photochromic glass

Through three hands-on experiments, understand the principles of color change for different types of color changing glass. Composed of exhibit housing, light control device, and color changing glass shaping device. This exhibit the photochromic mechanism of silver halide photochromic glass, liquid crystal electrochromic glass, and thermochromic liquid crystal through hands-on experiments. The exhibit includes three interactive groups: 1. Visitors activate the lighting device to simulate sunlight shining on transparent glass. Observing the glass, they will find that it begins to darken and change color. After turning off the light, the glass returns to transparency, demonstrating the principle of photochromic glass; 2. Visitors click the start button to power on the glass, which displays a specific color. After the power is turned off, the glass returns to its transparent color, demonstrating the principle of LCD electrochromic glass; 3. Visitors place the seal on the heating table to heat it up, then place the seal on the operating LCD table. After waiting for a few seconds, they can see the corresponding pattern on the seal and display it.

Interaction type: Interactive installation. The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

1. The photochromic mechanism of silver halide photochromic glass is to use the photochemical reaction of silver halide in glass with special chemical composition under light radiation conditions, which decomposes into metallic silver and absorbs light, coloring the glass. After removing the light, halogen atoms combine with metallic silver to form transparent silver halide crystals, causing the glass to fade. 2. Electrochromic glass is made by adding a conductive medium between two glass substrates, and changing the color and transparency of the intermediate medium by applying an electric field or current, thereby altering the color state of the glass. After applying voltage to the conductive layer of glass, ions in the ion storage layer pass through the electrolyte layer and enter the electrochromic layer, where they react chemically with the material in the electrochromic layer, resulting in the glass exhibiting a specific color. The magnitude of the voltage will affect the amount of ions entering the electrochromic layer, and adjusting the color depth can be achieved by controlling the magnitude of the voltage.