CN105546366A - LED laminated light source module capable of achieving light color adjustment - Google Patents

Abstract

The invention discloses an LED laminated light source module with adjustable light color. The light source module comprises: a multi-layer substrate, the center of each layer of the multi-layer substrate is provided with a step-shaped through hole, and each layer of the substrate has a A circuit layer is evenly distributed on the surface; a plurality of LED light-emitting chips are respectively manufactured in the step-shaped through holes of each substrate, and are electrically connected with the circuit layer on the surface of the corresponding substrate. The LED laminated light source module with adjustable light color disclosed by the present invention has the characteristics of adjustable light color, small area, easy light mixing, uniform light output, diverse light output colors and long service life.

Description

An LED laminated light source module with adjustable light color

technical field

The invention relates to an LED light source, in particular to an LED light source which mixes light by controlling a plurality of LED chips with different wavelengths.

Background technique

LED (light emitting diode), that is, light-emitting diode, is considered to be the third-generation lighting technology after incandescent lamps and fluorescent lamps in the history of human lighting. It is a new type of high-efficiency solid-state light source with small size, fast response, long life, energy saving, It has obvious advantages such as green and environmental protection, and has been widely used in indoor and outdoor and many special lighting occasions.

The emergence of LED has broken the design methods and ideas of traditional light sources, and two new design concepts have emerged. One is scene lighting: design lamps and lanterns according to the needs of the environment, create a beautiful and gorgeous lighting environment, to enhance the effect of the scene, and make people feel the atmosphere of the scene. The other is mood lighting: design lamps and lanterns based on people's needs, take people's emotions as the starting point, and create an artistic lighting environment from the perspective of people.

Regardless of the design concept, it is necessary to use multiple LEDs with different wavelengths to control the light mixing separately. The current light-mixing and color-mixing LED modules planarly package multiple LED chips with different wavelengths on the substrate, and the placement area is large. The distance between them is large, and it is difficult to achieve uniform light mixing.

Contents of the invention

The object of the present invention is to provide an adjustable light color LED laminated light source module, the light color adjustable LED laminated light source module has the advantages of adjustable light color, small area, easy to mix light, uniform light output, and diversity of light output colors , The characteristics of long service life.

An LED stacked light source module with adjustable light color provided by the present invention includes:

A multi-layer substrate 1, the center of each layer of the multi-layer substrate 1 is provided with a step-shaped through hole, and the surface of each layer of the substrate is evenly distributed with a circuit layer;

A plurality of LED light-emitting chips 2, the plurality of LED light-emitting chips 2 are respectively manufactured in the step-shaped through holes of each layer of the substrate, and are electrically connected with the circuit layer on the surface of the corresponding substrate.

The number of layers of the multi-layer substrate 1 is at least two, and one LED light-emitting chip 2 is fixed on each layer of the substrate.

From top to bottom, the size of each substrate increases sequentially.

The centers of the substrates of the multilayer substrate 1 are aligned and vertically stacked together, and the circuit pads of each substrate are exposed, so as to facilitate the control of external circuits.

The material for making the multi-layer substrate 1 is a material with high thermal conductivity.

The shape of the through holes is circular or square, and the size of each through hole is smaller than the size of the corresponding LED light-emitting chip.

The number of the LED light-emitting chips 2 is at least two, and they are LED light-emitting chips with different wavelengths.

The LED light-emitting chip 2 is a metal transparent LED chip without a back reflector, which facilitates the light from the bottom chip to pass through the top chip.

The surface of the LED light-emitting chip 2 is coated with transparent silica gel or fluorescent powder glue excited by it.

The wavelength range of the LED light-emitting chip 2 is from 300nm to 780nm.

The beneficial effect of the present invention is that in the LED stacked light source module with adjustable light color, multi-layer substrates are used, and the centers of each layer of substrates are aligned and vertically stacked together, which is conducive to reducing the area of the entire light source module. It is convenient for secondary optical design; from top to bottom, the size of the substrate increases sequentially, exposing the circuit pads of each layer of substrate, which is conducive to the control of external circuits; Inside the hole, transparent LED chips are used, and the light from the bottom chip can be transmitted through the upper chip, which is conducive to achieving uniform light mixing. The LED laminated light source module with adjustable light color of the present invention can be applied in occasions such as indoor scene light source, decorative lighting and the like.

Description of drawings

Fig. 1 is a schematic structural view of an LED laminated light source module with adjustable light color according to an embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an LED stacked light source module with adjustable light color according to an embodiment of the present invention. As shown in Fig. 1, the LED stacked light source module with adjustable light color includes:

A multi-layer substrate 1, the center of each layer of the multi-layer substrate 1 is provided with a step-shaped through hole, and the surface of each layer of the substrate is evenly distributed with a circuit layer, so as to be electrically connected to the LED chip;

Wherein, the number of layers of the multi-layer substrate 1 is at least 2 layers. From top to bottom, the size of each layer of substrate increases sequentially, and each layer of substrate is fixed with one LED light-emitting chip 2. The more layers, the controllable LED light emitting chip 2 The more types of chips, the richer the dimming colors that can be achieved.

The centers of the substrates of the multilayer substrate 1 are aligned and vertically stacked together, and the circuit pads of each substrate are exposed, so as to facilitate the control of external circuits.

The material for making the multilayer substrate 1 may be PCB, alumina ceramics, aluminum nitride ceramics and other materials, all of which are high thermal conductivity materials that are easy to realize circuit processing.

The shape of the through hole can be circular, square, etc. The size of each through hole is smaller than the size of the corresponding LED light-emitting chip, which is convenient for fixing the LED light-emitting chip and facilitates the light transmission of the underlying LED light-emitting chip.

A plurality of LED light-emitting chips 2 are respectively manufactured in the step-shaped through holes of each layer of the substrate, and are electrically connected to the circuit layer on the surface of the corresponding substrate through a process similar to gold wire bonding.

Wherein, the number of the LED light-emitting chips 2 is at least two, and they are LED light-emitting chips with different wavelengths.

The LED light-emitting chip 2 is a metal transparent LED chip without a back reflector, which facilitates the light from the bottom chip to pass through the top chip.

The surface of the LED light-emitting chip 2 is coated with transparent silica gel or fluorescent powder glue excited by it.

The wavelength range of the LED light-emitting chip 2 is from 300nm to 780nm.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. An LED stacked light source module with adjustable light color, characterized in that the light source module comprises: A multi-layer substrate (1), the center of each layer of the multi-layer substrate (1) is provided with a step-shaped through hole, and the surface of each layer of the substrate is evenly distributed with a circuit layer; A plurality of LED light-emitting chips (2), the plurality of LED light-emitting chips (2) are respectively manufactured in the step-shaped through holes of each layer of substrate, and are electrically connected with the circuit layer on the surface of the corresponding substrate. 2. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, the number of layers of the multilayer substrate (1) is at least 2 layers, and each layer of substrate is fixed with one LED light-emitting chip ( 2). 3. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, from top to bottom, the size of each layer of substrates increases sequentially. 4. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, the centers of each layer of the multi-layer substrate (1) are aligned and stacked vertically to expose each layer of substrate Circuit pads for external circuit control. 5. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, the material of the multilayer substrate (1) is a material with high thermal conductivity. 6. The LED stacked light source module with adjustable light color according to claim 1, wherein the shape of the through holes is circular or square, and the size of each through hole is smaller than the size of the corresponding LED light emitting chip. 7. The LED stacked light source module with adjustable light color according to claim 1, characterized in that the number of said LED light-emitting chips (2) is at least two, and they are LED light-emitting chips of different wavelengths. 8. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, the LED light-emitting chip (2) is a transparent LED chip without a back reflector metal, which facilitates the light from the bottom chip to pass through the upper layer Chip leaked out. 9. The LED stacked light source module with adjustable light color according to claim 1, characterized in that, the surface of the LED light-emitting chip (2) is coated with transparent silica gel or phosphor glue excited by it. 10. The LED stacked light source module with adjustable light color according to claim 1, characterized in that the wavelength range of the LED light-emitting chip (2) is from 300nm to 780nm.