Display substrate and preparation method thereof, display panel, and display device

US10930726B2 · kind B2 · utility

Assignees

• HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD. · CN
• BOE Technology Group Co., Ltd. · CN

Inventors

• Qinghe Wang · Beijing, CN
• Liangchen Yan · Beijing, CN
• Dongfang Wang · Lexington, US
• Tongshang Su · Beijing, CN
• Jun Wang · Nanhu, CN
• Guangyao Li · Beijing, CN
• Yang Zhang · San Diego, US
• Xuechao Sun · Beijing, CN

Key dates

• Filing date: Jan 11, 2019
• Grant date: Feb 23, 2021
• Expiry date: Mar 16, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/351

Abstract

Provided are a display substrate and a preparation method thereof, a display panel, and a display device. The display substrate includes a substrate and a plurality of pixel units on the substrate. The pixel unit comprises a plurality of functional layers that are sequentially arranged in a direction away from the substrate. At least one of the plurality of functional layers, which is close to the substrate, constitutes a vertical thin film transistor (VTFT). At least one of the plurality of functional layers, which is away from the substrate, constitutes an organic light-emitting transistor (OLET). An orthographic projection region of the OLET on the substrate and an orthographic projection region of the VTFT on the substrate at least partially overlap.