1, luminescensprincip och strukturella skillnader
LED LCD: LED LCD, also known as light emitting diode liquid crystal display, is based on using LED (light emitting diode) as the backlight source. As a solid-state light source, LED has the characteristics of high efficiency, low power consumption, and long lifespan. In LED LCD, LED beads are evenly arranged on the back of the LCD screen, providing uniform and bright backlight for the LCD screen by illuminating the LED beads in different areas. When the liquid crystal molecules on the LCD screen twist under the action of an electric field, it changes the transmission and obstruction of light, forming an image. This display method gives LED LCD significant advantages in color performance, brightness, contrast, and other aspects.
TFT LCD: TFT LCD, also known as thin-film transistor liquid crystal display, relies on the use of thin-film transistors (TFT) as the switching elements for each pixel. The structure of TFT LCD is relatively complex, usually consisting of two parallel glass substrates with a liquid crystal layer sandwiched in between. On the glass substrate, TFT arrays and color filters were respectively installed. When current passes through a TFT, it changes the alignment direction of liquid crystal molecules, thereby controlling the transmission and obstruction of light and forming an image. Each pixel of TFT LCD is controlled by an independent TFT switch, enabling high-resolution and fine image display.
2, olika kontrollmetoder
LED LCD: The control method of LED LCD is relatively simple, mainly achieved by adjusting the brightness and color of LED beads to control the screen display. Due to the fact that LED serves as a backlight source, its brightness and color can be precisely adjusted, thus LED LCD has significant advantages in color expression, brightness uniformity, and other aspects. At the same time, as a Lysskälla i fast tillstånd, LED har egenskaperna för lång livslängd och låg effektförbrukning, vilket gör att LED LCD också har fördelar inom energibesparing och miljöskydd .
TFT LCD: Kontrollmetoden för TFT LCD är mer komplex . På grund av att varje pixel styrs av en oberoende TFT -switch krävs exakt spänningsstyrning för varje pixel att uppnå exakt justering av justeringsriktningen för flytande kristallmolekyler . Denna kontrollmetod gör det möjligt Nivåer . Under tiden stöder TFT LCD också flera visningslägen, såsom TN -läge, IPS -läge, etc ., för att tillgodose behoven i olika applikationsscenarier .}
3, prestanda och applikationsfält
LED LCD: LED LCD is widely used in large-sized display devices such as televisions, displays, and advertising machines due to its performance advantages of high brightness, high contrast, and high color saturation. At the same time, LED LCD also has characteristics such as low power consumption and long lifespan, making it significantly advantageous in terms of energy conservation and environmental protection. In addition, with the Kontinuerlig utveckling av LED -teknik, ljusstyrkan och färgprestanda för LED -LCD -skivor förbättras också ständigt, vilket ger användarna en mer realistisk visuell upplevelse .
TFT LCD: TFT LCD används i stor utsträckning i mobila enheter som smartphones, surfplattor, bärbara datorer osv. har också egenskaperna att vara lätt och bärbar, vilket gör det allmänt används i mobila enheter .
https: // www . tftlcdfactory . com/lcd/tft-lcd/4-3- tum
