Microled gray scale expansion method

Abstract

The invention discloses a Microled gray scale expansion method, which is characterized in that a mixed waveform composed of a sawtooth wave and a square wave is used as a driving signal of Microled gray scale expansion, the driving signal is a periodic signal, in each period, the front section of the driving signal is the sawtooth wave, the middle section of the driving signal is the square wave, the rear section of the driving signal is 0, and according to different gray scales of the Microled and different lightening time, when the gray scale Gray of the Microled is less than Gray 0, the sawtooth wave of the front section of the driving signal is used as the driving signal; and when the gray scale Gray of the Microled is greater than Gray 0 and less than Gray 1, the mixed waveform formed by the sawtooth wave and the square wave is taken as the driving signal, and when Gray is greater than Gray 1, the square wave is taken as the driving signal. According to the Microled gray scale expansion method, different driving signals and lightening time are adopted for the Microled at different gray scales, and the brightness of the Microled is adjusted through the combined action of two parameters, namely, the lightening time and the current amplitude, so that the brightness of the Microled at different gray scales is consistent with a gama 2.2 curve, and the display quality of the Microled can be remarkably improved. According to the invention, the lightening time of the Microled is not increased, the design area is not increased, and the technology is easy to realize.

Description

technical field [0001] The present invention relates to the technical field of Microled driving, in particular to a Microled gray scale unfolding method. Background technique [0002] Micro LED display technology refers to a display technology that uses self-luminous micron-scale LEDs as light-emitting pixel units and assembles them on the drive panel to form a high-density LED array. Due to the characteristics of small chip size, high integration and self-illumination, micro LED has greater advantages in terms of brightness, resolution, contrast, energy consumption, service life, response speed and thermal stability compared with LCD and OLED in terms of display. The advantages. [0003] At present, Micro LEDs can only be driven by digital signals, and the driving signals of Micro LEDs are usually square wave signals, and the brightness is realized by controlling the lighting time of the LEDs. For example, set the total time to the nth power of 2. In this case, the bright...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the Micro LED described in the background technology is driven by a square wave signal, and the lighting time is increased to achieve low-gray scale expansion, the occupied design area is increased, and the difficulty of process implementation is greatly increased, etc., to provide a solution. A kind of Microled grayscale unfolding method that can solve the foregoing problems

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