Display control device of display screen, control method thereof and terminal equipment

Abstract

The invention discloses a display control device of a display screen, a control method thereof and terminal equipment. Time division multiplexing of a touch control TP line and a common voltage Vcom line of the display screen are realized. The display control device comprises the components of a controllable switch unit which is used for controlling whether the Vcom line is grounded; and a displaycontrol chip which is used for controlling the controllable switch unit in an interval after TP line scanning and before Vcom line scanning so that each Vcom line of the display screen is grounded and performing discharging processing on each Vcom line. Therefore residual charges after TP line scanning can be quickly eliminated, thereby effectively setting problems of screen flash and Flicker drift, supplying reliable insurance for displaying a picture on the display screen, and greatly improving user experience.

Description

technical field [0001] The present application relates to the field of electronic technology, and in particular to a display control device, a control method, and a terminal device of a display screen. Background technique [0002] In order to realize the thinning and lightening of the control panel of the terminal equipment, an In-cell display screen has appeared in the electronic industry at present. Among them, In-cell refers to the method of embedding the touch panel function into the liquid crystal panel, that is, adding a touch integrated circuit (Integrated Circuit, referred to as FPC) on the main flexible circuit board (Flexible Printed Circuit board, referred to as FPC) of the In-cell display screen. IC) and key connectors, so that the original external touch panel components can be integrated with the LCD panel. [0003] At present, the structure of the In-cell display screen is usually a Full-Incell structure, which is time-division multiplexed through a shared l...

AI Technical Summary

Problems solved by technology

[0004] However, the inventors have found that when the terminal device is in the black screen gesture function mode, the above-mentioned common line is used as a scanning line (TP line) and connected to the scanning driving power supply to realize the scanning operation, which causes residual charges to exist in the common line

When the display is turned on, if the common line is connected to the display reference power supply at this time, the charge on the common line (Vcom) will not be eliminated, which will easily cause the LCD panel to be polarized, and problems such as screen flicker and Flicker drift will occur. Thus affecting the normal use of the user and reducing the user's favorability

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