Broad spectrum displayer covering visible light to infrared wave band

[0035] A wide-spectrum display covering the visible light to infrared bands of the present invention is composed of arrayed display units. The display is composed of arrayed display units. Each display unit 1 may contain a single sub-display unit 16, or It may contain multiple sub-display units. The display unit 1 includes: a fluid chamber 2, a substrate 3, a first electrode 4, a dielectric layer 5, a barrier layer 6, a first liquid 7, a hydrophobic insulating layer 8, a second electrode 9, a plasma The excimer nano-film 11, the second liquid 12, the peripheral driving circuit 13 and the illumination layer 14. The positional relationship from top to bottom is the second electrode 9, the hydrophobic insulating layer 8, the fluid chamber 2, the barrier layer 6, the dielectric layer 5, the first electrode 4, the substrate 3, the illuminating layer 14, and the connecting first electrode 4 and The peripheral driving circuit 13 of the second electrode 9.

[0036] The fluid chamber 2 is composed of a first liquid 7, a second liquid 12 and a plasmon nano film 11. The plasmonic nano-film 11 is self-assembled by plasmonic nanoparticles 101 at the interface of the first liquid 7 and the second liquid 12. The first liquid 7 and the second liquid 12 are not miscible or slightly soluble.

[0037] The display unit 1 is based on the principle of electrowetting, and a voltage is applied between the first electrode 4 and the second electrode 9 through the peripheral drive circuit 13 to change the interfacial tension between the first liquid 7, the second liquid 12 and the dielectric layer 5. , Thereby changing the hydrophobic angle of the second liquid 12, so that the coverage area of ​​the second liquid 12 on the dielectric layer 5 changes, resulting in the self-assembled plasmonic nanoparticles 101 at the interface of the first liquid 7 and the second liquid 12 The spacing varies from 1 nanometer to 300 nanometers; using the local plasmon resonance effect of plasmon nanoparticles 101, when the spacing of plasmon nanoparticles 101 becomes smaller, the peak of its scattering spectrum will be red-shifted; When the distance between the plasmon nanoparticles 101 becomes larger, the peak of the scattering spectrum is blue-shifted, which realizes the dynamic tunability of the scattering spectrum of the plasmon nanoparticles and changes the color of the display unit.

[0038] The wide-spectrum display covering the visible light to infrared band of the present invention is based on the principle of electrowetting and the LSPR effect of plasmon nanoparticles, and can realize dynamic tuning of the scattering spectrum of plasmon nanoparticles. First, when no voltage is applied between the first electrode and the second electrode, the local surface plasmon resonance of the nanoparticle film at the two-phase interface is not obvious, and the color of the nanoparticle is reflected at this time; The peripheral driving circuit applies a voltage to change the interfacial tension between the first liquid, the second liquid and the dielectric layer, thereby changing the hydrophobic angle of the second liquid, so that the coverage area of ​​the second liquid on the dielectric layer changes, resulting in self-assembly in The distance between the nanoparticles at the interface of the first liquid and the second liquid is changed; using the LSPR effect of the nanoparticles, when the distance between the nanoparticles is changed, the scattering spectrum will be blue-shifted or red-shifted, realizing a new type of display with dynamically tunable spectrum. Second, the display unit can contain a single sub-display unit or multiple sub-display units. Since the nano-films formed by the self-assembly of different types and shapes of nanoparticles will show different colors, and the change of the nanoparticle spacing can also tune the spectrum, the display can use different types and different morphologies of plasmon nanoparticles With different SPR peaks, by changing the spacing of the nanoparticles, the spectrum adjustment range of the display is expanded. Third, the display unit is based on the mechanism of electrowetting and the LSPR effect of metal nanoparticles, and can adopt a single-layer or multi-layer structure to realize the color control of the display unit. Due to the LSPR effect of metal nanoparticles, the color seen by the naked eye of metal nanoparticles of the same type and morphology is different from the color seen under a microscope. The two colors are complementary colors, which can be used as microdisplays and used in anti-counterfeiting signs. .

[0039] The present invention is further illustrated by specific examples and comparative examples below:

[0040] The M×N array structure is prepared, and transparent electrodes are prepared on the substrate by photolithography, etching and other processes, and then the dielectric layer is prepared by ALD above, and the low surface stress polymer dielectric layer is prepared by the spin coating process. Subsequently, an M×N grid layer is prepared by nanoimprinting technology to form an array chamber structure, and the hydrophilic material of the spacer layer is generally a hydrophilic polymer material such as polyethylene glycol and polyacrylamide. The metal nanoparticles treated with surface ligands are self-assembled at the interface of the first liquid and the second liquid and then filled into the fluid chamber.

[0041] The prepared display unit array is connected to the peripheral driving circuit through the bottom electrode and the top electrode, and the display unit is controlled by the digital signal of the driving circuit.

[0042] After the preparation of a single display unit is completed, follow the above steps to continue to prepare multiple display units. Such repetition finally obtains a large-scale display unit array as a display device.

[0043] In addition, those skilled in the art can make other changes within the spirit of the present invention. Of course, these changes made in accordance with the spirit of the present invention should all be included in the scope of protection claimed by the present invention.