LED device based on mini LED lamp drive integrated design

Abstract

The utility model provides an LED device based on mini LED lamp drive integrated design, which is characterized in that a drive chip and LED chips are arranged on the front surface of a substrate, extraction electrodes are arranged on the back surface of the substrate, and the LED chips comprise mini LED chips; the leading-out electrodes comprise a red light power supply electrode, a blue-green light power supply electrode, a grounding electrode and three communication electrodes, three positive electrodes of the mini LED chip are respectively connected to the driving chip and are respectively and correspondingly connected to the red light power supply electrode and the blue-green light power supply electrode through the driving chip and the conducting holes so as to respectively drive the red light power supply electrode and the blue-green light power supply electrode, and the driving chip is provided with three communication ports. According to the LED device based on the mini LED lamp drive integrated design, the drive chip and the LED chip are both arranged on the front face of the substrate, only one-time surface mounting technology needs to be executed to the production of a backlight plate, and the production cost of downstream manufacturers can be effectively reduced; the red lamp is driven separately, communication channels are multiple, the controllability of the mini LED chip can be improved, and convenience is provided for power consumption regulation and control and light emitting effect regulation and control.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor technology, and in particular to an LED device based on a mini LED lamp driver integrated design. Background Technology

[0002] With the widespread application of display screen technology, the application of LED (light emitting diode) display devices, a key component of display screens, has become more important. In particular, as display screens develop towards higher definition, higher resolution, and higher reliability, higher requirements are placed on LED display devices, namely, achieving high performance and high reliability on smaller LED display elements.

[0003] The mini LED integrated light driver design integrates the RGB (red, green, blue) three-color light-emitting chips and driver chips of the Mini LED chip onto a single substrate. It only requires external power supply and light-emitting data. Each light-emitting unit can be controlled independently, resulting in high display controllability.

[0004] In the existing technology, the conventional approach for integrated lamp and driver display designs is to first attach the driver chip to the back of the PCB (Printed Circuit Board) and then attach the LEDs to the front. This requires downstream module and display manufacturers to perform two mounting processes, which is not conducive to the production cost control of downstream manufacturers. In addition, the components are laid out on both sides, which is not conducive to heat dissipation and wiring design. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide an LED device based on a mini LED integrated lamp driver design, so as to solve the problem that the production of displays with integrated lamp drivers in the prior art requires downstream module and display manufacturers to perform two mounting processes, which is not conducive to the production cost control of downstream manufacturers.

[0006] This utility model provides an LED device based on a mini LED driver integrated design, comprising: a substrate, a driver chip and an LED chip disposed on the front side of the substrate, and lead electrodes disposed on the back side of the substrate. The substrate also has through holes for electrical connection between the front and back sides.

[0007] The LED chip includes a mini LED chip;

[0008] The lead-out electrodes include a red light power electrode, a blue / green light power electrode, a ground electrode, and three communication electrodes. The three positive electrodes of the mini LED chip are respectively connected to the driver chip, and are respectively connected to the red light power electrode and the blue / green light power electrode through the driver chip and the via. The cathode of the mini LED chip and the ground port of the driver chip are also connected in parallel to the ground electrode through the via. The corresponding pins of the driver chip are also connected to the three communication electrodes through the via.

[0009] Optionally, the red light power electrode and the blue-green light power electrode are located at both ends of the longitudinal axis of the substrate. The three communication electrodes include a first input electrode, a second input electrode, and an output electrode. The first input electrode and the second input electrode are located on the first side of the longitudinal axis, and the output electrode and the ground electrode are located on the second side of the longitudinal axis.

[0010] Optionally, the first input electrode and the second input electrode are spaced apart along the extension direction of the longitudinal axis, and the output electrode and the ground electrode are spaced apart along the extension direction of the longitudinal axis, and are symmetrically arranged with respect to both the longitudinal axis and the transverse axis of the substrate.

[0011] Optionally, the grounding electrode is positioned closer to the red light power electrode than the output electrode.

[0012] Optionally, the red light power port and blue-green light power port of the driver chip are respectively led out in a straight line along the extension direction of the longitudinal axis to the corresponding through hole, and the extension direction points to the red light power electrode and the blue-green light power electrode respectively.

[0013] The first input port of the driver chip extends in a straight line to the second side of the longitudinal axis to the corresponding through hole, and the extension direction is parallel to the transverse axis of the substrate.

[0014] The second input port of the driver chip is led out in a straight line along the lead-out direction of the blue-green light power port to the corresponding via, and the extension direction deviates from the extension direction of the lead-out line of the blue-green light power port.

[0015] The output port of the driver chip extends in a straight line to the first side of the longitudinal axis to the corresponding via, and the extension direction is parallel to the transverse axis of the substrate.

[0016] Optionally, the lead-out direction of the blue-green light power port and the lead-out direction of the second input port are respectively offset towards the first side and the second side of the longitudinal axis.

[0017] Optionally, the mini LED chip includes four chips, with the driving chip located at the center of the substrate and the four mini LED chips located at the four corners of the substrate.

[0018] Optionally, the positive electrode of each mini LED chip points to the longitudinal or transverse axis of the substrate, and the negative electrode points outward to the edge. The cathode leads of the four mini LED chips are arranged around the substrate, and the corresponding vias are arranged on the surrounding path of the cathode leads of the mini LED chips.

[0019] Optionally, the ground port lead of the driver chip is connected to the loop path of the cathode lead of the mini LED chip, and the ground port and the red lamp power port of the driver chip are located on the same side of the driver chip and lead out to the same side.

[0020] The LED device based on the integrated design of mini LED lamp driver provided by this utility model includes a substrate. A driver chip and an LED chip are disposed on the front side of the substrate, and lead electrodes are disposed on the back side of the substrate. Conductive holes for electrical connection between the front and back sides are also disposed on the substrate. The LED chip includes a mini LED chip. The lead electrodes include a red light power electrode, a blue-green light power electrode, a ground electrode, and three communication electrodes. The three positive electrodes of the mini LED chip are respectively connected to the driver chip, and are respectively connected to the red light power electrode and the blue-green light power electrode through the driver chip and the conductive holes. The red light with lower operating power is powered separately, which can ensure the driving effect and facilitate power consumption control. The cathode of the mini LED chip and the ground port of the driver chip are also connected in parallel to the ground electrode through the conductive holes. The corresponding pins of the driver chip are also connected to the three communication electrodes through the conductive holes, which have strong communication capabilities and facilitate high-precision brightness control. The LED device based on the integrated mini LED driver design provided by this utility model places both the driver chip and the LED chip on the front side of the substrate, and the lead-out electrodes on the back side of the substrate. Downstream manufacturers only need to mount the LED device onto the display lamp board once, which can effectively reduce the production cost of downstream manufacturers. Driving the low-power red LED separately can facilitate power consumption control and facilitate heat dissipation design. Setting three communication electrodes can increase the data transmission volume and facilitate the separate driving of the mini LED chips. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the front component layout of the LED device in an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the back electrode layout of the LED device in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the front wiring layout of the LED device in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the back electrode wiring layout of the LED device in an embodiment of this utility model.

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] To address the issue that existing displays with integrated lamp and driver designs require downstream module and display manufacturers to perform two mounting processes, hindering cost control, this invention provides an LED device based on a mini LED integrated lamp and driver design. Both the driver chip and LED chip are located on the front side of the substrate, while the lead-out electrodes are located on the back side. Downstream manufacturers only need to mount this LED device onto the display's lamp board once, effectively reducing production costs. The red LED of the mini LED has a lower operating power than the blue and green LEDs, and the blue and green LEDs have similar operating power. Providing a separate power supply for the lower-power red LED facilitates power consumption control and heat dissipation design. The inclusion of three communication electrodes increases data transmission capacity and facilitates separate driving of the three colors of the mini LED chip.

[0030] Specifically, please refer to Figures 1 to 4 The diagram shown is a schematic diagram of the layout design of the LED device in this embodiment. Figure 2 and Figure 4 This is a perspective view from the front to the back. The front side of the substrate 10 is provided with a driver chip 21 and an LED chip 22, and the back side of the substrate 10 is provided with lead electrodes. The substrate 10 is also provided with a through hole 101 for electrical connection between the front and back sides, so as to connect the circuit traces of the driver chip 21 and the LED chip 22 to the lead electrodes on the back side. During mounting, only the back side of the substrate 10 needs to be attached to the backlight board of the display, and a single mounting process is required.

[0031] In this embodiment, the LED chip 22 is mainly a mini LED chip, including RGB three-color light-emitting units, and as shown... Figure 1 and Figure 3 As shown, the three-color light-emitting units of a single LED chip 22 are arranged side by side, and the two poles of each light-emitting unit are led out separately and can be driven separately.

[0032] The lead-out electrodes include a red LED power electrode VDDR, a blue / green LED power electrode VDDGB, a ground electrode GND, and three communication electrodes. The three positive electrodes of the mini LED chip are respectively connected to the driver chip 21, and are respectively connected to the red LED power electrode VDDR and the blue / green LED power electrode VDDGB through the driver chip 21 and the via 101. The cathode of the mini LED chip and the ground port of the driver chip 21 are also connected in parallel to the ground electrode through the via. The corresponding pins of the driver chip 21 are also connected to the three communication electrodes through the via.

[0033] It is understood that this application mainly focuses on integrated circuit layout design, and there are no special restrictions on the specific types of driver chip 21 and LED chip 22. That is, the implementation of this application is not limited by driver chip 21 and LED chip 22, and driver chip 21 and LED chip 22 can be selected or designed according to specific needs.

[0034] To reduce interference between lines, in this embodiment, such as Figure 2 As shown, the red LED power electrode VDDR and the blue-green LED power electrode VDDGB are located at both ends of the longitudinal axis of the substrate 10. Separating the two power electrodes can effectively reduce coupling interference between power wiring.

[0035] The three communication electrodes include a first input electrode SDI0, a second input electrode SDI1, and an output electrode SDO. The first input electrode SDI0 and the second input electrode SDI1 are located on the first side of the longitudinal axis, while the output electrode SDO and the ground electrode GND are located on the second side of the longitudinal axis. This arrangement keeps the power supply electrode and the communication electrode far apart, avoiding coupling interference between the power supply wiring and the communication wiring. Furthermore, the fact that the input electrode and the output electrode are located on opposite sides of the longitudinal axis avoids interference between the input and output, thus improving communication quality.

[0036] Specifically, the first input electrode SDI0 and the second input electrode SDI1 are spaced apart along the extension direction of the longitudinal axis, and the output electrode SDO and the ground electrode GND are spaced apart along the extension direction of the longitudinal axis. They are symmetrically arranged relative to the longitudinal axis and the transverse axis of the substrate, and the electrodes are evenly distributed. When the driver chip 21 is located at the center of the substrate 10, it is convenient to arrange the wiring evenly.

[0037] In mini LED chip driving technology, the driving voltage and current for red LEDs are generally lower than those for blue and green LEDs. Correspondingly, in this embodiment, the ground electrode GND is positioned closer to the red LED power supply electrode VDDR than the output electrode SDO, resulting in a lower potential difference between GND and VDDR during operation. Simultaneously, the output electrode SDO typically has a higher potential than ground. Positioning it close to the higher-potential blue and green LED power supply electrode VDDGB further reduces the potential difference between SDO and VDDGB, minimizing electromagnetic interference in the corresponding traces, improving power supply and communication quality, and ultimately enhancing the display quality of the LED device.

[0038] Corresponding to the electrode layout, the leads at each port of the driver chip are mainly arranged based on the principle of proximity. Specifically, in this embodiment, such as... Figure 3 and Figure 4 As shown, the red light power port and blue / green light power port of the driver chip 21 are respectively led out in a straight line along the longitudinal axis to the corresponding via, and the extension direction points to the red light power electrode VDDR and the blue / green light power electrode VDDGB respectively.

[0039] The first input port of the driver chip 21 extends in a straight line to the second side of the longitudinal axis to the corresponding via, and the extension direction is parallel to the transverse axis of the substrate 10; the second input port of the driver chip 21 extends in a straight line along the lead-out direction of the blue-green lamp power port to the corresponding via, and the extension direction deviates from the extension direction of the lead-out line of the blue-green lamp power port.

[0040] The output port of the driver chip 21 extends in a straight line to the first side of the longitudinal axis to the corresponding via, and the extension direction is parallel to the transverse axis of the substrate 21.

[0041] The lead-out directions of the first input port and the output port of the driving chip 21 are opposite to the layout orientations of the first input electrode SDI0 and the output electrode SDO, such that the wiring on the back surface of its substrate 10 is as Figure 4 shown, in a "mutual" shaped layout, which is convenient for extending the length of its wiring, while reducing the electrical signal coupling interference therein, and equalizing the lengths of the three wirings of two inputs and one output. At the same time, when extending the wiring, the line width can be increased, which can reduce the signal attenuation. And extending the wiring can also increase the heat dissipation area and improve the heat dissipation effect.

[0042] Specifically, the lead-out directions of the lead-out wires of the blue and green LED power supply ports and the lead-out wires of the second input port are respectively set to deviate from the first side and the second side of the longitudinal axis. The grounding port of the driving chip 21 is set on the side where the red LED power supply port is set and deviates from the first side of the longitudinal axis, so that the grounding port and the second input port are centrosymmetric in the layout on the driving chip 21, and the red LED power supply port and the blue and green LED power supply ports are centrosymmetric in the layout on the driving chip 21, which is convenient for improving the uniformity of the wiring layout when an even number of ports are set on one side of the driving chip 21.

[0043] To ensure the full utilization of driving resources, in this embodiment, there are four mini LED chips, the driving chip 21 is arranged at the center position of the substrate, and the four mini LED chips are arranged at the four corners of the substrate 21.

[0044] For convenient wiring, in this embodiment, the positive poles of each mini LED chip point to the longitudinal axis of the substrate 21, the negative poles point outwards to the side lines, and the cathode lead-out wires of the four mini LED chips are arranged around the substrate 21, and the corresponding via holes are arranged on the surrounding path of the cathode lead-out wires of the mini LED chips. Among them, the positive poles of each mini LED chip can also point to the transverse axis of the substrate 21, and the actual design can be flexibly adjusted according to the specific available layout space.

[0045] Corresponding to the surrounding structure of the cathode lead-out wires of the mini LED chips, in this embodiment, the lead-out wire of the grounding port of the driving chip 21 is connected to the surrounding path of the cathode lead-out wires of the mini LED chips, and the grounding port and the red LED power supply port of the driving chip are arranged on the same side of the driving chip and lead out to the same side.

[0046] The overall front wiring layout of the LED device in this embodiment is as Figure 3 shown, the wiring layout is uniform, which can effectively ensure the electrical transmission quality and improve the light-emitting driving performance of the LED device.

[0047] The LED device based on the integrated mini LED driver design provided by this utility model places both the driver chip and the LED chip on the front side of the substrate, and the lead-out electrodes on the back side of the substrate. Downstream manufacturers only need to mount the LED device onto the display light board once, which can effectively reduce the production costs of downstream manufacturers. The red LED of the mini LED has a lower operating power than the blue and green LEDs, and the operating power of the blue and green LEDs is similar. Providing a separate power supply for the lower-power red LED can facilitate power consumption control and facilitate heat dissipation design. The three communication electrodes can increase the data transmission volume and facilitate the separate driving of the three colors of the mini LED chip.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An LED device based on a mini LED lamp drive integrated design, characterized in that, The LED device based on mini LED lamp drive integrated design comprises a substrate, a driving chip arranged on the front surface of the substrate, an LED chip, and a lead-out electrode arranged on the back surface of the substrate, and a through hole for electrical connection of the front surface and the back surface is further arranged on the substrate, wherein The LED chip comprises a mini LED chip; The lead-out electrode comprises a red lamp power electrode, a blue-green lamp power electrode, a ground electrode, and three communication electrodes, three anodes of the mini LED chip are respectively connected to the driving chip, and are respectively connected to the red lamp power electrode and the blue-green lamp power electrode through the driving chip and the through hole, the cathode of the mini LED chip and the ground port of the driving chip are further connected to the ground electrode in parallel through the through hole, and the corresponding pin of the driving chip is further connected to the three communication electrodes through the through hole. The red lamp power electrode and the blue-green lamp power electrode are arranged at the positions of both ends of the longitudinal axis of the substrate, the three communication electrodes comprise a first input electrode, a second input electrode, and an output electrode, the first input electrode and the second input electrode are arranged on the first side of the longitudinal axis, and the output electrode and the ground electrode are arranged on the second side of the longitudinal axis.

2. The mini LED lamp driving integrated design based LED device according to claim 1, wherein, The first input electrode and the second input electrode are arranged in a spaced manner along the extension direction of the longitudinal axis, the output electrode and the ground electrode are arranged in a spaced manner along the extension direction of the longitudinal axis, and are symmetrically arranged relative to the longitudinal axis and the transverse axis of the substrate. 3.The mini LED lamp driving integrated design based LED device of claim 2, wherein, The setting position of the ground electrode is closer to the red lamp power electrode than the setting position of the output electrode.

4. The mini LED lamp driving integrated design based LED device according to claim 3, characterized in that, 5. The LED device based on mini LED lamp drive integrated design according to claim 4, wherein The red lamp power port and the blue-green lamp power port of the driving chip are linearly led out to the corresponding through holes arranged in the extension direction of the longitudinal axis, and the extension directions are respectively directed to the red lamp power electrode and the blue-green lamp power electrode; The first input port of the driving chip is linearly led out to the corresponding through hole arranged on the second side of the longitudinal axis, and the extension direction is parallel to the transverse axis of the substrate; The second input port of the driving chip is linearly led out to the corresponding through hole arranged in the leading-out direction of the blue-green lamp power port, and the extension direction deviates from the extension direction of the leading-out line of the blue-green lamp power port; The output port of the driving chip is linearly led out to the corresponding through hole arranged on the first side of the longitudinal axis, and the extension direction is parallel to the transverse axis of the substrate. The leading-out direction of the leading-out line of the blue-green lamp power port and the leading-out direction of the leading-out line of the second input port are respectively arranged on the first side and the second side of the longitudinal axis.

6. The mini LED lamp driving integrated design based LED device according to claim 5, characterized in that, The mini LED chip comprises four, the driving chip is arranged at the center position of the substrate, and the four mini LED chips are arranged at the four corner positions of the substrate.

7. The mini LED lamp driving integrated design based LED device according to any one of claims 1 to 6, characterized in that, ​ 8. The mini LED lamp driving integrated design based LED device according to claim 7, characterized in that, The positive electrode of each of the mini LED chips points to the longitudinal axis or the transverse axis of the substrate, and the negative electrode points outward to the side line. The cathode lead lines of the four mini LED chips are arranged in a ring around the substrate, and the corresponding through holes are arranged on the ringed path of the cathode lead lines of the mini LED chips.

9. The mini LED lamp driving integrated design based LED device according to claim 8, wherein, The ground port lead line of the driving chip is connected to the ringed path of the cathode lead lines of the mini LED chips. The ground port and the red light power port of the driving chip are arranged on the same side of the driving chip and are led out to the same side.

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