Display device having the bumps in the middle zone parallel to the reference line
A display device and chip bonding method thereof are provided. The display device includes a flexible display panel and a chip bonded to the non-display area of the flexible display panel with the extension directions of individual bumps satisfying, depending on the area in which the bumps are located, the following requirements: in each row of bumps, at least the individual bumps in lateral zones have their extension lines on the same side converging at a same point on the reference line, and the two bumps belong to a same bump group have their extension lines respectively forming an angle with respect to the reference line, the angles being equal to each other.
1. A display device, comprising a flexible display panel and a chip bonded to a non-display area of the flexible display panel, wherein the chip has two rows of multiple mutually independent bumps, with one row on a side near a display area of the flexible display panel and the other row on a side away from the display area; the flexible display panel has bumps in one-to-one correspondence with those bumps of the chip; every two bumps in one-to-one correspondence are electrically connected through press bonding; depending on an area including a middle zone and two lateral zones on two sides of the middle zone distributed symmetrically with respect to a reference line, in which the bumps are located, respectively, the bumps satisfy the requirements that:
in each row of bumps, all of the bumps in each zone have their extension lines converging at a same point on an extension line of the reference line, and have a similar shape in each same zone, respectively, and all of the bumps in the middle zone are substantially parallel to the reference line;
wherein the reference line is a straight line located in the middle zone and perpendicular to a first direction, the first direction being an arrangement direction of a row of the bumps.
2. The display device according to claim 1 , wherein the reference line is the central axis of the middle zone.
3. The display device according to claim 2 , wherein in all of the lateral zones, the bumps with the same distance from the reference line have their extension lines forming a same angle with respect to the reference line.
4. The display device according to claim 1 , wherein in each row of bumps, the bumps in the two lateral zones on two sides of the middle zone are distributed symmetrically with respect to the reference line that acts as a symmetric axis.
5. The display device according to claim 4 , wherein in all of the lateral zones, the bumps with the same distance from the reference line have their extension lines forming a same angle with respect to the reference line.
6. The display device according to claim 5 , wherein the two bumps belong to the same bump group are similar in shapes.
7. The display device according to claim 6 , wherein in the two bumps within the same bump group, the bump on the chip has an area smaller than that of the bump on the flexible display panel.
8. The display device according to claim 7 , wherein the bumps located in the middle zone are parallel to the reference line.
9. The display device according to claim 8 , further comprising alignment markings used for alignment, which are located in one row of bump groups and respectively located on the individual bumps in one of the bump groups in at least one of the lateral zones, wherein the alignment markings on the bumps within a same row have lines connected therebetween perpendicular to the reference line.
10. The display device according to claim 1 , wherein the two bumps belong to the same bump group are similar in shapes.
11. The display device according to claim 10 , wherein in the two bumps within the same bump group, the bump on the chip has an area smaller than that of the bump on the flexible display panel.
12. The display device according to claim 1 , wherein in each row of bumps, one bump group is disposed in the middle zone.
13. The display device according to claim 1 , further comprising alignment markings used for alignment, which are located in one row of bump groups and respectively located on the individual bumps in one of the bump groups in at least one of lateral zones, wherein the alignment markings on the bumps within a same row have lines connected therebetween perpendicular to the reference line.
14. The display device according to claim 13 , wherein when the bumps in the two lateral zones on two sides of the middle zone are distributed symmetrically with respect to the reference line that acts as the symmetric axis, the alignment markings on the bumps within the same row are distributed symmetrically with respect to the reference line that acts as the symmetric axis.