News Column

Patent Application Titled "Organic Light Emitting Diode Display" Published Online

May 7, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventor BANG, Jin-Young (Gumi-si, KR), filed on August 2, 2013, was made available online on April 24, 2014.

The assignee for this patent application is Lg Display Co., Ltd.

Reporters obtained the following quote from the background information supplied by the inventors: "The present disclosure relates to an organic light emitting diode display.

"With the advancement of information society, demand for a display device capable of displaying an image has increased in various forms. Recently, various flat panel display devices, such as a liquid crystal display (LCD), a plasma display panel (PDP), and an organic light emitting diode (OLED) display, have been used.

"An OLED display has been widely used because of advantages of small size, lightweight, thin profile, low power consumption and the like.

"An active matrix type OLED display is generally used which has pixels arranged in a matrix form where each pixel includes a switching transistor.

"The related art OLED display includes a display panel, a driving circuit board, and a back cover therebetween.

"The display panel acts as a heat source, and thus a temperature of the display panel rises with the display operation thereof. Further, the driving circuit board acts as a heat source as well. In particular, a control board, on which a plurality of circuit components, are mounted radiates much heat.

"The heat from the control board is transferred to the display panel located in front, and a temperature of a portion of the display panel in front of the control board rises higher than other portions of the display panel. Therefore, the portion of the display panel in front of the control board is damaged or degraded very fast, and hot spot is thus caused there which deteriorates the performance of the display panel."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventor's summary information for this patent application: "Accordingly, the present invention is directed to an OLED display capable of effectively radiating heat produced by a driving circuit.

"The present invention is further directed to an OLED display having specific structures which address the limitations and disadvantages associated with the related art.

"Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

"To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, an organic light emitting diode (OLED) display according to an embodiment includes an organic light emitting diode panel; a back cover attached to the organic light emitting diode panel by an adhesive; a driving circuit board on a rear surface of the back cover; and a heat radiator which covers the driving circuit board, and around which the adhesive is located in plane view.

"In another aspect, an organic light emitting diode (OLED) display includes an organic light emitting diode panel; a back cover on a rear surface of the organic light emitting diode panel; a driving circuit board on a rear surface of the back cover; and a metal plate or a heat radiation plate on a rear surface of the back cover and on which the driving circuit board is placed, wherein at least one of the back cover and the heat radiation plate includes a first heat spread unit and a heat insulation unit sequentially located in a direction to the organic light emitting diode.

"It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

"The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

"FIG. 1 is a schematic cross-sectional view illustrating an OLED display according to a first embodiment of the present invention;

"FIG. 2 is a schematic circuit diagram of a pixel of a display panel of the OLED display according to the first embodiment of the present invention;

"FIG. 3 is a schematic plan view illustrating a heat radiator and an adhesive according to the first embodiment of the present invention;

"FIG. 4 is a schematic cross-sectional view illustrating the heat radiator according to the first embodiment of the present invention;

"FIG. 5 is a schematic view illustrating a heat transfer path of a heat produced by a control board according to the first embodiment of the present invention;

"FIG. 6 is a view showing examples of measured temperatures of organic light emitting diode panels of the related art, a comparative example and the first embodiment of the present invention;

"FIG. 7 is a schematic cross-sectional view illustrating an OLED display according to a second embodiment of the present invention;

"FIG. 8 is a schematic cross-sectional view illustrating a heat radiation plate according to the second embodiment of the present invention;

"FIG. 9 is a schematic view illustrating a heat transfer path of a heat produced by a control board according to the second embodiment of the present invention; and

"FIG. 10 is a view showing examples of measured temperatures of organic light emitting diode panels of the related art and the second embodiment of the present invention."

For more information, see this patent application: BANG, Jin-Young. Organic Light Emitting Diode Display. Filed August 2, 2013 and posted April 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5470&p=110&f=G&l=50&d=PG01&S1=20140417.PD.&OS=PD/20140417&RS=PD/20140417

Keywords for this news article include: Electronics, Circuit Board, Lg Display Co. Ltd., Light-emitting Diode.

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Source: Electronics Newsweekly


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