Terminal Screen With Secondary Display Area For Under-Display Optical Devices

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Solution Overview

Problem

Conventional mobile phone designs face challenges in increasing the screen-to-body ratio while maintaining the functionality of optical devices like cameras and sensors, as these devices' performance is affected by the light transmission properties of the screen when placed underneath the display.

Innovation Solution

A terminal screen design featuring a primary and secondary display area, where the secondary display area has superior light transmission performance, allowing optical devices to be placed underneath without compromising their functionality, by optimizing pixel size, resolution, and pixel control circuit placement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If optical devices are placed underneath the display to increase screen-to-body ratio, then the screen-to-body ratio is improved, but the light transmission performance deteriorates affecting optical device functionality

Engineering Contradiction:
Improvescreen-to-body ratioVSAvoidlight transmission performance
Core Design Contradiction:
Area of moving objectVSObject-affected harmful factors

Solution Approach 1:

The display screen is divided into a first display area with standard light transmission characteristics and a second display area with optimized light transmission characteristics. The second display area, where optical devices are positioned underneath, has enhanced light transmission properties that allow optical devices to function normally while maintaining the increased screen-to-body ratio achieved by placing components underneath the display.

Inventive Principle:
Principle #3Local quality

2Measurement precision

If the secondary display area has higher resolution to match primary display area, then the display quality is improved, but the light transmission performance may deteriorate

Engineering Contradiction:
ImproveresolutionVSAvoidlight transmission performance
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The second display area is configured with resolution equal to or higher than the first display area while simultaneously optimizing its light transmission characteristics. This local optimization allows high-resolution display in the region underneath optical devices without compromising light transmission, as the pixel structure and optical properties are specifically tailored for this area to balance both resolution and light transmission requirements.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS11029910B2Terminal screen and terminal
Publication Date: 2021.06.08 BEIJING XIAOMI MOBILE SOFTWARE CO LTD
  • US11029910B2 patent drawing
  • US11029910B2 patent drawing
  • US11029910B2 patent drawing

AI summary

A display screen of a terminal includes a substrate, and a display layer over the substrate. The display layer includes a primary display area and a secondary display area. The secondary display area has a resolution equal to or greater than that of the primary display area. The light transmission performance of the secondary display area is superior to that of the primary display area.