Source: http://www.google.com/patents/US8144468?ie=ISO-8859-1
Timestamp: 2014-09-23 06:33:00
Document Index: 454067306

Matched Legal Cases: ['art 125', 'arts 125', 'art 141', 'art 142', 'art 131', 'art 141', 'art 142', 'art 131', 'art 141', 'art 131', 'art 131', 'art 141', 'Application No. 09012215']

Patent US8144468 - Display device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA display device according to the present invention comprises a display panel, an accommodating part accommodating the display panel, circulating means for circulating air in the accommodating part around the display panel, a heat exchanger collecting heat from the air, which is arranged on a rear surface...http://www.google.com/patents/US8144468?utm_source=gb-gplus-sharePatent US8144468 - Display deviceAdvanced Patent SearchPublication numberUS8144468 B2Publication typeGrantApplication numberUS 12/570,404Publication dateMar 27, 2012Filing dateSep 30, 2009Priority dateSep 30, 2008Also published asCN101714316A, CN101714316B, EP2169451A2, EP2169451A3, US20100079949Publication number12570404, 570404, US 8144468 B2, US 8144468B2, US-B2-8144468, US8144468 B2, US8144468B2InventorsMasaya Nakamichi, Shohei TAKAHASHI, Nobuyuki TakeOriginal AssigneeSanyo Electric Co., LtdExport CitationBiBTeX, EndNote, RefManPatent Citations (9), Non-Patent Citations (1), Classifications (10), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetDisplay deviceUS 8144468 B2Abstract A display device according to the present invention comprises a display panel, an accommodating part accommodating the display panel, circulating means for circulating air in the accommodating part around the display panel, a heat exchanger collecting heat from the air, which is arranged on a rear surface side of the display panel, and a heat insulating member provided between the heat exchanger and the display panel. Another display device according to the present invention comprises a display panel, an accommodating part accommodating the display panel, a fan forming an air flow on a display screen of the display panel, a heat exchanger collecting heat from air, which is arranged on a rear surface side of the display panel, and a heat insulating member provided between the heat exchanger and the display panel.
an accommodating part accommodating the display panel;
circulating means for circulating air in the accommodating part around the display panel;
an evaporator collecting heat from the air, which is arranged on a rear surface side of the display panel; and
a heat insulating member provided between the evaporator and the display panel.
a fan forming an air flow on a display screen of the display panel;
a heat insulating member provided between the evaporator and the display panel. Description
The application Number 2008-255681, upon which this patent application is based, is hereby incorporated by reference.
It can be thought to provide cooling means to the liquid crystal display to cool the image display panel, but there is a problem that a part of the liquid crystal display panel adjacent to the cooling means is cooled excessively to deteriorate the function of the image display panel.
SUMMARY OF THE INVENTION A first display device according to the present invention comprises a display panel, an accommodating part accommodating the display panel, circulating means for circulating air in the accommodating part around the display panel, a heat exchanger collecting heat from the air, which is arranged on a rear surface side of the display panel, and a heat insulating member provided between the heat exchanger and the display panel.
A second display device according to the present invention comprises a display panel, an accommodating part accommodating the display panel, a fan forming an air flow on a display screen of the display panel, a heat exchanger collecting heat from air, which is arranged on a rear surface side of the display panel, and a heat insulating member provided between the heat exchanger and the display panel.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an image display system in which a display device is installed;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An image display system in which a display device of a preferred embodiment of the present invention is installed is discussed in detail below with reference to drawings.
The image display device 1 is a device displaying a video on a front surface 101 of the image display system, and includes a liquid crystal display 10 as shown in FIG. 5. More details of the image display device 1 are described in �2. IMAGE DISPLAY DEVICE�.
Here, the backboard 3 is formed of a light transmitting material in order to transmit light emitted from the lighting apparatus 5. Also, the advertising material affixed to the backboard 3 is formed of a light transmitting material in order to transmit the light emitted from the lighting apparatus 5. The advertising material formed of the light transmitting material is hereinafter referred to as an advertising film.
The lighting apparatus 5 is an apparatus for illuminating the advertising film affixed to the front surface 31 of the backboard 3, and comprises a plurality of fluorescent lamps extending in a generally vertical direction. The lighting apparatus 5 is attached to the frame member 21 of the base 2 at a position between the image display device 1 and the backboard 3. Details of arrangement of the lighting apparatus 5 are described in �3. ARRANGEMENT OF LIGHTING APPARATUS�.
The flow path portions 11 a to 11 d are connected to each other in this order circumferentially around the image display panel 11 to surround the image display panel 11. In other words, the upper end parts of the flow path portion 11 a and the flow path portion 11 c communicate with each other via the flow path portion 11 b, and the lower end parts of the flow path portion 11 a and the flow path portion 11 c communicate with each other via the flow path portion 11 d. The air in the circulation flow path 92 is circulated around the image display panel 11 by the circulation fans 18, 181 as to be discussed later. Therefore, the heat generated in a part adjacent to the display screen 112 of the image display panel 11 moves to the rear surface 111 side of the image display panel 11 through the medium of the air in the circulation flow path 92.
The heat released from the heat pipes 13 to the inside of the ventilation paths 122, 123 is released to the outside of the housing 12 through the ventilation paths 122, 123. Therefore, the temperature increase of the image display panel is restrained. As a result, the function of the liquid crystal display 10 is maintained in a preferable state.
In this embodiment, a step is formed on the rear surface 111 of the image display panel 11 as shown in FIGS. 5 and 10 due to a relation between a mounting location of the image display panel 11 and mounting locations of electronic parts and the circuit board 11 e mounted on the image display device 1. Each of the heat pipes 13 is bent in a crank shape in the step part so that the heat pipe 13 follows the shape of the rear surface 111 of the image display panel 11.
Also, the air conditioning machine 19 may comprise a compressor along with the evaporator 191 and the condenser 192. Preferably, the compressor is arranged at a position below the display panel 11, in particular, a position below the accommodation room 121.
In such a structure of the air conditioning machine 19, the air which circulates through the circulation flow path 92 and flowed into the air conditioning machine 19 is cooled by the evaporator 191, while the refrigerant in the evaporator 191 is evaporated by the heat from the air. The evaporated refrigerant is compressed by the compressor to be in a condition of the elevated temperature and pressure, and then flows into the condenser 192. In the condenser 192, the refrigerant of the elevated temperature and pressure is cooled to generate a liquid refrigerant at low temperature. And then, the liquid refrigerant flows into the evaporator 191 again cool the air in the circulation flow path 92.
Therefore, the air is easy to circulate along the circulation flow path 92, and the heat generated in a part adjacent to the display screen 112 of the image display panel can be led to the heat pipes 13 and the evaporator 191 efficiently. As a result, the heat exchange (heat collection) efficiency in the heat pipes 13 and the evaporator 191 increases, thereby increasing the cooling efficiency of the image display device 1.
In a part of the circulation flow path 92 where the circulation flow path 92 is widened, a path resistance decreases. In particular, the circulation flow path 92 is narrow in the flow path portion 11 b and is widened at the entrance to the flow path portion 11 c from the flow path portion 11 b as shown in FIG. 13. Thus, the air in the flow path portion 11 b is easy to be led to the flow path portion 11 c. Therefore, by arranging the circulation fans 18 in the upper end part of the flow path portion 11 c, the air in the flow path portion lib can be led to the flow path portion 11 c efficiently. As a result, the air in the circulation flow path 92 circulates efficiently.
Also, the lighting apparatus 5 for illuminating the advertising film is arranged in the second accommodation space 12 a as shown in FIG. 12. In particular, a plurality of fluorescent lamps forming the lighting apparatus 5 are arranged in line horizontally along the vertical wall part 125 a in the inside of the second accommodation space 12 a. By providing the inclined wall parts 125 b, 125 c on the rear surface wall 125 forming the accommodation room 121 as mentioned earlier, the first accommodation spaces 12 b, 12 c where the circulation fans 18, 181 and the evaporator 191 are arranged are defined inside the accommodation room 121, and the second accommodation space 12 a where the lighting apparatus 5 are arranged is defined outside of the accommodation room 121 at a position generally below the circulation fans 18, and generally above the circulation fans 181 and the evaporator 191. In other words, the second accommodation space 12 a is interposed between the first accommodation spaces 12 b, 12 c in the vertical direction or in the generally vertical direction.
For example, flow path portions may be defined between the side surface of the image display panel 11 and the side surface walls 121 a, 121 b forming the accommodation room 121 respectively, to define the circulation flow path 92 by said flow path portions and the flow path portions 11 a, 11 c. Also, the image display device 1 described above, the circulation fans 18 make the air in the flow path portion 11 a along the display screen 112 flow from bottom to top, however, the circulation fans 18 may make the air flow from top to bottom. In such a case, it is preferable to install the circulation fan 18 in the position adjacent to the lower end surface 114 of the image display panel 11. The position of the circulation fans 18 is not limited to the position adjacent to the upper end surface 113 or the lower end surface 114 of the image display panel 11, and may be another position.
In the image display device 1 described above, the heat releasing fins 14 arranged inside the ventilation path 122 is formed by the first heat releasing part 141 and the second heat releasing part 142, and the projecting part 131 of the heat pipe 13 is sandwiched from both sides by the first heat releasing part 141 and the second heat releasing part 142 with the projecting part 131 fitted in the pair of grooves 141 c, 142 c. However, it is also possible that, for example, each heat: releasing fin 14 is formed only by the first heat releasing part 141, and the heat releasing fin 14 is attached to the projecting part 131 of the heat pipe 13 by fitting the projecting part 131 of the heat pipe 13 in the groove 141 c defined in the first heat releasing part 141.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6504713 *Jan 22, 1998Jan 7, 2003Iv Phoenix Group, Inc.Ultra-rugged, high-performance computer systemUS7561426 *Mar 8, 2006Jul 14, 2009Samsung Sdi Co., Ltd.Display moduleUS20060077636Sep 15, 2005Apr 13, 2006Sung-Gi KimDisplay device usable outdoorsUS20080253080 *May 4, 2007Oct 16, 2008Forcecon Technology Co., Ltd.Panel-type heat sink moduleUS20100066937 *May 28, 2009Mar 18, 2010Hitachi, Ltd.Liquid crystal display unitUS20110058326 *May 7, 2009Mar 10, 2011Venture Dynamics CorporationVideo display systemEP1951020A1Jan 26, 2007Jul 30, 2008ISL media Singapore PTE LTDCasing to install electric or electronic instrumentsJP2005286987A Title not availableWO2007116116A1Apr 11, 2006Oct 18, 2007Symbicon OyElectronic information board* Cited by examinerNon-Patent CitationsReference1Search Report issued on Aug. 24, 2010 in the corresponding to the European Patent Application No. 09012215.1-1228/2169451.Classifications U.S. Classification361/701, 361/695, 361/694International ClassificationH05K7/20Cooperative ClassificationG02F2201/36, G02F2001/133311, H05K7/20972, G02F1/133308European ClassificationH05K7/20Z10, G02F1/1333ELegal EventsDateCodeEventDescriptionSep 30, 2009ASAssignmentOwner name: SANYO ELECTRIC CO., LTD.,JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NAKAMICHI, MASAYA;TAKAHASHI, SHOHEI;TAKE, NOBUYUKI;US-ASSIGNMENT DATABASE UPDATED:20100401;REEL/FRAME:23306/480Effective date: 20090820Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NAKAMICHI, MASAYA;TAKAHASHI, SHOHEI;TAKE, NOBUYUKI;REEL/FRAME:023306/0480Owner name: SANYO ELECTRIC CO., LTD., JAPANRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google