Projector
AssigneeSeiko Epson Corporation
InventorsJoji Karasawa, Yoshitaka Ito
Life of this patent
Estimating the term…
Abstract
The invention suppresses the expansion of an illuminating luminous flux in the short-side direction of a sub-pixel and prevents a color mixture caused by leak of light to an adjacent pixel electrode by setting the direction of polarization separation by the polarization transforming element 40 as the long-side direction of a sub-pixel with respect to the directions of the short sides and the long sides of sub-pixels arranged correspondingly to a microlens and making the intervals between the light source images by the luminous flux separation optical element 20 more narrow in the short-side direction.
Claims24
A projector, comprising:
- a luminous flux separation optical element that separates a luminous flux from a light source into a plurality of partial luminous fluxes;
- a polarization transforming element that separates each of said plurality of partial luminous fluxes into two polarized luminous fluxes and then converts the two luminous fluxes into a single polarized luminous flux;
- an electro-optic device that modulates an illuminating luminous flux outputted from said polarization transforming element, said electro-optic device having a plurality of long and narrow pixels respectively corresponding to color lights and being arranged adjacently to one another;
- and
- a projection lens that projects a luminous flux modulated by said electro-optic device, and
- a direction of polarization separation of said plurality of partial luminous fluxes performed by said polarization transforming element coincides nearly with the long-side direction of said pixel.
A projector comprising:
- a light source;
- a color separation optical element that separates a luminous flux outputted from said light source into a plurality of color lights, said color separation optical element comprising a plurality of mirrors;
- an electro-optic device that modulates the respective color lights according to an image information to form an optical image;
- and
- a polarization transforming optical element provided at a fore stage of said color separation optical element, said polarization transforming element comprising a polarization separating film that transmits one of the two polarized luminous fluxes and reflects the other, a reflecting film that reflects a polarized luminous flux reflected by said polarization separating film nearly in the same direction as said one polarized luminous flux, and a retardation plate that aligns the polarization direction of said two polarized luminous fluxes, the direction for the said other polarized luminous flux reflected by said polarization separating film being perpendicular to a plane defined by a central axis of a luminous flux incident on said mirror and a central axis of the luminous flux reflected by said mirror.
Dependencies are inferred from the claim text.