| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED light source device that can eliminate stripe-shaped unevenness generated on a screen and improve the grade of a surface light source. <P>SOLUTION: In an LED module 2 of the LED light source device, light diffusion lenses 5 are installed on LEDs 4 mounted on a printed-circuit board 3 so as not to line up directions of the light diffusion lenses 5 by alternately changing directions of the light diffusion lenses 5. Five pieces of LEDs 4 and five pieces of light diffusion lenses 5 placed on the LEDs 4 are arranged in a line in the LED module 2, and directions of the light diffusion lenses 5 are alternately arranged in the directions of arrows d1, d2. When the direction of the arrow d1 is set up to be one (angle 0°) of arrangement directions of respective light diffusion lenses 5, the direction of the arrow d2 is a direction inclined at an angle 45° against the direction of the arrow d1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
