Illuminating system and projecting apparatus

Abstract

An illuminating system comprises a blue incoherent light source, a coherent light source, a fluorescent module and a light-combined unit. The blue incoherent light source is used for sending out a blue incoherent light beam. The coherent light source is used for sending out a coherent light beam, wherein the wavelength of the coherent light beam is smaller than or equal to that of the blue incoherent light beam. The fluorescent module is provided with a first color fluorescent area and a second color fluorescent area. The first color fluorescent area and the second color fluorescent area take turns to cut into a transmitting path of the coherent light beam to respectively change the coherent light beam into a first color light beam and a second color light beam. The light-combined unit is arranged on the transmitting paths of the blue incoherent light beam, the first color light beam and the second color light beam to combine the blue incoherent light beam, the first color light beam and the second color light beam. The invention further provides a projecting apparatus.

Description

technical field [0001] The invention relates to a light source and a display device, and in particular to an illumination system and a projection device. Background technique [0002] Projection devices generally use ultra high pressure lamps (UHP lamps) as light sources, and in recent years there is also a trend of using light-emitting diodes (light-emitting diodes, LEDs) as light sources. Although light-emitting diodes have the advantages of fast response, no warm-up time, energy saving, environmental protection, and long service life, the brightness of light-emitting diodes is lower than that of high-pressure mercury lamps, making it difficult to apply light-emitting diodes to high-brightness in the prior art. projection device. [0003] One existing technique is to use a pure laser source to excite phosphors to produce multiple colors. In this prior art, the blue light is a blue laser that passes through an optical element. Due to the high coherence of the blue laser,...

AI Technical Summary

Problems solved by technology

However, the long-term irradiation of the diffusion sheet by the blue laser will have reliability problems, thereby reducing the service life of the projection device.

In addition, in the prior art, the design of blue laser penetrating optical elements will be combined with other optical elements to form a complete optical path, which tends to make the overall optical path occupy a large volume, making it difficult to reduce the overall volume of the projection device

In addition, the use of other optical components is also likely to lead to cost increases

Furthermore, the color of the blue laser is more blue-purple than true blue, which is more likely to affect the color quality of the image screen of the projection device

Images