Patent Publication Number: US-2006017058-A1

Title: Construction of LED circuit board

Description:
BACKGROUND OF THE INVENTION  
      (a) Field of the Invention  
      The present invention is related to an improved construction of a flat LED circuit board, and more particularly, to a simple construction allowing the completion of given number of flat LED on a molding plate in a given size.  
      (b) Description of the Prior Art  
      Production cost of light emitting diode (LED) has been significantly reduced thanks to continuous improvement in LED process technology. Furthermore, the LED capable of emitting a given light color by directly incorporating the wavelength of light source from a chip and that of a fluorescence material is gradually taking over the applications of the conventional bulbs in Christmas decoration light strings, flashlight and traffic signs, and is extremely fast expanding its market territory.  
      While enjoying its expanded applications, the LED is evolving either in its construction or appearance. Other than the most common form of having an electricity pin extended from a light emission end, the LED may be directly built on a circuit board. Therefore, the improved construction disclosed in the present invention essentially involves a simple construction of a circuit board in a given size provided with a given number of flat LED to help control of costs of materials and control of materials and quantity similar to that for LED device.  
     SUMMARY OF THE INVENTION  
      The primary purpose of the present invention is to provide a construction of LED circuit board essentially comprised of a pit carrier on a baseboard and multiple conduction circuits of different polarities on the peripheral of the carrier. One end facing toward the carrier of each conduction circuit is related to a chip conductor maintaining a fixed spacing with the carrier while the other end of the conduction circuit extends to the edge of the circuit board to become a service assembly end for the use of the LED. A chip is plated to the carrier and a golden plated wire connects an electrode layer of the chip and the chip conductor of each conduction circuit for the configuration of an LED circuit board.  
      Furthermore, in the molding process of the circuit board of the present invention, each LED baseboard is arranged on a molding board at a given spacing from another LED baseboard to allow the mass production of the LED baseboard in the automated process. The present invention also facilitates the automated process in the subsequent process for the production of the LED. Accordingly, the present invention by allowing the completion of a given number of flat LED on the molding board in a given size helps the material/quantity control similar to that for the LED device. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is an upward view of a layout of a first preferred embodiment of the present invention.  
       FIG. 2  is a sectional view of a local part of the LED of the present invention.  
       FIG. 3  is an upward view of a layout of a second preferred embodiment of the present invention.  
       FIG. 4  is a layout of a molding board of the circuit board of the present invention.  
       FIG. 5  is an upward view of a layout of a third preferred embodiment of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Referring to  FIG. 1 , a basic construction of a circuit board of the present invention is comprised of a pit carrier  11  provided on a baseboard  10  and multiple conduction circuit  12  of different polarities disposed on the peripheral of the carrier  11 . Each conduction circuit  12  relates to a cooper foil printed on the baseboard  10 . Once end facing the carrier  11  of each conduction circuit  12  relates to a chip conductor  121  keeping a fixed spacing with the carrier, and the other end of the conduction circuit  12  extends to the edge of the baseboard  10  to become a service assembly end  122  to function as a soldering end for related circuit when the baseboard  10  is used as an LED.  
      Accordingly, a chip  20  is planted in the carrier  11  on the baseboard  10  as illustrated in  FIGS. 1 and 2 . Wherein, the chip  20  is fixed to the bottom of the carrier  11  with an adhesive  30  mixed with a fluorescent material  31 ; a golden plated wire  40  connects an electrode layer  21  of the chip and the chip conductor  121  of each conduction circuit  12 ; and a transparent capping layer  50  made of a transparent insulation glue covers up the surface of the chip to become an integral flat LED.  
      The circuit of the chip conductor  121  and the service assembly end  122  of each conduction circuit  12  can be arranged on the baseboard  10  as illustrated in  FIG. 5 . Wherein, one end of the chip conductor  121  is connected to the service assembly end  122 , and the other end is laid on one side of the carrier  11 . Therefore, when the chip  20  is fixed to the bottom of the carrier  11  using the adhesive  30  mixed with the fluorescent material  31 , the chip is connected to the chip conductor  121  of each conduction circuit without relying upon the golden plated wire  40 .  
      Each flat LED, as illustrated in  FIG. 3 , may be provided in the same carrier  11  multiple chips to increase the luminance of the LED.  
      Now referred in to  FIG. 4 , each LED baseboard  10  may be arranged on a molding board at a given spacing from another LED baseboard  10  to allow massive production in an automated process. The present invention also facilitates the automated process in the subsequent manufacturing of LED by completing a given number of flat LED on the molding board in given size so to help the material/quantity control similar to that for LED device.  
      When the construction of the circuit board of the present invention allows multiple LED baseboards  10  arranged on the molding board at a given spacing from one another for the mass production, the molding board is provided with a positioning hole between any two abutted baseboards  10  to facilitate the positioning in the manufacturing process. The positioning hole  12  may be disposed at the service  3  assembly end of each conduction circuit  12 . According, upon feeding the individual baseboard as illustrated in  FIGS. 1 and 4 , the positioning hole  13  serves a dividing point of the feeding for a concave  13  to be produced at the edge of the service assembly end  122  of each conduction circuit for the baseboard  10  fed to facilitate the attachment of the solder (soldering tin) to help the assembly between the LED and related circuits.  
      The present invention provides an improved construction of a flat LED circuit board, therefore, this application for a utility patent is duly filed accordingly. 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.