| 摘要 |
The present invention provides a light guide plate and a backlight module. The light guide plate has a light incident surface that has an arc configuration. The light guide plate includes an upper surface and a lower surface that have sides that are adjacent to the light incident surface and are respectively provided with a first slope surface and the second slope surface, so that large angle light, after being subject to an effect of convergence with the arc light incident surface, is subjected to total internal reflection at the first slope surface and the second slope surface to have the light guided into the light guide plate. The light guided into the light guide plate, after transmission and reflection, projects out through a light exit surface thereby improving light utilization and increasing light coupling efficiency. Since the light guide plate having the above-described structure demonstrates an excellent effect of convergence for light of all angles, the light guide portion of the light guide plate can be structured thinner without deteriorating light coupling efficiency, thereby facilitating a design of thinning of a backlight module. The present invention provides a backlight module, which involves a light guide plate having the above-described unique structure, so that the backlight module has a reduced thickness and a bettered effect of light emission. |
| 主权项 |
1. A light guide plate, comprising a first end surface, a second end surface opposite to the first end surface, an upper surface connected to upper ends of the first end surface and the second end surface, and a lower surface connected to lower ends of the first end surface and the second end surface;
wherein the first end surface comprises an arc configuration bulging outwardly of the light guide plate; wherein the upper surface comprises three sections, which are respectively a first horizontal surface, a first slope surface, and a second horizontal surface, the first horizontal surface being connected to the first end surface, the first slope surface being connected, at an inclination, between the first horizontal surface and the second horizontal surface, the first horizontal surface and the first slope surface defining therebetween a first included angle, the first included angle being an obtuse angle; wherein the lower surface comprises three sections, which are respectively a third horizontal surface, a second slope surface, and a fourth horizontal surface, the third horizontal surface being connected to the first end surface, the second slope surface being connected, at an inclination, between the third horizontal surface and the fourth horizontal surface, the third horizontal surface and the second slope surface defining therebetween a second included angle, the second included angle being an obtuse angle; and wherein the first end surface serves as a light incident surface of the light guide plate and the second horizontal surface serves as a light exit surface of the light guide plate. |
