Patent Publication Number: US-2015085487-A1

Title: Optical semiconductor based illuminating apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a divisional of U.S. patent application Ser. No. 13/482,822, filed on May 29, 2012, and claims the benefit of and priority from Korean Patent Application No. 10-2011-0103259, filed on Oct. 10, 2011, Korean Patent Application No. 10-2011-0108062, filed on Oct. 21, 2011, and Korean Patent Application No. 2011-0116739, filed on Nov. 10, 2011, which are hereby incorporated by reference for all purposes as if fully set forth herein. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an optical semiconductor based illuminating apparatus. 
     2. Discussion of the Background 
     An optical semiconductor such as a light emitting diode (LED) is one of the components that have been recently spotlighted widely as an illuminating apparatus since it has lower power consumption, a longer lifespan, more excellent durability, and significantly higher brightness as compared with an incandescent lamp and a fluorescent lamp. 
     Particularly, an illuminating apparatus using the optical semiconductor as a light source has been recently used for illumination, security, or the like. Therefore, the illuminating apparatus should be conveniently assembled and configured. In addition, since the illuminating apparatus is used in a state in which it is exposed to the air, a waterproofing property should be maintained and measures should be taken against accidents such as short circuit and electric shock. 
     In addition, the illuminating apparatus using the optical semiconductor as a light source should have a structure in which components may be instantly replaced or repaired at the time of fault generation or malfunction. 
     In the illuminating apparatus using the optical semiconductor as a light source, as wattage increases or decreases, the number of products in the module form described above increases or decreases. In the case in which a plurality of products are embedded in the illuminating apparatus, when a fault occurs in each product, the entire illuminating apparatus cannot but be disassembled and reassembled. 
     In addition, the illuminating apparatus using the optical semiconductor as a light source includes a heat sink mounted in order to improve heat radiation performance and generally exposed to the air in order to promote a heat radiation effect. However, the heat sink is polluted by excrement of birds that tend to sit down at a high place, such that the heat sink looks bad in view of an appearance. 
     Meanwhile, an illuminating apparatus using a semiconductor device such as a light emitting diode (LED) as a light source has been mainly used as an illuminating apparatus requiring a high light output, such as a factory lamp, a street lamp, or a security lamp. This illuminating apparatus generates a large amount of heat at the time of a light emitting operation of a light emitting module including a semiconductor optical device. 
     In implementing this illuminating apparatus, a distributor for distributing power lines from a main power line from a power supply to a plurality of light emitting modules is also required. 
     The distributor as described above should include a distributor body provided at one side thereof and connected to the main power line and require a plurality of distribution lines extended from the distributor body. 
     Therefore, this distributor has a structure in which the plurality of distribution lines are branched and led from the distributor body. In this structure, a waterproofing problem of the distribution lines at distribution positions has been raised. 
     SUMMARY OF THE INVENTION 
     The present invention provides an optical semiconductor based illuminating apparatus capable of promoting convenience for checking and repairing, simply performing separation and fastening, having excellent waterproofing characteristics and durability, and preventing accidents such as short circuit and electric shock. 
     Further, the present invention provides an optical semiconductor based illuminating apparatus capable of improving heat radiation performance. 
     Further, the present invention provides an optical semiconductor based illuminating apparatus capable of preventing introduction of foreign materials and being easily cleaned and maintained. 
     Further, the present invention provides an optical semiconductor based illuminating apparatus capable of reliably providing power of a main power line to a plurality of light emitting modules. 
     Further, the present invention provides an optical semiconductor based illuminating apparatus capable of utilizing a space and securing reliability of a product regardless of a size and a shape of a power supply embedded therein. 
     According to an exemplary embodiment of the present invention, there is provided an optical semiconductor based illuminating apparatus including: light emitting modules including at least one semiconductor optical device; and a housing enclosing one side surface of at least one of the light emitting modules. 
     The housing may be separated into a plurality of components. 
     The light emitting module may include: a heat sink part including the semiconductor optical device and disposed in the housing; and an optical cover coupled to the heat sink part. 
     The housing may include an outer frame enclosing one side surface of at least one of the light emitting modules. 
     The housing may further include a support having the outer frame slidably coupled thereto. 
     The housing may further include fixing plates having edges of both end portions fixed to facing surfaces of the outer frame, respectively, and embedded in the outer frame to fix both edges of the light emitting module, respectively. 
     The light emitting modules may be disposed between the fixing plates while forming one or more rows and columns. 
     The heat sink part may include: a heat radiation plate having at least one semiconductor optical device formed thereon; and a plurality of heat radiation fins formed on one surface of the heat radiation plate. 
     The heat sink part may include: a heat radiation plate having at least one semiconductor optical device formed thereon; a plurality of heat radiation thin plates disposed on the heat radiation plate; and heat pipes penetrating through the plurality of heat radiation thin plates to thereby be connected to the heat radiation plate and forming internal channels. 
     The heat sink part may include a wiring path formed by a pair of partition walls protruded from the heat radiation plate. 
     The heat sink part may further include a connection terminal mounted on the heat radiation plate forming the wiring path to thereby be electrically connected to the semiconductor optical device. 
     The heat sink part may further include: first grooves depressed in facing surfaces of the pair of partition walls, respectively; and an auxiliary cover having both end portions detachably coupled to the first grooves to cover a lower portion of the wiring path. 
     The respective connection terminals of the heat sink parts adjacent to each other may be connected to each other by a detachable connector. 
     One or more light emitting modules having the same size and shape may be disposed so as to be in parallel with each other in the housing. 
     A plurality of light emitting modules may be disposed so as to be in parallel with the fixing plates. 
     A plurality of light emitting modules may be disposed so as to be perpendicular to the fixing plates. 
     The auxiliary cover may include: a cover piece covering the wiring path while contacting edges of upper end portions of the partition walls; and auxiliary hooks protruded from a lower surface of the cover piece in a length direction of the cover piece and having end portions coupled to the first grooves. 
     The auxiliary cover may include: a cover piece contacting edges of upper end portions of the partition walls of the heat sink parts disposed in plural so as to cover the wiring path formed by the partition walls; and auxiliary hooks protruded from a lower surface of the cover piece in a length direction of the cover piece and having end portions coupled to a plurality of first grooves formed in the plurality of partition walls. 
     The outer frame of the housing may include side frames having second grooves formed in a length direction thereof and having a shape corresponding to those of fixing bars protruded on both side surfaces of the support. 
     The outer frame may further include a side bracket having a third groove formed at an upper portion of an inner side surface thereof in the length direction, a step formed at a lower portion of the inner side surface thereof, and fixing bars formed on an outer side surface thereof and corresponding to the second grooves to thereby be coupled to the side frame. 
     The outer frame may further include a connection frame having fixing pieces protruded from both end portions thereof, respectively, and having a shape corresponding to that of a coupling space formed by the fixing bars and the second grooves. 
     The optical semiconductor based illuminating apparatus may further include a cover covering an upper portion of the light emitting module and having both end portions coupled to the outer frame. 
     The cover may include: a plate covering the upper portion of the light emitting module; connection pieces extended from both end portions of the plate and bent toward the outer frame; and catching hooks extended from end portions of the connection pieces to thereby be detachably coupled to the third grooves. 
     The cover may further include reinforcing structures protruded inwardly along connection portions between the plate and the connection pieces. 
     The cover may further include step parts formed at lower portions of the connection pieces so as to be stepped and having upper end portions seated on edges of an upper portion of the outer frame, and the catching hooks may be formed at lower end portions of the step parts. 
     The reinforcing structure may include: a body protruded from the connection portion between the plate and the connection piece; and a hollow part cut inwardly in a length direction of the body and formed in a cylindrical shape at the center of the body to thereby be expanded or contracted according to elastic deformation of the connection piece. 
     The light emitting modules adjacent to each other or the outermost light emitting module and the housing may be disposed so as to be spaced apart from each other. 
     The housing may further include: a cover having both end portions detachably coupled to facing edges of the housing, respectively, while being deformed, so as to cover an upper portion of the light emitting module; and vent units formed in the cover to discharge heat generated from the light emitting module. 
     The cover may include: connection pieces extended from both end portions of a plate covering the upper portion of the light emitting module and bent toward the housing to thereby be elastically deformed so as to approach each other or be spaced apart from each other while facing each other; and catching hooks extended from end portions of the connection pieces to thereby be detachably coupled to an upper portion of an inner side surface of the housing, and the vent unit may be formed in the plate. 
     The plate may further include a plurality of grooves formed in a direction corresponding to a direction in which the plurality of light emitting modules embedded in the housing are disposed, and the vent unit may be formed between the grooves adjacent to each other. 
     The vent unit may include vent holes formed at equidistance so as to penetrate through the plate in the direction in which the light emitting modules are disposed. 
     The vent holes may penetrate through the plate in a slit shape so as to be in parallel with a plurality of heat radiation fins protruded from the light emitting module and disposed at equidistance. 
     The vent holes may penetrate through the plate in a slit shape so as to be perpendicular to a plurality of heat radiation fins protruded from the light emitting module and disposed at equidistance. 
     The vent holes may penetrate through the plate at positions corresponding to positions at which the semiconductor optical devices included in the light emitting module are disposed. 
     The vent unit may further include a vent guide extended from an edge of one side of the vent hole upwardly of the plate to cover an upper portion of the vent hole and having an outlet provided at the other side thereof. 
     An edge of the outlet side of the vent guide may be disposed on a virtual straight line extended in a direction perpendicular to an edge of the other side of the vent hole. 
     An edge of the outlet side of the vent guide may pass through a virtual straight line extended in a direction perpendicular to an edge of the other side of the vent hole and be then extended to the plate in the vicinity of the edge of the other side of the vent hole. 
     The vent unit may include a plurality of vent holes penetrating through the plate of the cover covering the upper portion of the light emitting module. 
     The optical semiconductor based illuminating apparatus may further include a distributor distributing power received from a main power line to the light emitting modules. 
     The distributor may include: a distributor body connected to the main power line; a cable jacket extended from the other side of the distributor body by a predetermined length; and a plurality of distribution cables led from the distributor body, passing through the cable jacket, and then connected to each of the plurality of light emitting modules. 
     The distributor body may include: a power distribution printed circuit board having terminals connected to the main power line and the distribution cables and a power distribution circuit connected to the terminals; and a molding part formed to cover the entire power distribution PCB. 
     The cable jacket may be extended from an inner portion of the molding part to an outer portion thereof. 
     The housing may include an auxiliary space separated from a main space by a partition wall, the distributor body may be positioned at the auxiliary space, the cable jacket may pass through the partition wall and be then extended into the main space, and the distribution cables may be branched from the cable jacket in the main space. 
     The cable jacket may be assembled to a cable gland installed at the partition wall. 
     The plurality of light emitting modules may include a heat sink provided at the rear thereof, and the heat sink may include a path at which at least one of the distribution cables is positioned and heat radiation fins formed in the vicinity of the path. 
     The plurality of light emitting modules may be disposed so as to be in parallel with each other, such that the paths are continuously connected to each other. 
     The distribution cables may have different lengths. 
     The distributor may receive direct current power from a switch mode power supply (SMPS) connected to the main power line, wherein the SMPS is positioned inside the housing. 
     The distributor may receive direct current power from an SMPS connected to the main power line, wherein the SMPS is positioned outside the housing. 
     The housing may include: a pair of rails formed on an inner surface of the support; a power supply (hereinafter, referred to as an SMPS) disposed at an upper portion of the rail; and a bracket having both end portions reciprocating along the pair of rails and fixing the SMPS. 
     The housing may further include a seat jaw disposed between the pair of rails and having the SMPS seated thereon. 
     The rails may be formed along both edges of the seat jaw. 
     The bracket may include: a first piece contacting an upper surface of the SMPS; second pieces extended from both end portions of the first piece, respectively; and third pieces extended from end portions of the second pieces, respectively, to contact the rails. 
     The housing may further include fixtures formed on an inner surface of the support and fixing both sides of one end portion of the SMPS. 
     The bracket may further include at least one bolt detachably coupled to the first piece to contact or be spaced apart from the upper surface of the SMPS. 
     The fixture may include a pair of blocks detachably coupled to the inner surface of the support and having a shape corresponding to those of cut parts formed at both sides of one end portion of the SMPS, respectively. 
     The fixture may include: fourth pieces that are in parallel with the inner surface of the support and disposed at both sides of one end portion of the SMPS, respectively; and blocking walls extended to an inner side surface of the support along two edges of the fourth pieces meeting each other and contacting both sides of one end portion of the SMPS. 
     In addition, a ‘semiconductor optical device’ described in the claims and the detailed description means a device such as a light emitting diode chip, or the like, including or using an optical semiconductor. 
     This ‘semiconductor optical device’ may include a package level of device in which various kinds of optical semiconductors including the above-mentioned light emitting diode chip is included. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1 and 2  are perspective views showing a process of separating an optical semiconductor based illuminating apparatus according to an exemplary embodiment of the present invention; 
         FIG. 3  is an exploded perspective view showing the entire configuration of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; 
         FIG. 4  is a partially cut-away perspective view showing a coupling relationship between a light emitting module and a housing which are main parts of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; 
         FIG. 5  is a perspective view showing a heat sink part and an auxiliary cover of the light emitting module which is the main part of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; 
         FIG. 6  is a view viewed from the point A of  FIG. 2 ; 
         FIGS. 7 and 8  are views showing a process of separating a cover from an upper portion of the light emitting module which is the main part of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention, wherein  FIG. 7  is a conceptual diagram showing a state before separating the cover from the upper portion of the light emitting module; and 
         FIG. 8  is a conceptual diagram showing a process of separating the cover from the upper portion of the light emitting module. 
         FIG. 9  is a perspective view showing the entire structure of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; 
         FIG. 10  is a view viewed from the point A of  FIG. 9 ; 
         FIGS. 11 and 12  are cross-sectional views taken along the line B-B′ of  FIG. 1 ; 
         FIGS. 13 to 15  are views showing a cover which is a main part of an optical semiconductor based illuminating apparatus according to another exemplary embodiment of the present invention; 
         FIG. 16  is a plan view showing a state in which the cover of the housing is omitted in the illuminating apparatus so that the rear of the light emitting module may be viewed; 
         FIG. 17  is a partially cut-away view of a distributor shown in  FIG. 16 ; 
         FIG. 18  is a conceptual diagram describing an illuminating apparatus according to another exemplary embodiment of the present invention; 
         FIG. 19  is a conceptual diagram showing a coupling relationship between a bracket and an SMPS which are main parts of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; 
         FIG. 20  is a cross-sectional view viewed from the point X of  FIG. 19 ; and 
         FIGS. 21 and 22  are partially exploded perspective views showing a state in which the SMPS is coupled to a fixture which is a main part of the optical semiconductor based illuminating apparatus according to various exemplary embodiments of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS 
     Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
       FIGS. 1 and 2  are perspective views showing a process of separating an optical semiconductor based illuminating apparatus according to an exemplary embodiment of the present invention;  FIG. 3  is an exploded perspective view showing the entire configuration of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention; and  FIG. 4  is a partially cut-away perspective view showing a coupling relationship between a light emitting module and a housing which are main parts of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention. 
     The optical semiconductor based illuminating apparatus according to the present invention may includes a housing  200  mounted with at least one light emitting module  100  including a semiconductor optical device  300 , having opened upper and lower surfaces, and enclosing an edge of the light emitting module  100 , as shown. 
     Therefore, in the case in which the light emitting module  100  malfunctions or is not operated, a worker may separate only a corresponding light emitting module  100  from the housing  200  without separating the entire apparatus due to structural characteristics of the light emitting module  100  detachably coupled to the housing  200  in a vertical direction of the housing  200 . 
     A process of separating the light emitting module  100  will be simply described. When a cover  240  to be described below is separated from the housing  200  as shown in  FIG. 1 , a light emitting module that is out of order or malfunctions among at least one light emitting modules  100  disposed between fixing plates  230  to be described below is separated from the housing  200  as shown in  FIG. 2 , thereby making it possible to perform simple repairing and replacement without extensively disassembling the entire apparatus including the housing  200 . 
     According to the present invention, the example as described above may be applied, and various examples as follows may also be applied. 
     For reference,  FIG. 5  is a perspective view showing a heat sink part and an auxiliary cover of the light emitting module which is the main part of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention;  FIG. 6  is a view viewed from the point A of  FIG. 2 ;  FIGS. 7 and 8  are views showing a process of separating a cover from an upper portion of the light emitting module which is the main part of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention, wherein  FIG. 7  is a conceptual diagram showing a state before separating the cover from the upper portion of the light emitting module; and  FIG. 8  is a conceptual diagram showing a process of separating the cover from the upper portion of the light emitting module. 
     First, the light emitting module  100  may include the semiconductor optical device  300  as described above and have a structure in which an optical cover  120  is coupled to a heat sink part  110 . 
     Here, an example in which one or more light emitting modules  100  having the same size and shape are disposed so as to be in parallel with each other in the housing  200  as shown may be applied. In addition, although not particularly shown, an example in which the light emitting modules  100  are disposed in the housing  200  while forming one or more rows and columns may also be applied. 
     In addition, when one or more light emitting modules  100  having the same size and shape are disposed so as to be in parallel with each other as shown, the light emitting modules  100  adjacent to each other or the outermost light emitting module  100  and the housing  200  are disposed so as to have a predetermined interval therebetween, thereby making it possible to promote ventilation and heat radiation effects. 
     The heat sink part  110  may have the semiconductor optical device  300  disposed thereat and be seated on a lower portion of an inner side surface of the housing  200  to discharge heat generated from the semiconductor optical device  300 , and the optical cover  120  may be detachably coupled to the heat sink part  110  along an edge of the heat sink part  110 , protect the semiconductor optical device  300 , and additionally perform a light diffusion function. 
     The heat sink part  110  may have a structure in which heat radiation fins  114  are protruded on a heat radiation plate  112 , a wiring path  116  is formed at the center of the heat radiation plate  112  on which the heat radiation fins  114  are protruded, and a connection terminal  118  electrically connected to the semiconductor optical device  300  is formed on the heat radiation plate  112  at a portion at which the wiring path  116  is formed. 
     That is, the heat radiation plate  112  has the semiconductor optical device  300  disposed thereon, both end portions seated on the housing  200 , and the optical cover  120  coupled thereto. 
     A plurality of heat radiation fins  114  may be protruded from both end portions of the heat radiation plate  112  toward the center thereof on the heat radiation plate  112  to increase a heat transfer area, thereby promoting a heat radiation effect. 
     In addition to a structure in which the heat radiation fins  114  having a simple flat panel shape are disposed at equidistance as shown, an application and a design change in which the heat radiation fins  114  having various shapes are disposed in various patterns on the heat radiation plate  112  are obvious to those skilled in the art. Therefore, an additional description thereof will be omitted. 
     The wiring path  116  is formed by a pair of partition walls  115  and  115  protruded from a central portion of the heat radiation plate  112 , and the connection terminal  118  is mounted on the heat radiation plate  112  forming the wiring path  116  to thereby be electrically connected to the semiconductor optical device  300 . 
     Here, although the case in which the wiring path  116  is formed at the center of the heat radiation plate  112  is shown in the accompanying drawings, the wiring path  116  is not necessarily disposed at the center of the heat radiation plate  112  according to a kind or an internal structure of various illuminating apparatuses. 
     Here, a plurality of heat sink parts  110  may be mounted in the housing  200  as shown, an external power supply (not shown) of the housing  200  and the connection terminal  118  may be electrically connected to each other, and the respective connection terminals  118  of the heat sink parts  110  adjacent to each other may be connected to each other by a detachable connector  117  as shown in  FIG. 6 . 
     For example, in the case in which one of the light emitting modules  100  disposed in three rows malfunctions (See  FIG. 2 ), a process of removing only the corresponding light emitting module  100 , connecting the connectors  117  formed at both of the remaining light emitting modules  110  to each other, and connecting them to the external power of the housing  200  is performed, thereby making it possible to perform emergency measures until the corresponding light emitting module  100  is replaced by a new component. 
     In addition, the heat sink part  110  may be provided with an auxiliary cover  130  having both end portions detachably coupled to first grooves  115 ′ and  115 ′ depressed in facing surfaces of the pair of partition walls  115  and  115 , respectively, to cover a lower portion of the wiring path  116 , in order to prevent accidents such as short circuit and electric shock, or the like, due to penetration of moisture, or the like, into the electric wires and the connectors  117  disposed along the wiring path  116 . 
     More specifically, the auxiliary cover  130  may have a structure in which auxiliary hooks  134  and  134  are protruded from a lower surface of a cover piece  132  covering the wiring path  116  while contacting edges of upper end portions of the partition walls  115  and  115  in a length direction of the cover piece  132  and have end portions coupled to the first grooves  115 ′ and  115 ′. 
     In addition, the auxiliary cover  130  includes the cover piece  132  manufactured corresponding to lengths of the edges of the upper end portions of the partition walls  115  and  115  of the heat sink parts  110  disposed in plural so as to cover the wiring path  116  formed by the partition walls  115  and  115 , such that a plurality of light emitting modules  100  may be managed. 
     Further, although not particularly shown, an example of a structure of the heat sink part  110  in which a plurality of heat radiation thin plates are disposed on the heat radiation plate  112  and heat pipes allowing these heat radiation thin plates and the heat radiation plate  112  to be in communication with each other is formed to increase a heat radiation effect may also be applied. 
     Meanwhile, the housing  200 , which encloses an edge of the light emitting module  100  as described above, may have a structure in which at least one light emitting module  100  is disposed between the fixing plates  230  disposed while traversing an internal space formed by an outer frame  210  coupled to both sides of a support  220 . 
     That is, the outer frame  210  serves as a partition wall enclosing the edge of the light emitting module  100 , the support  220  has the outer frame  210  slidably coupled thereto and connected to an external power supply, the fixing plates  230  have edges of both end portions fixed to facing surfaces of the outer frame  210 , respectively, and are embedded in the outer frame  210  to fix both edges of the light emitting module  100 , respectively. 
     The fixing plate  230  includes a plurality of holes  231  formed therein as shown to increase a heat transfer area, thereby making it possible to promote heat discharging in the housing  200 . 
     Meanwhile, a structure of the outer frame  210  of the housing  200  will be described in more detail with reference to a cut portion of  FIG. 4 . The outer frame  210  may have a structure in which side frames  212  are slidably coupled to both sides of the support  220 , side brackets  214  are also slidably coupled to inner sides of the side frames  212 , and both end portions of a connection frame  216  are coupled to a coupling space C formed by the side frames  212  and the side brackets  214 . 
     That is, the side frames  212  includes second grooves  211  formed in a length direction thereof and having a shape corresponding to those of fixing bars  221  protruded on both side surfaces of the support  220  and are fixed to the support  220  by sliding the second grooves  211  on the bars  221 . 
     In addition, the side bracket  214  includes fixing bars  214   a  and  214   b  which are protruded on an outer side surface thereof and have a shape corresponding to that of the bar  221 , a third groove  214   c  which is formed at an upper portion of an inner side surface thereof in the length direction, and a step  214   d  which is formed at a lower portion of the inner side surface thereof and on which an edge of the light emitting module  100  is seated, and is fixed to the side frame  212  by sliding the fixing bars  214   a  and  214   b  into the second grooves  211 . 
     Further, the connection frame  216  includes fixing pieces  216   a  and  216   b  which are protruded from both end portions thereof, respectively, and have a shape corresponding to that of the coupling space C formed by the fixing bars  214   a  and  214   b  and the second grooves  211  to connect end portions of the side frames  212  each coupled to both sides of the support  220  to each other. 
     Therefore, as described above, this coupling structure of the outer frame  210  allows a fastener such as a bolt, or the like, to be coupled from an inner side of the outer frame  210  formed by slidably coupling each component, that is, the side frames  212 , the side brackets  214 , and the connection frame  216  to each other, thereby making it possible to maintain an appearance and prevent defects such as rust generation, a crack, and the like. 
     Here, the fixing bars  214   a  and  214   b  may be protruded at upper and lower portions of the side bracket  214 , respectively, wherein the upper fixing bar  214   a  may be formed to be inclined upwardly and the lower fixing bar  214   b  may be formed to be inclined downwardly. 
     Here, the second grooves  211  of the side frame  212  are also formed to have a shape corresponding to those of the upper and lower fixing bars  214   a  and  214   b , thereby making it possible to maintain firmly fastening force of the outer frame  210  itself and also maintain durability for vertical load, shearing stress, and impact in a vertical direction in which the outer frame  210  is opened. 
     In addition, the coupling space C formed by the fixing bars  214   a  and  214   b  and the second grooves  211  may be bisected by allowing a first support protrusion  213   a  protruded from the side bracket  214  and a second support protrusion  213   b  protruded from the side frame  212  to contact each other, so as to further improve structural strength, and the fixing pieces  216   a  and  216   b  may have a shape corresponding to that of the bisected coupling space C. 
     Further, the outer frame  210  may be mounted with the cover  240  having both end portions detachably coupled to the third groove  214   c  and covering an upper portion of the light emitting module  100  in order to protect the light emitting module  100 . 
     Therefore, the cover  240  may be detachably coupled to the outer frame  210  in the vertical direction with respect to opened upper and lower portions of the outer frame  210 . 
     More specifically, the cover  240  may include connection pieces  244  extended from both end portions of a plate  242  covering the upper portion of the light emitting module  100  and bent toward the outer frame  210  and catching hooks  246  extended from end portions of the connection pieces  244  to thereby be detachably coupled to the third grooves  214   c.    
     That is, in the cover  240 , each of the connection pieces  244  extended from both end portions of the plate  242  is elastically deformed so as to approach each other or be spaced apart from each other, thereby making it possible to promote convenience for separation and fastening. 
     In addition, the cover  240  may further include step parts  243  formed at lower portions of the connection pieces  244  so as to be stepped and having upper end portions seated on edges of an upper portion of the outer frame  210 , and the catching hooks  246  may be formed at lower end portions of the step parts  243 . 
     The step parts  243  allow the connection pieces  244  to be accurately seated in the housing  200 , specifically, on the edges of the upper portion of the outer frame  210  while allowing the connection pieces  244  to be elastically deformed, thereby assisting in determining a position at which the cover  240  is accurately coupled to the housing  200 . 
     In addition, the cover  240  may further include reinforcing structures  250  protruded inwardly along connection portions between the plate  242  and the connection pieces  244 , in addition to the above-mentioned step part  243 . 
     The third grooves  214   c  allow the connection pieces  244  to be accurately seated on the housing  200 , specifically, the edges of the outer frame  210 , more specifically, edges of an upper portion of the side bracket  214  while allowing the connection pieces  244  to be elastically deformed, thereby assisting in determining a position at which the cover  240  is accurately coupled to the housing  200 . 
     The reinforcing structure  250  may serve to maintain durability for repeated elastic deformation of the connection piece  244  with respect to the plate  242  and provide a coupling space with the fixing plate  230 . 
     That is, both end portions of the reinforcing structure  250  are detachably coupled to the fixing plate  230  embedded in the housing  200  by a fastener such as a bolt, or the like, while fixing both edges of the light emitting module  100 , respectively. 
     In addition, the catching hook  246  is formed at a lower end portion of the step part  243 , and a distance from the catching hook  246  to the step part  243  corresponds to a distance from the edge of the upper end portion of the side bracket  214  to the third groove  214   c.    
     More specifically, the reinforcing structure  250  includes a hollow part  254  cut inwardly in a length direction of a body  252  protruded from the connection portion between the plate  242  and the connection piece  244  and formed in a cylindrical shape at the center of the body  252 . 
     Here, the hollow part  254  of the body  252  may be expanded or contracted according to the elastic deformation of the connection piece  244 . 
     Therefore, when a worker applies force in a direction of an arrow as transparently shown in  FIG. 7  in order to separate the cover  240 , the cover  240  may be easily separated upwardly of the light emitting module  100  as shown in  FIG. 8 . 
     In addition to the method of separating the cover  240  as described above, although not particularly shown, an example in which the worker simultaneously applies force from both sides of the cover  240  to separate the cover  240  upwardly of the light emitting module  100  may also be applied. 
     Meanwhile, the optical semiconductor based illuminating apparatus according to the present invention may have a structure in which at least one light emitting module  100  including a semiconductor optical device  500  (See  FIG. 11 ) is mounted in a housing  200 , both end portions of a cover  300  are detachably coupled to facing edges of the housing, respectively, while being deformed, so as to cover an upper portion of the light emitting module  100 , and the cover  300  is provided with vent units  400  to discharge heat generated from the light emitting module  100  as shown in  FIG. 9 . 
     Therefore, the worker may easily separate the cover from the housing  200  due to structural characteristics of the cover  300  capable of being deformed even through slight force is applied from one side of the cover  300  to the cover  300 . 
     In addition, the vent unit  400  may improve heat radiation performance simultaneously with preventing introduction of foreign materials. 
     According to the present invention, the example as described above may be applied, and various examples as follows may also be applied. 
     First, the light emitting module  100  has a structure in which a heat sink part  110  including the semiconductor optical device  500  is covered by an optical cover  120  as shown in a portion cut in  FIG. 9 . 
     In the housing  200  in which the light emitting module  100  is embedded as described above, the light emitting modules  100  are mounted between a side frame  212  and fixing plates  230 , and both end portions of a cover  300  to be described below are detachably coupled to third grooves  214   c.    
     The side frame  212  serves as a partition wall enclosing an edge of the light emitting module  100 . 
     The third grooves  214   c  are formed at an upper portion of an inner side surface of the side frame  212  so as to correspond to both end portions of the cover  300 . 
     The fixing plates  230  are embedded in the side frame  212  so as to be perpendicular to a direction in which the third groove  214   c  are formed to fix both edges of the light emitting modules  100 , respectively. 
     The fixing plates  230  are formed with a plurality of holes to increase a heat transfer area, thereby making it possible to improve a heat radiation effect in the housing  200 . 
     The cover  300  has a structure in which both edges thereof contact facing edges of the fixing plates  230  exposed upwardly of the side frame  212 . 
     Here, an upper end portion of the housing  200  may be provided with the third grooves  214   c  to which the cover  300  is detachably coupled and a lower end portion thereof may be provided with the side bracket  214  on which the edge of the light emitting module  100  is seated and which is coupled to an inner side surface of the side frame  212 . 
     Meanwhile, the cover  300 , which covers the upper portion of the light emitting module  100  as described above, has a structure in which connection pieces  320  are extended from both end portions of a plate  310  covering the upper portion of the light emitting module  100  and bent toward the housing  200  to thereby be elastically deformed so as to approach each other or be spaced apart from each other while facing each other, and catching hooks  330  are extended from end portions of the connection pieces  320  to thereby be detachably coupled to an upper portion of an inner side surface of the housing  200 , that is, the third grooves  214   c , as shown in  FIG. 10 . 
     Here, the cover  300  may further include steps  322  formed at lower portions of the connection pieces  320  so as to be stepped and having an upper end portion seated on edges of an upper portion of the housing  200 , more specifically, edges of an upper portion of the side bracket  214  and reinforcing structures  340  protruded inwardly along connection portions between the plate  310  and the connection pieces  320 . 
     The steps  322  allow the connection pieces  320  to be accurately seated on the housing  200 , specifically, the edges of the side frame  212 , more specifically, the edges of the upper portion of the side bracket  214  while allowing the connection pieces  320  to be elastically deformed, thereby assisting in determining a position at which the cover  300  is accurately coupled to the housing  200 . 
     The reinforcing structure  340  may serve to maintain durability for repeated elastic deformation of the connection piece  320  with respect to the plate  310  and provide a coupling space with the fixing plate  230 . 
     That is, both end portions of the reinforcing structure  340  are detachably coupled to the fixing plate  230  embedded in the housing  200  by a fastener such as a bolt, or the like, while fixing both edges of the light emitting module  100 , respectively, the catching hook  330  is formed at a lower end portion of the step  322 , and a distance from the catching hook  330  to the step  322  corresponds to a distance from the edge of the upper end portion of the side bracket  214  to the third groove  214   c.    
     More specifically, the reinforcing structure  340  is cut inwardly in a length direction of a body  342  protruded from the connection portion between the plate  310  and the connection piece  320 , wherein the body  342  has a hollow part  344  formed at the center thereof and having a cylindrical shape. 
     Here, the hollow part  344  of the body  342  may be expanded or contracted according to the elastic deformation of the connection piece  320 . 
     Therefore, when a worker applies force in a direction of an arrow as transparently shown in  FIG. 11  in order to separate the cover  300 , the cover  300  may be easily separated upwardly of the light emitting module  100  as shown in  FIG. 12 . 
     In addition to the method of separating the cover  300  as described above, although not particularly shown, an example in which the worker simultaneously applies force from both sides of the cover  300  to separate the cover  300  upwardly of the light emitting module  100  may also be applied. 
     Meanwhile, the cover  300  may serve to cover the upper portion of the light emitting module  100  and prevent introduction of foreign materials as described above and be provided with at least one groove  350  depressed from a lower end portion of the connection piece  320  provided at one side of the plate  310  up to a lower end portion of the connection piece  320  provided at the other side of the plate  310  as shown in  FIG. 13 . 
     Here, the groove  350  may also be used in order to induce discharging of moisture in rainy weather. 
     Although not shown in detail in  FIG. 13 , the groove  350  may be inclined downwardly from the center of the plate  301  toward the connection pieces  320  of both sides thereof, thereby making it possible to improve a drain effect. 
     Further, although not particularly shown, the cover  300  may further have an inclination surface formed by bending the plate  310  so as to be gradually inclined downwardly from the center of the plate  310  toward the connection pieces  320  of both sides thereof in order to improve the drain effect. 
     Meanwhile, the cover  300  may be further provided with vent units  400  for discharging heat generated from the light emitting module  100  as shown in  FIG. 13 . 
     In the cover  300 , the vent units  400 , more specifically, vent holes  410  to be described below may be formed so as to be in parallel with each heat radiation fin in a direction in which a plurality of heat radiation fins configuring the heat sink part  110  are disposed as shown in  FIGS. 9 to 12 . Alternatively, an example in which vent holes  410  to be described below are formed in a direction perpendicular to the heat radiation fins as shown in  FIGS. 13 to 15  may also be applied. 
     For reference, an arrow represented by a curved line indicates a movement direction of air. 
     Here, an example of a structure in which the vent unit  400  includes the vent holes  410  (See an enlarged portion of  FIG. 10  and  FIGS. 14 and 15 ) formed at equidistance so as to penetrate through the plate  310  of the cover  300  covering the upper portion of the light emitting module  100  may be applied. 
     Here, the vent holes  410  may have any area that is in the range of 1 to 90% of an area of the plate  310  and be disposed in various patterns. 
     Meanwhile, the vent unit  400  may further include a vent guide  420  extended from an edge of one side of the vent hole  410  upwardly of the plate  310  to cover an upper portion of the vent hole  410  and having an outlet  422  provided at the other side thereof, in order to block introduction of foreign materials from the outside while performing a heat radiation function, as shown. 
     Here, specifically, an example in which the vent holes  410  penetrate through the plate  310  in a slit shape (it may be inferred from a shape of the vent guide  420  that although not shown in  FIGS. 9 to 12 , the vent hole  410  has a slit shape in which a length thereof is larger than a width thereof) so as to be in parallel with the plurality of heat radiation fins protruded from the heat sink part  110  configuring the light emitting module  100  and disposed at equidistance may be applied. 
     Here, an example in which the vent holes  410  penetrates through the plates  310  at positions corresponding to positions at which the semiconductor optical devices  500  are disposed as shown in  FIG. 12  may be applied. 
     In addition, an example in which the vent holes  410  penetrate through the plate  310  in a slit shape so as to be perpendicular to a plurality of heat radiation fins  122  protruded from the light emitting module and disposed at equidistance may also be applied, as shown in  FIG. 13 . 
     Here, an edge of the outlet  422  side of the vent guide  420  may be disposed on a virtual straight line l extended in a direction perpendicular to an edge of the other side of the vent hole  410 , as shown in  FIG. 14 . 
     Meanwhile, an example in which the edge of the outlet  422  side of the vent guide  420  passes through the virtual straight line l extended in the direction perpendicular to the edge of the other side of the vent hole  410  and is then extended to the plate  310  in the vicinity of the edge of the other side of the vent hole  410  as shown in  FIG. 15  may also be applied. 
     Meanwhile,  FIG. 16  is a plan view showing a state in which the cover of the housing is omitted in the illuminating apparatus so that the rear of the light emitting module may be viewed; and  FIG. 17  is a partially cut-away view of a distributor shown in  FIG. 16 . 
     The optical semiconductor based illuminating apparatus according to the present invention may include a plurality of light emitting modules  100  having the structure as described above. 
     As shown in  FIGS. 16 and 17 , the illuminating apparatus includes a box type support frame  220  and an outer frame  210  coupled to the box type support frame  220 . 
     An inner portion of the outer frame  210  is provided with a space in which the plurality of light emitting modules  100 ,  100 , and  100  are disposed so as to be in parallel with each other. 
     An inner portion of the support frame  220  may be provided with a power supply  400  (hereinafter, a switching mode power supply (SMPS) such as the SMPS. 
     The SMPS  400  is connected to an alternate current (AC) power line led from the outside in a state in which it is positioned in the support frame  220 . 
     Each light emitting module  100  includes a heat sink  110  having a plurality of plate shaped heat radiation fins  118  formed integrally therewith at a side opposite to a side at which light is emitted. 
     The center of each heat sink  100  is provided with a cable path  119  in which the heat radiation fins  118  are not formed. 
     The cable paths  119  of each of the plurality of light emitting modules  100  are connected to each other at the rear of the heat sinks  110 . 
     The cable paths  119  of all of the light emitting modules  100  are connected to each other at the rear of the heat sinks  110  to form a single long cable path. 
     According to the exemplary embodiment of the present invention, a distributor  500  receiving direct current (DC) power through a main power line extended from an output terminal of the SMPS  400  and distributing the DC power to the plurality of light emitting modules  100  is provided. 
     Referring to  FIGS. 16 and 17 , the distributor  500  includes a distributor body  510 , an external cable jacket  520 , and a plurality of distribution cables  530   a ,  530   b , and  530   c.    
     The distributor body  510  is connected to the main power line  501  at one side thereof and is connected integrally with the external cable jacket  520  at the other side thereof. 
     In addition, the plurality of distribution cables  530   a ,  530   b , and  530   c  are installed so as to be led from the other side of the distributor body  510 . 
     Here, the plurality of distribution cables  530   a ,  530   b , and  530   c  pass through the external cable jacket  520  by a predetermined length section when or before they are led from the distributor body  510 . 
     The external cable jacket  520  encloses the plurality of distribution cables  530   a ,  530   b , and  530   c  in a state in which they are connected integrally with the distributor body  510 . 
     Therefore, the plurality of distribution cables  530   a ,  530   b , and  530   c  are enclosed by the external cable jacket  520  by a predetermined length from the distributor body  510 , such that they are not exposed to the outside. 
     The plurality of distribution cables  530   a ,  530   b , and  530   c  have different lengths so as to be connected to the light emitting modules  100 ,  100 , and  100  disposed at different positions. 
     The plurality of distribution cables  530   a ,  530   b , and  530   c  include connectors  531   a ,  531   b , and  531   c  provided at a distal end thereof in order to be electrically connected to the light emitting modules  100 ,  100 , and  100 . 
     The distributor body  510  is positioned in the box type support frame  200 . 
     The external cable jacket  520  is disposed to penetrate through a partition wall partitioning the box type support frame  200  and an installation space (hereinafter, referred to as a ‘light emitting module space’) of the light emitting modules  100 , for example, the fixing plate  230  according to the present embodiment. 
     A through-hole of the partition wall is installed with a cable gland  502  to which the external cable jacket  520  is assembled. 
     The distribution cables  530   a ,  530   b , and  530   c  are led from the external cable jacket  520  in the light emitting module space and connected to the light emitting modules  100 ,  100 , and  100  disposed at different positions, respectively. 
     Since the external cable jacket  520  covers the distribution cables  530   a ,  530   b , and  530   c  in a sealing structure in a predetermined length section, particularly, a predetermined length section in an environment requiring waterproofing, a risk such as disconnection, or the like, due to penetration of moisture may be blocked in advance. 
     As shown in  FIG. 17 , the distributor body  510  includes a power distribution printed circuit board (PCB)  511  and a molding part  512  formed to cover the entire power distribution PCB  511 . 
     One end portion of the external cable jacket  520  is positioned in the molding part  512  to thereby be protected from the outside. 
     In addition, the power distribution PCB  511  has positive (+) and negative (−) terminals connected to the main power line  501  and positive (+) and negative (−) terminals connected to the distribution cables  530   a ,  530   b , and  530   c  and includes a parallel circuit pattern formed therebetween. 
     The distribution cables are integrated in the external cable jacket  520  within the molding part  512  of the distributor body  510 . 
     As described above, the main power line  501  may be connected to the SMPS  400  which is a power supply converting external AC power into DC power. 
     In this case, the main power line  501  distributes the DC power from the SMPS  400  to the plurality of light emitting modules. 
     The external cable jacket  520  has flexibility so as to avoid interference with other components. 
     For example, in the case in which a large apparatus or component such as the SMPS is installed in the support frame  220 , the external cable jacket  520  may be disposed to be flexed so as to avoid interference with this large component. 
       FIG. 18  is a diagram describing an illuminating apparatus according to another exemplary embodiment of the present invention. 
     According to the above-mentioned embodiment described with reference to  FIG. 16 , the SMPS  400  is positioned inside the support frame  220  which is a portion of the housing. 
     On the other hand, in the illuminating apparatus according to the present embodiment, the SMPS  400  is positioned outside the housing of the illuminating apparatus, as shown in  FIG. 18 . 
     The DC power converted from the AC power by the SMPS  400  positioned outside the housing is supplied to the distributor  500  positioned inside the support frame  220  of the housing through the main power line  501 . 
     Since other configurations are the same as those of the above-mentioned embodiment, a description thereof will be omitted in order to avoid overlap. 
     Meanwhile, in the present invention, an example of a structure in which an SMPS  620  mounted in the support  220  of the housing  200  may be fixed corresponding to various shapes and sizes of the SMPS  620  as shown in  FIGS. 19 to 22  may also be applied. 
     For reference,  FIG. 19  is a conceptual diagram showing a coupling relationship between a bracket and an SMPS which are main parts of the optical semiconductor based illuminating apparatus according to the exemplary embodiment of the present invention;  FIG. 20  is a cross-sectional view viewed from the point X of  FIG. 19 ; and  FIGS. 21 and 22  are partially exploded perspective views showing a state in which the SMPS is coupled to a fixture which is a main part of the optical semiconductor based illuminating apparatus according to various exemplary embodiments of the present invention. 
     A pair of rails  610  is formed on an inner surface of a support  220 , the SMPS  620  is disposed at an upper portion of the rail  610 , and a bracket  630  has both end portions reciprocating along the pair of rails  610  and fixes the SMPS  620 . 
     Here, the support  220  configuring the housing  200  may further include a seat jaw  615  disposed between the pair of rails  610  and having the SMPS  620  seated thereon. 
     The seat jaw  615  is to provide an area allowing the SMPS  620  to be stably disposed. 
     Here, it may be appreciated from  FIG. 20  that the rails  610  are formed along both edges of the seat jaw  615 . 
     Meanwhile, the bracket  630  will be described in detail. The bracket  630  includes a first piece  631  contacting an upper surface of the SMPS  620 , second pieces  632  extended from both end portions of the first piece  631 , respectively, and third pieces  633  extended from end portions of the second pieces  632 , respectively, to contact the rails  610 . 
     In addition, the bracket  630  may further include at least one bolt  635  detachably coupled to the first piece  631  to contact or be spaced apart from the upper surface of the SMPS  620 , in order to move the SMPS  620  along the rails  610  in accordance with a length of the SMPS  610  and then certainly fix the SMPS  620 . 
     Further, the housing  200  may further include fixtures  640  formed on an inner surface of the support  220  thereof, more specifically, on the seat jaw  615  and fixing both sides of one end portion of the SMPS  620 . 
     Here, the fixture  640  may have a structure in which it includes a pair of blocks  641  detachably coupled to the inner surface of the support  220  and having a shape corresponding to those of cut parts  621  formed at both sides of one end portion of the SMPS  620 , respectively, as shown in  FIG. 21 . 
     In addition, the fixture  640  may also have a structure in which it includes fourth pieces  644  that are in parallel with the inner surface of the support  220  and disposed at both sides of one end portion of the SMPS  620 , respectively, and blocking walls  645  extended to an inner side surface of the support  220  along two edges of the fourth pieces  644  meeting each other and contacting both sides of one end portion of the SMPS  620 , as shown in  FIG. 22 . 
     As described above, it may be appreciated that a basic technical spirit of the present invention is to provide the optical semiconductor based illuminating apparatus capable of promoting convenience for checking and repairing, simply performing separation and fastening, having excellent waterproofing characteristics and durability, preventing accidents such as short circuit and electric shock improving heat radiation performance, preventing introduction of foreign materials, being easily cleaned and maintained, reliably providing power of a main power line to a plurality of light emitting modules, and utilizing a space and securing reliability of a product regardless of a size and a shape of a power supply embedded therein. 
     According to the present invention having the configuration as described above, the following effects may be accomplished. 
     First, according to the present invention, at least one light emitting module is detachably coupled to the housing having opened upper and lower surfaces and enclosing the edge of the light emitting module in the vertical direction of the housing, such that the separation and the fastening between the light emitting module and housing may be simply performed and action may be instantly taken at the time of generation of a fault or a malfunction, thereby making it possible to provide convenience to a worker at the time of checking and repairing by the worker. 
     In addition, according to the present invention, the wiring path is formed at the center of the heat sink part, and the auxiliary cover detachably coupled to the wiring path to cover the wiring path and the cover detachably coupled to the housing to cover the upper portion of the light emitting module embedded in the housing are provided, thereby making it possible to maintain waterproofing characteristics and air tightness and prevent accidents such as short circuit and electric shock. 
     Further, according to the present invention, the electrical connection is made by the connector capable of being detachably coupled to the semiconductor optical device disposed at the heat sink part along the above-mentioned wiring path, and the respective light emitting modules are also electrically connected to each other by this connector, such that even though a fault occurs in any one of the plurality of light emitting modules, a function of the illuminating apparatus may be sufficiently performed using the remaining light emitting modules. 
     In addition, according to the present invention, the cover detachably coupled to the housing while being elastically deformed is provided, thereby making it possible to easily check and repair internal components of the apparatus. 
     Further, according to the present invention, the cover covering the upper portion of the light emitting module is provided with the vent unit, thereby making it possible to improve heat radiation performance, preventing introduction of foreign materials, and easily perform cleaning and maintenance. 
     In addition, according to the present invention, the distributor in which the plurality of distribution lines are led and branched from the distributor body in which waterproofing or air tightness are ensured in a state in which they are sealed and integrated by a predetermined length section, thereby making it possible to reliably provide the power of the main power line to the plurality of light emitting modules. 
     Further, according to the present invention, the bracket having both end portions reciprocating along the pair of rails so as to fix the SMPS disposed at the upper portion of the pair of rails formed on the inner surface of the support is provided to be actively adapted for various sizes and shapes of the SMPS embedded in the illuminating apparatus, thereby making it possible to secure generality. 
     In addition, various modifications and applications may be made by those skilled in the art without departing from the scope of the basic technical spirit of the present invention.