Liangfu Zhu

Title: Liangfu Zhu: Display and Optical-Expansion Inventions.

Introduction

Liangfu Zhu is an inventor based in Shenzhen, China. His work includes display technologies that use diffractive optical elements to expand light and present images. He is associated with Shenzhen Optiave Display Technologies Co., Ltd. His listed portfolio includes 2 patents.

Latest Patents

Zhu’s listed inventions include a display device for providing output light from one side and a display apparatus that uses a stack of expander devices.

The display device uses a waveguide plate and diffractive in-coupling and out-coupling elements. The in-coupling element directs input light into the waveguide, while the out-coupling element diffracts guided light outward to form image-bearing output light. Its out-coupling element has buried diffractive ridges and complementary regions with different refractive indices. The ridges have a slant angle between 20° and 70°.

The display apparatus combines an optical engine with a stack of expander devices. The optical engine produces input light beams representing an image, and the stack diffractively expands that light into output beams representing the same image. The first and second expander devices have corresponding diffractive elements with equal grating periods.

Career Highlights

Zhu’s listed work at Shenzhen Optiave Display Technologies Co., Ltd. is focused on display and optical-expansion technologies. The described inventions address waveguide-based light delivery and coordinated diffractive elements in stacked display systems.

Collaborations

His listed coworkers include Yisheng Zhu and Tapani Kalervo Levola.

Conclusion

Liangfu Zhu’s patent work centers on diffractive waveguide components and stacked optical expanders designed to deliver image-bearing light in display systems.