Small dot pitch interactive module

Abstract

The present application relates to a kind of small dot spacing interactive module, including multiple small dot spacing LED display module, each small dot spacing LED display module includes display component, capacitor component, COT component, display component includes display piece and inductive controller, inductive controller is installed on display piece;Display piece includes LED lamp plate and multiple LED lamp beads arranged in matrix, multiple LED lamp beads are divided into multiple display regions, capacitor component includes multiple inductive capacitor plate and multiple electrical connectors, each inductive capacitor plate is equipped with curve type inductive coil, each curve type inductive coil corresponds inductive capacitor plate and is as a capacitive touch unit, COT component includes multiple insulating pieces and COT membrane plate, the insulating piece is located between the inductive capacitor plate and the LED lamp plate, each electrical connector is connected curve type inductive coil and connects inductive controller, COT membrane plate seals display component surface and the outermost surface of display component to assemble complete small dot spacing LED display module.

Description

Technical Field

[0001] This invention relates to the field of LED module technology, and more specifically to a small-pitch interactive module. Background Technology

[0002] Traditional LED displays primarily utilize infrared and radar sensing for interactive functions. For large-pitch LED products, capacitive interaction relies on contact via sensor pins. However, for small-pitch (P2.6 and below) modules, one approach for interactive products is to use infrared sensing chips. However, the installation size of these chips is affected by the distance between the LEDs. When the LED spacing is small, standard infrared chips are insufficient, requiring custom-made chips for infrared interaction. Different small-pitch interactive modules require different sized infrared chips, necessitating frequent size changes. Furthermore, since infrared chips transmit and receive infrared light, existing infrared sensing solutions use 940nm wavelength reflective sensors, installed in pairs. This results in a small sensing area, a large blind zone, and a limited infrared radiation range. Moreover, the space occupied by the LEDs further restricts the sensing range. Based on these factors, we have developed a small-pitch interactive module. This principle is suitable for conventional touch scenarios, enabling interactive touchscreen displays on vertical surfaces or, with the addition of a base casing, floor tile displays, making it applicable to a wide range of scenarios. Summary of the Invention

[0003] In view of this, a small-pitch interactive module is provided, which features sensitive touch control, wider touch coverage, fewer touch dead zones, improved mechanical performance, and stable and reliable structure, aiming to solve the problems in the existing technology.

[0004] A small-pitch interactive module includes multiple small-pitch LED display modules; each small-pitch LED display module includes a display component, a capacitor component, and a COT component. The display component includes a display element and a sensing controller, with the sensing controller mounted on the display element. The display element includes an LED light board and multiple LED beads arranged in a matrix, each of the multiple LED beads being divided into multiple display areas. The capacitor component includes multiple sensing capacitor plates and multiple electrical connectors. Each sensing capacitor plate is provided with a curved induction coil. Each display area has multiple display sub-areas, and each display sub-area is provided with one of the sensing capacitor plates. The curved induction coils on the sensing capacitor plate are arranged in a meandering manner throughout the corresponding display sub-area. Each curved induction coil serves as a capacitive touch unit on the sensing capacitor plate. The COT assembly includes multiple insulating components and a COT film. The insulating components are disposed between the sensing capacitor plate and the LED light board. The sensing capacitor plate is respectively disposed on the insulating components. Each electrical connector passes through the insulating component and the LED light board. Each electrical connector is connected to a curved induction coil and to a sensing controller. The COT film seals the surface of the display assembly and the outermost surface of the display assembly to assemble a complete small-pitch LED display module.

[0005] In some preferred embodiments, each of the curved induction coils includes a positive coil and a negative coil; the positive coil has a multi-bend S-shaped trajectory and is positioned to correspond to the entire display sub-area except for a predetermined edge distance; the negative coil includes edge windings corresponding to the edges of each display sub-area and a plurality of negative line segments extending from the edge windings; the plurality of negative line segments extend into the gaps between the multi-bend S-shaped trajectories of the positive coil, such that each S-shaped portion of the positive coil and a negative line segment constitute the positive and negative terminals of a capacitor.

[0006] Preferably, each of the sensing capacitor plates includes a substrate, a positive electrode plate of the sensing capacitor, and a negative electrode plate of the sensing capacitor. The substrate is a fiberglass board, and both the positive electrode plate and the negative electrode plate of the sensing capacitor are copper-clad laminates. The positive electrode plate and the negative electrode plate of the sensing capacitor are respectively pressed onto the front and back sides of the substrate to form the sensing capacitor plate.

[0007] Specifically, the positive and negative coils are formed on the positive plate of the sensing capacitor, the side winding of the negative coil passes around the side of the substrate and is connected to the negative plate of the sensing capacitor, and the side winding of the negative coil is wound around the four edges of the substrate and corresponds to the four edges of the corresponding display sub-area.

[0008] Specifically, each of the positive plates of the sensing capacitor is etched to form a curved sensing coil, each of the curved sensing coils corresponds to a touch area, and the multiple touch areas are evenly distributed in the display area of ​​each display component.

[0009] Specifically, the curved induction coils on the positive and negative plates of the sensing capacitor are connected to electrical connectors. The sensing controller includes multiple sensing IC chips. Each curved induction coil is connected to a sensing IC chip via an electrical connector, thereby making the positive and negative plates of the sensing capacitor a capacitive touch unit. The multiple sensing IC chips are respectively installed on the back of the LED light board.

[0010] Specifically, the multiple electrical connectors are multiple connecting copper wires or connecting copper pillars, each of which passes through the LED light board and the insulating component. The two ends of the connecting copper wires or connecting copper pillars are respectively connected to the induction controller and the induction capacitor board to form an induction circuit.

[0011] Furthermore, it also includes a fixing component, wherein the insulating component is a plurality of PC insulating sheets, the fixing component includes a plurality of fixing studs, the plurality of PC insulating sheets are respectively arranged and mounted on the LED light board as a shielding layer, and the sensing capacitor board and the plurality of PC insulating sheets are mounted on the display component by the plurality of fixing studs.

[0012] Preferably, the COT film includes COT adhesive, which is attached to the positive electrode plate of the sensing capacitor and the surface of the LED beads by the osmotic pressure of the optical film to form a PC film. The COT adhesive is also filled between the display component and the capacitor component to seal the small-pitch LED display module.

[0013] In some specific implementations, the shape of the curved induction coil includes, but is not limited to, an S-shape. The induction capacitor board is provided with an LED bead hole for each LED bead. The linewidth of the curved induction coil is greater than the diameter of the LED bead hole. The positive coil is etched with a predetermined width and then perforated, and the hole diameter is greater than the diameter of one LED bead.

[0014] The above-mentioned small-pitch interactive modules have at least the following advantages:

[0015] 1. The sensor capacitor board is used and a curved induction coil is provided; each curved induction coil corresponds to a capacitive touch unit on the sensor capacitor board and basically covers the entire display sub-area, resulting in a wider touch coverage and greatly reducing touch dead zones;

[0016] 2. The COT assembly includes multiple insulating components and a COT film. The COT film seals the surface of the display assembly and the outermost surface of the display assembly to assemble a complete small-pitch LED display module. After COT treatment, the LED lamp board and the sensing capacitor board form a COT film on their surfaces, which enhances the mechanical properties of the display surface, increases its strength, and makes it suitable for frequent touch control. In particular, it has better reliability for foot-operated touch control on floor tiles. It is sturdy and durable, and has good temperature resistance and weather resistance, making it especially suitable for outdoor large display screens.

[0017] 3. The COT film can effectively strengthen the panel structure of the solidified display component, making the LED light board and the sensing capacitor board structure stable. The LED light board is designed to be smaller than the conventional size, with high precision. The module is assembled with special fixtures, and the size consistency is good. It can be used for conventional facade displays, floor tile displays, and is also suitable for indoor and outdoor small-pitch displays. Attached Figure Description

[0018] Figure 1 This is a three-dimensional exploded structure diagram of the small-pitch interactive module provided in an embodiment of the present invention.

[0019] Figure 2 This is a rear view of the small-pitch interactive module provided in an embodiment of the present invention.

[0020] Figure 3 for Figure 2 A cross-sectional structural diagram of section AA.

[0021] Figure 4 for Figure 3 A magnified schematic diagram of part of the BB section.

[0022] Figure 5 This is a three-dimensional structural diagram of the display device, capacitor assembly, insulating component, and fixing component provided in an embodiment of the present invention.

[0023] Figure 6 This is a planar schematic diagram of a capacitor assembly provided in an embodiment of the present invention.

[0024] Figure 7 for Figure 6 A partially enlarged schematic diagram of lead B.

[0025] In the attached diagram: 100, small dot pitch interactive module; 10, display component; 11, display element; 111, LED light board; 112, LED beads; 113, mounting hole; 12, induction controller; 12a, induction IC chip; 20, capacitor assembly; 21, induction capacitor board; 211, substrate; 212, positive electrode plate of induction capacitor; 213, negative electrode plate of induction capacitor; 214, solder pad; 215, fixing hole; 216, LED bead hole; 22, electrical connector; 22a, connecting copper pillar; 23, curved induction coil; 231, positive coil; 232, negative coil; 2321, edge winding; 2322, negative line segment; 30, COT assembly; 31, insulating component; 311, PC insulating sheet; 312, connecting hole; 32, COT film; 32a, PC film; 40, fixing component; 40a, fixing stud. Detailed Implementation

[0026] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0027] Please see Figures 1-7 This illustration shows an embodiment of the present invention providing a small-pitch interactive module 100, comprising multiple small-pitch LED display modules; each small-pitch LED display module includes a display component 10, a capacitor component 20, and a COT component 30. The display component 10 includes a display element 11 and a sensing controller 12, the sensing controller 12 being mounted on the display element 11; the display element 11 includes an LED light board 111 and multiple LED beads 112 arranged in a matrix, the multiple LED beads 112 being divided into multiple display areas; the capacitor component 20 includes multiple sensing capacitor plates 21 and multiple electrical connectors 22, each sensing capacitor plate 21 being provided with a curved induction coil 23; each display area has multiple display sub-areas, each display sub-area being provided with a sensing capacitor. The display module 21 has curved induction coils 23 arranged in a meandering manner on each of the induction capacitor plates 21, which are located in the corresponding display sub-area. Each curved induction coil 23 serves as a capacitive touch unit on the induction capacitor plate 21. The COT assembly 30 includes multiple insulating members 31 and COT film plates 32. The insulating members 31 are located between the induction capacitor plates 21 and the LED light plate 111. The induction capacitor plates 21 are respectively located on the insulating members 31. Each electrical connector 22 passes through the insulating member 31 and the LED light plate 111. Each electrical connector 22 is connected to the curved induction coil 23 and connected to the induction controller 12. The COT film plate 32 encloses the surface of the display assembly 10 and the outermost surface of the display assembly 10 to assemble a complete small-pitch LED display module.

[0028] In some preferred embodiments, a plurality of LED beads 112 are mounted on the front side of the LED light panel 111 in a dot matrix structure, and the plurality of LED beads 112 form a display color unit.

[0029] Furthermore, each of the curved induction coils 23 includes a positive coil 231 and a negative coil 232; the positive coil 231 has a multi-bend S-shaped trend and is arranged in a position corresponding to the entire display sub-area except for a predetermined edge distance; the negative coil 232 includes an edge winding 2321 arranged corresponding to the edge of each display sub-area and a plurality of negative line segments 2322 extending from the edge winding 2321; the plurality of negative line segments 2322 respectively extend into the gaps between the multi-bend S-shaped trends of the positive coil 231, so that each S-shaped portion of the positive coil 231 and a negative line segment constitute the positive and negative poles of a capacitor.

[0030] Preferably, each of the sensing capacitor plates 21 includes a substrate 211, a positive electrode plate 212 and a negative electrode plate 213. The substrate 211 is a fiberglass board, and the positive electrode plate 212 and the negative electrode plate 213 are both copper-clad laminates. The positive electrode plate 212 and the negative electrode plate 213 are pressed onto the front and back sides of the substrate 211 respectively to form the sensing capacitor plate 21.

[0031] In some preferred embodiments, the positive coil 231 and the negative coil 232 are formed on the positive plate 212 of the sensing capacitor, the edge winding of the negative coil 232 passes around the side of the substrate 211 and is connected to the negative plate 213 of the sensing capacitor, and the edge winding of the negative coil 232 is wound around the four edges of the substrate 211 and corresponds to the four edges of the corresponding display sub-region.

[0032] Preferably, each of the positive electrode plates 212 of the sensing capacitor is formed by etching to form a curved induction coil 23; each of the LED light panels 111 is uniformly arranged to form a touch area corresponding to the curved induction coil 23, and the multiple touch areas are uniformly distributed in the display area of ​​each display component 10.

[0033] Preferably, the sensing controller 12 includes a plurality of sensing IC chips 12a, which are respectively arranged and mounted on the back of the LED light board 111. The sensing IC chips 12a are used to drive and manage the capacitor assembly 20.

[0034] In some preferred embodiments, the sensing capacitor plate 21 is provided with a plurality of pads 214 corresponding to the electrical connectors 22. The pads 214 are used to solder the electrical connectors 22. The plurality of electrical connectors 22 are respectively soldered to the sensing capacitor plate 21 through the pads 214. The sensing controller 12 includes a plurality of sensing IC chips 12a. The plurality of sensing IC chips 12a are respectively mounted on the back of the LED light board 111. The curved induction coil 23 is connected to the sensing IC chip 12a as a contact circuit. When the electromagnetic field between the electrode +GND circuit of the curved induction coil 23 changes, the curved induction coil 23 triggers the sensing mechanism and transmits the signal to the sensing IC chip 12a.

[0035] In some specific implementations, the LED light panel 111 is a display module with a unit size of 250*250mm, the sensing IC chip 12a requires four 4-channel capacitive sensing IC chips 12a, the two sensing capacitor plates 21 are sensing modules with a unit size of 125*125mm, and there are also 16 curved sensing coils 23. Connecting the capacitive sensing IC chips 12a requires 16 curved sensing coils 23. Each curved sensing coil 23 is independent and equivalent to 16 sensing touch points. The negative electrode plate 213 of the sensing capacitor is the ground terminal GND. Each sensing touch point is used for the electromagnetic field between the electrode + GND circuit of the curved sensing coil 23. When the electric field changes, the sensing mechanism is triggered and transmitted to the sensing IC chip 12a.

[0036] Preferably, the plurality of electrical connectors 22 are plurality of connecting copper pillars 22a, each of the connecting copper pillars 22a passing through the LED light board 111 and the insulating component 31 respectively, and the two ends of the connecting copper pillar 22a are respectively connected to the induction controller 12 and the induction capacitor board 21 to form an induction circuit.

[0037] Preferably, the curved induction coils 23 on the positive plate 212 and the negative plate 213 of the sensing capacitor are connected to the electrical connectors 22 respectively, and each of the curved induction coils 23 is connected to a sensing IC chip 12a respectively through the electrical connectors 22, so that the positive plate 212 and the negative plate 213 of the sensing capacitor are used as a capacitive touch unit.

[0038] Specifically, it also includes a fixing component 40, the insulating component 31 is a plurality of PC insulating sheets 311, the fixing component 40 includes a plurality of fixing studs 40a, the display component 11 is provided with mounting holes 113, the sensing capacitor plate 21 is provided with fixing holes 215 corresponding to the mounting holes 113, and the insulating component 31 is provided with corresponding connection holes 312 corresponding to the plurality of mounting holes 113. The sensing capacitor plate 21 and the plurality of PC insulating sheets 311 are insulated and mounted on the display component 11 by the plurality of fixing studs 40a. The plurality of PC insulating sheets 311 are respectively arranged and mounted on the LED light board 111 as a shielding layer. The PC insulating sheets 311 prevent electromagnetic shielding between the display component 10 and the capacitor component 20.

[0039] Specifically, the COT film 32 includes COT adhesive, which is attached to the positive electrode plate 212 of the sensing capacitor and the surface of the LED beads 112 by optical film osmotic pressure to form a PC film 32a. The PC film 32a completely covers the entire sensing capacitor plate 21 to achieve the function of sealing the sensing capacitor plate 21. The COT adhesive is also filled between the display component 10 and the capacitor component 20 to seal the small dot pitch LED display module and thus ensure sealing.

[0040] Furthermore, the shape of the curved induction coil 23 includes, but is not limited to, an S-shape. The induction capacitor plate 21 is provided with an LED bead hole 216 corresponding to each LED bead 112. The line width of the curved induction coil 23 is greater than the diameter of the LED bead hole 216. The positive coil 231 is etched with a predetermined width and then perforated, and its hole diameter is greater than the diameter of one LED bead 112.

[0041] In some specific embodiments, one end of the plurality of fixing studs 40a is mounted on the LED light board 111 through the mounting hole 113, the plurality of fixing studs 40a pass through the sensing capacitor plate 21 through the connecting hole 312, and then the sensing capacitor plate 21 is fixed to the LED light board 111 through the fixing hole 215.

[0042] In the aforementioned small-pitch interactive module, the small-pitch LED display module includes a display component 10, a capacitor component 20, a COT component 30, and a fixing component 40. The display component 10 includes a display element 11 and a sensing controller 12. The sensing controller 12 is mounted on the display element 11. The capacitor component 20 includes multiple sensing capacitor plates 21 and multiple electrical connectors 22. Each sensing capacitor plate 21 includes multiple curved sensing coils 23. Each curved sensing coil 23 is formed by etching the positive electrode plate 212 of the sensing capacitor. This ensures that there are basically no touch blind spots when touching each display area, and the touch response is fast, sensitive, and effective. On the other hand, the COT assembly 30 includes an insulating component 31 and a COT film 32. The insulating component 31 is mounted on the display component 11, and the sensing capacitor plate 21 is mounted on the insulating component 31. The sensing capacitor plate 21 is connected to the sensing controller 12 via an electrical connector 22, which in turn connects to the display component 11. The sensing capacitor plate 21 and the insulating component 31 are mounted on the display component 11 via the fixing component 40. The display assembly 10 is then sealed by the COT film 32 to form a complete small-pitch LED display module. After COT treatment, the LED light board 111 and the sensing capacitor plate 21 form a COT film 32 on their surfaces, which enhances the mechanical properties and strength of the display screen surface. This makes it suitable for frequent touch control, especially for foot-operated touch control on floor tiles, where reliability is better. It is sturdy and durable, and has good temperature and weather resistance, making it particularly suitable for outdoor large display screens. Furthermore, the COT film 32 can effectively enhance the structural stability of the LED light board 111 and the sensing capacitor board 21, making the LED light board 111 smaller than the conventional size, with high precision, and the module is assembled with special fixtures, resulting in good dimensional consistency. It can be used for conventional facade displays, floor tile displays, and is also suitable for indoor and outdoor small-pitch displays.

[0043] It should be noted that the present invention is not limited to the above-described embodiments. Based on the inventive spirit of the present invention, those skilled in the art can make other changes, and these changes made in accordance with the inventive spirit of the present invention should be included within the scope of protection claimed by the present invention.

Claims

1. A small-pitch interactive module, comprising multiple small-pitch LED display modules; characterized in that, Each of the small-pitch LED display modules includes a display component, a capacitor component, and a COT component. The display component includes a display element and a sensing controller, with the sensing controller mounted on the display element. The display element includes an LED light board and multiple LED beads arranged in a matrix, each LED bead being divided into multiple display areas. The capacitor component includes multiple sensing capacitor plates and multiple electrical connectors. Each sensing capacitor plate is provided with a curved induction coil. Each display area has multiple display sub-areas, and each display sub-area is provided with one of the sensing capacitor plates. The curved induction coils on each sensing capacitor plate are arranged in a meandering manner throughout the corresponding display sub-area. Each curved induction coil serves as a capacitive touch unit on the sensing capacitor plate. Each curved induction coil includes a positive coil and a negative coil. The positive coil has a multi-bend S-shaped path. The arrangement of the positive and negative electrode coils corresponds to the entire display sub-area except for the predetermined edge distance. The negative electrode coil includes edge windings corresponding to the edges of each display sub-area and multiple negative electrode segments extending from the edge windings. The multiple negative electrode segments extend into the gaps between the multiple zigzag S-shaped paths of the positive electrode coil, so that each S-shaped portion of the positive electrode coil and a negative electrode segment form the positive and negative electrodes of a capacitor. The COT assembly includes multiple insulating components and a COT film. The insulating components are disposed between the sensing capacitor plate and the LED light plate. The sensing capacitor plates are respectively disposed on the insulating components. Each electrical connector passes through the insulating component and the LED light plate. Each electrical connector is connected to a curved sensing coil and a sensing controller. The COT film seals the surface of the display assembly and the outermost surface of the display assembly to assemble a complete small-pitch LED display module.

2. The small-pitch interactive module as described in claim 1, characterized in that, Each of the inductive capacitor plates includes a substrate, an inductive capacitor positive plate, and an inductive capacitor negative plate. The substrate is a fiberglass board, and both the inductive capacitor positive plate and the inductive capacitor negative plate are copper-clad laminates. The inductive capacitor positive plate and the inductive capacitor negative plate are respectively pressed onto the front and back sides of the substrate to form an inductive capacitor plate.

3. The small-pitch interactive module as described in claim 2, characterized in that, The positive and negative coils are formed on the positive plate of the sensing capacitor. The edge winding of the negative coil passes around the side of the substrate and is connected to the negative plate of the sensing capacitor. The edge winding of the negative coil is wound around the four edges of the substrate and corresponds to the four edges of the corresponding display sub-area.

4. The small-pitch interactive module as described in claim 3, characterized in that, Each of the inductive capacitor positive plates is etched to form a curved inductive coil, and each curved inductive coil corresponds to a touch area. The multiple touch areas are evenly distributed in the display area of ​​each display component.

5. The small-pitch interactive module as described in claim 4, characterized in that, The curved induction coils on the positive and negative plates of the induction capacitor are connected to electrical connectors. The induction controller includes multiple induction IC chips. Each curved induction coil is connected to an induction IC chip via an electrical connector, thereby making the positive and negative plates of the induction capacitor a capacitive touch unit. The multiple induction IC chips are respectively installed on the back of the LED light board.

6. The small-pitch interactive module as described in claim 1, characterized in that, The multiple electrical connectors are multiple connecting copper wires or connecting copper pillars. Each connecting copper wire or connecting copper pillar passes through the LED light board and the insulating component. The two ends of the connecting copper wire or connecting copper pillar are respectively connected to the induction controller and the induction capacitor board to form an induction circuit.

7. The small-pitch interactive module as described in claim 1, characterized in that, It also includes a fixing component, wherein the insulating component is a plurality of PC insulating sheets, the fixing component includes a plurality of fixing studs, the plurality of PC insulating sheets are respectively arranged and mounted on the LED light board as a shielding layer, and the sensing capacitor board and the plurality of PC insulating sheets are mounted on the display component by the plurality of fixing studs.

8. The small-pitch interactive module as described in claim 1, characterized in that, The COT film includes COT adhesive, which is attached to the positive electrode plate of the sensing capacitor and the surface of the LED beads by the osmotic pressure of the optical film to form a PC film. The COT adhesive is also filled between the display component and the capacitor component to seal the small-pitch LED display module.

9. The small-pitch interactive module as described in claim 1, characterized in that, The curved induction coil has a shape including but not limited to S-shape. The induction capacitor board has an LED bead hole for each LED bead. The line width of the curved induction coil is greater than the diameter of the LED bead hole. The positive coil is etched with a predetermined width and then perforated, and the hole diameter is greater than the diameter of one LED bead.

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