| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device in which a plurality of point light sources are densely mounted with improved compactness and thinness, and temperature rise of individual point light sources is effectively suppressed to prevent deterioration of its lifetime and luminous efficiency. <P>SOLUTION: In the lighting device, a light guide plate 12 and a PCB 14 of which on the surface a plurality of LEDs 13 are conducted and installed are housed in a light frame 16 made of a sheet metal material with superior thermal conductivity, a plurality of L-shape pushing members 17a formed at one end of a pushing plate 17 made of sheet metal material with superior thermal conductivity are made to contact the surface of the PCB 14 between the adjoining LEDs through a copper pattern 14a formed for heat radiation, the rear face of the PCB 14 is made to closely adhere the side plate 16a of the light frame 16, and the heat generated from each LED 13 is radiated through the course of two channels of a course passing from the copper pattern 14a to the pushing plate 17 and a course passing from the copper pattern 14a to the light frame 16. <P>COPYRIGHT: (C)2007,JPO&INPIT |
