Laser backside irradiation device and liquid crystal display device

A laser backside irradiation device comprising:

• a laser light source;
• a splitting optical system for splitting laser light emitted from the laser light source into a plurality of laser beams;
• and
• a plurality of illumination optical systems for illuminating a two-dimensional spatial modulator for two-dimensionally modulating a light intensity from a backside thereof,
• wherein the illumination optical systems, of the plurality of illumination optical systems, respectively and two-dimensionally expand the plurality of laser beams split by the splitting optical system to illuminate divided regions on the two-dimensional spatial modulator, respectively, and
• wherein a sum of areas of the divided regions on the two-dimensional spatial modulator to be illuminated by the plurality of illumination optical systems respectively is set larger than an area of the two-dimensional spatial modulator.

A laser backside irradiation device comprising:

• a laser light source;
• a splitting optical system for splitting laser light emitted from the laser light source into a plurality of laser beams;
• a plurality of illumination optical systems for illuminating a two-dimensional spatial modulator for two-dimensionally modulating a light intensity from a backside thereof;
• and
• a light source driving section for two-dimensionally rotating the laser light source in a plane perpendicular to an optical axis of the laser light,
• wherein the illumination optical systems, of the plurality of illumination optical systems, respectively and two-dimensionally expand the plurality of laser beams split by the splitting optical system to illuminate divided regions on the two-dimensional spatial modulator, respectively.

A laser backside irradiation device comprising:

• a laser light source;
• a splitting optical system for splitting laser light emitted from the laser light source into a plurality of laser beams;
• and
• a plurality of illumination optical systems for illuminating a two-dimensional spatial modulator for two-dimensionally modulating a light intensity from a backside thereof,
• wherein the illumination optical systems, of the plurality of illumination optical systems, respectively and two-dimensionally expand the plurality of laser beams split by the splitting optical system to illuminate divided regions on the two-dimensional spatial modulator, respectively,
• wherein the splitting optical system includes a plurality of splitting elements for splitting the laser light into the plurality of laser beams toward the plurality of illumination optical systems,
• wherein the laser backside irradiation device further includes a splitting element driving section for oscillating each splitting element of the plurality of splitting elements, and
• wherein the splitting element driving section oscillates optical paths of the plurality of laser beams split by the plurality of splitting elements.

A laser backside irradiation device comprising:

• a laser light source;
• a splitting optical system for splitting laser light emitted from the laser light source into a plurality of laser beams;
• and
• a plurality of illumination optical systems for illuminating a two-dimensional spatial modulator for two-dimensionally modulating a light intensity from a backside thereof,
• wherein the illumination optical systems, of the plurality of illumination optical systems, respectively and two-dimensionally expand the plurality of laser beams split by the splitting optical system to illuminate divided regions on the two-dimensional spatial modulator, respectively,
• wherein the splitting optical system includes a plurality of splitting elements for allowing the plurality of laser beams to be incident to the plurality of illumination optical systems, respectively, and
• wherein each illumination optical system of the plurality of illumination optical systems includes a first reflecting element for reflecting a laser beam, of the plurality of laser beams, incident from a corresponding splitting element of the plurality of splitting elements, and includes a second reflecting element for reflecting the laser beam reflected by the first reflecting element toward a predetermined corresponding region on the two-dimensional spatial modulator.