A common negative and common positive dual-purpose energy-saving LED lamp panel

Abstract

The utility model discloses a kind of common negative common positive dual-purpose energy-saving LED lamp panels, it includes board body, lamp pearl installation site, drive IC installation site, EMC installation site and power IC installation site are provided on board body and install corresponding element on each position, EMC installation site is located before drive IC installation site, drive IC installation site is communicated with lamp pearl installation site, the common positive of common positive lamp pearl and the common negative of common negative lamp pearl are designed into same position on board body on lamp pearl installation site, when using, directly replace lamp pearl species to realize the adaptation of common positive lamp pearl and common negative lamp pearl PCB, common negative scheme and common positive scheme can be simultaneously compatible, when using common negative scheme, energy-saving function can be realized, reduce display screen energy consumption, with strong function and market promotion competitiveness.

Description

Technical Field

[0001] This utility model belongs to the field of LED light panels and relates to an energy-saving LED light panel that integrates common cathode and common anode functions. Background Technology

[0002] Existing LED chips can be divided into common anode LED chips and common cathode LED chips based on the power supply pins. Generally, different circuit boards are required for different chips to achieve installation. At the same time, depending on the requirements, LED boards also need to be energy-saving and resistant to electromagnetic interference. As a result, conventional LED display products have PCBs with single functions. There is one type of PCB for common cathode solutions, another for common anode solutions, and yet another for EMC-enabled solutions. In other words, each product has only a single function design, resulting in a large number of product styles. When using them, the technical integration level is low, making it difficult to achieve the integration of technological advantages. Furthermore, with too many styles, the PCB manufacturing end and the display product end must configure materials and production jigs separately for each product solution, resulting in high manufacturing costs. Utility Model Content

[0003] The purpose of this utility model is to provide an energy-saving LED light board that integrates common cathode and common anode solutions. It can be compatible with both common cathode and common anode solutions. When using the common cathode solution, it can achieve energy-saving function, reduce the energy consumption of the display screen, and has powerful functions and market competitiveness.

[0004] The technical solution adopted in this utility model is as follows: A common-cathode and common-cathode dual-use energy-saving LED light board includes a board body with LED chip mounting positions, driver IC mounting positions, EMC mounting positions, and power IC mounting positions. Corresponding components are installed at each position. The EMC mounting position is located before the driver IC mounting position and is connected to the LED chip mounting position. The common positive terminal of the common-cathode LED chip and the common negative terminal of the common-cathode LED chip are designed to be in the same position on the board body at the LED chip mounting position. When in use, the PCB board can be adapted to both common-cathode and common-cathode LED chips by simply changing the type of LED chip.

[0005] Furthermore, a filter capacitor and a ferrite core are installed on the EMC mounting position to suppress high-frequency noise, and the EMC is located before the driver IC.

[0006] Furthermore, filter capacitors and ferrite cores are added to the front end of the signal circuit lines of each driver IC.

[0007] Furthermore, the LED mounting positions are arranged repeatedly in the array. Each LED has four pins: red, green, blue, and a positive power supply pin. In the common anode configuration, the red, green, and blue pins are negative and share the positive power supply pin. In the common cathode configuration, the red, green, and blue pins are positive and share the negative power supply pin. The same type of LED is installed on a single board.

[0008] Furthermore, a power IC is installed on the power IC mounting position and designed as a dual power supply mode: In the common anode scheme, a 5V power supply is used, and the power supply of the common positive terminal is 5V voltage; In the common cathode scheme, a dual power supply is used, with the R red light power supply at 3.8V voltage and the G green light and B blue light power supply at 2.8V voltage.

[0009] Furthermore, the driver IC controls the power supply IC to provide different voltages according to the voltage requirements of the LED beads during off-peak hours, thereby achieving energy saving.

[0010] Furthermore, the plate is provided with resistor mounting positions for mounting resistors to share the voltage and achieve voltage reduction.

[0011] Furthermore, one side of the board is provided with a driver IC mounting position, an EMC mounting position, and a power IC mounting position, and the other side of the board is provided with LED mounting positions, which are arranged in a regular array.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. Through research and development, the functions of four solutions—common cathode, common anode, energy-saving, and EMC—are integrated into a single PCB product. This reduces the number of PCB products from at least four to just one. The new PCB product can be customized to offer single-function or multi-function combinations based on customer needs. PCB manufacturers only need to produce one versatile PCB, significantly reducing manufacturing costs. Display screen manufacturers can achieve multiple functions with a single PCB, reducing inventory and manufacturing costs, thus achieving cost reduction and efficiency improvement, and possessing strong functionality and market competitiveness.

[0013] 2. When the LED light board in this utility model is working normally in an electromagnetic environment, it can suppress the electromagnetic interference (EMI) it generates and resist external electromagnetic interference (EMS), ensuring that it will not cause unacceptable interference to other equipment, while ensuring that its own function is not affected. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a structural schematic diagram of an energy-saving LED light panel that integrates common cathode and common anode functions according to this utility model.

[0015] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0016] Figure 3 This is a schematic diagram of the lamp bead mounting surface of a dual-purpose (common cathode and common anode) energy-saving LED lamp board according to this utility model.

[0017] The markings in the diagram are as follows: 1. Board body 101. LED chip mounting position 102. Driver IC mounting position 103. EMC mounting position 104. Power IC mounting position 2. Resistor. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0022] Example 1:

[0023] The preferred embodiment of this utility model provides an energy-saving LED light panel that integrates both common cathode and common anode functions, such as... Figures 1-3 As shown, it includes a board body 1, on which are integrated arrayed LED chip mounting positions 101, driver IC mounting positions 102, EMC mounting positions 103, and power IC mounting positions 104. Each mounting position achieves signal and power connection through preset circuit wiring. The EMC mounting position 103 is located in front of the signal input terminal of the driver IC mounting position 102, and the output terminal of the driver IC mounting position 102 is electrically connected to the LED chip mounting position 101 through a metallized via. The innovative design of the LED chip mounting position 101 is that the common positive electrode pad for common anode LEDs and the common negative electrode pad for common cathode LEDs are designed in the same physical location on the board body 1. The pad diameter is designed to be 0.8mm, compatible with the pin spacing of both types of LEDs. During use, only the type of LED needs to be changed to complete the common cathode / common anode mode switching. LEDs of the same type must be installed uniformly on the same board body 1 to ensure consistent power supply logic. Four positioning holes (3mm in diameter) are also reserved on the edge of the board body 1 for precise positioning during production assembly.

[0024] Ceramic filter capacitors and ferrite cores are specifically installed on EMC mounting position 103 to suppress high-frequency noise through a π-type filter network. This EMC circuit module is located before the signal input of the driver IC, forming a filtering structure: the first stage is common-mode suppression by the ferrite core, the second stage is differential-mode filtering by the capacitor, and the third stage is ESD protection built into the IC. In actual assembly, the filter capacitors need to be placed close to the VCC pin of the driver IC mounting position 102 (spacing ≤ 5mm) to reduce the influence of parasitic inductance. In addition to the above methods, the board 1 also adopts a 2mm wide ground plane design, connecting all EMC component housings to the ground plane through vias to further improve the electromagnetic shielding effect.

[0025] The LED chip mounting position 101 adopts a matrix repeating arrangement, and the center spacing between adjacent LED chips is adjustable. The LED chips selected are models with three primary colors (red, green, and blue) and four pins for the power supply electrode: In the common anode scheme, the red / green / blue pins are negative, and the common positive pin is connected to the 5V output terminal of the power IC mounting position 104 through a 0.5mm wide copper foil; in the common cathode scheme, the red / green / blue pins are positive, and the common negative pin is connected to the power ground plane.

[0026] A power IC is installed in mounting position 104. The IC supports a wide input voltage range of 3.3V-5.5V. Different output modes are selected via an onboard 0Ω resistor: In the common anode configuration, shorting resistor R1 fixes the output at 5V / 3A; in the common cathode configuration, shorting the resistor enables dual outputs, with the R red LED channel outputting 3.8V and the G / B green / blue LED channels outputting 2.8V (set via voltage divider resistors). Multiple power IC mounting positions are reserved on board 1.

[0027] The driver IC communicates with the power supply IC via a bus, employing a time-sharing peak-shaving power supply control logic: when a common cathode mode is detected, the driver IC first outputs a red LED drive signal and controls the power supply IC to output 3.8V in each PWM cycle. Then, it shuts down the R channel and opens the G / B channel, simultaneously switching the power supply IC to output 2.8V. This peak-shaving power supply achieves energy saving, with measured energy consumption reduction of 23% compared to traditional single-power supply schemes. The driver IC supports grayscale adjustment, controlling the brightness of the LED beads by adjusting the PWM duty cycle. Color control is achieved through independent dimming of the three primary colors. Each LED mounting position 101 corresponds to one channel pin of the driver IC, allowing for a 1-to-4 driving method (i.e., one driver IC controls four LED beads). The resistor mounting position specifically houses a current-limiting resistor, connected in series in the negative terminal circuit of the LED bead to ensure stable operating current for each LED bead.

[0028] One side of the board is provided with a driver IC mounting position 102, an EMC mounting position 103 and a power IC mounting position 104, and the other side of the board is provided with an LED mounting position 101, which are arranged in a regular array.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions and improvements made by those skilled in the art within the spirit and principles of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A dual-purpose (common cathode and common anode) energy-saving LED light panel, characterized in that: It includes a board body with LED mounting positions, driver IC mounting positions, EMC mounting positions, and power IC mounting positions. Corresponding components are installed in each position. The EMC mounting position is located before the driver IC mounting position and is connected to the LED mounting position. The common positive terminal of common anode LEDs and the common negative terminal of common cathode LEDs are designed to be in the same position on the board body. When in use, the PCB board can be adapted to common anode LEDs and common cathode LEDs by simply changing the type of LED.

2. The energy-saving LED light panel with both common cathode and common anode as described in claim 1, characterized in that: The EMC mounting position is equipped with a filter capacitor and a ferrite core to suppress high-frequency noise, and the EMC is located before the driver IC.

3. The energy-saving LED light panel with both common cathode and common anode as described in claim 2, characterized in that: Add a filter capacitor and a ferrite core to the front end of the signal circuit lines of each driver IC.

4. The energy-saving LED light panel with both common cathode and common anode as described in claim 1, characterized in that: The LED mounting array is arranged repeatedly. Each LED has four pins: red, green, blue, and a positive power supply pin. In the common anode configuration, the red, green, and blue pins of the LED are negative and share the positive power supply pin. In the common cathode configuration, the red, green, and blue pins of the LED are positive and share the negative power supply pin. The same type of LED is installed on a single board.

5. The energy-saving LED light panel with both common cathode and common anode as described in claim 4, characterized in that: The power IC is installed in the power IC mounting position and designed as a dual power supply mode: In the common anode scheme, a 5V power supply is used, and the power supply of the common positive terminal is 5V voltage; In the common cathode scheme, a dual power supply is used, with the R red light power supply at 3.8V voltage and the G green light and B blue light power supply at 2.8V voltage.

6. The energy-saving LED light panel with both common cathode and common anode as described in claim 1, characterized in that: The driver IC controls the power supply IC to provide different voltages according to the voltage requirements of the LED beads during off-peak hours, thereby achieving energy saving.

7. The energy-saving LED light panel with both common cathode and common anode as described in claim 1, characterized in that: The plate is provided with resistor mounting positions for mounting resistors to share the voltage and achieve voltage reduction.

8. The energy-saving LED light panel with both common cathode and common anode as described in claim 1, characterized in that: One side of the board is provided with a driver IC mounting position, an EMC mounting position and a power IC mounting position, and the other side of the board is provided with LED mounting positions, which are arranged in a regular array.

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