Panel Driver Multi-Frequency Regions for Lower Display Power

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Solution Overview

Problem

Existing display devices fail to reduce power consumption effectively when displaying still images or partial images, as low frequency driving is not applied to regions where no input image data is stored in the frame memory.

Innovation Solution

A display device that drives panel regions at different frequencies by receiving a multi-frequency driving enable command and boundary setting command, allowing it to drive only a portion of the display panel based on input image data without storing them in a frame memory.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If low frequency driving is applied to reduce power consumption, then power consumption is reduced, but display quality deteriorates when still images or partial images are displayed

Engineering Contradiction:

Improvepower consumptionVSAvoiddisplay quality

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The display panel is divided into multiple panel regions (first panel region and second panel region) that can be driven at different frequencies. The panel driver receives boundary setting commands to identify region boundaries and selectively applies low frequency driving to specific regions where still images are displayed, while maintaining normal frequency driving in other regions. This segmentation allows simultaneous optimization of power consumption and display quality across different areas of the display panel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different panel regions are driven at different frequencies based on their content characteristics. Regions displaying static content (still images) are driven at low frequency to save power, while regions displaying dynamic content (videos, moving images) continue to be driven at normal frequency to maintain display quality. The panel driver determines this by analyzing input image data and receiving boundary setting commands that define regional boundaries.

Inventive Principle:

Principle #3Local quality

2Reliability

If the entire display panel is driven at normal frequency when still images are displayed, then display quality is maintained, but power consumption is not reduced

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The display panel is segmented into multiple driveable regions with distinct boundary settings. The panel driver uses boundary setting commands to identify which regions should be driven at normal frequency and which should be driven at low frequency. This segmentation enables selective frequency driving that simultaneously maintains display quality in dynamic regions and reduces power consumption in static regions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The driving frequency of different panel regions is dynamically adjusted based on real-time analysis of input image data and boundary setting commands. The panel driver determines whether each region displays static or dynamic content and accordingly sets the driving frequency for that region, allowing the system to adapt between power-saving mode and quality-priority mode on a regional basis.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If multi-frequency driving is implemented without frame memory, then device complexity is reduced, but control precision for frequency selection deteriorates

Engineering Contradiction:

Improvedevice complexityVSAvoidcontrol precision

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

Boundary setting commands are received and processed in advance before the actual multi-frequency driving begins. The panel driver stores these boundary definitions and uses them to guide the frequency selection process during operation. This preliminary configuration allows the system to achieve precise control without requiring complex real-time analysis or frame memory storage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The panel driver autonomously determines which panel regions should be driven at which frequencies by analyzing input image data characteristics and applying the stored boundary settings. The system self-adjusts the driving frequency based on content type (still image vs. video) without requiring external intervention or complex control structures, thereby maintaining control precision while reducing device complexity.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250372022A1Display device performing multi-frequency driving and electronic device

Publication Date: 2025.12.04 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display panel, and a panel driver which drives the display panel. The panel driver receives a multi-frequency driving (“MFD”) enable command from a host processor. In a first frame period, the panel driver receives a boundary setting command indicating a boundary between a first panel region and a second panel region of the display panel from the host processor. In a second frame period after the first frame period, the panel driver receives input image data for the first panel region from the host processor, does not receive the input image data for the second panel region from the host processor, drives the first panel region based on the input image data for the first panel region, and does not drive the second panel region.