IP Library Granted Patent US 8,641,202
Granted Patent B2
US 8,641,202 · App. 12/551,833 · Granted Feb 4, 2014

Projection display device

Inventors: Hisashi Okada (Daito, JP); Kazuya Minami (Hirakata, JP); Yosuke Nishihata (Osaka, JP); Yuji Matsuyama (Daito, JP)
Assignee: SANYO Electric Co., Ltd.
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,641,202
App. No.
12/551,833
Granted
Feb 4, 2014
Kind
B2
Abstract

A projection display device includes: a light modulator for modulating light from a light source; a polarizer disposed at a position facing the light modulator; a cooling section for allowing an air to flow in a space between the light modulator and the polarizer; and an air deflector for deflecting the air flowing in the space between the light modulator and the polarizer toward the polarizer.

Claims (8)

1. A projection display device, comprising:

a light modulator for modulating light from a light source, the light modulator includes a liquid crystal panel, and a frame surrounding a perimeter of the liquid crystal panel, wherein the liquid crystal panel is recessed with respect to the frame,

a polarizer disposed at a position facing the light modulator;

a cooling section for allowing an air to flow in a space between the light modulator and the polarizer; and

an air deflector for deflecting the air flowing in the space between the light modulator and the polarizer toward the polarizer wherein the air deflector has an inclined portion deflecting air toward the polarizer, and wherein the inclined portion has a trailing edge which is not in contact with the frame, with respect to the direction of air flow, spaced apart from a transition between the frame and the liquid crystal panel, before the transition in the air flow direction, and wherein a transverse width of the inclined portion is set longer than a transverse width of the liquid crystal panel,

wherein the air deflector includes a bracket for supporting the light modulator, the bracket being mounted on a surface of the light modulator at a position facing the polarizer, the inclined portion is formed on the bracket, and a leading edge of the inclined portion is in contact with the frame.

2. The projection display device according to claim 1 , wherein the transition is a step portion defined between the liquid crystal panel and the frame.

3. The projection display device according to claim 1 , wherein the air deflector is operable to deflect the air toward a middle portion of the polarizer.

Assignments (4)
CHANGE OF ADDRESS Recorded Feb 24, 2026
From: SANYO ELECTRIC CO., LTD.
To: SANYO ELECTRIC CO., LTD.
Reel/Frame 074982/0479 →
CHANGE OF ADDRESS Recorded Feb 24, 2026
From: SANYO ELECTRIC CO., LTD.
To: SANYO ELECTRIC CO., LTD.
Reel/Frame 074983/0494 →
NUNC PRO TUNC ASSIGNMENT Recorded Feb 24, 2026
From: SANYO ELECTRIC CO., LTD.
To: PANASONIC PROJECTOR & DISPLAY CORPORATION
Reel/Frame 074983/0875 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 2, 2009
From: OKADA, HISASHI; MINAMI, KAZUYA; NISHIHATA, YOSUKE; MATSUYAMA, YUJI
To: SANYO ELECTRIC CO., LTD.,
Reel/Frame 023182/0127 →
Priority Claims (1)
JP 2008-225997 · Sep 3, 2008 · national
Continuity (1)
Related Publication 20100053568A1 · Mar 4, 2010