Title:
BACK DISPLAY DEVICE FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JP3768542
Kind Code:
B2
Abstract:
PURPOSE: To provide a back display device for automobile, which can perform the excellent back display, by making a sufficient quantity of regenerated light enter a rear window glass or a light guide plate, to which a hologram is fitted, efficiently.
CONSTITUTION: The light radiated from a light source 5 enters a deformed prism 4, and at the time when the light is made to go out from one surface of this prism 4 into the air once, the flattening work is applied to a light flux to make it flat. This flat light enters a part of the prism 4 again, and enters a light guide plate 2, and the light, which is reflected and transmitted inside of the light guide plate 2, is applied as the regenerated light to a hologram 3 fitted to the light guide plate 2. The hologram 3 reflects the only light having a predetermined incidence and a predetermined wavelength (for example, red) to the nearly horizontal direction to display the stop display or the like backward of an automobile.
Inventors:
Kazutoshi Koie
Naoki Fukaya
Shinji Namba
Yasunari Kanno
Naoki Fukaya
Shinji Namba
Yasunari Kanno
Application Number:
JP32211692A
Publication Date:
April 19, 2006
Filing Date:
December 01, 1992
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B60Q1/44; B60Q1/30; B60Q1/50; F21S8/10; G02B5/32; (IPC1-7): B60Q1/44; B60Q1/50; G02B5/32
Domestic Patent References:
| JP3121943A | ||||
| JP57146286A | ||||
| JP3297003A | ||||
| JP3203046A | ||||
| JP2241841A |
Attorney, Agent or Firm:
Hirohiko Usui
Daito Kato
Takashi Ito
Daito Kato
Takashi Ito