Touch display screen, method for manufacturing display electrode of the touch display screen, display electrode and electronic device

An electronic device, comprising a touch display screen, the touch display screen comprising:

• a cover plate, a color filter, a liquid crystal layer, a display electrode, a substrate and a backlight unit which are stacked sequentially from top to bottom, wherein:
• the touch display screen further comprises a touch detecting unit and a display control unit;
• the display electrode comprises an electrode in a first direction and an electrode in a second direction which intersects with the first direction;
• the electrode in the first direction and the electrode in the second direction are connected to the touch detecting unit, the touch detecting unit is adapted to detect mutual capacitance formed between the electrode in the first direction and the electrode in the second direction, and determine a touch on the touch display screen based on the detected mutual capacitance;
• the display electrode is further connected to the display control unit, the display control unit is adapted to control the display electrode to perform liquid crystal display;
• and
• the display control unit and the touch detecting unit operate in a time-sharing manner.

A method for manufacturing a display electrode, comprising:

• vacuum sputtering a layer of metal on a substrate of a touch display screen, patterning the layer of metal by lithography to form a switch electrode, and forming a first insulating layer on the switch electrode;
• vacuum sputtering a layer of electrode material, and patterning the layer of electrode material by lithography to form a common electrode in an X-axis direction;
• forming a Thin Film Transistor TFT by lithography, forming a second insulating layer on the TFT and the common electrode in the X-axis direction, and patterning the second insulating layer by lithography;
• vacuum sputtering a layer of metal, and patterning the layer of metal by lithography to form a signal electrode and a drain in a way that the signal electrode and the drain are connected to two terminals of the TFT respectively via the patterned second insulating layer;
• forming a third insulating layer on the signal electrode and the drain, and patterning the third insulating layer by lithography;
• and
• vacuum sputtering a layer of electrode material, and patterning the layer of electrode material by lithography to form a common electrode in a Y-axis direction and a pixel electrode in a way that the pixel electrode is connected to the drain via the patterned third insulating layer.

A display electrode of a touch display screen, comprising a switch electrode, a pixel electrode, a Thin Film Transistor TFT, a signal electrode, a common electrode in an X-axis direction and a common electrode in a Y-axis direction, wherein:

• a first insulating layer is stacked above the switch electrode, the TFT and the common electrode in the X-axis direction are stacked on the first insulating layer;
• a second insulating layer is stacked above the TFT and the common electrode in the X-axis direction, the signal electrode and a drain are stacked on the second insulating layer, and the signal electrode and the drain are respectively connected to two terminals of the TFT by passing through the second insulating layer;
• and
• a third insulating layer is stacked above the signal electrode and the drain, the pixel electrode is stacked on the third insulating layer, and the pixel electrode is connected to the drain by passing through the third insulating layer.

A touch display screen, comprising:

• a touch detecting unit;
• a display control unit;
• and
• a display electrode comprising an electrode in a first direction and an electrode in a second direction which intersects with the first direction;
• and
• wherein the electrode in the first direction and the electrode in the second direction are connected to the touch detecting unit,
• the touch detecting unit is adapted to detect mutual capacitance formed between the electrode in the first direction and the electrode in the second direction, and determine a touch on the touch display screen based on the detected mutual capacitance;
• and
• the electrode in the first direction and the electrode in the second direction are further connected to the display control unit, the display control unit is adapted to control the display electrode to perform image display;
• and
• the display control unit and the touch detecting unit operate in a time-sharing manner.