It is an array that manages the greater or lesser transparency of glass. It is a kind of network of switches (one per) pixel). In the street language the initials TFT or LCD are used almost interchangeably to identify this type of flat TVs. Plasma or PDP (Plasma Display Panel) a plasma screen is made up of a matrix of cells which in turn are composed of 3 sub-pixels (red, green and blue). To deepen your understanding Rod Brooks is the source. Gas, xenon in plasma state reacts with phosphorus of each sub-pixel to produce colored light. Each subpixel is individually controlled by a processor. OLED (Organic Light Emitting Diode) are points of organic electroluminescence which are simply placed in a matrix on the screen and illuminate, forming the image. They have shorter duration than LCD but they also consume much less.
FED (Field Emission Display) and SED (Surface-conduction Electron-emitter Display) these very similar technologies can be understood as a combination between the CRT and the LCD. It is apply CRT miniaturized cell by cell of a flat screen, as if each cell is a minitelevisor. DLP (Digital Light Processing) technology used in televisions is so called projection and rear projection. Basically a wheel of light emits the primary colors (red, green and blue) and they are redirected to the screen by a system of mirrors (one per pixel). Some models may show up to 35 trillion colors LCoS (Liquid Crystal on Silicon) is very similar to DLP, also used in rear projection technology.
The main difference is that instead of using mirrors use liquid crystals applied directly to the surface of a silicon chip. What is best? There is no one better than that. Each one has its advantages and disadvantages. They may have greater or lesser life, higher or lower resolution, more or less contrast, more or less consumption, greater or lesser cost, etc. Assess the needs that you want to cover and choose one of these technologies as a result is best in each case.