Abstract:
A lighting device includes a base, at least one light emitting chip, at least one optical member covering the light emitting chip, and a thermally conductive adhesive layer. The thermally conductive adhesive layer has opposite sides directly contacting the light emitting chip and the base, respectively.

Description:
TECHNICAL FIELD 
       [0001]    The disclosure is generally related to lighting devices, and more particularly to LED luminant devices and LED luminaries. 
       BACKGROUND 
       [0002]    In recent years, there has been increased interest and popularity in LED luminaires which use light emitting diodes (“LEDs”) as a light source. These LED luminaires become more and more attractive since they overcome many of the disadvantages of the light sources known to the inventor, which include incandescent light bulbs, fluorescent tubes, and halogen lamps. 
         [0003]    With the development of semiconductor lighting devices, LED lighting sources including LED chips are in great popularity in lighting luminaires used in both consumer and industrial markets. The inventor(s) has recognized that the LED lighting sources generate considerable heat. Excess heat can result in failure of the operating components of the lighting luminaires. The inventor(s) has also recognized that, in various LED lighting luminaires, including recessed lighting luminaires, all of the components are integrated into the luminaire so if one component goes bad, it is difficult to replace the failed component and it is often necessary to replace the entire recessed lighting luminaire. 
         [0004]    Referring to  FIG. 1 , China Patent No.: 201210006965.2 discloses an LED lighting module including a packaged unit  11 , a light emitting chip  12 , a light support  13 , a circuit board  14  and a heat sink  15 , wherein the combination of the packaged unit  11 , the light emitting chip  12  and the light support  13  is referred to as an LED component. The LED component is not usable independently because it is not equipped with the capacity of electricity and heat dissipation. The LED component is connected to the circuit board  14  and adhered on the heat sink  15  with thermally conductive material. Heat produced form the light emitting chip in the LED lighting module will dissipate with a large thermal resistance through the chip, the light support, the circuit base, the thermally conductive material and the heat sink. 
         [0005]    The inventor(s) has further recognized that various high power LED luminaires are assembled by multiple parts including LED lighting devices, aluminum substrates, heat sinks, bonding members, and seal enclosures. Different LED luminaires are assembled with different parts which are often not standardized for mass production. Without standardized components and/or mass production, the manufacturing cost remains a concern for the industry of LED luminaires. 
       SUMMARY 
       [0006]    According to one aspect of the disclosed embodiments, a lighting device includes a base, at least one light emitting chip, at least one optical member covering the light emitting chip, and a thermally conductive adhesive layer. The thermally conductive adhesive layer has opposite sides directly, which contact the light emitting chip and the base, respectively. 
         [0007]    According to a further aspect of the disclosed embodiments, a LED luminaire includes a plurality of LED components. Each LED component includes a base, a thermally conductive adhesive layer coated on the top surface of the base, a LED chip disposed on the thermally conductive adhesive layer, an optical member covering the LED chip, and a frame. The frame defines a plurality of cavities for accommodating the corresponding LED components. 
         [0008]    According to another aspect of the disclosed embodiments, a lighting device includes a base, a thermally conductive adhesive layer coated on the top surface of the base, a light emitting chip disposed on the thermally conductive adhesive layer, and an optical member covering the light emitting chip. The lighting device is free of a circuit board between the base and the light emitting chip. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0009]    One or more embodiments are illustrated by way of example, and not by limitation, in the figures of the accompanying drawings, wherein elements having the same reference numeral designations represent like elements throughout and wherein: 
           [0010]      FIG. 1  is a schematic diagram of a LED lighting module known to the inventor. 
           [0011]      FIG. 2  is a schematic diagram of the LED lighting device in accordance with the first embodiment of the present disclosure. 
           [0012]      FIG. 3  is a top perspective view of the LED lighting device without optical lens shown in  FIG. 2 . 
           [0013]      FIG. 4  is a schematic diagram of the light emitting chip included in the LED lighting device shown in  FIG. 2 . 
           [0014]      FIG. 5  is a schematic diagram of a LED lighting device in accordance with the second embodiment of the present disclosure. 
           [0015]      FIG. 6  is a top perspective view of the LED lighting device without packaging adhesive shown in  FIG. 5 . 
           [0016]      FIG. 7  is a schematic diagram of the light emitting chip included in the LED lighting device shown in  FIG. 5 . 
           [0017]      FIG. 8  is a schematic diagram of a LED lighting device in accordance with the third embodiment of the present disclosure. 
           [0018]      FIG. 9  is a top perspective view of the LED lighting device without optical shield shown in  FIG. 8 . 
           [0019]      FIG. 10  is a schematic diagram of the light emitting chip included in the LED lighting device shown in  FIG. 8 . 
           [0020]      FIG. 11  is a schematic diagram of an LED lighting device in accordance with the fourth embodiment of the present disclosure. 
           [0021]      FIG. 12  is a schematic diagram of an LED lighting device in accordance with the fifth embodiment of the present disclosure. 
           [0022]      FIG. 13  is a schematic diagram of an LED lighting device in accordance with the sixth embodiment of the present disclosure. 
           [0023]      FIG. 14  is a longitudinal sectional view of the LED lighting device shown in  FIG. 12 . 
           [0024]      FIG. 15  is a bottom perspective view of the LED lighting device in  FIG. 12 . 
           [0025]      FIG. 16  is a schematic diagram of a LED lighting device i in accordance with the seventh embodiment of the present disclosure. 
           [0026]      FIG. 17  is a schematic diagram of a LED lighting device in accordance with the eighth embodiment of the present disclosure. 
           [0027]      FIG. 18  is a schematic diagram of a LED lighting device in accordance with the ninth embodiment of the present disclosure. 
           [0028]      FIG. 19  is a schematic diagram of a LED lighting device in accordance with the tenth embodiment of the present disclosure. 
           [0029]      FIG. 20  is a schematic diagram of a LED lighting device in accordance with the eleventh embodiment of the present disclosure. 
           [0030]      FIG. 21  is a top perspective view of the LED lighting device in  FIG. 20 . 
           [0031]      FIG. 22  is a bottom perspective view of the LED lighting device in  FIG. 20 . 
           [0032]      FIG. 23  is a longitudinal sectional view of the LED lighting device shown in  FIG. 20 . 
           [0033]      FIG. 24  is a schematic diagram of a LED lighting device in accordance with the twelfth embodiment of the present disclosure. 
           [0034]      FIG. 25  is a schematic diagram of a LED lighting device in accordance with the thirteenth embodiment of the present disclosure. 
           [0035]      FIG. 26  is a schematic diagram of a LED lighting device in accordance with the fourteenth embodiment of the present disclosure. 
           [0036]      FIG. 27  is a schematic diagram of a LED lighting device in accordance with the fifteenth embodiment of the present disclosure. 
           [0037]      FIG. 28  is a schematic diagram of a LED lighting device in accordance with the sixteenth embodiment of the present disclosure. 
           [0038]      FIG. 29  is a schematic diagram of a LED lighting device in accordance with the seventeenth embodiment of the present disclosure. 
           [0039]      FIG. 30  is a schematic diagram of a LED lighting device in accordance with the eighteenth embodiment of the present disclosure. 
           [0040]      FIG. 31  is a schematic diagram of an LED luminaire in accordance with the nineteenth embodiment made of a LED lighting device protected in the present disclosure. 
           [0041]      FIG. 32  is a schematic diagram of another LED luminaire in accordance with the twentieth embodiment made of an LED lighting device protected in the present disclosure. 
           [0042]      FIG. 33  is a schematic diagram of an LED luminaire in accordance with the twenty first embodiment made of an array of LED lighting device protected in the present disclosure. 
           [0043]      FIG. 34  is a rear view of the LED luminaire of  FIG. 33 . 
           [0044]      FIG. 35  is a schematic diagram of a LED source module in accordance with the twenty second embodiment made of a LED lighting device protected in the present disclosure. 
           [0045]      FIG. 36  is a schematic diagram of a LED luminaire in accordance with the twenty third embodiment made of the LED source module shown in  FIG. 35 . 
       
    
    
     DETAILED DESCRIPTION 
       [0046]    It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and not regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless limited otherwise, the terms “connected,” “coupled,” and variations thereof herein are used broadly and encompass direct and indirect connections, couplings, and mountings. In addition, the terms “connected” and “coupled” and variations thereof are not restricted to physical or mechanical connections or couplings. 
         [0047]    Furthermore, and as described in subsequent paragraphs, the specific mechanical configurations illustrated in the drawings are intended to exemplify embodiments of the disclosure and that other alternative mechanical configurations are possible. 
         [0048]    Referring to  FIGS. 2 and 3 , an LED lighting device according to the first embodiment of the disclosure includes an optical lens  21 , a light emitting chip  22 , a thermally conductive layer  23  and a base  24 . The optical lens  21  is disposed on the light emitting chip  22  not only for waterproof and dustproof but also for adjusting the lighting efficacy for the LED lighting device. The thermally conductive layer  23  is a thin layer of thermally conductive and electrical conductive material coated on the top surface of the base  24  for coupling the light emitting chip  22  to the base  24 . Slots are provided at both sides of the optical lens  21  for accommodating the thermally conductive layer  23  according to the circuit layout thereof. Each wire of the thermally conductive layer  23  includes two bonding pads  25  on the both ends thereof, and the layout of each wire is designed according to the electrical needs for the light emitting chip  22 . The LED lighting device includes only one light emitting chip  22  covered with an optical lens  21 , and the base  24  is a heat sink made of ceramic material having good heat dissipation effect and electrical insulation. According to the LED lighting device of the invention, there is no need to dispose a light support between the base  24  and light emitting chip  22  to carry the light emitting chip  22  in comparison with the luminous module of  FIG. 1  that is required to include a light support  13  to carry the light emitting chip  12 . 
         [0049]    Referring to  FIG. 4 , it shows the LED lighting chip  22  in  FIGS. 2 and 3 . The LED lighting chip  22  has an anode pin  51  and a cathode pin  52  on its bottom and the anode pin  51  and the cathode pin  52  are soldered onto to the wire of the thermally conductive layer  23 . Preferably, the thermally conductive layer  23  is made of a layer of solder with good thermal and electrical conductivity for coupling the LED lighting chip  22  onto the base  24 . In another embodiment, the thermally conductive layer  23  may be conductive silver paste. In still another embodiment, the thermally conductive layer  23  may be made from one of the metals selected from the group consisting of molybdenum, manganese, wolframium, argentum, aurum, platinum, silver palladium alloy, cuprum, aluminum and stannum. 
         [0050]    Referring to  FIGS. 5 and 6 , an LED lighting device according to the second embodiment of the disclosure comprises a packaging adhesive  61 , a light emitting chip  62 , thermal coupling material and a base  64 . The thermal coupling material is a thin layer of metal circuit  63  which is coated on the surface of the base  64  and the light emitting chip  62  is disposed on the thermal coupling material. The metal circuit  63  is made from one of the metals comprising of molybdenum, manganese, wolframium, argentum, aurum, platinum, silver palladium alloy, cuprum, aluminum and stannum. The light emitting chip  62  is covered by a packaging adhesive  61  to achieve the waterproof and sealing effect. An anode  67  on the upper surface of the light emitting chip  62  is bonding to a pad  65  by a leading wire  66 , and a cathode  68  on the lower surface id light emitting chip  62  is coupling to the metal circuit layer  63  to further bonding to another pad  65 . A phosphor  69  is filled within the packaging adhesive  61  to change the spectrum of the light from the light emitting chip  62 . The base  64  is made of thermal plastic with electrical insulation. The metal circuit layer  63  is preferably made of a coating of conductive silver paste with good thermal conductivity, electrical conductivity and viscosity to adhere the light emitting chip  62  to the base  64 . 
         [0051]    Referring to  FIG. 7 , it shows the light emitting chip  62  in  FIGS. 5 and 6 . The light emitting chip  62  has an anode pin  67  on its upper surface and a cathode pin  68  on its bottom surface. The anode pin  51  is bonding to the pad  65  by the leading wire  66  and the cathode pin  52  is soldered onto to the wire of the metal circuit layer  63 . 
         [0052]    Referring to  FIGS. 8 ,  9  and  10 , an LED lighting device according to the third embodiment of the disclosure comprises an optical shield  91 , a light emitting chip  92 , a heat-conducting film  93  and a base  94 . The heat-conducting film  93  is coated on the surface of the base  94  and couples with the lower surface of the light emitting chip  92 . The light emitting chip  92  is covered by an optical shield  91  to achieve the waterproof and sealing effect. An anode  97  and a cathode  98  on the upper surface of the light emitting chip  92  are bonding to the pads  95  disposed on the heat-conducting film  93  by leading wires  96  extending out the optical shield  91  to implement the circuit connection. Specifically, the base  94  is a lighting cylinder and the heat-conducting film  93  is an insulator to electricity. The heat-conducting film  93  is preferably made of a diamond film which is an insulator to electricity but with good thermal conductivity to transfer heat efficiently from the light emitting chip  91  to the base  94 . The metal circuit layer and pads  95  are disposed on the heat-conducting film  93  to implement the circuit connection between the light emitting chip  92  and the power supply. 
         [0053]    Referring to  FIG. 11 , an LED lighting device according to the fourth embodiment of the disclosure comprises six light emitting chips  122 , a thermal coupling layer  123  and a base  124 . The six light emitting chips  122  with three different colors are arranged in a 2×3 matrix. The thermal coupling layer  123  including a thin layer of metal circuit is coated on the surface of base  124  for coupling the light emitting chips  122  to the base  124  and for electrically connecting through the layer of metal circuit to two leading wires  125  which are further connected to a power source. An optical sealing film  121  covers all light emitting chips  122  and the metal circuit with the two leading wires  125  extending out for being connected to a power source. The base  124  is made of a ceramic insulated material and the heat produced by light emitting chips  122  is transferred through the thermal coupling layer and the ceramic base  124  to the surrounding environment. Optical materials are disposed on all light emitting chips  122  to change the light spectrum of the light emitting chips  122 . 
         [0054]    Referring to  FIGS. 12 ,  14  and  15  an LED lighting device according to the fifth embodiment of the disclosure comprises a plurality of light emitting chips  132 , a metal circuit layer  133  and a base  134 . The light emitting chips  132  are of the same color as shown in  FIG. 12  or different color as shown in  FIG. 13 . The metal circuit layer  133  is coated on the surface of the base  134  for electrically connecting the light emitting chips  132  to the leading wires  135  which are connected to a power source. The base  134  is an insulated hollow member provided with auxiliary heat dissipation structures. The auxiliary heat dissipation structures include a plurality of heat dissipation ribs  137  radially extending outwardly from the base  134  and a ring structure with heat dissipation grooves  138  surrounding the heat dissipation ribs  137  to form a honeycombed structure. There are two through-holes  136  disposed in the base  134  and the leading wires  135  extend through these through-holes  136  to be connected to a power source. A screw thread portion  139  is provided inside the bottom portion of the base  134  for coupling the base  134  to a power supply device. 
         [0055]    Referring to  FIG. 13 , it shows an LED lighting device according to the sixth embodiment of the disclosure similar to the fifth embodiment shown in  FIG. 12 . The only difference is that the light emitting chips  132  are of different color as shown in  FIG. 12 . 
         [0056]    Referring to  FIG. 16 , it shows an LED lighting device according to the seventh embodiment of the disclosure similar to the fifth embodiment shown in  FIG. 12  Specifically, the screw thread portion  139  is disposed outside the bottom portion of the base  134 . 
         [0057]    Referring to  FIG. 17 , an LED lighting device according to the eighth embodiment of the disclosure comprises an optical lens  181 , a light emitting chip  182  enclosed within the optical lens  181 , a metal circuit layer  183  and a base  184 . The metal circuit layer  183  is disposed on the base  184  which is an insulated irregular pier made of insulated plastic material with thermal conductivity. A phosphor  185  is filled within the optical lens  181  to change spectrum of the light emitting chips  182 . 
         [0058]    Referring to  FIG. 18 , it shows an LED lighting device according to the ninth embodiment of the disclosure. The LED lighting device comprises a plurality of light emitting chips  192  of different colors disposed on the base  194 , and an optical lens  191  totally convers the light emitting chips  192  and the upper surface of the base  194 . A phosphor  195  is filled within the optical lens  191  to change spectrum of the light emitting chips  192 . The light emitting chips  192  are coupled onto the surface of base  194  by a metal circuit layer  193 , and the metal circuit layer  193  is preferably made of silver paste. The base  194  is a ceramic insulated disk with two holes  197  through which leading wires  196  extend for connecting the metal circuit layer  193  to a power source. 
         [0059]    Referring to  FIG. 19 , it shows an LED lighting device according to the tenth embodiment of the disclosure. The LED lighting device comprises four light emitting chips  202  arranged in a 2×2 matrix on the base  204 , wherein two light emitting chips  202  are red and the other two light emitting chips  202  are blue. The four light emitting chips  202  and a portion of the base  204  are covered by an optical lens  201 . A metal circuit layer  203  is coated on the surface of base  204  for electrically connecting the light emitting chips  202  to the leading wires  205  which pass through the slots between the optical lens  201  and the base  204  for being connected to a power source. The base  204  is a ceramic insulated plate and the heat produced by light emitting chips  202  is transferred through the metal circuit layer  203  and the ceramic base  204  to the surrounding environment. A phosphor  206  is filled within the optical lens  201  to change light spectrum of the light emitting chips  202 . 
         [0060]    Referring to  FIGS. 20 ,  21   22  and  23 , an LED lighting device according to the eleventh embodiment of the disclosure comprises a plurality of light emitting chips  212  disposed on the upper surface of a base  214 . The base  214  has a shape flared upwardly from a lower portion of the base  214  to the upper surface of the base  214 . The shape of the base  214  is also referred to as a trumpet shape. For example, the LED lighting device comprises four light emitting chips  212  of the same color arranged in a 2×2 matrix on the base  214 . Two of the four light emitting chips  212  are covered by an optical shield  211  and the other two light emitting chips  212  are covered by another optical shield  211 . A metal thermally conductive layer  213  is coated on the surface of base  214  for electrically connecting the light emitting chips  212  to the base  214 . The base  214  is a ceramic insulated body provided with auxiliary heat dissipation structure with heat dissipation fins  216  and grooves  217  to enhance the heat dissipation effect. As shown in  FIGS. 22 and 23 , there are two through-holes  215  disposed in the base  214  and two pins  218  extend through these through-holes  215  to be connected to a power source. 
         [0061]    Referring to  FIG. 24 , it shows an LED lighting device according to the twelfth embodiment of the disclosure. Specifically, the LED lighting device comprises six light emitting chips  252  disposed on the base  254  either in a 2×3 matrix or in an irregular pattern. Each individual light emitting chip  252  is covered by an individual optical lens  251   a.  A thermally conductive layer  253  is coated on the surface of base  254  and the heat produced by light emitting chips  252  is transferred through the thermally conductive layer  253  and the ceramic base  254  to the surrounding environment. The thermally conductive layer  253  is preferably made of a thin diamond film. Leading wires  255  electrically connect the light emitting chips  252  to an outer power source. The entire base  254  and all light emitting chips  252  are covered by a layer of protective film  251   b.    
         [0062]    Referring to  FIG. 25 , it shows an LED lighting device according to the thirteenth embodiment similar to the twelfth embodiment. Specifically, the LED lighting device comprises six light emitting chips  262  disposed on the base  264  in a 2×3 matrix, and each individual light emitting chip  262  is covered by an individual optical lens  261   a.  An optical shield  261   b  covers the entire upper surface of the base  264  for protecting the light emitting chips and the optical lens  261   a.  The base  264  is a ceramic insulated body with a through-hole  265  disposed in its center portion and a metal circuit layer  263  is patterned on the surface of base  264  for electrically connecting the light emitting chips  262  to the leading wires  266  which pass through the through-hole  265  for being connected to a power source. 
         [0063]    Referring to  FIG. 26  it shows an LED lighting device according to the fourteenth embodiment of the disclosure. Specifically, the LED lighting device comprises four light emitting chips  272  having same color and arranged in a 2×2 matrix on the base  274 . Every light emitting chip  272  is individually covered by a packaging adhesive  271   a.  A bigger optical shield  271   b  completely covers the whole base  274  and all four light emitting chips  272 . A thin layer of metal circuit  273  is coated on the surface of base  274  for electrically connecting the four light emitting chips  272  together and further connecting to the external leading wires  276 . The base  274  is an insulated plastic cuboid having a through-hole  275  in the center. The leading wires  276  extend through the through-hole  275  to form two strands with Insulated paint coating on each surface of the strand. Both strands of the external leading wires  264  are separately connected to an anode and a cathode. The base  274  is provided with a fitting sleeve  277  on the bottom side and the external leading wires  276  extend inside. An LED driving device is disposed inside the fitting sleeve  277  and electrically connected with the external leading wires  276 . 
         [0064]    Referring to  FIG. 27 , it shows an LED lighting device according to the fifteenth embodiment of the disclosure. The LED lighting device comprises a lighting component  292  packaged in a packaging adhesive. The entire lighting component  292  is covered by an optical shield  291   a  which is filled with a phosphor  295  to change spectrum of the lighting component  292 . A bigger optical shield  291   b  covers the optical shield  291   a  for waterproof and dustproof. The lighting component  292  is coupled on the surface of the base  294  by a thin layer of metal circuit  293  which is preferably made of thermally conductive silver paste. Heat generated from the chip in the lighting component  292  is dissipated to the base  294  through the metal circuit  293  then further to the surrounding environment. The base  294  is a ceramic insulated hollow member with two through-holes  298  and with auxiliary heat dissipation structures which include a plurality of heat dissipation ribs  296  radially extending outwardly from the base  294  and a ring structure with heat dissipation grooves  297  surrounding the heat dissipation ribs  296 . 
         [0065]    Referring to  FIG. 28 , it shows an LED lighting device according to the sixteenth embodiment of the disclosure. Specifically, the LED lighting device comprises a lighting component  301  having a light emitting chip  302 , a packaging optical shield  303  and a light bracket  304 . A thin layer of thermally conductive material  305  but electrical insulated is coated on the top surface of the base  306  for coupling the light emitting chip  302  to the base  306 . Preferably, the thermally conductive material  305  is an insulating paint which is coated on the entire outer surface of the base  306 . A metal circuit layer  307  electrically connects the lighting component  301  to the two bonding pads  308  disposed on the base  306 . The base  306  is a lighting cylinder coated by the insulate paint  305 . A phosphor  309  is filled into the optical shield  303  to change spectrum of the lighting component  301 . 
         [0066]    Referring to  FIG. 29 , it shows an LED lighting device according to the seventeenth embodiment of the disclosure. Specifically, the LED lighting device comprises four lighting components  312  having same color arranged in 2×2 matrix pattern on the base  314 . All four lighting components  312  are covered by an optical shield  311  for waterproof and dustproof and the optical shield  311  is filled with a phosphor  315  to change spectrum the lighting component  312 . A thin layer of metal circuit  313  is coated on the surface of the base  314  to electrically connect the four lighting components  312  together. The base  314  is a ceramic insulated hollow member with auxiliary heat dissipation structures which include a plurality of heat dissipation ribs  316  radially extending outwardly from the base  314  and a ring structure with heat dissipation grooves  317  surrounding the heat dissipation ribs  316 . 
         [0067]    Referring to  FIG. 30 , it shows an LED lighting device according to the eighteenth embodiment of the disclosure. The LED lighting device comprises two light emitting chips  322  covered by an optical lens  321  for waterproof and dustproof. A thin layer of metal circuit  323  coated on the surface of the base  324  for electrically connecting the two light emitting chips  322  together is preferably made of thermal silver paste. The base  324  is a ceramic insulated member and an auxiliary lighting heat dissipation structure  325  is mounted on the backside of the base  324 . The base  324  have a through-hole  326  therein and the leading wires  327  pass through the through-hole  326  for being connected to an LED driving device  328  disposed within the auxiliary lighting heat dissipation structure  325 . 
         [0068]    Referring to  FIG. 31 , it shows an LED bulb according to the nineteenth embodiment of the disclosure. Specifically, an LED bulb comprises an LED component  331  and an E-type connector  332 . The LED component  331  includes an optical shield, a light emitting chip  333 , thermal coupling material, and a base. The thermal coupling material is a thin diamond film disposed on the top surface of the base, and the base is a lighting member coated by the diamond film. A film of metal layer is coated on the surface of diamond film for circuit connection. Auxiliary heat dissipation structures are mounted on the base. An LED driving device is disposed inside the base. An E-type connector  332  is mounted on the base to form the LED bulb. 
         [0069]    Referring to  FIG. 32 , it shows an LED bulb according to the twentieth embodiment of the disclosure. Specifically, an LED bulb comprises an LED component  341  and a MR-type connector  342 . The LED component  341  includes an optical, four light emitting chips  343 , thermal coupling material, and a base. The four light emitting chips  343  comprise different color chips and are arranged in a 2×2 matrix on the base. The thermal coupling material is a layer of thermal silver paste coated on the top surface of the base for electrically connecting the four light emitting chips  343 . The base is a ceramic member having cavity inside for accommodating an LED driving device. A MR-type connector  342  is mounted on the base to form the LED bulb. 
         [0070]    Referring to  FIGS. 33 and 34 , it shows an LED luminaire according to the twenty first embodiment of the disclosure. Specifically, the LED luminaire comprises a plurality of LED components  351  disposed on a luminaire frame  352 . The LED components  351  can be welded, adhered, or plugged to the luminaire frame  352 . The LED components  351  can be fixed in the frame  352  permanently or detachably. The frame  352  is a honeycombed member with an LED driving device  353  provided at the bottom side thereof for fixing the LED components  351  and electrically connecting LED components  351  to the LED driving device  353 . The LED driving device  353  is attached to the frame  352  via permanent connection (such as, welding connection) or detachable connection (such as, screw fixation). 
         [0071]    Referring to  FIG. 35 , it shows an LED luminaire  373  according to the twenty second embodiment of the disclosure. Specifically, the LED luminaire comprises a plurality of LED components  371  disposed in a matrix pattern on a rectangular frame  372  to form an LED luminaire module. The rectangular frame  372  is preferably made of ceramic with a plurality of cavities for accommodating the LED components  371 . The LED components  371  can be welded, adhered, or plugged to the frame  372  permanently or detachably. The LED components can be arranged in any way to form the LED luminaire, not limited to the 2×3 matrix configuration shown in  FIG. 35 . 
         [0072]    Referring to  FIG. 36 , it shows an LED luminaire according to the twenty third embodiment of the twenty second embodiment. Specifically, a plurality of LED luminaire module of the twenty second embodiment is assembled within a luminaire shell  374 . The luminaire shell  374  is provided with an LED driving device  375  for providing power to and driving the circuit of LED components  371 . Not limited to the configuration shown in  FIG. 36 , the LED luminaire module can be configured in other ways, for example, 2×3 matrix, 3×3 matrix. 
         [0073]    According to the present disclosure, there is no need to dispose a circuit board between the light emitting chip and the base in order to provide the light emitting chip with electricity in comparison with conventional luminous devices. This may reduce thermal resistance, and therefore enhance heat dissipation significantly. 
         [0074]    Although the preferred embodiments of the disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the disclosure as disclosed in the accompanying claims.