Projector

Abstract

A liquid crystal panel unit is attached to a light incident surface of a prism composite. The liquid crystal panel unit includes a panel frame plate holding a liquid crystal panel, and a fixation frame plate glued and fixed to the light incident surface. The panel frame plate is fastened to the fixation frame plate by screws through an intermediate frame plate. By using wedges, the position of the panel frame plate with respect to the light incident surface is adjusted. This allows the liquid crystal panel to be reliably positioned and fixed so that the deviation amount in pixel matching is minimized and the focus adjustment can be accomplished correctly.

What is claimed is:  
     
       1. A mounting mechanism for mounting a light valve on a side surface of a prism comprising: 
       a fixation frame plate that is fixed on the side surface of the prism;  
       a light valve frame plate that holds the light valve, the light valve frame plate being detachably fixed on the fixation frame plate and the light valve frame plate and the fixation frame plate being fixed to  onto a same side of the prism.  
     
     
       2. The mounting mechanism according to  claim 1 , wherein at least one of the light valve frame plate and the fixation frame plate comprises a peripheral wall covering a periphery of the light valve. 
     
     
       3. The mounting mechanism according to  claim 1 , further comprising an adjusting member that is glued and fixed between the fixation frame plate and the side surface of the prism  light valve frame plate. 
     
     
       4. The mounting mechanism according to  claim 3 , wherein the fixation  light valve frame plate comprises an adjusting member guide portion. 
     
     
       5. The mounting mechanism according to  claim 3 , wherein the adjusting member comprises at least one engagement section utilized when chucking the adjusting member. 
     
     
       6. The mounting mechanism according to  claim 3 , wherein the adjusting member is provided proximate a center of opposite side portion of the light valve frame plate. 
     
     
       7. The mounting mechanism according to  claim 1 , wherein the fixation frame plate and the light valve frame plate comprises an engagement section for chucking the plate. 
     
     
       8. The mounting mechanism according to  claim 1 , wherein the light valve is a liquid crystal panel. 
     
     
       9. A projection type display device of a type  projector which modulates a plurality of color beams through a plurality of light valves, synthesizes the modulated color beams by a prism, and projects a synthesized beam through a projection lens, the projection type display device  projector comprising: 
       a fixation frame plate that is fixed on a side surface of the prism; and  
       a light valve frame plate that holds a  the light valve, the light valve frame plate being detachably fixed on  onto the fixation frame plate and the light valve frame plate and the fixation frame plate being fixed to a same side of the prism.  
     
     
       10. The projection type display device  projector according to  claim 9 , wherein at least one of the light valve frame plate and the fixation frame plate comprises a peripheral wall covering a periphery of the light valve. 
     
     
       11. The projection type display device  projector according to  claim 9 , further comprising an adjusting member that is glued and fixed between the fixation frame plate and the side surface of the prism  light valve frame plate. 
     
     
       12. The projection type display device  projector according to  claim 11 , wherein the fixation  light valve frame plate comprises an adjusting member guide portion. 
     
     
       13. The projection type display device  projector according to  claim 11 , wherein the adjusting member comprises at least one engagement section utilized when chucking the adjusting member. 
     
     
       14. The projection type display device  projector according to  claim 11 , wherein the adjusting member is provided proximate a center of opposite side portion of the light valve frame plate. 
     
     
       15. The projection type display device  projector according to  claim 9 , wherein the fixation frame plate and the light valve frame plate comprises an engagement section for chucking the plate. 
     
     
       16. The projection type display device  projector according to  claim 9 , wherein the light valve is a liquid crystal panel. 
     
     
       17. A mounting mechanism for mounting a light valve on a side surface of a prism comprising: 
       a fixation frame plate that is fixed on the side surface of the prism;  
       a intermediate frame plate that is detachably fixed on the fixation frame;  
       a light valve frame plate that holds the light valve plate, the light valve frame plate and the fixation frame plate being fixed to a same side of the prism; and  
       a positioning mechanism positioned proximate to  member that is glued and fixed between the intermediate frame plate for positioning  and the light valve frame plate.  
     
     
       18. The mounting mechanism according to claim  7   17 , further comprising a temporal fixing mechanism that temporarily fixes the intermediate frame plate and the light valve frame plate. 
     
     
       19. The mounting mechanism according to  claim 18 , wherein the temporal fixing mechanism comprises an engagement protrusion formed on one of the intermediate frame plate and the panel frame plate and an engagement hole formed in the other plate. 
     
     
       20. The mounting mechanism according to  claim 19 , wherein the engagement protrusion inserted into the engagement hole is fixed thereto. 
     
     
       21. The mounting mechanism according to  claim 17 , wherein the positioning mechanism comprises adjusting parts  member for adjusting the position of the light valve. 
     
     
       22. The mounting mechanism according to  claim 21 , wherein the light valve frame plate further comprises an adjusting member guiding mechanism  guide portion. 
     
     
       23. The mounting mechanism according to  claim 21 , wherein the adjusting parts  member comprises at least one engagement section utilized when chucking the adjusting member. 
     
     
       24. The mounting mechanism according to  claim 17 , wherein the positioning mechanism is located proximate a center of opposite side portions of the light valve frame plate. 
     
     
       25. The projection type display device  mounting mechanism according to  claim 17 , wherein the light valve is a liquid crystal panel. 
     
     
       26. A projection type display device of a type  projector which separates a beam from a light source into beams of a plurality of colors, modulates each color beam through a corresponding light valve in accordance with image information, synthesizes the modulated color beams by light synthesizing prism, and projects the synthesized beam onto a projection surface through a projecting mechanism in an enlarged state, the projection type display device  projector comprising: 
       a fixation frame plate fixed to a light incident surface of a  the light synthesizing prism;  
       a light valve frame plate for holding the light valve;  
       a fixing mechanism for  that detachably fixing  fixes the light valve frame plate to the fixation frame plate, the light valve frame plate and the fixation frame plate being fixed to a same side of the prism; and  
       a positioning mechanism positioned proximate to the fixation frame plate for positioning the light valve.  
     
     
       27. A projection type display device of a type  projector which separates a beam from a light source into beams of a plurality of colors, modulates each color beam through a corresponding light valve in accordance with image information, synthesizes the modulated color beams by light synthesizing prism, and projects the synthesized beam onto a projection surface though a projection mechanism in an enlarged state, the projection type display device  projector comprising: 
       a fixation frame plate fixed to a light incident surface of a  the light synthesizing prism;  
       a light valve frame plate for holding the light valve;  
       an intermediate frame plate placed between the fixation frame plate and the light valve frame plate;  
       a fixing mechanism for  that detachably fixing  fixes the light valve frame plate and the intermediate frame plate to the fixation frame plate, the light valve frame plate and the fixation frame plate being fixed to a same side of the prism; and  
       a positioning mechanism positioned proximate to the intermediate frame plate for positioning the light valve.  
     
     
       28. A projector which modulates a plurality of color beams, modulates each color beam through a plurality of light valves, synthesizes the modulated color beams by a prism, and projects a synthesized beam through a projection lens, the projector comprising: 
       a fixation frame plate that is fixed on a side surface of the prism;  
       a light valve frame plate that holds the light valve, the light valve frame plate being detachably fixed onto the fixation frame plate and the light valve frame plate and the fixation frame plate being fixed to a same side of the prism;  
       a power supply;  
       an input/output interface circuit;  
       a video signal processing circuit;  
       a control circuit for driving and controlling the projector; and  
       an outer casing for housing the light valves, the prism, the fixation frame plate, the light valve frame plate, the power supply, the input/output interface circuit, the video signal processing circuit, and the control circuit. 
     
     
       29. The projector according to  claim 28 , wherein at least one of the light valve frame plate and the fixation frame plate comprises a peripheral wall covering a periphery of the light valve. 
     
     
       30. The projector according to  claim 28 , further comprising an adjusting member that is glued and fixed between the fixation frame plate and the light valve frame plate. 
     
     
       31. The projector according to  claim 30 , wherein the light valve frame plate comprises an adjusting member guide portion. 
     
     
       32. The projector according to  claim 30 , wherein the adjusting member comprises at least one engagement section utilized when chucking the adjusting member. 
     
     
       33. The projector according to  claim 30 , wherein the adjusting member is provided proximate a center of opposite side portion of the light valve frame plate. 
     
     
       34. The projector according to  claim 28 , wherein the fixation frame plate and the light valve frame plate comprises an engagement section for chucking the plate. 
     
     
       35. The projector according to  claim 28 , wherein the light valve is a liquid crystal panel. 
     
     
       36. A projector which separates a beam from a light source into a plurality of color beams, modulates each color beam through a corresponding light valve in accordance with image information, synthesizes the modulated color beams by light synthesizing prism, and projects the synthesized beam onto a projection surface through a projecting mechanism in an enlarged state, the projector comprising: 
       a fixation frame plate fixed to a light incident surface of the light synthesizing prism;  
       a light valve frame plate for holding the light valve;  
       a fixing mechanism that detachably fixes the light valve frame plate to the fixation frame plate, the light valve frame plate and the fixation frame plate being fixed to a same side of the prism;  
       a positioning mechanism positioned proximate to the intermediate frame plate for positioning the light valve;  
       a power supply;  
       
         an input/output interface circuit;  
       
       a video signal processing circuit;  
       a control circuit for driving and controlling the projector; and  
       an outer causing for housing the light source, the light valve, the prism, the fixation frame plate, the light valve frame plate, the fixing mechanism the positioning mechanism, the power supply, the input/output interface circuit, the video signal processing circuit, and the control circuit. 
     
     
       37. A projector which separates a beam from a light source into a plurality of color beams, modulates each color beam through a corresponding light valve in accordance with image information, synthesizes the modulated color beams by light synthesizing prism, and projects the synthesized beam onto a projection surface through a projecting mechanism in an enlarged state, the projector comprising: 
       a fixation frame plate fixed to a light incident surface of the light synthesizing prism;  
       a light valve frame plate for holding the light valve;  
       an intermediate frame plate placed between the fixation frame plate and the light valve frame plate;  
       a fixing mechanism that detachably fixes the light valve frame plate to the fixation frame plate, the light valve frame plate and the fixation frame plate being fixed to a same side of the prism;  
       a positioning mechanism positioned proximate to the intermediate frame plate for positioning the light valve;  
       a power supply;  
       an input/output interface circuit;  
       a video signal processing circuit;  
       a control circuit for driving and controlling the projector; and  
       an outer casing for housing the light source, the light valve, the light synthesizing prism, the fixation frame plate, the light valve frame plate, the intermediate frame plate, the fixing mechanism, the positioning mechanism, the power supply, the input/output interface circuit, the video signal processing circuit, and the control circuit.