The invention discloses a standard
dot matrix light source and an image point
correction method of a light-emitting
diode (LED) display screen. The method comprises the following steps of: A, constructing the standard
dot matrix light source, and calibrating the brightness and the chroma of the standard
dot matrix light source; B, acquiring image data of the
LED display screen, and the brightness and the chroma of the standard dot matrix light source; C, comparing the acquired brightness and chroma of the standard dot matrix light source with a stored value to obtain an error compensation matrix, and converting the image data of the
LED display screen from a relative value into an absolute value; D, analyzing the converted image data of the
LED display screen to generate a data correction
coefficient matrix; and E, outputting the data correction
coefficient matrix to an image point correction processor to perform image data correction
processing so as to obtain corrected image data according to the data correction
coefficient matrix, and finally outputting the corrected image data to an LED
large screen display
system. The standard dot matrix light source and the image point
correction method can overcome adverse effects caused by working condition drifting of a camera to ensure that the LED display screen has better light-color consistence and white balance after performing the image point correction; and an additional light
colorimeter is not needed, and a plurality of times of tests are not performed any more.