Chip on flex
The embodiments of the present disclosure provide a chip on flex (COF), a touch assembly, and a display device. The chip on flex includes a flexible base provided with a first opening, the flexible base includes a bonding area provided with a plurality of metal bonding pads; on the flexible base, a spacing area with a preset range is provided between the first opening and the bonding area; wherein, the flexible base is provided with a reinforcement sheet thereon, the reinforcement sheet is located on a portion of the flexible base other than the first opening, the spacing area and the bonding area.
1 . A chip on flex, comprising a flexible base provided with a first opening, the flexible base comprising a bonding area provided with a plurality of metal bonding pads; on the flexible base, a spacing area with a preset range being provided between the first opening and the bonding area; wherein, the flexible base is provided with a reinforcement sheet thereon, the reinforcement sheet is located on a portion of the flexible base other than the first opening, the spacing area and the bonding area, wherein the reinforcement sheet is made of steel;
wherein along a first direction, the width of the chip on flex at the bonding area is larger than the width of the chip on flex at a location corresponding to the first opening;
wherein the reinforcement sheet is provided with a second opening, and an orthographic projection of the first opening on a plane where the reinforcement sheet is located is inside the second opening or coincides with edges of the first opening.
2 . The chip on flex according to claim 1 , wherein the reinforcement sheet is provided on a surface of the flexible base opposite to the display flexible circuit board.
3 . The chip on flex according to claim 1 , wherein the reinforcement sheet is provided at least along one edge of the first opening.
4 . The chip on flex according to claim 1 , wherein the plurality of metal bonding pads in the bonding area are arranged along the first direction, the first opening is provided on a side away from the bonding area along a second direction, the second direction is vertical to the first direction;
between the first opening and the bonding area, a size range of the preset range in the first direction is equal to a size range of the flexible base in the first direction, and a size range of the preset range in the second direction is a preset width range from the bonding area.
5 . The chip on flex according to claim 4 , wherein, in the second direction, a distance between the first opening and the bonding area is larger than a width value of the preset width range.
6 . The chip on flex according to claim 1 , wherein the metal bonding pads and the reinforcement sheet are located on a same surface of the flexible base.
7 . The chip on flex according to claim 1 , wherein the chip on flex further comprises a control chip which is located on a portion of the flexible base other than the first opening, the spacing area, the bonding area and the reinforcement sheet.
8 . The chip on flex according to claim 1 , wherein the reinforcement sheet is adhered and fixed to the flexible base.
9 . A chip on flex, comprising a flexible base provided with a first opening, the flexible base comprising a bonding area provided with a plurality of metal bonding pads; on the flexible base, a spacing area with a preset range being provided between the first opening and the bonding area; wherein, the flexible base is provided with a reinforcement sheet thereon, the reinforcement sheet is located on a portion of the flexible base other than the first opening, the spacing area and the bonding area, wherein the reinforcement sheet is made of steel;
wherein along a first direction, the width of the chip on flex at the bonding area is larger than the width of the chip on flex at a location corresponding to the first opening;
wherein a bending area portion is formed between the first opening and the bonding area; and on a portion of the flexible base extending from the bonding area towards a second direction, a size range of the spacing area on the flexible base is larger than or equal to a size range of the bending area portion.
10 . The chip on flex according to claim 9 , wherein the reinforcement sheet is provided on a surface of the flexible base opposite to the display flexible circuit board.
11 . The chip on flex according to claim 9 , wherein the reinforcement sheet is provided at least along one edge of the first opening.
12 . The chip on flex according to claim 9 , wherein the reinforcement sheet is provided with a second opening, and an orthographic projection of the first opening on a plane where the reinforcement sheet is located is inside the second opening or coincides with edges of the first opening.
13 . The chip on flex according to claim 9 , wherein the plurality of metal bonding pads in the bonding area are arranged along the first direction, the first opening is provided on a side away from the bonding area along the second direction, the second direction is vertical to the first direction;
between the first opening and the bonding area, a size range of the preset range in the first direction is equal to a size range of the flexible base in the first direction, and a size range of the preset range in the second direction is a preset width range from the bonding area.
14 . The chip on flex according to claim 13 , wherein, in the second direction, a distance between the first opening and the bonding area is larger than a width value of the preset width range.
15 . The chip on flex according to claim 9 , wherein the metal bonding pads and the reinforcement sheet are located on a same surface of the flexible base.
16 . The chip on flex according to claim 9 , wherein the chip on flex further comprises a control chip which is located on a portion of the flexible base other than the first opening, the spacing area, the bonding area and the reinforcement sheet.
17 . The chip on flex according to claim 9 , wherein the reinforcement sheet is adhered and fixed to the flexible base.