Under-Display Light Absorber Layout for Camera Reflection Noise

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Solution Overview

Problem

Full screen displays face issues with image overlap or noise due to external light reflection from internal components like cameras, which affects image quality and user experience.

Innovation Solution

A display apparatus design featuring a display panel with a transparent first area for external light entry and an opaque second area with a light absorption portion surrounding the first area to absorb reflected light, preventing re-reflection and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If additional devices such as a camera are arranged inside the main body to achieve full screen display, then the design satisfaction is improved and manufacturing process is simplified, but external light reflection causes image overlap or noise

Engineering Contradiction:
Improvefull screen display appearanceVSAvoidexternal light reflection
Core Design Contradiction:
ShapeVSObject-affected harmful factors

Solution Approach 1:

A light absorbing member is introduced as an intermediary element between the external light source and the camera sensor. This member selectively absorbs reflected external light before it reaches the camera, preventing image overlap and noise while maintaining the full screen display design.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful reflected external light into a controlled absorption process. By positioning the light absorbing member to receive reflected light and convert it into heat energy, the harmful reflection is transformed into a beneficial absorption that prevents image degradation.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

2Reliability

If a light absorption portion is added to prevent external light re-reflection, then image quality is improved, but device complexity increases

Engineering Contradiction:
Improveimage qualityVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The light absorbing member is positioned locally at the first area of the display panel where external light enters and reflects toward the camera. This localized approach addresses the reflection problem only where it occurs, rather than requiring a complete light absorption system throughout the entire device.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The display panel is divided into different functional areas: a first area with the light absorbing member for light control, and a second area without it. This segmentation allows the light absorption function to be implemented only where necessary, reducing overall device complexity.

Inventive Principle:
Principle #1Segmentation

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 enhances image clarity by reducing external light re-reflection, thereby minimizing image overlap and noise, while maintaining a sleek, full-screen display appearance without protruding elements.

Implementation Method 1

a light absorption portion arranged in the second area of the display panel to surround the first area of the display panel... external light reflected from the auxiliary member is prevented from being re-reflected in the auxiliary member

Methodology Applied
Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS12120922B2Display with light absorber round optical element
Publication Date: 2024.10.15 LG DISPLAY CO LTD
  • US12120922B2 patent drawing
  • US12120922B2 patent drawing
  • US12120922B2 patent drawing

AI summary

A display apparatus is disclosed, which includes a display panel having a first area and a second area, a main body supporting the display panel, an auxiliary member arranged in the main body and overlapped with the first area of the display panel, and a light absorption portion arranged in the second area of the display panel to surround the first area of the display panel. Therefore, external light reflected from the auxiliary member is prevented from being re-reflected in the auxiliary member, whereby image overlap or noise may be prevented from occurring.