LED display screen

Abstract

The utility model relates to an LED (light-emitting diode) display screen, which comprises a substrate provided with a control circuit; the array substrate comprises a substrate body and m * n pixel units, the pixel units are evenly arranged on the substrate body at intervals in rows and columns, each pixel unit comprises four LED light sources arranged in a 2 * 2 matrix, each LED light source is provided with a positive electrode and a negative electrode, and the four LED light sources of each pixel unit comprise a red LED light source, a blue LED light source and two green LED light sources. According to the LED display screen, more pixels are generated in the mode that the LED light sources arranged in the 2 * 2 matrix form the pixel units; and the number of circuits is reduced, so that the preparation process is simplified, and heat dissipation is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of LED technology, and in particular to an LED display screen. Background Technology

[0002] With the continuous advancement of LED technology, the requirements for the brightness and image quality of LED displays are becoming increasingly stringent. The image quality of an LED display largely depends on the number of pixels displayed. To improve the image quality and make it more detailed, it is necessary to increase the pixel density of the display.

[0003] Existing LED displays typically consist of three LED light sources arranged linearly to form a pixel unit, with multiple pixel units arranged in rows and columns. This arrangement results in low pixel density on the same area of ​​the LED display. If the pixel density is increased by arranging them too tightly, it can affect the wiring. Densely arranged pixel units also increase the cost of the LED light sources used, and dense wiring also leads to heat dissipation problems.

[0004] Therefore, existing LED displays suffer from low pixel density and difficulty in solving heat dissipation issues related to wiring. Utility Model Content

[0005] To address the aforementioned problems, the present invention aims to provide an LED display screen that can solve the issues of low pixel density and difficulty in heat dissipation due to wiring in existing LED display screens.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] An LED display screen includes:

[0008] A substrate, wherein control circuitry is provided on the substrate; and

[0009] The substrate contains m×n pixel units, which are evenly spaced in rows and columns. Each pixel unit comprises four LED light sources arranged in a 2×2 matrix. Each LED light source has a positive electrode and a negative electrode. The four LED light sources in each pixel unit include one red LED light source, one blue LED light source, and two green LED light sources. The two green LED light sources in each pixel unit are located on one diagonal of the 2×2 matrix, and the one red LED light source and one blue LED light source are located on the other diagonal.

[0010] The control circuit includes m row control lines and 4n column control lines, wherein:

[0011] All negative terminals of the pixel units in each row are connected to the same row control line, and the positive terminals of LEDs of the same color in each column are connected to the same column control line; or

[0012] All positive terminals of the pixel units in each row are connected to the same row control line, and the negative terminals of LEDs of the same color in each column are connected to the same column control line.

[0013] In one feasible embodiment, the LED light source is a flip-chip LED.

[0014] In one feasible embodiment, the row control line is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row, with the negative terminals of the upper and lower LED light sources interconnected and connected to the row control line.

[0015] In one feasible embodiment, the row control line is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row, with the positive electrodes of the upper and lower LED light sources interconnected and connected to the row control line.

[0016] In one feasible embodiment, each column of LED light sources has column control lines on both sides.

[0017] In one feasible embodiment, two green LED light sources in each pixel unit are positioned on the diagonal of the 2×2 matrix, at the bottom left and top right.

[0018] In one feasible embodiment, two green LED light sources in each pixel unit are positioned on the diagonal of the 2×2 matrix, at the top left and bottom right.

[0019] In one feasible embodiment, the distance between any two adjacent LED light sources in the row and column directions is P, where 0.1mm ≤ P ≤ 20mm.

[0020] In one feasible embodiment, an intermediate pixel unit is formed between two adjacent pixel units located in the same row or column, and each intermediate pixel unit consists of four LED light sources arranged in a 2×2 matrix.

[0021] In one feasible embodiment, the row control line and the column control line are located on different sides of the substrate, the substrate is provided with conductive holes, and the pixel unit is electrically connected to the row control line or the column control line through the conductive holes.

[0022] By adopting the above technical solution, this utility model has at least the following beneficial effects:

[0023] The LED display screen provided by this utility model has two green LED light sources in each pixel unit. Green contains more brightness information, and the visual system has a higher ability to distinguish details of brightness than details of color. Therefore, this layout is beneficial to improving brightness resolution. At the same time, the method of using 2×2 matrix arrangement of LED light sources to form pixel units in this utility model can produce more pixels with the same area and arrangement density compared with the existing technology that uses three LED light sources in a linear arrangement. In addition, the positive and negative electrodes of the LED light sources are connected together through control lines set on the substrate, which reduces the number of lines, thereby simplifying the manufacturing process and also helping heat dissipation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an existing LED display screen structure.

[0025] Figure 2 This is a schematic diagram of the LED display screen structure provided in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the first type of substrate front partial pad arrangement structure provided in this utility model embodiment;

[0027] Figure 4 This is a schematic diagram of the second type of substrate front partial pad arrangement structure provided in this embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the third type of substrate front partial pad arrangement structure provided in this embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the fourth type of substrate front partial pad arrangement structure provided in this embodiment of the utility model;

[0030] Figure 7 This is a partial structural diagram of the back side of the substrate provided in an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the fifth type of substrate front partial pad arrangement structure provided in this utility model embodiment;

[0032] Figure 9 This is a schematic diagram of the sixth type of substrate front partial pad arrangement structure provided in this utility model embodiment;

[0033] Figure 10 This is a schematic diagram of the seventh type of substrate front partial pad arrangement structure provided in this utility model embodiment;

[0034] Figure 11 This is a schematic diagram of the eighth type of substrate front partial pad arrangement structure provided in this utility model embodiment.

[0035] In the attached diagram, 1 is the substrate; 11 is the conductive hole; 2 is the pixel unit; 21 is the red LED light source; 22 is the blue LED light source; 23 is the green LED light source; 3 is the control circuit; 31 is the row control line; 32 is the column control line; 321 is the first column control line; 322 is the second column control line; 323 is the third column control line; 324 is the fourth column control line; 4 is the pad; 5 is the middle pixel unit; and 100 is the LED pixel unit. Detailed Implementation

[0036] The technical solution of this utility model patent will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. "Row" and "column" are only used as relative descriptions, and those skilled in the art can change "column" to "row" by reversing the direction; no strict limitation is imposed here.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] like Figure 1 The above, Figure 1This is a schematic diagram of a conventional LED display screen structure. In this conventional LED display screen, each LED pixel unit 100 mainly consists of a red light source (R), a green light source (G), and a blue light source (B) arranged in a linear fashion, thus forming a regular arrangement of several LED pixel units 100 in rows and columns. However, it is obvious that the LED pixel units 100 are independent of each other and there is no correlation or combination relationship between them. The pixel density can only be achieved by simply reducing the spacing, which makes it difficult to achieve better picture quality requirements.

[0040] See Figures 2-3 , Figure 2 This is a schematic diagram of the LED display screen structure provided in this embodiment. Figure 3 This is a schematic diagram of the first type of substrate front partial pad arrangement structure provided in this embodiment. This embodiment also provides an LED display screen, including:

[0041] Substrate 1, wherein control circuitry 3 is provided on substrate 1; and

[0042] m×n pixel units 2 are evenly spaced in rows and columns on the substrate 1. Each pixel unit 2 consists of four LED light sources arranged in a 2×2 matrix. Each LED light source has a positive electrode and a negative electrode. The four LED light sources of each pixel unit include one red LED light source 21, one blue LED light source 22, and two green LED light sources 23. The two green LED light sources 23 of each pixel unit 2 are arranged on one diagonal of the 2×2 matrix, and the one red LED light source 21 and the one blue LED light source 22 are arranged on the other diagonal.

[0043] The control line 3 includes m row control lines 31 and 4n column control lines 32, wherein:

[0044] All negative terminals of the pixel units 2 in each row are connected to the same row control line 31, and the positive terminals of LEDs of the same color in each column are connected to the same column control line 32; or

[0045] All positive terminals of the pixel units 2 in each row are connected to the same row control line 31, and the negative terminals of LEDs of the same color in each column of LED light sources are connected to the same column control line 32.

[0046] It is understood that the substrate 1 in this embodiment is mainly used for mounting LED light sources. In the art, it is generally a PCB board or carrier board, etc. Specifically, when the substrate 1 in this embodiment is applied to the display field, it can be used as a display backplane, and when applied to the lighting field, it can be used as a lighting substrate. The substrate 1 in this embodiment includes a substrate body. The shape of the substrate body is not strictly limited and can be square, round, or irregular. The substrate body can be made of rigid material, such as, but not limited to, phenolic paper laminate, epoxy paper laminate, polyester glass mat laminate, epoxy glass cloth laminate, BT resin board, or glass plate; the substrate body can also be made of flexible material, such as, but not limited to, polyester film, polyimide film, or fluorinated ethylene propylene film. In some examples, corresponding circuits can be integrated into or on the substrate body according to application requirements, such as, but not limited to, circuits connected to the LED light source and driving circuits.

[0047] It is understood that the LED light source in this embodiment mainly refers to LED chips in the field of LED displays. In terms of size classification, the LED chips in this embodiment can be at least one of Mini LED chips, Micro LED chips, ordinary LED chips with a size larger than Mini LED chips, or large-size LED chips. In addition, when the specific LED light source is mounted on the substrate 1, in terms of the distribution of LED chip electrodes, it can include at least one of flip-chip LED chips, upright LED chips, and vertical LED chips. Specific installation and other implementation details will not be further described here.

[0048] It is understandable that, such as Figure 2As shown, each dashed box contains four LED light sources arranged in a 2×2 matrix, forming a pixel unit 2. It can be understood that in the row and column arrangement of pixel units 2 on the substrate 1, the number of pixel units 2 in each row or column can be the same or different. That is, the head or tail of each row or column can be aligned or not aligned. Specifically, the number of pixel units 2 in each row or column can be adjusted according to the actual shape of the substrate 1. For example, if the substrate 1 is rectangular, it is preferable to have the same number of pixel units 2 in each column or row, evenly spaced. If it is hexagonal or circular, the rows and columns do not necessarily have the same number of pixel units 2. The specific number can be arranged according to the shape to fill the required area of ​​the substrate 1. More specific situations will not be described further here. In addition to the influence of the shape of the substrate 1, the specific arrangement number can be designed by those skilled in the art according to actual needs. In addition, when the four LED light sources inside a single pixel unit 2 are arranged in a 2×2 matrix, a square arrangement is preferred, but a rectangular arrangement can also be selected according to actual needs. In this embodiment, a square arrangement is mainly used as an example. It can be understood that the distance between two adjacent LED light sources in the row or column direction is the same, so that the LED light sources are arranged evenly with intervals, and the structure is uniform and easy to design.

[0049] It is understood that the red LED light source 21, blue LED light source 22, and green LED light source 23 correspond to four LED chips. The specific type of LED chip can be conventionally used. For example, the blue LED light source 22 and green LED light source 23 can be gallium nitride-based LED chips, while the red LED light source 21 can be a gallium arsenide-based LED chip. It is understood that in this embodiment, the red LED light source 21, blue LED light source 22, and green LED light source 23 mainly refer to the color or wavelength of the ultimately emitted light. The specific chips can be designed by combining other structures. For example, in some other examples, all LED chips in the LED light source can be blue-emitting LED chips. To allow some of the LED chips to emit green and red light respectively, corresponding light conversion layers can be set on the light-emitting surfaces of these LED chips. In this embodiment, the set of LED chips located at the same pixel point can be called a pixel unit 2. See [link to relevant documentation]. Figure 2 As shown in the figure, it will not be described further here.

[0050] It is understood that in this embodiment, among the m×n pixel units, the negative electrodes of the LED light sources of pixel units located in the same row can be uniformly connected to the row control line of the corresponding row, or the positive electrodes of the LED light sources of pixel units in the same row can be uniformly connected to the row control line of the corresponding row. Depending on the different situations mentioned above, the other electrode of the LED light source of the corresponding pixel unit can be connected to the column control line of the same column, as described in more embodiments later. The key point is that the positive and negative electrodes of the LED light source are connected together through control lines set on the substrate, which reduces the number of lines, thereby simplifying the manufacturing process and also helps with heat dissipation.

[0051] In one feasible embodiment, the LED light source is a flip-chip LED. Flip-chip is an integrated circuit packaging technology whose core feature is that the circuit side of the chip faces downwards, reducing the overall product size to meet miniaturization and micro-scale requirements. Details regarding flip-chip technology will not be elaborated further here; those skilled in the art can understand and implement it using existing technologies.

[0052] like Figure 3 As shown, several pads 4 are provided on the front side of the substrate 1. The LED light source is soldered and fixed on the substrate 1 through the pads 4. It can be understood that the + / - pads 4 are connected to the positive and negative terminals of the LED light source, and the other end of the pads is connected to the corresponding control circuit.

[0053] It is understood that the number of pads 4 and their arrangement on the front side of the substrate 1 in this embodiment can be flexibly set according to application requirements. For example, multiple pads 4 can be provided, and the multiple pads 4 can be arranged in an array on the substrate 1. In some examples of this embodiment, the material of the pads 4 can be, but is not limited to, copper, silver, gold, etc. In this embodiment, the pads 4 on the front side of the substrate 1 can be used for, but is not limited to, electrical connection with the positive and negative electrodes of the LED light source, and can also be connected to other electronic devices.

[0054] It is understood that in each pixel unit 2, two green LED light sources 23 are positioned on the diagonal of the 2×2 matrix, and the other two LED light sources are positioned on the other diagonal. This can be either the two green LED light sources 23 in each pixel unit 2 being positioned on the lower left and upper right diagonal of the 2×2 matrix, or the two green LED light sources 23 in each pixel unit 2 being positioned on the upper left and lower right diagonal of the 2×2 matrix. Specifically, in this embodiment, as... Figure 2 and Figure 3 As shown, the two green LED light sources 23 are positioned diagonally at the lower left and upper right positions of the 2×2 matrix, while the red LED light source 21 and the blue LED light source 22 are positioned diagonally at the upper left and lower right positions of the 2×2 matrix. In this embodiment, the red LED light source 21... Figure 3The blue LED light source 22 is positioned in the upper left position of the 2×2 matrix, while the blue LED light source 22 is positioned in the lower right position of the 2×2 matrix. In other embodiments, these positions can be interchanged; for example, ... Figure 4 The diagram shows a second type of partial pad arrangement structure on the front side of the substrate provided in this embodiment. Two green LED light sources 23 are positioned diagonally at the lower left and upper right positions of the 2×2 matrix, while red LED light sources 21 and blue LED light sources 22 are positioned diagonally at the upper left and lower right positions of the 2×2 matrix. The blue LED light source 22 is used in this embodiment... Figure 4 The red LED light source 21 is positioned in the upper left position of the 2×2 matrix, and the red LED light source 22 is positioned in the lower right position of the 2×2 matrix. The above description is only one specific example in this embodiment. In other embodiments, two green LED light sources 23 can also be positioned in the upper left and lower right positions of the 2×2 matrix, such as... Figure 5 The diagram shows a third type of partial pad arrangement structure on the front side of the substrate provided in this embodiment. Two green LED light sources 23 are positioned diagonally at the upper left and lower right positions of the 2×2 matrix, while red LED light sources 21 and blue LED light sources 22 are positioned diagonally at the lower left and upper right positions of the 2×2 matrix. Furthermore, in this embodiment, the red LED light source 21... Figure 5 The blue LED light source 22 is positioned in the lower left corner of the 2×2 matrix, while the blue LED light source 22 is positioned in the upper right corner of the 2×2 matrix; additionally, as... Figure 6 The diagram shown is a schematic of the fourth type of partial pad arrangement structure on the front side of the substrate provided in this embodiment. It shows two green LED light sources 23 positioned diagonally at the upper left and lower right positions of a 2×2 matrix, and two blue LED light sources 22 positioned diagonally at the lower left and upper right positions of the 2×2 matrix. The blue LED light source 22 is used in this embodiment... Figure 6 The red LED light source 21 is positioned in the upper right corner of the 2×2 matrix, while the central LED is positioned in the lower left corner. In general, those skilled in the art can adjust the positions of the LED light sources according to actual needs in the above-described specific implementation. It should be understood that the types and arrangement of the LED light sources within each pixel unit 2 are consistent and will not be further elaborated here.

[0055] Furthermore, it is understood that in this embodiment, "row" and "column" refer to both rows and columns. The terms "row" and "column" are used only as relative descriptions. Those skilled in the art can reverse the direction of a column to create a row, and vice versa; no strict limitations are imposed here. Similarly, row control lines 31 and column control lines 32 are only in relative position. In practice, rows and columns can be interchanged after their directions are changed, and the LED light sources and their positive and negative electrode arrangements within the corresponding pixel can be adjusted accordingly.

[0056] In this embodiment, as Figures 3-7 As shown, where Figure 7 This is a partial structural diagram of the back side of the substrate provided in this embodiment. As mentioned above, the row control lines 31 can be arranged in rows, and the negative electrodes of the LED light sources of the corresponding row of pixel units 2 are connected through the corresponding pads 3. In this embodiment, for example... Figures 3-7 The row control line 31 is arranged in rows as a specific embodiment for illustration. In this case, the negative terminals of all LED light sources of the pixel unit 2 in each row are connected to the same row control line 31, and the positive terminals of LED light sources of the same color in each column are connected to the same column control line 32. In other embodiments, more specific situations can be understood and implemented in conjunction with the above description.

[0057] In addition, the corresponding row control lines 31 can be interconnected when necessary, so that the negative terminals of all LED light sources can be connected and controlled through a unified circuit. For example, the ends of all row control lines 31 can be connected. Further details will not be described in detail.

[0058] In this embodiment, as Figure 3 As shown, the row control line 31 is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row. The negative electrodes of the upper and lower LED light sources are interconnected and connected to the row control line 31.

[0059] It is understood that in this embodiment, multiple rows of pixel units 2 are provided, and correspondingly, multiple row control lines 31 are provided on the substrate 1. Specifically, the row control line 31 passes through the middle of the 2×2 matrix of each row of pixel units 2 and is located between the upper and lower rows of LED light sources. The negative electrodes of the upper and lower LED light sources are interconnected and connected to the row control line 31, so that the overall design structure is reasonable and uniform. Preferably, the distance from each LED light source in each row to the corresponding row control line 31 is designed to be the same, which also facilitates the welding arrangement and improves the overall processing efficiency of the LED display screen.

[0060] Furthermore, such as Figures 3-6 As shown, in this embodiment, the substrate 1 is provided with a plurality of column control lines 32 arranged in a row, and the negative terminals of the LEDs of the same color in each column of LEDs are connected to the same column control line 32. More specifically, in this embodiment, the column control line 32 is provided on both sides of each column of LEDs.

[0061] Specifically, with Figure 3For example, in the same column of LED light sources, the positive terminals of the red LED light sources 21 in the upper left of the 2×2 matrix are all connected to the first column control line 321, and the positive terminals of the green LED light sources 23 in the lower left of the 2×2 matrix are all connected to the second column control line 322. The first column control line 321 and the second column control line 322 are located on both sides of the LED light sources in that column. Similarly, the positive terminals of the green LED light sources 23 in the upper right of the 2×2 matrix are all connected to the third column control line 323, and the positive terminals of the blue LED light sources 22 in the lower left of the 2×2 matrix are all connected to the fourth column control line 324. The third column control line 323 and the fourth column control line 324 are located on both sides of the corresponding column of LED light sources. (More...) The pixel units 2 in each column can be understood in accordance with the above description. This arrangement, compared to setting one line for each LED light source, helps reduce the number of lines, decreases the design difficulty of the substrate 1, and simplifies the manufacturing process. It also aids in heat dissipation. If necessary, the column control lines 32 between adjacent pixel units 2 can be merged into one. Referring to the row control line 31, the column control line 32 is set in the middle of the 2×2 matrix of pixel units 2 in each column. The positive electrode of each LED light source in each column is connected to the corresponding column control line 32. Further implementation details are not described here. In general, as... Figures 3-6 The column control line 32 shown is configured such that the positive electrodes of LEDs of different colors are connected separately, which facilitates unified control of LEDs of the same color or in the same matrix position. If the positive electrodes of all LEDs in the same column are connected through a single control line, comprehensive control can be achieved, which also helps to improve control efficiency and further reduce wiring. Each method has its advantages, and those skilled in the art can choose the design according to actual needs.

[0062] In this embodiment, as Figures 8-11 As shown, where Figure 8 This is a schematic diagram of the fifth type of substrate front partial pad arrangement structure provided in this embodiment. Figures 9-11 These are schematic diagrams of the sixth, seventh, and eighth types of partial pad arrangement structures on the front side of the substrate provided in this embodiment, and are consistent with the aforementioned... Figures 3-6 The difference is that, Figures 8-11 All positive terminals of the pixel units 2 in each row are connected to the same row control line 31, and the negative terminals of the LEDs of the same color in each column are connected to the same column control line 32.

[0063] Specifically, in this embodiment, the row control line 31 is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row. The positive electrodes of the upper and lower LED light sources are interconnected and connected to the row control line 31. Furthermore, Figures 8-11The diagrams show the column control lines 32 arrangement of the pixel unit 2 structure in four scenarios: top left, top right, bottom left, and bottom right of the red LED light source 21 in a 2×2 matrix. For the correspondence between the row control lines 31 and column control lines 32 in these scenarios, please refer to the previous diagrams. Figures 3-6 The corresponding positive and negative connection relationships need to be understood, but will not be described in detail here.

[0064] Furthermore, in this embodiment, the positive and negative electrodes of the LED light source are connected together through a control line 3 disposed on the substrate 1. Specifically, this may include the positive electrodes of the four LED light sources included in each pixel unit 2 being connected through the same control line 3, as described above. Figures 3-6 The situation described; or the negative terminals of the four LED light sources are connected through the same control line 3, for example. Figures 8-11 The situation described herein; or the positive and negative electrodes are connected through the same control line 3 respectively. The specific details will not be described further here. In general, it can reduce the layout of the circuit, reduce the design difficulty of the substrate 1 and reduce the number of circuits, thereby simplifying the manufacturing process and also helping with heat dissipation.

[0065] In this embodiment, as Figure 2 As shown, the distance between any two adjacent LED light sources in the row and column directions is P, where 0.1mm ≤ P ≤ 20mm. Furthermore, in this embodiment, the specific selectable LED chip size can be a chip length of 0.01mm ≤ L ≤ 10mm and a chip width of 0.01mm ≤ W ≤ 10mm, which facilitates the reasonable design of pixel density.

[0066] In this embodiment, as Figure 2 As shown, an intermediate pixel unit 5 (circular dashed line portion) is formed between two adjacent pixel units 2 located in the same row or column. Each intermediate pixel unit 5 consists of four LED light sources arranged in a 2×2 matrix. It can be understood that the intermediate pixel unit 5 is actually also four LED light sources, including one red LED light source 21, one blue LED light source 22, and two green LED light sources 23. The two green LED light sources 23 of each intermediate pixel unit 5 are arranged on one diagonal of the 2×2 matrix, while the red LED light source 21 and the blue LED light source 22 are arranged on the other diagonal.

[0067] Understandably, the pixel unit 2 structure and arrangement used in this embodiment enable any four LED light sources arranged in a 2×2 matrix to form a red LED light source 21, a blue LED light source 22 and two green LED light sources 23. This allows adjacent pixel units 2 to be used to form new pixel units 2, greatly improving pixel density.

[0068] In this embodiment, the row control line 31 and the column control line 32 are located on different sides of the substrate 1. The substrate 1 has conductive holes 11, and the pixel unit 2 is electrically connected to either the row control line 31 or the column control line 32 through the conductive holes 11. Specifically, the row control line 31 is disposed on the front side of the substrate 1, and the column control line 32 is disposed on the back side of the substrate 1. When the pixel unit 2 is disposed on the front side, it can be connected to the column control line 32 on the back side through the conductive holes 11. Alternatively, it can be as follows... Figure 3 and Figure 7 As shown, column control lines 32 are disposed on the front side of substrate 1, and row control lines 31 are disposed on the back side of substrate 1. Conductive holes 11 are provided on both sides of substrate 1, and the pixel unit 2 is electrically connected to the row control lines 31 through the conductive holes 11. In this embodiment, the row control lines 31 are disposed on the back side as an example. Generally, it is preferred that one of the row control lines 31 and the column control lines 32 is located on the front side and the other on the back side, but other configurations are not excluded. The conductive holes 11 can be filled with copper-plated or other metal materials to achieve wire connection, which is a conventional process in this field and will not be further described here.

[0069] By adopting the above technical solution, this utility model has at least the following beneficial effects:

[0070] The LED display screen provided by this utility model has two green LED light sources 23 in each pixel unit 2. Green contains more brightness information, and the visual system has a higher ability to distinguish details of brightness than details of color. Therefore, this layout is beneficial to improving brightness resolution. At the same time, the method of using 2×2 matrix arrangement of LED light sources to form pixel unit 2 in this utility model can produce more pixels with the same area and arrangement density compared with the existing technology of using three LED light sources in a linear arrangement. In addition, the positive and negative electrodes of the LED light sources are connected together through control lines 3 set on the substrate 1, which reduces the number of lines, thereby simplifying the manufacturing process and also helping heat dissipation.

[0071] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An LED display screen, characterized in that, include: A substrate, on which control circuitry is provided; as well as The substrate contains m×n pixel units, which are evenly spaced in rows and columns. Each pixel unit comprises four LED light sources arranged in a 2×2 matrix. Each LED light source has a positive electrode and a negative electrode. The four LED light sources in each pixel unit include one red LED light source, one blue LED light source, and two green LED light sources. The two green LED light sources in each pixel unit are located on one diagonal of the 2×2 matrix, and the one red LED light source and one blue LED light source are located on the other diagonal. The control circuit includes m row control lines and 4n column control lines, wherein: All negative terminals of the pixel units in each row are connected to the same row control line, and the positive terminals of LEDs of the same color in each column are connected to the same column control line; or All positive terminals of the pixel units in each row are connected to the same row control line, and the negative terminals of LEDs of the same color in each column are connected to the same column control line.

2. The LED display screen of claim 1, wherein, The LED light source is a flip-chip LED.

3. The LED display screen of claim 1, wherein, The row control line is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row. The negative electrodes of the upper and lower LED light sources are interconnected and connected to the row control line.

4. The LED display screen of claim 1, wherein, The row control line is located between the upper and lower LED light sources arranged in a 2×2 matrix within each pixel unit in the same row. The positive electrodes of the upper and lower LED light sources are interconnected and connected to the row control line.

5. The LED display screen of claim 1, wherein, Each column of LED light sources has a column control line on both sides.

6. The LED display screen of claim 1, wherein, Two green LED light sources in each pixel unit are positioned on the diagonal of the 2×2 matrix, at the bottom left and top right.

7. The LED display screen according to claim 1, characterized in that, Two green LED light sources in each pixel unit are positioned on the diagonal of the 2×2 matrix, at the top left and bottom right.

8. The LED display screen according to claim 1, characterized in that, The distance between any two adjacent LED light sources in the row and column direction is P, where 0.1mm ≤ P ≤ 20mm.

9. The LED display screen according to claim 1, characterized in that, An intermediate pixel unit is formed between two adjacent pixel units located in the same row or column, and each intermediate pixel unit consists of four LED light sources arranged in a 2×2 matrix.

10. The LED display screen according to claim 1, characterized in that, The row control line and the column control line are located on different sides of the substrate. The substrate is provided with conductive holes, and the pixel unit is electrically connected to the row control line or the column control line through the conductive holes.

Images