Display Panel Circuit Layout for Under-Screen Uniformity

Solution Overview

Problem

Display panels with under-screen cameras suffer from poor display uniformity due to varying lead wire lengths causing different coupling capacitances, leading to image quality issues.

Innovation Solution

A display panel design with separate first and second display areas, where built-in light-emitting devices in the first area are driven by internal circuits, and external light-emitting devices in the second area are driven by external circuits, reducing lead wire numbers and lengths, optimizing the arrangement of driving circuits, and using transparent conductive materials for signal lines.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If external driving circuits are used to drive light-emitting devices, then device complexity is reduced and ease of manufacture is improved, but lead wire length increases causing varying coupling capacitances that deteriorate display uniformity

Engineering Contradiction:

Improveease of manufactureVSAvoiddisplay uniformity

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The display panel is divided into a first display area with built-in driving circuits and a second display area with external driving circuits. This segmentation allows different driving approaches to be used in different regions, optimizing both manufacturing ease and display uniformity by controlling lead wire lengths in the first area while maintaining simplicity in the second area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display panel are assigned different driving circuit configurations. The first display area uses built-in circuits with short lead wires for high uniformity requirements, while the second display area uses external circuits for manufacturing simplicity. This local differentiation resolves the contradiction by applying the appropriate solution to each region's specific needs.

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If built-in driving circuits are used in the first display area, then display uniformity is improved by reducing lead wire length, but device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvedisplay uniformityVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The display panel is divided into a first display area with built-in driving circuits and a second display area with external driving circuits. This segmentation allows different driving approaches to be used in different regions, optimizing both manufacturing ease and display uniformity by controlling lead wire lengths in the first area while maintaining simplicity in the second area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display panel are assigned different driving circuit configurations. The first display area uses built-in circuits with short lead wires for high uniformity requirements, while the second display area uses external circuits for manufacturing simplicity. This local differentiation resolves the contradiction by applying the appropriate solution to each region's specific needs.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If lead wires are used to connect external driving circuits to light-emitting devices, then ease of manufacture is improved, but diffraction effects and coupling capacitance increase reducing image quality

Engineering Contradiction:

Improveease of manufactureVSAvoiddiffraction effects

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The display panel is divided into a first display area with built-in driving circuits and a second display area with external driving circuits. This segmentation allows different driving approaches to be used in different regions, optimizing both manufacturing ease and display uniformity by controlling lead wire lengths in the first area while maintaining simplicity in the second area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The driving circuit function is extracted from the light-emitting device structure in the second display area, placing it externally to eliminate the need for internal lead wires. This extraction removes the source of diffraction effects and coupling capacitance from the optical path while maintaining manufacturing simplicity through external connections.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12482417B2Display panel and display apparatus

Publication Date: 2025.11.25 BEIJING BOE TECH DEV CO LTD

AI summary

Provided are a display panel and a display apparatus. The display panel includes: a first display area and a second display area, a transmittance of the first display area is greater than a transmittance of the second display area; the first display area includes a plurality of built-in light-emitting devices and at least one first driving circuit, the plurality of built-in light-emitting devices include a first light-emitting device and a second light-emitting device, the first driving circuit is connected to the first light-emitting device, the second display area includes at least one third light-emitting device and a plurality of external driving circuits, the plurality of external driving circuits include a second driving circuit and a third driving circuit, the second driving circuit is connected to the second light-emitting device through a lead wire, and the third driving circuit is connected to the third light-emitting device.