An adjustable light source device and lighting device

Abstract

The invention discloses an adjustable light source device. The light source device comprises a blue light source and a wavelength conversion device. Light emitted by the blue light source is emitted into the wavelength conversion device. The wavelength conversion device comprises a light-emitting layer and a reflecting layer. The light-emitting layer comprises fluorescent powder, high-refraction scattering particles, low-fraction scattering particles and a bonding material. The light-emitting layer comprises a first area and a second area. The volume ratio of the high-refraction scattering particles to the low-fraction scattering particles in the first area is larger than the volume ratio of the high-refraction scattering particles to the low-fraction scattering particles in the second area. The adjustable light source device further comprises an adjusting device which is used for adjustment so that light emitted by the blue light source can be emitted to the first area or the second area, when the light emitted by the blue light source irradiates the first area, the wavelength conversion device emits first emergent light, when the light emitted by the blue light source irradiates the second area, the wavelength conversion device emits second emergent light, and the color temperature of the first emergent light is higher than the color temperature of the second emergent light. Thus, the color temperature of the emergent light is changed under the condition that the brightness of the emergent light is not changed.

Description

technical field [0001] The invention relates to the lighting field, in particular to an adjustable light source device and a lighting device. Background technique [0002] At present, in the fields of lighting and projection, it is difficult to obtain white light through bulbs to meet the requirements of high brightness, and the technical solution of using semiconductor light sources to obtain white light is becoming more and more popular. Since white light is a wide-spectrum light, it is impossible to directly use semiconductors to emit white light. Therefore, there are currently two ways to use semiconductors to generate white light. One is to cover the phosphor powder on the light-emitting surface of the blue light semiconductor, use the blue light semiconductor light-emitting device to excite the phosphor powder, and use the yellow light generated by the excitation to combine with the unabsorbed blue light to generate white light; the other way is to divide into two ligh...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defect of difficult adjustment of white light color temperature in the prior art, the present invention provides an adjustable light source device without affecting the brightness of outgoing light:

Images