LED is shortened for Light Emitting Diode and an LED display is similar to the monitor which displays where the light source comprises light emitting diodes. This is a well known technology used today and in many electronic devices such as smartphones, tablets, laptops, computer monitors, and televisions. It is quite helpful as the main display screen and also as the medium of interaction between the user and the device, just as in touch screen.
Let’s Go Back to the History of LED
Captain Henry Joseph Round was the first man who recoded the diode emitting light in the year1907, a century and a decade ago. This was the extraordinary discovery which has brought the change in the history of electronics. Later there was the invention of light emitting diode by Nick Holonyak in the year was invented in 1962. Later by 1960s LEDs became commercially available but only in red color.
The red coloured LEDs were not extremely bright ad they were used as indicators. However, LED started coming in more colors and were used to a high extent in so many electrical equipments and appliances. With the advancement in technology, the luminosity of LEDs enlarged, and they became very bright to be used as light sources.
A curious person always yearns to know how a specific thing works. Same with the LED TV, how it exactly words may be in mind of the many. However, to have exact and correct knowledge about working of the LED TVs, it is crucial to learn about the latest television display technologies available in the market.
Let’s begin with Plasma Television
There was the time when plasma televisions were quite popular and still many use this technology. But now, Plasma televisions no longer manufactured and have been replaced by OLED TVs. Their design is important to understand the LED TV working principle and why LED televisions developed.
The plasma television consisted of tiny cells of noble gases (Neon and Xenon) are excited and convert into the plasma state. In this state, the subatomic components of Neon and Xenon gases emit ultraviolet lights. The ultraviolet light is not visible. There are tiny phosphors inside those cells absorbing the ultraviolet light and then re-emit the light in the spectrum. This is the reason, you see as the viewer of the television. Each pixel has three smaller pixels emitting red, blue, or green light. For brighter light, the gas is excited to the high degree. All these three colors combined in different proportions for producing all the colors seen in the television.
Early Plasma Technology
Due to the nature of light production, the pixels are excited which causes them to flicker. Initially, this flickering was visible to the naked eye but later with higher end models the flickering happens faster. Plasma display technology emits its own light. For the display of the black, the pixels in the associated area will not be emitted at all. The pixels stop emitting light when excitement stops which makes image change a smooth. Image retention is the biggest disadvantage of plasma TVs which happens when the same image is there on the plasma display for the longer time. Though technology has improved the situation but image retention was still the same until and unless the image was on display for many days at a time.
How LED TVs Works?
An LED TV is one of its own kinds of LCD where the backlight has LEDs in place of CCFLs. This is the main principle behind the working of LED TV technology. LED TVs have efficient energy as compared to CCFL. Also, LED TVs are smaller and thin in comparison to other types of televisions. LED television is a new kind of television and a special kind of LCD television in which the backlight is made of LEDs. The ace picture quality of LED television makes it unique and different from others.