Backlight Unit Reflecting Plate Light Path Conversion Sheet

The patent extracts and removes the complex wedge-type light guide plate with step patterns from the system. Instead, it uses a simple flat light guide plate combined with a paralax barrier, separating the light guiding function from the stereoscopic effect generation function, thereby eliminating the need for precise step pattern machining.

The patent inverts the conventional approach by placing the paralax barrier at the light source side rather than requiring complex internal structures in the light guide plate. This reversal simplifies the light guide plate manufacturing while achieving the same optical directional function through the barrier's microlens array.

The patent removes the reflective curved surface from the light guide plate structure, extracting this function entirely. The flat light guide plate combined with paralax barrier achieves light extension without requiring the additional thickness needed for curved reflective surfaces.

The patent changes the structural parameters of the light guide plate from wedge-shaped with curved surfaces to a flat plate configuration. This parameter change maintains the light guiding function while significantly reducing the device thickness.

The patent extracts the complex step pattern structure from the light guide plate and replaces it with a simple flat plate. The optical directional control function is transferred to the paralax barrier, which can be manufactured more easily and with lower failure rates.

The patent adopts a simpler, cheaper light guide plate structure that can be manufactured at lower cost with higher yield. The paralax barrier serves as the dedicated component for stereoscopic effect, allowing for more economical overall manufacturing.

The patent extracts the light extraction function from the light guide plate's internal step patterns and relocates it to the paralax barrier's microlens array. This separation eliminates the need for complex machining of the light guide plate while maintaining effective light extraction for stereoscopic display.

The patent replaces the mechanical machining of step patterns with an optical solution using the paralax barrier's microlens array. This substitution eliminates complex mechanical manufacturing processes while achieving the desired light extraction and directional control.