A low voltage variable light downlight source

Abstract

The utility model discloses a low-voltage variable light tube light source, including a light source board, on which a plurality of constant current light source chips, a plurality of variable light source chipsets, a rectifier bridge, a driver chip and a low-voltage power input pad are arranged; the low-voltage power input pad is electrically connected to the input end of the rectifier bridge; after the plurality of constant current light source chips are connected in parallel, the positive pole is electrically connected to the output end of the rectifier bridge, and after the plurality of constant current light source chips are connected in parallel, the negative pole is electrically connected to the positive pole of the variable light source chipset; the negative pole of the constant current light source chip and the negative pole of the variable light source chipset are respectively connected to different pins of the driver chip. The utility model has a reasonable structure, which is connected to an external low-voltage power supply through a low-voltage power input pad, and can realize constant current lighting and variable light lighting through the variable light source chipset and the constant current light source chip, which is beneficial to improving lighting efficiency, improving safety in use, reducing processing costs, and increasing service life, and has strong applicability and good practicality.

Description

Technical Field

[0001] The utility model belongs to the technical field of downlights, and in particular relates to a low-voltage variable-light downlight light source. Background Art

[0002] Downlight is a common decorative and lighting structure, which is generally composed of a downlight shell, a light source board and a lens panel. The light source board of the downlight in the prior art mostly adopts a high-voltage driving power supply. Although it can meet the general usage requirements, it cannot achieve the effect of low-voltage dimming, which will affect the safety of use to a certain extent, and will also increase the cost of use. In addition, the luminous efficiency is low, so the applicability and practicality are limited. Utility Model Content

[0003] The utility model aims to provide a low-voltage variable-light downlight light source with reasonable structure and high light efficiency.

[0004] The technical solution to achieve the purpose of the utility model is a low-voltage variable light downlight light source, including a light source board, on which a plurality of constant current light source chips, a plurality of variable light source chip groups, a rectifier bridge, a driver chip and a low-voltage power input pad are arranged;

[0005] The low voltage power input pad is electrically connected to the input end of the rectifier bridge;

[0006] After a number of the constant current light source chips are connected in parallel, the positive poles are electrically connected to the output end of the rectifier bridge, and after a number of the constant current light source chips are connected in parallel, the negative poles are electrically connected to the positive pole of the variable light source chipset;

[0007] The cathode of the constant current light source chip and the cathode of the variable light source chipset are respectively connected to different pins of the driving chip.

[0008] Further preferably, the dimming light source chipset comprises a plurality of dimming light source chip monomers connected in parallel.

[0009] Further preferably, a plurality of installation positioning slots are provided on the edge of the light source board.

[0010] More preferably, the light source plate is circular.

[0011] Further preferably, a resistor and a capacitor are welded on the light source board.

[0012] It is further preferred that: the number of the constant current light source chips is five;

[0013] The dimming light source chipset is arranged in the middle of the light source board, and the constant current light source chip is arranged around the dimming light source chipset of the light source board.

[0014] The utility model has positive effects: the structure of the utility model is reasonably set up, it is connected to the external low-voltage power supply through the low-voltage power supply input pad, and through the variable light source chipset with the constant current light source chip, not only constant current lighting can be achieved, but also variable light lighting can be achieved, which is beneficial to improving the lighting effect, and it can improve the safety of use, reduce processing costs, and increase service life, and it has strong applicability and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the circuit board structure of the utility model;

[0017] Figure 2 It is a schematic diagram of a specific circuit structure of the utility model.

[0018] Figure numerals: light source board 1, constant current light source chip 2, variable light source chipset 3, rectifier bridge 4, driver chip 5, low voltage power input pad 6, installation positioning slot 7. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] See Figure 1 to Figure 2 As shown, a low-voltage variable-brightness downlight light source comprises a light source board 1, on which a plurality of constant-current light source chips 2 are arranged. Figure 1 and Figure 2 U1-U5, several dimming light source chipsets 3, rectifier bridge 4, driver chip 5 and low voltage power input pad 6; in this embodiment, the dimming light source chipset includes several dimming light source chip monomers connected in parallel. Its light source board is a conventional PCB board, and its rectifier bridge and driver chip are also conventional models of the prior art, which are simply applied. At the same time, its constant current light source chip and dimming light source chip monomer are also conventional applications of the prior art, so they are not recorded in detail.

[0022] During welding, the low-voltage power input pad is electrically connected to the input end of the rectifier bridge; after several constant current light source chips are connected in parallel, the positive pole is electrically connected to the output end of the rectifier bridge, and after parallel connection, the negative pole is electrically connected to the positive pole of the dimming light source chipset; the negative pole of the constant current light source chip and the negative pole of the dimming light source chipset are respectively connected to different pins of the driver chip. Through the low-voltage power input pad, it can connect to an external low-voltage power supply, thereby improving the safety of use, and can also realize constant current lighting and dimming lighting, meeting the lighting needs of different situations, and has strong practicality.

[0023] Meanwhile, in the actual application process, in order to improve the convenience and stability of installation, the edge of the light source board is provided with a plurality of installation positioning slots 7. The light source board is circular in shape. A resistor R and a capacitor C are also welded on the light source board.

[0024] In actual application, the number of the constant current light source chips is five, specifically U1-U5; the variable light source chipset is arranged in the middle of the light source board, and the constant current light source chips are arranged around the variable light source chipset of the light source board. Figure 1 As shown, the constant current light source chip can meet the constant current lighting demand, and the variable light source chip is set in the middle to achieve central variable light lighting.

[0025] The utility model has positive effects: the structure of the utility model is reasonably set up, it is connected to the external low-voltage power supply through the low-voltage power supply input pad, and through the variable light source chipset with the constant current light source chip, not only constant current lighting can be achieved, but also variable light lighting can be achieved, which is beneficial to improving the lighting effect, and it can improve the safety of use, reduce processing costs, and increase service life, and it has strong applicability and good practicality.

[0026] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification can also be directly processed according to existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0027] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. A low-voltage variable-light downlight light source, comprising a light source board, characterized in that: The light source board is provided with a plurality of constant current light source chips, a plurality of variable light source chip groups, a rectifier bridge, a driver chip and a low-voltage power input pad; The low voltage power input pad is electrically connected to the input end of the rectifier bridge; After a number of the constant current light source chips are connected in parallel, the positive poles are electrically connected to the output end of the rectifier bridge, and after a number of the constant current light source chips are connected in parallel, the negative poles are electrically connected to the positive pole of the variable light source chipset; The cathode of the constant current light source chip and the cathode of the variable light source chipset are respectively connected to different pins of the driver chip; The variable light source chipset includes a plurality of variable light source chip monomers connected in parallel.

2. A low-voltage variable-light downlight light source according to claim 1, characterized in that: The edge of the light source plate is provided with a plurality of installation positioning slots.

3. The low-voltage variable-light downlight source according to claim 1, characterized in that: The light source plate is arranged in a circular shape.

4. The low-voltage variable-light downlight light source according to claim 1, characterized in that: A resistor and a capacitor are also welded on the light source board.

5. The low-voltage variable-light downlight light source according to claim 1, characterized in that: The number of the constant current light source chips is five; The dimming light source chipset is arranged in the middle of the light source board, and the constant current light source chip is arranged around the dimming light source chipset of the light source board.

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