18204544. LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS simplified abstract (Panasonic Intellectual Property Management Co., Ltd.)

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LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS

Organization Name

Panasonic Intellectual Property Management Co., Ltd.

Inventor(s)

Takamasa Yoshikawa of Osaka (JP)

Takao Yamashita of Osaka (JP)

Nao Morishita of Osaka (JP)

LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18204544 titled 'LIGHT SOURCE DEVICE AND PROJECTION DISPLAY APPARATUS

Simplified Explanation

The patent application describes a light source device that includes a light source unit, a polarization separation element, a phosphor, and a phase conversion element.

  • The light source unit emits first light in a first polarization direction and second light in a second polarization direction.
  • The polarization separation element receives the first light and the second light and reflects visible light with longer wavelength than a specific range.
  • The phosphor receives the first light transmitted through the polarization separation element and converts it into third light with longer wavelength.
  • The phase conversion element receives the second light reflected by the polarization separation element and phase-converts it into fourth light in the first polarization direction.
  • The polarization separation element combines the illumination light with the third light reflected by the polarization separation element and the fourth light transmitted through the polarization separation element.

Potential applications of this technology:

  • Lighting systems for various environments such as homes, offices, and public spaces.
  • Display technologies including LCD and OLED screens.
  • Automotive lighting for headlights and interior lighting.

Problems solved by this technology:

  • Efficiently separating and manipulating light of different polarization directions.
  • Enhancing the conversion of light to longer wavelengths for improved color rendering.
  • Combining different light sources to achieve desired illumination.

Benefits of this technology:

  • Improved energy efficiency by optimizing the conversion and utilization of light.
  • Enhanced color quality and rendering for more accurate and vibrant lighting.
  • Flexibility in designing lighting systems with different light sources and polarization characteristics.


Original Abstract Submitted

A light source device includes: a light source unit emitting first light in a first polarization direction and second light in a second polarization direction; a polarization separation element receiving the first light and the second light; a phosphor receiving the first light transmitted through the polarization separation element; and a phase conversion element receiving the second light reflected by the polarization separation element. The polarization separation element reflects visible light having a longer wavelength than a polarization transmission wavelength region. The phosphor converts the received first light into third light having a longer wavelength than the polarization transmission wavelength region. The phase conversion element phase-converts the received second light into fourth light in the first polarization direction. The polarization separation element combines illumination light with the third light reflected by the polarization separation element and the fourth light transmitted through the polarization separation element.

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