A non-linear gamma curve generation system and method for improving oled display effect

Abstract

The invention discloses a non-linear Gamma curve generation system for improving the display effect of OLEDs, which includes a DAC, the input end of the DAC is used to receive video data, the output end of the DAC is connected to a display drive circuit, the display drive circuit is connected to a pixel circuit, and the pixel circuit is connected to an OLED. The present invention also discloses a non-linear Gamma curve generation method for improving the OLED display effect. The invention divides the input data into a selection signal and a transmission signal skillfully. After the selection signal is coded by a thermometer code, its unique coding form just acts on The data selector finally makes the current steering DAC in the whole range, and its output voltage change approximately presents Gamma characteristics. The whole system uses a simple structure, easy-to-implement combination logic circuit and a low-level current steering DAC to realize a high-level nonlinear DAC. The non-linear DAC structure has strong scalability and can realize higher-precision non-linear voltage conversion, which is suitable for the demand and development of the display effect of the OLED display system in the future.

Description

technical field [0001] The invention belongs to the technical field of nonlinear digital-to-analog converters, and in particular relates to a nonlinear Gamma curve generation system for improving the display effect of OLEDs. [0002] The invention also relates to a non-linear Gamma curve generation method for improving the OLED display effect. Background technique [0003] Human beings obtain information from the outside world through sensory organs. Research at the beginning of the 20th century showed that about 60% of the external information that the human brain perceives through organs every day comes from the visual organs. However, in recent years, the research data has changed. 83% of external information, the development of the electronic display industry has promoted the transmission of more information by the visual organs, the change in the way humans obtain information, and also promoted the continuous development of the electronic display industry in a directio...

AI Technical Summary

Problems solved by technology

In order to make the display characteristics of the display show a Gamma curve characteristic, the commonly used solutions are: 1. The combination of digital logic algorithm and linear DAC produces a nonlinear Gamma curve. This solution requires a DAC with a higher number of digits and a better algorithm, and the design is more complicated.

2. Use nonlinear DAC to directly generate nonlinear Gamma curve. The existing method is to use the structure of resistive DAC to realize nonlinear DAC. The slope can realize the generation of the Gamma curve, but as the gray scale increases, the number of resistors increases and the area becomes larger, so it is difficult to apply to a higher-precision display system

Images