Display screen and display screen printing method

Abstract

The invention relates to the technical field of display screen manufacturing, in particular to a display screen and a display screen printing method.The display screen comprises a circuit mainboard, at least two rows of light-emitting sets and at least one row of ink layer, the circuit mainboard is formed by splicing a plurality of circuit daughter boards, and the light-emitting sets are arranged at intervals in the first direction; each row of light-emitting group comprises a plurality of light-emitting components which are arranged at intervals in the second direction, the light-emitting components are electrically connected to the circuit daughter board, and the ink layer is coated at the interval between every two rows of light-emitting groups, so that the problem of inconsistent ink color of an original display screen is solved; according to the technical scheme, the precision requirement for ink color consistency of the circuit daughter boards can be lowered, compared with the mode that the circuit daughter boards are stored additionally, and the circuit daughter boards with the similar colors are selected from the circuit daughter boards to form the circuit mainboard, the situation that the production number of the circuit daughter boards is far larger than the actual needed number can be relieved, and therefore the production cost is lowered.

Description

Technical Field

[0001] The present application relates to the technical field of display screen manufacturing, and in particular to a display screen and a display screen printing method. Background Art

[0002] As people's requirements for display screens become higher and higher, in addition to light display, color consistency under black screen has also attracted much attention, and it is also a pain point that the industry has been unable to solve. The consistency of black screen is mainly achieved by the color consistency of PCB ink, so the consistency requirements of PCB ink color are very high. The general ink color choice is black, but due to process problems, it cannot be guaranteed that the color consistency between the finished products produced each time will meet expectations.

[0003] In order to meet the ink color consistency requirements of the display screen, PCB boards are usually kept in stock. Circuit boards with similar colors are selected from more PCB boards to form the circuit boards of the display screen. However, manual selection standards are different and the errors are large, or inkjet or coating processes are added to the finished product to compensate. Summary of the invention

[0004] The main technical problem solved by the present application is to improve the color consistency of the display screen in a black screen state, and to provide a display screen and a display screen printing method.

[0005] In order to solve the above technical problems, a technical solution adopted in this application is:

[0006] A display screen, comprising: a circuit main board, which is formed by splicing a plurality of circuit sub-boards;

[0007] At least two rows of light-emitting groups are arranged on the circuit main board, the at least two rows of light-emitting groups are arranged at intervals in a first direction, each row of light-emitting groups includes a plurality of light-emitting components arranged at intervals in a second direction perpendicular to the first direction, the light-emitting components are electrically connected to the circuit sub-board, and a first preset spacing of the at least two rows of light-emitting groups in the first direction is greater than a second preset spacing of the plurality of light-emitting components in the second direction;

[0008] At least one row of ink layer is provided, and one row of ink layer is provided at the interval between every two rows of light-emitting groups.

[0009] Optionally, in the first direction, a distance between the ink layer and at least one of the two rows of light-emitting groups on both sides thereof is between 0.1 mm and 0.3 mm.

[0010] Optionally, a third preset distance between the ink layer and two rows of light-emitting groups on both sides thereof is 0.2 mm.

[0011] Optionally, a row of the ink layer includes a plurality of ink segments arranged at intervals of a fourth preset spacing along the second direction, and the fourth preset spacing is between 0.4 mm and 0.6 mm.

[0012] Optionally, the fourth preset spacing is 0.5 mm.

[0013] Optionally, the light emitting assembly includes a light emitting element and a plurality of solder pads connected to the light emitting element, and the light emitting element is electrically connected to the circuit sub-board through the solder pads.

[0014] Optionally, a plurality of the pads are arranged at intervals along the circumference of the light emitting element.

[0015] Optionally, the light emitting element comprises a light emitting diode.

[0016] Optionally, the ink layer includes a green solder resist ink layer.

[0017] In order to solve the above technical problems, the present application also provides a display screen printing method, which comprises:

[0018] Providing a circuit main board, wherein the circuit main board is formed by splicing a plurality of circuit sub-boards;

[0019] At least two rows of light-emitting groups are arranged on the circuit main board, the at least two rows of light-emitting groups are arranged at intervals in a first direction, each row of light-emitting groups includes a plurality of light-emitting components arranged at intervals in a second direction perpendicular to the first direction, the light-emitting components are electrically connected to the circuit sub-board, and a first preset spacing of the at least two rows of light-emitting groups in the first direction is greater than a second preset spacing of the plurality of light-emitting components in the second direction;

[0020] A line of ink layer is applied at the interval between every two lines of light-emitting groups.

[0021] The beneficial effects of the present application are as follows: the display screen includes a circuit main board, at least two rows of light-emitting groups, and at least one row of ink layer; the circuit main board is formed by splicing a plurality of circuit sub-boards; the light-emitting groups are arranged at intervals in a first direction; each row of light-emitting groups includes a plurality of light-emitting components arranged at intervals along a second direction; the light-emitting components are electrically connected to the circuit sub-boards; and the ink layer is applied at the intervals between every two rows of light-emitting groups. This can alleviate the problem of inconsistent colors at different positions of the display screen due to inconsistent ink colors among the plurality of circuit sub-boards when the display screen is in a black screen state; and at the same time, in the manufacturing process of the display screen, the precision requirements for the consistency of ink colors of the plurality of circuit sub-boards can be reduced. Compared with keeping more circuit sub-boards in stock and selecting circuit sub-boards with similar colors from them to form a circuit main board, this can alleviate the situation where the production quantity of circuit sub-boards is far greater than the actually required quantity, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a display screen provided by the present application;

[0024] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of part A;

[0025] Figure 3 It is a comparative schematic diagram of two display screens provided in this application;

[0026] Figure 4 It is a flowchart of the display screen printing method provided in this application. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In addition, the terms "including", "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] As people pursue high-definition and high-precision display quality, and the industry's technology and equipment for manufacturing small-pitch display modules become increasingly mature, the dot pitch of display screens has become smaller and smaller, and the pixel size has gradually shrunk. Small-pitch display screen products are not only used in outdoor displays, but are also beginning to enter the terminal consumer market.

[0031] After the display pixel size is reduced, multiple display unit modules need to be spliced ​​together to construct a large-sized display screen. After the pixel pitch is miniaturized, the display screen may have abandoned the black grid. At this time, the black ink will have a certain impact on the uniformity of the LED module. As the observer's viewing distance becomes shorter and the observation angle is different, it is easier to identify the problem of uneven uniformity when looking at the display screen from different viewing angles. The ink color consistency of the display screen is one of the issues that manufacturers focus on. At present, many manufacturers replace display modules with ink color differences based on visual judgment results before product shipment verification. However, as the display pixel pitch becomes finer and finer, from P3.0mm to P1.4mm or even smaller display technology development, it is no longer easy for people to judge the uniformity problem with the naked eye, and it is also difficult to find the differences between modules. Therefore, the problem of inconsistent ink color of the display screen needs to be solved urgently.

[0032] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an embodiment of a display screen provided in this application. Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A.

[0033] The present application provides a display screen, which includes a circuit main board 10, multiple rows of light-emitting groups 20 and multiple rows of ink layers 30. The circuit main board 10 is spliced ​​by multiple circuit sub-boards 12. The light-emitting groups 20 have at least two rows. The specific number of the light-emitting groups 20 is determined according to the actual size of the display screen. The multiple rows of light-emitting groups 20 are evenly spaced along a first direction S1, and each row of the light-emitting groups 20 includes multiple light-emitting components 22 evenly spaced along a second direction S2. The light-emitting components 22 are electrically connected to the circuit sub-board 12, wherein the first direction S1 and the second direction S2 are perpendicular to each other, and a first preset spacing L1 between the light-emitting groups 20 in the first direction S1 is greater than a second preset spacing L2 between the light-emitting components 22 in the second direction S2. The first preset spacing L1 is larger, which reserves space for the application of the ink layer 30, so that the light-emitting After all components 22 are installed on the circuit main board 10, the circuit main board 10 will be subjected to solder mask treatment, and a uniform layer of solder mask ink will be printed on the surface of the circuit main board 10. In the manufacturing process of the printed circuit main board 10 (PCB board), the coating of solder mask ink is a very critical process, which is mainly through screen printing or coating of solder mask ink, a layer of solder mask is coated on the board surface, and through exposure and development, the pads and holes to be soldered are exposed, and the other places are covered with a solder mask layer to prevent short circuits during welding. The main function of the solder mask on the PCB board is to protect the circuit, prevent the conductors from being stained with tin, prevent electrical short circuits between conductors caused by moisture or chemicals, and prevent the surrounding environment from invading the PCB board. PCB boards without solder mask are easily oxidized when exposed to the air, and become defective products, which also affects the electrical performance of the PCB board and ultimately affects the quality of the display screen.

[0034] After the solder mask treatment is completed, all PCB boards need to be surface treated to ensure good solderability and electrical performance. Common surface treatments include: tin spraying, immersion gold, OSP, immersion tin, etc., and then molding is performed. The PCB board is cut into the required size, and then according to the size requirements of the display screen, multiple circuit sub-boards 12 are spliced ​​into a circuit main board 10 of the required size, and the finished circuit main board 10 is coated with an ink layer 30. The ink layer 30 is coated at the interval between every two rows of light-emitting groups 20. The additional ink layer 30 is used to reduce the color difference of the ink color of the display screen, and the inconsistency of the original ink color of the display screen is weakened. There is no need to color sort the circuit main board 10, saving the processing cost of inkjet.

[0035] See also Figure 3 , Figure 3 3 is a schematic diagram for comparing two display screens provided in the present application, wherein the left side is a display screen before the ink layer 30 is applied, and the right side is a display screen after the ink layer 30 is applied. Figure 3It can be seen that the left display screen has an obvious ink color difference, while the ink color of the right display screen is basically the same. After the ink layer 30 is applied, the color difference of the ink color of the display screen is effectively reduced.

[0036] Specifically, in the first direction S1, the spacing between the ink layer 30 and at least one of the two rows of light-emitting groups 20 on both sides thereof is between 0.2 mm and 0.3 mm, that is, the spacing between the ink layer 30 and the light-emitting groups 20 on one side may be between 0.2 mm and 0.3 mm, and the spacing between the ink layer 30 and the light-emitting groups 20 on both sides may also be between 0.2 mm and 0.3 mm. A spacing needs to be left between the ink layer 30 and the light-emitting groups 20 to prevent the ink layer 30 from covering the light-emitting groups 20 and affecting the light-emitting groups 20 from performing their functions.

[0037] In this embodiment, the spacing between the ink layer 30 and the two rows of light-emitting groups 20 on both sides thereof is the same, which is the third preset spacing L3, and the third preset spacing L3 is 0.2 mm. In other alternative embodiments, the spacing between the ink layer 30 and the light-emitting groups 20 on both sides thereof may be different, or the third preset spacing L3 may be other suitable values, such as 0.3 mm.

[0038] In the present application, the ink layer 30 can be coated by overprinting solder mask. A corresponding silk screen is designed for the model of the circuit main board 10. Green solder mask ink is selected for the ink layer 30. Overprinting solder mask is performed at the interval between every two rows of light-emitting groups 20. The ink layer 30 is segmented in the second direction S2. Each row of the ink layer 30 includes a plurality of ink segments 32 spaced at a fourth preset spacing L4 along the second direction S2. The fourth preset spacing L4 can be between 0.4 mm and 0.6 mm. In the present embodiment, the fourth preset spacing L4 is 0.5 mm. In other alternative embodiments, the fourth preset spacing L4 can also select other suitable values, such as 0.6 mm.

[0039] All ink segments 32 of solder resist are overprinted between the light-emitting groups 20, so that the areas of the display screen not covered by the light-emitting components 22 are overprinted with green ink segments 32, which effectively reduces the color difference of the ink color of the display screen. Green solder resist ink is selected for overprinting because it has the best effect of reducing the color difference of the ink color of the display screen. From a functional point of view, the components added to the green ink have long been fixed, and the green color is easy to develop and not easy to fall off, and will not affect the function of the display screen. For appearance inspection, green can more easily detect defects such as scratches and offsets, while other colors of ink are added with some powder substances that change the color, which is relatively costly.

[0040] In the present application, the light-emitting component 22 may also include a light-emitting element 24 and a plurality of solder pads 26 connected to the light-emitting element 24. The solder pads 26 are pins in the component package. The light-emitting element 24 is electrically connected to the circuit board 12 through the solder pads 26. In the present embodiment, the light-emitting element 24 may be a light-emitting diode (LED). In other alternative embodiments, the light-emitting element 24 may also be a cold cathode fluorescent lamp (CCFL).

[0041] A plurality of solder pads 26 are arranged at intervals along the circumference of the light emitting element 24 to ensure a stable connection between the light emitting element 24 and the circuit board 12. Different soldering methods are used according to the structure of the light emitting element 24 and the circuit board used to solder the solder pads 26 along the circumference of the light emitting element 24. In the present embodiment, four solder pads 26 are installed on the light emitting element 24. In other alternative embodiments, other suitable numbers of solder pads 26 may also be installed, such as three, six, etc.

[0042] like Figure 4 As shown, in order to solve the problem of inconsistent ink color on the display screen, the present application also provides a display screen printing method, which includes:

[0043] Step S301 : providing a circuit main board 10 , wherein the circuit main board 10 is formed by splicing a plurality of circuit sub-boards 12 .

[0044] Step S302: at least two rows of light-emitting groups 20 are arranged on the circuit main board 10, and the at least two rows of light-emitting groups 20 are arranged at intervals in the first direction S1. Each row of light-emitting groups 20 includes a plurality of light-emitting components 22 arranged at intervals in a second direction S2 perpendicular to the first direction S1. The light-emitting components 22 are connected to the circuit sub-board 12. The first preset spacing L1 of the at least two rows of light-emitting groups 20 in the first direction S1 is greater than the second preset spacing L2 of the plurality of light-emitting components 22 in the second direction S2.

[0045] Step S303 : applying a row of ink layer 30 at the interval between every two rows of light-emitting groups 20 .

[0046] The present application provides a display screen printing method, which uses green solder resist ink to overprint a row of ink segments 32 at the interval between every two rows of light-emitting groups 20, leaving a fourth preset spacing L4 between the ink segments 32, and also leaving spacing between the ink segments 32 and the light-emitting groups 20 on both sides. In this way, after all the ink segments 32 are overprinted, all the ink segments 32 are evenly distributed on the display screen, thereby alleviating the problem of inconsistent ink color of the original display screen and improving the quality of the display screen.

[0047] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display screen, characterized in that: The display screen comprises: The circuit main board is composed of multiple circuit sub-boards; At least two rows of light-emitting groups are arranged on the circuit main board, the at least two rows of light-emitting groups are arranged at intervals in a first direction, each row of light-emitting groups includes a plurality of light-emitting components arranged at intervals in a second direction perpendicular to the first direction, the light-emitting components are electrically connected to the circuit sub-board, and a first preset spacing of the at least two rows of light-emitting groups in the first direction is greater than a second preset spacing of the plurality of light-emitting components in the second direction; At least one row of ink layer is provided, and one row of ink layer is provided at the interval between every two rows of light-emitting groups.

2. The display screen according to claim 1, characterized in that: In the first direction, the distance between the ink layer and at least one of the two rows of light-emitting groups on both sides thereof is between 0.1 mm and 0.3 mm.

3. The display screen according to claim 2, characterized in that: The third preset distance between the ink layer and the two rows of light-emitting groups on both sides thereof is 0.2 mm.

4. The display screen according to claim 1, characterized in that: A row of the ink layer includes a plurality of ink segments arranged at intervals of a fourth preset pitch along the second direction, and the fourth preset pitch is between 0.4 mm and 0.6 mm.

5. The display screen according to claim 4, characterized in that: The fourth preset distance is 0.5 mm.

6. The display screen according to any one of claims 1 to 5, characterized in that: The light emitting assembly includes a light emitting element and a plurality of solder pads connected to the light emitting element, and the light emitting element is electrically connected to the circuit sub-board through the solder pads.

7. The display screen according to claim 6, characterized in that: The plurality of pads are arranged at intervals along the circumferential direction of the light emitting element.

8. The display screen according to claim 6, characterized in that: The light emitting element includes a light emitting diode.

9. The display screen according to claim 1, characterized in that: The ink layer includes a green solder resist ink layer.

10. A display screen printing method, characterized in that: The display screen printing method comprises: Providing a circuit main board, wherein the circuit main board is formed by splicing a plurality of circuit sub-boards; At least two rows of light-emitting groups are arranged on the circuit main board, the at least two rows of light-emitting groups are arranged at intervals in a first direction, each row of light-emitting groups includes a plurality of light-emitting components arranged at intervals in a second direction perpendicular to the first direction, the light-emitting components are electrically connected to the circuit sub-board, and a first preset spacing of the at least two rows of light-emitting groups in the first direction is greater than a second preset spacing of the plurality of light-emitting components in the second direction; A line of ink layer is applied at the interval between every two lines of light-emitting groups.

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