LED display and LCD display
LED display and LCD display are currently more common video displays on the market, LCD display is more used in TV, that is, people often say LCD TV, and LED is more used in commercial advertising video display and stage performance background collocation. To judge which is better, LED display or LCD display, we must first understand the difference between the two.
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First, the concept of LED display and LCD display
LED is the abbreviation of semiconductor light-emitting diode (Light Emitting Diode), LED display is composed of many small LED module panels, each LED module panel, also known as LED display module, is composed of many LED point pixel matrix arrangement, the distance of each LED point pixel is called point spacing. Under normal circumstances, the point spacing below P5 (including P5) is used indoors, and the point spacing below P2 is called a small-pitch LED display, such as P2, P1.875, P1.667, P1.583, which is used in places where the indoor viewing distance is relatively close; The pixel pitch above P5 is often used outdoors, and the point spacing such as P8, P10, P16 is often used outdoors LED display specifications.
LCD is the abbreviation of liquid crystal display, which is composed of a certain number of color or black and white pixels, placed in front of the light source or reflection. Liquid crystal is a special substance between solid and liquid, it is an organic compound, liquid under normal state, but its molecular arrangement is as regular as solid crystals, hence the name liquid crystal. The main working principle of LCD display screen is to stimulate liquid crystal molecules to generate points, lines, surfaces and back lamps to form a picture.
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Second, the difference between LCD and LED is mainly as follows:
1. Contrast
The LED LCD screen can change the intensity of the light very quickly, so the backlight brightness can be adjusted locally according to the brightness needs of the local image, so the dark image can be darker, and the dynamic contrast can be much higher than the LCD LCD screen. Especially for direct LED backlighting, the improvement of dynamic contrast is more obvious.
2. Size
The use of LED LCD screen backlight can reduce the thickness, volume, and weight of the TV, and the side illuminated LED LCD screen (edge LED) can reach less than 1cm.
3. Energy consumption
The LED LCD screen backlight itself saves power compared with the LCD LCD screen in medium and low luminosity, and the LED LCD screen is dynamically dimmed according to the screen image, and the LED LCD screen backlight can save up to 20%-50% of power consumption.
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4. Color gamut
The direct LED LCD screen backlight with independent three primary color LCD screens has a wider color gamut than the LCD screen.
5. Lifespan
The life of the LED LCD screen backlight is much longer than that of the LCD screen.
6. Environmental friendliness
LED LCD screen backlight is more environmentally friendly than LCD LCD screen. The LED LCD screen backlight is lighter in weight and consumes less fuel when transporting. LED LCD screens are more environmentally friendly than LCD screens when disposed of because LCD screens contain trace amounts of mercury. The longer life also reduces the generation of waste.
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Third, LED display or LCD display, which is better?
1. In terms of clarity and brightness, the refresh rate of LED display is much higher than that of LCD display, and the clarity and brightness are more advantageous than LCD displays. And the LED display can still be displayed very clearly under the strong light of the direct sun, and its screen display brightness will be automatically adjusted according to the brightness of the outdoor environment to achieve an excellent video display effect.
2. Energy consumption, LED display as far as its LED light source is concerned, is energy-saving and environmental protection products, semiconductor light-emitting diode LED is the current technical level of extremely energy-saving and a very wide range of applications of the light source, LED display energy-saving effect is LCD display 10 times, that is, the same configuration conditions, LCD than LED power consumption 10 times.
3. Viewing angle, LED display can reach a relatively large viewing angle, 165° viewing angle, video display is still clear. The viewing angle of the LCD is very limited, and the viewing angle is slightly larger, it will not be clear to see, and the video will become more blurry.
4. Contrast ratio, high-quality LED display, contrast ratio up to 3000:1, while the contrast ratio of high-quality LCD display under the same configuration conditions is only about 350:1, that is to say, LED display is nearly 10 times stronger than LCD display screen reproduction.
5. Splicing of display, LED display can realize seamless splicing of large screens, and according to the needs of the project, splicing various shapes of displays, such as LED shaped screen, LED cube screen, arc, circle, column and polygon and so on. The LCD splicing, each LCD module will have a relatively large gap, if the viewing distance is far, but still feel nothing, but if the viewing distance is slightly closer, the gap of the LCD large screen is more obvious, the display effect is greatly reduced, and the LCD display is difficult to splice into other shapes of video display, which is also the LED display has more advantages than the LCD display.
6. Scope of use, LED display screen is widely used, it can be used for advertising video promotion, indoor and outdoor stage performance, live release video display, business conference video speech, gymnasium video promotion and major evening background matching and so on. The scope of use of LCD display is relatively single, generally used to watch a distance of advertising, more LCD displays are applied to TV displays, that is, people often call LCD TVs.
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In addition to the above advantages, LED displays have more advantages than LCD displays in terms of service life, display color, exquisite appearance and production process. Which is better, LED display or LCD display? From the above comparison, we have already got the answer, obviously LED display is much better than LCD display. Compared with LED displays, the only advantage of LCD displays is that they are cheaper and lower cost than LED displays, which is the main reason why LCD displays cannot be completely replaced by LED displays.