Hirosi Takahara

Title: Hirosi Takahara and His Liquid Crystal Display Invention.

Introduction

Hirosi Takahara is an inventor associated with Neyagawa, Japan, and Matsushita Electric Industrial Co., Ltd. His work includes a patent for a liquid crystal panel designed to control light through scattering and diffraction.

Latest Patents

Takahara is credited with 1 patent: “Polymer Dispersed Liquid Crystal Panel with Diffraction Grating.” The invention describes a polymer-dispersed liquid crystal layer paired with an irregular surface formed on an electrode. When arranged in a regular, repeating pattern, the surface acts as a diffraction grating.

In the panel’s OFF state, the grating and liquid crystal have different refractive indices, causing incoming light to scatter and diffract. In the ON state, their refractive indices match, allowing light to pass through. Used as a light valve in a projection system, the panel can direct scattered or diffracted light toward an aperture’s light-shielding section, preventing it from reaching the screen during black display.

Career Highlights

Takahara’s documented patent work reflects an application of liquid crystal technology to image projection and light control. His patent describes how the panel’s optical behavior can help produce dark areas in a projected image.

Collaborations

Takahara is associated with Matsushita Electric Industrial Co., Ltd. His listed coworkers include Hideki Omae and Takaaki Tanaka.

Conclusion

Hirosi Takahara’s patent presents a liquid crystal panel that uses a patterned surface and refractive-index changes to manage light for projection displays.