Projection device, projection method, and program
The projection apparatus enables simultaneous image and illumination projection by utilizing a light source unit, diffractive optical element, and polymer-dispersed liquid crystal unit to switch light transmission and diffusion, addressing the limitation of existing technologies and enabling compact, high-brightness, and wide-angle projections.
JP2026142635APending Publication Date: 2026-09-08CASIO COMPUTER CO LTD
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Patent Information
- Application Number
- JP2025029726
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-09-08
AI Technical Summary
Technical Problem
Existing projection apparatuses cannot simultaneously project both image and illumination light, with illumination light being limited to coherent light.
Method used
A projection apparatus comprising a light source unit, diffractive optical element, mask unit, polymer-dispersed liquid crystal unit, and control unit that switches between diffusion and transmission of light to achieve both image and illumination projection.
Benefits of technology
Simultaneous projection of images and illumination light is achieved, with a wider illumination range and compatibility allowing for a smaller and lighter device design.
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Abstract
The goal is to achieve both image projection and illumination projection simultaneously. [Solution] The projection device comprises a light source unit 31, a diffractive optical element 51, a display element 61, a polymer-dispersed liquid crystal unit 62, and a control unit. The light source unit 31 includes laser diodes 31R, 31G, and 31B that emit light in a predetermined wavelength band. The diffractive optical element 51 diffracts the light emitted from the laser diodes 31R, 31G, and 31B. The display element 61 transmits at least a portion of the light diffracted by the diffractive optical element 51 to form an image. The control unit switches between diffusion and transmission of the light transmitted through the display element 61 that is incident on the polymer-dispersed liquid crystal unit 62.
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