Dual Pixel Structure Under-Display Camera Luminance Uniformity

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Solution Overview

Problem

Display apparatuses with integrated optical modules, such as camera or sensor modules, face challenges in maintaining uniform luminance due to the presence of sensors under the display panel, leading to image ununiformity and potential data distortion or mixing between different pixel areas.

Innovation Solution

The display apparatus employs a dual pixel structure with distinct configurations in areas overlapping and not overlapping with the optical module, where pixels in overlapping areas have a specific first pixel structure and those in non-overlapping areas have a second pixel structure, ensuring data line connections prevent data distortion and mixing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a sensor substrate is disposed under the display panel to enable sensing functions, then sensing capability is improved, but luminance ununiformity and image quality deteriorate due to transmission areas

Engineering Contradiction:

Improvesensing capabilityVSAvoidluminance uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The display panel is divided into a first display area overlapping with the optical module and a second display area not overlapping with the optical module. Each area has its own pixel structure optimized for its function, allowing the sensor area to maintain sensing capability while the display areas maintain luminance uniformity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different pixel structures are used in different regions of the display panel. The first pixel structure in the overlapping area is designed to prevent data distortion and mixing, while the second pixel structure in the non-overlapping area is optimized for display quality. This local differentiation resolves the contradiction between sensing capability and luminance uniformity.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If a single pixel structure is used across the entire display panel, then manufacturing simplicity is improved, but data distortion and mixing occur in areas overlapping with optical modules

Engineering Contradiction:

Improvepixel structure consistencyVSAvoiddata integrity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The display panel is segmented into two distinct pixel structure types: a first pixel structure for areas overlapping with the optical module and a second pixel structure for areas not overlapping. This segmentation prevents data distortion and mixing in the overlapping area while maintaining manufacturing feasibility through standardized design patterns.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different pixel structures locally based on the functional requirements of each region. The first pixel structure in the overlapping area is specifically designed to prevent data distortion, while the second pixel structure in the non-overlapping area is optimized for general display performance, thus ensuring data integrity without compromising manufacturing ease.

Inventive Principle:

Principle #3Local quality

3Area of stationary object

If the display panel area is increased to cover the optical module, then display coverage is improved, but data distortion and mixing between pixel areas increase

Engineering Contradiction:

Improvedisplay coverageVSAvoiddata separation accuracy

Core Design Contradiction:

Area of stationary objectVSManufacturing precision

Solution Approach 1:

The display panel is divided into a first display area that overlaps with the optical module and a second display area that does not overlap. This segmentation allows the display to cover the optical module area while using different pixel structures in each region to prevent data distortion and mixing, thus maintaining data separation accuracy across the entire display area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different pixel structures are applied to different regions: the first pixel structure in the overlapping area is designed to prevent data distortion and mixing, while the second pixel structure in the non-overlapping area is optimized for display quality. This local differentiation enables full display coverage without compromising data separation accuracy.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11640810B2Display apparatus and method of driving the same

Publication Date: 2023.05.02 SAMSUNG DISPLAY CO LTD

AI summary

A display apparatus includes an optical module, a display panel and a display panel driver. The display panel is disposed on the optical module. The display panel driver is configured to drive the display panel. The display panel includes a first display area including at least a portion overlapping with the optical module and a second display area not overlapping with the optical module in a plan view. The first display area includes pixels having a first pixel structure. The second display area includes pixels having a second pixel structure different from the first pixel structure.