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White light source and lighting device

A technology of white light source and white light, which is applied in the field of white light source and lighting device, can solve the problems of low efficiency and large volume, and achieve the effect of avoiding low luminous efficiency of light source, reducing packaging volume and cost of light source

Active Publication Date: 2020-02-07
APUTURE IMAGING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of low efficiency or large volume in the light source with the same luminous effect in the prior art, a white light source and lighting device are proposed

Method used

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  • White light source and lighting device

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Embodiment Construction

[0025] The principles and embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 As shown, the light emitting unit of the present invention uses four kinds of light emitting elements. Wherein, the first light emitting element is configured to emit cool white light, the second light emitting element is configured to emit warm white light, the third light emitting element is configured to emit neutral white light, and the fourth light emitting element is configured to emit green light. It can be understood that the first to fourth light emitting elements may be LED lamp beads, patch LEDs or other types of light emitting devices. Among them, the first light-emitting element, the second light-emitting element and the third light-emitting element are the main light output (ie power) sources. For example, the first light-emitting element and the second light-emitting element can use high-qualit...

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Abstract

The invention discloses a white light source and a lighting device. The white light source comprises: a light-emitting unit which comprises a first light-emitting element, a second light-emitting element, a third light-emitting element and a fourth light-emitting element which are uniformly arranged; a drive circuit including first, second, third and fourth drive circuits that independently control output luminance of the first, second, third and fourth light-emitting elements, respectively; and a controller used for controlling the duty ratios of the first, second, third and fourth drive circuits so that the color point of the mixed light of the first, second, third and fourth light-emitting elements falls on any point color coordinate within a certain range centered on each point on a black body curve. According to the invention, a white light source with high quality and a relatively small volume can be achieved, and the light emitting efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of LED (Light Emitting Diode), in particular to a white light source and an illuminating device using the white light source. Background technique [0002] With the vigorous development of the LED industry, a large number of LED-related application technologies and lighting equipment have appeared on the market. From white light source to R (Red) G (Green) B (Blue) light source, LED lamps have made great progress in light efficiency and practicality. However, with the development and renewal of related industries and specific application fields, higher requirements are put forward in terms of LED lighting power, stability, volume, light quality, and color rendering index. The existing LED lighting technology uses two-color temperature lamp bead ratio matching to achieve variable color temperature in light mixing, or uses RGB lamp bead plus white light bead to achieve color temperature partial green correcti...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
Inventor 黄国林谢奕
Owner APUTURE IMAGING IND CO LTD