| 摘要 |
A backlight unit ( 2 ) comprising a shallow box type case ( 3 ) having low profile sidewalls and opening upward, a light guide plate ( 7 ) in the box type case ( 3 ), and a supporting frame ( 11 ) containing optical members such as a linear light source ( 8 ) and an optical sheet ( 10 ) and securing the optical members in place by being fitted in the opening. A first engaging portion ( 4 ) is provided on the inside of the sidewall of the box type case ( 3 ) and second engaging portions ( 12 <SUB>1</SUB>- 12 <SUB>4</SUB>) are provided on the outer surface of the sidewall of the supporting frame ( 11 ) being fitted in the upper opening of the box type case ( 3 ). A locking means ( 14 ) is attached to the second engaging portion such that the locking means ( 14 ) engages with and locks the first engaging portion when the first and second engaging portions engage with each other, thus preventing unfastening of the supporting frame. A liquid crystal display employing the backlight unit is also provided.
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