Edge-Type Backlight Line Light Source Time-Division Driving for Multi-Zone Displays

The patent applies time-division multiplexing where the backlight unit sequentially illuminates different pixel rows at different time intervals. During each time slot, a specific set of pixels is activated to display image data for a particular viewing zone, while other pixels remain inactive. This temporal separation allows full-resolution image data to be transmitted to multiple viewing zones without spatial compression, resolving the contradiction between providing multiple viewing zones and maintaining image resolution.

The patent replaces the mechanical/optical lenticular lens system with an electronically controlled backlight unit. Instead of using physical lenses that refract light to create viewing zones, the invention uses a line light source that can be selectively activated in different time slots to illuminate specific pixel rows, which in turn direct light to different viewing zones. This substitution of mechanical optical components with an electronically controlled system eliminates sensitivity to temperature and humidity while maintaining the ability to create multiple viewing zones.

The patent uses a single line light source that operates in a time-division manner, sequentially activating different segments of the light source corresponding to different pixel rows at different time intervals. This periodic activation pattern allows one light source to perform the function that would otherwise require multiple simultaneous light sources, thereby maintaining image resolution across multiple viewing zones while minimizing device complexity and cost.