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Summary

        LCD and LED display have been compared for the longest time. This article aims to provide collected data to know what is better. Both displays came from the same technology. But, one is surely more advanced than the other. At the end of this article, you will know how the two differ and how one is better.

LCD

        LCD or Liquid Crystal Display was invented by Richard Williams in 1962. LCD makes use of a liquid crystal to produce a visible image (Elprocus.com, 2020). This type of display is super-thin technology display screens that are generally used in laptop computer screens, TVs, cell phones, and portable video games. Its display is much thinner when compared to a cathode ray tube (CRT) technology. LCD works on the principle of blocking light rather than emitting light. It requires a fluorescent backlight, whereas on the front side, there are many colored squares that will be turned ON/OFF.

Also, LCDs consume much less power than LED and gas-display displays (Rouse, 2020). LCDs are made with either a passive matrix or an active matrix display grid. The active matrix LCD is also known as a thin film transistor (TFT) display. The passive matrix LCD has a grid of conductors with pixels located at each intersection in the grid. An active matrix has a transistor located at each pixel intersection, requiring less current to control the luminance of a pixel (Woodford, 2020). With this said, the current in an active matrix display is switched on and off more frequently, improving the screen refresh time.

LED

        The first practical Light Emitting Diode or LED was invented in 1962 by Nick Holonyak, Jr at General Electric. (LaMarco, 2019). This type of technology is not only useful as the main display screen, but also an interaction medium of touch screen. Generally LED television is just a special kind of LCD where the backlight consists of LEDs. These televisions are far more energy efficient than CCFL and are a lot smaller.

LED is a screen display technology that makes use of a LED panel as the light source (Techopedia.com, 2017). Now, numerous electronic devices use LEDs such as mobile phones, TVs, tablets, computer monitors, laptops screens, etc., use a LED display to display their output.

        The distance at which you can see the images on an LED display clearly is called the minimum viewing distance (Jetstarked.com, 2021). To find the optimal viewing distance, take the pixel pitch of the screen, multiply by eight, and convert to feet. The rule of thumb is that the minimum viewing distance for an LED video wall is 1 meter for every millimeter of pixel pitch. But what is pixel pitch? It is the distance in millimeters from the center of a pixel to the center of the adjacent pixel. Simply put, it is the distance between pixels. A smaller pixel pitch means there is less empty space, thus creating improved screen resolution. But, additional pixel density is intended for a closer viewing distance. If there is a greater viewing distance, higher pixel density loses its visual advantages and simply increases the cost of the display.

Conclusion

        In the question, “Which is a better choice, an LCD or LED?”, based on the following data that was collected, LED has more advantages than the LCD. Basically, LED is just a specific type of LCD. But since buyers opt for the more efficient and low-cost technology, LED was made. Both technologies have the same principles, but LED is just a better backlight than fluorescent lights. Thus, LED is the better choice.

Sources:

Cabading, Z. (2020). How to Know the Differences Between an LED Display and LCD Monitor. Retrieved from https://store.hp.com/us/en/tech-takes/differences-between-led-display-and-lcd-monitor.

Elprocus.com (2020). What is an LCD Display : Construction & Its Working. Retrieved from https://www.elprocus.com/ever-wondered-lcd-works.

Kennemer, Q. & Waniata, R. (2020). LED vs. LCD TVs explained: What’s the difference?. Retreived from https://www.digitaltrends.com/home-theater/led-vs-lcd-tvs.

LaMarco, N. (2019). How Does an LED TV Work?. Retrieved from https://smallbusiness.chron.com/led-tv-work-26798.html.

Rouse, M. (2020). LCD (Liquid Crystal Display). Retrieved from https://whatis.techtarget.com/definition/LCD-liquid-crystal-display.

Spectra-displays.co.uk (2020). How LCD and LED Screens Work. Retreived from https://www.spectra-displays.co.uk/blog/article/how-lcd-and-led-screens-work.

Techopedia.com (2017). LED Display. Retrieved from https://www.techopedia.com/definition/14957/led-display.

Woodford, C. (2020). LCDs (liquid crystal displays). Retrieved from https://www.explainthatstuff.com/lcdtv.html.