Industrial Technology Research Institute

National Taiwan University

Chin-Kai Chang

Hui-Lung Kuo

Chih-Kung Lee

Chih-Hao Chen

Kuan-Ting Chen

Wen-Jong Wu

Ding-Zheng Lin

Yi-Ping Hsieh

Mei-Chih Peng

Tsung-Dar Cheng

You-Chia Chang

Chau-Shioung Yeh

The invention provides a broadband cholesteric liquid crystal film, a method for fabricating the same, a polarization device employing the same, and high light efficiency liquid crystal display employing the same. The cholesteric liquid crystal film is a single-layer liquid crystal material structure, and has a top surface and a bottom surface. Further, the cholesteric liquid crystal film includes a first region, a second region, and a third region, and the first region is adjacent to the top surface of the cholesteric liquid crystal film, the third region is adjacent to the bottom surface of the cholesteric liquid crystal film, and the second region is located between the first and third regions, and the average helical pitch Pof the first region and the average helical pitch Pof the third region are both larger than the average helical pitch Pof the second region.

Broadband cholesteric liquid crystal film, method for fabricating the same, polarization device, and high light efficiency liquid crystal display employing the same

A gas sensor cell using a liquid crystal composite material is provided. The gas sensor cell has recovery capability and can be reused. Upon gas adsorption, the liquid crystal composite material has visually detectable color changes and changes in electrical properties to facilitate the measurement of gas concentration from low to high.

Liquid crystal gas sensor cell and the use thereof

An actuator and a method for using the same are provided. The actuator includes a flexible element and a photoelectric layer. The flexible element includes an elastic layer or a piezoelectric layer. The photoelectric layer is disposed on a side of the flexible element. An electrical characteristic of the photoelectric layer is determined according to an irradiation condition of the photoelectric layer.

Actuator and method for using the same

A micro optical head is provided, which provides sub-wavelength focusing spot and very long depth of focus. The optical head includes a transparent substrate, an opaque film, and at least one sub-wavelength annular channel. After coherent light transmits the transparent substrate supporting the optical head and passes through the appropriately designed sub-wavelength annular channel, the transmitted light can overcome the diffraction limit, and the transmission energy is improved efficiently. The transmitted light converges after a certain distance behind the optical head and forms a sub-wavelength-scale beam that maintains a very long distance without divergence.

Optical head

Growing community of inventors

Tainan, Taiwan

Chin-Kai Chang