Display panel and display device
By setting a long blank area in the second area of the display panel to reduce the number of exposures, the film pattern differences and brightness uneven caused by multiple exposures in some areas in the display panel are solved, and a more uniform display effect is achieved.
Patent Information
- Application Number
- CN202323389898.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-12
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2033-12-12
AI Technical Summary
Some areas in the display panel have been exposed multiple times, resulting in different film patterns from other areas, resulting in large differences in brightness and uneven display problems.
In the second area, the length direction of the blank area is in the second direction, the width direction is in the first direction, and the width is greater than the adjacent signal lines and the light emitting unit in the first and third areas. distance, thereby reducing the number of exposures.
By reducing the number of exposures, the film pattern difference is avoided, the brightness uniformity of the display panel is improved, and the problem of uneven display is solved.
Smart Images
Figure CN222515505U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure relate to the field of display technology, and in particular to a display panel and a display device. Background Art
[0002] Display devices have a wide range of application scenarios in life, such as mobile phones, tablet computers and other electronic devices. Display panels are an important component of display devices.
[0003] In the related art, the display panel includes a stacked display backplane and a light-emitting functional layer. In the process of manufacturing the display panel, a mask is required to be used to expose and develop on the display backplane. However, due to the small area of the mask, the display panel needs to be divided into a connected first area, a splicing area, and a second area by splicing to achieve the production of a large-size display panel. For example, one mask is used to expose in the first area and the splicing area, and another mask is used to expose in the second area and the splicing area, that is, the splicing area is exposed twice.
[0004] However, since the splicing area has been exposed twice, in the same film layer, the pattern of part of the film layer in the splicing area is different from the pattern of part of the film layer in the non-splicing area (i.e., the first area and the second area). As a result, the luminous brightness of the multiple light-emitting units located in the splicing area is significantly different from that of the multiple light-emitting units located in the non-splicing area, resulting in an uneven display problem in the display panel. Utility Model Content
[0005] The embodiments of the present disclosure provide a display panel and a display device, which can improve the problem of uneven display on the display panel caused by a large difference in brightness between a certain area of the display panel and other areas due to multiple exposures. The technical solution is as follows:
[0006] On the one hand, a display panel is provided, which includes a stacked display backplane and a light-emitting functional layer, the display backplane has a first area, a second area and a third area connected in sequence in a first direction, the length of the second area is greater than half of the width of the display panel, the light-emitting functional layer includes a plurality of light-emitting units distributed in an array, the light-emitting units include a first electrode, a light-emitting layer and a second electrode stacked in sequence on the first surface of the display backplane; the display backplane includes a plurality of first signal lines, the plurality of first signal lines extend along a second direction, the second direction intersects with the first direction, and each of the first signal lines is used to control the brightness of at least one of the light-emitting units; the second area includes a blank area, the plurality of first signal lines and the first electrodes of the plurality of light-emitting units are all located outside the blank area, the blank area is in a long strip shape, the length direction of the blank area is the second direction, the width direction of the blank area is the first direction, and the width of the blank area is greater than the distance between two adjacent first signal lines in the first area and the third area and greater than the distance between two adjacent first electrodes of the light-emitting units in the first area and the third area.
[0007] Optionally, the distribution density of the light-emitting units in the first region is greater than the distribution density of the light-emitting units in the second region, and the distribution density of the light-emitting units in the first region is equal to the distribution density of the light-emitting units in the third region; the distance between two adjacent first signal lines located in the first region is less than the distance between two adjacent first signal lines located in the second region, and the distance between two adjacent first signal lines located in the first region is equal to the distance between two adjacent first signal lines located in the third region.
[0008] Optionally, the distribution density of the light emitting units in the second area gradually increases from a central area to an edge area of the second area.
[0009] Optionally, the width of the blank area ranges from 5 μm to 10 μm.
[0010] Optionally, in the first direction, a ratio of a distance between two adjacent first electrodes located in the second region to a distance between two adjacent first electrodes located in the first region is 5:1 to 20:1.
[0011] Optionally, a ratio of a distance between two adjacent first signal lines located in the second region to a distance between two adjacent first signal lines located in the first region is 5:1 to 20:1.
[0012] Optionally, the first signal line is electrically connected to first electrodes of a plurality of the light emitting units arranged along the second direction.
[0013] Optionally, the display backplane further includes a plurality of pixel driving circuits, the plurality of pixel driving circuits are connected to the plurality of light-emitting units in a one-to-one correspondence, and each of the first signal lines is electrically connected to at least one of the pixel driving circuits.
[0014] Optionally, the display backplane is a silicon-based driving backplane.
[0015] On the other hand, a display device is provided. The display device includes a power supply circuit and any one of the above-mentioned display panels, wherein the power supply circuit supplies power to the display panel.
[0016] Optionally, the display device also includes a control circuit, which is electrically connected to the display panel and configured to provide a first voltage to first signal lines corresponding to multiple first light-emitting units, and provide a second voltage to second signal lines corresponding to multiple second light-emitting units, the first light-emitting units and the first signal lines corresponding to the first light-emitting units are located in the second area, the second light-emitting units and the first signal lines corresponding to the second light-emitting units are located in the first area or the third area, and the first voltage is greater than the second voltage, so that the brightness of the light-emitting units within a unit area of the second area is the same as the brightness of the light-emitting units within a unit area of the first area and the third area.
[0017] The beneficial effects brought by the technical solution provided by the present disclosure include at least: by setting a long blank area in the second area, the length direction of the blank area is the second direction, the width direction is the first direction, and the width of the blank area is greater than the distance between two adjacent first signal lines in the first area and the third area and greater than the distance between two adjacent light-emitting units in the first area and the third area, so that in the process of making a display panel, a mask plate can be used to make the film layer pattern of the first area and part of the second area, and another mask plate can be used to make the film layer pattern of another part of the second area and the third area. The problem that the film layer pattern of a part of the display panel is different from the film layer pattern of other areas due to multiple exposures is improved, thereby improving the problem of large brightness difference between the area and other areas in the display panel, that is, uneven display. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present disclosure;
[0020] Figure 2 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure;
[0021] Figure 3 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present disclosure;
[0022] Figure 4 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure;
[0023] Figure 5 It is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present disclosure.
[0024] Legend:
[0025] 100, display backplane A, first area B, second area B1, first sub-area B2, second sub-area B3, blank area C, third area D, first surface x, first direction y, second direction 11, first signal line 12, second signal line 13, via
[0026] 101, substrate 102, source-drain electrode layer 1021, source electrode 1022, drain electrode 103, gate insulating layer 104, gate layer 1040, gate electrode 105, first insulating layer 106, first wiring layer 107, planarization layer 108, isolation trench 109, second insulating layer
[0027] 200, light-emitting functional layer 20, light-emitting unit
[0028] 21, first electrode 22, light emitting layer 23, second electrode 24, pixel definition layer
[0029] 300, color filter layer 31, color block 32, black matrix
[0030] 400, encapsulation layer 500, protective layer DETAILED DESCRIPTION
[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
[0032] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be the usual meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantitative restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The directional terms mentioned in the present disclosure, such as "top", "bottom", "up", "down", "left" or "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present disclosure, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present disclosure.
[0033] Figure 1 1 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present disclosure. The display panel includes a stacked display backplane 100 and a light-emitting functional layer 200 .
[0034] Figure 2 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure, and Figure 1 yes Figure 2 The cross-sectional structure diagram along the EE section line in FIG. The display backplane 100 has a first region A, a second region B, and a third region C that are sequentially connected in a first direction x. The length of the second region B is greater than half the width of the display panel. The light-emitting functional layer 200 includes a plurality of light-emitting units 20 distributed in an array. The light-emitting unit 20 includes a first electrode 21, a light-emitting layer 22, and a second electrode 23 that are sequentially stacked on the first surface D of the display backplane 100. It should be noted that Figure 2 Only the first electrodes 21 of the plurality of light emitting units are shown.
[0035] Combination Figure 1 and Figure 2The display backplane 100 includes a plurality of first signal lines 11, which extend along the second direction y, the first direction x intersects the second direction y, and each first signal line 11 is used to control the brightness of at least one light-emitting unit 20. The second area B includes a blank area B3, the plurality of first signal lines 11 and the first electrodes 21 of the plurality of light-emitting units 20 are all located outside the blank area B3, the blank area B3 is in a long strip shape, the length direction of the blank area B3 is the second direction y, the width direction of the blank area B3 is the first direction x, and the width e of the blank area B3 is greater than the distance b between two adjacent first signal lines 11 in the first area A and the third area C and greater than the distance d between the first electrodes 21 of two adjacent light-emitting units 20 in the first area A and the third area C. Here, the distance between two adjacent first signal lines 11 refers to the distance between the orthographic projections of the two adjacent first signal lines 11 on the first surface D, and the distance between the first electrodes 21 of two adjacent light-emitting units 20 refers to the distance between the orthographic projections of the first electrodes 21 of two adjacent light-emitting units 20 in the first direction x on the first surface D. It should be noted that Figure 1 It is for illustration only and does not represent the actual proportional relationship between the various structures or areas.
[0036] By setting a blank area B3 in the second area B, and the width direction of the blank area is the first direction x, and the length direction is the second direction y, the width of the blank area B3 is greater than the distance between two adjacent first signal lines 11 in the first area A and the third area C, and greater than the distance between two adjacent first electrodes 21 of the light-emitting units 20 in the first area A and the third area C. Therefore, the blank area divides the second area B into a first sub-area B1 and a second sub-area B2, wherein the first sub-area B1 is connected to the first area A, and the second sub-area B2 is connected to the third area C. In this way, in the process of manufacturing the display panel, one mask plate can be used to manufacture the film layer patterns of the first area A and the first sub-area B1 (for example, the first signal line 11 or the first electrode 21), and another mask plate can be used to manufacture the film layer patterns of the second sub-area B2 and the third area (for example, the first signal line 11 or the first electrode 21). That is, in the process of manufacturing the structure of the display panel, such as the first signal line 11 or the first electrode 21, each area of the display panel is only exposed once, and there is no area that is exposed multiple times.
[0037] If a part of the display panel is exposed multiple times, the area of the photoresist exposed in the part of the display panel after multiple exposures will be larger than the area exposed in the ideal state due to the influence of the alignment accuracy of the repeated exposures, thereby causing the film pattern formed in the part of the display panel after multiple exposures to be different from the film pattern in other areas. Therefore, the embodiment of the present disclosure can improve the problem that the film pattern in the part of the display panel is different from the film pattern in other areas due to the part of the display panel being exposed multiple times, thereby improving the problem of large brightness difference between the part of the display panel and other areas, that is, uneven display.
[0038] In the process of manufacturing the first signal line 11 or the first electrode 21, if the photoresist used is a positive photoresist, the exposed part of the photoresist is dissolved in the subsequent processing, and the unexposed part of the photoresist is not dissolved in the subsequent processing. This part of the photoresist is used to protect the position of the corresponding first signal line 11 or the first electrode 21, so as to facilitate the formation of the first signal line 11 or the first electrode 21 by, for example, etching. If a part of the area is exposed for multiple times, affected by the alignment accuracy of repeated exposure, the size of the first signal line 11 or the first electrode 21 formed in the area is smaller than that of other areas. For example, the first signal line 11 formed in the area is thinner and has a larger resistance than that of other areas, resulting in the brightness of the light-emitting unit 20 controlled by the first signal line 11 being lower than the brightness of the light-emitting unit 20 controlled by the first signal line 11 in other areas, resulting in uneven display.
[0039] In the process of manufacturing the first signal line 11 or the first electrode 21, if the photoresist used is a negative photoresist, the unexposed part of the photoresist is dissolved in the subsequent processing, and the exposed part of the photoresist is not dissolved in the subsequent processing. This part of the photoresist is used to protect the position of the corresponding first signal line 11 or the first electrode 21, so as to facilitate the formation of the first signal line 11 or the first electrode 21 by, for example, etching. If a part of the area is exposed for multiple times, affected by the alignment accuracy of repeated exposure, the size of the first signal line 11 or the first electrode 21 formed in the area is larger than that of other areas. For example, the first signal line 11 formed in the area is thicker and has a smaller resistance than that of other areas, resulting in the brightness of the light-emitting unit 20 controlled by the first signal line 11 being higher than the brightness of the light-emitting unit 20 controlled by the first signal line 11 in other areas, resulting in uneven display.
[0040] In the process of manufacturing the first signal line 11 and the first electrode 21 in the embodiment of the present disclosure, each area of the display panel is exposed only once, thereby avoiding the problem of the width of the first signal line 11 in the repeated exposure area being inconsistent with the width of the first signal line 11 in the single exposure area, thereby improving the problem of uneven display.
[0041] Exemplarily, the distribution density of the light-emitting units 20 in the first region A is greater than the distribution density of the light-emitting units 20 in the second region B, and the distribution density of the light-emitting units 20 in the first region A is equal to the distribution density of the light-emitting units 20 in the third region C. The distance b between two adjacent first signal lines 11 located in the first region B is less than the distance a between two adjacent first signal lines 11 located in the second region B, and the distance b between two adjacent first signal lines 11 located in the first region B is equal to the distance between two adjacent first signal lines 11 located in the third region C. Here, the distribution density refers to the ratio of the number of multiple light-emitting units 20 in a region to the area of the region, or the distribution density refers to the number of light-emitting units 20 per unit area. This design can make the brightness of the first region A and the third region C consistent, and facilitate the setting of a blank area B3 in the second region B.
[0042] In a possible embodiment, Figure 2 As shown, the distribution density of the light emitting units 20 in various locations in the second area B is the same.
[0043] In another possible embodiment, the distribution density of the light emitting units 20 in the second area B gradually increases from the central area to the edge area of the second area B. The distribution density of the light emitting units 20 gradually increases from the central area of the second area B to the edge area, and can be well transitioned to increase to the distribution density of the light emitting units 20 in the first area A and the third area C, so as to improve display uniformity.
[0044] Optionally, the second region B includes a plurality of columns of light-emitting units 20 arranged along the first direction x, the plurality of columns of light-emitting units 20 are divided into a plurality of groups, the plurality of groups of light-emitting units 20 include a first group of light-emitting units 20, a second group of light-emitting units 20 and a third group of light-emitting units 20 that are adjacent in sequence, and the first group of light-emitting units 20 is located in the central region of the second region B, the second group of light-emitting units 20 is located on one side of the first group of light-emitting units 20, and the third group of light-emitting units 20 is located on the side of the second group of light-emitting units 20 away from the first group of light-emitting units 20. Each group of light-emitting units 20 includes two columns of light-emitting units 20; or each group of light-emitting units 20 includes three or more columns of light-emitting units 20, and in the same group of light-emitting units, the distance between each two adjacent columns of light-emitting units 20 is the same. The distance between two adjacent columns of light-emitting units 20 in the first group of light-emitting units 20 is greater than the distance between two adjacent columns of light-emitting units 20 in the second group, and the distance between two adjacent columns of light-emitting units 20 in the second group of light-emitting units 20 is greater than the distance between two adjacent columns of light-emitting units 20 in the third group of light-emitting units 20.
[0045] Optionally, the second region B includes a plurality of columns of light-emitting units 20 arranged along the first direction x, and the distance between two adjacent columns of light-emitting units 20 decreases in sequence from the central region of the second region B toward the edge region. In the direction from the central region of the second region B toward the edge region, the distance between two adjacent columns of light-emitting units 20 decreases evenly, which is beneficial to further improve display uniformity.
[0046] For example, the width of the blank area B3 is in the range of 5 μm to 10 μm. The blank area B3 within this width range will not be too narrow, resulting in repeated exposure areas during the process of manufacturing the display panel; nor will it be too wide, resulting in too low brightness in the second area B, or even dark lines, affecting the display effect.
[0047] For example, Figure 2 As shown, the length of the second region B is equal to the width of the display panel. In other possible embodiments, the length of the second region B is greater than half of the width of the display panel and less than the width of the display panel. For example, the display backplane includes six regions, namely the first region to the sixth region, wherein the first region, the second region and the third region are sequentially connected in the first direction x, the third region, the fourth region and the fifth region are sequentially connected in the first direction x, and the first region and the fourth region are connected in the second direction y, the second region and the fifth region are connected in the second direction y, and the third region and the sixth region are connected in the second direction y. The second region and the fifth region include blank areas. Four mask plates can be used to respectively make the film layer pattern of the first region and a part of the second region, the film layer pattern of another part of the second region and the third region, the film layer pattern of the fourth region and a part of the fifth region, and the film layer pattern of another part of the fifth region and the sixth region on the display backplane. Different numbers of second regions or fifth regions with blank areas can be designed according to display backplanes of different sizes to meet customers' different size requirements for products.
[0048] Exemplarily, the ratio of the distance a between two adjacent first signal lines 11 in the second region B to the distance b between two adjacent first signal lines in the first region A is 5:1 to 20:1. If the ratio of a to b is too large, the distance between two adjacent first signal lines 11 in the second region B will be too large, resulting in the blank space separating the first sub-region B1 and the second sub-region B2 in the second region B being too wide, resulting in the brightness of the second region B being too low, affecting the display effect. If the ratio of a to b is too small, the blank space left in the second region B will be too narrow, which is not enough to use two masks to expose the first region A and the first sub-region B1, the second sub-region B2 and the third region C respectively. Optionally, the ratio of a to b is 8:1 to 12:1. Optionally, the ratio of a to b is 10:1.
[0049] Exemplarily, in the first direction x, the ratio of the distance c between two adjacent first electrodes 21 in the second region B to the distance d between two adjacent first electrodes in the first region A is 5:1 to 20:1. If the ratio of c to d is too large, the distance between two adjacent first electrodes 21 in the second region B will be too large, resulting in a too wide blank space separating the first sub-region B1 and the second sub-region B2 in the second region B, resulting in a low brightness in the second region B, and even dark lines, affecting the display effect. If the ratio of c to d is too small, the blank space left in the second region B will be too narrow, which is not enough to use two masks to expose the first region A and the first sub-region B1, the second sub-region B2 and the third region C respectively. Optionally, the ratio of c to d is 8:1 to 12:1. Optionally, the ratio of c to d is 10:1.
[0050] Optionally, different a values and c values are selected according to different pixel sizes. Figure 2 As shown, the display panel further includes a pixel definition layer 22, and the pixel definition layer 22 is located above the first electrode 21. The pixel definition layer has a plurality of openings, and the openings expose a portion of the first electrode 21. Figure 2 As shown, when the p value is about 10.7μm, a can be about 7.5μm to 7.7μm, and c can be about 3.5μm. The values of a and c are only examples here, and the value of a can also be outside the range of 7.5μm to 7.7μm, and the value of c can also be larger or smaller than 3.5μm. The p value is: for two adjacent rows of first electrodes 21 extending along the first direction x, the distance between the line connecting the top ends of the multiple first electrodes 21 in the upper row and the line connecting the bottom ends of the exposed parts of the multiple first electrodes 21 in the lower row. It should be noted that in Figure 2 In order to clearly show the relationship between the first electrode 21 and the first signal line 11 , the entire pixel definition layer 24 is not shown, but only a portion of the pixel definition layer 24 near one of the first electrodes 21 is shown.
[0051] For example, Figure 1 and Figure 2 As shown, the first signal line 11 is electrically connected to the first electrodes 21 of the plurality of light emitting units 20 arranged along the first direction. A voltage can be applied to the first electrodes 21 in the light emitting units 20 through the first signal line 11 to control the brightness of the plurality of light emitting units 20.
[0052] Optionally, the display panel may be a passive OLED (Organic Light-Emitting Diode) display panel.
[0053] Optionally, the second electrodes 23 of a plurality of light emitting units 20 arranged in the second direction y are connected.
[0054] Optionally, the colors of lights emitted by the plurality of light emitting units 20 corresponding to the plurality of first electrodes 21 electrically connected to one first signal line 11 are the same.
[0055] Optionally, the display panel includes a display area and a non-display area surrounding the display area, and the display panel includes a plurality of pads, the plurality of pads are located in the non-display area, and the plurality of pads are located on at least one side of the display backplane, for example, on one side of the display backplane in the second direction y. A plurality of first signal lines 11 extend to the non-display area and are electrically connected to the plurality of pads respectively. It is convenient for the outside world to input voltage to the plurality of first signal lines 11 through the pads, so as to realize external control of the brightness of the plurality of light-emitting units in the display panel.
[0056] Alternatively, if Figure 1 As shown, the orthographic projection of the first signal line 11 on the first surface D at least partially overlaps with the orthographic projection of the plurality of first electrodes 21 connected to the first signal line 11 on the first surface D.
[0057] Optionally, the shape of the orthographic projection of the first electrode 21 on the first surface D may be as follows: Figure 2 The hexagon shown may also be a square, a triangle, a circle, etc. The orthographic projection shape of the light emitting unit 20 on the first surface D may be the shape of the first electrode or the opening shape of the pixel definition layer where the light emitting unit 20 is located.
[0058] Optionally, the shape of the display panel can be as follows Figure 2 The rectangle shown may also be a circle, etc. Optionally, the blank area B3 in the second area passes through the middle of the rectangular display panel, or passes through the center of the circular display panel.
[0059] Optionally, the color of the light emitted by the light-emitting layers of the plurality of light-emitting units 20 is white. Figure 1 As shown, the display panel also includes a color filter layer 300. The color filter layer includes a plurality of color blocks 31 distributed in an array, and the plurality of color blocks correspond to the plurality of light-emitting units 20 one by one, and the color blocks are located on the side of the corresponding light-emitting unit away from the display backplane. The plurality of color blocks are used to convert the white light emitted by the light-emitting layer 22 into light of different colors, respectively, to achieve a color display function. Exemplarily, the orthographic projections of the plurality of color blocks on the first surface D overlap at least partially with the orthographic projections of the plurality of light-emitting units 20 on the first surface D. The plurality of light-emitting units 20 include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The plurality of color blocks include a first color block, a second color block, and a third color block, and the first color block, the second color block, and the third color block correspond to the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit, respectively. The first color block, the second color block, and the third color block are used to convert the white light emitted by the light-emitting layer 22 into red light, green light, and blue light, respectively.
[0060] Optionally, the display panel may not include a color filter layer, and the color of the light emitted by the light-emitting unit 20 may be red, green or blue, thereby realizing a color display function.
[0061] Optionally, the first electrode 21 is an anode, and the second electrode 23 is a cathode.
[0062] Alternatively, if Figure 1 and Figure 2 As shown, the display panel further includes a planarization layer 109 , and the planarization layer 109 includes a plurality of via holes 13 , and the first signal line 11 is electrically connected to the first electrode 21 through the via holes 13 .
[0063] Alternatively, if Figure 1 As shown, the display panel further includes an encapsulation layer 400. The encapsulation layer 400 is located between the light-emitting functional layer and the color filter layer 300, and is used to protect the light-emitting functional layer 200 and the film layer located under the light-emitting functional layer 200.
[0064] Alternatively, if Figure 1 As shown, the display panel further includes a protective layer 500. The protective layer 500 is located on a side of the color filter layer 300 away from the display backplane 100. The protective layer 500 plays a role in protecting the display panel. Optionally, the protective layer 500 is made of glass.
[0065] Exemplarily, the voltage on the first signal line 11 in the second region B is greater than the voltage on the first signal line 11 in the first region A or the third region C, and the brightness of the light-emitting unit in the unit area of the second region B is greater than the brightness of the light-emitting unit in the unit area of the first region A and the third region C. Since the density of the light-emitting unit 20 in the second region B is lower than the density of the light-emitting unit 20 in the first region A and the third region C, the problem of uneven display can be further improved by increasing the voltage on the first signal line 11 in the second region B.
[0066] Figure 3 It is a schematic diagram of the cross-sectional structure of a display panel provided in an embodiment of the present disclosure. Figure 4 Schematic diagram of a planar structure of a display panel provided by an embodiment of the present disclosure. Figure 3 and Figure 4 As shown, the display backplane 100 includes a plurality of pixel driving circuits (not shown), the plurality of pixel driving circuits are connected one-to-one with the plurality of light-emitting units 20, and each first signal line 11 is electrically connected with at least one pixel driving circuit. The first signal line 11 controls the brightness of the light-emitting unit 20 through the pixel driving circuit.
[0067] For example, Figure 3 and Figure 4As shown, the display backplane further includes a plurality of second signal lines 12, the plurality of second signal lines 12 extend along the first direction x, and each second signal line 12 is electrically connected to at least one pixel driving circuit. The first signal line 11 and the second signal line 12 control the pixel driving circuit electrically connected to the first signal line 11 and the second signal line 12, thereby controlling the light-emitting unit 20 electrically connected to the pixel driving circuit to achieve a display function.
[0068] Optionally, the pixel driving circuit comprises a plurality of transistors.
[0069] Optionally, the first signal line 11 is a data line, and the second signal line 12 is a gate line. The first signal line 11 is electrically connected to the source-drain electrode layer 102 , and the second signal line 12 is electrically connected to the gate electrode layer 104 .
[0070] Exemplarily, the display backplane 100 is a silicon-based driving backplane. In the process of manufacturing the silicon-based driving backplane, a silicon mask is used to manufacture the signal line, and a silicon mask is also used to manufacture the first electrode on the display backplane. However, the existing silicon mask is relatively small, and the size of the display panel required by the customer is relatively large. In the related technology, a partial area needs to be exposed twice to manufacture the display panel. Therefore, the embodiment of the present disclosure is particularly suitable for display panels including silicon-based display backplanes.
[0071] Alternatively, if Figure 3 As shown, the silicon-based driving backplane includes a first wiring layer 106 and a second wiring layer (not shown). The first signal line 11 is located in the first wiring layer 106, and the second signal line 12 is located in the second wiring layer. Since the resistance of the source-drain layer 102 and the gate layer 104 is relatively large, the first wiring layer 106 is provided as a separate layer, for example, above the source-drain layer 102; and the second wiring layer is provided as a separate layer, for example, above the gate layer 104. It is convenient to use materials with relatively low resistance, such as metal materials, to make the first signal line 11 and the second signal line 12.
[0072] Optionally, the first signal line 11 and the second signal line 12 are made of metal materials, such as copper, aluminum, and tungsten. The first signal line 11 and the second signal line 12 can be made of one metal material, or can include a plurality of stacked metal films made of different materials.
[0073] Optionally, the first wiring layer 110 is located on a side of the second wiring layer close to the light-emitting functional layer 200. This can reduce interference of the electrical signal in the first signal line 11 on the transistor.
[0074] The structure of the silicon-based driving backplane is exemplarily described below. Figure 3 As shown, the silicon-based driving backplane includes a plurality of transistors, and the transistors may be metal oxide semiconductor field effect transistors (metal oxide semiconductor, MOS).
[0075] For example, Figure 3 As shown, the silicon-based driving backplane includes a substrate 101, a source and drain layer 102, a gate insulating layer 103, a gate layer 104, a first insulating layer 105, a second wiring layer, a second insulating layer 109, a first wiring layer 106 and a planarization layer 107 stacked in sequence.
[0076] Exemplarily, the gate layer 104 includes a gate 1040 , the source-drain layer 102 includes a source 1021 and a drain 1022 , and the gate 1040 , the source 1021 , and the drain 1022 form a MOS transistor.
[0077] Optionally, the transistor may be an N-type MOS transistor or a P-type MOS transistor. For an N-type MOS transistor, the substrate 101 located below the N-type MOS transistor may be a P-type semiconductor, and the source 1021 and the drain 1022 may be N-type semiconductors; for a P-type MOS transistor, the substrate 101 located below the P-type MOS transistor may be an N-type semiconductor, and the source 1021 and the drain 1022 may be P-type semiconductors.
[0078] Optionally, the silicon-based display backplane 10 further includes a plurality of isolation trenches 108, and the isolation trenches 108 are located between two adjacent transistors. Optionally, the isolation trenches 108 are made using a shallow trench isolation (STI) process. Optionally, the isolation trenches 108 are filled with deposited oxide.
[0079] Optionally, there are a plurality of first via holes in the gate insulating layer 103 , the insulating layer 105 and the second insulating layer 109 , so as to facilitate the electrical connection of the first signal line 11 in the first wiring layer 106 with the source and drain electrode layer 102 through the first via holes.
[0080] Optionally, there are a plurality of second via holes in the gate insulating layer 103 and the insulating layer 105 , so as to facilitate the electrical connection of the second signal line 12 in the second wiring layer with the gate layer 106 through the second via holes.
[0081] Exemplarily, the gate insulating layer 103 may be made of silicon oxide, silicon nitride, silicon oxynitride, or the like.
[0082] Exemplarily, the insulating layer 105 may be made of silicon oxide, silicon nitride, silicon oxynitride, or the like.
[0083] Exemplarily, the planarization layer 109 is made of an organic insulating material, such as resin.
[0084] Exemplarily, the display backplane may also be a driving backplane including a plurality of TFTs (Thin Film Transistors), such as an LTPO (Low-temperature Polycrystalline oxide) backplane, or an LTPS (Low-Temperature Poly-Silicon) backplane. Optionally, the display backplane includes a gate layer, an active layer, and a source and drain layer. The active layer is made of a metal oxide semiconductor material such as a low-temperature polycrystalline silicon material and IGZO (Indium GalliumZinc Oxide), or the active layer is made of a low-temperature polycrystalline silicon material.
[0085] Figure 5 FIG. 1 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present disclosure. Figure 5 As shown, the method includes:
[0086] In step S1, a display backplane is manufactured, wherein the display backplane comprises a first region, a second region and a third region which are sequentially connected in a first direction, and the length of the second region is greater than half of the width of the display panel.
[0087] In step S2, a light-emitting functional layer is manufactured on the display backplane. The light-emitting functional layer includes a plurality of light-emitting units distributed in an array, and the light-emitting units include a first electrode, a light-emitting layer, and a second electrode sequentially stacked on the surface of the display backplane.
[0088] The display backplane includes a plurality of first signal lines extending along a second direction, the second direction intersecting the first direction, and each first signal line is used to control the brightness of at least one light-emitting unit. The second area includes a blank area, the plurality of first signal lines and the first electrodes of the plurality of light-emitting units are all located outside the blank area, the blank area is in a long strip shape, the length direction of the blank area is the second direction, the width direction of the blank area is the first direction, and the width of the blank area is greater than the distance between two adjacent first signal lines in the first area and the third area and greater than the distance between two adjacent first electrodes of the light-emitting units in the first area and the third area.
[0089] Exemplarily, the second region includes a first sub-region and a second sub-region, and the first sub-region, the blank region and the second sub-region are sequentially connected in a first direction, and the first sub-region is connected to the first region, and the second sub-region is connected to the third region. The production of the display backplane includes: using a first mask to form a plurality of first signal lines located in the first region and the first sub-region, and using a second mask to form a plurality of signal lines located in the second sub-region and the third region. The production of the light-emitting functional layer includes: using a third mask to form a plurality of first electrodes located in the first region and the first sub-region, and using a fourth mask to form a plurality of first electrodes located in the second sub-region and the third region. By setting a blank region, the problem that the film pattern of a part of the display panel is different from the film pattern of other regions due to multiple exposures of the part of the display panel can be improved, thereby improving the problem of large brightness difference between the part of the display panel and other regions, that is, uneven display.
[0090] An embodiment of the present disclosure further provides a display device, which includes any one of the aforementioned display panels and a power supply circuit, wherein the power supply circuit is used to supply power to the display panel.
[0091] Illustratively, the display device provided in the embodiments of the present disclosure may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or the like.
[0092] The display device has the same effect as the above-mentioned display panel, which will not be described in detail here.
[0093] Exemplarily, the display device further includes a control circuit, which is electrically connected to the display panel and configured to provide a first voltage to a first signal line corresponding to a plurality of first light-emitting units, and to provide a second voltage to a second signal line corresponding to a plurality of second light-emitting units, wherein the first light-emitting unit and the first signal line corresponding to the first light-emitting unit are located in the second region, and the second light-emitting unit and the first signal line corresponding to the second light-emitting unit are located in the first region or the third region, and the first voltage is greater than the second voltage, so that the brightness of the light-emitting unit within a unit area of the second region is the same as the brightness of the light-emitting unit within a unit area of the first region, and the brightness of the light-emitting unit within a unit area of the second region is the same as the brightness of the light-emitting unit within a unit area of the third region. Since the density of the light-emitting unit located in the second region is lower than the density of the light-emitting unit located in the first region and the third region, the problem of uneven display can be further improved by making the first voltage greater than the second voltage.
[0094] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.
Claims
1. A display panel, characterized in that: The display panel includes a stacked display backplane and a light-emitting functional layer, wherein the display backplane has a first region, a second region, and a third region sequentially connected in a first direction, wherein the length of the second region is greater than half of the width of the display panel, and the light-emitting functional layer includes a plurality of light-emitting units distributed in an array, wherein the light-emitting units include a first electrode, a light-emitting layer, and a second electrode sequentially stacked on a first surface of the display backplane; The display backplane comprises a plurality of first signal lines, the plurality of first signal lines extend along a second direction, the second direction intersects the first direction, and each of the first signal lines is used to control the brightness of at least one of the light-emitting units; The second area includes a blank area, the multiple first signal lines and the first electrodes of the multiple light-emitting units are all located outside the blank area, the blank area is in a long strip shape, the length direction of the blank area is the second direction, the width direction of the blank area is the first direction, and the width of the blank area is greater than the distance between two adjacent first signal lines in the first area and the third area and greater than the distance between two adjacent first electrodes of the light-emitting units in the first area and the third area.
2. The display panel according to claim 1, characterized in that: The distribution density of the light-emitting units in the first region is greater than the distribution density of the light-emitting units in the second region, and the distribution density of the light-emitting units in the first region is equal to the distribution density of the light-emitting units in the third region; The distance between two adjacent first signal lines in the first area is smaller than the distance between two adjacent first signal lines in the second area, and the distance between two adjacent first signal lines in the first area is equal to the distance between two adjacent first signal lines in the third area.
3. The display panel according to claim 2, characterized in that: The distribution density of the light emitting units in the second area gradually increases from the central area to the edge area of the second area.
4. The display panel according to claim 2 or 3, characterized in that: The width of the blank area ranges from 5 μm to 10 μm.
5. The display panel according to claim 4, characterized in that: In the first direction, a ratio of a distance between two adjacent first electrodes located in the second region to a distance between two adjacent first electrodes located in the first region is 5:1 to 20:
1.
6. The display panel according to claim 4, characterized in that: The ratio of the distance between two adjacent first signal lines located in the second region to the distance between two adjacent first signal lines located in the first region is 5:1 to 20:
1.
7. The display panel according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: The first signal line is electrically connected to first electrodes of a plurality of the light emitting units arranged along the second direction.
8. The display panel according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: The display backplane further includes a plurality of pixel driving circuits, which are connected to the plurality of light-emitting units in a one-to-one correspondence, and each of the first signal lines is electrically connected to at least one of the pixel driving circuits.
9. The display panel according to any one of claims 1 to 3 and claims 5 to 6, characterized in that: The display backplane is a silicon-based driving backplane.
10. A display device, characterized in that: The display device comprises a power supply circuit and a display panel according to any one of claims 1 to 9, wherein the power supply circuit supplies power to the display panel.
11. The display device according to claim 10, characterized in that: The display device also includes a control circuit, which is electrically connected to the display panel and configured to provide a first voltage to first signal lines corresponding to multiple first light-emitting units, and provide a second voltage to second signal lines corresponding to multiple second light-emitting units, the first light-emitting units and the first signal lines corresponding to the first light-emitting units are located in the second area, the second light-emitting units and the first signal lines corresponding to the second light-emitting units are located in the first area or the third area, and the first voltage is greater than the second voltage, so that the brightness of the light-emitting units within a unit area of the second area is the same as the brightness of the light-emitting units within a unit area of the first area, and the brightness of the light-emitting units within a unit area of the second area is the same as the brightness of the light-emitting units within a unit area of the third area.