Organic electroluminescent display device

• US 10,020,353 B2
• Filed: 07/13/2017
• Issued: 07/10/2018
• Est. Priority Date: 12/18/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Furuie, Masamitsu
• Primary Examiner(s): Wilson, Allan R
• Application Number:
  US15/649,023
• Publication Number:
  US 20170309694A1
• Time in Patent Office: 362 Days
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/873 Encapsulations

Abstract

An organic electroluminescent display device includes a display area including a plurality of pixels, a peripheral area as an area on the outside of the display area, a circuit layer including a circuit formed in the display area and a circuit formed in the peripheral area, a planarization film formed in the display area, the planarization film covering the circuit in the display area but not covering at least a portion of the circuit in the peripheral area, and an inorganic insulating layer formed of an inorganic material, the inorganic insulating layer being formed in the peripheral area and covering the at least a portion of the circuit in the peripheral area.

Claims

1. An organic electroluminescent display device comprising:

a display area including a plurality of pixels;

a peripheral area outside of the display area;

a circuit layer including a circuit in the display area and another circuit in the peripheral area;

a planarization film in the display area, the planarization film covering the circuit in the display area but not covering at least a portion of the circuit in the peripheral area;

an inorganic insulating layer in the peripheral area, the inorganic insulating layer covering the at least a portion of the circuit in the peripheral area, the inorganic insulating layer surrounding an entire outer perimeter of the display area in a plan view; and

a common electrode over the plurality of pixels in the display area, the common electrode including a peripheral portion in the peripheral area, the common electrode being in a higher layer than the planarization film and the inorganic insulating layer, wherein

the circuit layer includes, in the peripheral area, a wire, a contact portion, and a circuit element different from the contact portion, the contact portion being connected to the peripheral portion of the common electrode and connecting the wire and the common electrode, and

the contact portion is disposed farther from the display area than the different circuit element is from the display area.

2. The organic electroluminescent display device according to claim 1, wherein

the circuit layer includes, as the different circuit element in the peripheral area, a plurality of circuit elements arranged from an edge of the display area in a direction away from the display area.

3. The organic electroluminescent display device according to claim 1, further comprising a first conductive layer and a second conductive layer facing the first conductive layer, in the display area, wherein

the inorganic insulating layer lies between the first conductive layer and the second conductive layer and insulates the first conductive layer and the second conductive layer from each other.

4. The organic electroluminescent display device according to claim 3, wherein

the first conductive layer includes a pixel electrode,

the second conductive layer is disposed in a lower layer than the pixel electrode and is configured to form a capacitance together with the pixel electrode, and

the inorganic insulating layer lies between the first conductive layer and the second conductive layer.