Display Light-Emitting Driver Staging for Lower Power Use

Solution Overview

Problem

Modern display devices require increased power consumption due to higher resolution and circuit complexity, leading to inefficiencies in energy usage.

Innovation Solution

A display device design that includes a scan driver and light emitting driver configured to alternate scan and light emitting signals at different levels during specific periods, utilizing a frequency multiplier to reduce power consumption by optimizing signal transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If the display device operates at high resolution with increased circuit complexity, then display quality is improved, but power consumption increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by alternating between first scan periods (with light emitting signals at turn-on level) and second scan periods (with light emitting signals at turn-off level). During the second scan periods, the light emitting driver transmits signals at turn-off level to maintain pixels in non-emitting state, thereby reducing power consumption while still maintaining display functionality during first scan periods

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies dynamics by dynamically adjusting the light emitting signal levels based on the scan period type. The light emitting driver changes between turn-on level and turn-off level signals, and the pixels dynamically switch between emitting and non-emitting states, optimizing power consumption based on operational requirements

Inventive Principle:

Principle #15Dynamics

2Illumination intensity

If continuous light emitting signals are transmitted during all scan periods, then pixel emission is maintained, but power consumption increases unnecessarily

Engineering Contradiction:

Improvepixel emissionVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by alternating between first scan periods (with light emitting signals at turn-on level) and second scan periods (with light emitting signals at turn-off level). During the second scan periods, the light emitting driver transmits signals at turn-off level to maintain pixels in non-emitting state, thereby reducing power consumption while still maintaining display functionality during first scan periods

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies discarding and recovering by intentionally discarding pixel emission during second scan periods when light emitting signals are at turn-off level. This allows the system to recover power that would otherwise be consumed continuously, while maintaining the ability to restore full emission capability during first scan periods

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS20250279046A1Display device

Publication Date: 2025.09.04 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a first scan driver, a light emitting driver, and pixels that receive data voltages in response to first scan signals at a turn-on level and are in a non-emitting state in response to light emitting signals applied at a turn-off level. The light emitting driver includes a plurality of light emitting stages. During first scan periods, the light emitting stages sequentially generate light emitting signals of the turn-off level in units of one light emitting stage, and during second scan periods, the light emitting stages sequentially generate light emitting signals of the turn-off level in units of m light emitting stages, where m is an integer greater than 1.