Response time of liquid crystal TFT Display Module

The so-called reaction time of each pixel LCD display of the input signal reaction speed, ie the pixels from dark to bright or dim light by the time needed ( the principle is the voltage applied to the liquid crystal molecules of the liquid crystal molecules twist and replies ) . Often say 25ms, 16ms is referring to the reaction time, the shorter the time to see if the user does not have a more dynamic picture shadow tail dragging feeling. The reaction time is generally divided into two parts: the rise time (Risetime) and fall time (Falltime), which means that when the sum of both prevail.



CRT monitors , as long as the electron beam hitting phosphor instantly luminous , while the residual glow very short time , so the traditional CRT monitors response time of only 1 ~ 3ms. Therefore, the reaction time in the CRT display is generally not been mentioned. And because the LCD display is the use of liquid crystal molecules twist control light off, while reversing the liquid crystal molecules is a process, so the response time is significantly longer than the liquid crystal display CRT.

25ms to 12ms from the early well-known 16ms then recently appeared , the reaction time is continuously shortened stereotypes are not suitable for liquid crystal displays and entertainment are being huge challenge. You can do a simple conversion : 30 ms = 1/0.030 = 33 per second display screen ; 25 ms = 1/0.025 = 40 per second display screen ;OLED Display 16 ms = 1/0.016 = 63 per display frames ; 12 ms = 1/0.012 = 83 per second display screen . As can be seen the birth of a great progress means 12ms LCD manufacture.

It should be noted that the LCD display has a scanning frequency of restrictions , especially for field frequency ( also known as refresh rate ) , many of which are limited to 75Hz or less , but in terms of general concepts , 75Hz refresh 75 means one second screen looks like this reach 12ms frames per second, corresponding to a 83 .

In fact , we said above, the 12ms response time is the time for switching between black and white screen required , this full white drive voltage required to switch the black screen is relatively high , it is more switching speed fast , up to 12ms; most of the practical applications of the switching gray screen ( LCD and its essence is not completely reversed , incomplete light transmission ) , the required driving voltage is relatively low , the switching speed is relatively slow. So together, in the gray screen refresh rate of 75Hz 12ms has to meet the needs of the Lcd display module .

According to the data showed that:
Reaction time = 30 ms = 1/0.030 per second display screen can display 33 , which is already able to meet the needs of DVD playback ;
Reaction time = 25 ms = 1/0.025 per second monitor can display 40 images, a DVD player and fully meet the needs of the majority of the game ;
While playing the kind of intense action game ( eg QUAKEIII/UT2003/DOMMIII), Speed ​​Pursuit and other games to be achieved if there is no ghosting , the screen displays the desired reaction time at 60 frames per second, the speed should be more than that required = 1 / 60 frames per second display screen capable of displaying = 16.6 ms.