| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display, capable of reducing loss of light energy and improving the luminance of a screen by reducing light leakage from a gap between a reflection sheet on the rear-side of a light guide body and a printed board of a light source part. <P>SOLUTION: The liquid crystal display 1 is provided with a compact surface light source 6, arranged in a backlight 3, on the rear side of a liquid crystal display panel 2 and a light guide body 5 as a substantially rectangular plate which is arranged in the backlight 3 to radiate a light, emitted from the light source 6 from a light exit main surface 5a, to the liquid crystal display panel 2. The light guide body 5 has a surface-side inclined surface 10, where a side edge part is inclined at an inclination angle α so that thickness is thinned gradually, starting from a light-incidence side surface 5a to an opposite-side surface 5d and has a rear-side inclined surface 11, on the side of an opposite main surface 5c opposite to the surface side inclined surface 10, in parallel with the surface 10. If refractive index of the light guide body 5 is defined as n and the incident angle of light radiated from the light source 6 to the light incident side surface 5a at a radiation angle β upon the surface side inclined surface 10 is defined as γ, relations α< γ-β and γ=sin<SP>-1</SP>(1/n) holds. <P>COPYRIGHT: (C)2008,JPO&INPIT |
