Projection type image display device maintaining resolution of an image unaffected by parallax

A projection type image display device comprising:

• an optical writing type liquid crystal light valve which forms an image from light applied thereto;
• a matrix type liquid crystal display panel which forms a light pattern to be written to said light valve;
• lighting means for applying light to said matrix type liquid crystal display panel;
• and
• erected image forming means located between said matrix type liquid crystal display panel and said liquid crystal light valve, for forming an erected image on said liquid crystal light valve having a size identical to a size of said light pattern formed on said liquid crystal display panel,
• both a light acceptance angle .theta. (half angle) of said erected image forming means and a degree of parallelization .alpha. (half angle) of the light output from said lighting means being not less than
• tan.sup.-1 {P/(3.sup.1/2 .multidot.L)}
• and at least one of said light acceptance angle .theta. (half angle) and said degree of parallelization .alpha. (half angle) being not greater than 20.degree., wherein P is a pitch of said erected image forming means and L denotes a distance between the light-incident end of said erected image forming means and the pixel of said matrix type liquid crystal display panel.

A method of forming an image having a resolution unaffected by parallax, comprising the steps of:

• forming a light pattern to be written to a liquid crystal light valve on a matrix liquid crystal display panel;
• providing a plurality of lenses each corresponding to a plurality of pixels of said matrix liquid crystal display panel;
• and
• forming an erected image of said light pattern the same size as said light pattern on said light valve through said plurality of lenses.