In LCDs, a layer of liquid crystals is sandwiched between two sheets of glass. One glass layer serves as the substrate for Thin Film Transistors (TFTs) and another for the Color Filter Array (CFA). A separate light source (backlight) is required to make the image visible, with the crystals determining how much light passes through each subpixel. This technology is widely used in monitors, laptops and televisions.
OLED displays use a glass layer as a substrate for organic, light-emitting particles. Unlike LCD, they do not require a separate backlight or color filter layer because each pixel generates its own light and color. This results in thinner construction, higher contrast and deeper blacks. This technology is often used in high-end smartphones and televisions.
For touch functionality, an additional layer of glass with a conductive pattern is added, usually on top of the display stack. These sensors, often based on Projected Capacitive (PCAP) technology, detect the position of a finger or stylus. The glass must not only be strong and scratch-resistant, but also optically clear so as not to affect image quality.
The outer layer of virtually every modern display is a layer of chemically reinforced glass, known as cover glass. This glass protects the delicate internal components from scratches, impacts and everyday use. It is designed for maximum durability, clarity and sometimes features anti-reflective or dirt-repellent coatings.
A fundamental layer in both LCD and OLED displays is the glass substrate containing millions of Thin Film Transistors. Each transistor acts as an individual switch that controls the state of a subpixel (red, green or blue). The precision with which these microscopic components are applied to the glass is critical to the resolution and image quality of the screen.
In LCD technology, a glass plate with a Color Filter Array is essential for creating color. This layer consists of a pattern of millions of red, green and blue filters, perfectly aligned with the subpixels. The white light from the backlight is colored by these filters, then the liquid crystals control the intensity for each color to form the final image.
LCD displays use a complex sandwich of glass and films to manage light. Two polarizing films orient the light, while a layer of liquid crystals, controlled by the TFTs, modulates the light rotation for each pixel. This process determines how much light from the backlight reaches the color filters and ultimately the viewer's eye, which controls the brightness of each pixel.
At the heart of OLED technology is the use of organic materials that themselves emit light when current flows through them. These materials are applied to a glass substrate, eliminating the need for a separate backlight and color filter. Because pixels can be completely eliminated, OLED displays achieve perfect black levels and very high contrast.
At Dytos, we understand that each industry has specific requirements for touch solutions. That's why we offer a wide range of products and services designed to meet these diverse needs.
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