Light source device and projection system

A projection system, comprising a light source device, an optical valve modulation component, and a projection lens;

• wherein
• the optical valve modulation component is disposed on a light-output side of the light source device and is configured to modulate and emit incident light;
• the projection lens is disposed on a light-emitting path of the optical valve modulation component and is configured to project an image of light emitted from the optical valve modulation component;
• the light source device comprises a first laser light source group, a second laser light source group, a dichroic mirror, a fluorescence converter, and an emission component;
• wherein
• the first laser light source group comprises a first laser light source, the first laser light source being configured to emit laser light of a first waveband;
• and the second laser light source group at least comprises a second laser light source and a third laser light source, the second laser light source being configured to emit laser light of a second waveband, and the third laser light source being configured to emit laser light of a third waveband;
• the dichroic mirror is disposed on light-output sides of the first laser light source group and the second laser light source group, and the fluorescence converter and the emission component are respectively disposed on a light-output side of the dichroic mirror;
• the dichroic mirror is configured to emit the laser light of the first waveband, the laser light of the second waveband, and the laser light of the third waveband, and the fluorescence converter is capable of generating target fluorescence under excitation of the laser light of the first waveband, wherein the target fluorescence is reflected by the dichroic mirror to the emission component, and the target fluorescence is capable of providing fluorescence of the second waveband and fluorescence of the third waveband;
• and
• the light source device comprises at least three light beams, wherein the at least three light beams are emitted from the emission component according to a time sequence, and the at least three light beams comprise the laser light of the first waveband which is emitted separately, the laser light of the second waveband and the fluorescence of the second waveband which are combined and emitted, and the laser light of the third waveband and the fluorescence of the third waveband which are combined and emitted;
• wherein at least a partial region of the dichroic mirror has a transmittance greater than a first probability threshold to light with a wavelength within a target wavelength range, and has a transmittance less than a second probability threshold to light with a wavelength outside the target wavelength range, the first probability threshold being greater than the second probability threshold;
• wherein the wavelength within the target wavelength range meets a condition that an absolute value of a wavelength difference between the wavelength and a central wavelength of the laser light of the first waveband emitted from the first laser light source group is less than a wavelength difference threshold, or an absolute value of a wavelength difference between the wavelength and a central wavelength of either of the laser light of the second waveband and the laser light of the third waveband emitted from the second laser light source group is less than the wavelength difference threshold, wherein the wavelength difference threshold ranges from 3 nm to 10 nm.

A light source device, comprising a first laser light source group, a second laser light source group, a dichroic mirror, a fluorescence converter, and an emission component;

• wherein
• the first laser light source group comprises a first laser light source, the first laser light source being configured to emit laser light of a first waveband;
• and the second laser light source group at least comprises a second laser light source and a third laser light source, the second laser light source being configured to emit laser light of a second waveband, and the third laser light source being configured to emit laser light of a third waveband;
• the dichroic mirror is disposed on light-output sides of the first laser light source group and the second laser light source group, and the fluorescence converter and the emission component are respectively disposed on a light-output side of the dichroic mirror;
• the dichroic mirror is configured to emit the laser light of the first waveband, the laser light of the second waveband, and the laser light of the third waveband, and the fluorescence converter is capable of generating target fluorescence under excitation of the laser light of the first waveband, wherein the target fluorescence is reflected by the dichroic mirror to the emission component, and the target fluorescence is capable of providing fluorescence of the second waveband and fluorescence of the third waveband;
• and
• the light source device comprises at least three light beams, wherein the at least three light beams are emitted from the emission component according to a time sequence, and the at least three light beams comprise the laser light of the first waveband which is emitted separately, the laser light of the second waveband and the fluorescence of the second waveband which are combined and emitted, and the laser light of the third waveband and the fluorescence of the third waveband which are combined and emitted;
• wherein the light source device comprises a second light-output path, wherein the second light-output path comprises:
• a path along which the laser light of the first waveband is emitted via the dichroic mirror, the fluorescence converter, the dichroic mirror, and the emission component;
• a path along which the laser light of the second waveband passes through the dichroic mirror, the fluorescence converter, the dichroic mirror, and the emission component, and is combined with the fluorescent light of the second waveband at the emission component and is emitted from the emission component;
• and
• a path along which the laser light of the third waveband passes through the dichroic mirror, the fluorescence converter, the dichroic mirror, and the emission component, and is combined with the fluorescent light of the third waveband at the emission component and is emitted from the emission component.