OLED Pixel Dual Driver AM PM Segmentation

Solution Overview

Problem

Organic light emitting display devices face challenges in reducing power consumption due to the limitations of existing driving methods, which affect the efficiency and longevity of pixel operations.

Innovation Solution

A pixel is designed to utilize a combined driving method, incorporating both active matrix (AM) and passive matrix (PM) driving techniques, where the first driver operates using the AM method and the second driver uses the PM method, with non-overlapping operation periods to optimize power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If active matrix (AM) driving method is used, then response speed and image clarity are improved, but power consumption increases

Engineering Contradiction:

Improveresponse speedVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The pixel is divided into two separate drivers: a first driver configured for active matrix (AM) driving and a second driver configured for passive matrix (PM) driving. This segmentation allows the pixel to selectively operate in different driving modes, using AM driving for high-speed response requirements and PM driving for power-saving scenarios, thus resolving the contradiction between response speed and power consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pixel implements dynamic switching between AM and PM driving methods based on operational requirements. The first driver and second driver can be selectively activated, allowing the system to adapt its driving mode in real-time, optimizing the balance between response speed and power consumption depending on the display content and timing requirements.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If passive matrix (PM) driving method is used, then power consumption is reduced, but response speed and image clarity deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoidresponse speed

Core Design Contradiction:

Use of energy by moving objectVSSpeed

Solution Approach 1:

The pixel is divided into two separate drivers: a first driver configured for active matrix (AM) driving and a second driver configured for passive matrix (PM) driving. This segmentation allows the pixel to selectively operate in different driving modes, using AM driving for high-speed response requirements and PM driving for power-saving scenarios, thus resolving the contradiction between response speed and power consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pixel implements dynamic switching between AM and PM driving methods based on operational requirements. The first driver and second driver can be selectively activated, allowing the system to adapt its driving mode in real-time, optimizing the balance between response speed and power consumption depending on the display content and timing requirements.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If single driving method is used, then device complexity is reduced, but adaptability to different operational requirements deteriorates

Engineering Contradiction:

Improvedriver configurationVSAvoiddriving method adaptability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The pixel is designed with multi-functionality by incorporating both a first driver for AM driving and a second driver for PM driving. This universal design enables the pixel to handle diverse operational requirements, whether high-speed response is needed or power saving is prioritized, without requiring different pixel designs for different scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The pixel implements dynamic switching between AM and PM driving methods based on operational requirements. The first driver and second driver can be selectively activated, allowing the system to adapt its driving mode in real-time, optimizing the balance between response speed and power consumption depending on the display content and timing requirements.

Inventive Principle:

Principle #15Dynamics

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 approach allows for reduced power consumption and improved efficiency in pixel operation by selectively employing the most suitable driving method based on the operational requirements, thereby enhancing the overall performance of the organic light emitting display device.

Implementation Method 1

An organic light emitting display device displays an image by using organic light emitting diodes (OLEDs) that generate light components by re-combination of electrons and holes

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS10643538B2Pixel and organic light emitting display device including the same

Publication Date: 2020.05.05 SAMSUNG DISPLAY CO LTD

AI summary

A pixel includes: a first driver connected to a first driving data line; a second driver connected to a second driving data line; and an organic light emitting diode (OLED) connected to the first driver and the second driver, the OLED to emit light in response to a data signal supplied to the first driving data line when the first driver is driven, and to emit light in response to a data signal supplied to the second driving data line when the second driver is driven.