second evaporation holes for evaporating the second sub-pixel opening or the third sub-pixel opening.

10. A display device, characterized in that: It comprises a pixel opening arrangement structure as described in any one of claims 1 to 7.

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