Device and method for automatic determination of white balance adjustment resistor of LED display screen

Abstract

The present invention provides a device and method for automatic determination of a white balance adjustment resistor of a LED display screen. The device provided by the invention comprises a brightness and color measurement device, a control and calculation assembly, and a resistance regulation device arranged between a full-color display module and the control and calculation assembly; the brightness and color measurement device is a programmable general luminosity and color measurement instrument which is a brightness and color measurement module being capable of communicating with the control and calculation assembly, and the programmable general luminosity and color measurement instrument is connected with the illumination photometer, the brightness colorimeter and the spectrometer of a communication module being capable of communicating with the control and calculation assembly and is connected with one of communication modules, through employing a luminosity sensor and a set of XYZ spectrum response coupling optical filters, capable of communicating with an electrical parameter measurement module and the control and calculation assembly; and the control and calculation assembly and the upper computer software of a display screen control system communicate through a protocol instruction. The device and method for automatic determination of a white balance adjustment resistor of a LED display screen is able to realize the automatic measurement of a white balance resistance value, is simple, fast, reliable and visual; and moreover, the resistance value of the resistance regulation device may be regularly calibrated and automatically corrected so as to guarantee the accuracy.

Description

technical field [0001] The invention relates to an LED display screen, in particular to a device and method for automatically measuring the white balance adjustment resistance of an LED display screen. Background technique [0002] The full-color display module of a light-emitting diode (Light Emitting Diode, abbreviated as LED) display screen needs to go through a process of measuring white balance resistance before mass production. The white balance resistor is divided into two types according to the manufacturer's printed circuit board (Printed Circuit Board PCB, abbreviated as ) module design. White balance resistor, one for each driver IC, is a necessary component; the other is the public white balance resistor for the entire full-color display module, a total of three, corresponding to the three colors of R, G, and B, which are determined by the manufacturer as needed The configuration is used to realize the control and adjustment of the maximum brightness and white b...

AI Technical Summary

Problems solved by technology

The whole process is manually operated, with low efficiency and many uncertain factors, and requires very high experience for the operator, especially the resistance value of the variable resistor is often different from the nominal value, and changes with the time of use. Often cannot be effectively calibrated in operation

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