Company Filing History:
1 out of 1 
1 out of 832,912 Years Active: 2004
Title: Innovations of Chih-Han Fang
Introduction
Chih-Han Fang is a notable inventor based in Hsinchu Hsien, Taiwan. He has made significant contributions to the field of optical technologies, holding a total of 2 patents. His work focuses on innovative light collimating systems and production methods for light guides.
Latest Patents
One of his latest patents is a light collimating system. This system includes a transparent substrate, a plurality of conic elements, and a screen. Each conic element features a narrow light incident side, where the screen is attached, and a wide light emitting side connected to the transparent substrate. The conic elements are designed with segments that form a truncated cone, with an opening angle that decreases towards the light emitting side. The screen has multiple transmission areas covered by the light incident sides of the conic elements. Incoming light outside these areas is reflected from the screen. The diffuse light entering the conic elements through the transmission areas is collimated by refraction and total reflection at the peripheral surfaces, resulting in a light bundle with a narrow angular intensity distribution emanating from the transparent substrate.
Another significant patent by Fang is a production method for a light guide and a stamper. This method combines anisotropic and isotropic etching techniques. Initially, a plurality of microstructures is formed on both the back and front surfaces of the substrate. Through electroforming, rear and front stampers are created from these surfaces. Light guides are then produced using these stampers. Anisotropic etching is applied to the front surface, forming V-shaped, U-shaped, or pyramid-like microstructures, while isotropic etching is performed on the back surface, resulting in quadratic, bowl-like, oval, or semicircular microstructures. If a transparent substrate is utilized, additional components such as a light source, reflector, diffusion sheet, and prism sheet are added to simulate a backlight module for testing luminosity, uniformity of light intensity, and light emission angle.
Career Highlights
Chih-Han Fang has worked with Litek Opto-electronics Co., Ltd., where he has contributed to various projects in optical technology. His expertise in light collimation and production methods has positioned him as a valuable asset in the industry.
Collaborations
Fang has collaborated with notable individuals such as Shih-Chou