Light emitting diode array module for providing backlight and backlight unit having the same
First Claim
1. A backlight unit for a display device, said backlight unit comprising a plurality of Light Emitting Diode (LED) array modules arranged in a plurality of rows and columns, the LED array modules being arranged at regular intervals in each of the rows, each of LED array modules in a first row being located to face a space between two adjacent LED array modules in a second row in a relationship of two adjacent rows;
- each of said LED array modules comprising;
a bar-shaped Printed Circuit Board (PCB) on which conductive patterns for transmitting power are formed;
a base formed on the PCB and made of a heat conductive material;
a plurality of LED chips mounted on the base in a line and electrically connected to the conductive patterns of the PCB;
a reflector formed to surround the plurality of the LED chips and adapted to reflect light radiated from the plurality of LED chips upward; and
a lens which is formed above the plurality of LED chips and the reflector, and has a bar shape;
wherein said lens diffuses, in a horizontal direction, the light radiated from the plurality of LED chips and reflected by the reflector.
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Accused Products
Abstract
A Light Emitting Diode (LED) array module, which can be used as backlight, includes a bar-shaped Printed Circuit Board (PCB) on which conductive patterns for transmitting power are formed, a base formed on the PCB and made of a heat conductive material, a plurality of LED chips mounted on the base in a line and electrically connected to the conductive patterns of the PCB, a reflector formed to surround the plurality of the LED chips and adapted to reflect light radiated from the plurality of LED chips upward, and a lens formed above the plurality of LED chips and reflector to have a bar shape and adapted to diffuse the light radiated from the plurality of LED chips and reflector in a horizontal direction.
185 Citations
8 Claims
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1. A backlight unit for a display device, said backlight unit comprising a plurality of Light Emitting Diode (LED) array modules arranged in a plurality of rows and columns, the LED array modules being arranged at regular intervals in each of the rows, each of LED array modules in a first row being located to face a space between two adjacent LED array modules in a second row in a relationship of two adjacent rows;
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each of said LED array modules comprising; a bar-shaped Printed Circuit Board (PCB) on which conductive patterns for transmitting power are formed; a base formed on the PCB and made of a heat conductive material; a plurality of LED chips mounted on the base in a line and electrically connected to the conductive patterns of the PCB; a reflector formed to surround the plurality of the LED chips and adapted to reflect light radiated from the plurality of LED chips upward; and a lens which is formed above the plurality of LED chips and the reflector, and has a bar shape; wherein said lens diffuses, in a horizontal direction, the light radiated from the plurality of LED chips and reflected by the reflector.
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2. A Light Emitting Diode (LED) array module for use as a light source of a backlight unit, said LED module comprising:
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a bar-shaped Printed Circuit Board (PCB) on which conductive patterns for transmitting power are formed; a base formed on the PCB and made of a heat conductive material; a plurality of LED chips mounted on the base in a line and electrically connected to the conductive patterns of the PCB; a reflector formed to surround the plurality of the LED chips and adapted to reflect light radiated from the plurality of LED chips upward; and a lens which is formed above the plurality of LED chips and the reflector, and has a bar shape; wherein said lens diffuses, in a horizontal direction, the light radiated from the plurality of LED chips and reflected by the reflector; and
the lens has a cross section taken perpendicular to a longitudinal direction of said bar shape, said cross section having a star shape comprising multiple triangular points radiating from a center.
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3. A Light Emitting Diode (LED) array module, comprising:
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a Printed Circuit Board (PCB) which is elongated in a longitudinal direction of said module and on which conductive patterns for transmitting power are formed; a base which is elongated in the longitudinal direction of said module, placed above the PCB, and made of a heat conductive material; a plurality of LED chips which are mounted on an upper surface of the base in a line extending along the longitudinal direction of said module, said LED chips being electrically connected to the conductive patterns of the PCB; a reflector which is elongated in the longitudinal direction of said module, surrounds said LED chips, and is adapted to upwardly reflect light radiated from the LED chips; a lens which is elongated in the longitudinal direction of said module, placed above said LED chips and said reflector, and adapted to diffuse, in a horizontal direction, light coming from said LED chips and said reflector; and an encapsulant made of a transparent material covering and protecting said LED chips; said encapsulant being elongated in the longitudinal direction of said module and confined within a space defined by inner walls of said reflector. - View Dependent Claims (4)
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5. A Light Emitting Diode (LED) array module, comprising:
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a Printed Circuit Board (PCB) which is elongated in a longitudinal direction of said module and on which conductive patterns for transmitting power are formed; a base which is elongated in the longitudinal direction of said module, placed above the PCB, and made of a heat conductive material; a plurality of LED chips which are mounted on an upper surface of the base in a line extending alone the longitudinal direction of said module, said LED chips being electrically connected to the conductive patterns of the PCB; a reflector which is elongated in the longitudinal direction of said module, surrounds said LED chips, and is adapted to upwardly reflect light radiated from the LED chips; and a lens which is elongated in the longitudinal direction of said module, placed above said LED chips and said reflector, and adapted to diffuse, in a horizontal direction, light coming from said LED chips and said reflector; wherein said reflector is positioned on said PCB and surrounds not only said led chips but also said base.
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6. A backlight unit for a display device, said backlight unit comprising a plurality of Light Emitting Diode (LED) array modules, wherein
said LED array modules are arranged in a plurality of rows; -
the longitudinal directions of the LED array modules in each of said rows are aligned; and the LED array modules in two adjacent of said rows are staggered, in a direction perpendicular to said rows, with respect to each other; each of said LED array modules comprising; a Printed Circuit Board (PCB) which is elongated in a longitudinal direction of said module and on which conductive patterns for transmitting power are formed; a base which is elongated in the longitudinal direction of said module, placed above the PCB, and made of a heat conductive material; a plurality of LED chips which are mounted on an upper surface of the base in a line extending along the longitudinal direction of said module, said LED chips being electrically connected to the conductive patterns of the PCB; a reflector which is elongated in the longitudinal direction of said module, surrounds said LED chips, and is adapted to upwardly reflect light radiated from the LED chips; and a lens which is elongated in the longitudinal direction of said module, placed above said LED chips and said reflector, and adapted to diffuse, in a horizontal direction, light coming from said LED chips and said reflector. - View Dependent Claims (7)
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8. A Light Emitting Diode (LED) array module, comprising:
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a Printed Circuit Board (PCB) which is elongated in a longitudinal direction of said module and on which conductive patterns for transmitting power are formed; a base which is elongated in the longitudinal direction of said module, placed above the PCB, and made of a heat conductive material; a plurality of LED chips which are mounted on an upper surface of the base in a line extending along the longitudinal direction of said module, said LED chips being electrically connected to the conductive patterns of the PCB; a reflector which is elongated in the longitudinal direction of said module, surrounds said LED chips, and is adapted to upwardly reflect light radiated from the LED chips; and a lens which is elongated in the longitudinal direction of said module, placed above said LED chips and said reflector, and adapted to diffuse, in a horizontal direction, light coming from said LED chips and said reflector; wherein the lens comprises a plurality of projections elongated in said longitudinal direction; and lens has a cross section taken perpendicular to said longitudinal direction, said cross section comprising multiple triangular points radiating from a center, each of said triangular points corresponding to one of said projections.
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Specification