LED chip and LED lamp strip

Abstract

The utility model provides an LED chip and an LED lamp strip. The LED chip comprises a first base island, a second base island, a third base island, a fourth base island, a driving control chip, a first lamp bead, a second lamp bead and a third lamp bead, the first lamp bead and the second lamp bead are arranged on the second base island, the third lamp bead is arranged on the third base island, and the driving control chip is arranged on the fourth base island; the data input end of the driving control chip is connected with the first base island, the data output end is connected with the fourth base island, the power supply end is connected with the second base island, the grounding end is connected with the third base island, and the first, second and third driving ends are respectively connected with the cathodes of the first, second and third lamp beads; the anodes of the first, second and third lamp beads are connected with the third base island; a data input pin is led out from the first base island, a power pin is led out from the second base island, a common ground pin is led out from the third base island, and a data output pin is led out from the fourth base island. According to the LED chip and the LED lamp strip, series connection and / or parallel connection of the lamp strips can be achieved, the flexibility is higher, and the application range is wider.

Description

Technical Field

[0001] This utility model relates to the field of LED driver control, and in particular to an LED chip and an LED light strip. Background Technology

[0002] LED (Light Emitting Diode) is a semiconductor light source that converts electrical energy into light energy. Since its emergence in the early 1960s, LED technology has developed into a highly efficient, energy-saving, and long-life lighting technology, widely used in various fields. Typically, LEDs are used in the form of LED strips for decorative lighting, landscape lighting, and indoor lighting, emitting various colors of light, including white light, warm white light, cool white light, and colored light.

[0003] like Figure 1 As shown, currently, most LED strips are connected in parallel, which results in poor flexibility. Improving the flexibility of the connection method for LED strips to meet various needs has become one of the urgent problems to be solved by those skilled in the art.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an LED chip and an LED light strip to solve the problems of the single connection method and limited application of the light strips in the prior art.

[0006] To achieve the above and other related objectives, this utility model provides an LED chip, which includes at least:

[0007] First base island, second base island, third base island, fourth base island, drive control chip, first LED bead, second LED bead and third LED bead;

[0008] The first and second LEDs are disposed on the second base island, the third LED is disposed on the third base island, and the drive control chip is disposed on the fourth base island;

[0009] The data input terminal of the drive control chip is electrically connected to the first base island, the data output terminal is electrically connected to the fourth base island, the power supply terminal is electrically connected to the second base island, the ground terminal is electrically connected to the third base island, the first drive terminal is electrically connected to the negative electrode of the first LED, the second drive terminal is electrically connected to the negative electrode of the second LED, and the third drive terminal is electrically connected to the negative electrode of the third LED; the positive electrodes of the first LED, the second LED, and the third LED are electrically connected to the third base island.

[0010] The first base island has a data input pin, the second base island has a power supply pin, the third base island has a common ground pin, and the fourth base island has a data output pin.

[0011] Optionally, the first LED, the second LED, and the third LED are respectively a red LED, a green LED, and a blue LED.

[0012] Alternatively, the bottom electrode of the first LED bead is electrically connected to the second base island via conductive adhesive, and the top electrode is electrically connected to the first driving terminal of the driving control chip via a lead; wherein the bottom electrode is the positive electrode and the top electrode is the negative electrode.

[0013] Alternatively, the positive and negative terminals of the second LED are both located on the top surface and are electrically connected via leads. The bottom surface of the second LED is fixed to the second base island with non-conductive adhesive.

[0014] Alternatively, the positive and negative electrodes of the third LED are both located on the top surface and are electrically connected via leads, while the bottom surface of the third LED is fixed to the third base island with non-conductive adhesive.

[0015] Optionally, the first base island, the second base island, the third base island, and the fourth base island are arranged sequentially along a set direction, and the data input terminal, power supply terminal, first driving terminal, second driving terminal, third driving terminal, data output terminal, and ground terminal of the drive control chip are arranged sequentially along the set direction; wherein, the set direction is clockwise or counterclockwise.

[0016] Optionally, the data input pin and the data output pin are located on the first side of the LED chip, and the power supply pin and the common ground pin are located on the second side of the LED chip, with the first side and the second side being opposite to each other.

[0017] To achieve the above and other related objectives, this utility model also provides an LED light strip, which includes at least:

[0018] The system consists of a controller, a power module, and N LED strips, where N is a natural number greater than or equal to 1.

[0019] The controller provides control signals to the light strip;

[0020] The power module provides power to the light strip;

[0021] Each light strip includes M LED chips as described above, where M is a natural number greater than or equal to 2; wherein, the data input terminal of the subsequent LED chip is connected to the data output terminal of the preceding LED chip, the power supply terminal of the subsequent LED chip is connected to the ground terminal of the preceding LED chip, the power supply terminal of the first-stage LED chip is connected to the power module, and the ground terminal of the last-stage LED chip is grounded.

[0022] When N is greater than or equal to 2, the light strips are cascaded in sequence, and the controller provides control signals to each light strip in sequence through the first light strip.

[0023] Optionally, the light strip further includes a capacitor, a first diode, and a first resistor; the first end of the capacitor receives a control signal provided by the previous stage, and the second end is connected to the data input terminal of the first-stage LED chip; the cathode of the first diode is connected to the data input terminal of the first-stage LED chip, and the anode is connected to the power supply terminal of the first-stage LED chip; one end of the first resistor is connected to the data input terminal of the first-stage LED chip, and the other end is connected to the ground terminal of the first-stage LED chip.

[0024] Optionally, the light strip further includes a second diode; the cathode of the second diode is connected to the power supply terminal of the first-stage LED chip, and the anode is connected to the power supply module.

[0025] As described above, the LED chip and LED light strip of this utility model have the following beneficial effects:

[0026] The LED chip and LED strip of this invention, through unique structural arrangement and peripheral circuit design, can realize the series and / or parallel connection of each light strip, which is more flexible and has a wider range of applications. Attached Figure Description

[0027] Figure 1 The diagram shows a parallel structure of LED light strips in the prior art.

[0028] Figure 2 The diagram shown is a schematic of one packaging structure of the LED chip of this utility model.

[0029] Figure 3 The diagram shows the pinout of the drive control chip of this utility model.

[0030] Figure 4 The diagram shown is a schematic diagram of another packaging structure of the LED chip of this utility model.

[0031] Figure 5The diagram shown is a structural schematic of the LED light strip of this utility model.

[0032] Component designation explanation

[0033] 1 LED chip

[0034] 111 First Base Island

[0035] 112 Second Base Island

[0036] 113 Third Base Island

[0037] 114 Fourth Base Island

[0038] 12 drive control chips

[0039] 131 First LED Bead

[0040] 132 Second LED Bead

[0041] 133 Third LED Bead

[0042] 2 LED strips

[0043] 3 Controllers

[0044] 4 Power Module Detailed Implementation

[0045] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0046] Please see Figures 2-5 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0047] like Figure 2 As shown, this utility model provides an LED chip 1, which includes:

[0048] First base island 111, second base island 112, third base island 113, fourth base island 114, drive control chip 12, first LED bead 131, second LED bead 132 and third LED bead 133.

[0049] like Figure 2As shown, the first LED 131 and the second LED 132 are disposed on the second base island 112, the third LED 133 is disposed on the third base island 113, and the drive control chip 12 is disposed on the fourth base island 114. The data input terminal of the drive control chip 12 is electrically connected to the first base island 111, the data output terminal is electrically connected to the fourth base island 114, the power supply terminal is electrically connected to the second base island 112, the ground terminal is electrically connected to the third base island 113, the first drive terminal is electrically connected to the negative terminal of the first LED 131, the second drive terminal is electrically connected to the negative terminal of the second LED 132, and the third drive terminal is electrically connected to the negative terminal of the third LED 133; the positive terminals of the first LED 131, the second LED 132, and the third LED 133 are electrically connected to the third base island 113. The first base island 111 has a data input pin DI, the second base island 112 has a power supply pin VDD, the third base island 113 has a common ground pin GND, and the fourth base island 114 has a data output pin DO.

[0050] Specifically, in this embodiment, the first LED 131, the second LED 132, and the third LED 133 are respectively a red LED (R), a green LED (G), and a blue LED (B), i.e., set to red, green, and blue colors respectively. As an example, the first LED 131 is red, the second LED 132 is green, and the third LED 133 is blue; in actual use, the first LED 131 can also be configured as blue or green, and similarly, the colors of other LEDs can be adjusted accordingly, not limited to this embodiment.

[0051] In this embodiment, the positive and negative electrodes of the first LED bead 131 are respectively disposed at the top and bottom, with the bottom electrode being the positive electrode and the top electrode being the negative electrode. The bottom electrode (positive electrode) of the first LED bead 131 is electrically connected to the second base island 112 via conductive adhesive, and the top electrode is electrically connected to the first driving terminal of the drive control chip 12 via a lead. The positive and negative electrodes of the second LED bead 132 are both disposed at the top, with the negative electrode electrically connected to the second driving terminal of the drive control chip 12 via a lead, and the positive electrode electrically connected to the second base island 112 via a lead; the bottom surface of the second LED bead 132 is fixed to the second base island 112 with non-conductive adhesive. In actual use, the positive and negative electrodes of the first LED bead 131 can also be disposed at the top; the positive electrode of the second LED bead 132 can be disposed at the bottom, and the negative electrode at the top; the configuration can be adjusted according to actual needs and is not limited to this embodiment.

[0052] In this embodiment, the positive and negative terminals of the third LED bead 133 are both located on the top. The negative terminal is electrically connected to the third driving terminal of the driving control chip 12 via a lead wire, and the positive terminal is electrically connected to the second base island 112 via a lead wire. The bottom surface of the third LED bead 133 is fixed to the third base island 113 with non-conductive adhesive.

[0053] Specifically, such as Figure 3As shown, the drive control chip 12 provides drive control signals for each LED bead, including a data input terminal DI, a power supply terminal VDD, a first drive terminal R, a second drive terminal G, a third drive terminal B, a data output terminal DO, and a ground terminal GND. The data input terminal DI receives data provided externally. After the current LED chip 1 has received a set number of bits of data, it forwards the subsequently received data from the data output terminal DO. The power supply terminal VDD and the ground terminal GND are connected to the power supply and ground, respectively. Each drive terminal provides a drive signal for the corresponding LED bead.

[0054] like Figure 2 As shown, in this embodiment, the first base island 111, the second base island 112, the third base island 113, and the fourth base island 114 are arranged in a counter-clockwise direction. Therefore, the data input terminal DI, power supply terminal VDD, first drive terminal R, second drive terminal G, third drive terminal B, data output terminal DO, and ground terminal GND of the drive control chip 12 are also arranged in the same counter-clockwise direction to facilitate wire bonding, avoid cross-setting of leads during wire bonding, and reduce packaging difficulty. They can also be arranged in a clockwise direction to achieve the same effect, which will not be elaborated here. More specifically, the lead of the data output terminal DO can be placed between the third drive terminal B and the ground terminal GND (e.g., ...). Figure 2 As shown), it can also be positioned across the drive control chip 12 between the data input terminal DI and the ground terminal GND (as shown). Figure 4 (As shown).

[0055] like Figure 2 and Figure 4 As shown, all components of LED chip 1, except for the pins, are housed within the package housing. In this embodiment, the data input pin DI and the data output pin DO are located on the first side of LED chip 1, and the power supply pin VDD and the common ground pin GND are located on the second side of LED chip 1, with the first and second sides facing each other for subsequent wiring. In actual use, the pins can be arranged in other ways, not limited to this embodiment.

[0056] like Figure 5 As shown, this utility model also provides an LED light strip, which includes:

[0057] The system consists of a controller 3, a power supply module 4, and N light strips 2, where N is a natural number greater than or equal to 1.

[0058] like Figure 5 As shown, controller 3 provides control signals to light strip 2.

[0059] Specifically, in this embodiment, the controller 3 is implemented using an MCU; any module that can provide control signals for the LED driver can be used as the controller 3, and is not limited to this embodiment.

[0060] More specifically, in this embodiment, the output terminal of the controller 3 is connected in series with a second resistor R2, and the ground terminal is connected in series with a third resistor R3.

[0061] like Figure 5 As shown, power module 4 provides power to light strip 2.

[0062] Specifically, in this embodiment, the power supply module 4 is an AC to DC module; in actual use, it can be configured as a DC to DC module, and any method that can provide DC power to the light strip 2 is applicable.

[0063] like Figure 5 As shown, each light strip includes M cascaded LED chips 1, where M is a natural number greater than or equal to 2; wherein, the data input terminal DI of the subsequent LED chip 1 is connected to the data output terminal DO of the preceding LED chip 1, the power supply terminal VDD of the subsequent LED chip 1 is connected to the ground terminal GND of the preceding LED chip 1, the power supply terminal VDD of the first LED chip 1 is connected to the power module 4, and the ground terminal GND of the last LED chip 1 is grounded.

[0064] Specifically, each LED chip 1 is connected in series to form a light strip. As another implementation of this invention, the light strip 2 also includes a capacitor C, a first diode D1, and a first resistor R1. The first end of the capacitor C receives the control signal provided by the preceding stage (for the first-stage light strip, the control signal is directly provided by the controller 3; for the second and subsequent light strips, the control signal is provided by the data output terminal DO of the last LED chip 1 of the preceding stage light strip), and the second end is connected to the data input terminal DI of the first-stage LED chip 1. The cathode of the first diode D1 is connected to the data input terminal DI of the first-stage LED chip 1, and the anode is connected to the power supply terminal VDD of the first-stage LED chip 1. One end of the first resistor R1 is connected to the data input terminal DI of the first-stage LED chip 1, and the other end is connected to the ground terminal GND of the first-stage LED chip 1. The capacitor C serves as a coupling capacitor; the first diode D1 serves as a data bias diode and can be implemented using a low-current, fast-recovery diode. As another implementation of this utility model, the light strip 2 also includes a second diode D2; the cathode of the second diode D2 is connected to the power supply terminal VDD of the first-stage LED chip 1, and the anode is connected to the power supply module 4. The second diode D2 serves as a reverse connection protection diode and can be implemented using a low-power diode.

[0065] like Figure 5As shown, when N is greater than or equal to 2, each LED strip 2 is cascaded sequentially. At this time, the controller 3 provides control signals to each LED strip sequentially through the first LED strip 2. Specifically, the control signal provided by the controller 3 enters the first LED strip and is received by the first-level LED chip 1. After receiving the signal, the first-level LED chip 1 forwards the remaining data to the second-level LED chip 1, and so on, until all LED chips 1 in the first LED strip 2 have received the data. After receiving the data, the remaining data is forwarded from the last-level LED chip to the second LED strip 2, and so on. This process will not be elaborated here.

[0066] The LED chip and light strip of this utility model can be connected in series through a unique structural arrangement and peripheral circuit design; of course, the light strip 2 composed of the LED chip 1 of this utility model can also be connected in parallel, which will not be elaborated here.

[0067] In summary, this utility model provides an LED chip and an LED light strip, comprising: a first base island, a second base island, a third base island, a fourth base island, a driver control chip, a first LED bead, a second LED bead, and a third LED bead; the first and second LED beads are disposed on the second base island, the third LED bead is disposed on the third base island, and the driver control chip is disposed on the fourth base island; the data input terminal of the driver control chip is electrically connected to the first base island, the data output terminal is electrically connected to the fourth base island, the power supply terminal is electrically connected to the second base island, the ground terminal is electrically connected to the third base island, the first driving terminal is electrically connected to the negative terminal of the first LED bead, the second driving terminal is electrically connected to the negative terminal of the second LED bead, and the third driving terminal is electrically connected to the negative terminal of the third LED bead; the positive terminals of the first, second, and third LED beads are electrically connected to the third base island; the first base island has a data input pin, the second base island has a power supply pin, the third base island has a common ground pin, and the fourth base island has a data output pin. The LED chip and LED strip of this invention can realize the series and / or parallel connection of various light strips, which is more flexible and has a wider range of applications. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An LED chip, characterized in that, The LED chip includes at least: First base island, second base island, third base island, fourth base island, drive control chip, first LED bead, second LED bead and third LED bead; The first and second LEDs are disposed on the second base island, the third LED is disposed on the third base island, and the drive control chip is disposed on the fourth base island; The data input terminal of the drive control chip is electrically connected to the first base island, the data output terminal is electrically connected to the fourth base island, the power supply terminal is electrically connected to the second base island, the ground terminal is electrically connected to the third base island, the first drive terminal is electrically connected to the negative electrode of the first LED, the second drive terminal is electrically connected to the negative electrode of the second LED, and the third drive terminal is electrically connected to the negative electrode of the third LED; the positive electrodes of the first LED, the second LED, and the third LED are electrically connected to the third base island. The first base island has a data input pin, the second base island has a power supply pin, the third base island has a common ground pin, and the fourth base island has a data output pin.

2. The LED chip according to claim 1, characterized in that: The first LED, the second LED, and the third LED are respectively a red LED, a green LED, and a blue LED.

3. The LED chip according to claim 1 or 2, characterized in that: The bottom electrode of the first LED bead is electrically connected to the second base island via conductive adhesive, and the top electrode is electrically connected to the first driving terminal of the driving control chip via a lead wire; wherein, the bottom electrode is the positive electrode and the top electrode is the negative electrode.

4. The LED chip according to claim 1 or 2, characterized in that: The positive and negative terminals of the second LED are both located on the top surface and are electrically connected by leads. The bottom surface of the second LED is fixed to the second base island by non-conductive adhesive.

5. The LED chip according to claim 1 or 2, characterized in that: The positive and negative electrodes of the third LED are both located on the top surface and are electrically connected by leads. The bottom surface of the third LED is fixed to the third base island by non-conductive adhesive.

6. The LED chip according to claim 1, characterized in that: The first base island, the second base island, the third base island, and the fourth base island are arranged sequentially along a set direction, and the data input terminal, power supply terminal, first driving terminal, second driving terminal, third driving terminal, data output terminal, and ground terminal of the drive control chip are arranged sequentially along the set direction. The set direction is either clockwise or counterclockwise.

7. The LED chip according to claim 1, characterized in that: The data input pin and the data output pin are located on the first side of the LED chip, and the power supply pin and the common ground pin are located on the second side of the LED chip. The first side and the second side are arranged opposite to each other.

8. An LED light strip, characterized in that, The LED light strip includes at least: The system consists of a controller, a power module, and N LED strips, where N is a natural number greater than or equal to 1. The controller provides control signals to the light strip; The power module provides power to the light strip; Each light strip includes M cascaded LED chips as described in any one of claims 1-7, where M is a natural number greater than or equal to 2; wherein, the data input terminal of the subsequent LED chip is connected to the data output terminal of the preceding LED chip, the power supply terminal of the subsequent LED chip is connected to the ground terminal of the preceding LED chip, the power supply terminal of the first-stage LED chip is connected to the power module, and the ground terminal of the last-stage LED chip is grounded. When N is greater than or equal to 2, the light strips are cascaded in sequence, and the controller provides control signals to each light strip in sequence through the first light strip.

9. The LED light strip according to claim 8, characterized in that: The light strip also includes a capacitor, a first diode, and a first resistor; the first end of the capacitor receives the control signal provided by the previous stage, and the second end is connected to the data input terminal of the first-stage LED chip; the cathode of the first diode is connected to the data input terminal of the first-stage LED chip, and the anode is connected to the power supply terminal of the first-stage LED chip; one end of the first resistor is connected to the data input terminal of the first-stage LED chip, and the other end is connected to the ground terminal of the first-stage LED chip.

10. The LED light strip according to claim 8 or 9, characterized in that: The light strip also includes a second diode; the cathode of the second diode is connected to the power supply terminal of the first-stage LED chip, and the anode is connected to the power supply module.

Images