What is the working response time of the display screen? For some high-definition images, usually a few milliseconds, a normal image display is not needed for static images: the time is around 16-5ms.
Response time is usually measured in milliseconds, which refers to how quickly the LCD screen responds to an input signal. That is, the time from dark to bright or from bright to dark for the liquid crystal particles is divided into "rise time" and "fall time". Generally speaking, response time refers to the sum of the two. The response time of mainstream LCD monitors on 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, that is, the response speed of each pixel to the input signal. In other words, the time it takes for a pixel to change from dark to bright or from bright to dark (the principle is to apply a voltage to the liquid crystal molecules to twist and restore the liquid crystal molecules) is usually calculated in milliseconds (MS), commonly referred to as 25ms and 16ms refers to the reaction time. The shorter the reaction time, the less tail the user feels when watching moving pictures.
The selection of Cr and Dr static images does not require high response time for medical display screens, but in system configurations that play dynamic images, such as cardiovascular machines and digital gastrointestinal machines, medical image display screens with a response time of less than 25ms should be preferred .
Of course, the corresponding working time of the LCD screen is also related to its backlight!
Conventional LCD screens use CCFL (Cold Cathode Fluorescent Tube) backlighting. There are two main backlight designs for CCFLs: "side entry" and "direct entry". However, in the side entry type, the light loss rate is high due to the light guide design, which further impairs the backlight brightness. The larger the panel size, the lower the brightness.
Cold cathode fluorescent lamps are the most commonly used backlight sources in liquid crystal displays. Industrial Displays In the field of application, the lifespan of CCF backlights is generally at least 50,000 hours, or half as bright as new backlights.
In many consumer applications, it takes only 10,000 hours to reduce backlight brightness to half its original brightness. Since consumer applications do not require continuous operation of the display, 10,000 hours of CCF backlight life is sufficient.
However, this is not the case in most industrial and medical applications. Compared with LCD, the lifespan of the backlight is very low. People are trying to double the lifespan of backlights. However, in most industry display applications, CCF backlights have a minimum lifetime of 50,000 hours.
LCD screen module working response time and backlight life?
2022 06/20