Electrochromic composition, anti-peep film, and display device

An anti-peep film, comprising:

• a first electrode layer;
• a second electrode layer disposed opposite to the first electrode layer;
• and
• an electrochromic layer located between the first electrode layer and the second electrode layer;
• wherein the electrochromic layer comprises a substrate and a plurality of electrochromic units embedded in the substrate, and two adjacent electrochromic units are separated by at least a part of the substrate;
• and,
• each of the plurality of electrochromic units comprises an electrochromic composition, and the electrochromic composition comprises:
• an acid-sensitive dye capable of switching between a transparent state and a colored state in accordance with a change of proton concentration in the electrochromic composition;
• an electrogenic acid capable of producing protons under an action of external electrons applied by a voltage;
• an ionic liquid composed of dissociated ions;
• and
• a solvent;
• wherein the acid-sensitive dye, the electrogenic acid, the ionic liquid, and the solvent are mixed together;
• and, when the proton concentration of the electrochromic composition is 0, the acid-sensitive dye is in the transparent state;
• and, when the proton concentration of the electrochromic composition is greater than 0, the acid-sensitive dye is in a colored state.

A display device, comprising a display panel and an anti-peep film located on a light-emitting side of the display panel;

• wherein the anti-peep film comprises:
• a first electrode layer;
• a second electrode layer disposed opposite to the first electrode layer;
• and
• an electrochromic layer located between the first electrode layer and the second electrode layer;
• wherein the electrochromic layer comprises a substrate and a plurality of electrochromic units embedded in the substrate, and two adjacent electrochromic units are separated by at least a part of the substrate;
• and, each of the plurality of electrochromic units comprises an electrochromic composition, and the electrochromic composition comprises:
• an acid-sensitive dye capable of switching between a transparent state and a colored state in accordance with a change of proton concentration in the electrochromic composition;
• an electrogenic acid capable of producing protons under an action of external electrons applied by a voltage;
• an ionic liquid composed of dissociated ions;
• and
• a solvent;
• wherein the acid-sensitive dye, the electrogenic acid, the ionic liquid, and the solvent are mixed together;
• when the proton concentration of the electrochromic composition is 0, the acid-sensitive dye is in the transparent state;
• and, when the proton concentration of the electrochromic composition is greater than 0, the acid-sensitive dye is in a colored state.