Patent Publication Number: US-2006012992-A1

Title: LED luminance enhancing construction

Description:
BACKGROUND OF THE INVENTION  
      (a) Field of the Invention  
      The present invention is related to an improved construction of a light emitting diode (LED), and more particularly, to one that enhances the lamination results for the LED.  
      (b) Description of the Prior Art  
      The LED generally available in the market for giving features of being compact, low power consumption, lower heat generated and longer service life have been gradually exiting the conventional tungsten lamps in the adaptation to commodities such as Christmas decoration lights, flash lights, vehicle signal lamps, and traffic signs. The LED is essentially comprised of a see-three packaging containing conductors of different polarities and a carrier. A chip is fixed to the carrier, and a golden plated wire connects an electrode layer of the chip to the conductor while each conductor extends out of the transparent packaging to serve as a contact to the power source.  
      Accordingly, when the conductor is conducted, the light source generated by the chip emits the light. A fluorescent material may be provided to the peripheral of the chip so that when the light source generated from the chip penetrates the fluorescent material, the wavelength of the source light is incorporated with that of the fluorescence material to produce the light color expected. With improved manufacturing process and workmanship, the LED may be designed to emit a specific light color depending on the type of fluorescent material used to further expand the application range of the LED in the market. However, current R&amp;D efforts for the LED are essentially invested in the color performance results and the increase of the production capacity of the LED. Therefore, there has been so far the absence of seeing any breakthrough in enhancing the luminance of the LED.  
     SUMMARY OF THE INVENTION  
      The primary purpose of the present invention is to provide a construction for enhancing the luminance of a light emitting diode. To achieve the purpose, the LED is related to a transparent packaging containing conductors of different polarities and a carrier. A chip and a fluorescence material are fixed to the carrier; and a golden plated wire connects the electrode layer of the chip and the conductors. A bowl reflector is disposed to a carrier of the LED and a chip as the light source is disposed at the center of the bottom of the reflector. Multiple reflection blocks surround the inner layer of the bowl reflector with each reflection block comprised of multiple transitional reflection surfaces from the bottom towards the top edge of the bowl reflector. Accordingly, each transitional reflection surface focuses light source from each part of the chip to project the light into the area above the chip. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a schematic view showing a construction of a light emitting diode of a first preferred embodiment of the present invention.  
       FIG. 2  is an exploded view showing a chip and a reflector in the first preferred embodiment of the present invention.  
       FIG. 3  is a schematic view showing the reflection status of the light source from each part of the chip in the first preferred embodiment of the present invention.  
       FIG. 4  is a schematic view showing a construction of a light emitting diode of a second preferred embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Referring to  FIG. 1  for the basic construction of a light emitting diode, the LED is comprised of a transparent packaging  10  containing conductors  20  of different polarities and a carrier  30 . A chip  40  and a fluorescent material  60  are fixed to the carrier  30 . The conductor  20  is connected to the electrode layer  41  of the chip  40  by a golden plated wire  50 . Each conductor  20  extends out of the transparent packaging  10  to serve as a contact for the power supply.  
      Accordingly, when the conductor  20  is conducted, the light generated from the chip  40  passes through the fluorescent material  60 , wherein, the wave length of the source light is incorporated with that of the fluorescent material  60  to emit the light color expected.  
      As illustrated in  FIG. 2 , a reflector  70  is further provided at where between the carrier  30  and the chip  40 . In a first preferred embodiment of the present invention, the carrier  30  in a bowl structure is provided on one conductor  20  and the reflector also in a blow structure is fixed to the carrier  30 . The chip  40  is fixed to the center at the bottom of the reflector  70 . The fluorescent material  60  relates to an admixture comprised of the adhesive material used to fix the chip  40  to the reflector  70  and fluorescent powders so to apply between the chip  40  and the reflector  70  to forthwith adhere the chip  40  to the reflector  70 .  
      Multiple reflection blocks each in fan-shaped surround in radius the inner layer of the bowl of the reflector  70 . Each reflection block  71  is patched up with multiple transitional reflection surfaces  72  from the bottom towards the top edge of the bowl reflector  70 . In the first preferred embodiment of the present invention, each sector of those reflection blocks  71  is patched up with multiple transitional reflection surfaces  72  each in the form a glass mirror to surround the bowl reflector  70 . A reflection surface is thus formed in the inner layer of the reflector  70  by multiple transitional reflection surfaces  72  respectively at a given height and angle for each transitional reflection surface  72  to focus the light source form each part of the chip  40  and project the light into the area above the chip  40  to effectively increase the luminance of the LED as illustrated in  FIG. 3 .  
      The type of the fluorescent material  60  may vary depending on the spatial structure and manufacturing process of the LED. For the first preferred embodiment illustrated in  FIG. 1 , transparent insulation glue  11  is formed on the surface of the chip as demanded by the manufacturing process of the LED. Furthermore, as illustrated in  FIG. 4  for a second preferred embodiment of the present invention, the LED is directly constructed on a circuit board  80 . A recessed carrier  30  is preset on the circuit board  80  with the reflector  70  fixed at the bottom inside the carrier and each conductor (not illustrated) is directly arranged on the contact of the circuit board  80 .  
      In the second preferred embodiment of the present invention, the fluorescent material  60  comprised of transparent insulation glue and fluorescent powders are filled into the carrier  30 , then baked and hardened. The fluorescent material  60  due to its central gravity consistently caps on the surface of the chip  40  with the transparent insulation glue on top to become crystal clear insulator  11  to directly cap on the utmost top layer of the chip  40  to protect the chip  40 .  
      The present invention provides an improved construction of a light emitting diode to effectively enhance its luminance, and this application for a utility patent is duly filed. However, it is to be noted that that those preferred embodiments disclosed in the specification and the accompanying drawings are in no way limiting the present invention. Therefore, any construction, installation, or characteristics that is same or similar to that of the present invention should fall within the scope of the purposes and claims of the present invention.