What is the working response time of the display screen? For some high-definition images, it usually takes a few milliseconds, and static images do not require a regular image display screen: the time is around 16-5ms.
The response time is usually measured in milliseconds, which refers to the response speed of the LCD screen to the input signal. That is to say, the time from dark to bright or from bright to dark for liquid crystal particles can be divided into "rise time" and "fall time". Generally speaking, response time refers to the sum of the two. The response time of mainstream LCD displays in the market is less than 8ms. The response time of some high-end LCD screen products is even 5ms, 4ms, 2ms, etc.
Each LCD screen has a response time, which is the response speed of each pixel to the input signal. In other words, the time required for a pixel to turn from dark to bright or from bright to dark (based on the principle of applying voltage to the liquid crystal molecules to twist and recover) is usually calculated in milliseconds (MS), and the commonly referred to as 25ms and 16ms refer to this reaction time. The shorter the reaction time, the less tail the user feels when watching dynamic images.
The selection of medical display screens, Cr and Dr static images does not require high response time, but in system configurations for playing dynamic images, such as cardiovascular and digital gastrointestinal machines, medical image displays with response time less than 25ms should be preferred.
Traditional LCD screens use CCFL (Cold Cathode Fluorescent Tube) backlight. CCFL has two main backlight designs: "side entry" and "direct entry". However, in the side entrance type, due to the light guide design, the light loss rate is high, which further damages the backlight brightness. The larger the panel size, the lower the brightness.
Cold cathode fluorescent lamps are the most commonly used backlight source in liquid crystal displays. In the application field of industrial displays, the service life of CCF backlight is generally at least 50000 hours, or the brightness is half lower than the new backlight.
In many consumer applications, the backlight brightness can be reduced to half the original brightness in just 10000 hours. Due to the fact that consumer applications do not require continuous operation of the display, a CCF backlight lifespan of 10000 hours is sufficient.