Why is plasma TV eliminated? Why is plasma TV discontinued?
**Plasma TV Structure and Imaging Principle**
Plasma TVs work on a completely different principle compared to LCDs. Instead of using a backlight, each pixel in a plasma display emits light on its own. Inside the TV, there are tiny glass cells filled with inert gases like neon or xenon. These cells are arranged in a grid across the screen. When an electric current is applied, the gas inside the cells ionizes and produces ultraviolet (UV) light. This UV light then excites phosphor coatings on the walls of the cells, causing them to glow in red, green, or blue. By combining these three primary colors, the TV can create a full range of colors.
Each pixel in a plasma TV consists of three separate gas chambers, one for each color. The cells are controlled by a circuit that determines when and how much each cell should light up, allowing for precise control over brightness and color. Unlike LCDs, which rely on liquid crystals to block or allow light from a backlight, plasma displays produce their own light, resulting in deeper blacks and more vibrant colors.
The development of plasma technology was driven by the need for thinner, lighter, and higher-quality flat-panel displays. In contrast to cathode ray tube (CRT) TVs, which were bulky and had limited size, plasma TVs offered large screens with a much thinner profile. Early CRT TVs used electron beams to scan across the screen, but this method required a long picture tube, making them heavy and difficult to manufacture in larger sizes. Plasma technology allowed for displays that could be as thin as 10 cm while still delivering high-resolution images.
Although plasma TVs were once considered the future of television, they eventually declined due to higher manufacturing costs, energy consumption, and the rise of LED and OLED technologies. Despite their advantages in image quality, plasma TVs became less competitive in the market, leading to their eventual discontinuation. However, their innovative approach to display technology paved the way for modern flat-screen TVs.
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