Camera-Under-Display Liquid Crystal Panel Design

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Solution Overview

Problem

In electronic devices with a display and camera on the same side, there is a challenge in expanding the display area while accommodating the camera, as existing designs require space for the camera, which limits the display size and can cause unwanted absorption or coloring of light by the camera due to the color filter layer.

Innovation Solution

The design incorporates a liquid crystal panel between two polarizers, where the camera overlaps a region that does not include the color filter layer, allowing for expanded display area without needing additional space for the camera, and uses control electrodes and light-shielding layers to control light transmission for improved image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the camera is disposed outside the display portion, then the camera can be accommodated, but the display area cannot be expanded

Engineering Contradiction:

Improvedisplay areaVSAvoidspace arrangement

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The camera and display portion are merged into a single integrated structure where the camera is disposed within the display portion rather than outside it. This allows the display area to be expanded while accommodating the camera in the same space, eliminating the need for separate space allocation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The camera is nested within the display portion structure, with the camera disposed in a region that overlaps with the display portion. This nesting arrangement allows both components to coexist in the same space, maximizing the display area while accommodating the camera.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Manufacturing precision

If the camera is disposed outside the display portion, then the camera can be accommodated, but clear picture capture becomes difficult

Engineering Contradiction:

Improveimage clarityVSAvoidlight absorption by color filter layer

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The camera is extracted from the conventional position outside the display portion and repositioned to overlap with the display portion. This extraction from the traditional layout allows the camera to be positioned where it can capture light more effectively without being blocked by the color filter layer.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The camera is positioned in a different spatial dimension relative to the display portion, overlapping with it rather than being adjacent. This dimensional change allows the camera to capture light from a different angle and position, avoiding the harmful light absorption by the color filter layer that occurs in conventional side-mounted configurations.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Area of stationary object

If the display portion is expanded, then the display area increases, but space for the camera is reduced

Engineering Contradiction:

Improvedisplay areaVSAvoidcamera space

Core Design Contradiction:

Area of stationary objectVSVolume of moving object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

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 configuration enables the expansion of the display area while maintaining clear image capture by minimizing the impact of the color filter layer on camera light and allowing for adjustable light transmission, enhancing image clarity and depth of focus.

Implementation Method 1

a liquid crystal panel between two polarizers, where the camera overlaps a region that does not include the color filter layer

Methodology Applied

Scientific EffectPolarisation: Polarisation

Implementation Method 2

The liquid crystal panel comprises a first scanning line, a first signal line intersecting the first scanning line

Methodology Applied

Scientific EffectLiquid crystals: Liquid Crystals

Implementation Method 3

uses control electrodes and light-shielding layers to control light transmission for improved image quality

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS11703722B2Electronic device

Publication Date: 2023.07.18 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, an electronic device includes a first camera, a first polarizer, a second polarizer, and a liquid crystal panel disposed between the first polarizer and the second polarizer. The liquid crystal panel includes a first scanning line, a first signal line intersecting the first scanning line, a first switching element electrically connected to the first scanning line and the first signal line, and a first control electrode electrically connected to the first switching element. The first control electrode overlaps the first camera, and is disposed in an annular first region.