Display layer having monolithic structure and display device including the display layer

Patent metadata

Field	Value
Publication number	US-12527141-B2
Application number	US-202117545645-A
Country	US
Kind code	B2
Filing date	Dec 8, 2021
Priority date	Jul 2, 2021
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A display device includes a display layer including a plurality of light-emitting devices and a plurality of switching devices in a one-to-one correspondence with the light-emitting devices, the plurality of light-emitting devices and the plurality of switching devices forming a monolithic structure, and a driving layer, wherein the plurality of light-emitting devices and the plurality of switching devices corresponding to the plurality of light-emitting devices are grouped into pixels and then arranged in the display layer, and the driving layer includes a plurality of driving devices configured to apply at least one driving signal to the display layer.

First claim

What is claimed is:

1 . A display device comprising:
a display layer comprising a plurality of light-emitting devices and a plurality of switching devices in a one-to-one correspondence with the plurality of light-emitting devices, wherein the plurality of light-emitting devices and the plurality of switching devices form a monolithic structure; and a driving layer comprising a plurality of driving devices configured to apply at least one driving signal to the display layer, wherein the display layer comprises a plurality of pixels each comprising at least one light-emitting device of the plurality of light-emitting devices and at least one switching device of the plurality of switching devices.

2 . The display device of claim 1 , wherein each of the plurality of driving devices corresponds to at least one of the plurality of pixels, and
wherein each of the plurality of driving devices is configured to apply a driving signal to the corresponding at least one of the plurality of pixels.

3 . The display device of claim 1 , wherein each of the plurality of driving devices corresponds to at least one of the plurality of pixels, and
wherein each of the plurality of driving devices is electrically connected to the corresponding at least one of the plurality of pixels by a respective pair of bonding pads from among a plurality of pairs of bonding pads between the driving layer and the display layer.

4 . The display device of claim 3 , wherein a gap between adjacent pairs of bonding pads of the plurality of pairs of bonding pads is greater than or substantially equal to a gap between adjacent pixels of the plurality of pixels.

5 . The display device of claim 3 , wherein a gap between adjacent pairs of bonding pads of the plurality of pairs of bonding pads is greater than a gap between adjacent light-emitting device of the plurality of light-emitting devices.

6 . The display device of claim 1 , wherein the plurality of pixels comprises a first pixel and a second pixel, and
wherein a first driving device among the plurality of driving devices is configured to apply a first driving signal to each of the first pixel and the second pixel.

7 . The display device of claim 1 , wherein the plurality of pixels comprises a first pixel comprising a plurality of first light-emitting devices among the plurality of light-emitting devices and a plurality of first switching devices among the plurality of switching devices, the plurality of first switching devices respectively corresponding to the plurality of first light-emitting devices,
wherein a first driving device among the plurality of driving devices is configured to apply a first driving signal among the at least one driving signal to the first pixel, and wherein each of the plurality of first light-emitting devices in the first pixel is configured to receive a different portion of the first driving signal via the corresponding first switching device.

8 . The display device of claim 7 , wherein the different portions of the first driving signal are obtained by a time-series division of the first driving signal, and
wherein the time-series division is performed by sequential switching operations via the plurality of switching devices.

9 . The display device of claim 1 , wherein the display layer comprises:
a light-emitting layer comprising the plurality of light-emitting devices; and a switching layer between the light-emitting layer and the driving layer and comprising the plurality of switching devices, and wherein the light-emitting layer and the switching layer do not have a bonding layer therebetween.

10 . The display device of claim 1 , wherein the driving layer further comprises a plurality of switch control blocks configured to control the plurality of switching devices to allocate different portions of the at least one driving signal to the plurality of light-emitting devices.

11 . The display device of claim 10 , wherein the driving layer further comprises a data control block comprising a plurality of column lines and a scan control block comprising a plurality of row lines,
wherein a driving device among the plurality of driving devices corresponds to a pixel among the plurality of pixels and is connected to a column line among the plurality of column lines and a row line among the plurality of row lines, wherein the row line corresponds to a switch control block among the plurality of switch control blocks and to a row of pixels from among the plurality of pixels, wherein some of the plurality of light-emitting devices are connected to the row line, and wherein the plurality of switching devices corresponding to the some of the plurality of light-emitting devices are controlled by the switch control block.

12 . The display device of claim 11 , wherein the switch control block comprises a plurality of connection lines,
wherein a number of bonding pads connecting the switch control block to the display layer is equal to a number of the plurality of light-emitting devices included in the pixel, and wherein the plurality of connection lines extend along the row of pixels connected to the row line and the plurality of connection lines are connected to switching devices from among the plurality of switching devices corresponding to the some of the plurality of light-emitting devices included in the row of pixels connected to the row line.

13 . The display device of claim 12 , wherein the row of pixels connected to the row line comprises a first pixel and a second pixel, and
wherein a connection line of the plurality of connection lines is connected to both of a first switching device corresponding to a first light-emitting device included in the first pixel and a second switching device corresponding to a second light-emitting device included in the second pixel.

14 . The display device of claim 1 , wherein at least one of the plurality of light-emitting devices has a size of about 0.1 μm to about 200 μm.

15 . A display layer comprising:
a light-emitting layer comprising a plurality of light-emitting devices; a switching layer comprising a plurality of switching devices, the plurality of switching devices corresponding to the plurality of light-emitting devices in a one-to-one manner; a plurality of pixels, each comprising at least one light-emitting device of the plurality of light-emitting devices and at least one switching device of the plurality of switching devices; and a plurality of bonding pads, wherein each of the plurality of bonding pads corresponds to a pixel of the plurality of pixels, wherein the plurality of bonding pads are arranged on a surface of the display layer, wherein the light-emitting layer is on a first side of the switching layer and the plurality of bonding pads are on a second side of the switching layer, the second side being opposite to the first side, and wherein the plurality of light-emitting devices and the plurality of switching devices form a monolithic structure.

16 . The display layer of claim 15 ,
wherein the light-emitting layer and the switching layer have no bonding layer therebetween.

17 . The display layer of claim 15 , wherein a gap between adjacent bonding pads of the plurality of bonding pads is greater than or substantially equal to a gap between adjacent pixels of the plurality of pixels.

18 . The display layer of claim 15 , wherein a gap between adjacent bonding pads of the plurality of bonding pads is greater than or substantially equal to a gap between adjacent light-emitting devices of the p

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kong Kiho
• Park Junghun
• Lee Eunsung
• Choi Junhee

Classifications

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G3/001

  using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP) · CPC title

• G09G2380/10

  Automotive applications · CPC title

• G09G2300/0804

  Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements · CPC title