Display Module with Liquid-Crystal Viewing-Angle Privacy Control

The patent applies a liquid crystal layer that can dynamically change its optical properties based on applied voltage. In the off-state, the liquid crystal molecules are arranged to allow wide viewing angles. When voltage is applied, the molecules reorient to restrict light transmission to specific angles, creating a privacy protection effect. This dynamic switching capability resolves the contradiction by allowing the display to adapt its viewing characteristics based on privacy requirements.

The patent changes the optical parameters of the display by using liquid crystal molecules that alter their refractive index and orientation based on electrical field application. By controlling the voltage applied to the liquid crystal layer, the display can switch between wide viewing angle mode (no voltage or low voltage) and privacy protection mode (high voltage), effectively managing the trade-off between viewing angle and privacy leakage through parameter changes.

The patent replaces traditional mechanical privacy filters (such as fixed louvers or static optical filters) with an electrically controllable liquid crystal system. This substitution allows for dynamic control of light transmission without the permanent light blocking inherent in mechanical filters. The liquid crystal layer can be switched between transparent and privacy-protecting states, maintaining high luminance when privacy protection is not needed while providing effective peep prevention when activated.

Instead of using a static privacy filter that continuously blocks light, the patent employs a dynamic liquid crystal system that only activates privacy protection when voltage is applied. This dynamic approach ensures that luminance is maintained at high levels during normal operation, while privacy protection is engaged only when required, thus resolving the contradiction between privacy protection and light transmission efficiency.

The patent merges the light regulation function directly into the display structure by integrating the liquid crystal layer as an inherent component of the display panel. Rather than adding separate external light regulating structures, the liquid crystal molecules themselves perform the light direction control function. This integration reduces overall device complexity while maintaining effective viewing angle control capabilities.

The liquid crystal layer serves multiple functions simultaneously: it acts as the display medium, provides viewing angle control, and enables privacy protection. This multi-functionality eliminates the need for separate dedicated light regulating structures, thereby reducing device complexity while achieving comprehensive viewing angle control and privacy management.