Display device

Patent metadata

Field	Value
Publication number	US-12474795-B2
Application number	US-202418607644-A
Country	US
Kind code	B2
Filing date	Mar 18, 2024
Priority date	Mar 30, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

According to one embodiment, a display device includes a base, a display unit containing pixels, a power supply circuit, a touch controller and a switching circuit disposed between the display unit, the power supply circuit and the touch controller. The pixels each includes a pixel circuit and a display element including a lower electrode connected to the pixel circuit, an upper electrode disposed to oppose the lower electrode and an organic layer including a light-emitting layer disposed between the lower electrode and the upper electrode. The upper electrode is connected to the switching circuit, and the switching circuit selectively switches between connecting the upper electrode to the power supply circuit and connecting the upper electrode to the touch controller.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; and a display including a plurality of pixels arranged in a matrix along a first direction and a second direction intersecting the first direction on the substrate; the plurality of pixels each comprising:
a display element including an anode, a cathode disposed to oppose the anode, and an organic layer including a light-emitting layer disposed between the anode and the cathode, and
the cathode including a first electrode provided for a first predetermined number of pixels and a second electrode provided for a second predetermined number of pixels;
wherein the first electrode is formed into a rectangular shape, the second electrode is formed into an L-shape including a main body portion adjacent to the first electrode along the first direction and a drawer portion extending from the main body portion toward an edge of the display unit, and the second electrode is placed between two organic layers adjacent to each other and to partition each pixel.

2 . The display device of claim 1 , wherein
a first edge of the main body portion of the second electrode extending along the second direction is longer than a second edge of the first electrode extending along the second direction.

3 . The display device according to claim 2 , wherein
a difference between the first edge of the main body portion of the second electrode and the first edge of the first electrode is equivalent to a width of the drawer portion of the second electrode along the second direction.

4 . The display device according to claim 1 , further comprising:
a power supply circuit that supplies a potential to the display for displaying an image; a touch controller that detects a touch with respect to the display; a switching circuit coupled with the first electrode and the second electrode to the power supply circuit and the touch controller; and a pixel circuit disposed on the substrate, wherein the anode is connected to the pixel circuit, and the first electrode and the second electrode are connected to the switching circuit.

5 . The display device of claim 4 , wherein
in a first period of displaying an image on the display, the switching circuit connects the first electrode and the second electrode to the power supply circuit and disconnects each of the first electrode and the second electrode from the touch controller, and in a second period of detecting a touch with respect to the display, the switching circuit connects the first electrode and the second electrode to the touch controller and disconnects the first electrode and the second electrode from the power supply circuit.

6 . The display device of claim 5 , wherein
the power supply circuit supplies a common potential to the first electrode and the second electrode in the first period, and the touch controller supplies a drive signal for touch detection to the first electrode and the second electrode in the second period, and detects a touch based on the detection signal output from the first electrode and the second electrode according to the drive signal.

Assignees

• Magnolia White Corp

Inventors

• Tabatake Hiroshi
• Takahashi Hideyuki

Classifications

• H10K59/80521

  characterised by their shape · CPC title

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · CPC title

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• G06F3/04166

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title