Method for adjusting brightness consistency of display screen

Abstract

The invention discloses a method for adjusting the brightness consistency of a display screen, which comprises the following steps of: connecting a light-emitting module with a driving IC (Integrated Circuit), arranging an adjustable resistor in the driving IC, debugging the resistance value of the adjustable resistor through debugging software, determining the resistance value by the brightness of a lamp tube, reading and writing a current value through the driving IC, reading and writing data through the debugging software, reading the resistance value of the resistor on the light-emitting module, and writing the set resistance value into the light-emitting module. By adopting the driving IC with the built-in resistor, the pulse width PMW value can be adjusted, the built-in resistance value of the driving IC can be adjusted, two parameters can be adjusted at the same time, the consistency of the brightness of the whole display screen can be achieved more easily on the premise that the brightness and the chromaticity are not lost, and the product is more energy-saving and reliable.

Description

technical field [0001] The invention relates to the technical field of display screens, in particular to a method for adjusting brightness consistency of a display screen. Background technique [0002] For a long time, due to the manufacturing process and other reasons, the characteristics of LEDs are very different. There is a 20% difference in the brightness of LED lights, that is, there are 20% differences in the three channels of red, green, and blue. And because of the cost pressure, it is generally believed that the light spots with a wavelength difference of 5nm are qualified. When the display modules made of these different LEDs are integrated into LED displays, if these differences are not sufficiently compensated, the differences in brightness and color of the LED display will be clearly visible; at the same time, the LED display is installed After using for a period of time, the brightness and chromaticity of the LED will decay and change with time, which will ca...

AI Technical Summary

Problems solved by technology

When the display modules made of these different LEDs are integrated into LED displays, if these differences are not sufficiently compensated, the differences in brightness and color of the LED display will be clearly visible; at the same time, the LED display is installed After using for a period of time, the brightness and chromaticity of the LED will decay and change with time, which will cause the visual quality of the LED display to be greatly reduced; in addition, the replacement of the damaged LED module during the use of the LED display will lead to the replacement of the new module with the LED display. If the entire screen does not match, it will greatly reduce the visual quality of the LED display

[0003] like figure 1 As shown, the conventional light-emitting module adopts the mode of driver IC + external fixed resistor, the resistance value of the display screen cannot be adjusted during use, and when the display screen is in use for brightness consistency debugging, only the pulse width PMW value can be adjusted. When the value is fixed and the lighting conditions of the LED lamp bead itself are fixed, in order to achieve the consistency of brightness, usually a lower pulse width PMW value will be accommodated, which will lose a certain amount of adjustment space for brightness and chromaticity

In addition, because in the prior art, the driver IC has no data storage function, if the receiving card is damaged, it is necessary to use the software program control again, replace the receiving card, and send a new program

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