Under-Panel Camera Display Transparency Switching

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Solution Overview

Problem

The inflexible arrangement of under-panel cameras in intelligent terminals due to the central placement causing a black area in the displayed picture during photography, which affects the display effect.

Innovation Solution

A photographing method that alternates between displaying images on the screen and acquiring images with the under-panel camera, setting the display screen into a transparent state to allow light to enter the camera, enabling flexible camera placement without affecting the display effect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the under-panel camera is arranged in the central area of the display screen, then the screen-to-body ratio is maximized, but a black area appears at the center of the displayed picture during photographing, affecting the display effect

Engineering Contradiction:
Improvescreen-to-body ratioVSAvoidblack area in displayed picture
Core Design Contradiction:
Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The display screen alternates between displaying images and becoming transparent in periodic cycles. During each cycle, the screen displays images for a period, then switches to transparent state for a shorter period to allow the camera to capture images. This periodic switching resolves the contradiction by temporarily removing the harmful black area effect only when needed for photographing, while maintaining high screen-to-body ratio.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The display screen transitions from a static opaque state to a dynamic state where it can switch between opaque and transparent. This dynamic capability allows the screen to adapt its transparency based on whether the camera needs to photograph, eliminating the permanent black area issue while preserving the central camera placement for maximum screen-to-body ratio.

Inventive Principle:
Principle #15Dynamics

2Object-affected harmful factors

If the under-panel camera is arranged in an edge area of the display screen, then black areas do not appear in the displayed picture, but the arrangement of the under-panel camera becomes inflexible

Engineering Contradiction:
Improveblack area in displayed pictureVSAvoidarrangement flexibility
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

By implementing periodic switching between display and transparent states, the invention enables the camera to be placed in the central area without causing persistent black areas. The periodic transparent state allows flexible central placement while preventing harmful black area effects during normal display operation.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The invention changes the optical parameter of the display screen from fixed opaque to variable (opaque/transparent switching). This parameter change enables flexible camera placement in the central area, as the screen can become transparent when needed, eliminating the constraint that previously forced edge-area placement to avoid black areas.

Inventive Principle:
Principle #35Parameter changes

3Illumination intensity

If the display screen is set to transparent state for camera acquisition, then light can enter the camera through the screen, but the image display function is temporarily interrupted

Engineering Contradiction:
Improvelight transmission to cameraVSAvoidimage display continuity
Core Design Contradiction:
Illumination intensityVSDuration of action of moving object

Solution Approach 1:

The invention uses periodic action with asymmetric timing: the screen displays images for longer periods and switches to transparent state for shorter periods. This resolves the contradiction by minimizing the interruption of image display while ensuring sufficient light transmission to the camera during the brief transparent intervals.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The transparent state is activated only for the minimum necessary duration required for the camera to capture images. This partial action approach ensures adequate light transmission to the camera while minimizing the interruption to image display, achieving both goals with optimized timing.

Inventive Principle:
Principle #16Partial or excessive action

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

Enables flexible arrangement of the under-panel camera without causing black areas in the displayed picture, improving the display effect by quick switching between image display and camera acquisition, ensuring a seamless user experience.

Implementation Method 1

setting the display screen into a transparent state to allow light to enter the camera

Methodology Applied
Scientific EffectOptical transparency switching:

Data Source

PatentEP4090004B1Photographing method, electronic device, and storage medium
Publication Date: 2025.01.01 ZTE CORP
  • EP4090004B1 patent drawingFigure 1
  • EP4090004B1 patent drawingFigure 2
  • EP4090004B1 patent drawingFigure 3~4

AI summary

Embodiments of the disclosure relate to the field of data processing, and in particular to a photographing method, an electronic device, and a storage medium. In the embodiments of the disclosure, the photographing method includes: upon reception of a camera startup instruction, executing alternated steps of displaying an image on a display screen and acquiring an image with a camera, the alternated steps including setting the display screen into a transparent state after the display screen displays a frame of image; controlling the under-panel camera to acquire a frame of image, and sending the acquired image to the display screen for display; and returning to execute the alternated steps until an end instruction indicating completion of photographing is received. When the display screen is in the transparent state, light is allowed to enter the under-panel camera through the display screen.