The technology of high luminous v-cut light guide plate has been widely used in laptop computers.
The technology of v-cut light guide plate which is applied in backlight module is very popular in laptop computers nowadays. Its main structure is that a prism which has been micro-machined is installed on the light guide plate and one downward zigzag prism sheet replaces upward two prisms. It not only reduces the cost, but also effectively increases 30% of luminance.
Compared with the structure of two upward prisms, the v-cut light guide plate with the structure of one downward prism has more than 30% light efficiency. But its view angle correspondingly disappears. Fortunately, it will not affect the laptop computer, but can protect its privacy, though the pass rate is relatively low. For example, most of technology leading Japanese manufacturers with v-cut technology only have 80% pass rate, and the old technology has more than 95% pass rate. And the pass rate is impossible to skyrocket in a short time, so the cost is very difficult to decrease effectively. Because of excellent light efficiency performance, the technology of v-cut light guide plate has been gradually adopted by high-end laptop computers. For example, there are more than 40% laptop computers that adopt v-cup technology in Korea, and the technology has been widely used for a few years in Japan. However, although the v-cut light guide plate has been widely used, backlight module manufacturers still face quite a few patent restrictions because these patents are mostly owned by Japanese manufacturers. If we can’t break the new technical obstacles on our own, we have to obtain authorization by purchasing patents in order to meet the requirement of the market.