Liquid crystal projection apparatus utilizing image synthesizing unit with liquid crystal panel holders
View Patent ↗A liquid crystal projection apparatus having an image synthesizing unit including a color synthesization prism having an upper surface, a lower surface facing the upper surface, and three light incident faces between the upper and lower surfaces; an upper prism pedestal provided on the upper surface of the color synthesization prism; a lower prism pedestal provided on the lower surface of the color synthesization prism; an upper liquid crystal panel holder provided on the upper prism pedestal and having first jointing sections, a lower liquid crystal panel holder provided on the lower prism pedestal and having second jointing sections; three liquid crystal panels; and three liquid crystal panel mounting members securely fixing thereon the three liquid crystal panels, the three mounting members arranged on the respective three incident faces of the color synthesization prism joining the first jointing sections located in association with the respective incident faces to corresponding second jointing sections located in association with the corresponding incident faces.
1. A liquid crystal projection apparatus for projecting colored imaging light obtained by image synthesizing means that is adapted to illuminate three liquid crystal panels with lights of three primary colors to generate imaging lights of three primary colors and synthesize the imaging lights into the colored imaging light, the image synthesizing means comprising:
a color synthesization prism having an upper surface, a lower surface facing the upper surface, and three incident faces between the upper and lower surfaces;
an upper prism pedestal provided on the upper surface of the color synthesization prism;
a lower prism pedestal provided on the lower surface of the color synthesization prism;
an upper liquid crystal panel holder provided on top of the upper prism pedestal and having a multiplicity of first jointing sections,
a lower liquid crystal panel holder provided on the bottom of the lower prism pedestal and having a multiplicity of second jointing sections;
three liquid crystal panels; and
three liquid crystal panel mounting members securely fixing thereon the three liquid crystal panels, the three liquid crystal panel mounting members arranged on the respective three incident faces of the color synthesization prism and adapted to joint the first jointing sections located in association with the respective incident faces to corresponding second jointing sections located in association with the corresponding incident faces.
2. The liquid crystal projection apparatus according to claim 1 , wherein the upper prism pedestal has a generally quadrangular first frame and four first projecting sections extending from the four corners of the first frame; and
the upper liquid crystal panel holder is mounted on the upper prism pedestal by fixing the upper liquid crystal panel holder to the four first projecting sections to allow the sections of the upper liquid crystal panel holder coupled to the upper prism pedestal to be located close to the respective first jointing sections.
3. The liquid crystal projection apparatus according to claim 2 , wherein the coupling of the upper liquid crystal panel holder and the prism pedestal is implemented by means of screws that penetrate the upper liquid panel holder and get screwed in the threaded bores formed in the first projecting sections of the upper prism pedestal.
4. The liquid crystal projection apparatus according to claim 1 , wherein
the lower prism pedestal has a generally quadrangular second frame and four second projecting sections extending from the four corners of the second frame; and
the lower liquid crystal panel holder is mounted on the lower prism pedestal by fixing the lower liquid crystal panel holder to the four second projecting sections of the lower prism pedestal to allow the sections of the lower liquid crystal panel holder coupled to the lower prism pedestal to be located close to the respective second jointing sections.
5. The liquid crystal projection apparatus according to claim 4 , wherein the coupling of the lower liquid crystal panel holder and the lower prism pedestal is implemented by means of screws that penetrate the lower liquid panel holder and get screwed in the threaded bores formed in the second projecting sections of the lower prism pedestal.
6. The liquid crystal projection apparatus according to claim 1 , wherein
the upper liquid crystal panel holder has a first body and four first arm sections that extend from the respective four corners of the first body; and
the first jointing sections are each provided at the respective ends of the first arm sections.
7. The liquid crystal projection apparatus according to claim 6 , wherein the first body is of materially reduced design as compared with the first jointing sections.
8. The liquid crystal projection apparatus according to claim 1 , wherein
the lower liquid crystal panel holder has a second body and four second arm sections that extend from the respective four corners of the second body; and
the second jointing sections are each provided at the respective ends of the second arm sections.
9. The liquid crystal projection apparatus according to claim 8 , wherein the second body is of materially reduced design as compared with the second jointing sections.
10. The liquid crystal projection apparatus according to claim 1 , wherein the first jointing sections of the upper liquid crystal penal holder and the second jointing sections of the lower liquid crystal panel holder are jointed to the liquid crystal panel mounting members by either soldering or by bonding.