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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
Published on: May 15, 2017
Viewing angle controllable liquid crystal display with high transmittance
Young Jin Lim1, Jin Ho Kim, Jung Hwa Her
1Polymer BIN Fusion Research Center, Department of Polymer-Nano Science and Technology, Chonbuk National University, Chonju, Chonbuk 561-756, Korea.
Optics Express
|April 15, 2010
Summary
This study introduces a novel liquid crystal display (LCD) that improves light efficiency by using a unique pixel design. The new design enhances viewing angle control without sacrificing transmittance.
Area of Science:
- Optoelectronics
- Materials Science
Background:
- Conventional liquid crystal displays (LCDs) with pixel division suffer from reduced light efficiency.
- Sub-pixels controlling viewing angle often block light at normal incidence, sacrificing display brightness.
Purpose of the Study:
- To propose a new viewing angle controllable homogeneously aligned LCD.
- To overcome the transmittance sacrifice issue in conventional displays.
Main Methods:
- The proposed pixel comprises red, green, blue, and white sub-pixels.
- Colored pixels use fringe-field switching; the white pixel uses a complex electric field.
- Liquid crystal (LC) directors are controlled to rotate in-plane or tilt upward for viewing angle modulation.
Main Results:
- In wide-viewing angle mode, all LC directors rotate in-plane, achieving high transmittance.
- In narrow-viewing angle mode, white pixel LC directors tilt upward, creating light leakage for angle control.
- The device maintains normal direction transmission for image expression.
Conclusions:
- The proposed LCD design significantly enhances light efficiency compared to conventional methods.
- This innovation addresses a long-standing challenge in display technology.
- The device offers effective viewing angle control without compromising overall brightness.
