Notched Display Panel Brightness Uniformity via White Sub-pixel Segmentation

Solution Overview

Problem

Full-screen display panels with notches often experience uneven brightness between the notched area and the normal display area due to different electrical loads, leading to undesirable display effects.

Innovation Solution

A display panel design with a first display area having a notched boundary and a second display area, where the first display area includes X white sub-pixels and Y single color sub-pixels, and the second display area includes Y single color sub-pixels, with specific arrangements and area ratios to reduce brightness differences, and the use of transistors for individual control of sub-pixels to adjust brightness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If full-screen display panels with notches are designed to increase screen-to-body ratio, then display area is improved, but brightness uniformity deteriorates due to different electrical loads in notched area versus normal display area

Engineering Contradiction:

Improvedisplay areaVSAvoidbrightness uniformity

Core Design Contradiction:

Area of stationary objectVSIllumination intensity

Solution Approach 1:

The patent applies local quality by introducing white sub-pixels specifically in the notched display area while maintaining conventional single-color sub-pixels in the normal display area. This localized modification allows the notched area to have different electrical load characteristics, thereby improving brightness uniformity across the entire display panel while preserving the full-screen design.

Inventive Principle:

Principle #3Local quality

2Illumination intensity

If white sub-pixels are added to the notched display area to improve brightness uniformity, then brightness uniformity is improved, but device complexity increases due to different pixel arrangements

Engineering Contradiction:

Improvebrightness uniformityVSAvoidpixel arrangement complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent segments the display panel into two distinct regions: a notched display area with white sub-pixels and a normal display area with single-color sub-pixels. This segmentation allows each region to be optimized independently for its specific requirements, improving brightness uniformity in the notched area while maintaining simplicity in the normal area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by introducing white sub-pixels specifically in the notched display area while maintaining conventional single-color sub-pixels in the normal display area. This localized modification allows the notched area to have different electrical load characteristics, thereby improving brightness uniformity across the entire display panel while preserving the full-screen design.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11263949B2Display panel, control method thereof, and display apparatus

Publication Date: 2022.03.01 BEIJING BOE OPTOELECTRONCIS TECH CO LTD

AI summary

A display panel, a control method and a display apparatus are provided. The display panel includes a first display area having a notched boundary and a second display area. The first display area includes a first pixel unit group comprising X white sub-pixel or sub-pixels and Y first single color sub-pixels, and the second display area includes a second pixel unit group comprising Y second single color sub-pixels, where X is an integer of at least 1 and Y is an integer of at least 1.