Sekonix Co., Ltd.

Youngbin Yu

Hyunsoo Lee

Gyuhwan Hwang

Disclosed are an optical display device producing uniform light distribution and a method of fabricating such devices. The optical display device has waveguides arranged in vertical and horizontal directions. The waveguide has a conical shape whose cross-section decreases towards the light-projection side thereof. At least one of the size, height, spacing, and refraction index of the waveguide is designed to be different for each section, depending on an incident angle and/or intensity of light inputted from a light source. Therefore, the intensity of projected light can be made uniform over all sections of the optical device.

Display device uniforming light distribution throughout areas and method for manufacturing same

Disclosed is an optical device for a display having a tapered waveguide and a method of fabricating such devices. In order to reduce light absorption inside the waveguide, a light-absorbing material is coated on the front surface only of the optical device Alternatively, a space adjacent to the waveguide is coated with a material having a refraction index different from the waveguide, preferably, lower than that of the waveguide and then filled with a light-absorbing material. In addition, a large- and uniform-sized light-absorbing material may be filled in the space. The optical device has an improved light efficiency, and thus exhibits an excellent luminance, as compared with the conventional ones, when using an identical light source. Furthermore, the fabrication method can produce such optical devices in a simplified manner, thus improving production efficiency.

Growing community of inventors

Seoul, South Korea

Youngbin Yu