Projection Display Wheel Timing Synchronization

The patent introduces a feedback mechanism where the timing adjustment unit detects the actual rotation timing of the light-emitting wheel and color separation wheel, compares it with the desired timing, and automatically adjusts the rotation timing to achieve synchronization with the image-forming element. This closed-loop feedback system eliminates the need for manual timing adjustment while maintaining color picture display capability.

The patent replaces manual mechanical timing adjustment with an automated timing adjustment unit that uses detection and control mechanisms. Instead of physically adjusting the wheels manually, the system uses automated detection of wheel positions and electronic control of rotation timing to achieve synchronization, substituting mechanical adjustment operations with an automated control system.

The patent uses a yellow phosphor that emits both red and green wavelength bands when excited by blue light, allowing a single phosphor material to serve multiple color functions. The color separation wheel then separates these wavelengths, enabling one phosphor to replace what would traditionally require multiple phosphors, thereby improving brightness while managing system complexity.

The patent changes the wavelength parameters of the light emission system by using a yellow phosphor with broad emission spectrum covering both red and green regions. This parameter change in the phosphor material allows the system to achieve improved brightness and color development, with the color separation wheel subsequently separating the wavelengths for proper color display.