What is the brightness and response time of dot matrix liquid crystal?
Brightness dot matrix LCD screen is a substance between solid state and liquid state. It cannot emit light by itself and requires additional light sources.
Therefore, the number of lamps is related to the brightness of the liquid crystal display.
The earliest liquid crystal display only has two upper and lower lamps. Up to now, the lowest popular type is four lamps, and the high-end is six lamps.
The design of the four lamps is divided into three types: one is that there is a lamp on each of the four sides, but the disadvantage is that there will be black shadows in the middle. The solution is to arrange the four lamps from top to bottom, the last one is the 'U' type of placement, which is actually two tubes produced by two lamps in disguised form.
The design of the six lamps actually uses three lamps. The manufacturer bends all three lamps into a 'U' shape and then places them in parallel to achieve the effect of the six lamps.
Response time dot matrix LCD response time refers to the reaction speed of the LCD to the input signal, that is, the reaction time of the LCD from dark to bright or from bright to dark, usually in milliseconds (MS)Is the unit.
To make this clear, we also need to start with the human eye's perception of dynamic images.
There is a phenomenon of 'visual residue' in human eyes, and pictures moving at high speed will form a short impression in human brain.
Cartoons, movies, etc. until now, the latest games have applied the principle of visual residue to make a series of gradual images quickly and continuously display in front of people's eyes, thus forming dynamic images.
The display speed that people can accept is generally 24 frames per second, which is also the origin of the playback speed of 24 frames per second. If the display speed is lower than this standard, people will obviously feel the pause and discomfort of the picture.
According to this index calculation, the display time of each screen needs to be less than 40 MS.
In this way, for liquid crystal displays, the response time of 40ms becomes a barrier, and displays below 40ms will have obvious 'tailing' or 'ghosting' phenomena, which make people feel chaotic.
If you want the image to be smooth, you need to reach a speed of 60 frames per second.