OLED display panel

• US 10,665,656 B2
• Filed: 09/14/2018
• Issued: 05/26/2020
• Est. Priority Date: 04/24/2018
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Lei, Lu, Sun, Yexi
• Primary Examiner(s): Clark, Jasmine J
• Application Number:
  US16/097,278
• Publication Number:
  US 20190326377A1
• Time in Patent Office: 620 Days
• CPC Class Codes: H04M 1/0266 for a display module assembly
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/121 characterised by the geometry or disposition of pixel elements
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/80515 characterised by their shape
• CPC Class Codes: H10K 59/873 Encapsulations

Abstract

An OLED display panel and a mobile phone are disclosed. The OLED display panel includes a transparent display region and an effective display region that surrounds the transparent display region and completely covering an OLED display panel. The transparent display region is used for installing an electric device in front of the mobile phone and disposed below the transparent display region, which can achieve a high screen occupation ratio to give users a better visual experience. Additional and patterned OLED anode layer and the OLED light-emitting layer are arranged in the effective display region comparing to the transparent display region, except for the OLED anode layer and the OLED light-emitting layer, the effective display region and the transparent display region are provided with same film layers, and the same film layers is finished in a same manufacturing process, which can avoid an irregular-shape cutting, simplify production process and reduce cost.

Claims

1. An organic light emitting diode (OLED) display panel, comprising:

at least one transparent display region and an effective display region that surrounds the transparent display region and completely covering an OLED display panel; and

multiple OLEDs disposed in the effective display region for displaying an image, wherein each of the multiple OLEDs includes an OLED anode layer and an OLED light-emitting layer;

wherein the transparent display region comprises multiple film layers and the effective display region comprises multiple film layers; and

wherein except for the OLED anode layer and the OLED light-emitting layer, the multiple film layers of the effective display region respectively correspond to the multiple film layers of the transparent display region.

2. The OLED display panel according to claim 1, wherein the multiple film layers of the transparent display region comprise a substrate, a thin film transistor layer, a planarization layer, an organic photoresist layer, an OLED cathode layer, and an encapsulation layer which are stacked sequentially from bottom to top;

wherein the multiple film layers of the effective display region includes comprise;

the substrate;

the thin film transistor layer stacked on the substrate;

the planarization layer stacked on the thin-film transistor layer, and the planarization layer located in the effective display region is provided with a first via hole;

an OLED anode layer provided on the planarization layer and connecting the thin film transistor layer through the first via hole;

the organic photoresist layer stacked on the planarization layer and the OLED anode layer and the organic photoresist layer located in the effective display region is provided with a second via hole and the second via hole exposes the OLED anode layer;

an OLED light-emitting layer filled in the second via hole and connected to the OLED anode layer;

the OLED cathode layer stacked on the organic photoresist layer and the OLED light-emitting layer; and

the encapsulation layer stacked on the OLED cathode layer;

wherein in the effective display region, the OLED anode layer, the OLED light-emitting layer and the OLED cathode layer form the OLED.

3. The OLED display panel according to claim 2, wherein each of the multiple film layers of the transparent display region is formed simultaneously with a corresponding one of the multiple film layers of the effective display region.

4. The OLED display panel according to claim 1, wherein the at least one transparent display region comprises multiple transparent display regions that are arranged in a line alongside an edge of the OLED display panel.

5. The OLED display panel according to claim 2, wherein a material of the substrate is polyimide (PI).

6. The OLED display panel according to claim 2, wherein a material of each of the planarization layer and the organic photoresist layer is a transparent organic material.

7. The OLED display panel according to claim 2, wherein a material of the OLED anode layer is a stacked combination of Indium Tin Oxide (ITO) and silver.

8. A mobile phone, comprising:

an OLED display panel as claimed in claim 1; and

an electronic device which is arranged in the mobile phone and disposed below the transparent display region of the OLED display panel of the mobile phone.

9. The mobile phone according to claim 8, wherein a shape and a size of the transparent display region is matched with a shape and a size of the electronic device which is disposed below the transparent display region of the OLED display panel of the mobile phone.

10. The mobile phone according to claim 9, wherein the electronic device comprises one of a camera, a distance sensor, an infrared sensor and an ambient light sensor.