Title:
PROJECTION TYPE DISPLAY DEVICE AND MULTI SCREEN DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP3896248
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To lower heat resistant temperature of a luminous flux controlling means which lowers irregularities of brightness and color which are caused by the eclipse at the lens edge of projection lens and to reduce the lowering of contrast due to stray light.
SOLUTION: This projection type display device is provided with a light source, a liquid crystal panel, an integrator which uniformly illuminates the liquid crystal panel comprising a first lens array and a second lens array, a projection lens which enlarges and projects a light modulation picture from the liquid crystal panel on a screen and the luminous flux controlling means which controls the luminous flux which is made incident to the integrator from the light source in between the light source and integrator. Therein, the incident luminous flux from the peripheral part of a reflection mirror of the light source among the incident luminous flux from the light source to the integrator is shielded by a luminous flux controlling means.
Inventors:
Takashi Kamihara
Keiichiro Tanaka
Shuichi Sakamoto
Sea Oihara Masayuki
Mitsuya Nakao
Koshu Ichikawa
Kazuo Kobayashi
Tadashi Sato
Keiichiro Tanaka
Shuichi Sakamoto
Sea Oihara Masayuki
Mitsuya Nakao
Koshu Ichikawa
Kazuo Kobayashi
Tadashi Sato
Application Number:
JP2000396906A
Publication Date:
March 22, 2007
Filing Date:
December 25, 2000
Export Citation:
Assignee:
株式会社日立製作所
株式会社日立アドバンストデジタル
株式会社日立アドバンストデジタル
International Classes:
G02F1/13; G02B27/00; G02F1/13357; G03B21/00; H04N5/74; (IPC1-7): G02F1/13; G02B27/00; G02F1/13357; G03B21/00; H04N5/74
Domestic Patent References:
| JP11281923A | ||||
| JP9325313A | ||||
| JP8286164A | ||||
| JP7270719A | ||||
| JP5019346A | ||||
| JP2002189192A | ||||
| JP2001228569A | ||||
| JP4053926A | ||||
| JP2000338448A |
Attorney, Agent or Firm:
Manabu Inoue