3m Innovative Properties Company

Xiaohui Cheng

Andrew John Ouderkirk

Joseph Clark Carls

Seong Taek Lee

Yeow Leng Teo

Kin Sheng Chan

Yarn Chee Poon

Zhisheng Yun

Philip Edwin Watson

Stephen J Willett

Kim Leong Tan

Ravi Palaniswamy

Arokiaraj Jesudoss

Kim L Tan

Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, polarizing beam splitters and systems with such beam splitters that incorporate multilayer optical films and reflect imaged light towards a viewer or viewing screen with high effective resolution are described.

Polarizing beam splitters providing high resolution images and systems utilizing such beam splitters

The disclosure generally relates to beamsplitters useful in color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed beamsplitters and color combiners include a tilted dichroic reflective polarizer plate having at least two dichroic reflective polarizers tilted at different angles relative to incident light beams, with light collection optics to combine at least two colors of light.

Tilted dichroic polarizing beamsplitter

Titled dichroic polarizing beamsplitter

A light source combines colored light from different LED sources to provide white light output. Multiple LEDs emitting light at different peak wavelengths may be disposed on a flexible substrate, the LEDs being close to an aperture formed in the substrate. Multiple mirrors, including at least one dichroic mirror, are oriented to reflect light from the multiple LEDs into the aperture. The flexible substrate includes a dielectric layer having a cavity region and an adjacent neighboring region that is thicker than the cavity region. The aperture and the multiple LEDs are all disposed in the cavity region of the dielectric layer. An integrating rod may be coupled to the aperture to receive the reflected light from the multiple LEDs.

LED color combiner

The disclosure generally relates to color combiners, and in particular color combiners useful in small size format projectors such as pocket projectors. The disclosed color combiners include at least two tilted dichroic plates having at least two reflectors configured with light collection optics to combine at least two colors of light.

Tilted plate normal incidence color combiner with a polarizing beam splitter

Growing community of inventors

Singapore, Singapore

Xiaohui Cheng