No assignee for this patent application has been made.
News editors obtained the following quote from the background information supplied by the inventors: "The invention relates to a light source module, and especially relates to a light source module using lens to modulate light field.
"The light-emitting property of conventional light sources of light-emitting diode (LED) approaches a Lambertian light source. When the light source is used directly as an illumination light source, the Unified Glare Ratio (UGR) thereof may still be too high for general indoor illumination purposes (such as for reading, writing, conference, general computer work and so on), easily leading to discomfort to users. Lamps with anti-glare function on the market usually have a polarizing plate disposed in front of a light-emitting source thereof for modifying the light-emitting property thereof to reduce the UGR thereof, so as to achieve the purpose of anti-glare. However, the polarizing plate also reduces the illumination of the lamp; that is, the whole energy use efficiency of the lamp decreases. It goes against power saving tendency."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "An objective of the invention is to provide a light source module, which has a lens disposed in front of a light-emitting source thereof and uses the lens to modulate light beams for improving the light field of the light source module under insignificant influence on the whole light-emitting efficiency of the light source module, so as to reduce the UGR and reduce glare degree. Therefore, the invention can solve the problems of glare and decreased illumination due to a polarizing plate in the prior art.
"The light source module of the invention includes a carrier, a light-emitting unit, and a lens. The light-emitting unit is disposed on the carrier and has a light-emitting surface. The lens is disposed above the light-emitting unit and has a bottom surface and a tapered top surface opposite to the bottom surface. The bottom surface is opposite right to the light-emitting surface. A gap exists between the bottom surface and the light-emitting surface. Thereby, light beams emitted by the light-emitting unit are modulated by the lens to be mostly concentrated relatively in a specific radiation angle range and distributed more uniform within the specific radiation angle range, which is conducive to reduction of the glare degree of the light source module. By proper design for the tapered top surface, the light source module can be applicable to general indoor illumination purposes (such as for reading, writing, conference, general computer work and so on).
"Further, the tapered top surface is substantially a side surface of a cone or a pyramid. The tapered top surface has a vertex angle within a range from 140 to 160 degrees, which makes the UGR of the light source module less than 19.
"In practice, the light source module can include a plurality of light-emitting units and a plurality of lenses. Each light-emitting unit corresponds to one of the lenses and is disposed to cover the corresponding lens. The light-emitting units are arranged in a row on the carrier to form a light bar, or in several rows. If the carrier is a columnar object, the light-emitting units are disposed in ring on side surfaces of the carrier. Each side surfaces thereon can dispose several of the light-emitting units. The lenses can be formed in one piece; the lenses as a whole can be regarded in logic as an optical modulation device which covers the carrier and the light-emitting units so as to forma light bar capable of emitting light at all sides. In an embodiment, the carrier includes a circuit board. The light-emitting unit is an LED device electrically connected onto the circuit board.
"These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 is a schematic diagram illustrating a light source module of a preferred embodiment according to the invention.
"FIG. 2 is a sectional view of apart of the light source module in FIG. 1 along the line X-X.
"FIG. 3 is a schematic diagram illustrating a light source module of another embodiment according to the invention.
"FIG. 4 is a schematic diagram illustrating a light source module of another embodiment according to the invention.
"FIG. 5 is a sectional view of a part of the light source module in FIG. 4 along the line Y-Y."
For additional information on this patent application, see: Ye, Zhi-Ting; Lin, Ming-Chuan. Light Source Module. Filed
Keywords for this news article include: Patents, Electronics, Circuit Board.
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