Image display

• US 8,320,119 B2
• Filed: 12/30/2009
• Issued: 11/27/2012
• Est. Priority Date: 01/08/2009
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Inventors: Isoshima, Nobuyuki, Miyoshi, Kohei, Ri, Mika, Yamada, Yutaka, Tsutsui, Toshihiro, Tanaka, Teppei, Kubota, Hidenao, Nishinaka, Yuzo
• Primary Examiner(s): Vortman, Anatoly
• Application Number:
  US12/649,398
• Publication Number:
  US 20100172098A1
• Time in Patent Office: 1,063 Days
• Field of Search: 361/679.21, 361/679.22, 361/679.47, 361/690, 361/704, 361/715, 165/80.3, 165/104.33, 165/185, 165/104.34, 313/46, 345/60, 345/905, 348/748, 349/161
• US Class Current: 361/679.47
• CPC Class Codes: H05K 7/20972 Forced ventilation, e.g. on heat dissipaters coupled to components

Abstract

For improving a cooling efficiency of a display panel in a flat-type image display, various substrates and an image display element are disposed within a thin-sized housing thereof, including: a display panel; a chassis supporting the display panel from a rear surface side thereof; a front surface-side cover on a front side of the display panel; a rear surface-side cover on a rear side of the display panel; an image display element connected to the display panel; a display driver substrate connected to the display panel, and on a surface thereof opposite to the chassis are provided circuit parts; a power source substrate, supplying driving power to the display driver substrate and the image display element, and on a surface thereof opposite to the chassis are provided circuit parts thereof; and a first insulator board opposite to the display driver substrates and the power source substrate of the chassis.

Claims

1. A image display, comprising:

a display panel;

a chassis, which supports said display panel from a rear surface side thereof;

a front surface-side cover, which is provided on a front side of said display panel;

a rear surface-side cover, which is provided on a rear side of said display panel and is provided with openings in an upper portion and a lower portion thereof;

an image display element connected at a lower end of said display panel;

display driver substrates, which are connected at left end and right end of said display panel, and on a surface of which opposite to said chassis are provided circuit parts thereof;

a power source substrate, which supplies driving power to said display driver substrates and said image display element, and on a surface of which opposite to said chassis are provided circuit parts thereof;

first heat sinks, which are connected with said image display element;

at least one (1) set of centrifugal fans, blow-off openings of which are provided in a direction towards said substrates, within a space surrounded by said display panel, said front surface-side cover and said rear surface-side cover;

a first insulator board, which is provided at a position opposite to said display driver substrates and said power source substrate of said chassis; and

a second insulator board, which is provided at a position opposite to said display driver substrates and said power source substrate on said rear surface-side cover;

wherein said first insulator board is provided at a position opposite to an installation position of said circuit parts, having at least height equal to or higher than 50% with respect to a distance from said display driver substrates to said chassis, among said circuit parts which are mounted on said display driver substrates.

3. The image display, as described in the claim 1, further comprising:

a member, which is provided between said first insulator board and said chassis, and is higher in thermal conductivity in an in-plane direction thereof, than said chassis.

4. The image display, as described in the claim 1,

wherein a second heat sink includes a plate-like heat sink, which is connected with an element among the circuit parts mounted on said power source substrate.

5. The image display, as described in the claim 4,

wherein a height of the second heat sink in the direction towards said chassis is lower than a height of the circuit parts mounted on said display driver substrates and said power source substrate in the direction towards said chassis.

6. The image display, as described in the claim 4,

wherein the plane portion of the second heat sink is provided nearly in parallel with a surface of said chassis.

2. A image display, comprising:

a display panel;

a chassis, which supports said display panel from a rear surface side thereof;

a front surface-side cover, which is provided on a front side of said display panel;

a rear surface-side cover, which is provided on a rear side of said display panel and is provided with an opening in an upper portion and an opening in a lower portion thereof;

an image display element connected at a lower end of said display panel;

display driver substrates, which are connected at left end and right end of said display panel, and on a surface of which opposite to said chassis are provided circuit parts thereof;

a power source substrate, which supplies driving power to said display driver substrates and said image display element, and on a surface of which opposite to said chassis are provided circuit parts thereof;

first heat sinks, which are connected with said image display element;

at least one (1) set of centrifugal fans, blow-off openings of which are provided in a direction towards said substrates, within a space surrounded by said display panel, said front surface-side cover and said rear surface-side cover;

a first insulator board, which is provided at a position opposite to said display driver substrates and said power source substrate of said chassis; and

a second insulator board, which is provided at a position opposite to said display driver substrates and said power source substrate on said rear surface-side cover;

wherein said opening in the lower portion is provided at a position opposite to said first heat sinks;

wherein an upper side position of said opening in the lower portion is lower than said centrifugal fan, and is also higher than an upper side portion of said first heat sink, but within 5 mm; and

wherein a lower side position of said opening in the lower portion is at a position lower than a middle position of said first heat sinks.