A current balancing device suitable for LED loads

Abstract

The present invention provides a current balancing device suitable for LED loads, comprising: an LED chip, a bracket, a dam, and a barrier layer; the bracket is provided with a positive electrode and a negative electrode that are not connected to each other; the LED chip is fixed on the bracket and connected to the positive electrode and the negative electrode; the dam is provided on the bracket and surrounds the periphery of the LED chip; the barrier layer is filled in the dam to cover the LED chip. The present invention utilizes LED chips and cooperates with barrier layers so that the current balancing device can achieve the same volt-ampere characteristics as LEDs but does not emit light. At the same time, a bracket that is convenient for connection to a circuit is also provided. Through the current balancing device of the present invention, not only is the current balancing effect better, but its component cost is lower, the component occupies less space, and the usable space is more flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of current balancing devices, and in particular to a current balancing device suitable for LED loads. Background Art

[0002] During the design of lamps, when LED strings are connected in parallel, their number is usually not divisible by an integer, and a load device is required to balance the voltage drop of the branch. In the prior art, the following methods are usually used to achieve this: 1. Figure 1 As shown in the dotted box, "diodes in series with resistors" are used in parallel. This method uses the characteristics of diodes to simulate the volt-ampere characteristic curve of LEDs as much as possible. The cost of components required for this solution is high, and the components occupy a large space, so the space requirement is high. 2. As shown in the dotted box 2 in the figure, "resistors" are used in parallel. Since the volt-ampere characteristic curve of pure resistors is linear, this method cannot fit the characteristic curve of LEDs, so its current sharing effect is poor and is only suitable for cases where the current sharing requirement is not high. As shown in the next circuit diagram, LED1 / / LED4 / / LED6, LED2 / / LED5 / / LED7 ( / / indicates parallel connection), the branch current flowing through each LED is equal to 1 / 3 of the total current, but LED3 is connected in parallel with the "current sharing load module". In order to make the branch current flowing through LED3 equal to 1 / 3 of the total current, the volt-ampere characteristic curve of the "current sharing load module" must be consistent with that of LED3, otherwise the branch current is unbalanced, and more components flow through the branch with small voltage drop, resulting in uneven current in each parallel loop. Summary of the invention

[0003] In order to overcome the above technical defects, the present invention provides a current sharing device suitable for LED loads, which can achieve the same volt-ampere characteristics as LEDs but does not emit light.

[0004] In order to solve the above problems, the present invention is implemented according to the following technical solutions:

[0005] A current balancing device suitable for LED loads, characterized in that it comprises: an LED chip, a bracket, a dam, and a barrier layer;

[0006] The support is provided with a positive electrode and a negative electrode which are not connected to each other;

[0007] The LED chip is fixed on the bracket and connected to the positive electrode and the negative electrode;

[0008] The dam is arranged on the bracket and surrounds the periphery of the LED chip;

[0009] The barrier layer is filled in the dam to cover the LED chip.

[0010] As a further improvement of the present invention, it also includes an insulating part arranged on the other side of the bracket, and the insulating part is provided with an insulating fence arranged through the bracket to divide the bracket into the positive electrode and the negative electrode which are not connected to each other.

[0011] As a further improvement of the present invention, the LED chip is a non-luminous LED chip.

[0012] As a further improvement of the present invention, the defect density of the LED chip epitaxy is greater than or equal to 50%.

[0013] As a further improvement of the present invention, the barrier layer is packaging glue.

[0014] As a further improvement of the present invention, the LED chip is one of a UV chip, a blue-green light chip, a red-yellow light chip, and an IR chip.

[0015] As a further improvement of the present invention, the barrier layer is a light shielding layer.

[0016] As a further improvement of the present invention, the light shielding layer includes: a light absorbing material and a light blocking material.

[0017] As a further improvement of the present invention, the light shielding layer includes: black powder and transparent glue.

[0018] As a further improvement of the present invention, the light shielding layer includes: non-light-transmitting plastic, glass, or metal.

[0019] Compared with the prior art, the beneficial effects provided by the present invention are as follows: by utilizing LED chips in combination with a barrier layer, the current balancing device can achieve the same volt-ampere characteristics as the LED but does not emit light, and is also provided with a bracket that is convenient for connecting to the circuit. Through the current balancing device of the present invention, not only is the current balancing effect better, but the component cost is lower, the component occupies less space, and the available space is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the prior art (using "diode series resistor" in parallel);

[0021] Figure 2 It is a structural schematic diagram of the prior art (using "resistors" in parallel);

[0022] Figure 3 This is a schematic diagram of the structure of the current balancing device of the present invention in use;

[0023] Figure 4 This is a schematic diagram of the structure of the current balancing device described in Example 1;

[0024] Figure 5Another schematic diagram of the structure of the current balancing device described in Example 1;

[0025] Figure 6 This is a schematic diagram of the structure of the current balancing device described in Example 2;

[0026] Figure 7 Another structural schematic diagram of the current balancing device described in Example 1.

[0027] Description of reference numerals:

[0028] 1. Current balancing device.

[0029] Embodiment 1: 101, LED chip; 102, bracket; 1021, positive electrode; 1022, negative electrode; 103, dam; 104, barrier layer; 105, lead; 106, insulating part; 1061, insulating fence.

[0030] Embodiment 2: 201, LED chip; 2011, positive electrode; 2012, negative electrode; 202, bracket; 203, dam; 204, barrier layer; 205, lead; 206, insulating part; 2061, insulating fence. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Example 1

[0033] This embodiment provides a current balancing device suitable for LED loads, such as Figure 3-Figure 5 As shown, it includes: an LED chip, a bracket, a dam, and a barrier layer; the bracket is provided with a positive electrode and a negative electrode that are not connected to each other; the LED chip is fixed on the bracket and connected to the positive electrode and the negative electrode; the dam is provided on the bracket and surrounds the periphery of the LED chip; the barrier layer is filled in the dam to cover the LED chip.

[0034] This embodiment includes an insulating part arranged on the other side of the bracket, and the insulating part is provided with an insulating fence that penetrates the bracket, dividing the bracket into a positive electrode and a negative electrode that are not connected to each other. Specifically, the bracket is a metal bracket, and one side of the bracket is provided with an LED chip, a dam, and a barrier layer, and the other side is provided with an insulating part. For ease of use, the bracket is bent toward the insulating part to form a positive electrode and a negative electrode, and the positive electrode and the negative electrode are isolated by the insulating part. At the same time, the insulating part can also play a supporting role for the bracket.

[0035] In order to meet the requirement of partial luminescence, the LED chip of this embodiment is a non-luminous LED chip, and the barrier layer is a packaging glue.

[0036] The defect density of the LED chip epitaxy is greater than or equal to 50%. During the power-on process, no light is generated after the electrons and holes recombine, only heat is generated; therefore, the volt-ampere characteristic curve of the current-sharing device in this embodiment has the same volt-ampere characteristic curve as that of the LED.

[0037] Example 2

[0038] This embodiment provides another current balancing device suitable for LED loads, such as Figure 3 and Figure 6 , Figure 7 As shown, it includes: an LED chip, a bracket, a dam, and a barrier layer; the bracket is provided with a positive electrode and a negative electrode that are not connected to each other; the LED chip is fixed on the bracket and connected to the positive electrode and the negative electrode; the dam is provided on the bracket and surrounds the periphery of the LED chip; the barrier layer is filled in the dam to cover the LED chip.

[0039] This embodiment includes an insulating part arranged on the other side of the bracket, and the insulating part is provided with an insulating fence that penetrates the bracket, dividing the bracket into a positive electrode and a negative electrode that are not connected to each other. Specifically, the bracket is a metal bracket, and one side of the bracket is provided with an LED chip, a dam, and a barrier layer, and the other side is provided with an insulating part. For ease of use, the bracket is bent toward the insulating part to form a positive electrode and a negative electrode, and the positive electrode and the negative electrode are isolated by the insulating part. At the same time, the insulating part can also play a supporting role for the bracket.

[0040] In order to meet the requirement of partial luminescence, the LED chip is one of a UV chip, a blue-green light chip, a red-yellow light chip, and an IR chip. Meanwhile, the barrier layer is a light shielding layer.

[0041] Preferably, the light shielding layer comprises: a light absorbing material and a light blocking material.

[0042] Preferably, the light shielding layer comprises: black powder and transparent glue.

[0043] The current balancing device of this embodiment does not generate luminous flux during use; the volt-ampere characteristic curve of the current balancing device has the same volt-ampere characteristic as that of the LED.

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A current balancing device suitable for LED loads, characterized in that: include: LED chips, brackets, dams, and barrier layers; The support is provided with a positive electrode and a negative electrode which are not connected to each other; The LED chip is fixed on one surface of the bracket and connected to the positive electrode and the negative electrode; The dam is arranged on the bracket and surrounds the periphery of the LED chip; The barrier layer is filled in the dam to cover the LED chip.

2. The current balancing device according to claim 1, characterized in that: It also includes an insulating part arranged on the other side of the bracket, and the insulating part is provided with an insulating fence arranged through the bracket to divide the bracket into the positive electrode and the negative electrode which are not connected to each other.

3. The current balancing device suitable for LED load according to claim 1, characterized in that: The LED chip is a non-luminous LED chip.

4. The current balancing device suitable for LED load according to claim 3, characterized in that: The defect density of the LED chip epitaxy is greater than or equal to 50%.

5. The current balancing device suitable for LED load according to claim 3, characterized in that: The barrier layer is packaging glue.

6. The current balancing device suitable for LED load according to claim 1, characterized in that: The LED chip is one of a UV chip, a blue-green light chip, a red-yellow light chip, and an IR chip.

7. The current balancing device suitable for LED load according to claim 6, characterized in that: The barrier layer is a light shielding layer.

8. The current balancing device suitable for LED load according to claim 7, characterized in that: The light shielding layer includes a light absorbing material and a light blocking material.

9. The current balancing device suitable for LED load according to claim 7, characterized in that: The light shielding layer includes black powder and transparent glue.

10. The current balancing device suitable for LED load according to claim 7, characterized in that: The light shielding layer includes: non-light-transmitting plastic, glass, and metal.

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