| 主权项 |
1. A light guide plate, comprising:
a light guide member with a light incident surface, a first principal surface, and a second principal surface; and a plurality of protrusions formed on at least one of the first principal surface and the second principal surface, wherein the plurality of protrusions includes a first protrusion and a second protrusion, when the first principal surface is viewed in a normal direction, a distance between the light incident surface and the second protrusion is larger than a distance between the light incident surface and the first protrusion, a length of each of the first protrusion and the second protrusion in an orthogonal direction orthogonal to a propagation direction of light incident from the light incident surface increases monotonously in the propagation direction, and a minimum value of the length of the second protrusion in the orthogonal direction is larger than a maximum value of the length of the first protrusion in the orthogonal direction, the first protrusion and the second protrusion each has a trapezoidal shape, the first protrusion has an upper side, a lower side, a right side, and a left side, the upper side and the lower side of the first protrusion being parallel to each other, the second protrusion has an upper side, a lower side, a right side, and a left side, the upper side and the lower side of the second protrusion being parallel to each other, the right side of the first protrusion is aligned with the right side of the second protrusion, and the left side of the first protrusion is aligned with the left side of the second protrusion. |
