Prism structure and projector
View Patent ↗A prism structure that includes: a plurality of liquid crystal devices each include a liquid crystal panel and a light emitting-side optical element, and generate an image light through modulation of any of a plurality of color lights in accordance with image information; and a cross dichroic prism that combines the image lights coming from the liquid crystal devices. In the prism structure, each of the liquid crystal devices further includes: a fixture member that is fixed to the cross dichroic prism; a retention member that keeps hold of the liquid crystal panel, and is fixed to the fixture member; and a light emitting-side optical element retention member that keeps hold of the light emitting-side optical element, and is rotation-adjustable about an illumination axis. The light emitting-side optical element retention member is rotation-adjusted about the illumination axis before fixation to the retention member.
1. A prism structure, comprising:
a plurality of liquid crystal devices each including a liquid crystal panel and a light emitting-side optical element, and generating an image light through modulation of any of a plurality of color lights in accordance with image information; and
a cross dichroic prism that combines the image lights coming from the liquid crystal devices,
each of the liquid crystal devices further including:
a fixture member that is fixed to the cross dichroic prism;
a retention member that keeps hold of the liquid crystal panel, and is fixed to the fixture member, the retention member having a single guiding arc-shaped hole for rotation adjustment of the light emitting-side optical element;
a light emitting-side optical element retention member that (1) keeps hold of the light emitting-side optical element, (2) is rotation-adjustable about an illumination axis, (3) is provided with only two pins for insertion into the guiding arc-shaped hole, and (4) is rotation-adjusted about the illumination axis before fixation to the retention member; and
a fixing member that fixes the light emitting-side optical element retention member to the retention member.
2. The prism structure according to claim 1 , wherein the light emitting-side optical element retention member is subjected to rotation adjustment while being pushed against the retention member before attachment fixation to the retention member.
3. The prism structure according to claim 2 , wherein the light emitting-side optical element retention member is provided with a hold section for holding the retention member, and the light emitting-side optical element retention member is subjected to rotation adjustment while being pushed against the retention member by elasticity of the hold section before attachment fixation to the retention member.
4. The prism structure according to claim 1 , the light emitting-side optical element is a viewing angle compensation plate.
5. The prism structure according to claim 1 , wherein the liquid crystal devices are each further provided with a light emitting-side polarizer that is attached to the cross dichroic prism, and the light emitting-side optical element is a second light emitting-side polarizer.
6. The prism structure according to claim 4 , wherein the retention member keeps hold of the light emitting-side optical element with a space both from the liquid crystal panel and the light emitting-side polarizer.
7. The prism structure according to claim 1 , wherein the light emitting-side optical element is a light emitting-side polarizer.
8. A projector, comprising:
an illumination device;
a color separation light guiding system that separates an illumination light coming from the illumination device into a plurality of color lights;
a prism structure according to claim 1 that emits an image light as a result of modulation and combination of the color lights coming from the color separation light guiding system in accordance with image information; and
a projection system that projects the image light emitted from the prism structure.
9. The projector according to claim 8 , wherein the light emitting-side optical element retention member is subjected to rotation adjustment while being pushed against the retention member before attachment fixation to the retention member.
10. The projector according to claim 9 , wherein the light emitting-side optical element retention member is provided with a hold section for holding the retention member, and the light emitting-side optical element retention member is subjected to rotation adjustment while being pushed against the retention member by elasticity of the hold section before attachment fixation to the retention member.
11. The projector according to claim 8 , wherein the liquid crystal devices are each further provided with a light emitting-side polarizer that is attached to the cross dichroic prism, and the light emitting-side optical element is a viewing angle compensation plate.
12. The projector according to claim 8 , wherein the liquid crystal devices are each further provided with a light emitting-side polarizer that is attached to the cross dichroic prism, and the light emitting-side optical element is a second light emitting-side polarizer.
13. The projector according to claim 11 , wherein the retention member keeps hold of the light emitting-side optical element with a space both from the liquid crystal panel and the light emitting-side polarizer.
14. The projector according to claim 8 , wherein the light emitting-side optical element is a light emitting-side polarizer.