Display device including two kinds of pixel arrangements

Patent metadata

Field	Value
Publication number	US-11670644-B2
Application number	US-202117555370-A
Country	US
Kind code	B2
Filing date	Dec 17, 2021
Priority date	Feb 27, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A display device includes a first region and a second region each including a plurality of pixels, and a plurality of wires connected to the plurality of pixels, respectively, to transmit a signal, where the number of pixels per unit area in the second region is less than the number of pixels per unit area in the first region, and the number of wires per unit area in the second region is less than the number of wires per unit area in the first region.

First claim

What is claimed is:

1. A display device, comprising
a first region and a second region each including a plurality of pixels, and
an optical sensor disposed in the second region,
wherein each of the plurality of pixels includes:
a light emitting diode (LED) connected between a driving voltage line and a common voltage line;
a driving transistor connected between the driving voltage line and the light emitting diode (LED);
a second transistor connected between a first electrode of the driving transistor and a data line, the first electrode of the driving transistor being connected to the driving voltage line; and
a storage capacitor connected between the driving voltage line and a gate electrode of the driving transistor, and
wherein a ratio of a width to a length of a channel of the driving transistor for the second region is 155% or more and 206% or less of a ratio of a width to a length of a channel of the driving transistor for the first region.

2. The display device of claim 1 , wherein
the optical sensor includes at least one of a camera, a proximity sensor, an illuminance sensor, a gesture sensor, a motion sensor, a fingerprint sensor, and a biometric sensor, or a combination thereof.

3. The display device of claim 1 , wherein
the optical sensor is disposed under the pixels in the second region.

4. The display device of claim 1 , wherein
the second region is surrounded by the first region.

5. The display device of claim 1 , wherein
an area of the first region is relatively larger than an area of the second region.

6. The display device of claim 1 , further comprising:
a substrate disposed in the first region and the second region; and
a light blocking member disposed on the substrate,
wherein the light blocking member is disposed between the substrate and the gate electrode of the driving transistor for the second region.

7. The display device of claim 6 , wherein
the plurality of pixels includes a first pixel which represents a red color, a second pixel which represents a green color, and a third pixel which represents a blue color, and
a capacitance of the storage capacitor of the first pixel for the second region is 86% or more and 140% or less of a capacitance of the storage capacitor of the first pixel for the first region.

8. The display device of claim 7 , wherein
a capacitance of an auxiliary capacitor comprising the light blocking member and the gate electrode of the first pixel for the second region is 27% or more and 37% or less of the capacitance of the storage capacitor of the first pixel for the first region.

9. The display device of claim 6 , wherein
the plurality of pixels includes a first pixel which represents a red color, a second pixel which represents a green color, and a third pixel which represents a blue color, and a capacitance of the storage capacitor of the second pixel for the second region is 63% or more and 90% or less of a capacitance of the storage capacitor of the second pixel for the first region.

10. The display device of claim 9 , wherein
a capacitance of an auxiliary capacitor comprising the light blocking member and the gate electrode of the second pixel for the second region is 27% or more and 33% or less of a capacitance of the storage capacitor of the second pixel for the first region.

11. The display device of claim 6 , wherein
the plurality of pixels includes a first pixel which represents a red color, a second pixel which represents a green color, and a third pixel which represents a blue color, and a capacitance of the storage capacitor of the third pixel for the second region is 81% or more and 137% or less of a capacitance of the storage capacitor of the third pixel for the first region.

12. The display device of claim 11 , wherein
a capacitance of an auxiliary capacitor comprising the light blocking member and the gate electrode of the third pixel for the second region is 26% or more and 37% or less of a capacitance of the storage capacitor of the third pixel for the first region.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Dong-Hwi
• Jeon Jin

Classifications

• H10K59/353

  characterised by the geometrical arrangement of the RGB subpixels · CPC title

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• G09F9/372

  the positions of the elements being controlled by the application of an electric field · CPC title

• G09F9/335

  being organic light emitting diodes [OLED] · CPC title

• H10K59/1216

  the pixel elements being capacitors · CPC title