Color changing device, display module, manufacturing method thereof and display control method

A display module, comprising:

• a liquid crystal display, the liquid crystal display comprising an array substrate, a color filter substrate arranged opposite to the array substrate to form a cell, and a liquid crystal layer arranged between the array substrate and the color filter substrate, the liquid crystal display being provided with a plurality of pixel units arranged in a matrix form, each pixel unit comprising a plurality of subpixel units in different colors, each subpixel comprising a color filter block arranged on the color filter substrate;
• a transparent electrode arranged at a side of the color filter substrate away from the array substrate;
• a plurality of color sensors arranged between the color filter substrate and the transparent electrode, corresponding to the color filter blocks on the color filter substrate respectively, and configured to collect a color of a corresponding subpixel;
• a transparent insulation layer arranged at a side of the transparent electrode away from the color sensors and provided with grooves corresponding to the color filter blocks on the color filter substrate respectively and spaced apart from each other;
• gold nanoparticles filled in the grooves and electrically connected to the transparent electrode;
• a plurality of electrode sheets covering the grooves, coated with silver ions and insulation from each other;
• a single chip microcomputer;
• and
• a plurality of time controllers electrically connected to the transparent electrode and the electrode sheets,
• wherein each color sensor is configured to transmit color information about the collected color of each subpixel to the single chip microcomputer,
• the single chip microcomputer is configured to transmit the color information to the corresponding time controller, and
• each time controller is configured to apply a predetermined voltage between the transparent electrode and the electrode sheet corresponding to the subpixel within a power-on time period corresponding to the color in accordance with the color information received from the single chip machine.

A method for manufacturing a display module, comprising steps of:

• forming a plurality of color changing blocks at a surface of a color filter substrate away from an array substrate, the color changing blocks being spaced apart from each other and corresponding to subpixels of the display module respectively;
• and
• forming a color sensor at a light-exiting side of each subpixel,
• wherein the step of forming the plurality of color changing blocks at the surface of the color filter substrate away from the array substrate comprises:
• forming a transparent electrode at a surface of the color filter substrate away from the array substrate;
• forming a transparent insulation layer on the transparent electrode and forming a groove in the transparent insulation layer;
• filling gold nanoparticles into the groove, the gold nanoparticles being electrically connected to the transparent electrode;
• and
• forming an electrode sheet coated with silver ions and covering the groove,
• wherein in the case that an electrochemical reaction occurs, the silver ions on the electrode sheet are capable of being reduced into silver and deposited onto the gold nanoparticles, and
• the electrode sheets of different color changing blocks are insulated from each other.