Constant-voltage type double-color inverted COB light source

Abstract

The utility model relates to the technical field of COB light sources, and particularly discloses a constant-voltage type double-color flip COB light source, which comprises a COB substrate, and the COB substrate is provided with a plurality of power supply bonding pads, a plurality of sequentially connected warm light chip bonding pad groups, a plurality of sequentially connected cold light chip bonding pad groups and a plurality of constant-voltage IC bonding pads. The power supply bonding pad, the warm light chip bonding pad group and the cold light chip bonding pad group are all connected with the constant-voltage IC bonding pad, a constant-voltage IC chip is welded on the constant-voltage IC bonding pad, and a warm light chip and a cold light chip are respectively welded on the warm light chip bonding pad group and the cold light chip bonding pad group. According to the utility model, the constant-voltage IC chip is welded on the constant-voltage IC bonding pad to stably adjust the accessed power supply voltage, so that the internal chip is protected from being influenced by high-voltage surge, and the constant-voltage function is realized; in addition, the current of the warm light chip and the cold light chip can be kept constant, the phenomenon of overcurrent or non-lighting is avoided, and the light-emitting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of COB light sources, in particular to a constant-voltage two-color inverted COB light source. Background Art

[0002] COB (Chip on Board), chip on board packaging, is one of the bare chip mounting technologies. The semiconductor chip is mounted on the printed circuit board. The electrical connection between the chip and the substrate is achieved by wire stitching and covered with resin to ensure reliability. The COB light source usually includes a substrate, on which are provided a light-emitting area, a cold light positive electrode pad, a cold light negative electrode pad, a warm light positive electrode pad, a warm light negative electrode pad and a conductive circuit; COB light sources are widely used due to their long life, pollution-free and high light efficiency. However, the existing COB light source itself does not have a constant voltage function. If the input voltage is unstable, it will cause other light-emitting chips to have overcurrent or not light up, affecting the light-emitting effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the above-mentioned defects of the prior art, a constant voltage two-color flip-chip COB light source is provided, which stably adjusts the connected power supply voltage by welding a constant voltage IC chip on the constant voltage IC pad, protects the internal chip from the influence of high voltage surge, and realizes the constant voltage function; and can maintain the current of the warm light chip and the cold light chip constant, avoids the phenomenon of overcurrent or no light, and has a good luminous effect.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A constant voltage two-color flip-chip COB light source comprises a COB substrate, on which a plurality of power pads, a plurality of warm light chip pad groups connected in sequence, a plurality of cold light chip pad groups connected in sequence and a plurality of constant voltage IC pads are arranged, the power pads, the warm light chip pad groups and the cold light chip pad groups are all connected to the constant voltage IC pads, a constant voltage IC chip is welded on the constant voltage IC pads, and a warm light chip and a cold light chip are respectively welded on the warm light chip pad group and the cold light chip pad group.

[0006] Preferably, the constant voltage IC pad consists of a VP terminal pad, a VDD terminal pad and a VN terminal pad, and the pins of the constant voltage IC chip are respectively welded to the VP terminal pad, the VDD terminal pad and the VN terminal pad.

[0007] Preferably, the VN terminal pad is electrically connected to the power supply pad, and the VP terminal pad and the VDD terminal pad are both electrically connected to the warm light chip pad group and the cold light chip pad group.

[0008] Preferably, the power pad includes a first power pad and a second power pad, and the first power pad and the second power pad are sequentially distributed at opposite corners of the COB substrate.

[0009] Preferably, the constant voltage IC pad comprises a first constant voltage IC pad and a second constant voltage IC pad which are symmetrically arranged with each other, and a first constant voltage IC chip and a second constant voltage IC chip are respectively soldered on the first constant voltage IC pad and the second constant voltage IC pad.

[0010] Preferably, the constant voltage IC pad and the power pad are arranged around the warm light chip pad group and the cold light chip pad group in sequence.

[0011] By adopting the above technical scheme, the utility model provides a constant voltage type two-color flip-chip COB light source, which has the following beneficial effects: the power supply pad, the warm light chip pad group and the cold light chip pad group in the constant voltage type two-color flip-chip COB light source are all connected to the constant voltage IC pad, a constant voltage IC chip is welded on the constant voltage IC pad, and a warm light chip and a cold light chip are welded on the warm light chip pad group and the cold light chip pad group, respectively, and the connected power supply voltage is stably adjusted by welding the constant voltage IC chip on the constant voltage IC pad, thereby keeping the line voltage stable, protecting the internal chip from the influence of high-voltage surge, and realizing the constant voltage function, which can keep the current of the warm light chip and the cold light chip constant, avoiding the phenomenon of overcurrent or not lighting, having good luminous effect, high working stability, and being able to match the constant voltage power supply and control system on the market, having a wide range of applications, a unique and reasonable circuit layout, and a beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 This is a circuit schematic diagram of the constant voltage IC chip in the utility model;

[0014] In the figure, 1-COB substrate, 2-warm light chip pad group, 3-cold light chip pad group, 4-first power pad, 5-second power pad, 6-first constant voltage IC pad, 7-second constant voltage IC pad, 8-VP end pad, 9-VDD end pad, 10-VN end pad, 11-first constant voltage IC chip, 12-warm light chip, 13-cold light chip, 14-second constant voltage IC chip. DETAILED DESCRIPTION

[0015] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0018] like Figure 1 As shown, in the structural schematic diagram of the utility model, the constant voltage two-color flip-chip COB light source includes a COB substrate 1, on which are provided a plurality of power pads, a plurality of warm light chip pad groups 2 connected in sequence, a plurality of cold light chip pad groups 3 connected in sequence and a plurality of constant voltage IC pads, the power pad, the warm light chip pad group 2 and the cold light chip pad group 3 are all connected to the constant voltage IC pad, a constant voltage IC chip is welded on the constant voltage IC pad, and a warm light chip 12 and a cold light chip 13 are welded on the warm light chip pad group 2 and the cold light chip pad group 3, respectively. It can be understood that the COB substrate 1 is square in shape and may be an aluminum substrate, etc.; the cross-section of the COB substrate 1 is square or rectangular, etc. The power pad, warm light chip pad group 2, cold light chip pad group 3 and constant voltage IC pad are all welded on the COB substrate 1. The power pad can be used to connect to an external power supply. The COB substrate 1 may be a general PCB circuit board, etc., or an aluminum light source substrate, etc.

[0019] Specifically, the constant voltage IC pad is composed of a VP terminal pad 8, a VDD terminal pad 9 and a VN terminal pad 10, and the pins of the constant voltage IC chip are respectively welded to the VP terminal pad 8, the VDD terminal pad 9 and the VN terminal pad 10; the VN terminal pad 10 is electrically connected to the power pad, and the VP terminal pad 8 and the VDD terminal pad 9 are both electrically connected to the warm light chip pad group 2 and the cold light chip pad group 3; the power pad includes a first power pad 4 and a second power pad 5 , the first power pad 4 and the second power pad 5 are sequentially arranged at the diagonal positions of the COB substrate 1; the constant voltage IC pad includes a first constant voltage IC pad 6 and a second constant voltage IC pad 7 symmetrically arranged, and the first constant voltage IC pad 6 and the second constant voltage IC pad 7 are respectively welded with a first constant voltage IC chip 11 and a second constant voltage IC chip 14; the constant voltage IC pad and the power pad are sequentially arranged around the warm light chip pad group 2 and the cold light chip pad group 3. It can be understood that the above chipset can also have chipsets of other colors, which are only exemplified and are not limited by the present invention.

[0020] It can be understood that the number of the constant voltage IC pads can be set according to demand, and the VDD terminal pad 9 is located between the VP terminal pad 8 and the VN terminal pad 10; Figure 2 As shown, in actual application, the constant voltage IC chip can be a universal constant voltage triode, including a P-channel transistor or an N-channel transistor, etc. The above is only an example and the present utility model does not limit it.

[0021] It is understandable that the warm light chip and the cold light chip can be warm white light LED chips, cold white light LED chips or LED light beads, etc., and the working voltage of each group of chips is consistent. The chip pad group can also have a variety of arrangement orders, which will not be repeated in the present invention.

[0022] It can be understood that the utility model has a reasonable design and a unique structure. It stabilizes the connected power supply voltage by welding a constant voltage IC chip on the constant voltage IC pad, thereby maintaining the line voltage stable, protecting the internal chip from the influence of high-voltage surges, and realizing the constant voltage function. It can maintain the current of the warm light chip and the cold light chip constant to avoid overcurrent or non-lighting. It has good luminous effect and high working stability. It can match the constant voltage power supply and control system on the market, has a wide range of applications, a unique and reasonable circuit layout, and a beautiful appearance.

[0023] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A constant voltage dual-color flip-chip COB light source, comprising a COB substrate, characterized in that: The COB substrate is provided with a plurality of power pads, a plurality of warm light chip pad groups connected in sequence, a plurality of cold light chip pad groups connected in sequence and a plurality of constant voltage IC pads. The power pads, the warm light chip pad groups and the cold light chip pad groups are all connected to the constant voltage IC pads. A constant voltage IC chip is welded on the constant voltage IC pads. A warm light chip and a cold light chip are welded on the warm light chip pad group and the cold light chip pad group, respectively.

2. The constant voltage dual-color flip-chip COB light source according to claim 1, characterized in that: The constant voltage IC pad is composed of a VP terminal pad, a VDD terminal pad and a VN terminal pad, and the pins of the constant voltage IC chip are respectively welded to the VP terminal pad, the VDD terminal pad and the VN terminal pad.

3. The constant voltage dual-color flip-chip COB light source according to claim 2, characterized in that: The VN terminal pad is electrically connected to the power supply pad, and the VP terminal pad and the VDD terminal pad are both electrically connected to the warm light chip pad group and the cold light chip pad group.

4. The constant voltage dual-color flip-chip COB light source according to claim 1, characterized in that: The power pads include a first power pad and a second power pad, and the first power pad and the second power pad are sequentially distributed at diagonal positions of the COB substrate.

5. The constant voltage dual-color flip-chip COB light source according to claim 2, characterized in that: The constant voltage IC pad comprises a first constant voltage IC pad and a second constant voltage IC pad which are symmetrically arranged with each other, and a first constant voltage IC chip and a second constant voltage IC chip are respectively welded on the first constant voltage IC pad and the second constant voltage IC pad.

6. The constant voltage dual-color flip-chip COB light source according to claim 2, characterized in that: The constant voltage IC pad and the power pad are arranged around the warm light chip pad group and the cold light chip pad group in sequence.

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