CROSS-REFERENCE TO RELATED APPLICATION

This application is a national stage application under 35 U.S.C. § 371 of International Application No. PCT/CN2018/115028, filed Nov. 12, 2018, the contents of which are incorporated by reference in the entirety.

TECHNICAL FIELD

The preset disclosure relates to display technology, more particularly, to a touch substrate, a touch control display apparatus, and a method of fabricating a touch substrate.

BACKGROUND

In recent years, touch devices have been widely used many electronic devices such as mobile phones, computer display panels, touch screens, satellite navigation devices, digital cameras, etc. Examples of touch devices include a mutual-capacitance touch control device and a self-capacitance touch control device. In a mutual-capacitance touch control device, the touch electrodes include multiple touch scanning electrodes (Tx) and multiple touch sensing electrodes (Rx). In a self-capacitance touch control device, de touch electrode can achieve touch control function alone. When a finger touches a point on the touch control display panel, the capacitor of the finger superimposes on the touch panel capacitor, resulting in a change in the capacitance of the touch panel capacitor. Based on the capacitance change upon a touch event, the coordinates of the touch scanning electrode and the touch sensing electrode being touched may be determined. In detecting touch events, the mutual capacitive touch display panel examine the touch scanning electrode array and the touch sensing electrode array sequentially. Touch resolution correlates with the distance between adjacent conductive channels. A smaller distance between adjacent conductive channels results in a higher touch resolution.

SUMMARY

In one aspect, the present invention provides a touch substrate, comprising a first touch electrode layer comprising a plurality of first touch electrodes successively along a first direction, each of the plurality of first touch electrodes extending substantially along a second direction; and a second touch electrode layer comprising a plurality of second touch electrodes successively along the second direction, each of the plurality of second touch electrodes extending substantially along the first direction; wherein each of the plurality of first touch electrodes comprises a plurality of first touch electrode blocks electrically connected substantially along the second direction; and each of the plurality of second touch electrodes comprises a plurality of second touch electrode blocks electrically connected substantially along the first direction wherein the touch substrate further comprising a plurality of first connecting structures, each individual one of which being between two adjacent first touch electrode blocks of a respective one of the plurality of first touch electrodes; the two adjacent first touch electrode blocks along the second direction of the respective one of the plurality of first touch electrodes are electrically connected to each other though one of the plurality of first connecting structures; and each of the plurality of first connecting structures comprises a first conductive connecting ring.

Optionally, at least one of the plurality of first connecting structures further comprises a first conductive connecting island surrounded by the first conductive connecting ring.

Optionally, the at least one of the plurality of first connecting structures further comprises one or more first island bridges connecting the first conductive connecting island to the first conductive connecting ng.

Optionally, each of the one or more first island bridges extends along a direction that is non-parallel to the first direction and non-parallel to the second direction.

Optionally, the plurality of first touch electrodes and the plurality of second touch electrodes cross over each other thereby forming a plurality of intersections; each of the plurality of first connecting structures is between a first intersection and a second intersection of the plurality of intersections; and the first intersection and the second intersection are along the second direction and adjacent to each other.

Optionally, the touch substrate further comprises a first bridge and a second bridge insulated from each other and at the first intersection of the plurality of intersections; and a third bridge and a fourth bridge insulated from each other and at the second intersection of the plurality of intersections; wherein the second bridge connects two adjacent second touch electrode blocks of a first one of the plurality of second touch electrodes at the first intersection and along the first direction; the fourth bridge connects two adjacent second touch electrode blocks of a second one of the plurality of second touch electrodes at the second intersection and along the first direction; and each of the plurality of first connecting structures is connected to two adjacent first touch electrode blocks of a respective one of the plurality of first touch electrodes along the second direction, respectively through the first bridge at the first intersection and the third bridge at the second intersection.

Optionally, the two adjacent first touch electrode blocks of the respective one of the plurality of first touch electrodes, the first bridge at the first intersection, and the third bridge at the second intersection, constitute an integral structure, are in a same layer, and comprise a same material.

Optionally, the plurality of first touch electrodes, the plurality of second touch electrodes, the plurality of first connecting structures, the first bridge, and the third bridge we in a same layer, and comprise a same material; the touch substrate further comprises an insulating layer insulating the first bridge from the second bridge and insulating the third bridge from the fourth bridge; and the second bridge and the fourth bridge are on a side of the insulating layer distal to the same layer comprising the plurality of first touch electrodes, the plurality of second touch electrodes, the plurality of first connecting structures, the first bridge, and the third bridge.

Optionally, at least one of the plurality of first connecting structures further comprises a first conductive connecting island surrounded by the first conductive connecting ring, and one or more first island bridges connecting the first conductive connecting island to the first conductive connecting ring; the one or more first island bridges are on a side of the insulating layer distal to the first conductive connecting ring and the first conductive connecting island; and the insulating layer space apart the first conductive connecting ring from the first conductive connecting island.

Optionally the touch substrate further comprises a plurality of dummy patterns; wherein two adjacent first connecting structures of the plurality of first connecting structures along the first direction are spaced apart by one of the plurality of dummy patterns, which also spaces apart two adjacent second touch electrode blocks respectively from two adjacent second touch electrodes of the plurality of second touch electrodes.

Optionally, the plurality of first touch electrodes, the plurality of second touch electrodes, the plurality of first connecting structures, the first bridge, the second bridge, the third bridge, and the fourth bridge are made of a same metal oxide material.

Optionally, multiple ones of the plurality of first touch electrode blocks of a respective one of the plurality of first touch electrodes and multiple ones of the plurality of first connecting structures are alternately arranged along the second direction, thereby faming a conductive channel of the respective ace of the plurality of the first touch electrodes.

Optionally, the touch substrate further comprises a plurality of second connecting structures each individual one of which being between two adjacent second touch electrode blocks of a respective one of the plurality of second touch electrodes; wherein the two adjacent second touch electrode blocks along the second direction of the respective one of the plurality of second touch electrodes are electrically connected to each other through one of the plurality of second connecting structures; and each of the plurality of second connecting structures comprises a second conductive connecting ring.

Optionally, at least one of the plurality of second connecting structures further comprises a second conductive connecting island surrounded by the second conductive connecting ring.

Optionally, the at least one of the plurality of second connecting structures further comprises one or more second island bridges connecting the second conductive connecting island to the second conductive connecting ring.

Optionally, the touch substrate further comprises a plurality of first touch signal lines and a plurality of second touch signal lines; wherein each of the plurality of first touch signal lines is electrically connected to two or more of the plurality of first touch electrodes, which are electrically connected in parallel; and each of the plurality of second touch signal lines is electrically connected to two or more of the plurality of second touch electrodes, which are electrically connected in parallel.

In another aspect, the present invention provides a touch control display apparatus comprising the touch substrate described herein or fabricated by a method described herein.

Optionally, the touch control display apparatus is a flexible touch control display apparatus.

Optionally, the touch control display apparatus has a plurality of subpixels; and each of the plurality of subpixels comprises four of the plurality of first connecting structures.

In another aspect, the present invention provides a method of fabricating a touch substrate, comprising forming a first touch electrode layer comprising a plurality of first touch electrodes successively along a first direction, each of the plurality of first touch electrodes extending substantially along a second direction; and forming a second touch electrode layer comprising a plurality of second touch electrodes successively along the second direction, each of the plurality of second touch electrodes tending substantially along the first direction; wherein forming each of the plurality of first touch electrodes comprises forming a plurality of first touch electrode blocks electrically connected substantially along the second direction; and forming each of the plurality of second touch electrodes comprises forming a plurality of second touch electrode blocks electrically connected substantially along the first direction; wherein the method further comprising forming a plurality of first connecting structures, each individual one of which being formed between two adjacent first touch electrode blocks of a respective one of the plurality of first touch electrodes; the two adjacent first touch electrode blocks along the second direction of the respective one of the plurality of first touch electrodes are formed to be electrically connected to each other through one of the plurality of first connecting structures; and forming each of the plurality of first connecting structures comprises forming a first conductive connecting ring.

