Display Driver Circuit Synchronizes Image Output Timing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In electronic devices, merging multiple images for output can result in different timing issues due to varying output paths, leading to screen flickering or unintended image timing.

Innovation Solution

An electronic device with a display panel and a display driving circuit that generates and synchronizes background and partial images by determining the presence of specific objects within the images, merging or outputting them accordingly to ensure synchronized timing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple images are merged and output through different paths (application processor to display driver IC to display panel, and display driver IC directly to display panel), then the display can show multiple images (e.g., watch image and lock screen), but the output timings of the images become different, causing screen flickering or unintended image timing

Engineering Contradiction:

Improveability to merge and output multiple imagesVSAvoidimage output timing synchronization

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The display driver IC generates a dummy image in advance and stores it in a buffer before the actual image output timing. This preliminary preparation ensures that when multiple images need to be merged, the display driver IC has a ready-made image to work with, allowing it to synchronize the output timing of merged images from different sources without causing flickering or timing issues

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the display driver IC generates a dummy image and merges it with another image, then the output timing can be synchronized, but the device complexity increases due to additional image processing steps

Engineering Contradiction:

Improveimage output timing synchronizationVSAvoidimage processing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The display driver IC performs the dummy image generation and merging operations autonomously without requiring additional control circuits or external intervention. The display driver IC uses its existing resources (buffer, image processing capabilities) to generate and merge images, thereby achieving timing synchronization while minimizing the increase in device complexity

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3706104B1Display driver circuit for synchronizing output timing of images in low power state

Publication Date: 2022.04.27 SAMSUNG ELECTRONICS CO LTD

Figure 1
Figure 2A
Figure 2B

AI summary

An electronic device according to an embodiment of the present invention comprises: a housing; a display panel disposed inside the housing; a display driver circuit electrically connected to the display panel; and a processor for generating a background image output through the display panel to transmit the same to the display driver circuit.