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A reflective metasurface display device and color image display method

A display device and display method technology, applied in instruments, nonlinear optics, optics, etc., can solve problems such as large energy loss in the blue light band, inability to cover red, green, and blue narrowband filtering, and difficulty in realizing full-color display, etc. The effect of wide color gamut and wide application prospects

Active Publication Date: 2021-01-26
SOUTHEAST UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In the current existing technology, the color filter of plasmonic display usually adopts sub-wavelength grating or metasurface structure. Among them, the pixel size of the metasurface structure is smaller, but the existing technology cannot realize narrow-band filtering covering red, green and blue. Especially in the blue light band, the energy loss is huge, and it is difficult to achieve full-color display

Method used

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  • A reflective metasurface display device and color image display method
  • A reflective metasurface display device and color image display method
  • A reflective metasurface display device and color image display method

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Embodiment

[0049] The metal metasurface layer is V-shaped, the single antenna period is 200nm, and the thickness is 30nm; the buffer layer thickness is 5nm; the ITO film thickness is 5nm; the modulation layer thickness is 150nm; the metal reflection layer thickness is 130nm; the base layer thickness is 300nm. Both the metal metasurface layer and the metal reflective layer are silver, and its refractive index is set according to the common metal refractive index table given by Palik; the material of the buffer layer is MgF2; the dielectric constant ε of ITO satisfies the Drude model, where ε ∞ , ω p and Γ are the permittivity, plasma vibration frequency, and relaxation frequency of infinite frequency, respectively, and the values ​​are 4.55, 2.0968×1015rad / s, and 724.6THz, respectively. ω is the angular frequency, which is determined by the wavelength of the incident light. The modulation layer material is organic crystal DAST (4-dimethylamino-N-methyl-4-stilbazolium tosylate), its resp...

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Abstract

The invention discloses a reflective metasurface display device and a color image display method. The device is sequentially arranged with a white light backlight source (101), a polarization beam splitter (102), a metal metasurface layer (103), and a buffer layer from top to bottom (104), ITO thin film (105), modulation layer (106), metal reflection layer (107), base layer (108), and this device also comprises DC voltage source (109); Wherein, described metal metasurface layer (103 ), buffer layer (104), ITO thin film (105), modulation layer (106), metal reflection layer (107) and base layer (108) together constitute a color filter structure; changing the external voltage source voltage can modulate the color and color of reflected light Brightness, through time-division multiplexing, to achieve color image display. The invention has the advantages of large color dynamic adjustment range, small pixel size, etc.; it has enlightening significance and broad application prospects in the fields of ultra-high resolution display and holographic imaging.

Description

technical field [0001] The invention relates to plasmon display technology, in particular to a reflective metasurface display device and a color image display method. Background technique [0002] Plasmon nanostructures and materials exhibit many special optical properties in light wave modulation, and have been applied in wavefront shaping, amplitude modulation, polarization state conversion, filtering and other fields. Plasmon nanostructures can be used to make ultra-thin color filters for projection display, three-dimensional display or holographic imaging to achieve ultra-high resolution imaging with pixel sizes on the order of microns or even nanometers. Today, optical imaging is becoming integrated and display devices are lightweight, showing huge potential application value. [0003] Traditional transmissive or reflective displays are large in size and weight. Each pixel consists of three sub-pixel units, which are respectively equipped with red, green, and blue colo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/03
CPCG02F1/0305G02F1/0311G02F1/0327
Inventor 郭静菁屠彦杨兰兰王莉莉张宇宁王保平张瑞文王垒石在耀
Owner SOUTHEAST UNIV
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