Casio Computer has been granted a patent for a light source unit that utilizes two light sources emitting different wavelength ranges. The unit includes dichroic mirrors to reflect and transmit light at specific incident angles, allowing for efficient light manipulation. GlobalData’s report on Casio Computer gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Casio Computer, AI for workflow management was a key innovation area identified from patents. Casio Computer's grant share as of May 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.
Light source unit with two light sources and dichroic mirrors

A recently granted patent (Publication Number: US12001130B2) discloses a novel light source unit designed for projection systems. The unit comprises multiple light sources emitting different wavelength ranges, dichroic mirrors to reflect and transmit light at specific incident angles, and a luminescent body for emitting light in a third wavelength range. The patent details the configuration of the light source unit, including the arrangement of light sources, dichroic mirrors, and the luminescent body on one surface side of the first dichroic mirror. Additionally, the patent describes the time-sharing emission of light in different wavelength ranges by the light sources, such as blue, green, and red wavelength ranges, for optimal projection quality.
Furthermore, the patent also covers a projection control system incorporating the described light source unit, a display device, a projection optical system, and a projection control unit. The projection control system utilizes the light emitted from the light source unit to form image light on the display device, which is then projected onto a target surface. The inclusion of a half-wave plate between the light sources and the dichroic mirror ensures that the polarization directions of the emitted light in different wavelength ranges are perpendicular to each other, enhancing the efficiency and quality of the projected image. Overall, the patent highlights an innovative approach to light source units and projection control systems, offering a detailed technical solution for improved image projection in various applications.
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