Under-Display Camera Pixel Layout for Transmittance Control

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Solution Overview

Problem

Existing display devices face challenges in balancing display quality and imaging quality, particularly when a camera module is integrated beneath the display module, as the light transmission state of the display module affects imaging quality.

Innovation Solution

The display device incorporates a camera region with first display pixels of larger area than second display pixels, allowing light to pass through in camera mode for improved imaging and blocking light in display mode for enhanced contrast.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the display module is placed above the camera module to achieve narrow border or no border design, then the imaging function can be performed while displaying, but the light transmission state of the display module affects imaging quality

Engineering Contradiction:

Improveimaging functionVSAvoidimaging quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The display area is divided into a first area corresponding to the camera module and a second area not corresponding to the camera module. The first area includes first sub-pixels with larger aperture ratios for light transmission, while the second area includes second sub-pixels with smaller aperture ratios for display quality, allowing simultaneous optimization of both imaging and display functions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the display module are assigned different optical properties: the first area above the camera module uses larger sub-pixels for high light transmittance to improve imaging quality, while the second area uses smaller sub-pixels for better display contrast and quality, creating local optimization for each functional zone

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If larger aperture ratio is used in camera region to improve imaging quality, then light transmittance increases, but display quality may be compromised

Engineering Contradiction:

Improveimaging qualityVSAvoiddisplay quality

Core Design Contradiction:

Manufacturing precisionVSIllumination intensity

Solution Approach 1:

The display module segments sub-pixels into first sub-pixels in the camera region with larger aperture ratios and second sub-pixels in the non-camera region with smaller aperture ratios, allowing each segment to be optimized for its specific function without compromising the other

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by giving different aperture ratio characteristics to different spatial regions: the first area above the camera module has larger sub-pixel aperture ratios for maximum light transmission, while the second area has smaller aperture ratios for optimal display performance, resolving the conflict between imaging and display quality

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If smaller aperture ratio is used in display region to improve display quality, then light blocking improves, but imaging quality suffers

Engineering Contradiction:

Improvedisplay qualityVSAvoidimaging quality

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The display module is segmented into first sub-pixels for the camera region and second sub-pixels for the display region, with each segment having optimized aperture ratios for its specific function, eliminating the need to compromise either imaging or display quality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different aperture ratio characteristics are applied locally to different regions: smaller aperture ratios in the second area for improved display contrast and larger aperture ratios in the first area for improved imaging, with each local region optimized for its primary function

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design improves imaging quality by increasing light transmittance in camera mode and maintaining display quality by blocking unwanted light leakage in display mode, reducing diffraction and interference.

Implementation Method 1

The first region includes a plurality of first display pixels. The display region includes a plurality of second display pixels... allows a light beam to pass through... blocking light in display mode for enhanced contrast

Methodology Applied

Scientific EffectLight absorption and transmission control: Absorption (EM radiation)

Data Source

PatentUS20250221234A1Display device having transmittance control for under-display camera pixels

Publication Date: 2025.07.03 INNOLUX CORP

AI summary

The disclosure provides a display device that includes a camera region and a display region adjacent to the camera region. The camera region includes a first region and a second region which allows a light beam to pass through. The first region includes a plurality of first display pixels. The display region includes a plurality of second display pixels. An area of each of the plurality of first display pixels is greater than an area of each of the plurality of second display pixels. The first region is adjacent to the second region. The first region includes a plurality of edges, and the second region is adjacent to two of the plurality of edges.