Low-voltage digital-to-analog signal converting circuit, data driving circuit and display system

Abstract

The invention discloses a low-voltage digital-to-analog signal converting circuit, a data driving circuit and a display system. The low-voltage digital-to-analog signal converting circuit comprises at least one voltage-dividing unit (10); the voltage-dividing unit (10) includes a plurality of resistors which are connected in series between low-limit voltage and high-limit voltage, and voltage-dividing output ends which are led out from series connection nodes of the resistors and high-limit voltage connection ends. According to the low-voltage digital and analog signal converting circuit, the data driving circuit and the display system of the invention, the voltage-dividing units (10) are adopted, so that the low-voltage digital-to-analog signal converting circuit, the data driving circuit and the display system can be low-voltage devices, and the power consumption of the low-voltage digital-to-analog signal converting circuit, the data driving circuit and the display system are low, and the low-voltage digital-to-analog signal converting circuit occupies a small area of a chip.

Description

technical field [0001] The present application relates to the technical field of display devices, in particular to a low-cost digital-to-analog converter, a data drive circuit and a display system for displaying. Background technique [0002] As a medium of information transmission, the display system is closely related to people's life. The current mainstream display system is liquid crystal display system (LCD), and active matrix organic light emitting diode display system (AMOLED) has also begun to emerge in the field of small size. Regardless of whether it is an LCD display system or an OLED display system, it is necessary to convert the digital signal representing the image information into an analog signal before displaying it on the panel. This requires the use of digital-to-analog converters (DACs). In the display system, the design of DAC is the core module in the column driver chip. In the display system, such as figure 1 As shown, the DAC generally uses the fo...

AI Technical Summary

Problems solved by technology

[0003] The analog signal used by display systems such as LCD and OLED to drive the display is a medium-high voltage signal, and the medium-high voltage analog signal must be selected from the voltage division of the resistor string in the above-mentioned DAC, which makes the resistor string applied with a medium-high voltage , which in turn makes the transfer transistor array PTL and other related devices in the DAC to be medium and high voltage devices, and medium and high voltage devices require greater power consumption and occupy a larger chip area

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