Source electrode driving circuit, source electrode driving chip and display device

Abstract

The invention discloses a source electrode driving circuit, a source electrode driving chip and a display device. The source electrode driving circuit comprises a first conversion module, a second conversion module, a comparison module, a switch control module and an output module, wherein the comparison module is used for comparing the data signals of the current frame and the previous frame and generating a corresponding pre-charging voltage signal; after a control signal rising edge arrives, the pre-charging voltage signal is converted into a corresponding analog signal and outputted by the second conversion module; after a control signal falling edge arrives, the analog signal corresponding to the data signal of the previous frame is converted and outputted by the first conversion module. Under the control of the control signal within a frame time period, the data signals are loaded to a data line in two time periods, so that the charging efficiency can be effectively increased. Compared with the prior art that the corresponding data signal is loaded to the data line only after the control signal falling edge arrives, the source electrode driving circuit is capable of effectively solving the problem of insufficient charging, so that the display quality of a display panel can be promoted.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a source driving circuit, a source driving chip and a display device. Background technique [0002] As the size of the panel increases and the resolution increases, the transmission distance of the data signal on the data line gradually increases, and the load value loaded by the corresponding data signal also gradually increases, resulting in the problem of insufficient charging time within one frame time, which affects the display. The display quality of the product. [0003] like figure 1 As shown, a common display device mainly includes: a display panel P for displaying images, a source driver chip S, a gate driver chip G, and a backlight source B for providing backlight; the driving method for realizing normal display is: The gate driver chip inputs scanning signals to each gate line of the display panel to realize progressive scanning, and the source driver chip loads th...

AI Technical Summary

Problems solved by technology

However, as the size of the display panel increases and the resolution increases, the load value of the display panel in the direction of loading the scan signal along the gate line and the direction of loading the data signal along the data line gradually increases, so that the charging time is obviously insufficient.

For example, when the resolution of the display panel is 8K (7680x4320) and the frame frequency is 60hz, the scanning signal loading time of one raster line (1h Time=16.7ms / 4320) is about 3.7us. Al, Cu) and the limitations of process design characteristics cannot satisfy the full charging of the data line within 3.7us, which will cause a low charging rate of the display panel and affect the display quality of the entire display screen

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