The digital signage display is the most eye-catching part of the entire digital signage system. As the hardware part of the system, how do we deploy and choose? Is it plasma and LCD or something else?
Use of LCD screen
As the price of liquid crystals drops, what will be the best applications for liquid crystals? Generally there is such a rule, if you plan to use a static screen, then the LCD screen is the first choice. For example: when using a digital display in a fast food restaurant, a menu display board is usually hung above the cashier, and the corresponding food and price are displayed, because the price will change from time to time, and according to the advertisement, the restaurant will also introduce different cuisines , But because the restaurant will have the same text in the same area, after a few weeks, "burning screen" will appear on the plasma screen. Liquid crystal will be more suitable in this case. This is an example where static content will damage the plasma screen for a certain period of time. It also includes flight information, game scoreboards, financial electronic displays, news break information, and company logos, which will always stay on the display screen.
The more advantageous application of LCD over plasma is in the billboards of fast food restaurants. Because the environment is high-brightness, plasma screens that take advantage of image quality will be completely eliminated. For the ambient light, some are direct sunlight outdoors, and some are strong light focused in front of the plasma screen. Liquid crystal can avoid this problem, because it belongs to a light-emitting screen and can be operated with a fluorescent back light source.
Use of plasma screen
Many analysts in the industry believe that plasma screens are better than LCD screens in the display of full-action video. This is mainly due to the fact that the plasma does not require a back light source. In a plasma screen, each pixel is a light source, and self-luminous, so the color jumps. If the pixel is black, because there is no light, it is truly pure black. For liquid crystals, the back-up light source makes the film different colors, but to make it black, you can only fill the pixels so that light cannot pass through. Therefore, compared with plasma screens, the disadvantage of liquid crystals is that black is not true. The color is black, and the color is not very dynamic.
Don Fasick, director of the South Korean Business Development Department of LG, said: "Plasma has more depth than LCDs that are developing in terms of high contrast, pure black, and pure color. If you need to change images frequently, you don’t need any static content. Plasma is more Good at it. In addition, plasma screens usually have a high refresh rate and are better than liquid crystals in fast-moving images. Therefore, based on the above characteristics, plasma screens are the first choice for indoor entertainment venues. For home theaters, plasma is also First choice. Provide pictures that are better than LCD, especially fast-moving pictures, such as a baseball flying 100 mile-hours, which is very clear. Of course, LCD technology is also developing very quickly." Therefore, for individuals, if it is applied to home theater , Plasma can be selected. In sports video, plasma has better quality in color and speed, and has good video quality.
Regarding the use of plasma and liquid crystal technology, how to choose the correct screen for the digital signage system depends on the purpose of the system. According to the technical strengths and weaknesses of the two, they are applied to different digital signage fields. For example: What is your purpose for installing digital signage? how to use? Do you want the function of customer communication? Applied to education? Used in entertainment? How to divide the content of the system? Is it displaying static content or moving video? In addition, there is also the external environment of the display screen. Is it installed in a high-brightness environment (such as outdoor)? Is it installed in a dark corner of the room?
Experts said that display technology is as important as content. Some customers are unwilling to spend too much on the display screen, and a few months later found out that the screen can no longer transmit information or even work. Therefore, if you want to send a message, you must choose the right screen. Generally speaking, to highlight the environment and display static content, you can consider choosing the LCD screen. If the dynamic video display is the core part of the whole system, and it is a dynamic picture, the integration of the plasma screen and the system is better.
Of course, there are exceptions to these rules. Because the digital signage technology, as a cutting-edge technology, is constantly changing. As the screen size becomes larger and smaller, the picture quality and resolution continue to improve. Display screen manufacturers are constantly using various methods to eliminate color saturation and shortening. Pixel response time and reduce the power consumption of a single product. For example: Samsung recently launched the world’s largest mass-produced 82-inch LCD monitor 820Dxn. The product is 1.92 meters high, weighs 150 kilograms, and has a standby power consumption of less than 1W. Brightness 600cd/m2, contrast ratio 1500:1, response time 8ms, can work continuously for more than 20 hours under high brightness, suitable for public information display.
