Konica Minolta has been granted a patent for a wavelength conversion film that includes multiple dyes to absorb light and emit light at a longer wavelength. The film consists of a first dye that absorbs red light and a second dye that absorbs the energy from the first dye and emits light in the near-infrared region. GlobalData’s report on Konica Minolta gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Konica Minolta, E-transaction user interfaces was a key innovation area identified from patents. Konica Minolta's grant share as of September 2023 was 24%. Grant share is based on the ratio of number of grants to total number of patents.
Wavelength conversion film using multiple dyes for emitting longer wavelength light
A recently granted patent (Publication Number: US11774653B2) describes a wavelength conversion film that can be used in various applications. The film is composed of two or more dyes that absorb irradiation light and emit light at a longer wavelength. One of the dyes has a maximum absorption wavelength in the red light region, while the other dye absorbs the excitation energy of the first dye and emits light in the near-infrared region.
The patent claims specify that the maximum light emission wavelength of the near-infrared light emitted from the film falls within the range of 700 to 1500 nm or 750 to 1400 nm. This indicates the flexibility of the film in emitting light within specific wavelength ranges.
The wavelength conversion film is intended to be used in a light-emitting member that includes a surface light source emitting red light. One example of such a light-emitting member is an organic electroluminescence element. Additionally, the film can be incorporated into an authentication device, which could potentially be used for biometric authentication by imaging a wrist vein.
The patent also describes a wristband-type electronic apparatus that includes the aforementioned authentication device. This wristband-type electronic apparatus performs biometric authentication and includes a light source and an imager. The light source can be located anywhere on the wristband, as long as it is on a different plane than the imager.
Furthermore, the patent mentions a biometric device that incorporates the light-emitting member with the wavelength conversion film. This biometric device can be a pulse oximeter for measuring on the wrist or finger root, or a pulse wave sensor for the same purpose.
Overall, this granted patent introduces a wavelength conversion film that can be used in various applications, including light-emitting members, authentication devices, wristband-type electronic apparatuses, and biometric devices. The film's ability to convert irradiation light into light of a longer wavelength opens up possibilities for improved functionality and performance in these applications.
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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
