Patent Publication Number: US-2020303353-A1

Title: Panel light

Description:
BACKGROUND OF INVENTION 
     1. Field of the Invention 
     This project relates generally to a panel light with a simple structure and uniform luminescence. 
     2. Description of Related Art 
     The panel light is extensively used for indoor lighting for large luminous surface. General panel light comprises a framework made of aluminum alloy material, a panel installed on the lower surface of framework and a casing installed on the upper end of framework. At present, the illuminant of panel light uses LED chips as light source. In order to obtain more uniform and wider luminescence, the general illuminant mode is that multiple LED chips are distributed uniformly on the circuit board, as the light rays emitted from the LED chips are point source, which cannot be directly used as area light source. Therefore, to make these arrayed LED chips emit soft light rays, a panel is required to guide the light rays. The panel is usually made of plastic materials with better optical activity. The light rays are refracted by the panel to form a more uniform and softer light source. 
     At present, in the manufacture of LED panel light, the optical structure of panel is improved to enhance the luminescent effect of panel light. This project proposes improving the luminescent effect of each LED chip directly, so as to enhance the luminescent effect of overall panel light. Based on this, this project proposes the following technical proposal. 
     SUMMARY OF THE INVENTION 
     The purpose of the present invention is to overcome the deficiencies in the existing technology to provide a panel light with a simple structure and uniform luminescence. 
     In order to solve the above problems, the technical scheme of the present invention is described below: 
     A panel light, comprising a framework and a casing and a panel installed on the framework; the casing having a chamber disposed therein; the chamber having illuminants for lighting wherein the illuminant includes a circuit board, a LED chip for emitting light integrated on the circuit board and a lens covering the LED chip; 
     wherein the lens is integrally formed with a surface having a convex curved surface and a bottom surface attached to the circuit board, a recess disposed along a center of the bottom surface for accommodating the LED chip; 
     wherein the lens is fixed on the circuit board, and the LED chip is covered by the recess, and the light generated by the LED chip passes through the lens and is then illuminated through the panel. 
     More particularly, wherein a central position of the surface of the lens forms a concave surface. 
     More particularly, wherein a cross section of an inner surface of the recess of the lens forms a parabolic curve. 
     4 More particularly, wherein the parabolic curve converges at a central vertex of an inner surface opposite to an opening of the recess. 
     More particularly, wherein the lens has a bulge outwards along the bottom surface, the bulge has a positioning lug connected to the circuit board. 
     More particularly, wherein the circuit boards are uniformly mounted on the inner surface of the casing, and LED chips are evenly distributed on each of the circuit boards 
     More particularly, wherein the framework is a rectangular framework, an inner frame is formed along the edges of framework, the mounting edges corresponding to the inner frame are formed on the edges of the casing, a hold-down frame protruding downward is formed along the inner side of mounting edges. 
     In comparison with the existing technology, this project has the following effects: 
     In this project, each LED chip is covered with a lens, the lens refracts the light rays generated by the LED chip, the illumination angle of the original LED chip is changed, so that a larger range of irradiation is formed after the light rays penetrate through the lens. When these light rays irradiate the panel, more uniform luminescent effect is formed. 
     This project has a very simple structure, the panel can be fixed without screws or buckles. When the casing is fixed, the casing holds down the panel to fix the panel into the framework. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS: 
         FIG. 1  is a schematic view of a panel light of the present invention; 
         FIG. 2  is a schematic of the light of the present invention without panel; 
         FIG. 3  is a three-dimensional exploded view of the panel light of the present invention; 
         FIG. 4  is a sectional view of an illuminant of the present invention; 
         FIG. 5  is a schematic of back view of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in  FIG. 1  to  FIG. 5 , a panel light comprises a framework  1 , a casing  2 , a panel  3 , illuminants  4  and a supply unit  5 . 
     Said framework  1  is generally a rectangular framework, made of aluminum alloy or POM. The casing  2  and panel  3  are fixed to the framework  1 . A chamber  20  is formed in the casing  2 . The illuminants  4  are located in the chamber  10 . The supply unit  5  is fixed to a side of casing  2 . Certainly, the supply unit  5  can be fixed to the framework  1  or installed in other positions. The supply unit  5  is connected to the circuit board of illuminants  4  by conductors. 
     An inner frame  11  is formed along the edges of framework  1 . The mounting edges  21  corresponding to the inner frame  11  are formed on the edges of said casing  2 . A hold-down frame  22  protruding downward is formed along the inner side of mounting edges  21 . 
     An open area is formed in the center of said framework  1 . An inner frame  11  is formed on the edges of framework  1 . The region surrounded by the inner frame  11  exactly corresponds to the size of casing  2 . Said casing  2  is placed in the inner frame  11  of framework I directly. The mounting edges  21  corresponding to the inner frame  11  are formed on the edges of said casing  2 . The mounting edges  21  are provided with threaded holes  210 . In addition, a hold-down frame  22  protruding downward is formed along the inner side of mounting edges  21 . 
     During installation, the panel  3  is placed above the open area of framework  1 , and then the casing  2  is placed in the inner frame  11  of framework  1 . The screws pass through the threaded holes  210  to fix the mounting edges  21  into the inner frame  11 . When the casing  2  is fixed to the top of framework  1  by screws, the hold-down frame  21  exactly holds down the panel  3  in the framework  1 , the assembly of overall panel light is finished. 
     Said illuminant  4  comprises a circuit board  41 , a LED chip  42  for emitting light integrated on the circuit board  41  and a lens  43  covering LED chip  42 . 
     Said circuit board  41  is fixed to the inner surface of casing  2 , and multiple strip-like circuit boards  41  are fixed uniformly on the inner surface of casing  2 , there are LED chips  42  distributed uniformly on each circuit board  41 . In order to enhance the strength of casing  2 , there are reinforcing lugs  23  formed on the inner surface of casing  2 . These reinforcing lugs  23  behave as stiffeners, enhancing the deformation strength of inner surface of overall casing  2 , and restraining the installation of circuit board  41 . 
     Said lens  43  is formed integrally, it has a convex surface  431  and a bottom surface  432  adhering to the surface of circuit board  41 . A recess  430  for holding the LED chip  42  is provided in the center of said bottom surface  432 . Said lens  43  is fixed to the circuit board  41 , and the recess  430  covers the LED chip  42 , the light rays generated by LED chip  42  penetrate through the lens  43  and through the panel  3 . 
     As shown in  FIG. 4 , a concave surface  4310  is formed in the center of surface  431  of said lens  43 , which is to say, an inflection point is formed in the central area of surface  431  of lens  43 , the light rays in the central area are diffused more effectively, resulting in more uniform luminescence, 
     In addition, the cross section of inner surface of recess  430  of said lens  43  is a parabolic curve  4301 . Said parabolic curve  4301  converges at the central vertex  4300  opposite to the opening of recess  430  of inner surface  4301 . 
     For convenient installation, said lens  43  has a bulge  433  outwards along the bottom surface  432 , The bulge  433  has a positioning lug  434  connected to the circuit board  41 . In the installation of lens  43 , a location hole corresponding to the positioning lug  434  can be formed on the circuit board directly, the lens is fixed to the circuit board  41  by clamping.