EP0409246A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal projector
Assignee: Sanyo Electric Co Ltd
•
Filing: 1990-07-19
•
Granted: —
•
Expires: 2010-07-19
Abstract
Abstract In a liquid crystal projector having a light source (2) and liquid crystal panel units (5) disposed in the optical paths, reflecting means (3) is disposed on the emanating side of the projector for reflecting the light in a direction approximately perpendicular to the optical axis, and change-over means (4) is coupled to the liquid crystal panel units for reversing the lateral direction of images.
Inventors
- 👤 Keiichi Kanatani
- 👤 Shunichi Kishimoto
- 👤 Yasuo Funazo
- 👤 Takashi Miwa
- 👤 Kazuhiro Kono
- 👤 Goro Hamagishi
- 👤 Kiyoshi Hosoi
- 👤 Shinji Shiogai
- 👤 Koichi Fujiwara
- 👤 Takao Matsumura
- 👤 Shigeru Kobayashi
- 👤 Shinichi Otsuki
- 👤 Kenji Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:08
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; H04N9/3141; H04N9/317
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
A liquid crystal projector having a light source, means for separating the light from the light source into three light components, liquid crystal panel units disposed in the respective optical paths for the three light components separated by the light separating means and each adapted to modulate the light component in accordance with image data, and means for optically composing the three light components as transmitted through the liquid crystal panel units, the projector comprising reflecting means disposed on the emanating side of the optical composing means for reflecting the light composed by the optical composing means in a direction approximately perpendicular to the optical axis, and change-over means coupled to at least one of the liquid crystal panel units for reversing the lateral direction of images.
Claim 2
Dependent Claim
127 words
A liquid crystal projector having a light source, means for separating the light from the light source into three light components, liquid crystal panel units disposed in the respective optical paths for the three light components separated by the light separating means and each adapted to modulate the light component in accordance with image data, and means for optically composing the three light components as transmitted through the liquid crystal panel units, the projector comprising reflecting means disposed on the emanating side of the optical composing means for reflecting the light composed by the optical composing means in a direction approximately perpendicular to the optical axis, and change-over means coupled to at least one of the liquid crystal panel units for reversing the lateral direction of images.
Claim 3
Dependent Claim
22 words
A liquid crystal projector as defined in claim 1 wherein the reflecting means is removable, and the change-over means is on-off controllable.
Claim 4
Dependent Claim
84 words
A liquid crystal projector as defined in claim 1 wherein the light source is insertable inside a generally parabolic reflector through an opening formed in the reflector centrally thereof, and the light source comprises an end member having an outwardly projecting stepped portion and removably attachable to the reflector with the stepped portion in bearing conctact with the opening end of the reflector, and a lamp connected to the end member and having a light-emitting portion positioned at the focal point of the reflector.
Claim 5
Dependent Claim
76 words
A liquid crystal projector as defined in claim 1 wherein each of the liquid crystal panel units comprises a liquid crystal panel, a heat release glass plate adhered to each of opposite surfaces of the liquid crystal panel, a pair of polarizing plates arranged as opposed to each other and each spaced apart from the heat release glass plate by a predetermined angle, and a condenser lens adhered to the polarizing plate on the incident side.
Claim 6
Dependent Claim
64 words
A liquid crystal projector as defined in claim 1 or 4 wherein each of the liquid crystal panel units comprises a liquid crystal panel disposed as inclined at a predetermined angle with a plane perpendicular to the optical axis in accordance with a preference angle of field, and a condenser lens and an incident-side polarizing plate which are arranged perpendicular to the optical axis.
Claim 7
Dependent Claim
23 words
A liquid crystal projector as defined in claim 5 wherein the angle of inclination of the liquid crystal panel is about 3 degrees.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.