公开(公告)号：BR102012006654A2

公开(公告)日：2013-06-04

申请号：BR102012006654

申请日：2012-03-23

Applicant: DENSO CORP

Inventor： IWAMI ATSUSHI ,  NAKAMURA YOSHIHIRO ,  HANASHI KEN ,  TAKADA KENICHIROU ,  DOI KAORI

IPC: H01T21/02 ,  H01T13/02

公开(公告)号：DE102004028711A1

公开(公告)日：2005-02-24

申请号：DE102004028711

申请日：2004-06-14

Applicant: DENSO CORP

Inventor： MATSUMOTO TOORU ,  TAKADA KENICHIROU

IPC: G02B5/32 ,  G03B21/10 ,  G03B21/62 ,  G03H1/02 ,  H04N5/74 ,  G02B27/18 ,  G03B21/00

公开(公告)号：DE10317938A1

公开(公告)日：2003-12-04

申请号：DE10317938

申请日：2003-04-17

Applicant: DENSO CORP

Inventor： KAWAI NORITATSU ,  TAKADA KENICHIROU

IPC: G03B21/56 ,  G02B5/32 ,  G03H1/02 ,  G03H1/04

Abstract: A method for fabrication of a hologram screen displaying an image by diffracting and scattering image light projected from a slanted direction comprising superposing a first dispersion plate on a photosensitive layer, emitting nondivergent light of the first incident light, from the first dispersion plate side, emitting second incident light from the first dispersion plate side, and causing the rays of divergent light obtained by dispersion and transmission of these through the first dispersion plate to interfere with each other on the photosensitive layer. Due to this, interference fringes are recorded on the photosensitive layer and a hologram screen is fabricated. The incident direction of the first incident light on the photosensitive layer is made to substantially match with the projection direction of the image light relative to the hologram screen. Further, the incident direction of the second incident light on the photosensitive layer is made the approximate front direction.

公开(公告)号：DE10314184A1

公开(公告)日：2003-11-06

申请号：DE10314184

申请日：2003-03-28

Applicant: DENSO CORP

Inventor： TAKADA KENICHIROU

IPC: G03B21/56 ,  G02B5/02 ,  G02B5/32 ,  G03B21/62 ,  G03H1/04

Abstract: A holographic screen for displaying images by diffracting and dispersing an image beam projected by an image projector comprises a main hologram for diffracting and dispersing an incident image beam from one of an upward angle and a downward angle, and a directional dispersion hologram, disposed on an image projector side of the main hologram, for dispersing and transmitting part of the image beam within a predetermined angle range centered on a direction of incidence thereof, and directly transmitting another part of the image beam, thereby providing a holographic screen that can maintain the brightness and improve the color reproducibility of a displayed image.