Display panel and display device

Patent metadata

Field	Value
Publication number	US-10468464-B2
Application number	US-201715717870-A
Country	US
Kind code	B2
Filing date	Sep 27, 2017
Priority date	May 27, 2017
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

Disclosed are a display panel and a display device, the display panel includes: an array substrate, which includes a base substrate and a display drive circuit on the base substrate; a display unit, which is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate; and a fingerprint identification unit, which includes a light-sensing unit, wherein the light-sensing unit is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate, and a vertical projection of the light-sensing unit on a plane including a light-emitting functional layer of the display unit is located between short edges of the light-emitting functional layers of adjacent display units.

First claim

What is claimed is:

1. A display panel, comprising:
an array substrate, which includes a base substrate and a display drive circuit formed on the base substrate;
a display unit, which is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate; and
a fingerprint identification unit, which includes a light-sensing unit, wherein the light-sensing unit is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate, and a vertical projection of the light-sensing unit on a plane including a light-emitting functional layer of the display unit is located between short edges of the light-emitting functional layers of adjacent display units,
wherein a plurality of the display units is arranged successively along a first direction, and short edges of light-emitting functional layers of adjacent two rows of the display units arranged along the first direction are provided opposite to each other; and
a vertical projection of the light-sensing unit on a plane including a light-emitting functional layer of the display unit is located between light-emitting functional layers of adjacent two rows of display units arranged along the first direction.

2. The display panel as claimed in claim 1 , wherein:
a shape of the light-emitting functional layer of the display unit is a rectangle.

3. The display panel as claimed in claim 1 , further comprising:
an encapsulation layer, which is provided on one side of the display unit that is facing away from the array substrate; and
a support column, which is provided between the encapsulation layer and the array substrate, wherein a vertical projection of the support column on the array substrate is free of overlapping with a vertical projection of the light-sensing unit on the array substrate, or, a vertical projection of the light-sensing unit on the array substrate covers a vertical projection of the support column on the array substrate.

4. The display panel as claimed in claim 1 , wherein:
the display unit comprises a light-emitting functional layer, a first electrode and a reflection electrode, the light-emitting functional layer is provided between the first electrode and the reflection electrode, and the first electrode is provided on one side of the light-emitting functional layer that is facing away from the array substrate; and
the light-sensing unit is provided between a film layer including the first electrode and the array substrate.

5. The display panel as claimed in claim 1 , wherein:
the display drive circuit comprises at least two first thin-film transistors and at least one capacitor.

6. The display panel as claimed in claim 5 , wherein:
the fingerprint identification unit further comprises a fingerprint identification circuit, which comprises a storage capacitor and a second thin-film transistor;
a top electrode of the light-sensing unit is electrically connected with a first electrode of the storage capacitor, a bottom electrode of the light-sensing unit is electrically connected with a second electrode of the storage capacitor and a source electrode of the second thin-film transistor; a gate electrode of the second thin-film transistor is electrically connected with a switch control line, and a drain electrode of the second thin-film transistor is electrically connected with a signal detection line.

7. The display panel as claimed in claim 6 , wherein:
the second thin-film transistor is provided on the same layer as each film layer of the at least two first thin-film transistors of the display drive circuit.

8. The display panel as claimed in claim 6 , wherein:
the storage capacitor is provided on the same layer as each film layer of the at least one capacitor of the display drive circuit.

9. The display panel as claimed in claim 6 , wherein:
the light-sensing unit comprises a PIN junction located between the top electrode and the bottom electrode, the bottom electrode is a light-tight metallic layer, and the bottom electrode is located on one side of the PIN junction that is adjacent to the array substrate.

10. The display panel as claimed in claim 9 , wherein:
the storage capacitor is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate, and a vertical projection of the storage capacitor on a plane including a light-emitting functional layer of the display unit is located between light-emitting functional layers of adjacent display units.

11. The display panel as claimed in claim 10 , wherein:
the bottom electrode of the light-sensing unit is multiplexed as the second electrode of the storage capacitor, and the first electrode of the storage capacitor is provided on one side of the light-sensing unit that is adjacent to the array substrate.

12. The display panel as claimed in claim 11 , wherein:
the first electrode of the storage capacitor is provided on the same layer as the reflection electrode of the display unit.

13. The display panel as claimed in claim 9 , wherein:
a vertical projection of the PIN junction on the array substrate has a rectangle, a circle or an ellipse shape.

14. A display device, comprising a display panel which comprising:
an array substrate, which includes a base substrate and a display drive circuit formed on the base substrate;
a display unit, which is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate; and
a fingerprint identification unit, which includes a light-sensing unit, wherein the light-sensing unit is provided on the array substrate and located on one side of the display drive circuit that is facing away from the base substrate, and a vertical projection of the light-sensing unit on a plane including a light-emitting functional layer of the display unit is located between short edges of the light-emitting functional layers of adjacent display units,
wherein a plurality of the display units is arranged successively along a first direction, and short edges of light-emitting functional layers of adjacent two rows of the display units arranged along the first direction are provided opposite to each other, and
a vertical projection of the light-sensing unit on a plane including a light-emitting functional layer of the display unit is located between light-emitting functional layers of adjacent two rows of display units arranged along the first direction.

Assignees

• Shanghai Tianma Micro Elect Co

Inventors

• Yang Kang
• Wang Lihua
• Yao Qijun
• Zeng Yang

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G09G3/3225

  using an active matrix · CPC title

• G06K9/0004

  Physics · mapped topic

• H01L27/323

  Electricity · mapped topic