Hybrid Display Panel Waveform Matching for Seamless Bezel Transitions

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Solution Overview

Problem

Display panels with self-luminous and liquid crystal pixel circuits experience issues such as unevenness, flickering, and boundary screen tearing due to differing initial emission waveforms and timings, affecting viewing experience.

Innovation Solution

The display panel controls the initial emission waveforms and timings of self-luminous and liquid crystal pixel circuits to be similar by using gradient methods to set current pulse waves, determining a target current level for climbing multiple gradient methods, and determining a target gradient level for climbing multiple gradient levels, thereby aligning the brightness curves of both types of pixel circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If self-luminous pixel circuits use traditional pulse wave driving method, then the driving method is simple, but the brightness curve differs from liquid crystal pixel circuits causing unevenness and flickering

Engineering Contradiction:
Improvedriving method simplicityVSAvoidbrightness uniformity
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies parameter changes by modifying the pulse wave driving parameters of self-luminous pixel circuits to match liquid crystal pixel circuits. Specifically, it adjusts the initial emission waveform parameters (such as gradient bits and gray-scale current bits) to make the brightness curves of both pixel circuit types consistent, thereby eliminating unevenness and flickering while maintaining driving simplicity

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent implements equipotentiality by equalizing the initial emission waveforms of self-luminous and liquid crystal pixel circuits. Through gradient method control and timing synchronization, both pixel circuit types operate under equivalent driving conditions, ensuring uniform brightness output across the entire display panel without boundary screen tearing

Inventive Principle:
Principle #12Equipotentiality

2Adaptability or versatility

If self-luminous pixel circuit uses current pulse waves while liquid crystal pixel circuit uses voltage levels, then each pixel circuit can be optimized for its specific mechanism, but the different initial emission waveforms cause boundary screen tearing

Engineering Contradiction:
Improvepixel circuit optimizationVSAvoidboundary alignment
Core Design Contradiction:
Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies equipotentiality by synchronizing the initial emission waveforms and timings of self-luminous and liquid crystal pixel circuits. Through gradient method control, both pixel circuit types produce consistent brightness curves despite using different driving mechanisms (current pulse waves vs. voltage levels), ensuring seamless boundary transitions and eliminating screen tearing

Inventive Principle:
Principle #12Equipotentiality

Solution Approach 2:

The patent modifies the driving parameters of self-luminous pixel circuits by introducing gradient bits and gray-scale current bits that control the current pulse wave characteristics. This parameter adjustment ensures that the initial emission waveform of self-luminous pixels matches that of liquid crystal pixels, achieving consistent boundary alignment while preserving the optimization benefits of each pixel circuit type

Inventive Principle:
Principle #35Parameter changes

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 alignment results in similar light pattern performance, chromaticity, and behavior between self-luminous and liquid crystal pixel circuits, achieving an extremely narrow bezel or bezel-less and seamless viewing experience.

Implementation Method 1

Each of the self-luminous pixel circuits has multiple light-emitting elements and is disposed in a bezel display area surrounding the main display area in the display panel

Methodology Applied
Scientific EffectLight emission from light-emitting elements: Light Emitting Diode

Data Source

PatentUS12424182B1Display panel
Publication Date: 2025.09.23 AU OPTRONICS CORP
  • US12424182B1 patent drawing
  • US12424182B1 patent drawing
  • US12424182B1 patent drawing

AI summary

A display panel is provided. The display panel includes multiple liquid crystal pixel circuits and multiple self-luminous pixel circuits. The liquid crystal pixel circuit is disposed in a main display area of the display panel. Each of the self-luminous pixel circuits has multiple light-emitting elements and is disposed in a bezel display area surrounding the main display area in the display panel. Each of the self-luminous pixel circuits receives multiple display data, determines a pulse wave gradient method of a driving current for driving a corresponding one of the light-emitting elements based on multiple gradient bits of one of the display data, and determines a target current level for climbing of multiple current pulse waves of the driving current based on multiple gray-scale current bits of the one of the display data.