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Device for obtaining mixed light type point light source

A point light source and mixed light technology, which is applied in the field of devices for obtaining mixed light point light sources, can solve the problems of difficult to control and avoid color temperature drift, uneven light emission, low light efficiency, etc., to improve color and brightness quality, improve Luminous reliability, small size effect

Inactive Publication Date: 2012-01-18
GUANGDONG VTRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary LEDs have the problem of large individual differences, and it is difficult to meet the requirements of maintaining good consistency in color temperature and brightness of multiple LED light sources.
Even with finely divided and BIN-selected LED lamp beads, it is still difficult to control and avoid their color temperature drift after a period of use
Although there are LED point light sources that combine multiple light-emitting chips with mixed light to control the color drift within an acceptable range, due to the limitations of production technology and cost, it is still impossible to obtain LED point light sources with full color temperature.
In addition, some LED point light sources have quality and reliability problems such as uneven light emission, low light efficiency, and even damage, which increases the difficulty of obtaining high-quality point light sources.

Method used

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  • Device for obtaining mixed light type point light source
  • Device for obtaining mixed light type point light source
  • Device for obtaining mixed light type point light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0034] A device for obtaining a light-mixing point light source, including a plurality of LED lamp beads 1, a circuit substrate 2 and an open hemispherical hollow diffuse reflection cavity 3, its overall structure is similar to that of Embodiment 1, the main difference is: the circuit substrate The LED lamp beads 11-19 on 2 are symmetrically distributed in the diffuse reflection cavity in a ring arrangement, such as Figure 7 shown. The light emitted by the LED lamp bead undergoes multiple diffuse reflections in the diffuse reflection cavity, and the light is uniformly mixed and emitted from the light exit hole 4 . The LEDs arranged in a ring in the diffuse reflection cavity can also obtain the same light output effect as in Embodiment 1, and obtain a high-quality light source.

Embodiment 3

[0036] A device for obtaining a light-mixing point light source, including a plurality of LED lamp beads 1, a circuit substrate 2 and an open hemispherical hollow diffuse reflection cavity 3, its overall structure is similar to that of Embodiment 1, the main difference is: the circuit substrate The LED lamp beads 11-19 on 2 are connected in parallel, and the LED light sources 12, 14, 15, 16, 18 are in the on state through circuit control, and the LED light sources 11, 13, 17, 19 are in the off state, such as Figure 8 shown. When an LED lamp bead in the cavity is damaged, it can be switched to light up the lamp bead in the off state to ensure that the brightness and color temperature of the light output remain unchanged and improve the reliability of the light source. When switching, if it is ensured that the LEDs lit in the cavity are symmetrical to each other, the effect will be better.

Embodiment 4

[0038] A device for obtaining a light-mixing point light source, including a plurality of LED lamp beads 1, a circuit substrate 2 and an open hemispherical hollow diffuse reflection cavity 3, its overall structure is similar to that of Embodiment 1, the main difference is: the circuit substrate The LED lamp beads 11-19 on 2 are white LEDs with color temperatures in different bin areas. Through a strict color scheme, after multiple LEDs are fully mixed, a light source with higher color temperature accuracy can be obtained.

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PUM

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Abstract

The invention discloses a device for obtaining a mixed light type point light source, which comprises at least one LED (light-emitting diode) lamp bead, a circuit substrate and a diffuse reflection cavity, wherein the LED lamp bead is arranged on the circuit substrate, the diffuse reflection cavity is of a hollow structure, a reflection curved surface is arranged in the cavity, and the circuit substrate is covered with the diffuse reflection cavity; the bottom of the diffuse reflection cavity is provided with an opening; the opening is used for enabling the LED lamp bead to penetrate and to be fixed in the diffuse reflection cavity, or the opening is used for enabling light rays of the LED lamp bead to shine in the diffuse reflection cavity; and the diffuse reflection cavity is also provided with a light outlet hole or a transparent medium used for enabling the light rays of the LED lamp to shine out. With the device disclosed by the invention, the lighting reliability of the light source is improved, and the consistency between color temperature and brightness of multiple point light sources is ensured.

Description

technical field [0001] The invention relates to the technical field of lighting devices, in particular to a device for obtaining mixed-light point light sources. Background technique [0002] Due to the small light-emitting area, the point light source has strong light divergence and does not interfere with each other, so it plays a very important role in the design of complex optical systems. With the progress of the times and the development of technology, people have higher and higher requirements for lighting, especially in many production and application fields, which put forward very strict requirements for the quality of light sources. In some special lighting display applications, the color temperature and brightness of multiple point light sources on a large area are required to be highly consistent, and the reliability of the light source is required to be high. Ordinary point light sources cannot meet their needs due to the large individual differences. [0003] ...

Claims

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Application Information

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IPC IPC(8): F21S2/00F21V7/22F21V23/00F21Y101/02
Inventor 孙婷黄永峰丁家磊
Owner GUANGDONG VTRON TECH CO LTD