Display module and display device

Abstract

Embodiments of the present application disclose a display module and a display device. The display module comprises a circuit board and a display unit. The circuit board has a front surface. Each group of display units comprises a control device and a pixel point. The front surface of the circuit board comprises a mounting area and pads located around the mounting area. The control device is arranged on the mounting area. The control device is provided with pins in the same number as the pads. Each pin is connected to a pad. The pixel point is arranged on the front surface of the circuit board. The control device is used for controlling the pixel point. The coverage area of the pad on the circuit board is greater than or equal to 0.01 mm2. The distance between adjacent pads on the same mounting area is greater than or equal to 0.1 mm. It can be understood that the size of the pad can be set to be small enough, and the distance between adjacent pads is also set to be small enough. Therefore, the control device can adopt a CSP chip packaging structure and be arranged on the circuit board without being packaged with the pixel point as a whole, so as to be arranged on the circuit board and save material cost.

Description

Technical Field

[0001] This utility model relates to the field of display device technology, and in particular to a display module and display device. Background Technology

[0002] In related technologies, display modules typically include pixels and control devices. As pixels and control devices have become increasingly miniaturized, they are usually mounted together on a carrier board and then packaged into a single package, which is then bonded to a circuit board. With this setup, if any of the control devices or pixels fails, the entire package needs to be repaired or replaced, resulting in high repair costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a display module and display device that can save on repair costs.

[0004] The display module provided in this application adopts the following technical solution:

[0005] A display module, comprising:

[0006] Circuit board, showing the front side;

[0007] Multiple display units are provided, each display unit including a controller and a pixel. The front side of the circuit board includes a mounting area and pads around the mounting area. The controller is located in the mounting area and has a number of pins equal to the number of pads. Each pin is connected to a pad. The pixel is located on the front side of the circuit board. The controller is used to control the pixel.

[0008] Wherein, the area covered by the pad on the circuit board is greater than or equal to 0.01 mm², and the spacing between adjacent pads in the same mounting area is greater than or equal to 0.1 mm.

[0009] According to some embodiments of this utility model, the pixel and the control device are both independent devices.

[0010] According to some embodiments of the present invention, one of the control devices is electrically connected to a plurality of the pixels to control the plurality of the pixels.

[0011] According to some embodiments of the present invention, one of the control devices is connected to 2n pixels, where n is a positive integer greater than or equal to 2.

[0012] According to some embodiments of the present invention, the pixel includes a red LED chip, a green LED chip, and a blue LED chip.

[0013] According to some embodiments of the present invention, a plurality of pixels are arranged around the controller on the front side of the circuit board, and the plurality of pixels are electrically connected to one of the controllers at its center.

[0014] According to some embodiments of the present invention, the control device includes an input port, an output port, and a data port;

[0015] The circuit board is provided with a control circuit, which connects the control devices sequentially. The data port of the preceding control device is electrically connected to the input port of the following control device through the control circuit, and the output port of the preceding control device is electrically connected to the data port of the following control device through the circuit.

[0016] According to some embodiments of the present invention, the control circuit includes multiple sub-circuits, each of which is electrically connected to three sequentially adjacent control devices. Along the direction in which the control devices are sequentially connected, each of the sub-circuits is sequentially electrically connected to the output port, the data port, and the output port.

[0017] According to some embodiments of the present invention, the control device includes a data port and an output port;

[0018] The circuit board is provided with a control circuit, which connects the control devices in sequence. The output port of the previous control device is electrically connected to the data port of the next control device through the control circuit.

[0019] Secondly, this application also discloses a display device, including the aforementioned display module.

[0020] As can be seen from the above technical solution, this utility model has the following advantages: the coverage area of ​​the pads on the circuit board is greater than or equal to 0.01 mm², and the spacing between adjacent pads is greater than or equal to 0.1 mm. Therefore, the size of the pads can be set sufficiently small, and the spacing between adjacent pads can also be set sufficiently small. Thus, the control device can be packaged using a chip-level packaging structure. Simultaneously, the pixels can adopt common packaging methods, such as through-hole packaging or surface mount device packaging.

[0021] Understandably, the controller occupies less space on the circuit board, and the pads can be compactly located around the controller, saving space. Furthermore, the controller can be packaged using a chip-level package structure, while the pixels can use common package structures. Therefore, the controller and pixels can be packaged independently before being bonded to the circuit board. This independent packaging not only saves on the material cost of the packaging substrate but also, because the controller and pixels are integrated separately on the circuit board, the bonding between them and manufacturing yield is loosened, indirectly saving on rework costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the connection structure between a controller and a pad disclosed in an embodiment of this application;

[0024] Figure 2 This is a diagram showing the arrangement of pixels on a light board for a control device disclosed in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of a control circuit disclosed in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of another control circuit disclosed in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the display device disclosed in the embodiments of this application.

[0028] 10. Display unit; 20. Display device; 100. Circuit board; 110. Front side; 111. Mounting area; 120. Control circuit; 130. Sub-circuit; 140. Pad; 200. Display unit; 210. Controller; 211. Input port; 212. Data port; 213. Output port; 220. Pixel. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0031] 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.

[0032] This application discloses a display module 10, please refer to... Figure 1 and Figure 2 The system includes a circuit board 100 and multiple display units 200. The circuit board 100 has a front side 110. Each display unit 200 includes a controller 210 and pixels 220. The front side 110 of the circuit board 100 includes a mounting area 111 and pads 140 located around the mounting area 111. The controller 210 is disposed in the mounting area 111 and has the same number of pins as the pads 140. Each pin is connected to a pad 140. The pixels 220 are disposed on the front side 110 of the circuit board 100. The controller 210 is used to control the pixels 220. The coverage area of ​​the pads 140 on the circuit board 100 is greater than or equal to 0.01 mm², and the spacing between adjacent pads 140 in the same mounting area 111 is greater than or equal to 0.1 mm.

[0033] Specifically, the pads 140 cover an area of ​​0.01 mm² or greater on the circuit board 100, and the spacing between adjacent pads 140 is 0.1 mm or greater. Therefore, the size of the pads 140 can be set sufficiently small, and the spacing between adjacent pads 140 can also be set sufficiently small. Thus, the controller 210 can be packaged using a chip-level packaging structure. Meanwhile, the pixels 220 can adopt common packaging methods, such as through-hole packaging or surface-mount packaging.

[0034] Understandably, the controller 210 occupies a small space on the circuit board 100, and the pads 140 can be compactly located around the controller 210, saving application space on the circuit board 100. Simultaneously, the controller 210 can be packaged using a chip-level packaging structure, while the pixel 220 can use a common packaging structure. Therefore, the controller 210 and pixel 220 can be packaged independently and then bonded to the circuit board 100. The independent packaging structure of the controller 210 and pixel 220 not only saves on the material cost of the packaging substrate but also, because the controller 210 and pixel 220 are discretely integrated on the circuit board 100, the bonding between them and the manufacturing yield is removed, indirectly saving rework costs.

[0035] In some embodiments, please refer to Figure 1 and Figure 2 Pixel 220 and controller 210 are both independent devices, meaning they are each independently packaged and mounted on circuit board 100. Specifically, pixel 220 includes a red LED chip, a green LED chip, and a blue LED chip. The three LED chips of different colors are integrated and packaged into one device, and by controlling the brightness ratio of the three LED chips, pixel 220 can emit different colors of light after mixing.

[0036] It is understandable that the pixel 220 and the controller 210 are independently packaged on the circuit board 100, and are separate components. Therefore, when either the pixel 220 or the controller 210 is damaged, during the rework of the circuit board 100, the operator only needs to repair the damaged pixel 220 or the controller 210, reducing the repair difficulty of the circuit board 100 and lowering costs. If the pixel 220 and the controller 210 were packaged as a single unit, when either the pixel 220 or the controller 210 is damaged, both the pixel 220 and the controller 210 would require maintenance, which could easily lead to higher costs.

[0037] In some embodiments, please refer to Figure 1 and Figure 2 A controller 210 is electrically connected to multiple pixels 220 to control the pixels 220. Specifically, one controller 210 is connected to 2n pixels 220, where n is a positive integer greater than or equal to 2. For example, one controller 210 may be connected to four pixels 220, six pixels 220, or eight pixels 220. The controller 210 is used to control four core parameters of the pixels 220: brightness, color, refresh rate, and operating timing.

[0038] Understandably, one controller 210 controls multiple pixels 220, simplifying design, reducing costs, improving stability, and optimizing performance. 1. Simplified Hardware Design and Layout: Reducing the number of controllers 210 significantly reduces chip space on the circuit board 100. Reduced wiring complexity lowers PCB design difficulty and manufacturing error risks, making products easier to miniaturize. 2. Reduced Overall Costs: Reducing the procurement of core chips directly lowers material costs, especially advantageous in large-size displays and multi-pixel scenarios. Simplified production processes reduce soldering and debugging steps, lowering manufacturing costs and yield loss risks. 3. Improved System Stability and Compatibility: Reducing signal interaction nodes between devices lowers signal interference and failure probability, improving overall reliability. Unified control logic facilitates software adaptation and version iteration, reducing system compatibility difficulties. 4. Optimized Performance and Power Consumption: Centralized management of pixel drive timing ensures image synchronization, reducing ghosting and misalignment issues; a unified power management strategy optimizes energy distribution among pixels 220, reducing overall power consumption.

[0039] In some embodiments, the front side 110 of the circuit board 100 is provided with a plurality of pixels 220 around the controller 210, and the plurality of pixels 220 are electrically connected to a controller 210 at its center. More precisely, a controller 210 is connected to the pixels 220 arranged around its perimeter.

[0040] Understandably, the controller 210 is located among multiple pixels 220 and can be electrically connected to them. This arrangement serves several purposes: First, it reduces product size and optimizes structural design, facilitating a smaller pixel pitch: This layout eliminates the need for a large, dedicated mounting area 111 for the controller 210, effectively saving board space. Second, this design significantly reduces the physical size of pixel units, driving a continuous reduction in pixel pitch and creating conditions for high-density, high-partition displays. For example, in displays with a pixel pitch of less than 2 mm, this layout combined with a high line scan design allows for more pixel components to be accommodated per unit area. Third, it enables thinner and lighter terminals: For products with stringent size requirements, such as wearable devices and mini-displays, placing the controller 210 among multiple pixels 220 reduces the space occupied by peripheral circuitry, allowing the circuit board 100 to be made smaller and more compact, making the terminal product more in line with the market demand for thinner and lighter designs. Secondly, it enhances display performance and ensures image quality: It enables precise control and independent adjustment. This layout allows the controller 210 to control multiple pixels 220 at close range. For example, some solutions can achieve single-point control, allowing each pixel 220 to independently display different colors and brightness. This accurately reproduces image colors, presenting richer color levels and delicate image details, and easily achieves complex dynamic effects such as flowing water and gradients, enhancing the visual experience. It also reduces signal and brightness loss. The shorter distance between the controller 210 and the pixels 220 reduces delays and attenuation in the control signal transmission process, allowing for more timely refresh of pixel status and ensuring smooth, lag-free display. Compared to long-distance driving, close-range driving reduces brightness loss, and combined with static driving and other methods, it also avoids screen flicker, making the display more stable. Thirdly, it reduces production and usage costs. It streamlines materials and procurement costs: One controller 210 controls multiple pixels 220, reducing the total number of controllers 210 used. It also reduces the number of supporting components such as current setting resistors, simplifying the BOM list and reducing procurement and inventory management pressure. Fourth, reduced production and maintenance costs: This layout reduces the number of traces on the circuit board 100, simplifying the wiring process and reducing the risk of production failures such as short circuits and open circuits caused by complex wiring. It also reduces the costs associated with increasing the number of layers on the circuit board 100. Furthermore, with fewer traces and components, troubleshooting and repair are easier when products malfunction, further reducing maintenance costs. Fifth, enhanced adaptability and improved development efficiency: This layout is highly adaptable, easily handling display scenarios with dozens or even thousands of pixels 220 through cascading control and other methods. For example, in display scenarios requiring a large number of high-brightness pixels 220, such as 220 pixel billboards and colored traffic signs, it meets the needs of large-scale pixel control while accelerating project development with its simple circuit design. Simultaneously, the streamlined circuit and component design simplifies product debugging, further improving project development and production efficiency.

[0041] In some embodiments, please refer to Figure 2 and Figure 3 The controller 210 includes an input port 211, an output port, and a data port 212. The circuit board 100 is provided with a control circuit 120, which connects the controllers 210 sequentially. Specifically, the data port 212 of the preceding controller 210 is electrically connected to the input port 211 of the following controller 210 via the control circuit 120, and the output port of the preceding controller 210 is electrically connected to the data port 212 of the following controller 210 via the control circuit 120. The control circuit 120 includes multiple sub-circuits 130, each sub-circuit 130 being electrically connected to three sequentially adjacent controllers 210. Along the direction of sequential connection of the controllers 210, each sub-circuit 130 is sequentially electrically connected to the output port, the data port 212, and the output port, respectively.

[0042] The input port 211 receives the main data signal from the package of the previous controller 210 and generates its phase shift data signal, i.e., the main data signal of the package of the next controller 210, through the internal circuit of the controller 210, which is then output by the output port node. The data port 212 receives the main data signal and, through the operation of the internal circuit of the controller 210, outputs a timing waveform with grayscale description, which is then output to the electrode connection point of pixel 220. The output port outputs the main data signal of the next controller 210, which is connected to the data port 212 node of the next controller 210 and the subsequent operation of the internal circuit of the controller 210.

[0043] Instead of the circuit setup described above, in some embodiments please refer to [reference needed]. Figure 2 and Figure 4 The controller 210 includes a data port 212 and an output port; the circuit board 100 is provided with a control circuit 120, which connects the controllers 210 sequentially. The output port of the preceding controller 210 is electrically connected to the data port 212 of the following controller 210 via the control circuit 120. For example, the control circuit 120 includes multiple sub-circuits 130, each sub-circuit 130 being connected to the data port 212 and the output port of the adjacent controller 210.

[0044] The data port 212 is used to receive the main data signal and, through the operation of the internal circuit of the controller 210, output a timing waveform with grayscale description to the electrode connection point of the pixel 220. The output port outputs the main data signal of the next controller 210, which is connected to the data port 212 of the next controller 210 and the operation of the internal circuit of the subsequent controller 210.

[0045] This application also discloses a display device 20, and see also [reference needed]. Figure 5 The display module 10 mentioned above is included. Multiple display modules 10 are provided, and multiple display modules 10 are spliced ​​together to form a display device 20.

[0046] Specifically, the pads 140 cover an area of ​​0.01 mm² or greater on the circuit board 100, and the spacing between adjacent pads 140 is 0.1 mm or greater. Therefore, the size of the pads 140 can be set sufficiently small, and the spacing between adjacent pads 140 can also be set sufficiently small. Thus, the controller 210 can be packaged using a chip-level packaging structure. Meanwhile, the pixels 220 can adopt common packaging methods, such as through-hole packaging or surface-mount packaging.

[0047] Understandably, the controller 210 occupies a small space on the circuit board 100, and the pads 140 can be compactly located around the controller 210, saving application space on the circuit board 100. Simultaneously, the controller 210 can be packaged using a chip-level packaging structure, while the pixel 220 can use a common packaging structure. Therefore, the controller 210 and pixel 220 can be packaged independently and then bonded to the circuit board 100. The independent packaging structure of the controller 210 and pixel 220 not only saves on the material cost of the packaging substrate but also, because the controller 210 and pixel 220 are discretely integrated on the circuit board 100, the bonding that affects manufacturing yield is removed, indirectly saving rework costs.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A display module, characterized in that, include: Circuit board, showing the front side; Multiple display units are provided, each display unit including a controller and a pixel. The front side of the circuit board includes a mounting area and pads around the mounting area. The controller is located in the mounting area and has a number of pins equal to the number of pads. Each pin is connected to a pad. The pixel is located on the front side of the circuit board. The controller is used to control the pixel. Wherein, the area covered by the pad on the circuit board is greater than or equal to 0.01 mm², and the spacing between adjacent pads in the same mounting area is greater than or equal to 0.1 mm.

2. The display module according to claim 1, characterized in that, The pixels and the controller are both independent devices.

3. The display module according to claim 1, characterized in that, One of the controllers is electrically connected to the plurality of pixels to control the plurality of pixels.

4. The display module according to claim 1, characterized in that, One of the controllers is connected to 2n of the pixels, where n is a positive integer greater than or equal to 2.

5. The display module according to claim 1, characterized in that, The pixels include red LED chips, green LED chips, and blue LED chips.

6. The display module according to claim 1, characterized in that, The front side of the circuit board has a plurality of pixels arranged around the controller, and the plurality of pixels are electrically connected to one of the controllers located at its center.

7. The display module according to any one of claims 1 to 6, characterized in that, The controller includes an input port, an output port, and a data port; The circuit board is provided with a control circuit, which connects the control devices sequentially. The data port of the preceding control device is electrically connected to the input port of the following control device through the control circuit, and the output port of the preceding control device is electrically connected to the data port of the following control device through the circuit.

8. The display module according to claim 7, characterized in that, The control circuit includes multiple sub-circuits, each of which is electrically connected to three sequentially adjacent control devices. Along the direction in which the control devices are sequentially connected, each of the sub-circuits is sequentially electrically connected to the output port, the data port, and the output port.

9. The display module according to any one of claims 1 to 6, characterized in that, The controller includes a data port and an output port; The circuit board is provided with a control circuit, which connects the control devices in sequence. The output port of the previous control device is electrically connected to the data port of the next control device through the control circuit.

10. A display device, characterized in that, Includes the display module described in any one of claims 1 to 9.

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