Patent Publication Number: US-2022214032-A1

Title: Lamp assembly, lamp system, method for assembling lamp system, and method for disassembling lamp system

Description:
RELATED APPLICATIONS 
     This application is a continuation application of International Application No. PCT/CN2021/119154 filed on Sep. 17, 2021 which claims priority to International Application No. PCT/CN2020/116307 filed on Sep. 18, 2020. The entire disclosures of all the above applications are hereby incorporated by reference. 
    
    
     BACKGROUND 
     Field of Invention 
     The present disclosure relates to a light-emitting device, and more particularly, to a lamp assembly, a lamp system, a method for assembling a lamp system, and a method for disassembling a lamp system. 
     Description of Related Art 
     In response to market demand, the variations of lamps are becoming more and more diverse. There is a pendant transparent lamp, which can achieve lighting and aesthetic effects at the same time. 
     However, most of the typical pendant lamps use cables as power connections. If various pendant hanging lamps are used at the same time, each detached pendant lamp needs to be powered through its own cable to emit light. The exposed cables increase the complexity of assembly, increase costs, and lead to cluttered visual effects in the space. 
     When several lamps are required to be connected in series, although only one single cable is required, it will result in a higher system cost because an appropriate number of lamps and lamp intervals cannot be used. If a track system is used to connect several lamps in series, there will be a disadvantage that track construction costs for the track system is expensive. In addition, when the lamp itself needs to expand other non-main lighting functions and needs to be connected to external devices, a problem of integration difficulty arises due to a factor of an outer frame of the lamp. 
     SUMMARY 
     Therefore, one object of the present disclosure is to provide a lamp assembly that can be rapidly assembled and disassembled, thereby effectively saving system construction costs. 
     According to the aforementioned objectives of the present disclosure, a lamp assembly is provided. The lamp assembly includes a lamp and a connector assembly. The lamp includes a frame body, a light source assembly, and an electrical connector assembly. The frame body has an accommodating space. The light source assembly is fixed on the frame body. The electrical connector assembly is disposed in the accommodating space and is connected to the light source assembly, in which the electrical connector assembly includes a first connector and a second connector, and the first connector and the second connector are connected to each other by a power wire and a signal wire. The connector assembly includes an electrical connecting member, in which the connector assembly is configured to be connected to the lamp and another lamp by the electrical connecting member. 
     According to one embodiment of the present disclosure, the electrical connecting member of the connector assembly includes a third connector and a fourth connector, and the third connector and the fourth connector are connected to each other by another power wire and another signal wire. The third connector of the connector assembly is electrically and signally connected to the second connector of the lamp, and the fourth connector is electrically and signally connected to the another lamp. 
     According to one embodiment of the present disclosure, the connector assembly further includes an external terminal which is connected between the third connector and the fourth connector, and the external terminal is electrically and signally connected to an external device. 
     According to one embodiment of the present disclosure, the lamp has a length L, and the connector assembly has a length P, in which the length L of the lamp and the length P of the connector assembly satisfy the following conditions: 
     
       
         
           
             
               
                 
                   - 
                   8 
                 
                 ⁢ 
                 
                   P 
                   2 
                 
               
               + 
               
                 6 
                 ⁢ 
                 L 
                 × 
                 P 
               
               - 
               
                 
                   0 
                   . 
                   9 
                 
                 ⁢ 
                 
                   L 
                   2 
                 
               
             
             &gt; 
             
               0 
               . 
             
           
         
       
     
     According to one embodiment of the present disclosure, the lamp is hung obliquely above a target object, and an included angle θ is defined between a line connecting a bottom of the lamp and a top of the target object and a vertical line, in which the length L of the lamp, and the length P of the connector assembly, and the included angle θ satisfy the following conditions: 
     
       
         
           
             
               
                 1 
                 8 
               
               ⁢ 
               tan 
               ⁢ 
               
                   
               
               ⁢ 
               θ 
             
             &lt; 
             
               
                 
                   - 
                   8 
                 
                 ⁢ 
                 
                   P 
                   2 
                 
               
               + 
               
                 6 
                 ⁢ 
                 L 
                 × 
                 P 
               
               - 
               
                 
                   0 
                   . 
                   9 
                 
                 ⁢ 
                 
                   L 
                   2 
                 
               
             
             &lt; 
             
               
                 1 
                 2 
               
               ⁢ 
               tan 
               ⁢ 
               
                   
               
               ⁢ 
               
                 θ 
                 . 
               
             
           
         
       
     
     According to one embodiment of the present disclosure, the connector assembly includes a casing and a bottom cover. The casing has an inner space, and the bottom cover is configured to open or close the inner space. The electrical connecting member is disposed in the inner space. 
     According to one embodiment of the present disclosure, the light source assembly includes a light-emitting unit and a light guide plate, in which the light-emitting unit is disposed in the accommodating space, the light guide plate is connected to the frame body, and a light incident surface of the light guide plate is adjacent to the light-emitting unit. 
     According to one embodiment of the present disclosure, the lamp assembly further includes a supporting member, in which a top surface of the lamp and a top surface of the connector assembly respectively have a groove, one portion of the supporting member is embedded in the groove of the lamp, and the other portion of the supporting member is embedded in the groove of the connector assembly. 
     According to one embodiment of the present disclosure, the lamp and the connector assembly respectively have a suspension member. 
     According to the aforementioned objectives of the present disclosure, a lamp system is further provided. The lamp system includes at least two lamps of and at least one connector assembly of the aforementioned lamp assembly. 
     According to one embodiment of the present disclosure, the first connector of an endmost one of the lamps is connected to an external power source. The electrical connector assembly of each of the rest of the lamps is connected to the electrical connecting member of its adjacent connector assembly so as to form a connection with the endmost one of the lamps. 
     According to the aforementioned objectives of the present disclosure, a method for assembling a lamp system is further provided, which includes the following steps. The aforementioned lamp system is provided. The suspension members located on two opposite ends of a main lamp of the lamps are hanged to a ceiling, in which the first connector of the electrical connector assembly of the main lamp is connected to an external power source. A first end of the connector assembly is electrically and signally connected to the second connector of the main lamp, and a suspension member located on a second end of the connector assembly is hanged to the ceiling. The first connector of a secondary lamp of the lamps is electrically and signally connected to the second end of the connector assembly, and a suspension member located on an end of the secondary lamp away from the connector assembly is hanged to the ceiling. 
     According to the aforementioned objectives of the present disclosure, a method for disassembling a lamp system is further provided, which includes the following steps. The aforementioned lamp system is provided. The electrical connector assembly of one of the lamps of the lamp system desired to be disassembled is separated from the electrical connecting member of the connector assembly, in which one end of the one of the lamps is fixed by the suspension member. The suspension member and the one of the lamps is separated to remove the one of the lamps. 
     It can be known from the above that the lamp system of the present disclosure mainly uses the design of the electrical connecting members of the connector assembly and the lamp to achieve an electric and signal transmission function required for the jump connection and function expansion of the lamps, thereby effectively saving the system cost, and completing the electrical connection between lamps or between the lamps and external devices in a simple installation method. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The invention can be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows: 
         FIG. 1  is a schematic structural diagram showing a lamp system in accordance with an embodiment of the present disclosure; 
         FIG. 2  is a schematic block diagram showing a lamp system in an assembled state in accordance with an embodiment of the present disclosure; 
         FIG. 3  is an enlarged view of zone “A” in  FIG. 1 ; 
         FIG. 4  is an enlarged view of zone “B” in  FIG. 1 ; and 
         FIG. 5  is a schematic diagram showing a lamp system in a usage state in accordance with an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Referring to  FIG. 1  and  FIG. 2 ,  FIG. 1  is a schematic structural diagram showing a lamp system  100  in accordance with an embodiment of the present disclosure, and  FIG. 2  is a schematic block diagram showing the lamp system  100  in an assembled state in accordance with an embodiment of the present disclosure. The lamp system  100  of the present embodiment mainly includes at least two lamps (such as a lamp  200  and a lamp  300 ) and at least one connector assembly  400 . It is noted that, the lamp  200  and the lamp  300  have substantially the same structures, and the same reference numbers used in the drawings and the description are referred to the same or like parts. The lamp  200  and the lamp  300  are connected in series by the connector assembly  400 . 
     Simultaneously referring to  FIG. 2  to  FIG. 4 , in which  FIG. 3  is an enlarged view of zone “A” in  FIG. 1 , and  FIG. 4  is an enlarged view of zone “B” in  FIG. 1 . The lamp  200  (or lamp  300 ) includes a frame body  210 , a light source assembly  220 , and an electrical connector assembly  230 . The frame body  210  has an accommodating space  211 . The light source assembly  220  is fixed on the frame body  210 . In one embodiment, the light source assembly  220  includes a light-emitting unit (not shown) and a light guide plate  221 , in which the light-emitting unit is a LED bar which is disposed in the accommodating space  211  of the frame body  210 . A portion of the light guide plate  221  near a light-incident surface is located in the accommodating space  211 , and the light-emitting unit is disposed adjacent to the light-incident surface of the light guide plate  221  and is used to provide light to the light guide plate  221 . 
     Referring to  FIG. 2  to  FIG. 4 , in the present embodiment, the electrical connector assembly  230  is disposed in the accommodating space  211  of the frame body  210  and is electrically and signally connected to the light source assembly  220 . The electrical connector assembly  230  includes a first connector  231  and a second connector  232 , and the first connector  231  and the second connector  232  are connected to each other by a power wire and a signal wire. In one example, the first connector  231  and the second connector  232  are connected to each other by two power wires, two signal transmissions and a grounding wire. It is noted that, signal transmission in the present disclosure can be implemented according to a Digital Addressable Lighting Interface (DALI) standard, a Power Line Communication (PLC) standard, a Controller Area Network (CAN) standard, RS-485 standard, DMX, I2C, RS-232, Ethernet, exclusive protocol or other protocols known by those skilled in the art as a transmission manner. According to the above-mentioned framework, multiple control signals can be communicated by, for example, a private, a shared, and/or dedicated communication network, such as DALI or DMX, to control the lamp  200  or adjust the lamp  200  (or lamp  300 ) to open or close, or to adjust the brightness, the color temperature, the flickering mode or other functions of the lamp  200  (or lamp  300 ). As shown in  FIG. 2 , the first connector  231  is connected to the light source assembly  220 , and there is a driver  240  disposed between the first connector  231  and the light source assembly  220 . The driver  240  is configured to convert the alternating current (AC) to direct current (DC) which can be used by the light source assembly  220 . 
     In the present embodiment, the first connector  231  and the second connector  232  are disposed in the accommodating space  211  of the frame body  210  and are respectively located at two opposite ends of the frame body  210 . The first connector  231  and the second connector  232  of the lamp  200  (or lamp  300 ) are electrically and signally connected to their adjacent connector assembly  400  respectively. More specifically, the connector assembly  400  has opposing first end  401  and second end  402 . The lamp  200  is disposed adjacent to the first end  401  of the connector assembly  400  and is electrically and signally connected to the connector assembly  400 . The lamp  300  is disposed adjacent to the second end  402  of the connector assembly  400  and is electrically and signally connected to the connector assembly  400 . 
     Referring to  FIG. 2  to  FIG. 4 , the connector assembly  400  includes a casing  410 , a bottom cover  420  and an electrical connecting member  430 . As shown in  FIG. 4 , the casing  410  has an inner space  411 . The electrical connecting member  430  is disposed in the inner space  411  of the casing  410 . As shown in  FIG. 2 , the electrical connecting member  430  includes a third connector  431  and a fourth connector  432 , and the third connector  431  and fourth connector  432  are connected to each other by a power wire and a signal wire. In the present embodiment, the third connector  431  is located at the first end  401  of the connector assembly  400 , and the fourth connector  432  is located at the second end  402  of the connector assembly  400 . When the lamp  200  is connected to the first end  401  of the connector assembly  400 , the accommodating space  211  of the frame body  210  of the lamp  200  is communicated with the inner space  411  of the casing  410  of the connector assembly  400 . Moreover, when the lamp  300  is connected to the second end  402  of the connector assembly  400 , the accommodating space  211  of the frame body  210  of the lamp  300  is communicated with the inner space  411  of the casing  410  of the connector assembly  400 . Meanwhile, the second connector  232  of the lamp  200  is electrically and signally connected to the third connector  431  at the first end  401  of the connector assembly  400 , and the first connector  231  of the lamp  300  is electrically and signally connected to the fourth connector  432  at the second end  402  of the connector assembly  400 . 
     As shown in  FIG. 2 , in one embodiment, the connector assembly  400  further includes an external terminal  440 . The external terminal  440  is connected between the third connector  431  and the fourth connector  432 , and the external terminal  440  is configured to be connected with an external device A 1 . In some embodiments, the external terminal  440  may be disposed in the inner space  411  of the casing  410  of the connector assembly  400 , or may extend outside of the casing  410  of the connector assembly  400 . In some examples, the external device A 1  can be a device with non-lighting functions. For example, the external device A 1  can be a speaker device, an emergency exit light, hanging placard device, monitoring device, or rechargeable battery, etc. In other examples, the external device A 1  can be a device with an environmental sensing function. For example, the external device A 1  can be an environment sensor, a motion sensor, or a color sensor, etc. Before the external device A 1  is installed to the connector assembly  400 , the bottom cover  420  is first removed from the casing  410 . Thereafter, the external device A 1  is connected to the external terminal  440  of the connector assembly  400 , and the bottom cover  420  is then mounted to the casing  410 . 
     Referring to  FIG. 3  and  FIG. 4  again, in the present embodiment, the lamp  200  includes a supporting member M 1 , and the lamp  300  includes a supporting member M 2 . Top portions of the lamp  200  and the lamp  300  respectively have a groove  212 , and top portion of the casing  410  of the connector assembly  400  also has a groove  412 . When the lamp  200  is connected to the first end  401  of the connector assembly  400 , one portion of the supporting member M 1  is embedded in the groove  212  on the frame body  210  of the lamp  200 , and the other portion of the supporting member M 1  is embedded in the groove  412  on the casing  410  of the connector assembly  400  and is near the first end  401 . Similarly, When the lamp  300  is connected to the second end  402  of the connector assembly  400 , one portion of the supporting member M 2  is located in the groove  212  on the frame body  210  of the lamp  300 , and the other portion of the supporting member M 2  is located in the groove  412  of the connector assembly  400  and is near the second end  402 . 
     Referring to  FIG. 1  to  FIG. 4 , the present disclosure further provides a method for assembling a lamp system. The method mainly includes the following steps. At first, at least two aforementioned lamps, such as the lamp  200  and the lamp  300 , and a connector assembly  400  are provided. In the present embodiment, the lamp  200  is used as a main lamp, and the lamp  300  is used as a secondary lamp. Thereafter, two opposing sides of the main lamp  200  are fixed to the ceiling by respectively using a suspension member R 1 , and the first connector  231  of the electrical connector assembly  230  on the main lamp  200  is connected to an external power source P 1  through a power wire P 11 . In the present embodiment, the external power source P 1  is an AC power source. Then, the third connector  431  on the first end  401  of the connector assembly  400  is electrically connected to the second connector  232  of the main lamp  200 , and the second end  402  of the connector assembly is fixed to the ceiling through the suspension member R 2 . As shown in  FIG. 3 , before the connector assembly  400  is connected to the main lamp  200 , the supporting member M 1  is inserted into the groove  212  on the frame body  210  of the main lamp  200 . Therefore, when the connector assembly  400  is mounted on the lamp  200 , one portion of the supporting member M 1  is embedded in the groove  212  on the frame body  210  of the lamp  200 , and the other portion of the supporting member M 1  is embedded in the groove  412  on the casing  410  of the connector assembly  400 , thereby increasing an engagement stability between the lamp  200  and the connector assembly  400 . 
     After the connector assembly  400  is connected to the main lamp  200 , the first connector  231  of the secondary lamp  300  is connected to the fourth connector  432  on the second end  402  of the connector assembly  400 , and an end of the secondary lamp  300  away from the connector assembly  400  is fixed to the ceiling through the suspension member R 3 , so as to finish the installation of the lamp system  100 . As shown in  FIG. 4 , before the secondary lamp  300  is connected to the connector assembly  400 , the supporting member M 2  is inserted into the groove  412  on the casing  410  of the connector assembly  400 . Therefore, when the secondary lamp  300  is mounted on the connector assembly  400 , one portion of the supporting member M 2  is embedded in the groove  412  on the casing  410  of the connector assembly  400 , and the other portion of the supporting member M 2  is embedded in the groove  212  on the frame body  210  of the lamp  300 , thereby increasing an engagement stability between the lamp  300  and the connector assembly  400 . 
     In the present embodiment, the lamp is a first lamp (i.e., the endmost lamp) which is connected to the external power source P 1 . Therefore, the power provided by the external power source P 1  which is transmitted from the electrical connector assembly  230  of the lamp  200  to the connector assembly  400  can be further transmitted from the electrical connecting member  430  of the connector assembly  400  to the lamp  300 , thereby electrically connecting the lamp  200 , the connector assembly  400  and the lamp  300  together. If there are another connector assembly and another lamp to be connected to the lamp  300 , the power transmitted to the lamp  300  can be further transmitted to the another connector assembly or the another lamp by the electrical connector assembly  230  of the lamp  300 . Therefore, only one external power source is used to provide power for multiple lamps and connector assemblies instead of setting up multiple external power sources on each lamp or each connector assembly, thereby forming a lamp system with simple wiring structure as well as easy-to-assemble and time-saving advantages. In some embodiments, when the function of the lamp system  100  needs to be expanded, it is only necessary to connect the external device A 1  to the external terminal  440  of the connector assembly  400 , and no additional external power source or wires need to be used. 
     In other embodiments, when there is only one lamp  200 , two suspension member R 1  are respectively disposed on two opposing ends of the lamp  200  so as to be fixed on the ceiling. When the function of the lamp system  100  needs to be expanded, the aforementioned method for assembling the lamp system can be used to connect the connector assembly  400  and the lamp  300  to the lamp  200 , and only one suspension member R 2  is needed to be disposed on one end (i.e., second end  402 ) of the connector assembly  400  away from the lamp  200 , in which the other end (i.e., first end  401 ) of the connector assembly  400  adjacent to the lamp  200  shares a bearing load of the connector assembly  400  through a joint force generated when the third connector  431  of the connector assembly  400  and the second connector  232  of the lamp  200  are interconnected. In other embodiments, in order to increase the engagement stability, the supporting member M 1  as shown in  FIG. 3  can be used to connect the connector assembly  400  and the lamp  200  together. When the lamp  300  is to be installed, only one suspension member R 3  is needed to be disposed on one end of the lamp  300  away from the connector assembly  400 , in which the other end the lamp  300  adjacent to the connector assembly  400  shares a bearing load of the lamp  300  through a joint force generated when the first connector  231  of the lamp  300  and the fourth connector  432  of the connector assembly  400  are interconnected. In other embodiments, in order to increase the engagement stability, the supporting member M 2  as shown in  FIG. 4  can be used to connect the lamp  300  and the connector assembly  400  together. 
     The present disclosure further provides a method for disassembling a lamp system. The method mainly includes the following steps. At first, a lamp system  100  shown in  FIG. 1  is provided. Then, the electrical connector assembly  230  of the lamp  300  to be disassembled is separated from its adjacent electrical connecting member  430  of the connector assembly  400 , in which one end of the lamp  300  is fixed by the suspension member R 3 . Thereafter, the suspension member R 3  is separated from the lamp  300  so as to remove the lamp  300 . More specifically, when the end of the lamp  300  close to the connector assembly  400  is separated from its adjacent connector assembly  400 , because the end of the lamp  300  away from the connector assembly  400  is fixed to the ceiling through the suspension member R 3 , the lamp  300  will not fall from the ceiling while it is being removed from the connector assembly  400 . Similarly, when the connector assembly  400  is separated from its adjacent lamp  200 , because the end of the connector assembly  400  away from the lamp  200  is fixed to the ceiling through the suspension member R 2 , the connector assembly  400  will not fall from the ceiling while it is being removed from the lamp  200 . Therefore, the method for disassembling the lamp system of the present disclosure is relatively safe, and there is no need to worry about the occurrence of the lamp or the connector assembly to be disassembled falling down on the ground. In addition, by the lamp design of the present disclosure, the user can remove one of the lamps or connector assemblies from the lamp system without additionally setting or removing another suspension member, thereby simplifying the overall lamp system as well as simplifying the assembling and disassembling method. 
     Referring to  FIG. 5 ,  FIG. 5  is a schematic diagram showing a lamp system in a usage state in accordance with an embodiment of the present disclosure. When the lamp system  100  of the present disclosure is applied in an environment, the lamp system  100  is located obliquely above a target object  500 . In the present embodiment, the lamp  200  (or lamp  300 ) has a length L, and the connector assembly  400  has a length P. 
     The length L of the lamp  200  (or the lamp  300 ) and the length P of the connector assembly  400  may affect the average illuminance and uniformity (i.e., the ratio of a minimum illuminance to an average illuminance) of the light emitted by the lamp  200  (or the lamp  300 ) on the target object  500 . In addition, the length P of the connector assembly  400  is used to determine a distance between the lamp  200  and the lamp  300 . Therefore, the length L of the lamp and the length P of the connector assembly satisfy the following formula (1): −8P 2 +6L×P−0.9L 2 &gt;0. 
     In an example where the environment is a shopping mall and the target object  500  is a shelf, according to the content related to Retail premises in the Table 5.27 of the European standard for lighting of indoor workplaces EN-12464-1: 2011, limiting values for sales area (The qualified conditions for the sales area) are that the average illuminance of the placement plane of the goods (target object  500 ) is greater than 300 (lx), and the uniformity is greater than 0.4. 
     This embodiment adopts a higher standard than the European lighting standard number: EN-12464-1:2011, and requires that the average illuminance is greater than 300 (lx) and the uniformity is greater than 0.5 as a better lighting condition. Therefore, in the lamp system  100 , the length L of lamp and the length P of the connector assembly can be designed according to the formula (1), so as to meet lighting requirements. 
     Referring to Table 1, in an example where the length of lamp L is 4 feet, the length P of the connector assembly can be designed to range from 30 cm to 60 cm, including end point values. More specifically, when the length P of the connector assembly is designed to from 30 cm to 60 cm, the results calculated from the formula (1) are all positive values. Moreover, it can also be seen from Table 2 that when the length P of the connector assembly is designed to range from 30 cm and 60 cm, the average illuminance is greater than 300 (lx) and the uniformity is greater than 0.5, which meets lighting requirements. When the length P of the connector assembly is less than 30 cm, excluding 30 cm, such as 10 cm, the result calculated by formula (1) is a negative value, and the uniformity is 0.459 which cannot meet the lighting requirement of 0.5. When the length P of the connector assembly is greater than 60 cm, excluding 60 cm, such as 70 cm, the result calculated by formula (1) is also a negative value, and the average illuminance is 291 (lx) which cannot meet the lighting requirement of 300 (lx). 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 calculation results from formula (1) 
               
            
           
           
               
               
               
            
               
                 length of 
                 length P of the connector 
                 results calculated from 
               
               
                 lamp L (mm) 
                 assembly (mm) 
                 formula (1) 
               
               
                   
               
            
           
           
               
               
               
            
               
                 1.2192 
                 0.1 
                 −0.69 
               
               
                   
                 0.2 
                 −0.19 
               
               
                   
                 0.3 
                 0.14 
               
               
                   
                 0.4 
                 0.31 
               
               
                   
                 0.5 
                 0.32 
               
               
                   
                 0.6 
                 0.17 
               
               
                   
                 0.7 
                 −0.14 
               
               
                   
                 0.8 
                 −0.61 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
             
               
                 TABLE 2 
               
             
            
               
                   
               
               
                 average illuminance and uniformity generated from lamp system 
               
               
                 with different length P of the connector assembly 
               
            
           
           
               
               
            
               
                   
                 length P of the connector assembly (cm) 
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                   
                 10 
                 20 
                 30 
                 40 
                 50 
                 60 
                 70 
                 80 
               
               
                   
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
            
               
                 average illuminance 
                 359 
                 349 
                 338 
                 326 
                 314 
                 303 
                 291 
                 280 
               
               
                 (lx) 
               
               
                 uniformity 
                 0.459 
                 0.482 
                 0.505 
                 0.527 
                 0.548 
                 0.567 
                 0.584 
                 0.6 
               
               
                   
               
            
           
         
       
     
     In other embodiments, if the relationship between a hanging height of the lamp and the target object  500  (e.g. a shelf) is further considered, since the lamp system  100  is located obliquely above the target object  500 , an angle θ of the light emitted by the lamp  200  (or the lamp  300 ) is related to the average illuminance and uniformity (the ratio of the minimum illuminance to the average illuminance). The angle θ is an included angle defined between a vertical line and a line which connects a bottom of the lamp  200  (or lamp  300 ) and a top of the target object  500 . Therefore, the length L of the lamp and the length P of the connector assembly and the included angle θ satisfy the following formula 
     
       
         
           
             
               
                 
                   
                     
                       1 
                       8 
                     
                     ⁢ 
                     tan 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     θ 
                   
                   &lt; 
                   
                     
                       
                         - 
                         8 
                       
                       ⁢ 
                       
                         P 
                         2 
                       
                     
                     + 
                     
                       6 
                       ⁢ 
                       L 
                       × 
                       P 
                     
                     - 
                     
                       
                         0 
                         . 
                         9 
                       
                       ⁢ 
                       
                         L 
                         2 
                       
                     
                   
                   &lt; 
                   
                     
                       1 
                       2 
                     
                     ⁢ 
                     tan 
                     ⁢ 
                     
                         
                     
                     ⁢ 
                     
                       θ 
                       . 
                     
                   
                 
               
               
                 
                   ( 
                   2 
                   ) 
                 
               
             
           
         
       
     
     If −8P 2  6 L×P−0.9L 2  is smaller than 
     
       
         
           
             
               
                 1 
                 8 
               
               ⁢ 
               tan 
               ⁢ 
               θ 
             
             , 
           
         
       
     
     it means that the height of the lamp  200  (or lamp  300 ) is disposed relatively high, so that it is likely to cause the average illuminance to be less than 300 (lx), which cannot meet lighting requirements of shopping malls. If −8P 2  6 L×P−0.9L 2  is greater than 
     
       
         
           
             
               
                 1 
                 2 
               
               ⁢ 
               tan 
               ⁢ 
               θ 
             
             , 
           
         
       
     
     it means that the height of the lamp  200  (or lamp  300 ) is relatively low, so that it is likely to cause a sense of oppression in the placement space of the target object  500 . 
     It can be known from the embodiments of the present disclosure that the lamp system of the present disclosure mainly uses the design of the electrical connecting members of the connector assembly and the lamp to achieve an electric and signal transmission function required for the jump connection and function expansion of the lamps, thereby effectively saving the system cost, and completing the electrical connection between lamps or between the lamps and external devices in a simple installation method. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.