Under-display Camera Structure with Separated Driving Circuits

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Solution Overview

Problem

The integration of image acquisition devices in mobile terminals for photo-taking functions necessitates openings on the front, compromising the appearance and display area ratio of smart terminals.

Innovation Solution

A display structure with sub-pixels of multiple colors driven by dedicated circuits, where the driving circuits are positioned in a separate region, allowing for nearly transparent display and enabling the integration of image acquisition devices without obstructing the display area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an opening is made on the front of the mobile terminal for disposing the image acquisition device, then the image acquisition function is enabled, but the appearance is adversely affected and the display area ratio is reduced

Engineering Contradiction:
Improveimage acquisition functionVSAvoiddisplay area ratio
Core Design Contradiction:
Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent moves the image acquisition device from the front surface (2D plane) to the back surface of the display structure, utilizing the third dimension (depth/vertical space). This allows the front surface to remain fully intact for display purposes while the image acquisition device is positioned on the rear side, effectively resolving the conflict between enabling camera functionality and maintaining display area ratio.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Adaptability or versatility

If an opening is made on the front of the mobile terminal for disposing the image acquisition device, then the image acquisition function is enabled, but the appearance is adversely affected

Engineering Contradiction:
Improveimage acquisition functionVSAvoidappearance
Core Design Contradiction:
Adaptability or versatilityVSShape

Solution Approach 1:

By repositioning the image acquisition device to the back surface of the display structure, the patent eliminates the need for front surface openings that would compromise appearance. The device is accommodated in the vertical dimension rather than creating visual disruptions on the front plane, thus maintaining aesthetic integrity while preserving functionality.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Ease of operation

If driving circuits are integrated with each pixel, then each sub-pixel can be driven independently, but the display structure becomes more complex and the display area is reduced

Engineering Contradiction:
Improveindependent sub-pixel controlVSAvoiddisplay structure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The patent extracts the driving circuits from the pixel array structure and positions them in a separate region adjacent to the pixels. This separation allows the pixel structure to remain simple and compact while the driving circuits are independently positioned, reducing overall structural complexity and maximizing display area while preserving independent sub-pixel control capability.

Inventive Principle:
Principle #2Taking out (Extraction)

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 enhances the display area ratio and aesthetic appeal of mobile terminals by allowing image acquisition devices to be placed without blocking the display, while maintaining some display functionality.

Implementation Method 1

each sub-pixel of the plurality of sub-pixels includes an organic light emitting diode

Methodology Applied
Scientific EffectOrganic light emitting diode: Organic Light-emitting Diode

Data Source

PatentUS11538872B2Display structure, display panel using the same and display device using the same
Publication Date: 2022.12.27 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • US11538872B2 patent drawing
  • US11538872B2 patent drawing
  • US11538872B2 patent drawing

AI summary

The present disclosure relates to a display structure, a display panel including the display structure, and a display device including the display panel and an image acquisition device. The display structure includes a plurality of pixels disposed in a first region of the display structure, wherein each pixel of the plurality of pixels includes a plurality of sub-pixels of N number of colors, and each sub-pixel of the plurality of sub-pixels includes an organic light emitting diode; and N number of driving circuits disposed in a second region of the display structure, wherein an ith driving circuit of the N number of driving circuits is configured to drive each sub-pixel of an ith color of the plurality of sub-pixels, wherein 1≤i≤N and N is an integer greater than 1.