High efficiency color liquid crystal display

A liquid crystal display having light source means and liquid crystal panel means, comprising:

• means for emitting rays having wavelengths corresponding to the primary colors in respective three directions;
• lens group means provided on the light incident side of said liquid crystal panel means;
• and
• lens group means provided on the light emitting side of said liquid crystal panel means;
• wherein angles of propagation directions of emitted rays of the primary colors are made different from one another by said primary-colors three direction emitting means, the rays of the primary colors are introduced into respective picture elements corresponding to the primary colors by said panel-light incident side lens group means, and the propagation directions of the emitted rays of the primary colors are made to substantially coincide with one another by said panel-light emitting side lens group means;
• wherein said panel-light emitting side lens group means is constituted by double-lenticular lens means which is separately arranged on the light emitting side of said liquid crystal panel means;
• and
• wherein each of focal lengths of light incident side lenticular lens and light emitting side lenticular lens constituting said double-lenticular lens means is set 0.5 to 1.5 times as large as a thickness thereof.

A liquid crystal display including light source means and liquid crystal panel means, the liquid crystal panel means including picture elements corresponding to three primary colors, the picture elements being grouped into a plurality of sets of three picture elements, the three picture elements in each of the sets of three picture elements respectively corresponding to the three primary colors, the liquid crystal display comprising:

• three-direction means for receiving light from the light source means, and emitting rays of the three primary colors having three respective mutually different propagation directions;
• first lens group means, disposed before the picture elements of the liquid crystal panel means, for receiving the rays of the three primary colors from the three-direction means, and directing rays of the three primary colors into respective ones of the picture elements corresponding to the three primary colors of the liquid crystal panel means, the first lens group means including a plurality of first lens elements equal in number to the sets of three picture elements, each of the lens elements corresponding to a respective one of the sets of three picture elements;
• and
• second lens group means, disposed after the first lens group means and having a focal plane disposed at a position of the first lens group means, for receiving rays of the three primary colors having three respective mutually different propagation directions from one of (1) the first lens group means and (2) the picture elements of the liquid crystal panel means, and emitting rays of the three primary colors having three respective propagation directions substantially coinciding with one another, the second lens group means including a plurality of second lens elements equal in number to the sets of three picture elements, each of the second lens elements corresponding to a respective one of the sets of three picture elements.

A liquid crystal display including light source means and liquid crystal panel means, the liquid crystal panel means including picture elements corresponding to three primary colors, the liquid crystal display comprising:

• three-direction means for receiving light from the light source means, and emitting rays of the three primary colors having three respective mutually different propagation directions;
• first lens group means, disposed before the picture elements of the liquid crystal panel means, for receiving the rays of the three primary colors from the three-direction means, and directing rays of the three primary colors into respective ones of the picture elements corresponding to the three primary colors of the liquid crystal panel means;
• and
• second lens group means, disposed after the first lens group means, for receiving rays of the three primary colors having three respective mutually different propagation directions from the picture elements of the liquid crystal panel means, and emitting rays of the three primary colors having three respective propagation directions substantially coinciding with one another, the second lens group means including double-lenticular lens means disposed after a light emitting side of the liquid crystal panel means, the double-lenticular lens means including
• a first lenticular lens constituting a light incident side of the double-lenticular lens means and having a focal length about 0.5 to 1.5 times as large as a thickness of the double-lenticular lens means, and
• a second lenticular lens constituting a light emitting surface of the double-lenticular lens means and having a focal plane disposed at a position of the first lenticular lens.