Rear projection display apparatus and transmission type screen

• US 7,554,729 B2
• Filed: 02/16/2007
• Issued: 06/30/2009
• Est. Priority Date: 03/01/2006
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sumida, Takao, Iwaki, Takaaki
• Primary Examiner(s): MAHONEY, CHRISTOPHER E
• Application Number:
  US11/706,960
• Publication Number:
  US 20070206161A1
• Time in Patent Office: 865 Days
• Field of Search: 359/443, 359/460
• US Class Current: 359/443
• CPC Class Codes: G03B 21/56 Projection screens
• CPC Class Codes: G03B 21/62 Translucent screens
• CPC Class Codes: H04N 5/74 Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A rear projection display apparatus is provided which includes a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof. The transmission type screen includes a lens sheet having respective ribs attached to upper and lower sides thereof, the ribs having increased thickness, and an upper bracket and a lower bracket attached to the lens sheet so as to retainably embrace the respective associated ribs. The upper bracket is fixed to a frame on an apparatus main body side, whereby the lens sheet is installed so as to be pulled downward by the weight of the lower bracket. The rib is formed by laminating the same materials as a substrate of the lens sheet.

Claims

1. A rear projection display apparatus comprising:

an apparatus main body;

a transmission type screen on the front face of the apparatus main body; and

a video projector inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof;

wherein the transmission type screen includes;

a lens sheet having upper and lower sides, a rib attached to the upper side, and a rib attached to the lower side, the ribs having increased thickness, and the ribs comprising laminated sheets, and

an upper bracket and a lower bracket attached to the lens sheet so as to retainably embrace the ribs,

wherein the upper bracket is fixed to a frame on a side of the apparatus main body, whereby the lens sheet is installed so as to be pulled downward by the weight of the lower bracket.

2. The rear projection display apparatus according to claim 1, wherein the ribs are formed by laminating the same materials as a substrate of the lens sheet.

3. The rear projection display apparatus according to claim 1, wherein the transmission type screen includes a lens plate juxtaposed to the lens sheet, the lens plate is retained between the upper bracket and the lower bracket, and the weight of the lens plate together with the weight of the lower bracket is applied to the lens sheet.

4. The rear projection display apparatus according to claim 1, wherein the transmission type screen includes an elastic body which is disposed between the lower bracket and the frame on the apparatus main body side so as to prevent the upward movement of the lens sheet.

5. A transmission type screen for the front face of a rear projection display apparatus main body, comprising:

a lens sheet having upper and lower sides, a rib attached to the upper side, and a rib attached to the lower side, the ribs having increased thickness, and the ribs comprising laminated sheets; and

an upper bracket and a lower bracket attached to the lens sheet so as to retainably embrace the ribs;

wherein the upper bracket is configured to be fixed to a frame on a side of the rear projection display apparatus main body, whereby the lens sheet is configured to be installed so as to be pulled downward by the weight of the lower bracket.

6. The transmission type screen according to claim 5, wherein the ribs are formed by laminating the same materials as a substrate of the lens sheet.

7. The transmission type screen according to claim 5, further comprising;

a lens plate juxtaposed to the lens sheet,

wherein the lens plate is retained between the upper bracket and the lower bracket, and the weight of the lens plate together with the weight of the lower bracket is applied to the lens sheet.

8. The transmission type screen according to claim 5, further comprising:

an elastic body which is disposed between the lower bracket and the frame on the apparatus main body side so as to prevent the upward movement of the lens sheet.