Patent ID: 6509938
Filing Date: 2003-01-21
Classification: H04N

Abstract:
A liquid crystal display video projector, comprising:(a) a lamp which emits light; (b) a color separating means to separate the light into red light, blue light and green light; (c) a plurality of crystal panels to modulate each color light of the red light, the blue light and the green light, wherein said liquid crystal panels include a first liquid crystal panel to modulate the red light to a first picture element light; a second liquid crystal panel to modulate the blue light to a second picture element light; and a third liquid crystal panel to modulate the green light to a third picture element light; (d) a polarizing plate disposed on at least one of entrance and exit sides of each of said liquid crystal panels; (e) a color synthesizing optical means to synthesize the modulated first picture element light, the second picture element light and the third picture element light into color picture image light; (f) a projecting lens to project the synthesized color picture image light; (g) an optical base which retains said plurality of liquid crystal panels, said polarizing plate, said color synthesizing optical means, and said projecting lens; and (h) a main body case which accommodates said plurality of liquid crystal panels, said polarizing plate, said color separating means, said color synthesizing optical means, said optical base, and said projecting lens, wherein said color synthesizing optical means includes an X prism, a bonding base, and a panel adjusting member; said X prism synthesizes the first picture element light, the second picture element light, and the third picture element light; said bonding base includes an upper bonding base and a lower bonding base, said upper bonding base is disposed above said X prism, and said lower bonding base is disposed under said X prism; said panel adjusting member includes a first panel adjusting member to install said first liquid crystal panel, a second panel adjusting member to install said second liquid crystal panel, and a third panel adjusting member to install said third liquid crystal panel; and said color synthesizing optical means and said projecting lens are integrally retained by said optical base in generally parallel relation with the optical axis of said projecting lens.