JP2020030305A5 - - Google Patents

Claims (8)

With a laser light source
An optical modulation element that modulates the light emitted from the laser light source according to image information.
A beam expander provided in an optical path of light emitted from the laser light source between the laser light source and the light modulation element, and
Have,
The laser light source is
With the board
A photonic crystal structure having a light emitting layer that emits light, confining the light emitted by the light emitting layer in the in-plane direction of the substrate, and emitting the light in the normal direction of the substrate.
Have,
A projector in which the size of the light emitting region of the laser light source is smaller than the size of the display region of the light modulation element. With a laser light source
An optical modulation element that modulates the light emitted from the laser light source according to image information.
A beam expander provided in an optical path of light emitted from the laser light source between the laser light source and the light modulation element, and
Have,
The laser light source is
With the board
A light emitting layer that emits light and
A photonic crystal structure that traps the light emitted by the light emitting layer in the in-plane direction of the substrate and emits it in the normal direction of the substrate.
Have,
A projector in which the size of the light emitting region of the laser light source is smaller than the size of the display region of the light modulation element. In claim 1 or 2,
The beam expander
A divergent lens into which the light emitted from the laser light source is incident, and
The first condensing lens to which the light emitted from the divergent lens is incident and
Has a projector. In any one of claims 1 to 3,
Three laser light sources are provided.
The first laser light source of the three laser light sources emits red light and emits red light.
The second laser light source of the three laser light sources emits green light and emits green light.
The third laser light source of the three laser light sources emits blue light.
A projector having a first laser light source, a second laser light source, and a cross dichroic prism that synthesizes light emitted from the third laser light source. In claim 4,
Three light modulation elements are provided.
The first light modulation element of the three light modulation elements modulates the light emitted from the first laser light source.
The second light modulation element of the three light modulation elements modulates the light emitted from the second laser light source.
The third light modulation element of the three light modulation elements modulates the light emitted from the third laser light source.
The cross-dichroic prism is a projector that synthesizes light modulated by the first light modulation element, the second light modulation element, and the third light modulation element. In claim 4,
The light modulation element modulates the light synthesized by the cross dichroic prism.
The beam expander is a projector provided in the optical path of light emitted from the laser light source between the cross dichroic prism and the light modulation element. In any one of claims 1 to 5,
The light modulation element is a liquid crystal light valve having a second condensing lens, a liquid crystal layer into which light passing through the second condensing lens is incident, and an orientation layer in contact with the liquid crystal layer.
A projector in which the focus of the second condenser lens is not on the liquid crystal layer and the alignment layer. In claim 7,
A projector in which the liquid crystal layer and the alignment layer are arranged between the second condenser lens and the focal point.