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    ENHANCED OFF-AXIS VIEWING PERFORMANCE AND LUMINOUS EFFICIENCY OF A LIQUID CRYSTAL DISPLAY EMPLOYING FIBEROPTIC FACEPLATE ELEMENTS
    1.
    发明专利
    ENHANCED OFF-AXIS VIEWING PERFORMANCE AND LUMINOUS EFFICIENCY OF A LIQUID CRYSTAL DISPLAY EMPLOYING FIBEROPTIC FACEPLATE ELEMENTS 未知

    公开(公告)号：CA2138072C

    公开(公告)日：1999-03-16

    申请号：CA2138072

    申请日：1994-12-14

    Applicant: XEROX CORP

    Inventor： SILVERSTEIN LOUIS D ,  BRUCE RICHARD ,  SPRAGUE ROBERT A ,  FISKE THOMAS G

    IPC: G02B6/00 ,  G02B6/08 ,  G02F1/1335 ,  G02F1/13357

    Abstract: A transmissive, backlit color twisted-nematic or super-twisted-nematic liquid crystal display employing a front fiber-optic facep late as a front retaining element of a liquid crystal cell that increases viewing angle between the display and a viewer while minimizing or eliminating undesirable variations in luminance, contrast ratio and chromaticity is described. This novel configuration effectively decouples the liquid crystal cell and other optical elements behind the front fiber optic faceplate from the angular orientation of the viewer with respect to the display. The liquid crystal display described in this invention further provides a high quality color display, without viewing parallax, using a color selection filter mosaic outside of the liquid crystal cell. The display also increases luminous efficiency and improves color saturation by concentrating the transmission of available backlight illumination through the use of a rear fiber-optic faceplate and a second rear-mounted mosaic of color interference filters.

    2.
    发明专利
    未知

    公开(公告)号：DE69815560D1

    公开(公告)日：2003-07-24

    申请号：DE69815560

    申请日：1998-01-23

    Applicant: XEROX CORP

    Inventor： CRAWFORD GREG P ,  FISKE THOMAS G ,  SILVERSTEIN LOUIS D

    IPC: G02F1/1333 ,  G02F1/1334 ,  G02F1/1347 ,  G03H1/22 ,  G09F9/35

    Abstract: A paper-white reflective display (47) that has improved photopic white reflectance, a high contrast, a lack of haze or opaqueness when viewed from various viewing angles and lower drive voltages is described. The paper-white reflective display (47) includes first and second substrates (48, 50), a plurality of groups of liquid crystal and polymer layers (52, 54, 56) located between the first and second substrates (48, 50), each group of liquid crystal and polymer layers being reflective of different wavelengths of light, and a voltage source (58) connected between the first and second substrates (48, 50) that selectively applies a voltage to all of the liquid crystal and polymer layers (52, 54, 56).

    LIQUID CRYSTAL DISPLAY EMPLOYING DUAL NEGATIVE RETARDERS AND A BRIGHTNESS ENHANCING FILM
    3.
    发明专利
    LIQUID CRYSTAL DISPLAY EMPLOYING DUAL NEGATIVE RETARDERS AND A BRIGHTNESS ENHANCING FILM 未知

    公开(公告)号：CA2222313A1

    公开(公告)日：1998-06-12

    申请号：CA2222313

    申请日：1997-11-26

    Applicant: XEROX CORP

    Inventor： FISKE THOMAS G ,  CRAWFORD GREGORY P ,  SILVERSTEIN LOUIS D

    IPC: G02B6/00 ,  F21V8/00 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/13363 ,  G09F9/35

    Abstract: A transmissive, backlit color twisted-nematic or super-twisted-nematic liquid crystal display employing a front fiber-optic faceplate or optical equivalent as a front retaining element of a liquid crystal cell that increases viewing angle between the display and a viewer while minimizing or eliminating undesirable variations in luminance, contrast ratio and chromaticity is described. The fiber-optic faceplate or optical equivalent includes cylindrical optical features and interstitial cladding material of greater optical index than the cylindrical optical features. The interstitial cladding material may include an opaque mask blocking layer to prevent the interstitial apertures from diffracting off-axis light into an observer's viewing cone. In particular the liquid crystal display includes dual negative retarders, and a light shaping element such as a brightness enhancing film on the illumination source that increase the effective viewing angle between the display and a viewer while minimizing undesirable variations in display chromaticity, luminance, and contrast ratio. The front fiber-optic faceplate or optical equivalent works in conjunction with the dual negative retarders and the light shaping element to provide an improved contrast ratio with a perfectly symmetric viewing angle and to eliminate grey scale inversions.

    5.
    发明专利
    未知

    公开(公告)号：DE69834447T2

    公开(公告)日：2006-11-02

    申请号：DE69834447

    申请日：1998-01-27

    Applicant: XEROX CORP

    Inventor： SILVERSTEIN LOUIS D ,  FISKE THOMAS G ,  CRAWFORD GREG P

    IPC: G02F1/1333 ,  G02F1/1334 ,  G02F1/1347 ,  G02F1/137 ,  G03H1/02 ,  G03H1/22 ,  G09F9/35 ,  H04N9/31

    Abstract: A holographically formed reflective display includes first and second substrates (10), a liquid crystal material (16) located between the first and second substrates and a plurality of anisotropic polymer sheets (20) separating the liquid crystal material into a plurality of liquid crystal material regions. The anisotropic polymer sheets (20) reduce haze in the display and operates in the reverse mode when viewed from various viewing angles. The holographically formed reflective display may be used to form a color liquid crystal display and a color projection system.

    8.
    发明专利
    未知

    公开(公告)号：DE69834447D1

    公开(公告)日：2006-06-14

    申请号：DE69834447

    申请日：1998-01-27

    Applicant: XEROX CORP

    Inventor： SILVERSTEIN LOUIS D ,  FISKE THOMAS G ,  CRAWFORD GREG P

    IPC: G02F1/1333 ,  G02F1/1334 ,  G02F1/1347 ,  G02F1/137 ,  G03H1/02 ,  G03H1/22 ,  G09F9/35 ,  H04N9/31

    Abstract: A holographically formed reflective display includes first and second substrates (10), a liquid crystal material (16) located between the first and second substrates and a plurality of anisotropic polymer sheets (20) separating the liquid crystal material into a plurality of liquid crystal material regions. The anisotropic polymer sheets (20) reduce haze in the display and operates in the reverse mode when viewed from various viewing angles. The holographically formed reflective display may be used to form a color liquid crystal display and a color projection system.

    9.
    发明专利
    未知

    公开(公告)号：DE69815560T2

    公开(公告)日：2003-12-11

    申请号：DE69815560

    申请日：1998-01-23

    Applicant: XEROX CORP

    Inventor： CRAWFORD GREG P ,  FISKE THOMAS G ,  SILVERSTEIN LOUIS D

    IPC: G02F1/1333 ,  G02F1/1334 ,  G02F1/1347 ,  G03H1/22 ,  G09F9/35

    Abstract: A paper-white reflective display (47) that has improved photopic white reflectance, a high contrast, a lack of haze or opaqueness when viewed from various viewing angles and lower drive voltages is described. The paper-white reflective display (47) includes first and second substrates (48, 50), a plurality of groups of liquid crystal and polymer layers (52, 54, 56) located between the first and second substrates (48, 50), each group of liquid crystal and polymer layers being reflective of different wavelengths of light, and a voltage source (58) connected between the first and second substrates (48, 50) that selectively applies a voltage to all of the liquid crystal and polymer layers (52, 54, 56).

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