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Researchers Submit Patent Application, "Light Source Module and Light Source Assembly Having the Same", for Approval

February 6, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors PARK, Chan-Jae (Busan, KR); BAEK, Seung-Hwan (Seoul, KR); HAN, Youn-Ho (Yongin-si, KR); NAM, Seok-Hyun (Seoul, KR); LEE, Sang-Won (Seongnam-si, KR); LEE, Young-Keun (Cheonan-si, KR), filed on November 17, 2012, was made available online on January 23, 2014.

The patent's assignee is Samsung Display Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "Exemplary embodiments of the invention relate to a light source module, and a light source assembly having the light source module. More particularly, exemplary embodiments of the invention relate to a light source module used for a display apparatus, and a light source assembly having the light source module.

"A display apparatus includes a display panel displaying an image, and a light source assembly providing a light to the display panel. An edge-illumination type light source assembly in which a light source unit is disposed at an edge of a light guide plate is normally used for the display apparatus, to decrease a thickness of the display apparatus.

"Further, as light-efficiency of a light source increases, a corner-illumination type light source assembly in which the light source unit is disposed at a corner of the light guide plate has been used for the display apparatus, to decrease an area which the light source unit occupies.

"However, where the number of the light sources decreases and the light source unit is disposed at the edge or the corner of the light guide plate, a heat generated from the light source unit is focused on a specific portion, such that it is desirable to dissipate the heat more efficiently. In addition, a hot spot may occur more easily at the specific portion in which the light source unit is disposed. Thus, a specific structure is desired to enhance heat dissipation, so that a bezel of the display apparatus may be decreased.

"Further, even though the light source unit is merely disposed at the edge or the corner of the light guide plate, an additional space for the light source unit and for a driving unit for the light source unit is necessary, such that it may be difficult to reduce a size of the bezel."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "One or more exemplary embodiment of the invention provides a light source module without a specific dissipation structure and capable of decreasing a bezel-size of a display apparatus.

"One or more exemplary embodiment of the invention also provides a light source assembly having the light source module.

"An exemplary embodiment of a light source module according to the invention includes a light source unit, a light transmitting part and a light emitting part. The light source unit generates a light. The light transmitting part transmits the light generated by the light source unit. The light emitting part is spaced apart from the light source unit and includes a light emitting surface. The light emitting part emits the light transmitted by the light transmitting part, through the light emitting surface.

"In an exemplary embodiment, the light emitting part may further include upper and lower reflective surfaces facing each other, and a rear reflective surface connecting the upper and lower reflective surfaces with each other and connected to the light transmitting part.

"In an exemplary embodiment, the light emitting surface may have a curved shape, and each of the upper and lower reflective surfaces may have a half-circular plate shape.

"In an exemplary embodiment, the light generated by the light source unit may be a blue light B.

"In an exemplary embodiment, the upper and lower reflective surfaces, the rear reflective surface and the light emitting surface may form a receiving space. A light converting material converting the blue light B to a white light W, and an enclosing material fixing and enclosing the light converting material, may fill the receiving space.

"In an exemplary embodiment, the light converting material may include a phosphor or a quantum dot, and the enclosing material may include a silicone.

"In an exemplary embodiment, each of the light transmitting part and the light emitting part may be plural. The plural light transmitting parts may be respectively connected to the plural light emitting parts.

"In an exemplary embodiment, the light generated by the light source unit may include a red light R, a green light G and a blue light B.

"In an exemplary embodiment, the upper and lower reflective surfaces, the rear reflective surface and the light emitting surface may form a receiving space. An enclosing material may fill the receiving space. The red light R, the green light G and the blue light B may be mixed to be a white light W in the receiving space.

"In an exemplary embodiment, the light transmitting part may transmit the red light R, the green light G and the blue light B to one light emitting part.

"In an exemplary embodiment, the light generated by the light source unit may include a first light, a second light and a blue light B. A red light R and the blue light B may be mixed to be the first light, and a green light G and the blue light B may be mixed to be the second light.

"In an exemplary embodiment, the upper and lower reflective surfaces, the rear reflective surface and the light emitting surface may form a receiving space. An enclosing material may fill the receiving space.

"In an exemplary embodiment, the light transmitting part may transmit the first light, the second light and the blue light B to one light emitting part.

"In an exemplary embodiment, the light transmitting part may be an optical fiber cable.

"In an exemplary embodiment, the light source unit may include a light emitting diode ('LED') which emits the light, a first lens which advances the light in parallel, and a second lens which focuses the light to the light transmitting part.

"In an exemplary embodiment of a light source assembly according to the invention, the light source assembly includes a light guide plate which guides a light, and a light source module providing the light to the light guide plate. The light source module includes a light source unit which generates the light, a light transmitting part which transmits the light generated by the light source unit, and a light emitting part spaced apart from the light source unit and including a light emitting surface, where the light emitting part emits the light transmitted from the light transmitting part, through the light emitting surface.

"In an exemplary embodiment, the light guide plate may have first and second side surfaces which cross each other, and the light source module may be disposed at a corner portion of the light guide plate where the first and second side surfaces cross each other.

"In an exemplary embodiment, the light emitting surface may have a curved shape, and the light guide plate may further include an incident surface into which the light from the light emitting surface is incident. The incident surface may be disposed between the first and second side surfaces and may have a curved shape.

"In an exemplary embodiment, the light guide plate may have a light incident side surface, and a plurality of the light source modules may be disposed adjacent to the light incident side surface.

"In an exemplary embodiment, the light incident side surface may include a plurality of incident surfaces with a concave curved shape. The light source modules may be respectively disposed adjacent to the incident surfaces.

"According to one or more exemplary embodiment of the invention, the light source unit is spaced apart from the light emitting part, and thus an additional dissipation structure is unnecessary in the light source assembly. In addition, a decrease in display quality or durability due to heat generated from the light source unit is reduced or effectively prevented. Since the heat generated from the light source unit is not transmitted to the light guide plate, for example, a hot spot or bending of the light guide plate may be reduced or effectively prevented.

"In addition, even though the light emitting part is disposed at the corner portion of the light guide plate, the light emitting surface of the light emitting part and the incident surface of the light guide plate both have curved shape, and thus the light incident into the light guide plate may have a wide light-advancing angle.

"In addition, the incident surface of the light guide plate is concaved with the curved shape and the light emitting part is disposed at the concaved portion of the incident surface. Thus an area occupied by the light emitting part may be minimized both when the light emitting part is disposed at the corner portion of the light guide plate and when the light emitting part is disposed at the side surface of the light guide plate. Thus, an area of a bezel of a display apparatus may be reduced and minimized.

"In addition, the light source part may merely emit the blue light, and the light emitting part may include the light converting material to convert the blue light to the white light, so that the light efficiency may be enhanced and a coupling between the light emitting part and the light transmitting part may be enhanced.

"Alternatively, even where the light source part emits the red, green and blue lights, the light emitting part may mix the red, green and blue lights to make the white light and emits the white light, so that the light transmitting part merely transmits one color light. Thus the coupling between the light emitting part and the light transmitting part may be more enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS

"The above and other features and advantages of the invention will become more apparent by describing in detailed exemplary embodiments thereof with reference to the accompanying drawings, in which:

"FIG. 1 is an exploded perspective view illustrating an exemplary embodiment of a display apparatus according to the invention;

"FIG. 2 is a cross-sectional view taken along line I-I' in FIG. 1;

"FIG. 3 is a perspective view illustrating an exemplary embodiment of a light source module in FIG. 1;

"FIG. 4 is a block diagram illustrating an exemplary embodiment of a process of emitting a light in the light source module in FIG. 3;

"FIG. 5 is a perspective view illustrating another exemplary embodiment of a light source module according to the invention;

"FIG. 6 is a perspective view illustrating still another exemplary embodiment of a light source module according to the invention;

"FIG. 7 is a perspective view illustrating yet another exemplary embodiment of a light source module according to the invention; and

"FIG. 8 is a perspective view illustrating another exemplary embodiment of a light source assembly according to the invention."

For additional information on this patent application, see: PARK, Chan-Jae; BAEK, Seung-Hwan; HAN, Youn-Ho; NAM, Seok-Hyun; LEE, Sang-Won; LEE, Young-Keun. Light Source Module and Light Source Assembly Having the Same. Filed November 17, 2012 and posted January 23, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=3796&p=76&f=G&l=50&d=PG01&S1=20140116.PD.&OS=PD/20140116&RS=PD/20140116

Keywords for this news article include: Samsung Display Co. Ltd.

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Source: Politics & Government Week


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