Display device

Patent metadata

Field	Value
Publication number	US-11086153-B2
Application number	US-202016879257-A
Country	US
Kind code	B2
Filing date	May 20, 2020
Priority date	Mar 7, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

In one embodiment, a display device includes a display area, a peripheral area, scanning lines, signal lines, a first driver in the peripheral area, and a second driver in the peripheral area. The display area has an arc-shaped corner. The first driver includes first and second buffers configured to apply voltage to the scanning lines, a first shift register unit configured to control the first buffer unit, and a second shift register unit configured to control the second buffer unit. At the corner, extension directions of the first buffer unit and the first shift register unit are equal to each other. Extension directions of the second buffer unit and the second shift register unit are different from each other.

First claim

What is claimed is:

1. A display device comprising:
a plurality of pixels in a display area;
a plurality of signal lines arrayed in a first direction in the display area;
a plurality of scanning lines arrayed in a second direction crossing the first direction in the display area; and
a scanning line driver in a peripheral area outside of the display area;
wherein
the display area includes a corner portion,
pixels in the corner portion are arranged in a stepped pattern,
the scanning line driver includes a first shift register unit, a first buffer unit connected to the first shift register unit, a second shift register unit that is previous or subsequent to the first shift register unit, and a second buffer unit connected to the second shift register unit,
the first shift register unit and the second shift register unit are arranged along the stepped pattern of the pixels,
the first buffer unit and the second buffer unit are arranged along the stepped pattern of the pixels,
four scanning lines of the plurality of scanning lines are connected to the first buffer unit,
other four scanning lines of the plurality of scanning lines are connected to the second buffer unit,
the first buffer unit includes four buffer circuits arrayed along the first direction, and
the second buffer unit includes four buffer circuits arrayed along the second direction.

2. The display device of claim 1 , wherein
the first buffer unit has a first extension direction parallel to the first direction and a second extension direction parallel to the second direction,
the second buffer unit has a first extension direction parallel to the first direction and a second extension direction parallel to the second direction,
the first extension direction of the first buffer unit is longer than the first extension direction of the second buffer unit, and
the second extension direction of the first buffer unit is shorter than the second extension direction of the second buffer unit.

3. The display device of claim 2 , wherein
the first shift register unit has a first extension direction parallel to the first direction and a second extension direction parallel to the second direction,
the second shift register unit has a first extension direction parallel to the first direction and a second extension direction parallel to the second direction,
the first extension direction of the first shift register unit is shorter than the first extension direction of the second shift register unit, and
the second extension direction of the first shift register unit is longer than the second extension direction of the second shift register unit.

4. The display device of claim 3 , wherein
a distance between the first buffer unit and the second shift register unit is shorter than a distance between the second buffer unit and the second shift register unit.

5. The display device of claim 3 , further comprising a signal line driver in the peripheral area and a video line group in the peripheral area, wherein
the video line group is connected to the signal line driver,
the plurality of signal lines is connected to the signal line driver,
the signal line driver is between the video line group and the plurality of signal lines, and
the video line group along the corner portion has a stepped area.

6. The display device of claim 5 , wherein
the first buffer unit is located between the first shift register unit and the video line group, and
the second buffer unit is located between the video line group and the display area.

7. The display device of claim 6 , wherein
the second buffer unit is connected to the second shift register unit by a connection line, and
the connection line crosses the video line group.

8. The display device of claim 7 , wherein
the first buffer unit is connected to the first shift register unit by a connection line, and
the connection line between the first buffer unit and the first shift register unit does not overlap the video line group.

Assignees

• Japan Display Inc

Inventors

• Koide Gen
• Noshita Shimpei
• Kitamura Junichi

Classifications

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title