| 摘要 |
<p>A thin and lightweight light guide plate having a cross-sectional shape on the back of a rectangular light exit face satisfying the functional equation of degree ten below in order to provide a large size light guide plate capable of emitting illumination light more uniformly with higher luminance from the light exit face. In the equation, X is the position from the origin O in the direction parallel to one side of the light guide plate, and Y is the position from the origin O in the direction perpendicular to the one side of the light guide plate. Y=A<SUB>0</SUB>+A<SUB>1</SUB>×X+A<SUB>2</SUB>×X<SUP>2</SUP>+A<SUB>3</SUB>×X<SUP>3</SUP>+A<SUB>4</SUB>×X<SUP>4</SUP>+A<SUB>5</SUB>×X<SUP>5</SUP>+A<SUB>6</SUB>×X<SUP>6</SUP>+A<SUB>7</SUB>×X<SUP>7</SUP>+A<SUB>8</SUB>×X<SUP>8</SUP>+A<SUB>9</SUB>×X<SUP>9</SUP>+A<SUB>10</SUB>×X<SUP>10</SUP> -1.3×10<SUP>5</SUP>=A<SUB>0</SUB>=2.4×10<SUP>5</SUP>, -2.0×10<SUP>4</SUP>=A<SUB>1</SUB>=9.4×10<SUP>4</SUP>, -2.6×10<SUP>4</SUP>=A<SUB>2</SUB>=5.7×10<SUP>4</SUP>, -5.5×10<SUP>3</SUP>=A<SUB>3</SUB>=2.2×10<SUP>3</SUP>, -2.1×10<SUP>2</SUP>=A<SUB>4</SUB>=1.1×10<SUP>2</SUP>, -3.7×10=A<SUB>5</SUB>=2.2×10, -1.4×10=A<SUB>6</SUB>=3.3×10, -3.6=A<SUB>7</SUB>=1.5, -7.8×10<SUP>-2</SUP>=A<SUB>8</SUB>=3.3×10<SUP>-2</SUP>, -1.2×10<SUP>-2</SUP>=A<SUB>9</SUB>=3.2×10<SUP>-2</SUP>, -1.4×10<SUP>-3</SUP>=A<SUB>10</SUB>=4.9×10<SUP>-4</SUP>. A surface illuminator comprises the light guide plate, and a liquid crystal display comprises the surface illuminator as a backlight unit.</p> |
