Projection-type liquid crystal display apparatus

Claim 2

A projection-type liquid crystal display apparatus comprising: means for separating a light emitted from a light source into first and second linearly polarized light components perpendicular to each other; a first liquid crystal cell, including a plurality of pixels, for transmitting light of the first linearly polarized light component incident upon a pixel containing a first type of display data from a first and second type of display data indicating light to be transmitted and nontransmitted, respectively, and for converting light of the first linearly polarized light component incident upon pixels containing a pixel corresponding to said second type of display data into light of the second linearly polarized light component; a second liquid crystal cell, including a plurality of pixels each containing a pixel corresponding to the first or second type of display data, for transmitting light of the second linearly polarized light component incident upon a pixel containing the first type of display data and for converting light of the second linearly polarized light component incident upon a pixel containing said second type of display data into light of the first linearly polarized light component; means for composing the first and second linearly polarized light components transmitted through each pixel to produce an image superposed from image data generated by said first and second liquid crystal cells; and optical means for projecting the composed light onto a screen.

Claim 3

The projection-type liquid crystal display apparatus according to claim 1, wherein said first and second liquid crystal cells are twisted-nematic liquid crystal cells.

Claim 4

The projection-type liquid crystal display apparatus according to claim 1, wherein said first and second liquid crystal cells include color filters.

Claim 5

The projection-type liquid crystal display apparatus according to claim 3, wherein said first and second liquid crystal cells respectively include three liquid crystals cells, each of which corresponds to one incident primary color light of the respective first and second linearly polarized light components, separated into three primary colors.

Claim 6

The projection-type liquid crystal display apparatus according to claim 4, wherein the first and second linearly polarized light components are separated into the three primary colors through dichroic mirrors.

Claim 7

The projection-type liquid crystal display apparatus according to claim 1, wherein said first and second liquid crystal cells are connected to means to give the transmitted light a variable tone.

Claim 8

The projection-type liquid crystal display apparatus according to claim 1, wherein said polarized light composing means is a polarizing light beam splitter which composes the first linearly polarized light component transmitted through said first liquid crystal cell and said second linearly polarized light component transmitted through the second liquid crystal cell.

Claim 9

The projection-type liquid crystal display apparatus according to claim 1, wherein said polarized light composing means is a polarizing light beam splitter which composes the second linearly polarized light component transmitted through said first liquid crystal cell and the first linearly polarized light component transmitted through said second liquid crystal cell.

Claim 10

The projection-type liquid crystal display apparatus according to claim 7 or 8, wherein said polarizing light beam splitter is of plate type.

Claim 11

The projection-type liquid crystal display apparatus according to claim 7 or 8, wherein said polarizing light beam splitter is of cube type.

Claim 12

The projection-type liquid crystal display apparatus according to claim 1, wherein said optical means is a projection lens.

Claim 13

The projection-type liquid crystal display apparatus according to claim 1, wherein said screen is of non-transparent type.

Claim 14

The projection-type liquid crystal display apparatus according to claim 1, wherein said screen is of transparent type.

Claim 15

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means, formed of plural pixels, for receiving said separated light of said first linearly polarized light component and for transmitting an input image on said separated light of said first linearly polarized light component by applying a voltage to each pixel to produce a converted second linearly polarized light component; second image forming means, formed of a plurality of pixels, for receiving said separated light of said second linearly polarized light component and for transmitting an input image on said separated light of said second linearly polarized light component by applying the voltage to each pixel to produce a converted first linearly polarized light component; and combining means for combining said transmitted light of said converted first and second linearly polarized light components for projection of the input image to a display medium.

Claim 16

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means, formed of plural pixels, for receiving said separated light of said first linearly polarized light component and for transmitting an input image on said separated light of said first linearly polarized light component by applying a voltage to each pixel to produce a converted second linearly polarized light component; second image forming means, formed of a plurality of pixels, for receiving said separated light of said second linearly polarized light component and for transmitting an input image on said separated light of said second linearly polarized light component by applying the voltage to each pixel to produce a converted first linearly polarized light component; and combining means for combining said transmitted light of said converted first and second linearly polarized light components for projection of the input image to a display medium.

Claim 17

The projection display apparatus of claim 14, further comprising: optical projection means for projecting said combined transmitted light of said converted first and second linearly polarized light components, to said display medium.

Claim 18

The projection display apparatus of claim 14, wherein said first and second image forming means are liquid crystal display cells, each including the plurality of pixels formed in a matrix.

Claim 19

The projection display apparatus of claim 16 wherein voltage is applied to pixels of said first and second liquid crystal display cells to form the input image on said first and second liquid crystal display cells, to be transmitted on said separated light of said first and second linearly polarized light components, respectively.

Claim 20

The projection display apparatus of claim 17, wherein said light of said first and second linearly polarized light components is transmitted through pixels corresponding to said input image, of said first and second liquid crystal display cells, respectively, and light of said first and second linearly polarized light components is converted to light of said second and first linearly polarized light components, respectively, through pixels not corresponding to said input image.

Claim 21

The projection display apparatus of claim 14, further comprising: a plurality of light color separating means for separating said light of said first and second linearly polarized light components into light of red (r), green (g) and blue (b) color components, wherein said first and second image forming means includes a plurality of subimage forming means, one corresponding to each of said r, g, b light color components, each for receiving one of said r, g, b light color components of said first and second linearly polarized light components, respectively, and for transmitting a color component of said input image on respective ones of said first and second linearly polarized light components, and wherein said combining means includes a plurality of subcombining means, each for combining said r, g, b light color components into transmitted light of one of said first and second linearly polarized light components, to be combined for projection of said input image to a display medium.

Claim 24

The method of display as claimed in claim 20, further comprising the step of: h) projecting the combined, transmitted light of the first and second light components, to the display medium.

Claim 25

The method of display as claimed in claim 20, wherein step (b) comprises the substeps of: (1) separating the light of the first linearly polarized light component into each of a red (r), blue (b), and green (g) color component, and (2) separating the light of the second linearly polarized light component into each of a red (r), blue (b), and green (g) color component, step (c) comprises the substeps of, (1) forming a red input subimage on a first subimage forming device, (2) forming a blue input subimage on a second subimage forming device, and (3) forming a green input subimage on a third subimage forming device, step (e) comprises the substeps of, (1) forming a red input subimage on a fourth subimage forming device, (2) forming a blue input subimage on a fifth subimage forming device, and (3) forming a green input subimage on a sixth subimage forming device, step (d) comprises the substeps of, (1) transmitting the separated red light of the first linearly polarized light component through the first subimage forming device and forming the red input subimage on the separated red light of the first linearly polarized light component, (2) transmitting the separated blue light of the first linearly polarized light component through the second subimage forming device and forming the blue input subimage on the separated blue light of the first linearly polarized light component, and (3) transmitting the separated green light of the first linearly polarized light component through the third subimage forming device and forming the green input subimage on the separated green light of the first linearly polarized light component, step (f) comprises the substeps of (1) transmitting the separated red light of the second linearly polarized light component through the fourth subimage forming device and forming the red input subimage on the separated red light of the second linearly polarized light component, (2) transmitting the separated blue light of the second linearly polarized light component through the fifth subimage forming device and forming the blue input subimage on the separated blue light of the second linearly polarized light component, and (3) transmitting the separated green light of the second linearly polarized light component through the sixth subimage forming device and forming the green input subimage on the separated green light of the second linearly polarized light component, and step (g) includes the substeps of (1) combining the red, green, and blue subimages on the separated red, green and blue light of the first linearly polarized light component, (2) combining the red, green, and blue subimages on the separated red, green, and blue light of the second linearly polarized light component, and (3) combining the combined transmitted light of the first and second linearly polarized light components, for projection of the input image to a display medium.

Claim 26

The method of display of claim 22, further comprising the step of: (h) projecting the combined transmitted light of the first and second linearly polarized light components, to the display medium.

Claim 27

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means, including first color filter means formed on an incident face thereof, for receiving said separated light of said first linearly polarized light component and for transmitting a colored input image on said separated light of said first linearly polarized light component; second image forming means, including second color filter means formed on an incident face thereof, for receiving said separated light of said second linearly polarized light component and for transmitting a colored input image on said separated light of said second linearly polarized light component; and combining means for combining said transmitted light of said first and second linearly polarized light components for projection of the colored input image to a display medium.

Claim 28

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means, including first color filter means formed on an incident face thereof, for receiving said separated light of said first linearly polarized light component and for transmitting a colored input image on said separated light of said first linearly polarized light component; second image forming means, including second color filter means formed on an incident face thereof, for receiving said separated light of said second linearly polarized light component and for transmitting a colored input image on said separated light of said second linearly polarized light component; and combining means for combining said transmitted light of said first and second linearly polarized light components for projection of the colored input image to a display medium.

Claim 29

The projection display apparatus of claim 24, further comprising: optical projection means for projecting said combined, transmitted light of the first and second linearly polarized light components, to said display medium.

Claim 30

The projection display apparatus of claim 24, wherein said first and second image forming means are liquid crystal display cells, each including a plurality of pixels formed in a matrix.

Claim 31

The projection display apparatus of claim 26, wherein voltage is applied to pixels of said first and second liquid crystal display cells to form an input image corresponding to the colored input image, on the first and second liquid crystal display cells, to be transmitted on said separated light of said first and second linearly polarized light components, respectively.

Claim 32

The projection display apparatus of claim 24, further comprising first and second convex lenses, disposed between said light separating means and said first and second color filter means, for respectively condensing said first and second linearly polarized light components onto said first and second color filter means.

Claim 33

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means for receiving said separated light of said first linearly polarized light component and for transmitting a colored input image on said separated light of said first linearly polarized light component; second image forming means for receiving said separated light of said second linearly polarized light component and for transmitting a colored input image on said separated light of said second linearly polarized light component; and combining means for combining said transmitted light of said first and second linearly polarized light components for projection of the colored input image to a display medium, said first and second image forming means each including a plurality of light color separating means for separating said light of said first and second linearly polarized light components into light of red (r), green (g) and blue (b) components, a plurality of sub-image forming means, one corresponding to each of said r, g, b light color components, each for receiving one of said r, g, b light color components of said first and second linearly polarized light components, respectively, and for transmitting a color component of said input image on respective ones of said first and second linearly polarized light components, and sub-combining means for combining said r, g, b color components into transmitted light of one of said first and second linearly polarized light components, respectively.

Claim 34

A projection display apparatus, comprising: a light source for producing light; light separating means for separating said produced light into light of a first linearly polarized light component and light of a second linearly polarized light component, perpendicular to said first linearly polarized light component; first image forming means for receiving said separated light of said first linearly polarized light component and for transmitting a colored input image on said separated light of said first linearly polarized light component; second image forming means for receiving said separated light of said second linearly polarized light component and for transmitting a colored input image on said separated light of said second linearly polarized light component; and combining means for combining said transmitted light of said first and second linearly polarized light components for projection of the colored input image to a display medium, said first and second image forming means each including a plurality of light color separating means for separating said light of said first and second linearly polarized light components into light of red (r), green (g) and blue (b) components, a plurality of sub-image forming means, one corresponding to each of said r, g, b light color components, each for receiving one of said r, g, b light color components of said first and second linearly polarized light components, respectively, and for transmitting a color component of said input image on respective ones of said first and second linearly polarized light components, and sub-combining means for combining said r, g, b color components into transmitted light of one of said first and second linearly polarized light components, respectively.