摘要:
The LED package includes a substrate, one LED or more separated from each other by designated intervals and arranged in a line on the substrate, and a molding portion, for sealing the upper surface of the substrate including the LEDs, provided with an upper surface including two curved surfaces having circular circumferential shapes, wherein each of the curved surfaces has a curvature for totally reflecting light emitted from the LEDs. The LED package assures a sufficient optical traveling route therein without requiring a separate light guide plate, thereby emitting a white ray having uniform luminance.
摘要:
An LCD backlight apparatus includes a light guide plate placed under an LCD panel of the LCD to guide light to the LCD panel. The light guide plate has an even upper surface and a scattering pattern formed in a bottom surface. A plurality of monochromatic light sources are placed in line at a side of the light guide plate to radiate light along the plane direction of the light guide plate between the upper and bottom surfaces of the light guide plate. The light sources are adapted to radiate light beams at a predetermined beam angle so that the light beams reach the scattering pattern only after having propagated a predetermined reference length necessary for forming white light when mixed together. The LCD backlight apparatus can reduce the Bezel width without increasing the thickness of the LCD.
摘要:
A multi-lens LED has multiple lenses and an intermediate layer interposed between the multiple lenses in order to radiate light emitted from an LED chip in a desired direction and/or at a desired beam angle. The first lens is centered behind the LED chip when seen in the propagation direction of light. The second lens has a concave structure and surrounds the first lens. The intermediate layer is interposed between the first and second lenses, so that light emitted from the LED chip can be radiated at a wide beam angle. When provided in the form of a hemisphere, the multi-lens LED can be attached, e.g., to a wall or a ceiling for interior lighting. On the other hand, when provided in the form of a semicylinder, the multi-lens LEDs can be arranged in arrays to be used, e.g., as a light source of an LCD backlight apparatus.
摘要:
The present invention relates to an LED lens, in which a planar bottom has a pair of halves symmetrically connected with each other about a reference line and narrowed in the vicinity of the reference line. A pair of substantially semicircular reflecting surfaces are extended from both edges of the bottom connected with both ends of the reference line. A radiating surface is connected with remaining edges of the bottom and semicircular edges of the reflecting surfaces. The reflecting surfaces reflect light beams are introduced from the LED chip through the bottom toward the radiating surface. The radiating surface radiates the light beams to the outside when the light beams are introduced to the radiating surface through reflection from the reflecting surfaces and directly through the bottom, so that the light beams are radiated to the outside in a predetermined beam angle.
摘要:
An RGB light emitting diode package with improved color mixing properties includes red, green, and blue light emitting diode chips provided on a reflector. A photomixing material and a filler resin scatters rays so as to uniformly mix the rays emitted from the light emitting diode chips. The photomixing material and filler resin are applied onto upper sides of the light emitting diode chips while being mixed with each other, and the photomixing material is uniformly dispersed in the filler resin.
摘要:
An LED package comprises a substrate, one or three terminals formed on a first side of the substrate, three terminals formed on a second side opposite to the first side, and two or three LEDs disposed on the substrate, one of the LEDS being electrically connected to one of the terminals formed on the first side while being electrically connected to one of the terminals formed on the second side, and other LEDS being electrically connected to two terminals formed on the first side or to two terminals formed on the second side. A light source comprises the LED packages having the structure as described above. Without being arranged in a line, the LEDs emitting the same color are differently arranged in every LED package, thereby solving the problem of non-uniform combination of the colors according to the positions of the LEDs on an LED package-mounting substrate.
摘要:
Disclosed herein is a vertical light emitting type backlight module, for irradiating white light to the rear side of a liquid crystal display in the perpendicular direction. The vertical light emitting type backlight module comprises a) one or more LED array modules, each comprising a substrate having conductive patterns printed on upper and lower surfaces of the substrate, respectively, a plurality of LED devices mounted on the upper and lower surfaces of the substrate, respectively, for emitting light toward the front of respective surfaces of the substrate with the LED devices mounted thereon, and a plurality of lenses formed to surround the LED devices, respectively, for directing the light emitted from the LED devices in a direction perpendicular to the LED while being within a predetermined angle from an axis parallel to a plane of the backlight module, the substrate being mounted perpendicular to the plane of the backlight module such that the light emitted from the LED devices is emitted in a direction approximately parallel to the plane of the backlight module, and b) a reflection plate for each of the LED array modules for reflecting the light spread in the horizontal direction to change path of the light to the perpendicular direction.
摘要:
Disclosed herein is a light emitting diode (LED) device. The light emitting diode device comprises a package formed with a terminal for applying an electrical signal, one or more LED chips mounted on the package such that the LED chips are electrically connected to the terminal, a lens formed to surround the LED chips on the package for changing path of light emitted from the LED chips to the horizontal direction with the difference of the refraction rates of the media, and a reflector formed on the lens for reflecting the light, emitted above the lens without being refracted in the horizontal direction at the lens, to the horizontal direction. The LED device reflects the light, which is deviated from the optical design range of the lens and emitted above the lens, back to the lens, thereby preventing the hot spot from being generated, and enhancing horizontal emission efficiency of the light.
摘要:
An LED package used as a light source in a backlight assembly for an LCD includes a substrate, a plurality of light scattering protrusions on the upper surface of the substrate, LEDs separated from each other by designated intervals and arranged in a line on the substrate, and a molding portion, for sealing the upper surface of the substrate including the LEDs, and having an upper surface including two cylindrical surface sections. Each of the cylindrical surface sections has a curvature for totally reflecting light emitted from the LEDs.
摘要:
A white light emitting device including: a blue light emitting diode chip having a dominant wavelength of 443 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.