Which screen technology relies on both glass and polycarbonate layers?

The correct answer involves understanding the structure and functionality of resistive touch screens. These screens typically consist of multiple layers, including a glass layer and a polycarbonate layer. The glass layer provides durability and clarity, while the polycarbonate layer is flexible and allows for pressure to be applied on the surface of the screen.

When a user interacts with a resistive touch screen by applying pressure, the two conductive layers (which can be made from a transparent material) are brought into contact, allowing a circuit to complete and the device to recognize the touch. This technology relies on the physical pressure to detect input, explaining the need for both glass and polycarbonate to provide the right balance of resistance and durability.

In contrast, capacitive touch screens utilize a single glass layer with an electrical charge for touch detection, while OLED displays are focused on the technology behind image production and do not require layers for touch sensitivity. Infrared touch screens use a grid of infrared LEDs and sensors to detect touch, meaning they do not involve the layered structure that combines glass and polycarbonate in the same way.